中文版 | English
Support
     Technical Support
     FAQ
     After Service
     Sales Network

Tel:86 755 27308212 / 27307702 / 27308249 / 27307589
Fax:86 755 27307986
Web:www.szkemin.com
E-mail:qiuyangqi@szkemin.com
Add:No.46,Mei Hua Road,East District,Baishixia,Fu Yong Town,Bao'an District,Shenzhen, Guangdong, China
Code:518103
Technical Support
Basic knowledge of temperature sensor
Visit: Date:2013-11-29

A basic concept, temperature measurement

1, the definition of temperature:

Temperature is a physical quantity to describe the degree of hot and cold objects. Some characteristics of temperature only by varying with the temperature of the object to measure indirectly, and used to measure the value of the object temperature scale named scale. It provides the starting point temperature readings (zero) basic unit and temperature measurement. The use of the scale with Fahrenheit, Celsius, thermodynamic temperature scale and international practical temperature scale.

Celsius scale (c) provides that: under standard pressure, the melting point of ice is 0 degrees, the boiling point of water is 100 degrees, the middle is divided into 100 equal parts, each part is 1 degrees Celsius, symbol C.

Fahrenheit (f) provides that: under standard pressure, the melting point of ice is 32 degrees, the boiling point of water is 212 degrees, the middle is divided into 180 equal parts of every part is 1 degrees Fahrenheit symbol F.

Thermodynamic temperature scale (symbol T) also known as the Kelvin scale (symbol K), or absolute scale, it provides molecular motion stops when the temperature of absolute zero.

International practical temperature scale: is an international agreement of the scale, it is close to the thermodynamic temperature scale, and high repetition accuracy, easy to use. The international temperature scale was 1975 Fifteenth International Conference of the "right of international practical temperature scale of 1968 -1975 revised edition", recorded as: IPTS-68 (REV-75). But because the IPTS-68 temperature is not to catch, to the 1989 meeting of the CIPM international ITS-90 authorization in 1990 18 international metering assembly resolution seventh, ITS-90 instead of IPS-68. In China, since January 1, 1994 the full implementation of ITS-90 international temperature scale.

The international temperature scale of 1990:

A, temperature unit: thermodynamic temperature is a basic skill in hand physical quantity, unit Kelvin it, defined as the thermodynamic temperature of the triple point of water 1/273.16, used with the 273.15K (freezing) expressed as a difference of temperature, so it still retains the method. According to the definition, degrees Celsius temperature difference is equal to Kelvin, also available degrees Celsius or Kelvin said. International temperature scale ITS-90 while the definition of international Kelvin temperature (symbol T90) and international Celsius (symbol T90).

General B, the international temperature scale of ITS-90: the highest temperature of ITS-90 by 0.65K up to Planck's law of radiation using monochromatic radiation can actually measure. ITS-90 is formulated in the full range, the best estimate any temperature adopted when the value of T, T90 measurements are much more convenient compared with direct measurements of thermodynamic temperature, and more precise, and has very high reproducibility.

The definition of C, ITS-90:

The first temperature zone for the 0.65K to 5.00K, T90 from the relationship between steam pressure and temperature of 3He and 4He to define.

Second zone 3.0K to NE three-phase point (24.5661K) between T90 helium gas thermometer to define.

Third temperature zone for flat Hengqing three-phase point (13.8033K) to the freezing point of silver (961.78 ℃), T90 is a platinum resistance thermometer to define, it is defined using a set of interpolation to indexing. Silver freezing point (961.78 ℃) temperature region above, T90 is based on Planck's law of radiation to the definition, reproduction apparatus for optical pyrometer.

Two, the classification of the temperature measuring instruments

Measuring instrument for temperature according to the temperature measurement method can be divided into contact and non-contact type two categories. Usually contact type temperature measurement instrument is simple, reliable, high measurement precision; but because the temperature measuring element and the measured media need to be fully heat exchange diamond, need some time to reach thermal equilibrium, so the delay in temperature, and high temperature resistant material constraints, can not be applied to the measurement of high temperature. Non contact type instrument measuring temperature is to measure the temperature by thermal radiation principle, measuring element need not contacted with measured medium, wide temperature range, is not affected by the temperature upper limit, does not destroy the temperature field of the measured object, the reaction speed is fast; but the affected object emissivity, distance measurement, dust and water vapor and other external factors, the measurement error.

