CN210221804U

CN210221804U - Food quality analyzer

Info

Publication number: CN210221804U
Application number: CN201920648549.XU
Authority: CN
Inventors: Liuxing Sun; 孙流星
Original assignee: SHANGHAI INSTRUMENT PHYSICAL OPTICS INSTRUMENT CO Ltd
Current assignee: SHANGHAI INSTRUMENT PHYSICAL OPTICS INSTRUMENT CO Ltd
Priority date: 2019-05-08
Filing date: 2019-05-08
Publication date: 2020-03-31
Anticipated expiration: 2029-05-08

Abstract

A food quality analyzer comprises a U-shaped glass cuvette (1), the U-shaped glass cuvette (1) is fixedly arranged on a U-shaped glass cuvette mounting seat (2), the U-shaped glass cuvette mounting seat (2) is also provided with a miniature exciting coil (3), an LED light source (5) is arranged on one side of the bottom of the U-shaped glass cuvette (1), light that LED light source (5) sent can shine after condenser lens (6) become the parallel light on sample (4) that awaits measuring in U type glass cell (1), light process the sample (4) that awaits measuring is absorbed the back and is divided into two branches, and rethread imaging lens (8) focus on the part photosurface of area array CCD (9) after a branch road is split through beam splitting component (7), and another branch road is direct to be passed through imaging lens (8) focus is on another part photosurface of area array CCD (9). The resonance technology can completely realize the function of the food analyzer, the measurement function of the mass of the substance is added, and the whole instrument has simple structure, high reliability and low cost.

Description

Food quality analyzer

Technical Field

The utility model belongs to the technical field of the material analysis instrument, specifically say so and relate to a food quality analyzer.

Background

The density of a liquid is one of the important physical properties of a liquid, and the density method is one of the detection methods commonly used in food analysis and food safety detection. The density can help to know the purity of quality, doping condition and the like. With the development of science and technology, the rapid measurement of density is widely used in many fields. With the development of social economy, the existing pycnometer method and pycnometer method in the field of food analysis can not meet the market demand more and more, and at present, the pycnometer and pycnometer existing in a large number in the market are simple optical glass instruments, and the defects of complex operation, low measurement speed, high operation strength, low measurement precision and the like are adopted for aiming at the position of a comparative mark visually. Colorimetry is another common analysis method, can be used for quantitative or qualitative analysis of substances, and is widely used in the fields of chemistry, clinical medicine, life science, food, pharmacy, environmental monitoring and the like. Therefore, the photoelectric colorimeter is a basic instrument widely applied to food safety detection and biochemical medicine inspection. The existing food analyzer designed based on the colorimetric principle can only analyze the components and the content of a sample, cannot measure the density and the quality of an object, and limits the application range of the food analyzer.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a food quality analyzer to the technical defect that above-mentioned current food quality analyzer exists, adopting resonance technology can realize food quality analyzer's function completely, increased the measurement function of material quality, whole instrument simple structure, the reliability is high, low cost. The method can realize the colorimetric measurement of the quality and the luminosity of the substance without increasing the manufacturing cost, has the functions of video shooting and observing the defects of bubbles or impurities and the like in the measured substance, and further ensures the consistency and the correctness of the measurement result.

Technical scheme

In order to realize the technical purpose, the utility model provides a food quality analyzer, its characterized in that: it comprises a U-shaped glass cuvette, two ends of the U-shaped glass cuvette are fixedly arranged on a mounting seat of the U-shaped glass cuvette, the U-shaped glass cuvette mounting seat is also provided with a miniature exciting coil, a sample to be detected can enter the U-shaped glass cuvette from the sample inlet of the U-shaped glass cuvette 1 and flow out from the sample outlet of the U-shaped glass cuvette, the utility model discloses a U type glass cell, including U type glass cell bottom, the sample that awaits measuring in the U type glass cell, light that the U type glass cell bottom one side is provided with the LED light source, can shine after condensing lens becomes the parallel light on the sample that awaits measuring in the U type glass cell, light passes through the sample that awaits measuring is absorbed the back and is divided into two branches, and one branch is through the spectral component rethread imaging lens focus on area array CCD 9's part photosurface after splitting, and another branch is direct to be passed through imaging lens focuses on area array CCD's another part photosurface.

Further, the light splitting element is a triangular prism or a grating.

Further, the ARM controller controls the area array CCD.

