CN108362387A - The thermopile infrared sensor of environment temperature calibration-free - Google Patents
The thermopile infrared sensor of environment temperature calibration-free Download PDFInfo
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- CN108362387A CN108362387A CN201710057234.3A CN201710057234A CN108362387A CN 108362387 A CN108362387 A CN 108362387A CN 201710057234 A CN201710057234 A CN 201710057234A CN 108362387 A CN108362387 A CN 108362387A
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- thermistor
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- pedestal
- environment temperature
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 43
- 238000000034 method Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 238000005476 soldering Methods 0.000 claims description 5
- 238000009966 trimming Methods 0.000 claims description 4
- 238000005259 measurement Methods 0.000 abstract description 15
- 230000008901 benefit Effects 0.000 abstract description 8
- 230000005611 electricity Effects 0.000 description 7
- 238000009529 body temperature measurement Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 230000005619 thermoelectricity Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 206010011409 Cross infection Diseases 0.000 description 1
- 206010029803 Nosocomial infection Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
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- 239000000523 sample Substances 0.000 description 1
- 210000000352 storage cell Anatomy 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
- G01J5/12—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors using thermoelectric elements, e.g. thermocouples
- G01J5/14—Electrical features thereof
- G01J5/16—Arrangements with respect to the cold junction; Compensating influence of ambient temperature or other variables
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/10—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors
- G01J5/20—Radiation pyrometry, e.g. infrared or optical thermometry using electric radiation detectors using resistors, thermistors or semiconductors sensitive to radiation, e.g. photoconductive devices
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Radiation Pyrometers (AREA)
Abstract
The present invention provides a kind of thermopile infrared sensor of environment temperature calibration-free, and the thermopile infrared sensor of the environment temperature calibration-free includes：Thermopile infrared sensor chip；Thermistor；Thermistor matching resistor, the resistance value of the thermistor matching resistor are identical as the resistance value of the thermistor under identical temperature condition.The thermopile infrared sensor of the environment temperature calibration-free of the present invention is by adding the thermistor matching resistor matched with thermistor, it can not have to that thermistor calibrate during use accurate measurement can be realized, the reliability for improving device has the advantages that easy to use, cost-effective.
Description
Technical field
The invention belongs to infrared sensor technical fields, more particularly to a kind of thermopile IR of environment temperature calibration-free
Sensor.
Background technology
It is well known that all in nature are not stopping outside radiation energy higher than the object of absolute zero, object to
The size of external radiation energy and its by wavelength distribution with its surface temperature have it is very close contact, the temperature of object is got over
Height, the infra-red radiation ability sent out is stronger, therefore infrared measurement of temperature is with a wide range of applications.Infrared temperature-test technology is producing
Process monitoring, in control of product quality and monitoring, equipment on-line fault diagnosis and safeguard protection and it is energy saving etc. all
Important function is played.Compared with contact temperature-measuring method, infrared measurement of temperature have the response time it is fast, it is non-contact, safe to use and
The advantages that service life is long.In recent years, to avoid pollution and cross-infection of the mercury clinical thermometer to environment, non-contacting infrared human body
Temperature measurer is technically also rapidly developed, and performance constantly improve, function constantly enhances, and kind is on the increase, the scope of application
Also constantly expand.Infrared energy is converted into electric signal output by thermal infrared sensor, is the core of infrared temperature-test technology
Part.
The basic principle of infrared measurement of temperature is infra-red radiation law：
Ε=σ ε (Tobj4-Tamb4)
In formula, E is ir radiant power density, and σ is Stefan-Boltzmann constant, and ε is the infrared emittance of object,
Tobj is the temperature of infrared radiating object, and unit K, Tamb are the environment temperature around object, unit K.Therefore, infrared survey
The infrared signal that middle benefit gas infrared sensor measures is difference signals.To measure the temperature of infrared target, it is necessary to by sensor ring
Border temperature substitutes into the compensation that calculation formula carries out environment temperature, and sensor will have a direct impact on the measurement accuracy of circumstance temperature temperature
Infrared measurement of temperature result.
