JP2736242B2 - Inspection method of notification indicating operation state of vehicle equipment and device configured as vehicle data collection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle data collection device and a vehicle device which are connected to the same vehicle-mounted power supply in a vehicle, and wherein a report indicating an operation state of the vehicle device is recorded. The present invention relates to a method for checking a report indicating an operation state of a vehicle device to be recorded by a collection device, and a device configured as a vehicle data collection device.
In this case, means for recording a report indicating the operation state of the vehicle device is provided, and the device and the vehicle device to record the operation are connected to the same vehicle-mounted power supply in the vehicle. An important application of the present invention is a vehicle data collection device configured as an accident data memory.

[0002]

2. Description of the Related Art Vehicle data collection devices are known, which record the operation of, for example, a vehicle braking device, lighting engineering device, or optical and acoustic signal devices. Indeed, in this way, the switching event triggered by the operation of the corresponding operating member is detected, but no verification is made as to whether the desired function has been performed successfully.

In the case of a vehicle data collecting device configured as an accident data memory, such a situation cannot be accepted. This is because accident data memories, by their use, should contribute to legal stability by recording data in the exact situation of the accident.

Next, the background of the present invention will be clarified based on the following examples. A conventional vehicle data collection device can record that the driver has braked the operation of the vehicle. However, in the case of a rear-end collision, the driver of the following vehicle may deny that the brake lamp has been turned on. If a collision damages the brake lights of the vehicle ahead in such a way that its operational health can no longer be demonstrated, the damaged driver has difficulty in clearing the charges.

In such a situation, the driver of the damaged vehicle may not be able to see the brake lights so that the driver of the following vehicle can timely reduce the speed of the vehicle and thereby avoid a collision. We need a way to prove that we should have done it.

[0006]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to increase the information reliability or information providing capability of a message transferred to a vehicle data collection device by operating a recording vehicle device.

[0007]

SUMMARY OF THE INVENTION According to the present invention, an object of the present invention is to provide a vehicle data collection device, which detects and generates as a signal the occurrence and / or disappearance of a notification indicating the operation state of a vehicle device, The occurrence of voltage peaks and / or level changes in the on-board power supply is also detected and detected as a separate signal, and the information to be recorded can be obtained from a comparison between the occurrence times of the two signals detected and detected. The dependent claims show advantageous embodiments of the solution according to the invention. Claim 9 discloses a device configured as a vehicle data collection device, such as an accident data memory, which comprises means for performing the method according to the invention.

[0008] The solution according to the present invention not only eliminates the above-mentioned disadvantages of the conventional vehicle data collection device, but also
In addition, it has the following significant advantages. In other words, the solution according to the invention does not require additional units to be inserted into the vehicle electronics and does not complicate the hardware wiring. The solution according to the invention is therefore very low-cost. In particular, accident data memories which are very cost-sensitive cannot bear the cost of additional units and the wiring costs due to the insertion of hardware. The solution according to the invention can be realized by existing electronic devices in the vehicle data collection device. It can also be added to equipment already in use.

The solution according to the invention not only provides useful information for accident situations, but also in addition to monitoring the operating functions of the vehicle equipment connected to the vehicle data collection device in the daily operation of the vehicle. Can be realized. This is because when a malfunction of the vehicle device occurs, a corresponding trouble report can be easily sent to the driver.

Next, the means for solving the present invention will be described based on an embodiment with reference to the pulse diagram shown in FIG.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Here, it is assumed that the vehicle data collection device and the vehicle equipment--to record a message indicating the operation state of this equipment--are connected to the same current supply line, that is, the same vehicle-mounted power supply in the vehicle. It is connected. In this case, when the vehicle device is turned on or off by operating the operating member, this causes a voltage drop due to the internal resistance of the current supply device (generator / battery / regulator) in the vehicle's on-board power supply. However, at least, inductive or capacitively induced voltage peaks, ie positive or negative pulses, occur.

However, such pulses occur during normal driving operation of the vehicle, that is to say under current load, by stray and rather by accidental fault events. Thus, in order to distinguish these pulses from those which are actually information-reliable for the examination of messages which appear, for example, with the operation of the vehicle brakes or the lighting device and indicate their operation, they are detected in the on-board power supply. It is necessary to evaluate the correlation between the time of the pulse and the time of generation or disappearance of a signal for notifying the operation of the vehicle equipment to the vehicle data collection device.

