CN114923896B - Control system of photoelectric nose and photoelectric nose - Google Patents

Abstract

The present invention provides a control system of an optoelectronic nose and an optoelectronic nose. The control system of the optoelectronic nose includes a terminal, a main control board and a photon counter. The terminal is electrically connected to the main control board, and the photon counter is electrically connected to the main control board. The terminal is used to set a first control parameter and a second control parameter. The main control board controls the photon counter according to the first control parameter. The photon counter sends measurement data to the terminal through the main control board. The main control board is also used to be electrically connected to an injection pump, a multi-channel switching valve and a gas mass flow controller in the optoelectronic nose. The main control board controls the injection pump, the multi-channel switching valve and the gas mass flow controller according to the second control parameter, and the injection pump, the multi-channel switching valve and the gas mass flow controller feed back first state information to the terminal through the main control board. The control system of the optoelectronic nose provided by the present invention solves the problem of complex operation of the optoelectronic nose in the prior art.

Description

Control system of photoelectric nose and photoelectric nose

Technical Field

The present invention relates to the technical field of respiratory gas detection, and in particular to a control system of an optoelectronic nose and an optoelectronic nose.

Background Art

Existing VOC (Volatile Organic Compounds) detection equipment in breath includes ion mobility spectrometry, gas chromatography-mass spectrometry and proton transfer reaction mass spectrometry. These detection equipment have accurate detection results, but the equipment is expensive, complex in structure and has high requirements for equipment operation. The electronic nose is an electronic system that uses the response pattern of a gas sensor array to identify odors. Currently, the widely used sensor arrays include metal oxide sensor arrays and electrochemical sensor arrays, but these sensor arrays have low detection sensitivity and cannot meet the requirements for VOC content detection in breath.

Optical sensors based on the principle of catalytic chemiluminescence have higher detection sensitivity. Photoelectronic noses based on optical sensor arrays can be used for breath VOC detection. The photoelectronic nose includes multiple optical sensors, each with a different catalytic coating, which reacts with different components in the breath to obtain reaction data. Special analytical instruments are required to collect and analyze the reaction data. The photoelectronic nose also includes devices such as syringe pumps, flow meters, and switching valves. Each device has parameters that need to be adjusted. When the parameters of one or more devices need to be changed, the operator needs to make changes in each device one by one, and the working status of each device cannot be monitored in real time.

The operation of using existing photoelectric noses to detect VOC in breath is complicated.

Summary of the invention

The invention provides a control system of an optoelectronic nose and an optoelectronic nose. The control system of the optoelectronic nose solves the problem of complicated operation of the optoelectronic nose in the prior art.

The present invention provides a control system for an optoelectronic nose, comprising a terminal, a main control board and a photon counter, wherein the terminal is electrically connected to the main control board, and the photon counter is electrically connected to the main control board;

The terminal is used to set the first control parameter and the second control parameter;

The main control board is used to obtain the first control parameter and control the photon counter according to the first control parameter;

The photon counter is used to collect the measurement data of the reaction module in the photoelectronic nose and send the measurement data to the terminal through the main control board;

The terminal is used to receive measurement data;

The main control board is also used to electrically connect with the syringe pump, multi-channel switching valve and gas mass flow controller in the photoelectronic nose;

The main control board is used to obtain the second control parameter and control the injection pump, the multi-channel switching valve and the gas mass flow controller according to the second control parameter. The injection pump, the multi-channel switching valve and the gas mass flow controller feed back the first state information to the terminal through the main control board.

In a possible implementation, in the control system of the photoelectronic nose provided by the present invention, the number of photon counters is multiple, and the photon counters are arranged in a one-to-one correspondence with the multiple reaction modules in the photoelectronic nose, and the photon counters are used to collect measurement data of the reaction modules corresponding to the photon counters;

Alternatively, it also includes a moving module, which is connected to the photon counter and is used to control the photon counter to move between the reaction modules in the photoelectron nose so that the photon counter collects measurement data of the reaction module corresponding to the photon counter.

In a possible implementation manner, in the control system of the photoelectronic nose provided by the present invention, the first control parameter includes at least one of sampling time, power on and power off;

The second control parameters include at least one of an initialization setting, an injection speed setting, an injection volume setting, and an automatic injection setting of the injection pump, the second control parameters also include at least one of a control flow setting and a measurement current flow setting of the gas mass flow controller, and the second control parameters also include at least one of a change switching speed setting and a change switching position setting of the multi-channel switching valve;

The first state information includes at least one of the injection pump state and the injection process state of the injection pump, the first state information also includes at least one of the current set flow value and the current measured flow value of the gas mass flow controller, and the first state information also includes at least one of the set switching speed and the current switching valve position of the multi-channel switching valve.

