CN111766350A - Food detection device and system controlled by digital circuit - Google Patents
Food detection device and system controlled by digital circuit Download PDFInfo
- Publication number
- CN111766350A CN111766350A CN202010605459.XA CN202010605459A CN111766350A CN 111766350 A CN111766350 A CN 111766350A CN 202010605459 A CN202010605459 A CN 202010605459A CN 111766350 A CN111766350 A CN 111766350A
- Authority
- CN
- China
- Prior art keywords
- chamber
- field effect
- detection
- chloroform
- digital circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/02—Food
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M21/00—Bioreactors or fermenters specially adapted for specific uses
- C12M21/04—Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
- C12M41/48—Automatic or computerized control
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/06—Preparation
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/06—Preparation
- G01N2030/067—Preparation by reaction, e.g. derivatising the sample
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Biochemistry (AREA)
- Zoology (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Wood Science & Technology (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Organic Chemistry (AREA)
- Immunology (AREA)
- Genetics & Genomics (AREA)
- Pathology (AREA)
- Biomedical Technology (AREA)
- General Engineering & Computer Science (AREA)
- Sustainable Development (AREA)
- Microbiology (AREA)
- Biotechnology (AREA)
- Molecular Biology (AREA)
- Food Science & Technology (AREA)
- Medicinal Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Computer Hardware Design (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Automation & Control Theory (AREA)
- Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses a food detection device controlled by a digital circuit, which comprises a control system, a detection chamber, a nitrogen gas pump, an air pump connected with a reaction chamber, the reaction chamber arranged below the detection chamber, a sieve plate arranged between the detection chamber and the reaction chamber, a detection chamber for detecting the content of phosphine gas and an alarm; the food detection system controlled by the digital circuit is also disclosed, the device is controlled by the digital circuit system, the technical problems of complex and professional manual operation and inconvenience during food detection in the prior art are solved, and automatic detection and extraction-free detection are realized.
Description
Technical Field
The invention relates to the field of digital circuit control, in particular to a food detection device and system controlled by a digital circuit.
Background
Food safety is becoming more and more important in today's society, and food safety is also of great importance to many families today. The surface of food, especially agricultural and sideline products, sometimes has pesticide residue, which seriously harms the health. Most of the pesticides remaining in food are organic phosphide-containing pesticides. In an anaerobic environment, some microorganisms convert organic phosphorus into phosphine gas, and the microorganisms are collectively called anaerobic phosphorus-producing bacteria. However, the mechanism of hydrogen phosphide production by anaerobic phosphorus-producing bacteria is not particularly clear at the present stage, and the conversion rate of the anaerobic phosphorus-producing bacteria to organic phosphide cannot be ensured, and except that most of the organic phosphide is converted into phosphine gas, a small part of the organic phosphide is converted into inorganic phosphate.
Inorganic phosphate can also be converted into phosphine by microorganisms, collectively referred to as anaerobic electrogenic bacteria, which react endothermically, without spontaneous progression, and can be carried out by a biological electrolytic cell. By passing a current through the anode and the cathode of the cell, an oxidation reaction takes place at the anode of the cell: 1/6C6H12O6+H2O→CO2+4H++4e-The reduction reaction takes place at the cathode of the cell: 11e-+11H++H2PO4 -→4H2O+PH3. The reaction for converting inorganic phosphate into phosphine has been studied more thoroughly, and the conversion efficiency is very high. The content of the phosphorus-containing pesticide can be indirectly detected by detecting the content of the phosphine gas.
In the prior art, the detection of the residual organophosphorus pesticide is usually carried out in a laboratory by professional personnel, and the organophosphorus pesticide is extracted and then detected. The detection method needs professional knowledge and technology, most common family members are chemical zero-base personnel, and the pesticide residue detection can be rarely completed by utilizing the prior art.
Therefore, there is a need for improvement of the prior art to solve the above technical problems.
