CN202041623U - Tester for electromagnetic relays - Google Patents
Tester for electromagnetic relays Download PDFInfo
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- CN202041623U CN202041623U CN2011201271233U CN201120127123U CN202041623U CN 202041623 U CN202041623 U CN 202041623U CN 2011201271233 U CN2011201271233 U CN 2011201271233U CN 201120127123 U CN201120127123 U CN 201120127123U CN 202041623 U CN202041623 U CN 202041623U
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Abstract
The utility model relates to a tester for electromagnetic relays, which comprises an industrial flat computer, a digital multimeter, a program control voltage source, a time test module, a control module, a test mainboard and a connector, wherein the industrial flat computer is respectively connected with the digital multimeter, the program control voltage source and the control module through recommended standard 232 (RS232) interfaces, and the test mainboard is respectively connected with the digital multimeter, the program control voltage source, the time test module, the control module and the connector. The tester for the electromagnetic relays is a comprehensive test instrument which is capable of measuring various electromagnetic relays comprising as many as 8 sets of contacts, which realizes the full-automatic test on the parameters of the coil resistance, the actuating voltage, the contact resistance and the actuating time of the electromagnetic relays. The tester for the electromagnetic relays has the characteristics of high degree of automation, short test time, high test accuracy, small size, low cost and the like and can be widely applied to detecting the devices of the electromagnetic relays and screening the electromagnetic relays with higher reliability index requirements.
Description
Technical field
The utility model relates to a kind of electromagnetic relay tester, belongs to the technology of instrument and meter field, can be used for the test of electromagnetic relay, also is applicable to the test and the screening of Military Electromagnetic Relay.
Background technology
Electromagnetic relay (hereinafter to be referred as relay) is the electronic component of dynamo-electric combination, and the high insulation resistance of its off-state and the low on-resistance of on-state make other electronic devices and components to compare with it.Therefore in consumer electronic product and military electronics, obtained using widely.But owing to have a lot of operations still to adopt manual operations in the production run (particularly military relay) of relay, cause the quality conformance level relatively poor, in application process, often break down, become one of the poorest classification of reliability in the electronic component.Therefore relay is carried out strict test and screening becomes problem anxious to be solved.
Present domestic electronic product manufacturer mainly still depends on import equipment or adopts common apparatus that the every index of relay is carried out manual detection for the detection of relay.Import equipment is used for technical problem underlying that the detection of relay runs into to be exactly at the technical support of dissimilar relays tests and to safeguard the demand that is difficult to satisfy the user.Select for use general purpose test equipment to detect relay, method of testing complex operation, security and reliability are low, the judgement of test data, arrangement, statistics all need manually to carry out and data consistency poor, be difficult to satisfy the demand in market.Home products does not have to measure the contact resistance of all contacts comprehensively when measuring the contact resistance of electromagnetic relay; Aspect motion time measurement, generally all only test adhesive and trip time, can not reflect the action of relay all sidedly.
The utility model content
The problem that the utility model technology solves is: overcome the deficiencies in the prior art, provide a kind of can full-automatic testing electromagnetic relay line bag resistance, the full-automation test of operation voltage, contact resistance and actuation time, realization relay the key technical indexes, have the measuring accuracy height, test parameter is complete, cost is low, be easy to safeguard and be convenient to the intelligent electric magnetic relay tester of technical support, applicable to the user who produces or use electromagnetic relay.
Technical solution of the present utility model is: the electromagnetic relay tester, comprise industrial panel computer, digital multimeter, program-controlled voltage source, time test module, control module, testing host and connector, the industry panel computer is connected with digital multimeter, program-controlled voltage source and control module respectively by the RS232 interface, and testing host is connected with connector with digital multimeter, program-controlled voltage source, time test module, control module respectively.
Described time test module comprises FPGA system and time test interface, the FPGA system comprises MUX, time-to-digit converter and read-write controller, testing host is connected with MUX, time-to-digit converter and the read-write controller of FPGA system by the time test interface, and time-to-digit converter is connected with read-write controller with MUX respectively.
Described control module comprises DSP minimum system, exterior I/O spatial spread module, RS232 communication interface and control module IO interface, the DSP minimum system is connected with the control module IO interface with exterior I/O spatial spread module, RS232 communication interface respectively, the control module IO interface is connected with exterior I/O spatial spread module, testing host is connected with exterior I/O spatial spread module with the DSP minimum system by the control module IO interface, and industrial panel computer is connected with the DSP minimum system by the RS232 communication interface.
