CN213814410U - Frequency converter control panel test equipment, system and electronic device - Google Patents
Frequency converter control panel test equipment, system and electronic device Download PDFInfo
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- CN213814410U CN213814410U CN202120324626.3U CN202120324626U CN213814410U CN 213814410 U CN213814410 U CN 213814410U CN 202120324626 U CN202120324626 U CN 202120324626U CN 213814410 U CN213814410 U CN 213814410U
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Abstract
The utility model provides a frequency converter control panel test equipment, a system and an electronic device, which relate to the field of frequency converter control panel test, wherein the frequency converter control panel test equipment comprises a signal measurement device, a signal given device and an upper computer which are connected with each other; the signal measurement equipment is used for checking an output signal of the frequency converter control panel to be measured; the signal given equipment is used for verifying the input signal of the frequency converter control panel to be tested; the upper computer is used for controlling the port and the test signal of the frequency converter control panel to be tested and determining the test result of the frequency converter control panel to be tested. The frequency converter control panel testing equipment can realize interaction between the upper computer and a tested circuit board by communicating numerical values corresponding to analog signals while outputting the analog signals through the signal measuring equipment, the signal giving equipment and the upper computer, so that the analog signals can be checked, and measurement of a multiplexing port is realized.
Description
Technical Field
The utility model belongs to the technical field of the test of converter control panel and specifically relates to a converter control panel test equipment, system and electron device are related to.
Background
The test of the frequency converter control panel is a complicated work, the types and the number of the interfaces to be tested are large, and the analog interfaces are required to be checked. Because the same port in the frequency converter control board can realize both digital and analog functions, and one interface can support both voltage and current signals, it is necessary that the test equipment can be compatible with these functions. For the analog interface, because the same signal has a certain detection deviation corresponding to different boards due to the discrete type of the device, the interface needs to be initialized, and the initialization process is very complicated.
In summary, in the test process of the frequency converter control board in the prior art, a means for performing analog signal test verification on the same functionally multiplexed port is absent.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a converter control panel test equipment, system and electron device can realize passing through communication with the numerical value that analog signal corresponds and realize alternately between host computer and the circuit board being tested when exporting analog signal through signal measurement equipment, signal setting equipment and host computer to can carry out the check-up to analog signal, realized measuring multiplexing port.
In a first aspect, the embodiment of the utility model provides a converter control panel test equipment is provided, this converter control panel test equipment includes: the device comprises signal measuring equipment, signal giving equipment and an upper computer;
the signal output end of the upper computer is connected with the input port of the frequency converter control panel to be tested through signal given equipment; the output port of the frequency converter control panel to be tested is connected with the signal input end of the upper computer through the signal measuring equipment; the bidirectional data port of the upper computer is connected with the bidirectional data port of the frequency converter control panel to be tested;
the signal measuring equipment is used for verifying the output signal of the frequency converter control panel to be tested;
the signal given equipment is used for verifying the input signal of the frequency converter control panel to be tested;
and the upper computer is used for controlling the port and the test signal of the frequency converter control panel to be tested and determining the test result of the frequency converter control panel to be tested.
In some embodiments, the above frequency converter control board testing apparatus further includes: a channel control circuit; the output end of the channel control circuit is respectively connected with the upper computer and the signal given equipment; the input end of the channel control circuit is connected with a frequency converter control panel to be tested;
and the channel control circuit is used for determining the type of the input signal of the frequency converter control panel to be tested.
In some embodiments, the channel control circuit includes: a signal switching circuit and a signal conversion circuit; the input end of the signal switching circuit and the input end of the signal conversion circuit are respectively connected with an upper computer; the output end of the signal switching circuit and the output end of the signal conversion circuit are respectively connected with a control panel of the frequency converter to be tested;
the signal switching circuit is used for switching the input signals to obtain the signal types supported by the control panel of the frequency converter to be tested;
and the signal conversion circuit is used for converting the input signal to obtain the signal type supported by the control panel of the frequency converter to be tested.
In some embodiments, when the input signal of the frequency converter control board to be tested is measured, the signal measuring equipment is disconnected from the upper computer and the frequency converter control board to be tested.
In some embodiments, when the output signal of the frequency converter control board to be tested is measured, the signal given equipment is disconnected from the upper computer and the frequency converter control board to be tested.