The three, sensor

The national standard GB7665-87 of the sensor under the definition is: "to be provided to the feelings of measurement and according to certain rules to convert the signal of the device or devices available, usually composed of sensitive components and conversion components". The sensor is a detection device, can feel the measured information, and can check the sensed information, according to the law must transform into electric signal or other required information in the form of output, in order to satisfy the information transmission, processing, storage, display, record and control requirements. It is the most important link for realizing automatic detection and automatic control.

(a), differ in thousands of ways in modern sensor principle and structure, according to the measurement of specific purpose, measurement object and measuring environment reasonable selection of sensors, is in a certain amount of time the first problem to be solved. When the sensor is determined, the measurement method and equipment with matching can also be determined. The success of the measurement results, to a large extent depends on the sensor is reasonable.

1, according to the measured object and measuring environment determine the sensor types: to carry out a specific measure, we must first consider the principle of the sensor, it can only be determined after analysis of many factors. Because, even if the measure the same physical quantity, there are multiple sensor principle for selection, the principle of a sensor is more appropriate, need according to the characteristics and the sensor is measured using conditions to consider the following problems: the range size; the measured demand volume position on the sensor; measurement of contact or non contact type; extraction method of signal, cable or non contact measurement; sensor sources, are imported or domestically produced, the price can accept, or developed.

2, the sensitivity to the choice: usually, the linear range of the sensor, the sensor's sensitivity to the higher the better, because only the sensitivity is high, and the output signal is measured changes corresponding to more conducive to signal processing. But it is important to note, the sensitivity of the sensor is high, and the outside noise measured independent can easily mix, will be also amplified by the system, affect the measurement accuracy, so the requirements of sensor itself has very high signal to noise ratio, reduce as far as possible from the outside into the factory sorrow signal. The sensitivity of the sensor is directional. When the measured is one-way, but also the direction of higher requirements, should choose the other direction sensor sensitivity to small, if be measured is a multi-dimensional vector, cross sensitivity requires sensor smaller is better.

3, the frequency response characteristics: frequency response of sensors determines the frequency range measured, must be within the allowable frequency range to maintain the measurement conditions without distortion, sensor response actually a certain delay, want to delay the shorter the better. The frequency response of the sensor, signal frequency range can be measured is wide, and affected by the structural characteristics, the mechanical system inertia, because of the low frequency signal sensor can measure low frequency. In dynamic measurement, should according to the characteristics of the signal (stationary random response characteristics, etc.), in order to avoid excessive error.

4, the linear range: the linear range of the sensor is refers to the range of the output is proportional to the input. Theoretically, within this range, the sensitivity to keep constant, linear range of the sensor is wider, its range is bigger, and can guarantee a certain measurement accuracy. In the selection of sensors, when the sensor type is determined first to see its scale meets the requirements. But in fact, none of the sensors can guarantee absolute linear, its linearity is relative. When the required measurement accuracy is relatively low, in a certain range of sensor can be approximately regarded as the linear nonlinear error is smaller, it will bring great convenience to the measurement.

5, the sensor stability: after a period of use, its performance does not change that ability to maintain stability. Factors affecting the long-term stable sensor in addition to the sensor structure, is the main sensor using environment. Therefore, in order to make the sensor has good stability, the sensor must have strong ability to adapt to the environment. Before selecting the sensors, the use of environmental investigation, and according to the specific use of the environment to select suitable sensor, or to take appropriate measures, to reduce the environmental impact of. The long-term use and easily replaced or calibration in the certain requirements of sensor to sensor stability situation, the requirements are more stringent, must be able to withstand a long time test.

