KR101142872B1 - Automobile's indicator light control system - Google Patents

Abstract

The present invention relates to a vehicle direction indicator control system, in addition to the generation of a direction indicator selection signal generated by the driver's manual operation, the vehicle direction indicator control system configured to automatically detect the direction of the vehicle (rotation) to turn on the direction indicator. It is about.

Turn indicator, turn signal, acceleration sensor

Description

Automotive's indicator light control system

The present invention relates to a vehicle direction indicator control system, in addition to the generation of a direction indicator selection signal generated by the driver's manual operation, the vehicle direction indicator control system configured to automatically detect the direction of the vehicle (rotation) to turn on the direction indicator. It is about.

The turn indicators used in automobiles are essential equipment for the safety of the driver and the vehicle to inform the other car about the driving direction of the vehicle. The control of the turn indicators for the vehicle is the turn indicator switch next to the steering wheel of the driver's seat. Direction indicator levers), and all the vehicle direction indicator switches have almost the same structure.

In general, the direction indicator performs an intermittent function of informing the other vehicle in advance or of the direction in which the vehicle is to proceed.In the situation where the vehicle's driving speed is fast or frequent lane changes are required, the direction indicator switch operation threatens safe driving. This can be

As a result, many drivers change the direction of the car without turning on the indicator when an emergency or frequent change of direction occurs, which may lead to an accident because the vehicle cannot be notified to the other vehicle. There is an urgent need for effective solutions.

The present invention is to improve the above problems of the conventional turn signal control system, the priority is given to manual operation to operate the direction indicator, but if the driver changes the rotation direction of the car without manual operation is switched to the automatic mode An object of the present invention is to provide a vehicle direction indicator control system that enables the vehicle to blink automatically according to the direction of travel of the vehicle.

In the present invention, in the direction indicator control system of the vehicle to generate a lighting signal having a flashing period by the flasher unit when the direction indicator switch is manually operated, the direction indicator and the instrument panel, the direction of movement of the vehicle automatically detects the direction of movement of the vehicle Further comprising an automatic signal unit for transmitting a lighting signal to the indicator, the automatic signal unit, the mode switching unit for driving the circuit by determining the automatic mode switching time when there is no manual operation; A direction determination unit which automatically detects the rotational direction of the vehicle by the internal circuit after the automatic mode switching; And a signal output unit for outputting a driving signal to a corresponding direction indicator in response to the rotation direction detected by the direction determining unit. When there is a manual operation, the direction indicator is turned on according to a switch signal by manual operation, and manual If there is no operation, the direction indicator of the vehicle is configured to output a signal to automatically turn on the direction indicator by driving the direction determining unit by determining the automatic mode switching time. Provide a control system.

The direction determining unit is configured to determine the direction of rotation and sudden stop based on whether the acceleration value of the X, Y, Z three axes measured by the acceleration sensor exceeds the threshold value by comparing with the reference inclination value, or Gravity acceleration displacement of each of the three axes of X, Y, Z are measured, and the rotational direction and sudden stop are determined by correcting the displacement difference with a weight according to a reference slope value and comparing with a threshold value.

In addition, the direction determination unit may be configured to receive the output of the steering wheel steering angle sensor to compare the threshold value to determine the rotation direction.

According to another feature of the present invention, the automatic signal unit is integrated with the direction indicator, and the mode switching unit detects a manual operation signal from the internal terminal of the direction indicator lamp and continuously receives the signal from the direction determination unit when it is LOW for a predetermined period. Accordingly, the signal output unit is configured to transmit a lighting signal to blink the direction indicator, and when the signal of the internal terminal of the indicator light is HIGH, it is configured to transmit the manual operation signal of the internal terminal to the signal output unit.

According to the present invention, even if the direction indicator light operation by the manual operation is maintained as it is, it is automatically determined whether to change the direction and even if the driver does not operate manually, it can automatically send a flashing signal to the direction indicator light, the driver can concentrate on driving only In addition, by automatically blinking the direction indicators according to the direction of the car, the movement of the other vehicle is accurately detected, thus reducing the risk of an accident.

Moreover, the present invention can be economically implemented by using the signal input and output of the conventional direction indicator control system as it is, and when implemented integrally with the direction indicator lamp, the effect of the present invention can be seen only by replacing the direction indicator lamp and applying it to an existing vehicle. Excellent sex

The present invention relates to an automatic indicator light structure and circuit for automatically detecting the rotational motion of the vehicle and flashing the corresponding indicator light switch even when the driver does not operate the direction indicator switch when the driver changes lanes or rotates the vehicle.

