JPH0370312U - - Google Patents

Description

[Brief Description of the Drawings] Figs. 1 and 2 are block diagrams of optical position measuring instruments according to one embodiment and another embodiment of the present invention, and Fig. 3 is a block diagram of a conventional optical position measuring instrument. It is. In the figure, 1 is an object to be measured, 2 is a semiconductor laser, 5 is an optical position detection element, 6A and 6B are amplifiers, and 7
, 14 is a relay, 9 is a signal processing circuit, and 10 is a laser drive circuit. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims for Utility Model Registration] (1) A semiconductor laser that irradiates a light beam onto an object to be measured, and a semiconductor laser that receives scattered light of the light beam from the object to be measured at a predetermined angle and outputs a plurality of electrical signals. a head section that is electrically connected to the head section and installed at a distance; An optical position measuring device consisting of a signal processing circuit that calculates the position of an object to be measured by processing a plurality of amplified electrical signals, and a controller unit that includes a circuit that drives the laser light source. A relay in which both anode and cathode terminals of the semiconductor laser are connected to switching electrodes is disposed near the semiconductor laser, an excitation coil drive circuit for the relay is provided in the controller section, and an excitation coil drive circuit for the relay is provided in the controller section or inside the controller section. 1. An optical position measuring device, characterized in that the anode and cathode of the semiconductor laser can be controlled to be short-circuited and opened according to a command inputted from the outside. (2) a semiconductor laser that irradiates a light beam onto an object to be measured; an optical position detection element that receives scattered light of the light beam from the object at a predetermined angle and outputs a plurality of electrical signals; a head section equipped with an amplifying means for amplifying each electrical signal of the optical position detection element, and a plurality of electrical signals amplified by the head section, which are electrically connected to the head section and installed at a distance; An optical position measuring device comprising a controller unit including a signal processing circuit that calculates the position of an object to be measured by processing signals and a circuit that drives the laser light source, wherein An open/close relay is installed, and the anode terminal of the semiconductor laser is connected to the movable side terminal of the relay, and the cathode terminal is connected to the de-energized closed side terminal, respectively, and the positive voltage side of the drive signal output from the controller is connected to the relay. The negative voltage side is connected to the closed side terminal when energized, and the negative voltage side is connected to the closed side when de-energized, and an excitation coil drive circuit of the relay is provided in the controller section, and an input signal is input from the outside to the inside of the controller section or to the controller section. An optical position measuring device characterized in that the anode and cathode of the semiconductor laser can be controlled to be short-circuited and opened according to a command.