CN219736611U - Motor temperature monitoring device - Google Patents
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Abstract
The motor temperature monitoring device comprises an RFID passive temperature measuring tag, an RFID signal receiving antenna, a controller and a terminal, wherein the RFID passive temperature measuring tag is arranged on the outer side of a motor shell, the RFID signal receiving antenna and the RFID passive temperature measuring tag are arranged at intervals and in opposite directions, the controller is electrically connected with the RFID signal receiving antenna, and the terminal is in communication connection with the controller; the RFID signal receiving antenna collects temperature data collected by the RFID passive temperature measuring tag in a signal coverage range through a wireless radio frequency signal, and the temperature data are transmitted to the terminal through the controller for monitoring and displaying. The RFID signal receiving antenna reads out the tag data stored in the tag, and the controller directly transmits information to the terminal equipment, so that a user can continuously and conveniently measure and record temperature data without manual measurement, and real-time online monitoring and high-temperature early warning of the motor temperature are realized.
Description
Technical Field
The utility model belongs to the field of motor monitoring, and relates to a motor temperature monitoring device.
Background
The motor is a large category of mechanical equipment, and covers important engineering fields such as power, electric power, chemical industry, metallurgy, mine, machinery manufacturing and the like, such as generators, steam turbines, gas turbines, fans, water pumps, high-power speed-regulating type fluid couplings and the like. Such large machinery is often the key equipment in a factory.
The traditional motor generally comprises a motor rotor, a motor stator and a motor body, a large amount of heat is generated by the motor in the working process of the motor body, the internal temperature of the motor is higher, if the heat is not timely emitted, the normal operation of the whole motor can be influenced, the working condition state of the motor not only influences the operation of the equipment, but also influences the follow-up production, especially when the motor is in a high-speed operation state for a long time, due to the influence of various random factors, mechanical faults can be avoided, especially when the temperature of the motor rises too fast or reaches a warning value, if corresponding measures are not immediately taken, the insulation performance of an insulating layer wrapped by a stator core can be reduced, even insulation breakdown is caused, malignant power failure accidents are caused, the existing motor temperature detection simply depends on manual timing to measure the motor shell to obtain temperature data, the technicians can be difficult to find temperature abnormality timely, and intelligent real-time monitoring can not be realized.
Therefore, realizing the real-time on-line monitoring of the motor temperature is a technical problem to be solved by the technicians in the field.
Disclosure of Invention
In order to overcome the above-mentioned drawbacks of the prior art, an object of the present utility model is to provide a motor temperature monitoring device.
To achieve the above object, the solution of the present utility model is:
a motor temperature monitoring device, comprising:
the device comprises an RFID passive temperature measurement tag, an RFID signal receiving antenna, a controller and a terminal, wherein the RFID passive temperature measurement tag is arranged on the outer side of a motor shell, the RFID signal receiving antenna and the RFID passive temperature measurement tag are arranged at intervals and opposite to each other, the controller is electrically connected with the RFID signal receiving antenna, and the controller is in communication connection with the terminal so as to transmit a temperature signal to the terminal for monitoring and displaying; the RFID signal receiving antenna collects temperature data collected by the RFID passive temperature measuring tag in a signal coverage range through a wireless radio frequency signal, and the temperature data are transmitted to the terminal through the controller for monitoring and displaying.
In one embodiment, the controller is connected to the RFID signal receiving antenna through an RS232/485 serial communication line.
In one embodiment, the terminal communicates with the controller for remote data information viewing and management.
In one embodiment, the terminal is a smart phone, a tablet computer or a mobile inspection device.
In one embodiment, the RFID passive temperature measuring tag obtains electrical energy from the RFID signal receiving antenna placed in an electromagnetic or radio frequency field.
In one embodiment, the RFID passive temperature measurement tag is used for monitoring the temperature of the motor shell in real time, and the RFID passive temperature measurement tag is an ultrahigh frequency RFID tag chip of 860 MHz-960 MHz.
In one embodiment, the RFID signal receiving antenna includes a wireless radio frequency I/O module and a wireless radio frequency power supply module, which are respectively used for transmitting temperature measurement data and charging the RFID passive temperature measurement tag.
In one embodiment, the RFID signal receiving antenna is a rectangular parallelepiped box-like structure.
