CN214149601U - External reference source device of infrared thermometer - Google Patents
External reference source device of infrared thermometer Download PDFInfo
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- CN214149601U CN214149601U CN202120524660.5U CN202120524660U CN214149601U CN 214149601 U CN214149601 U CN 214149601U CN 202120524660 U CN202120524660 U CN 202120524660U CN 214149601 U CN214149601 U CN 214149601U
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- infrared thermometer
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Abstract
The utility model relates to an external reference source device of an infrared thermometer, which comprises a metal catch, a steering engine and a temperature measuring circuit board; the metal blocking piece is arranged on a rotating shaft of the steering engine, the front surface of the metal blocking piece is driven to shield or remove a lens of the infrared thermometer when the steering engine operates, the temperature measuring circuit board is attached to the back surface of the metal blocking piece, and the temperature measuring circuit board is electrically connected with a machine core circuit of the infrared thermometer; the temperature measuring circuit board comprises a temperature sensor chip, a first resistor, a second resistor, a third resistor, a first capacitor, a second capacitor and a 4pi n connector, wherein the temperature sensor chip, the first resistor, the second resistor, the third resistor, the first capacitor and the second capacitor are integrated on the PCB; the utility model adopts the metal baffle as the external temperature measurement reference source, and realizes the temperature correction of the temperature drift phenomenon of the infrared thermometer under the precondition that external black body equipment is not used; in addition, the temperature measurement circuit board can accurately measure the internal temperature of the metal retaining sheet, so that the accuracy of temperature correction is ensured.
Description
Technical Field
The utility model relates to an infrared temperature measurement field, concretely relates to external reference source device of infrared radiation thermometer.
Background
The infrared thermometer is used as body temperature measuring equipment, is widely applied to places such as airports, stations, markets and the like, and can realize contactless body temperature measurement on a large number of people under the condition that the pedestrian passing efficiency is not influenced. Due to environmental influences and the characteristics of the infrared thermometer, the infrared thermometer inevitably has temperature drift, namely body temperature measurement errors, and further leads to the missed report or false report of abnormal body temperature patients. The prior art scheme for solving the technical problems is to recalibrate the temperature of the infrared thermometer by using a black body placed at a fixed position in a detection view field, namely recalibrating the reference temperature of the infrared thermometer and calibrating the drift temperature. However, in the prior art, the blackbody equipment is required to be arranged at a fixed position in the field of view of the infrared thermometer, and the blackbody equipment needs to be arranged in the optimal temperature measuring range, so that strict requirements on the use space and the environment are met, and the blackbody equipment is inconvenient to use in the field or narrow space where power supply is inconvenient; in addition, the blackbody equipment is additionally purchased, so that the cost of the whole temperature measuring system is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that an external reference source device of infrared thermometer is provided, can realize still can carry out accurate temperature correction to the temperature drift phenomenon that appears under the prerequisite that does not use external black body equipment.
The utility model provides an above-mentioned technical problem's technical scheme as follows: an external reference source device of an infrared thermometer comprises a metal catch, a steering engine and a temperature measuring circuit board; the metal blocking piece is arranged on a rotating shaft of the steering engine, the front surface of the metal blocking piece is driven to shield a lens of an infrared thermometer or be removed from the front of the lens of the infrared thermometer when the steering engine operates, the temperature measuring circuit board is attached to the back surface of the metal blocking piece, and the temperature measuring circuit board is electrically connected with a machine core circuit of the infrared thermometer; the temperature measuring circuit board comprises a temperature sensor chip U, a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a second capacitor C2 and a 4pin connector J, wherein the temperature sensor chip U, the first resistor R1, the second resistor R2, the third resistor R3, the first capacitor C1, the second capacitor C2 and the 4pin connector J are integrated on the PCB; the 4pin connector J is provided with 4 plug sockets, namely a VCC2V5 plug socket, a GND plug socket, an SCL plug socket and an SDA plug socket; the V + pin of the temperature sensor chip U is electrically connected to a VCC2V5 socket of the 4pin connector J, the V + pin of the temperature sensor chip U is also electrically connected to a GND socket of the 4pin connector J through the first capacitor C1, and the second capacitor C2 is connected in parallel with the first capacitor C1; a GND pin and an ADD0 pin of the temperature sensor chip U are electrically connected to a GND socket of the 4pin connector J; the ALERT pin of the temperature sensor chip U is electrically connected to the VCC2V5 socket of the 4pin connector J through the first resistor R1; the SCL pin of the temperature sensor chip U is electrically connected to the VCC2V5 socket of the 4pin connector J through the second resistor R2, and the SCL pin of the temperature sensor chip U is also electrically connected to the SCL socket of the 4pin connector J; the SDA pin of the temperature sensor chip U is electrically connected to the VCC2V5 socket of the 4pin connector J through the third resistor R3, and the SDA pin of the temperature sensor chip U is also electrically connected to the SDA socket of the 4pin connector J; and 4 plug sockets of the 4pin connector J are electrically connected with a core circuit of the infrared thermometer.
