JPS6323952B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a temporary steering angle center providing circuit, and more particularly to a steering angle center detecting circuit used in an automatic turn signal cancel device of a steering wheel turning angle detection type for vehicles such as motorcycles. The present invention relates to a temporary steering angle center providing circuit capable of outputting a temporary steering angle center so that the turning angle of the steering wheel can be detected even immediately after starting the steering angle.

The present applicant previously proposed an automatic turn signal canceling device for a vehicle such as a motorcycle, which detects the steering wheel turning angle and has effective operating performance. Vehicles such as motorcycles are equipped with bar handles, so it is not possible to always obtain a constant and large enough steering angle when changing direction. The challenge was how to detect it accurately. Since the turning angle of the steering wheel is measured with reference to the steering angle center of the steering wheel, the solution to the problem was to create a device that can always accurately set the steering angle center. Conventionally, it has been difficult to obtain the steering angle center with high precision due to the mechanical relationship of the vehicle.

Therefore, the present applicant uses a steering angle center detection circuit consisting of electrical means to regard the position of the steering wheel when the vehicle is traveling straight as the steering angle center of the vehicle, and stores this in a memory element. We have proposed an automatic turn signal cancel device that measures the turning angle of the steering wheel when changing direction based on this output, and cancels the turn signal activated when changing direction when a predetermined condition is satisfied. According to such a device, the steering angle center can be set accurately and unchangeably by the steering angle center detection circuit while the vehicle is running;
It is possible to effectively detect the turning angle of the steering wheel when changing direction, and to automatically cancel turn signal operation at the appropriate timing.

The present invention further improves the above-mentioned steering angle center detection circuit, and is configured such that the steering angle center is outputted from the steering angle center detection circuit even immediately after the power is turned on and the vehicle starts running.

An object of the present invention is to comprise a sensor that detects the movement of a steering shaft, and a holding circuit that is connected to the sensor through a switch means and holds the output of the sensor, and that makes the ON state of the switch means dependent on the vehicle speed. In a vehicle steering angle center detection circuit that outputs a steering angle center by changing the steering angle center, a circuit that holds a pre-stored signal representing the steering angle center is connected to the sensor output holding circuit, and is connected to the vehicle power supply. It is an object of the present invention to provide a temporary steering angle center providing circuit which inputs the steering angle center signal to the holding circuit at the same time as the turning on.

Therefore, an object of the present invention is to be able to set a temporary steering angle center at the same time as power is turned on in a vehicle in a steering angle center detection circuit used in an automatic turn signal cancel device using a steering wheel turning angle detection method. An object of the present invention is to provide a temporary steering angle center providing circuit that can substantially shorten the time required to detect a steering angle center based on a route.

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

Reference numeral 1 denotes a sensor configured to be linked with the movement of the steering shaft or the steering wheel, and output a predetermined voltage corresponding to each position of the steering shaft, and a potentiometer is used for this sensor. The output of sensor 1 passes through buffer amplifier 2 and semiconductor switch 3, and when switch 3 is in the on state, resistor 4
and a capacitor 5, and the voltage output from the sensor 1 is held in the integrating circuit 6 as the terminal voltage of the capacitor 5. The terminal voltage held in capacitor 5 is generated at terminal 8 through amplifier 7 and sent to the next stage.

The operation of the semiconductor switch 3 is controlled by the output from the vehicle speed detector 9. When the output of the vehicle speed detector 9 is at a high level, the switch 3 is turned on, and when the output is at a low level, the switch 3 is turned off.

The vehicle speed detector 9 is provided in the vehicle, and outputs a pulse having a constant pulse width in response to the operation of a reed switch 11 that is turned on and off by an electromagnet 10 that rotates in conjunction with the wheels. 1
A pulse is generated for a certain period of time by the action of the resistor 12 and capacitor 19 when the reed switch 11 is turned on from off. Since the above-mentioned pulses are generated by the on/off operation of the reed switch 11, the number of pulses increases as the vehicle speed increases, and therefore, as the vehicle speed increases, the number of times the semiconductor switch 3 is turned on increases.

