JP4180989B2 - Car auto light system - Google Patents

Description

  The present invention relates to an automobile autolight system.

  The auto light system of an automobile detects the illuminance of light from outside the vehicle and automatically turns on the light when the illuminance falls below a predetermined lighting setting illuminance, while the illuminance is higher than the predetermined lighting setting illuminance The light is automatically turned off when the height becomes too high.

In Patent Document 1, each of the plurality of light receiving sensors is provided at a predetermined position of the vehicle, and the brightness of the vehicle traveling direction is estimated based on the received light intensity information from each of the light receiving sensors, and according to the estimation result. An auto light control device having a control unit capable of controlling the turning on / off of light is disclosed. And according to this, it is described that it is possible to prevent malfunctions such as turning on for a moment during daytime turning off or turning off for a moment while turning on at night.
JP 9-315209 A

  The auto light system of an automobile detects the illuminance of light from the outside with an illuminance sensor, the detected illuminance becomes darker than the predetermined illuminance, and further, the light is turned on when traveling for a predetermined distance or when a predetermined time has elapsed. There is something that controls to light up. That is, the lighting control of the light is performed by determining whether or not a predetermined light lighting condition is satisfied.

  FIG. 9 shows such an autolight system 100 of the automobile C.

  In the automatic light system 100 shown here, the lighting control of the taillight or headlight light 170 is controlled by the microcomputer 110 to which the illuminance sensor 120 for detecting the illuminance of light from the outside of the vehicle and the vehicle speed sensor 130 for detecting the vehicle speed are respectively connected. Done. The microcomputer 110 is turned on / off to the power supply device 150 by turning on / off the ignition switch 140. The microcomputer 110 incorporates an ambient illuminance calculation processing device 111, and information from the illuminance sensor 120 is input to the microcomputer 110, and calculates the illuminance of light from outside the vehicle. Further, the microcomputer 110 has a mileage calculation processing device 112 incorporated therein, and information from the vehicle speed sensor 130 is input to the microcomputer 110. The illuminance of light from outside the vehicle is lower than a predetermined illuminance. Or the distance traveled after it becomes higher. Further, the microcomputer 110 includes a lighting / light-off condition determination processing device 113, to which an ambient illuminance calculation processing device 111, a mileage calculation processing device 112, and a time measurement timer 115 are connected, respectively. Based on the above, it is determined whether the light lighting condition or the light extinction condition is satisfied. Further, the microcomputer 110 includes an output control device 114, to which judgment information of the lighting / light-off condition judgment processing device 113 is input, and based on this information, the taillight or headlight light 170 is controlled. Turn on / off control.

  However, when a large electric noise is applied to the microcomputer 110 from the outside while the automobile C is traveling, or when the electric wire supplying power to the microcomputer 110 is about to be cut off, the supplied power becomes unstable. In this case, the reset circuit 160 operates and the microcomputer 110 is reset, so that information for determining whether the lighting condition is satisfied may be initialized and lost. Then, for example, when the microcomputer 110 is reset while the light 170 is lit, the light 170 is turned off until the predetermined light lighting condition is satisfied again after returning from the reset. Specifically, as shown in FIG. 10, in the case of a light lighting condition in which the light 170 is turned on when the illuminance is darker than a predetermined illuminance and the vehicle travels 30 meters, the vehicle travels at 60 km / h with the light 170 on. If the microcomputer has been reset, the light 170 is turned off for at least 1.8 seconds after the microcomputer is in the reset state and after returning from the reset. As described above, when the light 170 suddenly turns off during traveling and it takes a long time to turn on again, safe driving is hindered.

  The present invention has been made in view of such a point, and the object of the present invention is to promptly return to the state before resetting after returning from reset even when the microcomputer is reset while driving with the light turned on. The object is to provide an autolight system for automobiles returning to the factory.

The present invention for achieving the above object
A microcomputer that is controlled to turn on the light by determining whether or not a predetermined light lighting condition is satisfied in the engine driving state, while being reset in the engine stopped state ;
A memory for storing light on / off state information,
When the microcomputer is reset in the engine driving state and is initialized by losing information for determining whether the lighting condition is satisfied, the memory stores and holds the lighting on / off state information of the light immediately before the reset, When the microcomputer subsequently returns from reset, it reads the light on / off state information from the memory, and based on that information, restores the light on / off state to the state before reset ,
The memory stores a point off state information of the light at that time in the case of running at a speed above a predetermined speed, you store information associated with the light is off otherwise.