Advantageous effects

The utility model provides a food quality analyzer adopts resonance technology can realize food analyzer's function completely, has increased the measurement function of material quality, whole instrument simple structure, and the reliability is high, low cost. The method can realize the colorimetric measurement of the quality and the luminosity of the substance without increasing the manufacturing cost, has the functions of video shooting and observing the defects of bubbles or impurities and the like in the measured substance, and further ensures the consistency and the correctness of the measurement result.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

Examples

As shown in the attached drawing 1, the food quality analyzer provided by this embodiment includes a U-shaped glass cuvette 1, two ends of the U-shaped glass cuvette 1 are fixed and mounted on a U-shaped glass cuvette mounting seat 2, a micro excitation coil 3 is further mounted on the U-shaped glass cuvette mounting seat 2, a sample 4 to be measured can enter the U-shaped glass cuvette 1 from a sample inlet 101 of the U-shaped glass cuvette 1 and flow out from a sample outlet 102 of the U-shaped glass cuvette 1, an LED light source 5 is arranged on one side of the bottom of the U-shaped glass cuvette 1, light emitted by the LED light source 5 becomes parallel light through a condensing lens 6 and then can irradiate on the sample 4 to be measured in the U-shaped glass cuvette 1, the light is divided into two branches after being absorbed by the sample 4 to be measured, one branch is divided into light through a light dividing element 7 and then focused on a part of a photosensitive surface of a CCD9 through an imaging lens 8, the other branch is directly focused on the other part of the photosensitive surface of the area array CCD9 through the imaging lens 8.

The light splitting element 7 is a triangular prism or a grating.

The ARM controller controls the area array CCD 9.

The use method of the food quality analyzer comprises the following steps:

firstly, preparing food to be detected into a liquid sample to be detected, sending the liquid sample to be detected 4 into the U-shaped glass cuvette 1 from the sample inlet 101 until the sample to be detected 4 flows out from the sample outlet 102, and ensuring that no air bubble exists in the U-shaped glass cuvette 1, indicating that the sample is full, and finishing sample introduction;

secondly, when the density and mass of a sample 4 to be measured are measured, the miniature exciting coil 3 is electrified to generate electromagnetic force to excite the U-shaped glass cuvette mounting seat 2 to generate vibration, so that the U-shaped glass cuvette 1 connected with the miniature exciting coil is caused to generate cantilever beam motion, and light sine change is caused in a light path;

then, a sine signal is obtained by adopting a photoelectric detection method and is fed back to the miniature exciting coil 3 through a 90-degree phase-shifting circuit, so that the resonance of the U-shaped glass cuvette 1 is realized; then detecting the resonance frequency through a frequency detection circuit, and calculating through an ARM controller through a formula 1 to realize the density and quality measurement of the sample;

the calculation formula is as follows:

f-the natural resonant frequency of the glass tube;

e-modulus of elasticity of the glass tube;

i-the section moment of inertia of the glass tube;

m-the mass of the glass tube;

Δ M-increased liquid mass inside the glass tube;

thirdly, when the photoelectric colorimetric measurement of the transparent liquid of the sample 4 to be measured is carried out, the white light emitted by the LED light source 5 of the instrument is changed into parallel light through the condensing lens 6, the parallel light directly irradiates the sample 4 to be measured in the U-shaped glass cuvette 1, and the light absorbed by the sample 4 to be measured is divided into two parts: one part of the light is split by a light splitting element 7, and is focused on a part of photosensitive surface of the area array CCD9 by an imaging lens 8, and absorption data of monochromatic light is obtained by calculation of an ARM controller through a data acquisition system and a formula 2, so that measurement of a photoelectric colorimeter is realized; and the other part of light is focused on the other part of light-sensitive surface of the area array CCD9 through the imaging lens 8, and an image of the U-shaped glass cuvette 1 is obtained through the data acquisition system and is used for detecting bubbles and impurities in the U-shaped glass cuvette 1 during sample loading.

The calculation formula is as follows: a ═ lg (I/I)₀) 2

A-absorbance of the liquid to be detected;

i-the intensity of light transmitted through the liquid to be measured;

I₀the intensity of light transmitted through the cuvette without the liquid to be tested.

The utility model provides a food quality analyzer and application method thereof adopts resonance technology can realize food analyzer's function completely, has increased the measurement function of material quality, and whole instrument simple structure, the reliability is high, low cost. The method can realize the colorimetric measurement of the quality and the luminosity of the substance without increasing the manufacturing cost, has the functions of video shooting and observing the defects of bubbles or impurities and the like in the measured substance, and further ensures the consistency and the correctness of the measurement result.

Claims

1. Food quality analyzer, its characterized in that: it includes U type glass cell (1), the fixed dress in U type glass cell mount pad (2) in both ends of U type glass cell (1), still be equipped with miniature excitation coil (3) on U type glass cell mount pad (2), sample (4) to be measured can follow introduction port (101) of U type glass cell (1) get into U type glass cell (1), follow the play appearance mouth (102) of U type glass cell (1) flow, U type glass cell (1) bottom one side is provided with LED light source (5), light that LED light source (5) sent can shine after condensing lens (6) become the parallel light on sample (4) to be measured in U type glass cell (1), light process to be measured sample (4) absorb the back and are divided into two branches, and a branch is through rethread imaging lens (8) focus on the part photosurface of area array CCD (9) after beam splitting component (7) is split And the other branch is directly focused on the other part of the photosensitive surface of the area array CCD (9) through the imaging lens (8).

2. The food quality analyzer of claim 1, wherein: the light splitting element (7) is a triangular prism or a grating.

3. The food quality analyzer of claim 1, wherein: the ARM controller controls the area array CCD (9).