CN214503322U - Food rapid detection system and food rapid detector - Google Patents

Abstract

A food rapid detection system and a food rapid detector are provided. The food rapid detection system comprises: the card module comprises cards, and each card is provided with a plurality of detection channels; the turntable mechanism comprises a positioning turntable, and the positioning turntable is used for bearing the card and driving the card to rotate; a signal acquisition module; the feedback signal module is used for feeding back a signal whether the card is put in and feeding back a positioning signal of the card; the motor control module is used for controlling the motor to rotate; the control module is used for receiving signals of the signal acquisition module, the feedback signal module and the motor control module and sending control signals to the signal acquisition module, the feedback signal module, the motor control module and the display module; the signal acquisition module comprises signal acquisition sensors and constant current light sources, and the number of the signal acquisition sensors is more than two. The food rapid detection system is high in detection efficiency.

Description

Food rapid detection system and food rapid detector

Technical Field

The utility model relates to an electricity field especially relates to a food short-term test system and food short-term test appearance.

Background

With the improvement of living standard, people pay more attention to their food safety, and the food safety problem affects the health and life stability of people. The food safety problem seriously threatens the health and life safety of people, in particular to pesticide residues, additives and the like. Therefore, various food detection methods are in force.

Typical food safety detection methods include colorimetric methods and immunocolloidal gold technology (immunecoloidal gold technology). The colorimetry is an analytical method for measuring the content of a substance by using the shade of color of a colored solution in analytical chemistry (conventionally, it is also called visual colorimetry because it is often observed and compared with the eye). The immune colloidal gold technology is a novel immune labeling technology which takes colloidal gold as a tracer marker and is applied to antigen antibodies; wherein the colloidal gold is prepared by polymerizing chloroauric acid (HAuCl4) into gold particles with specific size under the action of reducing agent such as white phosphorus, ascorbic acid, sodium citrate, tannic acid, etc., and is in a stable colloidal state due to electrostatic effect.

Referring to fig. 1, the principle of the immune colloidal gold technology is shown, which employs a bottom plate 2, and a sample pad 3, a colloidal gold pad 4, a nitrocellulose membrane 7 (the nitrocellulose membrane 7 has a test line 5 and a quality control line 6), and a water-absorbing filter paper 8 are sequentially disposed on the bottom plate 2 from left to right. Wherein, the left side of the colloidal gold pad 4 extends to the lower part of the sample pad 3, the other side is overlapped on the nitrocellulose membrane 7, and the left side of the absorbent filter paper 8 is overlapped on the nitrocellulose membrane 7. When in use, a corresponding sample reagent 1 is added on the sample pad 3, the sample reagent 1 firstly reacts with the colloidal gold pad 4, and then moves left and right under the action of the absorbent filter paper 8 to respectively pass through the test line 5 and the quality control line 6, so that a corresponding reaction result can be obtained.

In order to rapidly complete corresponding detection by using these typical food safety detection methods, a food rapid detection system and an instrument are developed. However, the existing food rapid detection system and apparatus have the condition that only a single channel or a single card can be tested at a time, the detection efficiency is low, and the identification has certain errors and needs to be improved.

SUMMERY OF THE UTILITY MODEL

The utility model provides a problem provide a food short-term test system and food short-term test appearance to improve corresponding detection efficiency, and improve the accuracy that detects discernment.

In order to solve the above problem, the utility model provides a food short-term test system, include: the card module comprises at least one card, and each card is provided with a plurality of detection channels; the turntable mechanism comprises a positioning turntable, and the positioning turntable is used for bearing the card and driving the card to rotate; the signal acquisition module is used for acquiring a detection result generated in the detection channel in the card; the feedback signal module is used for feeding back a signal whether the card is put in and feeding back a positioning signal of the card; the display module is used for displaying the detection result; the motor is used for driving the positioning rotary disc to rotate; the motor control module is used for controlling the motor to rotate; the control module is used for receiving signals of the signal acquisition module, the feedback signal module and the motor control module and sending control signals to the signal acquisition module, the feedback signal module, the motor control module and the display module; the signal acquisition module comprises signal acquisition sensors and constant-current light sources, and the number of the signal acquisition sensors is more than two.

