Power supply control device and power supply control method for in-vehicle camera

Abstract

A power supply control device (10) for an in-vehicle camera according to the present invention is provided with: a temperature sensor (11) for measuring the temperature inside a camera unit (1); a temperature data acquisition unit (12) that periodically acquires the measured temperature data; a predicted temperature calculation unit (13) that calculates a temperature gradient on the basis of the acquired temperature data set, and calculates a future predicted temperature of the camera unit (1) on the basis of the temperature gradient; a power supply unit (16) that supplies power to the image processing unit (3); a temperature determination unit (14) that determines whether or not the predicted temperature is within an operation guarantee temperature of a structural member of the camera unit (1); and a power supply control unit (15) that, on the basis of the determination result, issues a control command to start or stop the supply of power to the structural member by the power supply unit (16), and starts or stops the supply of power at an appropriate timing using the predicted temperature, thereby enabling the protection of the structural member at a high temperature quickly.

Description

technical field [0001] The present application relates to a power control device and a power control method of a vehicle-mounted camera. Background technique [0002] In recent years, in order to capture images of the surroundings of the own vehicle, an on-vehicle camera for shooting has been mounted on the vehicle more and more. In particular, the vehicle is equipped with an automatic collision prevention function that analyzes images captured by a camera unit installed on the inner side of the front windshield of the vehicle and monitors the front, and recognizes human bodies that may collide with the vehicle, The other vehicles and objects are the target object, and the vehicle control device is instructed to operate the brakes of the own vehicle as necessary to avoid the collision. In addition, the vehicle is equipped with an automatic lane keeping function that uses the camera unit to recognize the white lines drawn on the road surface indicating the left and right of ...

AI Technical Summary

Problems solved by technology

[0012] However, in the power control device of the vehicle-mounted camera of Patent Document 1 and the control device of the vehicle-mounted camera of Patent Document 2, the temperature sensor is used to measure the temperature near the imaging element, and the system stops when the temperature exceeds a preset reference value. Power is supplied to the imaging element, and the power supply starts when the temperature is lower than the reference value. However, depending on the usage environment of the vehicle camera, when the temperature changes greatly or the temperature changes rapidly, there is a problem that the power supply to the imaging element is started. The timing error will occur, and the protection measures for the camera element are not sufficient.

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