CN201927548U

CN201927548U - Controller of relay

Info

Publication number: CN201927548U
Application number: CN2011200196038U
Authority: CN
Inventors: 冯学军
Original assignee: BEIJING JINYU JIAXIN TECHNOLOGY DEVELOPMENT Co Ltd
Current assignee: BEIJING JUNYUJIAXIN TECHNOLOGY CO., LTD.
Priority date: 2011-01-21
Filing date: 2011-01-21
Publication date: 2011-08-10
Anticipated expiration: 2021-01-21

Abstract

The utility model relate to a controller of a relay, which comprises a singlechip, a driver, a relay and a latch, wherein the singlechip comprises two output ends, one output end is used for selecting the latch, and the other output end is connected with and used for outputting a driving signal by the latch; and the latch is connected with and is used for controlling the relay by the driver. After the controller of the relay is used, the reliability and the stability of a control circuit are improved, a controlled equipment can be well protected, an automatic control technology of the relay is well applied, the controller is convenient to spread and wide to apply, the false operation of the relay is avoided, and the controller is particularly suitable for controlling the multichannel relay and the ultra-multichannel relay, so that the controller of the relay is more suitable for the wide popularization and use.

Description

Relay control device

Technical field

The utility model relates to a kind of relay control device.

Background technology

Relay is a kind of electronic control device, has control system (claim not only input circuit) and Be Controlled system (but also claiming output loop), is applied to usually in the automatic control circuit, is actually a kind of " automatic switch " that remove to control big electric current with less current.Control relay circuit mainly plays effects such as automatic adjusting, safeguard protection, change-over circuit.

The existing relay control device mainly adopts Single-chip Controlling reverse driven (as ULN2803) or triode, drives relay by reverse driven or triode again.See also Fig. 1, shown in Figure 2, these two kinds of drive controlling modes, circuit is all fairly simple, and the drive controlling process is also fairly simple, single-chip microcomputer, driver, the shared power supply of relay.Under the situation, after the VCC1 energising, single-chip microcomputer, driver, relay might power on simultaneously in this, also might not power on simultaneously, and this will cause the condition of relay coil action inaccurate, causes the relay malfunction.Especially single-chip microcomputer is not worked, and under the situation that relay has been worked earlier, the recoil electromotive force of relay very easily damages driver and single-chip microcomputer, therefore has potential safety hazard.

This shows, above-mentioned existing relay control device is in circuit design and use, obviously still there are deficiency and defective, and in the actual life, operation to High-Voltage Electrical Appliances is more and more, the Long-distance Control of equipment and the requirement of controlling automatically are also particularly remarkable, relay control technology range of application is also just more extensively also strict more with stable requirement to the fail safe of relay control, therefore, how designing better relay control device of a kind of fail safe and stability, is one of important research target of current this area.

The utility model content

The technical problems to be solved in the utility model provides a kind of relay control device, makes its fail safe and stability better, thereby overcomes the deficiency of existing relay control device.

For solving the problems of the technologies described above, a kind of relay control device of the utility model comprises single-chip microcomputer, driver, relay and latch, and wherein: single-chip microcomputer has two outputs, an output is used for choosing latch, and another output connection is also passed through the latch output drive signal; Latch connects and control relay through driver.

As a kind of improvement of the present utility model, also be connected with optocoupler between described latch and the driver.

Described optocoupler is connected with latch by triode 1Q1.

The power supply of described single-chip microcomputer, optocoupler, relay is independent separately.

Described driver is triode 1Q2.

After adopting such structure, the utility model has following advantage at least:

1, by the state latch function of latch drive signal is selected, the controlled coefficient of safety of relay is improved;

2, the sheet by latch selects function, makes this circuit expand easily, and is convenient in the application of super multicircuit relay control;

3, by light lotus root device two kinds of circuit are isolated, guaranteed the stable of control signal ends such as single-chip microcomputer, prevent the electromotive force recoil single chip circuit that external Design is returned by relay;

4, by the processing of photoelectric isolating circuit and buffering circuit, when having guaranteed that control signal is not sent, relay is in off-state forever;

5, by the processing of this circuit, when having guaranteed that powered on moment power supply electrifying order is asynchronous, relay can malfunction.

