CN202586268U - Self fault discrimination pilot circuit system - Google Patents
Self fault discrimination pilot circuit system Download PDFInfo
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- CN202586268U CN202586268U CN2012201524477U CN201220152447U CN202586268U CN 202586268 U CN202586268 U CN 202586268U CN 2012201524477 U CN2012201524477 U CN 2012201524477U CN 201220152447 U CN201220152447 U CN 201220152447U CN 202586268 U CN202586268 U CN 202586268U
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Abstract
The utility model provides a self fault discrimination pilot circuit system comprising an intrinsic safety pilot circuit, a signal processing unit, a logic judgment and control unit, a display unit, and an execution unit. The intrinsic safety pilot circuit comprises a start button, a stop button, three resistors and four diodes. According to the intrinsic safety pilot circuit, one-way conduction of the diodes is utilized to form two electrical circuits of positive and negative half cycles of an alternating current power supply. The signal processing unit sends a sampling voltage signal to the logic judgment and control unit for processing, the display unit carries out displaying, and the control unit executes a relevant action. According to the utility model, voltage drop change of the positive and negative half cycles of alternating current generated on the resistors, normal switch on and switch off of electrical equipment, and circuit short circuit and open circuit faults are associated, and the self discrimination of a pilot circuit fault is effectively realized. A circuit structure is simple, reliability is high, cost is low, and the self fault discrimination pilot circuit system can be adapted to a coal mine underground complex working environment to achieve requirements of coal mine safety relevant provisions.
Description
Technical field
The utility model relates to the start and stop technology of intrinsicallysafe electrical apparatus, particularly relates to a kind of guide loop with self-fault distinguishing ability.
Background technology
In the complex environment under the coal mine, guide to the guide loop of master-control room from unit switch or other electric equipments and need consider its safety factor.Electric equipment should be distinguished with normally closed switch and cut-out switching manipulation because of the short circuit of guide loop, open circuit fault that accident causes mutually, and can analyze the identification failure mode, makes corresponding processing action.According to the complex environment under the coal mine; Country is that the guide loop is necessary for the essential safe type circuit to the regulation in guide loop; Existing guide loop or do not possess fault diagnosis functions; Possess fault diagnosis functions but huge because of Circuits System, the problem of bringing is peaceful property, the reduction of reliability and increasing of cost.
The utility model content
The purpose of the utility model is: solve the problem that exists in the prior art; Provide that a kind of circuit structure is simple, good reliability and guide loop with fault distinguishing function; This guide loop can adapt to complex environment under the coal mine preferably, and can reach the requirement of safety of coal mines relevant regulations.
The technical scheme that realizes the utility model purpose is: the self-fault distinguishing guide circuit system of the utility model comprises intrinsic safety guide loop, signal processing unit, logic determines control unit, display unit, performance element, and its design feature is: intrinsic safety guide loop has first ac power input end, second ac power input end and signal voltage output; Signal processing unit has signal voltage input, direct-current coupling voltage input end and signal output part; The logic determines control unit has signal input part, control signal output ends and shows signal output; Display unit has the shows signal input; Performance element has signal input end and dc power supply terminal; When using, first ac power input end in intrinsic safety guide loop and second ac power input end be electrically connected with external AC power; The signal voltage input of signal processing unit is electrically connected with the signal voltage output in intrinsic safety guide loop, is electrically connected with external DC power supply VDD when the direct-current coupling voltage input end of signal processing unit uses; The signal input part of logic determines control unit is electrically connected with the signal output part of signal processing unit, and the shows signal input of display unit is electrically connected with the shows signal output of logic determines control unit; The signal input end of performance element is electrically connected with the control signal output ends of logic determines control unit; When using, the dc power supply terminal of performance element is electrically connected with external DC power supply VCC.
