CN111474160A - Detect device that food mildenes - Google Patents

Abstract

The application provides a device for detecting food mildewing. The device for detecting food mildewing comprises a substrate, a light source, a filter layer, a detection circuit and a controller. The substrate is transparent. The light source is positioned on one side of the substrate and used for emitting light rays incident to food, so that the food absorbs the light rays and generates fluorescence when mildewing. The filter layer is located on one side of the substrate and used for filtering scattered light generated by the light entering the food and enabling the fluorescence to pass through. The detection circuit comprises a photosensitive sensor, the photosensitive sensor is located on one side, deviating from the substrate, of the filter layer and used for receiving fluorescence passing through the filter layer, and the detection circuit is used for outputting an electric signal indicating the intensity of the fluorescence received by the photosensitive sensor. The controller collects the electric signal and judges whether the food is mildewed or not according to the electric signal.

Description

Detect device that food mildenes

Technical Field

The application relates to the field of food detection, in particular to a device for detecting food mildewing.

Background

With the improvement of living standard, people pay more and more attention to food safety. In daily life, food mildew phenomenon is common, aflatoxin generated after food mildew is harmful to human bodies, but the food mildew degree is low, and the aflatoxin cannot be identified by naked eyes.

The existing scheme usually adopts immunoassay, biological identification method, thin layer chromatography and spectrometry to detect whether food mildew occurs. However, the existing detection method is complex in operation and cannot realize detection at any time.

Disclosure of Invention

The embodiment of the application provides a device for detecting food mildewing. The device for detecting food mildewing comprises:

a substrate, the substrate being light transmissive;

a light source positioned at one side of the substrate for emitting light incident to the food so that the food absorbs the light and generates fluorescence when mildewing;

the filter layer is positioned on one side of the substrate and used for filtering scattered light generated by the light incident to the food and enabling the fluorescence to pass through;

the detection circuit comprises a photosensitive sensor, the photosensitive sensor is positioned on one side, away from the substrate, of the filter layer and used for receiving the fluorescence passing through the filter layer, and the detection circuit is used for outputting an electric signal indicating the intensity of the fluorescence received by the photosensitive sensor;

and the controller is used for acquiring the electric signal and judging whether the food is mildewed or not according to the electric signal.

In one embodiment, the filter layers correspond to the photosensitive sensors one to one; the orthographic projection of the photosensitive sensor on the substrate falls within the orthographic projection of the corresponding filter layer on the substrate.

In one embodiment, an orthographic projection of the photosensitive sensor on the substrate is not coincident with an orthographic projection of the light source on the substrate.

In one embodiment, the device for detecting food mildewing further comprises a reflecting sheet positioned on the side, facing away from the substrate, of the light source; the orthographic projection of the light source on the substrate falls within the orthographic projection of the reflector plate on the substrate.

In one embodiment, the device for detecting food mildewing further comprises a light absorption film positioned on the side of the light source, which faces away from the substrate; the orthographic projection of the light source on the substrate falls within the orthographic projection of the light absorption film on the substrate.

In one embodiment, the light emitted by the light source has a central wavelength of 360 nm; and/or the bandwidth of the light emitted by the light source is less than or equal to 20 nm.

In one embodiment, the filter layer allows the fluorescent light to pass through in a wavelength range of 430nm to 450 nm.

In one embodiment, the light sensitive sensor comprises a light sensitive resistor.

In one embodiment, the device for detecting food mildewing further comprises a box body; the box is equipped with the cavity that is used for holding food, be equipped with on the wall of box with the holding tank of cavity intercommunication, the base plate the light source, the filter layer, detection circuitry reaches the controller holds the holding tank, the base plate is than the light source is close to the cavity.

In one embodiment, the device for detecting food mildewing further comprises a display panel, wherein the display panel is electrically connected with the controller and is used for displaying the result judged by the controller; and/or the presence of a gas in the gas,

the device for detecting food mildewing further comprises an alarm, and the controller starts the alarm to give an alarm when judging that the food mildews.