Disclosure of Invention
In view of the above, an object of the present invention is to provide a food detection device and system controlled by a digital circuit, which solve the technical problems of complicated manual operation and inconvenience during food inspection in the prior art. The method is realized by the following technical scheme:
the embodiment of the invention provides a food detection device controlled by a digital circuit, which comprises a control system, a detection chamber, a nitrogen gas inflator pump, an air extractor connected with the reaction chamber, the reaction chamber arranged below the detection chamber, a sieve plate arranged between the detection chamber and the reaction chamber, a detection chamber used for detecting the content of phosphine gas and an alarm, wherein the detection chamber and the reaction chamber can be made of metal materials and have better sealing performance;
the detection chamber is internally provided with a chloroform sprayer, an air inlet hole connected with a nitrogen inflator, an exhaust hole connected with an air pump and a door, the air inlet hole, the exhaust hole and the exhaust hole are all provided with one-way valves, the nitrogen inflator fills nitrogen into the detection chamber through the air inlet hole, the exhaust hole can exhaust the air originally in the detection chamber, the air inlet hole is arranged at the top of the detection chamber because the molecular weight of the nitrogen is slightly smaller than the molecular weight of the air, the exhaust hole is arranged at the lower part of the side wall of the detection chamber until the detection chamber is completely filled with the nitrogen to create an anaerobic environment, the one-way valve control gas on the air inlet hole can only enter the detection chamber from the nitrogen inflator, the one-way valve control gas on the exhaust hole can only flow out of the; chloroform can dissolve organic matters, and if residual pesticides exist on the surface of an article to be detected, chloroform can dissolve the pesticides;
the reaction chamber is internally provided with a bacteria box, an electrolytic cell anode chamber, anolyte arranged in the electrolytic cell anode chamber, an electrolytic cell cathode chamber, catholyte arranged in the electrolytic cell cathode chamber, an ion exchange membrane arranged between the electrolytic cell anode chamber and the electrolytic cell cathode chamber and an electric device, the bacteria box is arranged in the cathode chamber, anaerobic phosphorus-producing bacteria and anaerobic electricity-producing bacteria are arranged in the bacteria box, the anaerobic phosphorus-producing bacteria are used for converting organic phosphorus into phosphine gas and inorganic phosphate, organic pesticides dissolved in chloroform can be converted into the phosphine gas and the inorganic phosphate under the anaerobic condition, partial carbon dioxide and water can be generated, the anaerobic electricity-producing bacteria are used for converting the inorganic phosphate into the phosphine gas when the electric device is started, round carbon felts can be arranged in the electrolytic cell anode chamber and the electrolytic cell cathode chamber as motors, and the anolyte and the catholyte can contain glucose, after the anode chamber and the cathode chamber of the electrolytic cell are electrified, glucose is converted into water, carbon dioxide, electrons and hydrogen ions in the anode chamber of the electrolytic cell, phosphate is converted into phosphine gas in the cathode chamber of the electrolytic cell under the action of anaerobic electrogenic bacteria, and the power device is used for electrifying the anode chamber and the cathode chamber of the electrolytic cell;
the sieve plate is provided with sieve pores, the sieve pores can be provided with valves, when chloroform is sprayed by the chloroform sprayer, the valves are opened, chloroform can enter the reaction chamber from the detection chamber, when the air extractor for generating phosphine gas in the reaction chamber is started, the valves are opened, and the phosphine gas can enter the inspection chamber from the reaction chamber;
the inspection chamber comprises an inspector for detecting the content of phosphine, an alarm gives an alarm when the content of phosphine gas reaches n micrograms, a phosphine gas detector, a gas chromatography and the like can be adopted for detecting the content of phosphine gas, the weight of food put into the inspection chamber is generally 1kg-2kg because the pesticide residue on the surface of food is relatively strict, and the alarm needs to give an alarm when the detected pesticide content reaches 20 micrograms to prompt a user that the food is inedible when the pesticide residue is excessive;
the control system is used for controlling the nitrogen inflator pump, the chloroform sprayer, the electric device and the air pump to be sequentially started when a detection object is placed on the sieve plate and the door is opened and closed, and is also used for controlling the opening and closing of the valve, and the control system can adopt an electric system controlled by a digital circuit.
Further, be provided with the breather pipe in the laboratory, the water box of being connected with the breather pipe and the acid-base meter of setting in the water box, be provided with the distilled water in the water box, the breather pipe is used for leading to the box of water with the gas that the air extractor took out, the breather pipe sets up the below at the water box, the breather pipe can set up a plurality of holes with the junction of water box, gas fully contacts with the water in the water box after getting into the water box from the breather pipe, the acid-base meter is used for monitoring the pH valve of water-logging water, the hydrogen phosphide is slightly soluble in water, the water solution of hydrogen phosphide shows weak alkaline, because this device requires below 20 micrograms to the residual hydrogen phosphide content of pesticide, the content is very low, the basicity after dissolving in water is also less, the volume of control water box normal water, when the acid-base meter can detect water just, can control the siren and send out the police.
Furthermore, the food detection device controlled by the digital circuit also comprises a filter arranged between the air pump and the vent pipe, NaOH solid is arranged in the filter, and substances generated in the reaction chamber, except phosphine, also comprise carbon dioxide and the like.