The utility model has the advantages that: the utility model relates to an external reference source device of infrared thermometer adopts the metal separation blade as external temperature measurement reference source, and the temperature measurement circuit board can measure the internal temperature of metal separation blade, and the infrared thermometer will carry out recalibration to the reference temperature according to the internal temperature of metal separation blade, when needing to recalibrate the reference temperature of infrared thermometer, steering wheel operation drives the front of metal separation blade is sheltered from before the camera lens of infrared thermometer, when not needing to recalibrate the reference temperature of infrared thermometer, the steering wheel operation drives the metal separation blade is removed from before the camera lens of infrared thermometer, and then be used for realizing under the prerequisite condition that does not use external black body equipment, carry out temperature correction to infrared thermometer temperature drift phenomenon; additionally, the utility model discloses a temperature measurement circuit board can carry out accurate measurement to the inside temperature of metal catch to guarantee temperature correction's precision.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
Further, the model of the temperature sensor chip U is TMP102aid rlr.
The beneficial effect of adopting the further scheme is that: the TMP102 AIDLLR type temperature sensor chip U can accurately measure the temperature.
Furthermore, the temperature measurement circuit board is fixedly installed on the back face of the metal separation blade through a screw, a groove is formed in the back face of the metal separation blade, and the temperature sensor chip U is tightly attached to the groove in the back face of the metal separation blade.
The beneficial effect of adopting the further scheme is that: the temperature sensor chip U is tightly attached to the groove in the back face of the metal separation blade, so that the influence of an external environment on the temperature sensor chip U can be avoided, the measurement precision is improved, and the temperature measured by the temperature sensor chip U is the internal temperature of the metal separation blade.
Furthermore, a through hole is formed in the metal blocking piece, and one end, electrically connected with a core circuit of the infrared thermometer, of the 4pin connector J penetrates through the through hole and protrudes out of the front face of the metal blocking piece.
The beneficial effect of adopting the further scheme is that: the 4pin connector J protrudes out of the front face of the metal separation blade, and is conveniently and electrically connected with an infrared thermometer.
Furthermore, the steering engine comprises a steering engine body, a disc and a pressing plate, the metal separation blade is installed on the rotating shaft of the steering engine body through the disc, and the steering engine body is fixed on the infrared thermometer through the pressing plate.
Further, the metal baffle is made of an aluminum alloy material.
The beneficial effect of adopting the further scheme is that: the aluminum alloy material has good heat dissipation and light weight.
Drawings
Fig. 1 is a schematic view of a three-dimensional structure of an external reference source device of an infrared thermometer of the present invention;
FIG. 2 is a cross-sectional view of the external reference source device of the infrared thermometer of the present invention;
fig. 3 is a schematic circuit structure diagram of the temperature measuring circuit board.