13 is a circuit that provides a temporary steering angle center;
The collector of the transistor 14 is connected to the battery, a series circuit of a capacitor 15 and a resistor 16 is provided between the collector and the base, and a resistor 17 is provided between the base and ground.
The emitter of the amplifier 7 is connected to the + input of the amplifier 7 via a diode 18. The collector is connected to the power source when the entire vehicle is powered up.

The operation of the present invention will be explained below.

The function of the circuit A while the vehicle is running is to hold the voltage related to the steering angle center in the integrating circuit 6 and output it from the terminal 8 to the next stage. This is accomplished by the actions of the sensor 1, semiconductor switch 3, and vehicle speed detector 9, respectively. Since the sensor 1 outputs a voltage corresponding to the position of the steering axis, it outputs a voltage corresponding to the steering angle center when the vehicle is traveling straight. Therefore, when the vehicle speed is above a certain level, the switch 3 is turned on more frequently depending on the output of the vehicle speed detector 9, so the voltage related to the steering angle center is held as the terminal voltage of the capacitor 5 in the integrating circuit 6. be done.

However, when the vehicle has not started running after the power has been turned on, there is no output from the vehicle speed detector 9 and the switch 3 remains off.
A voltage related to the steering angle center does not occur in the terminal voltage of the capacitor 5. Therefore, immediately after the vehicle starts running, it is not possible to set the steering angle center necessary for determining the steering wheel turning angle at the terminal 8.

Therefore, a circuit 13 is provided, and when the main switch is turned on in the circuit 13 to supply power to the entire vehicle's electrical system, current flows through the base of the transistor 14 through the capacitor 15 and the resistor 16, so the transistor 14 becomes conductive. , the terminal voltage of the capacitor 5 is increased to a potential determined by the resistors 16 and 17. Then capacitor 15
is charged and no current flows to the base, turning off the transistor 14. As a result, the terminal voltage of the capacitor 5 is set to a voltage corresponding to the temporary steering angle center.

As described above, even immediately after the vehicle is powered on and starts running, the circuit 13 provides the temporary steering angle center to the steering angle center detection circuit A. , the steering angle center detection time is substantially shortened and outputted.

In the above, the temporary steering angle center providing circuit 13 is
It goes without saying that the present invention is not limited to the steering angle center detection circuit A of this embodiment, and can be used in various types of steering angle center detection circuits.

Further, the circuit configuration of the temporary steering angle center providing circuit 13 is not limited to this embodiment, and it goes without saying that the circuit can be changed as desired.

As is clear from the above description, according to the present invention,
By connecting the output line of the circuit that outputs the voltage related to the temporary steering angle center immediately after power is turned on to the holding circuit that holds the voltage related to the steering angle center of the steering angle center detection circuit, it is possible to The voltage related to the temporary steering angle center can be set at the output of the steering angle center detection circuit, and the operational performance of an automatic turn signal cancel device that measures and operates the steering wheel turning angle based on the steering angle center can be improved. It is possible to demonstrate effects such as being able to do things.

[Brief explanation of the drawing]

The drawing shows one embodiment of the present invention, and is a circuit diagram of a steering angle center detection circuit including a temporary steering angle center providing circuit. In the drawing, 1 is a sensor, 3 is a semiconductor switch,
6 is an integrating circuit, 9 is a vehicle speed detector, 11 is a reed switch, and 13 is a provisional steering angle center providing circuit.

Claims (1)

[Claims] 1 Consists of a sensor that detects the movement of the steering shaft, and a holding circuit that is connected to the sensor via a switch means and holds the output of the sensor, and by changing the on state of the switch means depending on the vehicle speed. In a steering angle detection circuit for a vehicle configured to output a steering angle center, a circuit that holds a pre-stored signal representing a steering angle center is connected to the sensor output holding circuit, and is connected to the sensor output holding circuit so that the steering A provisional steering angle center providing circuit characterized in that an angle center signal is input to the holding circuit.