CN101894453B - Automobile remote-control system with mixed signal circuit and system algorithm thereof - Google Patents
Automobile remote-control system with mixed signal circuit and system algorithm thereof Download PDFInfo
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- CN101894453B CN101894453B CN2010101963465A CN201010196346A CN101894453B CN 101894453 B CN101894453 B CN 101894453B CN 2010101963465 A CN2010101963465 A CN 2010101963465A CN 201010196346 A CN201010196346 A CN 201010196346A CN 101894453 B CN101894453 B CN 101894453B
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- 239000013078 crystal Substances 0.000 claims abstract description 13
- 230000005540 biological transmission Effects 0.000 claims description 31
- 230000005059 dormancy Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 230000010355 oscillation Effects 0.000 claims description 5
- 230000002618 waking effect Effects 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 2
- 238000000429 assembly Methods 0.000 claims description 2
- 230000035945 sensitivity Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
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- 238000010897 surface acoustic wave method Methods 0.000 description 1
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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
The present invention relates to the automobile wireless telechirics; Be specifically related to a kind of automobile remote-control system and system algorithm thereof with mixed signal circuit; Through using mixed signal to send and receiving circuit, promote the remote control receptivity, can extend transmission distance; Increase battery life, reduce mancarried device size etc.
Background technology
The short range wireless transmission technology has been widely used in the application of many daily lifes at present, like telecar door switch (RKE), tire pressure monitoring system (TPMS), alarms and security systems for automobiles, telepilot, garage door teleswitch and other many products that come remote control through radio.
Above-mentioned wireless transmission is used the place frequency range between 260-470MHz; Belong to need not licence plate ultrahigh frequency (UHF) frequency range; This type of short range wireless transmission device is to use the conventional analogue radio-frequency technique; Be divided into two parts of transmitter and receiver: transmitter is by button cell, keyswitch, and coding MCU and amplitude shift keying regulator (ASK) are formed; Receiver is made up of analog radio frequency receiver, microcontroller MCU and driving governor.
Because government regulation has limited the maximum transmission power of transmitter, and the coverage of remote control is influenced by emissive power and receiver sensitivity, so the effective range of wireless launcher can not unrestrictedly increase; And it is very poor based on the initial frequency accuracy of the radiofrequency launcher on the SAW resonator (SAW); Its frequency error range is about ± and 150 kilo hertzs; Its frequency temperature influence is very big simultaneously; This causes the transmitter carrier frequency compensation bigger, and then forces receiver to possess the channel filter of broad.Big frequency range makes in the unnecessary noise entering system, and then reduced whole sensitivity and transmission range, and promptly have following technical matters in the prior art: the coverage of existing telechiric device is little, and sensitivity is low and battery loss is big.
Summary of the invention
The object of the present invention is to provide a kind of coverage, battery life that can increase automobile remote-control, reduce the telechirics of product size.
For realizing above-mentioned purpose, the present invention adopts following technical scheme: use the phase-locked loop (PLL) based on crystal oscillator to replace surface acoustic wave transmitter (SAW) in emitter terminals; Use the mixed signal radio frequency receiver of band integrated DSP to replace the analog radio frequency receiver of standard at receiver end; Can know that by above technical scheme the present invention can effectively improve the remote control coverage through change remote-control transmitting signal type and receiving circuit processing scheme; Simultaneously,, can carry out pre-service, can effectively reduce the loss of battery, increase the battery serviceable life of telechirics the signal that receives through the mixed signal radio frequency receiver of integrated DSP; And, therefore can reduce the use of telechirics peripheral circuit device because use integrated device, thus reducing the size of total system, more convenient user carries.
Through phase lock circuitry, detect, adjust the Radio Signal Frequency of transmission repeatedly, make it finally satisfy the frequency requirement of emission; Therefore the receiving circuit bandwidth range of receiver can reduce; To avoid receiving too much noise, guarantee the validity of remote control, improve remote control distance; Radio frequency receiver through band DSP makes the whole receiver most of the time be in the dormant stage, but does not influence operate as normal again, therefore can effectively reduce power consumption, improves the service time of battery.