In a possible implementation, the control system of the photoelectronic nose provided by the present invention has a first interface and a second interface on a main control board, the main control board is electrically connected to the photon counter through the first interface, the second interface includes a plurality of sub-interfaces, and the injection pump, the multi-channel switching valve and the gas mass flow controller in the photoelectronic nose are electrically connected to the main control board through different sub-interfaces respectively;

The mobile module is electrically connected to the main control board via the sub-interface;

The terminal is used to set the third control parameter, the main control board is used to obtain the third control parameter and control the mobile module according to the third control parameter, and the mobile module feeds back the second state information to the terminal through the main control board.

In a possible implementation, in the control system of the photoelectric nose provided by the present invention, the third control parameter includes at least one of a set moving speed of the moving module, module zeroing, and a set moving position, and the second state information is at least one of whether the moving module is zeroed and the moving speed.

In a possible implementation, the control system of the optoelectronic nose provided by the present invention further includes a plurality of temperature control modules, and the temperature control modules are electrically connected to the sub-interfaces in a one-to-one correspondence;

The terminal is used to set the fourth control parameter and send a query instruction, the main control board is used to obtain the fourth control parameter and control the temperature control module according to the fourth control parameter, and the main control board is also used to query the working status of the temperature control module by sending a query instruction;

The reaction module is a light sensor, the temperature control module is used to be connected to the light sensor in a one-to-one correspondence, the temperature control module is used to control the working temperature of the light sensor connected to the temperature control module according to the fourth control parameter, and the temperature control module feeds back the third state information to the terminal through the main control board.

In a possible embodiment, in the control system of the photoelectronic nose provided by the present invention, the temperature control module includes a heating unit and a temperature control unit, the heating unit is used to heat the reaction module, and the temperature control unit is electrically connected to the heating unit to control the heating temperature of the heating unit.

In a possible implementation manner, in the control system of the photoelectronic nose provided by the present invention, the fourth control parameter includes at least one of a set target temperature and a set temperature control parameter of the temperature control module;

The third state information is at least one of a target temperature, a current temperature and a temperature control parameter of the temperature control module;

The query instruction includes at least one of checking the current temperature, checking the target temperature, and checking the temperature control parameters.

In a possible implementation, the control system of the photoelectronic nose provided by the present invention further includes a power switch relay, a plasma generator and a water cooling pump, wherein the plasma generator and the water cooling pump are both electrically connected to the power switch relay, the plasma generator is used to enhance the signal of the light sensor, the water cooling pump is used to cool the photon counter, and a third interface is provided on the main control board, and the main control board is electrically connected to the power switch relay through the third interface;

The terminal is used to send opening and closing instructions, and the main control board is used to control the opening and closing of the power switch relay according to the opening and closing instructions, so that when the power switch relay is turned on, the plasma generator and the water cooling pump are both turned on, and when the power switch relay is turned off, the plasma generator and the water cooling pump are both turned off.

The present invention also provides a photoelectronic nose, comprising a photoelectronic nose body and a control system of the photoelectronic nose electrically connected to the photoelectronic nose body.

The control system of the photoelectronic nose and the photoelectronic nose provided by the present invention, the control system of the photoelectronic nose sets a first control parameter and a second control parameter through a terminal, the main control board obtains the first control parameter and controls the photon counter according to the first control parameter, the main control board obtains the second control parameter and controls the injection pump, the multi-channel switching valve and the gas mass flow controller according to the second control parameter, the photon counter sends measurement data to the terminal through the main control board, the injection pump, the multi-channel switching valve and the gas mass flow controller feed back first status information to the terminal through the main control board, thereby, the photon counter, the injection pump, the multi-channel switching valve and the gas mass flow controller can be controlled by operating on the terminal, and the measurement data of the photon counter and the first status information of the injection pump, the multi-channel switching valve and the gas mass flow controller can be obtained on the terminal, thereby solving the problem of complex operation of the photoelectronic nose in the prior art.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

FIG1 is a schematic diagram of the structure of a control system of an optoelectronic nose provided in an embodiment of the present invention;

FIG2 is a schematic diagram showing the connection between the control system of the optoelectronic nose and the optoelectronic nose body provided in an embodiment of the present invention;

FIG3 is a schematic diagram of the structure of the optoelectronic nose provided in an embodiment of the present invention.

Description of reference numerals:

100- Control system of optoelectronic nose;

110-terminal;

120-main control board; 121-first interface; 122-second interface; 1221-sub-interface; 123-third interface;

130-photon counter;

140-mobile module;

150-temperature control module;

160-power switch relay;

170-Plasma generator;

180-water cooling pump;

200-photoelectronic nose body;

210-reaction module;

220-syringe pump;

230-Multi-channel switching valve;

240-Gas mass flow controller;

A-carrier gas;

B- measured gas;

C- Exhaust gas.

DETAILED DESCRIPTION

In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, or it can be an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

The terms "first", "second", "third" (if any) in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the application described herein can be implemented in an order other than those illustrated or described herein, for example.

In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or service tool that includes a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or service tool.

The VOC components in the breath of lung cancer patients are different from those of ordinary people. Lung cancer can be diagnosed by comparing the VOC components in the breath.

