CN103812202A - Charger for emergency evacuation escaping system - Google Patents

Abstract

The invention discloses a charger for an emergency evacuation escaping system. A storage battery is charged by stages and is repaired throughout the process, so that vulcanization and ageing of the storage battery due to long-time laying-up are prevented, and the service life of the storage battery is prolonged. The charger maintains communication with the storage battery during charging to identify the conditions of the storage battery, which include storage battery open circuit, short circuit, inverted connection, energy storage capacity losing and the like. The charger comprises a CAN communication interface, failure contents are sent to a duty room or a control system through a CAN bus, sound and light alarm is performed, and specific positions and failure contents can be displayed on a display screen. By means of the charger, failures are alarmed and cleared timely, the normal operation of the system before disasters can be guaranteed, and unnecessary casualties are reduced.

Description

Emergency evacuation escape system charger

Technical field:

The present invention relates to public safety equipment technology, particularly relating to a kind of CAN of employing bus communication technology provides the charger of power supply for emergency evacuation escape system.

Background technology:

According to NFA regulation for safety, all public places or underground garage, all should be provided with emergency lighting (lamp) and fingerpost, and while being beneficial to disaster occurs, assignor's group energy is evacuated enough rapidly and escape route.At present, these facilities mostly adopt storage battery power supply, but this system is only just used in the time that disaster occurs, at ordinary times this system stored energy equipment whether store enough energy be difficult to grasp, to really needing the used time, storage battery may lose efficacy, and can not bring into play due effect.Therefore,, in order to prevent contingency, many public places have to emergency lighting to become altar lamp, cause unnecessary energy waste.

Summary of the invention

The present invention be directed to above-mentioned weak point, a kind of charger of intelligent emergency evacuation escape system is provided, adopt and stage by stage storage battery is charged, omnidistance reparation, prevents that storage battery from forming sulfuration, aging because shelving for a long time, extends the useful life of storage battery, this charging device is in charging, keep communicating by letter with storage battery, storage battery is diagnosed, content comprises: storage battery open circuit, short circuit, reversal connection and storage battery are lost energy storage capacity etc.This charger has CAN communication interface, and fault content is sent to night shift room or control centre by CAN bus, sound and light alarm, and can show particular location and fault content at display screen.Remind and fix a breakdown in time, guarantee that in the time that disaster occurs, system can normally be worked, and reduces unnecessary casualties.

For realizing above-mentioned technical purpose, the technical scheme that the present invention takes is: emergency evacuation escape system charger is made up of electronic circuit board, electronic circuit and electronic devices and components.Electronic circuit comprises rectifier bridge, MOSFET pipe (field effect transistor), high-frequency pulse transformer, fast recovery diode rectification circuit, sample circuit, negative pulse loop, main control chip (single-chip microcomputer) IC1, nixie display, photoelectrical coupler IC3 and power management chip IC2.Rectifier bridge input is connected with AC power, rectification bridge output end is connected with high-frequency pulse transformer by MOSFET pipe, high-frequency pulse transformer output is connected with fast recovery diode rectification circuit, high-frequency pulse transformer output is by the rectification of fast recovery diode rectification circuit, output direct current, charging a battery. fast recovery diode rectification circuit DC output end is connected with sample circuit, single-chip microcomputer IC1 is connected with photoelectrical coupler IC3, photoelectrical coupler IC3 is connected with managing chip IC2, power management chip IC2 is connected with MOSFET pipe, main control chip (single-chip microcomputer) IC1 again respectively with sample circuit and negative pulse loop, charactron display is connected, main control chip (single-chip microcomputer) IC1 samples by sample circuit.Described main control chip IC1 by sample circuit adopt after charge parameter, carry out data processing, analytical calculation, when storage battery is charged, according to the time, voltage, the isoparametric variation of electric current, analyze, judge storage battery vulcanization, aging, desiccation and incipient fault, judge that whether storage battery has standardized energy storage capacity, is reported, is reported to the police by CAN bus.Described charger has CAN communication interface, keeps CAN to communicate by letter with central control unit.Central control unit constantly sends network management message, system node is inquired, grasp the active situation of each node, in central control unit internal memory, have network node physical address, Node Diagnostics address, node state of activation, malfunction, bus failure or system compatible state.Fault content and the information of whole system,, reported to the police, show by network service by central control unit.

