Sandstone moisture content detection equipment based on interdigital capacitor

Abstract

The invention discloses sandstone moisture content detection equipment based on an interdigital capacitor. The sandstone moisture content detection equipment based on the interdigital capacitor is simple in instrument structure, low in cost, simple in detection step, rapid in detection and high in detection precision. The equipment comprises a detection box, a capacitor assembly is arranged in the detection box, the capacitor assembly comprises an interdigital electrode plate, the interdigital electrode plate comprises a positive electrode plate and a negative electrode plate, and comb teeth of the positive electrode plate and comb teeth of the negative electrode plate are arranged in a staggered mode and do not make contact with each other; the capacitor assembly is connected with an impedance analyzer, the positive plate and the negative plate are respectively connected with corresponding contacts of the impedance analyzer, the impedance analyzer is connected with a PLC capable of processing data and fitting curves through data lines, the PLC is connected with an industrial control screen for displaying, and the impedance analyzer and the PLC are connected with a power supply and are powered by the power supply. The equipment is suitable for detecting the water content of the sandstone.

Description

【Technical field】 [0001] The invention relates to the technical field of material property detection equipment, in particular to a detection equipment for the water content of sand and gravel based on interdigital capacitance. 【Background technique】 [0002] The mass fraction of sand and stone aggregates in ordinary cement concrete is about 70-80%. The water content of sand and stone has a great influence on the quality of concrete. In the concrete production process, the water content in the mix ratio needs to be determined by the water content of sand and stone. , so it is necessary to test the moisture content of the sand and gravel raw materials. [0003] At present, the methods of testing moisture content can be divided into two categories: direct measurement method and indirect measurement method. The direct measurement method is mainly the manual drying method, which is often used in the actual production process of concrete. However, the manual drying method is not ...

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Problems solved by technology

The conductivity method (such as the Chinese utility model patent CN202020889544.9) is based on the principle that the resistance of the water-containing material changes with the change of its water content, so the water content can be obtained indirectly by measuring the conductivity of the material, but this method It is easily affected by the temperature, humidity and sample looseness of the environment, so the measurement accuracy is low; the cost of the microwave method (such as Chinese utility model patent CN202010513548.1) is high, and the measurement results are greatly affected by the bulk density of the material

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