CN211013270U - Mutual inductance type wireless temperature sensor and temperature detection device - Google Patents
Mutual inductance type wireless temperature sensor and temperature detection device Download PDFInfo
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- CN211013270U CN211013270U CN201922202800.2U CN201922202800U CN211013270U CN 211013270 U CN211013270 U CN 211013270U CN 201922202800 U CN201922202800 U CN 201922202800U CN 211013270 U CN211013270 U CN 211013270U
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Abstract
The application provides a mutual inductance type wireless temperature sensor and a temperature detection device, comprising a first shell and a second shell; the second shell is covered on the first shell; a heat conducting metal sheet is arranged on the bottom surface of the first shell; a temperature detection chip is arranged on the heat-conducting metal sheet; the temperature detection chip is connected with a wireless transceiving module; a bobbin integrally formed with the second shell is arranged in the second shell; a metal coil is wound on the bobbin; the metal coil is electrically connected with the temperature detection chip; the bobbin is also provided with a hollow through hole; a partition plate is arranged on the first shell between the temperature detection chip and the bobbin; the partition plate is connected with the first shell in a sealing mode. By the mode, a coil framework does not need to be arranged on the PCB, and wiring on the PCB is more convenient; meanwhile, the volume of the sensor is reduced; the coil and the temperature detection chip are isolated by the partition plate, and the temperature detection accuracy can be improved.
Description
Technical Field
The application relates to the technical field of high-voltage equipment temperature monitoring, in particular to a mutual inductance type wireless temperature sensor and a temperature detection device.
Background
In an electric power system, the temperature rise of equipment such as a high-low voltage switch cabinet contact, a cable joint, a low-voltage heavy current cabinet, a ring main unit and the like is too high due to factors such as material aging, poor contact, current overload and the like. At present, the temperature measurement technology of the contact temperature of the electrical equipment mainly adopts manual detection and automatic detection. The manual detection mode is likely to cause harm to detection personnel. In the current automatic detection mode, the sensors are mostly connected in a wired mode, and wiring is inconvenient. A wireless temperature sensor is disclosed in patent document CN209197930U, which requires a coil bobbin to be provided on a PCB board, and then a metal coil is wound on the coil bobbin. However, when the metal coil is operated, the detection result of the temperature sensing chip may be affected, and the volume of the sensor may be increased by providing the coil bobbin.
SUMMERY OF THE UTILITY MODEL
An object of the application is to provide a mutual inductance type wireless temperature sensor and temperature-detecting device for the technical effect that temperature detection is carried out to high-voltage equipment more accurately when realizing reducing the volume of sensor.
In a first aspect, an embodiment of the present application provides a mutual inductance type wireless temperature sensor, including a first housing and a second housing; the second shell is covered on the first shell; a heat-conducting metal sheet is arranged on the bottom surface of the first shell; a temperature detection chip is arranged on the heat-conducting metal sheet; the temperature detection chip is connected with a wireless transceiving module; a bobbin integrally formed with the second shell is arranged in the second shell; a metal coil is wound on the bobbin; the metal coil is electrically connected with the temperature detection chip; the winding reel is also provided with a hollow through hole; a partition plate is arranged on the first shell between the temperature detection chip and the winding reel; the partition plate is connected with the first shell in a sealing mode.
In the implementation process, the metal coil is arranged on the bobbin in the second shell; the temperature detection chip is arranged on the first shell; a partition plate is arranged on the first shell between the winding reel and the temperature detection chip; the interference of the long-term operation of the metal coil on the detection result of the temperature detection chip can be reduced; meanwhile, a coil framework does not need to be arranged on the PCB, and the size of the sensor can be further reduced.
Furthermore, the second shell is provided with an L-shaped step part.
In the implementation process, the L-shaped step part is further arranged on the second shell, so that the sensor is convenient to take, and the position of the sensor can be adjusted more conveniently during installation.
Further, the wireless transceiver module is a 433MHz low power consumption transceiver module.
In the implementation process, the 433MHz low-power-consumption transceiver module is selected as the wireless transceiver module, so that a longer transmission distance can be provided, and the power consumption of the sensor can be reduced.
Furthermore, the heat-conducting metal sheet is provided with a glue filling hole.