  According to the above configuration, even when the microcomputer is reset, the light on / off state information immediately before the reset is read from the memory when returning from reset, and the light on / off state is determined based on the information. Restore the state before resetting. Therefore, even if the microcomputer is reset while the light is lit, there is no need to wait until the predetermined light lighting condition is satisfied again after returning from the reset, and the light is turned on immediately after returning from the reset. be able to.

Further, since also reset when the microcomputer stops the engine, when the memory stores a point off state information of the light at that time constantly if light comes on when the engine is stopped, then The light will turn on when the engine is started. However, according to the above configuration, only when the vehicle is traveling at a predetermined vehicle speed or higher, the memory stores the light on / off state information at that time, and in other cases, the light is turned off. Since the information is stored, the function of restoring the light on / off state to the state before the reset when the microcomputer is reset works only while the automobile is running.

  In the present invention, the microcomputer may determine whether or not the illuminance of light from outside the vehicle is lower than a predetermined illuminance as a light lighting condition.

  In this case, according to the present invention, the microcomputer may determine whether or not the traveling distance after the illuminance of light from outside the vehicle is lower than the predetermined illuminance is longer than the predetermined distance and / or the illuminance of light from outside the vehicle. It may also be determined as a light lighting condition whether or not an elapsed time from when the brightness becomes lower than a predetermined illuminance is longer than a predetermined time.

  According to the above configuration, a conditional filter based on the distance traveled and / or the elapsed time after dark has been applied, so it is possible to prevent the lights from turning on unnecessarily when passing under a shade or under a footbridge. can do.

  As described above, according to the present invention, even if the microcomputer is reset while the light is lit, there is no need to wait until the predetermined light lighting condition is satisfied again after returning from the reset. The lights can be turned on as soon as possible after returning to the factory.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows an autolight system 100 for an automobile C according to an embodiment of the present invention.

  In this auto light system 100, the microcomputer 110, to which an illuminance sensor 120 for detecting the illuminance of light from the outside of the vehicle and a vehicle speed sensor 130 for detecting the vehicle speed, are respectively connected, controls the turning on / off of the light 170 of the taillight or headlight. Is.

  The microcomputer 110 is turned on / off to the power supply device 150 by turning on / off the ignition switch 140. The microcomputer 110 incorporates an ambient illuminance calculation processing device 111, and information from the illuminance sensor 120 is input to the microcomputer 110, and calculates the illuminance of light from outside the vehicle. Further, the microcomputer 110 has a mileage calculation processing device 112 incorporated therein, and information from the vehicle speed sensor 130 is input to the microcomputer 110. The illuminance of light from outside the vehicle is lower than a predetermined illuminance. , Or the distance traveled since it became higher, in other words, the distance traveled since a travel distance counter (not shown) was initialized. Further, the microcomputer 110 includes a lighting / light-off condition determination processing device 113, to which an ambient illuminance calculation processing device 111, a mileage calculation processing device 112, and a time measurement timer 115 are connected, respectively. Based on the above, it is determined whether the light lighting condition or the light extinction condition is satisfied. Further, the microcomputer 110 includes an output control device 114, to which judgment information of the lighting / light-off condition judgment processing device 113 is input, and based on this information, the taillight or headlight light 170 is controlled. Turn on / off control.

  Here, the light lighting condition determined by the lighting / lighting condition determination processing device 113 is that the illuminance of light from the outside of the vehicle is darker than the predetermined illuminance and the vehicle has traveled a predetermined distance or has elapsed a predetermined time since then. On the other hand, the condition for turning off the light is that the illuminance of light from the outside of the vehicle is brighter than the predetermined illuminance and whether or not the vehicle has traveled a predetermined distance or a predetermined time has passed. is there. In this way, as a light lighting condition, not only that the illuminance of light from the outside of the vehicle is darker than the predetermined illuminance, but also a condition filter based on the distance traveled or the elapsed time after dark, it will be filtered, so It is possible to prevent the light 170 from turning on in an unnecessarily responsive manner when it becomes dark for a short time, such as when passing under a pedestrian bridge. In addition, since a condition filter based on the distance traveled or the elapsed time after being brightened is applied, the light 170 is unnecessarily reacted in response to a case where the light becomes bright for a short time such as when passing near a streetlight. It can be prevented from turning off.

