JPH08128926A - Method for inspecting report for indicating operating state of vehicle equipment and device constituted as vehicle-data collecting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain information to be recorded at low costs by capturing and detecting the production/deletion of a message indicating the operation state of a vehicle and the occurrence of changes in the voltage peak and level of an on-vehicle power source as signals and comparing both signals for generation time. SOLUTION: An electric signal is inputted from the operation member of a vehicle via an input 1, changed to be a rectangular pulse by a pulse forming device 3 and inputted to a connecting element 5. A voltage peak generated on a power supply line and a level change caused by turning ON/OFF of a current load are detected by an input 2 and a detecting means 4, these are changed to be rectangular pulses and then inputted to the element 5. The element 5 compares generation time between a signal produced by the pulse forming device 3 and a signal produced by the means 4 and, if these signals are simultaneously generated ones, information indicating issuance and execution of an operation command is stored in a memory 6. Thus, by inspecting information with the operation of the vehicle, the reliability of the information and information providing performance are greatly improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle data collecting device and a vehicle device, which are connected to the same vehicle-mounted power source in a vehicle, so that a message indicating an operation state of the vehicle device is recorded. The present invention relates to a method for inspecting a notification indicating an operation state of a vehicle device to be recorded by a collecting device, and a device configured as a vehicle data collecting device.
In this case, means is provided for recording a notification indicating the operating state of the vehicle equipment, and the device and the vehicle equipment for which the operation is to be recorded are connected to the same vehicle-mounted power source in the vehicle. An important application of the present invention is a vehicle data collection device configured as an accident data memory.

[0002]

BACKGROUND OF THE INVENTION Vehicle data collection devices are known, which record the operation of, for example, vehicle braking systems, lighting engineering systems, or optical and acoustic signaling systems. In this way, the switching event triggered by the operation of the corresponding operating member is certainly detected, but no verification is made as to whether or not the desired function has been performed normally.

In the case of a vehicle data collecting device configured as an accident data memory, such a situation cannot be accepted. The reason is that the accident data memory should contribute to legal stability by recording the data in the accident situation, just for its use.

The background of the invention will now be clarified on the basis of the following examples. A conventional vehicle data collection device can record that the driver has performed operational braking 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 vehicle's brake lights in front of the vehicle are damaged by a collision beyond the normal operating function of the vehicle, it will be difficult for a damaged driver to argue.

In such a situation, the driver of the damaged vehicle may actually see the brake lights in order for the driver of the following vehicle to slow down 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 Therefore, an object of the present invention is to enhance the information reliability or the information providing ability of a message transmitted to a vehicle data collecting device by operating a recording vehicle device.

[0007]

According to the present invention, this problem is solved by a vehicle data collecting device that detects the occurrence and / or disappearance of a message indicating the operating state of vehicle equipment as a signal and detects the occurrence of the signal. The occurrence of voltage peaks and / or level changes in the on-vehicle power supply is also captured and detected as a separate signal, and the information to be recorded is obtained from a comparison of the times of occurrence of both of the detected and detected signals, which is solved. 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-for example an accident data memory, which device comprises means for carrying out the method according to the invention.

The solution according to the invention not only eliminates the previously mentioned drawbacks of conventional vehicle data collection devices,
In addition to that, it has the following significant advantages. In other words, the solution according to the invention does not require additional units to be inserted in the vehicle electronics, and the solution does not complicate the wiring of the hardware. The solution according to the invention is therefore significantly less expensive. In particular, an accident data memory, which is 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 present invention can be realized by an existing electronic device in the vehicle data collection device. It can also be added to equipment that is already in use.

The solution according to the invention not only provides useful information for an accident situation, but additionally also monitors the operational function of the vehicle equipment connected to the vehicle data collecting device in the daily operation of the vehicle. Can be realized. This is because if a malfunction of the vehicle equipment occurs, a corresponding fault notification can be easily sent to the driver.

Next, the solution means of 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 The premise here is that the vehicle data collection device and the vehicle equipment-recording a notification indicating the operating state of this equipment-are connected to the same current-fed line, i.e. to the same on-board power supply in the vehicle. That 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-mounted power supply of the vehicle. But at least there are inductively or capacitively induced voltage peaks or positive or negative pulses.

Pulses of this kind, however, occur even during the normal driving operation of the vehicle, ie when the current load is switched on, due to strays and rather to accidental fault events. Therefore, in order to distinguish these pulses from those which are information-reliable for the examination of the messages which actually appear, for example, with the operation of the brakes of the vehicle or with the operation of the illuminating device and which represent its operating condition, they are detected in the onboard power supply. It is necessary to evaluate the correlation between the time of the pulse and the time of generation or disappearance of the signal for notifying the vehicle data collection device of the operation of the vehicle equipment.

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

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

In order to be able to detect the correlation more reliably, the correlation information remains at least for the duration of the interval in which the signal applied to the input side of the vehicle data acquisition device is scanned by the electronic device of the vehicle data acquisition device. Need to let. For example, the occurrence of a 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 the combination of both signals PA and PF. For the sake of clarity, the time intervals corresponding to the scanning frequency are not shown in FIG.

In the vehicle data acquisition system, the signals PA and PF are compared with each other as to when they occurred. This is preferably done by AND logic combination. The comparative evaluation result is shown by the signal SA.

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

The second example illustrates a somewhat different situation. Device B was operated at times t4 and t6, but in this case no temporally simultaneous currents are detected. Due to their time intervals for the switching events B (t4) and B (t6), the accidental fault pulses P shown at the times t3 and t6 are not considered as a response corresponding to the operation of the device B. AN of signals PB and PF
The D-coupling has a negative consequence, i.e. no recordable pulse SB is produced in this case. The device B-for example the coil filament of the lamp-should be clearly defective. In this case, the driver should be given a fault notification that locates the fault location very accurately.