Optionally, there are six cards, and each card has six detection channels; and each signal acquisition sensor acquires image signals of two detection channels in the same card.

Optionally, the feedback signal module includes an optocoupler reflecting tube circuit and a voltage comparator.

Optionally, the system further includes: the charging module is used for supplying power to the system; and the key module is used for inputting a control instruction to the control module.

In order to solve the problems, the utility model also provides a food rapid detector, which comprises cards, wherein each card is provided with a plurality of detection channels; the positioning rotary disc is arranged below the card and is provided with an in-situ positioning hole; the motor is arranged below the positioning turntable and used for driving the positioning turntable and the card to rotate; the image acquisition module is used for acquiring the image of the detection channel in the card; the feedback module is used for feeding back a signal whether the card is put in and a positioning signal of the card; the display module is used for displaying the detection result; the microcontroller is used for processing the detection data and controlling the detection operation; and an upper case and a lower case.

Optionally, one card includes six detection channels; the image acquisition module comprises three cameras, and each camera is used for the same image acquisition of two adjacent detection channels on the card.

Optionally, a fixing hole is formed in the middle of the positioning rotary disc, six clamping grooves are formed in the periphery of the fixing hole, and the clamping grooves are used for accommodating the cards.

Optionally, the image acquisition module comprises a constant current light source, and the constant current light source is two light equalizing plates.

Optionally, the instrument further comprises two sliding rails and a sliding block matched with the sliding rails, and the motor is mounted on the sliding block; the motor is provided with a motor fixing seat, and the positioning rotary disc is arranged on the motor fixing seat; the lower shell is provided with a bin door and a door cover, and the sliding block, the motor fixing seat and the positioning rotary disc can be pulled out and pushed out of the bin door.

Optionally, the upper shell is made of a black aluminum alloy shell; the motor is a stepping motor.

The utility model discloses in one of them aspect of technical scheme, provide a food rapid detection system of short-term test imaging technology, can utilize two kinds of cards of multichannel colorimetric method and colloidal gold card (can support two kinds of detection methods of colorimetric method and immune colloidal gold technique promptly), detect the poisonous and harmful substance and the remaining instrument of medicine of banned interpolation in the food. Wherein, the pollutant or other detected substance in the food can react with the detection reagent on the channel card to generate a colored compound, and the depth of the corresponding color of the colored compound is in direct proportion to the content in a certain range, so as to determine the content and the property (qualitative and quantitative analysis) of the unknown substance. And once can survey the multichannel, can adorn many cards in a location carousel, consequently, easy operation, detection are quick, have improved corresponding detection efficiency. Meanwhile, the corresponding detection cost is low, no pollution is caused, and the identification error is small.

Furthermore, in another aspect of the technical solution of the present invention, the food rapid detection system for rapid detection imaging technology has six cards, and each card has six detection channels; the signal acquisition sensor is set as an image collector, and the signal acquisition module comprises three image collectors; simultaneously, every signal acquisition sensor gathers same two in the card detecting channel's image signal to the realization can be through three at every turn image acquisition is carried out once to image acquisition, just detects six detecting channel on a card, realizes more efficient detection efficiency.

Further, the utility model discloses in another aspect of technical scheme, adopt step motor, location carousel and feedback module to combine together among the quick detecting system of food, can realize accurate, silence, quick channel switch.

Drawings

FIG. 1 is a schematic diagram of the principle of the immune colloidal gold technique of the embodiment;

FIG. 2 is a functional logic block diagram of a rapid food detection system provided by the embodiment;

fig. 3 is a circuit diagram of a motor drive circuit;

FIG. 4 is a circuit diagram of an optocoupler reflector tube for positioning signal feedback for a card;

FIG. 5 is a circuit diagram of an optocoupler reflecting tube for signal feedback of whether a card is placed;

FIG. 6 is a circuit diagram of an optocoupler reflector for a bin gate switch status signal;

FIG. 7 is a circuit diagram of a voltage comparator;

FIG. 8 is another voltage comparator circuit diagram;

FIG. 9 is a CMOS sensor circuit diagram;

FIG. 10 is a circuit diagram of an FPC board;

FIG. 11 is a serial port switching circuit diagram;

FIG. 12 is a circuit diagram of a fast charge;

FIG. 13 is a circuit diagram of a voltage divider circuit for fast and non-fast charging;

fig. 14 is an overall sectional view of the rapid food detector provided in the embodiment of the present invention;

fig. 15 is an exploded perspective view (exploded view) of fig. 14.

