CN109186781A - A kind of non-contact temperature measuring device based on thermistor - Google Patents
A kind of non-contact temperature measuring device based on thermistor Download PDFInfo
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- CN109186781A CN109186781A CN201810827340.XA CN201810827340A CN109186781A CN 109186781 A CN109186781 A CN 109186781A CN 201810827340 A CN201810827340 A CN 201810827340A CN 109186781 A CN109186781 A CN 109186781A
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- thermistor
- metallic conduction
- conduction plate
- resistance
- temperature
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- 230000008859 change Effects 0.000 claims abstract description 16
- 239000013078 crystal Substances 0.000 claims abstract description 16
- 238000012544 monitoring process Methods 0.000 claims abstract description 6
- 239000000919 ceramic Substances 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims description 2
- 230000004044 response Effects 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 description 4
- 238000009529 body temperature measurement Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 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
- G01J5/20—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)
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The invention discloses a kind of non-contact temperature measuring devices based on thermistor, including laser, half-reflecting half mirror, electro-optic crystal, the first metallic conduction plate, the second metallic conduction plate, reflecting mirror, resistance, thermistor, supply port, grounding ports, optics phase discriminator.When temperature leads to thermistor change in resistance, the voltage at thermistor both ends changes therewith, so that the voltage between the first metallic conduction plate and the second metallic conduction plate changes, the magnetic field strength generated between two metallic conduction plates also changes therewith, the refractive index of electro-optic crystal is caused to change, to change the phase of reflection laser；The phase change for passing through optics phase discriminator real-time monitoring again, can be obtained the temperature value of thermistor institute paving location.Present system design is unique, can effectively detect the temperature of thermistor institute paving location, has many advantages, such as that precision is high, response is fast and dynamic range is big.
Description
Technical field
The present invention provides a kind of non-contact temperature measuring device more particularly to a kind of contactless surveys based on thermistor
Warm device.
Background technique
Non-contact temperature measuring device based on optical system is the main flow direction of contactless temperature-measuring technical field, is connect Ru non-
Touch infrared temperature measurement system, but the system haves the shortcomings that measurement environment is limited and precision is not high；For another example it is based on optical interference
The non-contact temperature measuring device of principle, but the system debug required precision is high, haves the shortcomings that practical operation requirement is too high.
Thermistor includes the resistor with variable resistance based on temperature.Therefore, thermistor can be embodied in temperature
It spends in sensor.Specifically, the temperature sensor based on thermistor may be more other than such as resistance temperature detector (RTD)
Temperature sensor is more accurate.Thermistor further may include negative temperature coefficient (NTC) thermistor and positive temperature coefficient (PTC)
Thermistor.More specifically, when the temperature increases, the resistance value of NTC thermistor reduces, and the resistance value of PTC thermistor increases.
Summary of the invention
In order to overcome defect existing for above-mentioned technology or deficiency, propose here a kind of based on the contactless of thermistor
Temperature measuring equipment can effectively detect the temperature of thermistor institute paving location by simple optical system, high with precision,
The advantages that response is fast and dynamic range is big.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of non-contact temperature measuring device based on thermistor, it is characterised in that: including laser, half-reflecting half mirror,
Electro-optic crystal, the first metallic conduction plate, the second metallic conduction plate, reflecting mirror, the first connecting wire, the second connecting wire, resistance,
Thermistor, supply port, grounding ports and optics phase discriminator；
The laser generates beam of laser and, into electro-optic crystal, is reflected back on the mirror after half-reflecting half mirror
Half-reflecting half mirror, reflection laser enter optics phase discriminator, the phase of optics phase discriminator real-time monitoring laser after half-reflecting half mirror
Position；
The electro-optic crystal refractive index is directly proportional to the magnetic field strength that it is born；
The first metallic conduction plate is parallel to each other with the second metallic conduction plate；
First connecting wire, the second connecting wire one end connect respectively with the thermistor both ends, the other end
It is connect respectively with the first metallic conduction plate, the second metallic conduction plate；
The resistance is fixed resistance value resistance；
The thermistor resistance value changes with variation of ambient temperature；
Constant supply voltage is provided between the supply port and grounding ports, when temperature leads to thermistor resistance value
When variation, the voltage at thermistor both ends changes therewith, so that between the first metallic conduction plate and the second metallic conduction plate
Voltage change, since the magnetic field strength that the first parallel metallic conduction plate is generated with the second metallic conduction plate is also sent out therewith
Changing, the variation of magnetic field strength can change the refractive index of electro-optic crystal, to change the phase of reflection laser, then pass through optics
The temperature value of thermistor institute paving location can be obtained in the phase change of phase discriminator real-time monitoring.
