JP2007153033A - Travelling data recording system, vehicle and integrated circuit device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a travelling data recording system which keeps a record concerning a moving locus of a vehicle free to use as an evidence. <P>SOLUTION: This travelling data recording system 10 includes: an angular velocity sensor 20 to output an analog voltage value in accordance with rotating angular velocity of the vehicle; an analog processing circuit 30 to receive the analog voltage value 22, to convert it to a digital voltage value 36 and to output it; a travelling data recording means 50 to receive the digital voltage value 36 and write down the digital voltage value or a data formed in accordance with the digital voltage value as a travelling data in a temporary storage memory 80 free to rewrite in time series; a collision event detection means 40 to detect occurrence of a collision event in accordance with a specified signal 72; and a travelling data evacuating means 60 to read the travelling data for specified time including a specified period of time at least up to the time of occurrence of the collision event and to evacuate it to a non-volatile memory 100 for conservation when the collision event is detected. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a travel data recording system, a vehicle, and an integrated circuit device.

  A gyro is a sensor that measures the speed of rotation (rotational angular velocity) with respect to a rotational motion around a certain rotational axis. The “vibration gyro sensor” that is widely used today detects the angular velocity using the “Coriolis force”.

  For example, in a vibrating gyroscope that operates using the piezoelectric effect, when an AC voltage is applied to a gyro element (vibrating body such as a crystal), a Coriolis force is generated, and a current is generated according to the rotation rate and angular velocity. The current signal is amplified inside the gyro sensor, and a voltage proportional to the angular velocity is output.

  Recently, ultra-compact and low-power-consumption gyro sensors have been developed, packaged together with analog front-end circuits (including A / D conversion circuits), mounted on mobile phones and digital cameras, and used for image stabilization. Yes.

There is also a system for performing navigation by mounting a gyro sensor or the like on a vehicle.
JP-A-5-16699

  If the vehicle is currently driving dangerously, dangerous driving lethal injury will be applied, but it is difficult to apply because it requires evidence that the vehicle was driving dangerously (eg, meandering). there were.

  The present invention has been made in view of the technical problems as described above, and an object of the present invention is to provide a travel data recording system capable of taking a record of a moving locus of a vehicle that can be used as evidence. That is.

(1) The present invention
A vehicle driving data recording system,
An angular velocity sensor that detects the rotational angular velocity of the vehicle and outputs an analog voltage value corresponding to the rotational angular velocity;
An analog processing circuit that receives an analog voltage value corresponding to the rotational angular velocity output from the angular velocity sensor, converts the analog voltage value into a digital voltage value corresponding to the rotational angular velocity, and outputs the digital voltage value;
Receives a digital voltage value corresponding to the rotation angular velocity output from the analog processing circuit, and rewrites the digital voltage value corresponding to the rotation angular velocity or the data generated based on the digital voltage value corresponding to the rotation angular velocity as travel data in time series Traveling data recording means for writing to a possible temporary storage memory;
Collision event detection means for detecting the occurrence of a collision event based on a predetermined signal;
When a collision event is detected, at least a traveling data evacuation unit that reads out a predetermined amount of traveling data including a predetermined period until the occurrence of the collision event from a rewritable temporary storage memory and evacuates the nonvolatile storage memory;
It is characterized by including.

  The angular velocity sensor measures a rotational speed (rotational angular velocity) with respect to a rotational motion around a certain rotational axis and outputs an analog voltage value corresponding to the rotational angular velocity. For example, the angular velocity sensor may be a gyro sensor. Here, the type of gyro is arbitrary.

  The angular velocity sensor is mounted on the vehicle and detects a rotational angular velocity associated with the movement locus of the vehicle.

  The analog processing circuit is, for example, an analog front-end circuit, and may include a low-pass filter, an operational amplifier, an A / D converter, and the like.

  The temporary storage memory is a rewritable memory such as RAM or SRAM, and may be a volatile memory.

  In the temporary storage memory, a digital voltage value corresponding to the angular velocity output from the analog processing circuit or data generated with sound added to the digital voltage value is stored in time series as travel data. The travel data recording means stores the travel data in time series from the beginning of the temporary storage memory area to the end of the memory area, and performs write control so that it is overwritten again from the beginning when the end of the memory is reached.

