CN203118150U

CN203118150U - Non-polar electrical fire monitoring system

Info

Publication number: CN203118150U
Application number: CN 201320044420
Authority: CN
Inventors: 罗艳
Original assignee: Individual
Current assignee: Individual
Priority date: 2013-01-28
Filing date: 2013-01-28
Publication date: 2013-08-07
Anticipated expiration: 2023-01-28

Abstract

The utility model discloses a non-polar electrical fire monitoring system. The non-polar electrical fire monitoring system includes a zero-sequence transformer and a central monitoring host machine; the zero sequence transformer is directly connected with the central monitoring host machine through two buses; the zero-sequence transformer comprises a weak acquisition unit, an A/D converter, a CPU, and a control circuit which are electrically connected with each other successively; the zero-sequence transformer further comprises a non-polar conversion unit; and the non-polar conversion unit is composed of four electric bridges which are electrically connected with each other in an end-to-end manner. According to the non-polar electrical fire monitoring system of the utility model, the zero-sequence transformer is directly connected with the central monitoring host machine through the two buses, and an intermediate link of a monitor is omitted; the non-polar conversion unit is added in each zero-sequence transformer, the damage to devices or incapability of transmitting signals normally caused by reverse connection of signal lines in transmission can be avoided, and therefore, field construction is facilitated; and fault alarm and wrong alarm caused by the aging of wires or a situation that the wires are interfered by magnetic fields can be avoided; and anti-jamming ability is enhanced, and stability is strengthened, and installation space is saved.

Description

A kind of nonpolarity electric fire monitoring system

Technical field

The utility model relates to a kind of safety defense monitoring system, more specifically to a kind of nonpolarity electric fire monitoring system.

Background technology

Traditional electric fire monitoring system is normally gathered weak current by zero-sequence transformer and is sent watch-dog to through lead, watch-dog amplifies, changes, analyzes, contrasts the back to weak current data-signal is sent to the CSRC main frame, thereby reaches the purpose to electric fire disaster monitoring.

Now a lot of electric fire monitoring systems are to use RS422 or RS485 or CAN bus interconnection, and the RS422/485/CAN bus signals is to have the differential signal of polarity to transmit by 4 (2) roots, can not be with its reversal connection in work progress; Long or node for a long time when the circuit transmission range, the continuous line box of branch on the line also can be a lot, the wiring workmen need search one by one and differentiate positive signal wire and negative signal wire, and be easy to signal wire is connect in the transmission way anti-, thereby cause device failure or the signal can't normal transmission; Though can find the trouble spot, when junction box is a lot, also be a very time-consuming thing, and in order to connect up conveniently, divide the quantity of continuous line box often greater than the number of modules on the bus, for indoor heating system, transmission line generally adds the PVC wire casing even secretly is embedded in the body of wall; For outdoor system, circuit is built on stilts or underfloor cabling generally, like this to circuit reversal connection problem search and revise all very difficult; On the other hand, for easy construction, also should allow on the way arbitrarily wiring, not polarity.

Summary of the invention

The purpose of this utility model is to solve above-mentioned the deficiencies in the prior art and problem, and a kind of good stability is provided, and it is convenient to install, not the electric fire monitoring system of polarity.

The technical solution of the utility model is as follows:

A kind of nonpolarity electric fire monitoring system, comprise zero-sequence transformer and CSRC main frame, described zero-sequence transformer directly is connected with the CSRC main frame by two buses, described zero-sequence transformer comprises light current collecting unit, A/D converter, CPU, the control circuit that is electrically connected successively, it is characterized in that: described zero-sequence transformer also comprises nonpolarity converting unit, and described nonpolarity converting unit is electrically connected from beginning to end by four electric bridges to be formed.

As prioritization scheme of the present utility model, described zero-sequence transformer also comprises amplitude limiter circuit, amplifying circuit, rectification circuit.

As another kind of prioritization scheme of the present utility model, described zero-sequence transformer also comprises alarm unit.

As another kind of prioritization scheme of the present utility model, described zero-sequence transformer also comprises electrical apparatus release, reset circuit.

As another kind of prioritization scheme of the present utility model, described zero-sequence transformer also comprises communication module.

As another kind of prioritization scheme of the present utility model, described zero-sequence transformer also comprises display circuit, LED screen, temperature probe unit.

The utility model is compared with the conventional electrical fire monitoring system has following technique effect:

One increases nonpolarity converting unit in each zero-sequence transformer, having avoided that signal wire is connect anti-ballistic device failure or the signal of causing in the transmission way can't normal transmission, for site operation offers convenience.

They are two years old, the utility model directly is connected with the CSRC main frame by two buses by zero-sequence transformer, removed the lead that zero-sequence transformer is connected with watch-dog, in zero-sequence transformer, realize being flow to by light current the conversion of data-signal, on the one hand, removing lead has avoided being subjected to wrong report that reasons such as magnetic interference, lead are aging cause, misrepresenting deliberately because of lead, strengthened antijamming capability, on the other hand, the connection of minimizing circuit has been avoided because of the wrong report that poor contact of contacts causes, has not been reported, save cost, strengthened stability.

Description of drawings

Fig. 1 is a kind of electric fire monitoring system block scheme of the utility model.

