Electrochemical sensor circuit, electrochemical sensor circuit for odor component identification, and odor identification system

Abstract

The purpose of the present invention is to provide a technique with which it is possible to identify a chemical substance in a sample with high accuracy. In the present technology, an electrochemical sensor circuit and the like are provided, the electrochemical sensor circuit includes at least two electrochemical sensor units respectively connected to one AC signal generation unit, and at least one response signal output circuit outputting response signals from the electrochemical sensor units. And a recognition system unit that recognizes a chemical substance in the sample on the basis of an output from the response signal output circuit.

Description

Technical Field

[0001] The present technology relates to an electrochemical sensor circuit, an electrochemical sensor circuit for identifying odor components, and an odor identification system. More specifically, the present technology relates to an electrochemical sensor circuit, an electrochemical sensor circuit for identifying odor components, and an odor identification system that can identify chemical substances in a sample with high accuracy. Background Art

[0002] Electrochemical sensors are one of the most common sensors currently used in industry, and are widely used in fields such as gas detection, water quality inspection, bioanalysis, and food inspection. By using this type of sensor, chemical substances can be detected based on electronic parameters generated by electrochemical reactions that utilize the type, concentration, etc. of the chemical substance.

[0003] In the prior art, a circuit using an electrochemical sensor for detecting chemical substances has been proposed. For example, Patent Document 1 discloses a sensor interface circuit, which includes an impedance characteristic sensor interface circuit, which independently sends a differential stable bias signal component and a differential time-varying AC excitation signal component to check the impedance of the electrochemical sensor, and the electrochemical sensor has a sensor input node, a first and a second differential sensor feedback node, and a sensor output node; the impedance characteristic sensor interface circuit includes an impedance excitation amplifier circuit and a sensor response amplifier circuit, and the impedance excitation amplifier circuit includes a first differential input pair, a second differential input The sensor interface circuit is a circuit comprising a first differential input pair and a third differential input pair, wherein during a sensor impedance check mode, the first differential input pair is coupled to receive a differential time-varying AC excitation signal component for communication with the first and second amplifier input nodes, the second differential input pair is coupled to receive a differential stable bias signal component for communication with the first and second amplifier input nodes, and the third differential input pair is coupled to receive a feedback signal from a differential sensor feedback node for communication with the first and second amplifier input nodes, and the sensor response amplifier circuit is coupled to a sensor for receiving a response signal to the differential time-varying AC excitation signal component for communication with a sensor response signal output node during the sensor impedance check mode. In the sensor interface circuit, by applying the generated AC signal to an electrochemical sensor for detecting gas and measuring the response signal to the AC signal, a change in the AC impedance of the electrochemical sensor can be detected by the response signal output circuit, thereby determining the adsorption state of the gas.

[0004] Citation List

[0005] Patent Literature

[0006] Patent Document 1: Japanese Patent Application Laid-Open No. 2018-189651 Summary of the invention

[0007] Problem that the invention aims to solve

[0008] However, in the circuit of the prior art, only one electrochemical sensor is connected to one AC signal generating unit, so only one-dimensional impedance change can be detected, and it is difficult to detect the chemical substances in the sample with high accuracy. In particular, this is significant in identifying gases mixed with multiple components such as gases containing odor components.

[0009] Therefore, the main purpose of the present technology is to provide a technology that can identify chemical substances in samples with high accuracy.

[0010] Solution to the problem

[0011] The present technology first provides an electrochemical sensor circuit, which includes at least two or more electrochemical sensor units respectively connected to an AC signal generating unit, at least one or more response signal output circuits that output response signals from the electrochemical sensor units, and an identification system unit that identifies chemical substances in a sample based on the output from the response signal output circuit.

[0012] In addition, the present technology also provides an electrochemical sensor circuit for identifying odor components, which includes at least two or more electrochemical sensor units respectively connected to an AC signal generating unit, at least one or more response signal output circuits that output response signals from the electrochemical sensor units, and an identification system unit that identifies odor components in a sample based on the output from the response signal output circuit.

[0013] In addition, the present technology also provides an odor identification system, which includes an electrochemical sensor circuit for identifying odor components and a material box, wherein the electrochemical sensor circuit for identifying odor components includes at least two or more electrochemical sensor units respectively connected to an AC signal generating unit, at least one or more response signal output circuits that output response signals from the electrochemical sensor units, and an identification system unit that identifies odor components in a sample based on the output from the response signal output circuit, and the material box includes an odor retention part that retains the odor components. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 : is a circuit diagram showing the basic structure of the electrochemical sensor circuit 1 .

[0015] Figure 2 1 is a diagram showing an example of a specific configuration of the response signal output circuit 13 .

[0016] Figure 3 is a diagram showing an example of a specific configuration of the recognition system unit 14 .

[0017] Figure 4 is a diagram showing the identification system unit 14 and Figure 3 Views of examples of different specific compositions.

[0018] Figure 5 is a diagram showing the identification system unit 14 and Figure 3 and Figure 4 Views of examples of different specific compositions.

[0019] Figure 6 is a diagram showing an example of a specific configuration of the identification system unit 14 and the sample generation unit 15 .

[0020] Figure 7 3 is a circuit diagram showing the configuration of Circuit Configuration Example 1.

[0021] Figure 8 This is a circuit diagram showing the configuration of Circuit Configuration Example 2.

[0022] Fig. 9 This is a circuit diagram showing the configuration of Circuit Configuration Example 3.

[0023] Fig.10 This is a circuit diagram showing the configuration of Circuit Configuration Example 4.

[0024] Fig.11 This is a circuit diagram showing the configuration of Circuit Configuration Example 5.

[0025] Fig.12 This is a circuit diagram showing the configuration of Circuit Configuration Example 6.

[0026] Fig.13 This is a circuit diagram showing the configuration of Circuit Configuration Example 7.

[0027] Fig.14 This is a circuit diagram showing the configuration of Circuit Configuration Example 8.

[0028] Fig.15 This is a circuit diagram showing the configuration of Circuit Configuration Example 9.

[0029] Fig.16 This is a circuit diagram showing the configuration of Circuit Configuration Example 10.

[0030] Fig.17 This is a circuit diagram showing the configuration of circuit configuration example 11.

[0031] Fig.18 is a perspective view showing an example of an embodiment of the cartridge 10 .

[0032] Fig.19 yes Fig.18 A cross-sectional view of a cartridge 10 of the embodiment shown.

[0033] Fig. 20 is a schematic diagram showing an example of an embodiment of the odor recognition system 3 . DETAILED DESCRIPTION

[0034] Hereinafter, preferred modes for carrying out the present technology will be described with reference to the drawings.

[0035] The embodiments to be described below are intended to explain examples of representative embodiments of the present technology, and the scope of the present technology will not be construed more narrowly by these embodiments. Note that the description will be given in the following order.

