CN104485739B - Power monitoring circuit protection device and guard method - Google Patents
Power monitoring circuit protection device and guard method Download PDFInfo
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- CN104485739B CN104485739B CN201410745220.7A CN201410745220A CN104485739B CN 104485739 B CN104485739 B CN 104485739B CN 201410745220 A CN201410745220 A CN 201410745220A CN 104485739 B CN104485739 B CN 104485739B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
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Abstract
The present invention proposes a kind of power monitoring circuit protection device and guard method; including: switching value input circuit, simulated measurement input circuit, switching value output circuit, alarm module, central processing unit; switching value input circuit signal output part connects central processing unit on-off model input; described central processing unit on-off model outfan connecting valve amount output circuit signal input part; simulated measurement input circuit connects central processing unit analog digital conversion signal input part by analog to digital conversion circuit, and described central processing unit display signal output part connects alarm module。
Description
Technical field
The present invention relates to electronic circuit field, particularly relate to a kind of power monitoring circuit protection device and guard method。
Background technology
Society; national grid coverage rate generally improves; bring great convenience to the productive life of people; while electrical network coverage rate improves; safe operation of electric network and stable monitoring system are not promoted timely; even if having developed some power monitoring circuit equipment; its service life is short; saltus step is serious; can not overvoltage protection, can not prevent filtering interference, so causing power monitoring circuit error; can not accurately judge power circuit problem, so needing those skilled in the art badly to solve corresponding technical problem。
Summary of the invention
It is contemplated that at least solve the technical problem existed in prior art, especially innovatively propose a kind of power monitoring circuit protection device。
In order to realize the above-mentioned purpose of the present invention, the invention provides a kind of power monitoring circuit protection device, it is it is critical that include: switching value input circuit, simulated measurement input circuit, switching value output circuit, alarm module, central processing unit,
Switching value input circuit signal output part connects central processing unit on-off model input, described central processing unit on-off model outfan connecting valve amount output circuit signal input part, simulated measurement input circuit connects central processing unit analog digital conversion signal input part by analog to digital conversion circuit, and described central processing unit display signal output part connects alarm module。
Having the beneficial effect that of technique scheme transmits the real-time power supply situation of power circuit by switching value input circuit and simulated measurement input circuit, ensure power circuit steady operation, using state by alarm module real-time reminding custom power circuit, circuit design is reasonable, moderate cost。
Described power monitoring circuit protection device, it is preferred that described switching value input circuit includes: the 11st resistance, the 12nd resistance, the 13rd resistance, the 16th diode, the first photoelectric coupled circuit,
On-off circuit one end connects the 11st resistance one end, the described 11st resistance other end connects the 12nd resistance one end, the described 12nd resistance other end connects the first photoelectric coupled circuit first input end, described first photoelectric coupled circuit the 3rd input connects the 16th diode cathode, described 16th diode cathode is also connected with power supply, described 16th diode cathode connects the 12nd resistance other end, described first photoelectric coupled circuit the 6th outfan connects power supply, and described first photoelectric coupled circuit the 4th outfan connects central processing unit signal input part。
Technique scheme have the beneficial effect that described switching value input circuit gather On-off signal signal, it is ensured that stable signal transmission。
Described power monitoring circuit protection device, it is preferred that described switching value output circuit includes: the 41st resistance, the second photoelectric coupled circuit, relay,
41st resistance one end connects central processing unit switching value output signal end, the described 41st resistance other end connects the second photoelectric coupled circuit first input end, described second photoelectric coupled circuit the 3rd input connects ground, and described second photoelectric coupled circuit the 6th outfan connects relay normally-closed contact。
Having the beneficial effect that of technique scheme exports signal by central processing unit transmitting switch amount, is ensured the stability of transmission signal by switching value output circuit。
Described power monitoring circuit protection device, it is preferred that described simulated measurement input circuit includes: circuit of sampling input, reference signal initialization circuit, frequency conversion process circuit,
Circuit of sampling input frequency variation signal outfan rate of connections conversion process circuit signal input, described frequency conversion process circuit signal outfan connects central processing unit analog digital conversion signal input part, reference signal initialization circuit reference voltage output terminal connects circuit of sampling input reference voltage input terminal, described reference signal initialization circuit reference signal outfan rate of connections conversion process circuit reference signal input part。
Technique scheme have the beneficial effect that by circuit of sampling input, reference signal initialization circuit, frequency conversion process circuit coordinated, it is ensured that the transmission of analog input signal。
Described power monitoring circuit protection device, it is preferred that described circuit of sampling input includes: the 14th resistance, the 19th resistance, the 4th amplifier, the 6th high tension silicon rectifier,
Electric power signal analog quantity first input end connects the 14th resistance one end, the described 14th resistance other end connects the 6th high tension silicon rectifier first input end, electric power signal analog quantity the second input connects the 6th high tension silicon rectifier the second input, described 6th high tension silicon rectifier the 3rd outfan connects the 19th resistance one end, the described 19th resistance other end connects the 6th high tension silicon rectifier the 4th outfan, described 19th resistance one end is also connected with the 4th amplifier anode, described 4th amplifier minus earth；
Described circuit of sampling input also includes: the 34th resistance, the 39th resistance, the 14th amplifier, the 7th high tension silicon rectifier,