This is a very useful technology that can reduce the risk of an accident by detecting the rotational movement of the vehicle and flashing the direction indicator even if the driver does not accidentally operate the direction indicator switch when the vehicle turns.

The vehicle direction indicator control system according to the present invention includes a configuration as shown in FIG.

The present invention is generated as a lighting signal having a flashing cycle by a conventional manual operation is operated in conjunction with the vehicle direction indicator control system, when the driver operates the switch, the light signal having a flashing cycle is sent by the flasher unit and Accordingly, a conventional vehicle direction indicator control system for transmitting a signal to the direction indicator and causing the direction indicator to flash is assumed.

That is, the present invention is a control system capable of manual / automatic switching, and the driver may perform manual operation as in the prior art, and in the absence of manual operation, the driving direction may be sensed in the automatic mode and the direction indicator may blink automatically. To ensure that

To this end, the present invention includes an automatic signal unit for automatically detecting a direction and outputting a lighting signal in a conventional control system, wherein the automatic signal unit is a mode switching unit 1, a direction determination unit 2, and a signal output unit. It includes (3).

Mode switching unit (1)

The mode switching unit 1 is a means for driving a circuit for automatically detecting a direction by determining an automatic mode switching point, and when there is no switch operation by manual operation, the input terminal signal of the corresponding switch circuit is maintained at a LOW state. If the LOW state is detected for a predetermined time, the circuit is configured to give priority to manual operation such as switching to automatic mode or interrupting the automatic mode during manual operation during automatic mode operation.

That is, the mode switching unit 1 constantly monitors whether the direction indicator lamp is turned on by manual operation. When the corresponding signal lines R_IN and L_IN remain low for a predetermined time, the driver operates the direction indicator switch. It judges that it does not and enters automatic mode.

In this way, the mode switching unit 1 monitors the R_IN and L_IN ports at all times in the automatic mode. However, the direction of the vehicle is determined and it is operating in the automatic mode. Therefore, the output signals of the automatic mode are turned off to check the L_IN and R_IN ports. At this time, if the voltage level of L_IN or R_IN port is high, the driver has operated the turn indicator switch, so the automatic mode is canceled and immediately enters the manual mode so that the driver's center can be controlled by the turn indicator switch.

Directional Judgment (2)

The direction determination unit 2 is a circuit for automatically detecting the driving direction of the vehicle at the time of automatic mode switching. As shown in FIGS. 2 and 3, the acceleration sensor 21, the tilt measuring unit 22, and the threshold value are compared. The circuit including the unit 23 may be configured to determine left and right directions and sudden stop, or may use an output value of the steering wheel steering angle sensor instead of the acceleration sensor.

The acceleration sensor 21 preferably uses three or more X, Y, and Z axes, and one or two axis acceleration sensors may also be used.

According to the first embodiment of the direction determination method, the gravity acceleration of each of the three axes (X, Y, Z) of the acceleration sensor is measured according to the configuration of FIG. 2, and the vehicle without tilting forward, backward, left, and right is stopped on the ground without slope. Theoretically, the values are Z = 0, Y = 0, and -X = g. Where g is 1 gravity acceleration.

However, when the direction determination unit of the present invention with the built-in acceleration sensor is mounted on the vehicle, the X, Y, and Z axes each have a constant gravity acceleration according to the degree of inclination of the vehicle, the mounting angle of the direction determination unit, and the like.

In addition, the slope of the ground on which the vehicle progresses while the vehicle is running is always changed, and the characteristics of the acceleration sensor 21 also have a certain deviation due to the influence of the operating temperature.

The tilt measuring unit 22 measures the gravitational acceleration acting on each of the three axes of the vehicle at the time of stopping or at the same speed, that is, the tilt value of the three axes, to minimize the measurement error of the slope and parts of the ground. Standard gravity acceleration value).

The 3-axis gravitational acceleration value (X, Y, Z) of the acceleration sensor 21 is input to the HPF (High Pass Filter) 221 of the tilt measurement unit 22 and the output of the HPF is stored in the existing Is compared with threshold 1 (222).

When the output value of the HPF 221 is high, it means that there is a lot of displacement in the output value of the acceleration sensor, which means that the vehicle is accelerating, decelerating, or rotating. However, if there is a noise of the basic accelerometer and the vehicle is started, the acceleration value of the three axes changes due to factors such as vibration, so that the vehicle stops or is constant at a certain level, i.e. The output of the comparator 1 223 is maintained at LOW (OFF) by determining that the vehicle is traveling.

