CN204142884U - A kind of wireless insulating monitoring circuit - Google Patents
A kind of wireless insulating monitoring circuit Download PDFInfo
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- CN204142884U CN204142884U CN201420665396.7U CN201420665396U CN204142884U CN 204142884 U CN204142884 U CN 204142884U CN 201420665396 U CN201420665396 U CN 201420665396U CN 204142884 U CN204142884 U CN 204142884U
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Abstract
The utility model discloses a kind of wireless insulating monitoring circuit, comprise single-chip microcomputer, photoelectric coupling circuit, expansion interface circuit, amplifying circuit, high-frequency filter circuit and radio transmitter.The utility model adopts AT89C51 single-chip microcomputer and some integrated circuit (IC) chip to form minimum system, its whole circuit concentrates on a bar printing wiring board, compact conformation, volume is little, technique is simple, utilize the software function that computing machine is abundant, by sampling, memory, process data, rationally achieve robotization and the intellectuality of each bar branch road of circling measurment straight-flow system; Ground connection branch number and polarity can be shown, and adopt radio alarming mode to point out operations staff to process earth fault in time.
Description
Technical field
The utility model relates to a kind of supervisory circuit, specifically a kind of wireless insulating monitoring circuit.
Background technology
The insulating monitoring system of current routine is be made up of relay substantially, is arranged in transformer station, when this circuit has multiple-limb, cannot know specifically which branch insulation occurring and declines.Therefore, when transformer station is a certain occur having multiple branches time, occurring that thunderstorm weather causes line-to-ground or scrapes because of wind once circuit causes field branch to be suspended to overhead transmission line, which branched line what at this moment operator on duty just cannot accurately judge to break down is, can only line walking inspection completely, cause the waste of a large amount of manpower and materials, also bring great inconvenience to user power utilization simultaneously.
Utility model content
The purpose of this utility model is to provide a kind of MAX306 chip to substitute dry-reed relay in the past, makes the wireless insulating monitoring circuit that device is more simple, practical and reliable, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of wireless insulating monitoring circuit, comprise single-chip microcomputer, photoelectric coupling circuit, expansion interface circuit, amplifying circuit, high-frequency filter circuit and radio transmitter, described single-chip microcomputer connects photoelectric coupling circuit respectively, keyboard circuit, radio transmitter, display circuit, reset circuit and V/F transducer, the described photoelectric coupling circuit other end connects expansion interface circuit successively, amplifying circuit, high-frequency filter circuit, selective frequency amplifier circuit and filter amplification circuit, the filter amplification circuit other end connects the V/F transducer other end, described radio transmitter transmits signals to wireless receiving warning circuit.
As further program of the utility model: described high-frequency filter circuit comprises chip MAX292, resistance R1 and electric capacity C1, chip MAX292 pin 1 connects direct earth capacitance C1, chip MAX292 pin 8 connects input end by resistance R1, chip MAX292 pin 3 connects electric capacity C2 and resistance R4 respectively, the resistance R4 other end is contact resistance R2, resistance R3, direct earth capacitance C3 and output terminal respectively, described chip MAX292 pin 4 connects the electric capacity C2 other end and the resistance R3 other end respectively, the chip MAX292 pin 5 contact resistance R2 other end.
As further program of the utility model: described V/F transducer model is AD654, and described single-chip microcomputer model is AT89C51.
As further program of the utility model: described expansion interface circuit adopts chip MAX306.
As the utility model further scheme: described radio transmitter is GPRS radio transmitter.
Compared with prior art, the beneficial effects of the utility model are: (1) the utility model adopts AT89C51 single-chip microcomputer and some integrated circuit (IC) chip to form minimum system, and its whole circuit concentrates on a bar printing wiring board, compact conformation, volume is little, and technique is simple.(2) reliable operation, antijamming capability is strong, has " house dog ", does not have deadlock phenomenon, improve itinerant monitor system antijamming capability.(3) the utility model circuit have employed chip MAX306 and replaces traditional JAG-4-1 type dry-reed relay, achieves No-contact switch; Its polling rate is fast, and measuring error is little, substantially increases serviceable life and the functional reliability of instrument.(4) compared with traditional digital circuit, automaticity is high, favorable working performance, utilizes the software function that computing machine is abundant, by sampling, memory, process data, rationally achieves robotization and the intellectuality of each bar branch road of circling measurment straight-flow system; Ground connection branch number and polarity can be shown, and adopt radio alarming mode to point out operations staff to process earth fault in time.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram of a kind of wireless insulating monitoring circuit of the utility model;
Fig. 2 is a kind of wireless insulating monitoring circuit medium-high frequency filtering circuit circuit diagram of the utility model;
Fig. 3 is the main program block diagram of a kind of wireless insulating monitoring circuit of the utility model;
Fig. 4 is the alert program block diagram of a kind of wireless insulating monitoring circuit of the utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1 ~ 4, in the utility model embodiment, a kind of wireless insulating monitoring circuit, comprise single-chip microcomputer, photoelectric coupling circuit, expansion interface circuit, amplifying circuit, high-frequency filter circuit and radio transmitter, single-chip microcomputer connects photoelectric coupling circuit respectively, keyboard circuit, radio transmitter, display circuit, reset circuit and V/F transducer, the photoelectric coupling circuit other end connects expansion interface circuit successively, amplifying circuit, high-frequency filter circuit, selective frequency amplifier circuit and filter amplification circuit, the filter amplification circuit other end connects the V/F transducer other end, radio transmitter transmits signals to wireless receiving warning circuit.
