CN220288829U - Temperature measuring device and system - Google Patents
Temperature measuring device and system Download PDFInfo
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- CN220288829U CN220288829U CN202321908001.7U CN202321908001U CN220288829U CN 220288829 U CN220288829 U CN 220288829U CN 202321908001 U CN202321908001 U CN 202321908001U CN 220288829 U CN220288829 U CN 220288829U
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- 239000000919 ceramic Substances 0.000 claims abstract description 135
- 238000009529 body temperature measurement Methods 0.000 claims abstract description 19
- 230000010287 polarization Effects 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 8
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 4
- 238000007747 plating Methods 0.000 description 4
- 229910052709 silver Inorganic materials 0.000 description 4
- 239000004332 silver Substances 0.000 description 4
- 230000005684 electric field Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003449 preventive effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
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Abstract
The embodiment of the utility model discloses a temperature measuring device and a temperature measuring system. The temperature measuring device includes: at least one ceramic cavity for transmitting and receiving signals; at least one feed point, the feed point is positioned in the ceramic cavity and used for transmitting signals transmitted and received by the ceramic cavity, the received signals comprise energy signals, and the energy signals comprise temperature information of a target to be detected; the line is connected with the feed point and is used for transmitting signals to the feed point and transmitting energy signals; and the controller is connected with the circuit and is used for receiving an externally transmitted control instruction, generating a control signal according to the control instruction so as to control the ceramic cavity to emit a signal and determining the temperature of the target to be detected according to the energy signal. The temperature measuring device and the temperature measuring system provided by the embodiment of the utility model can improve the reliability of temperature measurement.
Description
Technical Field
The embodiment of the utility model relates to a temperature measurement technology, in particular to a temperature measurement device and a temperature measurement system.
Background
For products or equipment with temperature measurement requirements, the temperature of the products or equipment is measured by a temperature measuring device. For example, many businesses advocate preventive maintenance of equipment, and temperature is the most important monitored parameter in preventive maintenance, with either too high or too low a temperature indicating the possibility of failure. The realization of the on-line temperature monitoring is an important means for ensuring the safe operation of the high-voltage equipment, and the equipment is required to be measured by a temperature measuring device at the moment.
At present, the existing temperature measuring device usually measures temperature according to a single energy signal, and the temperature measuring mode has the problem of inaccurate temperature measurement when the energy of the energy signal is too low.
Disclosure of Invention
The embodiment of the utility model provides a temperature measuring device and a temperature measuring system, which are used for improving the reliability of temperature measurement.
In a first aspect, an embodiment of the present utility model provides a temperature measuring device, including:
at least one ceramic cavity for transmitting and receiving signals;
at least one feed point, the feed point is positioned in the ceramic cavity and used for transmitting signals transmitted and received by the ceramic cavity, the received signals comprise energy signals, and the energy signals comprise temperature information of a target to be detected;
the line is connected with the feed point and is used for transmitting signals to the feed point and transmitting energy signals;
and the controller is connected with the circuit and is used for receiving an externally transmitted control instruction, generating a control signal according to the control instruction so as to control the ceramic cavity to emit a signal and determining the temperature of the target to be detected according to the energy signal.
According to the technical scheme, the controller controls the ceramic cavities to emit signals, the temperature of the target to be detected is determined according to the energy signals received by the ceramic cavities, the two ceramic cavities and the two feed points are taken as examples, the energy signals received by the two ceramic cavities are transmitted to the circuit through the feed points corresponding to the two ceramic cavities, the circuit synthesizes the energy signals received by the two ceramic cavities to obtain a synthesized energy signal, the controller determines the temperature of the target to be detected according to the synthesized energy signal, the synthesized energy signal has more energy than the energy signal which is not synthesized, and the problem that the temperature determined when the energy of the energy signal is too low is solved.
Optionally, the ceramic cavity includes a first ceramic cavity and a second ceramic cavity, and the feed point includes a first feed point disposed in the first ceramic cavity and a second feed point disposed in the second ceramic cavity.