The device that detects food mildewing that this application embodiment provided, the base plate printing opacity, the light accessible base plate incident to food of light source transmission, absorb the light of incident and produce fluorescence when food mildewing, fluorescence passes the base plate and incides to photosensitive sensor behind the filter layer, and detection circuitry output instructs the signal of telecommunication of the fluorescence intensity that photosensitive sensor received, and then whether the controller can judge food mildewing according to the signal of telecommunication. The device for detecting food mildew provided by the embodiment of the application can detect food when the device is close to the food, is simple to operate, can detect in real time, and is beneficial to improving the use experience of a user; moreover, the filter layer can filter scattered light generated when light enters food, the scattered light is prevented from entering the photosensitive sensor to influence the detection accuracy, and the detection accuracy is high.

Drawings

FIG. 1 is a schematic structural diagram of an apparatus for detecting food mold according to an exemplary embodiment of the present application;

FIG. 2 is a schematic structural diagram of an apparatus for detecting food mold according to another exemplary embodiment of the present application;

FIG. 3 is a schematic structural diagram of an apparatus for detecting food mold according to still another exemplary embodiment of the present application;

FIG. 4 is a schematic structural diagram of an apparatus for detecting food mold according to another exemplary embodiment of the present application;

FIG. 5 is a schematic structural diagram of an apparatus for detecting food mold according to another exemplary embodiment of the present application;

fig. 6 is a schematic structural diagram of a box of the apparatus for detecting food mildew according to an exemplary embodiment of the present application.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The use of the terms "a" or "an" and the like in the description and in the claims of this application do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "plurality" includes two, and is equivalent to at least two. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

The following describes in detail the device for detecting food mold according to the embodiment of the present application with reference to the drawings. The features of the following examples and embodiments can be supplemented or combined with each other without conflict.

The embodiment of the application provides a device for detecting food mildewing. Referring to fig. 1 to 5, the apparatus 100 for detecting food mold includes a substrate 10, a light source 20, a filter layer 30, a detection circuit, and a controller. Wherein the substrate 10 is light-transmissive.

The light source 20 is positioned at one side of the substrate 10, and the light source 20 is used for emitting light incident to food, so that the food absorbs the light and generates fluorescence when mildewing. The filter layer 30 is located on one side of the substrate 10, and the filter layer 30 is used for filtering scattered light generated when the light is incident on the food and allowing the fluorescent light to pass through. The detection circuit comprises a photosensitive sensor 40, the photosensitive sensor 40 is located on a side of the filter layer 30 facing away from the substrate 10, the photosensitive sensor 30 is configured to receive fluorescence passing through the filter layer 30, and the detection circuit is configured to output an electrical signal indicating an intensity of the fluorescence received by the photosensitive sensor 30.

The controller is used for collecting the electric signals and judging whether the food is mildewed or not according to the electric signals.

The device that detects food mildewing, because the base plate printing opacity, the light accessible base plate of light source transmission incides to food, absorbs the light of inciding and produces fluorescence when food mildewing, and fluorescence incides to photosensitive sensor after passing the base plate and passing through the filter layer, and detection circuitry output instructs the signal of electric of the fluorescence intensity that photosensitive sensor received, and then whether the controller can judge food mildewing according to the signal of telecommunication. The device for detecting food mildew provided by the embodiment of the application can detect food when the device is close to the food, is simple to operate, can detect in real time, and is beneficial to improving the use experience of a user; moreover, the filter layer can filter scattered light generated when light enters food, the scattered light is prevented from entering the photosensitive sensor to influence the detection accuracy, and the detection accuracy is high.

Aflatoxin is generated when food mildews, after light emitted by the light source 20 is absorbed by the aflatoxin, electrons of the aflatoxin are transited from a ground state to an excited state, and the electrons in the excited state are unstable and can be transited to the ground state again. When the electrons transit from the excited state to the ground state, energy is released, and the released energy is released in the form of fluorescence. The light emitted from the light source 20 generates fluorescence when it is incident on the moldy food.

In one embodiment, the substrate 10 may be a glass substrate, which has a high light transmittance, and the light emitted from the light source 20 and the fluorescence generated from the food pass through the glass substrate. In other embodiments, the substrate 10 may be a plastic substrate or the like.

