Electronic apparatus and data recording method in electronic apparatus

• US 20030045977A1
• Filed: 09/03/2002
• Published: 03/06/2003
• Est. Priority Date: 09/03/2001
• Status: Active Grant

• Current Assignee: Pioneer Corporation
• Original Assignee: Pioneer Corporation
• Inventors: Sato, Tsuyoshi, Watanabe, Tomo, Oda, Tamami
• Granted Patent: US 6,804,590 B2
• Time in Patent Office: Days
• US Class Current: 701/35
• CPC Class Codes: B60W 20/00 Control systems specially adapted for hybrid vehicles hybrid vehicle design, B60K6/00; electric vehicles B60L
• CPC Class Codes: B60W 2556/50 of positioning data, e.g. GPS [Global Positioning System] data
• CPC Class Codes: B60W 50/0097 Predicting future conditions
• CPC Class Codes: G06F 1/28 Supervision thereof, e.g. detecting power-supply failure by out of limits supervision
• CPC Class Codes: G06F 1/30 Means for acting in the event of power-supply failure or interruption, e.g. power-supply fluctuations for resetting only G06F1/24
• CPC Class Codes: G06F 7/00 Methods or arrangements for processing data by operating upon the order or content of the data handled logic circuits H03K19/00

Abstract

In a vehicle-installed AV device, the power is supplied to various sections of the vehicle-installed AV device via a key switch from a battery of a vehicle. The vehicle-installed AV device is provided with: a predicting/detecting section for detecting a running state of the vehicle to predict an engine stop; a flash memory and a main memory for storing operation data of the vehicle-installed AV device; and a CPU for controlling the flash memory and the main memory. When the predicting/detecting section predicts the engine stop, the operation data stored in the main memory is written into the flash memory.

Claims

1. An electronic apparatus, wherein the electric power is fed thereto from an electric power supply installed in a movable body, and data representing an operation state of the electronic apparatus upon interruption of the power feeding thereto is recorded into a memory device, the electronic apparatus comprising:

an acquiring device for acquiring moving information representing a moving state of the movable body;

a predicting device for predicting an occurrence of interruption of the power feeding based on the acquired moving information; and

a writing device for writing the data into the memory device when the occurrence of interruption of said power feeding is predicted.

2. The electronic apparatus according to claim 1, wherein

the movable body moves relying on the motive power, and the electric power is fed to the electronic apparatus while the motive power is active;

the predicting device predicts stopping of the motive power of the movable body based on the acquired moving information and further predicts the occurrence of interruption of the power feeding by predicting the stopping of the motive power; and

the writing device writes the data into the memory device when the stopping of the motive power of the movable body is predicted.

3. The electronic apparatus according to claim 1, wherein the moving information includes at least one of stop information, speed information, acceleration information and vibration information of the movable body.

4. The electronic apparatus according to claim 3, wherein the moving information is any one of the speed information, the acceleration information and the vibration information and, when a value of the speed information, the acceleration information or the vibration information acquired by the acquiring device is no greater than a predetermined threshold value, the predicting device predicts the occurrence of interruption of the power feeding.

7. The electronic apparatus according to claim 1, wherein the electronic apparatus further comprises the memory device comprising a nonvolatile memory.

5. An electronic apparatus, wherein the electric power is fed thereto from an electric power supply installed in a movable body, and data representing an operation state of the electronic apparatus upon interruption of the power feeding thereto is recorded into a memory device, the electronic apparatus comprising:

a recognizing device for acquiring position information of the movable body to recognize a current position of the movable body;

a storing device for storing point information about one or more points registered in advance;

a predicting device for predicting an occurrence of interruption of the power feeding when the current position of the movable body is recognized within a preset region from the stored point; and

a writing device for writing the data into the memory device when the occurrence of interruption of the power feeding is predicted.

6. The electronic apparatus according to claim 5, wherein

the electronic apparatus performs a route search for the movable body based on information about a destination of the movable body and the recognized current position of the movable body, thereby to set a route to the destination of the movable body;

the storing device stores, as the point information, the destination or a stop-by point registered upon setting the route;

the predicting device predicts the occurrence of interruption of the power feeding when the current position of the movable body is recognized within the preset region from the stored destination or the stored stand-by point; and

the writing device writes the data into the memory device when the occurrence of interruption of the power feeding is predicted.

8. A data recording method in an electronic apparatus, wherein the electric power is fed thereto from an electric power supply installed in a movable body, and data representing an operation state of the electronic apparatus upon interruption of the power feeding thereto is recorded into a memory device, the data recording method comprising:

an acquiring process of acquiring moving information of the movable body;

a predicting process of predicting an occurrence of interruption of the power feeding based on the acquired moving information; and

a writing process of writing the data into the memory device when the occurrence of interruption of the power feeding is predicted.

9. The data recording method in an electronic apparatus according to claim 8, wherein

the movable body runs relying on the motive power, and the electric power is fed to the electronic apparatus while the motive power is active;

the predicting process predicts stopping of the motive power of the movable body based on the acquired moving information and further predicts the occurrence of interruption of the power feeding by predicting the stopping of the motive power; and

the writing process writes said data into the memory device when the predicting process predicts the stopping of the motive power of the movable body.

10. The data recording method in an electronic apparatus according to claim 8, wherein the moving information includes at least one of stop information, speed information, acceleration information and vibration information of the movable body.

11. A data recording method in an electronic apparatus, wherein the electric power is fed thereto from an electric power supply installed in a movable body, and data representing an operation state of the electronic device upon interruption of the power feeding thereto is recorded into a memory device, the data recording method comprising:

a recognizing process of acquiring position information of the movable body to recognize a current position of the movable body;

a predicting process of predicting an occurrence of interruption of the power feeding when the current position of the movable body is recognized within a preset region from point information representing one or more points registered in advance; and

a writing process of writing the data into the memory device when the occurrence of interruption of the power feeding is predicted.

12. The data recording method in an electronic apparatus according to claim 11, wherein

the electronic apparatus performs a route search for the movable body based on information about a destination of the movable body and the recognized current position of the movable body, thereby to set a route to the destination of the movable body;

the predicting process predicts the occurrence of interruption of the power feeding when the current position of the movable body is recognized within the preset region from the destination or a stand-by point registered upon setting the route; and

the writing process writes the data into the memory device when the occurrence of interruption of the power feeding is predicted.