JP2013213741A - Sensor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an improved sensor device functioning as an alternative of a sensory organ.SOLUTION: A sensor device 1 includes: a first sensor 21 having high sensitivity to first components, and outputting current according to the density of the first components; first to third oscillating means 31-33 which are bust signal generating means 30 for outputting pulse signals becoming an exponential distribution repeating a dense state and a sparse state according to a first sensor signal; a second sensor 22 having high sensitivity to second components, and outputting current according to the density of the second components; fourth oscillating means 34 for outputting a periodical pulse signal according to a second sensor signal; OR means 40 for obtaining a logical sum; first integral firing means 51 integrating a signal from the OR means 40, and outputting a first sensing signal to reset an integral value when the integral value becomes a first threshold value or more; and second integral firing means 52 integrating the signal from the OR means 40, and outputting a second sensing signal to reset an integral value when the integral value becomes voltage of not less than a second threshold value higher than the first threshold value.

Description

  The present invention relates to a sensor device that detects and discriminates an object.

  A neural network based on synaptic connections captures an impulsive synchronized electric signal (synchronous signal) flowing from a sensory organ through a plurality of nerves as an important signal to be transmitted to the next stage. For example, the spatula shark is not known in detail, but by capturing the movement of plankton as a weak electric signal by the sensory organ, It is known to prey by determining the position of the bait.

  A sensory organ that generates a synchronization signal indicating that a target object has been detected in this way is an important organ for animals. However, if this sensory organ fails to function normally due to some disorder, it is not only inconvenient, but it may interfere with the maintenance of life depending on the sensory organ in which the disorder has occurred. Since an alternative means to replace a sensory organ in which a failure has occurred is also important for supplementing the function lost by the failure, a sensor device as an alternative means has been studied.

For example, Non-Patent Document 1 describes a sensor device that detects alcohol. This sensor device models a taste bud cell. The taste bud cells are composed of four types of cells from type I to type IV. As taste-sensitive cells, type II and type III taste cells are provided.
The chemical sensor described in Non-Patent Document 1 includes 32 sensors (chemical sensors) that detect alcohol, and 32 oscillators (Random pulse generator) that oscillate a pulse signal at a predetermined frequency in accordance with the output from the sensor. And two ignition cells (stochastic synchronizer) for outputting a signal of a frequency corresponding to the concentration, as well as outputting a synchronization signal if the alcohol concentration is a predetermined level or more based on a signal from the oscillator ( (See FIG. 13). The chemical sensor described in Non-Patent Document 1 is modeled by making the sensor correspond to the receptor membrane, the oscillator corresponding to the type II taste cell, and the firing cell corresponding to the type III taste cell.

Jun Igarashi, Katsumi Tateno, 4 others, "A Chemical Sensor Array Inspired by Mouse Taste Buds", "Brain-Inspired Information Technology", SPRINGER, 2010, Volume 266/2010, p. 159-164

  However, the sensor device described in Non-Patent Document 1 indicates that alcohol is detected because the output signal of the ignition cell is synchronized, and the alcohol concentration is known according to the period of the synchronization signal. Can only be detected. As a sensor device, it is desired to increase the components that can be detected by further improvement.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an improved sensor device that replaces a sensory organ.

  The sensor device of the present invention is highly sensitive to the first component, and repeats a dense state and a sparse state in response to a first sensor signal from the first sensor that outputs a current corresponding to the concentration of the first component. Burst signal generating means for outputting a signal and high sensitivity to the second component, and outputting a periodic pulse signal according to the second sensor signal from the second sensor that outputs a current according to the concentration of the second component Oscillating means, OR means for logically summing the output signals of the burst signal generating means and the oscillating means, and integrating the signal from the OR means, and when the integrated value is equal to or greater than the first threshold value, A first integral ignition means for outputting one sensing signal to reset an integral value; and a signal from the OR means is integrated, and when the integral value becomes a voltage equal to or higher than a second threshold value higher than the first threshold value. The second sensing signal is output And a second integral firing means for resetting the integral value, receiving a pulse signal in a dense state from the burst signal generating means, and outputting the first sensing signal and the second sensing signal as synchronization signals, It has a sensor unit including an integral firing means for receiving a periodic pulse signal from the oscillating means and outputting the first sensing signal and the second sensing signal as asynchronous signals.