However, the above-mentioned inspection of the notification indicating the operating state of the vehicle equipment does not provide information on how many loads were operated at the same time. If it is desired to additionally detect whether or not a plurality of loads connected in parallel are simultaneously operated, it is desirable to evaluate the strength of the voltage peak and / or level change occurring in the on-vehicle power supply. This is because the magnitude of the pulse is approximately proportional to the current strength, that is, the power consumption of the applied current load.
The constant of proportionality depends on the specific conditions of the vehicle.
This proportional constant can then be determined by comparing the signals of the various operated vehicle devices. By doing so, it is possible to detect whether one device or a plurality of devices are simultaneously operated.

Each piece of equipment, if it is operated and is functioning properly, can generate a signal specific to this piece of equipment and store the characteristic identification value of the signal in the vehicle data acquisition 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 inserted device. In this case, a fault notification can be sent to the driver.

In summary, the method described above makes it possible to easily and qualitatively and quantitatively implement a qualitative and / or quantitative examination of the notifications, which represent the operating conditions of the vehicle equipment and are supplied to the vehicle data collecting device for recording. A solution is obtained, which increases the information reliability of those reports.

FIG. 2 schematically shows an embodiment of the basic means of the present invention in the vehicle data collecting device according to the present invention. The vehicle data collecting device 7 is connected to the operating member of the vehicle device via the input side 1, and the operation of the operating member is to be recorded in the vehicle data collecting device 7. By operating the operation 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 the coupling element 5
Transferred to A current is supplied to the vehicle data collecting device 7 via the input side 2. The means 4 detect the voltage peaks occurring on the supply line and / or the level changes due to the turning on or off of the current load and convert their signals into rectangular pulses, which are also fed to the coupling element 5. The assumption here is that the vehicle data collection device 7 is
Load-the operation of this load is recorded and this load sends a signal via the input side 1 to the vehicle data collection device 7-
Means that they are connected to the same vehicle-mounted power source of the vehicle via those power supply lines. The coupling element 5 comprises means 3 and 4
Compare the time of occurrence of both input signals coming from. If both input signals occur at approximately the same time, the information that the activation command has been given and that it has been executed is recorded in the memory 6. In this way, the notification sent to the vehicle data collection device 7 by the operation of the vehicle equipment is inspected,
This notification will be significantly improved in terms of its information reliability or ability to provide information. This is because the current flow in the applied load, which represents the detected voltage peaks and / or level changes, has a high probability of indicating its proper operation.

[Brief description of 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]

 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)

[Claims] 1. A vehicle data collecting device and a vehicle device are connected to the same vehicle-mounted power source in a vehicle, and a notification indicating an operating state of the vehicle device is recorded so that it should be recorded by the vehicle data collecting device. In a method of inspecting a notification indicating an operation state of a vehicle device, the vehicle data collection device captures and detects, as a signal, occurrence and / or disappearance of a notification indicating an operation state of the vehicle device, and detects a voltage at an in-vehicle power supply of the vehicle. The occurrence of peaks and / or level changes is also captured and detected as a separate signal and the information to be recorded is obtained from a comparison of the times of occurrence of both of the detected and detected signals. Inspection method for notifications that indicate the operating status of vehicle equipment to be recorded. 2. A) voltage peak and / or / and a voltage peak generated in an on-vehicle power supply of a vehicle and detected and captured by a vehicle data collection device
Or the level change is converted into a rectangular pulse for a more reliable signal evaluation, the system-induced delay of the input signal is compensated and the accidental disturbing pulse overlaps with the switching event triggered by the operation of the vehicle equipment. The duration of the rectangular pulse is selected so that the probability is minimized, and b) the generation of rectangular pulses that overlap in time is inspected to obtain correlation information, the inspection result being at least the vehicle data acquisition device. 2. The method of claim 1, wherein the signal applied to the input side of the device is held until the next time it is scanned. 3. The voltage peaks and / or level changes detected in the on-vehicle power supply of the vehicle and detected by the vehicle data acquisition device in order to estimate the number of applied loads are evaluated in terms of their intensity. The method according to 1 or 2. 4. The vehicle data collection device issues a fault notification if the pulse generated by the voltage peak cannot be detected almost simultaneously at the time of the generation of the report indicating the operating state of the vehicle equipment. The method according to item 1. 5. The method of claim 4, wherein the fault notification is recorded by a vehicle data collection device. 6. A characteristic identification value of a signal detected when operating a device is stored in the vehicle data collection device and stored with the signal characteristic identification value in a subsequent evaluation of a message sent from the device at the time of its operation. 6. The method according to claim 1, wherein a fault message is recorded if a deviation from the identified characteristic identification value is detected. 7. The method according to claim 4, 5 or 6, wherein the fault notification is sent to the driver of the vehicle. 8. The method of claim 4, 5, 6, or 7, wherein the fault notification includes detailed points for a fault type such as a name of a faulty device and a fault location. 9. A device configured as a vehicle data collection device, comprising means for recording a message indicating an operation state of the vehicle device, and the device and the vehicle device for which the operation is to be recorded are in a vehicle. In a device configured as a vehicle data collection device that is connected to the same in-vehicle power supply, the time at which a notification occurred due to the operation of vehicle equipment and the voltage peak and / or Alternatively, means for detecting whether or not the operation command issued by the operation is executed by comparison with the level change is provided, and the comparison result is stored by the means, vehicle data collection A device configured as a device. 10. The device according to claim 9, further comprising means for issuing a fault notification to the driver of the vehicle when a negative comparison result occurs.