CN204007880U - A kind of non-contact infrared temperature collecting device - Google Patents
A kind of non-contact infrared temperature collecting device Download PDFInfo
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- CN204007880U CN204007880U CN201420378492.3U CN201420378492U CN204007880U CN 204007880 U CN204007880 U CN 204007880U CN 201420378492 U CN201420378492 U CN 201420378492U CN 204007880 U CN204007880 U CN 204007880U
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- 238000001914 filtration Methods 0.000 claims abstract description 7
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- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 5
- 239000003990 capacitor Substances 0.000 claims description 14
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 5
- 230000005855 radiation Effects 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
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Abstract
A kind of non-contact infrared temperature collecting device, be linked in sequence by pyroelectric infrared sensor, signal amplification circuit, filtering circuit company and adding circuit, the input end of adding circuit connects the output terminal of temperature-compensation circuit simultaneously, and temperature-compensation circuit comprises temperature compensated diode; Described pyroelectric infrared sensor is arranged in collecting cassette, and the window of pyroelectric infrared sensor is the opening to collecting cassette just; Between window and collecting cassette opening, shadow shield and slowspeed machine are set, shadow shield connects the rotating shaft of slowspeed machine, and shadow shield is strip; Described temperature compensated diode is also arranged in collecting cassette.The utility model response speed is very fast, and measurement range is adjustable, owing to not contacting with testee, does not also change the Temperature Distribution of testee, has advantages of that thermal inertia is little, is inconvenient to use the way of contact to measure the problem of temperature to solve industry spot simultaneously.
Description
Technical field
The utility model relates to industrial temperature acquisition technique field, is specially a kind of non-contact infrared temperature collecting device.
Background technology
At present, be much to utilize the way of contact such as platinum resistance, thermopair to measure temperature for industrial temperature data acquisition.Be characterized in temp probe to be positioned in test environment or directly to touch testee.And have good thermo-contact with testee, make both reach thermal equilibrium.But temperature-sensing element will contact with testee, often to destroy the thermal equilibrium state of testee, and be subject to the corrosive attack of measured medium, serve inconvenience to actual measurement band.May have at some industrial sites the situation that is not suitable for installing temp probe in addition, such as the temperature of measurement mechanical gear or machine intimate parts, traditional metering system is difficult to meet the demands.
Summary of the invention
For above-mentioned deficiency, the utility model provides a kind of non-contact infrared temperature collecting device, is inconvenient to use the way of contact to measure the problem of temperature to solve industry spot.
To achieve these goals, the utility model is taked following technical scheme: a kind of non-contact infrared temperature collecting device, be linked in sequence by pyroelectric infrared sensor, signal amplification circuit, filtering circuit and adding circuit, the input end of adding circuit connects the output terminal of temperature-compensation circuit simultaneously, and temperature-compensation circuit comprises temperature compensated diode; Described pyroelectric infrared sensor is arranged in collecting cassette, and the window of pyroelectric infrared sensor is the opening to collecting cassette just; Between window and collecting cassette opening, shadow shield and slowspeed machine are set, shadow shield connects the rotating shaft of slowspeed machine, and shadow shield is strip; Described temperature compensated diode is also arranged in collecting cassette.
Preferred as one: the signal output part of described pyroelectric infrared sensor is by the in-phase input end of capacitor C 2 concatenation operation amplifier U1A, the in-phase input end of operational amplifier U1A is simultaneously by resistance R 6 connecting analog ground, the inverting input of operational amplifier U1A is by resistance R 3 connecting analog ground, the output terminal of operational amplifier U1A connects a stiff end of potentiometer RP1, another end stiff end of potentiometer RP1 is by adjustable resistance R9 connecting analog ground, and the sliding end of potentiometer RP1 is by the inverting input of resistance R 10 concatenation operation amplifier U1A.
The output terminal contact resistance R1 of operational amplifier U1A, the other end of resistance R 1 is respectively by output terminal and the in-phase input end of capacitor C 1 and resistance R 2 concatenation operation amplifier U1B, the in-phase input end of operational amplifier U1B is by capacitor C 3 connecting analog ground simultaneously, and the inverting input of operational amplifier U1B is connected by resistance R 7 with output terminal.
The output terminal of operational amplifier U1B, by the in-phase input end of resistance R 5 concatenation operation amplifier U1C, the in-phase input end of operational amplifier U1C is the input end of adding circuit, the inverting input of operational amplifier U1C connects the negative pole of described temperature compensated diode, the output terminal of operational amplifier U1C is connected by resistance R 11 with inverting input, the output terminal that the output terminal of operational amplifier U1C is adding circuit.
