KR101940190B1 - Multipurpose insulation resistance measurement apparatus for resistance test of electric equipment and cable - Google Patents

Abstract

The present invention is implemented in an actual equipment such as aviation field, and can be automatically performed according to a schedule in which a circuit resistance test, a ground insulation test, and a line insulation test are pre-input to a device under test including an electronic mounting device and an electric cable, The electronic circuit board is provided with a simulated circuit board modeling the measured stage in an electrical circuit so that the operation test can be performed to verify the normal operation and to use the mounted circuit board. And more particularly to a versatile insulation resistance measuring device capable of performing a cable resistance test.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a multi-purpose insulation resistance measuring device,

The present invention is implemented in an actual equipment such as aviation field, and can be automatically performed according to a schedule in which a circuit resistance test, a ground insulation test, and a line insulation test are pre-input to a device under test including an electronic mounting device and an electric cable, The electronic circuit board is provided with a simulated circuit board modeling the measured stage in an electrical circuit so that the operation test can be performed to verify the normal operation and to use the mounted circuit board. And more particularly to a versatile insulation resistance measuring device capable of performing a cable resistance test.

Insulation resistance measurement is performed in various fields, and in general, the worker directly measures the workpiece manually, but it consumes a large amount of labor and time, and there is a possibility that human injury may occur during manual measurement.

Accordingly, a device for measuring the insulation resistance more easily and quickly has been developed. The developed devices use a method of analyzing the components of the test power source according to the supply of the test power, a method of analyzing the test power input in the uninterruptible state, and a method of simultaneously analyzing the input of the test subject.

However, it is very difficult to measure the insulation resistance individually for each electric cable, which is complicatedly wired in the interior, like the actual equipment in the aviation field by using such a device. Since the sensing means is installed on a cable-by-cable basis, It becomes.

In addition, the insulation resistance measurement can be classified into a ground insulation test and a line-to-line insulation test. In the past, only one type of test has been possible, and furthermore, there is a limit that can not be used for resistance measurement for circuit resistance testing.

On the other hand, the electronic mounting equipment used in the avionics field is installed in the manufacturing process and the terminal block for the circuit test is installed and tested after being tested through the terminal block. In such an electronic mounting apparatus, for example, a large number of electrical and electronic elements are mounted on a circuit board to constitute a complicated circuit, and the number of terminals provided in the terminal block for circuit testing is large, and the items to be tested are very large in proportion to the number of terminals do.

When these electronic mounting equipments are installed in actual equipment, it is necessary to periodically inspect them to prevent them from failing. However, it is very difficult to perform circuit test or insulation test as much as in manufacturing.

Also, in the case of a large number of test objects, it is very difficult to verify whether or not the measuring device is capable of properly performing the test object.

KR 10-1677553 B1 2016.11.14. KR 10-1113199 B1 Jan. 31, 2012. KR 10-0740826 B1 2007.07.12.

Therefore, the present invention can conduct a grounding insulation test, a line-to-line insulation test and a circuit resistance test with a single device for many electronic mounting equipments with many terminals to be tested and a large number of complex cables, And to provide a versatile insulation resistance measuring device capable of testing cable resistance and electronic mounting equipment which can be conveniently mounted on actual equipment.

According to an aspect of the present invention, there is provided an apparatus for measuring an insulation resistance, comprising: a testing device for supplying measurement electricity and measuring an insulation resistance; A matrix switch (60) for selecting an output terminal among a plurality of output terminals according to a select signal and outputting a switching signal; For electrically connecting each of the terminals provided in the circuit test terminal block of the electronic mounting apparatus mounted on the actual equipment or each of the plurality of measured terminals including the ground terminal of the actual equipment, By connecting two external connection terminals corresponding to the switching signal by the matrix switch 60 to a plurality of external connection terminals 72 and connecting them to the test apparatus 50, A terminal block (70) for applying measurement electric power to a measurement target connected to two external connection terminals and measuring an insulation resistance; And transmits the selected signal to the matrix switch 60 in accordance with the test target test schedule pre-inputted through the user interface 20 so that the measured stage corresponding to the switching signal by the select signal is tested by the terminal block 70 A controller (40) connected to the apparatus (50) and recording and managing the insulation resistance measured by the testing apparatus (50) so as to match the schedule; .

