JP5381022B2 - Vehicle control device - Google Patents

Description

  The present invention relates to a vehicle control device that is mainly mounted on an automobile and is used for lighting control and extinguishing control of a room lamp and a hazard lamp.

  In recent years, a vehicle control device that integrates a control device that controls a room lamp, a hazard lamp, etc. of a vehicle and a control device such as a so-called keyless entry system that locks and unlocks the vehicle wirelessly has been incorporated into a vehicle. ing.

  Such a conventional vehicle control apparatus will be described with reference to FIG.

  FIG. 6 is a block circuit diagram of a conventional vehicle control apparatus. In FIG. 6, 1 is a control means composed of a semiconductor element such as a microcomputer, and 2 and 3 are switching means composed of a semiconductor element such as a transistor. The switching means 2 and 3 are connected to the control means 1.

  Reference numeral 4 denotes a receiving circuit composed of a semiconductor element such as an integrated circuit, a fixed resistor, and an electronic component such as a multilayer capacitor. Reference numeral 5 denotes an antenna composed of a conductive wire such as a copper wire. The antenna 5 passes through the receiving circuit 4. Are connected to the control means 1.

  These control means 1, switching means 2, 3 and receiving circuit 4 and antenna 5 are mounted on a wiring board (not shown) having a plurality of wiring patterns formed on the upper and lower surfaces thereof by soldering or the like. The vehicle control device 10 is composed of the control means 1, the switching means 2 and 3, the receiving circuit 4 and the antenna 5.

  And such a vehicle control apparatus 10 is attached to the predetermined location of a motor vehicle, for example, the courtesy switch which detects opening / closing of the door shown by 11, or on the instrument panel of the vehicle shown by 12, etc. It is connected to a hazard switch provided at a reachable position and an opening / closing device that performs motor control to open and close the door lock indicated by 15.

  Further, the vehicle control device 10 is connected to a lamp for illuminating the inside of the vehicle indicated by 13, a hazard lamp indicated by 14, and in the engine room in front of the vehicle indicated by 16 via the lamp 13 and the hazard lamp 14. Connected to the battery.

  In the above configuration, when the driver approaches the vehicle, operates a button of a portable device (not shown), and transmits a signal formed from a predetermined identification code or the like, the signal transmitted from the portable device is transmitted to the antenna 5. The received signal is amplified by the receiving circuit 4 and then input to the control means 1 as a signal S21.

  Then, the control means 1 checks whether or not the predetermined identification code included in the signal S21 is a regular signal, and if it is determined that the signal is a regular signal, the control means 1 causes the opening / closing device 15 to unlock the door. A command signal S22 is output to unlock the door of the vehicle.

  Further, when the driver opens the door to board the vehicle, a signal S1 notifying that the door has been opened is input to the control means 1 from the courtesy switch 11 provided on the door side of the driver's seat.

  And the control means 1 changes the signal S2 sent to the switching means 2, and makes the lamp | ramp 13 light.

  Further, when the hazard switch 12 is pressed when the driver arrives at the destination or the like, the signal S11 from the hazard switch 12 is input to the control means 1, and at this time, the control means 1 outputs the signal S12 at a predetermined interval. It is possible to change the output from “0” to “1” and from “1” to “0” for output, and to blink the hazard lamp 14.

  That is, the control means 1 changes the signal S2 sent to the switching means 2 based on only the signal S1 input from the courtesy switch 11, and turns on the lamp 13.

As prior art document information related to the invention of this application, for example, Patent Document 1 is known.
JP 2004-131023 A

  However, in the above-described conventional vehicle control device, the driver needs to replace the lamp 13 when the lamp 13 is turned off. However, since the replacement time varies depending on the type of the lamp 13, the driver has a degree of illuminance of the lamp. If it changed, there was a problem of not knowing whether to prepare a lamp for replacement.

  The present invention solves such a conventional problem, and an object of the present invention is to provide a vehicle control device capable of detecting an abnormality of the lamp 13 at an early stage and notifying the driver.