  When the collision event is detected, the traveling data saving unit reads out the traveling data for a predetermined time including at least a predetermined period until the collision event occurs from the rewritable temporary storage memory and saves it in the nonvolatile storage memory. .

  Here, the travel data saved in the storage memory may include, for example, data after the impact occurrence, or only travel data before the impact occurrence.

  The travel data may be the digital voltage value itself output from the analog processing circuit or may be data obtained by compressing the digital voltage value.

  Further, the traveling data generated based on the digital voltage value may be stored in a rewritable temporary storage memory. The traveling data generated based on the digital voltage value may be approximate curve data generated based on the digital voltage value, for example.

  A collision event is an event for detecting the occurrence of a collision. For example, a collision event is defined in association with a change in a predetermined signal. For example, the state of a predetermined signal at the time of a collision, sudden braking, sudden stop, or sudden start, which is a phenomenon deeply related to an accident or the like, may be defined in advance as an impact event. When a change defined in the predetermined signal is made, it may be determined that an impact event has occurred.

  The nonvolatile storage memory can be constituted by a flash memory, an EEPROM, or the like, and the contents of the memory are not lost even when the power is turned off.

  The travel data recording unit, the travel data saving unit, and the collision event detection unit may be realized by causing a CPU or a microcomputer including the CPU to execute a predetermined program, or may be realized as a dedicated circuit. .

  According to the present invention, when a collision, sudden braking, sudden stop, or sudden start occurs, it is possible to acquire vehicle angular velocity data for a predetermined time until the occurrence as travel data. Since the vehicle movement trajectory (for example, meandering) can be analyzed by this angular velocity data, it is possible to record the vehicle trajectory that can be used as evidence in the event of an accident.

(2) The travel data recording system of the present invention
Including an acceleration sensor that detects the acceleration of the vehicle and outputs an analog voltage value corresponding to the acceleration;
The analog processing circuit includes:
Receives an analog voltage value corresponding to the acceleration output from the acceleration sensor, converts it to a digital voltage value corresponding to the acceleration, and outputs it.
The travel data recording means includes
A digital voltage value corresponding to the acceleration output from the analog processing circuit is received, and the digital voltage value corresponding to the acceleration or the data generated based on the digital voltage value corresponding to the acceleration is used as travel data in a rewritable temporary storage memory. Write.

  The acceleration sensor may be any sensor that is mounted on the vehicle and outputs a value corresponding to the acceleration as a voltage value. For example, the acceleration sensor may detect the acceleration by a capacitance method.

  For example, the acceleration sensor chip may be one in which the capacitance changes when acceleration is applied, and the amount of change is taken out as an electrical signal and output as a voltage proportional to the acceleration.

  A collision event is detected in the travel data recorded in the temporary storage memory (RAM, SRAM) rewritable by the travel data recording means and generated based on the digital voltage value corresponding to the acceleration or the digital voltage value corresponding to the acceleration. Then, the travel data including image data for a predetermined time including at least a predetermined period until the occurrence of the collision event is read from the rewritable temporary storage memory and saved in the nonvolatile storage memory.

  Information on collision, sudden start, and sudden stop can be acquired by the output of the acceleration sensor mounted on the vehicle.

  According to the present invention, when a collision, sudden braking, sudden stop, or sudden start occurs, it is possible to acquire vehicle acceleration data for a predetermined time until the occurrence as travel data. Since this acceleration data can analyze a vehicle collision, sudden start, sudden stop, etc., when an accident or the like occurs, it is possible to record a vehicle movement trajectory that can be used as evidence.

(3) The travel data recording system of the present invention
Including an acceleration sensor that detects the acceleration of the vehicle and outputs an analog voltage value corresponding to the acceleration;
The collision event detection means
It is determined whether or not a collision event has occurred based on the output value of the acceleration sensor.

  When the acceleration sensor is configured to output a voltage value corresponding to a change in acceleration, it may be determined that a collision event has occurred when the voltage output by the acceleration sensor exceeds a predetermined reference value. Good.

