JP2022131775A - Detection device, detection method, and program - Google Patents

Abstract

To provide a detection device capable of detecting UV-C rays using a simple configuration.SOLUTION: A detection device is provided, comprising a sensor having resistance that changes with irradiation of ultraviolet rays of at least one wavelength in a wavelength range corresponding to UV-C, and a detection circuit configured to detect the resistance of the sensor that changes a bias voltage according to the resistance in the form of voltage.SELECTED DRAWING: Figure 9

Description

The present invention relates to a detection device, detection method and program.

For the purpose of sterilizing, removing, and sterilizing viruses and fungi, ultraviolet rays called UV-C, which are particularly effective for sterilization, disinfection, and sterilization, are used.
Patent Document 1 discloses, as a related technique, a technique for measuring the intensity of ultraviolet rays.

JP 2005-069843 A

By the way, UV-C has a great bactericidal effect, but on the other hand, if a person is exposed to UV-C, the DNA of cells may be destroyed. Therefore, there is a demand for a technique capable of detecting UV-C with an apparatus having a simple configuration.

An object of the present invention is to provide a detection device, a detection method, and a program that can solve the above problems.

In order to achieve the above object, the present invention provides a sensor whose resistance value changes when irradiated with ultraviolet rays having at least one wavelength in a wavelength band indicating UV-C, and a bias sensor according to the resistance value of the sensor. and a detection circuit that changes the voltage and detects the resistance value as a voltage value.

Further, the present invention is characterized by: changing a bias voltage according to a resistance value of a sensor whose resistance value changes when irradiated with ultraviolet rays having at least one wavelength in a wavelength band indicating UV-C; is detected as a voltage value.

Further, the present invention provides a computer that changes a bias voltage according to a resistance value of a sensor that changes its resistance value when irradiated with ultraviolet rays having at least one wavelength in a wavelength band indicating UV-C; and detecting the resistance value as a voltage value.

According to the present invention, UV-C can be detected with a simple configuration.

It is a figure showing an example of composition of a detection system by one embodiment of the present invention. It is a figure which shows an example of a structure of the irradiation apparatus by one Embodiment of this invention. It is a figure showing an example of composition of a light-emitting device by one embodiment of the present invention. It is a figure which shows an example of a structure of the control apparatus by one Embodiment of this invention. It is a figure which shows an example of a structure of the detection apparatus by one Embodiment of this invention. It is a figure which shows an example of a structure of the processing apparatus by one Embodiment of this invention. It is a figure for demonstrating the process which the processing apparatus by one Embodiment of this invention performs. FIG. 3 illustrates an example of a processing flow of a detection system according to an embodiment of the invention; It is a figure which shows the processing apparatus of the minimum structure of this invention. It is a figure which shows the processing flow of the processing apparatus of the minimum structure of this invention. 1 is a schematic block diagram showing a configuration of a computer according to at least one embodiment; FIG.

<Embodiment>
A detection system 1 according to an embodiment of the present invention will be described.
A detection system 1 according to an embodiment of the present invention includes an irradiation device 10, a detection device 20, and a notification device 30, as shown in FIG. The detection system 1 is a system in which the UV-C irradiated by the irradiation device 10 is detected by the detection device 20 .

The irradiation device 10 is a device for irradiating UV (UltraViolet)-C. Examples of UV-C include ultraviolet light that includes at least one of the wavelength bands from 100 nm to 280 nm. The irradiation device 10 includes a light emitting device 101 and a control device 102, as shown in FIG.

The light-emitting device 101 includes a light-emitting section 1011 (an example of light-emitting means), a communication section 1012, and a drive section 1013, as shown in FIG. The light emitting unit 1011 is, for example, an LED (Light Emitting Diode). A communication unit 1012 communicates with the control device 102 . Driving unit 1013 drives light emitting unit 1011 based on a control signal received from control device 102 via communication unit 1012 . The light emitting unit 1011 is driven by the driving unit 1013 to emit UV-C.

The control device 102 is a device that controls the light emitting device 101 . The control device 102 is, for example, a server. The control device 102 includes a communication unit 1021, a reception unit 1022, a control unit 1023, and a storage unit 1024, as shown in FIG.