6: accuracy, precision is an important performance index of sensor, it is a key part of the measurement accuracy of the measurement system. The sensor precision is high, the price more expensive, therefore, the precision of the sensor as long as it meets the measurement accuracy requirements can be, does not need to be so high, so it can meet the same in many sensor measurement in relatively cheap and simple sensor. If the measurement is qualitative analysis, selection of sensors can be high repeat precision, should not use absolute value with high accuracy; if it is to quantitative analysis, must obtain accurate measurements, need to choose precision can satisfy the requirements of sensor. For some special applications, not to choose the appropriate sensor, is designed and manufactured sensor, the self-made sensors should be used to meet the requirements.

(two) temperature sensor:

1, the thermal resistance: thermal resistor is a temperature detector at low temperature in the area is the most commonly used. Its main feature is the high measurement accuracy, stable performance. The measurement accuracy of platinum thermal resistance is the highest, it is not widely used in industrial measurement, but also be made into standard reference instrument.

The thermal resistance temperature measurement principle and material: thermal resistance temperature measurement is based on the metal conductor resistance value increases with the increase of the temperature of the characteristics for temperature measurement. Thermal resistance is mostly made of metal materials, is currently the most widely used platinum and copper, in addition, has now started to material using rhodium, nickel, manganese and other thermal resistance.

The thermal resistance temperature measurement system composed of the temperature measurement system: thermal resistance in general by the thermal resistance, connecting wires and digital temperature control display. We must pay attention to two points: "thermal resistance and digital temperature control display indexing number must be consistent; in order to eliminate the effect of lead resistance change connection, must take three wire connection."

2: NTC thermistor, thermistor, has the advantages of small size, high precision, fast response speed, stable and reliable, anti ageing, interchangeability, good consistency. Widely used in air conditioning, heating equipment, electronic thermometer, liquid level sensor, automotive electronics, electronic calendar etc..

3: thermocouple, thermocouple is one of the most commonly used temperature sensor industry. Its advantages are:

The high precision of measurement. Thanks to direct contact with the object, it is not influenced by the medium.

The wide measuring range. Commonly used thermocouple from -50~+1600 ℃ can be continuously measured, some special thermocouples with minimum -269 ℃ (such as Jin Tienie chromium), up to +2800 ℃ (such as tungsten rhenium).

It has the advantages of simple structure, easy to use. A thermocouple is usually composed of two different metal wires, and the limitation of size and opening, with protective sleeve, very convenient to use.

(1). The basic principle of thermocouple

The welding of two different material a conductor or semiconductor A and B together, to form a closed circuit. When the two points of attachment conductor A and B are 1 and 2 when the temperature difference between the two, there would produce electromotive force, thus forming a size of the current in the circuit, this phenomenon is called the thermoelectric effect. Thermocouples use this to work.

(2) the thermocouple types.

Thermocouple can be divided into standard and non standard thermocouple thermocouple two categories.

Standard thermocouple refers to the national standard, the relationship between thermal potential and temperature tolerance, and the scale of the uniform standard of thermocouple, that it is matched with the instrumentation available for selection.

Non standard thermocouple in the range of use or magnitude are not standardized thermocouple, in general there is no unified indexing table, is mainly used for measuring some special occasions.

Our country since January 1, 1988, thermocouple and thermal resistance are all according to IEC international standard production, and designated S, B, E, K, R, J, T seven standard thermocouple as a unified design in our country.

(3). The temperature compensation of thermocouple cold end

The thermocouple materials are generally more expensive (especially when using precious metals), and points to the instrument there is quite a long distance, in order to save the thermocouple material, reduce cost, usually by the thermocouple cold end compensating conductor (free end) of the indoor temperature control extends to more stable, connected to the instrument. It must be pointed out, thermocouple wire role is only to extend the thermode, make the cold end of thermocouple to mobile instrument terminal control room, which itself does not eliminate the effect of cold end temperature changes on the temperature, do not play the role of compensation. Therefore, it still needs the other correction method to compensate the cold end temperature of t0 = 0 ℃ temperature effect. In the use of thermocouple wire should be considered when the model match, polarity can not take the wrong, temperature compensation of thermocouple wire and connecting terminal should not exceed 100 ℃.