Detailed Description

The existing direct current motor is incomplete in forward and reverse rotation control circuit function, and the motor is easy to damage during working.

Therefore, the utility model provides a new food short-term test system and food short-term test appearance to solve the not enough of above-mentioned existence.

For a clearer illustration, the present invention will be described in detail with reference to the accompanying drawings.

The embodiment of the utility model provides a food short-term test system please refer to fig. 2, it includes:

a card module 210, the card module 210 including at least one card (not shown in fig. 2, refer to the embodiments described later in this specification, such as the card 21 in fig. 14 and 15), each card having a plurality of detection channels (not shown in fig. 2, shown in fig. 15);

a turntable mechanism 220, the turntable mechanism 220 including a positioning turntable (not shown in fig. 2, refer to the embodiments described later in this specification, such as the positioning turntable 22 in fig. 14 and 15), the positioning turntable being configured to carry the card and to rotate the card;

the signal acquisition module 110 is used for acquiring a detection result generated in a detection channel in the card;

a feedback signal module 120 for feeding back a signal indicating whether a card is placed and a positioning signal of the card;

a display module (not shown, refer to the embodiments subsequent to the present description) for displaying the detection result;

a motor (not shown, refer to the embodiments that follow the description) for driving the positioning turntable to rotate;

a motor control module 130 for controlling the rotation of the motor;

the control module 100 is configured to receive signals of the signal acquisition module 110, the feedback signal module 120, and the motor control module 130, and send control signals to the signal acquisition module 110, the feedback signal module 120, the motor control module 130, and the display module;

the signal acquisition module 110 includes two or more signal acquisition sensors 112 and constant current light sources 111.

In this embodiment, the number of cards (as described above, the cards refer to the contents of the following embodiments specifically) is six, and each card has six detection channels, so that the card may be called a six-channel card; the collecting sensor 112 is an image collector (specifically, a CMOS image collector or a CCD image collector), and the signal collecting module 110 includes three image collectors, that is, three collecting sensors 112; each signal acquisition sensor 112 acquires image signals of two detection channels in the same card (image signals are acquired while the positioning turntable stops rotating). The card sets up to a plurality ofly to, each sets up to have a plurality of detection channel, can provide the hardware basis for carrying out corresponding detection high-efficiently.

As can be seen from the above, in the present embodiment, six cards are provided, and each card has six detection channels; the signal acquisition sensor is set as an image collector, and the signal acquisition module comprises three image collectors; simultaneously, every signal acquisition sensor gathers same two in the card detecting channel's image signal to the realization can be through three at every turn image acquisition is carried out once to image acquisition, just detects six detecting channel on a card, realizes more efficient detection efficiency.

The design of one image collector for collecting the image signals of two detection channels in the same card also comprises that three image collectors (namely, the signal collecting sensors 112) are sequentially arranged along six detection channels of the card, the distances among the three image collectors are basically related, and the three image collectors are proper in distance with the card, so that the definition of the image is ensured, and the collection range of the three image collectors is proper. The structure ensures the high efficiency of detection.

Meanwhile, the number of the detection channels for setting a single card is two times of that of the signal acquisition sensors, so that the detection efficiency can be effectively improved.

The control module 100, i.e., a microcontroller (microprocessor), may be implemented by a single chip.

In this embodiment, the motor may be a stepping motor.

The motor control module 130 includes a motor drive circuit, which is shown in FIG. 3. In the circuit, an A3967 motor driving chip is adopted. The A3967 chip can provide perfect protection measures, including functions of suppressing transient voltage, protecting against overheating, preventing current from direct connection, and preventing under-voltage self-locking. No other interface circuit is required to be added between the A3967 chip and the control module 100, an Easy Stepper interface is adopted by the A3967 chip, 8 control lines are reduced by 2 (step control lines and direction control lines), and as long as pulses for controlling the stepping motor are simply input, the embedded converter can realize accurate control of the stepping motor.

