CN202750294U

CN202750294U - Circuit automatically writing in DMX512 address

Info

Publication number: CN202750294U
Application number: CN 201220429436
Authority: CN
Inventors: 樊邦扬
Original assignee: Heshan Lide Electronic Enterprise Co Ltd
Current assignee: Heshan Lide Electronic Enterprise Co Ltd
Priority date: 2012-08-27
Filing date: 2012-08-27
Publication date: 2013-02-20
Anticipated expiration: 2022-08-27

Abstract

The utility model provides a circuit automatically writing in DMX512 addresses, and the circuit comprises: a direct current voltage stabilizing circuit providing work voltage for later stage circuits; a DMX512 signal receiving circuit connected with the direct current voltage stabilizing circuit, and the DMX512 signal receiving circuit is used for receiving external signal input; a high speed electronic switch connected with the direct current voltage stabilizing circuit and the DMX512 signal receiving circuit, and the high speed electronic switch has a conduction or cut off state switching function; a DMX 512 decoding control circuit connected with the direct current voltage stabilizing circuit and the DMX512 signal receiving circuit, and the DMX512 decoding control circuit can control the DMX512 to switch from data reception state to address reception state through conduction or cut off of the high speed electronic switch; and a DMX512 signal transmitting circuit connected with the direct current voltage stabilizing circuit and the high speed electronic switching circuit, and the DMX512 signal transmitting circuit can revert received signals to differential signals and the differential signals are transmitted to a later stage light fixtures. The circuit automatically writing in DMX512 addresses can automatically set all DMX512 light fixture addresses on a signal subcircuit in one time according to connecting sequence of the light fixtures.

Description

A kind of DMX512 address circuit that automatically writes

Affiliated technical field

The utility model relates to a kind of circuit for setting the address, relates in particular to a kind of circuit to DMX512 light fixture automatic setting address.

Background technology

The DMX512 agreement is a kind of light of stage control protocol that U.S. arenas technological associations issued in 1986, has now become a kind of international standard agreement, is widely used in various lamp light control systems.The DMX512 light fixture all is to go to receive the data that the DMX512 controller sends with different addresses, thereby realizes the demonstration of scene effect.But normally settling button to regulate the address at light fixture aspect the light fixture address setting, or carrying out separate unit light fixture writing address with the write address device, these methods are so that people consume a large amount of time and human resources.Therefore, seek a kind of DMX512 light fixture addressing method of simple and fast, become these those skilled in the art's research direction.

The utility model content

In order to overcome the deficiencies in the prior art, the purpose of this utility model be to provide a kind of can be disposable automatically and set the circuit of all DMX512 light fixture addresses on the bars branch road according to the light fixture order of connection.On the DMX512 light fixture, can realize quickly and easily the setting of DMX512 light fixture address to described circuit application.

The utility model patent for achieving the above object used technical scheme is: a kind of DMX512 address circuit that automatically writes is characterized in that: be included as the direct current regulation circuit that late-class circuit provides operating voltage; Be connected with described direct current regulation circuit and be used for receiving the DMX512 signal receiving circuit of external signal input; Be connected with described direct current regulation circuit and DMX512 signal receiving circuit and have the high speed electronic switch of conducting or cut-off state handoff functionality; Be connected with described direct current regulation circuit and DMX512 signal receiving circuit and the conducting by high speed electronic switch or cut-off are controlled the DMX512 decoding control circuit that its DMX512 data receiving state and address accepting state are switched; Be connected with described direct current regulation circuit and high speed electronic switch circuit and the signal that receives is reduced into differential signal, and export to the DMX512 signal sending circuit of next stage light fixture.

Further, described high speed electronic switch circuit be core parts be can scope for+7.5V～+ switching regulator IC of the input voltage stable output of 24V+5V voltage.

Further, the core parts of described DMX512 signal receiving circuit are the high speed photo coupling chips that differential signal can be converted to the output of TTL signal.

Further, the memory of the microcontroller processor inside of described DMX512 decoding control circuit is EEPROM (Electrically Erasable Programmable Read Only Memo) (EEPROM).

The beneficial effects of the utility model are: by the circuit of automatic setting address all is set in every desk lamp tool, so that every desk lamp tool can receive a DMX512 address and can automatically add 1 on its number of addresses that receives, and the number of addresses result sent to next desk lamp tool according to the write address agreement, thereby can realize disposable automatically and set in order the address of all DMX512 light fixtures on the bars branch road.Simultaneously, the internal storage of the microcontroller processor of storage light fixture address adopts EEPROM, to the modification of address, has realized saving human cost and the purpose of time after can also making things convenient for.

Description of drawings

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.

Fig. 1 is the circuit block diagram of the utility model embodiment.

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

Fig. 3 is the circuit working flow chart of the utility model embodiment.

Embodiment

Below be automatically to write the explanation of DMX512 address circuit detailed functions and the course of work to the utility model is a kind of:

With reference to Fig. 1, Fig. 1 is the circuit block diagram of this usefulness new embodiment, and direct current regulation circuit 1 provides+the 5V operating voltage for every sub-control circuit of rear class; DMX512 signal receiving circuit 2 is input to the signal that receives on DMX512 decoding control circuit 3 serial ports, DMX512 decoding control circuit 3 will be decoded and be received the signal of coming, distinguishing is data, or number of addresses, decide conducting and the cut-off of control high speed electronic switch circuit 4, the conducting state of high speed electronic switch circuit 4, belong to the DMX512 data receiving state, the signal that exactly DMX512 signal receiving circuit 2 is received directly is delivered to the DMX512 signal sending circuit and exports to the next stage light fixture through high speed electronic switch circuit 4; The cut-off state of high speed electronic switch circuit 4, belong to DMX512 address accepting state, disconnect exactly the signal path of DMX512 signal receiving circuit 2 and DMX512 signal sending circuit 5, the number of addresses that receives is deposited in the internal storage of microcontroller by DMX512 decoding control circuit 3, then number of addresses adds 1 automatically, sends to DMX512 signal sending circuit 5 and exports to the next stage light fixture according to the write address agreement.5 of DMX signal sending circuits are responsible for the signal that receives is reduced into differential signal output.