  In order to achieve the above object, the present invention has the following configuration.

The invention according to claim 1 of the present invention is a vehicle comprising control means for controlling lighting and extinguishing of lamps of a vehicle, and switching means for switching between lighting and extinguishing of the lamps by a control signal from the control means. The control device is provided with detection means for detecting the current flowing through the lamp, and the detection means has an upper threshold value and a lower threshold value, and the current is equal to or lower than the upper threshold value and equal to or higher than the lower threshold value. A normal detection signal is output to the control means, and when the current exceeds the upper threshold value or lower than the lower threshold value, an abnormality detection signal is output to the control means, When the detection signal continues for a first predetermined time or more, the control means determines that the lamp is abnormal, and when the current fluctuates across the upper threshold or the lower threshold, the control Means up Counting the number of occurrences of changes to the normal detection signal from the abnormality detection signal, when the occurrence count becomes equal to or greater than the predetermined value is intended to determine the abnormality of the lamp, thereby detecting means the current through the lamp Since the control means determines that the lamp is abnormal based on the detection signal from the detection means, it is possible to provide a vehicle control device that can detect the abnormality of the lamp 13 at an early stage. Have.

  As described above, according to the present invention, there is an advantageous effect that it is possible to obtain a vehicle control device capable of detecting a lamp abnormality at an early stage and notifying the driver.

  Embodiments of the present invention will be described below with reference to FIGS.

  In addition, the same code | symbol is attached | subjected to the part of the structure same as the structure demonstrated in the term of background art, and detailed description is simplified.

(Embodiment)
FIG. 1 is a block circuit diagram of a vehicle control apparatus according to an embodiment of the present invention. In FIG. 1, reference numeral 21 denotes control means composed of a semiconductor element such as a microcomputer.

  Reference numeral 22 denotes a detection means composed of a semiconductor element such as an integrated circuit, and is connected to the control means 21 by two connection terminals 22a and 22b. The connection terminal 22a and the connection terminal 22c are electrically connected inside the detection means 22. Connected.

  Further, the connection terminal 22d of the detection means 22 is connected to the battery 16 outside the vehicle control device, and is electrically connected inside the connection terminal 22e and the detection means 22. The connection terminal 22e is a lamp external to the vehicle control device. 13 is connected.

  Reference numerals 2 and 3 denote switching means composed of semiconductor elements such as transistors. The switching means 2 is connected to the connection terminal 22 c of the detection means 22, and the switching means 3 is connected to the control means 21.

  Reference numeral 4 denotes a receiving circuit composed of a semiconductor element such as an integrated circuit, an electronic component such as a fixed resistor, a multilayer capacitor, etc., connected to the control means 21, and an antenna composed of a conductive wire such as a copper wire indicated by 5. It is connected.

  The control means 21, switching means 2, 3, detection means 22, receiving circuit 4 and antenna 5 are soldered to a wiring board (not shown) having a plurality of wiring patterns formed on the upper and lower surfaces. The vehicle control device 30 is configured.

  Such a vehicle control device 30 is attached to a predetermined portion of the automobile, and as described in the prior art, a courtesy switch that is provided on a door frame beside the driver's seat indicated by 11 and detects the opening and closing of the door. Or a hazard switch for blinking a hazard located at the front of the driver on the top of the instrument panel of the vehicle as shown by 12 and a motor control for opening and closing the door lock as shown by 15. It is electrically connected to the opening / closing device to be performed via a connector, a lead wire (not shown) or the like.

  One end of the hazard lamp indicated by 14 is connected to the switching means 3 of the vehicle control device 30, and the other end is connected to a battery disposed in the engine room in front of the vehicle indicated by 16.

  Further, a lamp such as a loop lamp indicated by 13 has one end connected to the switching means 2 of the vehicle control device 30 and the other end connected to the connection terminal 22e of the detection means 22.

