Piezoelectric beam sensor-based fragrant pear firmness sound and vibration nondestructive detection system and method

Abstract

The invention relates to a piezoelectric beam sensor-based fragrant pear firmness sound and vibration nondestructive detection system and a piezoelectric beam sensor-based fragrant pear firmness sound and vibration nondestructive detection method. The system consists of software and hardware systems. The software system comprises an HA-405 type voltage amplifier, a VibPilot vibration control and dynamic signal acquisition analyzer, a computer and the like. The hardware system comprises three Q220-A4-303YB type piezoelectric beam sensors, a fruit bed support material and the like. According to the system and the method, the three piezoelectric beam sensors are used for the first time, the equator part and the calyx end of a fragrant pear can be sensed at the same time, and a firmness detection model is constructed by virtue of a novel firmness evaluation method, and is free of influence of the fruit shape, so that the internal quality of the fruit can be judged more accurately and comprehensively, the grade and the commodity rate of the fragrant pear can be improved, and the problems of destructive detection, greater noise influence, high cost and the like of a fruit firmness detector on the current market are solved.

Description

technical field [0001] The invention relates to an acousto-vibration non-destructive detection system and method for the hardness of fragrant pears based on a piezoelectric beam sensor. Background technique [0002] Xinjiang Korla fragrant pear is known as the "king of fruits" and is a national geographical indication product. The quality difference of fragrant pears is mostly identified by hand feel and taste, which is inefficient and susceptible to subjective influence and misjudgment. Detecting the internal quality of fragrant pears to improve the grade and commodity rate of fragrant pears is of great significance for enhancing market competitiveness and healthy development of the fragrant pear industry. At present, the instruments for testing the hardness of fragrant pears mainly include: texture analyzer, hardness tester, SA-1 fruit firmness tester and HPE II Fff fruit firmness tester. Both texture analyzer and hardness tester belong to destructive testing. The Model ...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a system and method for non-destructive testing of the hardness of fragrant pears based on piezoelectric beam sensors. For the first time, three piezoelectric beam sensors can be used for sensing at the equator and calyx of fragrant pears at the same time. Construct a hardness detection model with the new index of hardness evaluation. This model is not affected by the change of fruit shape, and can judge the quality of the fruit more accurately and comprehensively, effectively reducing the phenomenon of high quality and low price of fragrant pears in the market, so as to improve Fragrant pear grades and commodity rates solve the problems of destructive testing of fruit hardness testing instruments on the market, greater influence by noise, and high prices

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