CN203180912U - Vehicle remote-control sending and receiving device - Google Patents
Vehicle remote-control sending and receiving device Download PDFInfo
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- CN203180912U CN203180912U CN 201320206795 CN201320206795U CN203180912U CN 203180912 U CN203180912 U CN 203180912U CN 201320206795 CN201320206795 CN 201320206795 CN 201320206795 U CN201320206795 U CN 201320206795U CN 203180912 U CN203180912 U CN 203180912U
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- filter circuit
- filter
- signal
- receiving system
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Abstract
Disclosed is a vehicle remote-control sending and receiving device including: a receiving antenna used for receiving signals from a remote-control key; a first filter circuit used for filtering, in the signals received from the remote-control key, the signals having a first frequency; a second filtering circuit for filtering, in the signals received from the remote-control key, the signals having a second frequency; a demodulating circuit used for demodulating the filtered signals of the first filtering circuit and the filtered signals of the second filtering circuit; and a single-chip microcomputer used for processing the demodulated signals of the demodulating circuit. The first filtering circuit and the second filtering circuit, which are connected in parallel, are connected to the receiving antenna respectively; the demodulating circuit is connected to the first filtering circuit and the second filtering circuit; and the single-chip microcomputer is connected to the demodulating circuit. The vehicle remote-control sending and receiving device employs a binary-channel method so that stability and reliability of a product and customer satisfaction are improved while product cost is not increased substantially.
Description
Technical field
The utility model relates to a kind of remote-receiver, more specifically, relates to a kind of vehicle remote control receiving system.
Background technology
On Hyundai Motor, the application of electron controls technology more and more widely, along with the technology of contemporary electronic technology product is rapidly innovated, various electronic products are widely applied on automobile, have realized that auto electronic control technology changes comprehensively.The application of these electronic-controlled installations is extremely important to environmental protection, combination property energy-conservation, that improve safety in operation and automobile.Automobile becomes the most typical product of electromechanical integration, but the interference of automobile self and the phase mutual interference between the automobile, and the interference that exists in the space has all had the requirement of change to the antijamming capability of automobile remote-control system.
At present, the door lock remote control of automobile, remote-control key has for example become the thing that must join of vehicle.The user uses remote-control key to open and the locking car door, opens luggage boot, even carries out remote control open and close vehicle window, and these modes of operation are comfortable and safe.In addition, can also utilize remote-control key realization remote activation vehicle motor and close vehicle motor.But along with the continuous progress of electronic technology, the electromagnetic environment in the space becomes increasingly complex, and the remote control system as Remote Control Vehicle opening/closing door of vehicle and Remote Control Vehicle start is easy to occur disturbed phenomenon.For example, the driver presses remote keying, but vehicle is not carried out the action of switching lock, forces steered vehicle person's manual unlocking car door.Perhaps the key anti-interference is poor, key need be placed on to specify anti-interference position just can start vehicle.This all needs the driver repeatedly to press remote keying to come repeated attempt.
Also have automobile-used remote-receiver with remote-control key is used, be installed in interior of body, remote-receiver mainly is made up of radio frequency reception antenna, matched filter and demodulation chip and single-chip microcomputer.Usually, remote-receiver is integrated in the body electronics controller, or is embodied as independent module.Remote-receiver is controlled automobile component for the signal that receives remote-control key and is acted accordingly.For example, after remote-receiver receives signal from the unlatching boot of remote-control key by the radio frequency reception antenna, this signal is by matched filter filtering, and through sending to single-chip microcomputer after the demodulation chip demodulation, single-chip microcomputer sends signal to the body electronics controller, body electronics controller control boot electronic lock is upspring, and boot is opened automatically.
In addition, China's Wireless Management Committee " micropower (short distance) wireless device management temporary provisions " requirement, automobile takies two radio frequency bands of 315MHz and 433.92MHz with remote-control key.Existing vehicle remote control receiving system receives only single-frequency signals, and the influence of signal if single-frequency signals is interfered will be arrived and caused remote-receiver can't receive useful signal.