Communication unit 1021 communicates with light emitting device 101 and detection device 20 . Receiving unit 1022 determines whether or not it has received a request to cause light emitting unit 1011 to emit light. For example, the receiving unit 1022 causes the light-emitting unit 1011 to emit light when the user operates a button that causes the light-emitting unit 1011 to emit light and receives a signal indicating that the light-emitting unit 1011 should emit light. It is determined that it has been accepted. If receiving unit 1022 does not receive the signal, receiving unit 1022 determines that it has not received the light emission of light emitting unit 1011 .

Control unit 1023 controls light emitting device 101 based on the determination result of receiving unit 1022 . Specifically, the control unit 1023 controls to irradiate the UV-C from the light emitting unit 1011 or control not to irradiate the UV-C from the light emitting unit 1011 by transmitting a control signal to the driving unit 1013. 1013. When the control unit 1023 starts controlling UV-C irradiation, the communication unit 1021 continues UV-C until the communication unit 1021 receives a stop signal together with the identification information from all the detection devices 20 that have received identification information described later from the detection device 20. Control not to irradiate C is not performed.

The sterilization, disinfection, and sterilization effects of UV-C are determined by the emission intensity and emission time of UV-C. Specifically, the higher the UV-C emission intensity, the greater the sterilization, sterilization, and sterilization effects. In addition, the longer the UV-C emission time, the greater the sterilization, sterilization, and sterilization effects. For example, when the vertical axis is the UV-C emission intensity and the horizontal axis is the emission time, the sterilization, disinfection, and sterilization effects by UV-C are the area surrounded by the emission intensity and the emission time (i.e., Accumulated time by unit emission intensity) can be evaluated.

Further, the control unit 1023 notifies the information indicated by the notification signal based on the notification signal, which will be described later, transmitted from the detecting device 20 . For example, the control unit 1023 executes a dedicated application program and notifies on a display (not shown) that aging deterioration or disconnection of the light emitting unit 1011 indicated by a notification signal has occurred.

The storage unit 1024 stores information necessary for various processes performed by the control device 102 . For example, the storage unit 1024 stores a log signal indicating the detection result of UV-C by the detection device 20 .

The detection device 20 is a device that detects UV-C emitted by the irradiation device 10 . The detection device 20 includes a sensor 201, a detection circuit 202, a processing device 203, a D/A conversion device 204, a wireless module 205, and a connector 206, as shown in FIG.

Sensor 201 detects UV-C. Specifically, when the sensor 201 is irradiated with UV-C, the resistance value changes. For example, the resistance value of the sensor 201 decreases as the emitted UV-C intensity increases. The resistance value of the sensor 201 varies, for example, in the range of several tens of kiloohms to several tens of Gohms, depending on the intensity of the emitted UV-C.

The detection circuit 202 is a circuit that detects the resistance value of the sensor 201 as a voltage. The detection circuit 202, as shown in FIG. 5, includes an operational amplifier (hereinafter referred to as an operational amplifier) 2021, resistors 2022a and 2022b, and capacitors 2023a and 2023b.

The operational amplifier 2021 has an inverting terminal (a terminal indicated by a minus sign in FIG. 5), a non-inverting terminal (a terminal indicated by a plus sign in FIG. 5), and an output terminal. The inverting terminal of the operational amplifier 2021 is connected to the first terminal of the sensor 201, the first terminal of the resistor 2022a, and the first terminal of the capacitor 2023a. The non-inverting terminal of the operational amplifier 2021 is connected to the first terminal of the resistor 2022b and the first terminal of the capacitor 2023b. The output terminal of the operational amplifier 2021 is connected to the second terminal of the resistor 2022a and the second terminal of the capacitor 2023a. The second terminal of sensor 201 and the second terminal of capacitor 2023b are connected to ground. Capacitor 2023 a is a capacitor for adjusting the amount of feedback of detection circuit 202 and improving the frequency characteristics (phase margin and gain margin) of detection circuit 202 . Also, the output terminal of the operational amplifier 2021 is connected to the processing device 203 , and the output voltage of the operational amplifier 2021 is output to the processing device 203 . A second terminal of the resistor 2022 b is connected to the processing device 203 , and a bias voltage is applied from the processing device 203 to the non-inverting terminal of the operational amplifier 2021 .

