CN202196138U

CN202196138U - Open circuit alarming device for static circuit

Info

Publication number: CN202196138U
Application number: CN201120331043XU
Authority: CN
Inventors: 郭权
Original assignee: BEIJING DESIGN TECHNOLOGY Co Ltd
Current assignee: BEIJING DESIGN TECHNOLOGY Co Ltd
Priority date: 2011-09-06
Filing date: 2011-09-06
Publication date: 2012-04-18
Anticipated expiration: 2021-09-06

Abstract

The utility model provides an open circuit alarming device for a static circuit, which includes an acoustic-optic alarming circuit, wherein the acoustic-optic alarming circuit includes a power supply circuit, a control circuit, an alarming device and an alarming self-checking circuit. The open circuit alarming device has the advantages of low cost, simple structure and convenience for installation, and is suitable for electronic products or electronic equipment requiring static protection. When a static circuit is reliably connected, a green LED of the acoustic-optic alarming circuit is lighted up, and the device issues no optical alarm and is in a monitoring state; and when the static circuit is disconnected or is not grounded reliably, a red LED of the circuit is lighted up in rapid reaction, and a buzzer issues alarming simultaneously to remind that the static circuit is already disconnected with the ground, so that people is timely reminded for maintenance, and the product or the equipment is guaranteed to be safe.

Description

A kind of static line broken circuit warning device

Technical field:

The utility model relates to a kind of break alarm device, particularly a kind of static line broken circuit warning device that is arranged on Electronics Factory's production line.

Background technology:

The static line broken circuit warning device complex structure of prior art, price height find to have simple in structure, economic and practical static line broken circuit warning device as yet.

Happen occasionally in electron production line static line broken circuit situation; As because of imperfect earth or wrong ground connection; Or, static uneven because of equipment electric leakage, each earthed system earthing potential can not leak over the ground, be struck by lightning and produces surge voltage and electric switch and close the broadband induction of generation components and parts and equipment are caused damage; Or because of the improper damaged line of engineering construction, and the static line length phase use and cause wearing out, finally cause electrostatic prevention to lose efficacy; These situation have had a strong impact on the reliability of electronic product, even can cause heavy losses.

The place that relates to electrostatic defending in the electron trade is a lot, as: integrated circuit manufacturing and encapsulation, electronic product production and manufacturing, electronics machine room, workshop.Therefore, must use static circuit alarm device to guarantee that static can effectively leak over the ground.

The utility model content:

The utility model is to the deficiency of prior art; Provide that a kind of cost is low, simple in structure, simple installation is applicable to electronic product or electronic equipment has the occasion of electrostatic defending demand; Monitor the real time status in whole static loop in real time through the warning of static line broken circuit; Reminds people is in time safeguarded, to guarantee the safety of product or equipment.

A kind of static line broken circuit warning device; Comprise a sound light alarming circuit, said sound light alarming circuit comprises power circuit, control circuit, warning device, the warning self-checking circuit; Said power circuit provides power supply to control circuit; Said control circuit connects warning device and warning self-checking circuit, and the warning self-checking circuit also has a port, and this port is connected with production line static circuit.

Said power circuit is by an AC socket, the protective tube of a 1A, and an Industrial Frequency Transformer, a rectifier bridge, electric capacity of voltage regulation and three-terminal voltage-stabilizing chip constitute, and are used for line voltage with input and convert the 12V direct current to and supply entire circuit to use.

Said three-terminal voltage-stabilizing chip is 7812 chips.

Said control circuit comprises an operation amplifier circuit, and operation amplifier circuit 5 pin connect+12V, 4 pin ground connection, and 1 pin is a reverse input end, and 2 pin are input end in the same way, and 3 pin are output terminal.

Said operational amplifier is 2903 chips.

Description of drawings:

Fig. 1 is the power circuit diagram of the utility model;

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

Fig. 3 is the structured flowchart of the utility model.

Embodiment:

Engaging accompanying drawing and specific embodiment below further describes the utility model.

