CN222028406U - Multi-synchronous testing device of digital multimeter instrument - Google Patents
Multi-synchronous testing device of digital multimeter instrument Download PDFInfo
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- CN222028406U CN222028406U CN202323641090.6U CN202323641090U CN222028406U CN 222028406 U CN222028406 U CN 222028406U CN 202323641090 U CN202323641090 U CN 202323641090U CN 222028406 U CN222028406 U CN 222028406U
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- 238000012360 testing method Methods 0.000 title claims abstract description 85
- 238000004891 communication Methods 0.000 claims abstract description 18
- 230000001360 synchronised effect Effects 0.000 claims abstract description 14
- 238000012546 transfer Methods 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 2
- 238000007689 inspection Methods 0.000 description 20
- 238000012795 verification Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000013500 data storage Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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Abstract
The utility model discloses a multi-synchronous testing device of a digital multimeter instrument, which comprises a PC end, a standard instrument connected with the PC end, an adapter plate and a plurality of instruments to be tested, wherein the adapter plate is provided with at least one input end and a plurality of testing interfaces for connecting the instruments to be tested; one input end of the adapter plate is connected with the signal output end of the standard instrument, and the test interface of the adapter plate is detachably connected with a plurality of instruments to be tested so as to synchronously transfer test signals of the standard instrument to the plurality of instruments to be tested. The utility model realizes the synchronous test of multiple devices through USB and RS232 interfaces, and is suitable for various scenes needing digital instrument communication.
Description
Technical Field
The utility model relates to the technical field of instrument and meter testing, in particular to a multi-synchronous testing device of a digital multimeter instrument.
Background
Most of the current electronic product testing schemes test a plurality of different devices to be tested one by using the same testing machine. In the current test mode, a tester manually connects an RS-232 transmission line from a test machine to an RS-232 input port of an instrument to be tested, and then controls the test machine to start sending test instructions to the instrument to be tested. After the test of one instrument to be tested is completed, a tester must pull out the RS-232 transmission line from the RS-232 input port of the instrument to be tested and insert the RS-232 input port of another instrument to be tested, so that the next instrument to be tested can be tested. One of the main drawbacks of the prior art is that only a single instrument to be tested can be tested at a time.
Disclosure of utility model
The utility model aims to provide a plurality of synchronous testing devices of a digital multimeter instrument. One standard instrument can serve a plurality of instruments to be tested at the same time, signals generated by the standard instruments are allowed to be distributed to each instrument to be tested through the processing of the signal adapter plate, and therefore synchronous testing of multiple devices is achieved.
The technical scheme adopted by the utility model is as follows:
The synchronous testing device comprises a PC end, a standard instrument connected with the PC end, an adapter plate and a plurality of instruments to be tested, wherein the adapter plate is provided with at least one input end and a plurality of testing interfaces for connecting the instruments to be tested; one input end of the adapter plate is connected with the signal output end of the standard instrument, and the test interface of the adapter plate is detachably connected with a plurality of instruments to be tested so as to synchronously transfer test signals of the standard instrument to the plurality of instruments to be tested.
Further, the PC side is in communication connection with a remote server, and a storage unit for storing test data is configured on the server.
Further, a plurality of inspection templates are configured on the server for the PC end to call, and the inspection templates are template files configured in advance for different test instruments.
Furthermore, the connection mode of the PC end and the standard instrument, the adapter plate and the instrument to be tested is compatible with rs232 and USB communication connection, and a modebus protocol and a SCPI standard protocol are configured on the PC end.
Further, the standard instrument is a voltage and current standard output source, and outputs a voltage and current signal to the instrument to be tested; such as the FLUKE5560A instrument.
Further, the adapter plate comprises a shell and a relay switching circuit arranged in the shell, wherein the surface of the shell is provided with a USB interface electrically connected with the relay switching circuit, four voltage and current interfaces of a standard instrument connected to the left side and two instrument interfaces to be tested on the upper side and the lower side of the right side; the PC end is in communication connection with the adapter plate through the USB interface, a relay switching circuit is arranged on the adapter plate, and the test interface is switched to a voltage signal, a current signal or a non-conducting state through the relay switching circuit.
The utility model adopts the technical proposal and has the following technical advantages: 1) Compared with other one-to-one inspection schemes, the utility model greatly reduces the time loss by utilizing multiple threads by adopting one standard instrument to correspond to a plurality of instruments to be inspected, and can not accelerate by 4 times, but can also increase the speed by 2 to 3 times, thereby greatly reducing the time cost. The work of the switching wire is reduced, and the switching plate is used for switching the series connection and the parallel connection through the relay, so that the voltage and current switching is realized. 2) The utility model adopts full-automatic inspection, only requires the specification of wiring of inspection personnel, and other inspection on instruments can be performed by an inspection system, so that high requirements on the inspection personnel are avoided. The system test has stability compared with manual test, and can eliminate manual erroneous judgment. 4) The standard instrument to be tested is required to be used, the system can be used for synchronously standardizing the uniformity of the instrument to be tested, whether the standard instrument is used for testing indexes, testing schemes and tests, the manual subconscious testing mode is avoided, and the standard instrument to be tested can be maintained more normally. 5) The data can be stored, and the data can be traced back when being analyzed when being beneficial to test, so that the conditions of missing test, multiple tests and forgetting test can be avoided.