[0036] 1. First Embodiment (Electrochemical Sensor Circuit 1)

[0037] (1) Basic Configuration of Electrochemical Sensor Circuit 1

[0038] (2) AC signal generating unit 11

[0039] (3) Electrochemical sensor unit 12

[0040] (4) Response signal output circuit 13

[0041] (5) Identification system unit 14

[0042] (6) Sample generation unit 15

[0043] (7) Specific Configuration of Electrochemical Sensor Circuit 1

[0044] (7-1) Circuit Configuration Example 1

[0045] (7-2) Circuit Configuration Example 2

[0046] (7-3) Circuit Configuration Example 3

[0047] (7-4) Circuit Configuration Example 4

[0048] (7-5) Circuit Configuration Example 5

[0049] (7-6) Circuit Configuration Example 6

[0050] (7-7) Circuit Configuration Example 7

[0051] (7-8) Circuit Configuration Example 8

[0052] (7-9) Circuit Configuration Example 9

[0053] (7-10) Circuit Configuration Example 10

[0054] (7-11) Circuit Configuration Example 11

[0055] 2. Second Embodiment (Electrochemical Sensor Circuit 2 for Odor Component Identification)

[0056] 3. Third Implementation Method (Smell Recognition System 3)

[0057] (1) Basic structure of odor recognition system 3

[0058] (2) Odor component recognition electrochemical sensor circuit 2

[0059] (3) Material box 10

[0060] (3-1) Odor retention unit 101

[0061] (3-2) Ventilation section 102

[0062] (3-3) Connecting portion 103

[0063] (3-4) Discharge Unit 104

[0064] (3-5) Operation Example of the Magazine 10

[0065] (4) Sample generation unit 34

[0066] (4-1) Cartridge Holding Unit 31

[0067] (4-2) Front storage section 32

[0068] (4-3) Back side storage section 33

[0069] (5) Example of use of odor recognition system 3

[0070] 1. First Embodiment (Electrochemical Sensor Circuit 1)

[0071] (1) Basic Configuration of Electrochemical Sensor Circuit 1

[0072] Figure 1 is a circuit diagram showing a basic configuration of an electrochemical sensor circuit 1. The electrochemical sensor circuit 1 according to the present embodiment includes at least two or more electrochemical sensor units 12 respectively connected to one AC signal generating unit 11, at least one or more response signal output circuits 13 outputting response signals from the electrochemical sensor units 12, and an identification system unit 14 identifying a chemical substance in a sample based on the output from the response signal output circuit 13. In addition, the electrochemical sensor circuit 1 may include a sample generating unit 15 and the like as needed.

[0073] Hereinafter, each unit of the electrochemical sensor circuit 1 will be described in detail.

[0074] (2) AC signal generating unit 11

[0075] The AC signal generating unit 11 generates an AC signal. In the present embodiment, the frequency of the AC signal generating unit 11 can be varied within an arbitrary range and used variably. As a result, for example, an AC signal can be applied at a different frequency for each electrochemical sensor unit 12 described later. The frequency of the AC signal generating unit 11 is not particularly limited, and any frequency (e.g., a range of 1 kHz to 10 MHz, etc.) can be used.

[0076] In this embodiment, the frequency of the AC signal generating unit 11 can be controlled based on the recognition result of the recognition system unit 14 described later. The specific description will be given in "(7) Specific structure of the electrochemical sensor circuit 1".

[0077] Furthermore, in the present embodiment, the number of AC signal generating units 11 is not particularly limited as long as there is more than one AC signal generating unit 11. In the case where there are more than two AC signal generating units 11, the frequencies output from the respective AC signal generating units 11 may be the same, but some or all of them may be different.

[0078] When there are two or more AC signal generating units 11, an AC signal generating unit 11 having a different frequency may be provided for each row or column of the electrochemical sensor units 12 arranged in an array or a portion of the response signal output circuit 13. The specific description will be given in "(7) Specific configuration of the electrochemical sensor circuit 1".

[0079] (3) Electrochemical sensor unit 12

[0080] The electrochemical sensor unit 12 generates an electronic parameter (e.g., current, voltage, capacitance, impedance, etc., preferably impedance) as a response signal using an electrochemical reaction derived from the type and concentration of the chemical substance. In this embodiment, the number of the electrochemical sensor units 12 is not particularly limited, as long as at least two or more electrochemical sensor units 12 are respectively connected to one AC signal generating unit 11.

[0081] In the present embodiment, as a result of providing at least two or more electrochemical sensor units 12 connected to one AC signal generating unit 11, chemical substances in a sample can be identified with high accuracy. More specifically, measurements can be performed at an optimal frequency for each type and size of the membrane constituting the electrochemical sensor unit 12, and gases mixed with multiple components such as gases containing odor components can be identified based on the difference in response signals caused by the type and size of the membrane. In addition, the area efficiency of the peripheral circuit is improved. In addition, by controlling the drive of the AC signal generating unit 11 and the like according to the recognition state, etc., further improvement in recognition accuracy can be expected.

[0082] In this specification, "chemical substance" is an object to be identified contained in a sample, and refers to any chemical substance, such as a monomer, a pure substance composed of a compound, or a mixture. In addition, the source of the chemical substance is not particularly limited, is not limited to a natural source, and the chemical substance may be of artificial origin.

[0083] In this specification, "sample" refers to any sample including biological samples. In addition, in the present technology, the state of the sample is not particularly limited, but is preferably any one of a gaseous state, a liquid state, a semi-solid state and a solid state, and a gaseous state is particularly preferred. Note that the term "gas" refers to a gas that is completely vaporized at room temperature (25°C). In addition, the term "liquid" refers to a liquid that is completely liquefied at room temperature. In addition, a solid refers to a solid that is completely solidified at room temperature. In addition, a semi-solid refers to a semi-solid that has a melting point of 25°C or above but is not completely solidified at room temperature. The chemical substances in the sample may be fixed on the sample by attachment, adsorption, burial, etc., or may float in the sample without being fixed.

[0084] The electrochemical sensor unit 12 is not particularly limited, and an electrochemical sensor known in the prior art can be used. Among the electrochemical sensors known in the prior art, an amperometric electrochemical sensor (i.e., a current measuring sensor) is common. An amperometric electrochemical sensor basically has at least a working electrode, a counter electrode, and a reference electrode.

[0085] The working electrode is configured to cause a redox reaction on the surface of the working electrode when a predetermined voltage is applied to the working electrode relative to a reference electrode by an electrical circuit such as a potentiostat in a state where a sample exists between the working electrode and the counter electrode. More specifically, the working electrode includes a laminate including a film and a support member, the film causing a redox reaction of chemical substances in the sample on the surface of the working electrode when a predetermined voltage is applied between the working electrode and the counter electrode in a state where the sample is attached, and the support member is formed on one surface of the film.

[0086] In this specification, the term "film" includes films with any hardness, and the term "film" includes very rigid films and very flexible films. Examples of films include metal films of platinum, gold, etc., films of graphite carbon, boron-doped diamond, etc., and polymer films formed by conductive polymers such as polyaniline or polythiophene. The support member is preferably formed of a conductive material, examples of which include silicon substrates and metal substrates. Examples of metal substrates include platinum (Pt), gold (Au), copper (Cu), palladium (Pd), nickel (Ni) and silver (Ag). In order to form a film on one surface of the support member, a metal film can be formed by sputtering, a gas phase synthesis method, etc., and a polymer film can be formed by methods known in the prior art such as chemical modification. In the present embodiment, the size of the film (for example, a few μm) is preferably 20 μm.2 ~A few mm 2 There are no particular restrictions on the area, thickness, etc.

[0087] The reference electrode and the counter electrode are arranged near the working electrode, and the counter electrode is arranged to surround the working electrode and the reference electrode. In a state where the chemical substance is attached to the working electrode and the counter electrode, by applying a predetermined voltage between the working electrode and the counter electrode, an oxidation-reduction reaction occurs at the working electrode and the counter electrode, whereby an electric current flows between the working electrode and the counter electrode. In other words, the counter electrode is an electrode for causing the electric current generated by the electrochemical reaction to flow through the working electrode.

[0088] As the counter electrode, for example, an electrode formed of a metal such as Pt, Au, Cu, Pd, Ni or Ag, a diamond electrode, a boron-doped diamond electrode, a carbon electrode, etc. can be used. The counter electrode can be formed using a method known in the art such as a semi-additive method and a subtractive method.