Optionally, the first ceramic cavity and the second ceramic cavity respectively receive the first energy signal and the second energy signal, the first feed point and the second feed point respectively synthesize the first energy signal and the second energy signal through a circuit to obtain a synthesized signal, and the controller determines the temperature of the target to be measured according to the synthesized signal.
Optionally, the first ceramic cavity and the second ceramic cavity are the same in size and structure, and the first feed point is the same in height from the top of the first ceramic cavity and the second feed point is the same in height from the top of the second ceramic cavity.
Optionally, the lines include a first section line, a second section line, and a third section line; one end of the first section of line is connected with the feed point, the other end of the first section of line is connected with the third section of line through the second section of line, and the third section of line is connected with the controller.
Optionally, the line resistance of the first section line is the same as the line resistance of the third section line, the line width of the first section line is the same as the line width of the third section line, the line resistance of the second section line is larger than the line resistance of the first section line, and the line width of the second section line is smaller than the line width of the first section line.
Optionally, the ceramic cavity is cuboid, the feed point is located at the side face of the ceramic cavity, and the difference between the height of the position where the feed point is located and the height of the top of the ceramic cavity is 23.5mm.
Optionally, silver plating is performed on the surface of the ceramic cavity, and a feed point is arranged on one ceramic cavity, wherein the feed point forms circular polarization.
Optionally, the line is a microstrip line.
In a second aspect, an embodiment of the present utility model provides a temperature measurement system, including the temperature measurement device according to the first aspect, and further including a transceiver device, where the transceiver device is connected to the temperature measurement device in a communication manner.
The temperature measuring device and the temperature measuring system provided by the embodiment of the utility model comprise: at least one ceramic cavity for transmitting and receiving signals; at least one feed point, the feed point is positioned in the ceramic cavity and used for transmitting signals transmitted and received by the ceramic cavity, the received signals comprise energy signals, and the energy signals comprise temperature information of a target to be detected; the line is connected with the feed point and is used for transmitting signals to the feed point and transmitting energy signals; and the controller is connected with the circuit and is used for receiving an externally transmitted control instruction, generating a control signal according to the control instruction so as to control the ceramic cavity to emit a signal and determining the temperature of the target to be detected according to the energy signal. According to the temperature measuring device and the temperature measuring system provided by the embodiment of the utility model, the controller controls the ceramic cavity to emit signals, and determines the temperature of the target to be measured according to the energy signals received by the ceramic cavity, and the two ceramic cavities and the two feed points are taken as examples, the energy signals received by the two ceramic cavities are transmitted to the circuit through the corresponding feed points, the circuit synthesizes the energy signals received by the two ceramic cavities to obtain a synthesized energy signal, the controller determines the temperature of the target to be measured according to the synthesized energy signal, the synthesized energy signal has more energy than the energy signal which is not synthesized, and the problem that the temperature determined when the energy of the energy signal is too low is solved.
Drawings
FIG. 1 is a block diagram of a temperature measuring device according to an embodiment of the present utility model;
FIG. 2 is a schematic structural diagram of a portion of a temperature measuring device according to an embodiment of the present utility model;
fig. 3 is a schematic structural diagram of a circuit according to a second embodiment of the present utility model;
fig. 4 is a schematic structural diagram of a ceramic cavity according to a second embodiment of the present utility model.
Detailed Description
The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.
Example 1
Fig. 1 is a block diagram of a temperature measuring device according to a first embodiment of the present utility model, and fig. 2 is a schematic structural diagram of a part of a structure of a temperature measuring device according to a first embodiment of the present utility model. Referring to fig. 1 and 2, the temperature measuring device includes: at least one ceramic cavity 10, at least one feed point 20, a line 30, and a controller 40.
