CN201181518Y - A wireless remote control device with multi-transmit and multi-receive - Google Patents

Abstract

The utility model relates to a multi-transmission and multi-reception wireless remote control device, which belongs to the field of electrical remote control equipment and is composed of multiple remote controllers and receivers. The remote controller can be used by hand and moves, and includes a switch group circuit, a transmitting single-chip microcomputer circuit and a radio frequency transmitting circuit. The transmitting single-chip microcomputer and the radio frequency transmitter integrated chip are used for control coding and radio frequency modulation transmission; the receiver is located at the controlled electrical appliance, and each A receiver controls an electrical appliance, which is composed of a radio frequency receiver circuit, a receiving single-chip microcomputer circuit and an AC circuit. The radio frequency receiver and the receiving single-chip microcomputer integrated chip are used for radio frequency receiving demodulation and decoding, thereby realizing the remote control of the controlled electrical appliance. The communication code of the utility model adopts 24-bit Manchester code, the communication protocol adopts the way of code division multiple access, the modulation mode is frequency offset keying, and the modulation carrier frequency is 434 MHz, which improves the anti-interference ability and realizes one-to-many or many One-to-one remote control function, used for wireless remote control of electrical appliances.

Description

A wireless remote control device with multi-transmit and multi-receive

technical field

The utility model belongs to the field of electric remote control equipment, in particular to a wireless remote control device for multi-transmission and multi-reception.

Background technique

General electrical equipment (such as lamps) is installed in such a way that the switch is installed in a fixed position and communicated with the electrical appliance through a long wire. The disadvantages of this traditional method are: the wiring of wires is complicated, and the cost of wiring changes is high; the switch operation must be performed at a fixed position, which is inconvenient to use at night or for the disabled; at the same time, it is difficult to realize multiple controllers to control the same electrical appliance. In recent years, some remote-control electric appliance control patents such as "A Remote Controller for Lamps" (Patent No. 02200737.7) are used to solve the above problems. The disadvantage is that the communication method is simple and the anti-interference ability is insufficient; at the same time, there are too few controllable targets, which is not conducive to industrial production.

Utility model content

The purpose of the utility model is to overcome the shortcomings of poor anti-interference ability and too few control targets of the electric remote control device, and provide a multi-transmit and multi-receive wireless remote control device, which is characterized in that: the multi-transmit and multi-receive wireless remote control device consists of 30) identical remote controllers and M (M: 1 to 30) receivers, N identical remote controllers are used by different people or at different locations, and each receiver controls a controlled electrical appliance. The remote controller includes a switch group circuit 1, a transmitting single-chip microcomputer circuit 2, a radio frequency transmitting circuit 3 and a power supply 4; the switch group circuit 1 includes an alignment switch of a remote controller and control switches of L (L: 10-30) remote control appliances, each A control switch corresponds to a receiver, and the transmitting single-chip circuit 2 includes the programming interface of the transmitting single-chip MC1 and the single-chip microcomputer. The radio frequency transmitting circuit 3 is composed of a radio frequency transmitter MC2, a crystal oscillator, a bias circuit, a buffer amplifier and a printed antenna APCB, and the bias circuit includes A frequency-selective filter circuit composed of a filter capacitor and a resistor capacitor, the power supply 4 includes a battery and a voltage stabilizing circuit; the switch group circuit 1 is connected to the input port of the transmitting single-chip microcomputer MC1, and the data output port of the transmitting single-chip microcomputer MC1 and the data input port of the radio frequency transmitter MC2 Connected, the programming interface circuit of the single-chip microcomputer is connected to the computer programmer in the programming stage for downloading the single-chip microcomputer program; the radio frequency output port of the radio frequency transmitter MC2 is connected to the printed antenna APCB; the clock signal end of the radio frequency transmitter MC2 is connected to the input end of the buffer amplifier, and the buffer amplifier The output terminal is connected to the encoding clock input terminal of the transmitting single-chip microcomputer MC1; the battery is connected to the input terminal of the voltage stabilizing circuit, and the output terminal of the voltage stabilizing circuit is connected to the power supply terminals of the transmitting single-chip microcomputer circuit 2 and the radio frequency transmitting circuit 3 to provide DC power.