Further, the food detection device of digital circuit control still includes the clarifier of being connected with the exhaust hole, is provided with excessive copper sulfate solution in the clarifier, and under the normal condition, the water yield in the control water box is enough to make most phosphine all dissolve in aqueous, but because phosphine has the hypertoxic, if the phosphorus-containing pesticide that contains on the food surface is too much, the phosphine of formation is too much, directly discharges the phosphine and can cause the accident, need absorb the phosphine with the clarifier, the phosphine gas takes place following chemical reaction in the clarifier:
4CuSO4+PH3+4H2O＝4Cu+H3PO4+4H2SO4。
in a second aspect of the embodiments of the present invention, there is provided a digital circuit controlled food inspection system, comprising the apparatus of claim 1, further comprising a voltage source, a pressure switch disposed on the sieve plate, a field effect transistor I connected to the voltage source, a nitrogen inflator pump connected in series with the field effect transistor I, a timing switch connected in series with the nitrogen inflator pump, a pressure-bearing resistor I connected in series with the nitrogen inflator pump, a field effect transistor II connected in parallel with the pressure-bearing resistor, a chloroform sprayer connected in series with the field effect transistor II, a counter switch connected with the chloroform sprayer, a field effect transistor III connected with the counter switch, a thermistor connected with the field effect transistor III, a pressure-bearing resistor II connected in series with the thermistor, a field effect transistor IV connected in parallel with the pressure-bearing resistor II, an electrolytic cell and a master switch connected in series with the field effect transistor, the field effect transistor II, the field effect transistor III, and the field effect transistor IV all employ NPN-type MOS transistors, when the voltage is larger than a certain value, the drain electrode and the source electrode are conducted;
the pressure switch is used for closing when the sieve plate detects downward pressure, namely, the pressure switch starts to charge nitrogen into the detection chamber when an object to be detected is placed on the sieve plate, the pressure switch can be arranged between a field effect tube grid and a power supply, the field effect tube I is conducted, the nitrogen gas charging pump is started, and the timing switch is electrified; the timing switch is used for closing the timing switch after the power-on time t1, the value of the time t1 is determined according to the volume of the interior of the detection chamber, after the time t1, the detection chamber and the reaction chamber are filled with nitrogen and have no oxygen, the detection chamber and the reaction chamber are in an oxygen-free environment, then the timing switch is closed, the nitrogen inflator pump is closed, the field effect tube II is conducted, the chloroform sprayer is opened, and the counting switch is powered on; the counting switch is used for controlling the chloroform sprayer to be disconnected after the chloroform sprayer works for t2, the time t2 can be set to 3 minutes, namely, the chloroform to be sprayed for 3 minutes to the object to be detected in the detection chamber, the chloroform sprayer can be arranged around the inner part of the detection chamber and sprays to the object to be detected in all directions, so that the pesticide on the surface of the object is completely dissolved in the chloroform and then enters the reaction chamber, the field effect tube III is conducted, and the thermistor is electrified; the thermistor is electrified and then generates heat, the resistance is reduced, in the process of electrifying and heating the thermistor, when the resistance value is greater than R, the reaction that the anaerobic phosphorus-producing bacteria convert organic phosphorus pesticides into inorganic phosphate and phosphine mainly occurs in the bacteria box, the bacteria box can also be heated to 25-35 ℃ by using the heat generated by the thermistor, so that the reaction in the bacteria box is faster, when the resistance value of the thermistor is less than R, the field effect tube IV is conducted, the electrolytic cell works, and the reaction that the anaerobic phosphorus-producing bacteria convert phosphate into phosphine gas mainly occurs in the bacteria box.
Further, the food detection system controlled by the digital circuit further comprises a field effect tube V connected with the electrolytic cell in parallel and a loudspeaker connected with the field effect tube V in parallel, the field effect tube V is used for conducting when the resistance value of the thermistor is smaller than R, the field effect tube V is conducted, the loudspeaker works, R is larger than R, the thermistor is continuously heated in the conducting process, the resistance value is continuously reduced along with the passage of time, namely after the electrolytic cell works for a period of time, anaerobic electrogenesis bacteria completely convert phosphate into phosphine gas, the resistance value of the thermistor is just smaller than R at the moment, the loudspeaker works to remind a user that a main switch can be closed, the process in the reaction chamber is finished, and electric energy waste is avoided.
Furthermore, the chloroform sprayer adopts intermittent spraying, the spraying is stopped after a period of time, the chloroform is sprayed after entering the reaction chamber, the intermittent spraying saves chloroform, and the chloroform is cleaned more thoroughly for the object to be detected.
Furthermore, the thermistor adopts an NTC type resistor, the resistance value of the NTC type resistor continuously decreases along with the time lapse, a jump type reduction process is not generated, the resistance value can be easily predicted after the thermistor is electrified for a period of time, and the control is convenient.
Further, the volume inside the detection chamber is set to Vm3The inflation speed of the nitrogen inflator is set to Am3The value of t1 is set to t1 ═ V/a × (2) min, i.e. the volume of nitrogen gas introduced is 2 times the internal volume of the detection chamber, which is enough to completely exclude oxygen from the detection chamber, the volume of gas in the reaction chamber is small, an oxygen-free environment is required, and no oxygen is present in the reaction chamber after the oxygen in the detection chamber is completely exhausted.