In one embodiment, the side of the RFID signal receiving antenna transmitting data is opposite to the RFID passive temperature measuring tag, and the distance between the RFID signal receiving antenna and the RFID passive temperature measuring tag is within 1.5m.
By adopting the scheme, the beneficial effects of the utility model include: the RFID passive temperature measurement tag can carry out passive temperature measurement on the motor, is sensitive and accurate in temperature measurement, convenient to install and quite wide in application range, after the RFID passive temperature measurement tag collects temperature data of a point to be measured of the motor, tag data stored in the tag are read out through an RFID signal receiving antenna, information is directly conveyed to terminal equipment through the controller, a user can continuously and conveniently measure and record the temperature data without manual measurement, functions of real-time online monitoring, high-temperature early warning, fault point positioning and the like of the motor temperature are realized, and direct basis is provided for fault reasons caused by the temperature by inquiring historical temperature data.
Drawings
Fig. 1 is a schematic structural diagram of a motor temperature monitoring device according to an embodiment of the present utility model.
Fig. 2 is a flow chart of a motor temperature monitoring method according to an embodiment of the utility model.
Fig. 3 is a block diagram of a motor temperature monitoring device according to an embodiment of the present utility model.
Fig. 4 is a block diagram of a configuration of an intelligent terminal according to an embodiment of the present utility model.
Detailed Description
Referring to fig. 1 and 3, for example, a motor temperature monitoring apparatus 10 includes an RFID passive temperature measurement tag 100, a network device 200 and a terminal, where the RFID passive temperature measurement tag 100 and an intelligent terminal 300 where a temperature data receiver is located perform wireless communication through the network device 200.
The network device 200 includes an RFID signal receiving antenna 210 and a controller 220, the RFID passive temperature measuring tag 100 is mounted on the outer side of the motor housing, the RFID signal receiving antenna 210 and the RFID passive temperature measuring tag 100 are spaced apart and are arranged opposite to each other, the controller 220 is electrically connected with the RFID signal receiving antenna 210, and the controller 220 is in communication connection with the terminal 300; the RFID signal receiving antenna collects temperature data collected by the RFID passive temperature measuring tag in a signal coverage range through wireless radio frequency signals, the RFID signal receiving antenna relays the received temperature signals to the controller, and the controller transmits the temperature information to the terminal for monitoring and displaying.
When the temperature measuring device is specifically used, the RFID passive temperature measuring tag is started to detect the temperature of a motor to be measured point, the RFID passive temperature measuring tag transmits a collecting signal to the RFID signal receiving antenna, the RFID signal receiving antenna receives the collecting signal and transmits collected temperature data to the controller, the controller transmits information of the temperature data to a communication unit of the controller, the communication unit wirelessly transmits the information to a terminal, when a corresponding application program on the terminal is opened, the terminal and the controller are in wireless communication, and the temperature data obtained by the measurement of the RFID passive temperature measuring tag are recorded and displayed. The terminal can display the recorded temperature data in visual forms such as curves, diagrams and the like, so that the user can conveniently check the temperature data. It should be understood that the corresponding application on the terminal is an existing display program.
In this embodiment, the RFID passive temperature measurement tag obtains electric energy from the RFID signal receiving antenna placed in the electromagnetic field or the radio frequency field, and part of the electric energy is stored in the energy storage capacitor of the RFID passive temperature measurement tag, the energy storage capacitor continuously accumulates electric energy, and the RFID passive temperature measurement tag is an ultra-high frequency RFID tag chip of 860 MHz-960 MHz, which does not need a battery, is powered wirelessly, is read wirelessly, has long service life, is maintenance-free, and is very suitable for use in a dangerous environment with high voltage/high current. The RFID passive temperature measuring tag provides energy through the ultrahigh frequency antenna, and passive non-contact communication is realized within a certain distance. The RFID (Radio FrequencyIdentification) radio frequency identification is a wireless communication technology, and the wireless communication end of the RFID (Radio FrequencyIdentification) radio frequency identification consists of an RFID signal receiving antenna and a tag (integrated with a modulator/demodulator and a temperature sensor). The RFID signal receiving antenna continuously transmits radio wave energy with specific frequency, and after the tag enters an electromagnetic field, the RFID signal receiving antenna transmits radio frequency signals, and data such as ID, temperature and verification are transmitted back by the energy obtained by the induction current. And the RFID signal receiving antenna decodes after reading the information sent by the tag, and completes wireless communication and data exchange.