The receiver includes a radio frequency receiver circuit 5, a receiving single-chip microcomputer circuit 6 and an AC circuit 7; the radio frequency receiver circuit 5 is composed of an antenna ANL, a resonant circuit, a radio frequency receiver IC1, a crystal oscillator and a peripheral bias circuit; the receiving single-chip microcomputer circuit 6 is composed of an integrated The receiving single chip microcomputer AW1 and its serial SPI interface, an alignment switch, an indicating circuit and a triode switch are composed, and the AC circuit 7 includes a power circuit and an electromagnetic relay. The antenna ANL is connected to the input terminal of the resonant circuit, the output terminal of the resonant circuit is connected to the RF input terminal of the RF receiver IC1, the output terminal of the RF receiver IC1 is connected to the serial SPI interface of the receiving microcontroller AW1, and the output terminal of the receiving microcontroller AW1 is connected to The input terminal of the triode switch circuit is connected with the excitation coil of the electromagnetic relay in the AC circuit 7, and the control contact of the electromagnetic relay is connected with the controlled electrical appliance. The power circuit of the AC circuit 7 provides DC power for the whole receiver.

The transmitting single-chip microcomputer MC1, radio frequency transmitter MC2, radio frequency receiver IC1, receiving single-chip microcomputer AW1 and its serial SPI interface all use CMOS integrated chips.

The transmitting single-chip microcomputer MC1 and the receiving single-chip microcomputer AW1 integrated circuit encode the baseband signal as Manchester coding, the modulation mode of the transmitting single-chip microcomputer MC2 is frequency offset keying, and the modulation carrier frequency is 434 MHz.

The communication protocol of the radio frequency transmitter MC2 and the radio frequency receiver IC1 adopts the mode of code division multiple access, and each control switch of the remote control transmitter is assigned a unique 24-bit address code to control a receiver identical to this address code , So, one receiver can respond to multiple remote control transmitters; at the same time, one remote control can also control multiple receivers separately.

The receiver has the function of automatically aligning the address code, and does not need to write software or other external ways to write the address code into the receiver. Both the remote control transmitter and the receiver have an alignment switch, and the radio frequency transmitting/receiving circuit has an address code specially assigned for the receiver to receive the address code of the electrical control switch of the remote control to complete the alignment of the receiver address code.

The beneficial effects of the utility model:

1. Adopt integrated transmitter and integrated receiver, use baseband Manchester coding, frequency shift keying and other modulation methods to increase communication reliability and reduce misoperation caused by electromagnetic interference; remote control operation distance can reach 100 meters, realizing long-distance remote control .

2. Adopt the open radio frequency frequency of 434 MHz in the radio national standard, which reduces the electromagnetic interference to other electronic equipment.

3. Using the code division multiple access method, the control switch of each remote control appliance on the remote controller corresponds to a 24-bit unique address code, and at the same time assigns a 24-bit address code to each receiver, the control switch can be remotely controlled with its address Receivers with the same code to control appliances. This makes it possible to have multiple receivers and multiple remote controllers in the system, and multiple identical remote controllers can be used to control the same electrical appliance, and at the same time, each remote controller can also control multiple different electrical appliances. The system can accommodate up to about 16,000,000 receivers, meeting the requirements of industrial production.

4. The remote control and receiver have an alignment switch, and the internal software settings allow the operator to set the address code of the receiver to automatically align with the address code of any control switch on the remote control, making the address code setting operation simple and accurate, and the system has a strong flexibility.

5. All adopt CMOS integrated chips, the system size is small, the power consumption is low, and the service life is long.