As shown in Figure 1, the thermopile infrared sensor applied to infrared measurement of temperature is typically all by thermistor and thermoelectric pile
Sensor is packaged together, including：Pedestal 15；Thermistor 11 and thermopile IR positioned at 15 upper surface of the pedestal sense
Device chip 12；Positioned at 15 upper surface of the pedestal, and it is packaged in the thermistor 11 and the thermopile infrared sensor core
The pipe cap 14 of 12 periphery of piece, 14 top of the pipe cap are equipped with through-hole；Infrared Lens 13 are fixed on the pipe cap 14 and cover completely
Cover the through-hole；Base pin 16, one end are extended to via the bottom of the pedestal 15 above the upper surface of the pedestal 15, institute
State thermistor 11 by bonding wire 17 be wherein connected with the base pin 16, the thermopile infrared sensor chip 12
It is connected with the pedestal 15 and another base pin 16 by bonding wire 17.Wherein, the thermopile infrared sensor core
Piece 12 is used to measure infrared intensity, measures the temperature difference of target object and environment temperature, and the thermistor 11 is then straight
Measuring environment temperature is connect, the compensation of environment temperature is used for.It is existing since error can be introduced in 11 encapsulation process of the thermistor
The precision of the thermistor 11 of infrared measurement of temperature generally is ± 3%~± 5%.Therefore it is used in thermopile infrared sensor
In the process, it is required for calibrating the thermistor 11, to improve measurement of the thermopile infrared sensor to environment temperature
Precision.To carry out accurate alignment to the thermistor 11, need the infrared probe of infrared measurement of temperature being partially immersed in constant temperature ring
In border, needs to wait long and the thermistor 11 is calibrated with obtaining stationary temperature environment, environment temperature is caused to calibrate
Difficulty is big and prover time is long.In addition, during sensor use, generally can assembling structure part on a sensor, to make
When at environment temperature correction, there are temperature gradients for the temperature and structural member of sensor so that the calibration of the thermistor 11 is inaccurate
Really.And the thermistor 11 is calibrated and inaccurate further causes ambient temperature measurement low precision, infrared measurement of temperature error big.
By integrated thermal electric heap sensor chip and temperature measurement circuit chip, sensor is demarcated into environment temperature before manufacture,
And environment temperature calibration result is stored on temperature measurement circuit chip, it can also realize environment temperature in infrared sensor practical application
Calibration-free.But temperature measurement circuit chip needs to increase storage unit with storage environment temperature calibration as a result, increasing device cost.And
And there is the risk of storage loss of data in data storage cell, reduce the reliability of sensor.
Invention content
In view of the foregoing deficiencies of prior art, the purpose of the present invention is to provide a kind of heat of environment temperature calibration-free
Pile infrared sensor is needed before use existing for thermopile infrared sensor in the prior art for solving to temperature-sensitive electricity
Resistance is calibrated, and calibration difficulty is big, time-consuming, and calibration accuracy is poor, so that the problem of measurement accuracy difference.
In order to achieve the above objects and other related objects, the present invention provides a kind of thermopile IR of environment temperature calibration-free
The thermopile infrared sensor of sensor, the environment temperature calibration-free includes：
Thermopile infrared sensor chip；
Thermistor；
Thermistor matching resistor, the resistance value of the thermistor matching resistor and the temperature-sensitive under identical temperature condition
The resistance value of resistance is identical.
A kind of preferred embodiment of the thermopile infrared sensor of environment temperature calibration-free as the present invention, the temperature-sensitive electricity
Resistance top is equipped with thermal conductivity material clad.
A kind of preferred embodiment of the thermopile infrared sensor of environment temperature calibration-free as the present invention, the environment temperature
Degree calibration-free thermopile infrared sensor further include：
Pedestal；The thermopile infrared sensor chip and the thermistor are respectively positioned on the upper surface of the pedestal, and
The thermopile infrared sensor chip is mutually separated with spacing with the thermistor；
Pipe cap is covered in the base top, and is located at the thermopile infrared sensor chip and the thermistor
Periphery；The top of the pipe cap is equipped with through-hole；
Infrared Lens are fixed on the pipe cap, and the through-hole is completely covered.
A kind of preferred embodiment of the thermopile infrared sensor of environment temperature calibration-free as the present invention, the environment temperature
The thermopile infrared sensor for spending calibration-free further includes several base pins, and described base pin one end is from the bottom of the pedestal
Portion extends to the over top of the pedestal；One electrode pin of the thermistor passes through bonding wire and a base pin phase
Connection, another electrode pin are connected by bonding wire with the pedestal；One electrode of the thermopile infrared sensor chip draws
Foot is connected by bonding wire with another base pin, and another electrode pin is connected by bonding wire with the pedestal.