Electric power signal analog quantity first input end connects the 34th resistance one end, the described 34th resistance other end connects the 7th high tension silicon rectifier first input end, electric power signal analog quantity the second input connects the 7th high tension silicon rectifier the second input, described 7th high tension silicon rectifier the 3rd outfan connects the 39th resistance one end, the described 39th resistance other end connects the 7th high tension silicon rectifier the 4th outfan, described 39th resistance one end is also connected with the 14th amplifier anode, described 14th amplifier minus earth。
Technique scheme have the beneficial effect that circuit of sampling input stable signal transmission is reliable。
Described power monitoring circuit protection device; preferably; described reference signal initialization circuit includes: the 23rd resistance, the 24th resistance, the 25th resistance, the 26th resistance, the 15th diode, the 5th electric capacity, the 11st electric capacity, the 13rd electric capacity, the 14th electric capacity, the 5th amplifier, the 6th amplifier
Power end connects the 23rd resistance one end, the described 23rd resistance other end connects the 15th diode cathode, described 15th diode cathode ground connection, the described 23rd resistance other end is also connected with the 5th electric capacity one end, the described 5th electric capacity other end connects the 25th resistance one end and ground connection, the described 25th resistance other end connects the 24th resistance one end, the described 24th resistance other end connects the 5th electric capacity one end, described 24th resistance one end is also connected with the 11st electric capacity one end, described 11st electric capacity other end ground connection, described 11st electric capacity one end is also connected with the 13rd electric capacity one end, described 13rd electric capacity other end ground connection, described 24th resistance one end is also connected with the 26th resistance one end, the described 26th resistance other end connects the 14th electric capacity one end, described 14th electric capacity other end ground connection, described 13rd electric capacity one end is also connected with the 5th amplifier anode and the 6th amplifier anode, described 5th amplifier negative pole connects the 5th amplifier out, described 6th amplifier negative pole connects the 6th amplifier out, described 5th amplifier out connects the 6th high tension silicon rectifier the 4th outfan, described 6th amplifier out connects the 7th high tension silicon rectifier the 4th outfan。
Technique scheme have the beneficial effect that reference signal initialization circuit arranges reference signal value, be transferred in circuit of sampling input, it is provided that reference signal value, be used for comparing output voltage and be transferred to central processing unit。
Described power monitoring circuit protection device; preferably; described frequency conversion process circuit also includes: the 15th resistance, the 16th resistance, the 17th resistance, the 18th resistance, the 29th resistance, the 27th resistance, the 30th resistance, the 11st diode, the 12nd diode, the 15th electric capacity, the first amplifier, the second amplifier, the 3rd amplifier
4th amplifier out connects the 15th resistance one end, the described 15th resistance other end connects the second amplifier anode and the 16th resistance one end respectively, described second amplifier negative pole connects the second amplifier out, described second amplifier out connects the 29th resistance one end, the described 29th resistance other end connects the 11st diode cathode respectively, 12nd diode cathode and the 15th electric capacity one end, described 11st diode cathode, after 12nd diode cathode and the 15th electric capacity other end connect, connect the first amplifier negative pole again, described first amplifier anode connects the 15th electric capacity one end, described first amplifier out connects the 30th resistance one end, the described 30th resistance other end connects power supply, described first amplifier out is also connected with central processing unit, described 11st diode cathode, after 12nd diode cathode and the 15th electric capacity other end connect, it is also connected with the 27th resistance one end, the described 27th resistance other end connects the 3rd amplifier out, described 3rd amplifier out is also connected with the 3rd amplifier negative pole, one end after described 3rd amplifier anode connection the 17th resistance and the 18th resistor coupled in parallel, described 17th resistance connects the 14th amplifier out。
Technique scheme have the beneficial effect that frequency conversion process circuit design circuit location wiring is reasonable, carrying out frequency processing can separate with clock frequency。
Described power monitoring circuit protection device; preferably; described frequency conversion process circuit also includes: the 7th amplifier, the 8th amplifier, the 9th amplifier, the 21st resistance, the 22nd resistance, the 28th resistance, the 13rd diode, the 14th diode, the 8th electric capacity
14th amplifier out connects the 8th amplifier anode, described 8th amplifier negative pole connects the 8th amplifier out, described 8th amplifier out is also connected with the 22nd resistance one end, the 22nd resistance other end connects the 13rd diode cathode, described 13rd diode cathode connects the 21st resistance one end and the 14th diode cathode respectively, described 14th diode cathode connects the 13rd diode cathode and the 8th electric capacity one end, the described 8th electric capacity other end connects the 14th diode cathode and the 7th amplifier negative pole, described 8th electric capacity one end is also connected with the 7th amplifier anode, described 7th amplifier out connects the 28th resistance one end, the described 28th resistance other end connects power supply, the 21st resistance other end connects the 9th amplifier out, described 9th amplifier out is also connected with the 9th amplifier negative pole。
Technique scheme have the beneficial effect that frequency conversion process circuit design circuit location wiring is reasonable, carrying out frequency processing can separate with clock frequency。
Described power monitoring circuit protection device, preferably, also include anti-jump loop, described anti-jump loop is connected with relay, described anti-jump loop includes: the first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, 6th resistance, 7th resistance, 8th resistance, 9th resistance, tenth resistance, first relay, second relay, first diode, second diode, 3rd diode, 4th diode, 5th diode, 6th diode, 7th diode, 8th diode, 9th diode, tenth diode, first electric capacity, second electric capacity,
First relay normally open contact connects first resistance one end, the described first resistance other end connects second resistance one end, the second resistance other end connects the 3rd resistance one end, the described 3rd resistance other end connects the 4th resistance one end, the described 4th resistance other end connects the 9th resistance one end, the described 9th resistance other end connects the 4th diode cathode and the 6th diode cathode, the 4th resistance other end is also connected with the 3rd diode cathode and the 5th diode cathode, first relay normally-closed contact connects the first diode cathode and first electric capacity one end, described first diode cathode connects the first electric capacity other end, described first electric capacity one end is also connected with the 3rd diode cathode and the 4th diode cathode, described 5th diode cathode connects the 6th diode cathode, the described 9th resistance other end is also connected with the tenth resistance other end；