Description of drawings

Fig. 1 is a structural block diagram of the utility model system

Fig. 2 is the functional block diagram of the utility model remote controller

Fig. 3 is the functional block diagram of the utility model receiver

Detailed ways

Fig. 1 is a block diagram of the system structure of the embodiment. The whole remote control device is composed of 6 remote controllers and 10 receivers. Each remote controller is powered by a battery and can be held or fixed in a suitable position. Each receiver controls a corresponding controlled electrical appliance. The receiver can be installed in or near the corresponding controlled electrical appliance. Each remote control can control all the receivers in the device, thereby controlling the controlled electrical appliance to run or stop. .

Fig. 2 is the schematic block diagram of the remote controller of the present embodiment, and the remote controller includes a switch group circuit 1, a transmitting single-chip microcomputer circuit 2, a radio frequency transmitting circuit 3 and a power supply 4; Standard switch and 10 control switches, in order to expand the number of switches, input and output expansion chips can be selected, the switch group circuit 1 is connected to the input port of the transmitting single-chip microcomputer MC1; the transmitting single-chip microcomputer MC1 forms a corresponding data packet after responding to the control switch, and input The radio frequency transmitting circuit 3 transmits. The radio frequency transmitting circuit 3 includes a radio frequency transmitter MC2, a crystal oscillator, a bias circuit and a printed antenna APCB. In addition, the radio frequency transmitter MC2 chip will generate a synchronous clock pulse, and output an encoding clock to the transmitting microcontroller MC1 through a buffer amplifier. When the control switch is pressed, the transmitting microcontroller MC1 software responds to the action, generates a data packet according to the address code corresponding to the control switch and sends it to the radio frequency transmitting circuit 3, the radio frequency transmitter MC2 chip modulates and sends data to output radio frequency signals, and passes through the printed antenna APCB Coupling and transmitting the radio frequency signal. The battery directly supplies power to the digital circuit of the remote control. The voltage stabilizing circuit is a voltage stabilizing chip. program. The alignment switch of the remote control is used to assign address codes to the controlled appliances. When the button of the alignment switch is pressed, the internal software of the single-chip microcomputer enters the alignment setting mode. At this time, any control switch is pressed, and the address code of the control switch will be received by the receiver that is also in the alignment setting mode. Aim at the set receiver and control the controlled electrical appliances corresponding to the receiver.

Fig. 3 is a schematic block diagram of the receiver of this embodiment. The receiver is composed of a radio frequency receiver circuit 5, a receiving microcontroller circuit 6 and an AC circuit 7; as shown in Figure 3, the radio frequency receiver circuit 5 is composed of an antenna ANL, a resonant circuit, a radio frequency receiver IC1, a crystal oscillator and a peripheral bias circuit. The RF signal is coupled by the antenna ANL to the resonant circuit of the frequency selection of the inductance and capacitance. The RF signal after the frequency selection enters the IC1 chip of the RF receiver. The receiver chip completes the mixing, detection, amplification and demodulation of the Manchester code and then restores the remote control. The transmitted data packet is sent to the receiving single-chip microcomputer AW1 through the general serial interface (SPI); the single-chip microcomputer can set the demodulation mode for the receiving chip through the SPI interface. The receiving single-chip microcomputer AW1 responds to the received data packet, if the address code is the same as the local address code, then the receiving single-chip microcomputer AW1 changes the state of the output port, the output port is connected to the input terminal of the triode switch, and the triode switch controls the electromagnetic relay in the AC circuit 7, Complete the control of the electrical appliance; the receiving single-chip microcomputer circuit 6 also includes an alignment switch, and when the button of the alignment switch is pressed, the internal software of the single-chip microcomputer enters the alignment setting mode, and the received address code is set as a local address code. The LED lights around the microcontroller are used as an indicator circuit to indicate the working status of the receiver circuit. The AC circuit 7 includes two parts, one part is a transformer circuit, including a transformer plug and a voltage stabilizing chip, which provides DC power for the entire receiver, and the system uses a switched capacitor transformer, so that the receiver can be powered by AC mains; the AC circuit also includes an electromagnetic relay , The electromagnetic relay is controlled by the triode switch and is used to cut off or connect the AC circuit of the controlled electrical appliance.