In some embodiments, when the input signal of the frequency converter control board to be tested is checked, the signal measurement equipment is disconnected from the upper computer and the frequency converter control board to be tested.
In some embodiments, a host computer, comprising: a display device;
the display device is used for displaying the test result of the frequency converter control panel.
In some embodiments, a host computer, comprising: a comparison unit;
the comparison unit is used for comparing the test signal of the frequency converter control panel to be tested with a preset threshold value and determining the test result of the frequency converter control panel to be tested.
In a second aspect, the embodiment of the present invention provides a frequency converter control panel test system, this system includes: initializing equipment and testing equipment; the initialization equipment is used for initializing the frequency converter control panel to be tested; the test equipment is the frequency converter control board test equipment mentioned in the first aspect, and is used for testing the frequency converter control board.
In a third aspect, an embodiment of the present invention provides an electronic device, which includes the frequency converter control board testing system mentioned in the second aspect.
The embodiment of the utility model provides a following beneficial effect has been brought:
the utility model provides a converter control panel test equipment, system and electron device, this converter control panel test equipment includes: the device comprises signal measuring equipment, signal giving equipment and an upper computer; the signal output end of the upper computer is connected with the input port of the frequency converter control panel to be tested through signal setting equipment; the output port of the frequency converter control panel to be tested is connected with the signal input end of the upper computer through the signal measuring equipment; the bidirectional data port of the upper computer is connected with the bidirectional data port of the frequency converter control panel to be tested; the signal measuring equipment is used for checking the output signal of the frequency converter control panel to be tested; the signal given equipment is used for verifying the input signal of the frequency converter control panel to be tested; the upper computer is used for controlling the port and the test signal of the frequency converter control panel to be tested and determining the test result of the frequency converter control panel to be tested. The frequency converter control panel testing equipment can realize interaction between the upper computer and a tested circuit board by communicating numerical values corresponding to analog signals while outputting the analog signals through the signal measuring equipment, the signal giving equipment and the upper computer, so that the analog signals can be checked, and measurement of a multiplexing port is realized.
Other features and advantages of the invention will be set forth in the description which follows, or in part may be learned by the description or may be learned by practice of the invention.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a testing apparatus for a frequency converter control board according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a frequency converter control board testing apparatus including a channel control circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a channel control circuit according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a second frequency converter control board testing apparatus provided in an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a third testing apparatus for a control board of a frequency converter according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a frequency converter control board test system according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Icon:
100-a signal measurement device; 200-a signal-given device; 300-an upper computer; 400-frequency converter control panel to be tested; 500-channel control circuitry; 510-a signal switching circuit; 520-a signal conversion circuit; 10-initializing the device; 20-test equipment; 30-a frequency converter control board test system; 101-a processor; 102-a memory; 103-a bus; 104-communication interface.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The test of the frequency converter control panel is a complicated work, the types and the number of the interfaces to be tested are large, and the analog interfaces are required to be checked. Because the same port in the frequency converter control board can realize both digital and analog functions, and one interface can support both voltage and current signals, it is necessary that the test equipment can be compatible with these functions. For the analog interface, because the same signal has a certain detection deviation corresponding to different boards due to the discrete type of the device, the interface needs to be initialized, and the initialization process is very complicated.
In summary, in the test process of the frequency converter control board in the prior art, a means for performing analog signal test verification on the same functionally multiplexed port is absent.
Based on this, the embodiment of the utility model provides a converter control panel test equipment, system and electron device can realize passing through signal measurement equipment, signal setting equipment and host computer and realizing the numerical value that analog signal corresponds and passing through communication and interacting between host computer and the circuit board being tested when exporting analog signal to can carry out the check-up to analog signal, realized measuring multiplexing port.
In order to understand the present embodiment, a detailed description is first given to a testing apparatus for a frequency converter control board disclosed in an embodiment of the present invention.
Referring to fig. 1, a frequency converter control board test apparatus includes: the device comprises a signal measuring device 100, a signal giving device 200 and an upper computer 300;
the signal output end of the upper computer 300 is connected with the input port of the frequency converter control board 400 to be tested through the signal setting equipment 200; the output port of the frequency converter control board 400 to be tested is connected with the signal input end of the upper computer 300 through the signal measuring equipment 100; the bidirectional data port of the upper computer 300 is connected with the bidirectional data port of the frequency converter control board 400 to be tested;
the signal measuring equipment 100 is used for checking the output signal of the frequency converter control board 400 to be tested;
the signal setting equipment 200 is used for verifying the input signal of the frequency converter control board 400 to be tested;
and the upper computer 300 is used for controlling the port and the test signal of the frequency converter control board 400 to be tested and determining the test result of the frequency converter control board 400 to be tested.
