CN2311041Y

CN2311041Y - Microcomputerized switching time controller adapted for street lamp and advertisement lamp specially

Info

Publication number: CN2311041Y
Application number: CN 97200722
Authority: CN
Inventors: 赖康生; 赖建生
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-01-21
Filing date: 1997-01-21
Publication date: 1999-03-17
Anticipated expiration: 2007-01-21

Abstract

The utility model relates to an intelligent time switching control device. The intelligent time switching control device adopts a single-chip microcomputer and a clock chip to serve as a core; the intelligent time switching control device is matched with a switch power supply circuit and a zero passage triggering thyristor output circuit, and the intelligent time switching control device adopts an LED nixie display and a set of light emitting diodes to serve as display units. The utility model can be used for the automatic control of street lamps and advertisement lamps.

Description

Special-purpose micro computer controller switching time of street lamp advertising lamp

A kind of can be according to longitude and latitude and seasonal variations, by the uranology principle calculate darkness and at day between, and then realize control device switching time that the switch of street lamp and advertising lamp is controlled automatically.

At present, the automatic control of street lamp and advertising lamp adopts the light-operated mode that combines with timing controlled to realize, by the extraneous intensity variations of illuminance sensor perception, when illuminance drops to a certain degree, open, and when illuminance is increased to a certain degree, close; When needs are turned off the light in the second half of the night, finish by timer control.Because the sensor photosensitive window is subjected to extraneous dust pollution unavoidably, cause opening and closing too early or spend evening even control malfunctioning easily.

The Chinese patent application that formerly has number is in 94235873.2 the monolithic processor control device (by single-chip microcomputer, latch, program storage, clock circuit, LCD, keyboard, the amplifier output control circuit that Darlington is formed, transformer, UPS uninterrupted power source, relay etc. are partly formed, and by the simulation software control relay output at sunshine), having adopted with the single-chip microcomputer is the circuit at center, is powered to Single Chip Microcomputer (SCM) system by ups power during power failure, guarantees the continuity of single-chip microcomputer non-stop run and time accumulative total.

Because this device is the center with the single-chip microcomputer, when Single Chip Microcomputer (SCM) system is subjected to strong electromagnetic, run unrest in case program occurs, will make clock data and other message interrupts even lose, cause controlling malfunctioning.Existing apparatus is owing to adopt the power frequency supply transformer-supplied and make standby power supply with battery in addition, and volume and weight is bigger.

A kind of Single Chip Microcomputer (SCM) program is run disorderly even the purpose of this utility model is design, and the interference free performance that also can not lose clock data and default information is better, the street lamp advertising lamp controller that volume is littler.Device is also improved to some extent aspect directly perceived easy and simple to handle.

The utility model is achieved in that with the inner clock chip of not being afraid of power down that has battery provides real-time clock and saved system information; With the single-chip microcomputer calculating darkness that has program storage with at day, and drive nixie display and one group of display mode indication light emitting diode; Utilize 3 button inputs and revise systematic parameter; The output control signal of single-chip microcomputer drives load by the output of zero cross fired controllable silicon output control circuit; The 5V direct supply of needs such as single-chip microcomputer, nixie display is provided by Switching Power Supply; When single-chip microcomputer is subjected to electromagnetic interference (EMI) and when occurring crashing, utilize the inner or outside watchdog circuit of single-chip microcomputer that it is resetted.

When device incoming transport 220V power supply, switching power circuit provides 5V working power for whole device; Single-chip microcomputer reads the real-time clock that the special clock chip of not being afraid of power down provides, with the longitude that sets, the latitude value that are kept in this clock chip, according to the uranology principle calculate darkness and at day between, and according to the mode of operation of street lamp that sets or advertising lamp, by the output of zero cross fired ghyristor circuit, the Kai Heguan of control street lamp or advertising lamp.When installing not incoming transport 220V power supply, single-chip microcomputer does not obtain working power, or single-chip microcomputer is interfered, and that program run is occurred is unusual, and when making the single-chip microcomputer cisco unity malfunction, the special clock chip of not being afraid of power down will continue the continuous operation of maintenance clock, and the default information Bu Hui Lost that guarantees to be stored in this chip loses.The watchdog circuit that is provided with in the device, when the Single Chip Microcomputer (SCM) program operation exception, the single-chip microcomputer that will automatically reset makes it recover normal operation.Nixie display in the device and display mode indication light emitting diode are used for demonstration time and system information by Micro Controller Unit (MCU) driving.

Owing to adopted the special clock chip of not being afraid of power down to provide real-time clock and saved system set information for device, even single-chip microcomputer is interfered, program is run disorderly, also can not cause losing of default information and clock data, and cause controlling malfunctioning; When having a power failure, do not need to join in addition the continuous operation that back-up source also can keep clock simultaneously.

Owing to adopted watchdog circuit monitoring single-chip microcomputer operation, so be interfered and occur when unusual when single-chip microcomputer, the watchdog circuit single-chip microcomputer that will automatically reset recovers normally it, the fault of single chip microcomputer halt can not occur.

Owing to adopted Switching Power Supply, can improve the ability that resists the electrical interference that seals in via power lead, improved the interference free performance of device, can make device operate as normal in very wide supply voltage scope simultaneously; In addition, owing to adopt Switching Power Supply, do not use the power frequency supply transformer, device does not use back-up source yet simultaneously, thereby has reduced the volume and weight of device.