As shown in FIG. 6, the processing device 203 includes an A/D (Analog to Digital) conversion unit 2031, a bias generation unit 2032, a processing unit 2033 (an example of first processing means and an example of second processing means), a switching unit 2034, output sections 2035a and 2035b, and a reset section 2036. The processing device 203 is, for example, a computer (including a microcomputer).

The A/D converter 2031 converts the analog output voltage output from the operational amplifier 2021 into a digital output voltage. The A/D converter 2031 is, for example, an A/D converter. Note that the resolution of the A/D converter 2031 is, for example, 10 bits (1024).

The bias generator 2032 generates an analog bias voltage based on the output of the A/D converter 2031 (that is, the read value of the A/D converter 2031 or the voltage value indicated by the read value). The bias generator 2032 applies the generated bias voltage to the second terminal of the resistor 2022b. The resistance value of the sensor 201 varies, for example, in the range of several tens of kilohms to several tens of Gohms. Therefore, when the resolution of the A/D converter 2031 is about 10 bits, the resolution for resistance change is not sufficient. By changing the setting when a predetermined condition is satisfied, the bias generation unit 2032 changes the resistance value of the sensor 201 even when the A/D conversion unit 2031 with low resolution (for example, 10 bits) is used. Responsive to change. An example of changing the settings of the bias generator 2032 is shown below.

For example, it is assumed that the resolution of the A/D converter 2031 is 10 bits and the resistor 2022a is 10M ohms. Assume that the initial value of the bias voltage output by the bias generator 2032 is 4 volts. The initial value of the bias voltage output by the bias generation unit 2032 should be set to 0 volts so that the input/output of the operational amplifier 2021 does not stably change even if the resistance value of the sensor 201 changes. It may be an initial value such as

The setting of the bias generator 2032 is changed, for example, when the range change condition, which is the predetermined condition shown in FIG. 7, is satisfied. The initial value of the bias voltage (corresponding to the D/A output voltage in FIG. 7) output by the bias generator 2032 is 4 volts. The bias voltage output by the bias generation unit 2032 is 4 volts, the read value of the A/D conversion unit 2031 is 958 or less (that is, the output voltage of the operational amplifier 2021 is 4.02 volts or less, and the resistance value of the sensor 201 is 2980 MΩ or more when converted), the set value of the bias generator 2032 is set to 238 (952 when converted to the set value of the A/D converter 2031). Also, the bias voltage output by the bias generation unit 2032 is 4 volts, the read value of the A/D conversion unit 2031 is 1001 or more (that is, the output voltage of the operational amplifier 2021 is 4.20 volts or more, the resistance of the sensor 201 is 206 MΩ or less when converted to a value), the setting of the bias generator 2032 is changed to 119 (476 when converted to the set value of the A/D converter 2031). When the bias voltage output by the bias generator 2032 is 4 volts and the read value of the A/D converter 2031 is 959 or more and 1000 or less, the set value 238 of the bias generator 2032 remains unchanged. In other words, when the bias voltage output by the bias generation unit 2032 is 4 volts, when the output of the A/D conversion unit 2031 is 4.20 volts or more (when the resistance value of the sensor 201 is 206 MOhm or less) ), the bias voltage output by the bias generator 2032 is changed to 2 volts.