The utility model content
At above-mentioned problems of the prior art, the utility model provides a kind of vehicle remote control receiving system, comprising: be used for receiving the reception antenna from the signal of remote-control key; At first filter circuit that the signal with first frequency in the described signal carries out filtering, this first filter circuit is connected to described reception antenna; At second filter circuit that the signal with second frequency in the described signal carries out filtering, this second filter circuit is connected to described reception antenna; Described first filter circuit and the described second filter circuit parallel connection; To the demodulator circuit that described first filter circuit and the filtered signal of second filter circuit carry out demodulation, described demodulator circuit is connected to described first filter circuit and described second filter circuit; To the single-chip microcomputer that the signal after the described demodulator circuit demodulation is handled, this single-chip microcomputer is connected to described demodulator circuit.
Further, described reception antenna is PCB antenna or built-in stand-alone antenna.
Further, described first filter circuit and described second filter circuit are band pass filter.
Further, described first filter circuit and described second filter circuit comprise amplifier.
Further, described vehicle remote control receiving system also comprises additional match circuit, and this additional match circuit is connected between described first filter circuit and the described demodulator circuit, and this additional match circuit is impedance matching circuit.
Further, described vehicle remote control receiving system also comprises: first match circuit, this first match circuit are connected between described reception antenna and described first filter circuit; And second match circuit, this second match circuit is connected between described reception antenna and described second filter circuit.
Further, described first match circuit and described second match circuit are impedance matching circuits.
Further, first filter circuit comprises the SAW-filter sound surface filtering chip of liking general Coase 315MHz, U.S. core LNA The low noise amplifier chip and first match circuit of being made up of surface-mount resistor electric capacity; Described second filter circuit comprises the SAW-filter sound surface filtering chip of liking general Coase 433.92MHz, U.S. core LNA The low noise amplifier chip and second match circuit of being formed by surface-mount resistor electric capacity, described additional match circuit comprises U.S. core LNA The low noise amplifier chip and surface-mount resistor electric capacity, and described demodulator circuit comprises likes special Mel ATA5780 chip.
The utility model has used two-channel method, can receive two kinds of frequencies limit number, has improved the reception reliability energy, has improved stability and the reliability of product, has improved customer satisfaction, and workinprocess cost does not have large increase simultaneously.
Description of drawings
Accompanying drawing shows embodiment of the present utility model, and with specification, is used for explaining principle of the present utility model.By the detailed description of doing below in conjunction with accompanying drawing, can more be expressly understood the purpose of this utility model, advantage and feature, identical feature is used identical label, wherein:
Fig. 1 is the connection diagram of automobile remote-control receiving system of the present utility model; And
Fig. 2 is a circuit diagram example of automobile remote-control receiving system of the present utility model.
Embodiment
Vehicle remote control receiving system of the present utility model comprises reception antenna.Usually, the radio frequency reception antenna is divided into stand-alone antenna or PCB(printed substrate according to the antenna form) antenna, stand-alone antenna is independent parts, the PCB antenna is the antenna that utilizes the circuit on the printed substrate to make.Can be divided into module built-in aerial or external antenna according to integrated approach, built-in aerial is the antenna that is integrated in remote-receiver inside, and external antenna is that remote-receiver needs external antenna.Built-in and the external receiving sensitivity that can influence product of antenna, the external antenna general appearance is bigger, causes performance more can take into account the demand of wireless signal, built-in aerial, because the restriction in built-in space, the performance of antenna can be not so good as external antenna.
Reception antenna of the present utility model is PCB antenna or built-in stand-alone antenna.The PCB antenna is the wiring of antenna between the enterprising andante of the metal level of multilayer board, and the PCB antenna also is built-in, the antenna of making for the circuit that utilizes on the printed substrate.Preferably, the number of plies of multilayer board is 2 layers.Stand-alone antenna can be built-in also can be external, if be external, external antenna can increase the interface of controller and extra wire harness (for example, the external antenna lead-in wire) so, can cause between the wire harness and disturb or produce screen effect.If adopt the PCB antenna, can overcome the shortcoming of above-mentioned external antenna, also reduced the production cost that increases cost of parts that independent component causes and install for stand-alone antenna.Therefore, the utility model adopts PCB antenna or built-in stand-alone antenna.