  Reference numeral 31 denotes a display device provided on the instrument panel in front of the driver, such as a display of the vehicle speed, a shift lever position such as P, R, L, or a pattern indicating the attachment / detachment state of the seat belt. The vehicle information is displayed, and a lamp replacement display such as illuminating a lamp pattern to notify the driver whether or not the lamp 13 needs to be replaced is further performed. A connector or a lead wire (not shown) ) Etc., and electrically connected to the control means 21.

  In the above configuration, when a driver approaches a vehicle and operates a button of a portable device (not shown) to transmit a radio wave, a signal composed of an identification code transmitted from the portable device is received by the antenna 5. After that, the received signal is amplified by the receiving circuit 4 and input to the control means 21 as the signal S21.

  Then, the control means 21 checks whether the identification code or the like included in the signal S21 is a regular signal. If the control means 21 determines that the identification signal is a regular signal, the control means 21 outputs a signal S22 that instructs the opening / closing device 15 to unlock the door. Output and unlock the door of the vehicle.

  Next, lighting control of the lamp 13 when the driver opens the door to board the vehicle will be described with reference to the time chart of FIG. 2, in which FIG. 2A to FIG. ) Correspond to the signals S101 to S104 in FIG.

  Here, the signal S101 is a signal that outputs “1” when the courtesy switch 11 is “ON” and outputs “0” when the courtesy switch 11 is “OFF”.

  The current S102 is a current flowing through the lamp 13 and is detected by the detection means 22.

  The signal S103 is a detection signal from the detection means 22 input to the control means 21, and the current S102 in FIG. 2B is 1.1 A when the battery 16 is a battery having a reference voltage of 12 V, for example. If the threshold value TH indicated by the dotted line is set higher than the threshold value TH or set to 0.9A, for example, is also lower than the threshold value TL indicated by the dotted line, “1” is output, and the current S102 is equal to or greater than the threshold value TL In some cases, “0” is output.

That is, as the signal S103, “ 0 ” is output if the current S102 flowing through the lamp 13 is normal, and “ 1 ” is output if the current S102 flowing through the lamp 13 is abnormal.

  Further, the signal S104 is “1” when the control means 21 turns on the lamp 13 and “0” when the lamp 13 is turned off.

  Next, the actual lighting operation shown in the time chart of FIG. 2 will be described. First, in FIG. 2A, for example, a driver who wants to board the vehicle opens the door of the vehicle and operates When the courtesy switch 11 provided on the door side of the seat is “ON”, “1” is input to the control means 1 as a signal S101.

  Therefore, as shown in FIG. 2D, the control means 21 outputs “1” as the signal S104, the lamp 13 is lit, and the current S102 flowing through the lamp 13 is detected as shown in FIG. 2B. Is detected.

  Here, the current S102 detected by the detection unit 22 shown in FIG. 2B is equal to or higher than the threshold TL while the signal S101 shown in FIG. 2A is “1”. Since it is below, the detection means 22 outputs "0" as detection signal S103 of FIG.2 (c).

  Since this detection signal S103 is maintained at “0”, as shown in FIG. 2A, the control means 21 continuously outputs “1” as the signal S101 and continues the lamp 13. Light.

  Further, when the driver presses the hazard switch 12 to park when arriving at the destination, the signal S11 is input from the hazard switch 12 to the control means 21, and the control means 21 intermittently outputs the signal S12 at predetermined intervals. Is changed from “0” to “1” and from “1” to “0”, and the hazard lamp 14 can be blinked at predetermined intervals.

  Here, in the above description, FIG. 2 is used to explain the case where the lamp 13 is normally lit. Next, the first to third cases where the lamp 13 is not normally lit are illustrated. It demonstrates using FIGS. 3-5.

  The timing charts shown in FIGS. 3 to 5 are also timing charts of input / output signals of the control means 21 and the detection means 22, and the signals (a) to (d) in each figure are the same as those shown in FIG. Signals S101 to S104 corresponding to a) to (d).