The threshold value 1 (222) can be selected by changing the values stored in the Lookup table. If the threshold value is small, more accurate vehicle tilt measurement is possible, but the calculation time is longer and the update of the reference slope value becomes slower, so that the adaptive control characteristic The disadvantage is that the higher the threshold value, the faster the update time of the reference slope value is, so the adaptive control efficiency is better, but the sophisticated vehicle tilt measurement is relatively difficult.

The output value of comparator 1 223 is connected to LPF2 (Low Pass Filter) 224, which measures the actual reference slope value (reference gravity acceleration). When the output of comparator 1 223 is high, the vehicle is not accelerating / decelerating. Or the vehicle is in rotation, the vehicle tilt value cannot be obtained and thus the LPF2 224 is reset.

However, if the output of comparator 1 is not applied to High for a certain period of time by applying a timer, the vehicle is considered to be stationary or at constant speed. The gradient value register 225 is stored.

The function of the inclination measuring unit 22 enables the adaptive control system by continuously measuring the inclination of the ground on which the vehicle is driven to be used as a reference gravity acceleration value for measuring acceleration / deceleration and rotational acceleration of the vehicle.

The reference slope is input to the threshold comparison unit 23 to compare the gravity acceleration measurement of the acceleration sensor 21 with respect to three axes of X, Y, and Z. The gravity acceleration measurement allows the instantaneous noise and the like to be filtered by the LPF 231.

The output value of the LPF 231 and the reference slope value (reference gravity acceleration value) of the slope measuring unit 22 are compared with the threshold value 232 to determine the direction change when exceeding the range of the threshold value, and corresponding direction When the ON output is sent to the switch, the direction indicator flashes.

The second embodiment of the direction determination is a method of measuring only the displacement difference of the acceleration sensor gravitational acceleration according to the configuration of FIG.

The first embodiment described above always has a constant gravity acceleration value for each of the three axes, but since the second embodiment detects only the displacement difference between the previous measurement acceleration and the current measurement acceleration, the second embodiment of the direction determination unit Implemented as a circuit having the configuration as shown in FIG.

The displacement value input by the acceleration sensor 41 has a value close to the value of Zero in all three axes when the vehicle is stopped.

The filter unit 42 is composed of the HPF 421 and LPF 422. Since the displacement value output by the HPF 421 has a relatively high frequency noise, the characteristic of averaging the output value of the HPF 421 LPF 422 is used to filter the continuous variation of the vehicle acceleration displacement value of HPF 421, ie low frequency components.

The acceleration displacement values of each of the three filtered axes are compared with the output of the gradient measuring unit 44 through the threshold comparison unit 43.

The inclination measuring unit 44 has the same configuration as the inclination measuring unit of the first embodiment. Unlike in the first embodiment, the reference gravity acceleration (reference slope value) is directly input to the threshold comparison unit, and this value is weighted in the acceleration measurement method. The weighting value corresponding to the Lookup table 45 is transmitted to the comparator 43.

In the second embodiment, since the output of the HPF 421 is all zero in each of the three axes, the reference inclination value is not necessary, but the acceleration displacement value of each of the three axes output from the HPF is the inclination value of each axis (gravity acceleration value). Because it has a correlation with

In other words, assuming that the magnitude of acceleration through the inertia motion is the same, the difference in acceleration displacement becomes small when the reference gravity acceleration is large, whereas the difference in acceleration displacement becomes large when the reference gravity acceleration is small. Therefore, the weight value serves to correct this acceleration displacement difference.

The threshold value 431 is a threshold value for the acceleration displacement difference, and the operation of the comparator 43 or the operation of other components may be applied in the same manner as in the first embodiment.

The third embodiment of the direction determining portion uses the steering wheel steering angle and the output of the steering torque sensor as inputs.

The steering angle of the steering wheel (handle) to the left or right is input from the steering wheel steering angle sensor of the power steering system, and the torque value when the driver turns the steering wheel is input from the steering torque sensor.

If the steering angle information is detected by comparing the steering angle information with the corresponding threshold value, it is determined that the information is High, and the steering torque information is input and compared with the corresponding threshold value to determine whether the threshold value is exceeded.

The signal output of the direction indicator may be determined based on the steering angle information, and may be based on a condition in which the steering torque signal is simultaneously activated, or the direction indicator signal may be activated only by the steering angle information regardless of the steering torque signal.