The anodal contact resistance R12 of temperature compensated diode in temperature-compensation circuit, the other end of resistance R 12 is connected respectively the negative pole of temperature compensated diode and a stiff end of potentiometer RP3 with resistance R 13 by capacitor C 4, another stiff end of potentiometer RP3 connects the negative pole of temperature compensated diode by variable resistor R18, the sliding end of potentiometer RP3 is by the in-phase input end of resistance R 15 concatenation operation amplifier U1D, the inverting input of operational amplifier U1D is connected respectively the sliding end of temperature compensated diode positive pole and potentiometer RP2 with resistance R 20 by resistance R 17, the output terminal of a stiff end concatenation operation amplifier U1D of potentiometer RP2, another stiff end connects the negative pole of temperature compensated diode by variable resistor R19, the output terminal of operational amplifier U1D is as the output terminal of temperature-compensation circuit, by the in-phase input end of resistance R 8 concatenation operation amplifier U1C.
Described pyroelectric infrared sensor adopts P2288, and described temperature compensated diode adopts the silicon diode of negative temperature coefficient, and described operational amplifier U1A, U1B, U1C, U1D adopt transporting something containerized to be counted as amplifier LM2902.
The utility model response speed is very fast, and measurement range is adjustable, owing to not contacting with testee, does not also change the Temperature Distribution of testee, has advantages of that thermal inertia is little, is inconvenient to use the way of contact to measure the problem of temperature to solve industry spot simultaneously.
Brief description of the drawings
Fig. 1 is the system construction drawing of non-contact infrared temperature collecting device.
Fig. 2 is the inner mounting structure schematic diagram of the collecting cassette of non-contact infrared temperature collecting device.
Fig. 3 is the routine circuit theory diagrams of executing of non-contact infrared temperature collecting device reality.
In figure: 1-collecting cassette; 2-shadow shield; 3-slowspeed machine; 4-pyroelectric infrared sensor; 5-temperature compensated diode; 6-measured object.
Embodiment
By reference to the accompanying drawings, non-contact infrared temperature collecting device: as Fig. 1, shown in Fig. 2, be linked in sequence by pyroelectric infrared sensor 4, signal amplification circuit, filtering circuit company and adding circuit, the input end of adding circuit connects the output terminal of temperature-compensation circuit simultaneously, and temperature-compensation circuit comprises temperature compensated diode 5; Described pyroelectric infrared sensor 4 is arranged in collecting cassette 1, and the window of pyroelectric infrared sensor 4 is the opening to collecting cassette 1 just; Between window and collecting cassette 1 opening, shadow shield 2 and slowspeed machine 3 are set, shadow shield 2 connects the rotating shaft of slowspeed machine 3, and shadow shield 2 is strip; Described temperature compensated diode 5 is also arranged in collecting cassette 1.
As shown in Figure 3, the signal output part S of described pyroelectric infrared sensor 4 is by the in-phase input end of capacitor C 2 concatenation operation amplifier U1A, the in-phase input end of operational amplifier U1A is simultaneously by resistance R 6 connecting analog ground, the inverting input of operational amplifier U1A is by resistance R 3 connecting analog ground, the output terminal of operational amplifier U1A connects a stiff end of potentiometer RP1, another end stiff end of potentiometer RP1 is by adjustable resistance R9 connecting analog ground, and the sliding end of potentiometer RP1 is by the inverting input of the U1A of resistance R 10 concatenation operation amplifiers.
The output terminal contact resistance R1 of operational amplifier U1A, the other end of resistance R 1 is respectively by output terminal and the in-phase input end of capacitor C 1 and resistance R 2 concatenation operation amplifier U1B, the in-phase input end of operational amplifier U1B is by capacitor C 3 connecting analog ground simultaneously, and the inverting input of operational amplifier U1B is connected by resistance R 7 with output terminal.
The output terminal of operational amplifier U1B, by the in-phase input end of resistance R 5 concatenation operation amplifier U1C, the in-phase input end of operational amplifier U1C is the input end of adding circuit, the inverting input of operational amplifier U1C connects the negative pole K of described temperature compensated diode 5, the output terminal of operational amplifier U1C is connected by resistance R 11 with inverting input, the output terminal V0 that the output terminal of operational amplifier U1C is adding circuit.
The anodal A contact resistance R12 of temperature compensated diode 5 in temperature-compensation circuit, the other end of resistance R 12 is connected respectively the negative pole K of temperature compensated diode 5 and a stiff end of potentiometer RP3 with resistance R 13 by capacitor C 4, another stiff end of potentiometer RP3 connects the negative pole K of temperature compensated diode 5 by variable resistor R18, the sliding end of potentiometer RP3 is by the in-phase input end of resistance R 15 concatenation operation amplifier U1D, the inverting input of operational amplifier U1D is connected respectively the sliding end of the anodal A of temperature compensated diode 5 and potentiometer RP2 with resistance R 20 by resistance R 17, the output terminal of a stiff end concatenation operation amplifier U1D of potentiometer RP2, another stiff end connects the negative pole K of temperature compensated diode 5 by variable resistor R19, the output terminal of operational amplifier U1D is as the output terminal of temperature-compensation circuit, by the in-phase input end of resistance R 8 concatenation operation amplifier U1C.