The bias voltage output by the bias generation unit 2032 is 2 volts, the read value of the A/D conversion unit 2031 is 500 or less (that is, the output voltage of the operational amplifier 2021 is 2.10 volts or less, and the resistance value of the sensor 201 is 211 MΩ or more in terms of conversion), the setting value of the bias generator 2032 is changed to 238 . Also, the bias voltage output by the bias generation unit 2032 is 2 volts, the read value of the A/D conversion unit 2031 is 1001 or more (that is, the output voltage of the operational amplifier 2021 is 4.20 volts or more, the resistance of the sensor 201 is 9.12 MΩ or less when converted to a value), the set value of the bias generator 2032 is changed to 24 (96 when converted to the set value of the A/D converter 2031). When the bias voltage output by the bias generator 2032 is 2 volts and the read value of the A/D converter 2031 is 501 or more and 1000 or less, the set value 119 of the bias generator 2032 remains unchanged. In other words, when the bias voltage output by the bias generation unit 2032 is 2 volts, when the output of the A/D conversion unit 2031 is 4.20 volts or more (the resistance value of the sensor 201 is 9.12 MOhms or less), The bias voltage output by the bias generator 2032 is changed to 0.4 volts. Also, when the output of the A/D converter 2031 becomes 2.1 volts or less (the resistance value of the sensor 201 is 211 MOhms or more), the bias voltage output by the bias generator 2032 is changed to 4 volts.

The bias voltage output by the bias generation unit 2032 is 0.4 volts, the read value of the A/D conversion unit 2031 is 200 or less (that is, the output voltage of the operational amplifier 2021 is 0.84 volts or less, the resistance of the sensor 201 is 9.28 MΩ or more in terms of value), the setting of the bias generator 2032 is changed to 119. FIG. Further, the bias voltage output by the bias generation unit 2032 is 0.4 volts, the read value of the A/D conversion unit 2031 is 1001 or more (that is, the output voltage of the operational amplifier 2021 is 4.20 volts or more, and the sensor 201 1.06 MΩ or less when converted to the resistance value of ), the setting of the bias generator 2032 is changed to 12 (48 when converted to the set value of the A/D converter 2031). When the bias voltage output by the bias generator 2032 is 0.4 volts and the read value of the A/D converter 2031 is between 201 and 1000, the set value 24 of the bias generator 2032 remains unchanged. That is, when the bias voltage output by the bias generator 2032 is 0.4 volts, the output of the A/D converter 2031 is 4.20 volts or more (the resistance value of the sensor 201 is 1.06 MΩ or less). In this case, the bias voltage output by the bias generator 2032 is changed to 0.2 volts. Also, when the output of the A/D converter 2031 becomes 0.84 volts or less (the resistance value of the sensor 201 is 9.28 Mohm or more), the bias voltage output by the bias generator 2032 is changed to 2 volts.

The bias voltage output by the bias generation unit 2032 is 0.2 volts, the read value of the A/D conversion unit 2031 is 200 or less (that is, the output voltage of the operational amplifier 2021 is 0.84 volts or less, the resistance of the sensor 201 is 3.17 MΩ or more in terms of value), the setting of the bias generator 2032 is changed to 24. Also, the bias voltage output by the bias generation unit 2032 is 0.2 volts, the read value of the A/D conversion unit 2031 is 1001 or more (that is, the output voltage of the operational amplifier 2021 is 4.20 volts or more, and the sensor 201 50.5 kΩ or less when converted to the resistance value of ), the setting of the bias generator 2032 is changed to 3 (12 when converted to the set value of the A/D converter 2031). When the bias voltage output by the bias generator 2032 is 0.2 volts and the read value of the A/D converter 2031 is 201 or more and 1000 or less, the set value 12 of the bias generator 2032 remains unchanged. In other words, when the bias voltage output by the bias generator 2032 is 0.2 volts, the output of the A/D converter 2031 is 4.20 volts or more (the resistance value of the sensor 201 is 50.5 kΩ or less). In this case, the bias voltage output by the bias generator 2032 is changed to 0.05 volt. Also, when the output of the A/D converter 2031 is 0.84 volts or less (the resistance value of the sensor 201 is 3.17 Mohm or more), the bias voltage output by the bias generator 2032 is changed to 0.4 volts. do.