In sum; the utility model relay control device; the reliability and stability of control circuit itself have been improved; also can play a very good protection to controlled plant simultaneously, make the relay automatic control technology obtain better application, and expansion is convenient; be widely used; avoided the mode of relay malfunction, effect is especially obvious in to the application of control multichannel and the control of super multicircuit relay, thereby is suitable for more extensively promoting the use of.

Description of drawings

Above-mentioned only is the general introduction of technical solutions of the utility model, and for can clearer understanding technological means of the present utility model, the utility model is described in further detail below in conjunction with accompanying drawing and embodiment.

Fig. 1 is the circuit connection diagram that existing ULN2803 drives relay control device.

Fig. 2 is the circuit connection diagram that existing triode drives relay control device.

Fig. 3 is the circuit connection diagram of the utility model relay control device.

Embodiment

See also shown in Figure 3ly, the utility model relay control device comprises single-chip microcomputer, driver, relay, latch and optocoupler.

Wherein, single-chip microcomputer has two outputs: an output is used for choosing latch; Another output (promptly controlling pin) connects latch, and by latch 74H573 output control signal.

Optocoupler TL521-1 is connected with triode 1Q1, and triode 1Q1 is connected with latch 74H573 by resistance 1R1.Light lotus root device TL521-1 mainly plays the effect of isolating electric signal, and single-chip microcomputer and latch are had protective effect.

Relay is connected with optocoupler by driver.

Driver can be the triode 1Q2 shown in the figure, the control signal that receives is amplified, and drive relay.

Preferable, as shown in the figure, the power supply of above-mentioned single-chip microcomputer, optocoupler, relay is independent separately.

In the utility model, under the selected state of latch 74H573 (CS5=1), the control signal that single-chip microcomputer sends just can be transferred to the rear end of latch 74H573.When latch is not selected, the then acomia output that is transferred to latch of the control signal of single-chip microcomputer.Below specify under the selected and unchecked situation of latch 74H573 the action situation of relay.

Chip select pin CS5=1, latch 74H573 is selected, and when the Single-chip Controlling pin was low level (COM1=0), network node JDQ1 point was a low level, the optocoupler conducting, the relay adhesive, the normally opened contact closure, normally-closed contact disconnects.

Chip select pin CS5=1, latch 74H573 is selected, and when the Single-chip Controlling pin was high level (COM1=1), network node JDQ1 point was a high level, not conducting of optocoupler, the relay adhesive, normally opened contact disconnects, the normally-closed contact closure.

Chip select pin CS5=0, this moment, latch 74H573 was not selected, and the drive signal of Single-chip Controlling pin can't be issued on the relay, and relay is failure to actuate.

The utility model is the relay control device that adopts the light-coupled isolation of buffer control, and by the experiment that repeatedly powers on, circuit is reliable and stable, and no circuit devcie damages phenomenon.In the practice, by single-chip microcomputer 256 relays are controlled, result of use is good, and relay malfunction probability is zero.

The utility model relay control device, start of the influence of the startup recoil electromotive force of sequential and relay at relay and drive power supply, adopt the Single-chip Controlling latch, again by latch control optocoupler to circuit, pass through the driving enlarging function of triode again, relay is controlled.The utility model has effectively been avoided factors such as circuit powered on moment electric energy shakiness, causes single-chip microcomputer, driving element to burn out and problem that relay misoperation is done, and the chip latch technique of employing makes the autgmentability of relay control stronger.

The above; it only is preferred embodiment of the present utility model; be not that the utility model is done any pro forma restriction, those skilled in the art utilize the technology contents of above-mentioned announcement to make a little simple modification, equivalent variations or modification, all drop in the protection range of the present utility model.

Claims

1. a relay control device is characterized in that comprising single-chip microcomputer, driver, relay and latch, wherein:

Single-chip microcomputer has two outputs, and an output is used for choosing latch, and another output connection is also passed through the latch output drive signal;

Latch connects and control relay through driver.

2. relay control device according to claim 1 is characterized in that also being connected with between described latch and the driver optocoupler.

3. relay control device according to claim 2 is characterized in that described optocoupler is connected with latch by triode 1Q1.

4. relay control device according to claim 2 is characterized in that the power supply of described single-chip microcomputer, optocoupler, relay is independent separately.

5. according to each described relay control device among the claim 1-4, it is characterized in that described driver is triode 1Q2.