According to the embodiment of the present invention, there is provided a simulation circuit board 80 in which a plurality of measurement targets to be connected to the external connection terminals 72 of the terminal block 70 are modeled by electrical circuitry, It is possible to test the insulation resistance measurement operation according to the schedule after connecting the simulation circuit board 80 to the external connection terminal 72 of the terminal block 70.

According to the embodiment of the present invention, the schedule includes a grounding insulation test for measuring an insulation resistance by including a grounding end on a measured end to be selected, a line insulation test for measuring insulation resistance by selecting two measurement ends excluding the grounding end And a circuit resistance test for measuring circuit resistance by selecting two to-be-measured ends excluding the grounding end, wherein the controller (40) controls the testing device (50) And the voltage is measured to obtain the circuit resistance. In the ground insulation test and the line insulation test, the voltage is applied to the electricity for measurement, and the current is measured to obtain the insulation resistance.

According to the embodiment of the present invention, the controller 40 can generate and test a select signal corresponding to a corresponding measured terminal as soon as two measured terminals are selected through the user interface 20.

According to the embodiment of the present invention, the user interface 20, the controller 40, the test apparatus 50, the matrix switch 60, the terminal block 70 and the simulation circuit board 80 are connected to a power source Is installed in the dustproof and moisture-proof rack (10) together with the distributor (40) and the jumper wires (82) for connection between the terminal block (70) and the simulating circuit board (80) .

According to the present invention configured as described above, it is possible to automatically measure the insulation resistance by sequentially selecting a plurality of measured ends according to a schedule, and it is convenient to use, and it is possible to measure in a short time even if there are many measurement stages, Depending on the selection method of the stage, it can be used for various purposes such as ground insulation test, line insulation test and circuit resistance test.

According to the embodiment, by performing the virtual measurement process using the simulation circuit board modeled by the electric circuit, the measurement process can be verified even if the measurement schedule is complicated. Thus, the reliability of the measurement process can be assured can do.

According to the embodiment, it is possible to mount the device in an excellent rack for protecting the components from vibration, moisture, dust, etc., and to mount the device on the actual equipment.

1 is a conceptual diagram illustrating the use of an insulation resistance measuring apparatus according to an embodiment of the present invention.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an insulation resistance measuring apparatus, and more particularly,
3 is an electric circuit configuration diagram of an insulation resistance measuring apparatus according to an embodiment of the present invention.
Fig. 4 is an electric circuit configuration diagram of the test apparatus 50. Fig.
5 is an example of a user interface screen.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1, the insulation resistance measuring apparatus according to the embodiment of the present invention is configured to be mounted on a rack 10 of a pelican case type and installed in an actual equipment 1, The cable is connected to the electronic mounting device 2 of the actual equipment 1, the cable for electric field and the ground and the user interface 20 is used to perform a schedule management And can be used.

Here, the electronic mounting apparatus 2 is an electronic apparatus mounted on the apparatus 1, and is provided with a terminal block 2a for circuit testing, so that the terminal block 2a for circuit testing can be connected to the cable. The terminal block for circuit test 2a is used for testing the electronic mounting equipment 2 at the time of manufacturing (or before shipment), and is a known component as mentioned in the Background of the Invention, and thus a detailed description thereof will be omitted.

However, in the embodiment of the present invention, as in the case of testing at the time of fabrication, a cable connected to each terminal provided in the terminal block 2a for circuit testing of the electronic mounting apparatus 2 is pulled out, To make it possible to test it as a test at the time of production.

That is, the insulation resistance measuring apparatus according to the embodiment of the present invention includes terminals provided in the circuit testing terminal block 2a of the electronic mounting apparatus 2 mounted on the actual equipment 1, And the ground terminal on the ground side used in the actual equipment (1) are to be measured. Strictly speaking, the grounding end is intended to perform a grounding insulation test for the measurement target other than the grounding end, but is selectively used by switching as described later, and is used for the test.

2, the insulation resistance measuring apparatus according to the embodiment of the present invention includes a user interface 20, a power distributor 30, a controller 40, The test apparatus 50, the matrix switch 60, the terminal block 70 and the simulating circuit board 80 are constituted as electric circuit components and these electric circuit components are mounted in the rack 10 to complete the manufacture , So it is convenient to move to the actual equipment (1) to install and use.