(4) The travel data recording system of the present invention
The collision event detection means
The vehicle is characterized in that it receives collision information detected for performing a given process and determines that a collision event has occurred based on the collision information.

  The collision information detected for the vehicle to perform a given process is, for example, a detection signal in the case of detecting a collision in order to perform a process of issuing an airbag at the time of the collision.

(5) The travel data recording system of the present invention includes:
Including the filming department,
The travel data recording means includes
The image data captured by the imaging unit is written as travel data in a rewritable temporary storage memory.

  The photographing means is preferably installed at a position where the situation of the front, rear or side of the vehicle can be photographed.

  The image data may be compressed and written to temporary storage data.

  The traveling data saving means stores image data stored in a temporary storage memory rewritable by the traveling data recording means for a predetermined time including at least a predetermined period until the collision event occurs when a collision event is detected. The running data included may be read from a rewritable temporary storage memory and saved in a nonvolatile storage memory.

  According to the present invention, when a collision, sudden braking, sudden stop, or sudden start occurs, image data (image data obtained by capturing the situation of the front, rear, or side of the vehicle) is taken for a predetermined time until the occurrence. It can be acquired as travel data. Since the situation of the accident can be analyzed by using this image data, it is possible to take a record of the movement trajectory of the vehicle that can be used as evidence in the event of an accident or the like.

(6) The travel data recording system of the present invention includes:
Including voice recording,
The travel data recording means includes
Voice data recorded by the voice recording unit is written as travel data in a rewritable temporary storage memory.

  The travel data saving means stores audio data stored in a temporary storage memory rewritable by the travel data recording means for a predetermined time including at least a predetermined period until a collision event occurs when a collision event is detected. The running data included may be read from a rewritable temporary storage memory and saved in a nonvolatile storage memory.

  According to the present invention, when a collision, sudden braking, sudden stop, or sudden start occurs, it is possible to acquire voice data photographed for a predetermined time until the occurrence as travel data. Since the situation of the accident can be analyzed by using the voice data, it is possible to record the movement trajectory of the vehicle that can be used as evidence when an accident or the like occurs.

(7) The travel data recording system of the present invention
The travel data saving means includes:
The travel data read from the rewritable temporary storage memory is saved in a nonvolatile storage memory, and then the storage memory is controlled to be write-inhibited.

  The storage memory may be controlled to be write-inhibited immediately after being saved in the storage memory, or the storage memory may be controlled to be write-inhibited after a predetermined time after being saved in the storage memory. .

(8) The travel data recording system of the present invention
Including clock means,
The travel data saving means includes:
The present invention is characterized in that the current time acquired by the clock means is stored in a nonvolatile storage memory in association with the corresponding travel data.

  The clock means includes, for example, an RCC interface that receives a signal from an external radio clock (RCC), and acquires the time of the radio clock (RCC-RFIC) via the radio clock interface circuit (RCCI / F) at a predetermined timing. The time of the internal clock (realized by the RTC function) may be corrected based on the radio clock time.

  Alternatively, the radio clock time may be acquired via the radio clock interface circuit at a necessary timing, and written in the storage memory based on the radio clock time.

(9) The travel data recording system of the present invention
The travel data saving means includes:
Receives information on whether or not the engine is operating, and if it is determined that the engine is not operating, control is performed so that writing to the storage memory is not performed after the engine stops or after a predetermined period of time. And

(10) The present invention
A vehicle equipped with the travel data recording system according to any one of the above.

(11) The present invention
An integrated circuit device including a CPU and functions as the travel data recording unit and the travel data saving unit according to any one of the above when the CPU executes a predetermined microprogram.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. The embodiments described below do not unduly limit the contents of the present invention described in the claims. Also, not all of the configurations described below are essential constituent requirements of the present invention.

  FIG. 1 is a diagram for explaining the configuration of the travel recording system of the present embodiment.