The utility model realizes the high-efficiency communication with the digital test equipment through the USB and the RS232 interface, and is suitable for various scenes needing to carry out digital instrument communication.
Drawings
The utility model is described in further detail below with reference to the drawings and detailed description;
FIG. 1 is a schematic diagram of a digital multimeter apparatus of the present utility model having multiple synchronous test devices;
fig. 2 is a schematic structural diagram of an interposer of the present utility model.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.
As shown in fig. 1 or 2, the utility model discloses a multiple synchronous testing device of a digital multimeter instrument, which comprises a PC end, a standard instrument connected with the PC end, an adapter plate and a plurality of instruments to be tested, wherein the adapter plate is provided with at least one input end and a plurality of testing interfaces for connecting the instruments to be tested; one input end of the adapter plate is connected with the signal output end of the standard instrument, and the test interface of the adapter plate is detachably connected with a plurality of instruments to be tested so as to synchronously transfer test signals of the standard instrument to the plurality of instruments to be tested.
Further, the PC side is in communication connection with a remote server, and a storage unit for storing test data is configured on the server.
Further, a plurality of inspection templates are configured on the server for the PC end to call, and the inspection templates are template files configured in advance for different test instruments.
Furthermore, the connection mode of the PC end and the standard instrument, the adapter plate and the instrument to be tested is compatible with rs232 and USB communication connection, and a modebus protocol and a SCPI standard protocol are configured on the PC end.
Further, the standard instrument is a voltage and current standard output source, and outputs a voltage and current signal to the instrument to be tested; such as the FLUKE5560A instrument.
Further, as shown in fig. 2, the adapter plate comprises a housing and a relay switching circuit arranged in the housing, wherein the surface of the housing is provided with a USB interface electrically connected with the relay switching circuit, four voltage and current interfaces of a standard instrument on the left side and two interfaces to be tested on the upper and lower sides of the right side; the PC end is in communication connection with the adapter plate through the USB interface, a relay switching circuit is arranged on the adapter plate, and the test interface is switched to a voltage signal, a current signal or a non-conducting state through the relay switching circuit.
The following is a detailed description of the specific principles of the present utility model:
The utility model mainly uses Python as a core programming language, uses multithreading to control the relay to switch the series-parallel connection through the adapter plate, and uses the SCPI control instrument of the instrument to switch the gear position and read back the numerical value to judge whether the instrument data passes or not and whether the instrument data accords with the factory index.
As shown in fig. 1, the whole system is composed of 8 units, namely a server, a PC end, a standard instrument, an adapter plate and instruments 1, 2, 3 and 4 to be tested.
The server is mainly used for connecting with the PC, and two purposes are achieved after the connection: ① Remote transmission of inspection templates: the verification template is placed on the server, so that a plurality of PCs can share one template, when the verification template is to be used, the verification template is called through the local area network, and if the verification template is to be changed, only one template is to be modified. ② Preservation of test data: when the instrument is inspected, inspection data are generated at the moment, inspection staff, whether the instrument passes through the information and the like, and the information is stored on the server through the local area network, so that the data can be stored, the data storage is facilitated, the data loss is prevented from being local, and the instrument can be accessed by multiple persons.
The PC is the main body of the system, and the computer needs to be connected with a local area network, so that the server can be connected, but the system can also support the local area network in the extreme test environment, and the data can not be uploaded to the server. The PC also needs to be connected to standard instruments, patch panel devices, and instruments to be tested, so that a standard test module can be formed. The connection mode of the PC, the standard instrument, the adapter plate and the instrument to be tested is compatible with rs232 and USB communication connection, and the communication protocol is modebus protocol and SCPI standard protocol.
The standard instrument is a voltage and current standard output source, such as a FLUKE5560A instrument, and the standard instrument is used as an output source to output signals such as voltage and current and the like and is transmitted to an instrument to be measured for measurement. It should be noted that the precision of the standard source instrument needs to be greater than that of the instrument to be measured, so that the error range is within the allowable range. The control of the standard is mainly GPIB and RS232, and through the control of the SCPI instruction, the system only needs to collect the instruction in advance, when encountering the corresponding instrument, reads IDN, acquires system information, distinguishes the type of the instrument, and calls the corresponding instruction, thereby achieving the purpose of controlling a plurality of instruments by one system.
