CN111308205A - General insulation resistance detection device - Google Patents
General insulation resistance detection device Download PDFInfo
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- CN111308205A CN111308205A CN201911222090.8A CN201911222090A CN111308205A CN 111308205 A CN111308205 A CN 111308205A CN 201911222090 A CN201911222090 A CN 201911222090A CN 111308205 A CN111308205 A CN 111308205A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
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Abstract
A universal insulation resistance detection device comprises a relay group consisting of z relays, wherein the anode of an insulation resistance detection meter is connected with one end of a normally closed contact of each relay in series, the cathode of the insulation resistance detection meter is connected with one end of a normally open contact of each relay in series, a detection port is connected between the other end of the normally open contact of each relay and the other end of the normally closed contact of each relay in series, the number of the detection ports is z, the z detection ports are arranged into a matrix with m rows and n columns, and z = m x n; the PLC is used for controlling the relay coils of the relays to be electrified so that the detection ports in at least two random rows/columns in the matrix are connected in parallel to the positive electrode of the insulation resistance detection meter, and the detection ports in the rest rows/columns in the matrix are connected in parallel to the negative electrode of the insulation resistance detection meter, so that detection between every two detection ports is realized; the PLC controller is connected with the voltage-stabilized power supply. The invention has obvious effects on improving the reliability of insulation resistance detection, improving the working efficiency and reducing the frequency of missed detection.
Description
Technical Field
The invention belongs to the technical field of electronic measurement, and particularly relates to a universal insulation resistance detection device.
Background
The insulation resistance detection mainly refers to the detection of insulation resistance between the non-communicated conductive parts of the electric parts such as cables and control boxes, and whether faults such as short circuit, disconnection, breakage and the like exist in the electric parts can be judged through the insulation resistance detection. Whether the insulation between the cables is good or not is an important index of the electrical performance of the cables and the control box. For a weapon equipment system, the insulation performance of the weapon equipment system directly influences the power-on safety and reliability.
When traditional insulation resistance detects, be connected to two not communicating electrically conductive positions of piece under test respectively with two sense terminals of megohmmeter, can only detect the insulation resistance of two independent electrically conductive positions at every turn, take the dielectric strength detection of a 40 core cable as an example, adopt traditional detection mode then to carry out totally 40+39+38+37+ … … +2+1=820 detections, and need to change the sense terminal of megohmmeter many times, waste time and energy, and the phenomenon of lou examining appears easily in the testing process, there is the quality hidden danger.
Disclosure of Invention
The invention aims to solve the technical defects, and provides a universal insulation resistance detection device which has obvious effects on improving the reliability of insulation resistance detection, improving the working efficiency, reducing the frequency of quality problems and eliminating missed detection.
The technical scheme of the invention is as follows: the system comprises a relay group consisting of z relays, wherein the anode of an insulation resistance detection meter is connected with one end of a normally closed contact of each relay in series, the cathode of the insulation resistance detection meter is connected with one end of a normally open contact of each relay in series, a detection port is connected between the other end of the normally open contact of each relay and the other end of the normally closed contact of each relay in series, the number of the detection ports is z, the z detection ports are arranged into a matrix with m rows and n columns, and z = m multiplied by n; the PLC is used for controlling the relay coils of the relays to be electrified so that the detection ports in at least two random rows/columns in the matrix are connected in parallel to the positive electrode of the insulation resistance detection meter, and the detection ports in the rest rows/columns in the matrix are connected in parallel to the negative electrode of the insulation resistance detection meter, so that detection between every two detection ports is realized; the PLC controller is connected with the voltage-stabilized power supply. And when the relay coil is electrified, the corresponding normally open contact is closed, the normally closed contact is opened, and the corresponding detection port is connected with the negative electrode of the insulation resistance detection meter. The relay coil is not electrified, the corresponding normally open contact is still in an open state, the normally closed contact is still in a closed state, and the corresponding detection port is connected with the anode of the insulation resistance detection meter. The programmable controller is Siemens S7-300PLC, which is a universal automatic control technology widely applied in the market.
Each detection port is connected with a patch cord used for being connected with each detection terminal of the component to be detected.
The input end of the regulated power supply is connected with the mains supply AC220V, and the output end of the regulated power supply is DC24V voltage.
A button switch and a high-voltage fuse are connected in series between the commercial power AC220V and the stabilized power supply. The detection device is started through the button switch, so that the detection program is started, and the purpose of automatic detection is achieved.
