JPS6016697B2 - Relay testing equipment - Google Patents

Description

Detailed Description of the Invention The present invention provides various characteristics such as minimum operating voltage, maximum open circuit voltage, winding resistance, contact contact resistance, insulation resistance, insulation leakage current, and operating time of all electrical appliances used in vehicles, etc. This invention relates to a relay testing device that performs a test and displays or records the measurement results of the relay under test.

A method for measuring the minimum operating voltage, which is one of the characteristics of a relay, will be explained with reference to FIG.

The output voltage of constant voltage current 1 using a commercial power source such as AC 100V is divided by variable resistor 2, and the relay under test RYt is
Gradually increase the voltage applied to the excitation coil Ct from 0, visually detect the opening of the contact Kt of the relay under test RYt, and visually read the voltage applied to the excitation coil Ct at that time using the voltmeter 3. Measure.

In addition, other measurement tests were conducted using a similar method, resulting in complicated connection of measurement lines, errors in measurement values due to non-uniformity of measurement methods, and increased time required to measure a large number of relays. Many problems remained.

The present invention was made against the background of the above-mentioned circumstances, and
We provide relay testing equipment that automates measurement, simplifies measurement work, increases the number of measurements, automatically switches a large number of relays under test, shortens measurement time, and automates statistical processing of measured values. The purpose is to

That is, the present invention is characterized by having a storage section in which test processing programs and reference data for various test items corresponding to scheduled relays are stored in advance, and in which various data related to processing can be stored. an arithmetic processing unit that performs input/output and arithmetic processing according to a program; an input unit for inputting information to the arithmetic processing unit;
an output section for outputting information from the arithmetic processing section; an operation section for inputting a control command to the input section; a variable power source whose output is controlled by an output signal from the output section; and the variable power source. an output detection circuit that detects an output value and supplies it to the input section; an output circuit that connects the relay under test and supplies the output of the variable power supply to the excitation coil of the relay under test; and a contact section of the relay under test. and a display/recording section for at least one of displaying and recording measurement results based on the output from the output section.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. In FIG. 2, the operation section 11 has switches for setting the type, model, etc. of the relay under test, and switches for setting control commands for the calculation section 12.

The input section 13 includes a buffer circuit for interfacing the arithmetic section 12 with the outside. The calculation unit 12 performs input/output processing or four arithmetic operations for relay test processing in the order of instructions specified by the storage unit 14. Output section 1
Reference numeral 5 includes an arithmetic unit 12 and an external output buffer circuit. The display section 16 displays the data or results instructed by the calculation section 12, and the recording section 17 similarly prints and records the results. K,,K2 is the relay under test RY,
, RY2, and 18 is an A/D converter consisting of an A/D (analog-to-digital) converter or a digital voltmeter that converts the input voltage into digital data.

The storage unit 14 permanently stores a group of instructions, that is, a program, to be executed by the arithmetic unit 12, reference data such as various characteristic data of the relay to be tested, and stores various data associated with processing of the group of instructions. Reference numeral 19 denotes a DC or AC variable power source that outputs a voltage value instructed by the calculation unit 12.

C, , C2 are excitation coils of the relays under test RY, RY2. Furthermore, 20 and 21 are relays under test RY,,
They are an input circuit and an output circuit, respectively, for connecting RY2 and switching them. Next, the operation in the above configuration will be explained.

When the operating section 11 is used to set the type of relay under test and to issue a command to start a test, the instructions stored in the storage section 14 are executed by the arithmetic section 12.

The arithmetic unit 12, storage unit 14, etc. are configured using, for example, a known computer, and predetermined test processing is performed in accordance with this instruction. For example, in the case of minimum operating voltage measurement, a control signal is given to the variable power supply 19 to gradually increase the output voltage from OV. At this time, if the relay under test set by the operation unit 11 is RY, the output voltage of the variable power supply 19 is applied to the relay RY by the output circuit 21. In this state, when the output voltage of the variable power source 19 is increased and the rear point K of the relay RY is closed, a contact operation signal is input to the input section 13 via the input circuit 20, and the variable power source 19 at this time The output voltage (that is, the minimum operating voltage) of is converted into digital data by the A/D converter 18, and this data is passed through the input unit 13, and
The signal is input to the calculation unit 12. Then, the calculation unit 12 retrieves from the storage unit 14 the prescribed value of the minimum operating voltage according to the type or model of the relay under test set by the operation unit 11, and extracts it from the storage unit 14 and inputs it from the A/D conversion unit 18. It is compared with the data, and if it is within the specified value (tolerable value), it is determined to be good, otherwise it is determined to be defective, and the pass/fail determination result and the measurement result (minimum operating voltage value) are output to the display section 15 and the recording section 16. do.
In addition, the same applies to other tests as well.
For example, in the case of a maximum open circuit voltage measurement test, the procedure is almost the same as above, but the difference is that the contact of the relay under test is a B contact, and the voltage applied to the excitation coil of the relay is gradually lowered from the rated value. .

In addition, in the case of a contact resistance measurement test, the contact resistance is measured by applying no voltage to the excitation coil when measuring the B contact, and setting it to the rated pressure when measuring the A contact. Furthermore, in the case of a dielectric strength test, the DC component of insulation leakage current (the applied voltage is AC) is measured. By doing so, the following effects can be obtained for each measurement.

{a} As mentioned above, in the minimum operating voltage measurement test, the voltage applied to the excitation coil is gradually increased, and a
The voltage applied when the contact closes is measured.