As shown in FIG. 1, it is assumed that the vehicle device A is turned on at time t1 and turned off at time t2. Due to the switching process, a voltage peak and / or level change P which correlates with these switching times in the vehicle power supply
(T1) and P (t2) are evoked and they are captured and detected by the vehicle data collection device in the same way as the level changes A (t1) and A (t2). In the vehicle data collection device, the incoming voltage peaks and / or level changes P (t1) and P (t2) are preferably converted electronically into pulses PF (t1) and PF (t2). The detected side edges of the signal notifying the operation of the device A also include the pulses PA (t1) and PA for more reliable signal processing.
It is used for forming (t2).

The width of the correlation is determined by the length of the shaped signals PA and PF, that is, the period during which the signals PA and PF must occur simultaneously. The shorter the signal, the better the signal-to-noise ratio. This is because if the signal is too long, there is a high probability that an accidental fault pulse will overlap with a switching event triggered by operation of the vehicle equipment. On the other hand, since the input signal may be delayed due to the system, the length of the pulse signal cannot be arbitrarily short.

In order to be able to more reliably detect the correlation, the correlation information is maintained at least for the duration of the interval during which the signal applied to the input of the vehicle data acquisition device is scanned by the electronic device of the vehicle data acquisition device. Need to be done. For example, the occurrence of the correlation between the signals PA and PF can be detected by the temporary storage of these signals PA and PF, or by the temporary storage of one signal obtained by combining both the signals PA and PF. For the sake of clarity, FIG. 1 does not show a time interval corresponding to the scanning frequency.

In the vehicle data collection device, the signals PA and PF are compared with each other with respect to the time of their occurrence. This is preferably done by AND logic combination. The comparison evaluation result is shown by the signal SA.

In the case of the example given here, the voltage peak P detected by the on-board power supply of the vehicle appears almost simultaneously with the signal PA indicating the operating state of the device A,
What can be distinguished from this is that not only the operating member belonging to the vehicle device A has been operated, but also the device has entered the operating state due to the current induced by the detected electric pulse.

In the second example, a somewhat different situation is shown. The device B is operated at the times t4 and t6, but in this case, the currents flowing simultaneously in time are not detected. The accidental disturbance pulses P shown at times t3 and t6 are not taken into account as a response to the operation of device B due to their time intervals for switching events B (t4) and B (t6). AN of signals PB and PF
The D-coupling has a negative result, ie no recordable pulse SB is generated in this case. Apparatus B-for example the coil filament of the lamp-must be clearly defective. In this case, the driver should be given a trouble report that specifies the position of the trouble very accurately.

However, the above-described inspection of the message indicating the operation state of the vehicle device does not provide information on how many loads are simultaneously operated. If it is additionally intended to detect whether a plurality of loads connected in parallel have been operated simultaneously, it is also desirable to evaluate the magnitude of the voltage peaks and / or level changes occurring in the vehicle power supply. This is because the magnitude of the pulse is approximately proportional to the current intensity, ie the power consumption of the applied current load.
The proportionality constant depends on the specific conditions in the vehicle.
The proportional constant can be obtained by comparing signals of various operated vehicle devices. In this way, it is possible to detect whether one device or a plurality of devices are operated at the same time.

Each device, if operated and functioning properly, can generate a signal specific to the device and store the characteristic identification value of the signal in the vehicle data collection device. If the characteristic identification value of the signal detected during the operation of this device is different from the stored characteristic identification value, it indicates that a failure has occurred in the input device. In this case, a trouble report can be sent to the driver.

In summary, the above-described method makes it possible to simply and qualitatively and quantitatively check the messages which are presented to the vehicle data collection device for the purpose of recording and indicating the operating state of the vehicle equipment, at a significantly lower cost. A solution is obtained, which increases the information reliability of those messages.