Existing respiratory VOC detection equipment includes ion mobility spectrometry, gas chromatography-mass spectrometry and proton transfer reaction mass spectrometry. These detection devices have accurate detection results, but the equipment is expensive, complex in structure and has high requirements for equipment operation.

The electronic nose is an electronic system that uses the response pattern of a gas sensor array to identify odors. The main mechanism by which the electronic nose identifies odors is that each sensor in the sensor array of the electronic nose has different sensitivities to the gas being measured. For example, gas No. 1 may produce a high response on a certain sensor, but a low response on other sensors. The sensor that produces a high response to gas No. 2 is not sensitive to gas No. 1. As a result, the entire sensor array has different response patterns to different component gases, and the electronic nose can identify odors based on the sensor's response pattern.

Currently, widely used sensor arrays include metal oxide sensor arrays and electrochemical sensor arrays, but these sensor arrays have low detection sensitivity. As the VOC content in the breath decreases, these sensors cannot meet the requirements for detecting the VOC content in the breath.

The optical sensor is based on the principle of catalytic chemiluminescence. Specifically, catalytic chemiluminescence is a light radiation phenomenon that accompanies a substance during a chemical reaction. Substances X and Y undergo a chemical reaction to generate substance Z. The energy released by the reaction is absorbed by the molecules of substance Z and transitions to an excited state Z*. The excited Z* generates light radiation in the process of returning to the ground state, thereby converting chemical energy into light energy. Optical sensors have higher detection sensitivity, and an optoelectronic nose based on an optical sensor array can be used to detect VOCs in breath.

The photoelectric nose includes multiple light sensors, each of which has a different catalytic coating, which reacts with different components in the breath to obtain reaction data, which requires the use of dedicated analytical instruments to collect and analyze the reaction data. The photoelectric nose also includes devices such as syringe pumps, flow meters, and switching valves. Each device has parameters that need to be adjusted. When the parameters of one or more devices need to be changed, the operator needs to change them one by one in each device, and the working status of each device cannot be monitored in real time.

The operation of using existing photoelectric noses to detect VOC in breath is complicated.

Based on this, the present invention provides a control system of a photoelectronic nose and a photoelectronic nose. The control system of the photoelectronic nose can control a photon counter, an injection pump, a multi-channel switching valve and a gas mass flow controller by operating on a terminal. The measurement data of the photon counter and the first state information of the injection pump, the multi-channel switching valve and the gas mass flow controller can be obtained on the terminal, thereby solving the problem of complex operation of the photoelectronic nose in the prior art.

FIG1 is a schematic diagram of the structure of the control system of the photoelectronic nose provided in an embodiment of the present invention; FIG2 is a schematic diagram of the connection between the control system of the photoelectronic nose provided in an embodiment of the present invention and the photoelectronic nose body; FIG3 is a schematic diagram of the structure of the photoelectronic nose provided in an embodiment of the present invention. As shown in FIG1 to FIG3, the control system 100 of the photoelectronic nose provided in the present invention includes a terminal 110, a main control board 120 and a photon counter 130, the terminal 110 is electrically connected to the main control board 120, the photon counter 130 is electrically connected to the main control board 120, the terminal 110 is used to set a first control parameter and a second control parameter, the main control board 120 is used to obtain the first control parameter and control the photon counter 130 according to the first control parameter, the photon counter 130 is used to collect the measurement data of the reaction module 210 in the photoelectronic nose, and send the measurement data to the terminal 110 through the main control board 120, and the terminal 110 is used to receive the measurement data.

The main control board 120 is also used to electrically connect to the injection pump 220, the multi-channel switching valve 230 and the gas mass flow controller 240 in the photoelectronic nose. The main control board 120 is used to obtain the second control parameter and control the injection pump 220, the multi-channel switching valve 230 and the gas mass flow controller 240 according to the second control parameter. The injection pump 220, the multi-channel switching valve 230 and the gas mass flow controller 240 feedback the first status information to the terminal 110 through the main control board 120.

The photoelectronic nose has a reaction module 210, which is used to measure the VOC components in the breath. The reaction module 210 can convert the VOC components in the breath into countable photons through catalytic chemiluminescence. The photon counter 130 is a light pulse detection device. The photon counter 130 can collect the photons generated in the reaction module 210 and convert the photons into measurement data, and send the measurement data to the main control board 120 within the specified sampling time, and send it to the terminal 110 through the main control board 120.

Specifically, the reaction module 210 first measures the VOC in the breath of a normal person, and the photon counter 130 obtains the measurement data of the normal person by collecting photons, and sends it to the terminal 110 through the main control board 120. The terminal 110 uses the measurement data of the normal person as standard data. The reaction module 210 then measures the VOC in the breath of the person who needs to be diagnosed, and the photon counter 130 obtains the measurement data of the person who needs to be diagnosed by collecting photons, and sends it to the terminal 110 through the main control board 120. The terminal 110 compares the measurement data with the standard data to provide the user with a basis for diagnosis.