In one embodiment, apparatus 100 for detecting food mold includes a plurality of light sources 20 arranged in an array, a plurality of filter layers 30 arranged in an array, and a plurality of photosensitive sensors 40 arranged in an array. The plurality of light sources 20 and the plurality of light-sensitive sensors 40 may correspond one to one, and the plurality of light-sensitive sensors 40 and the plurality of filter layers 30 may correspond one to one. When the light source 20 irradiates moldy food, the generated fluorescence passes through the corresponding filter layer 30 and then enters the corresponding photosensitive sensor 40. By arranging the light sources 20, the filter layers 30 and the photosensitive sensors 40, multiple areas of food can be detected at the same time, which is beneficial to improving the detection efficiency; and the detection of multiple areas of food is helpful to improve the comprehensiveness and accuracy of the detection.

In one embodiment, the light source 20 is L ED (L light Emitting Diode). in some embodiments, the narrower the bandwidth of the light emitted by the light source 20 is mini L ED.. the narrower the bandwidth of the light emitted by the light source 20 is, the more favorable the generation of laser fluorescence. L ED emits light with a narrower bandwidth and higher stability, which helps to improve the detection accuracy, while L ED has a longer lifetime, which helps to improve the lifetime of the device for detecting food mold. L ED can be blue L ED, green L ED, or violet L ED.

In one embodiment, the light source 20 emits light having a center wavelength of 360 nm. The center wavelength of the light refers to the wavelength corresponding to the peak. The greater the absorption intensity of light emitted by light source 20 by aflatoxin, the greater the intensity of fluorescence produced by aflatoxin, and the absorption intensity of light emitted by light source 20 by aflatoxin is related to the wavelength of light emitted by light source 20. When the central wavelength of the light emitted by the light source 20 is 360nm, the light emitted by the light source 20 is absorbed by aflatoxin with higher intensity, and the intensity of the generated fluorescence is also higher, which is beneficial to improving the sensitivity of detection.

In one embodiment, the light source 20 emits light having a bandwidth less than or equal to 20 nm. The smaller the bandwidth of the light emitted by the light source 20, the higher the detection sensitivity of the device for detecting food mold. When the bandwidth of the light emitted by the light source 20 is less than or equal to 20nm, the detection sensitivity of the device for detecting food mildews can meet the detection requirement.

As can be seen from the Stokes rule, the wavelengths at the peak and center of the emission spectrum are always longer than the wavelengths at the peak and center of the excitation spectrum. I.e., the wavelength of the fluorescence emitted by the aflatoxin is greater than the wavelength of the light emitted by the light source 20. The wavelength (peak wavelength) of the fluorescence emitted from each substance is generally independent of the laser light source, and depends on the energy level structure of the substance to be detected itself. The light energy of the fluorescence with the wavelength of 430 nm-450 nm generated after the aflatoxin absorbs the light emitted by the light source 20 is larger.

In one embodiment, filter layer 30 may allow fluorescent light to pass through in a wavelength range from 430nm to 450 nm. That is, filter layer 30 allows light to pass through with a center wavelength of 440nm and a bandwidth of 20 nm. Therefore, light with high energy in fluorescence generated by aflatoxin can smoothly pass through the filter layer 30, and the device 100 for detecting food mildewing can effectively detect whether food mildews to generate aflatoxin.

The light sensitive sensor 40 is responsive to fluorescence or has a conversion function. The photosensor 40 is connected in a detection circuit that can output a signal indicative of the intensity of the fluorescence received by the photosensor 40 based on the response or conversion function of the photosensor 40 to the fluorescence.

In one embodiment, the light sensor 40 includes a light sensitive resistor and the electrical signal output by the detection circuit is a current signal.

When the energy of the light rays incident to the photoresistor is constant, the resistance value of the photoresistor is unchanged; when the energy of the light ray of incidenting to the photoresistor changes, the resistance of the photoresistor changes, specifically, when the energy of the light ray of incidenting to the photoresistor increases, the resistance of the photoresistor reduces, and when the energy of the light ray of incidenting to the photoresistor reduces, the resistance of the photoresistor increases. When the food is not mildewed, the energy of the light rays incident to the photoresistor is constant, and the resistance value of the photoresistor is not changed; when food is mildewed, fluorescent light is incident to the photoresistor, so that the resistance value of the photoresistor is reduced.