Second relay normally open contact connects the 5th resistance one end, the described 5th resistance other end connects the 6th resistance one end, the described 6th resistance other end connects the 7th resistance one end, the described 7th resistance other end connects the 8th resistance one end, the described 8th resistance other end connects the tenth resistance one end, the described tenth resistance other end connects the 8th diode cathode and the tenth diode cathode, described second relay normally-closed contact connects the second diode cathode and second electric capacity one end, described second diode cathode connects the second electric capacity other end, described second electric capacity one end is also connected with the 7th diode cathode and the 8th diode cathode, described 7th diode cathode connects the tenth resistance one end and the 9th diode cathode respectively, described 9th diode cathode connects the tenth diode cathode, described 8th diode cathode connects the tenth diode cathode, described 8th diode cathode is also connected with the tenth resistance other end。
Technique scheme have the beneficial effect that above-mentioned anti-jump loop AC/DC universal; adapt to different running environment; adaptable; prevent because the combined floodgate contact controlling switch fails to return in time; and combined floodgate causes chopper to close continuously on faulty line and cuts; prevent from, because the chopper auxiliary node of trip(ping) circuit adjusts improper or conjugates slow, causing protection contact elder generation current interruption to burn simultaneously。
Invention additionally discloses a kind of power monitoring circuit guard method, it is it is critical that comprise the steps:
Step 1, when taking current protection state, current-mode analog quantity sample circuit and voltage analog sample circuit start to gather data, the data of storage chip storage are resolved by CPU with the data of frequency conversion process circuit collection, warning alert is carried out by central processing unit by alarm module when current signal is more than current ration, on screen, show information warning simultaneously, output control is carried out by relay, if detection is not greater than current ration, return and again carry out cpu signal parsing, when voltage signal receives and presses off lock signal again, information warning is sent by central processing unit, reported to the police by alarm module, screen shows information warning simultaneously, output control is carried out by relay, lock signal is pressed off again if do not received, return and again carry out cpu signal parsing；
Step 2, when taking under-voltage protection state, current-mode analog quantity sample circuit and voltage analog sample circuit start to gather data, the data of storage chip storage are resolved by CPU with the data of frequency conversion process circuit collection, warning alert is carried out by central processing unit by alarm module when voltage signal is more than voltage definite value, on screen, show information warning simultaneously, output control is carried out by relay, if detection is not greater than voltage definite value, return and again carry out cpu signal parsing, when on-off model receives and opens into conjunction position signal, information warning is sent by central processing unit, reported to the police by alarm module, screen shows information warning simultaneously, output control is carried out by relay, open into conjunction position signal if do not received, return and again carry out cpu signal parsing；
Step 3, when taking reclosing guard mode, current-mode analog quantity sample circuit and voltage analog sample circuit start to gather data, the data of storage chip storage are resolved by CPU with the data of frequency conversion process circuit collection, warning alert is carried out by central processing unit by alarm module when current signal is more than current ration, on screen, show information warning simultaneously, output control is carried out by relay, if detection is not greater than current ration, return and again carry out cpu signal parsing, when voltage signal receives and presses off lock signal again, information warning is sent by central processing unit, reported to the police by alarm module, screen shows information warning simultaneously, output control is carried out by relay, lock signal is pressed off again if do not received, return and again carry out cpu signal parsing；When on-off model receives and opens into conjunction position signal, central processing unit send information warning, reported to the police by alarm module, screen shows information warning simultaneously, carry out output control by relay, opening into conjunction position signal if do not received, returning and again carrying out cpu signal parsing。
Technique scheme have the beneficial effect that by said method can monitor in real time power circuit, run safety and stability。
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
It is reasonable that described monitoring and protecting device relates to circuit; working stability; wherein switching value input circuit, switching value output circuit meet AC and DC environment; adapt to environment extensive; the optocoupler cost used is low, and wherein simulated measurement input circuit is with low cost, meets the working condition of power monitoring circuit; frequency conversion process circuit output signal is stable, and described isolation circuit saves cost。
The additional aspect of the present invention and advantage will part provide in the following description, and part will become apparent from the description below, or is recognized by the practice of the present invention。
Accompanying drawing explanation
Above-mentioned and/or the additional aspect of the present invention and advantage are from conjunction with will be apparent from easy to understand the accompanying drawings below description to embodiment, wherein:
Fig. 1 is power monitoring circuit of the present invention protection device general illustration；
Fig. 2 is power monitoring circuit of the present invention protection device switching value input circuit schematic diagram；
Fig. 3 is power monitoring circuit of the present invention protection device switching value output circuit schematic diagram；
Fig. 4 is power monitoring circuit of the present invention protection device switching value output circuit schematic diagram；
Fig. 5 is power monitoring circuit of the present invention protection device reference signal initialization circuit schematic diagram；
Fig. 6 is power monitoring circuit of the present invention protection device frequency conversion process circuit diagram；
Fig. 7 is power monitoring circuit of the present invention protection device frequency conversion process circuit diagram；
Fig. 8 is power monitoring circuit of the present invention protection installation's power source circuit diagram；
Fig. 9 is power monitoring circuit of the present invention protection device anti-jump loop schematic diagram；