The bias voltage output by the bias generation unit 2032 is 0.05 volts, the read value of the A/D conversion unit 2031 is 200 or less (that is, the output voltage of the operational amplifier 2021 is 0.84 volts or less, the resistance of the sensor 201 is 640 kΩ or more when converted to a value), the setting of the bias generator 2032 is changed to 12. Also, the bias voltage output by the bias generation unit 2032 is 0.05 volts, the read value of the A/D conversion unit 2031 is 1001 or more (that is, the output voltage of the operational amplifier 2021 is 4.20 volts or more, and the sensor 201 is less than 122 kΩ when converted to a resistance value of ), the set value of the bias generator 2032 is set to 3. When the bias voltage output by the bias generator 2032 is 0.05 volts and the read value of the A/D converter 2031 is 201 or more and 1000 or less, the set value 3 of the bias generator 2032 remains unchanged. That is, when the bias voltage output by the bias generation unit 2032 is 0.05 volts, the bias voltage output by the bias generation unit 2032 is increased only when the output of the A/D conversion unit 2031 becomes 0.84 volts or less. Change to 0.2 volts.

Based on the output of the A/D conversion unit 2031, the processing unit 2033 determines whether UV-C is being irradiated from the irradiation device 10 at the location where the sensor 201 is installed. For example, in the case of the example shown in FIG. 7, the processing unit 2033 detects that the output of the A/D conversion unit 2031 is 2980 MΩ or more, that is, the bias voltage output by the bias generation unit 2032 is 4 volts, and the A/D If the read value of the D conversion unit 2031 is 958 or less, it is determined that UV-C is not irradiated. If the bias voltage output by the bias generation unit 2032 does not change from any of 4 volts, 2 volts, 0.4 volts, 0.2 volts, and 0.05 volts, the processing unit 2033 outputs It is determined that the UV-C emitted from the irradiation device 10 has an emission intensity corresponding to the resistance value of the sensor 201 corresponding to the read value of the A/D conversion unit 2031 . That is, for example, the processing unit 2033 determines that UV-C irradiation is not performed when the resistance value of the sensor 201 is equal to or higher than a predetermined resistance value (2980 Mohm or higher in the example shown in FIG. 7). do. Then, the processing unit 2033 transmits to the notification device 30, for example, a notification signal indicating that UV-C irradiation is not performed. By doing so, the user of the notification device 30 can at least avoid entering a place where UV-C is irradiated.

In addition, the processing unit 2033 determines that predetermined irradiation from the irradiation device 10 is performed at the location where the sensor 201 is installed, based on the emission intensity of the irradiation corresponding to the output of the A/D conversion unit 2031 and the emission time of the irradiation. Determine whether or not This determination is made at predetermined short time intervals (for example, every second). Predetermined irradiation is UV-C irradiation that provides predetermined sterilization, sterilization, and sterilization effects. For example, predetermined irradiation is determined in advance as an accumulated time based on the unit emission intensity, and the processing unit 2033 determines the accumulated time based on the unit emission intensity represented by the emission intensity and the emission time of the actually detected irradiation. When the accumulated time based on the unit emission intensity is reached, it is determined that the predetermined irradiation has been performed. In addition, the processing unit 2033 determines that when the cumulative time of the unit light emission intensity represented by the light emission intensity and the light emission time of the actually detected irradiation does not reach the predetermined cumulative time of the unit light emission intensity, the predetermined irradiation is not performed. It is determined that it is not.

The processing unit 2033 transmits, for example, unique identification information indicating itself to the irradiation device 10 via the wireless module 205 before determining that the predetermined irradiation has been performed. When the processing unit 2033 determines that the predetermined irradiation has been performed, the processing unit 2033 transmits identification information and a stop signal for stopping UV-C irradiation to the irradiation device 10 via the wireless module 205 . Then, the irradiation device 10 stops irradiation in response to the stop signal. By doing so, it is possible to avoid unnecessary irradiation of UV-C, which may affect humans. Moreover, the irradiation device 10 can avoid consuming more power than necessary. Note that when the processing unit 2033 determines that the predetermined irradiation has not been performed, the UV-C irradiation may not be stopped (that is, the UV-C irradiation may be continued) until it is determined that the predetermined irradiation has been performed.