Compare with built-in stand-alone antenna with external antenna, reception antenna receptivity of the present utility model is more stable, can receive the signal of 315MHz and two kinds of frequency bands of 433.92MHz.Demarcate again and the course of work of adjusting when also having avoided simultaneously different automobile types to use.
Described vehicle remote control receiving system also comprises two filter circuits: first filter circuit and second filter circuit, these two circuit parallel connections.Signal after reception antenna receives is transferred to first and second filter circuits respectively.Wherein first filter circuit carries out filtering and amplification to the signal of first frequency 315MHz, and second filter circuit carries out filtering and amplification to the signal of second frequency 433.92MHz.These two filter circuits all are band pass filters, and the parameter of this band pass filter is transmitted the cut-off frequency of signal and the settings such as gain that bandwidth, signal amplify according to the circuit transmission impedance.
Described vehicle remote control receiving system also comprises demodulator circuit, and the signal after this demodulator circuit amplifies above-mentioned two filter circuit filtering carries out demodulation.Generally from the signal of remote-control key through ovennodulation, therefore need carry out demodulation at receiving terminal and realize.
Described vehicle remote control receiving system also comprises single-chip microcomputer, and the signal behind its receiving demodulation is analyzed signal, and other parts of controlling vehicle then produce corresponding actions, for example car door release.Signal after perhaps will resolving is transferred to the car running computer of vehicle, produces corresponding actions by other parts of car running computer control vehicle, for example opens boot.
Preferably, described vehicle remote control receiving system also comprises the additional match circuit that is connected between described first filter circuit and the demodulator circuit.Should additional match circuit be impedance matching circuit, by the impedance of this additional match circuit, the power maximum of transmitting between the realization input and output signal, energy loss minimum.
Preferably, described vehicle remote control receiving system also comprises first match circuit that is connected between reception antenna and first filter circuit, and be connected between reception antenna and second filter circuit with second match circuit.First and second match circuits are impedance matching circuits, by the impedance of match circuit, and the power maximum of transmitting between the realization input and output signal, energy loss minimum.
More specifically, the signal of remote-control key by reception antenna enter first coupling filter circuit (315MHz) and second mate filter circuit (433.92MHz), and the amplifying device of each self-corresponding circuit of process, impedance matching again by described additional match circuit, the signal input is entered demodulator circuit, and the signal feedback after handling is the most at last given single chip circuit.
The utility model has strengthened circuit design, has augmented filtering and the demodulator circuit of supporting 315Mhz and two frequency ranges of 433.92Mhz in the reception antenna rear end, can receive the signal of single frequency range, also can timesharing receives the signal of two-band.Therefore, the use of the utility model novelty antenna receive the signal of two frequency ranges, and the signal at different frequency range carries out filtering with two channels (first filter circuit and second filter circuit), and adopts a demodulator circuit.Than prior art, the utility model has only adopted a demodulator circuit, has reduced whole part volume and cost.
On the other hand, vehicle remote control receiving system of the present utility model can be incorporated into PEPS (Passive Entry﹠amp; Passive Start) in the keyless access system, can well improve vehicle and can't find key, the problem of acomia startup vehicle.Obtain confirming because the condition of vehicle launch is correct key information, when being interfered as single-frequency signals, can cause vehicle can't find key, can't start vehicle.After remote-control key adopts multifrequency signal, for example sends the signal of 433.92MHz earlier, send the signal of 315MHz again, and triplicate like this, received by antenna with the assurance signal.When transmitting data, can use this to use the receiving system of novel introduction to receive, reduce the problem that single signal frequency is interfered easily, reach and improve vehicle and can't find key, can't start the problem of vehicle.
