DE29808754U1 - Cruise control device for wireless remote control of the speed of a car - Google Patents

Description

Speed controller device for wireless remote control of the speed of a car

The invention relates to a cruise control device, in particular a cruise control device for wirelessly remotely controlling the speed of a car based on the application of infrared radiation.

So far, infrared radiation has not been used for wireless signal transmission for speed control (acceleration/resume or deceleration/set). An alternative to conventional signal transmission is being sought so that a wireless remote control of the speed of a car can be created, which remote control can adapt to different environments better than conventional remote controls.

According to the invention, a cruise control device is created with the features of claim 1.

Preferred further training is claimed in the subclaims.

The speed control device according to the invention has a transmitter which is installed in the car to transmit the infrared radiation so that it can be received by a receiver. Before the infrared radiation is sent to the cruise control, it is filtered (demodulated) and decoded in such a way that the signal can be recognized as an acceleration/continue signal or a deceleration/set signal for setting the car speed.

5 The invention is explained using a preferred embodiment with reference to the drawing. In the drawing:

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Fig.l is a block diagram showing the structure of an embodiment of the invention,

Fig.2 is a circuit diagram of a transmitter used in accordance with the embodiment of Fig.l, and

Fig.3 is a circuit diagram of a receiver used according to the embodiment.

Figures 1, 2 and 3 show an embodiment of the speed control device according to the invention, comprising a transmitter 1, a receiver 2 and a speed controller 3. The transmitter 1 is installed in the car in an easily accessible manner (for example on the steering wheel) and has an integrated coding circuit Ul, coding switches SW1-SW8, a resonator XL, resistors R1-R5, capacitors Cl-C4, coding switches SW9 and SW10, a transistor Q, two infrared light-emitting diodes IR LED1 and IR LED2, a light-emitting diode LED, an integrated circuit U2 for detecting a small voltage and selector switches COM1 and COM2 which can be selectively set for correct acceleration or deceleration according to the arbitrary installation on the left and right sides of the steering wheel, whereby simple installation and acceleration and deceleration corresponding effects can be achieved. The LED is activated when the operating voltage is less than 2.5V. This warns the user when the supplied electrical energy is insufficient, which can prevent an unexpected system failure.

0 The integrated coding circuit Ul sets the coding mode for internal codes by means of the coding switches SW9 and SW10, whereby the carrier signal to be transmitted includes the internal codes. The coding switches SW1-SW8 according to the embodiment can be used together with the coding switches SW9 and SW10 to set different coding modes.

The transmitter transmits infrared carrier signals of 3 8kHz.

The receiver according to Fig.3 comprises a voltage regulator 21, a power supply circuit 22, a circuit for switching the power supply on and off, an LED display 23, a decoder 24 and an output converter 25. The voltage regulator 21 comprises an integrated circuit U3, capacitors C4-C7, a diode DO and an overvoltage protection MOV. The voltage regulator is supplied with a voltage VIGN from the engine ignition signal supply, which is rectified, filtered and stabilized to provide a voltage of 5V.

The power supply circuit 22 has a switch SW, a light-emitting diode LED, a Zener diode ZD, a flip-flop U4, transistors Ql and Q2, resistors R4-R10, capacitors C8-ClO and terminal blocks P2, P4,... The terminal Vl of the terminal block P2 is connected to the cathode of the diode DO of the voltage regulator 21, while the terminal CR of the terminal block P2 is connected via the resistor R9 to the CLK terminal of the flip-flop U4, the Q terminal of the flip-flop U4 is connected via the resistor R7 to the base of the transistor Q2. The collector of the transistor Q2 is connected via the resistor R5 to the collector of the transistor Ql. The collector of the transistor Ql is also connected to the Vl terminal of the terminal block P2. The emitter of transistor Ql is connected to the VP terminal of terminal block P2, while the base is connected to the collector of transistor Q2 via resistor R6.