When the resistance value of the photoresistor changes, the current of the detection circuit changes, and the electric signal output by the detection circuit can be a current signal. Specifically, when the food does not go moldy, the food does not generate fluorescence, the intensity of the fluorescence incident to the photoresistor is zero, and the current signal output by the detection circuit is the first current signal; when the food mildews, the food can generate fluorescence, the intensity of the fluorescence which is incident to the photosensitive resistor is larger than zero, the resistance value of the photosensitive resistor can be reduced, the current signal output by the detection circuit is the second current signal, and the second current signal is larger than the first current signal. The greater the degree of food mildewing, the greater the intensity of fluorescence incident on the photoresistor, the smaller the resistance of the photoresistor, the greater the current signal output by the detection circuit. It is known that the electric signal output from the detection circuit when the food is mildewed is different from the electric signal output from the detection circuit when the food is not mildewed, and the degree of the food mildewing is different and the electric signal output from the detection circuit is also different.

In some embodiments, the detection circuit may include only a photo-resistor, or other resistor elements with fixed resistance may be connected to the detection circuit.

In one embodiment, the apparatus 100 for detecting food mold comprises a one-to-one correspondence of detection circuits and photo resistors connected in the corresponding detection circuits. In other embodiments, the device for detecting food mold comprises a plurality of detection circuits, the number of detection circuits is less than that of the photoresistors, one detection circuit can be connected with a plurality of photoresistors, and the change of the resistance value of any one of the photoresistors in the detection circuit can change the electric signal output by the detection circuit.

In other embodiments, the light sensitive sensor 40 may be other types of light sensitive sensors. For example, the light sensitive sensor may be a photodiode, which converts light signals into electrical signals. The intensity of the fluorescence incident on the photodiode is different, the magnitude of the reverse current of the photodiode is different, and the electrical signals output by the detection circuit are also different.

In one embodiment, photosensitive sensors 40 correspond one-to-one with filter layers 30. The orthographic projection of the photosensitive sensor 40 on the substrate 10 falls within the corresponding orthographic projection of the filter layer 30 on the substrate 10. So set up, almost all the filter layer 30 that will pass through corresponding of light of inciding to photosensitive sensor 40, filter layer 30 is high to the filtering efficiency of scattered light, can avoid scattered light to incide to photosensitive sensor 40 more effectively, and influences the signal of telecommunication of detection circuitry output, helps promoting the degree of accuracy of the testing result of the device that detects food moldy.

The orthographic projection of the photosensitive sensor 40 on the substrate 10 falls on the orthographic projection of the corresponding filter layer 30 on the substrate 10 means that the orthographic projection of the photosensitive sensor 40 on the substrate 10 is overlapped with the orthographic projection of the corresponding filter layer 30 on the substrate 10, or the orthographic projection of the filter layer 30 on the substrate 10 covers the orthographic projection of the corresponding photosensitive sensor 40 on the substrate 10, and the area of the orthographic projection of the filter layer 30 on the substrate 10 is larger than the area of the orthographic projection of the corresponding photosensitive sensor 40 on the substrate 10. In the illustrated embodiment, an orthographic projection of photosensitive sensor 40 on substrate 10 overlaps an orthographic projection of filter layer 30 on substrate 10, and in other embodiments, the orthographic projection of photosensitive sensor 40 on substrate 10 may be covered by the orthographic projection of filter layer 30 on substrate 10.

In one embodiment, the orthographic projection of the light sensitive sensor 40 on the substrate 10 falls outside the orthographic projection of the light source 20 on the substrate 10. I.e. the orthographic projection of the light sensitive sensor 40 on the substrate 10 does not coincide with the orthographic projection of the light source 20 on the substrate 10. With such an arrangement, the light emitted from the light source 20 can be prevented from being incident on the photosensor 40, which affects the accuracy of the electrical signal output by the detection circuit, and the detection accuracy of the device for detecting food mildew can be further improved.

In the illustrated embodiment, the orthographic projection of the photosensitive sensor 40 on the substrate 10 is not coincident with the orthographic projection of the corresponding light source 20 on the substrate 10, and the photosensitive sensor 40 is spaced apart from the other light sources 20, so that the orthographic projection of the photosensitive sensor 40 on the substrate 10 is not coincident with the orthographic projection of each light source 20 on the substrate 10.

