CN103035096A - Extensible multi-loop surplus current-mode electrical fire monitor extension set - Google Patents

Abstract

The invention discloses an extensible multi-loop surplus current-mode electrical fire monitor extension set which comprises multi-loop leakage current sensing circuits and multi-loop breaker condition monitoring circuits, wherein the multi-loop leakage current sensing circuits and the multi-loop breaker condition monitoring circuits are typeset on a printed circuit board (PCB), and each loop leakage current sensing circuit is corresponding to each loop breaker condition monitoring circuit. A lowest configuration of the extensible multi-loop surplus current-mode electrical fire monitor extension set is 3 loops, and a largest configuration of the extensible multi-loop surplus current-mode electrical fire monitor extension set is 6 loops. In a condition that the number of the loops is less than 6, the extensible multi-loop surplus current-mode electrical fire monitor extension set can be extended and is not enabled to affect other functions, and each extensible multi-loop surplus current-mode electrical fire monitor extension set can extends to 6 loops to a maximum extent. Therefore, flexibility of the extensible multi-loop surplus current-mode electrical fire monitor extension set is greatly improved, and the extensible multi-loop surplus current-mode electrical fire monitor extension set provides convenience for loop extension caused by line transformation.

Description

Extendible multiloop residual-current electrical fire monitoring extension set

Technical field

The present invention relates to a kind of extendible multiloop residual-current electrical fire monitoring extension set.

Background technology

Existing multichannel residual-current electrical fire monitoring, generally on circuit design, concentrate together for making effective other functions and the detecting function that make in the circuit of utilizing in space, or will separate with the deixis that detecting function matches, so just make multiloop expansion have certain limitation, the user also causes waste because monitoring loop needs again purchase of equipment not when track remodelling simultaneously.

Summary of the invention

In order to solve existing electrical fire-detector in the deficiency of again buying the aspects such as waste of the resource that causes, the objective of the invention is for the problems referred to above, kind of an extendible multiloop residual-current electrical fire monitoring extension set is provided.

For addressing the above problem, the present invention adopts following technical scheme:

A kind of extendible multiloop residual-current electrical fire monitoring extension set, it comprises: the multiloop leakage current detection circuit; Multiloop State-Inspect of High-Voltage Circuit circuit; On above-mentioned multiloop leakage current detection circuit and multiloop State-Inspect of High-Voltage Circuit circuit layout to a pcb board, and the corresponding circuit breaker status monitoring circuit of every road leakage current detection circuit.

Beneficial effect of the present invention is: in the situation that be less than 6 the tunnel, the multichannel residual current type detector for electric fire protection can be expanded and not affect other function, every minimalist configuration is 3 loops, can expand to 6 the tunnel at most, so just greatly increased the dirigibility of its use, the loop expansion that also occurs for track remodelling provides convenience.

Description of drawings

Fig. 1 is leakage current detection circuit;

Fig. 2 is compensating circuit;

Fig. 3 is the State-Inspect of High-Voltage Circuit circuit;

Fig. 4 is alarm output circuit;

Fig. 5 is the fire-fighting link warning circuit;

Fig. 6 is the DC-DC module;

Fig. 7 is the RS485 telecommunication circuit;

Fig. 8 is the extension set power supply circuit;

Fig. 9 is the shunt opening output circuit;

Figure 10 is the application drawing of Fig. 9;

Figure 11 is the electric circuit constitute block diagram of the present invention.

Embodiment

The present invention relates to extendible multi-loop electrical fire monitoring device.As shown in figure 11, it comprises 3 loop leakage current detection circuits and 3 circuit breaker status monitoring circuit, when generating PCB, 3 loop leakage current detection circuits and 3 circuit breaker state detection circuits are set type on the leakage circuit plate, and leakage current detection circuit corresponding circuit breaker status monitoring circuit in every road has so just realized that it can expand and not affect the purpose of other function.

In addition, also comprise RS485 telecommunication circuit, alerting signal output circuit, fire-fighting link warning circuit, Exgt Bat extension battery circuit, shunt opening output circuit.Wherein: RS485 telecommunication circuit, alerting signal output circuit, fire-fighting link warning circuit are set type on the RS485 communication board, and Exgt Bat extension battery circuit and 6 road shunt opening output circuits are set type on the block power supply circuit board.But above-mentioned RS485 communication board, leakage circuit plate, power supply circuit board are connected with mainboard by connecting-disconnecting interface, and mainboard connects the liquid crystal display wiring board by universal serial bus.Single chip circuit is housed on the mainboard.

Progressive ground:

Described leakage current detection circuit is comprised of leakage current transformer and sample resistance, sample resistance is in parallel with the output terminal of leakage current transformer, one end of leakage current transformer connects the reference voltage source of the voltage that affords redress, and the leakage current signal after the sampling passes to single-chip microcomputer and processes after amplifying.

