CN202652652U

CN202652652U - LED control driving unit capable of automatically writing address via RS-485 bus

Info

Publication number: CN202652652U
Application number: CN201220307905XU
Authority: CN
Inventors: 唐晓龙
Original assignee: Sichuan Jiuzhou Optoelectronics Technology Co Ltd
Current assignee: Sichuan Jiuzhou Optoelectronics Technology Co Ltd
Priority date: 2012-06-28
Filing date: 2012-06-28
Publication date: 2013-01-02
Anticipated expiration: 2022-06-28

Abstract

The utility model discloses an LED control driving unit capable of automatically writing an address via an RS-485 bus, belonging to an LED control unit based on an RS-485 bus. The LED control driving unit comprises a switch power source, a single-chip microcomputer and an LED driving power source. The switch power source is connected to a power line. The single-chip microcomputer is connected to the switch power source and the LED driving power source, respectively. A relay is also arranged on the power line in connection with the switch power source and is connected to the single-chip microcomputer. The driving unit is also equipped with an RS-485 signal processing module, which is respectively connected to the single-chip microcomputer and the switch power source. The RS-485 signal processing module is also connected to the RS-485 bus. The LED control driving unit of the utility model has a simple structure and is suitable for writing the address to itself under the DMX512 control protocol and for dimming and controlling an LED lamp which is connected to the LED control driving unit.

Description

LED control driver element by the automatic writing address of RS-485 bus

Technical field

The utility model relates to a kind of LED control unit based on the RS-485 bus, and in particular, the utility model relates generally to a kind of LED control driver element by the automatic writing address of RS-485 bus.

Background technology

In RS-485 bus control field, when the main frame in the control system will send control command to extension set, need to write fixing address code to extension set first, extension set could be identified main frame and issue its instruction like this, link to each other with exchange and all be equipped with many extension sets in the general RS-485 bus control system, and every extension set all needs respectively the writing address code and can not repeat, therefore too much such as the extension set in the control system, main frame need to expend the too much time during to extension set writing address code, and at present in the RS-485 bus control field the method for normal employing be manually to write one by one, namely with writing address code one by one again after writing yard device and extension set being connected by connecting line, concrete method is first to set address code writing a yard device, by connecting line address code is written to extension set again and is deposited in by the memory of extension set, or fill button at extension set, the artificial writing address code that touches the button, yet aforesaid two kinds of methods all bother in actual applications, and when work high above the ground, more should not use, and extension set need to be drawn separately an address wire, has also increased the complexity of RS-485 bus control system.And application of the present utility model also attempt to adopt the RS-485 bus to the automatic writing address successively of a plurality of extension sets before, the RS-485 bus is combined with power line, but owing to be provided with relay R S-485 signal in this kind mode in the middle of the RS-485 bus through relay, cause a little less than its antijamming capability, signal is easily decayed.

The utility model content

One of the purpose of this utility model is to solve above-mentioned deficiency, a kind of LED control driver element by the automatic writing address of RS-485 bus is provided, when solving in the prior art by the RS-485 bus to the automatic writing address of LED driving control unit with expectation a little less than the RS-485 signal antijamming capability, and the technical problems such as decay easily occur in signal.

For solving above-mentioned technical problem, the utility model by the following technical solutions:

The utility model provides a kind of LED control driver element by the automatic writing address of RS-485 bus on the one hand, comprise Switching Power Supply, single-chip microcomputer and LED driving power, described Switching Power Supply access power line, and described single-chip microcomputer accesses respectively Switching Power Supply and LED driving power, also be provided with relay on the power line of described Switching Power Supply access, and relay access single-chip microcomputer; Also be provided with the RS-485 signal processing module on the described driver element, the RS-485 signal processing module accesses respectively single-chip microcomputer and Switching Power Supply, and the RS-485 signal processing module also accesses the RS-485 bus.

Further technical scheme is: comprise at least the MAX485 chip in the described RS-485 signal processing module, and the MAX485 chip accesses respectively Switching Power Supply, single-chip microcomputer and RS-485 bus.

Further technical scheme is: described LED control driver element is identical a plurality of, and the Switching Power Supply of their inside access power line of all connecting, and its MAX485 chip also all accesses the RS-485 bus.

Further technical scheme is: described relay is normally closed relay.

Further technical scheme is: the electrode part of described LED driving power access led light source.

The utility model provides a kind of LED control system by the automatic writing address of RS-485 bus on the other hand, comprise at least two above-mentioned LED control driver elements in the described control system, and in the Switching Power Supply series connection access power line of LED control driver element inside, the power line of the LED control driver element internal switch power supply that the Switching Power Supply access is adjacent is provided with relay.

Above-mentioned further technical scheme is: described relay is normally closed relay.

