CN203397408U

CN203397408U - Doorknob sensing system on PKE (Passive Keyless Entry)

Info

Publication number: CN203397408U
Application number: CN201320370584.2U
Authority: CN
Inventors: 潘云峰
Original assignee: RUI'AN FENGDA AUTO PARTS Co Ltd
Current assignee: RUI'AN FENGDA AUTO PARTS Co Ltd
Priority date: 2013-06-26
Filing date: 2013-06-26
Publication date: 2014-01-15
Anticipated expiration: 2023-06-26

Abstract

The utility model belongs to the technical field of car electronic systems and particularly relates to a doorknob sensing system on a PKE (Passive Keyless Entry), which can be used for a practical, portable and safe passive keyless entry of an automobile. The doorknob sensing system is composed of a capacitance type touch sensing device, a main engine and a remote control device, wherein the capacitance type touch sensing device is mounted on a doorknob and is used for sending a human hand; the main engine is used for receiving an awakening signal sent by the capacitance type touch sensing device; the remote control device is matched with the main engine; the main engine controls the movements of a lock body of a car body. The design utilizes a novel touch sensing technology; the touch sensing technology has the advantages that the doorknob does not need to be replaced and only a conductive thin film can be additionally arranged on the doorknob of the previous car, so that the installation is convenient and the beautiful appearance is not influenced.

Description

Door handle induction system on a kind of PKE

Technical field

The utility model belongs to automobile electronic system technical field, is specifically related to a kind of automotive practical of taking into account, the door handle induction system on the PKE of convenient and safe keyless gate inhibition system.

Background technology

At present, PKE scheme traditional on market has 2 kinds, a kind of, as long as telechiric device (Intelligent key end) is close, car door is with regard to automatic unlocking.Process like this and have obvious drawback, the first is not accomplished low-power consumption truly, and it is two safe not.First scheme is, repacking door handle is replaced with a kind of door handle of band special button, telechiric device (Intelligent key end) near after, press the button, just unblank.Although do like this, realized low-power consumption, brought new problem simultaneously yet, increased cost on the one hand, on the other hand, some client does not like changing handle.The difficult situation that has so just caused this fish in current PKE market and bear's paw to get both.

Utility model content

In order to overcome above shortcomings part in prior art, the purpose of this utility model is to provide a kind of more intelligentized scheme, both realize the low-power consumption in design, met again client to the door handle induction system on the PKE of convenient and safe demand.

In order to reach above-mentioned object, the utility model adopts following concrete technical scheme:

Door handle induction system on a kind of PKE, by being arranged on door handle for responding to the capacitance touch induction installation of staff, receive the main frame of the wake-up signal that described capacitance touch induction installation sends, and form the action of host computer control vehicle body lock body with the telechiric device of described main frame pairing;

Described main frame comprises host CPU, the wake-up signal that it sends for receiving described capacitance touch induction installation, and control the action of low frequencies module, for the remote control mode that high frequency receiver module is received, identify simultaneously, and then control the action of vehicle body lock body; Low frequencies module, it is for launching default low frequency signal; High frequency receiver module, the remote control mode that it sends for receiving telechiric device;

Described telechiric device comprises low frequency receiver module, the low frequency signal that it sends for Receiving Host, and wake telechiric device CPU up; Telechiric device CPU, it is for the low frequency signal receiving is identified to judgement, and controls the action of high-frequency emission module; High-frequency emission module, it is for launching a string encrypted remote control mode.

Further, door handle induction system on a kind of PKE according to claim 1, it is characterized in that: described capacitance touch induction installation is: No. 1 pin of U1 chip is by control capacittance C1 ground connection, No. 2 pin of U1 chip are by control capacittance C2 ground connection, No. 3 pin ground connection of U1 chip, No. 4 pin of U1 chip are by capacitor C 3 ground connection, simultaneously, No. 4 pin of U1 chip are connected with input end IN1 by R1, No. 5 pin of U1 chip are by capacitor C 4 ground connection, simultaneously, No. 5 pin of U1 chip are connected with input end IN2 by R2, No. 6 pin of U1 chip are connected to input voltage VCC, No. 7 pin and No. 8 pin of U1 chip are connected with respectively output terminal OUT2 and OUT1, between output terminal OUT2 and input voltage VCC, be connected with R4, between output terminal OUT1 and input voltage VCC, be connected with R3, between input voltage VCC and earth terminal, by capacitor C 5, connect, described input end IN1 and input end IN2 are all electrically connected to the conductive film that is arranged on automobile door handle inner side, described output terminal OUT1 and output terminal OUT2 are all electrically connected to host CPU.

Further, described conductive film is metallic film.

Further, described U1 chip is TS02K cake core, and the capacity of described control capacittance C1 and C2 is 10pF, described input voltage VCC is 5V, and resistance R 1 and R2 are 20 Ω, and resistance R 3 and R4 are 10K Ω, the capacity of described capacitor C 3 and C4 is 10pF, and the capacity of described capacitor C 5 is 1 pF.