In the implementation process, the heat conducting metal sheet is further provided with the glue filling hole, heat conducting glue can be filled into the assembled sensor through the glue filling hole, and the damp-proof effect can be achieved while heat conduction is well carried out.
In a second aspect, an embodiment of the present application provides a temperature detection device, which includes an alloy sheet and a non-conductive mutual inductance type wireless temperature sensor arranged on the alloy sheet in a penetrating manner.
In the implementation process, the mutual inductance type wireless temperature sensor is arranged on the alloy sheet in a penetrating mode, the alloy sheet can be cut after the size of the alloy sheet is adjusted by a user, and then the two ends of the alloy sheet are welded together to achieve installation of the sensor.
Furthermore, the alloy sheets on two sides of the mutual inductance type wireless temperature sensor are provided with silica gel anti-slip pads.
In the above-mentioned realization process, all being equipped with the silica gel slipmat of mutual inductance formula wireless temperature sensor both sides, can prevent the monitoring process, the sensor is not hard up, influences the accuracy that detects.
Furthermore, a plurality of silica gel antiskid teeth are arranged on the silica gel antiskid pad.
In the implementation process, in order to better prevent the sensor from loosening, a plurality of anti-slip teeth are further arranged on the silica gel anti-slip pad.
Further, a hollow clamping sleeve is sleeved on the alloy sheet; the alloy sheet is arranged in the clamping sleeve in a stacked mode at two ends, and the clamping sleeve is provided with a screw hole perpendicular to the alloy sheet.
In the implementation process, two ends of the alloy sheet are arranged in the clamping sleeve in a stacking mode, after the length of the alloy sheet is adjusted, a screw can be screwed into a screw hole in the clamping sleeve, and the sensor is more firmly installed on an interface of the equipment to be measured; and meanwhile, the installation is more convenient.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a schematic front view of a mutual inductance type wireless temperature sensor according to an embodiment of the present disclosure;
fig. 2 is a schematic top view of a mutual inductance type wireless temperature sensor according to an embodiment of the present disclosure;
fig. 3 is a schematic side view of a mutual inductance type wireless temperature sensor according to an embodiment of the present disclosure;
fig. 4 is a schematic diagram of an internal structure of a mutual inductance type wireless temperature sensor according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a temperature detection device according to an embodiment of the present application.
The icon comprises 10 parts of a temperature detection device, 100 parts of a mutual inductance type wireless temperature sensor, 110 parts of a first shell, 111 parts of a heat conduction metal sheet, 1111 parts of a glue filling hole, 112 parts of a temperature detection chip, 113 parts of a wireless transceiving module, 120 parts of a second shell, 121 parts of a bobbin, 1211 parts of a through hole, 122 parts of L-shaped stepped parts, 200 parts of an alloy sheet, 210 parts of a silica gel anti-skid pad, 211 parts of a silica gel anti-skid tooth, 220 parts of a clamping sleeve and 300 parts of a partition board.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. Meanwhile, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not to be construed as indicating or implying relative importance.
Referring to fig. 1 to 4, fig. 1 is a schematic front view illustrating a mutual inductance type wireless temperature sensor according to an embodiment of the present disclosure; fig. 2 is a schematic top view of a mutual inductance type wireless temperature sensor according to an embodiment of the present disclosure; fig. 2 is a schematic side view of a mutual inductance type wireless temperature sensor according to an embodiment of the present disclosure; fig. 4 is a schematic diagram of an internal structure of a mutual inductance type wireless temperature sensor according to an embodiment of the present disclosure.
The mutual inductance type wireless temperature sensor 100 provided by the embodiment of the application comprises a first shell 110 and a second shell 120; the second housing 120 covers the first housing 110; a heat conducting metal sheet 111 is arranged on the bottom surface of the first shell 110; a temperature detection chip 112 is arranged on the heat-conducting metal sheet 111; the temperature detection chip 112 is connected with a wireless transceiver module 113; a bobbin 121 integrally formed with the second housing 120 is provided in the second housing 120; a metal coil is wound on the bobbin 121; the metal coil is electrically connected with the temperature detection chip 112; the bobbin 121 is further provided with a hollow through hole 1211; a partition plate 300 is arranged on the first shell 110 between the temperature detection chip 112 and the bobbin 121; the partition plate 300 is hermetically coupled to the first housing 110.