In the conventional method, the closed state of the a contact was visually confirmed, which differed from the actual circuit operation. In other words, it should not be determined that the a contact is closed unless it reaches a state where the contact resistance value is below a certain level under a certain contact pressure. According to the embodiment described above, reliable measurement of the operating voltage can be performed by confirming the conductive state of the contacts by measuring the contact resistance value. (In the b' maximum open circuit voltage measurement test, it is almost the same as in the case of {a}. [c}
Conventionally, in contact resistance measurement tests, measurements were taken several times and the average value was taken as the measured value, but this was not necessarily the correct measured value.

In other words, since the measured value of contact resistance changes each time it is measured, it is ideally necessary to measure it several dozen times. According to the embodiment described above, since it is equipped with a high-speed measurement processing function, it is possible to perform several dozen measurements and perform desired statistical processing, such as taking the average value of only data within the normal distribution or representative examples. Therefore, the measurement value can be ensured. [d- In the dielectric strength test, according to the conventional method, a predetermined voltage is applied to visually observe the occurrence of arcing in each part.

According to the above embodiment, by measuring the direct current component of the insulation leakage current (the applied voltage is alternating current), the insulation state can be quantified and the insulation state can be accurately grasped. Therefore, even for things such as contact resistance values, which vary from measurement to measurement and it is difficult to determine which measurement value is correct, the calculation ability of the calculation unit can be utilized to increase the number of measurements. This makes it possible to perform arbitrary statistical data analysis, such as by taking the average value of the measured values, and improves the reliability of the measured values. Furthermore, since all tests can be automated, the measurement time for the relay under test can be shortened.
Note that the present invention is not limited to the embodiments described above and shown in the drawings, but can be implemented with various modifications without changing the gist thereof.

For example, the calculation unit 13 can be configured using a microcomputer, a sequence controller, or the like, and the storage unit 14 can also be configured by a similar device. The variable power source 19 can be configured using, for example, an electric slide regulator or an electronic variable power source. It is also possible to carry out these characteristic tests by placing only the relay to be tested on a vibrating device and performing similar tests under vibrating conditions. An example of this case is shown in FIG.

The relay tester 31 is the relay under test RY in FIG.
, , consists of the entire measurement circuit excluding RY2.

The vibration tester 32 is a control device for vibrating a vibration test stand 33, and the relay test stand 34 houses a relay to be tested (including a test circuit as the case may be). The relay test stand 34 is mounted on the vibration test stand 33, and the vibration test stand 33 is vibrated under the control of the vibration tester 32 based on commands from the calculation unit 12 of the relay tester 31. It is possible to test the relay under test in an excitation state and a non-excitation state depending on the vibration frequency, amplitude, and excitation force. In this case, by subjecting the relay under test to an excitation state equivalent to that of being mounted on a vehicle, it becomes possible to reproduce failure phenomena that could not be detected by the relay. Further, the number of relays to be tested may be one or many, and if only one relay is always tested, the switching selection function of the input circuit 20 and output circuit 21 is not required. As detailed above, according to the present invention, measurement is automated, measurement work is simplified, the number of measurements is increased, a large number of relays under test are automatically switched, measurement time is shortened, and measurement value statistics are achieved. It is possible to provide a relay testing device that enables automated processing.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional measuring circuit, FIG. 2 is a block diagram showing the structure of one embodiment of the present invention, and FIG. 3 is a block diagram showing the structure of another embodiment of the present invention. DESCRIPTION OF SYMBOLS 11... Operation part, 12... Arithmetic part, 13... Input part, 14... Storage part, 15... Output part, 16...
Display section, 17... Recording section, 18... A/D conversion section,
19... Variable power supply, 20... Input circuit, 21...
Output circuit, 31... Relay tester, 32... Vibration tester, 33... Vibration test stand, 34... Relay test stand. Figure 1 Figure 2 Figure 3

Claims (1)

[Scope of Claims] 1. A test processing program and reference data for various test items corresponding to a scheduled relay are stored in advance, and a storage unit capable of storing various data related to the processing is provided, and the test processing program is performed according to the test processing program. an arithmetic processing section that performs input/output and arithmetic processing; an input section for inputting information to the arithmetic processing section; an output section for outputting information from the arithmetic processing section; and a control command input to the input section. A variable power source whose output is controlled by an output signal from the output section, an output detection circuit that detects the output value of the variable power source and supplies it to the input section, and a relay under test connected to the an output circuit for supplying the output of the variable power source to the excitation coil of the relay under test; an input circuit for connecting the contact section of the relay under test and providing information on the contact section to the input section; and the output section. A relay testing device comprising: a display/recording unit that displays and/or records measurement results based on output from the relay. 2. The output circuit and the input circuit each have a structure in which a large number of relays to be measured and their contact parts are connected, and the relays connected to the output circuit and the input circuit are switched and selected according to the output of the output part. A relay testing device according to claim 1, characterized in that: 3. The relay testing device according to claim 1 or 2, wherein the output circuit and the input circuit are connected to the relay under test using a plug-in method using a socket. 4. A test processing program and reference data for various test items corresponding to the planned relay are stored in advance, and has a storage section capable of storing various data related to processing, and is capable of performing input/output and arithmetic processing according to the test processing program. an arithmetic processing unit to perform the arithmetic processing; an input unit for inputting information to the arithmetic processing unit; an output unit for outputting information from the arithmetic processing unit; an operation unit for inputting control commands to the input unit; a variable power source whose output is controlled by an output signal from the input section; an output detection circuit that detects the output value of this variable power source and supplies it to the input section; an output circuit for connecting the contact section of the relay under test and supplying information on the contact section to the input section; and at least one for displaying and recording measurement results based on the output from the output section. A test device main body comprising a display/recording section for performing one of the above operations, a vibration test stand on which the relay under test is installed, and a drive control of the vibration test stand by the test device main body based on instructions from the arithmetic processing section. A relay testing device comprising a vibration tester.