CN202033446U

CN202033446U - Electrical equipment failure monitoring device

Info

Publication number: CN202033446U
Application number: CN201120138794XU
Authority: CN
Inventors: 傅哲龙; 黄永福
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-05-05
Filing date: 2011-05-05
Publication date: 2011-11-09
Anticipated expiration: 2021-05-05

Abstract

The utility model relates to the field of electronics, in particular to an electrical equipment failure monitoring device. The device comprises a three-phase over-current acquisition circuit, an analog switching circuit, an A/D (Analog/Digital) data conversion circuit, a singlechip control circuit, a breaker driving circuit, an RS485 communication interface circuit and a wireless receiving and transmitting circuit, wherein an acquired signal is transmitted to the A/D data conversion circuit through the analog switching circuit by the three-phase over-current acquisition circuit; a data signal is transmitted to the singlechip control circuit by the A/D data conversion circuit; and the output is controlled by the singlechip control circuit to be connected to the breaker driving circuit, the RS485 communication interface circuit and the wireless receiving and transmitting circuit. In the device, a circuit over-load failure signal is acquired by using the three-phase over-current acquisition circuit and is output under the control of a singlechip, a data command signal is transmitted to a PC (Personal Computer) through a system bus and alarm information is sent out to personnel in a duty room by the wireless receiving and transmitting circuit, and a breaker is cut off for tripping, so that the safety of electrical equipment and a power supply circuit is protected.

Description

A kind of electrical equipment malfunction monitoring device

Technical field

The utility model relates to electronic applications, particularly be a kind of electrical equipment malfunction monitoring device.

Background technology

Raising along with Chinese economic development and resident's modern life level, the big increase of power consumption, make electrical equipment and electrical circuit fault overload occur and cause the phenomenon of aging circuit and finally cause the frequency of fire more and more higher, the hidden danger that fire brings also increases severely thereupon, and the country and people's the security of the lives and property has been caused severe impairment.

The utility model content

The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of electrical equipment malfunction monitoring device is provided.

The technical scheme that its technical matters that solves the utility model adopts is: a kind of electrical equipment malfunction monitoring device, comprise three-phase excess current Acquisition Circuit, analog switching circuit, the A/D data converting circuit, single chip machine controlling circuit, the isolating switch driving circuit, RS485 communication interface circuit and wireless transceiver circuit, described three-phase excess current Acquisition Circuit sends to the A/D data converting circuit with the signal of gathering through analog switching circuit, data-signal by the A/D data converting circuit sends to single chip machine controlling circuit, connects the isolating switch driving circuit by single chip machine controlling circuit control output again, RS485 communication interface circuit and wireless transceiver circuit.

The way of described single chip machine controlling circuit control switching analoging switch circuit.

Described single chip machine controlling circuit output connects a watchdog circuit.

The current sensor output that described three-phase excess current Acquisition Circuit is connected by phase line connects voltage-regulating circuit and current rectifying and wave filtering circuit constitutes.

Described RS485 communication interface circuit sends data message by the SN75176 communication interface chip to PC.

Described wireless transceiver circuit adopts FDD-5 transmitter module and JDD-5 receiver module.

By adopting above-mentioned technical scheme; the beneficial effects of the utility model are: this device adopts three-phase excess current Acquisition Circuit to gather the circuit overload fault-signal; export by Single-chip Controlling; send warning message to PC transmission data command signal and wireless transceiver circuit to the duty room personnel by system bus; and cut off the circuit breaker tripping separating brake, protect the safety of consumer and supply line.

Description of drawings

Fig. 1 is a frame assumption diagram of the present utility model;

Fig. 2 is circuit theory diagrams of the present utility model.

Embodiment

As shown in Figure 1, a kind of electrical equipment malfunction monitoring device of the present utility model, comprise three-phase excess current Acquisition Circuit 1, analog switching circuit 11, A/D data converting circuit 12, single chip machine controlling circuit 2, isolating switch driving circuit 21, RS485 communication interface circuit 22 and wireless transceiver circuit 23, described three-phase excess current Acquisition Circuit 1 sends to A/D data converting circuit 12 with the signal of gathering through analog switching circuit 11, data-signal by A/D data converting circuit 12 sends to single chip machine controlling circuit 2, connect isolating switch driving circuit 21 by single chip machine controlling circuit 2 control outputs again, RS485 communication interface circuit 22 and wireless transceiver circuit 23, the way of described single chip machine controlling circuit 2 control switching analoging switch circuit 11, described single chip machine controlling circuit 2 outputs connect a watchdog circuit 3.