Concrete technical scheme is following:
A kind of automobile remote-control system with mixed signal circuit; Comprise remote control transmitter and receiver of remote-control sytem, said remote control transmitter comprises microcontroller MCU, phase lock circuitry; Crystal oscillator and radio-frequency transmissions circuit; Said microcontroller MCU is used for the transmit button coded message to phase lock circuitry, and said phase lock circuitry is used to send information to the radio-frequency transmissions circuit, and said radio-frequency transmissions circuit is used to feed back signal to phase lock circuitry and/or outwards sends signal.
Further; Said receiver of remote-control sytem comprises RF receiving circuit, digital demodulator and the car body controller of band DSP, and said RF receiving circuit is used to receive signal; And/or judge whether signal meets that radiofrequency signal receives bandwidth requirement and signal is sent to the digital demodulator of band DSP; The digital demodulator of said band DSP is used to judge whether above-mentioned signal is the radio control signal of this car; Said car body controller is used to receive the signal of the digital demodulator forwarding of being with DSP.
Further, said phase-locked loop is based on crystal oscillator and pass through the crystal oscillator starting of oscillation, thereby the signal frequency that receives is promoted to assigned frequency.
Further, said remote control transmitter further comprises launching uses antenna, and said radio-frequency transmissions circuit is through this antenna transmission radio signal.
Further, said receiver of remote-control sytem further comprises antenna for receiving, and it is used for the radio signal that receives is sent to RF receiving circuit.
Further, said remote control transmitter further comprises button cell and button, and button cell is used for to other assemblies of remote control transmitter power supply being provided, and button is used for sending switching signal to MCU, and this signal is obtained by the state that MCU detects button.
Further, said receiver of remote-control sytem further comprises external loading as required, thereby said external loading is driven by car body controller and carries out work.
The algorithm of above-mentioned band mixed signal circuit automobile remote-control system, remote control transmitter adopts following algorithm steps:
(1) phase lock circuitry is promoted to assigned frequency through after the crystal oscillator starting of oscillation with signal frequency;
(2) phase lock circuitry sends to the radio-frequency transmissions circuit with information;
(3) the radio-frequency transmissions circuit is with the signal back phase lock circuitry;
(4) when signal frequency consistent with signal frequency in the phase lock circuitry, the radio-frequency transmissions circuit will send signal through antenna through wireless system;
(5) signal frequency in signal frequency and phase lock circuitry is inconsistent, then readjusts the frequency of sending signal, through phase lock circuitry, sends to the radio-frequency transmissions circuit once more, repeats above-mentioned proof procedure then.Further, receiver of remote-control sytem adopts following algorithm steps:
1) antenna sends to RF receiving circuit with the radio signal that receives;
2) receive bandwidth requirement when signal frequency meets radiofrequency signal, then send to the digital demodulator of band DSP;
3) digital demodulator of band DSP detects and whether receives radio control signal:
4) when not receiving radio control signal, then the digital demodulator of DSP gets into the low power consumption state of dormancy, waits for and waking up next time;
5), then judge whether it is the radio control signal of this car when receiving radio signal;
6) be the radio control signal of this car when judgement, then be transmitted to car body controller, drive corresponding external loading work by car body controller;
7) when the radio control signal that is not this car, then get into dormant state once more, wait for next time and wake up.
Further; In the step 3): the digital demodulator of band DSP is in the low power consumption state of dormancy; Every 100ms that crosses wakes once to detect whether receive radio control signal up; When receiving undesired signal, be with the digital demodulator of DSP to judge in advance, and can not wake car body controller in advance up and drive external loading.
Compare with present prior art, the present invention can eliminate the unstable big shortcoming affected by environment of traditional analog radiating circuit frequency, and the remote-control transmitting frequency can effectively increase the remote control coverage more accurately; Radio frequency receiver through band DSP can carry out pre-service to received signal simultaneously, can reduce power consumption, improves the service time of battery.
Description of drawings
Fig. 1 is a transmitter circuit structured flowchart of the present invention;
Fig. 2 is an acceptor circuit structured flowchart of the present invention;
Among the figure:
Embodiment
Describe the present invention according to accompanying drawing below, it is a kind of preferred embodiment in the numerous embodiments of the present invention.
1. promote remote-control transmitting frequency stability and remote control coverage:
The mixed signal remote control system comprises remote control transmitter and receiver of remote-control sytem two parts.