Signal output section (3)

The signal output unit 3 is an output terminal of a signal output as a result of the direction detection of the direction determination unit 2, and generates a lighting signal so that it flashes like a conventional direction indicator light.

In the conventional direction indicator control circuit as shown in FIG. 4, when the driver selects the direction indicator switch to the left or the right (when the indicator indicator lever is operated), a flasher unit that generates a square pulse wave of a certain period (aka flashing relay or indicator lamp relay) (A) is the electrical connection with the left or right turn indicators to flash the turn indicators periodically.

That is, the turn indicators only operate when the driver operates the turn indicator switch or the emergency light switch. In exceptional cases, when an external signal (ETACM input) is applied, the emergency light relay is activated and the turn indicator flashes.

The signal output unit 3 of the present invention may be connected to the flasher unit to flash the direction indicator using the flashing cycle of the flasher unit.

That is, according to the result of the direction determination unit 2, by controlling the ports of the right (R_OUT) and the left (L_OUT), the corresponding relay is turned on, and the output signal of the flasher unit is connected to the corresponding direction indicator to enable the blinking operation of the direction indicator. Let's do it.

If the car turns left, the L_OUT output is turned on and the left turn indicator and left turn indicator flash. If it is turned to the right, the R_OUT output turns on and the right turn indicator and right turn indicator flash. The flashing period of is determined by the output pulse period of the flasher unit.

The signal output unit 3 may include a timer and output a signal in the form of a periodic intermittent waveform to perform a flashing operation of the left and right direction indicators, and check the voltages of the L_IN and R_IN ports to indicate the direction indicator of the driver. If High is detected, the driver has operated the direction indicator switch. Therefore, the automatic mode is immediately canceled and the output of the flasher unit is connected to the direction indicator.

That is, in the automatic mode, the direction indicator light is controlled by the relay, and in the manual mode, the direction indicator light is controlled by the flasher unit. The flashing cycle of the direction indicator is the ON / OFF cycle of the built-in timer in the automatic mode and the output wave cycle of the flasher unit in the manual mode.

The direction indicator control system is to indicate whether the direction indicator flashes on the dashboard of the vehicle at the same time as the direction indicator, the present invention is connected to the conventional control system to add the automatic and manual switching function, but to provide the same results as before It is possible to increase the applicability to the existing vehicle by providing the integrated direction indicator light to enable automatic / manual switching function by replacing only the direction indicator light.

However, when the integrated direction indicator is implemented as shown in FIG. 5, the vehicle dashboard may not be displayed in the automatic mode, and the automatic signal unit is coupled to the end of the manual mode circuit. In the case of detecting the manual operation signal from the terminal and being LOW continuously for a predetermined period, the signal output unit sends out a lighting signal by its own timer to flash the direction indicator in accordance with the signal of the direction determination unit, and then the signal of the internal direction indicator signal When HIGH is configured to transfer the manual operation signal of the internal terminal to the signal output unit (BYPASS).

Hereinafter, the technical features of the present invention will be described in more detail with reference to specific circuit diagrams.

6 is a circuit structure of a turn signal control system according to the present invention.

In the present invention, the relays R1 and R2 are connected to the left and right turn indicators and the control of R1 and R2 is controlled by the L_OUT and R_OUT signals of the automatic signal unit.

Normally, the R_IN and L_IN ports of the automatic signal section always monitor whether the direction indicators are lit. That is, if both the R_IN and L_IN ports remain low for a certain period of time, the driver determines that the turn signal switch has not been operated and enters the automatic mode.

In the automatic mode, when the operation of the internal circuit of the automatic signal unit detects a rotational operation such as changing the lane of the car, it controls the ports of R_OUT and L_OUT and turns on the R1 or R2 relay to connect the output signal of the flasher unit to the corresponding direction indicator. Enables blinking of the indicator.

If the vehicle turns left, the L_OUT output is turned on and the left turn indicator and left turn indicator flash. If it is turned to the right, the R_OUT output turns on and the right turn indicator and right turn indicator flash. The blinking period of the direction indicator is determined by the output pulse period of the flasher unit.

The automatic signal unit monitors the R_IN and L_IN ports at all times. Even when the vehicle is changed direction and is operating in the automatic mode, the R_IN and R_IN ports are periodically checked by turning off both the R_OUT and L_OUT ports. If the level is high, the driver has operated the turn signal switch. Therefore, even if it is determined that the turn signal is changed by the automatic signal part, the auto mode is canceled and the vehicle enters the manual mode immediately so that the driver's center can be controlled by the turn signal switch.