The positive and beneficial technical effects of the invention comprise: the microorganism is controlled by a digital circuit to decompose the organophosphorus pesticide to generate phosphine, and then the phosphine is detected, so that the detection mode is advanced, and the detection can be completed without professional chemical knowledge; the user only needs to put the food with detection into the detection chamber to close and open the door, the detection process is fully automatically controlled, and the intelligent and convenient food detection device is intelligent and convenient and is suitable for people without chemical bases to operate; the pesticide is directly decomposed by microorganisms without extraction, the operation is convenient, and the detection can be finished without excessive experimental experience; through the control of a digital circuit, the signal is not easily influenced by the external environment; other advantageous effects of the present invention will be further described with reference to the following specific examples.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a perspective view provided in embodiment 1 of the present invention;
fig. 2 is a front view provided in embodiment 1 of the present invention;
fig. 3 is a circuit diagram according to embodiment 2 of the present invention;
icon:
1-a pressure switch; 2-field effect transistor I; 3-bearing resistance I; 4-field effect transistor II; 5-field effect transistor III; 6-a thermistor; 7-bearing resistance II; 8-field effect transistor IV; 9-main switch; 10-field effect transistor V; 11-protective resistance; 12-a detection chamber; 13-nitrogen gas pump; 14-an anode chamber of the electrolytic cell; 15-sieve plate; 16-a test chamber; 17-an alarm; 18-chloroform spargers; 19-an air intake; 20-air vent; 21-air extraction holes; 22-opening the door; 23-a mushroom box; 24-cell cathode chamber; 25-ion exchange membranes; 26-mesh.
Detailed Description
Example 1: a kind of food checkout gear and system that the digital circuit controls, as shown in figure 1-2, including control system, detection chamber 12, nitrogen gas inflator pump 13, air extractor connected with reaction chamber, set up in detection chamber 12 reaction chamber under, set up in detection chamber 12 sieve 15, used for detecting the checkout room 16 and alarm 17 of the hydrogen phosphide gas content between reaction chambers, said detection chamber 12 and reaction chamber can adopt the metal material, the leakproofness is better;
the detection chamber 12 is internally provided with a chloroform sprayer 18, an air inlet 19 connected with the nitrogen inflator 13, an air outlet 20, an air exhaust hole 21 connected with an air exhauster and a door 22, the air inlet 19, the air outlet 20 and the air exhaust hole 21 are all provided with a one-way valve, the nitrogen inflator 13 charges nitrogen into the detection chamber 12 through the air inlet 19, the air outlet 20 can exhaust the air originally in the detection chamber 12, because the molecular weight of the nitrogen is slightly less than that of the air, the air inlet 19 is arranged at the top of the detection chamber 12, the air outlet 20 is arranged at the lower part of the side wall of the detection chamber 12 until the detection chamber 12 is fully filled with the nitrogen, the anaerobic environment is produced in the detection chamber 12 and the reaction chamber, the check valve control gas on the air inlet 19 can only enter the detection chamber 12 from the nitrogen inflator pump 13, the check valve control gas on the air outlet 20 can only flow out of the detection chamber 12, and the check valve control gas on the air outlet 21 can only enter the inspection chamber 16 from the detection chamber 12; chloroform can dissolve organic matters, if pesticide residues exist on the surface of an article to be detected, chloroform can dissolve the pesticide, and then the pesticide enters the reaction chamber along with the chloroform;
the reaction chamber is internally provided with a bacteria box 23, an electrolytic cell anode chamber 14, anolyte arranged in the electrolytic cell anode chamber 14, an electrolytic cell cathode chamber 24, catholyte arranged in the electrolytic cell cathode chamber 24, an ion exchange membrane 25 arranged between the electrolytic cell anode chamber 14 and the electrolytic cell cathode chamber 24 and an electric device, the bacteria box 23 is arranged in the cathode chamber, anaerobic phosphorus-producing bacteria and anaerobic electricity-producing bacteria are arranged in the bacteria box 23, pesticides dissolved by chloroform can flow into the electrolytic cell anode chamber 14 and the electrolytic cell cathode chamber 24 in the reaction chamber, or can only flow into the electrolytic cell cathode chamber 24, the anaerobic phosphorus-producing bacteria are used for converting organic pesticides dissolved in chloroform into phosphine gas and inorganic phosphate, can convert organic pesticides dissolved in chloroform into phosphine gas and inorganic phosphate under anaerobic condition, and can also generate a part of carbon dioxide and moisture, the anaerobic electricity-producing bacteria are used for converting inorganic phosphate into phosphine gas when the electric device is started, circular carbon felts can be arranged in the anode chamber 14 and the cathode chamber 24 of the electrolytic cell as electrodes, the anolyte and the catholyte can contain glucose, after the anode chamber 14 and the cathode chamber 24 of the electrolytic cell are electrified, the reaction of converting the glucose into water, carbon dioxide, electrons and hydrogen ions occurs in the anode chamber 14 of the electrolytic cell, the cathode chamber 24 of the electrolytic cell converts phosphate into phosphine gas under the action of anaerobic electrogenic bacteria, and the electric device is used for electrifying the anode chamber 14 and the cathode chamber 24 of the electrolytic cell;
the sieve plate 15 is provided with sieve pores 26, the sieve pores 26 can be provided with valves, when the chloroform sprayer 18 sprays chloroform, the valves are opened, the chloroform can enter the reaction chamber from the detection chamber 12, when the air extractor for generating phosphine gas in the reaction chamber is started, the valves are opened, and the phosphine gas can enter the inspection chamber 16 from the reaction chamber;
the inspection chamber 16 comprises an inspector for detecting the content of phosphine, the alarm 17 gives an alarm when the content of phosphine gas reaches n micrograms, a phosphine gas detector, a gas chromatography and the like can be adopted for detecting the content of phosphine gas, the weight of food put into the inspection chamber 12 is generally 1kg-2kg because the pesticide residue on the surface of food is strict, and the alarm 17 needs to give an alarm when the detected pesticide content reaches 20 micrograms to prompt a user that the food is inedible when the pesticide residue is excessive;
the control system is used for controlling the nitrogen inflator pump 13, the chloroform sprayer 18, the electric device and the air pump to be sequentially started when the detection object is placed on the sieve plate 15 and the door 22 is closed, and the control system is also used for controlling the opening and closing of the valve and can adopt an electric system controlled by a digital circuit.
