JPS5892934A - Optical detector for rottenness - Google Patents

Abstract

PURPOSE:To enable the automatic decision of rottenness of food through a comparatively simple device, by combining together ultraviolet rays producer and an optical detecting element for detecting only fluorescent light and converting it into an electric signal. CONSTITUTION:Food (a sample) 2 is irradiated with ultraviolet rays emitted from an ultraviolet rays producer 1. If the sample 2 is irradiated with ultraviolet rays, a fluorescent coloring matter, produced resulting from the rottenness, emits in blue, green, or red. An optical detecting head consists of the following parts: a lens 3a for collecting fluorescent light from the sample 2, an optical filter 3b which shuts off ultraviolet rays and transmits only visual light (fluorescent light), an optical detecting element 3c, which converts into an electric signal corresponding to a strength of light transmitting through the optical filter 3b, and consists of a photodiode, a phototransistor, a photoconductor cell, a solar cell, an photoelectric tube, and an electron multiplier, and a preamplifier 3d for amplifying the output of the optical detecting element 3c. From the measuring result, a threshold of a comparator 4b is previously set, and if a sample emits a fluorescent light exceeding the set threshold, the sample is decided as a rotten sample.

Description

[Detailed description of the invention]

This σ1 invention relates to a 15-character type rot extraction device for determining the quality of finished products. Determining whether a 1f 1 food is a fraud or a failure is done by human senses, that is. It can be done visually, olfactory, etc., or it can be done manually.
k! 1ilall count the quantity of details and calculate the σ
Depends on the size of 1 quantity

[There is. It is extremely difficult to automate biased σ) discrimination using such discrimination means. However, in the food processing industry, even if the product processing process was automated, it was natural for a person to determine the spoilage σ1 of the food as described above. Mass production of food processing was not possible. For this reason. Food spoilage σ] Automation of the determination method is 4! I was being abused. The invention of σ1 was made in view of the above circumstances, and the purpose is to provide an optical failure detection device that can independently determine the even number of foods using a relatively simple device. shall be. Embodiment 4 of this invention with reference to the drawings below! :f& To begin with, I will first describe IlaeMK, which spoils food. There are many different types of this retribution. σ) What is dealt with in the embodiments of the invention is pigment-producing bacteria (Pig+
It is a result of putrefaction caused by N. ented bacteria. When these pigment-producing cells proliferate in food, they produce pigments that exhibit a variety of colors. Among these, the embodiment of the present invention attempts to detect 1, which produces a fluorescent dye. Pseudomonas fluorescens 4 is a bacterium that kills photopigments.
(Paeudomonasf'1uorescens
), Alcaligenes @ (Aicaligens)
. Flavobacterium:i
m) and Proteus 4 (Prot, eua), etc. are known. These eyebrows are the cause of spoilage of meat, beef, eggs, etc. FIG. 1 shows a practical example of the present invention. Reference numeral 1 denotes an ultraviolet generator comprising an ultraviolet lamp or the like, and the wavelength of the ultraviolet rays emitted from this apparatus 1 is from 254 to 3B. The ultraviolet rays emitted from the ultraviolet generator 1 are irradiated onto the food (sample) 2 to be detected for spoilage. When the sample 2 is irradiated with ultraviolet rays, the fluorescent pigment produced by the decomposition emits blue, green, red, etc. light. Reference numeral 5 denotes an optical detection head, the details of which will be described later, which has a light-receiving portion of the detection head 3 facing the sample 2 and detects the light beam emitted from the sample 2 by the ultraviolet 111 irradiation. The detection head 3 converts the detected light beam into an electrical signal and supplies an increase m111m a K. The amplifying device 4 is configured to be able to compare and discriminate between a normal sample and a spoiled sample. In addition, the ultraviolet 11#! As outbreak cap 1

[is a low pressure mercury lamp,
It consists of a high-pressure mercury lamp, a xenon lamp, etc., and an optical filter that transmits only external rays and blocks visible rays. As shown in Figure 2, the optical detection head S includes a lens Sa that collects the fluorescent light from the sample 2, and an optical sensor that cuts off the ultraviolet edge and transmits only the visible light 11 (fluorescent light). A filter 5b and a photodetector element 'rc& It is formed of a preamplifier 3d that amplifies the output of this photodetector element 5cf1. The output of the preamplifier 34f1 of the detection head S is
It is input to the brewing device 4. The booster ttg device 4 is formed from a main amplifier 4a and a comparison vsab. In addition. 4C is a fluorescent intensity signal indicator meter, ・Main amplifier 4a
Connected to the output shaft of the Next, the operation of the embodiment configured as described above will be described. First, a normal, uncorrupted sample is used as sample 2. The normal sample is irradiated with ultraviolet rays from the ultraviolet generator 1, the optical detection head 3 detects the light emitted from the normal sample, and the measurement results are sent to the output of the amplifier 4. The threshold of the comparator 4b is set based on this measurement result. Therefore, if the sample emits fluorescent light that exceeds the set threshold, it is determined to be a % rotten sample. Q) By performing the discrimination in this way, it is possible to automatically discriminate between putrefied samples, and to do so quickly. Next, a specific example will be described. This embodiment is most useful when used in the production of mayonnaise using only fresh eggs. In the production of mayonnaise, there is no killing process such as heating, so it is especially important to use healthy eggs. For this reason, in the past, eggs that were as ## as possible were used, and before and after the eggs were broken, humans took measures to detect and remove rotten eggs by writing on a light beam, by ventilation, by appearance, etc. If this example is conveniently used in the process of spawning eggs after breaking the eggs,
Mechanization, self-spin, and unmanned egg production are possible. By the way, it is said that the failure of eggs is due to the various types mentioned above, but all of the above - except for Proteus orensis are called psychrophiles 1 and can proliferate even at low temperatures of 0 to 5 degrees Celsius.
Eggs that are often kept in cold areas often rot due to these gardens. Therefore, by using this embodiment, a loss of 11K can be detected quickly and without the human sense Kfi. As described below, the present invention includes an ultraviolet generator, an element that irradiates a sample with ultraviolet rays from the apparatus and detects fluorescent light emitted from the sample, and a device that detects the light detected by the element. Convert to electrical signal. Since the decomposition of the sample is detected from the difference from the preset normal sample, failure of the sample can be automatically detected, thereby increasing the speed of sorting out the decomposition of the sample. It was. It is possible to detect even numbers of V.C. family with high sensitivity, and it also measures the intensity of the fluorescent light, so it is possible to detect even numbers of V.C.
If corruption is caused by. It has the advantage of being able to determine the degree of corruption to a certain extent.

[Brief explanation of drawings]

FIG. 1 and FIG. 2 show an embodiment of this invention.
FIG. 1 is a schematic configuration diagram, and FIG. 2 is an explanatory diagram showing details of the detection device 1'11::11. 1... Ultraviolet generator, 2... Food (sample), 3.
...Optical detection head, 4...Amplification device, 3a...Lens. 3b... Optical filter, Sc... Photodetection element.

Claims (1)

[Scope of Claims] ... An ultraviolet radiation device that irradiates ultraviolet rays to a putrid sample, and when the raw material from this σ1 position is irradiated,
C: The sample emits fluorescent photomagnetic light, and this σ1 element is detected by a Yokode element that detects only the original light beam and converts it into an electrical signal, and the output of the σ) optical character detection element is amplified. A former academic-style rot extraction device that is equipped with a comparison and discrimination device that determines whether a sample is I-defective based on the output difference with a normal sample that has been placed on the needle side in advance.