  First, as a first case where the control means 21 determines that the lamp 13 is abnormal, a case where a non-regular lamp is attached as the lamp 13 will be described with reference to the timing chart of FIG.

  First, in FIG. 3A, for example, when the courtesy switch 11 is “ON”, “1” is input to the control means 21 as a signal S101, and as shown in FIG. Since “1” is output as S104, the lamp 13 is turned on, and the current S102 flowing through the lamp 13 is detected by the detection means 22 as shown in FIG.

  Then, as shown in FIG. 3B, for example, when the lamp 13 is not a regular part, the current detected by the detection means 22 is, for example, equal to or greater than the threshold value TH, so that the detection means 22 determines that the lamp 13 is abnormal. Then, as shown in FIG. 3C, “1” is output as the detection signal S103.

  When the detection signal S103 remains “1” and continues for a predetermined time T1 or more, for example, 50 msec or more, the control means 21 changes the signal S104 from “1” as shown in FIG. It is changed to “0” and the lamp 13 is turned off, thereby prompting the driver to replace the lamp 13.

  Alternatively, when the control means 21 determines that the lamp 13 is abnormal, it outputs a signal S105 for illuminating the lamp replacement display shown in FIG. Thus, the driver may be made aware that an abnormality has occurred in the lamp 13 and urge the driver to prepare for the replacement of the lamp 13.

Next, as a second case in which the control means 21 determines that the lamp 13 is abnormal, a so-called flicker occurs when the illuminance of the lamp 13 changes in a short time even if the detection signal S103 does not continue for a predetermined time. Will be described with reference to the timing chart of FIG.

  First, as shown in FIG. 4A, for example, when “1” is input from the courtesy switch 11 to the control means 1 as the signal S101, the signal from the control means 21 as shown in FIG. 4D. Since “1” is output as S104, the lamp 13 is turned on in the same manner as described above.

As shown in FIG. 4B, when flickering occurs, the current detected by the detection means 22 fluctuates up and down in a short time, for example, straddling the lower threshold TL. If it fluctuates, “1” is output when the detection signal S103 is less than the threshold TL as shown in FIG. 4C, and “0” is output when the detection signal is greater than or equal to the threshold TL.

Here, as shown in FIG. 4C, for example, when the detection signal S103 changes from “0” to “1”, the control unit 21 sets a flicker detection counter C1 for counting the number of occurrences of flicker. When the flicker detection counter C1 is incremented by 1 and reaches a predetermined value N1 or more, for example, 10 or more, it is determined that the lamp 13 is abnormal.

  When it is determined that the lamp 13 is abnormal, as shown in FIG. 4D, the lamp 13 is turned off and the driver is prompted to replace the lamp 13, and the display device 31 displays the lamp pattern. In the same manner as described above, the lamp replacement display is displayed to prompt the user to prepare for replacement.

  Finally, as a third case in which the control means 21 determines that the lamp 13 is abnormal, the lamp 13 deteriorates with time, and the current S102 has a lower threshold TL in a relatively longer time period than the second case. Will be described with reference to the timing chart of FIG.

  First, in FIG. 5A, for example, when “1” is input from the courtesy switch 11 as a signal S101 to the control means 1, as shown in FIG. Since “1” is output, the lamp 13 is turned on in the same manner as described above.

  Here, as shown in FIG. 5B, when the lamp 13 has deteriorated with time, the current becomes a value near the lower limit of the threshold TL as the deterioration progresses. In this case, the current is longer than the above flicker. There is a phenomenon in which the current slightly fluctuates up and down across the lower limit of the threshold TL at intervals.

  At this time, as shown in FIG. 5C, “1” is input to the control unit 21 as the detection signal S103 when it is less than the threshold value TL and “0” when it is equal to or more than the threshold value TL.

  Here, the vertical fluctuation across the threshold value TL is performed in a time period longer than the flickering, and the control means 21 has a predetermined time T2 interval, for example, an interval of 2 seconds, within the previous 2 seconds from that point. It is determined whether the detection signal S103 has changed from “0” to “1” even once. If it has occurred, 1 is added to the deterioration detection counter C2 for detecting the deterioration of the lamp 13.