In some embodiments, the intensity of the light emitted by the light source 20 is constant. Thus, even if the light emitted from the light source 20 is incident on the photosensor 40, the intensity of the light emitted from the light source 20 received by the photosensor 40 is constant, and the resistance value of the photo resistor is not affected by the light emitted from the light source 20, and the detection of the fluorescence is not affected. In this case, an orthogonal projection of the photosensitive sensor 40 on the substrate 10 and an orthogonal projection of the light source 20 on the substrate 10 may coincide.

In the illustrated embodiment, the light sources 20 are adjacent to the corresponding filter layers 30, and the orthographic projection of the photosensitive sensor 40 on the substrate 10 coincides with the orthographic projection of the corresponding filter layer 30 on the substrate 10. With such an arrangement, when the size of the apparatus 100 for detecting food mold is fixed, more light sources 20, filter layers 30 and photosensitive sensors 40 can be disposed, which is helpful for improving the detection accuracy.

In one embodiment, referring to fig. 4, the apparatus 100 for detecting food mold further includes a reflective sheet 50 positioned at one side of the light source 20; the orthographic projection of the light source 20 on the substrate 10 falls within the orthographic projection of the reflector 50 on the substrate 10. With such arrangement, among the light emitted by the light source 20, the light incident on the reflector 50 is reflected by the reflector 50, and the reflected light is incident on the food, so that the utilization rate of the light emitted by the light source 20 can be improved, and the reduction of the energy consumption of the device 100 for detecting food mildewing is facilitated; and the reflective sheet 50 can increase the energy of the light incident to the food, increase the energy of the light absorbed by the food, further increase the energy of the fluorescence generated by the food, and contribute to improving the detection sensitivity of the device for detecting food mildewing.

The fact that the orthographic projection of the light source 20 on the substrate 10 falls within the orthographic projection of the reflector 50 on the substrate 10 means that the orthographic projection of the light source 20 on the substrate 10 coincides with the orthographic projection of the reflector 50 on the substrate 10, or the orthographic projection of the light source 20 on the substrate 10 is covered by the orthographic projection of the reflector 50 on the substrate 10, and the area of the orthographic projection of the light source 20 on the substrate 10 is smaller than the area of the orthographic projection of the reflector 50 on the substrate 10.

In one embodiment, the reflective sheets 50 are in one-to-one correspondence with the light sources 20, and the orthographic projection of the light sources 20 on the substrate 10 falls within the orthographic projection of the corresponding reflective sheet 50 on the substrate 10. In the illustrated embodiment, the orthographic projection of the light source 20 on the substrate 10 coincides with the orthographic projection of the corresponding reflector 50 on the substrate 10. In other embodiments, the orthographic projection of the light source 20 on the substrate 10 may be covered by the orthographic projection of the corresponding reflective sheet 50 on the substrate 10.

In one embodiment, the material of the reflective sheet 50 may be metallic aluminum, metallic silver, etc., or other metallic materials may be used.

In another embodiment, referring to fig. 5, the apparatus 100 for detecting food mold further includes a light absorption film 60 located at one side of the light source 20; the orthographic projection of the light source 20 on the substrate 10 falls within the orthographic projection of the light absorbing film 60 on the substrate 10. With such an arrangement, in the light emitted from the light source 20, the light incident on the light absorbing film 60 is absorbed by the light absorbing film 60, so that the light emitted from the light source 20 can be prevented from being incident on the photosensitive sensor 40, which affects the magnitude of the electrical signal output by the detection circuit, and further affects the accuracy of the detection of the food mildew detection device 100.

In some embodiments, the light absorbing film 60 may be black, and the material of the light absorbing film 60 may be black resin, etc.

In one embodiment, the light absorbing films 60 are in one-to-one correspondence with the light sources 20, and the orthographic projection of the light sources 20 on the substrate 10 falls within the orthographic projection of the corresponding light absorbing film 60 on the substrate 10. In the illustrated embodiment, the orthographic projection of the light source 20 on the substrate 10 coincides with the orthographic projection of the corresponding light absorbing film 60 on the substrate 10. In other embodiments, the orthographic projection of the light source 20 on the substrate 10 may be covered by the orthographic projection of the corresponding light absorbing film 60 on the substrate 10.