Z =40, m =5, n =8, the matrix is 5 rows and 8 columns, during detection, when the detection ports of the 1 st row and the 2 nd row are connected in parallel and then connected with the anode of the insulation resistance detection table, the detection ports of the 3 rd row, the 4 th row and the 5 th row are connected in parallel and then connected with the cathode of the insulation resistance detection table, when the detection ports of the 1 st row, the 3 rd row and the 4 th row are connected in parallel and then connected with the anode of the insulation resistance detection table, the detection ports of the 2 nd row and the 5 th row are connected in parallel and then connected with the cathode of the insulation resistance detection table, when the detection ports of the 1 st row and the 3 rd row are connected in parallel and then connected with the anode of the insulation resistance detection table, the detection ports of the 2 nd row, the 4 th row and the 5 th row are connected in parallel and then connected with the anode of the insulation resistance detection table, the detection ports of the 5 th column is detected, The detection ports of the 6 th column, the 7 th column and the 8 th column are connected in parallel and then connected with the negative electrode of the insulation resistance detection meter; connecting the detection ports of the 1 st, 2 nd, 5 th and 6 th columns in parallel and then connecting the detection ports with the anode of an insulation resistance detection table, and connecting the detection ports of the 3 rd, 4 th, 7 th and 8 th columns in parallel and then connecting the detection ports with the cathode of the insulation resistance detection table; when the detection ports of the 1 st, 3 rd, 5 th and 7 th columns are connected in parallel and then connected with the anode of the insulation resistance detection table, the detection ports of the 2 nd, 4 th, 6 th and 8 th columns are connected in parallel and then connected with the cathode of the insulation resistance detection table.
The display module is used for displaying the voltage at the output end of the stabilized voltage power supply.
The invention has the beneficial effects that: compared with the prior art, the detection device has obvious effects of improving the reliability of insulation resistance detection and working efficiency, automatically completing the whole detection by detecting a detected piece below 40 terminals (including 40 terminals) by opening a switch once, reducing the frequency of quality problems and eliminating missed detection. In the process of the universal insulation resistance detection device, the manufacturability is fully considered, and the whole machine and the system are simple in manufacturing process and convenient to maintain and use; the components and parts adopt modularized and standardized design, the structure arrangement is compact, the operation is convenient, the wiring is neat, the wiring is reasonable, the detection process is simple and smooth, the maintenance is convenient, the reliability is high, and the method has important significance for improving the overall reliability of products.
Drawings
FIG. 1 is a system block diagram of an insulation resistance detection apparatus of the present invention;
FIG. 2 is a schematic circuit diagram of the insulation resistance detection apparatus of the present invention;
FIG. 3 is a schematic diagram of the PLC controller in circuit connection with a regulated power supply and a relay coil;
in the figure, 1, a display module; 2. a regulated power supply; 3. a relay group; 3-1, normally closed contacts; 3-2, normally open contacts; 4. a PLC controller; 5. a detection port; 6. a patch cord; 7. a component to be inspected.
Detailed Description
The technical solution in the embodiments of the present invention will now be clearly and completely described with reference to the accompanying drawings, which are simplified schematic drawings and only schematically illustrate the basic structure of the present invention.
As shown in fig. 1, the present invention includes a regulated power supply 2 that converts the utility power AC220V and outputs a DC24V voltage to provide an operating voltage to the PLC controller 4; still include relay group 3, relay group 3 each relay own normally open contact and normally closed contact series connection in insulation resistance detection table both ends, still establish ties between each relay own normally open contact and the normally closed contact and have a detection port 5, and every detection port 5 is connected with waiting to detect part 7 through patch cord 6.
As shown in fig. 2 and 3, the output end of the programmable logic controller PLC is connected in parallel with the relay coils of 40 relays. According to the structural characteristics of the part to be detected, a permutation and combination mode is adopted, and the PLC is used for controlling the relay coil 3-3 to generate an electric signal so as to control the on-off of the normally open contact 3-2 and the normally closed contact 3-1 of the relay, so that one part of detection points are connected in parallel and then connected with the anode of the insulation meter, and the other part of detection points are connected in parallel and then connected with the cathode of the insulation meter.
According to the structural characteristics of the part to be detected, the detection of the insulation resistance is formulated by adopting a permutation and combination mode: firstly, 40 detection ports are numbered from 1# -40#, are arranged in a matrix of 5 rows and 8 columns, and the relays are controlled to be electrified by the PLC 4, so that one part of detection points are controlled to be connected with the anode of the insulation meter after being connected in parallel, and the other part of detection points are controlled to be connected with the cathode of the insulation meter after being connected in parallel.
Detection terminal matrix arrangement table:
the detection steps are as follows:
1. connecting the 1 st row and the 2 nd row in parallel with the anode of the insulation meter, and connecting the 3 rd row, the 4 th row and the 5 th row in parallel with the cathode of the insulation meter; all the terminals of the 1 st and 2 nd rows and all the terminals of the 3 rd, 4 th and 5 th rows are detected.