At this time, the pelican case type rack of Pelican Co., Ltd., which is less damaged by vibration, excellent in dustproofing and moisture-proofing, and capable of safely protecting the mounted electric circuit components, was applied to the rack 10 at this time.

2, a user interface 20 that can be used by being drawn out to the front, a PXI Chasis capable of mounting PXI equipment, a power distributor 30 covered with a front panel for covering, The terminal block 70 and the simulation circuit board 80 for the measurement target are mounted one by one in the inner space of the rack 10 from the upper space. A drawer 11 is provided in the lowermost space of the internal space of the rack 10 so as to be able to store an output product in which a measurement result is recorded, for example. The rack 10 is provided with a rotation- And is convenient to move and install.

Here, the controller 40, the test apparatus 50, and the matrix switch 60 are mounted on the PXI Chasis.

The controller 40 for controlling the operation of the insulation resistance measuring apparatus constructed as described above generates a switching signal to the matrix switch 60 in accordance with the user input inputted through the user interface 20, When the two blocks to be measured are connected to the test apparatus 50 in the closed circuit in accordance with the switching operation of the terminal block 70 and the block 70 is switched on, And the resistance value is obtained as a result of measurement.

Hereinafter, a description will be made of the electrical circuit components such as the user interface 20, the power distributor 30, the controller 40, the test apparatus 50, the matrix switch 60, the terminal block 70 and the simulation circuit board 80 Will be described in detail.

The user interface 20 may include a monitor, a keyboard and a mouse as components for viewing an output screen, setting an environment, inputting a measurement schedule, or designating a measurement target, as described later. So that the drawer can be drawn out from the rack 10 using a drawer. Preferably, the printer includes a printer that outputs the measurement result on the fly to a print.

The power distributor 30 receives electricity from the outside, and distributes the supplied electricity to the user interface 20 and the PXI Chasis. Here, the electricity distributed to the PXI Chasis is supplied to the controller 40, the test apparatus 50, and the matrix switch 60. Of course, if the terminal block 70 is configured to require electricity, it also distributes electricity there.

The test apparatus 50 applies the measurement electricity to the terminal block 70 and measures the insulation resistance or the circuit resistance for the two terminals to be measured which are closed by the terminal block 70, A driving power supply 51 for generating electricity for electric furnace measurement supplied from the power distributor 30, a current measuring unit 52 for detecting currents flowing through the two measured ends, And a voltage measuring unit 53 for detecting a voltage between the stages.

The test by the test apparatus 50 is a circuit resistance test in which a current is applied through two measurement terminals and a voltage between two measurement terminals is measured and a resistance value (circuit resistance) is obtained according to the measurement result, A grounding insulation test in which a voltage is applied between the grounded end and the measured end to obtain a resistance value (insulation resistance) according to measurement results after measurement of the current, and a grounding insulation test And a line-to-line insulation test in which a resistance value (line-to-line insulation resistance) is obtained according to the measurement result after measuring the current.

Therefore, the driving power supply unit 51 operates as a current source for applying a current when performing a circuit resistance test, and operates as a voltage source for applying a voltage when conducting a ground insulation test and a line-to-line insulation test, Further, it is constituted to be able to vary the applied current at the time of operation as a current source and the applied voltage at the time of operation as a voltage source according to the type of the measurement stage or the test type.

As described above, the controller 40 controls whether the driving power supply 51 is operated as a current source or a voltage source, and how much the applied current or applied voltage is to be applied. When operating as a current source, the voltage measuring unit 53 measures the voltage, and when the voltage source is operated, the current measuring unit 52 measures the current.

The matrix switch 60 has a plurality of signal output terminals 61 connected to a terminal block 70 through a cable 62 and has an output terminal 61 corresponding to a select signal sent from the controller 40 And outputs the switching signal through the selected output terminal 61. [0064]

Here, the output terminal 61 is prepared as many as the number of terminals to be connected to the test apparatus 50 individually in the terminal block 70 in accordance with the switching signal output for each output terminal 61.

The matrix switch 60 may be selected from commercially available ones according to the number of the plurality of measurement stages and different switching signals for the plurality of measurement stages.

