Pipeline delay-based system and method for measuring concentrations of components of fruit juice sugar

Abstract

The invention discloses a pipeline delay-based system and a method for measuring concentrations of components of fruit juice sugar. The system comprises a spiral pipeline sample cavity, a circuit box, an ultrasonic transmitting transducer and an ultrasonic receiving transducer, wherein the ultrasonic transmitting transducer and the ultrasonic receiving transducer are respectively located at the two ends of the spiral pipeline sample cavity; the circuit box is located outside the spiral pipeline sample cavity and is externally provided with display equipment; the circuit box comprises a main control unit, a memory, a transmitting circuit, a receiving circuit and a pulse detection decision circuit; the main control circuit is respectively connected with the memory, the transmitter circuit, the pulse detection decision circuit and the display equipment; the ultrasonic transmitting transducer is connected with the transmitting circuit in the circuit box, the ultrasonic receiving transducer is connected with the receiving circuit in the circuit box; and the receiving circuit is connected with the pulse detection decision circuit. In the method, the concentrations of the components of fruit juice are calculated through measuring the propagation time of ultrasonic in the spiral pipeline sample cavity. The method not only omits the step of calculating the sound speed to reduce the system computation but also effectively improves the detection accuracy.

Description

technical field [0001] The invention belongs to the technical field of fruit juice sugar component concentration detection, and in particular relates to a method and a device for calculating the concentration of glucose and sucrose in fruit juice by measuring the propagation time of ultrasonic waves in a spiral pipeline. Background technique [0002] Sugar is the main ingredient in fruit juice and beverages. The content of sugar directly affects the taste and nutritional value of fruit juice drinks. Therefore, sugar content detection is one of the most important analysis items in the fruit juice beverage industry. [0003] At present, there are several methods for measuring sugar content, but they all have their own shortcomings: traditional chemical analysis methods can detect reducing sugar, sucrose and total sugar content, but it is time-consuming and laborious; sugar concentration detection based on optical principles is mainly used to determine The total amount of sugar...

AI Technical Summary

Problems solved by technology

[0003] At present, there are several methods for measuring sugar content, but they all have their own shortcomings: traditional chemical analysis methods can detect reducing sugar, sucrose and total sugar content, but it is time-consuming and laborious; sugar concentration detection based on optical principles is mainly used to determine The total amount of sugar cannot distinguish the type of sugar and the content of each sugar; chromatography is currently the main method used to separate and quantify various sugars, among which gas chromatography and high performance liquid chromatography are separated and quantified Free sugar has high sensitivity and good selectivity, but the equipment is expensive

However, there are often large errors in short-distance ultrasonic speed measurement. This is because when the device judges the signal receiving time, it is difficult to accurately capture the peak value of the signal due to the influence of noise on the signal and the limited accuracy of the device itself, resulting in a judgment error.

When the volume of the sample container is limited, the ultrasonic propagation distance is too short, so that the actual propagation time of the signal is small, resulting in the measured value of the propagation time in middle, The proportion of can not be ignored, so the propagation time measurement value When substituting the formula "velocity = propagation distance ÷ propagation time" to calculate the speed of sound, the judgment error have a very significant impact on the calculation results

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