Accompanying drawing explanation:

Fig. 1 is overall structure schematic diagram of the present invention

In figure: 1exchanges input 2 rectification 3 high-frequency impulse transformation 4 fastrecovery diode rectification 5 sample circuit 6 power management chip 7photoelectrical coupler 8 main control chip 9negative pulse loop 10 nixie displaies

Embodiment:

Below in conjunction with accompanying drawing, the present invention will be further described:

Emergency evacuation escape system charger, its rectifier bridge input is connected with AC power, rectification bridge output end is connected with high-frequency pulse transformer by MOSFET pipe, high-frequency pulse transformer output is connected with fast recovery diode rectification circuit, high-frequency pulse transformer output is by the rectification of fast recovery diode rectification circuit, output direct current, charging a battery. fast recovery diode rectification circuit DC output end is connected with sample circuit, single-chip microcomputer IC1 is connected with photoelectrical coupler IC3, photoelectrical coupler IC3 is connected with managing chip IC2, power management chip IC2 is connected with MOSFET pipe, main control chip (single-chip microcomputer) IC1 again respectively with sample circuit and negative pulse loop, charactron display is connected, main control chip (single-chip microcomputer) IC1 samples by sample circuit.When storage battery is charged, storage battery is monitored and diagnosed, when storage battery is because of factors such as self discharges (electric discharge between accumulator plate and pole plate), cause voltage drop, in the time that accumulator voltage drops to setting, automatically storage battery is carried out to boost charge, keep storage battery to there is enough stored energys.The energy storage capacity of storage battery is analyzed, judged to this charger, according to the electrochemical properties of storage battery,, by storage battery open circuit, short circuit, reversal connection, and storage battery is lost the faults such as energy storage capacity, by CAN communication interface, send to night shift room or control centre, carry out sound and light alarm.

Charger adopts switch power supply topological structure, as switch, civil power is transformed into charge in batteries required voltage and electric current with semiconductor power device.Storage battery is along with capacity is different with storage of electrical energy, in the different charging stages, and required voltage and current difference, charger adopts single-chip microcomputer accurately to sample, the aperture of controlling electronic switch with pulse width modulation mode (PWM), reaches the output of control switch power supply, realizes closed-loop control.

The present invention adopts switch power technology, and under the control of single-chip microcomputer, semiconductor power device metal-oxide-semiconductor turns on and off at a high speed, and direct current is become to high-frequency ac, improves conversion efficiency, reduced volume.Can accurately control charging voltage and charging current, according to the different chemical composition of storage battery and charging requirement, charging process is divided into some different phases, positive negative pulse stuffing with different frequency, different interval, distinct pulse widths, different amplitudes charges, reach and reduce storage battery temperature rise, reduce gassing, improve battery current ability to accept, extending battery life.

The system diagnostics of emergency evacuation control unit is served realization by system diagnostics, and the length of diagnosis service CAN frame is fixed 8 bytes, and untapped byte fills out 0, and destination address (T) and source address (S) are subject to host-host protocol control.Source address is encoded in CAN identifier.In CAN message, identifier is as shown in the table:

Message identifier:

Central control unit has been stored the data of system original configuration node, is in operation, and central control unit sends network management request message every regular time, and all slave nodes are beamed back response message successively.Message adopts the form coding providing, represent node failure state with some specific word bit, central control unit is received these messages, form is decoded according to the rules, decision node configuring condition and malfunction, and system original configuration contrasts, if certain node is not replied, represent this node loss, may form dead point or blind area.

After slave node is received central control unit " network management request " message, to be replied as " network management response " message of identifier with self physical address, central control unit is according to the response message of all nodes, active state current each node and original configuration are given to comparison, play the effect of network management and system diagnostics.

Claims (2)

1. emergency evacuation escape system charger, it is characterized in that: charger is made up of electronic circuit board, electronic circuit and electronic devices and components, electronic circuit comprises rectifier bridge, MOSFET pipe (field effect transistor), high-frequency pulse transformer, fast recovery diode rectification circuit, sample circuit, negative pulse loop, main control chip (single-chip microcomputer) IC1, nixie display, photoelectrical coupler IC3 and power management chip IC2.Rectifier bridge input is connected with AC power, rectification bridge output end is connected with high-frequency pulse transformer by MOSFET pipe, high-frequency pulse transformer output is connected with fast recovery diode rectification circuit, high-frequency pulse transformer output is by the rectification of fast recovery diode rectification circuit, output direct current, charging a battery. fast recovery diode rectification circuit DC output end is connected with sample circuit, single-chip microcomputer IC1 is connected with photoelectrical coupler IC3, photoelectrical coupler IC3 is connected with managing chip IC2, power management chip IC2 is connected with MOSFET pipe, main control chip (single-chip microcomputer) IC1 again respectively with sample circuit and negative pulse loop, charactron display is connected, main control chip (single-chip microcomputer) IC1 samples by sample circuit, described main control chip IC1 by sample circuit adopt after charge parameter, carry out data processing.

2. emergency evacuation escape system according to claim 1, is characterized in that: between each network management control unit, have a twisted-pair feeder to be connected; Emergency lighting control unit keeps communicating by letter with central control unit; Emergency-lighting set is connected with the charger that is provided with storage battery open circuit, short circuit, reversal connection detection besel.

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