Compared with prior art, the utlity model has following outstanding advantages and effect:

The design has used a kind of advantage of novel this touch sensible technology of touch sensible technology to be just not need to change door handle, and be only used on the door handle of former car, is installed in addition with a slice conductive film, easy for installation, and does not affect the appearance.

Accompanying drawing explanation

Fig. 1 is theory diagram of the present utility model.

Fig. 2 is the electronic component of touch induction device of the present utility model.

Embodiment

As shown in Fig. 1-2, door handle induction system on a kind of PKE, by being arranged on door handle for responding to the capacitance touch induction installation of staff, receive the main frame of the wake-up signal that described capacitance touch induction installation sends, and form the action of host computer control vehicle body lock body with the telechiric device of described main frame pairing;

Further, described conductive film is metallic film.

C1, C2 is control capacittance, can regulate touch sensible sensitivity; IN1 and IN2 are independently touch sensible input of two-way; OUT1 and OUT2 are corresponding two-way output terminal.Due to human body can equivalence see a capacitor C f as, when staff touches the design's conductive film (conductive film is arranged on door handle and with input end IN1 and IN2 end and is electrically connected to as induction medium), be equivalent on IN1 and IN2 end a resistance Cf in parallel, just there is variation in the capacitance of IN1 and IN2 end like this, once IN1 and IN2 end capacitance change, the internal logic circuit of U1 chip will change at corresponding OUT1 or level of OUT2 output, the level of this variation just can be used as host CPU and detects the foundation whether staff touches door handle, it should be noted that, the IN1 of this touch induction device and IN2 end are independent mutually, be independent of each other.

Usually under state, the design's main frame and telechiric device, respectively in low-power consumption and dormant state, extend the serviceable life of telechiric device and main frame greatly.Even if telechiric device (Intelligent key end) is near car body, the main frame in car body does not have any action yet.The object of doing is like this exactly to pass through because of carelessness car side for fear of car owner sometimes, does not want to get on the bus, and just pass by, and car door has been opened, so very dangerous.Have and only have telechiric device (Intelligent key end) near vehicle, and car owner touched the induction medium on vehicle body door handle, this time, induction module will send activation signal.

After host CPU is activated, control the low frequency signal of low frequencies module transmitting 125KHz, when telechiric device (, Intelligent key end) receive after the low frequency signal of the 125KHz that main frame sends, the low frequency receiver module of telechiric device sends wake-up signal, telechiric device CPU is waken up, and then telechiric device CPU starts to identify this string low frequency signal, judgement is if legal authorization person, telechiric device can be launched the remote control mode of a string encryption by 315M or 433M high-frequency emission module, the high frequency receiver module of main frame is received this and is serially added and give host CPU after close remote control mode and decode, only after decoding is passed through, main frame just can send instruction, make the action of vehicle body lock body, door is with regard to automatic unlocking.And this series of action all will complete with interior at 0.5S, as long as telechiric device (Intelligent key end) meets, action is accomplished without any letup, and can not bring the experience of any inconvenience to car owner.

Finally it should be noted that: above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can modify or be equal to replacement the technical solution of the utility model, and not departing from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of claim scope of the present utility model.

Claims

1. the door handle induction system on a PKE, it is characterized in that: by being arranged on door handle for responding to the capacitance touch induction installation of staff, receive the main frame of the wake-up signal that described capacitance touch induction installation sends, and form the action of host computer control vehicle body lock body with the telechiric device of described main frame pairing;

2. the door handle induction system on a kind of PKE according to claim 1, it is characterized in that: described capacitance touch induction installation is: No. 1 pin of U1 chip is by control capacittance C1 ground connection, No. 2 pin of U1 chip are by control capacittance C2 ground connection, No. 3 pin ground connection of U1 chip, No. 4 pin of U1 chip are by capacitor C 3 ground connection, simultaneously, No. 4 pin of U1 chip are connected with input end IN1 by R1, No. 5 pin of U1 chip are by capacitor C 4 ground connection, simultaneously, No. 5 pin of U1 chip are connected with input end IN2 by R2, No. 6 pin of U1 chip are connected to input voltage VCC, No. 7 pin and No. 8 pin of U1 chip are connected with respectively output terminal OUT2 and OUT1, between output terminal OUT2 and input voltage VCC, be connected with R4, between output terminal OUT1 and input voltage VCC, be connected with R3, between input voltage VCC and earth terminal, by capacitor C 5, connect, described input end IN1 and input end IN2 are all electrically connected to the conductive film that is arranged on automobile door handle inner side, described output terminal OUT1 and output terminal OUT2 are all electrically connected to host CPU.

3. the door handle induction system on a kind of PKE according to claim 2, is characterized in that: described conductive film is metallic film.

4. the door handle induction system on a kind of PKE according to claim 3, it is characterized in that: described U1 chip is TS02K cake core, the capacity of described control capacittance C1 and C2 is 10pF, described input voltage VCC is 5V, resistance R 1 and R2 are 20 Ω, resistance R 3 and R4 are 10K Ω, and the capacity of described capacitor C 3 and C4 is 10pF, and the capacity of described capacitor C 5 is 1 pF.