Above-mentioned motor temperature monitoring device, the passive temperature measurement of RFID can carry out passive temperature measurement to the motor, and the temperature measurement is sensitive accurate, simple to operate, and application scope is very wide. After the RFID passive temperature measurement tag collects temperature data of a motor to-be-measured point, the controller directly transmits information to the terminal equipment, a user can continuously and conveniently measure and record the temperature data without manual measurement, functions of real-time on-line monitoring, high-temperature early warning, fault point positioning and the like of the motor temperature are realized, historical temperature data can be queried, and a direct basis is provided for fault reasons caused by the temperature.
Preferably, the controller is connected with the RFID signal receiving antenna through an RS232/485 serial communication line. The controller comprises a microprocessor, a system power module, an external communication module and a wireless transceiver module, wherein the system power module, the external communication module and the wireless transceiver module are mutually and electrically connected with the microprocessor; the controller can be an information collector or an upper computer.
Preferably, the terminal is in communication with the controller for remote data information viewing and management. The terminal is a smart phone, a tablet personal computer or mobile inspection equipment, a worker can acquire temperature data and historical data of the motor in real time through the smart phone or the tablet personal computer, and when the monitoring temperature of the motor is higher than 45 ℃, the system can send information to remind related personnel.
Preferably, the RFID signal receiving antenna comprises a signal conditioning module, a wireless radio frequency I/O module and a wireless radio frequency power supply module, wherein the wireless radio frequency I/O module is used for transmitting temperature measurement data, the wireless radio frequency power supply module charges the RFID passive temperature measurement tag, the wireless radio frequency I/O module is further connected with the memory through an I/O interface, the signal conditioning module comprises a radio frequency circuit, the radio frequency circuit adopts a CC1101 radio frequency integrated chip and comprises a transmitting power amplifier circuit, and the transmitting power amplifier circuit in the radio frequency circuit amplifies and then transmits the data. The radio frequency circuit works in the frequency range of 433 MHz-442 MHz, the transmitting power is 50MW, the transmitting current is less than or equal to 100mA, the receiving current is less than or equal to 25mA, and the sleeping current is less than or equal to 40uA; can work normally and stably for a long time under the working voltage of 3.0-3.6V.
Preferably, one side of the RFID signal receiving antenna for transmitting data is opposite to the RFID passive temperature measuring tag, and the distance between the RFID signal receiving antenna and the RFID passive temperature measuring tag is within 1.5m. The RFID signal receiving antenna is of a cuboid box-shaped structure.
Preferably, the device further comprises a buzzer, wherein the buzzer is electrically connected with the controller, and when the controller monitors that the temperature of the motor is greater than a threshold value in real time, if the threshold value is 50 ℃, the controller controls the buzzer to alarm so as to prompt the staff that the equipment is abnormal, so that the maintenance and the fault removal are convenient in time.
The utility model will be further described with reference to examples of embodiments shown in the drawings.
Example 1
The terminal equipment takes a mobile phone as an example, the system comprises an RFID passive temperature measurement tag, an RFID signal receiving antenna, a controller and the mobile phone, wherein one side of the RFID signal receiving antenna for transmitting data is opposite to the passive radio frequency identification temperature measurement tag, and the distance between the RFID signal receiving antenna and the passive radio frequency identification temperature measurement tag is 1.0m. The RFID passive temperature measurement tag is arranged on the motor shell to monitor the temperature of the shell in real time, the RFID signal receiving antenna is connected with the controller through a coaxial cable, the controller acquires the ID and temperature measurement data of the RFID passive temperature measurement tag, and the data is stored in the controller.
When the system works, the RFID passive temperature measuring tag detects temperature data of the motor shell and transmits the temperature data to the RFID signal receiving antenna, the RFID signal receiving antenna converts the acquired temperature data of analog quantity into digital quantity temperature data and transmits the digital quantity temperature data to the controller, the controller is provided with a communication module, the communication module transmits the temperature data to the mobile phone APP, workers can check the temperature condition of each motor shell at any time through the mobile phone APP, meanwhile, the mobile phone APP receives the temperature data of the motor to be measured point and compares the temperature characteristic value with a preset characteristic value, and if the temperature value exceeds the preset value, a fault early warning signal is sent to remind field workers of paying attention.