Further scheme is: aforesaid intrinsic safety guide loop comprises circuit L, start button S1, stop button S2, resistance R 1, resistance R 2, resistance R 3, diode D1, diode D2, diode D3, diode D4; The common junction of the negative pole of the positive pole of described diode D1 and diode D2 is first ac power input end in described intrinsic safety guide loop; The negative pole of diode D1 is electrically connected with an end of resistance R 1, and the other end of resistance R 1 is electrically connected with the terminals of stop button S2; The moving contact conllinear of the switch relay K of another terminals of stop button S2, the end of start button S1 and described performance element 5; The switch relay K of the anodal and described performance element of the negative pole of the positive pole of the other end of start button S1 and diode D2, diode D3, diode D4 often opens the fixed contact conllinear; The positive pole of diode D3 is electrically connected with an end of resistance R 3; One end of the other end of resistance R 3, resistance R 2 and the negative electricity of diode D4 are connected to form common junction, and this common junction is the signal voltage output in described intrinsic safety guide loop; The other end of resistance R 2 is second ac power input end in described intrinsic safety guide loop;
Aforesaid signal processing unit comprises resistance R 4, resistance R 5 and operational amplifier T; One end of resistance R 4 is the signal voltage input of described signal processing unit; One end of the other end of resistance R 4, resistance R 5 and the inverting input conllinear of operational amplifier T; The normal phase input end of operational amplifier T is the direct-current coupling voltage input end of described signal processing unit; The other end of resistance R 5 is electrically connected with the output of operational amplifier T and forms common junction, and this common junction is the signal voltage output of described signal processing unit;
Aforesaid logic determines control unit comprises the single-chip microcomputer superior processor; Single-chip microcomputer has signal input part, and superior processor has signal output part; Superior processor is electrically connected with single-chip microcomputer, and the signal input part of single-chip microcomputer is the signal input part of described logic determines control unit; The signal output part of superior processor is the shows signal output of described logic determines control unit;
Aforesaid display unit comprises display screen, and described display screen has signal input part, and this signal input part is the shows signal input of described display unit;
Aforesaid performance element comprises switch relay K, resistance R 6, resistance R 7, triode VT and diode D5; One end of resistance R 6 is the signal input end of described performance element; One end of the other end of resistance R 6, resistance R 7 and the base stage conllinear of triode VT; The emitter grounding of the other end of the 7th resistance R 7 and triode VT; A terminals conllinear of the positive pole of the collector electrode of triode VT, diode D5 and the coil of relay K; Another terminals of the negative pole of diode D5 and relay K coil are electrically connected and form common junction, and this common junction is the dc power supply terminal of described performance element; The fixed contact of often opening of switch relay K is electrically connected with the end of the start button S1 in described intrinsic safety guide loop, and the moving contact of switch relay K is electrically connected with the other end of start button S1.
Further scheme is: the resistance value of aforesaid resistance R 1 and resistance R 3 equates; The resistance value of resistance R 4 and resistance R 5 equates.
The utlity model has positive effect: (1) utilizes the unidirectional conduction of diode; Design two electric loops; With the positive-negative half-cycle of alternating current respectively conduction resistance formerly go up the change in pressure drop that produces and electric equipment normal combined floodgate, open a sluice gate and line short and open circuit fault interrelate, effectively realize guide's loop fault oneself differentiation.(2) circuit structure is simple, good reliability, and cost is low.(3) can adapt to the colliery preferably and advance complex work environment down, and accomplish the requirement that reaches the safety of coal mines relevant regulations.
Description of drawings
Fig. 1 is the circuit block diagram of the self-fault distinguishing guide circuit system of the utility model;
Fig. 2 is the electrical schematic diagram of self-fault distinguishing guide circuit system shown in Figure 1;
Fig. 3 carries out the FB(flow block) of fault distinguishing method for self-fault distinguishing guide circuit system shown in Figure 1.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is done further detailed explanation:
(embodiment 1)
See Fig. 1, the self-fault distinguishing guide circuit system of present embodiment comprises intrinsic safety guide loop 1, signal processing unit 2, logic determines control unit 3, display unit 4, performance element 5.
Intrinsic safety guide loop 1 has first ac power input end, second ac power input end and signal voltage output; When using, first ac power input end and second ac power input end be electrically connected with external AC power U.Signal processing unit 2 has signal voltage input, direct-current coupling voltage input end and signal output part; Logic determines control unit 3 has signal input part, control signal output ends and shows signal output; Display unit 4 has the shows signal input; Performance element 5 contains signal input end, dc power supply terminal and switch relay K.