A kind of preferred embodiment of the thermopile infrared sensor of environment temperature calibration-free as the present invention, the temperature-sensitive electricity
Resistance matching resistor is located at the upper surface of the pedestal, and on the inside of the pipe cap.
A kind of preferred embodiment of the thermopile infrared sensor of environment temperature calibration-free as the present invention, the temperature-sensitive electricity
Resistance is the thermistor after being adjusted to its size using laser resistor trimming technique, resistance of the thermistor under fixed temperature
Value measures before the pedestal and the pipe cap soldering and sealing.
A kind of preferred embodiment of the thermopile infrared sensor of environment temperature calibration-free as the present invention, the temperature-sensitive electricity
Resistance matching resistor is located at the lower section of the pedestal or the outside positioned at the top of the pedestal and positioned at the pipe cap.
As described above, the thermopile infrared sensor of the environment temperature calibration-free of the present invention, has the advantages that：This
The thermopile infrared sensor of the environment temperature calibration-free of invention is matched by adding the thermistor matched with thermistor
To resistance, it can not have to that thermistor calibrate during use accurate measurement can be realized, improve device
Reliability has the advantages that easy to use, cost-effective.
Description of the drawings
Fig. 1 is shown as the cross section structure schematic diagram of thermopile infrared sensor in the prior art.
Fig. 2 and Fig. 3 is shown as the cross section structure schematic diagram of the thermopile infrared sensor of environment temperature calibration-free of the present invention；
Wherein, thermistor matching resistor and thermistor are packaged on same pedestal in Fig. 2, in Fig. 3 thermistor matching resistor with
Thermistor is separately individually encapsulated.
Component label instructions
11 quick resistance
12 thermopile infrared sensor chips
13 Infrared Lens
14 pipe caps
15 pedestals
16 base pins
17 bonding wires
21 thermistors
22 thermopile infrared sensor chips
23 Infrared Lens
24 pipe caps
25 pedestals
26 base pins
27 bonding wires
28 thermistor matching resistors
29 heat-conducting glues
Specific implementation mode
Illustrate that embodiments of the present invention, those skilled in the art can be by this specification below by way of specific specific example
Disclosed content understands other advantages and effect of the present invention easily.The present invention can also pass through in addition different specific realities
The mode of applying is embodied or practiced, the various details in this specification can also be based on different viewpoints with application, without departing from
Various modifications or alterations are carried out under the spirit of the present invention.
Please refer to Fig. 2 and Fig. 3.It should be noted that the diagram provided in the present embodiment only illustrates this in a schematic way
The basic conception of invention, though package count when only display is with related component in the present invention rather than according to actual implementation in diagram
Mesh, shape and size are drawn, when actual implementation form, quantity and the ratio of each component can be a kind of random change, and its
Assembly layout form may also be increasingly complex.
Referring to Fig. 2, the present invention provides a kind of thermopile infrared sensor of environment temperature calibration-free, the environment temperature
The thermopile infrared sensor of calibration-free includes：Thermopile infrared sensor chip 22；Thermistor 21；Thermistor pairing electricity
Resistance 28, the resistance value of the thermistor matching resistor 28 is identical as the resistance value of the thermistor 21 under identical temperature condition.
The thermopile infrared sensor of the environment temperature calibration-free of the present invention is by adding the institute matched with the thermistor 21
State thermistor matching resistor 28, and the resistance value of the thermistor matching resistor 28 and the temperature-sensitive under identical temperature condition
The resistance value of resistance 21 is identical, can not have to calibrate the thermistor 21 during use, need to only measure described
The resistance value of thermistor matching resistor 28 may know that resistance value of the thermistor 21 under corresponding temperature, accurate to realize
It measures, improves the reliability of device, have the advantages that easy to use, cost-effective.
It should be noted that the thermistor 21 corresponds to the resistance value under different temperatures, test obtains in advance, i.e. root
According to the resistance value of the thermistor 21, you can learn the temperature corresponding to the resistance value, i.e., environment temperature at this time.
As an example, 21 top of the thermistor is equipped with thermal conductivity material clad, it is preferable that the thermal conductivity
Material clad can be but be not limited only to conducting resinl.