Further, the processing unit 2033 may determine, based on the output of the A/D conversion unit 2031, whether the light emitting unit 1011 is deteriorated over time, the irradiation is stopped, or the wire is broken. For example, when the light emitting unit 1011 deteriorates over time, the light emission intensity decreases. Therefore, when the maximum emission intensity of the light emitting unit 1011 indicated by the output of the A/D conversion unit 2031 is equal to or less than a predetermined threshold indicating the emission intensity, the processing unit 2033 determines that the light emitting unit 1011 has deteriorated over time. can do. In addition, the processing unit 2033 determines that the change in light emission intensity per unit time from the light emission intensity near the maximum light emission intensity corresponding to the output of the A/D conversion unit 2031 is equal to or greater than a predetermined threshold indicating the change in light emission intensity. When the change is indicated, the control signal at the timing indicating the change is obtained from the irradiation device 10 . The processing unit 2033 determines that the irradiation has been stopped when the acquired control signal indicates that the irradiation is to be stopped. In addition, the processing unit 2033 determines that a wire breakage has occurred when the acquired control signal does not indicate that irradiation should be stopped. The processing unit 2033 transmits these determination results as notification signals to the notification device 30 and the irradiation device 10, for example. By doing so, the user of the notification device 30 and the user of the irradiation device 10 can recognize that the light emitting unit 1011 has deteriorated over time or has been disconnected. A user who recognizes that the light-emitting unit 1011 has deteriorated over time or has been disconnected replaces the light-emitting unit 1011 or repairs the disconnection, or asks for repairs, so that the deterioration over time or disconnection of the light-emitting unit 1011 can be quickly dealt with. be able to.

In addition, the processing unit 2033 determines that the change in light emission intensity per unit time from the light emission intensity near the maximum light emission intensity corresponding to the output of the A/D conversion unit 2031 is equal to or greater than a predetermined threshold indicating the change in light emission intensity. When a change is indicated, the timing at which the change is indicated is transmitted to, for example, a control device (not shown) that controls the irradiation target as the timing at which the UV-C irradiation is stopped. By doing so, for example, if the object to be irradiated is tap water, etc., the control device controlling the object to be irradiated can stop the object (water in this example) and the UV-C is irradiated. It is possible to prevent the increase or outflow of objects that are not Note that the change in the resistance value of the sensor 201 does not change instantaneously from the minimum resistance value to the maximum resistance value. be. In such a case, the processing unit 2033, instead of the signal indicating the gradual change, momentarily detects the change in the emission intensity per unit time at the timing when the change is equal to or greater than a predetermined threshold indicating the change in the emission intensity. It is also possible to generate a signal with a waveform that changes to the maximum resistance value. Then, the control device that controls the object to be irradiated stops the object (water in this example) at the timing of the waveform of the signal generated by the processing unit 2033 that momentarily changes to the maximum resistance value. good too.

The switching unit 2034 has a GPIO terminal. The switching unit 2034 switches between linear and logarithmic output of a digital signal output by the output unit 2035a, which will be described later, depending on whether or not the resistor R is connected to the GPIO terminal. For example, when the GPIO terminal is pulled down to the ground by the resistor R, the switching unit 2034 outputs the output of the A/D conversion unit 2031 to the output unit 2035a as it is, thereby linearly outputting the value output by the output unit 2035a. Let Further, when the GPIO terminal is in an open state, the switching unit 2034 causes the output unit 2035a to output to the output unit 2035a via a conversion unit (not shown) that performs logarithmic conversion of the output of the A/D conversion unit 2031. Forces output values to be logarithmic.

The output unit 2035a outputs the output of the A/D conversion unit 2031 in the first format. An example of the first format is SPI (Serial Peripheral Interface). For example, when the GPIO terminal is pulled down to the ground by the resistor R, the output section 2035a outputs the output of the A/D conversion section 2031 as a linear signal in a format defined by SPI. Further, when the GPIO terminal is in an open state, the output unit 2035a outputs the output of the A/D conversion unit 2031 as a logarithmic signal in the format defined by SPI. A signal output by the output unit 2035a is transmitted to the irradiation device 10, for example, as a log signal indicating log information of UV-C irradiation via the wireless module 205. FIG.

The output unit 2035b outputs the output of the A/D conversion unit 2031 in a second format different from the first format. An example of the second format is UART (Universal Asynchronous Receiver/Transmitter). For example, the output unit 2035b outputs the output of the A/D conversion unit 2031 as a digital signal defined by UART. A signal output by the output unit 2035b is transmitted to the irradiation device 10, for example, as a log signal indicating log information of UV-C irradiation via the wireless module 205. FIG.