As shown in Figure 2, by current sensor L 3, adjustable resistance W1, diode D1, capacitor C 1, capacitor C 2, resistance R 1, resistance R 2 grades are formed three-phase excess current Acquisition Circuit, when phase line is passed current sensor L3 and is had electric current to pass through, the secondary two ends of current sensor L3 produce the ac induction voltage signal, after adjustable resistance W1 adjusts, diode D1 is rectified into d. c. voltage signal, after signal Processing such as filtering, be input to 4051 analog switch chip U1 the 4th pin, by the 9th of 4051 analog switch chip U1,10, the 24th of 11 pin and single-chip microcomputer IC1,25,26 pin are formed datel circuit, switch the switching way of 4051 analog switch chip U1 by single-chip microcomputer IC1 control, respectively by the 3rd pin output switching signal of 4051 analog switch chip U1, this signal is input to the 2nd pin of A/D converter U2, through the 5th of A/D converter U2,6, the 35th of 7 pin and single-chip microcomputer IC1,36,37 pin are formed datel circuit, read A/D converter U2 current data information through single-chip microcomputer IC1, when U1 the 3rd pin BU point current potential, when getting setting value above IC1 because of load current, after judging, divides single-chip microcomputer IC1 internal processes three tunnel outputs, first via output is exported high level through resistance R 8 current limlitings by the 8th pin of single-chip microcomputer IC1, make triode VT1 conducting, the relay J adhesive, relay switch J-1 is by transferring normally closed point normal battle to, isolating switch KM shunt opening circle gets, promote isolating switch KM dropout separating brake, the safety of protection consumer and supply line; The second tunnel output is formed RS485 communication data driving circuit by the 1st, 2,3,4 pin of SN75176 communication interface chip IC4 and the 10th, 11,27 pin of single-chip microcomputer IC1, transfer two buses to by the 6th, 7 of SN75176 communication interface chip IC4 and be connected to PC, send data message by single-chip microcomputer IC1 to SN75176 communication interface chip IC4, be connected to PC through system bus, promote PC and show current fault status information; Third Road output makes diode VT2 conducting by the electronegative potential drive signal of the 39th pin I/O mouth output of single-chip microcomputer IC1 through resistance R 7, be input to the 2nd pin of FDD-5 transmitter module IC2, and deliver to its 3rd pin modulation signal input end CP the high-frequency signal of emission is modulated, antenna TX promptly launches modulated frequency electromagnetic waves to JDD-5 receiver module IC5, the 4th pin audio signal output end CPA of JDD-5 receiver module IC5 directly drives common electrical dynamic formula loudspeaker Y sounding, and its 2nd pin data output end output high level makes LED 1 get electroluminescence simultaneously.Expression receives the alerting signal of extension set.

The principle of current sensor L1, L2 is the same with the principle of current sensor L3, no longer repeats here.

Above-described only is a preferred embodiment of the present utility model, can not limit the scope that this practicality is implemented, and every equalization of being done according to the utility model claim changes and decorates, and all should still belong in the scope that the utility model contains.

Claims

1. electrical equipment malfunction monitoring device, it is characterized in that: comprise three-phase excess current Acquisition Circuit (1), analog switching circuit (11), A/D data converting circuit (12), single chip machine controlling circuit (2), isolating switch driving circuit (21), RS485 communication interface circuit (22) and wireless transceiver circuit (23), described three-phase excess current Acquisition Circuit (1) sends to A/D data converting circuit (12) with the signal of gathering through analog switching circuit (11), data-signal by A/D data converting circuit (12) sends to single chip machine controlling circuit (2), connects isolating switch driving circuit (21) by single chip machine controlling circuit (2) control output again, RS485 communication interface circuit (22) and wireless transceiver circuit (23).

2. a kind of electrical equipment malfunction monitoring device according to claim 1 is characterized in that: the way of described single chip machine controlling circuit (2) control switching analoging switch circuit (11).

3. a kind of electrical equipment malfunction monitoring device according to claim 1 and 2 is characterized in that: described single chip machine controlling circuit (2) output connects a watchdog circuit (3).

4. a kind of electrical equipment malfunction monitoring device according to claim 1 is characterized in that: the current sensor output that described three-phase excess current Acquisition Circuit (1) is connected by phase line connects voltage-regulating circuit and current rectifying and wave filtering circuit constitutes.

5. a kind of electrical equipment malfunction monitoring device according to claim 1 is characterized in that: described RS485 communication interface circuit (22) sends data message by the SN75176 communication interface chip to PC.

6. a kind of electrical equipment malfunction monitoring device according to claim 1 is characterized in that: described wireless transceiver circuit (23) adopts FDD-5 transmitter module and JDD-5 receiver module.