As an example, the thermopile infrared sensor of the environment temperature calibration-free further includes：Pedestal 25；The thermoelectric pile
Infrared sensor chip 22 and the thermistor 21 are respectively positioned on the upper surface of the pedestal 25, and the thermopile IR senses
Device chip 22 is separated with spacing with 21 phase of the thermistor；Pipe cap 24, it is described；Pipe cap 24 is covered in 25 top of the pedestal, and
Positioned at the periphery of the thermopile infrared sensor chip 22 and the thermistor 21；The top of the pipe cap 25 is equipped with logical
Hole；Infrared Lens 23, the Infrared Lens 23 are fixed on the pipe cap 24, and the through-hole is completely covered.
As an example, the thermopile infrared sensor of the environment temperature calibration-free further includes several base pins 26,
26 one end of the base pin extends to the over top of the pedestal 25 from the bottom of the pedestal 25；The thermistor 21
An electrode pin (not shown) be connected with a base pin 26 by bonding wire 27, another electrode pin (not shown) is logical
Bonding wire 27 is crossed with the pedestal 25 to be connected；One electrode pin (not shown) of the thermopile infrared sensor chip 22 passes through
Bonding wire 27 is connected with another base pin 26, and another electrode pin (not shown) passes through bonding wire 27 and 25 phase of the pedestal
Connection.An electrode pin and the thermoelectricity for the thermistor 21 to an electrode pin of infrared sensor chip 22 and institute
It states pedestal 25 to be connected, the short circuit of the thermistor 21 and the infrared sensor chip 22 may be implemented；The temperature-sensitive electricity
Another electrode pin and the thermoelectricity of resistance 21 to another electrode pin of infrared sensor 22 with 26 phase of the base pin
Connection, can make the thermistor 21 be consistent to the temperature of infrared sensor 22 with the thermoelectricity.
It should be noted that when the thermistor 21 is connected by the bonding wire 27 with the base pin 26,
It needs to form solder joint (not shown) in order to connect, at this point, the conducting resinl is coated on institute at the top of the thermistor 21
The periphery for stating solder joint, to reduce the temperature difference of 21 top and bottom of the thermistor, to realize the thermistor 21 to ring
The accurate measurement of border temperature.
In one example, as shown in Fig. 2, thermistor matching resistor 28 is located at the upper surface of the pedestal 25, and it is located at
24 inside of the pipe cap, i.e., the described thermistor matching resistor 28 are packaged in the thermistor 21 on same pedestal.At this point,
The thermistor 21 is the thermistor after being adjusted to its size using the methods of laser resistor trimming technique, by described
The size of thermistor 21 carries out laser resistor trimming, can accurately control the resistance value of the thermistor 21.Certainly, in other examples
In, it can also realize accurately controlling for the resistance value of the thermistor 21 by the way that the material of the thermistor 21 is arranged.Institute
Resistance value of the thermistor 21 under fixed temperature is stated to measure before the pedestal 25 and 24 soldering and sealing of the pipe cap.
In another example, thermistor matching resistor 28 is located at the lower section of the pedestal 25 or positioned at the pedestal 25
Top and the outside for being located at the pipe cap 24, i.e., the described thermistor matching resistor 28 and the thermistor 21 separate independent envelope
Dress.As shown in figure 3, the tube socket can be fixed on when the thermistor matching resistor 28 is located at the lower section of the pedestal 25
On pin 26.At this point, without controlling the size of the thermistor 21, the thermistor 21 is under fixed temperature
Resistance value can measure after the pedestal 25 and 24 soldering and sealing of the pipe cap, it is of course also possible in the pedestal 25 and the pipe cap
It is measured after 24 soldering and sealing.
In conclusion the present invention provides a kind of thermopile infrared sensor of environment temperature calibration-free, the environment temperature
The thermopile infrared sensor of calibration-free includes：Thermopile infrared sensor chip；Thermistor；Thermistor matching resistor,
The resistance value of the thermistor matching resistor is identical as the resistance value of the thermistor under identical temperature condition.The institute of the present invention
The thermopile infrared sensor of environment temperature calibration-free is stated by adding the thermistor matching resistor matched with thermistor,
It can not have to that thermistor calibrate during use accurate measurement can be realized, improve the reliability of device, have
Have the advantages that easy to use, cost-effective.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.It is any ripe
The personage for knowing this technology can all carry out modifications and changes to above-described embodiment without violating the spirit and scope of the present invention.Cause
This, institute is complete without departing from the spirit and technical ideas disclosed in the present invention by those of ordinary skill in the art such as
At all equivalent modifications or change, should by the present invention claim be covered.