Further, the thermistor includes negative temperature coefficient (NTC) thermistor or positive temperature coefficient (PTC) temperature-sensitive
Resistance, and wherein the thermistor includes the thermistor based on semiconductor, the thermistor based on ceramics or is based on poly-
Close the thermistor of object.
Because the invention adopts the above technical scheme, have it is following the utility model has the advantages that
One, the temperature of thermistor institute paving location can be effectively detected using simple structure, and there is precision height, ring
The advantages that answering fast and dynamic range big；
Two, using simple optical system, debugging is simple；
Three, the proportional relation of electro-optic crystal refractive index and magnetic field strength has dexterously been used.
Detailed description of the invention
Fig. 1 is principle of the invention figure.
In figure: 1- laser, 2- half-reflecting half mirror, 3- electro-optic crystal, 4- the first metallic conduction plate, the second metallic conduction of 5-
Plate, 6- reflecting mirror, the first connecting wire of 7-, the second connecting wire of 8-, 9- resistance, 10- thermistor, 11- supply port, 12-
Grounding ports, 13- optics phase discriminator.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.As long as in addition, technical characteristic involved in the various embodiments of the present invention described below
Not constituting a conflict with each other can be combined with each other.
A kind of non-contact temperature measuring device based on thermistor, as shown in Figure 1, it is characterized by comprising laser 1,
Half-reflecting half mirror 2, electro-optic crystal 3, the first metallic conduction plate 4, the second metallic conduction plate 5, reflecting mirror 6, the first connecting wire 7,
Second connecting wire 8, resistance 9, thermistor 10, supply port 11, grounding ports 12 and optics phase discriminator 13；
The laser 1 generates beam of laser, anti-on reflecting mirror 6 into electro-optic crystal 3 after half-reflecting half mirror 2
It is emitted back towards half-reflecting half mirror 2, reflection laser enters optics phase discriminator 13 after half-reflecting half mirror 2, and optics phase discriminator 13 is supervised in real time
Survey the phase of laser；
3 refractive index of electro-optic crystal is directly proportional to the magnetic field strength that it is born；
The first metallic conduction plate 4 is parallel to each other with the second metallic conduction plate 5；
First connecting wire 7, the second connecting wire 8 one end connect respectively with 10 both ends of thermistor, separately
One end is connect with the first metallic conduction plate 4, the second metallic conduction plate 5 respectively；
The resistance 9 is fixed resistance value resistance, such as 10K Ω；
10 resistance value of thermistor changes with variation of ambient temperature, and the thermistor 10 can be negative temperature coefficient
(NTC) thermistor or positive temperature coefficient (PTC) thermistor, and wherein the thermistor 10 can be for based on semiconductor
Thermistor, based on ceramics thermistor or based on the thermistor of polymer.
Constant supply voltage, such as 220V are provided between the supply port 11 and grounding ports 12, when temperature causes
When 10 change in resistance of thermistor, the voltage at 10 both ends of thermistor changes therewith, so that the first metallic conduction plate 4 and
Voltage between two metallic conduction plates 5 changes, since the first parallel metallic conduction plate 4 and the second metallic conduction plate 5 produce
Raw magnetic field strength also changes therewith, and the variation of magnetic field strength can change the refractive index of electro-optic crystal 3, to change reflection
The phase of laser, then pass through the phase change of 13 real-time monitoring of optics phase discriminator, 10 paving locations of thermistor can be obtained
Temperature value.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all include
Within protection scope of the present invention.