  Then, as shown in FIG. 5C, if the deterioration detection counter C2 is equal to or greater than a predetermined value N2, for example, 10 or greater, the control means 1 determines that the lamp 13 is abnormal.

  When it is determined that the lamp 13 is abnormal, as shown in FIG. 5 (d), the lamp 13 is turned off and the driver is prompted to replace the lamp 13. It is the same as the case described above to illuminate and display and prompt preparation for replacement.

  Further, when the above-described control means 21 determines whether or not to increase the deterioration detection counter for detecting the deterioration of the lamp 13 at a predetermined time T2 interval, for example, at an interval of 2 seconds, the predetermined time T2 before that time is determined. If the detection signal S103 does not change from “0” to “1” even once, the flicker detection counter C1 and the deterioration detection counter C2 may be reset to “0”.

  By doing so, even when a very short period of noise is mixed into the detection signal S103 due to a spark phenomenon in the engine during operation and the flicker detection counter C1 or the deterioration detection counter C2 is mistakenly added, If there is no short-cycle noise due to a spark phenomenon or the like during the predetermined time T2, the flicker detection counter C1 and the deterioration detection counter C2 are reset to “0”, so that the lamp 13 is erroneously determined to be abnormal. Can be prevented.

  Further, in the above description, the detection means 22 has been described as detecting the current flowing through the lamp 13, but the present invention is not limited to this, and is configured as detecting the current flowing through the hazard lamp 14 or the like. However, the present invention can be implemented even if the control means 21 is configured to detect an abnormality of the hazard lamp 14.

  Thus, according to the present embodiment, since the detection means 22 is provided in the vehicle control device, the control means 21 can determine whether or not the lamp 13 is normal based on the abnormality determination signal from the detection means 22. In addition to turning off the lamp 13 and displaying it on the display means, a vehicle control device capable of prompting the driver to replace the lamp can be obtained.

  The vehicle control device according to the present invention is capable of obtaining an abnormality of a lamp at an early stage, and is useful as a device that mainly performs control of a vehicle lamp and locking / unlocking control with the same device.

1 is a block circuit diagram of a vehicle control device according to an embodiment of the present invention. Time chart of input / output signals of control means and detection means Same time chart Same time chart Same time chart Block diagram of a conventional vehicle control device

Explanation of symbols

2, 3 switching means 4 receiving circuit 5 antenna 11 courtesy switch 12 hazard switch 13 lamp 14 hazard lamp 15 switchgear 16 battery 21 control means 22 detection means 22a, 22b, 22c, 22d, 22e connection terminal 30 vehicle control device 31 display device

Claims (2)

A control means for controlling lighting and extinguishing of the lamp of the vehicle and a switching means for switching the lighting and extinguishing of the lamp by a control signal from the control means are provided, and a detection means for detecting the current flowing through the lamp is provided. The detection means includes an upper threshold value and a lower threshold value, and outputs a normal detection signal to the control means when the current is lower than the upper threshold value and higher than the lower threshold value. An abnormality detection signal is output to the control means when the upper threshold value is exceeded or lower than the lower threshold value, and when the abnormality detection signal continues for a first predetermined time or more, the control means When the lamp determines that the lamp is abnormal and the current fluctuates across the upper threshold value or the lower threshold value, the control means changes the detection signal from the normal detection signal to the abnormal detection signal. Counting the raw number, the number of occurrences is equal to or greater than a predetermined value when the abnormality determining vehicle control device the lamp. When the current fluctuates across the upper threshold or the lower threshold, the control means detects the abnormality from the normal detection signal from the detection means within a second predetermined time interval. 2. The vehicle control device according to claim 1, wherein if there is a change in the signal, this is counted as the number of occurrences, and the lamp is determined to be abnormal when the number of occurrences exceeds a predetermined value.

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