In the drawings, the components represented by the respective reference numerals are listed below:
1. metal separation blade, 2, steering wheel, 3, temperature measurement circuit board, 21, steering wheel body, 22, disc, 23, clamp plate, 31, temperature sensor chip U, 32, 4pin connector J.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1 and 2, an external reference source device of an infrared thermometer comprises a metal baffle 1, a steering engine 2 and a temperature measurement circuit board 3; the metal separation blade 1 is installed on the rotating shaft of the steering engine 2, the steering engine 2 drives the front face of the metal separation blade 1 to shield or remove a lens of an infrared thermometer when in operation, the temperature measurement circuit board 3 is installed on the back face of the metal separation blade 1 in a fitting mode, and the temperature measurement circuit board 3 is electrically connected with a machine core circuit of the infrared thermometer. As shown in fig. 3, the temperature measurement circuit board 3 includes a temperature sensor chip U integrated on the PCB, a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a second capacitor C2 and a 4pin connector J; the 4pin connector J is provided with 4 plug sockets, namely a VCC2V5 plug socket, a GND plug socket, an SCL plug socket and an SDA plug socket; the V + pin of the temperature sensor chip U is electrically connected to a VCC2V5 socket of the 4pin connector J, the V + pin of the temperature sensor chip U is also electrically connected to a GND socket of the 4pin connector J through the first capacitor C1, and the second capacitor C2 is connected in parallel with the first capacitor C1; a GND pin and an ADD0 pin of the temperature sensor chip U are electrically connected to a GND socket of the 4pin connector J; the ALERT pin of the temperature sensor chip U is electrically connected to the VCC2V5 socket of the 4pin connector J through the first resistor R1; the SCL pin of the temperature sensor chip U is electrically connected to the VCC2V5 socket of the 4pin connector J through the second resistor R2, and the SCL pin of the temperature sensor chip U is also electrically connected to the SCL socket of the 4pin connector J; the SDA pin of the temperature sensor chip U is electrically connected to the VCC2V5 socket of the 4pin connector J through the third resistor R3, and the SDA pin of the temperature sensor chip U is also electrically connected to the SDA socket of the 4pin connector J; and 4 plug sockets of the 4pin connector J are electrically connected with a core circuit of the infrared thermometer. The infrared thermometer supplies power to a temperature sensor chip U in the temperature measurement circuit board through a VCC2V5 socket of a 4pin connector J, and meanwhile, the internal temperature of a metal baffle sheet acquired by the temperature sensor chip U in the temperature measurement circuit board is transmitted to the infrared thermometer through an SCL socket and an SDA socket of the 4pin connector J. Specifically, the model of the temperature sensor chip U is TMP102aid rlr. The TMP102 AIDLLR type temperature sensor chip U can accurately measure the temperature.
In this particular embodiment: as shown in fig. 2, the temperature measuring circuit board 3 is fixedly mounted on the back surface of the metal baffle plate 1 through screws, a groove is formed in the back surface of the metal baffle plate 1, and the temperature sensor chip U31 is tightly attached to the groove in the back surface of the metal baffle plate 1. The temperature sensor chip U31 is tightly attached to the groove in the back face of the metal baffle plate 1, so that the influence of an external environment on the temperature sensor chip U31 can be avoided, the measurement precision is improved, and the temperature measured by the temperature sensor chip U31 is the internal temperature of the metal baffle plate. The metal separation blade 1 is provided with a through hole, and one end of the 4pin connector J32 electrically connected with a core circuit of the infrared thermometer penetrates through the through hole and protrudes out of the front surface of the metal separation blade 1. The 4pin connector J32 protrudes out of the front surface of the metal baffle plate 1, and is conveniently and electrically connected with an infrared thermometer. The steering engine 2 comprises a steering engine body 21, a disc 22 and a pressing plate 23, the metal blocking piece 1 is installed on a rotating shaft of the steering engine body 21 through the disc 22, and the steering engine body 21 is fixed on the infrared thermometer through the pressing plate 23. The metal baffle plate 1 is made of an aluminum alloy material. The aluminum alloy material has good heat dissipation and light weight.
