JPS621156U

JPS621156U -

Info

Publication number: JPS621156U
Application number: JP9195085U
Authority: JP
Priority date: 1985-06-18
Filing date: 1985-06-18
Publication date: 1987-01-07

Description

[Brief explanation of the drawing]

第１図および第２図はそれぞれこの考案の一実
施例のブロツク図、第３図は従来のグラウト濃度
検出装置のブロツク図である。１……γ線源、２……管体、３……γ線検出器
、４……カウンタ、９……割算器、１０……タイ
マ、１１……メモリ、１２……マイクロコンピユ
ータ、１３……線源強度の半減期補正強度算出回
路、１４……マイクロプロセツサ。なお、図中、
同一符号はそれぞれ同一、または相当部分を示す
。 FIGS. 1 and 2 are block diagrams of an embodiment of this invention, and FIG. 3 is a block diagram of a conventional grout concentration detection device. 1... Gamma ray source, 2... Tube, 3... Gamma ray detector, 4... Counter, 9... Divider, 10... Timer, 11... Memory, 12... Microcomputer, 13 . . . Half-life correction intensity calculation circuit for source intensity, 14 . . . Microprocessor. In addition, in the figure,
The same reference numerals indicate the same or corresponding parts.

Claims

[Claims for Utility Model Registration] (1) A gamma ray source attached to the outer wall surface of a tube through which grout flows, and a gamma ray source located opposite the gamma ray source with the tube interposed between the gamma ray sources. It has a gamma ray detector that detects gamma rays that have passed through the tube, and a timer that measures the elapsed time from the time when the gamma ray source is calibrated to the measurement time. means for calculating the half-life corrected intensity; means for standardizing the detected value of the gamma ray detector based on the half-life corrected intensity of the gamma ray source; and calculating the density and concentration of grout from the standardized detected value. A grout concentration detection device comprising: calculating means. (2) The means for calculating the half-life correction intensity of a gamma-ray source includes a timer, a memory that stores the half-life data of the gamma-ray source, reads out the clocked time of the timer at the time of measurement, and reads the measured time from the memory. The grout concentration detection device according to claim 1, which is comprised of a microcomputer that reads out and outputs half-life correction intensity corresponding to the measured time. (3) The means for calculating the half-life corrected intensity of the gamma ray source reads the timer and the time measured by the timer at the time of measurement, and performs a predetermined calculation to calculate the half-life corrected intensity of the gamma ray source from the measured time. A grout concentration detection device according to claim 1, which comprises a microprocessor for calculating the concentration of grout.