Wherein the ceramic cavity 10 is used for transmitting and receiving signals; the feed point 20 is positioned in the ceramic cavity 10, and the feed point 20 is used for transmitting signals transmitted and received by the ceramic cavity, wherein the received signals comprise energy signals, and the energy signals comprise temperature information of a target to be detected; the line 30 is connected with the feed point 20, and the line 30 is used for transmitting signals to the feed point and transmitting energy signals; the controller 40 is connected to the line 30, and is configured to receive a control command transmitted from the outside, generate a control signal according to the control command, control the ceramic cavity to emit a signal, and determine a temperature of the target to be measured according to the energy signal.
Specifically, the object to be measured may be a heat-generating article, and the temperature of the heat-generating article is measured by the temperature measuring device. Illustratively, two ceramic cavities 10 are shown in fig. 1 and 2, where each ceramic cavity 10 is provided with one feed point 20, and the ceramic cavities 10 are in one-to-one correspondence with the feed points 20. Taking two ceramic cavities 10 and two feed points 20 as examples, when the controller 40 receives an externally transmitted control instruction, a control signal is generated according to the control instruction, and is transmitted to the two feed points 20 through a circuit, the control signal is respectively transmitted to the two ceramic cavities 10 corresponding to the two feed points 20 through the two feed points 20, at this time, the two ceramic cavities 10 both transmit signals, then receive signals fed back by a transceiver located at a target to be detected, the signals received by the two ceramic cavities 10 are respectively transmitted to the controller 40 through the corresponding feed points 20 and the circuit 30, and the controller 40 judges whether the signals received by the two ceramic cavities 10 are signals transmitted by the transceiver located at the target to be detected. When the controller 40 determines that the signals received by the two ceramic cavities 10 are all signals sent by the transceiver at the target to be measured, the controller 40 controls the two ceramic cavities 10 to emit signals, at this time, the signals emitted by the two ceramic cavities 10 are signals required to obtain the temperature of the target to be measured, and then receives an energy signal fed back by the transceiver at the target to be measured, wherein the energy signal is a signal including the temperature information of the target to be measured. The energy signals received by the two ceramic cavities 10 are transmitted to the circuit 30 through the corresponding feed points 20, the circuit 30 synthesizes the energy signals received by the two ceramic cavities 10 to obtain synthesized energy signals, the synthesized energy signals are transmitted to the controller 40, and the controller 40 determines the temperature of the target to be detected according to the synthesized energy signals. The synthesized energy signal has more energy than the non-synthesized energy signal, which can solve the problem of inaccurate temperature determination when the energy of the energy signal is too low.
The temperature measuring device provided in this embodiment includes: at least one ceramic cavity for transmitting and receiving signals; at least one feed point, the feed point is positioned in the ceramic cavity and used for transmitting signals transmitted and received by the ceramic cavity, the received signals comprise energy signals, and the energy signals comprise temperature information of a target to be detected; the line is connected with the feed point and is used for transmitting signals to the feed point and transmitting energy signals; and the controller is connected with the circuit and is used for receiving an externally transmitted control instruction, generating a control signal according to the control instruction so as to control the ceramic cavity to emit a signal and determining the temperature of the target to be detected according to the energy signal. According to the temperature measuring device provided by the embodiment, the controller controls the ceramic cavity to emit signals, the temperature of the target to be measured is determined according to the energy signals received by the ceramic cavity, two ceramic cavities and two feeding points are taken as examples, the energy signals received by the two ceramic cavities are transmitted to the circuit through the corresponding feeding points, the circuit synthesizes the energy signals received by the two ceramic cavities to obtain a synthesized energy signal, the controller determines the temperature of the target to be measured according to the synthesized energy signal, the synthesized energy signal has more energy than the energy signal which is not synthesized, and the problem that the temperature determined when the energy of the energy signal is too low is solved.
Example two
Fig. 3 is a schematic structural diagram of a ceramic cavity according to a second embodiment of the present utility model. The present embodiment is based on the first embodiment, and referring to fig. 2 and 3, alternatively, the ceramic cavity 10 includes a first ceramic cavity 11 and a second ceramic cavity 12, and the feed point 20 includes a first feed point 21 disposed in the first ceramic cavity 11 and a second feed point 22 disposed in the second ceramic cavity 12.