In this embodiment, the inspection chamber 16 is provided with a vent pipe, a water box connected with the vent pipe, and an acid-base meter arranged in the water box, the water box is provided with distilled water, the vent pipe is used for leading gas pumped by the air pump into the water box, the vent pipe is arranged below the water box, a plurality of holes can be arranged at the joint of the vent pipe and the water box, the gas is fully contacted with water in the water box through the holes at the bottom of the water box after entering the water box from the vent pipe, the acid-base meter is used for monitoring the pH value of the water in the water box, the phosphine is slightly soluble in water, the aqueous solution of the phosphine shows alkalescence, because the device requires less than 20 micrograms of the phosphine content of pesticide residue, the content is very low, if the water quantity is enough, the generated phosphine gas can be basically completely dissolved in water, the alkalinity after dissolving in water is slightly soluble, the amount of the water in the water box is weakly controlled, so that when the acid-base meter, the alarm can be controlled to give an alarm.
In this embodiment, the food detection device controlled by the digital circuit further comprises a filter arranged between the air extractor and the vent pipe, wherein a NaOH solid is arranged in the filter, and the NaOH solid can also be placed in the filter, because substances generated in the reaction chamber, such as phosphine and carbon dioxide, are introduced into the water box along with the phosphine gas, the ph value of water in the water box can be influenced, the carbon dioxide is removed in advance, and the detection precision is improved.
In this embodiment, the food detection device controlled by the digital circuit further includes a purifier connected to the exhaust hole 20, an excessive copper sulfate solution is provided in the purifier, and in general, the amount of water in the water box is controlled to be enough to dissolve most of phosphine in water, but since phosphine is extremely toxic, if the phosphorus-containing pesticide on the surface of the food is too much, the generated phosphine is too much, and the phosphine is directly discharged to cause an accident, and the purifier needs to be used to absorb the phosphine, and the phosphine gas undergoes the following chemical reaction in the purifier:
4CuSO4+PH3+4H2O＝4Cu+H3PO4+4H2SO4。
example 2: there is provided a digital circuit controlled food inspection system, as shown in fig. 3, comprising the apparatus of claim 1, further comprising a voltage source, a pressure switch 1 provided on the sieve plate 15, a field effect transistor I2 connected to the voltage source, a nitrogen inflator 13 connected in series to the field effect transistor I2, a timing switch connected in series to the nitrogen inflator 13, a pressure-bearing resistor I3 connected in series to the nitrogen inflator 13, a field effect transistor II4 connected in parallel to the pressure-bearing resistor, a chloroform sprayer 18 connected in series to the field effect transistor II4, a counter switch connected to the chloroform sprayer 18, a field effect transistor III5 connected to the counter switch, a thermistor 6 connected to the field effect transistor III5, a pressure-bearing resistor II7 connected in series to the thermistor 6, a field effect transistor IV8 connected in parallel to the pressure-bearing resistor II7, an electrolytic cell and a main switch 9 connected in series to the field effect transistor, a field effect transistor I2, a field effect transistor II4, a field effect transistor III5, a, The field effect transistors IV8 all adopt NPN type MOS transistors, when the voltage is larger than a certain value, the drain electrode and the source electrode are conducted, and a plurality of protection resistors 11 can be arranged in the circuit;
the pressure switch 1 is used for closing the pressure switch 1 when the sieve plate 15 detects downward pressure, namely, the pressure switch 1 starts to charge nitrogen into the detection chamber 12 when an object to be detected is placed on the sieve plate 15, the pressure switch 1 can be arranged between a grid electrode of a field effect tube and a power supply, the field effect tube I2 is conducted, the nitrogen gas inflator 13 is started, and the timing switch is electrified; the timing switch is used for closing the timing switch after the power-on time t1, the value of the time t1 is determined according to the volume inside the detection chamber 12, after the time t1, the detection chamber 12 and the reaction chamber are filled with nitrogen and do not have oxygen, the detection chamber 12 and the reaction chamber are in an oxygen-free environment, then the timing switch is closed, the nitrogen inflator pump 13 is closed, the voltage of the grid electrode of the field-effect tube II4 is increased, the source electrode and the drain electrode are conducted, the chloroform sprayer 18 is opened, and the counting switch is powered on; the counting switch is used for controlling the chloroform sprayer 18 to be switched off after the chloroform sprayer 18 works for t2, the time t2 can be set to 30 minutes, namely chloroform is sprayed for 30 minutes on an object to be detected in the detection chamber 12, the chloroform sprayer 18 can be arranged on the periphery in the detection chamber 12 