Collecting cassette and inner shadow shield 2 are selected black alumina based material, and inner pyroelectric infrared sensor 4 is selected P2288, and it can receive the infrared ray that measured object 6 radiates and make it to convert to voltage signal.Due to 4 of pyroelectric infrared sensors ultrared radiation-induced temperature variation sensitivity to external world, the i.e. movement to measured object or motion sensitive, and to static or translational speed, measured object is insensitive slowly, so the utility model adopts slowspeed machine 3 to drive shadow shield 2 to rotate, make shadow shield open fast and block the opening of collecting cassette 1, simulate the fast moving of measured object 6 with this.Slowspeed machine 3 adopts DC speed-regulating motor, utilizes speed gear that rotating speed is reduced, and can increase moment, to drive shadow shield 2 to rotate simultaneously.Adjust slowspeed machine 3 rotating speeds shadow shield is rotated with the frequency of about 2Hz, and then make the infrared radiation of measured object 6 with the frequency incident of about 2Hz, pyroelectric infrared sensor 4 receives the infrared radiation of measured object 6 and makes it to convert to voltage signal with this frequency.Temperature compensated diode adopts the silicon diode of negative temperature coefficient, and its temperature characterisitic is-2mV/ DEG C.
Metering circuit selects one group of design parameter to be: R3, R6, R12, R13, R15, R17 all select the precision resistance of 10K/0.25W, R1, R2, R5, R8, R11 all select the precision resistance of 100K/0.25W, and R7, R10 all select the precision resistance of 220K/0.25W.R20 selects the precision resistance of 56K/0.25W, RP1, RP2 select the accurate adjustable potentiometer of the multi-turn of 10K/1W, RP3 selects the accurate adjustable potentiometer of the multi-turn of 1K/1W, R9, R19 select 1K rheostat, R18 selects 100 rheostats, C2 selects 47uF/16V alminium electrolytic condenser, C1 selects 0.22uF ceramic condenser, C4 selects 0.01uF ceramic condenser, U1 selects integrated operational amplifier LM2902, and its inside has four independently, high-gain, internal frequency compensated operational amplifier, uses as signal amplifier, wave filter, totalizer, differential amplifier respectively.Power supply VCC selects 9V direct supply.
As shown in Figure 3, pyroelectric infrared sensor 4 output signals are added with the compensating signal of temperature-compensation circuit after amplifying circuit amplification, filtering circuit filtering, realize the temperature signal Voltage-output of testee by adding circuit.Operational amplifier U1A is as being in-phase amplifier use, and input signal is coupled by capacitor C 2, and according to the resistance of selected R3 and R10, the closed-loop gain that makes operational amplifier U1A is between 22～23.Operational amplifier U1B uses as low-pass filter, its cutoff frequency and resistance R 1, R2, the selected resistance of capacitor C 1, C3 is relevant with capacitance size, be calculated as 7Hz through formula, this filtering circuit can filter the signal higher than 7Hz, by adjusting the sliding end of adjustable potentiometer RP1, regulate the size of filter input signal, making its operational amplifier U1B output voltage is 3.0V.Operational amplifier U1D uses as differential amplifier, and operational amplifier U1C uses as totalizer, and the temperature compensation signal operational amplifier U1D of the temperature compensated diode 5 in collecting cassette 1 amplifies, and then sends into operational amplifier U1C.By adjusting the sliding end of adjustable potentiometer RP3, the size of adjustable temperature compensation amount.In the time of 25 DEG C, regulating and making the output voltage of operational amplifier U1D is 1.0V.Operational amplifier U1C is added the output signal of the output of operational amplifier U1B and operational amplifier U1D.In the time of 200 ° of C, operational amplifier U1C is output as 4V, wherein amplifier is output as 3.0V, temperature compensation is output as 1.0V(25 DEG C), the output voltage of operational amplifier U1C has the extraordinary linearity with measurement temperature, available analog or digital method shows, with analog voltage table controlled 200 DEG C (4.0V) be full scale calibration; With numeral demonstration, output voltage need be decayed to 2 times, A/D converter is wanted the reference voltage of 2.0V.
