KR100195764B1 - Position detecting device of shift gears - Google Patents

Abstract

The present invention relates to a vehicle transmission gear position detection device using infrared rays used in addition to the receiving unit of the remote start device in order to prevent the risk of remote start. The transmission gear position detecting device includes a code generator (1) for outputting a coded pulse; A coded infrared signal generator (2) for amplifying a code signal to drive an infrared diode and connecting the generated intermittent infrared rays from a laser module to send them to a detection position; A reflector (3) attached to a portion of a detection stick of the vehicle transmission to reflect incident intermittent infrared rays to a light receiving unit; An infrared signal receiver 4 for receiving the reflected infrared signal; A signal compensator 5 for receiving daylight and external light and differentially amplifying the amplifier together with the received signal of the infrared signal receiver 4 to compensate for the daylight and external light; Schmitt trigger amplification unit (6) for amplifying the reception code signal and a signal decoding unit (7) for outputting an output signal if the received signal is decoded.

Description

Infrared transmission gear position detection device

1 is a block diagram of the present invention circuit.

2 is a detailed circuit diagram of the invention.

3 is a timing diagram of an encoder output.

* Explanation of symbols for main parts of the drawings

1: Code generator 2: Infrared signal generator

3: reflector 4: infrared signal receiver

5: signal compensation unit 6: Schmitt trigger amplification unit

7: signal decoding unit

The present invention is to provide a vehicle transmission gear position detection device using infrared rays used in addition to the receiver of the remote start device in order to prevent the risk of remote start.

Vehicles equipped with automatic transmissions can be started only when the gear position is parked or neutral, so there is no problem in safety and convenience when starting remotely even if a remote starting device is installed. However, vehicles equipped with manual transmissions have neutral gears. If you start the car when you are in the first or reverse position, the car will move forward or backward. In general, the remote starting device is installed so that the remote start is performed regardless of the state of the gear. Therefore, when the transmission gear is in the first gear or the reverse gear, the vehicle runs and a safety problem occurs.

In addition, when using a vehicle equipped with a manual gear with a remote control device by using a remote control system, the steering gear must be kept in neutral to leave the driver's seat, thus ensuring safety during remote start. A method of determining a shift position by detecting a signal reflected from a reflector as a photodetector installed in a shift lever for detecting the position is known from Japanese Patent Application Laid-Open No. 2-92733. In addition, since the optical signal cannot be coded, it could not be put to practical use. In addition, a magnetic or mechanical manual transmission neutral position sensor was provided. There is a lot of heavy vibration of the car directly and the failure rate is high, and when the malfunction causes the unmanned driving state, its use is avoided.

An object of the present invention is to improve the above problems and to provide a highly reliable vehicle transmission gear position detection device that is not subjected to vibrations or external influences and does not become an unmanned driving state even during malfunction.

The above object of the present invention is achieved by a transmission gear position detecting apparatus using infrared rays capable of linear reflection for non-contact remote position detection.

The present invention includes a code generator for outputting a coded pulse assigned to the input pin in accordance with the selection of the input pin; A coded infrared signal generator for amplifying a code signal to drive a laser diode and connecting the generated intermittent infrared rays from the infrared module to transmit the detected signal at a detection position; A reflection part attached to a part of a stick of the vehicle transmission to reflect incident intermittent infrared rays to the light receiving part; An infrared signal receiver for receiving the reflected laser signal; A signal compensator for receiving daylight and external light and differentially amplifying the amplifier together with the received signal of the infrared signal receiver to compensate for daylight and external light; Schmid trigger amplification unit for amplifying the reception code signal and a signal readout display unit for decoding the received signal and outputs an output signal if it is a predetermined signal; configured to receive the infrared signal from the receiver only when the transmission stick is in a neutral state to detect a specific position It is composed of a transmission gear position detection device using infrared rays, which outputs a signal and can safely drive a remote starter.

The present invention will be described in detail with reference to the accompanying drawings.

The present invention provides a code generator for outputting a coded pulse assigned to the input pin according to the selection on the input pin (1); A coded infrared signal generator (2) for amplifying a code signal to drive an infrared generator and for connecting the generated intermittent infrared rays to an infrared module and transmitting them to a detection position; A reflector 3 attached to any part of the stick ST of the vehicle transmission to reflect incident intermittent infrared rays to the light receiving unit; An infrared signal receiver 4 for receiving the reflected infrared signal; A signal compensator 5 for receiving daylight and external light and differentially amplifying the amplifier together with the received signal of the infrared signal receiver 4 to compensate for the daylight and external light; Schmitt trigger amplification section 6 for amplifying the reception code signal and a signal decoding section 7 for outputting an output signal if the received signal is decoded.