In other words, if the direction switch characteristic is determined by the automatic signal part when the direction indicator switch is not operated, the automatic signal part operates in the automatic mode that controls the blinking function of the direction indicator light. When the direction indicator switch is operated, the automatic signal part stops the output operation and the direction indicator light is turned on. It operates in manual mode of operator control through switch control.

7 is another embodiment of a turn signal control circuit according to the present invention.

When the inputs of the R_IN and L_IN ports of the automatic signal part are in the LOW state for a certain period, the automatic signal part operates in the automatic mode. That is, when the automatic signal unit determines the direction change characteristic, L_OUT and R_OUT, which are output signals of the automatic signal unit, control the relays R1 and R2, and are output in the form of periodic interruption waveforms by a timer embedded in the automatic signal unit. Enables blinking of direction indicators.

When the output of L_OUT or R_OUT repeating the intermittent output is OFF, the automatic signal unit checks the voltage of the L_IN and R_IN ports and checks whether the driver turns the indicator light switch. Since the automatic mode of the automatic signal part is canceled immediately, R_OUT and L_OUT are applied to LOW to turn off the relays R1 and R2, and the output of the flasher unit is connected to the direction indicator.

In the automatic mode, the direction indicators are controlled by the relays R1 and R2. In the manual mode, the direction indicators are controlled by the flasher unit. The blinking period of the direction indicator is the ON / OFF cycle of L_OUT and R_OUT, which are the outputs of the automatic signal section in the automatic mode, and the output wave cycle of the flasher unit in the manual mode.

8 is a circuit in which the indicator is integrally implemented, and the automatic signal unit determines the direction change of the vehicle and flashes the corresponding indicator with a switch connected to a lamp (bulb).

At this time, R_OUT (L_OUT) is a rectangular pulse signal with a certain period and R_IN (L_IN) signal is a direction change signal at the internal terminal of the turn indicator case of the vehicle.

That is, when the R_IN (L_IN) signal is LOW continuously for a certain period, the automatic signal part operates in automatic mode. If the R_IN (L_IN) signal is detected as high, then the automatic mode of the automatic signal part is released and the R_IN (L_IN) signal is It is bypassed by R_OUT (L_OUT) signal to operate in manual mode.

This structure can be mounted on vehicles in a one-to-one exchange with each turn indicator bulb. On the other hand, the direction board signal inside the vehicle does not turn on.

The above-described automatic signal unit is to determine its performance according to the sensitivity and accuracy of the sensing function of the direction determining unit, which is an internal configuration thereof, and FIGS. 10 to 12 illustrate circuit configurations of the direction determining unit.

The direction determining unit of the present invention can be broadly realized by two methods using an acceleration sensor and a steering wheel steering angle / torque sensor.

10 and 11 illustrate a case in which the direction change measurement and the determination control thereof are performed when the vehicle is rotated by using the acceleration sensor (first embodiment of the direction determining unit).

As shown in FIG. 9, the acceleration sensor of the present invention preferably uses three axes of X, Y, and Z, and one and two axes of acceleration sensors may also be used.

The acceleration sensor of the present invention can be implemented in two ways, a tilt measurement method and an acceleration measurement method.

Direction measurement method is to measure the acceleration of gravity of each of the three axes (X, Y, Z) of the acceleration sensor. When the vehicle is mounted as shown in FIG. Theoretically, Z = 0, Y = 0, and -X = g.

Where g is 1 gravity acceleration. However, when the direction determiner of FIG. 10 having the actual acceleration sensor is mounted on the vehicle, the X, Y, and Z axes each have a constant gravity acceleration according to the degree of inclination of the vehicle, the mounting angle of the front and rear sides, and the mounting angle of the automatic signal unit.

In addition, the slope of the ground on which the vehicle progresses is always changed newly while the vehicle is in operation, and the characteristics of the acceleration sensor also have some deviation due to the influence of the operating temperature.

The tilt measuring unit of FIG. 10 measures the gravitational acceleration acting on each of the three axes of the vehicle at the time of stopping or at the same speed, that is, the inclination of the three axes to minimize the measurement error of the ground inclination and parts, such as the reference slope value (reference gravity Acceleration value).

The 3-axis gravitational acceleration value (X, Y, Z) of the acceleration sensor is input to the HPF (high band filter) of the tilt measurement unit, and the output of the HPF is compared with the threshold value 1 previously stored.