Described testing host comprises time test signal generation module, the contact resistance test module, the input and output isolation module, level switch module, the Test Switchboard array, attachment unit interface, the time test module interface, the control module interface, digital multimeter interface and control voltage interface, the Test Switchboard array respectively with time test signal generation module, the contact resistance test module, the input and output isolation module, attachment unit interface, the control module interface is connected with the digital multimeter interface, the input and output isolation module respectively with time test signal generation module, level switch module is connected with the Test Switchboard array, level switch module respectively with the input and output isolation module, the time test module interface is connected with the control voltage interface, the time test module is connected with the control voltage interface with level switch module respectively by the time test module interface, and control module is connected with level switch module with the time test module interface respectively by the control voltage interface.
Described contact resistance test module comprises signal generator, low-pass filter, power amplifier, constant current control module and signal processing module, signal generator is connected with low-pass filter, low-pass filter is connected with power amplifier with signal generator respectively, power amplifier is connected with the constant current control module with low-pass filter respectively, and the Test Switchboard array is connected with signal processing module with the constant current control module respectively.
The utility model compared with prior art beneficial effect is:
(1) the utility model adopts principal and subordinate's control mode, the industry panel computer links to each other with each functional module by RS232 serial communication mode, and the user only needs the programming option by upper computer software dispose the attribute of measured relay and technical parameter that parameter can be finished relay is automatically tested;
(2) the utility model image data is quick, accurate, precision is high, function is complete, reliability is high, has the manual testing and writes down incomparable superiority;
(3) the utility model has been chosen 8 groups of transfer contacts, can test all electromagnetic relays in the market, can also measure simultaneously the contact resistance of every group of stationary contact and moving contact and the exercises time parameter of contact action, thereby more present existing tester has bigger superiority;
(4) the utility model device of both having can be used for electromagnetic relay detects, and also can be used for having the screening of the electromagnetic relay of higher reliability index request;
(5) the utility model has stronger promotional value with respect to domestic like product function more comprehensively.
Description of drawings
Fig. 1 is a whole theory diagram of the present utility model;
Fig. 2 is the utility model time test module principle block diagram;
Fig. 3 is the utility model control module theory diagram;
Fig. 4 is the utility model testing host theory diagram;
Fig. 5 is the utility model contact resistance test module theory diagram;
Fig. 6 is the utility model upper computer software general flow chart;
Fig. 7 is the utility model line bag resistance test software flow pattern;
Fig. 8 is the utility model action voltage test software flow pattern;
Fig. 9 is the utility model electric shock resistance test software flow pattern;
Figure 10 is the utility model testing software actuation time process flow diagram.
Embodiment
The utility model is a model with 8 groups of transfer contacts, and comprehensively the contact resistance of quiet chalaza and moving chalaza is respectively organized in measurement, full test the exercises time of actuating of relay process.
The utility model as shown in Figure 1, comprise industrial panel computer 1, digital multimeter 2, program-controlled voltage source 3, time test module 4, control module 5, testing host 6 and connector 7, industry panel computer 1 is connected with digital multimeter 2, program-controlled voltage source 3 and control module 4 respectively by the RS232 interface, and testing host 6 is connected with digital multimeter 2, program-controlled voltage source 3, time test module 4, control module 5 and connector 7 by its corresponding interface respectively.
It is the PPC-104B panel computer that industry panel computer 1 has been selected the model of associating industry control for use, and digital multimeter 2 has been selected the U3402A of Agilent Technology for use, and program-controlled voltage source 3 has been selected the solid big PSM-6003 in Taiwan for use.
Industry panel computer 1 is a PC control platform of the present utility model, the user binds the information and the technical parameter of tested electromagnetic relay by the human-computer interaction interface of upper computer software, can finish Signal Regulation, measurement, test figure automatically and gather, stores and handle, generates automatically test report automatically.The main-process stream of upper computer software as shown in Figure 6, its center line bag resistance test, action voltage test, contact resistance test and actuation time testing process.The instruction that sends in the software flow all is to issue control module 5 by serial ports, and link order all is that control module 5 returns to host computer by serial ports.
Concrete test process is as follows:
1, p-wire bag resistance flow process as shown in Figure 7, thereby industry panel computer 1 generates control signal corresponding for control module 5 by RS232 serial ports sending controling instruction and gives testing host 6, behind mainboard 6 responsive control signals to be tested, the test data that industrial panel computer 1 comes read line bag resistance by RS232 serial ports control figure multimeter 2.