Example 2
The terminal equipment takes a computer as an example, and the system comprises an RFID passive temperature measurement tag, an RFID signal receiving antenna, a controller and a computer, wherein the RFID signal receiving antenna and the passive radio frequency identification temperature measurement tag are arranged in opposite directions, and the distance between the RFID signal receiving antenna and the passive radio frequency identification temperature measurement tag is 1.5m. The RFID passive temperature measurement tag is arranged on the motor shell to monitor the temperature of the shell in real time, temperature data are transmitted to the RFID signal receiving antenna, the RFID signal receiving antenna transmits the received temperature data to the controller, the controller is electrically connected with the computer through a cable to transmit the temperature data to the computer, the computer receives the temperature data of a to-be-measured point of the motor, the temperature characteristic value is compared with a preset characteristic value, and if the temperature value exceeds the preset value, a fault early warning signal is sent to remind field staff of paying attention.
It should be understood that the computer may also be used as a server, storing these data in the server to build a temperature information base. Staff's accessible cell-phone APP and this computer communication look over the temperature condition of each motor housing at any time, and the telephone number of responsible person can be bound in advance to the computer, sends the trouble early warning signal through the mode of SMS to remind on-the-spot staff to pay attention to.
In one embodiment, the intelligent terminal 300 may analyze and process the temperature data. As shown in fig. 2, a method for monitoring a temperature of a motor is provided, which is applied to the application environment in fig. 1, and is illustrated by taking a terminal 300 as an example, and the method may include the following steps:
step S1: acquiring temperature data of a motor shell in real time, and extracting a temperature characteristic value; the temperature data of the motor shell are collected in an RFID passive temperature measurement tag mode;
in the step, actually measured temperature data of an RFID passive temperature measurement tag arranged on a motor are received in real time, the temperature data are processed to obtain characteristic parameters represented by the temperature data, the characteristic parameters can be a temperature value and a temperature rising rate, the temperature rising rate is a temperature difference time sequence, and the temperature difference time sequence is represented by introducing a current motor temperature and a motor temperature difference parameter at the last moment. The RFID passive temperature measuring tag provides energy through the ultrahigh frequency antenna, and passive non-contact communication is realized within a certain distance.
Step S2: comparing the temperature characteristic value with a preset characteristic value, and sending out a fault early warning signal if the temperature characteristic value exceeds the preset characteristic value;
specifically, comparing the characteristic parameter represented by the temperature data with a preset characteristic value, outputting a result, and outputting a fault early warning signal according to the result, namely, if the temperature characteristic value exceeds the preset characteristic value, sending out the fault early warning signal. The preset characteristic value comprises a temperature threshold value and a speed threshold value, the temperature value is compared with the temperature threshold value, and if the temperature value exceeds the temperature threshold value, a fault early warning signal is sent out; and comparing the heating rate with a rate threshold, and if the heating rate exceeds the rate threshold, sending out a fault early warning signal.
Step S3: if the temperature characteristic value is smaller than the preset characteristic value, returning to the step S1.
Specifically, if the characteristic parameter represented by the temperature data is smaller than the preset characteristic value, returning to the step S1, and continuously collecting the current temperature data of the motor. If the temperature value is smaller than the temperature threshold value and the temperature rising rate is smaller than the rate threshold value, returning to the step S1.
The terminal 300 may be, but is not limited to, various personal computers, notebook computers, smartphones, tablet computers, and portable wearable devices, which may be head-mounted devices, etc.; the server may be implemented as a stand-alone server or as a server cluster composed of a plurality of servers.
Further, in some embodiments, step S1 comprises: acquiring temperature data of a motor in real time; carrying out Gaussian filtering treatment on the temperature data to obtain filtered temperature data; and extracting the temperature characteristic value of the filtered temperature data through an algorithm. The algorithm includes, but is not limited to, a binary algorithm time series analysis or a normalized weighted average algorithm, which is a conventional algorithm in the art, and the utility model does not improve the algorithm.
As shown in fig. 2, in one embodiment, before step S2, the method further includes:
step S11: acquiring historical temperature data of motor operation; the historical temperature data comprise temperature data in a normal state and temperature data in an abnormal state of the motor;
step S12: acquiring an abnormal data set according to the historical temperature data;
step S13: taking the abnormal data set as a training sample data set to train an initial warming abnormal model to be trained, and obtaining a trained warming abnormal model;
step S14: and determining a preset characteristic value of the motor according to the historical temperature data and the trained abnormal temperature rise model.