In fig. 3, MS1 (letters on the chip correspond to the same under the corresponding pins named by the letter) and MS2 of a3967 chip are logical inputs for stepper motor subdivision resolution selection; DIR is a selection port of the motor running direction; RESET is used for resetting the initial value of the chip and shielding all external outputs; STEP is a pulse input port; OUT1A, OUT1B, OUT2A, and OUT2B are two pairs of output ports of the H-bridge; EN is an enabling end; SLEEP is a SLEEP mode; a resistor R9 connected with the SENSE1, and a resistor R20 of the SENSE2 are current detection resistors of an H bridge; REF is connected to a reference voltage.

In fig. 3, the circuit enables the stepper motor to be selected to the eight subdivisions with the highest subdivision resolution. Normally 200 pulses (1.8/Step) are required for one motor revolution and 1600 pulses if eight divisions are chosen. Eight subdivision resolutions can make the motor rotate more stably, and data repeatability is higher, but the required time will lengthen. The time for one rotation of the motor in eight subdivisions is found to be within an acceptable range through experiments, and therefore eight subdivisions are selected.

In this embodiment, the principle on which the card is based may be a colorimetric method or an immune colloidal gold technique.

Referring to fig. 4 to 8, the feedback signal module 120 includes an optocoupler reflective tube circuit and a voltage comparator.

Fig. 4 shows an optocoupler reflecting tube circuit for positioning signal feedback (may be referred to as origin positioning) of a card.

Fig. 5 shows an optocoupler reflective tube circuit for signal feedback (card detection for short) of whether a card is placed.

The feedback signal module 120 may further include a state signal feedback of the door opening and closing, in addition to the two detection feedback functions, that is, the corresponding instrument of the present system may have a corresponding door, and at this time, the feedback signal module 120 may detect whether the feedback door is closed.

Correspondingly, fig. 6 shows an optocoupler reflective tube circuit for a status signal of the door switch (door detection for short).

In the feedback signal module 120, the optocoupler reflective tube is adopted instead of the conventional key switch because: the optocoupler reflecting tube can realize automatic detection feedback; the optical coupling reflection tube is not in direct contact with the surface of the detection object, so that physical damage and mechanical errors caused by touch can be reduced; compared with the traditional key switch, the optocoupler reflecting tube has longer service life and stable work; because the input and the output of the optical coupler are isolated from each other, the electric signal transmission has the characteristics of unidirectionality and the like, thereby having good electric insulation capability and anti-interference capability.

Therefore, in the feedback signal module 120, three sets of optical coupling reflection tube circuits are used, and the optical coupling reflection tube circuits are matched with corresponding voltage comparators, so that detection of three feedback signals, namely, corresponding original point positioning, card detection, bin gate detection and the like can be realized.

In this embodiment, a mode that two voltage comparators are matched with three optical coupling reflection tube circuits is adopted, that is, two optical coupling reflection tube circuits shown in fig. 4 and 5 are matched with the voltage comparator shown in fig. 7, and one optical coupling reflection tube circuit shown in fig. 6 is matched with the voltage comparator shown in fig. 8.

Fig. 7 and 8 show that, in the present embodiment, both voltage comparators are implemented by using an LM393 chip. The LM393 chip normalizes (isolates) the original analog output signal. In the process from no shielding to complete shielding of the optocoupler reflecting tube, the output voltage may fluctuate up and down at 2.8V (microcontroller TTL level high level judgment threshold) due to reflection inside the instrument, so that misjudgment is caused. The LM393 chip can be adopted to compare the output signal of the optical coupling reflection tube with the reference voltage of 2.2V: when the output signal is greater than the reference voltage, 3.3V (high level) is output to the controller, and when the output signal is smaller than the reference voltage, 0V (low level) is output to the controller, so that the stability and reliability of the detection signal are stronger.