The upper computer 300 performs bidirectional transmission when transmitting data or instructions to the signal measurement equipment 100, the signal setting equipment 200 and the frequency converter control board 400 to be tested; the signal given device 200 transmits data or instructions to the frequency converter control board 400 to be tested in a single direction; unidirectional data transmission is also performed between the frequency converter control board 400 to be tested and the signal measurement equipment 100.
As can be known from the frequency converter control board testing device shown in fig. 1, the frequency converter control board testing device can realize interaction between the upper computer and the tested circuit board through communication of the numerical values corresponding to the analog signals while outputting the analog signals through the signal measuring device, the signal giving device and the upper computer, so that the analog signals can be verified, and measurement of the multiplexing port is realized.
In the specific implementation process of the frequency converter control board test, a port to be tested needs to be determined through a communication mode. If the test signal is the multiplex port, the upper computer determines the type of the signal to be tested and outputs a response signal and the multiplex port by controlling an external signal; if the signals are digital and analog signals, the equipment is given by a control signal; if the communication interface and the multiplexing of digital and analog signals are used, the test signal cannot be simply given by one device, and the test signal needs to be given by a different device. If only several types of signals are directly connected together, signal output errors or equipment damage can be caused, at the moment, switching between different signals can be realized by adding a channel control circuit, and meanwhile, equipment damage is avoided. As shown in fig. 2, in some embodiments, the frequency converter control board testing apparatus further includes: a channel control circuit 500; the output end of the channel control circuit 500 is connected with the upper computer 300 and the signal given device 200 respectively; the input end of the channel control circuit 500 is connected with the frequency converter control board 400 to be tested; and the channel control circuit 500 is used for determining the type of the input signal of the control board of the frequency converter to be tested.
Specifically, as shown in fig. 3, the channel control circuit 500 includes: a signal switching circuit 510 and a signal conversion circuit 520; the input end of the signal switching circuit 510 and the input end of the signal conversion circuit 520 are respectively connected with the upper computer 300; the output end of the signal switching circuit 510 and the output end of the signal conversion circuit 520 are respectively connected with the frequency converter control board 400 to be tested;
the signal switching circuit 510 is configured to switch the input signal to obtain a signal type supported by the frequency converter control board 400 to be tested;
the signal conversion circuit 520 is configured to convert the input signal to obtain a signal type supported by the frequency converter control board 400 to be tested.
In some embodiments, when the input signal of the frequency converter control board to be tested is measured, the signal measuring equipment is disconnected from the upper computer and the frequency converter control board to be tested. As shown in fig. 4, at this time, the upper computer 300 performs an analog signal input process on the frequency converter control board 400 to be tested, and the upper computer 300 performs unidirectional data transmission with the signal setting device 200; the signal given equipment 200 and the frequency converter control board 400 to be tested carry out unidirectional data transmission; the frequency converter control panel 400 to be tested and the upper computer 300 are in bidirectional data transmission; similarly, when the input signal of the frequency converter control board 400 to be tested is checked, the signal measurement device 100 is disconnected from the upper computer 300 and the frequency converter control board 400 to be tested. The measurement and verification are two different operations, but the signal measurement device 100 is disconnected from the upper computer 300 and the frequency converter control board 400 to be tested.
In some embodiments, when the output signal of the frequency converter control board to be tested is measured, the signal given equipment is disconnected from the upper computer and the frequency converter control board to be tested. Specifically, as shown in fig. 5, at this time, the upper computer 300 performs a process of checking the analog signal output of the frequency converter control board 400 to be tested, and the upper computer 300 performs unidirectional data transmission with the signal measurement device 100; the signal measurement equipment 100 and the frequency converter control board 400 to be measured perform one-way data transmission; the frequency converter control board 400 to be tested and the upper computer 300 are in bidirectional data transmission.