2, measure the operation voltage flow process as shown in Figure 8, thereby industry panel computer 1 generates control signal corresponding for control module 5 by RS232 serial ports sending controling instruction and gives testing host 6, after testing host 6 response instruction switched path formed corresponding test circuit, industrial panel computer 1 sent instruction on request and regulates its output voltage to program-controlled voltage source 3 and read the variation that program-controlled voltage puts on the corresponding state that electromagnetic relay line bag causes by control module 5 and measure operation voltage.
3, metering contact resistance flow process as shown in Figure 9, it is the rated voltage of tested electromagnetic relay that industry panel computer 1 sends instructions to program-controlled voltage source 3 its output voltages of control, send instruction by industrial panel computer 1 then and generate the corresponding test access that control signal removes to control testing host 6 to control module 5, send instruction control digital multimeter 2 read test data by industrial panel computer 1 at last, obtain the test value of contact resistance after test data is proofreaied and correct.
4, measurement flow process actuation time as shown in figure 10, come the corresponding test access of gating testing host 6 and enable time test module 4 by control control module 5, thereby controlling program-controlled voltage source 3 output correspondent voltage then produces the time signal of electromagnetic relay contact action for electromagnetic relay line bag, time signal obtains digital signal corresponding after time test module 4 is handled, this digital signal reads the back by control module 5 and gives industrial panel computer 1 by serial ports.
Time test module 4 is tested the time of electromagnetic relay contact action as shown in Figure 2, is made up of FPGA system 8 and time test interface 9.FPGA system 8 comprises MUX 81, time-to-digit converter 82 and read-write controller 83, testing host 6 is connected with MUX 81, time-to-digit converter 82 and the read-write controller 83 of FPGA system 8 by time test interface 9, and time-to-digit converter 82 is connected with read-write controller 83 with MUX 81 respectively.
Control module 5 as shown in Figure 3, it is a slave computer controller of the present utility model, finish and the communicating by letter of industrial panel computer 1, the control of time test module 4 and the systematic function of various test control signals, form by DSP minimum system 10, exterior I/O spatial spread module 11, RS232 communication interface 12 and control module IO interface 13.DSP minimum system 10 is connected with control module IO interface 13 with exterior I/O spatial spread module 11, RS232 communication interface 12 respectively, control module IO interface 13 is connected with exterior I/O spatial spread module 11, testing host 6 is connected with exterior I/O spatial spread module 11 with DSP minimum system 10 by control module IO interface 13, and industrial panel computer 1 is connected with DSP minimum system 10 by RS232 communication interface 12.
DSP minimum system 10 is made of the minimum system of TMS320LF2407A, it comes the translation data of time for reading measurement module 4 by the IOPB mouth, realize communicating by letter of DSP minimum system 10 and industrial panel computer 1 by the SCI controller, utilize address wire A13-A15, IS, WE, STRB to produce the required signal of exterior I/O spatial spread module 11.Exterior I/O space module 11 is realized by CPLD decoding and latch cicuit, CPLD decoding is responsible for signal A13-A15, IS, WE, STRB are deciphered generation signal PORT0000-PORTE000, the signal that decoding produces is controlled latch cicuit and the data D7-D0 on the data bus is latched is outputed on the control module IO interface, that is to say by utilizing visit exterior I/O space to produce needed control signal, CPLD decoding is realized that by EPM7032AETC44-10 latch cicuit adopts SN74HC273 to realize.RS232 communication interface 12 is realized by MAX232ACWE.
As shown in Figure 4, testing host 6 comprises time test signal generation module 14, contact resistance test module 15, input and output isolation module 16, level switch module 17, Test Switchboard array 18, attachment unit interface 19, time test module interface 20, control module interface 21, digital multimeter interface 22 and control voltage interface 23.Test Switchboard array 18 respectively with time test signal generation module 14, contact resistance test module 15, input and output isolation module 16, attachment unit interface 19, control module interface 21 is connected with digital multimeter interface 22, input and output isolation module 16 respectively with time test signal generation module 14, level switch module 17 is connected with Test Switchboard array 18, level switch module 17 respectively with input and output isolation module 16, time test module interface 20 is connected with control voltage interface 23, time test module 4 is connected with control voltage interface 23 with level switch module 17 respectively by time test module interface 20, and control module 5 is connected with level switch module 17 with time test module interface 20 respectively by control voltage interface 23.