In this embodiment, the terminal 110 may be an electronic device with a display screen, for example, the terminal 110 may be a computer or a mobile phone, the display screen of the computer or the mobile phone may provide a human-machine interaction interface of the optoelectronic nose, and the user may set the first control parameter through the human-machine interaction interface of the terminal 110. The terminal 110 may be electrically connected to the main control board 120 via a USB, a serial port or a local area network.

The main control board 120 may be a single chip microcomputer, and the main control board 120 obtains the first control parameter set by the terminal 110. The main control board 120 has multiple interfaces, and the main control board 120 is connected to the photon counter 130 through one or more of the interfaces, so as to control the photon counter 130 accordingly according to the first control parameter. Specifically, when it is necessary to modify the built-in parameters in the photon counter 130, the first control parameter can be set on the human-computer interaction interface of the terminal 110, and the built-in parameter modification of the photon counter 130 can be completed by sending it to the photon counter 130 through the main control board 120. There is no need to operate inside the photon counter 130.

The structures of the syringe pump 220 , the multi-channel switching valve 230 , and the gas mass flow controller 240 are described below.

The syringe pump 220 is an automated electromechanical device for injecting the measured gas B. The syringe pump 220 includes a stepper motor, a syringe chamber, a solenoid valve (the solenoid valve includes an injection solenoid valve and an injection solenoid valve), and a control circuit board. When the measured gas B is injected through the syringe pump 220, the injection solenoid valve is first opened under the action of the stepper motor to suck the gas in the sample bag into the syringe chamber, and then the injection solenoid valve is opened to inject the measured gas B into the gas path of the photoelectronic nose. The flow process of the measured gas B is completed under the control of the control circuit board.

The multi-channel switching valve 230 is an electromechanical device used for multi-channel gas circuit switching. The multi-channel switching valve 230 includes a control circuit board, a mover, an inlet and multiple outlets. The inlet of the multi-channel switching valve 230 is connected to the injection pump 220. Under the control of the control circuit board, the mover of the multi-channel switching valve 230 rotates so that the outlets are respectively connected to different reaction modules 210, thereby injecting the measured gas B into different reaction modules 210 respectively.

When injecting the measured gas B, air is also required as a carrier. The gas mass flow controller 240 is an electromechanical device for measuring and controlling the mass flow of air. The gas mass flow controller 240 includes a control circuit board and a mass flow control unit. Under the control of the control circuit board, the mass flow control unit adjusts the mass flow of air. After the air with a certain mass flow through the gas mass flow controller 240 is mixed with the measured gas B, it enters different reaction modules 210 through the multi-channel switching valve 230.

The main control board 120 controls the injection pump 220, the multi-channel switching valve 230 and the gas mass flow controller 240 respectively according to the second control parameter generated by the terminal 110. The injection pump 220, the multi-channel switching valve 230 and the gas mass flow controller 240 generate first state information according to their respective working conditions, and send it to the main control board 120 through their respective control circuit boards, and then feed it back to the terminal 110 through the main control board 120.

The control system of the photoelectric nose provided by the present invention sets a first control parameter and a second control parameter through a terminal 110, the main control board 120 obtains the first control parameter and controls the photon counter 130 according to the first control parameter, the main control board 120 obtains the second control parameter and controls the injection pump 220, the multi-channel switching valve 230 and the gas mass flow controller 240 according to the second control parameter, the photon counter 130 sends measurement data to the terminal 110 through the main control board 120, and the injection pump 220, the multi-channel switching valve 230 and the gas mass flow controller 240 feed back first state information to the terminal 110 through the main control board 120, thereby, the photon counter 130, the injection pump 220, the multi-channel switching valve 230 and the gas mass flow controller 240 can be controlled by operating on the terminal 110, and the measurement data of the photon counter 130 and the first state information of the injection pump 220, the multi-channel switching valve 230 and the gas mass flow controller 240 can be obtained on the terminal 110, thereby solving the problem of complex operation of the photoelectric nose in the prior art.

In some embodiments, in order to improve the detection efficiency of the photoelectronic nose, there are multiple photon counters 130, and the photon counters 130 are arranged in a one-to-one correspondence with the multiple reaction modules 210 in the photoelectronic nose. The photon counters 130 are used to collect photons from the reaction modules 210 corresponding to the photon counters and convert them into measurement data.

The photon counter 130 sends the obtained measurement data in the corresponding reaction module 210 to the main control board 120, and the main control board 120 analyzes and processes the data and sends it to the terminal 110. The terminal 110 can provide a diagnosis basis for the user by comparing the measurement data with the standard data.

In other embodiments, since the cost of the photon counter 130 is relatively high and the number of the photon counters 130 is less than the number of the reaction modules 210, the control system 100 of the photoelectron nose may further include a mobile module 140, which is connected to the photon counter 130. The mobile module 140 is used to control the photon counter 130 to move between the reaction modules 210 in the photoelectron nose so that the photon counter 130 collects measurement data of the reaction module 210 corresponding to the photon counter 130.