Figure 10-12 is the workflow diagram of power monitoring circuit guard method of the present invention。
Detailed description of the invention
Being described below in detail embodiments of the invention, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of same or like function from start to finish。The embodiment described below with reference to accompanying drawing is illustrative of, and is only used for explaining the present invention, and is not considered as limiting the invention。
In describing the invention, it will be appreciated that, term " longitudinal direction ", " transverse direction ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end " " interior ", the orientation of the instruction such as " outward " or position relationship be based on orientation shown in the drawings or position relationship, it is for only for ease of the description present invention and simplifies description, rather than instruction or hint indication device or element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention。
In describing the invention, unless otherwise prescribed and limit, it should be noted that term " installation ", " being connected ", " connection " should be interpreted broadly, for instance, can be mechanically connected or electrical connection, can also be the connection of two element internals, it is possible to be joined directly together, it is also possible to be indirectly connected to by intermediary, for the ordinary skill in the art, it is possible to understand the concrete meaning of above-mentioned term as the case may be。
As it is shown in figure 1, the invention provides a kind of power monitoring circuit protection device, it is it is critical that include: switching value input circuit, simulated measurement input circuit, switching value output circuit, alarm module, central processing unit,
Switching value input circuit signal output part connects central processing unit on-off model input, described central processing unit on-off model outfan connecting valve amount output circuit signal input part, simulated measurement input circuit connects central processing unit analog digital conversion signal input part by analog to digital conversion circuit, and described central processing unit display signal output part connects alarm module。
Having the beneficial effect that of technique scheme transmits the real-time power supply situation of power circuit by switching value input circuit and simulated measurement input circuit, ensure power circuit steady operation, using state by alarm module real-time reminding custom power circuit, circuit design is reasonable, moderate cost。
As in figure 2 it is shown, described power monitoring circuit protection device, it is preferred that described switching value input circuit includes: the 11st resistance, the 12nd resistance, the 13rd resistance, the 16th diode, the first photoelectric coupled circuit,
On-off circuit one end connects the 11st resistance one end, the described 11st resistance other end connects the 12nd resistance one end, the described 12nd resistance other end connects the first photoelectric coupled circuit first input end, described first photoelectric coupled circuit the 3rd input connects the 16th diode cathode, described 16th diode cathode is also connected with power supply, described 16th diode cathode connects the 12nd resistance other end, described first photoelectric coupled circuit the 6th outfan connects power supply, and described first photoelectric coupled circuit the 4th outfan connects central processing unit signal input part。
Technique scheme have the beneficial effect that described switching value input circuit gather On-off signal signal, it is ensured that stable signal transmission。
As it is shown on figure 3, described power monitoring circuit protection device, it is preferred that described switching value output circuit includes: the 41st resistance, the second photoelectric coupled circuit, relay,
41st resistance one end connects central processing unit switching value output signal end, the described 41st resistance other end connects the second photoelectric coupled circuit first input end, described second photoelectric coupled circuit the 3rd input connects ground, and described second photoelectric coupled circuit the 6th outfan connects relay normally-closed contact。
Having the beneficial effect that of technique scheme exports signal by central processing unit transmitting switch amount, is ensured the stability of transmission signal by switching value output circuit。
As shown in figs. 4-7, described power monitoring circuit protection device, it is preferred that described simulated measurement input circuit includes: circuit of sampling input, reference signal initialization circuit, frequency conversion process circuit,
Circuit of sampling input frequency variation signal outfan rate of connections conversion process circuit signal input, described frequency conversion process circuit signal outfan connects central processing unit analog digital conversion signal input part, reference signal initialization circuit reference voltage output terminal connects circuit of sampling input reference voltage input terminal, described reference signal initialization circuit reference signal outfan rate of connections conversion process circuit reference signal input part。
Technique scheme have the beneficial effect that by circuit of sampling input, reference signal initialization circuit, frequency conversion process circuit coordinated, it is ensured that the transmission of analog input signal。
Described power monitoring circuit protection device, it is preferred that described circuit of sampling input includes: the 14th resistance, the 19th resistance, the 4th amplifier, the 6th high tension silicon rectifier,
Electric power signal analog quantity first input end connects the 14th resistance one end, the described 14th resistance other end connects the 6th high tension silicon rectifier first input end, electric power signal analog quantity the second input connects the 6th high tension silicon rectifier the second input, described 6th high tension silicon rectifier the 3rd outfan connects the 19th resistance one end, the described 19th resistance other end connects the 6th high tension silicon rectifier the 4th outfan, described 19th resistance one end is also connected with the 4th amplifier anode, described 4th amplifier minus earth；
Described circuit of sampling input also includes: the 34th resistance, the 39th resistance, the 14th amplifier, the 7th high tension silicon rectifier,
Electric power signal analog quantity first input end connects the 34th resistance one end, the described 34th resistance other end connects the 7th high tension silicon rectifier first input end, electric power signal analog quantity the second input connects the 7th high tension silicon rectifier the second input, described 7th high tension silicon rectifier the 3rd outfan connects the 39th resistance one end, the described 39th resistance other end connects the 7th high tension silicon rectifier the 4th outfan, described 39th resistance one end is also connected with the 14th amplifier anode, described 14th amplifier minus earth。
Technique scheme have the beneficial effect that circuit of sampling input stable signal transmission is reliable。
