JPS5677709A - Underground form measuring device for measure form, dimensions, inclination and its direction of underground hole - Google Patents

Abstract

PURPOSE: To ensure a simple and accurate measurement for the form of a hole, by radiating both the ultrasonic wave and the infrared rays toward the cross-section wall of the hole and at the same time providing the wave transmitter/receiver to receive the reflected wave plus the azimuth detector to detect the direction of the earth magnetism.

CONSTITUTION: The azimuth detector 2, transmitter/receiver 4 of ultrasonic wave and controller to generate the timing signal are stored in the sensor container 1. The container 1 is then hanged down into the ground via the hardware 7 to secure the recording of the detection signal to the recorder 6 via the cable 5. The position of the hole wall is detected from the time during which the reflected wave of the radiated ultrasonic wave returns and by the plural numbers of ultrasonic wave receiving elements distributed on the horizontal circumference of the container 1 with a fixed distance secured between. The detector 2 detects the rotating position of the code panel 12 interlocking the bar magnet 11 hanged down from the ceiling of the case 17 via the lamp 14 and the light sensor 15, and thus detects the azimuth. According to these detection signals, the form and dimensions of the hole are calculated through the form detector and then recorded to the recorder 6. In such way, the form and dimensions of the hole can be measured in a simple and accurate way.

COPYRIGHT: (C)1981,JPO&Japio