It should be understood that the preset feature value may be pre-stored in the intelligent terminal 300, may be input by the user and stored in the intelligent terminal 300, or may be stored in the intelligent terminal 300 after being operated by the user, and in one embodiment, the user may input the preset feature value into the intelligent terminal 300 through an input module of the intelligent terminal 300, for example, the input module includes an operation interface, and the input module of the intelligent terminal 300 may be a touch screen, a key and a display screen of the intelligent terminal 300 or other interfaces that may be used for the user to perform man-machine interaction, and the user may quickly input the preset feature value through the input module.
In one embodiment, the determining the preset characteristic value of the motor according to the historical temperature data and the abnormal temperature rise model includes: acquiring an abnormal temperature change rule from the temperature rise abnormal model; acquiring an abnormal temperature rising rate interval and an abnormal temperature interval according to an abnormal temperature change rule, so as to determine a temperature abnormal early warning rule of the motor; and determining a temperature threshold and a speed threshold according to the historical temperature data and the temperature abnormality early warning rule, and presetting characteristic values of a temperature threshold and a speed threshold motor. It should be appreciated that the rate threshold is greater than the maximum rate of motor normal temperature data.
Based on the same inventive concept, the embodiment of the utility model also provides a system for realizing the motor temperature monitoring method. The implementation of the solution provided by the system is similar to that described in the above method, so the specific limitation of one or more embodiments of the motor temperature monitoring system provided below may be referred to the limitation of the method of the motor temperature monitoring device hereinabove, and will not be repeated herein.
As shown in fig. 3, in some embodiments, there is provided a motor temperature monitoring system, the system comprising:
the temperature acquisition module 330 is used for acquiring temperature data in real time and extracting a temperature characteristic value;
the temperature comparing module 320 is electrically connected to the temperature collecting module 330, and is configured to compare the temperature characteristic value with a preset characteristic value, and output a comparison result;
the early warning module 310 is electrically connected to the temperature comparing module 320, and is configured to send out a fault early warning signal when the temperature characteristic value exceeds a preset characteristic value, and otherwise, output a normal state signal.
It should be understood that the system has a remote communication module with the controller 220, where the controller 220 may be a host computer, where the communication module includes one or more of WIFI and mobile network 2G/3G/4G/5G, for example, the temperature acquisition module 330 accesses the internet through the 5G mobile network and remotely accesses the wireless network where the controller is located through the internet, the temperature acquisition module 330 performs remote communication with the controller 220, and inputs a control command, and after the controller 220 receives the control command, the controller responds to the control command, and sends a control command to the RFID signal receiving antenna, so that the RFID signal receiving antenna feeds back temperature data according to the control command.
Specifically, when the system works, the terminal equipment takes a mobile phone as an example, the RFID passive temperature measurement tag detects temperature data of the motor shell and transmits the temperature data to the RFID signal receiving antenna, the RFID signal receiving antenna converts the acquired temperature data of analog quantity into digital quantity temperature data and transmits the digital quantity temperature data to the controller, the controller is provided with a communication module, the communication module transmits the temperature data to the mobile phone APP, a worker can check the temperature condition of each motor shell at any time through the mobile phone APP, meanwhile, the mobile phone APP receives the temperature data of a to-be-measured point of the motor and compares the temperature characteristic value with a preset characteristic value, and if the temperature value exceeds the preset value, a fault early warning signal is sent to remind the on-site worker.
As shown in fig. 4, in an embodiment, the system further includes a speaker 311, where the speaker 311 is electrically connected to the early warning module 310, and sends out an ultrasonic signal through the speaker 311 in a high-frequency sound, and when the early warning module monitors that the motor temperature is greater than a threshold in real time, for example, the threshold is 50 ℃, the early warning module controls the speaker to alarm to prompt a worker that the motor device is abnormal, so that the maintenance time is convenient to be timely or arranged. The speaker 311 is a sound generating device of the intelligent terminal 300, it should be understood that the existing intelligent mobile phone or computer is provided with the speaker 311, so that the implementation of sending ultrasonic signals on the mobile phone is extremely convenient, the multiplexing rate of equipment is greatly improved, no additional production equipment for sending ultrasonic waves is needed, and the construction cost of the system is greatly reduced.