If the output value of HPF is high, it means that there is a lot of displacement in the output value of the acceleration sensor, which means that the vehicle is accelerating, decelerating or rotating. However, if there is a noise of the basic accelerometer and the vehicle is started, the acceleration value of the three axes changes due to factors such as vibration, so that the vehicle stops or is constant at a certain level, i.e. The output of the comparator 1 is kept low (OFF) by determining that the vehicle is traveling.

The threshold 1 value can be changed to the values stored in the existing Lookup table by the sensitivity selection switch. If the threshold value is small, more accurate vehicle tilt measurement is possible, but the calculation time is too long, so the update of the reference slope is slowed down. This disadvantage is disadvantageous, and the higher the threshold value, the faster the update time of the reference slope value is, so the adaptive control efficiency is better, but the sophisticated vehicle tilt measurement is relatively difficult.

The output value of comparator 1 is connected to LPF2 and timer 1, which measure the actual reference slope (reference gravity acceleration). If the output of comparator 1 is high, the vehicle's slope value cannot be obtained because the vehicle is accelerating / decelerating or rotating. Reset LPF2 and timer1.

However, if the output of comparator 1 is not applied as high during a certain period of time, i.e. during the period stored in timer period register 1, the vehicle is considered to be stationary or running at constant speed, and the output of LPF2, which is a gravity acceleration measurement for each of these three axes, is output. This SW1 is turned ON and stored in the reference slope value register.

The function of the inclination measuring unit enables the adaptive control system by continuously measuring the inclination of the ground on which the vehicle is driven to be used as a reference gravity acceleration value for measuring acceleration / deceleration and rotational acceleration of the vehicle. The reference slope is compared with the output of LPF1 in comparator 2 for each of the three axes. LPF1 receives the input of the acceleration sensor and filters the instantaneous noise among the input signals. The detailed operation of comparator 2 is as follows.

Equation 1

if ((LPF1 Output (Y Axis)> Reference Slope Value (Y Axis) + THY): Turn Right;

            (LPF1 output (Y-axis) <reference slope value (Y-axis)-THY): turn left;

            (LPF1 output (Z axis) <reference slope value (Z axis)-THZ): sudden stop; )

else

         (L_OUT = 0; R_OUT = 0;)

THY and THZ are the threshold values of the y and z axes stored in the threshold register 2, and the output value of LPF1, that is, the gravitational acceleration of each of the three axes currently measured, is the reference slope value measured in the stationary or constant velocity state. Gravity acceleration value) is compared with the range of thresholds such as THY and THZ.

If it is judged as right turn in Equation 1, output of comparator 2 sends ON output to R_OUT port. If it is determined to turn left, the ON output is sent to the L_OUT port. If it is determined to be suddenly stopped, the emergency light flashes by sending the ON signal to the R_OUT and L_OUT ports simultaneously.

The timer 2 operates when the automatic signal unit is applied to the structure of FIG. 7 or 8 and repeatedly flashes the L_OUT and R_OUT signals by repeating the toggle of ON / OFF for the period stored in the timer period register 2.

When applied to FIG. 6, since the blinking function is controlled by the flasher unit, the timer 2 and the timer period register 2 are not necessary.

Timer 3 is a timer for periodically checking in the automatic mode to check whether the driver has operated the direction indicator switch as described above, and when the high signal is input from the L_IN or R_IN port during the check operation of the comparator 3, Recognize that the indicator switch has been operated and switch SW3 off to release the automatic mode.

FIG. 11 illustrates a case in which the direction change is measured and determined by the acceleration measurement method (second embodiment of the direction determiner).

Acceleration measurement method is a method of measuring the acceleration of gravity of each of the three axes (X, Y, Z) of the acceleration sensor while the direction measurement method measures only the displacement difference of gravity acceleration. That's how it is.

The direction measurement method always has a constant gravity acceleration value for each of the three axes, but the acceleration measurement method detects only the displacement difference between the previous measurement acceleration and the current measurement acceleration, so the output value of the HPF1 is three axes when the vehicle is stopped. All have values close to zero.

LPF1 has the characteristic of averaging the output value of HPF1, which is used to filter the continuous change of displacement value, ie low frequency component, because the HPF1 vehicle acceleration displacement value has a relatively high frequency noise.

The acceleration displacement values of each of the three filtered axes are compared with the output of the aforementioned tilt measurement unit through the comparator 2.

Unlike the direction measurement method, which directly inputs the reference gravity acceleration (reference slope value) to the comparator 2, the acceleration measurement method transmits this value to the weighted lookup table and transmits the corresponding weight value to the comparator 2.