In some embodiments, the upper computer 300 includes: a display device; the display device is used for displaying the test result of the frequency converter control panel. Host computer 300 still includes: a comparison unit; the comparison unit is used for comparing the test signal of the frequency converter control panel to be tested with a preset threshold value and determining the test result of the frequency converter control panel to be tested.
Specifically, in the process of measuring the input signal, the upper computer 300 determines a port to be tested and a test value, and transmits information to the frequency converter control board 400 to be tested through communication, and controls the signal giving device 200 to output a response value, and the frequency converter control board 400 to be tested detects the signal value and compares the signal value with the given value to determine whether the frequency converter control board 400 to be tested is correct, and transmits the test result to the upper computer 300 to be displayed.
In the process of measuring the output signal, the upper computer 300 determines a port to be tested and a test value, and transmits the port to be tested and the test value to the frequency converter control board 400 to be tested through communication, the frequency converter control board 400 to be tested outputs the test port and the test value determined according to the communication, the signal measuring equipment 100 transmits a detection result to the upper computer 300 through communication, and the upper computer 300 compares and judges whether the detection result is correct and displays the detection result.
In the process of checking the output signal, the upper computer 300 communicates with the frequency converter control board 400 to be tested to determine the port to be tested, and simultaneously reads the measurement result of the signal measurement device 100 through communication and transmits the measurement result back to the frequency converter control board 400 to be tested through communication, and the frequency converter control board 400 to be tested checks the analog output by comparing the difference between the given value and the output value.
In the process of checking the input signal, the upper computer 300 communicates with the frequency converter control board 400 to be tested to determine the port to be tested, and simultaneously, the upper computer 300 transmits the analog value to be given to the frequency converter control board 400 to be tested through communication. Meanwhile, the upper computer 300 controls the signal giving equipment 200 to output corresponding analog signals, and the frequency converter control board 400 to be tested detects the analog signals and compares the analog signals with values read by communication to check analog input.
In the above process, the port to be tested is determined by a communication method. If the test signal is a multiplex port, the upper computer 300 communicates to determine the type of the signal to be tested, and outputs a response signal and the multiplex port by controlling an external signal; it is sufficient if digital and analog signals are given to the device 200 by control signals; if the communication interface is multiplexed with digital and analog signals, the test signal cannot be simply given by one device, but needs to be given by a different device. However, if only several types of signals are directly connected together, the signals are output wrongly or the devices are damaged, and in this case, the channel control circuit 500 can be used to easily switch between different signals, and the damage of the devices is avoided.
As can be known from the frequency converter control board test equipment mentioned in the above embodiments, the frequency converter control board test equipment can change the type of the input signal through the control channel control circuit, and controls the frequency converter control board to be tested and the signal measurement equipment to perform signal output verification by using communication; and controlling the frequency converter control board to be tested and the signal given equipment to carry out input signal verification through the upper computer. The signal measurement device, the signal setting device and the upper computer are used for outputting the analog signals and meanwhile achieving interaction between the upper computer and the circuit board to be tested through communication of the numerical values corresponding to the analog signals, so that the analog signals can be verified, and measurement of the multiplexing port is achieved.
The embodiment of the utility model provides a converter control panel test system, the schematic structural diagram of this system is shown in fig. 6, initialization equipment 10 and test equipment 20; the initialization equipment 10 is used for initializing a frequency converter control panel to be tested; the test device 20 is the frequency converter control board test device mentioned in the above embodiments, and is used for testing the frequency converter control board.
The test equipment in the embodiment has the same technical characteristics as the test equipment for the frequency converter control board provided in the above embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved. For the sake of brevity, where not mentioned in the section of the embodiments, reference may be made to the corresponding matters in the foregoing embodiments.
The embodiment of the utility model provides an electronic device, this electronic device's schematic structure is shown in fig. 7, and this electronic device includes the converter control panel test system 30 that above-mentioned embodiment mentioned. The electronic device comprises a processor 101 and a memory 102; the memory 102 is used for storing one or more computer instructions, and the one or more computer instructions are executed by the processor to implement the control process of the frequency converter control board test system 30.
The electronic device shown in fig. 7 further comprises a bus 103 and a communication interface 104, the processor 101, the communication interface 104 and the memory 102 being connected via the bus 103.
The Memory 102 may include a high-speed Random Access Memory (RAM) and may also include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. Bus 103 may be an ISA bus, PCI bus, EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one double-headed arrow is shown in FIG. 7, but this does not indicate only one bus or one type of bus.