Specifically, the detection feedback function of the feedback signal module 120 is described by taking the location of the origin as an example: the reference voltage of the voltage comparator shown in fig. 7 is usually set to 2.2V, and when the card is turned to a certain position, so that the corresponding origin positioning structure (not shown, which may be a positioning through hole, such as an original positioning hole in a subsequent embodiment) on the positioning turntable does not reach a specified position, at this time, the receiving end of the optical coupling reflective tube circuit shown in fig. 4 is at a high level (pulled up by 3.3V), and the output end of the voltage comparator shown in fig. 7 outputs a stable high level of 3.3V; on the contrary, when the motor operates to move the corresponding origin positioning structure of the positioning turntable to a specific position, the receiving end of the optocoupler reflecting tube circuit shown in fig. 4 receives the positioning signal (e.g., the reflected signal) and outputs a low voltage (the low voltage may range from 0V to 1V), which is lower than the reference voltage (2.2V) of the voltage comparator shown in fig. 7, so that the output end of the voltage comparator can stably output a low level (from 0V to 1V), and at this time, the output voltages are respectively provided to the control module 100, thereby ensuring that the control module 100 reliably identifies the corresponding origin, i.e., the feedback signal module 120 realizes reliable origin positioning detection feedback.

After the positioning detection feedback is realized, the corresponding detection channel can be switched to the corresponding detection position only by controlling the positioning turntable to rotate by the corresponding angle (distance) (every time a certain point of the positioning turntable is detected, the single chip microcomputer commands the motor to stop rotating).

In the signal acquisition module 110, the constant current light source 111 may employ two large-area light uniformizing plates (refer to fig. 14 and 15). The embodiment can further combine with a constant current driving circuit to realize the stability of the light source and meet the requirement of system and instrument signal repeatability. Namely, the light-equalizing constant current circuit is used for the constant current light source 111, and can provide stable working current for channel detection so as to achieve the light equalizing effect.

In the signal acquisition module 110, the signal acquisition sensor 112 is implemented by an OV7725 high-definition micro-focus CMOS sensor, and the size of the CMOS sensor is 10mm × 10mm, so that the CMOS sensor does not occupy too much internal space of the instrument, and can be used in a plurality of groups in a combined manner. This COMS sensor focus 4.5mm, pixel 640 x 480 satisfies the utility model discloses the requirement of well high definition burnt a little.

As mentioned above, the number of the signal acquisition sensors 112 is more than two, specifically, in this embodiment, the number of the signal acquisition sensors 112 is three, and at this time, the three sets of CMOS sensor circuits are all constituent parts of the signal acquisition module 110. Each group of CMOS sensor circuits can acquire pictures of two adjacent channels in the corresponding card, so that for the six-channel card, the three groups of CMOS sensor circuits can acquire images of all channels of the card at one time just at the same time. Taking one group of cmos sensor circuits as an example, it can acquire images of a first channel and a second channel from the inside out.

Fig. 9 and 10 show that the CMOS sensor circuit mainly includes an AL422B chip circuit and an FPC holder.

Among them, the AL422B chip shown in fig. 9 is a FIFO memory chip with a storage capacity of 393216 bytes and X8 bits, and can be used in cmos sensor circuits because of its large storage space and fast read speed.

Fig. 10 shows the circuit structure of the FPC holder for connecting the camera module of the CMOS sensor. The data of the COMS sensor is written into the memory chip AL422B from the COMS sensor, and then read out from the chip and transmitted to the single chip microcomputer.

It should be noted that, when the principle of the immune colloidal gold technology is adopted, the corresponding positioning turntable is placed with a colloidal gold card, and in this case, only one circuit of the three sets of CMOS sensor circuits (i.e. one of the three CMOS sensors) may be used.

In this embodiment, the food rapid detection system further includes a charging module 140 for supplying power to the system.

In this embodiment, the charging module 140 may specifically be a fast charging module, and the corresponding fast charging circuit may increase the charging voltage of the instrument from the usual 6V to 12V, so as to reduce the required charging time of the instrument.