  The travel recording system 10 of the present embodiment includes an angular velocity sensor (gyro) 20. The angular velocity sensor 20 measures the rotational speed (rotational angular velocity) with respect to a rotational motion around a certain rotational axis, and outputs an analog voltage value 22 corresponding to the rotational angular velocity. The angular velocity sensor 20 may be a gyro sensor, for example. The gyro may be, for example, a vibrating gyroscope that operates using the piezoelectric effect. In this type, when an AC voltage is applied to the gyro element (vibrating body such as a crystal), a Coriolis force is generated, and the current depends on the rotation rate and angular velocity. Occurs. The current signal is amplified inside the gyro sensor, and a voltage proportional to the angular velocity is output. In addition, the kind of gyroscope is arbitrary, For example, the gyro sensor which applied MEMS (micro eiectro mechanical system) technology may be sufficient.

  The travel recording system 10 according to the present embodiment includes an analog processing circuit (analog front end circuit) 30. The analog processing circuit 30 includes a low-pass filter / op-amp circuit 32 and an A / D converter (A / D converter) 34, receives an analog voltage value 22 corresponding to the angular velocity, and outputs a digital voltage value 36 corresponding to the angular velocity. To do.

  The travel recording system 10 of the present embodiment includes a temporary storage memory 60. In the temporary storage memory, a digital voltage value 36 corresponding to the angular velocity output from the A / D converter is stored in time series. The temporary storage memory 60 is composed of a rewritable memory such as an SRAM, for example, and the angular velocity output from the A / D converter is stored in time series from the beginning of the memory area, and overwritten from the beginning again when reaching the end of the memory area. .

  The travel recording system 10 of the present embodiment includes an impact event detection unit 40.

  The impact event detection unit 40 detects the occurrence of a collision event based on a predetermined signal 72.

  Here, the predetermined signal 72 may be, for example, a signal output from the acceleration sensor 70. When the acceleration sensor 70 is configured to output a voltage value corresponding to a change in acceleration, it is determined that a collision event has occurred when the voltage output by the acceleration sensor exceeds a predetermined reference value. Also good.

  Further, for example, collision information detected for the vehicle to perform a given process may be received as a predetermined signal. The collision information detected for the vehicle to perform a given process is, for example, a detection signal in the case of detecting a collision in order to perform a process of issuing an airbag at the time of the collision.

  The travel recording system 10 of the present embodiment includes a travel data recording unit 50.

  The travel data recording unit 50 receives the digital voltage value 36 corresponding to the rotational angular velocity output from the analog processing circuit 30, and is generated based on the digital voltage value corresponding to the rotational angular velocity or the digital voltage value corresponding to the rotational angular velocity. Is written in the temporary storage memory 80 that can be rewritten in time series as the running data.

  The digital voltage value 36 corresponding to the rotational angular velocity output from the analog processing circuit 30 may be directly written in the temporary storage memory 80.

  In the temporary storage memory 80, a digital voltage value corresponding to the angular velocity output from the analog processing circuit 30 or data generated with sound added to the digital voltage value is stored in time series as travel data. The travel data recording unit 50 stores the travel data in time series from the beginning of the temporary storage memory 80 area to the end of the memory area, and performs write control so that the data is overwritten from the beginning again when reaching the end of the memory.

  The travel data recording unit 50 receives the digital voltage value corresponding to the acceleration output from the analog processing circuit 30, and uses the digital voltage value corresponding to the acceleration or the data generated based on the digital voltage value corresponding to the acceleration as travel data. Alternatively, a process of writing to the rewritable temporary storage memory 80 may be performed.

  The travel recording system 10 of the present embodiment includes a travel data saving unit 60.

  When a collision event is detected, the traveling data saving unit 60 reads at least a predetermined period of traveling data including a predetermined period until the collision event occurs from the rewritable temporary storage memory and saves it in the nonvolatile storage memory 100 Let

  The nonvolatile storage memory 100 can be constituted by a flash ROM, an EEPROM, or the like, and the contents of the memory are not lost even when the power is turned off. The travel recording system 10 according to the present embodiment may include a nonvolatile storage memory 100 as a configuration requirement, or may be provided outside the travel recording system 10 according to the present embodiment.

  Here, the travel data saved in the storage memory may be stored in memory, for example, after the impact occurs. The traveling data generated based on the digital voltage value may be approximate curve data generated based on the digital voltage value, for example.