Described power monitoring circuit protection device; preferably; described reference signal initialization circuit includes: the 23rd resistance, the 24th resistance, the 25th resistance, the 26th resistance, the 15th diode, the 5th electric capacity, the 11st electric capacity, the 13rd electric capacity, the 14th electric capacity, the 5th amplifier, the 6th amplifier
Power end connects the 23rd resistance one end, the described 23rd resistance other end connects the 15th diode cathode, described 15th diode cathode ground connection, the described 23rd resistance other end is also connected with the 5th electric capacity one end, the described 5th electric capacity other end connects the 25th resistance one end and ground connection, the described 25th resistance other end connects the 24th resistance one end, the described 24th resistance other end connects the 5th electric capacity one end, described 24th resistance one end is also connected with the 11st electric capacity one end, described 11st electric capacity other end ground connection, described 11st electric capacity one end is also connected with the 13rd electric capacity one end, described 13rd electric capacity other end ground connection, described 24th resistance one end is also connected with the 26th resistance one end, the described 26th resistance other end connects the 14th electric capacity one end, described 14th electric capacity other end ground connection, described 13rd electric capacity one end is also connected with the 5th amplifier anode and the 6th amplifier anode, described 5th amplifier negative pole connects the 5th amplifier out, described 6th amplifier negative pole connects the 6th amplifier out, described 5th amplifier out connects the 6th high tension silicon rectifier the 4th outfan, described 6th amplifier out connects the 7th high tension silicon rectifier the 4th outfan。
Technique scheme have the beneficial effect that reference signal initialization circuit arranges reference signal value, be transferred in circuit of sampling input, it is provided that reference signal value, be used for comparing output voltage and be transferred to central processing unit。
Described power monitoring circuit protection device; preferably; described frequency conversion process circuit also includes: the 15th resistance, the 16th resistance, the 17th resistance, the 18th resistance, the 29th resistance, the 27th resistance, the 30th resistance, the 11st diode, the 12nd diode, the 15th electric capacity, the first amplifier, the second amplifier, the 3rd amplifier
4th amplifier out connects the 15th resistance one end, the described 15th resistance other end connects the second amplifier anode and the 16th resistance one end respectively, described second amplifier negative pole connects the second amplifier out, described second amplifier out connects the 29th resistance one end, the described 29th resistance other end connects the 11st diode cathode respectively, 12nd diode cathode and the 15th electric capacity one end, described 11st diode cathode, after 12nd diode cathode and the 15th electric capacity other end connect, connect the first amplifier negative pole again, described first amplifier anode connects the 15th electric capacity one end, described first amplifier out connects the 30th resistance one end, the described 30th resistance other end connects power supply, described first amplifier out is also connected with central processing unit, described 11st diode cathode, after 12nd diode cathode and the 15th electric capacity other end connect, it is also connected with the 27th resistance one end, the described 27th resistance other end connects the 3rd amplifier out, described 3rd amplifier out is also connected with the 3rd amplifier negative pole, one end after described 3rd amplifier anode connection the 17th resistance and the 18th resistor coupled in parallel, described 17th resistance connects the 14th amplifier out。
Technique scheme have the beneficial effect that frequency conversion process circuit design circuit location wiring is reasonable, carrying out frequency processing can separate with clock frequency。
Described power monitoring circuit protection device; preferably; described frequency conversion process circuit also includes: the 7th amplifier, the 8th amplifier, the 9th amplifier, the 21st resistance, the 22nd resistance, the 28th resistance, the 13rd diode, the 14th diode, the 8th electric capacity
14th amplifier out connects the 8th amplifier anode, described 8th amplifier negative pole connects the 8th amplifier out, described 8th amplifier out is also connected with the 22nd resistance one end, the 22nd resistance other end connects the 13rd diode cathode, described 13rd diode cathode connects the 21st resistance one end and the 14th diode cathode respectively, described 14th diode cathode connects the 13rd diode cathode and the 8th electric capacity one end, the described 8th electric capacity other end connects the 14th diode cathode and the 7th amplifier negative pole, described 8th electric capacity one end is also connected with the 7th amplifier anode, described 7th amplifier out connects the 28th resistance one end, the described 28th resistance other end connects power supply, the 21st resistance other end connects the 9th amplifier out, described 9th amplifier out is also connected with the 9th amplifier negative pole。
Technique scheme have the beneficial effect that frequency conversion process circuit design circuit location wiring is reasonable, carrying out frequency processing can separate with clock frequency。
As shown in Figure 8, described power monitoring circuit protection device, it is preferred that also including power circuit, described power circuit output end connects central processing unit energization input；
Described power circuit includes: the first manostat, the second inductance, the 20th resistance, the 19th electric capacity, the 9th electric capacity,
Power end connects the first manostat input, described first output end of voltage stabilizer connects second inductance one end, the described second inductance other end connects the 20th resistance one end, the described 20th resistance other end connects the 19th electric capacity one end and the 9th electric capacity one end, the described 20th resistance other end is also connected with central processing unit energization input, the described 19th electric capacity other end and the 9th electric capacity other end ground connection。
Technique scheme have the beneficial effect that power-supplying circuit provide central processing unit stable power supply output, circuit design is reasonable。
As shown in Figure 9, described power monitoring circuit protection device, preferably, also include anti-jump loop, described anti-jump loop is connected with relay, described anti-jump loop includes: the first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, 6th resistance, 7th resistance, 8th resistance, 9th resistance, tenth resistance, first relay, second relay, first diode, second diode, 3rd diode, 4th diode, 5th diode, 6th diode, 7th diode, 8th diode, 9th diode, tenth diode, first electric capacity, second electric capacity,