Claims (3)
1. a non-contact infrared temperature collecting device, it is characterized in that, be linked in sequence by pyroelectric infrared sensor (4), signal amplification circuit, filtering circuit company and adding circuit, the input end of adding circuit connects the output terminal of temperature-compensation circuit simultaneously, and temperature-compensation circuit comprises temperature compensated diode (5); Described pyroelectric infrared sensor (4) is arranged in collecting cassette (1), the just opening to collecting cassette (1) of the window of pyroelectric infrared sensor (4); Between window and collecting cassette (1) opening, shadow shield (2) and slowspeed machine (3) are set, shadow shield (2) connects the rotating shaft of slowspeed machine (3), and shadow shield (2) is strip; Described temperature compensated diode (5) is also arranged in collecting cassette (1).
2. a kind of non-contact infrared temperature collecting device according to claim 1, it is characterized in that, the signal output part (S) of described pyroelectric infrared sensor (4) is by the in-phase input end of capacitor C 2 concatenation operation amplifier U1A, the in-phase input end of operational amplifier U1A is simultaneously by resistance R 6 connecting analog ground, the inverting input of operational amplifier U1A is by resistance R 3 connecting analog ground, the output terminal of operational amplifier U1A connects a stiff end of potentiometer RP1, another end stiff end of potentiometer RP1 is by adjustable resistance R9 connecting analog ground, the sliding end of potentiometer RP1 is by the inverting input of resistance R 10 concatenation operation amplifier U1A, the output terminal contact resistance R1 of operational amplifier U1A, the other end of resistance R 1 is respectively by output terminal and the in-phase input end of capacitor C 1 and resistance R 2 concatenation operation amplifier U1B, the in-phase input end of operational amplifier U1B is by capacitor C 3 connecting analog ground simultaneously, and the inverting input of operational amplifier U1B is connected by resistance R 7 with output terminal, the output terminal of operational amplifier U1B, by the in-phase input end of resistance R 5 concatenation operation amplifier U1C, the in-phase input end of operational amplifier U1C is the input end of adding circuit, the inverting input of operational amplifier U1C connects the negative pole (K) of described temperature compensated diode (5), the output terminal of operational amplifier U1C is connected by resistance R 11 with inverting input, the output terminal (V0) that the output terminal of operational amplifier U1C is adding circuit, positive pole (A) the contact resistance R12 of temperature compensated diode in temperature-compensation circuit (5), the other end of resistance R 12 is connected respectively the negative pole (K) of temperature compensated diode (5) and a stiff end of potentiometer RP3 with resistance R 13 by capacitor C 4, another stiff end of potentiometer RP3 connects the negative pole (K) of temperature compensated diode (5) by variable resistor R18, the sliding end of potentiometer RP3 is by the in-phase input end of resistance R 15 concatenation operation amplifier U1D, the inverting input of operational amplifier U1D is connected respectively the sliding end of temperature compensated diode (5) anodal (A) and potentiometer RP2 with resistance R 20 by resistance R 17, the output terminal of a stiff end concatenation operation amplifier U1D of potentiometer RP2, another stiff end connects the negative pole (K) of temperature compensated diode (5) by variable resistor R19, the output terminal of operational amplifier U1D is as the output terminal of temperature-compensation circuit, by the in-phase input end of resistance R 8 concatenation operation amplifier U1C.
3. a kind of non-contact infrared temperature collecting device according to claim 2, it is characterized in that, described pyroelectric infrared sensor (4) adopts P2288, described temperature compensated diode (5) adopts the silicon diode of negative temperature coefficient, and described operational amplifier U1A, U1B, U1C, U1D adopt transporting something containerized to be counted as amplifier LM2902.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420378492.3U CN204007880U (en) | 2014-07-09 | 2014-07-09 | A kind of non-contact infrared temperature collecting device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420378492.3U CN204007880U (en) | 2014-07-09 | 2014-07-09 | A kind of non-contact infrared temperature collecting device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105333961A (en) * | 2015-12-07 | 2016-02-17 | 川铁电气（天津）股份有限公司 | System achieving non-contact temperature measurement of high-voltage isolating switch on basis of thermo-electric pile principle |
| CN107976256A (en) * | 2017-11-27 | 2018-05-01 | 三亚学院 | A kind of reservoir vertical water temperature automatic observation device |
| CN111458041A (en) * | 2020-06-03 | 2020-07-28 | 安徽宝龙电器有限公司 | Infrared temperature sensor |
-
2014
- 2014-07-09 CN CN201420378492.3U patent/CN204007880U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105333961A (en) * | 2015-12-07 | 2016-02-17 | 川铁电气（天津）股份有限公司 | System achieving non-contact temperature measurement of high-voltage isolating switch on basis of thermo-electric pile principle |
| CN107976256A (en) * | 2017-11-27 | 2018-05-01 | 三亚学院 | A kind of reservoir vertical water temperature automatic observation device |
| CN111458041A (en) * | 2020-06-03 | 2020-07-28 | 安徽宝龙电器有限公司 | Infrared temperature sensor |
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