The code generator is a PTC PT2262 encoder (EN). When the encoder (EN) addresses A0-A7 are selected to be bit 0, the output signal repeatedly outputs a high signal of n clock cycles and a low signal of n clock cycles as shown in FIG. By this address operation, another code bit 0-bit n can be selected. Similarly, the same code number bit 0-bit n must be selected in order to select the same code as the encoder.

The infrared signal generating unit 2 drives the infrared generating unit ID with the DIA ring Q1 and Q2 to obtain the coded infrared rays, and focuses the infrared rays from the infrared module IM and sends them to the reflecting unit 3. In the embodiment, the laser module IM is aimed at the infrared ray IB so as to capture the reflector 3 attached to the transmission stick ST in the specified position, that is, the neutral state, and at the reflector 3 By adjusting the infrared module (IM) so that the infrared light receiving radius is about 1cm, the infrared capture reliability in the reflector is increased.

The infrared reflector 3 used a reflector having a radius of about 1 cm in the embodiment. A seat for attaching a mirror is provided on the stick ST of the transmission, and the seat is selected according to the indoor environment of the vehicle such as the handle of the stick or the lever of the stick. The reflector 3 is aimed at reflecting the received infrared rays to the receiver installed at a predetermined position of the vehicle, and uses a flat mirror or a low curvature mirror to receive the infrared signal at any time within the allowable clearance range of the stick. To configure.

The infrared receiver 4 installs the coded infrared signal reflected from the phototransistor TR1 so as to obtain a voltage variation value between collector emitters.

The signal compensator 5 introduces external daylight and external light from the phototransistor TR2 in the same amount as the external light reception amount of the infrared signal receiver 4, and the error of the inflow can be controlled by the variable resistor VR. The output potentials of the two phototransistors TR1 and TR2 are bridged and differentially amplified to cancel the external optical signal and amplify only the code signal received by the receiver 4 phototransistor TR1.

The amplifier 6 is a Schmitt trigger amplifier and amplifies and outputs only the correct pulse when the received signal is unstable.

The signal decoding unit 7 is a PTC PT2272 decoder (DEC). The decoder DEC compares the input signal with the code (bit 0-bit n) specified through the addresses A0-A7 in the same way as the encoder EN and generates an output signal if it matches. The engine will start.

Reference numerals C1-C4 denote capacitors, R1-R4 denote resistors, D denotes light emitting diodes indicating the operating state of the signal decoding unit, and R13 and R14 denote resistors.

As described above, the present invention installs a reflector on the stick of the transmission, reflects the coded infrared rays from the reflector, and decodes the received infrared signal in a decoder so as to drive the driving device of the remote starter receiver only for the night signal. The safety of the remote starter can be secured and it can be used in various devices using the position detection of other transmissions.

Claims (3)

A code generator (1) for outputting a coded pulse in determining a shift position by detecting a signal reflected by a reflector in a light detection force; A coded infrared signal generator (2) for amplifying a code signal to drive an infrared diode and connecting the generated intermittent infrared rays from the infrared module to send them to a detection position; A reflection unit (3) attached to a portion of a detection stick of the vehicle transmission to reflect incident intermittent infrared rays to the light receiving unit; A signal receiver 4 for receiving the reflected infrared signal; A signal compensator 5 for receiving daylight and external light and differentially amplifying the amplifier together with the received signal of the infrared signal receiver 4 to compensate for the daylight and external light; A transmission gear position detecting apparatus using infrared rays comprising a schmitt trigger amplifier (6) for amplifying a received code signal and a signal decoder (7) for decoding a received signal and outputting an output signal if it is a predetermined signal. The transmission gear of claim 1, wherein a pulse coded by an encoder (EN) is output and a position detection signal is output in accordance with a result of signal readout promised by the decoder (DEC), thereby improving reliability of the position detection signal. Position detection device. The method of claim 1, wherein the compensator 5 introduces external daylight and external light in the phototransistor TR2 in the same amount as the external light reception amount of the infrared signal receiver 4, and the error of the inflow is variable resistor VR. The output potential of the two phototransistors TR1 and TR2 is bridged and differentially amplified to cancel the external optical signal, and amplifies only the code signal received by the receiver 4 phototransistor TR1. Automotive gear shift position detection device using infrared rays.