Described State-Inspect of High-Voltage Circuit circuit is comprised of photoelectrical coupler, input end one termination power of photoelectrical coupler, the other end with meet GND after the auxiliary contact of isolating switch are connected, the auxiliary contact of isolating switch are closed or when disconnecting, and the output terminal of photoelectrical coupler is exported closure or cut-off signal thereupon and given single-chip microcomputer and process.

Described alerting signal output circuit is comprised of relay and triode, power supply is connected with the collector of triode by the coil of relay, whether single-chip microcomputer comes the coil of pilot relay to switch on by conducting and the cut-off of control triode, thereby comes the normally closed alerting signal of pilot relay output.

Described fire-fighting link warning circuit is comprised of photoelectrical coupler and commutation diode, the commutation diode forward is serially connected in the input circuit of photoelectrical coupler, the input termination fire-fighting link signal of photoelectrical coupler, the output terminal of photoelectrical coupler connects single-chip microcomputer, single-chip microcomputer output alarm signal or action.

Described RS485 telecommunication circuit is comprised of communication interface circuit and buffer circuit two parts, and communication interface circuit is communication interface chip, the interface chip control circuit that buffer circuit is comprised of three photoelectrical couplers; Wherein: the output of the first photoelectrical coupler is connected to the control end that sends and receives of interface chip; The receiving end of interface chip and transmitting terminal connect respectively the input end of the second photoelectrical coupler and the 3rd photoelectrical coupler.

Described Exgt Bat extension battery circuit is comprised of LC filtering circuit, voltage transformation module and output voltage stabilizing circuit, power supply is converted to the DC5V power supply by voltage transformation module with AC220V and exports to the electricity consumption device after filtering circuit filtering, output termination voltage stabilizing diode is realized the control to output voltage.

Described shunt opening output circuit is comprised of SI PO shift register, high-voltage great-current darlington transistor array and relay, the outside shunt opening output of another termination of two normal opened contacts, the one termination AC220V of relay, single-chip microcomputer is transferred to SI PO shift register with data with serial input mode, the respective pins output signal control Darlington transistor of SI PO shift register is exported large current signal and is driven corresponding relay coil, controls the output of shunt opening signal.

Below in conjunction with accompanying drawing each functional circuit is described further.

1. leakage current detection circuit

Figure 1 shows that leakage current detection circuit.Wherein: residual current transformer LD1 and sample resistance 2R1 form sample circuit, and sample resistance 2R1 is attempted by the two ends of residual current transformer LD1.Operational amplifier 2U1A and 2R2,2R3,2R4 form differential amplifier circuit.Operational amplifier 2U1B and 2R6,2R7,2R8,2R9,2C3,2C4 form the bandpass filtering amplifying circuit.Sample circuit, differential amplifier circuit, bandpass filtering amplifying circuit are connected successively.Sampling voltage on the sample resistance 2R1 is delivered to the La pin of single-chip microcomputer by 2R10 through twice amplification, single-chip microcomputer is processed data after the AD conversion.

Left side shown in Figure 1 is the sampling terminals, for avoid sampled signal too small make loss in the circuit excessive can't take a sample or take a sample inaccurate, the bucking voltage (Fig. 2 is holding of bucking voltage) that adds 2.048 volts of direct currents at the sampling end, make one section of the terminal voltage rising of sampling constant, when sampling brings out existing very little curent change, can make sample circuit obtain a higher sampled signal.

2. State-Inspect of High-Voltage Circuit circuit

Be illustrated in figure 3 as the State-Inspect of High-Voltage Circuit circuit, wherein: the auxiliary contact that left side FZ1 and GND connect isolating switch are the auxiliary contact input end, through optocoupler PC817 isolation, from 4 pin input single-chip microcomputer FZSR end, this function can be indicated the on off state of the isolating switch that connects auxiliary contact.

3. alarm output circuit

When any one or multinomial appearance in the circuit are reported to the police, the end of reporting to the police is exported normally closed signal (dry contact), as shown in Figure 4, HK4100F is relay, 1 and 5 are the warning output terminal, 3 and 4 is the input/output terminal of coil, and diode IN4007 has and prevents that coil from producing the effect that inverse current damages other device, and 8050 base stage control end BJSC connects single-chip microcomputer.

4. fire-fighting link warning circuit

Right side DC24V is the fire-fighting link input end as shown in Figure 5, for preventing external voltage DC24V extension set is exerted an influence, and uses optocoupler PC817 that external signal is isolated, and passes to single-chip microcomputer through the XFLD end, control system output alarm after single-chip microcomputer is processed.When there is fire-fighting signal (DC24V) input the outside, the extension set output alarm signal.

5.RS48 Serial Communication Function circuit

Be illustrated in figure 7 as the telecommunication circuit of extension set, the voltage source at optocoupler two ends can not share, must isolate otherwise can't communicate with the outside, 1U2,1U3,1U4 are isolation light idol among the figure, signal is isolated, and employing DC-DC module has carried out isolating (as shown in Figure 6) to the power supply of both sides among the present invention.

