CN106772006A - A kind of circuit and its diagnostic method of automatic diagnosis manual pull station failure - Google Patents
A kind of circuit and its diagnostic method of automatic diagnosis manual pull station failure Download PDFInfo
- Publication number
- CN106772006A CN106772006A CN201611146027.7A CN201611146027A CN106772006A CN 106772006 A CN106772006 A CN 106772006A CN 201611146027 A CN201611146027 A CN 201611146027A CN 106772006 A CN106772006 A CN 106772006A
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- China
- Prior art keywords
- button switch
- divider resistance
- chip microcomputer
- values
- circuit
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
Abstract
The invention discloses a kind of circuit of automatic diagnosis manual pull station failure, including button switch K 1, also including single-chip microcomputer, divider resistance R17 and divider resistance R20；The single-chip microcomputer, divider resistance R17, button switch K 1 are sequentially connected in series to form loop, and button switch K 1 is normally off, and fire alarm is realized when disconnecting manually；Described divider resistance R20 one end is accessed loop and is located at after button switch K 1, other end ground connection.The present invention still further there is provided the diagnostic method of the circuit of the automatic diagnosis manual pull station failure.The present invention diagnoses manual pull station on off state using automatic data collection level signal and AD conversions mode, can in time find that button is aging, prompt the user with, make user in time to be changed according to the problem of aging of button or do other to process, the problem for avoiding manual push button switch from operationally breaking down (report by mistake or do not alarm), improves the security of warning system.
Description
Technical field
The present invention relates to technical field of fire control, and in particular to be a kind of circuit of automatic diagnosis manual pull station failure
And its diagnostic method.
Background technology
Manual pull station is an equipment in fire alarm control system, when personnel have found fire, is visited in fire
When survey device does not detect fire, personnel are manually pressed by manual pull station, can be with fast report fire signal.Therefore,
Manual pull station is type of alarm the most direct in fire alarm system, is also to carry out interim very first time notice fire in fire
The mode of calamity warning system.
At present, the button switch in manual pull station on the market is open in usual, fire alarm can be produced after closure and is adopted
Electricity consumption square formula carrys out the operating state of confirming button.However, (being given birth to because user can not judge whether manual pull station is aging
Rust), and switch problem of aging can not in time to user feedback, therefore, when button generation it is aging when, can there is problems with：
(1) switch contact is bad, normal work during influence closure, wrong report or the phenomenon do not alarmed easily occurs；
(2) practicality and security to fire alarm control system are impacted, and there is potential safety hazard.
Based on above mentioned problem, the state of exact knowledge manual pull station how is allowed users to, it is this area skill to become
One of technical problem underlying of art personnel's urgent need to resolve.
The content of the invention
For above-mentioned the deficiencies in the prior art, the invention provides a kind of circuit of automatic diagnosis manual pull station failure
And its diagnostic method, it can accurately judge that manual alarm is pressed using automatic data collection level signal and the mode that is AD converted
It is aging whether button occurs, and solves problem of the prior art.
To achieve the above object, the technical solution adopted by the present invention is as follows：
A kind of circuit of automatic diagnosis manual pull station failure, including button switch K 1, also including single-chip microcomputer, partial pressure electricity
Resistance R17 and divider resistance R20；The single-chip microcomputer, divider resistance R17, button switch K 1 are sequentially connected in series to form loop, and button is opened
Pass K1 is normally off, and fire alarm is realized when disconnecting manually；Access loop and opened positioned at button in described divider resistance R20 one end
Close after K1, the other end is grounded.
Further, present invention additionally comprises low pass filter, the low pass filter includes accessing loop and positioned at partial pressure electricity
Resistance R19 after resistance R20, and the electric capacity C8 that one end is connected with resistance R19, the other end is grounded.