In one embodiment, the temperature acquisition module 330 includes a temperature acquisition unit and a temperature feature unit, where the temperature acquisition unit is configured to acquire temperature data in real time; the temperature characteristic unit is used for carrying out Gaussian filtering processing on the temperature data to obtain filtered temperature data, and extracting a temperature characteristic value of the filtered temperature data through an algorithm.
In one embodiment, the temperature characteristic value includes a temperature value and a temperature rise rate, and the preset characteristic value includes a temperature threshold value and a rate threshold value.
In one embodiment, the system further comprises a preset feature determination module comprising:
the historical temperature data acquisition unit is used for acquiring historical temperature data of motor operation; the historical temperature data comprise temperature data in a normal state and temperature data in an abnormal state of the motor;
the abnormal data acquisition unit is used for acquiring an abnormal data set according to the historical temperature data;
the warming abnormal model construction unit is used for taking the abnormal data set as a training sample data set to train an initial warming abnormal model to be trained to obtain a trained warming abnormal model;
and the preset characteristic value determining unit is used for determining the preset characteristic value of the motor according to the historical temperature data and the trained abnormal temperature rise model.
Further, the preset feature value determining unit includes:
the temperature anomaly rule acquisition subunit is used for acquiring an anomaly temperature change rule from the temperature rise anomaly model;
the abnormal early warning rule acquisition subunit is used for acquiring an abnormal temperature rising rate interval and an abnormal temperature interval according to an abnormal temperature change rule so as to determine a temperature abnormal early warning rule of the motor;
and the threshold value determining subunit is used for determining a temperature threshold value and a speed threshold value according to the historical temperature data and the temperature abnormality early warning rule and presetting characteristic values of the temperature threshold value and the speed threshold value motor.
The embodiments are described above in order to facilitate the understanding and application of the present utility model by those of ordinary skill in the art. It will be apparent to those skilled in the art that various modifications can be readily made to these embodiments and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present utility model is not limited to the embodiments described herein, and those skilled in the art, based on the present disclosure, should make improvements and modifications without departing from the scope of the present utility model.
Claims (7)
1. A motor temperature monitoring device is characterized in that: the intelligent temperature measuring device comprises an RFID passive temperature measuring tag, an RFID signal receiving antenna, a controller and a terminal, wherein the RFID passive temperature measuring tag is arranged on the outer side of a motor shell, the RFID signal receiving antenna and the RFID passive temperature measuring tag are arranged at intervals and in opposite directions, the controller is electrically connected with the RFID signal receiving antenna, and the terminal is in communication connection with the controller;
the RFID signal receiving antenna collects temperature data collected by the RFID passive temperature measuring tag in a signal coverage range through a wireless radio frequency signal, and transmits the temperature data to a terminal through the controller for monitoring and displaying;
the RFID passive temperature measurement tag acquires electric energy from the RFID signal receiving antenna placed in the electromagnetic field or the radio frequency field, and the RFID signal receiving antenna comprises a wireless radio frequency I/O module and a wireless radio frequency power supply module which are respectively used for transmitting temperature measurement data and charging the RFID passive temperature measurement tag.
2. The motor temperature monitoring device of claim 1, wherein: the controller is connected with the RFID signal receiving antenna through an RS232/485 serial communication line.
3. The motor temperature monitoring device of claim 1, wherein: the terminal is communicated with the controller and used for remote data information viewing and management.
4. A motor temperature monitoring device according to claim 1 or 3, characterized in that: the terminal is a smart phone, a tablet computer or mobile inspection equipment.
5. The motor temperature monitoring device of claim 1, wherein: the RFID passive temperature measurement tag is used for monitoring the temperature of the motor shell in real time, and is an ultrahigh frequency RFID tag chip of 860 MHz-960 MHz.
6. The motor temperature monitoring device of claim 1, wherein: the RFID signal receiving antenna is of a cuboid box-shaped structure.
7. The motor temperature monitoring device of claim 1, wherein: the distance between the RFID signal receiving antenna and the RFID passive temperature measuring tag is within 1.5m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320667667.1U CN219736611U (en) | 2023-03-29 | 2023-03-29 | Motor temperature monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320667667.1U CN219736611U (en) | 2023-03-29 | 2023-03-29 | Motor temperature monitoring device |
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| Publication Number | Publication Date |
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| CN219736611U true CN219736611U (en) | 2023-09-22 |
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| CN202320667667.1U Active CN219736611U (en) | 2023-03-29 | 2023-03-29 | Motor temperature monitoring device |
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