  According to the sensor device of the present invention, first, when the first sensor detects the first component, the burst signal generating means outputs a pulse signal that repeats the dense state and the sparse state, and the second component detects the second component. Then, the oscillating means outputs a periodic pulse signal. Next, the OR means takes a logical sum of the burst signal generating means and the oscillating means. If the signal from the OR means is a pulse signal in a sparse / dense state, in the integral firing means, the first integral firing means and the second integral firing means receive the pulse signal in the dense state and integrate and integrate it. Since the received signal sequentially exceeds the first threshold value and the second threshold value, a synchronized signal is output. If the signal from the OR means is a periodic pulse signal, the first integral firing means and the second integral firing means integrate the pulse signal, but the asynchronous signal is different from the difference between the first threshold value and the second threshold value. Is output. Therefore, a synchronous signal is output when the first component is used, and an asynchronous signal is output when the second component is used. The concentration of the first component or the second component can be determined based on the frequency of the output signal.

  The burst signal generating means can be formed of three or more oscillating means for outputting a signal that becomes a pulse signal that repeats a dense state and a sparse state due to a difference in oscillation frequency when ORed by the OR means.

  The oscillation means models type II taste cells of taste bud cells and has class 2 excitability characteristics, and the first integral firing means and the second integral firing means are type III taste buds of miso cells. It can be a model of a cell.

  The OR means includes a light emitting means for emitting an optical signal having a light amount corresponding to a pulse signal from the burst signal generating means and the oscillating means, and an electric power corresponding to the intensity obtained by adding the optical signals from the light emitting elements in the air. When formed by the light receiving means for converting to a signal, even if there is a distance between the light emitting means and the light receiving means, a logical sum can be obtained without providing a transmission line or an OR gate.

  The sensor unit that operates based on the first sensor signal and the second sensor signal is a first sensor unit. Instead of the first sensor signal, the sensitivity to the third component is high, and the concentration of the third component is increased. Assuming that the second sensor unit is a third sensor signal from a third sensor that outputs a corresponding current and the sensor unit that operates based on the second sensor signal is provided with two sensor units, Seven types of substances having two components can be identified.

  Since the sensor device of the present invention outputs a synchronous signal when it is the first component and outputs an asynchronous signal when it is the second component, each concentration can be detected by the frequency of the output signal. An improved sensor device can be obtained.

It is a block diagram which shows the structure of the sensor apparatus which concerns on Embodiment 1 of this invention. It is a circuit diagram which shows the 1st oscillation means-the 4th oscillation means of the sensor apparatus shown in FIG. 6 is a graph showing a relationship between a current signal output from the first sensor or the second sensor of the sensor device shown in FIG. 1 and a frequency oscillated by the first to fourth oscillating means. It is a figure for demonstrating operation | movement of the sensor apparatus shown in FIG. 1, and is a wave form diagram which shows the case where the density | concentration of a 1st component is low. It is a figure for demonstrating operation | movement of the sensor apparatus shown in FIG. 1, and is a wave form diagram which shows the case where the density | concentration of a 1st component is high. It is a graph which shows the degree of synchronization of an output signal from the 1st integral ignition means and the 2nd integral ignition means outputted according to the current signal from the 1st sensor, and the output frequency. It is a figure for demonstrating operation | movement of the sensor apparatus shown in FIG. 1, and is a wave form diagram which shows the case where the density | concentration of a 2nd component is low. It is a figure for demonstrating operation | movement of the sensor apparatus shown in FIG. 1, and is a wave form diagram which shows the case where the density | concentration of a 2nd component is high. It is a graph which shows the degree of a synchronization of the output signal from the 1st integral ignition means and the 2nd integral ignition means output according to the current signal from a 2nd sensor, and an output frequency. It is a block diagram which shows the structure of the sensor apparatus which concerns on Embodiment 2 of this invention. It is a block diagram which shows the structure of the sensor apparatus which concerns on Embodiment 3 of this invention. It is a figure which shows an output signal when a substance (a)-substance (g) is detected by the 1st sensor-a 3rd sensor. It is a figure for demonstrating the structure of the conventional sensor apparatus.