Remote control transmitter circuit structure block diagram is as shown in Figure 1, comprises button cell 10, button 20, and MCU 30, phase lock circuitry 40, crystal oscillator 50, radio-frequency transmissions circuit 60 and antenna 70.Button cell 10 is responsible for power supply to all devices being provided; MCU 30 detects the state of buttons 20, receive the switching signal of button 20 as MCU 30 after, the corresponding switch coded message is sent to phase lock circuitry 40; Phase lock circuitry 40 is through after crystal oscillator 50 starting of oscillations; Signal frequency is promoted to assigned frequency, then information is sent to radio-frequency transmissions circuit 60, radio-frequency transmissions circuit 60 can be with signal back phase lock circuitry 40; If signal frequency is consistent with signal frequency in the phase lock circuitry 40, then radio-frequency transmissions circuit 60 will send signal through antenna 70 through wireless system; If the signal frequency in signal frequency and the phase lock circuitry 40 is inconsistent, then readjust the frequency of sending signal, through phase lock circuitry 40, send to radio-frequency transmissions circuit 60 once more, repeat above-mentioned proof procedure then;
Through above-mentioned steps, can effectively guarantee under various environment the stability of the radio frequency that remote control transmitter sends; Therefore the reception bandwidth of receiver of remote-control sytem can be set in a proper bandwidth, to prevent the unnecessary noise receiver of remote-control sytem of entering, influences remote-control sensitivity and remote control coverage;
2. reduce the receiver of remote-control sytem power attenuation;
Figure is as shown in Figure 2 for the receiver of remote-control sytem structural circuit;
If do not receive radio control signal, then get into the low power consumption state of dormancy once more, wait for and waking up next time;
If the radio signal of receiving then judges whether it is the radio control signal of this car;
If judge it is the radio control signal of this car, then be transmitted to car body controller 110, drive 120 work of corresponding external loading by car body controller 110;
If not the radio control signal of this car, then get into dormant state once more, wait for next time and wake up;
In sum; Because the receiver most of the time is to be in the dormant stage; Even when receiving undesired signal; Also judge in advance, and can not wake car body controller 100 in advance up and drive external loading 120, therefore can effectively reach the purpose that reduces power consumption by the digital demodulator 100 of band DSP.
Combine accompanying drawing that the present invention has been carried out exemplary description above; Obviously the concrete realization of the present invention does not receive the restriction of aforesaid way; As long as the various improvement of having adopted method design of the present invention and technical scheme to carry out; Or directly apply to other occasion without improvement, all within protection scope of the present invention.
Claims (3)
1. the system algorithm with the mixed signal circuit automobile remote-control system is characterized in that, the automobile remote-control system of this band mixed signal circuit; Comprise remote control transmitter and receiver of remote-control sytem, said remote control transmitter comprises microcontroller MCU, phase lock circuitry; Crystal oscillator and radio-frequency transmissions circuit, said microcontroller MCU are used for the transmit button coded message to phase lock circuitry, and said phase lock circuitry is used to send information to the radio-frequency transmissions circuit; Said radio-frequency transmissions circuit is used to feed back signal to phase lock circuitry and/or outwards sends signal; Said receiver of remote-control sytem comprises RF receiving circuit, digital demodulator and the car body controller of band DSP, and said RF receiving circuit is used to receive signal; And/or judge whether signal meets that radiofrequency signal receives bandwidth requirement and signal is sent to the digital demodulator of band DSP; The digital demodulator of said band DSP is used to judge whether above-mentioned signal is the radio control signal of this car; Said car body controller is used to receive the signal of the digital demodulator forwarding of being with DSP; Said phase-locked loop is based on crystal oscillator and through the crystal oscillator starting of oscillation; Thereby the signal frequency that receives is promoted to assigned frequency, and said remote control transmitter further comprises launching uses antenna, and said radio-frequency transmissions circuit is through this antenna transmission radio signal; Said receiver of remote-control sytem further comprises antenna for receiving; It is used for the radio signal that receives is sent to RF receiving circuit, and said remote control transmitter further comprises button cell and button, and button cell is used for to other assemblies of remote control transmitter power supply being provided; Button is used for sending switching signal to MCU; This signal is obtained by the state that MCU detects button, and said receiver of remote-control sytem further comprises external loading as required, thereby said external loading is driven by car body controller and carries out work; Remote control transmitter adopts following algorithm steps:
(1) phase lock circuitry is promoted to assigned frequency through after the crystal oscillator starting of oscillation with signal frequency;
(2) phase lock circuitry sends to the radio-frequency transmissions circuit with information;
(3) the radio-frequency transmissions circuit is with the signal back phase lock circuitry;
(4) when signal frequency consistent with signal frequency in the phase lock circuitry, the radio-frequency transmissions circuit will send signal through antenna through wireless system;
(5) signal frequency in signal frequency and phase lock circuitry is inconsistent, then readjusts the frequency of sending signal, through phase lock circuitry, sends to the radio-frequency transmissions circuit once more, repeats above-mentioned proof procedure then.
