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Automobile remote-control system with mixed signal circuit and system algorithm thereof

A car remote control and mixed signal technology, which is applied in the direction of signal transmission system, transmission system, electrical components, etc., can solve the problems of low sensitivity, small effective distance, large battery loss, etc., to eliminate large environmental impact, increase effective distance, improve The effect of using time

Active Publication Date: 2012-11-28
CHERY AUTOMOBILE CO LTD
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AI Technical Summary

Problems solved by technology

[0004] Because government regulations limit the maximum transmission power of the transmitter, and the effective distance of the remote control is affected by the transmission power and receiver sensitivity, the effective range of the wireless transmission device cannot be increased without limit; and based on the surface acoustic wave resonator (SAW) The initial frequency accuracy of the RF transmitter on the board is very poor, and its frequency error range is about ±150 kHz. At the same time, its frequency is greatly affected by temperature, which leads to a large compensation of the carrier frequency of the transmitter, which in turn forces the receiver to have a relatively large frequency. wide channel filter
The large bandwidth makes unnecessary noise enter the system, thereby reducing the overall sensitivity and transmission distance, that is, there are the following technical problems in the prior art: the effective distance of the existing remote control device is small, the sensitivity is low and the battery loss is large

Method used

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  • Automobile remote-control system with mixed signal circuit and system algorithm thereof
  • Automobile remote-control system with mixed signal circuit and system algorithm thereof

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Embodiment Construction

[0035] The present invention will be described in detail below according to the accompanying drawings, which is a preferred embodiment among various implementations of the present invention.

[0036] 1. Improve the stability of remote control transmission frequency and the effective distance of remote control:

[0037] The mixed-signal remote control system includes two parts: a remote transmitter and a remote receiver.

[0038] The block diagram of the circuit structure of the remote control transmitter is as follows: figure 1 As shown, it includes button battery 10 , button 20 , MCU 30 , phase lock circuit 40 , crystal oscillator 50 , radio frequency transmitting circuit 60 and antenna 70 . The button battery 10 is responsible for providing power to all devices. The MCU 30 detects the state of the button 20. When the MCU 30 receives the switch signal of the button 20, it sends the corresponding switch code information to the phase-locking circuit 40. The phase-locking circu...

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Abstract

The invention relates to an automobile remote-control system with a mixed signal circuit and a system algorithm thereof. The automobile remote-control system comprises a remote-control emitter and a remote-control receiver, wherein the remote-control emitter comprises a micro control unit (MCU), a phase lock circuit, a crystal oscillator and a radio-frequency emission circuit, the micro control unit (MCU) is used for transmitting switching code information to the phase lock circuit, the phase lock circuit is used for transmitting the information to the radio-frequency emission circuit, and the radio-frequency emission circuit is used for feeding back signals to the phase lock circuit and / or transmitting the signals outwards.

Description

technical field [0001] The invention relates to an automobile wireless remote control system, in particular to an automobile remote control system with a mixed signal circuit and its system algorithm. By using a mixed signal sending and receiving circuit, the remote control receiving performance can be improved, the transmission distance can be extended, the battery life can be increased, and the portability can be reduced. device size, etc. Background technique [0002] At present, short-distance wireless transmission technology has been widely used in many daily life applications, such as remote keyless entry (RKE), tire pressure monitoring system (TPMS), car anti-theft device, remote control, garage door remote control switch and many other through radio to remote control products. [0003] The frequency band of the above-mentioned wireless transmission application is located between 260-470MHz, which belongs to the ultra-high frequency (UHF) frequency band without a lic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G08C17/02H04B1/04H04B1/16
Inventor 张一强李建才
Owner CHERY AUTOMOBILE CO LTD
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