In the case of acceleration measurement method, since the output of HPF1 is all zero in each of three axes, the reference slope value is not necessary, but the acceleration displacement value of each of the three axes output from HPF1 is correlated with the slope value (gravity acceleration value) of each axis. Because there is.

In other words, assuming that the magnitude of acceleration through the inertia motion is the same, the difference in acceleration displacement becomes small when the reference gravity acceleration is large, whereas the difference in acceleration displacement becomes large when the reference gravity acceleration is small.

Therefore, the weight value serves to correct this acceleration displacement difference. THZ 'and THY' THX 'of the threshold register 2 are threshold values for the acceleration displacement difference, and the operation method of the comparator 2 is the same as the Direction method.

The functions of Timer 2 and Timer 3 are the same as in Direction.

Fig. 12 is a circuit diagram when the direction is determined using the steering wheel steering angle and the steering torque sensor (third embodiment of the direction determining unit).

The steering angle of the steering wheel (handle) to the left or right of the steering wheel (handle) of the power steering system is input as input, and the torque value from the steering torque sensor when the driver turns the steering wheel as an input.

Comparator 1 receives the steering angle information as an input and compares the steering angle with the threshold 1 to detect the steering angle exceeding the threshold 1 and inputs the information to the determination unit with L or R as high.

Comparator 2 receives the steering torque information and compares it with the value of threshold 2 and provides it to the determination unit when the threshold is exceeded.

The judging unit activates the corresponding output port (L_OUT or R_OUT) according to the output value L or R of the comparator 1 when the value of the comparator 2 is set to high, or L_OUT using only the output value of the comparator 1 regardless of the output value of the comparator 2. Alternatively, the R_OUT port can be activated. The functions of timer 1 and timer 2 are as described above.

1 is an overall configuration diagram of a turn signal control system according to the present invention.

Figure 2 is a block diagram of a first embodiment of the direction determination unit according to the present invention.

3 is a block diagram of a second embodiment of the direction determination unit according to the present invention.

4 is a circuit diagram of a direction indicator light control system by a conventional manual operation.

5 is a configuration diagram when the direction indicator light control system according to the present invention is integrated with the direction indicator light.

6 is a circuit diagram including an automatic signal unit according to the present invention.

7 is another embodiment of a circuit configuration including an automatic signal unit according to the present invention.

8 is a circuit diagram of an automatic signal unit integrated with a direction indicator in accordance with the present invention.

9 is a conceptual diagram of the installation of the acceleration sensor of the direction determination unit according to the present invention.

10 is a circuit diagram of a direction determining unit according to the first embodiment of the present invention.

11 is a circuit diagram of a second embodiment of the direction determining unit according to the present invention;

12 is a circuit diagram of a third embodiment of the direction determining unit according to the present invention;

<Description of the major reference numerals>

1: Mode switching part 2: direction determination part

3: signal output unit 21, 41: acceleration sensor

22, 44: tilt measurement unit 23, 43: threshold value comparison unit

Claims (12)