Owing to adopted zero cross fired controllable silicon output control circuit, the switch of follow-up load when being zero, electric current is carried out, protected the contact of follow-up load, help prolonging its serviceable life.

Owing to adopted one group of display mode indication light emitting diode, make system information demonstration and adjust more ocular and clear.

The concrete structure of utility model is provided by following embodiment and accompanying drawing thereof.

The structured flowchart of this device of Fig. 1

Fig. 2 switching power circuit schematic diagram

Fig. 3 watchdog circuit theory diagrams

As shown in Figure 1, the utility model is by the clock chip of not being afraid of power down such as DS12887 (1), have the single-chip microcomputer of program storage such as AT89C51 (2), four LED nixie displaies (3), one group of (14) display mode indication light emitting diode (4), three buttons (5), watchdog circuit (6), switching power circuit (7) and two-way zero cross fired controllable silicon output control circuit 8 parts such as (8) composition, L1 and L2 are auxiliary reclay, street lamp or other follow-up load.

Clock chip DS12887 (1) links to each other with single chip computer AT 89C51 (2), for real-time clock information and saved system configuration information are provided; System software is installed in the program storage of single-chip microcomputer (2); Single-chip microcomputer (2) drives four LED nixie displaies (3) and display mode indication light emitting diode (4) with dynamic scan mode, is used for read clock and system information; Three buttons (5) that are connected with single-chip microcomputer (2) are used to change display mode and initialization system parameter; An output terminal of single-chip microcomputer (2) is linked the refresh signal input end REF of watchdog circuit (6), its output terminal is connected to the reset terminal RST of single-chip microcomputer (2), export during single-chip microcomputer (2) operate as normal refresh the speech number, watchdog circuit (6) can not be sent reset speech number, when single-chip microcomputer (2) operation irregularity can not send refresh signal, watchdog circuit (6) resets single-chip microcomputer (2) reset signal of sending.Switching power circuit (7) is used for the alternating current 220V power supply is converted into the 5V direct supply of isolating with it, for single-chip microcomputer (2), clock chip (1), watchdog circuit (6), nixie display (3), pattern indication light emitting diode (4), zero cross fired controllable silicon output control circuit (8) provide 5V direct supply.Two output terminals of single-chip microcomputer (2) P1 mouth are connected respectively to the control end KA and the KB of two zero cross fired controllable silicon output control circuits (8), controllable silicon output control circuit (8) input end is connected to power lead live wire L, the output terminal of controllable silicon output control circuit (8) is connected respectively to controlled external alternating current 220V load L1 and L2 one end, and the other end of L1 and L2 is connected to power lead ground wire N.

Zero cross fired controllable silicon output control circuit (8) can drive 3A/600V bidirectional triode thyristor such as TLC336 (BTR) composition through resistance R 1 and R2 by zero cross fired bidirectional triode thyristor output optocoupler such as MOC3081 (ISO).

Switching power circuit can adopt inverse-excitation type switch power-supply circuit as shown in Figure 2.The alternating current 220V power supply to capacitor C 1 charging, forms the 280V DC voltage through resistance R 1, R2 and rectifier bridge D1 by live wire L and ground wire N input on C1; Form the inverse-excitation type oscillatory circuit by the winding L on the pulse transformer T1 1, winding L 2, triode BG1, capacitor C 2 and resistance R 3; Stabilivolt W1, capacitor C 3, resistance R 4 and diode D2 form pressure limiting circuit; Pulse transformer T1 winding L 3, commutation diode D3 and capacitor C 4 are formed current rectifying and wave filtering circuit, output 5V direct current.

Outside watchdog circuit can be made up of monostable or multi-resonant oscillating circuit.The watchdog circuit of Fig. 3 for forming with the NE555 timing circuit.The refresh signal of single-chip microcomputer output is imported by REF, and through capacitor C 1, diode D1, D2 raise A point current potential to capacitor C 2 chargings; It is the oscillatory circuit of a few tens of milliseconds to several seconds that timing ic NE555 and C2, resistance R 1 are formed oscillation period, and the 3 pin output by NE555 to RST, is used to the single-chip microcomputer that resets.When the single-chip microcomputer operate as normal, refresh signal makes A point current potential remain height, and low level is failed in the oscillatory circuit failure of oscillations, the single-chip microcomputer that do not reset, and when the single-chip microcomputer operation irregularity can not send refresh signal, oscillatory circuit output square-wave signal, the single-chip microcomputer that resets, thus realize the watchdog circuit function.

Claims

1, the clock switch control device of a kind of street lamp and advertising lamp special use is characterized in that:

The one-chip computer (2) that program is equipped with in inside links to each other with the clock chip of not being afraid of power down (1), nixie display (3), button (5) and group mode indication light emitting diode (4) respectively, the output terminal of single-chip microcomputer links to each other with the control end of zero cross fired controllable silicon output circuit (8), switching power circuit (7) provides 5V dc supply for whole device, when using outside watchdog circuit (6), a pin of single-chip microcomputer refreshes end with watchdog circuit (6) and links to each other, and the output terminal of watchdog circuit links to each other with the reset terminal of single-chip microcomputer.

2,, it is characterized in that controlling output circuit is a zero cross fired controllable silicon output circuit (8) according to claim 1 described device.

3,, it is characterized in that adopting Switching Power Supply (7) to be the device power supply according to claim 1 described device.

4,, it is characterized in that adopting group mode indication light emitting diode (4) indicated number pattern according to claim 1 described device.