JPH01142857U - - Google Patents

Description

[Brief explanation of drawings]

1 and 2 are for explaining a specific embodiment of the salinity meter for concrete according to the present invention, and FIG. 1 shows a schematic circuit configuration of the main part of the signal processing section, FIG. 2 shows a schematic timing chart of the operations of its main components. 3 and 4 are for explaining the technical background of the present invention and the problems of the prior art, and FIG. 3 is a graph schematically showing the general characteristics of the chloride ion measuring electrode. FIG. 4 shows a schematic circuit configuration of a main part of a salinity meter for concrete as a comparative example, which can be considered with common sense from the prior art. DESCRIPTION OF SYMBOLS 1... Chlorine ion measurement electrode part, 2... Reference signal generator, 3... Moisture correction signal generator, 4... Signal switch, 5... A/D converter, 6... ROM,
6A...Memory unit for linearization processing, 6B...Memory unit for antilogarithmic conversion processing, 6C...Memory unit for calculating moisture correction coefficient, 7...Measurement/correction mode setting device, 8...Controller, 9... Fine aggregate/ready concrete mode setting device, 10...D/A converter, 11...
...Indicator, V...Electrode analog signal, _V0 ...Reference analog signal, VM...Moisture correction analog signal, VF...Feedback analog signal.

Claims (1)

[Claims for Utility Model Registration] (1) A chloride ion measuring electrode section that outputs an electrode analog signal approximately proportional to the logarithm of the chloride ion concentration contained in the measurement target, and a reference analog signal for the electrode tenalog signal. A reference signal generator, a moisture correction signal generator that can set and output an analog signal for moisture correction of any size according to the moisture content of the measurement target, and an A/D converter that converts the input analog signal into a digital signal. a D converter; a linearization processing memory unit for performing linearization processing on the digital signal input from the A/D converter; and an antilogarithmic transformation processing for performing the antilogarithmic transformation processing. and a moisture correction coefficient calculation memory unit for calculating a moisture correction coefficient according to the magnitude of the moisture correction analog signal from the moisture correction signal generator. , a D/A converter that converts a digital signal input from the ROM into an analog signal; an electrode analog signal from the chloride ion measuring electrode section; a reference analog signal from the reference signal generator; A feedback analog signal from the A converter and a moisture correction analog signal from the moisture correction signal generator are input, and each of these analog signals can be selectively output to the A/D converter. a signal switching device, a measurement mode for measuring the chloride ion concentration contained in the measurement target, and a moisture correction coefficient calculation mode for operating the moisture correction signal generator to set a moisture correction coefficient, a measurement/correction mode setter for switching settings; and when the measurement mode is set by the measurement/correction mode setter, the electrode analog signal and the reference analog signal are transmitted from the signal switcher to the A/D converter. In addition to outputting only the R
A preprocessing state in which only the linearization processing memory section of the OM is used, and only the feedback analog signal and moisture correction analog signal are output from the signal switcher to the A/D converter, and the ROM is Switching control of the signal switch and ROM is performed in a post-processing state in which only the memory section for anti-logarithmic conversion processing is used, and on the other hand, when the moisture correction coefficient calculation mode is set by the measurement/correction mode setting device, , from the signal switch to A/
Switching control of the signal switch and the ROM is made to output only the feedback analog signal and the moisture correction analog signal to the D converter, and to use only the moisture correction coefficient calculation memory section of the ROM. and a display device that displays a value corresponding to the digital output from the anti-logarithm conversion processing memory section or the moisture correction coefficient calculation memory section of the ROM. Salinity meter for concrete. (2) Two types of moisture correction coefficient calculation memories are written in the moisture correction coefficient calculation memory section of the ROM, one for fine aggregate measurement mode and one for ready-mixed concrete measurement mode. A fine aggregate/ready-mixed concrete mode setting device is provided for making switching settings for the ROM in a state where the memory for calculating the moisture correction coefficient for the ready-mixed concrete measurement mode is used and a state where the memory for calculating the moisture correction coefficient for the ready-mixed concrete measurement mode is used. A salinity meter for concrete as set forth in claim (1) of the utility model registration claim.