The integrated chip of the whole device adopts CMOS technology, which has low power consumption, small weight and flexible use. Each control switch on the remote controller corresponds to a 24-bit unique address code. At the same time, each receiver is assigned a 24-bit address code. Each control switch can remotely control the receiver with the same address code to control the controlled electrical appliance . One receiver can respond to the commands sent by the control switches with the same address code on different remote controllers, so different operators can use multiple identical remote controllers to control the same electrical appliance. At the same time, since there are multiple control switches on each remote controller to control receivers corresponding to different address codes, the same operator can also control multiple different electrical appliances. Using a 24-bit address code, the system can accommodate up to 16,000,000 receivers, which can not only meet the requirements of industrial production, but also avoid cross-interference between adjacent devices.

Claims (4)

1. A wireless remote control device with multiple sending and multiple receiving is characterized in that, the multi-controller remote control device is made up of N identical remote controllers and M receivers; The remote controller is composed of a switch group circuit (1), a transmitting single-chip microcomputer circuit (2), a radio frequency transmission circuit (3) and a power supply (4); the switch group circuit (1) is an alignment switch and L of a remote controller A control switch of a remote control electrical appliance; the transmitting single-chip microcomputer circuit (2) includes the programming interface of transmitting the single-chip microcomputer MC1 and the single-chip microcomputer; the radio frequency transmitting circuit (3) is made of radio frequency transmitter MC2, crystal oscillator, bias circuit, buffer amplifier and printed antenna APCB; power supply (4) comprising battery and voltage stabilizing circuit; Switch group circuit (1) links to each other with the input port of transmitting single-chip microcomputer MC1, and the data output port of transmitting single-chip microcomputer MC1 links to each other with the data input port of radio frequency transmitter MC2, and the programming interface of single-chip microcomputer connects computer programming The radio frequency output port of the radio frequency transmitter MC2 is connected to the printed antenna APCB; the clock signal end of the radio frequency transmitter MC2 is connected to the input end of the buffer amplifier, and the output end of the buffer amplifier is connected to the encoding clock input end of the transmitting microcontroller MC1; Described receiver is made up of radio frequency receiver circuit (5), receives single-chip microcomputer circuit (6) and AC circuit (7); Described radio frequency receiver circuit (5) is made up of antenna ANL, resonant circuit, radio frequency receiver IC1, crystal oscillator and The peripheral bias circuit is formed; the receiving single-chip microcomputer circuit (6) is composed of the integrated receiving single-chip microcomputer AW1 and its SPI interface, alignment switch, indicating circuit and triode switch; the AC circuit (7) includes a power supply circuit and an electromagnetic relay; the antenna ANL and the resonant circuit The input terminal is connected, the output terminal of the resonant circuit is connected to the RF input terminal of the RF receiver IC1, the output terminal of the RF receiver IC1 is connected to the serial SPI interface of the receiving microcontroller AW1, and the output terminal of the receiving microcontroller AW1 is connected to the input of the triode switch circuit terminal, the triode switch circuit is connected with the excitation coil of the electromagnetic relay in the AC circuit (7), and the control contact of the electromagnetic relay is connected with the controlled electrical appliance. 2 . The multi-transmission and multi-reception wireless remote control device according to claim 1 , wherein the L is 10-30. 3 . 3. A wireless remote control device with multiple transmission and multiple reception according to claim 1, characterized in that, said M is 1 to 30 4 . The multi-transmission and multi-reception wireless remote control device according to claim 1 , wherein said N is 1-30.

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