In one embodiment, referring to fig. 1 and 2, the apparatus 100 for detecting food mold may further include a cover plate 70. The cover plate 70 is arranged on the side of the light-sensitive sensor 40 facing away from the substrate 10. The edge of the cover plate 70 and the substrate 10 is provided with a frame sealing adhesive 80. Thus, the cover plate 70, the substrate 10 and the frame sealing adhesive 80 form an accommodating space, and the light source 20, the filter layer 30 and the photosensitive sensor 40 are accommodated in the accommodating space.

In some embodiments, referring to fig. 1, photosensitive sensor 40 may be formed on cover plate 70 with a certain gap between photosensitive sensor 40 and filter layer 30. In other embodiments, referring to fig. 2, photosensitive sensor 40 may be formed on filter layer 30 in direct contact with filter layer 30.

In some embodiments, the material of the cover plate 70 may be glass. In other embodiments, other materials may be used for the cover plate 70.

In other embodiments, referring to fig. 3-5, the device 100 for detecting food mold may not include the cover plate 70.

When the device for detecting food mildew is prepared, if the device for detecting food mildew comprises the cover plate 70, the light source 20 and the filter layer 30 are firstly formed on the substrate 10, then the photosensitive sensor 40 is formed on the filter layer 30 or the cover plate 70, and finally the substrate 10 and the cover plate 70 are sealed by the frame sealing glue 80. If the apparatus for detecting food mold does not include the cover plate 70, the light source 20 and the filter layer 30 are first formed on the substrate 10, and then the photosensitive sensor 40 is formed on the filter layer 30. The apparatus 100 for detecting food mold has a simple overall structure, can be formed by a film deposition and etching process, and has a simple preparation process.

In one embodiment, the controller collects the electrical signal and judges whether the food is mildewed according to the electrical signal, and specifically includes: after the controller collects the electric signal, comparing the electric signal with a standard sample value; if the controller judges that the difference value of the electric signal and the standard sample value is in a specified range, determining that the food does not go moldy; and if the controller judges that the difference value between the electric signal and the standard sample value is not in the specified range, determining that the food is mildewed.

Wherein the standard sample value refers to an electric signal output by the detection circuit when the device for detecting food mildewing detects food which does not mildew. After the photosensitive sensor is used for a period of time, the sensitivity and the accuracy can be influenced to a certain extent, so that the electric signal output by the detection circuit and an actual value can have a certain deviation, and when the difference value between the electric signal and the standard sample value is in a specified range, the controller judges that the food is not mildewed.

In one embodiment, the device 100 for detecting food mold may include a control circuit for controlling the connection and disconnection between the power source and the detection circuit and the light source 20. When the control circuit controls the power supply to be communicated with the detection circuit and the light source 20, the detection circuit and the light source 20 work; when the control circuit controls the power supply to be disconnected with the detection circuit and the light source 20, the detection circuit and the light source 20 do not work. The control circuit may include a thin film transistor.

In one embodiment, referring again to fig. 1, the apparatus 100 for detecting food mildew may further include a flexible circuit board 92, and the control circuit may be integrated on the flexible circuit board 92, or the control circuit may be formed on the base plate 10 or the cover plate 70.

In one embodiment, the apparatus 100 for detecting food mold may be integrated into a portable device such as a bracelet, glasses, or the like. Therefore, the food detection device can be carried about by a user and used for detecting food at any time and any place.

In another embodiment, referring again to fig. 6, the device 100 for detecting food mold further comprises a box 90, wherein the box 90 is provided with a cavity (not shown in the figure, inside the box 90) for containing food. Be equipped with holding tank 91 on the wall of box 90, holding tank 91 and cavity intercommunication. The substrate 10 is closer to the cavity of the case 90 than the light source 20. Specifically, the light source 20 and the filter layer 30 are disposed on a side of the substrate 10 facing away from the cavity, and the photosensitive sensor 40 is disposed on a side of the filter layer 30 facing away from the cavity. In this way, the substrate 10, the light source 20, the filter layer 30, the detection circuit and the box 90 are integrated into a single structure, which is convenient for carrying. When food is detected, the food to be detected is placed in the cavity, light emitted by the light source 20 enters the food in the cavity through the substrate 10, the light emitted by the light source 20 is absorbed and fluorescence is generated when the food is mildewed, and the fluorescence enters the photosensitive sensor 40 after passing through the substrate 10 and the filter layer 30 in sequence.