Wherein the first ceramic cavity 11 transmits signals through a first feed point 21 and the second ceramic cavity 12 transmits signals through a second feed point 22. For example, the energy signal received by the first ceramic cavity 11 is transmitted to the line 30 through the first feed point 21, and the energy signal received by the second ceramic cavity 12 is transmitted to the line 30 through the second feed point 22, and then transmitted to the controller 40 through the line. The control signal from the controller 40 is transmitted to the first ceramic cavity 11 through the first feed point 21 and to the second ceramic cavity 12 through the second feed point 22.
Optionally, the first ceramic cavity 11 and the second ceramic cavity 12 respectively receive the first energy signal and the second energy signal, the first feed point 21 and the second feed point 22 respectively synthesize the first energy signal and the second energy signal through the line 30 to obtain synthesized signals, and the controller 40 determines the temperature of the target to be measured according to the synthesized signals.
Specifically, the first energy signal received by the first ceramic cavity 11 is transmitted to the line 30 through the first feed point 21, and the second energy signal received by the second ceramic cavity 12 is transmitted to the line 30 through the second feed point 22. The first energy signal and the second energy signal are combined via line 30 to obtain a combined signal, the energy of which is the sum of the energy of the first energy signal and the energy of the second energy signal. For example, the synthetic gain is larger than 6dBi, and the working frequency of the temperature measuring device is 900MHz-930MHz. The controller 40 determines the temperature of the object to be measured from the synthesized signal, and can solve the problem of inaccurate temperature determination when the energy of the single energy signal is too low.
Optionally, the first ceramic cavity 11 and the second ceramic cavity 12 are the same in size and structure, and the first feed point 21 is at the same height from the top of the first ceramic cavity 11, and the second feed point 22 is at the same height from the top of the second ceramic cavity 12. By this arrangement it is ensured that the signal energy received by the first ceramic cavity 11 is the same as the signal energy received by the second ceramic cavity 12 and that the signal energy received by the first feed point 21 is the same as the signal energy received by the second feed point 22.
Optionally, the line 30 includes a first section line 31, a second section line 32, and a third section line 33; one end of the first section line 31 is connected to the feed point, the other end of the first section line 31 is connected to the third section line 33 through the second section line 32, and the third section line 33 is connected to the controller 40.
Fig. 4 is a schematic structural diagram of a circuit according to a second embodiment of the present utility model. Referring to fig. 2, 3 and 4, taking two ceramic cavities and two feeding points as an example, each ceramic cavity is provided with one feeding point, the number of first section lines 31 is two, the number of second section lines 32 is two, the number of third section lines 33 is one, the feeding points are in one-to-one correspondence with the first section lines 31, and the first section lines 31 are in one-to-one correspondence with the second section lines 32. The two first-section lines 31 are connected to respective corresponding feed points and respective corresponding second-section lines 32, and the two second-section lines 32 are connected to a third-section line 33, so that signals transmitted to the lines from the two feed points are synthesized through the third-section line 33.
Optionally, the resistance of the first section line 31 is the same as the resistance of the third section line 33, the line width of the first section line 31 is the same as the line width of the third section line 33, the resistance of the second section line 32 is larger than the resistance of the first section line 31, and the line width of the second section line 32 is smaller than the line width of the first section line 31.
Illustratively, the first line 31 has a line resistance of 50 ohms, the first line 31 has a line width of 3mm, the second line 32 has a line resistance of 70.7 ohms, the second line 32 has a line width of 1.7mm, the second line 32 has a line length of 46.8mm, the third line 33 has a line resistance of 50 ohms, and the third line 33 has a line width of 3mm, so as to ensure that the energy loss during signal transmission is small.
It should be noted that, the line resistance, the line width and the line length of each section of the line are only schematically illustrated, and may be specifically determined according to the actual temperature measurement requirement, which is not limited herein.
Optionally, the ceramic cavity is cuboid, the feed point is located at the side face of the ceramic cavity, and the difference between the height of the position where the feed point is located and the height of the top of the ceramic cavity is 23.5mm.