The adapter plate is a transfer station for outputting standard instrument signals, and is also one of the keys of the system. The working principle is that an interface is connected with signal output of a standard instrument, the series connection and the parallel connection are carried out through a relay control circuit, the series connection is current operation, the parallel connection is voltage operation, then a signal is converted into a plurality of signals to be output, the purpose that the standard instrument is used for a plurality of instruments to be tested is achieved, and the efficiency is greatly improved. The adapter plate is RS232 communication, can flexibly control various conditions such as voltage output, current mode channel 1 output, current channel 2 output, no output and the like, and meets the production environment. The simple structure of the adapter plate is shown in fig. 2, and the adapter plate is switched to voltage and current or is not conducted through a relay by a USB interface, four voltage and current interfaces of a standard instrument connected to the left side, and four instrument interfaces to be tested on the right side.
The instrument to be tested needs to be padded with many things: the digital multimeter is needed to communicate and has a definite communication protocol, so that systematic testing work can be performed. Compared with other modes of inspection, the system has the greatest characteristics that a plurality of instruments to be tested can be driven, and the control of the plurality of instruments is a key place, and the gear switching, information reading and other works of the instruments are synchronously controlled through the python multithreading principle, so that the efficient operation can be realized. And then sending a conclusion according to the read-back numerical value and the maximum and minimum value ranges given in the template back to the server and recording. Thus forming a closed loop.
Summarizing the workflow: when the workflow is started, the gear control and the information read-back of the instrument to be tested are controlled according to the template, the output of the standard instrument is controlled, the control of the adapter plate is carried out, the template is transmitted to the server, and then the work can be started on any PC with a local area network. And each piece of software takes the template from the local area network to the server, controls the instrument, reads back the data, judges the passing of the data, and finally returns the data back to the server.
In general, the utility model constructs a precise automated test framework to achieve efficient communication control of the instrument under test. Through the cooperation with the standard output equipment and the signal adapter plate, the utility model can accurately decouple and distribute signals. In the process of signal transfer, the utility model skillfully utilizes the basic electrical principle of constant voltage in the parallel circuit and constant current in the serial circuit, thereby realizing the generation of multiple signals through a single output signal and ensuring that each signal can be accurately transmitted to a corresponding test instrument.
The core test flow mainly surrounds the accurate verification of voltage and current. The test script automatically adjusts the instrument to be tested to a proper working gear according to a rule document compiled in advance. Once the setting is finished, the system immediately starts to collect output data of the instrument to be measured, and performs comparison analysis with a predefined parameter range in the rule document so as to judge whether each instrument meets the passing standard.
The whole test flow is accurate and highly automated, and the requirement of manual operation is greatly reduced. After the test is finished, the result is automatically uploaded to a database system in the local area network, so that convenience is provided for data storage and analysis, and meanwhile, the traceability and reliability of the result are ensured. Through the flow, the utility model provides a high-efficiency and reliable solution for instrument testing, and the efficiency and the accuracy of testing operation are obviously improved.
The utility model adopts the technical proposal and has the following technical advantages: 1) Compared with other one-to-one inspection schemes, the utility model greatly reduces the time loss by utilizing multiple threads by adopting one standard instrument to correspond to a plurality of instruments to be inspected, and can not accelerate by 4 times, but can also increase the speed by 2 to 3 times, thereby greatly reducing the time cost. The work of the switching wire is reduced, and the switching plate is used for switching the series connection and the parallel connection through the relay, so that the voltage and current switching is realized. 2) The utility model adopts full-automatic inspection, only requires the specification of wiring of inspection personnel, and other inspection on instruments can be performed by an inspection system, so that high requirements on the inspection personnel are avoided. The system test has stability compared with manual test, and can eliminate manual erroneous judgment. 4) The standard instrument to be tested is required to be used, the system can be used for synchronously standardizing the uniformity of the instrument to be tested, whether the standard instrument is used for testing indexes, testing schemes and tests, the manual subconscious testing mode is avoided, and the standard instrument to be tested can be maintained more normally. 5) The data can be stored, and the data can be traced back when being analyzed when being beneficial to test, so that the conditions of missing test, multiple tests and forgetting test can be avoided.
The utility model realizes the high-efficiency communication with the digital test equipment through the USB and the RS232 interface, and is suitable for various scenes needing to carry out digital instrument communication.
It will be apparent that the described embodiments are some, but not all, embodiments of the application. Embodiments of the application and features of the embodiments may be combined with each other without conflict. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the detailed description of the embodiments of the application is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323641090.6U CN222028406U (en) | 2023-12-29 | 2023-12-29 | Multi-synchronous testing device of digital multimeter instrument |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323641090.6U CN222028406U (en) | 2023-12-29 | 2023-12-29 | Multi-synchronous testing device of digital multimeter instrument |
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| Publication Number | Publication Date |
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| CN222028406U true CN222028406U (en) | 2024-11-19 |
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| CN202323641090.6U Active CN222028406U (en) | 2023-12-29 | 2023-12-29 | Multi-synchronous testing device of digital multimeter instrument |
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| CN (1) | CN222028406U (en) |
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2023
- 2023-12-29 CN CN202323641090.6U patent/CN222028406U/en active Active
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