FIG. 2 schematically shows an embodiment relating to the basic means of the present invention in the vehicle data collecting apparatus according to the present invention. The vehicle data collection device 7 is connected to the operation member of the vehicle device via the input side 1, and the operation of the operation member is to be recorded in the vehicle data collection device 7. By operating the operating member, a notification is issued in the form of a signal that can be captured and detected electrically. This signal is converted into a rectangular pulse in the pulse shaper 3 and
Transferred to Via the input 2, a current is supplied to the vehicle data collection device 7. By means 4, voltage peaks occurring on the feeder line and / or level changes due to the turning on or off of the current load are detected and their signals are converted into rectangular pulses which are also supplied to the coupling element 5. Here, it is assumed that the vehicle data collection device 7
Load-the operation of this load is recorded and this load sends a signal to the vehicle data collection device 7 via the input 1-
Is connected to the same vehicle-mounted power supply of the vehicle via those power supply lines. The coupling element 5 comprises means 3 and 4
Are compared at the time of occurrence of both input signals coming from. If both input signals occur at approximately the same time, information is recorded in memory 6 that an actuation command has been given and has also been executed. In this way, the notification sent to the vehicle data collection device 7 by the operation of the vehicle equipment is inspected,
This notification is significantly improved with respect to its information reliability or information provision ability. This is because the current flow in the applied load, which represents the detected voltage peaks and / or level changes, is highly likely to indicate its proper operation.

[Brief description of the drawings]

FIG. 1 is a pulse diagram for explaining an embodiment according to the present invention.

FIG. 2 is a diagram showing an embodiment of a vehicle data collection device according to the present invention.

[Explanation of symbols]

 Reference Signs List 3 pulse shaper 4 means for detecting voltage peak and / or level change 5 coupling element 6 memory 7 vehicle data collection device

Claims (10)

(57) [Claims] 1. A vehicle data collection device and a vehicle device are connected to the same vehicle-mounted power supply in a vehicle, and a report indicating an operation state of the vehicle device is recorded, and should be recorded by the vehicle data collection device. In a method for inspecting a report indicating an operation state of a vehicle device, a vehicle data collection device detects and generates, as a signal, occurrence and / or disappearance of a report indicating an operation state of a vehicle device, and detects a voltage at a vehicle-mounted power supply. The occurrence of a peak and / or a level change is also captured and detected as a separate signal, and information to be recorded is obtained from a comparison between the times of occurrence of both the captured and detected signals. An inspection method for a report indicating an operation state of a vehicle device to be recorded. 2. a) a voltage peak and / or voltage peak occurring at the vehicle's onboard power supply and detected by the vehicle data collection device;
Or the level change is converted to a rectangular pulse for a more reliable signal evaluation, the input signal delay due to the system is compensated and the accidental disturbance pulse overlaps with the switching event triggered by the operation of the vehicle equipment The duration of the rectangular pulse is selected such that the probability is minimized; b) the occurrence of temporally overlapping rectangular pulses is checked to obtain correlation information, the test result being at least the vehicle data collection device 2. The method according to claim 1, wherein the signal applied to the input of the device is held until the next time it is scanned. 3. The voltage peaks and / or level changes occurring in the vehicle's on-board power supply and detected by the vehicle data collection device are evaluated with respect to their magnitudes in order to estimate the number of loads applied. 3. The method according to 1 or 2. 4. A fault notification is generated by the vehicle data collection device if a pulse generated by a voltage peak cannot be detected almost simultaneously at the time of generation of the notification indicating the operation state of the vehicle equipment. The method of claim 1. 5. The method according to claim 4, wherein the fault notification is recorded by a vehicle data collection device. 6. A characteristic identification value of a signal detected during operation of the device is stored in the vehicle data collection device, and the characteristic identification value of the signal is stored in a subsequent evaluation of a message sent from the device during the operation. The method according to claim 1, wherein a fault report is recorded if a deviation from the set characteristic identification value is detected. 7. The method according to claim 4, 5 or 6, wherein the fault notification is sent to a driver of the vehicle. 8. The method according to claim 4, wherein the failure notification includes details about a type of the failure, such as a name of a faulty device and a location of the failure. 9. An apparatus configured as a vehicle data collection apparatus, comprising means for recording a message indicating an operation state of a vehicle device, wherein the device and the vehicle device to record the operation are in a vehicle. In a device configured as a vehicle data collection device of a type connected to the same vehicle-mounted power supply, a time point at which a report generated by operation of vehicle equipment is generated, and a voltage peak and / or a voltage peak detected at a vehicle power supply of the vehicle at substantially the same time Alternatively, means for detecting whether or not the operation command issued by the operation is executed by comparing with a level change is provided, and the comparison result is stored by the means. A device configured as a device. 10. The apparatus according to claim 9, further comprising means for generating a fault notification to a driver of the vehicle when a negative comparison result occurs.