Progress in the field of eight temperature four, China

Our instrument with international development in achieving the miniaturization, digitization, intelligence, integration and network pace, increasing development and industrialization with independent intellectual property rights of efforts, has made remarkable progress. The major technical advances, it mainly includes the following eight aspects:

1 advanced industrial automation instruments and systems integration and the full digital modular, meets the requirement of industrialization, widely used in the fields of steel, electricity, coal, chemical, oil, transportation, construction, defense, food, medicine, agriculture, environmental protection, with independent intellectual property rights of the direction to take a solid step.

Study 2 intelligent testing instruments and automatic test system and industrialization level is improved by a large margin, set up automatic test system for aerospace testing, mechanical and electrical products, household appliances, test test seismic monitoring, meteorological, environmental monitoring and other industries. The overall level has reached the foreign advanced level of product, and the price was significantly lower than that of foreign products.

3 microwave and millimeter wave vector network analyzer is successfully developed and mass production, symbolized our country become the world America after second can produce such sophisticated apparatus of state.

4 research and development of nanometer measurement and micro instruments have their own characteristics, carbon nanotubes directional preparation and structure and physical properties of detection in the world leading position.

5 complete electrical quantum standard complete and 1.5 × 10-5 national power level standard device, make our country electrical measurement standards in the international advanced level.

6 development of scientific instrument research with independent intellectual property rights, enhance the overall level of scientific instruments in china.

7 to establish the development mechanism of combining production, domestic and foreign combination, broaden the application field of scientific instruments, such as spectral instrument developed successfully the customs anti fake ticket, in the national customs after the promotion, has seized fake tickets worth 54000000000 yuan, for the country to save huge economic loss. Scientific instruments made in China's market share increased from "eight five" to "Nine Five" during the 13% stage of 25%.

The successful development and mass production of 8 high intensity focused ultrasound tumor treatment system, medical ultrasonic instrument of noninvasive therapy on tumors and has the international leading advantage.

A basic concept, temperature measurement

1, the definition of temperature:

Temperature is a physical quantity to describe the degree of hot and cold objects. Some characteristics of temperature only by varying with the temperature of the object to measure indirectly, and used to measure the value of the object temperature scale named scale. It provides the starting point temperature readings (zero) basic unit and temperature measurement. The use of the scale with Fahrenheit, Celsius, thermodynamic temperature scale and international practical temperature scale.

Celsius scale (c) provides that: under standard pressure, the melting point of ice is 0 degrees, the boiling point of water is 100 degrees, the middle is divided into 100 equal parts, each part is 1 degrees Celsius, symbol C.

Fahrenheit (f) provides that: under standard pressure, the melting point of ice is 32 degrees, the boiling point of water is 212 degrees, the middle is divided into 180 equal parts of every part is 1 degrees Fahrenheit symbol F.

Thermodynamic temperature scale (symbol T) also known as the Kelvin scale (symbol K), or absolute scale, it provides molecular motion stops when the temperature of absolute zero.

International practical temperature scale: is an international agreement of the scale, it is close to the thermodynamic temperature scale, and high repetition accuracy, easy to use. The international temperature scale was 1975 Fifteenth International Conference of the "right of international practical temperature scale of 1968 -1975 revised edition", recorded as: IPTS-68 (REV-75). But because the IPTS-68 temperature is not to catch, to the 1989 meeting of the CIPM international ITS-90 authorization in 1990 18 international metering assembly resolution seventh, ITS-90 instead of IPS-68. In China, since January 1, 1994 the full implementation of ITS-90 international temperature scale.

The international temperature scale of 1990:

A, temperature unit: thermodynamic temperature is a basic skill in hand physical quantity, unit Kelvin it, defined as the thermodynamic temperature of the triple point of water 1/273.16, used with the 273.15K (freezing) expressed as a difference of temperature, so it still retains the method. According to the definition, degrees Celsius temperature difference is equal to Kelvin, also available degrees Celsius or Kelvin said. International temperature scale ITS-90 while the definition of international Kelvin temperature (symbol T90) and international Celsius (symbol T90).

