JPH067029Y2 - Bank angle sensor output correction device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an output correction device for a bank angle sensor used in an electronically controlled suspension device of a motorcycle, and more particularly, to an output of the bank angle sensor immediately after turning on a power supply voltage. The present invention relates to a bank angle sensor output correction device that eliminates instability when a voltage rises.

(Prior Art) Various electronically controlled suspension devices for motorcycles have been proposed in which the damping force of a shock absorber is varied to control the strength of the suspension.

In such a device, the damping force is variably controlled by determining the starting, braking, cornering state, etc. from the vehicle speed signal from the vehicle speed sensor, the bank angle signal from the bank angle sensor, and the like.

(Problems to be Solved by the Invention) FIG. 3 is a waveform diagram for explaining the problems of the bank angle sensor.

In a device that uses a rate gyro as the bank angle sensor, the gyro motor has a rotation speed Nr indicated by the diagonal lines in Fig. 3 (a).
When it becomes pm or more, it becomes a stable motor rotation area, and it takes t ₁ seconds from the time of power-on until it enters this stable area. Therefore, immediately after the engine is started, the output of the bank angle sensor as shown in Fig. 3 (b) The voltage could become unstable.

Therefore, at the time of a sudden start or a sharp turn immediately after the engine is started,
There is a problem that an accurate bank angle signal cannot be obtained.

An object of the present invention is to generate a pseudo output voltage at the time of unstable output immediately after the bank angle sensor is powered on, and to make a voltage equivalent to the voltage during banking the bank control voltage. An object of the present invention is to provide an output correction device for a bank angle sensor that can prevent a decrease in traveling stability due to a sudden start or a sharp turn immediately after starting.

(Means for Solving Problems) An output correction device for a bank angle sensor according to the present invention comprises a pseudo bank angle signal generation circuit, a stable rotation area determination circuit, and a switching circuit, and a bank until the gyro motor stably rotates. It is configured to output a pseudo bank angle signal instead of the output of the angle sensor.

The pseudo bank angle signal generation circuit is a circuit that generates a pseudo bank angle signal equivalent to the output voltage in the bank of the bank angle sensor.

The stable rotation area determination circuit is a circuit that determines that the motor of the bank angle sensor has reached the stable rotation area and outputs a switching signal. The stable rotation area determination circuit can be a time constant circuit that outputs a switching signal after a certain time has elapsed from when the power supply voltage was applied.

The switching circuit outputs the pseudo bank angle signal from the pseudo bank angle signal generation circuit when there is no switching signal from the stable rotation area determination circuit, and outputs the bank angle signal from the bank angle sensor when the switching signal is present. This is a switching circuit for outputting.

Embodiment Hereinafter, the present invention will be described in detail with reference to the drawings and the like.

FIG. 1 is a circuit diagram showing an embodiment of a bank angle sensor output correction device according to the present invention, and FIG. 2 is a waveform diagram for explaining the operation of the embodiment device.

In FIG. 1, 1 is a bank angle sensor, 2 is an output voltage correction circuit, 3 is an analog switch, 4 is a pseudo bank angle voltage generation circuit, 5 is a time constant circuit, and 6 is an A / D converter.

The bank angle sensor 1 is a sensor for detecting the bank angle of the motorcycle, and for example, a rate gyro is used. The output VBC of the bank angle sensor 1 is connected to the a terminal of the analog switch 3 via the output voltage correction circuit 2.

The output voltage correction circuit 2 gives the output voltage of the bank angle sensor 1 a certain time constant, takes out a large change amount of the output voltage, that is, a drift amount, and sets it as a reference voltage. It is a correction circuit that makes the difference from the voltage the bank angle signal VB.

The pseudo bank angular voltage generation circuit 4 supplies the power supply voltage Vcc to the resistor R
₁ is a circuit for generating a pseudo bank angle output voltage VBS by using R ₁ and R ₂ , and its output VBS is connected to the b terminal of the analog switch 3.

The time constant circuit 5 is a circuit that generates an output after a time constant t ₁ by a resistor R ₃ and a capacitor C, and its output is connected to the s terminal of the analog switch 3. The signal connected to the s terminal is at low level when the power is turned on, but t ₁
It goes high after an hour.

The analog switch 3 is a switch that selects the b terminal (output voltage VBS) when the s terminal is at the low level and selects the a terminal (output voltage VB) when the s terminal is at the high level.
The output of the analog switch 3 is input to the controller of the electronically controlled suspension device (not shown) via the A / D converter 6.

The operation of the bank angle sensor output correction device according to the present invention will be described below.

When the power is turned on, the output of the time constant circuit 5 is at a low level for a certain period of time before the lapse of time t _{1 in} FIG. 2, so that the analog switch 3 outputs the pseudo bank angle output from the pseudo bank angle voltage generation circuit 4. Output voltage VBS.

After the lapse of t ₁ hour, the output of the time constant circuit 5 becomes high level.
The output voltage VB corrected by the output voltage correction circuit 2 is output.

Therefore, even if the vehicle suddenly starts or turns suddenly immediately after the power is turned on, the controller determines that the bank angle signal is large and the vehicle speed signal is present, and the damping force is controlled to be large, so that the running stability is deteriorated. Can be prevented.

It should be noted that the rotational speed of the gyro motor may be detected and the pseudo bank angular voltage VBS may be output when it is N rpm or less.

(Effects of the Invention) As described in detail above, according to the present invention, a pseudo output voltage is generated at the time of unstable output immediately after the bank angle sensor is powered on, and is equivalent to the voltage when banking. Since the bank control voltage is used as the bank control voltage, there is an effect that the running stability can be maintained even if the vehicle suddenly starts or turns immediately after the engine starts.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a circuit diagram showing an embodiment of an output correction device for a bank angle sensor according to the present invention. FIG. 2 is a waveform diagram for explaining the operation of the embodiment of the output correcting device for the bank angle sensor according to the present invention. FIG. 3 is a waveform diagram for explaining the problems of the bank angle sensor. 1 ... Bank angle sensor 2 ... Output voltage correction circuit 3 ... Analog switch 4 ... Pseudo bank angle voltage generation circuit 5 ... Time constant circuit 6 ... A / D converter

Claims (2)

[Scope of utility model registration request] 1. A pseudo bank angle signal generation circuit for generating a pseudo bank angle signal equivalent to an output voltage in a bank of a bank angle sensor, and determining that a motor of the bank angle sensor has reached a stable rotation region. A stable rotation region determination circuit that outputs a switching signal, and a pseudo bank angle signal from the pseudo bank angle signal generation circuit when there is no switching signal from the stable rotation region determination circuit, and the bank when there is the switching signal. An output of the bank angle sensor configured to output the pseudo bank angle signal instead of the output of the bank angle sensor until a stable rotation of the motor. Correction device. 2. The utility model registration claim according to claim 1, wherein the stable rotation region determination circuit is a time constant circuit which outputs a switching signal after a lapse of a certain time from when the power supply voltage is applied. An output correction device for the bank angle sensor as described in the above item.