Fig. 11 and 12 show a serial port switching circuit (implemented by using an SGM7227YMS10G chip) and a fast charging circuit (implemented by using a single chip microcomputer STM32F030F4P 6) of the fast charging module.

Fig. 13 shows a corresponding voltage divider circuit for matching fast charge with non-fast charge. The single chip microcomputer can only output 3.3V and 0V, but the voltage required by the circuit is 0.6V, so that a voltage division circuit is required for voltage division.

In fig. 11, SGM7227YMS10G functions as a USB switch, normally accesses a USB line, and first switches to HSD1+ and HSD 1-by default.

Fig. 12 shows that the single chip microcomputer STM32F030F4P6 executes the QC2.0 protocol to determine whether the connected USB device supports the fast charging protocol. If the single chip microcomputer judges that the quick charging mode cannot be entered, the external USB is switched to the HSD2+ and the HSD2-, and equipment communication is carried out; if the rapid charging protocol is supported, maintaining the HSD1+ and the HSD 1-channel for rapid charging operation.

As can be seen from fig. 11, 12 and 13, the fast charging implementation process includes: when a USB line is connected to the left side connector CON1 in FIG. 11, the PA1 pin of the chip STM32F030F4P6 in FIG. 12 is set high, the PA2 and the PA4 are set low, so that QC _ D + maintains the handshake voltage of 1.5s, and at this time, the PA0, the PA2 and the PA4 in FIG. 13 are used as input pins to detect whether QC _ D-is lowered or not; if not, it indicates that the QC fast charge is not supported, if yes, the single chip outputs 0.6V voltage to QC _ D + and QC _ D-and the adapter enters the fast charge mode, and PA1, PA3, and PA5 in fig. 13 are used to output 0.6V voltage (trigger voltage signal), so that the adapter cooperates with the output voltage to be 12V.

In this embodiment, the food rapid detection system further includes a key module 150, configured to input a control instruction to the control module 100.

The system provided by the embodiment can support two detection methods, namely a colorimetric method and an immune colloidal gold technology. Wherein, the pollutant or other detected substance in the food can react with the detection reagent on the channel card to generate a colored compound, and the depth of the corresponding color of the colored compound is in direct proportion to the content in a certain range, so as to determine the content and the property (qualitative and quantitative analysis) of the unknown substance. And once can survey the multichannel, can adorn many cards in a location carousel, consequently, easy operation, detection are quick, have improved corresponding detection efficiency. Meanwhile, the corresponding detection cost is low, no pollution is caused, and the identification error is small.

The food rapid detection system provided by the embodiment combines the stepping motor, the positioning turntable and the feedback module, and can realize accurate, silent and rapid channel switching.

In the food rapid detection system provided by this embodiment, a fast charging circuit and a light-equalizing constant current circuit are added. The quick charging circuit can increase the charging voltage of the instrument to 12V, and reduce the time required by charging the instrument.

The utility model discloses continue to combine follow-up embodiment to continue to explain corresponding advantage.

The embodiment of the utility model provides a still provide a food short-term test appearance, please refer to fig. 14 and fig. 15 in combination.

The food short-term test appearance includes:

cards 21, each card 21 having a plurality of detection channels (not labeled, please refer to fig. 15, each card 21 having 6 detection channels);

a positioning dial 22, the positioning dial 22 being disposed below the card 21, the positioning dial 22 having a home-position positioning hole (not shown);

the motor 26 is arranged below the positioning turntable 22, and is used for driving the positioning turntable 22 and the card 21 to rotate;

an image acquisition module (not labeled) for acquiring an image of the detection channel in the card 21;

the feedback module is used for feeding back a signal whether the card 21 is put in and feeding back a positioning signal of the card 21;

the display module 10 is used for displaying the detection result;

the microcontroller is used for processing the detection data and controlling the detection operation;

and an upper housing 12 and a lower housing 28.

In this embodiment, the upper case 12 is made of a black aluminum alloy case. The shell can avoid the influence of external light on the operation of the instrument. In order to be installed in cooperation with the display module 10, in the present embodiment, the upper housing 12 is provided with a corresponding display screen installation window (as shown in fig. 15, not labeled). A circuit board 13 is provided below the middle of the upper case 12. In addition, there is a DC socket 11 for electrical connection of the display module 10 with the circuit board 13. It should be noted that the instrument may have corresponding keys, and the keys may be touch keys, and are integrated in the display module 10, so that the service life of the components may be prolonged.

