KR970002324A - Reset signal generating device and method for optical distance measuring device - Google Patents

Abstract

The present invention provides an optical distance measuring apparatus using a laser. When various systems of a vehicle are connected to batteries and a power supply is not constant and impulsive noise is included in the power supply and the system is down, the external switch is used as a macro. The present invention relates to a method of generating a reset signal of an optical ranging apparatus that provides a reset signal to a processor so that normal operation can be performed. When a reset signal is generated, the microprocessor determines that the power-on reset signal resets the system and switches it on. If it is determined as a reset signal, it is again determined whether the current display state is on. If it is on, the display state is turned off and the whole system is turned off. If the current display state is off, the system is operated normally by turning on the display state.

Description

Reset signal generating device and method for optical distance measuring device

Since this is an open matter, no full text was included.

2 is a reset generation circuit of the present invention, FIG. 3 is a timing diagram of FIG. 2, and FIG. 4 is an operation flowchart of the controller of the present invention.

Claims (2)

A microprocessor (10) for controlling the entire system, and a laser driver (20) for outputting a laser driving signal according to the control signal of the microprocessor (10); A laser light emitting unit 30 for transmitting a laser to an object according to a driving signal of the laser driver 20; A laser receiver 50 receiving the laser beam reflected on the object 40; A reception signal processor 60 for determining a distance using the received laser; An optical distance measuring device comprising a distance display device 70 that displays input data to a driver and is provided with a power switch for system power control, the power switch of the distance display device 70 having a reset circuit for power on / off control. Reset signal generator of the optical distance measuring apparatus characterized in that. A first step (S1) of determining whether 5 bytes of RAM of the microprocessor is equal to AAH when a reset signal is generated in the system; A second step (S2) of recognizing a switch-on reset if the RAM 5 bytes of the microprocessor equal to AHH in the first step (S1) and determining whether the current display state is on again; In the first step (S1), if the RAM 5 bytes of the microprocessor is not equal to the AAH, it is determined as a power-on reset to record the 5 bytes of RAM inside the microprocessor as AAH, and to turn on the display state to turn on the whole system Step S3; A fourth step (S4) of turning on the display system by turning on the display state if the current display state is on in the second step (S2); And a fifth step (S5) in which the current display state turns on the display state and turns on the entire system in the second step (S2), thereby sequentially operating. ※ Note: The disclosure is based on the initial application.