and sprays on the object to be detected in all directions, so that pesticides on the surface of the object are completely dissolved in the chloroform and enter the reaction chamber, the chloroform sprayer 18 is required to spray fully due to the fact that the content of phosphorus-containing pesticides left on the surface of common food is small, then the source drain of the field effect tube III5 is conducted, and the thermistor 6 is powered on; the thermistor 6 is electrified to generate heat, the resistance is reduced, in the process of electrifying and generating heat of the thermistor 6, when the resistance value is greater than R, the reaction that the anaerobic phosphorus-producing bacteria convert organic phosphorus pesticides into inorganic phosphate and phosphine is mainly generated in the bacteria box 23, the bacteria box 23 can also be heated to 25-35 ℃ by using the heat generated by the thermistor 6, so that the reaction in the bacteria box 23 is faster, when the resistance value of the thermistor 6 is less than or equal to R, the field effect tube IV8 is conducted, the electrolytic cell works, and the reaction that the anaerobic phosphorus-producing bacteria convert phosphate into phosphine gas is mainly generated in the bacteria box 23.
In this embodiment, the food detection system controlled by the digital circuit further comprises a field effect transistor V10 connected in parallel with the electrolytic cell and a loudspeaker connected in parallel with the field effect transistor V10, the field effect transistor V10 is used for conducting the drain electrode of the source electrode of the field effect transistor V10 and working the loudspeaker when the resistance value of the thermistor 6 is smaller than R, R is larger than R, the thermistor 6 is continuously heated in the conducting process, the resistance value is continuously reduced along with the time, after the electrolytic cell works for a period of time, the anaerobic electrogenesis bacteria convert all phosphate into phosphine gas, the resistance value of the thermistor 6 is just smaller than R, the loudspeaker works to remind a user that the main switch 9 can be closed, the process in the reaction chamber is finished, electric energy waste is avoided, the thermistor 6 can be set to be required for 5 hours from electrifying to heating until the resistance is R, and the time required for heating from the resistance to heating until the resistance is R can be set to be 3 hours.
In this embodiment, the chloroform spraying device 18 adopts intermittent spraying, and the spraying is stopped after a period of time, and the chloroform to be sprayed enters the reaction chamber and then is sprayed, so that the intermittent spraying saves chloroform, and the chloroform is more thoroughly cleaned of the object to be detected.
In this embodiment, the thermistor 6 is an NTC resistor, the resistance value of the NTC resistor continuously decreases with the passage of time, there is no jump-type decreasing process, the resistance value is easily predicted after being powered on for a period of time, and the control is convenient.
In this embodiment, the volume inside the detection chamber 12 is set to Vm3The inflation speed of the nitrogen inflator 13 is set to Am3The value of t1 is set to t1 ═ V/a × 2 min, i.e. the volume of nitrogen gas introduced is 2 times the internal volume of the detection chamber 12, which is enough to completely exclude oxygen in the detection chamber 12, the volume of gas in the reaction chamber is small, an oxygen-free environment is required, and no oxygen is present in the reaction chamber after the oxygen in the detection chamber 12 is completely exhausted.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (9)
1. A digital circuit controlled food detection device, characterized in that: the device comprises a control system, a detection chamber, a nitrogen gas inflator pump, an air extractor connected with the reaction chamber, the reaction chamber arranged below the detection chamber, a sieve plate arranged between the detection chamber and the reaction chamber, a detection chamber used for detecting the content of phosphine gas and an alarm;
the detection chamber is internally provided with a chloroform sprayer, an air inlet hole and an air outlet hole which are connected with a nitrogen inflator pump, an air exhaust hole which is connected with an air extractor and a door, and the air inlet hole, the air exhaust hole and the air exhaust hole are all provided with one-way valves;
the device comprises a reaction chamber, a bacteria box, an electrolytic cell anode chamber, anolyte arranged in the electrolytic cell anode chamber, an electrolytic cell cathode chamber, catholyte arranged in the electrolytic cell cathode chamber, an ion exchange membrane arranged between the electrolytic cell anode chamber and the electrolytic cell cathode chamber and an electric device, wherein the bacteria box is arranged in the cathode chamber;
sieve pores are arranged on the sieve plate;
the inspection chamber comprises an inspector for detecting the content of phosphine, and an alarm gives an alarm when the content of phosphine gas reaches n micrograms;
the control system is used for controlling the nitrogen inflator pump, the chloroform sprayer, the electric device and the air pump to be sequentially started when the detection object is placed on the sieve plate and the door is opened and closed.
