CN105092978A - Online monitoring and offline detection dual-purpose insulation resistance tester - Google Patents
Online monitoring and offline detection dual-purpose insulation resistance tester Download PDFInfo
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- CN105092978A CN105092978A CN201510594253.0A CN201510594253A CN105092978A CN 105092978 A CN105092978 A CN 105092978A CN 201510594253 A CN201510594253 A CN 201510594253A CN 105092978 A CN105092978 A CN 105092978A
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Abstract
The invention discloses an online monitoring and offline detection dual-purpose insulation resistance tester comprising an offline test voltage source, a voltage and current analog sampling circuit, a voltage, current, temperature and humidity analog channel selection and demodulation circuit, a digital-analog isolation and AD conversion circuit, a single-chip microcomputer and a peripheral interface circuit. The output end of the offline test voltage source is connected with the input end of the analog sampling circuit. The output end of the analog sampling circuit is connected with the input end of the analog channel selection and demodulation circuit. The output end of the analog channel selection and demodulation circuit is connected with the input end of the digital-analog isolation and AD conversion circuit. The output end of the digital-analog isolation and AD conversion circuit is connected with the input end of the single-chip microcomputer. The output end of the single-chip microcomputer is connected with the input end of the peripheral interface circuit. Two test means of offline testing and online monitoring are provided, and temperature and humidity parameters are introduced so that problems in production and electrical appliance daily maintenance are solved, and thus popularization value is quite high.
Description
Technical field
The present invention relates to electric circuit inspection technical field, specifically, is the dual-purpose Insulation Resistance Tester of a kind of on-line monitoring and non-on-line checkingi.
Background technology
Insulation Resistance Tester, be commonly called megohmmeter or megger, being widely used in the insulation resistance measuring generator, motor, power transformer, distribution, electrical equipment and other electric device (as control, signal, communicating and the cable of power supply), is important means and the foundation of safety detection.The mode measured is the principle according to Ohm law, and each test point applies a DC voltage, then measuring voltage and current value is distinguished, resistance value is calculated again according to Ohm law, they are often used to the change carrying out indication motor insulation resistance within several months or several years in routine maintenance, if there is larger change in insulation resistance, just may imply that potential fault, and these detections above are all carry out when electrical appliance inoperative, cannot measure insulation resistance electrical appliance is in running order, and be exactly can not be out-of-work and customary detection can not ensure insulating resistance value all the time all in safe range at well multi-field electrical appliance.In addition, this parameter of the environment residing for electrical appliance is also very large on the impact of insulation resistance, the south of such as China and the north, winter and summer isothermal humidity difference all very large.Here it is causes and obviously produces that to detect be qualified, and the reason that when detecting to client, insulation resistance data is mutually far short of what is expected.
Summary of the invention
Goal of the invention: the object of the invention is to solve deficiency of the prior art, a kind of on-line monitoring and the dual-purpose Insulation Resistance Tester of non-on-line monitoring are provided, the changeable online and non-online duty of this tester, and introduce the insulation measurement larger temperature of impact and humidity two important parameters.
Technical scheme: for achieving the above object, a kind of on-line monitoring and the dual-purpose Insulation Resistance Tester of non-on-line checkingi, comprise: non-on-line testing voltage source circuit module, voltage, current analog sample circuit module, voltage, electric current, temperature, humidity simulation channel selecting and detecting circuit module, digital-to-analogue isolation and A/D convertor circuit module, one-chip computer module, peripheral interface circuit module, the output terminal of described non-on-line testing voltage source circuit module and described voltage, the input end of current analog sample circuit module connects, described voltage, the output terminal of current analog sample circuit module and temperature, humidity simulation channel selecting and detecting circuit module input connect, described humidity simulation channel selecting and detecting circuit module output terminal are isolated with digital-to-analogue and are connected with the input end of A/D convertor circuit module, described digital-to-analogue isolation is connected with the input end of one-chip computer module with the output terminal of A/D convertor circuit module, the output terminal of described one-chip computer module is connected with the input end of peripheral circuit interface module.
Non-on-line testing voltage source module of the present invention changes online and non-on-line testing voltage signal by relay J K8, the online and non-on-line instrument test lead by relay J K1 conversion.
This described voltage, current analog sample circuit module switch online and non-online simulation signal by relay J K8, realize automatically selecting insulating resistance value by the size of signal by transfer relay JK9.
The presence voltage of voltage of the present invention, current analog sample circuit module, non-presence voltage, the non-simulant electronic switch flowed to respectively in line current in voltage, electric current, temperature, humidity simulation channel selecting and detecting circuit module.
Simulant electronic switch in voltage of the present invention, electric current, temperature, humidity simulation channel selecting and detecting circuit module also introduces temperature, moisture signal.