Based on foregoing circuit structure, present invention also offers the diagnostic method of the circuit, comprise the following steps：
(1) in single-chip microcomputer pin output high level to loop, and the level signal at divider resistance R20 is obtained；
(2) level signal value of acquisition is scaled AD values by single-chip microcomputer, and mode according to step (3) judges button switch
Whether K1 is in ageing state, is, then cue button switch K1 breaks down；Otherwise perform step (4)；
(3) the AD values of conversion are compared with the scope of the ageing state AD values of default button switch K 1, if in this model
In enclosing, then count once, and continue to obtain the level signal at divider resistance R20, then proceed after AD values are scaled
Compare；When the number of times of continuous counter meets stipulated number and each comparative result is the AD values of conversion in button switch
When in the range of K1 ageing state AD values, then labeled as aging, cue button switch K1 failures；It is otherwise that counts are clear
Zero, and perform step (4)；
(4) single-chip microcomputer pin level, and repeat step (1)~(3) are dragged down.
Further, in the step (1), transmitted after the low-pass filtered device filtering of level signal at divider resistance R20
Into single-chip microcomputer.
Preferably, the level signal value of acquisition is scaled 8 AD values by the single-chip microcomputer.
Compared with prior art, the invention has the advantages that：
(1) major design that the present invention passes through single-chip microcomputer, divider resistance R17 and divider resistance R20, and make at button switch
Loop is formed in normally off, so as to whether be in using automatic data collection level signal, the mode real-time judge of AD conversion switch
Ageing state, and then corresponding prompting is shown, facilitate related personnel to safeguard or change switch in time, it is ensured that alarm button is just
Often work.
(2) present invention is also added into the design of low pass filter in the loop, by the filtering of low pass filter, can improve
The precision of AD samplings, further ensures that the accuracy of diagnosis.
(3) principle of the invention is simple, design ingenious, can more intuitively distinguish the real-time status of manual pull station, subtracts
The problem that few manual pull station breaks down (report by mistake or do not alarm) when working, greatly improves the security of warning system.
Brief description of the drawings
Fig. 1 is electrical block diagram of the invention.
Fig. 2 is that the present invention judges whether button switch is in the schematic flow sheet of ageing state.
Specific embodiment
The invention will be further described with embodiment for explanation below in conjunction with the accompanying drawings, and mode of the invention includes but not only limits
In following examples.
Whether there is failure present invention is mainly used for real-time diagnosis manual pull station switch, to point out related personnel real-time
Safeguard and change the manual pull station of aging (getting rusty).Circuit structure of the invention is as shown in figure 1, it includes being sequentially connected in series shape
Single-chip microcomputer, divider resistance R17, button switch K 1 (, button switch K 1 in the present invention different from existing design mode into loop
It is normally off, i.e., switch breaks the position to 3, will realizes that fire alarm, i.e. switch break the position to 1 when disconnecting manually), one
Loop is accessed and after button switch K 1, the divider resistance R20 of other end ground connection in one end, and in an access loop
Low pass filter.
Whether the present invention is broken down using level mode automatic decision button switch K 1, and its whole process for judging is such as
Under：
When initial, in single-chip microcomputer pin output high level to loop, and the level signal at divider resistance R20 is obtained, should
Transmitted into single-chip microcomputer after the low-pass filtered device filtering of level signal.Low pass filter in the present embodiment include accessing loop and
Resistance R19 after divider resistance R20, and the electric capacity C8 that one end is connected with resistance R19, the other end is grounded.
The level signal value of acquisition is scaled AD values by single-chip microcomputer, and judges that button switch K 1 is according to step following manner
It is no in ageing state：
With the scope of the ageing state AD values of default button switch K 1 be compared the AD values of conversion by single-chip microcomputer, if herein
In the range of, then count once, and continue to obtain the level signal at divider resistance R20, then continue after AD values are scaled into
Row compares；Single-chip microcomputer pin level is otherwise dragged down, and repeats above-mentioned diagnosis algorithm.