The reset unit 2036 resets the processing device 203 according to a reset signal input via the connector 206 . Reset is to restart the processing device 203 using initial values.

The D/A conversion device 204 converts the digital signal output by the output section 2035a into an analog signal. The D/A converter 204 is, for example, a D/A converter.

The wireless module 205 communicates with the irradiation device 10 and the notification device 30 . For example, the wireless module 205 transmits the analog signal output by the D/A conversion device 204 and the digital signal output by the output unit 2035b as log signals to the irradiation device 10 . The wireless module 205 also transmits the notification signal generated by the processing unit 2033 to the irradiation device 10 and the notification device 30 .

A connector 206 allows connection of the detection device 20 with an external device. For example, the connector 206 is connected to a power source that powers each component in the detection device 20 . Also, for example, the connector 206 is connected to a device (not shown) for inputting a reset signal to the processing device 203 . Note that the connector 206 may be connected to the irradiation device 10 or the notification device 30 by wire.

The notification device 30 notifies the user of information related to UV-C irradiation. The notification device 30 is, for example, a smart phone. For example, the notification device 30 executes a dedicated application program and notifies information contained in the notification signal transmitted from the detection device 20 .

Next, processing of the detection system 1 will be described with reference to FIG. It should be noted that the sensor 201 exhibits a resistance of 2980 MOhms when not irradiated with UV-C. Also assume that the sensor 201 has a resistance of 122k when irradiated with UV-C. It is also assumed that the processing device 203 performs processing according to the range change conditions shown in FIG. It is also assumed that the initial value of the bias voltage generated by the bias generator 2032 is 4 volts.

The control unit 1023 controls the driving unit 1013 not to irradiate UV-C from the light emitting unit 1011 (step S1). The bias generator 2032 outputs the initial value of the bias voltage (4 volts in this case) (step S2). When the UV-C is not irradiated, the sensor 201 has a maximum resistance value (2980 MOhm resistance value) (step S3). Based on the output of the A/D conversion unit 2031, the processing unit 2033 determines whether UV-C is being irradiated from the irradiation device 10 at the location where the sensor 201 is installed. In this case, the processing unit 2033 determines that UV-C irradiation is not performed (step S4). Then, the processing unit 2033 transmits to the notification device 30 a notification signal indicating that UV-C irradiation is not performed. The notification device 30 notifies that UV-C irradiation is not performed (step S5).

Here, the control unit 1023 controls the driving unit 1013 to emit UV-C from the light emitting unit 1011 by transmitting a control signal to the driving unit 1013 (step S6). Driving section 1013 drives light emitting section 1011 based on the control signal. The light emitting portion 1011 emits UV-C. The sensor 201 has a minimum resistance value (122 kohm resistance value) (step S7). Based on the output of the A/D conversion unit 2031, the processing unit 2033 determines whether UV-C is being irradiated from the irradiation device 10 at the location where the sensor 201 is installed. In this case, the processing unit 2033 determines that UV-C irradiation is performed (step S8). Then, the processing unit 2033 transmits to the notification device 30 a notification signal indicating that UV-C irradiation is being performed. The notification device 30 notifies that the UV-C is being irradiated (step S9). The bias generator 2032 generates and outputs bias voltages of 4 volts, 2 volts, 0.4 volts, and 0.2 volts according to the range change conditions shown in FIG. 7 (step S10).

The processing unit 2033 determines whether the irradiation device 10 irradiates the place where the sensor 201 is installed with predetermined irradiation based on the emission intensity of the irradiation corresponding to the output of the A/D conversion unit 2031 and the emission time of the irradiation. It is determined whether there is The processing unit 2033 transmits unique identification information indicating itself to the irradiation device 10 via the wireless module 205 before determining that the predetermined irradiation has been performed. After a while, the processing unit 2033 determines that predetermined irradiation has been performed from the irradiation device 10 on the place where the sensor 201 is installed (step S11). When the processing unit 2033 determines that the predetermined irradiation has been performed, the processing unit 2033 transmits identification information and a stop signal for stopping UV-C irradiation to the irradiation device 10 via the wireless module 205 . The irradiation device 10 stops irradiation according to the stop signal (step S12).