2. The digital circuit controlled food product inspection device of claim 1, wherein: the inspection chamber is internally provided with a vent pipe, a water box connected with the vent pipe and an acid-base meter arranged in the water box, wherein water is arranged in the water box, the vent pipe is used for leading gas pumped by the air pump into the water box, and the acid-base meter is used for monitoring the pH value of the water in the water box.
3. The digital circuit controlled food product inspection device of claim 2, wherein: the filter is arranged between the air extractor and the vent pipe, and NaOH solid is arranged in the filter.
4. The digital circuit controlled food product inspection device of claim 3, wherein: also comprises a purifier connected with the exhaust hole, and excessive copper sulfate solution is arranged in the purifier.
5. A food detection system controlled by a digital circuit, which comprises the device of claim 1, and is characterized by further comprising a voltage source, a pressure switch arranged on the sieve plate, a field effect tube I connected with the voltage source, a timing switch connected with the nitrogen inflator pump in series, a pressure bearing resistor I connected with the nitrogen inflator pump in series, a field effect tube II connected with the pressure bearing resistor in parallel, a counting switch connected with a chloroform sprayer, a field effect tube III connected with the counting switch, a thermistor connected with the field effect tube III, a pressure bearing resistor II connected with the thermistor in series, a field effect tube IV connected with the pressure bearing resistor II in parallel, an electrolytic cell connected with the field effect tube in series and a main switch, wherein the field effect tube I is connected with the nitrogen inflator pump in series, and the field effect tube II is connected with the chloroform sprayer in series;
the pressure switch is used for being closed when the sieve plate detects downward pressure, the field effect tube I is conducted, the nitrogen gas inflator pump is started, and the timing switch is electrified; the timing switch is used for closing the timing switch, closing the nitrogen inflator pump, conducting the field effect tube II, starting the chloroform sprayer and electrifying the counting switch after the electrifying time t 1; the counting switch is used for controlling the chloroform sprinkler to be disconnected after the chloroform sprinkler works for t2, the field effect tube III is conducted, and the thermistor is electrified; the thermistor heats after being electrified, and the resistance is reduced; and the field effect tube IV is used for conducting the field effect tube IV and enabling the electrolytic cell to work when the resistance value of the thermistor is smaller than R.
6. The digital circuit controlled food detection system of claim 5, wherein: the field effect transistor V is connected with the electrolytic cell in parallel, and the loudspeaker is connected with the field effect transistor V in parallel.
7. The digital circuit controlled food detection system of claim 6, wherein: the chloroform sprayer adopts intermittent spraying.
8. The digital circuit controlled food detection system of claim 7, wherein: the thermistor adopts an NTC type resistor.
9. The digital circuit controlled food detection system of claim 8, wherein: the volume inside the detection chamber is set to Vm3The inflation speed of the nitrogen inflator is set to Am3The value of/min, t1 is set to t1 ═ (V/a × 2) min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010605459.XA CN111766350B (en) | 2020-06-29 | 2020-06-29 | Food detection device and system controlled by digital circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010605459.XA CN111766350B (en) | 2020-06-29 | 2020-06-29 | Food detection device and system controlled by digital circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111766350A true CN111766350A (en) | 2020-10-13 |
| CN111766350B CN111766350B (en) | 2022-10-25 |
Family
ID=72723682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010605459.XA Active CN111766350B (en) | 2020-06-29 | 2020-06-29 | Food detection device and system controlled by digital circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111766350B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112731908A (en) * | 2021-01-04 | 2021-04-30 | 潍柴动力股份有限公司 | Device and method for controlling sample piece to be powered on and powered off |
| CN113624924A (en) * | 2021-08-26 | 2021-11-09 | 衢州市食品药品检验研究院(衢州市医疗器械质量监督检验所) | Detection device for 26 pesticide residues in royal jelly and use method |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202119761U (en) * | 2011-06-23 | 2012-01-18 | 上海出入境检验检疫局机电产品检测技术中心 | Control circuit for durability test device of adornment nickel burst size |