(Embodiment 1)
A sensor device according to an embodiment of the present invention will be described with reference to the drawings.
The sensor device 10 shown in FIG. 1 can detect two types of components and measure their concentrations. The sensor device 10 includes a first sensor 21, a second sensor 22, a sensor unit S, and a determination unit 60.
The sensor unit S is a first oscillation means 31, a second oscillation means 32, a third oscillation means 33 that constitute the burst signal generation means 30, and a fourth oscillation that is an oscillation means that makes a pair with the burst signal generation means 30. Means 34, OR means 40, first integral firing means 51, and second integral firing means 52 are provided.

  The first sensor 21 is highly sensitive to the first component, and outputs a current signal corresponding to the concentration of the first component to each of the first oscillating means 31 to the third oscillating means 33 as a first sensor signal. The second sensor 22 is highly sensitive to the second component, and outputs a current signal corresponding to the concentration of the second component to the fourth oscillating means 34 as a second sensor signal. The outputs of the first sensor 21 and the second sensor 22 may be directly input to the first oscillating means 31 to the fourth oscillating means 34, or amplified by the amplifying means to adjust the output current for the first output. You may make it input into the oscillation means 31-the 4th oscillation means 34. FIG.

  The burst signal generating means 30 (first oscillating means 31, second oscillating means 32, and third oscillating means 33) is periodically changed according to the current signal when the current signal from the first sensor 21 exceeds a threshold value. This is an oscillator that outputs various pulses. The pulse signals generated here are superimposed by the OR means 40, and the frequency of occurrence of pulses with a short period is high, and the pulse signal has a distribution in which the frequency of occurrence decreases as the period becomes longer (hereinafter referred to as a burst signal). Is output so that the pulse signal repeats a dense state and a sparse state.

  The first oscillating means 31 to the third oscillating means 33 may be any one that outputs a pulse signal whose frequency is changed according to the current signal from the first sensor 21. In the present embodiment, the integral firing means 50 is synchronized by an exponential distribution burst stimulus. However, the burst signal does not need to have a complete exponential distribution, and the burst signal generating means 30 may generate a pulse pattern having a density similar to an exponential distribution.

  The fourth oscillating means 34 is an oscillator that outputs a periodic pulse signal as a voltage signal in accordance with the current signal from the second sensor. The first oscillating means 31 to the fourth oscillating means 34 are set to have different oscillation frequencies even when the input current signals have the same current value.

The first oscillating means 31 to the fourth oscillating means 34 are modeled on type II taste cells and have class 2 excitability characteristics. The first oscillating means 31 to the fourth oscillating means 34 modeling the type II taste cells can be, for example, the equivalent circuit shown in FIG. The equivalent circuit shown in FIG. 2 can be expressed by equations (1) to (5). However, i is 1, 2, 3, and 4 and shows the 1st oscillation means 31-the 4th oscillation means 34, respectively. _gl is a random conductance value set by leak conductance. In the present embodiment, an average value of 0.6 mS / cm ² and a standard deviation of 0.01 mS / cm ² are given. With the random number value of _gl , the first oscillating means 31 to the fourth oscillating means 34 oscillate at different frequencies even with the same sensor current. I _dc is the current value of the current signal output from the first sensor 21 and the second sensor 22. As for the constant, for example, Cm is a capacitor, which indicates the capacity of the cell membrane, and is 1 μF / cm ² . e _Na is a direct current power source, which indicates the equilibrium potential of sodium ions, and is 60 mV. _el is a DC power source, which indicates the equilibrium potential of other ions, and is set to -60 mV.
Indicates the maximum conductance of sodium ions, and is 15 mS / cm ² . τ _amp is a time constant and is 740 ms.

The first oscillating means 31 to the fourth oscillating means 34 determine the oscillating frequency based on the current signal from the first sensor 21 and the second sensor 22 when the first component and the second component having a predetermined concentration are detected.
FIG. 3 shows the relationship between the current signals from the first sensor 21 and the second sensor 22 and the frequencies oscillated by the first oscillating means 31 to the fourth oscillating means 34 when g _l = 0.6 mS / cm ² .
According to the graph shown in FIG. 3, the first oscillating means 31 to the fourth oscillating means 34 are 0.61 Hz (at Idc = 1.47 μA / cm ² ) to 24.6 Hz (at Idc = 9.57 μA / cm ^2). ) Is set to oscillate.

In addition, since the 1st oscillation means 31-the 4th oscillation means 34 modeled the type II taste cell, the current signal from the 1st sensor 21 and the 2nd sensor 22 is handled as the electric current with respect to a cell membrane. Therefore, the current values from the first sensor 21 and the second sensor 22 use “A / cm ² ” as the current per 1 cm ^{2 of} cell membrane.

  The OR means 40 logically sums voltage signals that are output signals from the first oscillating means 31 to the fourth oscillating means 34. The OR means 40 can be a four-input OR gate that takes a logical sum. It is desirable that the OR means 40 performs waveform shaping because noise and the like can be removed.

  The first integral firing means 51 has a function of integrating the voltage signal from the OR means 40, and outputting the first sensing signal and resetting the integral value when the integral value is equal to or greater than the first threshold value. . The second integral firing means 52 integrates the signal from the OR means 40, and outputs a second sensing signal when the integral value becomes a voltage equal to or higher than the second threshold value which is higher than the first threshold value. It has a reset function.

The first integral firing means 51 and the second integral firing means 52 are obtained by modeling type III taste cells, and have response characteristics similar to those of the integral firing model generally known as a mathematical model of nerve cells. Yes. The first integral firing means 51 and the second integral firing means 52 can be, for example, a circuit represented by Expression (6). However, j is 1, 2, and indicates the first integral firing means 51 and the second integral firing means 52, respectively. s (t) is a pulse signal input to the first integral firing means 51 and the second integral firing means 52. ε is a time constant, 20 ms, κ indicates a rotation start position (= sin ⁻¹ (1 / κ)), and in the first integral firing means 51, κ ₁ = 1.1 (corresponding to the first threshold voltage). In the second integral firing means 52, κ ₂ = 1.12 (corresponding to the second threshold voltage). Therefore, the first threshold voltage <the second threshold voltage. ψ is a cell membrane variable and is reset to 0 when the rotation reaches or exceeds 2π.

  The determination unit 60 has a function of determining the degree of synchronization between the first sensing signal and the second sensing signal output from the output A and the output B, and determining whether the first component or the second component. The determination unit 60 includes a display unit such as a display and a notification unit such as a voice and a buzzer, and can notify the operator of the determination result. As an alternative to the sensory organ, the sensor device uses signals (output A, output B) from the first integral firing means 51 and the second integral firing means 52 and is input to the neural network, but is used alone. In the case of an independent type (stand-alone type) sensor device, the determination means 60 determines whether one of the first component and the second component is detected.

The operation and use state of the sensor device according to Embodiment 1 of the present invention configured as described above will be described with reference to the drawings.
In the present embodiment, a current mirror circuit uses a current signal when the first sensor 21 detects a first component with a predetermined concentration and a current signal when the second sensor 22 detects a second component with a predetermined concentration. It is adjusted by a current amplifier.

First, the case where the detection target is the first component and the concentration is low will be described. When the first sensor 21 detects the first component having a low concentration, each of the three first sensors 21 outputs a current signal (first sensor signal) having a current value based on the concentration. For example, the current signal when the concentration of the first component is low is ² μA / cm ² . At this time, the second sensor 22 does not output a current signal (second sensor signal) because the sensitivity to the first component is low.

  By outputting a current signal from the first sensor 21, each of the first oscillating means 31 to the third oscillating means 33 outputs a periodic pulse signal. However, since the concentration of the first component is low, the frequency is low. Further, since no current signal is output from the second sensor 22, no pulse signal is output from the fourth oscillating means 34.

  The pulse signals from the first oscillating means 31 to the fourth oscillating means 34 are ORed by the OR means 40. Then, a burst signal from the first oscillating means 31 to the third oscillating means 33 is output from the OR means 40.

  The first integral firing means 51 and the second integral firing means 52 integrate the current signal according to the equation (6), and if the current signal becomes higher than the first threshold, the first integral firing means 51 fires and serves as the first sensing signal. When the output is output A and becomes higher than the second threshold value, the second integral firing means 52 fires and outputs as the second sensing signal by the output B. Since the burst signal from the OR means 40 is input to the first integral firing means 51 and the second integral firing means 52, even if the first threshold value and the second threshold value are different, the timing is almost the same. A first sensing signal and a second sensing signal are output. As shown in FIG. 4, the first sensing signal and the second sensing signal output in this way are output as impulse signals at a synchronized timing.

Next, a case where the detection target is the first component and the concentration is high will be described. When the first sensor 21 detects a first component having a high concentration, the three first sensors 21 output current signals (first sensor signals) having current values based on the concentrations. For example, the current signal when the concentration of the first component is high is 9 μA / cm ² . At this time, the second sensor 22 does not output a current signal (second sensor signal) because the sensitivity to the first component is low.

  By outputting a current signal from the first sensor 21, the first oscillating means 31 to the third oscillating means 33 each output a periodic pulse signal as shown in FIG. Output a burst signal, but since the concentration of the first component is high, each output signal has a biased high frequency waveform. Further, since no current signal is output from the second sensor 22, no pulse signal is output from the fourth oscillating means 34.

The OR of the pulse signals from the first oscillating means 31 to the fourth oscillating means 34 is obtained by the OR means 40, but the concentration from the OR means 40 by the outputs from the first oscillating means 31 to the third oscillating means 33. A pulse signal in which the impulse is irregularly repeated in a dense state and a sparse state is output at a higher frequency than when the signal is low. At this time, since the OR means 40 shapes the waveform, the output signal is a rectangular pulse wave.
The first integral firing means 51 and the second integral firing means 52 output the first sensing signal and the second sensing signal in the same manner as when the concentration of the first component is low, but are output from the OR means 40. Since the average frequency of the burst signal is high, the first sensing signal and the second sensing signal are synchronization signals having a high frequency.

Thus, the sensor device 10 can output a synchronization signal indicating that the first component has been detected. A graph showing the degree of synchronization of the synchronization signal is shown in FIG.
The upper part of FIG. 6 is a graph with the output current from the first sensor 21 on the horizontal axis (x axis) and the evaluation value of the degree of synchronization on the vertical axis (y axis). 6 is a graph with the output current from the first sensor 21 on the horizontal axis (x axis) and the output frequency of the first integral firing means 51 on the vertical axis (y axis).
The evaluation value of the degree of synchronization was calculated by equation (7). However, Δφ indicates the phase difference between the output signals of the first integral firing means 51 and the second integral firing means 52. <> Indicates a time average. As an evaluation, the closer the γ value is to 1, the higher the degree of synchronization.

As can be seen from the graph shown in FIG. 6, in the sensor device 10, the first sensor 21 outputs a ² μA / cm ² concentration of the first component, and the synchronization signal with a frequency of about 2 Hz and a γ value of 0.7 It is starting to output a signal that can be evaluated. When the first sensor 21 changes the concentration of the first component that outputs ² μA / cm ² to 9 μA / cm ² , the output frequency of the first integral firing means 51 gradually increases from about 1 Hz to about 17 Hz. Thus, it can be seen that a signal having a γ value between about 0.6 and about 0.8 that can be evaluated as a synchronization signal is output.

  The determination unit 60 has a threshold value for the γ value. For example, if the γ value is 0.6 or more, the determination unit 60 determines that the signal is a synchronization signal and notifies that the first component has been detected. Further, the concentration can be determined from the frequency.

Next, a case where the detection target is the second component and the concentration is low will be described. When the second sensor 22 detects the second component having a low concentration, the second sensor 22 outputs a current signal having a current value based on the concentration. For example, the value of the current signal when the concentration of the second component is low is 7 μA / cm ² . At this time, the first sensor 21 does not output a current signal because the sensitivity to the second component is low.

  When the current signal is output from the second sensor 22, the fourth oscillating means 34 outputs a periodic pulse signal as shown in FIG. 7, but the concentration of the second component is low. Although it is higher than the frequency when the density is low (see FIG. 4), it oscillates at a lower frequency than when the density described later is high. In addition, since no current signal is output from the first sensor 21, no pulse signal is output from the first oscillating means 31 to the third oscillating means 33.

  The OR signal is obtained by ORing the pulse signals from the first oscillating unit 31 to the fourth oscillating unit 34. At this time, since the OR unit 40 shapes the waveform, the output signal is a rectangular pulse wave. .

The first integral firing means 51 and the second integral firing means 52 output the first sensing signal and the second sensing signal in the same manner as the first component, but the frequency of the signal output from the OR means 40 Therefore, the first sensing signal and the second sensing signal are signals having a low frequency.
At this time, since the signal output from the OR means 40 is periodic, the first integral firing means 51 and the second integral firing means 52 ignite (output the first sensing signal and the second sensing signal). Since the threshold value at the time differs between the first threshold value and the second threshold value, the first sensing signal and the second sensing signal (pulse signal) are output at a slightly shifted timing. Therefore, the first sensing signal and the second sensing signal are output as asynchronous signals without being synchronized.

Next, a case where the detection target is the second component and the concentration is high will be described. When the second sensor 22 detects the second component having a high concentration, the second sensor 22 outputs a current signal having a current value based on the concentration. For example, the current signal when the concentration of the second component is low is 9 μA / cm ² . At this time, the first sensor 21 does not output a current signal because the sensitivity to the second component is low.

  When the current signal is output from the second sensor 22, the fourth oscillating means 34 outputs a periodic pulse signal as shown in FIG. 8, but when the concentration is low because the concentration of the second component is high. Higher frequency (see FIG. 7). In addition, since no current signal is output from the first sensor 21, no pulse signal is output from the first oscillating means 31 to the third oscillating means 33. The pulse signals from the first oscillating means 31 to the fourth oscillating means 34 are ORed by the OR means 40.

  The first integral firing means 51 and the second integral firing means 52 output the first sensing signal and the second sensing signal in the same manner as when the concentration is low, but the frequency of the signal output from the OR means 40 is high. Since it is periodic, the first sensing signal and the second sensing signal are output as asynchronous signals having a high frequency. A graph showing the degree of this asynchronous signal is shown in FIG.

As can be seen from the graph shown in FIG. 9, the sensor device 10, between the current value of the current signal indicative of the concentration of the second component from the second sensor 22 is 0μA / cm ² ~5μA / cm ^2, the first The output frequency of the integral firing means 51 hardly increases and gradually increases from 5 μA / cm ² . The γ value is almost close to 0, and it can be seen that the first integral firing means 51 and the second integral firing means 52 output signals that cannot be evaluated as synchronization signals.

