Device and method for measuring volume of irregular object

Abstract

The invention discloses a device and a method for measuring the volume of an irregular object. One side of a cavity of a Helmholtz resonator is provided with a door through which an object to be measured is put in or taken out and which is provided with a compaction mechanism; eight (or a plurality of) pipelines are uniformly distributed on the periphery of the upper end of the cavity; and a speaker is arranged in the middle of the cavity, and a microphone is arranged near one corner of the cavity and is connected with an amplifying circuit to form self-oscillation, so that the resonance frequency is generated. The method comprises the following steps of: putting the object to be measured in the cavity, wherein the resonance frequency of the object to be measured changes, and the variable quantity depends on the volume of the object to be measured which is put in the cavity; and sampling, expanding, quantifying and calculating the cycle of the resonance frequency by an electronic technology to obtain the volume of the object to be measured. The device can measure the volumes of solid and liquid which have any specific gravity; air is used as a medium, so the device is clean; the device measures the object with a small gap, or hole and does not influence the result value; and the device is easy to operate, and can be made into a small portable device, so the device is easy to popularize and use.

Description

technical field [0001] The "Helmholtz resonance principle" in the field of acoustics is applied to measure the volume of irregular objects in the field of metrology. Background technique [0002] Measure the volume of irregular objects such as: hydrostatic method - put a container with special water in the middle of the electronic scale, first weigh the weight G of the object to be measured in the air, and then immerse the object in water to measure its weight G 1 , the specific gravity of water Y 水 Perform temperature coefficient correction and calculate the volume of the measured object according to Get the specific gravity Y, weight G, and volume V of the measured object. The hydrostatic method has the following disadvantages: [0003] 1. It can only measure solids whose specific gravity is greater than that of water; 2. It needs special water, which increases the measurement cost and easily pollutes the measured object; 3. The deviation value of the object with sm...

AI Technical Summary

Problems solved by technology

[0003] 1. It can only measure solids whose specific gravity is greater than that of water; 2. It needs special water, which increases the measurement cost and easily pollutes the measured object; 3. The deviation value of the object with small gaps, small holes, and small holes is large; 4. The operation is relatively Complicated, difficult to make small and portable, and cannot be widely used

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