[0089] The reference electrode is an electrode used as a reference when determining the potential of the working electrode. As a reference electrode, for example, a silver / silver chloride (Ag / AgCl) electrode or the like can be used. In addition, a standard hydrogen electrode, a reversible hydrogen electrode, a palladium hydrogen electrode, a saturated calomel electrode, a carbon electrode, a diamond electrode, a boron-doped diamond electrode or the like can be used. In addition, as a reference electrode, an electrode formed of a metal such as Pt, Au, Cu, Pd, Ni or Ag can be used. The reference electrode can be formed using methods known in the prior art such as dispensing and screen printing.

[0090] In this embodiment, at least some of the electrochemical sensor cells 12 may be arranged in an array. Specific description will be given in "(7) Specific configuration of the electrochemical sensor circuit 1".

[0091] In this embodiment, the two or more electrochemical sensor units 12 may be of the same type, or may be partially or entirely of different types. When two or more electrochemical sensor units 12 of the same type are configured, the two or more electrochemical sensor units 12 of the same type may be measured at different frequencies. The specific description will be made in "(7) Specific configuration of the electrochemical sensor circuit 1".

[0092] In addition, in this embodiment, by constructing an electrochemical sensor group including two or more electrochemical sensor units 12 and providing a plurality of electrochemical sensor groups, it is possible to perform measurement at different frequencies for each electrochemical sensor group.

[0093] (4) Response signal output circuit 13

[0094] The response signal output circuit 13 outputs a response signal from the electrochemical sensor unit 12. In the present embodiment, the number of the response signal output circuits 13 is not particularly limited as long as there is one or more response signal output circuits 13.

[0095] Figure 2 1 is a diagram showing an example of a specific configuration of the answer signal output circuit 13. The answer signal output circuit 13 is not particularly limited, but at least some of the answer signal output circuits 13 include an IQ conversion circuit and an AD conversion circuit. This can improve the recognition accuracy.

[0096] The IQ conversion circuit expands (converts) the target signal into a complex signal. Specifically, it generates an I signal having the same phase (In-Phase) as the reference signal and a Q signal having a quadrature phase (Quadrature-phase) shifted 90° from the reference signal. The IQ conversion circuit supplies the I signal and the Q signal to the AD conversion circuit.

[0097] More specifically, the IQ conversion circuit includes, for example, a transimpedance amplifier (TIA), an analog multiplier, and a low-pass filter (LPF). The TIA converts the current output from the electrochemical sensor unit 12 into a voltage signal. The converted voltage signal is calculated at high speed by the analog multiplier. The analog multiplier is not particularly limited, and an analog multiplier known in the prior art can be used. Specifically, examples of analog multipliers include the commonly used Gilbert cell-type analog multiplier. The LPF extracts a direct current (DC) component from the calculation result of the analog multiplier. The DC components of the I signal and the Q signal correspond to the real component and the imaginary component of the input signal, and therefore, the amplitude and phase in the above-mentioned electrochemical sensor unit 12 can be calculated, which makes it possible to calculate the impedance at the measurement site. The LPF is not particularly limited, and examples of the LPF include an RC low-pass filter.

[0098] The AD conversion circuit converts the I signal and Q signal in analog format into signals in digital format, and supplies the signals to the identification system unit 14 described later. The AD conversion circuit is not particularly limited, and a single slope type AD converter known in the prior art can be used. In the single slope type AD converter, the analog signal to be processed is converted into a digital signal based on the period from the start of conversion until the reference voltage coincides with the signal voltage to be processed. As a mechanism for this, for example, a comparator (voltage comparator) that compares a single slope waveform with the DC level of the output signal of the IQ conversion circuit and a counter that measures the comparison time are used to supply a reference voltage, and count with a clock signal at the same time, and perform AD conversion by comparing the DC level of the signal output from the IQ conversion circuit with the reference voltage and counting until a pulse signal is obtained.

[0099] In this embodiment, the AD conversion circuit can reduce noise by performing multi-sampling (multiple operations). This can improve the recognition accuracy.

[0100] Furthermore, in the present embodiment, in the response signal output circuit 13, the circuit constant can be freely changed by changing the band to be cut off by the LPF according to the type, size, etc. of the film constituting the electrochemical sensor unit 12. This can optimize the circuit constant according to the type, size, etc. of the film and improve the recognition accuracy.

[0101] In addition, in this embodiment, at least some of the response signal output circuits 13 may be arranged in an array. In addition, at least two or more electrochemical sensor units 12 may be connected to one response signal output circuit 13, respectively. The specific description will be given in "(7) Specific configuration of the electrochemical sensor circuit 1".

[0102] In addition, in the present embodiment, as described above, in the case where the frequency of the AC signal generating unit 11 is used variably, the response signal output circuit 13 may include two or more switches, and the frequency of each switch and the AC signal generating unit 11 may be controlled according to the electrochemical sensor unit 12. The specific description will be given in "(7) Specific configuration of the electrochemical sensor circuit 1".

[0103] (5) Identification system unit 14

[0104] The identification system unit 14 identifies the chemical substance in the sample based on the output of the response signal output circuit 13. In the present embodiment, the number of the identification system units 14 is not particularly limited as long as there is one or more identification system units 14.

[0105] In this embodiment, the identification system unit 14 can identify the chemical substance in the sample by checking the response signal of each electrochemical sensor unit 12 against the database. The details will be described in "(7) Specific structure of the electrochemical sensor circuit 1".

[0106] Figure 3 1 is a diagram showing an example of a specific configuration of the recognition system unit 14. The recognition system unit 14 includes at least an impedance calculation device 141, a quantification device 142, and a recognition device 143. Figure 4 and Figure 5 As shown, the identification system unit 14 may include a notification device 144, a display device 145, a communication device 146, etc. as needed.

[0107] The impedance calculation device 141 calculates the impedance based on the digital signal output from the AD conversion circuit in the response signal output circuit 13. In the above-mentioned electrochemical sensor unit 12, the value of the impedance as the response signal of the electrochemical sensor unit 12 varies according to the type, concentration, etc. of the chemical substance. Therefore, the quantification device 142 quantifies the chemical substance in the sample based on the calculated impedance result. In addition, the identification device 143 identifies the chemical substance in the sample based on the result of quantifying the chemical substance in the sample. For example, the identification of one or more chemical substances, the number of chemical substance types, the concentration of chemical substances, etc. are determined.

[0108] Figure 4 is a diagram showing the identification system unit 14 and Figure 3 1 and 12. In the present embodiment, the recognition system unit 14 may include a notification device 144 and / or a display device 145. The notification device 144 performs control to issue an alarm for drawing attention, warning, etc. based on the recognition result from the recognition system unit 14. The display device 145 performs control to display the recognition result from the recognition system unit 14 on a display, a monitor, a smart phone, a tablet terminal, a wearable terminal, a digital sign, etc. The electrochemical sensor circuit 1 has these devices so that the data of the chemical substance recognized on site can be confirmed.

[0109] Figure 5 is a diagram showing the identification system unit 14 and Figure 3 and Figure 4 Views of examples of different specific configurations. In the present embodiment, the identification system unit 14 includes a communication device 146. For example, when two or more communication devices 146 are configured between the quantitative device 142 and the identification device 143 and these communication devices are connected in a wireless or wired manner, a signal related to the result of the remote quantitative measurement of the chemical substance in the sample is obtained via the network, and the chemical substance in the sample is identified based on the signal. This makes it possible to confirm the data of the identified chemical substance even at a remote location. Note that in the present embodiment, the communication device 146 can be configured between the impedance calculation device 141 and the quantitative device 142, or can be configured between the identification device 143 and the notification device 144 and / or the display device 145.