6. Exgt Bat extension battery circuit

Circuit is the power circuit of extension set as shown in Figure 8, and the input end of power supply is AC220V, and 1RV1 is voltage dependent resistor (VDR), and 1F1 is insurance resistance; 1C1 and inductance 1T1 form filtering circuit, are DC5V through the AC-DC module converts, are other electricity consumption device and the circuit supply in the extension set.

7. shunted exciter tripping circuit

74HC164D is 8 shift registers of wearing input, also exporting as shown in Figure 9, trip signal by 74HC164D wherein 6 pass to Darlington transistor ULN2003, Darlington transistor ULN2003 is the device that 7 tunnel little electric currents are inputted corresponding 7 road High-current outputs, its output current passes to the coil of relay, is used for the output (as shown in figure 10) of control shunt opening signal.

The present invention is by to the real-time detection of distribution system residual current, and the harm that in time discovery may occur can effective monitoring and prevent the electrical fire generation.Properties of product are perfect, and automaticity is high, are applicable to the household dwelling house, office building, fair market, public's entertainment place etc.

Above-mentioned embodiments of the present invention are carried out detailed explanation, for those skilled in the art, can implement technical solution of the present invention according to above-mentioned narration.

Claims (9)

1. an extendible multiloop residual-current electrical fire is monitored extension set, it is characterized in that comprising:

The multiloop leakage current detection circuit;

Multiloop State-Inspect of High-Voltage Circuit circuit;

On above-mentioned multiloop leakage current detection circuit and multiloop State-Inspect of High-Voltage Circuit circuit layout to a pcb board, and the corresponding circuit breaker status monitoring circuit of every road leakage current detection circuit.

2. extendible multiloop residual-current electrical fire as claimed in claim 1 is monitored extension set, it is characterized in that:

Described leakage current detection circuit is comprised of leakage current transformer and sample resistance, sample resistance is in parallel with the output terminal of leakage current transformer, one end of leakage current transformer connects the reference voltage source of the voltage that affords redress, and the leakage current signal after the sampling passes to single-chip microcomputer and processes after amplifying.

3. extendible multiloop residual-current electrical fire as claimed in claim 1 is monitored extension set, it is characterized in that:

Described State-Inspect of High-Voltage Circuit circuit is comprised of photoelectrical coupler, input end one termination power of photoelectrical coupler, the other end with meet GND after the auxiliary contact of isolating switch are connected, the auxiliary contact of isolating switch are closed or when disconnecting, and the output terminal of photoelectrical coupler is exported closure or cut-off signal thereupon and given single-chip microcomputer and process.

4. extendible multiloop residual-current electrical fire as claimed in claim 1 is monitored extension set, characterized by further comprising following circuit:

Alerting signal output circuit, fire-fighting link warning circuit, RS485 telecommunication circuit, Exgt Bat extension battery circuit, shunt opening output circuit.

5. extendible multiloop residual-current electrical fire as claimed in claim 4 is monitored extension set, it is characterized in that:

Described alerting signal output circuit is comprised of relay and triode, power supply is connected with the collector of triode by the coil of relay, whether single-chip microcomputer comes the coil of pilot relay to switch on by conducting and the cut-off of control triode, thereby comes the normally closed alerting signal of pilot relay output.

6. extendible multiloop residual-current electrical fire as claimed in claim 4 is monitored extension set, it is characterized in that:

Described fire-fighting link warning circuit is comprised of photoelectrical coupler and commutation diode, the commutation diode forward is serially connected in the input circuit of photoelectrical coupler, the input termination fire-fighting link signal of photoelectrical coupler, the output terminal of photoelectrical coupler connects single-chip microcomputer, single-chip microcomputer output alarm signal or action.

7. extendible multiloop residual-current electrical fire as claimed in claim 4 is monitored extension set, it is characterized in that:

Described RS485 telecommunication circuit is comprised of communication interface circuit and buffer circuit two parts, and communication interface circuit is communication interface chip, the interface chip control circuit that buffer circuit is comprised of three photoelectrical couplers; Wherein: the output of the first photoelectrical coupler is connected to the control end that sends and receives of interface chip; The receiving end of interface chip and transmitting terminal connect respectively the input end of the second photoelectrical coupler and the 3rd photoelectrical coupler.

8. extendible multiloop residual-current electrical fire as claimed in claim 4 is monitored extension set, it is characterized in that:

Described Exgt Bat extension battery circuit is comprised of LC filtering circuit, voltage transformation module and output voltage stabilizing circuit, power supply is converted to the DC5V power supply by voltage transformation module with AC220V and exports to the electricity consumption device after filtering circuit filtering, output termination voltage stabilizing diode is realized the control to output voltage.

9. extendible multiloop residual-current electrical fire as claimed in claim 4 is monitored extension set, it is characterized in that:

Described shunt opening output circuit is comprised of SI PO shift register, high-voltage great-current darlington transistor array and relay, the outside shunt opening output of another termination of two normal opened contacts, the one termination AC220V of relay, single-chip microcomputer is transferred to SI PO shift register with data with serial input mode, the respective pins output signal control Darlington transistor of SI PO shift register is exported large current signal and is driven corresponding relay coil, controls the output of shunt opening signal.

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