JPH07182548A - Accident generating situation recorder for automobile - Google Patents

Abstract

PURPOSE:To exactly analyze the state of the occurrence of an automobile accident while efficiently using a semiconductor memory by incorporating the semiconductor memory means in a housing and providing a lock means for preventing the semiconductor memory means from being ejected when the accident occurs. CONSTITUTION:The driving state of an automobile at normal time is time sequentially stored in a volatile memory part 21 at the intervals of fixed time as data while including the stopping state, when the storage area of this memory part 21 is turned to a saturated state, the data stored before are erased and new data are successively received. When an accident occurs, data on a prescribed time and minute from just before the accident to the occurrence of accident required for analyzing the accident are transferred/stored from the memory part 21 to a non-volatile memory part 22. At the same time, the device itself is locked by a lock means 8. Thus, the device efficiently and effectively utilizes a semiconductor memory 2, and the exact data can be presented to the third person who judges the accident.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an accident occurrence status recording apparatus capable of accurately analyzing an accident occurrence status of an automobile.

[0002]

2. Description of the Related Art If a collision accident occurs while a car is running, or if an accident occurs due to a driving mistake, or if a unilateral collision occurs even while the car is stopped, the situation can be accurately explained by the parties concerned. In many cases, it is not possible to give testimony, and it is difficult to take good measures such as acknowledging accidents and accurately grasping data for accident prevention.

[0003]

Therefore, if it is possible to objectively grasp the driving state at the time of occurrence of an accident, immediately before the occurrence of the accident, or the condition of the vehicle itself, the situation of the accident can be detected regardless of the testimonies of the parties concerned. The three can be accurately analyzed.

The present invention has been made under such circumstances, and an object of the present invention is to efficiently use a semiconductor memory to accurately analyze the occurrence state of an automobile accident. An occurrence status recording device is provided.

[0005]

In order to achieve the above-mentioned object, the present invention has a semiconductor memory means built in a housing having high impact resistance, and the semiconductor memory means in the housing is pulled out when an accident occurs. A device having locking means for preventing the vehicle, such as an impact sensor, a vehicle speed sensor, a wheel angle sensor, a brake sensor, a steering wheel sensor, etc., which is arranged at a predetermined position on the outer periphery of the vehicle body and detects the degree of impact with an external object. Driving state detection means including a vehicle body operation sensor, time counting means that is constantly operated by a driving power source, and counts the date and time, an input signal from the time counting means, and each of the driving state detection means. The input signal and the data are stored in time series at fixed time intervals, and when the storage area becomes saturated, A volatile memory unit that erases stored data and sequentially receives new input signals as stored data, and the data stored in the volatile memory unit can be transferred and stored for a required time. The semiconductor memory means including a non-volatile memory unit, the value of each input signal from the operating state detecting means, and the preset abnormal level value of each input signal are compared, and each value from the operating state detecting means is compared. When at least one of the input signal values exceeds the abnormal level value, an accident occurrence detection unit that outputs an abnormality occurrence signal and an abnormality occurrence signal is output from the accident occurrence detection unit and stored in a volatile memory unit. After the memory data of the operating state is transferred and stored in the non-volatile memory part for a predetermined time from the time of the accident to the time when the accident occurred, the lock that prevents the semiconductor memory means from being extracted. Characterized in that it comprises a means.

The semiconductor memory means may be a NOVRAM including a RAM which is a volatile memory section and an EEPROM which is a non-volatile memory section.

[0007]

According to the present invention, data relating to the driving state of the automobile is stored in the volatile memory portion including the stationary state in a time series at regular time intervals, and the storage area is saturated. In this case, the previously stored data will be erased and new data will be sequentially received and stored.In the event of an accident, data for the predetermined time from immediately before the accident to the time of the accident necessary for analyzing the accident. Is transferred and stored in the non-volatile memory unit, and the semiconductor memory means including the volatile memory unit and the non-volatile memory unit is locked so that it can be unlocked only by a third party, and an accident may occur. Accurate data at the time of an accident can be provided to a third party who makes a judgment.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is an external view showing an embodiment of the apparatus according to the present invention. In the figure, reference numeral 1 is a housing which is formed to have a high impact resistance and is mounted inside the vehicle body, and 2 is a semiconductor memory means such as an IC card which is inserted into the housing 1 through an opening 1a of the housing 1.

FIG. 2 is a block diagram of each means constituting the device according to the present invention. The entire apparatus is centralized and controlled by the CPU 3, and in addition to the semiconductor memory means 2 described above, the time counting means 4, the driving condition detecting means 5, the A / D conversion section 6, the accident occurrence detecting means 7, the locking means. 8 and the like.

The driving state detecting means 5 is arranged at a predetermined position on the outer periphery of the vehicle body and detects driving conditions such as a shock sensor 51, a vehicle speed sensor, a wheel angle sensor, a brake sensor, a steering wheel sensor, etc. The vehicle body operation sensor 52 for detecting

As shown in FIG. 3, the shock sensor 51 is arranged at a predetermined position such as the front, rear, left and right sides and the left and right side parts of the outer periphery of the vehicle body 8 and has a voltage value set initially when a constant shock is applied. For example, a pressure sensor that senses an obstacle or a proximity sensor that warns of an obstacle when it is difficult to visually check when moving in or out of a garage is used.