In some embodiments, the box 90 may further include a cover covering the receiving groove 91, and the cover is opaque to light so as to prevent external light from being incident on the photosensor and affecting the detection accuracy.

In one embodiment, the apparatus 100 for detecting food mold further comprises a display panel 93, wherein the display panel 93 is electrically connected to the controller for displaying the result judged by the controller. In this way, the user can obtain the result judged by the controller through the information displayed on the display panel 93, which is more intuitive. Referring again to fig. 3, when the apparatus 100 for detecting food mold includes the case 90, the display panel 93 may be fixed to one side of the case 90.

In one embodiment, the apparatus 100 for detecting food mildew further comprises an alarm, and the controller activates the alarm to alarm when the food mildew is determined. Therefore, the alarm can give an alarm to prompt a user when judging that the food is mildewed. The alarm can give an alarm through vibration, sound or voice prompt.

It is noted that in the drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. Also, it will be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element or layer or intervening layers may also be present. In addition, it will be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element or intervening layers or elements may also be present. In addition, it will also be understood that when a layer or element is referred to as being "between" two layers or elements, it can be the only layer between the two layers or elements, or more than one intermediate layer or element may also be present. Like reference numerals refer to like elements throughout.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the application being indicated by the following claims.

It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.

Claims (10)

1. An apparatus for detecting food mold, comprising:

a substrate, the substrate being light transmissive;

a light source positioned at one side of the substrate for emitting light incident to the food so that the food absorbs the light and generates fluorescence when mildewing;

the filter layer is positioned on one side of the substrate and used for filtering scattered light generated by the light incident to the food and enabling the fluorescence to pass through;

the detection circuit comprises a photosensitive sensor, the photosensitive sensor is positioned on one side, away from the substrate, of the filter layer and used for receiving the fluorescence passing through the filter layer, and the detection circuit is used for outputting an electric signal indicating the intensity of the fluorescence received by the photosensitive sensor;

and the controller is used for acquiring the electric signal and judging whether the food is mildewed or not according to the electric signal.

2. The apparatus for detecting food mold according to claim 1, wherein the optical filter corresponds to the light-sensitive sensors one to one; the orthographic projection of the photosensitive sensor on the substrate falls within the orthographic projection of the corresponding filter layer on the substrate.

3. The apparatus of claim 1, wherein an orthographic projection of the light-sensitive sensor on the substrate is not coincident with an orthographic projection of the light source on the substrate.

4. The apparatus for detecting food mold according to claim 1, further comprising a reflective sheet located on a side of the light source facing away from the substrate; the orthographic projection of the light source on the substrate falls within the orthographic projection of the reflector plate on the substrate.

5. The apparatus for detecting food mold according to claim 1, further comprising a light absorbing film located on a side of the light source facing away from the substrate; the orthographic projection of the light source on the substrate falls within the orthographic projection of the light absorption film on the substrate.

6. The apparatus for detecting food mold according to claim 1, wherein the light emitted from the light source has a central wavelength of 360 nm; and/or the bandwidth of the light emitted by the light source is less than or equal to 20 nm.

7. The apparatus for detecting food mold according to claim 1, wherein the filter layer allows the fluorescence to pass through in a wavelength range of 430nm to 450 nm.

8. The apparatus for detecting food mold according to claim 1, wherein the light-sensitive sensor comprises a light-sensitive resistor.

9. The apparatus for detecting food mold according to claim 1, wherein the apparatus for detecting food mold further comprises a case; the box is equipped with the cavity that is used for holding food, be equipped with on the wall of box with the holding tank of cavity intercommunication, the base plate the light source, the filter layer, detection circuitry reaches the controller holds the holding tank, the base plate is than the light source is close to the cavity.

10. The apparatus for detecting food mildew according to claim 1, further comprising a display panel electrically connected to the controller for displaying the result judged by the controller; and/or the presence of a gas in the gas,

the device for detecting food mildewing further comprises an alarm, and the controller starts the alarm to give an alarm when judging that the food mildews.

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