Specifically, referring to fig. 3, the length of the ceramic cavity is L, L is 62.5mm, the difference between the height of the center of the feed point and the height of the top of the ceramic cavity is h, h is 23.5mm, and the specific value of h can be obtained through simulation, so as to ensure that the impedance between the feed point and the cavity and the atmosphere is 50 ohms.
Optionally, silver plating is performed on the surface of the ceramic cavity, and a feed point is arranged on one ceramic cavity, wherein the feed point forms circular polarization.
Specifically, the ceramic cavity adopts a silver plating process on the surface of the high-dielectric ceramic, so that the miniaturization of the volume can be ensured, and the silver plating process can reduce the monomer loss. For circular polarization, when the angle between the polarization plane of the radio wave and the earth normal plane changes periodically from 0 to 360 degrees, that is, the electric field is constant in size and changes in direction with time, the projection of the trajectory of the end of the electric field vector on the plane perpendicular to the propagation direction is a circle, that is, circular polarization. Circular polarization can be obtained when the horizontal and vertical components of the electric field are equal in amplitude and differ in phase by 90 ° or 270 °. If the polarization plane rotates along with time and forms a right spiral relation with the propagation direction of the electromagnetic wave, right circular polarization is called; otherwise, if left-handed, it is referred to as left circular polarization. The ceramic cavity can be designed to be right circular polarization or be designed to be rotary circular polarization so as to increase the non-directivity of radio frequency temperature measurement.
Optionally, the line is a microstrip line.
The microstrip line is a microwave transmission line formed by a single conductor strip supported on a dielectric substrate, and is suitable for manufacturing a planar structure transmission line of a microwave integrated circuit. The dielectric substrate is made of a material with high dielectric constant and low microwave loss. The conductor has the characteristics of high conductivity, good stability, strong adhesion with the substrate and the like. Microstrip lines can transmit high frequency signals more efficiently, and are small in size, light in weight, wide in use band, high in reliability, low in manufacturing cost, and the like, as compared with metal waveguides, and are generally manufactured using a thin film process.
The temperature measuring device provided in this embodiment includes: at least one ceramic cavity for transmitting and receiving signals; at least one feed point, the feed point is positioned in the ceramic cavity and used for transmitting signals transmitted and received by the ceramic cavity, the received signals comprise energy signals, and the energy signals comprise temperature information of a target to be detected; the line is connected with the feed point and is used for transmitting signals to the feed point and transmitting energy signals; the controller is connected with the circuit and is used for receiving an externally transmitted control instruction, generating a control signal according to the control instruction so as to control the ceramic cavity to emit a signal and determining the temperature of a target to be detected according to the energy signal; the ceramic cavity comprises a first ceramic cavity and a second ceramic cavity, and the feed point comprises a first feed point arranged in the first ceramic cavity and a second feed point arranged in the second ceramic cavity; the circuit comprises a first section of circuit, a second section of circuit and a third section of circuit; one end of the first section of line is connected with the feed point, the other end of the first section of line is connected with the third section of line through the second section of line, and the third section of line is connected with the controller. According to the temperature measuring device provided by the embodiment, the controller controls the ceramic cavity to emit signals, the temperature of the target to be measured is determined according to the energy signals received by the ceramic cavity, two ceramic cavities and two feeding points are taken as examples, the energy signals received by the two ceramic cavities are transmitted to the circuit through the corresponding feeding points, the circuit synthesizes the energy signals received by the two ceramic cavities to obtain a synthesized energy signal, the controller determines the temperature of the target to be measured according to the synthesized energy signal, the synthesized energy signal has more energy than the energy signal which is not synthesized, and the problem that the temperature determined when the energy of the energy signal is too low is solved.
The embodiment also provides a temperature measuring system, which comprises the temperature measuring device according to any embodiment of the utility model, and further comprises a transceiver device which is in communication connection with the temperature measuring device.