The vehicle body operation sensor 52 is a vehicle speed sensor which detects from the number of revolutions of the engine 52a and the clutch 52e,
A wheel angle sensor that detects the state of the tire 52b from the steering wheel 52f, a brake sensor that detects an acceleration state or a deceleration state from an accelerator or a brake, a steering wheel sensor that detects a steering wheel operation from the steering wheel 52f, and the like are used.

The time counting means 4 counts the date and time based on the clock signal. The time counting means 4 is constantly operated by a drive power source such as a built-in power source or an external power source. Therefore, particularly in the case of an externally supplied power source, it has a function of securing a power source necessary for transferring / storing data from the volatile memory unit 21 to the nonvolatile memory unit.

On the other hand, the semiconductor memory means 2 is composed of the volatile memory unit 21 and the non-volatile memory unit 22 as described above, but the volatile memory unit (RAM) 2
1 is an input signal from the time counting means 4 and an A / D
The respective input signals from the operating state detecting means 5 input via the conversion unit 6 are stored as data in a time series at regular time intervals.

The volatile memory unit (RAM) 2
When the storage area becomes saturated, 1 deletes the previously stored data and sequentially receives a new input signal as the stored data.

Nonvolatile memory unit (EEPROM) 22
Is to transfer and store the data stored in the volatile memory unit 21 from the time when the accident occurred until the time when the accident occurred in the stored data of the operating state, for example, for a predetermined time of about 5 minutes to 10 minutes.

Therefore, the semiconductor memory means 2 includes a volatile memory unit (RAM) 21 and a non-volatile memory unit (EEP).
ROM) 22 and is formed as a NOVROM.

The accident occurrence detecting means 7 compares the value of each input signal based on the operating state detecting means 5 with a preset abnormal level value of each input signal, and inputs each input signal from the operating state detecting means 5. If at least one of the above values exceeds the abnormal level value, an abnormal signal is output to the CPU 3.

When the abnormality occurrence signal is output from the accident occurrence detecting means 7, the operation state stored data stored in the volatile memory unit 21 by the operation of the CPU 3 is stored from before the accident occurs until when the accident occurs. Is transferred and stored in the non-volatile memory unit 22 for a predetermined time, and the lock means 8 is activated so that the semiconductor memory means 2 cannot be pulled out from the housing 1 by a party, and can be taken out only by unlocking by a third party. To do.

As described above, according to this embodiment, the operating state of the vehicle in the normal state is stored as data in the volatile memory unit 21 in a time series at regular time intervals including the stationary state, and When the storage area of the volatile memory unit 21 becomes saturated, the previously stored data is erased and new data is sequentially received. When an accident occurs, the accident is analyzed. The data for a predetermined time from immediately before the accident to the time when the accident is necessary for the transfer is transferred and stored from the volatile memory unit 21 to the non-volatile memory unit 22, and the device itself is locked. Therefore, it is possible to provide an accident occurrence status recording device that efficiently uses a semiconductor memory and provide accurate data to a third party who judges an accident.

[0021]

As described above, according to the present invention, there is provided an accident occurrence status recording device which efficiently utilizes a semiconductor memory, and at the same time, an accurate accident data is provided to a third party who judges an accident. can do.

[Brief description of drawings]

FIG. 1 is an external view showing an embodiment of an apparatus according to the present invention.

FIG. 2 is a block diagram showing each means constituting the device according to the present invention.

FIG. 3 is an explanatory diagram showing an arrangement of each sensor that constitutes the operating state detecting means shown in FIG. 2.

[Explanation of symbols]

 1 Housing 2 Semiconductor Memory 21 Volatile Memory Section 22 Nonvolatile Memory Section 3 CPU 4 Time Counting Means 5 Operating State Detecting Means 6 A / D Converter 7 Accident Occurrence Detecting Means 8 Locking Means

Claims (2)

[Claims] 1. A device having a semiconductor memory means built in a housing having high impact resistance and having a locking means for preventing the semiconductor memory means in the housing from being pulled out when an accident occurs, which is arranged at a predetermined position on the outer periphery of a vehicle body and is outside the vehicle. Driving state detection means consisting of a vehicle operation sensor such as an anti-impact sensor for detecting the degree of impact with an object, a vehicle speed sensor, a wheel angle sensor, a brake sensor, a steering wheel sensor, etc. , A time counting means for counting the date and time, an input signal from the time counting means, and each input signal from the operating state detecting means are time-sequentially stored as data at fixed time intervals, and a storage area When is saturated, the previously stored data is erased and new input signals are sequentially stored as stored data. A semiconductor memory means including a volatile memory section that receives data, and a nonvolatile memory section that can transfer and store data stored in the volatile memory section for a predetermined time, and an operating state detecting means. If the value of each input signal from the operating state detecting means exceeds at least one of the values of the input signals from the operating state detecting means, the value of each input signal from the Is an accident occurrence detection unit that outputs an abnormality occurrence signal, and the abnormality occurrence signal is output from the accident occurrence detection unit, and the stored operation state data stored in the volatile memory unit is used when an accident occurs before the occurrence of the accident. And a lock means for preventing the semiconductor memory means from being pulled out after being transferred and stored in the nonvolatile memory portion for a predetermined time. 2. The semiconductor memory means includes a RAM which is a volatile memory unit and an EEPR which is a non-volatile memory unit.
The vehicle accident occurrence status confirmation device according to claim 1, wherein the device is a NOVRAM including an OM.