The terminal block 70 is connected to each terminal provided in the circuit test terminal block 2a of the electronic mounting apparatus 2 or to a plurality of measured A signal input terminal 73 for receiving the switching signal from the matrix switch 60, a plurality of external connection terminals 72 for electrically connecting the terminals to the measured terminal connected by the switch bank 71, Two test terminals 74 provided to the test apparatus 50 and two external connection terminals 72 corresponding to the received switching signals are connected to a plurality of external connection terminals 72 And a switch bank 71 for connecting the measured end connected to the two external connection terminals to the test apparatus 50 in a closed circuit by electrically connecting the selected terminals to the test terminal 74.

Thus, the test apparatus 50 applies the measurement electricity to the two measurement terminals connected to the closed circuit, measures the current or voltage, and obtains the resistance value according to the measurement result.

Here, the switch bank 71 may be constituted by, for example, switches for selectively connecting each measured stage to two lines (two test terminals for a closed circuit connection) of the test apparatus 50, The switch can be operated according to the switching signal. As another example, the switch bank 71 may be provided with two rotary switches that can be selected at least by the number of the measurement stages and connected to the two lines of the test apparatus 50, respectively.

Such a switch bank 72 can be selectively used as a matrix switch 60 in accordance with the number of units to be measured on the market.

The simulation circuit board 80 is a circuit board modeled by electrical circuits of a plurality of measurement terminals to be connected to the external connection terminal 72 of the terminal block 70. The simulation circuit board 80 has an external connection terminal 72 as an input terminal, Is obtained from the equivalent circuit of the measurement target stage.

For example, the manufacturer of the electronic mounting device 2 can provide the impedance value of the internal circuit shown through the terminal block 2a for circuit testing, so that it can be applied. In the case of the cable for electric field, , The insulation resistance for the ground insulation test may be applied to a sufficiently large value without causing a ground fault, and the measured stage may be modeled by various impedance elements (for example, resistors, capacitors, and coils).

Meanwhile, according to the embodiment of the present invention, since the circuit resistance, the ground insulation, and the line-to-line insulation test are performed, the simulation circuit board 80 can be formed using only the resistor elements.

The simulated circuit board 80 thus configured has a jumper terminal 81 to be connected to the external connection terminal 72 of the terminal block 70 by using the jumper wire 82.

The jumper wire 82 connected to the simulation circuit board 80 may be connected to the external connection terminal 72 of the terminal block 70 instead of the measured terminal to test the present invention according to a schedule.

The controller 40 includes a list creating operation for receiving a list of measurement targets through the user interface 20, a configuration setting operation for receiving a setting value for the testing device 50, a schedule creating operation for receiving a schedule, A test operation using the circuit board 80, an automatic measurement operation for generating a select signal according to a schedule and controlling the operation of the matrix switch 60 to obtain a measurement result, A program for a manual measurement operation for obtaining a measurement result by controlling the operation of the matrix switch 60 by generating a select signal corresponding to the measured terminal immediately upon selection is provided.

5, a main screen 90 for outputting to the user interface 20 is provided with a button or a window for performing the above-described operation, and the result obtained by the test is transmitted to the test sheet 90- 5).

In the list creation operation, two measurement targets are selected and input to a data sheet (not shown) as a test item. That is, each test item recorded in a data sheet stored in a memory (not shown) specifies the measured stage of the test object. The main screen 90 is provided with a window 90-4 showing the registration of the test items and the registered test items.

When the term arrangement button 90-3 for the environment setting operation is clicked, the voltage at the time of operating as a voltage source, the current at the time of operating as a current source, The time interval for applying electricity, and the like. In this case, it may be set for each test item. Of course, the configuration is done by test type.

When the test setting button 90-2 for the schedule creation operation is clicked, one of the test types classified as the grounding insulation test, the line insulation test, and the circuit resistance test is selected according to the configuration of the screen 92, To select the test items. At this time, the selected test items and test types are the measurement schedules.

The automatic measurement operation is tested for each test item according to the test item order and test type of the schedule.