One or a few photon counters 130 can be set up, and the mobile module 140 can be provided with a clamping device, which is connected to the photon counter 130. The mobile module 140 is electrically connected to the main control board 120. Under the control of the main control board 120, the mobile module 140 moves the photon counter 130 between the reaction modules 210 to obtain measurement data.

Specifically, the photon counter 130 moves to one of the reaction modules 210 to obtain measurement data corresponding to this reaction module 210, and stores the measurement data in the main control board 120. The photon counter 130 moves to another reaction module 210 to obtain measurement data corresponding to this reaction module 210, and stores the measurement processing in the main control board 120. The moving module 140 continues to move the photon counter 130 until the measurement data collection of all the reaction modules 210 is completed. The main control board 120 analyzes and processes the measurement data and sends it to the terminal 110. The terminal 110 can provide a basis for diagnosis to the user by comparing the measurement data with the standard data.

The first control parameter is used to control the photon counter 130 , and the first control parameter includes at least one of sampling time, power on, and power off.

The sampling time, power on and power off are all built-in parameters of the photon counter 130 . By setting the first control parameter in the human-computer interaction interface of the terminal 110 , the built-in parameters of the photon counter 130 can be changed.

Specifically, according to different measured gases B, all photon counters 130 may be turned on to improve measurement efficiency, or some photon counters 130 may be turned on and some photon counters 130 may be turned off to save measurement costs. In addition, different measurement gases have different times for catalytic chemiluminescence to occur in the reaction module 210, so different sampling times of the photon counters 130 may be set according to different measurement gases, thereby achieving more accurate measurement.

Please continue to refer to Figures 1 and 2. The main control board 120 has a first interface 121 and a second interface 122. The main control board 120 is electrically connected to the photon counter 130 through the first interface 121. The second interface 122 includes a plurality of sub-interfaces 1221. The injection pump 220, the multi-channel switching valve 230 and the gas mass flow controller 240 in the photoelectronic nose are electrically connected to the main control board 120 through different sub-interfaces 1221, respectively.

Since during the working time of the photoelectronic nose, the photon counter 130 needs to regularly send measurement data to the main control board 120 within the set sampling time, in order to ensure the stability of the connection between the photon counter 130 and the main control board 120 and the timeliness of data transmission, the first interface 121 is set one-to-one with the photon counter 130, and the first interface 121 can be an RS232 interface or an RS485 interface.

The control circuit boards in the syringe pump 220 , the multi-channel switching valve 230 and the gas mass flow controller 240 are respectively connected to the sub-interfaces 1221 in a one-to-one correspondence, and are connected to the main control board 120 through the sub-interfaces 1221 .

The second interface 122 may be an RS485 interface, and the connection mode of the second interface 122 with the syringe pump 220 , the multi-channel switching valve 230 and the control circuit board in the gas mass flow controller 240 through the sub-interface 1221 is a master-slave connection mode.

Specifically, the first status information returned by the syringe pump 220 includes the syringe pump address, and the main control board 120 determines that the device sending the first status information is the syringe pump 220 according to the syringe pump address.

The first state information returned by the gas mass flow controller 240 includes the gas mass flow controller address. The main control board 120 determines that the device sending the first state information is the gas mass flow controller 240 according to the gas mass flow controller address.

The first state information returned by the multi-channel switching valve 230 includes the multi-channel switching valve address. The main control board 120 determines that the device sending the first state information is the multi-channel switching valve 230 according to the multi-channel switching valve address.

When the main control board 120 sends the second control parameter, the second control parameter address is set in the second control parameter. The second control parameter address is used to identify one of the injection pump 220, the multi-channel switching valve 230 and the gas mass flow controller 240. The control circuit boards in the injection pump 220, the multi-channel switching valve 230 and the gas mass flow controller 240 all receive the second control parameter, but only the device that matches the second control parameter address executes the second control parameter.

Therefore, the injection pump 220, the multi-channel switching valve 230 and the gas mass flow controller 240 use a master-slave connection method with the main control board 120, and through address matching, the channel mixing problem when the injection pump 220, the multi-channel switching valve 230 and the gas mass flow controller 240 communicate with the main control board 120 is avoided.

Thus, the syringe pump 220, the multi-channel switching valve 230 and the gas mass flow controller 240 can be controlled through the human-machine interface of the terminal 110, without having to set them through the respective control circuit boards of the syringe pump 220, the multi-channel switching valve 230 and the gas mass flow controller 240. In addition, the working conditions of the syringe pump 220, the multi-channel switching valve 230 and the gas mass flow controller 240 can be monitored according to the first state information through the human-machine interface of the terminal 110.

In this embodiment, the second control parameters include at least one of the initialization setting, injection speed setting, injection volume setting and automatic injection setting of the injection pump 220, the second control parameters also include at least one of the control flow setting and the measurement current flow setting of the gas mass flow controller 240, and the second control parameters also include at least one of the change switching speed setting and the change switching position setting of the multi-channel switching valve 230.