General B, the international temperature scale of ITS-90: the highest temperature of ITS-90 by 0.65K up to Planck's law of radiation using monochromatic radiation can actually measure. ITS-90 is formulated in the full range, the best estimate any temperature adopted when the value of T, T90 measurements are much more convenient compared with direct measurements of thermodynamic temperature, and more precise, and has very high reproducibility.

The definition of C, ITS-90:

The first temperature zone for the 0.65K to 5.00K, T90 from the relationship between steam pressure and temperature of 3He and 4He to define.

Second zone 3.0K to NE three-phase point (24.5661K) between T90 helium gas thermometer to define.

Third temperature zone for flat Hengqing three-phase point (13.8033K) to the freezing point of silver (961.78 ℃), T90 is a platinum resistance thermometer to define, it is defined using a set of interpolation to indexing. Silver freezing point (961.78 ℃) temperature region above, T90 is based on Planck's law of radiation to the definition, reproduction apparatus for optical pyrometer.

Two, the classification of the temperature measuring instruments

Measuring instrument for temperature according to the temperature measurement method can be divided into contact and non-contact type two categories. Usually contact type temperature measurement instrument is simple, reliable, high measurement precision; but because the temperature measuring element and the measured media need to be fully heat exchange diamond, need some time to reach thermal equilibrium, so the delay in temperature, and high temperature resistant material constraints, can not be applied to the measurement of high temperature. Non contact type instrument measuring temperature is to measure the temperature by thermal radiation principle, measuring element need not contacted with measured medium, wide temperature range, is not affected by the temperature upper limit, does not destroy the temperature field of the measured object, the reaction speed is fast; but the affected object emissivity, distance measurement, dust and water vapor and other external factors, the measurement error.

The three, sensor

The national standard GB7665-87 of the sensor under the definition is: "to be provided to the feelings of measurement and according to certain rules to convert the signal of the device or devices available, usually composed of sensitive components and conversion components". The sensor is a detection device, can feel the measured information, and can check the sensed information, according to the law must transform into electric signal or other required information in the form of output, in order to satisfy the information transmission, processing, storage, display, record and control requirements. It is the most important link for realizing automatic detection and automatic control.

(a), differ in thousands of ways in modern sensor principle and structure, according to the measurement of specific purpose, measurement object and measuring environment reasonable selection of sensors, is in a certain amount of time the first problem to be solved. When the sensor is determined, the measurement method and equipment with matching can also be determined. The success of the measurement results, to a large extent depends on the sensor is reasonable.

1, according to the measured object and measuring environment determine the sensor types: to carry out a specific measure, we must first consider the principle of the sensor, it can only be determined after analysis of many factors. Because, even if the measure the same physical quantity, there are multiple sensor principle for selection, the principle of a sensor is more appropriate, need according to the characteristics and the sensor is measured using conditions to consider the following problems: the range size; the measured demand volume position on the sensor; measurement of contact or non contact type; extraction method of signal, cable or non contact measurement; sensor sources, are imported or domestically produced, the price can accept, or developed.

2, the sensitivity to the choice: usually, the linear range of the sensor, the sensor's sensitivity to the higher the better, because only the sensitivity is high, and the output signal is measured changes corresponding to more conducive to signal processing. But it is important to note, the sensitivity of the sensor is high, and the outside noise measured independent can easily mix, will be also amplified by the system, affect the measurement accuracy, so the requirements of sensor itself has very high signal to noise ratio, reduce as far as possible from the outside into the factory sorrow signal. The sensitivity of the sensor is directional. When the measured is one-way, but also the direction of higher requirements, should choose the other direction sensor sensitivity to small, if be measured is a multi-dimensional vector, cross sensitivity requires sensor smaller is better.