As shown in Figure 1, be the power circuit part of static break alarm device, constitute by Industrial Frequency Transformer, rectifier bridge, 7812 stabilized voltage supplys.Said power circuit provides stable 12V direct supply for the breaking alarming circuit, and at the alternating current of input end input (220V/50HZ), output terminal all can obtain stable 12V DC voltage.

The utility model is as shown in Figure 2, and when the static circuit is connected with the static broken circuit alarmer when intact, static circuit alarm device is connected with the static circuit through the PG point; Because of this warning device circuit is the equipotentiality body with the static loop relatively; So when switch D1 was closed, operational amplifier reverse input end 1 pin was low level, and operational amplifier in the same way input end 2 pin be high level; So operational amplifier output terminal 3 pin are high level; R2, LED2 form discharge loop at this moment, and green light LED2 is bright, and represent that the static circuit is normal this moment.

When disconnection fault a bit takes place in the static circuit; Operational amplifier reverse input end 1 pin is ground connection no longer, and level is elevated, and this level voltage is higher than operational amplifier 2 pin voltages; So operational amplifier 3 pin output low levels, thereby green light LED2 extinguishes because of the loop of not working.Triode Q1 base voltage is elevated simultaneously, causes the conducting of triode Q1 collector and emitter, and transistor emitter ground connection; Make R7, LED3 form discharge loop like this; Red light emitting diodes LED3 is bright, and simultaneously, R9, hummer BUZZER1 form discharge loop; Promote hummer and send chimes of doom, prompting static circuit lost efficacy with being connected of ground wire.

The utility model also has self-checking function, when when opening the D1 switch, is equivalent to PG point and static line and breaks off; If the warning device function is effective, can send sound and light alarm equally, if alarm free or report to the police undesired; Show that then warning device is bad, need on-call maintenance to handle.

As shown in Figure 3, the utility model needs external civil power 1, through Industrial Frequency Transformer 2 transformations; To reach the voltage stabilizing purpose; Putting in order through rectifier bridge 3 is direct current again, and 7812 stabilized voltage supplys 4 are carried out voltage stabilizing, through amplifier 5, self-test switch 9 and whether intact through check point 10 inspection static circuits.When static circuit circuit, red light emitting diodes 6 is bright, while hummer 8 sound, and good like the static circuit, then green LED 7 is bright, and hummer 8 does not ring.

Above-mentioned static circuit alarm circuit is contained in the shell of an epoxy plate material, is installed in the production line that need carry out electrostatic defending and does not hold, and the installation site can not influence normal operation, and static circuit alarm device is connected with the ground line socket.When the static circuit breaks off or do not have reliable ground, can remind the maintainer in time to rush to repair, in order to avoid cause damage.

Claims

1. static line broken circuit warning device; Comprise a sound light alarming circuit, said sound light alarming circuit comprises power circuit, control circuit, warning device, the warning self-checking circuit; Said power circuit provides power supply to control circuit; Said control circuit connects warning device and warning self-checking circuit, and the warning self-checking circuit also has a port, and this port is connected with production line static circuit.

2. static line broken circuit warning device according to claim 1; It is characterized in that: said power circuit is by an AC socket; The protective tube of a 1A, an Industrial Frequency Transformer, a rectifier bridge; Electric capacity of voltage regulation and three-terminal voltage-stabilizing chip constitute, and are used for line voltage with input and convert the 12V direct current to and supply entire circuit to use.

3. static line broken circuit warning device according to claim 2 is characterized in that: said three-terminal voltage-stabilizing chip is 7812 chips.

4. static line broken circuit warning device according to claim 1 is characterized in that: said control circuit comprises an operation amplifier circuit, and operation amplifier circuit 5 pin connect+12V; 4 pin ground connection; 1 pin is a reverse input end, and 2 pin are input end in the same way, and 3 pin are output terminal.

5. static line broken circuit warning device according to claim 4 is characterized in that: said operational amplifier is 2903 chips.