The first state information includes at least one of the injection pump state and the injection process state of the injection pump 220, the first state information also includes at least one of the current set flow value and the current measured flow value of the gas mass flow controller 240, and the first state information also includes at least one of the set switching speed and the current switching valve position of the multi-channel switching valve 230.

First, the second control parameter and the first state information related to the injection pump 220 are explained. At the beginning of each measurement, the injection pump 220 is initialized and set, and the built-in parameters of the injection pump 220 during the last measurement can be cleared so that the injection pump 220 returns to the initial working state, which is convenient for setting the parameters of this measurement. According to the different measured gases B, the injection speed and injection volume of the injection pump 220 need to be set. In addition, the injection pump 220 can also be set to automatic injection mode. These settings can be made on the human-computer interaction interface of the terminal 110. According to the injection pump status and injection process status fed back by the injection pump 220, the working status of the injection pump 220 can be monitored in real time on the human-computer interaction interface of the terminal 110.

Then, the second control parameter and the first state information related to the gas mass flow controller 240 are described. Different flow rates of the gas mass flow controller 240 can be set for different measured gases B so that the measured gas B can be adequately reacted in the reaction module 210. The flow rate of the measured gas B can also be measured to ensure that the currently set flow rate is consistent with the currently measured flow rate. The currently set flow rate and the currently measured flow rate need to be fed back to the terminal 110 through the main control board 120 as the first state information, so as to be used for timely adjustment in the human-computer interaction interface of the terminal 110.

Secondly, the second control parameter and the first state information related to the multi-channel switching valve 230 are described. The position of the multi-channel switching valve 230 can be directly changed by setting the second control parameter. In addition, different switching speeds of the multi-channel switching valve 230 can be set according to different movers in the multi-channel switching valve 230. The set switching speed and the current switching valve position of the multi-channel switching valve 230 are fed back to the terminal 110 through the main control board 120 as the first state information, so that the multi-channel switching valve 230 is monitored in real time through the human-computer interaction interface of the terminal 110.

Please continue to refer to Figures 1 and 2. The mobile module 140 is electrically connected to the main control board 120 through the sub-interface 1221; the terminal 110 is used to set the third control parameter, the main control board 120 is used to obtain the third control parameter and control the mobile module 140 according to the third control parameter, and the mobile module 140 feeds back the second status information to the terminal 110 through the main control board 120.

The control circuit board in the mobile module 140 is also electrically connected to the main control board 120 through the sub-interface 1221. The third control parameter includes a third control parameter address, which is used to identify the mobile module 140. The control circuit board in the mobile module 140 receives and executes the third control parameter.

The second status information of the mobile module 140 is also sent to the terminal 110 through the main control board 120 , so that the built-in parameters of the mobile module 140 can be changed through the human-computer interaction interface of the terminal 110 , and the working status of the mobile module 140 can be monitored.

In this embodiment, the third control parameter includes at least one of a set moving speed, module zeroing and a set moving position of the moving module, and the second state information is at least one of whether the moving module is zeroed and the moving speed.

By setting the moving speed and moving position of the moving module 140, the photon counter 130 can be accurately moved by the moving module 140, so that the photon counter 130 can collect measurement data in time. By returning the moving module 140 to zero, the moving module 140 can be calibrated to ensure accuracy when used next time.

The working status of the mobile module 140 can be judged in time by whether the mobile module has returned to zero and the moving speed, giving the user accurate and timely feedback.

Please continue to refer to FIG. 1 and FIG. 2 , the control system 100 of the optoelectronic nose further includes a plurality of temperature control modules 150 , and the temperature control modules 150 are electrically connected to the sub-interfaces 1221 in a one-to-one correspondence.

The terminal 110 is used to set the fourth control parameter and send a query instruction, the main control board 120 is used to obtain the fourth control parameter and control the temperature control module 150 according to the fourth control parameter, and the main control board 120 is also used to query the working status of the temperature control module 150 by sending a query instruction.

The reaction module 210 is a light sensor, and the temperature control module 150 is used to be connected one-to-one with the light sensor. The temperature control module 150 is used to control the working temperature of the light sensor connected to the temperature control module 150 according to the fourth control parameter. The temperature control module 150 feeds back the third state information to the terminal 110 through the main control board 120.

The temperature control module 150 may be a single chip microcomputer, and the temperature control module 150 may control the reaction temperature in the light sensor.

The temperature required for the reaction to occur in each light sensor is different, so each light sensor corresponds to a temperature control module 150. The temperature control module 150 is electrically connected to the main control board 120 through the sub-interface 1221, and the fourth control parameter for controlling the temperature control module 150 can be set through the human-computer interaction interface of the terminal 110. The fourth control parameter includes a fourth control parameter address, and the fourth control parameter address is used to identify the temperature control module 150 connected to different sub-interfaces 1221. Multiple temperature control modules 150 all receive the fourth control parameter, but only the temperature control module 150 that matches the fourth control parameter address executes the fourth control parameter to control the temperature of different light sensors.