Specifically, the transceiver is disposed at the target to be measured, the temperature measuring device transmits a signal to the transceiver, and then receives a signal fed back by the transceiver to determine whether the received signal is the signal at the target to be measured. When the received signal is determined to be the signal at the position of the target to be detected, the signal for acquiring the temperature of the target to be detected is sent to the receiving and transmitting device, then the energy signal fed back by the receiving and transmitting device at the position of the target to be detected is received, the energy signal is the signal comprising the temperature information of the target to be detected, and the temperature measuring device determines the temperature of the target to be detected according to the energy signal.
The temperature measuring system provided by the embodiment of the utility model belongs to the same inventive concept as the temperature measuring device provided by any embodiment of the utility model, so that the temperature measuring system has the same beneficial effects, and technical details not fully shown in the embodiment of the utility model are detailed in the temperature measuring device provided by any embodiment of the utility model.
Note that the above is only a preferred embodiment of the present utility model and the technical principle applied. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements, combinations, and substitutions can be made by those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.
Claims (10)
1. A temperature measurement device, comprising:
at least one ceramic cavity for transmitting and receiving signals;
the feed point is positioned in the ceramic cavity and is used for transmitting signals transmitted and received by the ceramic cavity, the received signals comprise energy signals, and the energy signals comprise temperature information of a target to be detected;
the line is connected with the feed point and is used for transmitting signals to the feed point and transmitting the energy signals;
and the controller is connected with the circuit and is used for receiving an externally transmitted control instruction, generating a control signal according to the control instruction so as to control the ceramic cavity to emit a signal, and determining the temperature of the target to be detected according to the energy signal.
2. The temperature measurement device of claim 1, wherein the ceramic cavity comprises a first ceramic cavity and a second ceramic cavity, and the feed point comprises a first feed point disposed in the first ceramic cavity and a second feed point disposed in the second ceramic cavity.
3. The temperature measurement device according to claim 2, wherein the first ceramic cavity and the second ceramic cavity receive a first energy signal and a second energy signal, respectively, the first feed point and the second feed point synthesize the first energy signal and the second energy signal through the circuit, respectively, to obtain a synthesized signal, and the controller determines the temperature of the target to be measured according to the synthesized signal.
4. The temperature measurement device of claim 2, wherein the first ceramic cavity and the second ceramic cavity are the same in size and structure, and the first feed point is at the same height from the top of the first ceramic cavity and the second feed point is at the same height from the top of the second ceramic cavity.
5. The temperature measurement device of claim 1, wherein the lines include a first section of line, a second section of line, and a third section of line; one end of the first section of line is connected with the feed point, the other end of the first section of line is connected with the third section of line through the second section of line, and the third section of line is connected with the controller.
6. The temperature measurement device of claim 5, wherein the first line has a same line resistance as the third line, the first line has a line width that is the same as the third line, the second line has a line resistance that is greater than the first line, and the second line has a line width that is less than the first line.
7. The temperature measurement device of claim 1, wherein the ceramic cavity is a cuboid, the feed point is located on a side surface of the ceramic cavity, and a difference between a height of the feed point and a height of a top of the ceramic cavity is 23.5mm.
8. The temperature measuring device according to claim 1, wherein the surface of the ceramic cavity is silver-plated, one of the ceramic cavities is provided with one of the feed points, and the feed points form circular polarization.
9. The temperature measuring device of claim 1, wherein the line is a microstrip line.
10. A temperature measuring system, characterized by comprising a temperature measuring device according to any of claims 1-9, and further comprising a transceiver device, said transceiver device being in communication with said temperature measuring device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321908001.7U CN220288829U (en) | 2023-07-19 | 2023-07-19 | Temperature measuring device and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321908001.7U CN220288829U (en) | 2023-07-19 | 2023-07-19 | Temperature measuring device and system |
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| Publication Number | Publication Date |
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| CN220288829U true CN220288829U (en) | 2024-01-02 |
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| CN202321908001.7U Active CN220288829U (en) | 2023-07-19 | 2023-07-19 | Temperature measuring device and system |
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