First relay normally open contact connects first resistance one end, the described first resistance other end connects second resistance one end, the second resistance other end connects the 3rd resistance one end, the described 3rd resistance other end connects the 4th resistance one end, the described 4th resistance other end connects the 9th resistance one end, the described 9th resistance other end connects the 4th diode cathode and the 6th diode cathode, the 4th resistance other end is also connected with the 3rd diode cathode and the 5th diode cathode, first relay normally-closed contact connects the first diode cathode and first electric capacity one end, described first diode cathode connects the first electric capacity other end, described first electric capacity one end is also connected with the 3rd diode cathode and the 4th diode cathode, described 5th diode cathode connects the 6th diode cathode, the described 9th resistance other end is also connected with the tenth resistance other end；
Second relay normally open contact connects the 5th resistance one end, the described 5th resistance other end connects the 6th resistance one end, the described 6th resistance other end connects the 7th resistance one end, the described 7th resistance other end connects the 8th resistance one end, the described 8th resistance other end connects the tenth resistance one end, the described tenth resistance other end connects the 8th diode cathode and the tenth diode cathode, described second relay normally-closed contact connects the second diode cathode and second electric capacity one end, described second diode cathode connects the second electric capacity other end, described second electric capacity one end is also connected with the 7th diode cathode and the 8th diode cathode, described 7th diode cathode connects the tenth resistance one end and the 9th diode cathode respectively, described 9th diode cathode connects the tenth diode cathode, described 8th diode cathode connects the tenth diode cathode, described 8th diode cathode is also connected with the tenth resistance other end。
Technique scheme have the beneficial effect that above-mentioned anti-jump loop AC/DC universal; adapt to different running environment; adaptable; prevent because the combined floodgate contact controlling switch fails to return in time; and combined floodgate causes chopper to close continuously on faulty line and cuts; prevent from, because the chopper auxiliary node of trip(ping) circuit adjusts improper or conjugates slow, causing protection contact elder generation current interruption to burn simultaneously。
As shown in figs. 10-12, invention additionally discloses a kind of power monitoring circuit guard method, it is it is critical that comprise the steps:
Step 1, when taking current protection state, current-mode analog quantity sample circuit and voltage analog sample circuit start to gather data, the data of storage chip storage are resolved by CPU with the data of frequency conversion process circuit collection, warning alert is carried out by central processing unit by alarm module when current signal is more than current ration, on screen, show information warning simultaneously, output control is carried out by relay, if detection is not greater than current ration, return and again carry out cpu signal parsing, when voltage signal receives and presses off lock signal again, information warning is sent by central processing unit, reported to the police by alarm module, screen shows information warning simultaneously, output control is carried out by relay, lock signal is pressed off again if do not received, return and again carry out cpu signal parsing；
Step 2, when taking under-voltage protection state, current-mode analog quantity sample circuit and voltage analog sample circuit start to gather data, the data of storage chip storage are resolved by CPU with the data of frequency conversion process circuit collection, warning alert is carried out by central processing unit by alarm module when voltage signal is more than voltage definite value, on screen, show information warning simultaneously, output control is carried out by relay, if detection is not greater than voltage definite value, return and again carry out cpu signal parsing, when on-off model receives and opens into conjunction position signal, information warning is sent by central processing unit, reported to the police by alarm module, screen shows information warning simultaneously, output control is carried out by relay, open into conjunction position signal if do not received, return and again carry out cpu signal parsing；
Step 3, when taking reclosing guard mode, current-mode analog quantity sample circuit and voltage analog sample circuit start to gather data, the data of storage chip storage are resolved by CPU with the data of frequency conversion process circuit collection, warning alert is carried out by central processing unit by alarm module when current signal is more than current ration, on screen, show information warning simultaneously, output control is carried out by relay, if detection is not greater than current ration, return and again carry out cpu signal parsing, when voltage signal receives and presses off lock signal again, information warning is sent by central processing unit, reported to the police by alarm module, screen shows information warning simultaneously, output control is carried out by relay, lock signal is pressed off again if do not received, return and again carry out cpu signal parsing；When on-off model receives and opens into conjunction position signal, central processing unit send information warning, reported to the police by alarm module, screen shows information warning simultaneously, carry out output control by relay, opening into conjunction position signal if do not received, returning and again carrying out cpu signal parsing。
Technique scheme have the beneficial effect that by said method can monitor in real time power circuit, run safety and stability。
Communication chip adopts MAX485E；
Described alarm module is LED display；
First manostat is preferably LM1117；
The preferred model of described amplifier is MCP6002T；
The preferred model of central processing unit is LPC1768。
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means in conjunction with this embodiment or example describe are contained at least one embodiment or the example of the present invention。In this manual, the schematic representation of above-mentioned term is not necessarily referring to identical embodiment or example。And, the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiments or example。
Although an embodiment of the present invention has been shown and described, it will be understood by those skilled in the art that: these embodiments can being carried out multiple change, amendment, replacement and modification when without departing from principles of the invention and objective, the scope of the present invention is limited by claim and equivalent thereof。
Claims (9)
1. a power monitoring circuit protection device, it is characterised in that including: switching value input circuit, simulated measurement input circuit, switching value output circuit, alarm module, central processing unit,
Switching value input circuit signal output part connects central processing unit on-off model input, described central processing unit on-off model outfan connecting valve amount output circuit signal input part, simulated measurement input circuit connects central processing unit analog digital conversion signal input part by analog to digital conversion circuit, and described central processing unit display signal output part connects alarm module；