In one embodiment, a snap may be provided around the edge of the first housing 110; then, clamping grooves matched with the buckles are formed in the periphery of the inner wall of the second shell 120; during installation, the snap on the first housing 110 is snapped into the corresponding snap groove on the second housing 120, and then the edge is sealed with glue. The bottom of the first shell 110 is provided with a mounting hole matched with the heat-conducting metal sheet 111; in assembling, the heat conductive metal sheets 111 are placed in the corresponding mounting holes and then bonded using glue. The temperature detection chip 112 includes a micro control unit and a thermistor; the temperature detection chip 112 is disposed on the heat conductive metal sheet 111. Specifically, the thermistor of the temperature detection chip 112 is closely attached to the heat conductive metal sheet 111. A bobbin 121 integrally formed with the second housing 120 is disposed in the second housing 120, the bobbin 121 is used for winding a metal coil, and the metal coil is connected to the temperature detection chip 112; the bobbin 121 is further provided with a hollow through hole 1211, and the sensor can be mounted at the interface of the device to be tested after the alloy sheet 200 passes through the through hole 1211. When the interface of the equipment to be tested is electrified, the alloy sheet 200 generates a magnetic field, and the electromagnetic field passes through the metal coil; the magnetic field of the metal coil changes to generate electric energy; then drives the temperature detection chip 112 after passing through the voltage stabilization rectification circuit. After detecting the resistance value of the thermistor, the micro-control unit on the temperature detection chip 112 calculates a corresponding temperature value according to the correlation coefficient of the thermistor; then, the wireless transceiver module 113 is activated to transmit the detected temperature value to the remote monitoring terminal. In order to avoid the influence on the detection result of the temperature detection chip 112 caused by the operation of the metal coil, a partition plate 300 is disposed on the first casing 110 between the temperature detection chip 112 and the bobbin 121; the partition plate 300 is hermetically coupled to the first housing 110.
The wireless transceiver module 113 can be a 433MHz low power consumption transceiver module, which can ensure the transmission distance of the sensor and reduce the power consumption of the sensor. In one embodiment, the transmitting power of the wireless transceiver module 113 is set to 10dbm, and the maximum communication distance can reach 300 meters.
In an embodiment, a glue filling hole 1111 may be further disposed on the heat conducting metal sheet 111, and after the first housing 110 and the second housing 120 are assembled, the heat conducting glue may be filled into an area between the temperature detecting unit and the heat conducting metal sheet 111 through the glue filling hole 1111; carry out heat conduction better, make detection effect better, also can prevent damp simultaneously.
In order to facilitate the installation of the sensor, the second housing 120 is further provided with an L-shaped step 122, so that the L-shaped step can facilitate the adjustment of the position of the sensor during the installation, and also facilitate the installation in a small installation space.
The overall size of the mutual inductance type wireless temperature sensor 100 provided by the embodiment of the application is 25mm × 10mm (length × width × height); the start-up current of the temperature detection chip 112 is 5A, and the sleep current is 1.2 uA. The temperature measuring range is-30 ℃ to 150 ℃; the measurement precision is +/-0.5 ℃; the temperature measurement time interval may be set to 30 s. It should be noted that the temperature measurement time interval can also be adjusted remotely through the wireless transceiver module 113 according to actual requirements.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a temperature detection device according to an embodiment of the present disclosure.
The present application also provides a temperature detection device 10 using the mutual inductance wireless temperature sensor 100. The temperature detection device 10 comprises an alloy sheet 200 and a mutual inductance type wireless temperature sensor 100 arranged on the alloy sheet 200 in a penetrating way; when in use, the sensor can be mounted on an interface of a device to be tested by using the alloy sheet 200.
In one embodiment, the length of alloy sheet 200 may be adjusted; then, excess portions are cut off, and both ends of the alloy piece 200 are welded together.
In another embodiment, a hollow ferrule 220 may be sleeved on the alloy sheet; two ends of the alloy sheet 200 are stacked in the clamping sleeve 220, and then a screw hole perpendicular to the alloy sheet 200 is arranged on the clamping sleeve 220. When the alloy sheet 200 is installed, the size of the alloy sheet 200 is adjusted, and then the two ends of the alloy sheet 200 are screwed by using bolts corresponding to the screw holes.