delete delete delete delete delete delete delete delete When the turn indicator switch is operated manually, the flasher unit generates a lighting signal having a flashing cycle and sends it to the corresponding direction indicator and the instrument panel, but automatically detects the direction of movement of the vehicle and sends a lighting signal to the corresponding direction indicator. The automatic signal unit further comprises: a mode switching unit for driving a corresponding circuit by determining an automatic mode switching time point when there is no manual operation; A direction determination unit which automatically detects the rotational direction of the vehicle by the internal circuit after the automatic mode switching; And a signal output unit for outputting a driving signal to a corresponding direction indicator in response to the rotation direction detected by the direction determining unit. When there is a manual operation, the direction indicator is turned on according to a switch signal by manual operation, and manual In the case of no operation, the mode switching unit determines the automatic mode switching time and drives the direction determining unit to output a signal to automatically turn on the direction indicator in accordance with the driving direction of the vehicle in the direction indicator control system of the vehicle , The direction determining unit is implemented by a tilt measurement method using an acceleration sensor, and the three-axis gravity acceleration values (X, Y, Z) of the acceleration sensor are input to the HPF (high band filter) of the tilt measurement unit and the output of the HPF. Is compared with the previously stored threshold value 1, and when the threshold value is not exceeded, it is determined that the vehicle is stationary or constant speed driving, and the output of the comparator 1 remains LOW (OFF), and the value of the threshold value 1 is It can be changed to the values stored in the existing Lookup table by the sensitivity selection switch, and the output value of Comparator 1 is connected to LPF2 and Timer1, which measure the actual reference slope (reference gravity acceleration), and the output of Comparator 1 is High. LPF2 and Timer1 are reset during the period. If the output of Comparator 1 is not applied as High during the period stored in Timer Period Register 1, the output of LPF2, the gravity acceleration measurement value for each of the three axes, is SW. 1 is turned ON and stored in the reference slope value register, and the reference slope value is compared with the output value of LPF1 at each comparator 2 for each of three axes, and LPF1 receives the input of the acceleration sensor and filters instantaneous noise among the input signals. Comparator 2 is 『If ((LPF1 output (Y axis)> Reference slope value (Y axis) + THY): Turn right;            (LPF1 output (Y-axis) <reference slope value (Y-axis)-THY): turn left;            (LPF1 output (Z axis) <reference slope value (Z axis)-THZ): sudden stop; )       else           (L_OUT = 0; R_OUT = 0;)   Here, THY, THZ is a direction indicator control system of the vehicle, characterized in that configured to output a signal to the corresponding port by judging the direction change and sudden stop based on the threshold value of the y, z-axis stored in the threshold register 2 . When the turn indicator switch is operated manually, the flasher unit generates a lighting signal having a flashing cycle and sends it to the corresponding direction indicator and the instrument panel, but automatically detects the direction of movement of the vehicle and sends a lighting signal to the corresponding direction indicator. The automatic signal unit further comprises: a mode switching unit for driving a corresponding circuit by determining an automatic mode switching time point when there is no manual operation; A direction determination unit which automatically detects the rotational direction of the vehicle by the internal circuit after the automatic mode switching; And a signal output unit for outputting a driving signal to a corresponding direction indicator in response to the rotation direction detected by the direction determining unit. When there is a manual operation, the direction indicator is turned on according to a switch signal by manual operation, and manual In the case of no operation, the mode switching unit determines the automatic mode switching time and drives the direction determining unit to output a signal to automatically turn on the direction indicator in accordance with the driving direction of the vehicle in the direction indicator control system of the vehicle , The direction determining unit is implemented by a method of measuring only the displacement difference of gravity acceleration by the acceleration sensor, and the acceleration displacement value LPF1 of each of the three axes filtered by the filter unit is compared with the output of the tilt measuring unit through the comparator 2. The output of the slope measuring unit is transmitted to a weighted lookup table, converted to a corresponding weighted value, and transmitted to the comparator 2. The comparator 2 is configured to output a signal to a corresponding port by determining a direction change and sudden stop by comparing with a threshold value. Turn signal control system for cars. When the turn indicator switch is operated manually, the flasher unit generates a lighting signal having a flashing cycle and sends it to the corresponding direction indicator and the instrument panel, but automatically detects the direction of movement of the vehicle and sends a lighting signal to the corresponding direction indicator. The automatic signal unit further comprises: a mode switching unit for driving a corresponding circuit by determining an automatic mode switching time point when there is no manual operation; A direction determination unit which automatically detects the rotational direction of the vehicle by the internal circuit after the automatic mode switching; And a signal output unit for outputting a driving signal to a corresponding direction indicator in response to the rotation direction detected by the direction determining unit. When there is a manual operation, the direction indicator is turned on according to a switch signal by manual operation, and manual In the case of no operation, the mode switching unit determines the automatic mode switching time and drives the direction determining unit to output a signal to automatically turn on the direction indicator in accordance with the driving direction of the vehicle in the direction indicator control system of the vehicle , The direction determining unit receives a turning angle to the left or right of the steering wheel (handle) from the steering wheel steering angle sensor of the power steering system, and receives a torque value when the driver turns the steering wheel from the steering torque sensor, and the comparator 1 receives steering angle information. If the steering angle exceeding the threshold 1 is detected by inputting it as an input, the information is inputted to the judging unit with L or R as high, and the comparator 2 receives the steering torque information and the value of the threshold 2 If the threshold value is exceeded, the controller provides this to the judging unit. If the comparator 2 is input as High, the judging unit activates the corresponding output port (L_OUT or R_OUT) according to the output value L or R of the comparator 1. Or, the direction indicator control system of the vehicle, characterized in that configured to activate the L_OUT or R_OUT port with only the output value of the comparator 1 irrespective of the output value of the comparator 2. . 12. A vehicle turn signal to which the turn signal control system according to any one of claims 9 to 11 is applied.

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