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Rapid photoelectric detection method and device for cane sugar doping amount of tea leaves by using incandescent light source

A photoelectric detection and doping technology, which is applied in the direction of measuring devices, optical testing flaws/defects, scattering characteristics measurement, etc., can solve the problem that the detection of average optical properties is difficult to work, and achieve simple and convenient calculation and calibration, easy to carry, The effect of facilitating miniaturization or miniaturization

Pending Publication Date: 2021-07-23
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

Experience has shown that it is difficult to measure its average optical properties over a wide range of wavelengths, such as the entire visible or near-infrared band, but our experiments have shown that performing such detection at some specific infrared wavelengths can obtain better results. Effect

Method used

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  • Rapid photoelectric detection method and device for cane sugar doping amount of tea leaves by using incandescent light source
  • Rapid photoelectric detection method and device for cane sugar doping amount of tea leaves by using incandescent light source

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Embodiment

[0017] Such as figure 1 As shown, the method and device of the present invention were used to detect the same variety of tea samples with different sucrose content. The bases of the three tea samples in this group were the same commercially available Tieguanyin tea, which was mixed with 0%, 10% and 20% of ordinary sucrose by weight respectively. Sucrose is dissolved in a small amount of water and evenly sprayed on the tea leaves, dried and powdered to prepare samples (see GB / T 8303-2013 for details) and then used for testing. The powder sample container adopts the plastic shallow box of the same specification. As a demonstration, the measurement device is built on a 75×125mm 2 On the small plate, the optical path can be adjusted conveniently, and the device and samples can be tested on any platform. A 5V60mA ordinary miniature incandescent light bulb with a diameter of about 5mm was selected in the device as a wide-spectrum light source, driven by a 5V DC USB power supply,...

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Abstract

The invention discloses a rapid photoelectric detection method and device for the cane sugar doping amount of tea leaves by using an incandescent light source. According to the method, an incandescent lamp is used as a light source to irradiate a tea leaf sample, diffuse reflection light of the incandescent lamp is filtered by a narrow-band filter for specific wavelength related to sucrose components in the tea leaves; then, a photoelectric detector and an amplifier are used for detection; and the sucrose content of the tea leaf sample can be quantitatively or semi-quantitatively and rapidly determined according to the relative intensity of the diffuse reflection light with the specific wavelength. The detection device formed according to the method is composed of a miniature incandescent bulb, a driving direct-current power supply, a specific wavelength narrow-band optical filter, a photoelectric detection and amplification module, a direct-current digital voltmeter and a corresponding optical path, a sample placing part and the like, and a sample can be rapidly detected by combining the device with a corresponding algorithm. The method and the device can also be used for detecting other specific types of samples or other specific types of impurities, so that the method and the device are universal.

Description

technical field [0001] The invention belongs to the field of photoelectric detection, in particular to a method and device for rapid photoelectric detection of sucrose content in tea leaves using an incandescent light source. Background technique [0002] Undesirable impurities are often mixed in some foods. These impurities have been completely mixed with the food itself, and it is difficult to judge their existence and amount with the naked eye. For example: tea manufacturers may add sugar in the tea making process, mainly cheaper sucrose, which can be added by spraying sugar water and then drying. It has been completely mixed with the tea itself and cannot be judged by naked eyes. content. The purpose of tea manufacturers adding sucrose is mainly to increase the weight of tea with high value and make a profit. At this time, the amount added is often large; The amount added is often very small; the tea itself will also contain trace amounts of sucrose during the growth p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/47G01N21/01G01N21/95
CPCG01N21/01G01N21/4738G01N21/95G01N2021/4764
Inventor 张永刚刘梦璇王绪泉方家熊
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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