Claims (2)
1. a kind of non-contact temperature measuring device based on thermistor, it is characterised in that: including laser (1), half-reflecting half mirror
(2), electro-optic crystal (3), the first metallic conduction plate (4), the second metallic conduction plate (5), reflecting mirror (6), the first connecting wire
(7), the second connecting wire (8), resistance (9), thermistor (10), supply port (11), grounding ports (12) and optics phase demodulation
Device (13)；
The laser (1) generates beam of laser, after half-reflecting half mirror (2), into electro-optic crystal (3), in reflecting mirror (6)
On be reflected back half-reflecting half mirror (2), reflection laser after half-reflecting half mirror (2) enter optics phase discriminator (13), optics phase demodulation
The phase of device (13) real-time monitoring laser；
Electro-optic crystal (3) refractive index is directly proportional to the magnetic field strength that it is born；
The first metallic conduction plate (4) is parallel to each other with the second metallic conduction plate (5)；
First connecting wire (7), the second connecting wire (8) one end connect respectively with the thermistor (10) both ends,
The other end is connect with the first metallic conduction plate (4), the second metallic conduction plate (5) respectively；
The resistance (9) is fixed resistance value resistance；
Thermistor (10) resistance value changes with variation of ambient temperature；
Constant supply voltage is provided between the supply port (11) and grounding ports (12), when temperature leads to thermistor
(10) when change in resistance, the voltage at thermistor (10) both ends changes therewith, so that the first metallic conduction plate (4) and second
Voltage between metallic conduction plate (5) changes, due to parallel the first metallic conduction plate (4) and the second metallic conduction plate
(5) magnetic field strength generated also changes therewith, and the variation of magnetic field strength can change the refractive index of electro-optic crystal (3), thus
Change the phase of reflection laser, then pass through the phase change of optics phase discriminator (13) real-time monitoring, thermistor can be obtained
(10) temperature value of institute's paving location.
2. a kind of non-contact temperature measuring device based on thermistor as described in claim 1, which is characterized in that the temperature-sensitive
Resistance (10) includes negative tempperature coefficient thermistor or posive temperature coefficient thermistor, and wherein the thermistor (10) is wrapped
Include the thermistor based on semiconductor, the thermistor based on ceramics or based on the thermistor of polymer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810827340.XA CN109186781B (en) | 2018-07-25 | 2018-07-25 | Non-contact temperature measuring device based on thermistor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810827340.XA CN109186781B (en) | 2018-07-25 | 2018-07-25 | Non-contact temperature measuring device based on thermistor |
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| Publication Number | Publication Date |
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| CN109186781A true CN109186781A (en) | 2019-01-11 |
| CN109186781B CN109186781B (en) | 2020-07-24 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4563748A (en) * | 1981-10-20 | 1986-01-07 | Citizen Watch Company Limited | Temperature measuring system |
| JPH08220577A (en) * | 1995-02-09 | 1996-08-30 | Ando Electric Co Ltd | Higher harmonics generator using nonlinear optical crystal |
| US7059769B1 (en) * | 1997-06-27 | 2006-06-13 | Patrick Henry Potega | Apparatus for enabling multiple modes of operation among a plurality of devices |
| CN101825656A (en) * | 2009-12-31 | 2010-09-08 | 上海亨通光电科技有限公司 | Method for rapidly testing half-wave voltage value of lithium niobate optical modulator |
| CN101424708B (en) * | 2008-12-05 | 2011-06-22 | 北京航空航天大学 | Optical voltage transformer |
| KR101768601B1 (en) * | 2016-05-27 | 2017-08-18 | 주식회사 서울스탠다드 | LCD for Military Equipment |
-
2018
- 2018-07-25 CN CN201810827340.XA patent/CN109186781B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4563748A (en) * | 1981-10-20 | 1986-01-07 | Citizen Watch Company Limited | Temperature measuring system |
| JPH08220577A (en) * | 1995-02-09 | 1996-08-30 | Ando Electric Co Ltd | Higher harmonics generator using nonlinear optical crystal |
| US7059769B1 (en) * | 1997-06-27 | 2006-06-13 | Patrick Henry Potega | Apparatus for enabling multiple modes of operation among a plurality of devices |
| CN101424708B (en) * | 2008-12-05 | 2011-06-22 | 北京航空航天大学 | Optical voltage transformer |
| CN101825656A (en) * | 2009-12-31 | 2010-09-08 | 上海亨通光电科技有限公司 | Method for rapidly testing half-wave voltage value of lithium niobate optical modulator |
| KR101768601B1 (en) * | 2016-05-27 | 2017-08-18 | 주식회사 서울스탠다드 | LCD for Military Equipment |
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| Publication number | Publication date |
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| CN109186781B (en) | 2020-07-24 |
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