2. the system algorithm of band mixed signal circuit automobile remote-control system as claimed in claim 1 is characterized in that, receiver of remote-control sytem adopts following algorithm steps:
1) antenna sends to RF receiving circuit with the radio signal that receives;
2) receive bandwidth requirement when signal frequency meets radiofrequency signal, then send to the digital demodulator of band DSP;
3) digital demodulator of band DSP detects and whether receives radio control signal:
4) when not receiving radio control signal, then the digital demodulator of DSP gets into the low power consumption state of dormancy, waits for and waking up next time;
5), then judge whether it is the radio control signal of this car when receiving radio signal;
6) be the radio control signal of this car when judgement, then be transmitted to car body controller, drive corresponding external loading work by car body controller;
7) when the radio control signal that is not this car, then get into dormant state once more, wait for next time and wake up.
3. the system algorithm of band mixed signal circuit automobile remote-control system as claimed in claim 2; It is characterized in that; In the step 3): the digital demodulator of band DSP is in the low power consumption state of dormancy, and every 100ms that crosses wakes once to detect whether receive radio control signal up, when receiving undesired signal; The digital demodulator of band DSP is judged in advance, and can not waken car body controller in advance up and drive external loading.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101963465A CN101894453B (en) | 2010-06-02 | 2010-06-02 | Automobile remote-control system with mixed signal circuit and system algorithm thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101963465A CN101894453B (en) | 2010-06-02 | 2010-06-02 | Automobile remote-control system with mixed signal circuit and system algorithm thereof |
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| Publication Number | Publication Date |
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| CN101894453A CN101894453A (en) | 2010-11-24 |
| CN101894453B true CN101894453B (en) | 2012-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010101963465A Active CN101894453B (en) | 2010-06-02 | 2010-06-02 | Automobile remote-control system with mixed signal circuit and system algorithm thereof |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102314760A (en) * | 2011-09-13 | 2012-01-11 | 赵永 | Wireless remote controlling device based on micro control unit (MCU) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2187136Y (en) * | 1994-01-12 | 1995-01-11 | 胡伟 | Remote-control antitheft alarm for motorcycles |
| US5764697A (en) * | 1992-07-15 | 1998-06-09 | Futaba Denshi Kogyo, K.K. | Transmitter for a radio control device |
| CN2530847Y (en) * | 2002-02-05 | 2003-01-15 | 刁加文 | Anti-theft device for vehicles |
| CN201321015Y (en) * | 2008-10-14 | 2009-10-07 | 南京天擎汽车电子有限公司 | Remote control key-free log-on system transmitting terminal apparatus |
-
2010
- 2010-06-02 CN CN2010101963465A patent/CN101894453B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5764697A (en) * | 1992-07-15 | 1998-06-09 | Futaba Denshi Kogyo, K.K. | Transmitter for a radio control device |
| CN2187136Y (en) * | 1994-01-12 | 1995-01-11 | 胡伟 | Remote-control antitheft alarm for motorcycles |
| CN2530847Y (en) * | 2002-02-05 | 2003-01-15 | 刁加文 | Anti-theft device for vehicles |
| CN201321015Y (en) * | 2008-10-14 | 2009-10-07 | 南京天擎汽车电子有限公司 | Remote control key-free log-on system transmitting terminal apparatus |
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| CN101894453A (en) | 2010-11-24 |
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