Vehicle data recording device
First Claim
1. A vehicle data recording device, comprising:
- a vehicle status detecting sensor that detects a vehicle status while running;
a ring buffer including a first recording area that records a detection value of the vehicle status detecting sensor;
a recorder including a second recording area and a third recording area that record a detection value of the vehicle status detecting sensor; and
a recording controller configured to normally perform a normal operation in which the detection value of the vehicle status detecting sensor is periodically recorded in the first recording area of the ring buffer,wherein the ring buffer is configured to record a detection value of the normal operation in the second recording area and a larger detection value than a predetermined value of the detection value in the third recording area when the vehicle status detecting sensor generates the larger detection value,wherein the recording controller is configured to record the detection value of the vehicle status detecting sensor, which has already been recorded in the first recording area of the ring buffer, in the second recording area before the detection value of the vehicle status detecting sensor is periodically recorded in the first recording area of the ring buffer when the detection value of the vehicle status detecting sensor detects the larger detection value, and thereafter perform a recording operation, in which a new detection value of the vehicle status detecting sensor is recorded in the first recording area of the ring buffer while the new detection value of the vehicle status detecting sensor is recorded in the third recording area of the recorder, until the detection value of the vehicle status detecting sensor, which has already been recorded in the first recording area of the ring buffer when the vehicle status detecting sensor detects the larger detection value, is entirely recorded in the second recording area of the recorder, and thereafter perform the normal operation.
1 Assignment
0 Petitions
Accused Products
Abstract
Provided is a vehicle data recording device in which detection values of an acceleration sensor 210 and an driving status detecting sensor 220 are periodically and continuously recorded in a ring buffer 120, a detection value which has already been recorded in the ring buffer 120 is recorded in a specific recording area of a recorder 130 before a new detection value is recorded in the ring buffer 120 when a recording condition is satisfied, while the new detection value is periodically recorded in another recording area of the recorder 130, and recording is performed by the recorder 130 until all detection values which have already been recorded in the ring buffer 120 when the recording condition is satisfied are entirely recorded in a specific recording area of the recorder 130.
3 Citations
10 Claims
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1. A vehicle data recording device, comprising:
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a vehicle status detecting sensor that detects a vehicle status while running; a ring buffer including a first recording area that records a detection value of the vehicle status detecting sensor; a recorder including a second recording area and a third recording area that record a detection value of the vehicle status detecting sensor; and a recording controller configured to normally perform a normal operation in which the detection value of the vehicle status detecting sensor is periodically recorded in the first recording area of the ring buffer, wherein the ring buffer is configured to record a detection value of the normal operation in the second recording area and a larger detection value than a predetermined value of the detection value in the third recording area when the vehicle status detecting sensor generates the larger detection value, wherein the recording controller is configured to record the detection value of the vehicle status detecting sensor, which has already been recorded in the first recording area of the ring buffer, in the second recording area before the detection value of the vehicle status detecting sensor is periodically recorded in the first recording area of the ring buffer when the detection value of the vehicle status detecting sensor detects the larger detection value, and thereafter perform a recording operation, in which a new detection value of the vehicle status detecting sensor is recorded in the first recording area of the ring buffer while the new detection value of the vehicle status detecting sensor is recorded in the third recording area of the recorder, until the detection value of the vehicle status detecting sensor, which has already been recorded in the first recording area of the ring buffer when the vehicle status detecting sensor detects the larger detection value, is entirely recorded in the second recording area of the recorder, and thereafter perform the normal operation. - View Dependent Claims (4, 5, 6, 7, 10)
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2. A vehicle data recording device, comprising:
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a vehicle status detecting sensor that detects a vehicle status while running; a ring buffer including a fourth recording area that records N detection values of the vehicle status detecting sensor; a recorder including a fifth recording area that records at least 2N detection values of the vehicle status detecting sensor; and a recording controller that includes a first pointer which indicates an address of the fourth recording area of the ring buffer so that addresses are sequentially incremented from a first address until the number of detection values becomes equal to N, and the addresses are sequentially incremented returning back to the first address for every Nth detection values when the number of detection values exceeds N, a second pointer which indicates an address of the fifth recording area of the recorder so that the addresses are sequentially incremented from a second address, and a third pointer which indicates an address of the fifth recording area of the recorder so that the addresses are sequentially incremented from a third address, and that normally performs a normal operation, in which the detection value of the vehicle status detecting sensor is periodically recorded in the fourth recording area of an address indicated by the first pointer and then the first pointer is incremented, and records the detection value of the vehicle status detecting sensor, which has already been recorded in the fourth recording area of the address indicated by the first pointer, in the fifth recording area of the address indicated by the second pointer before the detection value of the vehicle status detecting sensor is periodically recorded in the fourth recording area of the ring buffer when the vehicle status detecting sensor detects a larger detection value than a predetermined value of the detection value, and thereafter periodically performs a recording operation for N times, in which a new detection value of the vehicle status detecting sensor is recorded in the fourth recording area of the address indicated by the first pointer and then the first pointer and the second pointer are incremented while the new detection value of the vehicle status detecting sensor is recorded in the fifth recording area of the address indicated by the third pointer and then the third pointer is incremented, and thereafter performs the normal operation. - View Dependent Claims (8)
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3. A vehicle data recording device, comprising:
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a vehicle status detecting sensor that detects a vehicle status while running; a ring buffer including a fourth recording area that records N detection values of the vehicle status detecting sensor; a recorder including a fifth recording area that records at least 2N detection values of the vehicle status detecting sensor; and a recording controller that includes a first pointer which indicates an address of the fourth recording area of the ring buffer so that the addresses are sequentially incremented from a first address until the number of detection values reaches N, and the addresses are sequentially incremented returning back to the first address for every Nth detection values when the number of detection values exceeds N, and a second pointer which indicates an address of the fifth recording area of the recorder so that the addresses are sequentially incremented from a second address, and that normally performs a normal operation, in which the detection value of the vehicle status detecting sensor is periodically recorded in the fourth recording area of an address indicated by the first pointer and then the first pointer is incremented, and records the detection value of the vehicle status detecting sensor, which has already been recorded in the fourth recording area of the address indicated by the first pointer, in the fifth recording area of the address indicated by the second pointer before the detection value of the vehicle status detecting sensor is periodically recorded in the fourth recording area of the ring buffer when the vehicle status detecting sensor detects a larger detection value than a predetermined value of the detection value, and thereafter periodically performs a recording operation for N times, in which a new detection value of the vehicle status detecting sensor is recorded in the fourth recording area of the address indicated by the first pointer and then the first pointer is incremented while the new detection value of the vehicle status detecting sensor is recorded in the fifth recording area of the address which is separated from the address indicated by the second pointer by a predetermined address increment and then the second pointer is incremented, and thereafter performs the normal operation. - View Dependent Claims (9)
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Specification