  The auto light system 100 is provided with a memory 180 for storing information about the lighting / lighting state of the light 170. When a large electric noise is loaded from the outside while the automobile C is traveling, the microcomputer 110 is reset by the reset circuit 160 operating because the supplied power becomes unstable. As a result, the information for determining whether the lighting condition is satisfied, such as the illuminance of light from the outside of the vehicle, the travel distance, or the elapsed time, is lost and initialized. The light on / off state information of the light 170 is read, and the light on / off state of the light 170 is restored to the state before the reset based on the information. Therefore, even if the microcomputer 110 is reset while the light 170 is lit, there is no need to wait for the predetermined light lighting condition to be satisfied again after returning from the reset, and immediately after the return from reset. 170 can be lit. However, the memory 180 stores the light-on / off state information of the light 170 at that time only when the vehicle is traveling at a predetermined vehicle speed or higher, and information associated with the fact that the light-light-off condition is satisfied otherwise. It comes to memorize. Accordingly, when the microcomputer 110 is reset, the function of restoring the light-off state of the light 170 to the state before the reset functions only when the automobile C is traveling. When the memory 180 always stores the light-on / off state information of the light 170 at that time, the microcomputer 110 is also reset when the engine is stopped. The light 170 is also turned on when the engine is driven. However, this situation can be avoided.

  Next, a control method of the auto light system 100 will be described based on the flowcharts shown in FIGS. These control processes are performed by the microcomputer 110 of the auto light system 100.

  FIG. 2 shows a main flowchart.

  In step A after the auto light system 100 is started, first, the light 170 lighting / lighting state information, that is, the light lighting condition is established, or the light extinction condition is established. A process of reading information from the memory 180 is performed, and the process proceeds to the subsequent step B.

  In step B, a process for calculating ambient illuminance is performed, and the process proceeds to subsequent step C.

  In step C, a process for calculating the travel distance is performed, and the process proceeds to subsequent step D.

  In step D, processing for determining whether or not the lighting / lighting condition is satisfied is performed, and the process proceeds to subsequent step E.

  In step E, the process of turning on or off the light 170 is performed, and the process proceeds to the subsequent step F.

  In step F, a process of transferring the light on / off state information of the light 170 to the memory 180 is performed, and the process returns to step B.

  Thus, the main flow is a loop that circulates from step B to step E after step A. That is, this control process is started when the engine of the automobile C is started and is ended when the engine is stopped.

  FIG. 3 shows a flowchart of the process for reading the on / off state information of the light 170 in step A.

  First, in step A1, the light on / off state information of the light 170 is read from the memory 180, and the process proceeds to the subsequent step A2.

  In step A2, the lighting / extinguishing state information is stored in the RAM of the microcomputer 110, and the process returns to the main flow.

  FIG. 4 is a flowchart of the ambient illuminance calculation process in step B.

  First, in step B1, the DC current output detected by the illuminance sensor 120 is detected, and the process proceeds to the subsequent step B2.

  In Step B2, the current is converted into a voltage, and the process proceeds to the subsequent Step B3.

  In Step B3, the voltage analog signal is converted into a digital signal, and the process proceeds to Step B4.

  In step B4, the digital conversion value is converted as the illuminance of light from outside the vehicle, and the process returns to the main flow.

  FIG. 5 shows a flowchart of the travel distance calculation process in step C.

  In step C1, the output of the vehicle speed sensor 130 is detected, and the process proceeds to the subsequent step C2.

  In step C2, a travel distance from the time when a travel distance counter (to be described later) is initialized last time is calculated from the output of the vehicle speed sensor 130, and the process returns to the main flow.

  FIG. 6 shows a flowchart of the turn-on / off condition determination processing in step D.