The signal voltage input of signal processing unit 2 is electrically connected with the signal voltage output in intrinsic safety guide loop 1, is electrically connected with external DC power supply VDD when the direct-current coupling voltage input end of signal processing unit 2 uses; The signal input part of logic determines control unit 3 is electrically connected with the signal output part of signal processing unit 2; The shows signal input of display unit 4 is electrically connected with the shows signal output of logic determines control unit 3; The signal input end of performance element 5 is electrically connected with the control signal output ends of logic determines control unit 3; When using, the dc power supply terminal of performance element 5 is electrically connected with external DC power supply VCC.
See Fig. 2, intrinsic safety guide loop 1 comprises circuit L, start button S1, stop button S2, resistance R 1, resistance R 2, resistance R 3, diode D1, diode D2, diode D3, diode D4; The common junction of the negative pole of the positive pole of diode D1 and diode D2 is first ac power input end in intrinsic safety guide loop 1; The negative pole of diode D1 is electrically connected with an end of resistance R 1, and the other end of resistance R 1 is electrically connected with the terminals of stop button S2; The moving contact conllinear of the switch relay K of another terminals of stop button S2, the end of start button S1 and performance element 5; The anodal conllinear of the negative pole of the positive pole of the other end of start button S1 and diode D2, diode D3, diode D4; The positive pole of diode D3 is electrically connected with an end of resistance R 3; One end of the other end of resistance R 3, resistance R 2 and the negative electricity of diode D4 are connected to form common junction, and this common junction is the signal voltage output in intrinsic safety guide loop 1; The other end of resistance R 2 is second ac power input end in intrinsic safety guide loop 1; Diode D1, resistance R 1, diode D4, resistance R 2 and circuit L constitute the positive half cycle power circuit of interchange in intrinsic safety guide loop 1; Resistance R 2, resistance R 3, diode D3, diode D2 and circuit L constitute the interchange negative half period power circuit in intrinsic safety guide loop 1;
Logic determines control unit 3 comprises single-chip microcomputer and the superior processor that is electrically connected with single-chip microcomputer; The promptly common alleged PLC controller of superior processor; Single-chip microcomputer has signal input part, and the signal input part of single-chip microcomputer is the signal input part of logic determines control unit 3; The output of superior processor PLC is the shows signal output of logic determines control unit 3; In the present embodiment, the model that the preferred Microchip Technology of single-chip microcomputer (Microchip) produces is the single-chip microcomputer of PIC18F25K80.The model that the preferred Mitsubishi Electric of PLC controller automation (Shanghai) Co., Ltd. produces is a FX2N series of PLC controller.
Display unit 4 comprises display screen, and display screen has signal input part, and this signal input part is the shows signal input of display unit 4;
Performance element 5 comprises switch relay K, resistance R 6, resistance R 7, triode VT and diode D5; One end of resistance R 6 is the signal input end of performance element 5; One end of the other end of resistance R 6, resistance R 7 and the base stage conllinear of triode VT; The emitter grounding of the other end of the 7th resistance R 7 and triode VT; A terminals conllinear of the positive pole of the collector electrode of triode VT, diode D5 and the coil of relay K; Another terminals of the negative pole of diode D5 and relay K coil are electrically connected and form common junction, and this common junction is the dc power supply terminal of performance element 5.The fixed contact of often opening of switch relay K is electrically connected with the end of start button S1, and the moving contact of switch relay K is electrically connected with the other end of start button S1.
In the present embodiment, the resistance value of resistance R 1 and resistance R 3 equates; The resistance value of resistance R 4 and resistance R 5 equates.