In this embodiment, the battery 14 is provided on the lower right of the circuit board 13. The battery 14 is used for power supply, and, as described above, it can be charged using a charging module (quick charging module).

In this embodiment, the image capturing module includes the camera circuit board 15, and installs three cameras 151 (specifically can be CCD cameras or CMOS cameras) on the camera circuit board 15, and has three corresponding openings to cooperate with the camera fixing plate of three cameras 151.

The three cameras 151 and the card 21 have a matching design with 6 detection channels, which has the effect of further increasing the detection rate, and the corresponding structure is more adaptive, and reference can be made to the corresponding content of the foregoing embodiments.

In this embodiment, the image capturing module further includes a constant current light source, which is two light equalizing plates 17 (sheet light equalizing plates). As can be seen from the corresponding content of the foregoing system embodiments, the light equalizing plate 17 may correspond to a light equalizing constant current circuit or a constant current driving circuit. The light-equalizing constant-current circuit is used for the constant-current light source module and can provide stable working current for channel detection so as to achieve the light-equalizing effect. In addition, a glass plate 18 is added to the light-equalizing plate 17 in this embodiment. The constant current light source is set as two light equalizing plates 17, and the design that three cameras 151 and one card 21 have 6 detection channels in the embodiment is also considered, so that the final detection effect is improved. In this embodiment, the camera 151 is combined with the light-equalizing plate 17, and can perform imaging of the six-channel colorimetric card 21 or the colloidal gold card 21, so that color values of a plurality of channels on one card 21 can be detected simultaneously, and simultaneous quantification and qualitative of multiple channels are realized.

Referring to fig. 14 and 15, and particularly to fig. 15, a circuit fixing base 19 is further provided inside the fast food inspection apparatus for mounting and fixing the battery 14, the image capturing module and the circuit board 13.

Fig. 15 shows that the present embodiment has six cards 21, and one card 21 includes six detection channels (not labeled). As mentioned above, the image capturing module includes three cameras 151, and each camera 151 is used for capturing images of two adjacent detection channels on the same card 21, and reference may also be made to the corresponding contents of the foregoing embodiments.

The positioning rotary disc 22 has a fixing hole (not labeled) in the middle, and six slots (not labeled) are formed around the fixing hole, and one slot is used for accommodating one card 21.

In this embodiment, the turntable mechanism (please refer to the previous embodiment) further includes an upper turntable fixing base 23 and a lower turntable fixing base 24, which are used to fix the positioning turntable 22 on a motor fixing base 25 below the upper turntable fixing base. And motor 26 is fixed in motor fixing base 25 below, and the axis of rotation (not mark) of motor 26 is fixed with carousel fixing base 24 through the through-hole in the middle of carousel fixing base 24 down to make motor 26 can drive carousel fixing base 24 and rotate, and carousel fixing base 24 is together fixed with location carousel 22 down, consequently, motor 26 can drive location carousel 22 and rotate.

In the present embodiment, the motor 26 is a stepping motor, for which reference is made to the foregoing.

With continuing reference to fig. 14 and 15, the food rapid-inspection apparatus further includes two slide rails 27 and a slide block 271 engaged with the slide rails 27. The food speed monitor also includes a rebound lock 272. The lower case 28 has a bin door (not labeled) and a door cover 281. After the door cover 281 is opened, the slider 272, the motor 26, the motor holder 25, the positioning turntable 22, and the like can be pulled out and pushed in from the door, so as to facilitate the replacement of the card 21 in the positioning turntable 22. At this time, self-locking and interpretation of the corresponding push-pull process (self-locking after pushing the corresponding structure to the innermost portion, and rebound unlocking when the corresponding structure is to be pulled out) are achieved by the slide rail 27, the slider 271, and the rebound self-locker 272.