The terminal 110 is also used to send a query instruction to query the working state of the temperature control module 150. The temperature control module 150 identifies the query instruction in the same manner as the fourth control parameter, which will not be described in detail here.

The third state information includes third state information addresses corresponding to different temperature control modules 150 . The main control board 120 determines the temperature control module 150 that sends the third state information according to the third state information address, thereby determining the working condition of the corresponding temperature control module 150 .

In this embodiment, the temperature control module 150 includes a heating unit and a temperature control unit. The heating unit is used to heat the reaction module 210. The temperature control unit is electrically connected to the heating unit to control the heating temperature of the heating unit.

Specifically, the heating unit provides a PWM (Pulse Width Modulation) heating voltage to a heating resistor in the optical sensor, so that the optical sensor performs a chemiluminescent reaction at a desired temperature. The temperature control unit may be a PID control (proportion-integral-derivative) unit, which controls the heating temperature of the heating unit so that the optical sensor operates at a constant temperature.

In some embodiments, the fourth control parameter includes at least one of the set target temperature and the set temperature control parameters of the temperature control module 150; the third status information is at least one of the target temperature, current temperature and temperature control parameters of the temperature control module 150; the query instruction includes checking the current temperature, checking the target temperature and checking at least one of the temperature control parameters.

The fourth control parameter covers the various parameters that need to be set for the temperature control module 150. Therefore, the fourth control parameter can be set through the human-computer interaction interface of the terminal 110 to modify the various parameters in the temperature control module 150 without having to set it through the control circuit board of each temperature control module 150. The query instruction covers the various working states that need to be confirmed by the temperature control module 150. The working state of each temperature control module can be queried by sending a query instruction through the human-computer interaction interface of the terminal 110. The third state information also covers the various working conditions of the temperature control module 150. The working conditions of the temperature control module 150 can be confirmed through the human-computer interaction interface of the terminal 110 to monitor the temperature control module 150 in real time.

Please continue to refer to Figures 1 and 2. The control system of the photoelectric nose also includes a power switch relay 160, a plasma generator 170 and a water cooling pump 180. The plasma generator 170 and the water cooling pump 180 are both electrically connected to the power switch relay 160. The plasma generator 170 is used to enhance the signal of the light sensor. The water cooling pump 180 is used to cool the photon counter 130. The main control board 120 has a third interface 123. The main control board 120 is electrically connected to the power switch relay 160 through the third interface 123.

The terminal 110 is used to send opening and closing instructions, and the main control board 120 is used to control the opening and closing of the power switch relay 160 according to the opening and closing instructions, so that when the power switch relay 160 is turned on, the plasma generator 170 and the water cooling pump 180 are both turned on, and when the power switch relay 160 is turned off, the plasma generator 170 and the water cooling pump 180 are both turned off.

The power switch relay 160 can control the opening and closing of the plasma generator 170 and the water cooling pump 180. The plasma generator 170 and the water cooling pump 180 are both powered by a DC power supply, and the plasma generator 170 and the water cooling pump 180 are both controlled by the power switch relay 160 to turn on and off the DC power supply.

The third interface 123 may be a GPIO (General-purpose input/output) interface. The human-computer interaction interface of the terminal 110 may send an opening and closing command to control the opening and closing of the plasma generator 170 and the water cooling pump 180 without the user having to manually open and close the plasma generator 170 and the water cooling pump 180.

The present invention further provides an optoelectronic nose, comprising an optoelectronic nose body 200 and an optoelectronic nose control system 100 provided by the above embodiment and electrically connected to the optoelectronic nose body 200.

The structure and working mode of the control system 100 of the optoelectronic nose have been described in detail in the above embodiments, and will not be described in detail here.

The photoelectric nose body 200 uses a light sensor as a reaction module 210, and is a device that works under the control of the photoelectric nose control system 100. The light sensor is based on the principle of catalytic chemiluminescence. The light sensor has a higher detection sensitivity, so it can be used as the reaction module 210 of the photoelectric nose.

Please continue to refer to FIG. 2 and FIG. 3 , the photonose body 200 also includes a syringe pump 220, a multi-channel switching valve 230 and a gas mass flow controller 240. Now, the working process of the photonose is briefly described. Air enters from the gas mass flow controller 240 as a carrier gas A, and the measured gas B is injected by the syringe pump 220. The carrier gas A and the measured gas B merge and enter the plasma generator 170, where they are activated and then enter the multi-channel switching valve 230. Through the multi-channel switching valve 230, they flow into different reaction modules 210 respectively. The reaction modules 210 are adjusted to different reaction temperatures by the temperature control module 150 to perform catalytic chemiluminescence reactions. The photons obtained by the reaction are collected by the photon counter 130 to obtain reaction data. The photon counter 130 can be moved between multiple reaction modules 210 under the action of the moving module 140. The photon counter 130 also needs to be cooled by the water cooling pump 180. The waste gas C after the reaction is discharged from the other end of the reaction module 210.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims (9)