See Fig. 3, the self-fault distinguishing guide circuit system method of work of present embodiment is also promptly differentiated the method for fault, and the difference of the voltage when being based on external AC power U and being in positive-negative half-cycle on the resistance R 2 judges that operation principle is:
When start button S1 pressed, the positive half cycle voltage U 1 at resistance R 2 two ends was
; The negative half period voltage U 2 at resistance R 2 two ends is
;
When stop button S2 presses; The positive half cycle of AC power U does not have the loop; The positive half cycle voltage U 1 at resistance R 2 two ends is
, and the negative half period voltage U 2 at resistance R 2 two ends is
;
When said circuit L is short-circuited; The positive half cycle voltage U 1 at resistance R 2 two ends is
, and the negative half period voltage U 2 at resistance R 2 two ends is
;
When circuit L opens circuit; The positive half cycle of AC power U does not have the loop; The positive half cycle voltage U 1 at resistance R 2 two ends is
; AC power U negative half period does not have the loop, and the negative half period voltage U 2 at resistance R 2 two ends is
.
Concrete circuit conditions determination methods step comprises:
The first step: press start button S1, obtain AC signal from resistance R 2 and among operational amplifier T, be coupled with external direct-current coupling voltage VDD;
Second step: single-chip microcomputer receives the voltage signal after being coupled by pre-set programs and reduces, and presses following analyze case judgment processing:
1. when external AC power U is in positive half cycle, the voltage U 1=0 on the resistance R 2, when external AC power U is in negative half period, the voltage U 2=0 on the resistance R 2, judgment task state are to open circuit in intrinsic safety guide loop 1, the output signal is to display unit 4 warnings;
2. when external AC power U was in positive half cycle, the voltage U 1 ≠ 0 on the resistance R 2 was when external AC power U is in negative half period; Voltage U 2 ≠ 0 on the resistance R 2; And U1 ≠ U2, judgment task state are 1 short circuit of intrinsic safety guide loop, and the output signal is reported to the police to display unit 4;
3. when external AC power U is in positive half cycle and negative half period; Positive half cycle voltage U 1=negative half period voltage U 2 on the resistance R 2, and U1 ≠ 0, U2 ≠ 0; The judgment task state is the intrinsic safety guide loop 1 normal fault-free that is communicated with; The output signal is normal to display unit 4 display working conditions, exports signal simultaneously to performance element 5, often opens fixed contact K1 closure locking start button S1 through relay K;
4. when external AC power U is in positive half cycle, the voltage U 1=0 on the resistance R 2, when external AC power U is in negative half period, the voltage U 2 ≠ 0 on the resistance R 2, the judgment task state is the intrinsic safety guide loop 1 normal fault-free of breaking off.The output signal is normal to display unit 4 display working conditions.
Above embodiment is the explanation to the embodiment of the utility model; But not to the restriction of the utility model; The technical staff in relevant technologies field is under the situation of spirit that does not break away from the utility model and scope; Can also make various conversion and variation and obtain the corresponding technical scheme that is equal to, so all technical schemes that are equal to all should be included into the scope of patent protection of the utility model.
Claims (3)
1. self-fault distinguishing guide circuit system; Comprise intrinsic safety guide loop (1), signal processing unit (2), logic determines control unit (3), display unit (4), performance element (5), it is characterized in that: described intrinsic safety guide loop (1) has first ac power input end, second ac power input end and signal voltage output; Described signal processing unit (2) has signal voltage input, direct-current coupling voltage input end and signal output part; Described logic determines control unit (3) has signal input part, control signal output ends and shows signal output; Described display unit (4) has the shows signal input; Described performance element (5) has signal input end and dc power supply terminal; First ac power input end in described intrinsic safety guide loop (1) and second ac power input end all are electrically connected with external AC power (U) when using; The signal voltage input of signal processing unit (2) is electrically connected with the signal voltage output in intrinsic safety guide loop (1), is electrically connected with external DC power supply (VDD) when the direct-current coupling voltage input end of signal processing unit (2) uses; The signal input part of logic determines control unit (3) is electrically connected with the signal output part of signal processing unit (2); The shows signal input of display unit (4) is electrically connected with the shows signal output of logic determines control unit (3); The signal input end of performance element (5) is electrically connected with the control signal output ends of logic determines control unit (3); When using, the dc power supply terminal of performance element (5) is electrically connected with external DC power supply (VCC).