  The travel data saving unit 60 may perform a process of storing the current time acquired by the clock unit 90 in the nonvolatile storage memory 100 in association with the corresponding travel data.

  The travel data saving unit 60 receives information on whether or not the engine is operating, and when it is determined that the engine is not operating, writes to the storage memory after the engine is stopped or after a predetermined period. You may make it perform the process controlled so that it may not exist.

  The impact event detection unit 40, the travel data recording unit 50, and the travel data saving unit 60 may be realized by causing a CPU or a microcomputer including the CPU to execute a predetermined program, or as a dedicated circuit. May be.

  The travel recording system 10 of the present embodiment may include an acceleration sensor 70.

  The acceleration sensor 70 may be any sensor that is mounted on the vehicle and outputs a value corresponding to the acceleration as a voltage value. For example, the acceleration sensor 70 may detect the acceleration by a capacitance method. For example, the acceleration sensor 70 may be one that changes its capacitance when acceleration is applied, extracts the amount of change as an electrical signal, and outputs it as a voltage proportional to the acceleration.

  The collision event detection unit 40 may receive the output value 72 of the acceleration sensor and determine whether or not a collision event has occurred based on the output value 72 of the acceleration sensor.

  The travel recording system 10 according to the present embodiment may include a clock unit 90. The clock unit 90 includes, for example, an RCC interface that receives a signal from an external radio clock (RCC) via the antenna 92, and the radio clock (RCC−) via the radio clock interface circuit (RCCI / F) at a predetermined timing. RFIC) time may be acquired and the time of the internal clock (realized by the RTC function) may be corrected based on the radio clock time.

  Alternatively, the radio clock time may be acquired via the radio clock interface circuit at a necessary timing, and written in the storage memory based on the radio clock time.

  FIG. 2 is a diagram for explaining the movement trajectory of the vehicle and the rotational angular acceleration (output as a voltage value) output by a gyro mounted on the vehicle.

  Here, when it is assumed that the vehicle 210 travels at a constant speed along the moving route 220, the vehicle 210 travels on a virtual circumference having a radius of curvature r1 centered on C1 in the vicinity of A, so the gyro is set to the rotational angular velocity θ1. Outputs the corresponding voltage.

  Further, in the vicinity of B, since the vehicle runs on a virtual circle having a radius of curvature r2 centered on C2, the gyro outputs a voltage corresponding to the rotational angular velocity θ2.

  FIG. 3 is a diagram for explaining voltage values output from the analog processing circuit.

  The horizontal axis is time t, and the vertical axis is voltage V. When the vehicle is rotating clockwise about a predetermined axis, the voltage takes a positive value as shown in the section 250, and the vehicle is rotating counterclockwise about the predetermined axis As shown in section 260, the voltage assumes a negative value.

  When the vehicle moves along a movement route as indicated by 220 in FIG. 2, the analog processing unit outputs a voltage value as shown in FIG. Here, it can be determined that the part where the voltage value is high, such as a, has a steep curve in the moving route of the vehicle.

  The output value of the gyro corresponding to the vicinity of A in FIG. 2 is a, and the output value of the gyro corresponding to the vicinity of B is b.

  The travel data recording unit of the present embodiment receives a digital voltage value corresponding to the rotational angular velocity output from the analog processing circuit, and is generated based on the digital voltage value corresponding to the rotational angular velocity or the digital voltage value corresponding to the rotational angular velocity. Is written as travel data in a rewritable temporary storage memory (RAM, SRAM).

  FIG. 4 is a diagram for explaining travel data stored in the storage memory in the present embodiment.

  310 is a value obtained by recording, in time series, a value obtained by changing the analog voltage value output from the gyro into a digital voltage value, and 320 is a travel locus of the vehicle calculated from the digital voltage value of 210.

  Reference numeral 332 denotes a point in time when the collision event detection unit of the present embodiment detects a collision event based on an external signal (when an impact event occurs).

  When a collision event is detected, the traveling data saving unit according to the present embodiment reads at least a predetermined period of traveling data including a predetermined period t until the collision event occurrence time 332 from a rewritable temporary storage memory, and is nonvolatile. Is saved in the storage memory.