Testing host 6 is sent into FPGA system 8 with the startup and the stop signal in all kinds of time intervals to be measured of the actuating of relay by time test interface 9, FPGA system 8 requires various time interval signals to be measured to divide into groups and these packet signals are sent into time-to-digit converter 82 respectively by MUX 81 according to the control signal on the time test interface 9, in time-to-digit converter 82, convert the startup in the time interval and the pulsewidth time signal of stop signal formation to digital signal, digital signal after converting is given control module 5 by read-write controller 83, by control module 5 this digital signal is sent into industrial panel computer 1 by the RS232 interface then.
Time signal generation module 14 is made up of comparator circuit and shaping circuit, comparator circuit adopts electric resistance partial pressure and OPA2241 comparator circuit to realize, the output terminal of electric resistance partial pressure links to each other with the normally closed point or normal battle of electromagnetic relay by Test Switchboard array 18, the not moving contact of electromagnetic relay is by Test Switchboard array 18 ground connection, change thereby make the electric resistance partial pressure output terminal produce level, more just produced the contact actuating signal by this level and another setting level ratio because of the action of electromagnetic relay contact; Shaping circuit is that all contact actuating signals are all become the rising edge signal, it is realized by 74LS244 and 74LS240, the contact actuating signal that promptly is originally rising edge is realized by 74LS244, is originally that the contact actuating signal of negative edge becomes the rising edge signal by 74LS240; Behind comparator circuit and shaping circuit, time signal generation module 14 has just produced the required time signal of test electromagnetic relay contact action.The output signal of time test signal generation module 14 is given input and output isolation module 16 earlier and is sent into level switch module 17 by the corresponding output end of input and output isolation module 16 then, and level switch module 17 is connected with time test module interface 20, control module interface 23 and input and output isolation module 16 respectively.
Contact resistance test module 15 comprises signal generator 25, low-pass filter 26, power amplifier 27, constant current control module 28 and signal processing module 29 as shown in Figure 5.Signal generator 25 is connected with low-pass filter 26, low-pass filter 26 is connected with power amplifier 27 with signal generator 25 respectively, power amplifier 27 is connected with constant current control module 28 with low-pass filter 26 respectively, and Test Switchboard array 18 is connected with signal processing module 29 with constant current control module 28 respectively.
Input and output isolation module 16 main functions are isolated simulating signal and digital signal exactly, and it is realized by PS2801-4 type light lotus root circuit.Level switch module 17 is changed 5V level and 3.3V level exactly mutually, after changing, the control signal that it sends control module interface 21 here gives input and output isolation module 16, give time test module interface 20 after the time signal conversion that it is also sent input and output isolation module 16 here simultaneously, it is realized by the circuit that 74LVC164245 constitutes.Test Switchboard array 18 is made up of relay array and driving circuit, driving circuit is realized by the ULN2803 chip for driving, the selected relay of relay array is G5V-2 and the G5NB-1A of Omron, and the control signal of Test Switchboard array 18 comes from input and output isolation module 16.Time test module interface 20 also receives the control signal that comes from control module 5 and gives time test module 4 except reception comes from the time signal of level switch module 17.Contact resistance test module 15 main each functional circuit of realizing the test of electromagnetic relay contact resistance, it connects the tested contact of electromagnetic relay by the gating of Test Switchboard array 18.
Connector 7 is the interface channels between tested electromagnetic relay and the tester, adopts a DB62 core socket to realize, is connected with the attachment unit interface of testing host.Because the variation of electromagnetic relay packing forms need become the electromagnetic relay standard unified interface so just to help the use of tester.As everyone knows, electromagnetic relay can be divided into closed type, open type, conversion hysteria by the contact action form, normally closedly often open and comprised in the conversion hysteria, be that closed type and open type all are the subclass of conversion hysteria relay, thereby can unify the contact model of all relays, and then can the unified planning test interface with the contact model of conversion hysteria electromagnetic relay.The utility model comes the design test interface with 8 groups of transfer contacts, i.e. 8 quiet chalaza, 8 moving chalaza and 8 fixed points.Tested electromagnetic relay is installed in printed board, and the order cabling that in the printed board each group contact in turn is defined by the contact is connected to the plug of a DB62 core, this plug is inserted connector 7 can test.
The unspecified part of the utility model belongs to general knowledge as well known to those skilled in the art.
Claims (5)
1. electromagnetic relay tester, it is characterized in that: comprise industrial panel computer (1), digital multimeter (2), program-controlled voltage source (3), time test module (4), control module (5), testing host (6) and connector (7), industry panel computer (1) is connected with digital multimeter (2), program-controlled voltage source (3) and control module (5) respectively by the RS232 interface, and testing host (6) is connected with digital multimeter (2), program-controlled voltage source (3), time test module (4), control module (5) and connector (7) respectively.