3, the frequency response characteristics: frequency response of sensors determines the frequency range measured, must be within the allowable frequency range to maintain the measurement conditions without distortion, sensor response actually a certain delay, want to delay the shorter the better. The frequency response of the sensor, signal frequency range can be measured is wide, and affected by the structural characteristics, the mechanical system inertia, because of the low frequency signal sensor can measure low frequency. In dynamic measurement, should according to the characteristics of the signal (stationary random response characteristics, etc.), in order to avoid excessive error.

4, the linear range: the linear range of the sensor is refers to the range of the output is proportional to the input. Theoretically, within this range, the sensitivity to keep constant, linear range of the sensor is wider, its range is bigger, and can guarantee a certain measurement accuracy. In the selection of sensors, when the sensor type is determined first to see its scale meets the requirements. But in fact, none of the sensors can guarantee absolute linear, its linearity is relative. When the required measurement accuracy is relatively low, in a certain range of sensor can be approximately regarded as the linear nonlinear error is smaller, it will bring great convenience to the measurement.

5, the sensor stability: after a period of use, its performance does not change that ability to maintain stability. Factors affecting the long-term stable sensor in addition to the sensor structure, is the main sensor using environment. Therefore, in order to make the sensor has good stability, the sensor must have strong ability to adapt to the environment. Before selecting the sensors, the use of environmental investigation, and according to the specific use of the environment to select suitable sensor, or to take appropriate measures, to reduce the environmental impact of. The long-term use and easily replaced or calibration in the certain requirements of sensor to sensor stability situation, the requirements are more stringent, must be able to withstand a long time test.

6: accuracy, precision is an important performance index of sensor, it is a key part of the measurement accuracy of the measurement system. The sensor precision is high, the price more expensive, therefore, the precision of the sensor as long as it meets the measurement accuracy requirements can be, does not need to be so high, so it can meet the same in many sensor measurement in relatively cheap and simple sensor. If the measurement is qualitative analysis, selection of sensors can be high repeat precision, should not use absolute value with high accuracy; if it is to quantitative analysis, must obtain accurate measurements, need to choose precision can satisfy the requirements of sensor. For some special applications, not to choose the appropriate sensor, is designed and manufactured sensor, the self-made sensors should be used to meet the requirements.

(two) temperature sensor:

1, the thermal resistance: thermal resistor is a temperature detector at low temperature in the area is the most commonly used. Its main feature is the high measurement accuracy, stable performance. The measurement accuracy of platinum thermal resistance is the highest, it is not widely used in industrial measurement, but also be made into standard reference instrument.

The thermal resistance temperature measurement principle and material: thermal resistance temperature measurement is based on the metal conductor resistance value increases with the increase of the temperature of the characteristics for temperature measurement. Thermal resistance is mostly made of metal materials, is currently the most widely used platinum and copper, in addition, has now started to material using rhodium, nickel, manganese and other thermal resistance.

The thermal resistance temperature measurement system composed of the temperature measurement system: thermal resistance in general by the thermal resistance, connecting wires and digital temperature control display. We must pay attention to two points: "thermal resistance and digital temperature control display indexing number must be consistent; in order to eliminate the effect of lead resistance change connection, must take three wire connection."

2: NTC thermistor, thermistor, has the advantages of small size, high precision, fast response speed, stable and reliable, anti ageing, interchangeability, good consistency. Widely used in air conditioning, heating equipment, electronic thermometer, liquid level sensor, automotive electronics, electronic calendar etc..

3: thermocouple, thermocouple is one of the most commonly used temperature sensor industry. Its advantages are:

The high precision of measurement. Thanks to direct contact with the object, it is not influenced by the medium.

The wide measuring range. Commonly used thermocouple from -50~+1600 ℃ can be continuously measured, some special thermocouples with minimum -269 ℃ (such as Jin Tienie chromium), up to +2800 ℃ (such as tungsten rhenium).

It has the advantages of simple structure, easy to use. A thermocouple is usually composed of two different metal wires, and the limitation of size and opening, with protective sleeve, very convenient to use.

(1). The basic principle of thermocouple

The welding of two different material a conductor or semiconductor A and B together, to form a closed circuit. When the two points of attachment conductor A and B are 1 and 2 when the temperature difference between the two, there would produce electromotive force, thus forming a size of the current in the circuit, this phenomenon is called the thermoelectric effect. Thermocouples use this to work.