2. Connecting the 1 st, 3 rd and 4 th rows in parallel with the anode of the insulation meter, and connecting the 2 nd and 5 th rows in parallel with the cathode of the insulation meter; all the terminals of the 1 st, 3 rd and 4 th rows and all the terminals of the 2 nd and 5 th rows are detected.
3. Connecting the 1 st row and the 3 rd row in parallel with the anode of the insulation meter, and connecting the 2 nd row, the 4 th row and the 5 th row in parallel with the cathode of the insulation meter; all the terminals of the 1 st and 3 rd rows and all the terminals of the 2 nd, 4 th and 5 th rows are detected.
By detecting for 1, 2, 3 or more times, the terminals in each row and the terminals in the remaining rows are detected.
4. Connecting the 1 st, 2 nd, 3 rd and 4 th columns in parallel with the anode of the insulation table, and connecting the 5 th, 6 th, 7 th and 8 th columns in parallel with the cathode of the insulation table; all terminals of the 1 st, 2 nd, 3 rd and 4 th columns and all terminals of the 5 th, 6 th, 7 th and 8 th columns are detected.
5. Connecting the 1 st, 2 nd, 5 th and 6 th columns in parallel with the anode of the insulation table, and connecting the 3 rd, 4 th, 7 th and 8 th columns in parallel with the cathode of the insulation table; all terminals of the 1 st, 2 nd, 5 th and 6 th columns and all terminals of the 3 rd, 4 th, 7 th and 8 th columns are detected.
6. Connecting the 1 st, 3 rd, 5 th and 7 th columns in parallel with the anode of the insulation table, and connecting the 2 nd, 4 th, 6 th and 8 th columns in parallel with the cathode of the insulation table; all terminals of the 1 st, 3 rd, 5 th and 7 th columns and all terminals of the 2 nd, 4 th, 6 th and 8 th columns are detected.
By detecting for more than 3 times, 4, 5, 6, the terminals in each row and the terminals in the rest rows are detected.
According to the requirement of the insulation resistance detection of the part to be detected, each terminal needs to be detected with the terminals which are not communicated with each other, and the detection between the terminals in rows and columns and between every two terminals can be realized by the 6 combined arrangement modes.
To waiting to detect the piece, when the detection terminal is not more than 40, only need insert 40 above-mentioned detection mouths with the terminal at will, PLC controller 4 carries out the detection of 6 above-mentioned combination arrangement modes automatically. Detection between all terminals can be achieved.
By using the detection device, 820 times of detection are originally needed, and the requirement can be met only by 6 times of detection. The method has obvious effects on improving the reliability of insulation resistance detection, improving the working efficiency and reducing the frequency of missed detection; the general insulation resistance detection device assembly and the parts adopt modularized and standardized design, the structure arrangement is compact, and the operation is convenient.
Claims (6)
1. The utility model provides a general insulation resistance detection device which characterized in that: the relay group (3) is composed of z relays, the anode of an insulation resistance detection meter is connected with one end of a normally closed contact (3-1) of each relay in series, the cathode of the insulation resistance detection meter is connected with one end of a normally open contact (3-2) of each relay in series, a detection port (5) is connected between the other end of the normally open contact (3-2) of each relay and the other end of the normally closed contact (3-1) of each relay in series, z detection ports (5) are arranged in total, z detection ports (5) are arranged into a matrix with m rows and n columns, and z = m × n; the PLC is used for controlling relay coils (3-3) of the relays to be electrified so that detection ports in at least two random rows/columns in the matrix are connected in parallel to the positive electrode of the insulation resistance detection meter, and detection ports in the rest rows/columns in the matrix are connected in parallel to the negative electrode of the insulation resistance detection meter, so that detection between every two detection ports is realized; the PLC controller (4) is connected with the voltage-stabilized power supply (2).
2. The universal insulation resistance detection device according to claim 1, wherein: each detection port (5) is connected with a patch cord (6) which is used for being connected with each detection terminal of a component (7) to be detected.
3. The universal insulation resistance detection device according to claim 1, wherein: the input end of the stabilized voltage power supply (2) is connected with the commercial power AC220V, and the output end of the stabilized voltage power supply (2) is DC24V voltage.
4. The universal insulation resistance detection device according to claim 1, wherein: a button switch and a high-voltage fuse are connected in series between the commercial power AC220V and the stabilized power supply (2).