The food rapid detector that this embodiment provided is an instrument of short-term test imaging technique, can utilize two kinds of cards of six-channel colorimetry and colloidal gold, detects the poisonous and harmful substance and the medicine residue of banned adding in the food, and pollutant or detection material react with the detect reagent on the six-channel card, generates coloured compound, and the colour depth is directly proportional with the content in certain extent to this content and the nature of survey unknown material. The method has the advantages of low test cost, no need of the cooperation of other instruments, simple operation, high test speed (multiple channels can be tested at one time, multiple cards can be loaded in the instrument at one time), and the like. And the test result is accurate, and qualitative analysis and quantitative analysis can be performed.

The food short-term test appearance that this embodiment provided adopts the mode that camera and equal worn-out fur combine, carries out six passageway cards (or colloidal gold card) formation of image, can detect the color value of a plurality of passageways, realizes multichannel while ration and qualitative.

The food short-term test appearance that this embodiment provided, black aluminum alloy shell can stop external light to the influence of instrument operation completely, and the instrument button adopts the touch button, can prolong the life of part greatly.

Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention, and the scope of the present invention is defined by the appended claims.

Claims (10)

1. A food rapid detection system, comprising:

the card module comprises at least one card, and each card is provided with a plurality of detection channels;

the turntable mechanism comprises a positioning turntable, and the positioning turntable is used for bearing the card and driving the card to rotate;

the signal acquisition module is used for acquiring a detection result generated in the detection channel in the card;

the feedback signal module is used for feeding back a signal whether the card is put in and feeding back a positioning signal of the card;

the display module is used for displaying the detection result;

the motor is used for driving the positioning rotary disc to rotate;

the motor control module is used for controlling the motor to rotate;

the control module is used for receiving signals of the signal acquisition module, the feedback signal module and the motor control module and sending control signals to the signal acquisition module, the feedback signal module, the motor control module and the display module;

the signal acquisition module comprises signal acquisition sensors and constant-current light sources, and the number of the signal acquisition sensors is more than two.

2. The rapid food detection system of claim 1, wherein there are six of said cards, each of said cards having six of said detection channels thereon; the signal acquisition sensor is an image collector, and the signal acquisition module comprises three image collectors; and each signal acquisition sensor acquires image signals of two detection channels in the same card.

3. The system for rapidly detecting food according to claim 1, wherein the feedback signal module comprises an optocoupler reflector tube circuit and a voltage comparator.

4. The rapid food detection system of claim 1, further comprising:

the charging module is used for supplying power to the system;

and the key module is used for inputting a control instruction to the control module.

5. A fast food detector is characterized by comprising:

cards, each of the cards having a plurality of detection channels;

the positioning rotary disc is arranged below the card and is provided with an in-situ positioning hole;

the motor is arranged below the positioning turntable and used for driving the positioning turntable and the card to rotate;

the image acquisition module is used for acquiring the image of the detection channel in the card;

the feedback module is used for feeding back a signal whether the card is put in and a positioning signal of the card;

the display module is used for displaying the detection result;

the microcontroller is used for processing the detection data and controlling the detection operation;

and an upper case and a lower case.

6. The rapid food product detector of claim 5, wherein one of the cards includes six of the detection channels; the image acquisition module comprises three cameras, and each camera is used for the same image acquisition of two adjacent detection channels on the card.

7. The rapid food testing machine according to claim 6, wherein the positioning turntable has a fixing hole in the middle, and six slots are provided around the fixing hole, and the slots are used for receiving the card.

8. The rapid food inspection apparatus according to claim 7, wherein the image capturing module includes a constant current light source, and the constant current light source is two light equalizing plates.

9. The rapid food detector according to claim 5, further comprising two slide rails and a slide block engaged with the slide rails, wherein the motor is mounted on the slide block; the motor is provided with a motor fixing seat, and the positioning rotary disc is arranged on the motor fixing seat; the lower shell is provided with a bin door and a door cover, and the sliding block, the motor fixing seat and the positioning rotary disc can be pulled out and pushed out of the bin door.

10. The rapid food inspection apparatus according to claim 5, wherein the upper housing is made of black aluminum alloy; the motor is a stepping motor.

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