The non-line voltage detection scope of on-line monitoring and the dual-purpose Insulation Resistance Tester of non-on-line checkingi is DC50V-1000V ± 5%, line voltage detection scope is AC/DC50V-500V ± 5%, Temperature displaying scope is-15 DEG C-45 DEG C ± 0.5, humidity display scope is 0%-100%RH(20%-90% ± 3%), insulation resistance scope is 0.5M Ω-10000M Ω, and the non-on-line checkingi time is 0-999s.
Beneficial effect: the Insulation Resistance Tester of a kind of on-line monitoring of the present invention and non-on-line checkingi, has the following advantages:
1, the Insulation Resistance Tester of a kind of on-line monitoring of the present invention and non-on-line checkingi, can actual conditions switch online and non-presence.
2, during non-on-line checkingi, between tested product 2, apply constant voltage, the current value between detecting at 2, calculates insulating resistance value.Magnitude of voltage and insulating resistance value bound can be arranged, acousto-optic hint time defective; By Temperature Humidity Sensor, measure the temperature of prevailing circumstances; Can preserve, print, upload magnitude of voltage, insulating resistance value, test duration, temperature value, humidity value.
3, during on-line monitoring, round-the-clockly work can be carried out; Insulating resistance value can be calculated by the magnitude of voltage at the tested product two ends of measurement, current value; Insulating resistance value bound can be arranged, acousto-optic hint time defective, and can be connected with the system of client when measuring insulation resistance and being defective, cuts off the operating voltage of electrical appliance, to protect personal safety and to reduce economic loss; By Temperature Humidity Sensor, measure the temperature of environment all the time; Can preserve one group of data (voltage, resistance, temperature, humidity) at interval of one end time, data can preserve, upload printing.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is non-on-line testing voltage source circuit figure.
Fig. 3 is voltage, current analog sample circuit figure.
Fig. 4 is voltage, electric current, temperature, humidity simulation channel selecting and detecting circuit figure.
Fig. 5 is number electric isolution and A/D convertor circuit figure.
Fig. 6 is single-chip microcomputer STC12C5A60S2 pin schematic diagram.
Fig. 7 is peripheral interface circuit figure.
Embodiment
Below in conjunction with the drawings and specific embodiments, illustrate the present invention further.
A kind of on-line monitoring and the dual-purpose Insulation Resistance Tester of non-on-line checkingi as shown in Figure 1, comprise: non-on-line testing voltage source circuit module 1, voltage, current analog sample circuit module 2, voltage, electric current, temperature, humidity simulation channel selecting and detecting circuit module 3, digital-to-analogue isolation and A/D convertor circuit module 4, one-chip computer module 5, peripheral interface circuit module 6, the output terminal of described non-on-line testing voltage source circuit module 1 and described voltage, the input end of current analog sample circuit module 2 connects, described voltage, the output terminal of current analog sample circuit module 2 and temperature, humidity simulation channel selecting and detecting circuit module 3 input end connect, described humidity simulation channel selecting and detecting circuit module 3 output terminal are isolated with digital-to-analogue and are connected with the input end of A/D convertor circuit module 4, described digital-to-analogue isolation is connected with the input end of one-chip computer module 5 with the output terminal of A/D convertor circuit module 4, the output terminal of described one-chip computer module 5 is connected with the input end of peripheral circuit interface module 6.
The principle of work of on-line monitoring and the dual-purpose Insulation Resistance Tester of non-on-line checkingi: as shown in Figure 2, non-on-line testing voltage source 1 is online with non-on-line testing voltage signal by relay J K8 conversion, online with non-on-line instrument test lead by JK1 conversion.As shown in Figure 2, voltage, current analog sample circuit switch online and non-online simulation signal JY1-V, JY-V by relay J K8; As shown in Figure 3, the size being reached through signal by transfer relay JK9, JK10, JK11 selects the object of each gear of insulating resistance value 0.5-10M Ω, 10-100M Ω, 100-1000M Ω, 1000-10000M Ω automatically.As shown in Fig. 4 to Fig. 5, the non-presence voltage of JY1-V presence voltage, JY-VZ, JY-A current signal give simulant electronic switch CD4052 respectively, simulant electronic switch CD4052 also introduces temperature, moisture signal simultaneously, through the selection of simulant electronic switch, signal is carried out after detecting circuit carries out detection, send into digital-to-analogue isolation and the AD7705 in A/D convertor circuit again.The signal of AD7705 conversion is given CPU through Phototube Coupling and is carried out data processing.
See Fig. 6 to Fig. 7, in the present embodiment, STC12C5A60S2 chip selected by single-chip microcomputer 5, P1.2, P1.3 and P3.0, P3.1 and 232 chips constitute two serial ports, and serial ports 1 is connected with liquid crystal display serial ports and communicates, and serial ports 2 is for carrying out communicating and data upload with PC; The test of P3.2, P3.3 control instrument and stopping; P3.4 is connected with printer; P3.5 is defective signal output, is connected for driving relay by phase inverter 74LS04 with 2803, can be connected the object reaching and cut off electrical appliance operating voltage with client; P1.6 exports test signal; P0.0, P0.1 are simulant electronic switch sorting signals; P0.4-P0.7 is each relay control signal; The read-write of P2.0-P2.1 storage chip, to reach the object that data are preserved.