| CN104828939A (en) * | 2015-04-28 | 2015-08-12 | 华南理工大学 | Multi-stage phosphor removing and hydrogen phosphide production method of phosphor-containing organic wastewater |
| CN105858949A (en) * | 2016-04-06 | 2016-08-17 | 安庆市达东电子科技有限公司 | Low-temperature coagulant maintenance and inspection module of dissolved-air floatation machine |
| CN106546692A (en) * | 2016-10-25 | 2017-03-29 | 烟台大学 | A kind of method of imaging method detection organophosphorus pesticide residue and application thereof |
| CN206892047U (en) * | 2017-07-04 | 2018-01-16 | 成都新三可仪器有限公司 | A kind of device of quick detection organic matter concentration |
| CN108362843A (en) * | 2018-02-07 | 2018-08-03 | 厦门海荭兴仪器股份有限公司 | A kind of portable pesticide residue detection device |
| CN209841841U (en) * | 2019-03-21 | 2019-12-24 | 深圳市麦轩食品有限公司 | Metal detection device for food |
-
2020
- 2020-06-29 CN CN202010605459.XA patent/CN111766350B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202119761U (en) * | 2011-06-23 | 2012-01-18 | 上海出入境检验检疫局机电产品检测技术中心 | Control circuit for durability test device of adornment nickel burst size |
| CN104828939A (en) * | 2015-04-28 | 2015-08-12 | 华南理工大学 | Multi-stage phosphor removing and hydrogen phosphide production method of phosphor-containing organic wastewater |
| CN105858949A (en) * | 2016-04-06 | 2016-08-17 | 安庆市达东电子科技有限公司 | Low-temperature coagulant maintenance and inspection module of dissolved-air floatation machine |
| CN106546692A (en) * | 2016-10-25 | 2017-03-29 | 烟台大学 | A kind of method of imaging method detection organophosphorus pesticide residue and application thereof |
| CN206892047U (en) * | 2017-07-04 | 2018-01-16 | 成都新三可仪器有限公司 | A kind of device of quick detection organic matter concentration |
| CN108362843A (en) * | 2018-02-07 | 2018-08-03 | 厦门海荭兴仪器股份有限公司 | A kind of portable pesticide residue detection device |
| CN209841841U (en) * | 2019-03-21 | 2019-12-24 | 深圳市麦轩食品有限公司 | Metal detection device for food |
Non-Patent Citations (1)
| Title |
|---|
| 肖翠容等: "农药废水中总有机磷的色谱测定", 《化工环保》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112731908A (en) * | 2021-01-04 | 2021-04-30 | 潍柴动力股份有限公司 | Device and method for controlling sample piece to be powered on and powered off |
| CN112731908B (en) * | 2021-01-04 | 2021-12-21 | 潍柴动力股份有限公司 | Device and method for controlling sample piece to be powered on and powered off |
| CN113624924A (en) * | 2021-08-26 | 2021-11-09 | 衢州市食品药品检验研究院(衢州市医疗器械质量监督检验所) | Detection device for 26 pesticide residues in royal jelly and use method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111766350B (en) | 2022-10-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111766350B (en) | Food detection device and system controlled by digital circuit | |
| CN105727331B (en) | A kind of dissipation control terminal and dissipation system | |
| MXPA06009611A (en) | Gas drive electrolytic cell. | |
| JPS6320496A (en) | Automated chlorine generator | |
| CN110873373A (en) | Air conditioning device based on micro-electrolysis sterilization, control method, humidifier and cooling fan | |
| CN216639662U (en) | Disinfectant manufacturing installation | |
| CN110731448A (en) | intelligent OH water hydroxyl water catalyst food material cleaning and purifying device | |
| CN214990913U (en) | Multistage sewage treatment device | |
| CN214263158U (en) | Sterilization and deodorization system of garbage transfer station | |
| CN114150332A (en) | Disinfectant liquid manufacturing apparatus and control method thereof | |
| CN212425716U (en) | But landfill leachate deodorization system of solid-liquid separation | |
| CN114540850A (en) | Hydrogen and oxygen producing apparatus by electrolyzing water | |
| CN107905319A (en) | A kind of Novel public toilet peculiar smell refreshing device | |
| CN211302394U (en) | Kitchen garbage foul gas processing system | |
| CN210373645U (en) | Five-section type comprehensive treatment system for kitchen oil smoke | |
| CN2645458Y (en) | Water inlet base of drinking machine for ozone disinfecting | |
| CN112058057A (en) | Low-pressure electrolyzed water type mixed ozone water supply deodorization device | |
| CN219713740U (en) | Refrigerator with a refrigerator body | |
| CN206829680U (en) | A kind of ecological environment protection toilet for utilizing function from processing cycle with sewage | |
| CN209081503U (en) | Agricultural electrolysis water generator control device | |
| CN216919429U (en) | Hydrogen and oxygen producing apparatus by electrolyzing water | |
| CN221015320U (en) | Water treatment odor eliminating device | |
| CN213868238U (en) | Prefabricated pump station of ion deodorization's integration can carry out | |
| CN215593202U (en) | Water-return alarm system | |
| CN215480341U (en) | Automatic change water treatment system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |