CN210893480U - Shaft temperature alarm testing device - Google Patents
Shaft temperature alarm testing device Download PDFInfo
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- CN210893480U CN210893480U CN201922128061.7U CN201922128061U CN210893480U CN 210893480 U CN210893480 U CN 210893480U CN 201922128061 U CN201922128061 U CN 201922128061U CN 210893480 U CN210893480 U CN 210893480U
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Abstract
The utility model discloses an axle temperature alarm testing arrangement, include: the single-chip microcomputer is connected with the main control unit, the single-chip microcomputer is further connected with the shaft temperature alarm to be tested, the main control unit is used for sending a simulation temperature detection signal to the single-chip microcomputer, and the single-chip microcomputer sends the simulation temperature detection signal to the shaft temperature alarm to be tested. The utility model provides a shaft temperature alarm testing arrangement has improved efficiency of software testing and detection precision.
Description
Technical Field
The embodiment of the utility model provides a relate to test technical field, especially relate to an axle temperature alarm testing arrangement.
Background
With the development of railway construction in China, the number of locomotives used is increased sharply, and more attention is paid to safe operation of the locomotives. The locomotive axle plays a crucial role in bearing and moving parts of the locomotive, and in the running process of the locomotive, the axle needs to be detected in real time, and the axle temperature alarm is a key device for reflecting the running condition of the axle in real time. At present the testing arrangement of axle temperature alarm includes bath temperature groove and axle temperature sensor, adopt bath temperature groove analog temperature environment, detect the temperature in bath temperature groove through axle temperature sensor, and send the temperature detected signal to the axle temperature alarm, the axle temperature alarm shows current temperature according to the temperature detected signal, temperature through showing the axle temperature alarm compares with the temperature of bath temperature groove simulation, thereby accomplish the test to the axle temperature alarm, adopt the device to test the axle temperature alarm, work load is big, detection time is long, detection error is big, be difficult to satisfy industrialization and automated inspection requirement.
SUMMERY OF THE UTILITY MODEL
The utility model provides an axle temperature alarm testing arrangement to improve efficiency of software testing and detect the precision.
The embodiment of the utility model provides an axle temperature alarm testing arrangement, include:
the system comprises a singlechip and a main control unit;
the single chip microcomputer is connected with the main control unit and the shaft temperature alarm to be tested;
the main control unit is used for sending an analog temperature detection signal to the single chip microcomputer;
and the single chip microcomputer sends the analog temperature detection signal to the shaft temperature alarm to be tested.
Optionally, the single chip microcomputer is configured to send each analog temperature sensor number to the to-be-tested shaft temperature alarm when acquiring a query instruction sent by the to-be-tested shaft temperature alarm, acquire the analog temperature sensor number specified by the to-be-tested shaft temperature alarm for querying, acquire the analog temperature detection signal sent by the main control unit according to the analog temperature sensor number specified by the to-be-tested shaft temperature alarm for querying, and send the analog temperature detection signal to the to-be-tested shaft temperature alarm.
Optionally, the single chip microcomputer is electrically connected with the shaft temperature alarm to be tested through a single bus.
Optionally, the single chip microcomputer is electrically connected with the main control unit through a serial communication interface.
Optionally, the main control unit further includes a display touch screen;
the display touch screen is used for displaying an input interface of the simulated temperature detection signal.
Optionally, the analog temperature detection signal includes:
at least one of an analog temperature sensor short circuit, an analog temperature sensor open circuit, an analog temperature sensor sensing temperature range, and an analog temperature sensor sensing temperature interval.
Optionally, the shaft temperature alarm testing device provided by the embodiment of the utility model further comprises a power module;
the power module is respectively electrically connected with the single chip microcomputer and the main control unit and used for supplying power to the single chip microcomputer and the main control unit.
The embodiment of the utility model provides a technical scheme simulates temperature sensor output signal under operating condition through singlechip and main control unit and regards as simulation temperature detection signal to with simulation temperature detection signal transmission to the axle temperature alarm that awaits measuring, accomplish the capability test of axle temperature alarm, replace among the prior art use the axle temperature alarm detection device of bath temperature groove simulation temperature environment, improved the efficiency of software testing of axle temperature alarm and detected the precision.
Drawings
Fig. 1 is a schematic structural diagram of a shaft temperature alarm testing device provided in an embodiment of the present invention;
fig. 2 is a schematic flow chart of a testing method of the shaft temperature alarm provided by the embodiment of the present invention;
fig. 3 is a schematic flow chart of another testing method for an axle temperature alarm provided by the embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is the embodiment of the utility model provides a shaft temperature alarm testing arrangement's that provides structural schematic diagram, as shown in fig. 1, the embodiment of the utility model provides a shaft temperature alarm testing arrangement includes singlechip 11 and main control unit 12. The single chip microcomputer 11 is connected with the main control unit 12, and the single chip microcomputer 11 is further connected with the shaft temperature alarm to be tested 13. The main control unit 12 is used for sending the analog temperature detection signal to the single chip microcomputer 11, and the single chip microcomputer 11 sends the analog temperature detection signal to the to-be-tested shaft temperature alarm 13.
Specifically, the single chip microcomputer 11 is connected with the main control unit 12, and can input a test parameter of a simulated temperature detection signal to the main control unit 12, the main control unit 12 sends the simulated temperature detection signal to the single chip microcomputer 11 according to the test parameter of the simulated temperature detection signal, the single chip microcomputer 11 sends the simulated temperature detection signal to the to-be-tested shaft temperature alarm 13, the to-be-tested shaft temperature alarm 13 performs synchronous temperature display or alarm according to the simulated temperature detection signal, the temperature display and alarm of the to-be-tested shaft temperature alarm 13 are compared with an input test command, and the test of the to-be-tested shaft temperature alarm 13 is completed.
The embodiment of the utility model provides a technical scheme simulates temperature sensor output signal under operating condition through singlechip 11 and main control unit 12 and regards as simulation temperature detected signal to with simulation temperature detected signal transmission to the examination axle temperature alarm 13 that awaits measuring, accomplish the capability test of counter axle temperature alarm, replace among the prior art use the axle temperature alarm detection device of bath temperature groove simulation temperature environment, improved the efficiency of software testing of axle temperature alarm and detected the precision.
Optionally, the single chip microcomputer 11 is configured to send each analog temperature sensor number to the to-be-tested shaft temperature alarm 13 when acquiring a query instruction sent by the to-be-tested shaft temperature alarm 13, acquire the analog temperature sensor number specified by the to-be-tested shaft temperature alarm 13 for query, acquire the analog temperature detection signal sent by the main control unit 12 according to the analog temperature sensor number specified by the to-be-tested shaft temperature alarm 13 for query, and send the analog temperature detection signal to the to-be-tested shaft temperature alarm 13.
Specifically, during testing, the shaft temperature alarm to be tested 13 sends a query instruction to the single chip microcomputer 11, and the single chip microcomputer 11 sends the query instruction to the main control unit 12 after receiving the query instruction. After the main control unit 12 receives the query command of the shaft temperature alarm 13 to be tested, the number and the corresponding serial number of the analog temperature sensors can be set through the main control unit 12, and the serial numbers of all the analog sensors are sent to the shaft temperature alarm 13 to be tested, the shaft temperature alarm 13 to be tested sends the serial number of the analog temperature sensor for appointed query to the single chip microcomputer 11 according to the serial number of the analog sensor, after the single chip microcomputer 11 receives the serial number of the analog temperature sensor for appointed query of the shaft temperature alarm 13 to be tested, the analog temperature detection signal is sent to the shaft temperature alarm 13 to be tested according to the analog temperature detection signal of the analog temperature sensor serial number preset by the main control unit 12 and the output signal of the analog temperature sensor, the shaft temperature alarm 13 to be tested carries out synchronous temperature display or alarm according to the analog temperature detection signal, and the temperature display and alarm of the shaft temperature alarm 13 to be tested and the analog temperature And comparing the temperature detection signals to finish the test of the shaft temperature alarm 13 to be tested. Illustratively, the shaft temperature alarm to be tested 13 sends a query instruction to the single chip microcomputer 11, and the single chip microcomputer 11 sends the query instruction to the main control unit 12 after receiving the query instruction. After the main control unit 12 receives the query command of the shaft temperature alarm to be tested 13, the main control unit 12 sets the number of analog temperature sensors to 10, the corresponding serial numbers to be 1-10, and sends the serial numbers 1-10 of all the analog sensors to the shaft temperature alarm to be tested 13, the shaft temperature alarm to be tested 13 sends the serial number of the analog temperature sensor to be queried to 1 to the singlechip 11 according to the serial numbers 1-10 of the analog sensors, after the singlechip 11 receives the serial number 1 of the analog temperature sensor to be queried of the shaft temperature alarm to be tested 13, the analog temperature detection signal is sent to the shaft temperature alarm to be tested 13 according to the analog temperature detection signal with the serial number of the analog temperature sensor preset by the main control unit 12 and the output signal of the analog temperature sensor, the shaft temperature alarm to be tested 13 performs synchronous temperature display or alarm according to the analog temperature detection signal, then, the shaft temperature alarm to be tested 13 sends an analog temperature sensor number 2 for appointed query to the single chip microcomputer 11, the single chip microcomputer 11 simulates an output signal of the temperature sensor according to an analog temperature detection signal with the analog temperature sensor number 2 preset through the main control unit 12, the analog temperature detection signal is sent to the shaft temperature alarm to be tested 13, and the like, the analog temperature query with the analog temperature sensor number 3-10 is completed, then the shaft temperature alarm to be tested 13 sends an analog temperature sensor number 1 for appointed query to the single chip microcomputer 11, the analog temperature of the analog sensor number 1-10 is queried in a circulating mode, and real-time temperature monitoring of a plurality of analog temperature sensors is achieved. And comparing the temperature display and alarm of the shaft temperature alarm 13 to be tested with the preset analog temperature detection signal of the analog temperature sensor number to finish the test of the shaft temperature alarm 13 to be tested.
With continued reference to fig. 1, optionally, the single chip microcomputer 11 is electrically connected to the shaft temperature alarm to be tested 13 through a single bus 15.
Specifically, as shown in fig. 1, the single bus 15 includes a single bus interface 151, the single bus interface 151 is disposed on the single chip microcomputer 11, the single bus interface 151 includes a power supply pin VCC, a data transmission pin RW and a first ground pin GND1, the power supply pin VCC is used for supplying power to the to-be-tested shaft temperature alarm 13, and the data transmission pin RW is used for transmitting clock and data between the single chip microcomputer 11 and the to-be-tested shaft temperature alarm 13. During testing, the singlechip 11 simulates the working time sequence of the single bus according to the simulated temperature detection signal, and completes command and data exchange between the singlechip 11 and the singlechip of the shaft temperature alarm to be tested 13. The single bus 15 adopts a single signal line, not only transmits clock but also transmits data, and the data transmission is bidirectional, so that the bus has the advantages of saving I/O port lines, simple resource structure, low cost, convenience for bus expansion and maintenance and the like.
With continued reference to fig. 1, optionally, the single chip microcomputer 11 is electrically connected to the main control unit 12 through a serial communication interface 16.
Illustratively, as shown in fig. 1, the single chip microcomputer 11 includes a serial communication interface 16, where the serial communication interface 16 is an RS-232 standard interface, the serial communication interface 16 includes a data receiving pin RXD, a data transmitting pin TXD and a second ground pin GND2, the data receiving pin RXD is used for receiving an analog temperature detection signal sent by the main control unit 12, and the data transmitting pin TXD is used for sending an inquiry command and an analog temperature sensor number sent by the shaft temperature alarm 13 to be tested to the main control unit 12. The single chip microcomputer 11 and the main control unit 12 are in full-duplex communication through a standard serial communication interface 16, signal lines are few, baud rate selection is flexible, transmission distance is long, and compatibility is high.
With continued reference to fig. 1, optionally, the main control unit 12 further includes a display touch screen 121, and the display touch screen 121 is used for displaying an input interface of the analog temperature detection signal.
Specifically, the display touch screen 121 is used for displaying an input interface of the analog temperature detection signal, and the analog temperature detection signal is set through the display touch screen 121 to complete human-computer interaction.
Optionally, the simulating the temperature detection signal includes: at least one of an analog temperature sensor short circuit, an analog temperature sensor open circuit, an analog temperature sensor sensing temperature range, and an analog temperature sensor sensing temperature interval.
Specifically, when the analog temperature detection signal is set as the analog temperature sensor short-circuit signal, the single chip microcomputer 11 simulates an output signal of the temperature sensor during short circuit, and when the shaft temperature alarm to be tested 13 detects the analog temperature sensor short-circuit signal, the short-circuit alarm is sent out and short-circuit information is displayed, for example, the serial number of the analog temperature sensor with short circuit is displayed; when the analog temperature detection signal is set to be the analog temperature sensor open circuit signal, the singlechip 11 simulates an output signal of the temperature sensor when the temperature sensor is open circuit, and when the shaft temperature alarm to be tested 13 detects the analog temperature sensor open circuit signal, an open circuit alarm is sent out and open circuit information is displayed, for example, the serial number of the analog temperature sensor which is open circuit is displayed; when the analog temperature detection signal is set to be the analog temperature sensor sensing temperature range and the analog temperature sensor sensing temperature interval, the single chip microcomputer 11 confirms the current analog temperature according to the analog temperature sensor sensing temperature range and the analog temperature sensor sensing temperature interval, the output signal of the analog temperature sensor at the current temperature is used as the analog temperature detection signal, the analog temperature detection signal is sent to the to-be-tested shaft temperature alarm 13, and after the to-be-tested shaft temperature alarm 13 receives the analog temperature detection signal of the single chip microcomputer 11, synchronous temperature display is carried out according to the analog temperature detection signal. For example, the temperature sensing range of the analog temperature sensor is set to be 0-100 ℃, the temperature sensing interval of the analog temperature sensor is set to be +5 ℃, the analog temperature starts from 0 ℃ and increases progressively at an interval of 5 ℃, the output signal of the analog temperature sensor of the singlechip 11 at the temperatures of 0 ℃, 5 ℃, 10 ℃ and the like is used as an analog temperature detection signal and is sent to the shaft temperature alarm to be tested 13, and if the performance of the shaft temperature alarm to be tested 13 is qualified, the shaft temperature alarm to be tested 13 correspondingly displays the temperature values of 0 ℃, 5 ℃, 10 ℃ and the like.
Continuing to refer to fig. 1, optionally, the embodiment of the utility model provides an axle temperature alarm testing arrangement still includes power module 14, and power module 14 is connected with singlechip 11 and main control unit 12 electricity respectively for supply power to singlechip 11 and main control unit 12.
For example, as shown in fig. 1, the single chip microcomputer 11 includes a first power interface 111, the first power interface 111 includes a +12V power input pin and a third ground pin GND3, and the power module 14 supplies a +12V power to the single chip microcomputer 11 through the first power interface 111; the main control unit 12 includes a second power interface 122, the second power interface 122 includes a +24V power input pin and a fourth ground pin GND4, and the power module 14 provides +24V power to the main control unit 12 through the second power interface 122.
To sum up, the embodiment of the utility model provides a high-efficient, accurate axle temperature alarm testing arrangement is applicable to the maintenance and the performance measurement work of electric locomotive axle temperature alarm. The embodiment of the utility model provides a shaft temperature alarm testing arrangement, constitute simulation temperature sensor by singlechip 11 and monobus drive, receive the inquiry instruction of examination shaft temperature alarm 13 that awaits measuring, serial number and simulation temperature scope through main control unit 12 setting simulation temperature sensor, test parameters such as simulation temperature sensor sensing temperature scope and simulation temperature sensor sensing temperature interval, singlechip 11 issues the serial number of all analog sensor to examination shaft temperature alarm 13, and receive the simulation temperature sensor serial number of the appointed inquiry of examination shaft temperature alarm 13 that awaits measuring, singlechip 11 simulates digital temperature sensor's of normal work output signal and gives simulation temperature sensor's serial number and temperature signal, and the simulation temperature that will show simulation temperature sensor's serial number and temperature signal detects signal transmission to examination shaft temperature alarm 13, examination shaft temperature alarm 13 that awaits measuring shows simulation temperature sensor's serial number and temperature signal according to simulation temperature and detects signal transmission to await measuring shaft temperature alarm 13 And sending a high-temperature alarm of the temperature sensor when the simulated temperature is higher than a preset threshold value.
The single chip microcomputer 11 can also simulate the output signal of a digital temperature sensor with a fault, such as the output signal of the temperature sensor when an open circuit fault occurs and the output signal of the temperature sensor when a short circuit fault occurs, and at the moment, the shaft temperature alarm 13 to be tested should correspondingly send out a temperature sensor open circuit alarm or a temperature sensor short circuit alarm.
The main control unit 12 communicates with the single chip microcomputer 11 through an RS232 interface, the main control unit 12 sends a simulation temperature detection signal to the single chip microcomputer 11, and meanwhile the main control unit 12 receives and displays the device running state and the running parameters uploaded by the single chip microcomputer 11. The main control unit 12 includes a display touch screen 121, and after the main control unit 12 receives the query instruction sent by the to-be-tested shaft temperature alarm 13 and the analog temperature sensor number specified for query, the main control unit 12 gives an analog temperature detection signal indicating the number and temperature of the analog temperature sensor, and synchronously displays the number and temperature or fault signal of the analog temperature sensor on the display touch screen 121, and the corresponding to-be-tested shaft temperature alarm 13 should also display the number and temperature of the analog temperature sensor synchronously.
The embodiment of the utility model provides an axle temperature alarm testing arrangement, adopt singlechip 11 and main control unit 12 simulation normal temperature sensor and trouble temperature sensor's output signal as simulation temperature detection signal, and will simulate temperature detection signal transmission to the examination axle temperature alarm 13 that awaits measuring, can be real-time quick, the wide range, accomplish locomotive axle temperature alarm's temperature sensor temperature display comprehensively, temperature sensor high temperature alarm, temperature sensor opens circuit the warning, the test of functions such as temperature sensor short circuit warning, adopt the modularized design, accord with the requirement of industrial production, system operation safe and reliable, it is high to detect the precision, moreover, the steam generator is simple in structure, high durability and convenient use, manual participation in the testing process has been reduced, the degree of automation is high, furthest's reduction operation personnel's intensity of labour.
Based on the same inventive concept, the embodiment of the present invention further provides a shaft temperature alarm testing method, the explanation of the same or corresponding structure and terms as the above-mentioned embodiment is not repeated herein, fig. 2 is the embodiment of the present invention provides a flow diagram of a shaft temperature alarm testing method, as shown in fig. 2, the method includes the following steps:
and S110, the main control unit sends a simulation temperature detection signal to the single chip microcomputer.
And S120, the single chip microcomputer sends the analog temperature detection signal to a to-be-tested shaft temperature alarm.
The embodiment of the utility model provides a shaft temperature alarm test method simulates temperature sensor output signal under operating condition through singlechip and main control unit and regards as simulation temperature detected signal to with simulation temperature detected signal transmission to the shaft temperature alarm that awaits measuring, accomplish the capability test of shaft temperature alarm, replace among the prior art use the shaft temperature alarm detection method of bath temperature groove simulation temperature environment, improved the efficiency of software testing and the detection precision of shaft temperature alarm.
Fig. 3 is the flow chart of another axle temperature alarm test method that the embodiment of the utility model provides, as shown in fig. 3, it is optional, before the master control unit sends the simulation temperature detection signal to the singlechip, still include:
s210, the single chip microcomputer obtains a query instruction sent by the shaft temperature alarm to be tested.
And S220, the singlechip sends the serial numbers of the simulated temperature sensors to the shaft temperature alarm to be tested.
And S230, the shaft temperature alarm to be tested sends the serial number of the analog temperature sensor to be inquired to the single chip microcomputer.
And S240, the single chip microcomputer sends an analog temperature detection signal input instruction to the main control unit according to the appointed inquired analog temperature sensor number.
Specifically, during testing, the shaft temperature alarm to be tested sends a query instruction to the single chip microcomputer, and the single chip microcomputer sends the query instruction to the main control unit after receiving the query instruction. After the main control unit receives the query command of the shaft temperature alarm to be tested, the number and the corresponding serial number of the analog temperature sensors can be set through the main control unit, and the serial numbers of all the analog sensors are sent to the shaft temperature alarm to be tested, the shaft temperature alarm to be tested sends the serial number of the analog temperature sensor to be queried to the single chip microcomputer according to the serial number of the analog sensor to be queried, after the single chip microcomputer receives the serial number of the analog temperature sensor to be queried of the shaft temperature alarm to be tested, an analog temperature detection signal input command is sent to the main control unit according to the serial number of the analog temperature sensor to be queried by the shaft temperature alarm, the analog temperature detection signal of the serial number of the analog temperature sensor is input through the main control unit, the single chip microcomputer simulates the output signal of the temperature sensor according, and the shaft temperature alarm to be tested performs synchronous temperature display or alarm according to the analog temperature detection signal, compares the temperature display and alarm of the shaft temperature alarm to be tested with the input analog temperature detection signal of the analog temperature sensor number, and completes the test of the shaft temperature alarm to be tested.
Optionally, the simulating the temperature detection signal includes: at least one of an analog temperature sensor short circuit, an analog temperature sensor open circuit, an analog temperature sensor sensing temperature range, and an analog temperature sensor sensing temperature interval.
The embodiment of the utility model provides a science, it is reliable, efficient axle temperature alarm test method, output signal through singlechip and main control unit simulation normal temperature sensor and trouble temperature sensor is as simulation temperature detection signal, and with simulation temperature detection signal transmission to the axle temperature alarm that awaits measuring, it is real-time quick, the wide range, accomplish the temperature sensor temperature display of locomotive axle temperature alarm comprehensively, temperature sensor high temperature warning, temperature sensor alarm that opens circuit, the test of functions such as temperature sensor short circuit warning, the artifical participation in the testing process has been reduced, the degree of automation is high, furthest's reduction operating personnel's intensity of labour.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (7)
1. The utility model provides a shaft temperature alarm testing arrangement which characterized in that includes:
the system comprises a singlechip and a main control unit;
the single chip microcomputer is connected with the main control unit and the shaft temperature alarm to be tested;
the main control unit is used for sending an analog temperature detection signal to the single chip microcomputer;
and the single chip microcomputer sends the analog temperature detection signal to the shaft temperature alarm to be tested.
2. The shaft temperature alarm testing device according to claim 1, wherein the single chip microcomputer is configured to send the serial numbers of the analog temperature sensors to the shaft temperature alarm to be tested when acquiring the query instruction sent by the shaft temperature alarm to be tested, acquire the serial number of the analog temperature sensor to be queried by the shaft temperature alarm to be tested, acquire the analog temperature detection signal sent by the main control unit according to the serial number of the analog temperature sensor to be queried by the shaft temperature alarm to be tested, and send the analog temperature detection signal to the shaft temperature alarm to be tested.
3. The axle temperature alarm testing device of claim 1, wherein the single chip microcomputer is electrically connected with the axle temperature alarm to be tested through a single bus.
4. The shaft temperature alarm testing device according to claim 1, wherein the single chip microcomputer is electrically connected with the main control unit through a serial communication interface.
5. The axle temperature alarm testing device of claim 1, wherein the master control unit further comprises a display touch screen;
the display touch screen is used for displaying an input interface of the simulated temperature detection signal.
6. The axle temperature alarm testing device of claim 1, wherein the simulated temperature detection signal comprises:
at least one of an analog temperature sensor short circuit, an analog temperature sensor open circuit, an analog temperature sensor sensing temperature range, and an analog temperature sensor sensing temperature interval.
7. The test device of claim 1, further comprising a power module;
the power module is respectively electrically connected with the single chip microcomputer and the main control unit and used for supplying power to the single chip microcomputer and the main control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922128061.7U CN210893480U (en) | 2019-12-02 | 2019-12-02 | Shaft temperature alarm testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922128061.7U CN210893480U (en) | 2019-12-02 | 2019-12-02 | Shaft temperature alarm testing device |
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| Publication Number | Publication Date |
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| CN210893480U true CN210893480U (en) | 2020-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922128061.7U Active CN210893480U (en) | 2019-12-02 | 2019-12-02 | Shaft temperature alarm testing device |
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| CN (1) | CN210893480U (en) |
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- 2019-12-02 CN CN201922128061.7U patent/CN210893480U/en active Active
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