Compared with prior art, one of the beneficial effects of the utility model are: be arranged by power line and RS-485 bus are divided, so that the RS-485 bus is fully independent, increased the antijamming capability when the DMX512 controller is controlled driver element writing address information to LED, and realize need not on LED control driver element, to be equipped with separately address wire by the RS-485 bus, just can be successively to the automatic writing address of a plurality of LED control driver elements, and simple to operate, simultaneously a kind of LED control structure of driving unit by the automatic writing address of RS-485 bus provided by the utility model is simple, is suitable under the DMX512 control protocol carrying out brightness adjustment control to LED control driver element writing address and to the LED light fixture of its access by it.

Description of drawings

Fig. 1 is for being used for the cellular construction block diagram of an embodiment of explanation the utility model;

Fig. 2 is for being used for the system architecture diagram of another embodiment of explanation the utility model.

Embodiment

Below in conjunction with accompanying drawing the utility model is further elaborated.

Described with reference to figure 1, an embodiment of the present utility model is a kind of LED control driver element by the automatic writing address of RS-485 bus, comprise Switching Power Supply, single-chip microcomputer and LED driving power, described Switching Power Supply access power line, and described single-chip microcomputer accesses respectively Switching Power Supply and LED driving power, on the power line of Switching Power Supply access, also be provided with relay, and relay access single-chip microcomputer; Also be provided with the RS-485 signal processing module on driver element, the RS-485 signal processing module accesses respectively single-chip microcomputer and Switching Power Supply, and the RS-485 signal processing module also accesses the RS-485 bus.

According to another embodiment of the present utility model, at least comprise the MAX485 chip in the above-mentioned RS-485 signal processing module, and the MAX485 chip accesses respectively Switching Power Supply, single-chip microcomputer and RS-485 bus, and the differential signal that the MAX485 chip will come from the RS-485 bus is converted into level signal and exports in the single-chip microcomputer and process.

It is identical a plurality of that another preferred embodiment that the utility model is used for the technical solution problem is that the above-mentioned LED control driver element of mentioning is set to, and the Switching Power Supply of their inside access power line of all connecting, and its MAX485 chip also all accesses the RS-485 bus.

According to another embodiment of the present invention, above-mentioned relay is for preferably adopting normally closed relay, and is closed immediately again after namely it disconnects moment in Single-chip Controlling, is conducive to the instantaneous conducting of circuit in the LED control driver element; And LED control driver element in actual use, and the LED driving power then accesses the electrode part of LED light fixture.

With reference to shown in Figure 2, similar with above-mentioned several embodiment, the another kind of embodiment of the utility model is a kind of LED control system by the automatic writing address of RS-485 bus, comprise at least two LED control driver elements among above-mentioned several embodiment in the described control system, and in the Switching Power Supply series connection access power line of LED control driver element inside, the power line of the LED control driver element internal switch power supply that the Switching Power Supply access is adjacent is provided with relay.And similar with above-mentioned several embodiment, above-mentioned relay also adopts normally closed relay.

Again with reference to shown in Figure 2, the utility model in actual use, the DMX512 controller to the process that a plurality of LED control driver element writing address in the LED control system of the automatic writing address of RS-485 bus carry out brightness adjustment control is: when system access AC220, each LED control driver element (it accesses led light source) in the system all powers on, because relay K 1, K2, K3 is normally closed relay, this moment, the DMX controller sent the order of a preparation write address by the RS-485 bus, after the single-chip microcomputer of each LED control driver element receives orders, drive by its IO mouth, the instantaneous disconnection of control relay K1, at this moment, except the power supply energising of the control of the LED in system driver element, the equal power down of all the other LED control driver elements, quit work, this moment, the DMX controller sent address code by the RS-485 bus again, was received by LED control driver element, and by single-chip microcomputer address code was stored in its internal or external storage device.Then control relay K1 is closed again for single-chip microcomputer, at this moment, the 2nd LED control driver element 2 in the system, the 3rd LED controls driver element until N LED control driver element switched on again, (its reason is the characteristic of normally closed relay, closed immediately again behind the previous instant power-down), this moment, the RS-485 bus was sent again the preparation writing address signal, at this moment, except LED control driver element, the LED control driver element of back is all disconnected by the Single-chip Controlling relay again, the energising of the 2nd LED control this moment driver element, the equal power down of LED control driver element of back, RS-485 bus are again to the 2nd LED control driver element writing address, in this way, can be successively to the 3rd LED control driver element, the 4th LED control driver element is until N LED control driver element writing address.

And above-mentioned RS-485 bus is after LED control driver element writing address, when it receives the order of the preparation write address that comes from the DMX controller again, single-chip microcomputer no longer control relay disconnects, this function realizes by software, its detailed process is as follows: in LED control driver element Single Chip Microcomputer (SCM) program a flag bit is arranged, when flag bit is 1, being defined as can writing address, and can receive and prepare write address information and response, when flag bit is 0, then forbid write address, at this moment, signal on the RS-485 bus is invalid to this type of LED control driver element, need to prove, flag bit all can reset to 1 when LED control driver element powers at every turn.