[0110] (6) Sample generation unit 15

[0111] As needed, the electrochemical sensor circuit 1 according to the present embodiment may include a sample generating unit 15. The sample generating unit 15 generates a sample containing a chemical substance based on the recognition result of the recognition system unit 14. Specifically, the sample generating unit 15 is connected to the recognition system unit 14 in a wireless or wired manner, and based on the recognition result output from the recognition system unit 14, the sample containing the chemical substance (particularly the odor component) is sent to the target space by spraying, etc. In the present embodiment, more than two sample generating units 15 may be provided, and the number of the sample generating units 15 is not particularly limited.

[0112] Figure 6 1 is a diagram showing an example of a specific configuration of the identification system unit 14 and the sample generation unit 15. The sample generation unit 15 includes at least a control device 151 and a generation unit 152. In addition, the sample generation unit 15 may include a communication device 153, a mixing unit 154, etc. as necessary.

[0113] The control device 151 determines the kind, concentration, etc. of one or more chemical substances to be produced in the target space based on the signal indicating the recognition result obtained from the recognition system unit 14. The kind, concentration, etc. of the chemical substances in the sample to be produced may be the same as the recognition result, or may be newly prepared based on the recognition result. In addition, in the case of newly preparing the kind, concentration, etc., the control device 151 may refer to a database on a network such as a server or a cloud system.

[0114] The generation unit 152 generates a sample in the target space based on the type, concentration, etc. of the chemical substance determined by the control device 151. At this time, the sample can be in any state of gas, liquid, semi-solid and solid, but the sample is particularly preferably a gas. In addition, the generation unit 152 can control the intensity of the generation of the sample in the target space. For example, when the chemical substance exists at a concentration equal to or higher than a preset threshold, the generation unit 152 can weaken the generation of the sample or stop the generation of the sample. In addition, the generation unit 152 can change the intensity of the generation of the sample over time.

[0115] In this embodiment, if Figure 6 As shown, there may be more than two generating units 152. In this case, samples containing the same chemical substance may be generated from each generating unit 152, or samples containing different chemical substances may be generated from a part or all of the generating units 152, respectively.

[0116] When the sample generation unit 15 and the identification system unit 14 are connected wirelessly or by wire, the communication device 153 remotely acquires a signal indicating the identification result via the network. This makes it possible to generate a sample containing a chemical substance at a remote location based on the identification result of the identification system unit 14.

[0117] Note that in this embodiment, the communication device 153 is not an essential configuration, and a sample containing a chemical substance identified on site can be produced even when the communication device 153 is not provided.

[0118] In the case where there are two or more generation units 152, the mixing unit 154 mixes the samples from the respective generation units 152 at an arbitrary ratio. This makes it possible to generate a mixed sample obtained by mixing samples containing chemical substances in the target space. In addition, the mixing unit 154 can control the generation intensity of the mixed sample in the target space, and can change the ratio when mixing the samples from the respective generation units 152 over time.

[0119] (7) Specific Configuration of Electrochemical Sensor Circuit 1

[0120] The specific configuration of the electrochemical sensor circuit 1 according to the present embodiment will be described in detail below. Note that the number of the AC signal generating unit 11, the electrochemical sensor unit 12, the response signal output circuit 13 including the IQ conversion circuit and the AD conversion circuit, and the odor recognition system unit 14 in each circuit configuration example is only an example, and the present embodiment is not limited thereto. In addition, for the sake of convenience, the membranes of two or more electrochemical sensor units 12 in each circuit configuration example are only given different names, and all the membranes may be of the same kind, or a part or all of the membranes may be of different kinds.

[0121] (7-1) Circuit Configuration Example 1

[0122] Figure 7 is a circuit diagram showing the configuration of circuit configuration example 1. In circuit configuration example 1, nine electrochemical sensor units 12 including membranes A to I are arranged in an array relative to one AC signal generating unit 11. The response signal output circuit 13 is arranged in a column direction relative to the electrochemical sensor units 12 arranged in an array. By such a circuit configuration, it is possible to improve layout efficiency and reduce the entire area of ​​the electrochemical sensor circuit 1. Note that, although not shown, in the present embodiment, the response signal output circuit 13 may be arranged in a row direction relative to the electrochemical sensor units 12 arranged in an array.

[0123] (7-2) Circuit Configuration Example 2

[0124] Figure 8is a circuit diagram showing the configuration of circuit configuration example 2. In circuit configuration example 2, there are nine electrochemical sensor units 12 including membranes A to I with respect to one AC signal generating unit 11, and the IQ conversion circuit constituting the response signal output circuit 13 is arranged in an array for each electrochemical sensor unit 12. The AD conversion circuit constituting the response signal output circuit 13 is arranged in a layout in the column direction relative to the IQ conversion circuit arranged in an array. By such a circuit configuration, the layout efficiency can be improved and the entire area of ​​the electrochemical sensor circuit 1 can be reduced. Note that, although not shown, in the present embodiment, the AD conversion circuit can be arranged in the row direction relative to the IQ conversion circuit arranged in an array.

[0125] (7-3) Circuit Configuration Example 3

[0126] Fig. 9 is a circuit diagram showing the configuration of circuit configuration example 3. In circuit configuration example 3, there are three electrochemical sensor units 12 including membranes A to C relative to one AC signal generating unit 11, and each electrochemical sensor unit 12 is connected to an IQ conversion circuit. In addition, two or more IQ conversion circuits are connected to one AD conversion circuit. In this case, a switch for controlling electrical connection may be provided between the AD conversion circuit and the IQ conversion circuit. Examples of switches include transistors and the like. Through such a circuit configuration, the number of AD conversion circuits can be reduced, layout efficiency can be improved, and the entire area of ​​the electrochemical sensor circuit 1 can be reduced.

[0127] (7-4) Circuit Configuration Example 4

[0128] Fig.10 is a circuit diagram showing the configuration of circuit configuration example 4. In circuit configuration example 4, there are three electrochemical sensor units 12 including membranes A to C with respect to one AC signal generating unit 11, and one response signal output circuit 13 is connected to each electrochemical sensor unit 12. In this case, a switch for controlling electrical connection may be provided between the IQ conversion circuit constituting the response signal output circuit 13 and each electrochemical sensor unit 12. Examples of the switch include transistors and the like. By such a circuit configuration, the number of response signal output circuits 13 can be reduced, layout efficiency can be improved, and the entire area of ​​the electrochemical sensor circuit 1 can be reduced.

[0129] Furthermore, in Circuit Configuration Example 4, the two or more electrochemical sensor cells 12 respectively connected to the response signal output circuits 13 may be of the same type. This makes it possible to adjust the sensitivity of the electrochemical sensor cell 12 .

[0130] (7-5) Circuit Configuration Example 5

[0131] Fig.11is a circuit diagram showing the configuration of circuit configuration example 5. In circuit configuration example 5, the configuration other than the identification system unit 14 is the same as that in circuit configuration example 4. In circuit configuration example 5, the identification system unit 14 identifies the chemical substance in the sample by checking the response signal of each electrochemical sensor unit 12 against a database on a network such as a server or a cloud system. In this case, the database can be constructed by an AI learning method such as deep learning. This can improve the recognition accuracy.

[0132] (7-6) Circuit Configuration Example 6

[0133] Fig.12 is a circuit diagram showing the configuration of circuit configuration example 6. In circuit configuration example 6, there are three electrochemical sensor units 12 including membranes A to C with respect to one AC signal generating unit 11, and respective response signal output circuits 13 are respectively connected to the respective electrochemical sensor units 12. In circuit configuration example 6, the frequency of the AC signal generating unit 11 is variably used. By such a circuit configuration, the number of AC signal generating units 11 can be reduced, layout efficiency can be improved, and the entire area of ​​the electrochemical sensor circuit 1 can be reduced.

[0134] Furthermore, in the circuit configuration example 6, the recognition result of the recognition system unit 14 may be fed back to control the frequency in the AC signal generation unit 11. This can improve the recognition accuracy and the recognition speed.

[0135] (7-7) Circuit Configuration Example 7

[0136] Fig.13 is a circuit diagram showing the configuration of circuit configuration example 7. In circuit configuration example 7, there are three electrochemical sensor units 12 including membranes A to C with respect to one AC signal generating unit 11, and a response signal output circuit 13 having a switch is connected to each electrochemical sensor unit 12. In circuit configuration example 7, the frequency of the AC signal generating unit 11 is used variably, and a control unit including a frequency control unit and a switch control unit is provided. The control unit controls the frequency of each switch and the AC signal generating unit 11 according to each electrochemical sensor unit 12 measuring an electrical parameter such as impedance. For example, when the electrochemical sensor unit 12 composed of membrane A is read out, the frequency of the AC signal generating unit 11 can be controlled by changing the frequency to 100KHz. Examples of switches include transistors and the like. By such a circuit configuration, the frequency to be observed can be changed according to the type and size of the membrane, and the chemical substance in the sample can be identified while weighting the response signal for each frequency. In addition, the layout efficiency can be improved and the entire area of ​​the electrochemical sensor circuit 1 can be reduced.

[0137] (7-8) Circuit Configuration Example 8

[0138] Fig.14 is a circuit diagram showing the configuration of Circuit Configuration Example 8. In Circuit Configuration Example 8, the configuration other than the AC signal generating unit 11 is the same as that in Circuit Configuration Example 2. In Circuit Configuration Example 8, three AC signal generating units 11 having different frequencies (e.g., 10 kHz, 100 kHz, and 1 MHz) are configured for each row. By such a circuit configuration, the readout speed can be improved. Note that, although not shown, in the present embodiment, two or more AC signal generating units 11 having different frequencies may be configured for each column.

[0139] Furthermore, in the circuit configuration example 8, two or more electrochemical sensor cells 12 of the same type may be arranged, and the electrochemical sensor cells 12 may be measured at different frequencies by two or more AC signal generating units 11 .

[0140] (7-9) Circuit Configuration Example 9

[0141] Fig.15 is a circuit diagram showing the configuration of circuit configuration example 9. In circuit configuration example 9, there is an electrochemical sensor group a having two electrochemical sensor units 12 including membranes A and B and an electrochemical sensor group b having two electrochemical sensor units 12 including membranes C and D. As described above, in circuit configuration example 9, a plurality of electrochemical sensor groups can be composed of two or more electrochemical sensor units 12 whose frequencies are expected to be observed are close to each other, and measurements can be performed at different frequencies for each electrochemical sensor group. In circuit configuration example 9, the frequency of the AC signal generating unit 11 is used variably. For example, in the case where it is expected to read out the electrochemical sensor group a at a low frequency and it is expected to read out the electrochemical sensor group b at a high frequency, the frequency of the AC signal generating unit 11 can be changed and optimized for each electrochemical sensor group. By such a circuit configuration, it is possible to improve layout efficiency and reduce the entire area of ​​the electrochemical sensor circuit 1.

[0142] (7-10) Circuit Configuration Example 10

[0143] Fig.16 is a circuit diagram showing the configuration of circuit configuration example 10. Circuit configuration example 10 is similar to circuit configuration example 9 in that an electrochemical sensor group a and an electrochemical sensor group b are provided, but the response signal output circuit 13 is shared between the electrochemical sensor groups. In this case, the response signal output circuit 13 shared by the electrochemical sensor groups can be connected by a switch. Examples of switches include transistors and the like. By such a circuit configuration, the number of response signal output circuits 13 can be reduced, layout efficiency can be improved, and the entire area of ​​the electrochemical sensor circuit 1 can be reduced.

[0144] (7-11) Circuit Configuration Example 11

[0145] Fig.17 is a circuit diagram showing the configuration of circuit configuration example 11. Circuit configuration example 11 is similar to circuit configuration examples 9 and 10 in that an electrochemical sensor group a and an electrochemical sensor group b are provided, but an AD conversion circuit as a part of the response signal output circuit 13 is shared between the electrochemical sensor groups. In this case, the AD conversion circuit shared by the electrochemical sensor groups can be connected by a switch. Examples of switches include transistors, etc. By such a circuit configuration, the number of AD conversion circuits can be reduced, the layout efficiency can be improved, and the entire area of ​​the electrochemical sensor circuit 1 can be reduced.

[0146] 2. Second Embodiment (Electrochemical Sensor Circuit 2 for Odor Component Identification)

[0147] The electrochemical sensor circuit 2 for identifying odor components according to the present embodiment includes at least two or more electrochemical sensor units 12 respectively connected to one AC signal generating unit 11, at least one or more response signal output circuits 13 outputting response signals from the electrochemical sensor units 12, and an identification system unit 14 for identifying odor components in a sample based on the output from the response signal output circuit 13. In other words, the above-mentioned electrochemical sensor circuit 1 is applied to odor component identification, and the configuration of the electrochemical sensor circuit 2 for identifying odor components is similar to that described above, so its description is omitted here.

[0148] In this specification, "odor component" may include any component such as odor molecules among the above-mentioned chemical substances that stimulates part or all of the receptors present in the nasal cavity. In the nasal cavity, in addition to olfactory receptors, there are trigeminal receptors that control stimuli such as cold, heat and pain, and the odor component in this technology is a broad concept, including all components that stimulate part or all of these receptors. Specifically, for example, in the case where menthol is used as an odor component, menthol can be used as a stimulus through the olfactory receptors, and can also be used as a cold stimulus through the receptors of the trigeminal nerve (TRPA1 channel).

[0149] 3. Third Implementation Method (Smell Recognition System 3)

[0150] (1) Basic structure of odor recognition system 3

[0151] Fig. 20 Schematic diagram showing an example of an embodiment of the odor recognition system 3. The odor recognition system 3 according to the present technology includes the above-mentioned electrochemical sensor circuit 2 for odor component recognition and a cartridge 10 (see FIG. 1 ) including an odor holding portion 101 for holding odor components. Fig.18 ). In addition, as needed, the odor recognition system 3 may include a sample generating unit 34 and the like.

[0152] Each unit will be described in detail below.

[0153] (2) Odor component recognition electrochemical sensor circuit 2

[0154] The electrochemical sensor circuit for odor component identification is similar to that described in "2. Second embodiment (Electrochemical sensor circuit 2 for odor component identification)", and therefore, the description thereof is omitted here.

[0155] (3) Material box 10

[0156] Fig.18 is a perspective view showing an example of an embodiment of the magazine 10, Fig.19 yes Fig.18 A cross-sectional view of the cartridge 10 of the embodiment shown. Fig.18 As shown, the material box 10 at least includes an odor retaining portion 101 for retaining odor components. In addition, as needed, the material box 10 may include a vent 102, a coupling portion 103, a discharge portion 104, etc.

[0157] (3-1) Odor retention unit 101

[0158] The odor retaining portion 101 is a portion that retains an odor component, and includes, for example, an impregnating agent, a container portion that accommodates the impregnating agent, and a cover portion that is attached to the container portion.

[0159] The material forming the impregnant is not particularly limited as long as it can retain the odor components, for example, it is formed of an organic polymer material so that the odor components are easily infiltrated. As the organic polymer material, for example, polyvinyl chloride, polyethylene, phenolic resin, olefin resin, nylon, polyester, synthetic rubber, silicone resin, natural rubber, protein, nucleic acid, lipid, polysaccharide, etc., or one or more thereof can be freely combined and used. In addition, for example, polymer resins such as acrylic resin, polyurethane resin, ABS resin, polyetheretherketone (PEEK) resin, polyacetal (POM) resin, fluororesin, cycloolefin polymer resin or polyimide resin; metals such as stainless steel, aluminum; inorganic crystals such as quartz; glass, etc., or one or more thereof can be freely combined and used. In addition, the impregnant can be formed to be porous, for example, a mesh structure, cork, mesoporous silica, calcium carbonate, etc. can be used. In addition, the impregnant can be formed to have a fibrous structure or a layered structure (for example, clay minerals, etc.).

[0160] The form of the impregnating agent is not particularly limited, and examples thereof include sheet, net, strip (including aggregates thereof), granular (including aggregates thereof), gel, liquid (including liquid maintained by surface tension, such as a carrier), foam, three-dimensional structure (for example, fish eye shape, spiral shape, spring shape, etc.), rope (including aggregates thereof), etc. The odor component retained in the impregnating agent is not particularly limited, and for example, as long as it is an odor-generating component, for example, liquid fragrance, powder fragrance, etc. as it is or a component obtained by dissolving or dispersing liquid fragrance, powder fragrance, etc. in a suitable solvent, essential oil as it is or a component obtained by diluting essential oil in a suitable solvent, fruit juice, food or beverage, etc. as it is or a component obtained by dissolving or dispersing fruit juice, food or beverage, etc. in a suitable solvent, one or more of them can be freely combined and used.

[0161] The container portion preferably has a two-layer structure, and includes, for example, an inner layer portion forming the inside for holding the impregnating agent and an outer layer portion forming the outside of the container portion.

[0162] The lid preferably has an opening at a position corresponding to the connection opening 40 (40a, 40b) described later. This allows air to flow into the container efficiently and air containing odor components to be discharged outside the container.

[0163] (3-2) Ventilation section 102

[0164] The vent 102 has at least an openable and closable vent opening 30. For example, the vent 102 may be configured to be divided into two sections (a first vent 102a, a second vent 102b) by two vent openings 30 (30a, 30b). Fig.18 and Fig.19 In the illustrated embodiment, the ventilation opening portion 30 includes an inflow ventilation opening portion 30a for allowing air to flow into the interior of the cartridge 10 and a discharge ventilation opening portion 30b for discharging air containing odor components.

[0165] In addition, an opening and closing mechanism may be connected to the ventilation opening portion 30 (30a, 30b). The specific structure of the opening and closing mechanism is not particularly limited as long as the ventilation opening portion 30 (30a, 30b) can be opened and closed, and can be freely designed. Specifically, for example, an opening and closing mechanism including a sealing cover 1021 (1021a, 1021b), a main shaft 1022, and a spring 1023 (1023a, 1023b) may be provided.

[0166] The vent 102 preferably has a two-layer structure, and includes, for example, an inner layer member that accommodates an opening and closing mechanism, and an outer layer member that forms the outer side of the vent 102 .

[0167] (3-3) Connecting portion 103

[0168] The coupling portion 103 includes at least two coupling openings 40 (40a, 40b) that allow the ventilation portion 102 and the odor retaining portion 101 to communicate with each other, and a partition 41 disposed upstream of one of the at least two coupling openings 40 (40a, 40b).

[0169] The two connection openings 40 (40a, 40b) include a first connection opening 40a that discharges air from the connection 103 to the odor holding portion 101 and a second connection opening 40b that discharges air containing odor components from the odor holding portion 102 to the connection 103. In this case, the air flowing into the connection 103 via the first ventilation portion 102a is discharged to the odor holding portion 101 via the first connection opening 40a and mixed with the odor components, and thereafter, the air containing the odor components flows into the connection 03 via the second connection opening 40b and is discharged to the outside via the second ventilation portion 102b.

[0170] The partition 41 is provided upstream of the second connection opening 40b among the two connection openings 40 (40a, 40b). By providing the partition 41, the air flowing into the connection part 103 is forced to become the air containing the odor component through the odor holding part 101, and flows into the connection part 101 again. As a result, the air containing the odor component can be effectively generated.

[0171] exist Fig.18 and Fig.19 In the illustrated embodiment, the coupling portion 103 may have an opening and closing mechanism in the connection region with the vent 102. Specifically, an opening and closing mechanism similar to that of the vent 102 may be used, for example, an opening and closing mechanism including a sealing cover 1031, a main shaft 1032, and a spring 1033 may be provided.

[0172] (3-4) Discharge Unit 104

[0173] The discharge portion 104 has at least a nozzle structure that can discharge the air containing the odor components to the outside and change the direction of the air containing the odor components.

[0174] The form of the discharge portion 104 is not particularly limited. For example, a cover covering the outer layer member may be used, but the present embodiment is not limited thereto. The outer layer member and the discharge portion 104 may be formed integrally.

[0175] (3-5) Operation Example of the Magazine 10

[0176] Hereinafter, an operation example of discharging the air containing the odor components in the magazine 10 will be described in detail.

[0177] exist Fig.18 and Fig.19 In the illustrated embodiment, if the ventilation portion 102 is opened in a state where the odor component is retained in the odor retaining portion 101, air flows in from the outside. The inflowing air flows into the connection portion 103, is mixed with the odor component through one connection opening portion 40a, and the air containing the odor component is discharged. In this state, the discharged air containing the odor component flows into the connection portion 103 via another connection opening portion 40b, and is discharged to the outside from the discharge portion 104.

[0178] Specifically, in the present embodiment, the ventilation opening portion 30 (30a, 30b) is provided with an opening and closing mechanism including a sealing cover 1021 (1021a, 1021b), a main shaft 1022 and a spring 1023 (1023a, 1023b), and the connecting portion 103 is also provided with an opening and closing mechanism including a sealing cover 1031, a main shaft 1032 and a spring 1033. For example, these opening and closing mechanisms can be controlled by inserting a push rod X from the side of the odor generating device from the lower part of the material box 10. If the push rod X is pressed, the push rod X pushes the first sealing cover 1021a to the inside of the first ventilation portion 102a, the inflow ventilation opening portion 30a is opened, and air flows into the first ventilation portion 102a. In this case, the first spring 1023a is contracted by the first sealing cover 1021a.

[0179] Since the first sealing cover 1021a is pushed in the inner direction of the first vent 102a, the main shaft 1022 attached to the first sealing cover 1021a moves in the direction of the coupling portion 103. The main shaft 1022 pushes the sealing cover 1031 to the inside of the coupling portion 103, and the air in the first vent 102a flows into the coupling portion 103. At this time, the spring 1033 is contracted by the sealing cover 1031. Through the partition 41, the air flowing into the coupling portion 103 first flows into the odor holding portion 101 via the first connection opening portion 40a, and mixes with the odor component held in the odor holding portion 102, thereby generating air containing the odor component. The air containing the odor component flows into the coupling portion 103 again via the second connection opening portion 40b.

[0180] Since the sealing cover 1031 is pushed in the inner direction of the coupling 103, the main shaft 1032 attached to the sealing cover 1031 moves in the direction of the second vent 102b. The main shaft 1032 pushes the second sealing cover 1021b to the inside of the second vent 102b, and the air containing the odor component in the coupling 103 flows into the second vent 102b. At this time, the second spring 1023b is contracted by the second sealing cover 1021b. In the present embodiment, the second vent 102b is communicated with the ventilation opening 30b for discharge, and therefore, the air containing the odor component flowing into the second vent 102b flows into the discharge portion 104 and is discharged to the outside by discharging the ventilation opening 30b.

[0181] If the push rod X is released after the air containing the odor component is discharged to the outside, the first sealing cover 1021a returns to the original position by the restoring force of the contracted first spring 1023a. In addition, the sealing cover 1031 returns to the original position by the restoring force of the spring 1033, and the second sealing cover 1021b returns to the original position by the restoring force of the second spring 1023b.

[0182] (4) Sample generation unit 34

[0183] The sample generating unit 34 generates a sample containing a chemical substance based on the identification result of the identification system unit. Specifically, the sample generating unit 34 may be similar to the sample generating unit described in "(6) sample generating unit 15" of the first embodiment, and as described below, the sample generating unit 34 may be constructed to include at least a cartridge retaining portion 31, a front receiving portion 32, and a back receiving portion 33.

[0184] (4-1) Cartridge Holding Unit 31

[0185] The cartridge holding portion 31 is a portion that holds one or more cartridges 10. The cartridge holding portion 31 includes, for example, a retaining portion in which one or more cartridges 10 are retained and which has a discharge hole 310 for discharging air containing odor components discharged from the cartridge 10, and a holding portion to which the holding portion is fitted to hold the cartridge 10. Note that the number of cartridges 10 held by the cartridge holding portion 31 is not particularly limited and can be freely set according to the purpose of the odor recognition system 3.

[0186] The form of the retention portion and the cartridge holding portion 31 is not particularly limited, and can be freely designed according to the form of the cartridge 10 to be held, etc. For example, the retention portion and the cartridge holding portion 31 can be formed to have a substantially rectangular parallelepiped shape, a substantially cylindrical shape, a substantially cubic shape, etc. The material forming the retention portion and the cartridge holding portion 31 is not particularly limited as long as the cartridge 10 can be held, and examples thereof include the same materials as those listed as the material of the impregnating agent.

[0187] (4-2) Front storage section 32

[0188] The front receiving portion 32 has at least one discharge hole 320, through which the air containing the odor components is discharged to the outside. Fig. 20 As shown, the discharge hole 320 may be provided in a portion of the front receiving portion 32, in which case the discharge hole may be communicated with the discharge hole of the retention portion.

[0189] In addition, the front receiving portion 32 may include a guide portion (not shown) that guides the air containing the odor component to the vicinity of the user's nose. The material forming the guide portion is not particularly limited, for example, paper (including recycled paper), wood, bamboo skin, plastic, coal, etc., or a combination of one or more of them can be used. In addition, part or all of the guide portion can be detachably formed, in which case, for example, the guide portion can be used once for each user.

[0190] (4-3) Back side storage section 33

[0191] The rear storage section 33 includes at least a drive mechanism section and a placement drive section.

[0192] The driving mechanism portion includes a driving mechanism housing portion, and is connected to the operating shaft and the main shaft 1022 in the material box 10 to drive them. The driving mechanism portion includes a push rod connected to the operating shaft and a shape memory alloy SMA of a thin wire as a driving source for driving the push rod inside the driving mechanism housing portion. The rear end of the push rod is fixed to a driving mechanism fixing portion arranged at the rear end inside the driving mechanism housing portion. The SMA sliding portion for folding and sliding the shape memory alloy SMA is arranged near the distal end of the push rod. In addition, the entire driving mechanism portion is fixed by a support member attached to the bottom of the driving mechanism housing portion, and wiring capable of supplying power is connected to the rear end of the shape memory alloy SMA located in the driving mechanism fixing portion. Through the telescoping of the shape memory alloy SMA, the push rod can move in the extension direction inside the driving mechanism housing portion.

[0193] The shape memory alloy SMA is folded into a U-shape at the SMA sliding portion provided near the distal end of the push rod, and passes through the interior of the push rod, and its two ends are fixed to the driving mechanism fixing portion located at the rear end of the push rod. In addition, the actuator as a driving source is not limited to the shape memory alloy SMA, and for example, it can be a linear moving mechanism that linearly moves the push rod, such as a motor, solenoid, linear sliding type, pneumatic (air pump type) or a small electromagnet. Here, the linear moving mechanism includes not only the case where one component moves in a linear direction, but also the case where some of the multiple components connected to each other move in a linear direction.

[0194] The configuration drive unit configures a specific cartridge 10 near the discharge hole 320 based on the recognition result of the recognition system unit 14. The configuration drive unit can be driven according to the form of the cartridge holding portion 31, etc., and can be driven to perform, for example, linear drive, XY axis drive, rotation drive, etc. The actuator as the drive source can be an actuator known in the art, and is not particularly limited in the present embodiment.

[0195] (5) Example of use of odor recognition system 3

[0196] The odor recognition system 3 according to the present technology can be used, for example, to exhaust odors in a limited target space. Specifically, the odor recognition system 3 is used for olfactory tests, olfactory training (including olfactory stimulation therapy) systems, etc. Note that in this specification, "olfactory training" is interpreted in a broad sense and can include exercises such as odor judgment tests, sommelier tests, and aromatherapy tests.

[0197] In addition, in recent years, it has been known that olfactory dysfunction occurs before cognitive deterioration in specific neurodegenerative diseases. For example, it is known that in Alzheimer's dementia, deposition of amyloid β protein or phosphorylated tau (tau) protein is observed in olfactory-related areas before hippocampal atrophy. Therefore, the odor recognition system 3 according to the present technology can also be used as a neurodegenerative disease prevention or treatment system.

[0198] In addition, the odor recognition system 3 according to the present technology can be used as an odor experience and measurement system. Specifically, for example, the odor recognition system 3 can be used for flavor simulation in food and beverage development. In addition, the odor recognition system 3 can be installed on cars, head-mounted displays, relaxation products such as neck pillows, eye pillows, sofas, and beds. In addition, the odor recognition system 3 can be used for bad breath inspection, body odor inspection, unpleasant odor investigation, odor countermeasures, etc.

[0199] For example, in the case where the odor recognition system 3 is installed on a car, an odor may be generated based on the instructions of the driver or passenger, or the position information of the car, the movement of the driver or passenger, biological signals, etc. may be detected, and an odor may be generated based on the detection results. For example, in the case where the odor recognition system 3 is installed on a head-mounted display, an odor may be generated in combination with an image presented on the display, or the movement of the user, biological signals, etc. may be detected, and an odor may be generated based on the detection results. In the case where the odor recognition system 3 is installed on a relaxation product, for example, an odor may be generated based on the instructions of the user, or the movement of the user, biological signals, etc. may be detected, and an odor may be generated based on the detection results.

[0200] In addition, the odor recognition system 3 according to the present technology can be used for the purpose of exhausting odors in a wide range of target spaces without limitation. Specifically, the odor recognition system 3 is used for an odor experience system installed on a product that attracts customers, such as a vending machine, a digital signage, and a robot. In the case where the odor recognition system 3 is installed on a product that attracts customers, for example, the actions, facial expressions, etc. of an unspecified number of users can be detected, and an odor can be generated based on the detection results.

[0201] Note that the present technology can also adopt the following configurations.

[0202] [1] An electrochemical sensor circuit comprising:

[0203] At least two electrochemical sensor units respectively connected to one AC signal generating unit;

[0204] at least one response signal output circuit that outputs a response signal from the electrochemical sensor unit; and

[0205] An identification system unit identifies a chemical substance in a sample based on the output from the response signal output circuit.

[0206] [2] The electrochemical sensor circuit according to [1], wherein at least a portion of the electrochemical sensor cells are arranged in an array.

[0207] [3] The electrochemical sensor circuit according to [2], wherein at least a portion of the response signal output circuit is configured in an array.

[0208] [4] The electrochemical sensor circuit according to any one of [1] to [3], wherein at least a portion of the response signal output circuit includes an IQ conversion circuit and an AD conversion circuit.

[0209] [5] The electrochemical sensor circuit according to any one of [1] to [4], wherein at least two or more of the electrochemical sensor units are respectively connected to one of the response signal output circuits.

[0210] [6] The electrochemical sensor circuit according to any one of [1] to [5], wherein the identification system unit identifies the chemical substance in the sample by checking the response signal of each electrochemical sensor unit against a database.

[0211] [7] The electrochemical sensor circuit according to any one of [1] to [6], wherein the identification system unit includes:

[0212] an impedance calculation device for calculating impedance based on an output result of the response signal output circuit;

[0213] a quantification device for quantifying the chemical substance in the sample based on the result of the impedance calculation device; and

[0214] Identification means identifies the chemical substance in the sample based on the result of the quantification means.

[0215] [8] The electrochemical sensor circuit according to any one of [1] to [7], further comprising a sample generating unit that generates a sample containing a chemical substance based on the recognition result of the recognition system unit.

[0216] [9] The electrochemical sensor circuit according to any one of [1] to [8], wherein the frequency of the AC signal generating unit is variable.

[0217]

[10] The electrochemical sensor circuit according to any one of [1] to [9], wherein the frequency of the AC signal generating unit is controlled based on the recognition result of the recognition system unit.

[0218]

[11] The electrochemical sensor circuit according to [9], wherein the response signal output circuit includes two or more switches, and the respective switches and the frequency of the AC signal generating unit are controlled according to the electrochemical sensor unit.

[0219]

[12] The electrochemical sensor circuit according to [2] or [3], wherein the AC signal generating unit having a different frequency is provided for each row or each column.

[0220]

[13] The electrochemical sensor circuit according to

[12] , wherein two or more electrochemical sensor units of the same type are configured, and

[0221] Two or more electrochemical sensor cells of the same type are measured at different frequencies.

[0222]

[14] The electrochemical sensor circuit according to any one of [1] to

[12] , further comprising a plurality of electrochemical sensor groups, each of which comprises at least two or more of the electrochemical sensor units, wherein

[0223] Measurements were performed at different frequencies for each electrochemical sensor group.

[0224]

[15] The electrochemical sensor circuit according to any one of [1] to

[14] , wherein the sample is in any one of a gaseous state, a liquid state, a semisolid state and a solid state.

[0225]

[16] An electrochemical sensor circuit for identifying odor components, comprising:

[0226] At least two electrochemical sensor units respectively connected to one AC signal generating unit;

[0227] at least one response signal output circuit that outputs a response signal from the electrochemical sensor unit; and

[0228] An identification system unit identifies the odor component in the sample based on the output from the response signal output circuit.

[0229]

[17] An odor recognition system, comprising:

[0230] An electrochemical sensor circuit for identifying odor components, comprising at least two or more electrochemical sensor units respectively connected to one AC signal generating unit, at least one or more response signal output circuits outputting response signals from the electrochemical sensor units, and an identification system unit for identifying odor components in a sample based on the output from the response signal output circuit; and

[0231] A material box includes an odor retaining portion for retaining odor components.

[0232]

[18] The odor recognition system according to

[17] further includes a sample generating unit, which generates a sample containing a chemical substance based on the recognition result of the recognition system unit.

[0233]

[19] The odor recognition system according to

[17] or

[18] , wherein the odor recognition system is used in any one or more systems selected from the group consisting of an olfactory test or olfactory training system, a neurodegenerative disease prevention or treatment system, and an odor experience or measurement system.

[0234] Reference numerals list

[0235] 1 Electrochemical sensor circuit

[0236] 11 AC signal generation unit

[0237] 12 Electrochemical sensor unit

[0238] 13. Response signal output circuit

[0239] 14 Identification system unit

[0240] 15 Sample generation unit

[0241] 2 Electrochemical sensor circuit for odor component identification

[0242] 3. Odor Recognition System

[0243] 10 Material box

[0244] 101 Odor Retention Department

[0245] 102 Ventilation

[0246] 103 Connection

[0247] 104 Discharge unit

[0248] 31. Cartridge holding unit

[0249] 32 Front Storage Section

[0250] 33 Back storage area

[0251] 34 Sample generation unit

Claims

1. An electrochemical sensor circuit, comprising: At least two electrochemical sensor units respectively connected to one AC signal generating unit; at least one response signal output circuit for outputting a response signal from the electrochemical sensor unit; and An identification system unit identifies a chemical substance in a sample based on the output from the response signal output circuit.

2. The electrochemical sensor circuit according to claim 1, wherein: At least a portion of the electrochemical sensor cells are arranged in an array.

3. The electrochemical sensor circuit according to claim 2, wherein: At least a portion of the response signal output circuits are arranged in an array.

4. The electrochemical sensor circuit according to claim 1, wherein: At least a part of the response signal output circuit includes an IQ conversion circuit and an AD conversion circuit.

5. The electrochemical sensor circuit according to claim 1, wherein: At least two of the electrochemical sensor units are respectively connected to one of the response signal output circuits.

6. The electrochemical sensor circuit according to claim 1, wherein: The identification system unit identifies the chemical substance in the sample by checking the response signal of each electrochemical sensor unit against a database.

7. The electrochemical sensor circuit according to claim 1, wherein: The identification system unit comprises: an impedance calculation device for calculating impedance based on an output result of the response signal output circuit; a quantification device for quantifying the chemical substance in the sample based on the result of the impedance calculation device; and Identification means identifies the chemical substance in the sample based on the result of the quantification means. 8 . The electrochemical sensor circuit according to claim 1 , further comprising a sample generating unit which generates a sample containing a chemical substance based on the recognition result of the recognition system unit.

9. The electrochemical sensor circuit according to claim 1, wherein: The frequency of the AC signal generating unit is variable.

10. The electrochemical sensor circuit according to claim 1, wherein: The frequency of the AC signal generating unit is controlled based on the recognition result of the recognition system unit.

11. The electrochemical sensor circuit according to claim 9, wherein: The response signal output circuit includes two or more switches, and controls the respective switches and the frequency of the AC signal generating unit according to the electrochemical sensor unit.

12. The electrochemical sensor circuit according to claim 2, wherein: The AC signal generating unit having a different frequency is provided for each row or each column.

13. The electrochemical sensor circuit according to claim 12, wherein: Two or more electrochemical sensor units of the same type are configured, and Two or more electrochemical sensor cells of the same type are measured at different frequencies.

14. The electrochemical sensor circuit according to claim 1, further comprising a plurality of electrochemical sensor groups, each of the electrochemical sensor groups comprising at least two or more of the electrochemical sensor units, wherein Measurements were performed at different frequencies for each electrochemical sensor group.

15. The electrochemical sensor circuit of claim 1, wherein: The sample is in any one of a gaseous state, a liquid state, a semi-solid state and a solid state.

16. An electrochemical sensor circuit for identifying odor components, comprising: At least two electrochemical sensor units respectively connected to one AC signal generating unit; at least one response signal output circuit for outputting a response signal from the electrochemical sensor unit; and An identification system unit identifies the odor component in the sample based on the output from the response signal output circuit.

17. An odor recognition system, comprising: An electrochemical sensor circuit for identifying odor components, comprising at least two or more electrochemical sensor units respectively connected to one AC signal generating unit, at least one or more response signal output circuits outputting response signals from the electrochemical sensor units, and an identification system unit for identifying odor components in a sample based on the output from the response signal output circuit; and A material box includes an odor retaining portion for retaining odor components.

18. The odor recognition system according to claim 17, further comprising a sample generation unit which generates a sample containing a chemical substance based on the recognition result of the recognition system unit.

19. The odor recognition system according to claim 17, wherein: The odor recognition system is used in any one or more systems selected from an olfactory test or olfactory training system, a neurodegenerative disease prevention or treatment system, and an odor experience or measurement system.

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