When the number of times of continuous counter meet stipulated number and each comparative result be conversion AD values opened in button
Close when in the range of K1 ageing state AD values, then labeled as aging, cue button switch K1 failures；Otherwise by counts
Reset, and drag down single-chip microcomputer pin level, then repeat above-mentioned diagnosis algorithm.Judge that the aging main flow of button switch K 1 can
As shown in Figure 2.And in the present embodiment, single-chip microcomputer pin exports the time for the low level time being longer than output high level, such one
Come, on the one hand can save electric energy, on the other hand can then reduce the switch oxidized time, its life-span is effectively prolonged
It is long.
The aging principle of present invention diagnosis button switch is that, when switch starts aging, it is equivalent to electricity in circuit
Hinder, and resistance can slowly increase with the intensification of degree of aging, while when resistance R17 is with R20 partial pressures, being obtained at R20
Level signal value will slowly reduce.Therefore, as long as the level signal value collected at resistance R20 diminishes, and its value is default
Aging value in the range of, so that it may judge button switch K 1 occur it is aging, it is necessary to safeguarded or replacing treatment.
Based on above-mentioned principle, by taking 8 bit AD samples as an example, if AD reference voltages are 3V, when input voltage full scale, one
Individual numeral is 3V/28=0.01171875V (sampling precision).If aging AD value models of the default button switch K 1 of single-chip microcomputer again
It is 100~200 (decimal systems) to enclose, then at divider resistance R20 certain level signal value once in 1.171875V~2.34375V
In the range of when, it is aging to be marked as alarm button, and counting is designated as once.
Result when continuous counter reaches stipulated number (such as three times) and each be it is aging labeled as alarm button,
Then by prompting that the controller display alarm button being connected with single-chip microcomputer is aging.If once count results are not for alarm is pressed
Button is aging (such as counting two times result, to be alarm button aging, but third time result is for alarm button is aging), then count
Reset, the aging prompting of not display alarm button is counted again.The purpose of so operation is to ensure circuit diagnostics as far as possible
The accuracy of button switch failure, it is to avoid wrong diagnosis occur.
The present invention diagnoses manual pull station on off state using automatic data collection level signal and AD conversions mode, can be in time
It was found that button is aging, prompt the user with, make user in time to be changed according to the problem of aging of button or do other and process, it is to avoid
The problem that manual push button switch operationally breaks down (report by mistake or do not alarm), improves the security of warning system.
Above-described embodiment is only one of the preferred embodiment of the present invention, should not be taken to limit protection model of the invention
Enclose, it is all body design thought of the invention and mentally make have no the change of essential meaning or polishing, what it was solved
Technical problem is still consistent with the present invention, should be included within protection scope of the present invention.
Claims (5)
1. a kind of circuit of automatic diagnosis manual pull station failure, including button switch K 1, it is characterised in that also including monolithic
Machine, divider resistance R17 and divider resistance R20；The single-chip microcomputer, divider resistance R17, button switch K 1 are sequentially connected in series to be formed back
Road, and button switch K 1 is normally off, and fire alarm is realized when disconnecting manually；Access loop in described divider resistance R20 one end
And after button switch K 1, other end ground connection.
2. the circuit of a kind of automatic diagnosis manual pull station failure according to claim 1, it is characterised in that also include
Low pass filter, the low pass filter include access loop and the resistance R19 after divider resistance R20, and one end with
Resistance R19 connections, the electric capacity C8 of other end ground connection.
3. the diagnostic method of the circuit described in claim 2, it is characterised in that comprise the following steps：
(1) in single-chip microcomputer pin output high level to loop, and the level signal at divider resistance R20 is obtained；
(2) level signal value of acquisition is scaled AD values by single-chip microcomputer, and mode according to step (3) judges that button switch K 1 is
It is no in ageing state, be, then cue button switch K1 break down；Otherwise perform step (4)；
(3) the AD values of conversion are compared with the scope of the ageing state AD values of default button switch K 1, if within this range,
Then count once, and continue to obtain the level signal at divider resistance R20, then continue to be compared after AD values are scaled；
When the number of times of continuous counter meet stipulated number and each comparative result be conversion AD values in button switch K 1 it is aging
When in the range of state AD values, then labeled as aging, cue button switch K1 failures；Otherwise counts are reset, and
Perform step (4)；
(4) single-chip microcomputer pin level, and repeat step (1)~(3) are dragged down.