(2) the thermocouple types.

Thermocouple can be divided into standard and non standard thermocouple thermocouple two categories.

Standard thermocouple refers to the national standard, the relationship between thermal potential and temperature tolerance, and the scale of the uniform standard of thermocouple, that it is matched with the instrumentation available for selection.

Non standard thermocouple in the range of use or magnitude are not standardized thermocouple, in general there is no unified indexing table, is mainly used for measuring some special occasions.

Our country since January 1, 1988, thermocouple and thermal resistance are all according to IEC international standard production, and designated S, B, E, K, R, J, T seven standard thermocouple as a unified design in our country.

(3). The temperature compensation of thermocouple cold end

The thermocouple materials are generally more expensive (especially when using precious metals), and points to the instrument there is quite a long distance, in order to save the thermocouple material, reduce cost, usually by the thermocouple cold end compensating conductor (free end) of the indoor temperature control extends to more stable, connected to the instrument. It must be pointed out, thermocouple wire role is only to extend the thermode, make the cold end of thermocouple to mobile instrument terminal control room, which itself does not eliminate the effect of cold end temperature changes on the temperature, do not play the role of compensation. Therefore, it still needs the other correction method to compensate the cold end temperature of t0 = 0 ℃ temperature effect. In the use of thermocouple wire should be considered when the model match, polarity can not take the wrong, temperature compensation of thermocouple wire and connecting terminal should not exceed 100 ℃.

Progress in the field of eight temperature four, China

Our instrument with international development in achieving the miniaturization, digitization, intelligence, integration and network pace, increasing development and industrialization with independent intellectual property rights of efforts, has made remarkable progress. The major technical advances, it mainly includes the following eight aspects:

1 advanced industrial automation instruments and systems integration and the full digital modular, meets the requirement of industrialization, widely used in the fields of steel, electricity, coal, chemical, oil, transportation, construction, defense, food, medicine, agriculture, environmental protection, with independent intellectual property rights of the direction to take a solid step.

Study 2 intelligent testing instruments and automatic test system and industrialization level is improved by a large margin, set up automatic test system for aerospace testing, mechanical and electrical products, household appliances, test test seismic monitoring, meteorological, environmental monitoring and other industries. The overall level has reached the foreign advanced level of product, and the price was significantly lower than that of foreign products.

3 microwave and millimeter wave vector network analyzer is successfully developed and mass production, symbolized our country become the world America after second can produce such sophisticated apparatus of state.

4 research and development of nanometer measurement and micro instruments have their own characteristics, carbon nanotubes directional preparation and structure and physical properties of detection in the world leading position.

5 complete electrical quantum standard complete and 1.5 × 10-5 national power level standard device, make our country electrical measurement standards in the international advanced level.

6 development of scientific instrument research with independent intellectual property rights, enhance the overall level of scientific instruments in china.

7 to establish the development mechanism of combining production, domestic and foreign combination, broaden the application field of scientific instruments, such as spectral instrument developed successfully the customs anti fake ticket, in the national customs after the promotion, has seized fake tickets worth 54000000000 yuan, for the country to save huge economic loss. Scientific instruments made in China's market share increased from "eight five" to "Nine Five" during the 13% stage of 25%.

The successful development and mass production of 8 high intensity focused ultrasound tumor treatment system, medical ultrasonic instrument of noninvasive therapy on tumors and has the international leading advantage.


 Links:Shenzhen Kemin Sensor Co.,Ltd    Shenzhen Kemin Sensitive Components Co.,Ltd    Hangzhou Kemeit Sensor Co.,Ltd    NanJing Kemin Sensor Co.,Ltd    Shenzhen Kemin Institute Sensitive Components    YongKe(Hong Kong) Co.,Ltd
Copyright @ 2013 Shenzhen Kemin Sensor Co.,Ltd. AllRight Reserved
Tel:86 755 27308212/27307702/27308249/27307589 Fax:86 755 27307986