  First, in step D1, it is determined whether the illuminance of light from the outside of the vehicle is equal to or less than the illuminance for turning on the light 170. If YES, the process proceeds to step D2, and if NO, the process proceeds to step D8.

  In step D2, it is determined whether the illuminance of the light from the outside of the vehicle is equal to or less than the illuminance for turning on the light 170 during the previous lighting / lighting condition determination process. If YES, the process proceeds to step D3. In the case of NO, the process proceeds to step D5 to initialize the time measurement timer 115, and then proceeds to step D6 to initialize the travel distance counter, and then returns to the main flow.

  In step D3, it is determined whether the travel distance from when the travel distance counter was initialized last time is equal to or greater than a predetermined distance. If YES, the process proceeds to step D4. If NO, the process proceeds to step D7 to determine whether the elapsed time since the time measurement timer 115 was previously initialized is equal to or longer than a predetermined time. If YES, the process proceeds to step D4. Return to the main flow.

  In step D4, it is determined that the lighting condition is satisfied, and the process returns to the main flow.

  In step D8, it is determined whether the illuminance of light from outside the vehicle is equal to or greater than the illuminance for turning off the light 170. If YES, the process proceeds to step D9. In the case of NO, the process proceeds to step D5 to initialize the time measurement timer 115, and then proceeds to step D6 to initialize the travel distance counter, and then returns to the main flow.

  In step D9, it is determined whether the illuminance of the light from outside the vehicle is equal to or higher than the illuminance for turning off the light 170 during the previous lighting / lighting condition determination processing. If YES, the process proceeds to step D10. In the case of NO, the process proceeds to step D5 to initialize the time measurement timer 115, and then proceeds to step D6 to initialize the travel distance counter, and then returns to the main flow.

  In step D10, it is determined whether the travel distance from when the travel distance counter was initialized last time is equal to or greater than a predetermined distance. If YES, the process proceeds to step D11. If NO, the process proceeds to step D12 to determine whether the elapsed time since the time measurement timer 115 was previously initialized is equal to or longer than the predetermined time. If YES, the process proceeds to step D11. Return to the main flow.

  In step D11, it is determined that the light extinction condition is satisfied, and the process returns to the main flow.

  In step E, the light 170 is turned on or off according to the determination result in step D.

  FIG. 7 shows a flowchart of the process of transferring the lighting / lighting state information of the light 170 to the memory 180 in step F.

  First, in Step F1, it is determined whether or not the vehicle speed is equal to or higher than the predetermined vehicle speed V. If YES, the process proceeds to Step F2, and if NO, the process proceeds to Step F3.

  In step F2, the light on / off state information of the light 170 is transferred to and stored in the memory 180, and the process returns to the main flow.

  In step F3, information associated with the fact that the light 170 is turned off, that is, that the light extinction condition is satisfied, is transferred to and stored in the memory 180, and the process returns to the main flow.

  As described above, this control process is ended by stopping the engine. At this time, the microcomputer 110 is reset and initialized with all information lost. In addition, even if the microcomputer 110 is loaded with a large electric noise from the outside or the electric wire supplying power is about to be disconnected, the supplied power becomes unstable and the reset circuit 160 operates. May be reset.

  Next, an operation when the microcomputer 110 is reset due to a cause other than the engine stop will be described.

  First, consider a case where the microcomputer 110 is reset while the vehicle C is running at a predetermined speed V or more after the light 170 is turned on. In this case, the control starts from the start of the auto light system 100 when subsequently returning from reset. In step A, the lighting / lighting state information of the light 170 is read from the memory 180. Here, since the automobile C is traveling at a predetermined speed V or higher, the lighting / extinguishing state information of the light 170 is stored in the memory 180 in step F immediately before the microcomputer 110 is reset. Therefore, the microcomputer 110 reads information associated with the fact that the light lighting condition is established in step A. Then, after passing through Step B and Step C, in Step D, the process proceeds to Step D1, Step D2, Step D5, and Step D6. In Step E, the light 170 is turned on and the process continues to Step F. After returning from step F to step B, after passing through step B and step C, in step D, the process proceeds to step D1, step D2, step D3, and step D7, and returns to the main flow. The lighting state is maintained and the process continues to step F. Thereafter, this circulation is repeated until the microcomputer 110 is reset next time due to engine stop or the like, or until NO in step D1 and the process proceeds to step D8. . That is, after the microcomputer 110 returns from reset, the light 170 is immediately turned on without determining whether or not the light lighting condition is satisfied.