Among the figure: the 1-zero-sequence transformer; The 2-A/D converting unit; 3-CPU; The 4-control circuit; The 5-amplitude limiter circuit; The 6-amplifying circuit; The 7-rectification circuit; The 8-alarm unit; The 9-electrical apparatus release; The 10-reset circuit; The 11-communication module; The 12-display circuit; 13-temperature probe unit; The 14-LED screen; 15-CSRC main frame; The nonpolarity converting unit of 16-; 17-light current collecting unit.

Embodiment

Make an explanation below in conjunction with 1 pair of the utility model technology contents of accompanying drawing:

As shown in Figure 1, a kind of nonpolarity electric fire monitoring system, comprise zero-sequence transformer 1 and CSRC main frame 15, described zero-sequence transformer 1 directly is connected with CSRC main frame 15 by two buses, described zero-sequence transformer comprises the light current collecting unit 17 that is electrically connected successively, A/D converter 2, CPU3, control circuit 4, it is characterized in that: described zero-sequence transformer 1 also comprises nonpolarity converting unit 16, described nonpolarity converting unit 16 is by four electric bridge VD1, VD2, VD3, VD4 is electrically connected composition from beginning to end, nonpolarity converting unit 16 in the described zero-sequence transformer 1, light current collecting unit 17, A/D converter 2, CPU3 and control circuit 4 are electrically connected successively.

Nonpolarity converting unit 16 electric bridge VD1 are connected two buses with VD3 as input pin in the utility model, and electric bridge VD2 is connected with zero-sequence transformer 1 internal circuit as output pin with VD4.

As prioritization scheme of the present utility model, described zero-sequence transformer 1 also comprises amplitude limiter circuit 5, amplifying circuit 6, rectification circuit 7; The weak current that light current collecting unit 17 obtains enters A/D converter 2 again and is converted to data message, effective like this having prevented because of the excessive damage A/D converter 2 of leakage current through amplitude limiter circuit 5, amplifying circuit 6, rectification circuit 7 successively.

As another kind of prioritization scheme of the present utility model, described zero-sequence transformer 1 also comprises alarm unit 8; The weak current that light current collecting unit 17 obtains is converted to data message and is sent to CPU through A/D converter 2, CPU analyzes, judges the amplitude that changes, and compare with alarm setting value, when the parameter value that obtains surpasses predefined threshold value of warning, to carry out early warning, the prompting staff keeps a close eye on work or the malfunction of alarm set point, in order in time take appropriate measures, and the generation of fire preventing in advance or electrical safety accident.

As another kind of prioritization scheme of the present utility model, described zero-sequence transformer 1 also comprises electrical apparatus release 9, reset circuit 10; The weak current that light current collecting unit 17 obtains is converted to data message and is sent to CPU through A/D converter 2, the data message of CPU carries out computing, when reaching setting valve, 4 pairs of electrical apparatus releases 9 of control circuit are given an order, electrical apparatus release 9 gets an electric shock and the earth leakage protection effect thereby play at 0.1 second internal cutting off power supply; Work as all clear, 10 pairs of electrical apparatus releases 9 of reset circuit are given an order and are restored electricity.

As another kind of prioritization scheme of the present utility model, described zero-sequence transformer 1 also comprises communication module 11; The data message of CPU carries out sending to the testing staff through communication module after the computing, realizes remote monitoring.

As another kind of prioritization scheme of the present utility model, described zero-sequence transformer 1 also comprises display circuit 12, LED screen 14, temperature probe unit 13; Light current collecting unit 17 and temperature probe unit 13 collection electric currents and temperature are converted to data message and are sent to CPU through A/D converter 2, the data message of CPU carries out computing, analysis is presented at electrical leakage and temperature on the LED screen 14 in real time by display circuit, and wherein LED screen 14 can be replaced by pilot lamp, charactron.

Claims

1. nonpolarity electric fire monitoring system, comprise zero-sequence transformer and CSRC main frame, described zero-sequence transformer directly is connected with the CSRC main frame by two buses, described zero-sequence transformer comprises light current collecting unit, A/D converter, CPU, the control circuit that is electrically connected successively, it is characterized in that: described zero-sequence transformer also comprises light current collecting unit, A/D converter, CPU, the control circuit that is electrically connected successively.

2. a kind of nonpolarity electric fire monitoring system according to claim 1 is characterized in that described zero-sequence transformer also comprises amplitude limiter circuit, amplifying circuit, rectification circuit.

3. a kind of nonpolarity electric fire monitoring system according to claim 1 and 2 is characterized in that described zero-sequence transformer also comprises alarm unit.

4. a kind of nonpolarity electric fire monitoring system according to claim 1 and 2 is characterized in that described zero-sequence transformer also comprises electrical apparatus release, reset circuit.

5. a kind of nonpolarity electric fire monitoring system according to claim 3 is characterized in that described zero-sequence transformer also comprises electrical apparatus release, reset circuit.

6. a kind of nonpolarity electric fire monitoring system according to claim 1 and 2 is characterized in that described zero-sequence transformer also comprises communication module.

7. a kind of nonpolarity electric fire monitoring system according to claim 5 is characterized in that described zero-sequence transformer also comprises communication module.

8. a kind of nonpolarity electric fire monitoring system according to claim 7 is characterized in that, described zero-sequence transformer also comprises display circuit, LED screen, temperature probe unit.