  Here, the travel data saved in the storage memory may include, for example, the data after the impact occurrence time 332 or only the travel data before the impact occurrence time 332.

  Note that a digital voltage value as indicated by 310 may be stored in a rewritable temporary storage memory as travel data. The data obtained by compressing the digital voltage value may be stored in the rewritable temporary storage memory as travel data.

  Further, the traveling data generated based on the digital voltage value may be stored in a rewritable temporary storage memory. The traveling data generated based on the digital voltage value may be approximate curve data generated based on the digital voltage value, for example.

  Reference numeral 330 denotes an output value of the acceleration sensor (a value obtained by digital conversion in the analog processing unit). The acceleration sensor may be one that detects acceleration by a capacitance method, for example, and outputs a voltage value corresponding to a change in acceleration.

  The travel data recording processing unit receives a digital voltage value corresponding to the acceleration output from the analog processing circuit, and data generated based on the digital voltage value corresponding to the acceleration or the digital voltage value corresponding to the acceleration is used as the travel data. You may make it write in the rewritable temporary storage memory (RAM, SRAM).

  Here, at 332, the output voltage of the acceleration sensor changes due to a rapid change in the acceleration of the vehicle. In the present embodiment, for example, when a change in the output voltage of the acceleration sensor exceeds a predetermined reference value, it may be determined that a sudden stop (impact event) of the vehicle due to a collision or an accident has occurred. .

  The impact event is detected by receiving, for example, collision information detected by the vehicle for performing a given process (for example, a process of issuing an airbag at the time of a collision) as an external signal, and based on the collision information. May be detected.

  The travel data recording unit writes the image data captured by the imaging unit as travel data to a rewritable temporary storage memory (RAM, SRAM), and the travel data saving unit detects at least a collision event when a collision event is detected. The traveling data including image data for a predetermined time including the predetermined period t until the occurrence time 332 may be read from the rewritable temporary storage memory and saved in the nonvolatile storage memory.

  The travel data recording unit writes the voice data recorded by the voice recording unit as travel data into a rewritable temporary storage memory (RAM, SRAM), and the travel data saving unit detects at least a collision when a collision event is detected. The driving data including the audio data for a predetermined time including the predetermined period t until the event occurrence 332 may be read from the rewritable temporary storage memory and saved in the nonvolatile storage memory.

  FIG. 5 is a flowchart for explaining the flow of the travel data saving process of the present embodiment.

  First, it is determined whether or not an impact event has occurred based on the output of the acceleration sensor (step S10).

  Next, the traveling data for a predetermined period until the occurrence of the collision event held in the temporary storage memory is saved in the storage memory (step S20).

  Next, the time at the time of occurrence of the impact event is acquired from the clock unit, and is stored in the storage memory in association with the travel data (step S30).

  Then, the storage memory is set in a write-protected state (step S40).

  In addition, this invention is not limited to this embodiment, A various deformation | transformation implementation is possible within the range of the summary of this invention.

  In the above embodiment, the case where the value corresponding to the angular velocity data or the value corresponding to the acceleration data is recorded as the travel data has been described as an example, but the present invention is not limited to this.

  For example, a camera-like shooting unit is mounted on a vehicle, a running data recording unit writes image data taken by the shooting unit as running data into a rewritable temporary storage memory, and a running data saving unit detects a collision event. Then, the traveling data including image data for a predetermined time including at least a predetermined period until the occurrence of the collision event may be read from the rewritable temporary storage memory and saved in the nonvolatile storage memory.

  For example, a voice recording unit corresponding to a microphone is installed in a vehicle, and a traveling data recording unit writes the voice data recorded by the voice recording unit as traveling data to a rewritable temporary storage memory, and the traveling data saving unit detects a collision event. If detected, the travel data including audio data for a predetermined time including at least a predetermined period until the collision event occurs may be read from the rewritable temporary storage memory and saved in the nonvolatile storage memory. .