1. A control system for an optoelectronic nose, characterized in that it comprises a terminal, a main control board and a photon counter, wherein the terminal is electrically connected to the main control board, and the photon counter is electrically connected to the main control board; The terminal is used to set a first control parameter and a second control parameter; The main control board is used to obtain the first control parameter and control the photon counter according to the first control parameter; the first control parameter includes at least one of sampling time, power on and power off; The photon counter is used to collect measurement data of the reaction module in the photoelectronic nose, and send the measurement data to the terminal through the main control board; The terminal is used to receive the measurement data; The main control board is also used to be electrically connected to the injection pump, multi-channel switching valve and gas mass flow controller in the photoelectronic nose; The main control board is used to obtain the second control parameter and control the injection pump, the multi-channel switching valve and the gas mass flow controller according to the second control parameter, and the injection pump, the multi-channel switching valve and the gas mass flow controller feed back the first state information to the terminal through the main control board; The second control parameters include at least one of the initialization setting, injection speed setting, injection volume setting and automatic injection setting of the injection pump, the second control parameters also include at least one of the control flow setting and the measurement current flow setting of the gas mass flow controller, and the second control parameters also include at least one of the change switching speed setting and the change switching position of the multi-channel switching valve; The first state information includes at least one of the injection pump state and the injection process state of the injection pump, the first state information also includes at least one of the current set flow value and the current measured flow value of the gas mass flow controller, and the first state information also includes at least one of the set switching speed and the current switching valve position of the multi-channel switching valve. 2. The control system of the photoelectronic nose according to claim 1, characterized in that there are multiple photon counters, and the photon counters are arranged in a one-to-one correspondence with the multiple reaction modules in the photoelectronic nose, and the photon counters are used to collect the measurement data of the reaction modules corresponding to the photon counters; Alternatively, it further includes a moving module, which is connected to the photon counter and is used to control the photon counter to move between the reaction modules in the photoelectronic nose so that the photon counter collects the measurement data of the reaction module corresponding to the photon counter. 3. The control system of the photoelectronic nose according to claim 2 is characterized in that the main control board has a first interface and a second interface, the main control board is electrically connected to the photon counter through the first interface, the second interface includes a plurality of sub-interfaces, and the injection pump, multi-channel switching valve and gas mass flow controller in the photoelectronic nose are electrically connected to the main control board through different sub-interfaces respectively; The mobile module is electrically connected to the main control board via the sub-interface; The terminal is used to set a third control parameter, the main control board is used to obtain the third control parameter and control the mobile module according to the third control parameter, and the mobile module feeds back second status information to the terminal through the main control board. 4. The control system of the photoelectric nose according to claim 3 is characterized in that the third control parameter includes at least one of the set moving speed, module zeroing and set moving position of the moving module, and the second state information is at least one of whether the moving module is zeroed and the moving speed. 5. The control system of the optoelectronic nose according to claim 4, characterized in that it also includes a plurality of temperature control modules, wherein the temperature control modules are electrically connected to the sub-interfaces in a one-to-one correspondence; The terminal is used to set the fourth control parameter and send a query instruction, the main control board is used to obtain the fourth control parameter and control the temperature control module according to the fourth control parameter, and the main control board is also used to query the working status of the temperature control module by sending the query instruction; The reaction module is a light sensor, the temperature control module is used to be connected to the light sensor in a one-to-one correspondence, the temperature control module is used to control the working temperature of the light sensor connected to the temperature control module according to the fourth control parameter, and the temperature control module feeds back the third state information to the terminal through the main control board. 6. The control system of the photoelectric nose according to claim 5 is characterized in that the temperature control module includes a heating unit and a temperature control unit, the heating unit is used to heat the reaction module, and the temperature control unit is electrically connected to the heating unit to control the heating temperature of the heating unit. 7. The control system of the photoelectric nose according to claim 5, characterized in that the fourth control parameter comprises at least one of a set target temperature and a set temperature control parameter of the temperature control module; The third state information is at least one of a target temperature, a current temperature and a temperature control parameter of the temperature control module; The query instruction includes at least one of checking the current temperature, checking the target temperature, and checking the temperature control parameter. 8. The control system of the photoelectric nose according to any one of claims 1 to 7, characterized in that it also includes a power switch relay, a plasma generator and a water cooling pump, wherein the plasma generator and the water cooling pump are both electrically connected to the power switch relay, the plasma generator is used to enhance the signal of the light sensor, the water cooling pump is used to cool the photon counter, and the main control board has a third interface, and the main control board is electrically connected to the power switch relay through the third interface; The terminal is used to send an opening and closing instruction, and the main control board is used to control the opening and closing of the power switch relay according to the opening and closing instruction, so that when the power switch relay is turned on, the plasma generator and the water cooling pump are both turned on, and when the power switch relay is turned off, the plasma generator and the water cooling pump are both turned off. 9. An optoelectronic nose, characterized in that it comprises an optoelectronic nose body and a control system of any one of claims 1 to 8 electrically connected to the optoelectronic nose body.