The utility model relates to an external reference source device of an infrared thermometer, which adopts a metal baffle as an external temperature measurement reference source, a temperature measurement circuit board can measure the internal temperature of the metal baffle, the infrared thermometer recalibrates the reference temperature according to the internal temperature of the metal baffle, when the reference temperature of the infrared thermometer needs to be calibrated again, the steering engine operates to drive the front surface of the metal baffle to shield the front of the lens of the infrared thermometer so as to obtain the surface temperature of the metal baffle, when the reference temperature of the infrared thermometer does not need to be calibrated again, the steering engine operates to drive the metal baffle to be removed from the front of the lens of the infrared thermometer, so that under the precondition that external black body equipment is not used, temperature correction is carried out on the temperature drift phenomenon of the infrared thermometer, and the temperature correction is realized through the surface temperature and the internal temperature of the metal baffle piece at the same time; additionally, the utility model discloses a temperature measurement circuit board can carry out accurate measurement to the inside temperature of metal catch to guarantee temperature correction's precision.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (6)
1. The utility model provides an external reference source device of infrared thermometer which characterized in that: comprises a metal baffle, a steering engine and a temperature measuring circuit board; the metal blocking piece is arranged on a rotating shaft of the steering engine, the front surface of the metal blocking piece is driven to shield a lens of an infrared thermometer or be removed from the front of the lens of the infrared thermometer when the steering engine operates, the temperature measuring circuit board is attached to the back surface of the metal blocking piece, and the temperature measuring circuit board is electrically connected with a machine core circuit of the infrared thermometer; the temperature measuring circuit board comprises a temperature sensor chip U, a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a second capacitor C2 and a 4pin connector J, wherein the temperature sensor chip U, the first resistor R1, the second resistor R2, the third resistor R3, the first capacitor C1, the second capacitor C2 and the 4pin connector J are integrated on the PCB; the 4pin connector J is provided with 4 plug sockets, namely a VCC2V5 plug socket, a GND plug socket, an SCL plug socket and an SDA plug socket; the V + pin of the temperature sensor chip U is electrically connected to a VCC2V5 socket of the 4pin connector J, the V + pin of the temperature sensor chip U is also electrically connected to a GND socket of the 4pin connector J through the first capacitor C1, and the second capacitor C2 is connected in parallel with the first capacitor C1; a GND pin and an ADD0 pin of the temperature sensor chip U are electrically connected to a GND socket of the 4pin connector J; the ALERT pin of the temperature sensor chip U is electrically connected to the VCC2V5 socket of the 4pin connector J through the first resistor R1; the SCL pin of the temperature sensor chip U is electrically connected to the VCC2V5 socket of the 4pin connector J through the second resistor R2, and the SCL pin of the temperature sensor chip U is also electrically connected to the SCL socket of the 4pin connector J; the SDA pin of the temperature sensor chip U is electrically connected to the VCC2V5 socket of the 4pin connector J through the third resistor R3, and the SDA pin of the temperature sensor chip U is also electrically connected to the SDA socket of the 4pin connector J; and 4 plug sockets of the 4pin connector J are electrically connected with a core circuit of the infrared thermometer.
2. The external reference source device of the infrared thermometer according to claim 1, characterized in that: the model of the temperature sensor chip U is TMP102 AIDRLR.
3. The external reference source device of the infrared thermometer according to claim 1, characterized in that: the temperature measurement circuit board is fixedly installed on the back face of the metal separation blade through screws, a groove is formed in the back face of the metal separation blade, and the temperature sensor chip U is tightly attached to the groove in the back face of the metal separation blade.
4. The external reference source device of the infrared thermometer according to claim 1, characterized in that: the metal separation blade is provided with a through hole, and one end of the 4pin connector J, which is electrically connected with a core circuit of the infrared thermometer, penetrates through the through hole and protrudes out of the front surface of the metal separation blade.
5. The external reference source device of the infrared thermometer according to any one of claims 1 to 4, wherein: the steering engine comprises a steering engine body, a disc and a pressing plate, wherein the metal separation blade is installed on a rotating shaft of the steering engine body through the disc, and the steering engine body is fixed on the infrared thermometer through the pressing plate.
6. The external reference source device of the infrared thermometer according to any one of claims 1 to 4, wherein: the metal baffle is made of aluminum alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120524660.5U CN214149601U (en) | 2021-03-12 | 2021-03-12 | External reference source device of infrared thermometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120524660.5U CN214149601U (en) | 2021-03-12 | 2021-03-12 | External reference source device of infrared thermometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214149601U true CN214149601U (en) | 2021-09-07 |
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ID=77554058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120524660.5U Active CN214149601U (en) | 2021-03-12 | 2021-03-12 | External reference source device of infrared thermometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214149601U (en) |
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2021
- 2021-03-12 CN CN202120524660.5U patent/CN214149601U/en active Active
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