The figure for demonstrating the structure of the driving | running | working recording system of this Embodiment. The figure for demonstrating the movement locus | trajectory of a vehicle, and the rotation angular acceleration (it outputs with a voltage value) which the gyro mounted in the vehicle outputs. The figure for demonstrating the voltage value which an analog processing circuit outputs. The figure for demonstrating the driving | running | working data stored in the memory for a preservation | save. The flowchart figure for demonstrating the flow of a driving | running | working data saving process.

Explanation of symbols

10 traveling recording system, 20 angular velocity sensor, 22 analog voltage value corresponding to angular velocity, 30 analog signal processing circuit, 32 low-pass filter / op-amp, 34 A / D converter, 36 digital voltage value, 40 impact event detector, 50 traveling data Recording unit, 60 travel data saving unit, 70 acceleration sensor, 80 temporary storage memory, 90 clock unit, 100 storage memory

Claims (11)

A vehicle driving data recording system,
An angular velocity sensor that detects the rotational angular velocity of the vehicle and outputs an analog voltage value corresponding to the rotational angular velocity;
An analog processing circuit that receives an analog voltage value corresponding to the rotational angular velocity output from the angular velocity sensor, converts the analog voltage value into a digital voltage value corresponding to the rotational angular velocity, and outputs the digital voltage value;
Receives a digital voltage value corresponding to the rotation angular velocity output from the analog processing circuit, and rewrites the digital voltage value corresponding to the rotation angular velocity or the data generated based on the digital voltage value corresponding to the rotation angular velocity as travel data in time series Traveling data recording means for writing to a possible temporary storage memory;
Collision event detection means for detecting the occurrence of a collision event based on a predetermined signal;
When a collision event is detected, at least a traveling data evacuation unit that reads out a predetermined amount of traveling data including a predetermined period until the occurrence of the collision event from a rewritable temporary storage memory and evacuates the nonvolatile storage memory;
A travel data recording system comprising: In claim 1,
Including an acceleration sensor that detects the acceleration of the vehicle and outputs an analog voltage value corresponding to the acceleration;
The analog processing circuit includes:
Receives an analog voltage value corresponding to the acceleration output from the acceleration sensor, converts it to a digital voltage value corresponding to the acceleration, and outputs it.
The travel data recording means includes
A digital voltage value corresponding to the acceleration output from the analog processing circuit is received, and the digital voltage value corresponding to the acceleration or the data generated based on the digital voltage value corresponding to the acceleration is used as travel data in a rewritable temporary storage memory. A travel data recording system characterized by writing. In any one of Claims 1-2.
Including an acceleration sensor that detects the acceleration of the vehicle and outputs an analog voltage value corresponding to the acceleration;
The collision event detection means
A travel data recording system that judges that a collision event has occurred based on an output value of an acceleration sensor. In any one of Claims 1 thru | or 3,
The collision event detection means
A travel data recording system that receives collision information detected by a vehicle to perform a given process and determines whether or not a collision event has occurred based on the collision information. In any one of Claims 1 thru | or 4,
Including the filming department,
The travel data recording means includes
A travel data recording system, wherein image data captured by a photographing unit is written as travel data in a rewritable temporary storage memory. In any one of Claims 1 thru | or 5,
Including voice recording,
The travel data recording means includes
A running data recording system, wherein the voice data recorded by the voice recording unit is written as running data in a rewritable temporary storage memory. In any one of Claims 1 thru | or 6.
The travel data saving means includes:
A travel data recording system, wherein after the travel data read from a rewritable temporary storage memory is saved in a nonvolatile storage memory, the storage memory is controlled to be write-protected. In any one of Claims 1 thru | or 7,
Including clock means,
The travel data saving means includes:
A travel data recording system, wherein the current time acquired by the clock means is stored in a nonvolatile storage memory in association with the corresponding travel data. In any one of Claims 1 thru | or 8.
The travel data saving means includes:
Receives information on whether or not the engine is operating, and if it is determined that the engine is not operating, control is performed so that writing to the storage memory is not performed after the engine stops or after a predetermined period of time. A running data recording system.   A vehicle comprising the travel data recording system according to any one of claims 1 to 9.   An integrated circuit device comprising: a CPU, wherein the CPU functions as a travel data recording unit and a travel data saving unit according to claim 1 when the CPU executes a predetermined microprogram.

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