Described simulated measurement input circuit includes: circuit of sampling input, reference signal initialization circuit, frequency conversion process circuit,
Circuit of sampling input frequency variation signal outfan rate of connections conversion process circuit signal input, described frequency conversion process circuit signal outfan connects central processing unit analog digital conversion signal input part, reference signal initialization circuit reference voltage output terminal connects circuit of sampling input reference voltage input terminal, described reference signal initialization circuit reference signal outfan rate of connections conversion process circuit reference signal input part；
Described circuit of sampling input includes: the 14th resistance, the 19th resistance, the 4th amplifier, the 6th high tension silicon rectifier,
Electric power signal analog quantity first input end connects the 14th resistance one end, the described 14th resistance other end connects the 6th high tension silicon rectifier first input end, electric power signal analog quantity the second input connects the 6th high tension silicon rectifier the second input, described 6th high tension silicon rectifier the 3rd outfan connects the 19th resistance one end, the described 19th resistance other end connects the 6th high tension silicon rectifier the 4th outfan, described 19th resistance one end is also connected with the 4th amplifier anode, described 4th amplifier minus earth。
2. power monitoring circuit according to claim 1 protection device, it is characterised in that described switching value input circuit includes: the 11st resistance, the 12nd resistance, the 13rd resistance, the 16th diode, the first photoelectric coupled circuit,
On-off circuit one end connects the 11st resistance one end, the described 11st resistance other end connects the 12nd resistance one end, the described 12nd resistance other end connects the first photoelectric coupled circuit first input end, described first photoelectric coupled circuit the 3rd input connects the 16th diode cathode, described 16th diode cathode is also connected with power supply, described 16th diode cathode connects the 12nd resistance other end, described first photoelectric coupled circuit the 6th outfan connects power supply, and described first photoelectric coupled circuit the 4th outfan connects central processing unit signal input part。
3. power monitoring circuit according to claim 1 protection device, it is characterised in that described switching value output circuit includes: the 41st resistance, the second photoelectric coupled circuit, relay,
41st resistance one end connects central processing unit switching value output signal end, the described 41st resistance other end connects the second photoelectric coupled circuit first input end, described second photoelectric coupled circuit the 3rd input connects ground, and described second photoelectric coupled circuit the 6th outfan connects relay normally-closed contact。
4. power monitoring circuit according to claim 1 protection device, it is characterised in that described circuit of sampling input also includes: the 34th resistance, the 39th resistance, the 14th amplifier, the 7th high tension silicon rectifier,
Electric power signal analog quantity first input end connects the 34th resistance one end, the described 34th resistance other end connects the 7th high tension silicon rectifier first input end, electric power signal analog quantity the second input connects the 7th high tension silicon rectifier the second input, described 7th high tension silicon rectifier the 3rd outfan connects the 39th resistance one end, the described 39th resistance other end connects the 7th high tension silicon rectifier the 4th outfan, described 39th resistance one end is also connected with the 14th amplifier anode, described 14th amplifier minus earth。
5. power monitoring circuit according to claim 1 protection device; it is characterized in that; described reference signal initialization circuit includes: the 23rd resistance, the 24th resistance, the 25th resistance, the 26th resistance, the 15th diode, the 5th electric capacity, the 11st electric capacity, the 13rd electric capacity, the 14th electric capacity, the 5th amplifier, the 6th amplifier
Power end connects the 23rd resistance one end, the described 23rd resistance other end connects the 15th diode cathode, described 15th diode cathode ground connection, the described 23rd resistance other end is also connected with the 5th electric capacity one end, the described 5th electric capacity other end connects the 25th resistance one end and ground connection, the described 25th resistance other end connects the 24th resistance one end, the described 24th resistance other end connects the 5th electric capacity one end, described 24th resistance one end is also connected with the 11st electric capacity one end, described 11st electric capacity other end ground connection, described 11st electric capacity one end is also connected with the 13rd electric capacity one end, described 13rd electric capacity other end ground connection, described 24th resistance one end is also connected with the 26th resistance one end, the described 26th resistance other end connects the 14th electric capacity one end, described 14th electric capacity other end ground connection, described 13rd electric capacity one end is also connected with the 5th amplifier anode and the 6th amplifier anode, described 5th amplifier negative pole connects the 5th amplifier out, described 6th amplifier negative pole connects the 6th amplifier out, described 5th amplifier out connects the 6th high tension silicon rectifier the 4th outfan, described 6th amplifier out connects the 7th high tension silicon rectifier the 4th outfan。
6. power monitoring circuit according to claim 1 protection device; it is characterized in that; described frequency conversion process circuit also includes: the 15th resistance, the 16th resistance, the 17th resistance, the 18th resistance, the 29th resistance, the 27th resistance, the 30th resistance, the 11st diode, the 12nd diode, the 15th electric capacity, the first amplifier, the second amplifier, the 3rd amplifier
4th amplifier out connects the 15th resistance one end, the described 15th resistance other end connects the second amplifier anode and the 16th resistance one end respectively, described second amplifier negative pole connects the second amplifier out, described second amplifier out connects the 29th resistance one end, the described 29th resistance other end connects the 11st diode cathode respectively, 12nd diode cathode and the 15th electric capacity one end, described 11st diode cathode, after 12nd diode cathode and the 15th electric capacity other end connect, connect the first amplifier negative pole again, described first amplifier anode connects the 15th electric capacity one end, described first amplifier out connects the 30th resistance one end, the described 30th resistance other end connects power supply, described first amplifier out is also connected with central processing unit, described 11st diode cathode, after 12nd diode cathode and the 15th electric capacity other end connect, it is also connected with the 27th resistance one end, the described 27th resistance other end connects the 3rd amplifier out, described 3rd amplifier out is also connected with the 3rd amplifier negative pole, one end after described 3rd amplifier anode connection the 17th resistance and the 18th resistor coupled in parallel, described 17th resistance connects the 14th amplifier out。