Pressing the voltage switch SW leads to a short circuit between the Vl connection and the CR connection of the terminal block P4, which causes a change in the state of the flip-flop U4 and controls the transistors Ql and Q2 in such a way that the voltage VIGN is applied to the circuit elements (e.g. speed controller) as the operating voltage. 5

The receiver circuit 23, which comprises a transistor Q7 and resistors R18 and R19, receives the filtered (or demodulated) carrier signals from the transmitter 1.

The decoder 24 connected to the output terminal of the receiver circuit 23 comprises an integrated encoder circuit U5, a resistor R20, capacitors C11, C12 and switches SW5-SW12 for setting the internal coding of the carrier signal. The decoder 24 decodes the signal supplied by the receiver circuit after filtering the carrier signal and outputs the accelerate/continue command or the decelerate/set command, which commands are represented by the decoded signals, the accelerate/continue command being output via the terminal 12 of the integrated encoder circuit U5 and the decelerate/set command being output via the terminal 13 of the integrated encoder circuit U5.

The output converter 25 has its input terminals, which are the base terminals of the transistors Q5 and Q6 , connected to the output terminals of the decoder 24 (terminals of the integrated coding circuit U5), with the output terminals of the output converter 25 being connected to the speed controller 3. The output converter 25 has transistors Q3-Q6 and resistors R11-R17. The output converter 25 passes the signals to the speed controller 3 in accordance with the signals output by the decoder 24.

The accelerate-Zcontinue command provided by decoder 24 enables terminal 12 of encoder integrated circuit U5 to output a voltage of �EEgr; level to turn on transistors Q3 and Q5 (conductive state), causing the voltage to be applied to the VP terminal of terminal block 0 P2 on speed controller 3, whereby a microprocessor present in the speed controller recognizes the accelerate-Zcontinue command to control the speed of a car.

Similarly, the delay/set command provided by decoder 24 enables pin 3 of encoder integrated circuit U5 to output a high voltage to turn on transistors Q4 and Q6 (conductive state), causing the voltage at the VP pin of the

Terminal block P2 is connected to the speed controller via resistor R15, whereby a microprocessor in the speed controller recognizes the deceleration/set commands for controlling the speed of a car. 5

The above-mentioned speed control device according to the invention uses infrared radiation for wireless signal transmission for speed control, particularly for speed control of a car, and can adapt better to different operating environments than a conventional wireless remote control.

Claims (8)

Expectations 1. A speed control device (3) for wirelessly remotely controlling the speed of a car by means of acceleration/continue and deceleration/set commands, comprising: a transmitter (1) from which infrared carrier signals can be generated and transmitted; and a receiver (2) by which the infrared carrier signals of the transmitter (1) can be received and filtered and decoded to provide the accelerate/continue and decelerate/set commands. 2. A cruise control device (3) according to claim 1, wherein the transmitter (1) has an integrated coding circuit (Ul) for setting different codings for internal codes of the infrared carrier signal, whereby abnormal operation can be avoided. 3. Speed control device (3) according to claim 2, wherein the transmitter (1) further comprises a light-emitting diode (LED) which can indicate a too low voltage level of the operating voltage supplied by a battery for the transmitter (1). 4. A cruise control device (3) according to claim 2, wherein the transmitter 5 (1) further comprises selector switches (COM1 and COM2) which can be set to the right and left sides of the steering wheel according to the installation, thereby allowing arbitrary installations on the right and left sides of the steering wheel. 0 5. A cruise control device (3) according to claim 1, wherein the receiver (2) comprises a receiver circuit (23) and a decoder (24), the receiver circuit (23) is capable of filtering the infrared carrier signal and of providing internal codes which can be obtained by filtering the infrared signal, the decoder (24) being capable of decoding the internal codes for providing the accelerate/continue and decelerate/set commands. 6. A cruise control device (3) according to claim 1, comprising a speed setting device for controlling the speed of the car according to the accelerate/continue and decelerate/set commands. 7. A cruise control device (3) according to claim 6, wherein the speed setting device comprises a microprocessor for supplying signals corresponding to the accelerate/continue and decelerate/set commands for controlling the speed of the car. 8. Cruise control device (3) according to claim 1, wherein the transmitter (1) is attached to the steering wheel by means of a belt.