  The determination unit 60 determines that the outputs A and B from the first integral firing unit 51 and the second integral firing unit 52 are smaller than the threshold value for the γ value, and notifies that the second component has been detected. Further, the concentration can be determined from the frequency.

  As described above, the sensor device 10 outputs the synchronization signal by the output A and the output B when the first component is detected, and outputs the asynchronous signal when the second component is detected. Since the detection can be performed by the frequency of B, an improved sensor device can be substituted for the sensory organ.

In the present embodiment, the pulse signal (burst signal) output from the OR means 40 has an exponential distribution, but it may be a gamma distribution (k = 1 to 5) shown in Expression (8). . T is the length of the OFF period of the pulse signal input from the OR means 40 to the integral firing means 50. θ is a parameter that determines the average value of T. The burst signal generating means 30 includes three first oscillator 31 to third oscillator 33. If each oscillator can generate a gamma-distributed pulse signal, three or less burst signal generating means 30 are provided. You may comprise by the oscillator of.

(Embodiment 2)
A sensor device according to an embodiment of the present invention will be described with reference to FIG. In FIG. 10, the same reference numerals as those in FIG.
The sensor device 10a shown in FIG. 10 is characterized in that the OR means 40a is composed of a light emitting means 41 and a light receiving means 42.

The light emitting means 41 emits an optical signal having a light amount corresponding to the pulse signals from the first oscillating means 31 to the fourth oscillating means 34. The light emitting means 41 may be an LED (Light Emitting Diode), a laser, a light bulb that emits light using a filament, or the like.
The light receiving means 42 converts the optical signal from the light emitting means 41 into an electric signal corresponding to the intensity combined in the air, and outputs it to the first integral firing means 51 and the second integral firing means 52. The light receiving means 42 can be a photodiode.

By configuring the OR means 40a with the light emitting means 41 and the light receiving means 42, even if there is a distance between the light emitting means 41 and the light receiving means 42, a logical sum is obtained without providing a transmission line or an OR gate. be able to.
Even when the burst signal generating means 30 is constituted by three or more oscillating means, the light emitting means 41 increases in accordance with the increased oscillating means, but the OR gate is unnecessary and the light receiving means 42 does not increase.

(Embodiment 3)
A sensor device according to Embodiment 3 of the present invention will be described with reference to FIGS. In FIG. 11, components having the same functions as those in FIG.
The sensor device according to the present embodiment can distinguish seven types of substances (substance (a) to substance (g)) by providing sensors that detect three types of components.

As shown in FIG. 11, the sensor device 10b includes two sensor units S (first sensor unit S1, second sensor unit S2). The first sensor unit S1 and the second sensor unit S2 have the same configuration as the sensor unit S shown in FIG.
The first sensor unit S <b> 1 is operated by the first sensor signal from the first sensor 21 and the second sensor signal from the second sensor 22. However, instead of the first sensor 21, the second sensor unit S2 has a high sensitivity to the third component, and the third sensor signal from the third sensor 23 that outputs a current according to the concentration of the third component, It operates by the second sensor signal from the two sensors.

Here, the first sensor 21 to the third sensor 23 and the discrimination of the substance (g) from the substance (a) by these sensors will be described with reference to FIG.
FIG. 12 schematically shows the first sensor 21 to the third sensor 23 as receiving films. In addition, the substances (a) to (g) represent the components that can be received by the first sensor 21 to the third sensor 23 serving as receiving films as convex portions, and are combinations of two components.

  For example, if it is a substance (a), the 1st sensor 21 of 1st sensor unit S1 and the 3rd sensor 23 of 2nd sensor unit S2 will output the electric current signal according to a density | concentration. If it is a substance (d), the 2nd sensor 22 of the 1st sensor unit S1, the 3rd sensor 23 of the 2nd sensor unit S2, and the 2nd sensor 22 will output the current signal according to concentration.