2. electromagnetic relay tester machine according to claim 1, it is characterized in that: described time test module (4) comprises FPGA system (8) and time test interface (9), FPGA system (8) comprises MUX (81), time-to-digit converter (82) and read-write controller (83), testing host (6) is by the MUX (81) of time test interface (9) with FPGA system (8), time-to-digit converter (82) is connected with read-write controller (83), and time-to-digit converter (82) is connected with read-write controller (83) with MUX (81) respectively.
3. electromagnetic relay tester according to claim 1, it is characterized in that: described control module (5) comprises DSP minimum system (10), exterior I/O spatial spread module (11), RS232 communication interface (12) and control module IO interface (13), DSP minimum system (10) respectively with exterior I/O spatial spread module (11), RS232 communication interface (12) is connected with control module IO interface (13), control module IO interface (13) is connected with exterior I/O spatial spread module (11), testing host (6) is connected with exterior I/O spatial spread module (11) with DSP minimum system (10) by control module IO interface (13), and industrial panel computer (1) is connected with DSP minimum system (10) by RS232 communication interface (12).
4. electromagnetic relay tester according to claim 1, it is characterized in that: described testing host (6) comprises time test signal generation module (14), contact resistance test module (15), input and output isolation module (16), level switch module (17), Test Switchboard array (18), attachment unit interface (19), time test module interface (20), control module interface (21), digital multimeter interface (22) and control voltage interface (23), Test Switchboard array (18) respectively with time test signal generation module (14), contact resistance test module (15), input and output isolation module (16), attachment unit interface (19), control module interface (21) is connected with digital multimeter interface (22), input and output isolation module (16) respectively with time test signal generation module (14), level switch module (17) is connected with Test Switchboard array (18), level switch module (17) respectively with input and output isolation module (16), time test module interface (20) is connected with control voltage interface (23), time test module (4) is connected with control voltage interface (23) with level switch module (17) respectively by time test module interface (20), and control module (5) is connected with level switch module (17) with time test module interface (20) respectively by control voltage interface (23).
5. electromagnetic relay tester according to claim 1, it is characterized in that: described contact resistance test module (15) comprises signal generator (25), low-pass filter (26), power amplifier (27), constant current control module (28) and signal processing module (29), signal generator (25) is connected with low-pass filter (26), low-pass filter (26) is connected with power amplifier (27) with signal generator (25) respectively, power amplifier (27) is connected with constant current control module (28) with low-pass filter (26) respectively, and Test Switchboard array (18) is connected with signal processing module (29) with constant current control module (28) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201271233U CN202041623U (en) | 2011-04-27 | 2011-04-27 | Tester for electromagnetic relays |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201271233U CN202041623U (en) | 2011-04-27 | 2011-04-27 | Tester for electromagnetic relays |
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| Publication Number | Publication Date |
|---|---|
| CN202041623U true CN202041623U (en) | 2011-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011201271233U Expired - Fee Related CN202041623U (en) | 2011-04-27 | 2011-04-27 | Tester for electromagnetic relays |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102707180A (en) * | 2012-06-28 | 2012-10-03 | 南京南车浦镇城轨车辆有限责任公司 | Ground testing device for electrical element of rail vehicle and testing method of electric element |
| CN103033744A (en) * | 2012-12-25 | 2013-04-10 | 山东泰山抽水蓄能电站有限责任公司 | Relay automatic verifying platform |
| CN103226180A (en) * | 2012-01-31 | 2013-07-31 | 哈尔滨建成集团有限公司 | Testing system for electronic delayers |