The test for each test item generates a select signal for selecting the to-be-measured stage of the test item and transmits it to the matrix switch 60 so that the terminal to be measured is connected to the test apparatus 50 by the terminal block 70 And the test apparatus 50 is operated in accordance with the test type and the environment setting. Here, when the test type is the circuit resistance test, the current of the current source is applied to the measuring electric power, and the voltage is measured to obtain the circuit resistance. If the test type is a grounded insulation test or a line-to-line insulation test, apply the voltage of the voltage source to the measuring electricity and measure the current to obtain the insulation resistance.

The resistance value (circuit resistance or insulation resistance value) obtained in accordance with the automatic measuring operation is recorded and managed so as to match the test items of the schedule.

When the manual measurement button 90-1 for the manual measurement operation is clicked, either one of the test items is selected from the list of test items according to the configuration of the screen 91, . Of course, you can test after you have selected a test type.

On the other hand, the test type may be predetermined according to the type of the measurement target and recorded in the list of test items, so that the test items recorded in correspondence with the selected test types at the time of schedule creation may be selected to create a schedule. Also, the test type may be automatically selected in accordance with the measured stage in the manual measurement operation.

The test operation is performed in a state in which the simulation circuit board 80 is connected to the terminal block 70 instead of the measurement target, and is performed in the same manner as the automatic measurement operation described above.

1: Actual equipment 2: Electronic mounting equipment 2a: Terminal block for circuit test
10: Rack
20: User interface
30: Power distributor
40: controller
50: Test apparatus 51: Drive power supply
52: current measuring unit 53: voltage measuring unit
60: Matrix switch 61: Signal output terminal 62: Cable
70: Terminal block 71: Switch bank 72: External connection terminal
73: Signal input terminal 74: Test terminal
80: simulating circuit board 81: jumping terminal 82: jumper line

Claims (5)

A testing device (50) for supplying electricity for measurement and measuring the insulation resistance;
A matrix switch (60) for selecting an output terminal among a plurality of output terminals according to a select signal and outputting a switching signal;
For electrically connecting each of the terminals provided in the circuit test terminal block of the electronic mounting apparatus mounted on the actual equipment or each of the plurality of measured terminals including the ground terminal of the actual equipment, By connecting two external connection terminals corresponding to the switching signal by the matrix switch 60 to a plurality of external connection terminals 72 and connecting them to the test apparatus 50, A terminal block (70) for applying measurement electric power to a measurement target connected to two external connection terminals and measuring an insulation resistance;
A plurality of measurement targets to be connected to the external connection terminal 72 of the terminal block 70 are modeled by an electric circuit and a simulation circuit modeled by an impedance element according to an equivalent circuit of the measurement stage so as to have an input impedance of the measurement target Board 80;
A user interface (20) for registering a plurality of test items each specifying a subject to be tested and selecting a plurality of test items among the registered test items and receiving a schedule composed of a plurality of selected test items;
A select signal is transmitted to the matrix switch 60 according to a pre-inputted schedule via the user interface 20 so that the corresponding measured terminal is connected to the testing apparatus 50 by the terminal block 70, A controller (40) for recording and managing the insulation resistance measured by the controller (50) so as to match the schedule; And
A power distributor 30 for receiving electricity from the outside and distributing the electricity to the user interface 20, the controller 40, the test apparatus 50, the matrix switch 60 and the terminal block 70;
Is mounted in the dustproof and moisture-proof rack (10) together with the jumper wire (82) for connection between the terminal block (70) and the simulation circuit board (80) It is possible to test the insulation resistance measurement operation according to the schedule after connecting the simulation circuit board 80 to the external connection terminal 72 of the terminal block 70
Insulation resistance measuring device. delete The method according to claim 1,
The schedule includes a grounding insulation test for measuring insulation resistance by including a grounding end on a measured end to be selected, a line insulation test for measuring insulation resistance by selecting two measurement ends excluding the grounding end, And the circuit resistance is measured by selecting the measurement target and dividing it into a circuit resistance test,
The controller (40) controls the test apparatus (50), and the circuit resistance test applies an electric current to the electric current for measurement, measures the voltage to obtain the circuit resistance, and the ground insulation test and the line- And the current is measured to obtain the insulation resistance
Insulation resistance measuring device. The method of claim 3,
The controller 40 generates and outputs a select signal corresponding to the measured terminal immediately after the two measured terminals are selected through the user interface 20
Insulation resistance measuring device. delete

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