Power up: the flag bit when powering in the LED control driver element Single Chip Microcomputer (SCM) program is 1, and each LED control driver element in the system can receive the preparation writing address signal of RS-485 bus and respond at this moment.

Prepare the write address process: sent by the RS-485 bus and prepare the writing address signal, after this moment, each LED control driver element was received this signal.All relays all disconnect, and at this moment, except the LED control driver element of direct access power line, other LED control driver element all is in off-position

Control the driver element writing address to a LED: at this moment, sent the address code of LED control driver element by the RS-485 bus, after the address writes, its single-chip microcomputer is with relay K 1 closure, and change self flag bit into 0, before its power supply disconnects, no longer the signal in the RS-485 bus to be made correspondingly, other LED control driver element in this moment system re-powers.

The 2nd LED is controlled the driver element writing address: because the flag bit of the rear slave that powers on all is 1 at every turn, this moment, the 2nd LED control driver element and all LED control driver element flag bits afterwards all were 1, when the RS-485 bus is sent again preparation writing address signal, the LED control driver element of second and back all disconnects relay after receiving signal, at this moment, the LED control driver element that the access power line powers on only has first and second, the RS-485 bus is sent the address signal of the 2nd LED control driver element again, because LED control driver element had been written into the address, flag bit is 0, RS-485 writing address invalidating signal, only having the 2nd LED control driver element to receive signal just can respond, and the address write, change flag bit into 0 after writing, and closing relay K2.

Successively the 3rd LED control driver element, the 4th LED are controlled driver element until N LED control driver element writing address according to aforementioned process again.

In addition, also need to prove, " embodiment " who speaks of in this manual, " another embodiment ", " embodiment ", etc., refer to specific features, structure or the characteristics described in conjunction with this embodiment and be included among at least one embodiment that the application's generality describes.A plurality of local appearance statement of the same race is not necessarily to refer to same embodiment in specification.Furthermore, when describing a specific features, structure or characteristics in conjunction with arbitrary embodiment, what advocate is to realize that in conjunction with other embodiment this feature, structure or characteristics also drop in the scope of the present utility model.

Although with reference to a plurality of explanatory embodiment of the present utility model the utility model is described here, but, should be appreciated that, those skilled in the art can design a lot of other modification and execution modes, and these are revised and execution mode will drop within the disclosed principle scope and spirit of the application.More particularly, in the scope of, accompanying drawing open in the application and claim, can carry out multiple modification and improvement to building block and/or the layout of subject combination layout.Except modification that building block and/or layout are carried out with improving, to those skilled in the art, other purposes also will be obvious.

Claims

1. the LED by the automatic writing address of RS-485 bus controls driver element, comprise Switching Power Supply, single-chip microcomputer and LED driving power, described Switching Power Supply access power line, and described single-chip microcomputer accesses respectively Switching Power Supply and LED driving power, it is characterized in that: also be provided with relay on the power line of described Switching Power Supply access, and relay access single-chip microcomputer; Also be provided with the RS-485 signal processing module on the described driver element, the RS-485 signal processing module accesses respectively single-chip microcomputer and Switching Power Supply, and the RS-485 signal processing module also accesses the RS-485 bus.

2. the LED by the automatic writing address of RS-485 bus according to claim 1 controls driver element, it is characterized in that: comprise at least the MAX485 chip in the described RS-485 signal processing module, and the MAX485 chip accesses respectively Switching Power Supply, single-chip microcomputer and RS-485 bus.

3. the LED by the automatic writing address of RS-485 bus according to claim 2 controls driver element, it is characterized in that: described LED control driver element is identical a plurality of, and the Switching Power Supply of their inside access power line of all connecting, its MAX485 chip also all accesses the RS-485 bus.

4. according to claim 1 or 3 described LED control driver elements by the automatic writing address of RS-485 bus, it is characterized in that: described relay is normally closed relay.

5. it is characterized in that: the electrode part of described LED driving power access led light source according to claim 1 or 3 described LED control driver elements by the automatic writing address of RS-485 bus.

6. LED control system by the automatic writing address of RS-485 bus, it is characterized in that: comprise the LED control driver element described at least two claims 1 to 5 in the described control system, and in the Switching Power Supply series connection access power line of LED control driver element inside, the power line of the LED control driver element internal switch power supply that the Switching Power Supply access is adjacent is provided with relay.

7. the LED by the automatic writing address of RS-485 bus according to claim 5 controls driver element, and it is characterized in that: described relay is normally closed relay.