2. self-fault distinguishing guide circuit system according to claim 1 is characterized in that: described intrinsic safety guide loop (1) comprises circuit (L), start button (S1), stop button (S2), resistance (R1), resistance (R2), resistance (R3), diode (D1), diode (D2), diode (D3), diode (D4); The common junction of the negative pole of the positive pole of described diode (D1) and diode (D2) is first ac power input end in described intrinsic safety guide loop (1); The negative pole of diode (D1) is electrically connected with an end of resistance (R1), and the other end of resistance (R1) is electrically connected with terminals of stop button (S2); The moving contact conllinear of the switch relay (K) of one end of another terminals of stop button (S2), start button (S1) and described performance element (5); The switch relay (K) of the anodal and described performance element (5) of the negative pole of the positive pole of the other end of start button (S1) and diode (D2), diode (D3), diode (D4) often open the fixed contact conllinear; The positive pole of diode (D3) is electrically connected with an end of resistance (R3); The negative electricity of one end of the other end of resistance (R3), resistance (R2) and diode (D4) is connected to form common junction, and this common junction is the signal voltage output in described intrinsic safety guide loop (1); The other end of resistance (R2) is second ac power input end in described intrinsic safety guide loop (1);
Described signal processing unit (2) comprises resistance (R4), resistance (R5) and operational amplifier (T); One end of resistance (R4) is the signal voltage input of described signal processing unit (2); The inverting input conllinear of one end of the other end of resistance (R4), resistance (R5) and operational amplifier (T); The normal phase input end of operational amplifier (T) is the direct-current coupling voltage input end of described signal processing unit (2); The other end of resistance (R5) is electrically connected with the output of operational amplifier (T) and forms common junction, and this common junction is the signal voltage output of described signal processing unit (2);
Described logic determines control unit (3) comprises single-chip microcomputer and superior processor; Single-chip microcomputer has signal input part, and superior processor has signal output part; Superior processor is electrically connected with single-chip microcomputer, and the signal input part of single-chip microcomputer is the signal input part of described logic determines control unit (3); The signal output part of superior processor is the shows signal output of described logic determines control unit (3);
Described display unit (4) comprises display screen, and described display screen has signal input part, and this signal input part is the shows signal input of described display unit (4);
Described performance element (5) comprises switch relay (K), resistance (R6), resistance (R7), triode (VT) and diode (D5); One end of resistance (R6) is the signal input end of described performance element (5); The base stage conllinear of one end of the other end of resistance (R6), resistance (R7) and triode (VT); The emitter grounding of the other end of resistance (R7) and triode (VT); A terminals conllinear of the coil of the positive pole of the collector electrode of triode (VT), diode (D5) and switch relay (K); Another terminals of the coil of the negative pole of diode (D5) and switch relay (K) are electrically connected and form common junction, and this common junction is the dc power supply terminal of described performance element (5); The fixed contact of often opening of switch relay (K) is electrically connected with an end of the start button (S1) in described intrinsic safety guide loop (1); The moving contact of switch relay (K) is electrically connected with the other end of start button (S1).
3. self-fault distinguishing guide circuit system according to claim 2 is characterized in that: the resistance value of described resistance (R1) and resistance (R3) equates; The resistance value of resistance (R4) and resistance (R5) equates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201524477U CN202586268U (en) | 2012-04-12 | 2012-04-12 | Self fault discrimination pilot circuit system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201524477U CN202586268U (en) | 2012-04-12 | 2012-04-12 | Self fault discrimination pilot circuit system |
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|---|---|
| CN202586268U true CN202586268U (en) | 2012-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012201524477U Expired - Fee Related CN202586268U (en) | 2012-04-12 | 2012-04-12 | Self fault discrimination pilot circuit system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103715648A (en) * | 2013-12-13 | 2014-04-09 | 常州联力自动化科技有限公司 | Pilot circuit processing device |
-
2012
- 2012-04-12 CN CN2012201524477U patent/CN202586268U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103715648A (en) * | 2013-12-13 | 2014-04-09 | 常州联力自动化科技有限公司 | Pilot circuit processing device |
| CN103715648B (en) * | 2013-12-13 | 2016-05-25 | 常州联力自动化科技有限公司 | A kind of pilot circuit treating apparatus |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121205 Termination date: 20170412 |