  Therefore, if the substance is (a), the first sensor 21 of the first sensor unit S1 outputs a current signal, which is the first sensor signal, to the first oscillating means 31 to the third oscillating means 33. A synchronization signal is output from the unit S1. Further, since the third sensor 23 of the second sensor unit S2 outputs a current signal that is a third sensor signal to the first oscillating means 31 to the third oscillating means 33, a synchronization signal is also output from the second sensor unit S2. Is done.

  In addition, if it is the substance (d), the second sensor 22 of the first sensor unit S1 outputs a current signal, which is the second sensor signal, to the fourth oscillating means 34, so that the asynchronous signal is output from the first sensor unit S1. Is output. The third sensor 23 of the second sensor unit S2 outputs a current signal that is a third sensor signal to the first oscillating means 31 to the third oscillating means 33. At this time, the second sensor 23 of the second sensor unit S2 also outputs a current signal, which is the second sensor signal, to the fourth oscillating means 34. However, since the OR is taken by the OR means 40, the second sensor unit S2 Outputs a synchronization signal.

  The determination means 60a can detect the substance (g) from the substance (a) to the substance (g) according to the table of FIG. The sensor device 10b can distinguish seven types of substances (a) to (g) by providing sensors (first sensor 21 to third sensor 23) that detect three types of components.

  The present invention is suitable for substituting various sensory organs or as a partial circuit of an independent sensor device.

1, 10a, 10b Sensor device S Sensor unit S1 First sensor unit S2 Second sensor unit 21 First sensor 22 Second sensor 23 Third sensor 30 Burst signal generation means 31 First oscillation means 32 Second oscillation means 33 Third Oscillating means 34 Fourth oscillating means 40, 40a OR means 50 Integral firing means 51 First integral firing means 52 Second integral firing means 60, 60a Determination means

Claims (5)

Burst signal generation that outputs a pulse signal that repeats a dense state and a sparse state in response to a first sensor signal from a first sensor that is highly sensitive to the first component and outputs a current corresponding to the concentration of the first component Means,
Oscillating means for outputting a periodic pulse signal in response to a second sensor signal from a second sensor that is highly sensitive to the second component and outputs a current corresponding to the concentration of the second component;
OR means for ORing the output signals of the burst signal generating means and the oscillating means;
The signal from the OR means is integrated, and when the integrated value becomes equal to or greater than the first threshold value, the first integrated ignition means for outputting the first sensing signal and resetting the integrated value, and the signal from the OR means When the integration value becomes a voltage equal to or higher than a second threshold value higher than the first threshold value, the burst signal is constituted by a second integration ignition means that outputs a second sensing signal and resets the integration value. In response to the dense pulse signal from the generating means, the first sensing signal and the second sensing signal are output as synchronization signals, and the first sensing signal and the first sensing signal are received in response to the periodic pulse signal from the oscillating means. A sensor device comprising: a sensor unit including an integral ignition means for outputting two sensing signals as asynchronous signals.   The burst signal generating means is formed of three or more oscillating means for outputting a signal that becomes a pulse signal that repeats a dense state and a sparse state due to a difference in oscillation frequency when ORed by the OR means. The sensor device according to 1. The oscillation means models a taste bud cell type II taste cell and has class 2 excitability characteristics,
3. The sensor device according to claim 2, wherein the first integral firing means and the second integral firing means are obtained by modeling type III taste cells of taste bud cells.   The OR means includes a light emitting means for emitting an optical signal having a light amount corresponding to a pulse signal from the burst signal generating means and the oscillating means, and an electric power corresponding to the intensity obtained by adding the optical signals from the light emitting elements in the air. The sensor device according to claim 1, wherein the sensor device is formed by a light receiving unit that converts the signal into a signal. The sensor unit that operates according to the first sensor signal and the second sensor signal is a first sensor unit,
Instead of the first sensor signal, the sensitivity to the third component is high, and the third sensor signal from the third sensor that outputs a current according to the concentration of the third component and the second sensor signal operate. The sensor device according to any one of claims 1 to 4, wherein the sensor unit is a second sensor unit and includes two sensor units.