With reference to Fig. 2, Fig. 2 is the schematic diagram of the utility model embodiment, the differential signal input is from the J port one input of DMX512 signal receiving circuit 2, the current-limiting protection resistance R 1 of flowing through, enter again high speed photo coupling chip U1, current-limiting protection resistance R 1 is the current-limiting protection resistance of the inner LED of high speed photo coupling chip U1, high speed photo coupling chip U1 is by inner opto-electronic conversion, the differential signal of input is converted to the Transistor-Transistor Logic level signal of single line, C1 is anti-interference capacitor, this electric capacity should be near the power input (the 5th, 8 pin) of high speed photo coupling chip U1 when practical layout, and R2 is pull-up resistor; The U2 of high speed photo coupling chip U1 output Transistor-Transistor Logic level signal in the DMX512 decoding control circuit 3, U2 is 8 single-chip microcomputers among Fig. 2, built-in control program, it comprises DMX512 data receiver program, light fixture address reception program, DMX512 address add 1 transmission program, and the DMX512 data broadcast sends program, data and address receiving key control program, dynamic effect change program and PWM modulation output program.8 Transistor-Transistor Logic level signals that single-chip microcomputer U2 sends over high speed photo coupling chip U1, decode, as meet DMX512 data receiver agreement, then the U3 of 8 single-chip microcomputer U2 the 7th pin output high level control high speed electronic switchs 4 is in conducting state, allow the DMX512 data-signal directly enter the receiving terminal (the 4th pin) of the difference transceiver U4 of DMX512 signal sending circuit 5, simultaneously the data that receive are carried out the PWM modulation treatment, control the tonal gradation of LED; Receive agreement if meet the DMX512 address, then 8 single-chip microcomputer U2 the 7th pin output low level control high speed electronic switch U3 are in cut-off state, and the number of addresses that receives added 1 automatically, export to again the receiving terminal (the 4th pin) of the difference transceiver U4 of DMX512 signal sending circuit 5 according to the write address agreement.Difference transceiver U4 only need to convert the signal of receiving terminal (the 4th pin) to differential signal, exports to next stage DMX512 light fixture.Next stage DMX512 light fixture carries out signal according to the above-mentioned course of work equally to be processed.

With reference to Fig. 3, Fig. 3 is the workflow diagram of the utility model embodiment, when circuit receives external control signal, carrying out in advance agreement differentiates, if not the write address order, then carry out other control command or do not carry out, otherwise output signal control high speed electronic switch 4 is in cut-off state, parallel bus is cut off, signal line is transformed to the serial state, takes out the DMX number of addresses according to the write address agreement simultaneously, is saved among the inside EEPROM of 8 single-chip microcomputer U2, and the register of temporary this address of renewal, after writing successfully, the light fixture red-light LED is done flicker and is changed, and expression is write the location and finished, simultaneously the DMX512 number of addresses is added 1, send according to the write address agreement again.After the address sent, output signal control high speed electronic switch 4 was in conducting state again, signal line is transformed to parallel state, so that follow-up DMX512 data receiver.

Above-described embodiment is a specific embodiment of the present utility model; after the scope of the utility model protection should comprise that those of ordinary skill in the art reads the utility model file, need not creative mental labour according to the technical solution of the utility model and technical conceive and make other various corresponding conversion scheme.

Claims

1. one kind writes the DMX512 address circuit automatically, it is characterized in that: be included as the direct current regulation circuit that late-class circuit provides operating voltage; Be connected with described direct current regulation circuit and be used for receiving the DMX512 signal receiving circuit of external signal input; Be connected with described direct current regulation circuit and DMX512 signal receiving circuit and have the high speed electronic switch of conducting or cut-off state handoff functionality; Be connected with described direct current regulation circuit and DMX512 signal receiving circuit and the conducting by high speed electronic switch or cut-off are controlled the DMX512 decoding control circuit that its DMX512 data receiving state and address accepting state are switched; Be connected with described direct current regulation circuit and high speed electronic switch circuit and the signal that receives is reduced into differential signal, and export to the DMX512 signal sending circuit of next stage light fixture.

2. a kind of DMX512 address circuit that automatically writes according to claim 1 is characterized in that: described high speed electronic switch circuit be core parts be can scope for+7.5V～+ switching regulator IC of the input voltage stable output of 24V+5V voltage.

3. a kind of DMX512 address circuit that automatically writes according to claim 2 is characterized in that: the core parts of described DMX512 signal receiving circuit are the high speed photo coupling chips that differential signal can be converted to the output of TTL signal.

4. according to claim 1 to 3 each described DMX512 address circuits that automatically write, it is characterized in that: the memory of the microcontroller processor inside of described DMX512 decoding control circuit is EEPROM (Electrically Erasable Programmable Read Only Memo) (EEPROM).