Frozen soil ultrasonic transducer support

Abstract

The invention relates to a frozen soil ultrasonic transducer support; a supporting plate, a left baffle and a right baffle are assembled by a low temperature resistant super glue adhesive into a base; a left pad block, a left pressure head, a left pad sheet, a transmitting transducer, a frozen soil sample, a receiving transducer, a right pad sheet, a right pressure head and a right pad block are in turn arranged between the left baffle and the right baffle; left and right screws are respectively arranged on the left baffle and the right baffle, the left and right screws are respectively corresponding to center positions of the left and right pressure heads or the left and right pad blocks, strain gages are pasted between the screws and the pressure heads or the pad blocks, the strain gages, the screws and the pressure heads or the pad blocks are together put into a temperature controllable test box, guide lines are led outside the box; and the strain gages and the transducers are respectively connected with external equipment strain gauge instrument and velocity meter by the guide lines. The frozen soil ultrasonic transducer support can fix an ultrasonic transducer and a frozen soil sample in the horizontal direction, avoid that the frozen soil sample is pressed by the weight of the frozen soil sample, micro strain value can be measured by the strain gauges between the screws and the pressure heads, the degree of contact between the transducers and the frozen soil sample can be accurately controlled, and the frozen soil wave velocity testing precision is improved.

Description

technical field [0001] The invention relates to a frozen soil ultrasonic transducer support. Background technique [0002] Ultrasonic testing is a kind of non-destructive testing. Using ultrasonic wave velocity to study the physical properties of rock and soil materials is a commonly used method at present. The acoustic wave testing method of rock has been included in the national standard (the engineering rock mass test method standard "GB / T 50266 -1199"). The use of ultrasonic wave velocity to study the elastic mechanical parameters of frozen soil is an important basis for the study of frozen soil. To conduct an ultrasonic wave velocity test, it is necessary to first purchase an ultrasonic transducer suitable for use at low temperature and a matching wave velocity meter, then develop a temperature-controllable test chamber, and finally place the ultrasonic transducer at both ends of the frozen soil sample and place them together. Put it into the temperature-controllable ...

AI Technical Summary

Problems solved by technology

Therefore, the transducer should be in close contact with the frozen soil sample, and generally coated with coupling agent, if the contact is not good, it will affect the ultrasonic passing time; in addition, if the ultrasonic transducer is placed directly on the sample vertically, the ultrasonic transducer The weight of the transducer will be pressed on the frozen soil sample, which will also affect the ultrasonic passing time

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