Embodiment is only not used in for illustration of the present invention and limits the scope of the invention, and after having read the present invention, the amendment of those skilled in the art to the various equivalent form of value of the present invention all falls within the application's claims limited range.
Claims (9)
1. on-line monitoring and the dual-purpose Insulation Resistance Tester of non-on-line checkingi, is characterized in that: comprising: non-on-line testing voltage source circuit module (1), voltage, current analog sample circuit module (2), voltage, electric current, temperature, humidity simulation channel selecting and detecting circuit module (3), digital-to-analogue isolation and A/D convertor circuit module (4), one-chip computer module (5), peripheral interface circuit module (6), the output terminal of described non-on-line testing voltage source circuit module (1) and described voltage, the input end of current analog sample circuit module (2) connects, described voltage, the output terminal of current analog sample circuit module (2) and voltage, electric current, temperature, humidity simulation channel selecting and detecting circuit module (3) input end connect, described voltage, electric current, temperature, humidity simulation channel selecting and detecting circuit module (3) output terminal are isolated with digital-to-analogue and are connected with the input end of A/D convertor circuit module (4), described digital-to-analogue isolation is connected with the input end of one-chip computer module (5) with the output terminal of A/D convertor circuit module (4), and the output terminal of described one-chip computer module (5) is connected with the input end of peripheral interface circuit module (6).
2. a kind of on-line monitoring according to claim 1 and the dual-purpose Insulation Resistance Tester of non-on-line checkingi, it is characterized in that: in described non-on-line testing voltage source module (1), change online and non-on-line testing voltage signal by relay J K8, the online and non-on-line instrument test lead by relay J K1 conversion.
3. a kind of on-line monitoring according to claim 1 and the dual-purpose Insulation Resistance Tester of non-on-line checkingi, it is characterized in that: described voltage, current analog sample circuit module (2) switch online and non-online simulation signal by relay J K8, realize automatically selecting insulating resistance value by the size of signal by transfer relay JK9.
4. a kind of on-line monitoring according to claim 1 and the dual-purpose Insulation Resistance Tester of non-on-line checkingi, is characterized in that: the presence voltage of described voltage, current analog sample circuit module (2), non-presence voltage, the non-simulant electronic switch flowed to respectively in line current in voltage, electric current, temperature, humidity simulation channel selecting and detecting circuit module (3).
5. a kind of on-line monitoring according to claim 1 and the dual-purpose Insulation Resistance Tester of non-on-line checkingi, is characterized in that: the simulant electronic switch in described voltage, electric current, temperature, humidity simulation channel selecting and detecting circuit module (3) introduces temperature, moisture signal.
6. a kind of on-line monitoring according to claim 1 and the dual-purpose Insulation Resistance Tester of non-on-line checkingi, it is characterized in that: the non-line voltage detection scope of described on-line monitoring and the dual-purpose Insulation Resistance Tester of non-on-line checkingi is DC50V-1000V ± 5%, and line voltage detection scope is AC/DC50V-500V ± 5%.
7. a kind of on-line monitoring according to claim 1 and the dual-purpose Insulation Resistance Tester of non-on-line checkingi, it is characterized in that: the Temperature displaying scope of described on-line monitoring and the dual-purpose Insulation Resistance Tester of non-on-line checkingi is-15 DEG C-45 DEG C ± 0.5, and humidity display scope is 0%-100%RH(20%-90% ± 3%).
8. a kind of on-line monitoring according to claim 1 and the dual-purpose Insulation Resistance Tester of non-on-line checkingi, is characterized in that: the insulation resistance scope of described on-line monitoring and the dual-purpose Insulation Resistance Tester of non-on-line checkingi is 0.5M Ω-10000M Ω.
9. a kind of on-line monitoring according to claim 1 and the dual-purpose Insulation Resistance Tester of non-on-line checkingi, is characterized in that: the non-on-line checkingi time of described on-line monitoring and the dual-purpose Insulation Resistance Tester of non-on-line checkingi is 0-999s.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510594253.0A CN105092978A (en) | 2015-09-17 | 2015-09-17 | Online monitoring and offline detection dual-purpose insulation resistance tester |
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| CN201510594253.0A CN105092978A (en) | 2015-09-17 | 2015-09-17 | Online monitoring and offline detection dual-purpose insulation resistance tester |
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| CN107831425A (en) * | 2017-12-15 | 2018-03-23 | 株洲中车电气科技有限公司 | A kind of train comprehensive intelligent insulation detecting method and system and device |
| CN110609221A (en) * | 2019-11-05 | 2019-12-24 | 西南石油大学 | Automatic monitoring device for pipeline insulating joint and application method thereof |
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Cited By (2)
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| CN110609221A (en) * | 2019-11-05 | 2019-12-24 | 西南石油大学 | Automatic monitoring device for pipeline insulating joint and application method thereof |
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Application publication date: 20151125 |
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