| CN103278769A (en) * | 2013-06-27 | 2013-09-04 | 北京铁路信号有限公司 | Detection device for relay |
| CN103293471A (en) * | 2013-04-25 | 2013-09-11 | 上海电器科学研究所（集团）有限公司 | Device and method capable of intelligently detecting electric leakage switch in communicating mode |
| CN103487752A (en) * | 2013-09-26 | 2014-01-01 | 贵州天义汽车电器有限公司 | Electromagnetic relay microcomputer debugging instrument |
| CN103809051A (en) * | 2012-11-13 | 2014-05-21 | 上海斐讯数据通信技术有限公司 | Automatic test system and switch matrix and detection method thereof in automatic test system |
| CN104635052A (en) * | 2015-02-11 | 2015-05-20 | 合肥工业大学 | Switching circuit applied to contact resistance testing equipment of electromagnetic relay |
| CN104849596A (en) * | 2015-05-19 | 2015-08-19 | 神华集团有限责任公司 | Current protection actuation time test device and method and relay protection test system |
| CN104865521A (en) * | 2015-06-12 | 2015-08-26 | 中国南方电网有限责任公司超高压输电公司南宁局 | Instrument and method for testing action time of hand-held time relay |
| CN105068000A (en) * | 2015-08-25 | 2015-11-18 | 天津市英贝特航天科技有限公司 | Circuit and method for detection of relay actuation time |
| CN105717447A (en) * | 2016-02-05 | 2016-06-29 | 赵红军 | Relay box comprehensive parameter detector |
| CN106033110A (en) * | 2015-03-16 | 2016-10-19 | 浙江正泰电器股份有限公司 | Relay contact resistance measurement device |
| CN108445387A (en) * | 2018-05-30 | 2018-08-24 | 江苏七维测试技术有限公司 | A kind of electromagnetic relay reliability test box |
| CN108957306A (en) * | 2018-05-16 | 2018-12-07 | 向天 | Based on population parameter measurement type relay intelligent check system |
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2011
- 2011-04-27 CN CN2011201271233U patent/CN202041623U/en not_active Expired - Fee Related
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103226180A (en) * | 2012-01-31 | 2013-07-31 | 哈尔滨建成集团有限公司 | Testing system for electronic delayers |
| CN102707180A (en) * | 2012-06-28 | 2012-10-03 | 南京南车浦镇城轨车辆有限责任公司 | Ground testing device for electrical element of rail vehicle and testing method of electric element |
| CN103809051A (en) * | 2012-11-13 | 2014-05-21 | 上海斐讯数据通信技术有限公司 | Automatic test system and switch matrix and detection method thereof in automatic test system |
| CN103033744A (en) * | 2012-12-25 | 2013-04-10 | 山东泰山抽水蓄能电站有限责任公司 | Relay automatic verifying platform |
| CN103293471A (en) * | 2013-04-25 | 2013-09-11 | 上海电器科学研究所（集团）有限公司 | Device and method capable of intelligently detecting electric leakage switch in communicating mode |
| CN103278769B (en) * | 2013-06-27 | 2016-05-11 | 北京铁路信号有限公司 | A kind of checkout gear of relay |
| CN103278769A (en) * | 2013-06-27 | 2013-09-04 | 北京铁路信号有限公司 | Detection device for relay |
| CN103487752A (en) * | 2013-09-26 | 2014-01-01 | 贵州天义汽车电器有限公司 | Electromagnetic relay microcomputer debugging instrument |
| CN103487752B (en) * | 2013-09-26 | 2016-02-24 | 贵州天义汽车电器有限公司 | A kind of electromagnetic relay microcomputer debugging instrument |
| CN104635052A (en) * | 2015-02-11 | 2015-05-20 | 合肥工业大学 | Switching circuit applied to contact resistance testing equipment of electromagnetic relay |
| CN106033110A (en) * | 2015-03-16 | 2016-10-19 | 浙江正泰电器股份有限公司 | Relay contact resistance measurement device |
| CN104849596A (en) * | 2015-05-19 | 2015-08-19 | 神华集团有限责任公司 | Current protection actuation time test device and method and relay protection test system |
| CN104865521A (en) * | 2015-06-12 | 2015-08-26 | 中国南方电网有限责任公司超高压输电公司南宁局 | Instrument and method for testing action time of hand-held time relay |
| CN104865521B (en) * | 2015-06-12 | 2018-03-09 | 中国南方电网有限责任公司超高压输电公司南宁局 | A kind of hand-held time relay actuation time tester and method |
| CN105068000A (en) * | 2015-08-25 | 2015-11-18 | 天津市英贝特航天科技有限公司 | Circuit and method for detection of relay actuation time |
| CN105717447A (en) * | 2016-02-05 | 2016-06-29 | 赵红军 | Relay box comprehensive parameter detector |
| CN108957306A (en) * | 2018-05-16 | 2018-12-07 | 向天 | Based on population parameter measurement type relay intelligent check system |
| CN108445387A (en) * | 2018-05-30 | 2018-08-24 | 江苏七维测试技术有限公司 | A kind of electromagnetic relay reliability test box |
| CN108445387B (en) * | 2018-05-30 | 2023-09-19 | 江苏七维测试技术有限公司 | Electromagnetic relay reliability test box |
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