Claims (7)
1. a kind of thermopile infrared sensor of environment temperature calibration-free, which is characterized in that the heat of the environment temperature calibration-free
Pile infrared sensor includes：
Thermopile infrared sensor chip；
Thermistor；
Thermistor matching resistor, the resistance value of the thermistor matching resistor and the thermistor under identical temperature condition
Resistance value it is identical.
2. the thermopile infrared sensor of environment temperature calibration-free according to claim 1, it is characterised in that：The temperature-sensitive
Top Resistance is equipped with thermal conductivity material clad.
3. the thermopile infrared sensor of environment temperature calibration-free according to claim 1 or 2, it is characterised in that：It is described
The thermopile infrared sensor of environment temperature calibration-free further includes：
Pedestal；The thermopile infrared sensor chip and the thermistor are respectively positioned on the upper surface of the pedestal, and described
Thermopile infrared sensor chip is mutually separated with spacing with the thermistor；
Pipe cap, is covered in the base top, and positioned at the outer of the thermopile infrared sensor chip and the thermistor
It encloses；The top of the pipe cap is equipped with through-hole；
Infrared Lens are fixed on the pipe cap, and the through-hole is completely covered.
4. the thermopile infrared sensor of environment temperature calibration-free according to claim 3, it is characterised in that：The environment
The thermopile infrared sensor of temperature calibration-free further includes several base pins, and described base pin one end is from the pedestal
Bottom extends to the over top of the pedestal；One electrode pin of the thermistor passes through bonding wire and a base pin
It is connected, another electrode pin is connected by bonding wire with the pedestal；One electrode of the thermopile infrared sensor chip
Pin is connected by bonding wire with another base pin, and another electrode pin is connected by bonding wire with the pedestal.
5. the thermopile infrared sensor of environment temperature calibration-free according to claim 4, it is characterised in that：The temperature-sensitive
Resistance matching resistor is located at the upper surface of the pedestal, and on the inside of the pipe cap.
6. the thermopile infrared sensor of environment temperature calibration-free according to claim 5, it is characterised in that：The temperature-sensitive
Resistance is the thermistor after being adjusted to its size using laser resistor trimming technique, and the thermistor hinders under fixed temperature
Value measures before the pedestal and the pipe cap soldering and sealing.
7. the thermopile infrared sensor of environment temperature calibration-free according to claim 6, it is characterised in that：The temperature-sensitive
Resistance matching resistor is located at the lower section of the pedestal or the outside positioned at the top of the pedestal and positioned at the pipe cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710057234.3A CN108362387A (en) | 2017-01-26 | 2017-01-26 | The thermopile infrared sensor of environment temperature calibration-free |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710057234.3A CN108362387A (en) | 2017-01-26 | 2017-01-26 | The thermopile infrared sensor of environment temperature calibration-free |
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| CN108362387A true CN108362387A (en) | 2018-08-03 |
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Cited By (5)
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| CN110398290A (en) * | 2019-09-02 | 2019-11-01 | 上海商皓电子科技有限公司 | Self-constant temperature infrared temperature sensor and the product for applying it |
| CN110974703A (en) * | 2019-12-31 | 2020-04-10 | 浙江智慧照明技术有限公司 | Biological clock-based medicine taking reminding device |
| CN111504476A (en) * | 2019-01-31 | 2020-08-07 | 众智光电科技股份有限公司 | Infrared temperature sensor |
| CN113588098A (en) * | 2021-07-29 | 2021-11-02 | 济南博观智能科技有限公司 | Infrared thermopile array self temperature drift compensation method and related components |
| CN114518467A (en) * | 2020-11-19 | 2022-05-20 | 上海星钰科技有限公司 | Ambient temperature self-calibration infrared sensor |
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| CN110974703A (en) * | 2019-12-31 | 2020-04-10 | 浙江智慧照明技术有限公司 | Biological clock-based medicine taking reminding device |
| CN114518467A (en) * | 2020-11-19 | 2022-05-20 | 上海星钰科技有限公司 | Ambient temperature self-calibration infrared sensor |
| CN113588098A (en) * | 2021-07-29 | 2021-11-02 | 济南博观智能科技有限公司 | Infrared thermopile array self temperature drift compensation method and related components |
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