4. the diagnostic method of circuit according to claim 3, it is characterised in that in the step (1), divider resistance R20
Transmitted into single-chip microcomputer after the low-pass filtered device filtering of level signal at place.
5. the diagnostic method of the circuit according to claim 3 or 4, it is characterised in that the level that the single-chip microcomputer will be obtained
Signal value is scaled 8 AD values.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611146027.7A CN106772006A (en) | 2016-12-13 | 2016-12-13 | A kind of circuit and its diagnostic method of automatic diagnosis manual pull station failure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611146027.7A CN106772006A (en) | 2016-12-13 | 2016-12-13 | A kind of circuit and its diagnostic method of automatic diagnosis manual pull station failure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106772006A true CN106772006A (en) | 2017-05-31 |
Family
ID=58876543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611146027.7A Pending CN106772006A (en) | 2016-12-13 | 2016-12-13 | A kind of circuit and its diagnostic method of automatic diagnosis manual pull station failure |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2583687Y (en) * | 2002-11-08 | 2003-10-29 | 薛辉 | High voltage switch contact monitoring device |
| CN102628925A (en) * | 2012-04-24 | 2012-08-08 | 杭州浙大桑尼能源科技有限公司 | Method and device for detecting faults of relays of photovoltaic inverter |
| CN202649420U (en) * | 2012-07-24 | 2013-01-02 | 威胜集团有限公司 | Circuit for detecting switch on/off state of relay |
| CN102866319A (en) * | 2012-09-27 | 2013-01-09 | 重庆华渝电气仪表总厂 | Fault diagnosis circuit based on AD convertor of single chip microcomputer |
| US20140191767A1 (en) * | 2013-01-08 | 2014-07-10 | Eaton Corporation | Detection and location of electrical connections having a micro-interface abnormality in an electrical system |
| CN105548867A (en) * | 2015-12-01 | 2016-05-04 | 天津市电力科技发展公司 | Diagnostic system and diagnostic method of contact state of high-voltage circuit breaker |
| CN105932732A (en) * | 2016-05-12 | 2016-09-07 | 国网山东省电力公司电力科学研究院 | Circuit breaker control circuit, and electric car charger operation control circuit and method |
-
2016
- 2016-12-13 CN CN201611146027.7A patent/CN106772006A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2583687Y (en) * | 2002-11-08 | 2003-10-29 | 薛辉 | High voltage switch contact monitoring device |
| CN102628925A (en) * | 2012-04-24 | 2012-08-08 | 杭州浙大桑尼能源科技有限公司 | Method and device for detecting faults of relays of photovoltaic inverter |
| CN202649420U (en) * | 2012-07-24 | 2013-01-02 | 威胜集团有限公司 | Circuit for detecting switch on/off state of relay |
| CN102866319A (en) * | 2012-09-27 | 2013-01-09 | 重庆华渝电气仪表总厂 | Fault diagnosis circuit based on AD convertor of single chip microcomputer |
| US20140191767A1 (en) * | 2013-01-08 | 2014-07-10 | Eaton Corporation | Detection and location of electrical connections having a micro-interface abnormality in an electrical system |
| CN105548867A (en) * | 2015-12-01 | 2016-05-04 | 天津市电力科技发展公司 | Diagnostic system and diagnostic method of contact state of high-voltage circuit breaker |
| CN105932732A (en) * | 2016-05-12 | 2016-09-07 | 国网山东省电力公司电力科学研究院 | Circuit breaker control circuit, and electric car charger operation control circuit and method |
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| SE01 | Entry into force of request for substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170531 |
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| RJ01 | Rejection of invention patent application after publication |