  In the prior art, for example, as shown in FIG. 10, in the case of a light lighting condition in which the detected illuminance becomes darker than a predetermined illuminance and the light is turned on when traveling for 30 m, the light is lit at 60 km / h. If the microcomputer is reset during running, the light is not turned on and the vehicle runs without light for at least 1.8 seconds after the microcomputer is in a reset state and after returning from reset. On the other hand, in the auto light system 100 according to the present embodiment, under the same light lighting conditions, even if the microcomputer 110 is reset during traveling at 60 km / h with the light 170 turned on, the light 170 Only when the microcomputer 110 is in the reset state and for about 300 to 400 μsec after returning from the reset, is not lit.

  If the microcomputer 110 is reset while the vehicle C is running at a speed slower than the predetermined speed V with the light 170 turned on or stopped, the memory 180 is stored in the memory 180 in step F immediately before the microcomputer 110 is reset. Since the information associated with the light extinction condition being met is stored, it is determined that the light lighting condition is met in step D when returning from reset after that, as in the case of starting the engine. After that, in step E, the light 170 is turned on.

  If the microcomputer 110 is reset while the car C is turning off the light 170, the light-off condition is satisfied in the memory 180 in Step F immediately before the resetting of the microcomputer 110 regardless of the traveling speed. The information associated with the light is stored, and when returning from reset thereafter, the light 170 is kept off.

  As described above, the present invention is useful for an automobile autolight system.

It is a figure showing composition of an autolight system of a car concerning an embodiment of the present invention. It is a figure which shows the flowchart of operation | movement of the autolight system of the motor vehicle which concerns on embodiment of this invention. It is a figure which shows the flowchart of step A. It is a figure which shows the flowchart of step B. It is a figure which shows the flowchart of step C. It is a figure which shows the flowchart of step D. It is a figure which shows the flowchart of step F. FIG. It is a figure which shows the time chart of the autolight system of the motor vehicle which concerns on embodiment of this invention. It is a figure showing composition of an autolight system of a car concerning an embodiment of the present invention. It is a figure which shows the time chart of operation | movement of the autolight system of the motor vehicle which concerns on embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Autolight system 110 Microcomputer 111 Ambient illuminance calculation processing device 112 Travel distance calculation processing device 113 Turning-off / lighting condition determination processing device 114 Output control device 115 Time measurement timer 120 Illuminance sensor 130 Vehicle speed sensor 140 Ignition switch 150 Power supply device 160 Reset circuit 170 Light 180 Memory C Car

Claims (3)

A microcomputer that is controlled to turn on the light by determining whether or not a predetermined light lighting condition is satisfied in the engine driving state, while being reset in the engine stopped state ;
A memory for storing light on / off state information,
When the microcomputer is reset in the engine driving state and is initialized by losing information for determining whether the lighting condition is satisfied, the memory stores and holds the lighting on / off state information of the light immediately before the reset, When the microcomputer subsequently returns from reset, it reads the light on / off state information from the memory, and based on that information, restores the light on / off state to the state before reset ,
The memory stores a point off state information of the light at that time in the case of running at a speed above a predetermined speed, it stores information associated with the light is off otherwise, the motor vehicle Auto light system. The auto light system according to claim 1,
The above-mentioned microcomputer is an autolight system for automobiles that determines whether or not the illuminance of light from outside the vehicle is lower than a predetermined illuminance as a light lighting condition. In the auto light system according to claim 2 ,
In the microcomputer, whether or not the traveling distance after the illuminance of light from outside the vehicle is lower than the predetermined illuminance is longer than the predetermined distance and / or the illuminance of light from the outside of the vehicle is lower than the predetermined illuminance. An auto light system for automobiles that determines whether or not the elapsed time has been longer than a predetermined time as a light lighting condition.

Images