In order to prevent the alloy sheet 200 from loosening and affecting the detection effect of the mutual inductance type wireless temperature sensor 100, silica gel anti-slip pads 210 can be arranged on the alloy sheets 200 at the two sides of the mutual inductance type wireless temperature sensor 100; meanwhile, in order to improve the anti-slip effect, the contact surface between each silica gel anti-slip pad 210 and the device to be tested can be provided with silica gel anti-slip teeth 211.
In summary, the embodiment of the present application provides a mutual inductance type wireless temperature sensor and a temperature detection device, including a first housing and a second housing; the second shell is covered on the first shell; a heat conducting metal sheet is arranged on the bottom surface of the first shell; a temperature detection chip is arranged on the heat-conducting metal sheet; the temperature detection chip is connected with a wireless transceiving module; a bobbin integrally formed with the second shell is arranged in the second shell; a metal coil is wound on the bobbin; the metal coil is electrically connected with the temperature detection chip; the bobbin is also provided with a hollow through hole; a partition plate is arranged between the temperature detection chip and the bobbin; the partition plate is hermetically connected with the first shell; the partition plate is connected with the second shell in a sealing mode. By the mode, a coil framework does not need to be arranged on the PCB, so that the wiring is more convenient; meanwhile, the size of the PCB is reduced, and the size of the sensor can be reduced. The coil and the temperature detection chip are isolated by the partition plate, and the temperature detection accuracy can be improved.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (8)
1. A mutual inductance type wireless temperature sensor is characterized by comprising a first shell and a second shell; the second shell is covered on the first shell; a heat-conducting metal sheet is arranged on the bottom surface of the first shell; a temperature detection chip is arranged on the heat-conducting metal sheet; the temperature detection chip is connected with a wireless transceiving module; a bobbin integrally formed with the second shell is arranged in the second shell; a metal coil is wound on the bobbin; the metal coil is electrically connected with the temperature detection chip; the winding reel is also provided with a hollow through hole; a partition plate is arranged on the first shell between the temperature detection chip and the winding reel; the partition plate is connected with the first shell in a sealing mode.
2. A mutual inductance type wireless temperature sensor according to claim 1, wherein said second housing is provided with L type steps.
3. The mutual inductance type wireless temperature sensor according to claim 1, wherein the wireless transceiver module is a 433MHz low power consumption transceiver module.
4. The mutual inductance type wireless temperature sensor according to claim 1, wherein the heat conductive metal sheet is provided with a glue filling hole.
5. A temperature detection device comprising an alloy sheet and the mutual inductance type wireless temperature sensor according to any one of claims 1 to 4, which is provided in the alloy sheet.
6. The temperature detecting device according to claim 5, wherein silica gel anti-slip pads are disposed on the alloy sheets at two sides of the mutual inductance type wireless temperature sensor.
7. The temperature detecting device according to claim 6, wherein the silica gel non-slip mat is provided with a plurality of silica gel non-slip teeth.
8. The temperature detection device according to claim 5, wherein a hollow ferrule is sleeved on the alloy sheet; the alloy sheet is arranged in the clamping sleeve in a stacked mode at two ends, and the clamping sleeve is provided with a screw hole perpendicular to the alloy sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922202800.2U CN211013270U (en) | 2019-12-09 | 2019-12-09 | Mutual inductance type wireless temperature sensor and temperature detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922202800.2U CN211013270U (en) | 2019-12-09 | 2019-12-09 | Mutual inductance type wireless temperature sensor and temperature detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211013270U true CN211013270U (en) | 2020-07-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922202800.2U Active CN211013270U (en) | 2019-12-09 | 2019-12-09 | Mutual inductance type wireless temperature sensor and temperature detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211013270U (en) |
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Denomination of utility model: A mutual inductance wireless temperature sensor and temperature detection device Effective date of registration: 20201117 Granted publication date: 20200714 Pledgee: Chengdu SME financing Company Limited by Guarantee Pledgor: CHENGDU WANBO INTELLIGENT ELECTRIC POWER TECHNOLOGY Co.,Ltd. Registration number: Y2020980008102 |