5. The universal insulation resistance detection device according to claim 1, wherein: z =40, m =5, n =8, the matrix is 5 rows and 8 columns, during detection, when the detection ports of the 1 st row and the 2 nd row are connected in parallel and then connected with the anode of the insulation resistance detection table, the detection ports of the 3 rd row, the 4 th row and the 5 th row are connected in parallel and then connected with the cathode of the insulation resistance detection table, when the detection ports of the 1 st row, the 3 rd row and the 4 th row are connected in parallel and then connected with the anode of the insulation resistance detection table, the detection ports of the 2 nd row and the 5 th row are connected in parallel and then connected with the cathode of the insulation resistance detection table, when the detection ports of the 1 st row and the 3 rd row are connected in parallel and then connected with the anode of the insulation resistance detection table, the detection ports of the 2 nd row, the 4 th row and the 5 th row are connected in parallel and then connected with the anode of the insulation resistance detection table, the detection ports of the 5 th column is detected, The detection ports of the 6 th column, the 7 th column and the 8 th column are connected in parallel and then connected with the negative electrode of the insulation resistance detection meter; connecting the detection ports of the 1 st, 2 nd, 5 th and 6 th columns in parallel and then connecting the detection ports with the anode of an insulation resistance detection table, and connecting the detection ports of the 3 rd, 4 th, 7 th and 8 th columns in parallel and then connecting the detection ports with the cathode of the insulation resistance detection table; when the detection ports of the 1 st, 3 rd, 5 th and 7 th columns are connected in parallel and then connected with the anode of the insulation resistance detection table, the detection ports of the 2 nd, 4 th, 6 th and 8 th columns are connected in parallel and then connected with the cathode of the insulation resistance detection table.
6. The universal insulation resistance detection device according to claim 1, wherein: the display module (1) is used for displaying the voltage of the output end of the stabilized voltage power supply (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911222090.8A CN111308205A (en) | 2019-12-03 | 2019-12-03 | General insulation resistance detection device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911222090.8A CN111308205A (en) | 2019-12-03 | 2019-12-03 | General insulation resistance detection device |
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| CN111308205A true CN111308205A (en) | 2020-06-19 |
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| CN201911222090.8A Pending CN111308205A (en) | 2019-12-03 | 2019-12-03 | General insulation resistance detection device |
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| CN201096839Y (en) * | 2007-10-18 | 2008-08-06 | 武汉铁工科技发展有限公司 | An AC electromotor insulation resistance detection device |
| CN103558516A (en) * | 2013-10-25 | 2014-02-05 | 淮南新光神光纤线缆有限公司 | Method of testing alternating current voltage resistance performance of multi-core cable |
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| CN109725240A (en) * | 2018-11-16 | 2019-05-07 | 湖北江山重工有限责任公司 | A kind of general dielectric strength detection device |
| CN109725243A (en) * | 2018-11-16 | 2019-05-07 | 湖北江山重工有限责任公司 | Multicore cable insulating properties self-operated measuring unit |
| CN209311574U (en) * | 2018-10-30 | 2019-08-27 | 国网山西省电力公司晋城供电公司 | Fully automatic secondary insulating resistance of cable auxiliary test unit |
| CN110221171A (en) * | 2019-06-12 | 2019-09-10 | 新疆工程学院 | Logging cable insulating properties automatic detection device |
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2019
- 2019-12-03 CN CN201911222090.8A patent/CN111308205A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201096839Y (en) * | 2007-10-18 | 2008-08-06 | 武汉铁工科技发展有限公司 | An AC electromotor insulation resistance detection device |
| CN101162244A (en) * | 2007-11-21 | 2008-04-16 | 中国船舶重工集团公司第七一二研究所 | Train insulating resistance testing recorder and testing method |
| CN103558516A (en) * | 2013-10-25 | 2014-02-05 | 淮南新光神光纤线缆有限公司 | Method of testing alternating current voltage resistance performance of multi-core cable |
| CN204302441U (en) * | 2014-12-08 | 2015-04-29 | 介国安 | High-voltage motor insulated pick-up unit |
| CN209311574U (en) * | 2018-10-30 | 2019-08-27 | 国网山西省电力公司晋城供电公司 | Fully automatic secondary insulating resistance of cable auxiliary test unit |
| CN109725240A (en) * | 2018-11-16 | 2019-05-07 | 湖北江山重工有限责任公司 | A kind of general dielectric strength detection device |
| CN109725243A (en) * | 2018-11-16 | 2019-05-07 | 湖北江山重工有限责任公司 | Multicore cable insulating properties self-operated measuring unit |
| CN110221171A (en) * | 2019-06-12 | 2019-09-10 | 新疆工程学院 | Logging cable insulating properties automatic detection device |
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Application publication date: 20200619 |