7. power monitoring circuit according to claim 1 protection device; it is characterized in that; described frequency conversion process circuit also includes: the 7th amplifier, the 8th amplifier, the 9th amplifier, the 21st resistance, the 22nd resistance, the 28th resistance, the 13rd diode, the 14th diode, the 8th electric capacity
14th amplifier out connects the 8th amplifier anode, described 8th amplifier negative pole connects the 8th amplifier out, described 8th amplifier out is also connected with the 22nd resistance one end, the 22nd resistance other end connects the 13rd diode cathode, described 13rd diode cathode connects the 21st resistance one end and the 14th diode cathode respectively, described 14th diode cathode connects the 13rd diode cathode and the 8th electric capacity one end, the described 8th electric capacity other end connects the 14th diode cathode and the 7th amplifier negative pole, described 8th electric capacity one end is also connected with the 7th amplifier anode, described 7th amplifier out connects the 28th resistance one end, the described 28th resistance other end connects power supply, the 21st resistance other end connects the 9th amplifier out, described 9th amplifier out is also connected with the 9th amplifier negative pole。
8. power monitoring circuit according to claim 2 protection device, it is characterized in that, also include anti-jump loop, described anti-jump loop is connected with relay, described anti-jump loop includes: the first resistance, second resistance, 3rd resistance, 4th resistance, 5th resistance, 6th resistance, 7th resistance, 8th resistance, 9th resistance, tenth resistance, first relay, second relay, first diode, second diode, 3rd diode, 4th diode, 5th diode, 6th diode, 7th diode, 8th diode, 9th diode, tenth diode, first electric capacity, second electric capacity,
First relay normally open contact connects first resistance one end, the described first resistance other end connects second resistance one end, the second resistance other end connects the 3rd resistance one end, the described 3rd resistance other end connects the 4th resistance one end, the described 4th resistance other end connects the 9th resistance one end, the described 9th resistance other end connects the 4th diode cathode and the 6th diode cathode, the 4th resistance other end is also connected with the 3rd diode cathode and the 5th diode cathode, first relay normally-closed contact connects the first diode cathode and first electric capacity one end, described first diode cathode connects the first electric capacity other end, described first electric capacity one end is also connected with the 3rd diode cathode and the 4th diode cathode, described 5th diode cathode connects the 6th diode cathode, the described 9th resistance other end is also connected with the tenth resistance other end；
Second relay normally open contact connects the 5th resistance one end, the described 5th resistance other end connects the 6th resistance one end, the described 6th resistance other end connects the 7th resistance one end, the described 7th resistance other end connects the 8th resistance one end, the described 8th resistance other end connects the tenth resistance one end, the described tenth resistance other end connects the 8th diode cathode and the tenth diode cathode, described second relay normally-closed contact connects the second diode cathode and second electric capacity one end, described second diode cathode connects the second electric capacity other end, described second electric capacity one end is also connected with the 7th diode cathode and the 8th diode cathode, described 7th diode cathode connects the tenth resistance one end and the 9th diode cathode respectively, described 9th diode cathode connects the tenth diode cathode, described 8th diode cathode connects the tenth diode cathode, described 8th diode cathode is also connected with the tenth resistance other end。
9. a power monitoring circuit guard method, it is characterised in that comprise the steps:
Step 1, when taking current protection state, current-mode analog quantity sample circuit and voltage analog sample circuit start to gather data, the data of storage chip storage are resolved by CPU with the data of frequency conversion process circuit collection, warning alert is carried out by central processing unit by alarm module when current signal is more than current ration, on screen, show information warning simultaneously, output control is carried out by relay, if detection is not greater than current ration, return and again carry out cpu signal parsing, when voltage signal receives and presses off lock signal again, information warning is sent by central processing unit, reported to the police by alarm module, screen shows information warning simultaneously, output control is carried out by relay, lock signal is pressed off again if do not received, return and again carry out cpu signal parsing；
Step 2, when taking under-voltage protection state, current-mode analog quantity sample circuit and voltage analog sample circuit start to gather data, the data of storage chip storage are resolved by CPU with the data of frequency conversion process circuit collection, warning alert is carried out by central processing unit by alarm module when voltage signal is more than voltage definite value, on screen, show information warning simultaneously, output control is carried out by relay, if detection is not greater than voltage definite value, return and again carry out cpu signal parsing, when on-off model receives and opens into conjunction position signal, information warning is sent by central processing unit, reported to the police by alarm module, screen shows information warning simultaneously, output control is carried out by relay, open into conjunction position signal if do not received, return and again carry out cpu signal parsing；
Step 3, when taking reclosing guard mode, current-mode analog quantity sample circuit and voltage analog sample circuit start to gather data, the data of storage chip storage are resolved by CPU with the data of frequency conversion process circuit collection, warning alert is carried out by central processing unit by alarm module when current signal is more than current ration, on screen, show information warning simultaneously, output control is carried out by relay, if detection is not greater than current ration, return and again carry out cpu signal parsing, when voltage signal receives and presses off lock signal again, information warning is sent by central processing unit, reported to the police by alarm module, screen shows information warning simultaneously, output control is carried out by relay, lock signal is pressed off again if do not received, return and again carry out cpu signal parsing；When on-off model receives and opens into conjunction position signal, central processing unit send information warning, reported to the police by alarm module, screen shows information warning simultaneously, carry out output control by relay, opening into conjunction position signal if do not received, returning and again carrying out cpu signal parsing。
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