The communication interface 104 is configured to connect with at least one user terminal and other network units through a network interface, and send the packaged IPv4 message or IPv4 message to the user terminal through the network interface.
The processor 101 may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware or instructions in the form of software in the processor 101. The Processor 101 may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component. The steps and logic blocks disclosed in embodiments of the present disclosure may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The processes disclosed in connection with the embodiments of the present disclosure may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 102, and the processor 101 reads the information in the memory 102 and completes the steps of the test process of the foregoing embodiment in combination with the hardware thereof.
In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of devices or units through some communication interfaces, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the technical solution of the present invention, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still modify or easily conceive of changes in the technical solutions described in the foregoing embodiments or make equivalent substitutions for some technical features within the technical scope of the present disclosure; such modifications, changes or substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The utility model provides a converter control panel test equipment which characterized in that, converter control panel test equipment includes: the device comprises signal measuring equipment, signal giving equipment and an upper computer;
the signal output end of the upper computer is connected with the input port of the frequency converter control panel to be tested through the signal given equipment; the output port of the frequency converter control panel to be tested is connected with the signal input end of the upper computer through the signal measuring equipment; the bidirectional data port of the upper computer is connected with the bidirectional data port of the frequency converter control panel to be tested;
the signal measuring equipment is used for checking the output signal of the frequency converter control panel to be tested;
the signal given equipment is used for verifying the input signal of the frequency converter control panel to be tested;
and the upper computer is used for controlling the port and the test signal of the frequency converter control panel to be tested and determining the test result of the frequency converter control panel to be tested.
2. The inverter control board test apparatus of claim 1, further comprising: a channel control circuit; the output end of the channel control circuit is respectively connected with the upper computer and the signal given equipment; the input end of the channel control circuit is connected with the frequency converter control panel to be tested;
and the channel control circuit is used for determining the type of the input signal of the frequency converter control panel to be tested.
3. The inverter control board test apparatus of claim 2, wherein the channel control circuit comprises: a signal switching circuit and a signal conversion circuit; the input end of the signal switching circuit and the input end of the signal conversion circuit are respectively connected with the upper computer; the output end of the signal switching circuit and the output end of the signal conversion circuit are respectively connected with the frequency converter control panel to be tested;
the signal switching circuit is used for switching the input signals to obtain the signal types supported by the frequency converter control panel to be tested;
and the signal conversion circuit is used for converting the input signal to obtain the signal type supported by the control panel of the frequency converter to be tested.
4. The inverter control board test apparatus according to claim 1, wherein the signal measurement apparatus disconnects the upper computer and the inverter control board under test when measuring the input signal of the inverter control board under test.
5. The inverter control board test device according to claim 2, wherein the signal giving device disconnects the upper computer and the inverter control board to be tested when measuring the output signal of the inverter control board to be tested.
6. The inverter control board testing device according to claim 1, wherein the signal measuring device disconnects the upper computer and the inverter control board to be tested when an input signal of the inverter control board to be tested is checked.
7. The frequency converter control board test equipment of claim 1, wherein the upper computer comprises: a display device;
the display device is used for displaying the test result of the frequency converter control panel.
8. The frequency converter control board test equipment of claim 1, wherein the upper computer comprises: a comparison unit;
the comparison unit is used for comparing the test signal of the frequency converter control panel to be tested with a preset threshold value and determining the test result of the frequency converter control panel to be tested.
9. A frequency converter control board test system, the system comprising: initializing equipment and testing equipment; the initialization equipment is used for initializing the frequency converter control panel to be tested; the test equipment is the frequency converter control board test equipment mentioned in any one of the above claims 1 to 8, and is used for testing the frequency converter control board.
10. An electronic device, characterized in that the electronic device comprises the frequency converter control board test system of claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120324626.3U CN213814410U (en) | 2021-02-04 | 2021-02-04 | Frequency converter control panel test equipment, system and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120324626.3U CN213814410U (en) | 2021-02-04 | 2021-02-04 | Frequency converter control panel test equipment, system and electronic device |
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| CN213814410U true CN213814410U (en) | 2021-07-27 |
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| CN202120324626.3U Active CN213814410U (en) | 2021-02-04 | 2021-02-04 | Frequency converter control panel test equipment, system and electronic device |
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