Fig. 2 has shown the specific implementation example of filter circuit.In this example, first filter circuit (filter circuit of 315MHz) has adopted SAW-filter sound surface filtering chip, U.S. core LNA The low noise amplifier chip and first match circuit of being made up of surface-mount resistor electric capacity of liking general Coase 315MHz.Second filter circuit (filter circuit of 433.92MHz) has adopted SAW-filter sound surface filtering chip, U.S. core LNA The low noise amplifier chip and second match circuit of being made up of surface-mount resistor electric capacity of liking general Coase 433.92MHz.The matching network that additional match circuit has adopted U.S. core LNA The low noise amplifier chip and surface-mount resistor electric capacity to form.Demodulator circuit has adopted likes special Mel ATA5780 chip.
Claims (8)
1. a vehicle remote control receiving system is characterized in that, comprising:
Be used for receiving the reception antenna from the signal of remote-control key;
At first filter circuit that the signal with first frequency in the described signal carries out filtering, this first filter circuit is connected to described reception antenna;
At second filter circuit that the signal with second frequency in the described signal carries out filtering, this second filter circuit is connected to described reception antenna;
Described first filter circuit and the described second filter circuit parallel connection;
To the demodulator circuit that described first filter circuit and the filtered signal of second filter circuit carry out demodulation, described demodulator circuit is connected to described first filter circuit and described second filter circuit;
To the single-chip microcomputer that the signal after the described demodulator circuit demodulation is handled, this single-chip microcomputer is connected to described demodulator circuit.
2. vehicle remote control receiving system according to claim 1 is characterized in that, described reception antenna is PCB antenna or built-in stand-alone antenna.
3. vehicle remote control receiving system according to claim 1 is characterized in that, described first filter circuit and described second filter circuit are band pass filter.
4. vehicle remote control receiving system according to claim 3 is characterized in that, described first filter circuit and described second filter circuit comprise amplifier.
5. vehicle remote control receiving system according to claim 1 is characterized in that, also comprises:
Additional match circuit, this additional match circuit is connected between described first filter circuit and the described demodulator circuit, and this additional match circuit is impedance matching circuit.
6. vehicle remote control receiving system according to claim 5 is characterized in that, also comprises:
First match circuit, this first match circuit are connected between described reception antenna and described first filter circuit; And
Second match circuit, this second match circuit are connected between described reception antenna and described second filter circuit.
7. vehicle remote control receiving system according to claim 6 is characterized in that, described first match circuit and described second match circuit are impedance matching circuits.
8. vehicle remote control receiving system according to claim 7, it is characterized in that, first filter circuit comprises the SAW-filter sound surface filtering chip of liking general Coase 315MHz, U.S. core LNA The low noise amplifier chip and first match circuit of being made up of surface-mount resistor electric capacity; Described second filter circuit comprises the SAW-filter sound surface filtering chip of liking general Coase 433.92MHz, U.S. core LNA The low noise amplifier chip and second match circuit of being formed by surface-mount resistor electric capacity, described additional match circuit comprises U.S. core LNA The low noise amplifier chip and surface-mount resistor electric capacity, and described demodulator circuit comprises likes special Mel ATA5780 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320206795 CN203180912U (en) | 2013-04-23 | 2013-04-23 | Vehicle remote-control sending and receiving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320206795 CN203180912U (en) | 2013-04-23 | 2013-04-23 | Vehicle remote-control sending and receiving device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203180912U true CN203180912U (en) | 2013-09-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320206795 Expired - Fee Related CN203180912U (en) | 2013-04-23 | 2013-04-23 | Vehicle remote-control sending and receiving device |
Country Status (1)
| Country | Link |
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| CN (1) | CN203180912U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108880596A (en) * | 2018-07-09 | 2018-11-23 | 上海实业交通电器有限公司 | Remote control circuit based on automobile-used RKE double frequency transmitting and independent RFA |
-
2013
- 2013-04-23 CN CN 201320206795 patent/CN203180912U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108880596A (en) * | 2018-07-09 | 2018-11-23 | 上海实业交通电器有限公司 | Remote control circuit based on automobile-used RKE double frequency transmitting and independent RFA |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130904 Termination date: 20200423 |
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| CF01 | Termination of patent right due to non-payment of annual fee |