High-frequency filter circuit comprises chip MAX292, resistance R1 and electric capacity C1, chip MAX292 pin 1 connects direct earth capacitance C1, chip MAX292 pin 8 connects input end by resistance R1, chip MAX292 pin 3 connects electric capacity C2 and resistance R4 respectively, the resistance R4 other end is contact resistance R2, resistance R3, direct earth capacitance C3 and output terminal respectively, chip MAX292 pin 4 connects the electric capacity C2 other end and the resistance R3 other end respectively, the chip MAX292 pin 5 contact resistance R2 other end.
V/F transducer model is AD654, and single-chip microcomputer model is AT89C51.
Expansion interface circuit adopts chip MAX306.
Radio transmitter is GPRS radio transmitter.
Compare with traditional dry-reed relay, the circuit that chip MAX306 forms brings the advantages such as slewing rate is fast, contactless, the life-span is long, operation circuit is simple to whole detection system.Traditional dry-reed relay has Vibrating pulse phenomenon, signal jumps very large, pulse amplitude must be escaped on software, so not only need increase filtering circuit but also extend monitoring time, dry-reed relay has the life problems of break-make number of times, once certain relay breaks down, this branch road loses detection, whole system and cisco unity malfunction.Analog switch resistance value is large, but due to operational amplifier input impedance very high, make the conducting resistance of its multi-way switch circuit negligible.There are internal system interference, external electrical field, Electromagnetic Interference etc. in generating plant, electric substation working site, and sensor is together sent various undesired signal into amplifier circuit and amplified, and has therefore been filtered into the key issue of monitoring system normal reliable work.Use common operational amplifier to form high-order active filter circuit comparatively complicated, this instrument uses chip MAX292 when hardware circuit design, and it can produce the output frequency of 0.1Hz to 25 kHz.Butterworth filter is when designing, and make lowpass band smooth as much as possible, therefore it can use as common wave filter.Although its shoulder characteristic is comparatively mild, the phase propetry of passband is very smooth, is best suited for the occasion that distortion transmits waveform very littlely.Filtering circuit, as Fig. 2, can carry out according to circuit requirement the filtering circuit that design wants exponent number during use.
After device powers on, first System self-test, after preheating 10s, device starts circling measurment using keyboard to set up voltage deviation as DC system grounding warning boundary line.Software adopts current in resistance property amplitude determining method to process, and when DC system grounding, master routine calls alert program.
Alerter service is: numeral method ground connection branch number, and constantly glimmer, GPRS module transmits to wireless receiving warning circuit, light emitting diode instruction polarity of ground, wait for field staff's processing circuitry fault, software have also been made jamming-proof design, repeatedly determines the whether true ground connection of which bar branch road, finally ground connection branch road is found out and show result.
Claims (5)
1. a wireless insulating monitoring circuit, comprise single-chip microcomputer, photoelectric coupling circuit, expansion interface circuit, amplifying circuit, high-frequency filter circuit and radio transmitter, it is characterized in that, described single-chip microcomputer connects photoelectric coupling circuit respectively, keyboard circuit, radio transmitter, display circuit, reset circuit and V/F transducer, the described photoelectric coupling circuit other end connects expansion interface circuit successively, amplifying circuit, high-frequency filter circuit, selective frequency amplifier circuit and filter amplification circuit, the filter amplification circuit other end connects the V/F transducer other end, described radio transmitter transmits signals to wireless receiving warning circuit.
2. wireless insulating monitoring circuit according to claim 1, it is characterized in that, described high-frequency filter circuit comprises chip MAX292, resistance R1 and electric capacity C1, chip MAX292 pin 1 connects direct earth capacitance C1, chip MAX292 pin 8 connects input end by resistance R1, chip MAX292 pin 3 connects electric capacity C2 and resistance R4 respectively, the resistance R4 other end is contact resistance R2 respectively, resistance R3, direct earth capacitance C3 and output terminal, described chip MAX292 pin 4 connects the electric capacity C2 other end and the resistance R3 other end respectively, the chip MAX292 pin 5 contact resistance R2 other end.
3. wireless insulating monitoring circuit according to claim 1, is characterized in that, described V/F transducer model is AD654, and described single-chip microcomputer model is AT89C51.
4. wireless insulating monitoring circuit according to claim 1, is characterized in that, described expansion interface circuit adopts chip MAX306.
5. wireless insulating monitoring circuit according to claim 1, is characterized in that, described radio transmitter is GPRS radio transmitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420665396.7U CN204142884U (en) | 2014-11-10 | 2014-11-10 | A kind of wireless insulating monitoring circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420665396.7U CN204142884U (en) | 2014-11-10 | 2014-11-10 | A kind of wireless insulating monitoring circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204142884U true CN204142884U (en) | 2015-02-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420665396.7U Expired - Fee Related CN204142884U (en) | 2014-11-10 | 2014-11-10 | A kind of wireless insulating monitoring circuit |
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| CN (1) | CN204142884U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104391225A (en) * | 2014-11-25 | 2015-03-04 | 国网河南省电力公司南阳供电公司 | Fault detection and communication positioning method for transmission line |
| CN105699844A (en) * | 2016-02-19 | 2016-06-22 | 国家电网公司 | Power distribution line short circuit fault positioning device |
-
2014
- 2014-11-10 CN CN201420665396.7U patent/CN204142884U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104391225A (en) * | 2014-11-25 | 2015-03-04 | 国网河南省电力公司南阳供电公司 | Fault detection and communication positioning method for transmission line |
| CN104391225B (en) * | 2014-11-25 | 2017-05-03 | 国网河南省电力公司南阳供电公司 | Fault detection and communication positioning method for transmission line |
| CN105699844A (en) * | 2016-02-19 | 2016-06-22 | 国家电网公司 | Power distribution line short circuit fault positioning device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150204 Termination date: 20151110 |
|
| EXPY | Termination of patent right or utility model |