The sensor 201 becomes the maximum resistance value (step S13). Based on the output of the A/D conversion unit 2031, the processing unit 2033 determines whether UV-C is being irradiated from the irradiation device 10 at the location where the sensor 201 is installed. In this case, the processing unit 2033 determines that UV-C irradiation is not performed (step S14). Then, the processing unit 2033 transmits to the notification device 30 a notification signal indicating that UV-C irradiation is not performed. The notification device 30 notifies that UV-C irradiation is not performed (step S15).

The detection system 1 according to one embodiment of the present invention has been described above.
In the detection system 1, the sensor 201 changes its resistance value when it is irradiated with ultraviolet light having at least one wavelength in the UV-C wavelength band. The detection circuit 202 changes the bias voltage according to the resistance value of the sensor 201 and detects the resistance value of the sensor 201 as a voltage value.
By doing so, in the detection system 1, the detection device 20 can detect UV-C with a simple configuration.

A detection device 20 with a minimum configuration according to an embodiment of the present invention will now be described.
A detection device 20 with a minimum configuration according to an embodiment of the present invention includes a sensor 201 and a detection circuit 202, as shown in FIG.
The sensor 201 changes its resistance value when it is irradiated with ultraviolet light having at least one wavelength in the UV-C wavelength band.
The detection circuit 202 changes the bias voltage according to the resistance value of the sensor 201 and detects the resistance value as a voltage value.

Next, the processing of the detection device 20 with the minimum configuration will be described with reference to FIG.
When the sensor 201 is irradiated with ultraviolet rays having at least one wavelength in the wavelength band indicating UV-C, the resistance value changes (step S21).
The detection circuit 202 changes the bias voltage according to the resistance value of the sensor 201, and detects the resistance value as a voltage value (step S22).
By doing so, the detection device 20 can detect UV-C with a simple configuration.

It should be noted that the order of the processes in the embodiment of the present invention may be changed as long as appropriate processes are performed.

Each of the storage unit 1024 and other storage devices (including registers and latches) in the embodiments of the present disclosure may be provided anywhere as long as appropriate information is transmitted and received. Further, each of the storage units and other storage devices may exist in a plurality and store data in a distributed manner within a range where appropriate information transmission/reception is performed.

Although the embodiments of the present invention have been described, the irradiation device 10, the detection device 20, the notification device 30, and other control devices described above may have a computer device therein. The process of the above-described processing is stored in a computer-readable recording medium in the form of a program, and the above-described processing is performed by reading and executing this program by a computer. Specific examples of computers are shown below.
FIG. 11 is a schematic block diagram showing the configuration of a computer according to at least one embodiment;
The computer 5 includes a CPU 6 (including a vector processor), a main memory 7, a storage 8, and an interface 9, as shown in FIG.
For example, each of the irradiation device 10 , the detection device 20 , the notification device 30 and other control devices described above is implemented in the computer 5 . The operation of each processing unit described above is stored in the storage 8 in the form of a program. The CPU 6 reads out the program from the storage 8, develops it in the main memory 7, and executes the above process according to the program. In addition, the CPU 6 secures storage areas corresponding to the storage units described above in the main memory 7 according to the program.

Examples of the storage 8 include HDD (Hard Disk Drive), SSD (Solid State Drive), magnetic disk, magneto-optical disk, CD-ROM (Compact Disc Read Only Memory), DVD-ROM (Digital Versatile Disc Read Only Memory). , semiconductor memory, and the like. The storage 8 may be an internal medium directly connected to the bus of the computer 5, or an external medium connected to the computer 5 via the interface 9 or communication line. Further, when this program is distributed to the computer 5 through a communication line, the computer 5 that receives the distribution may develop the program in the main memory 7 and execute the above process. In at least one embodiment, storage 8 is a non-transitory, tangible storage medium.

Further, the program may implement part of the functions described above. Furthermore, the program may be a file capable of realizing the above functions in combination with a program already recorded in the computer system, that is, a so-called difference file (difference program).

While several embodiments of the disclosure have been described, these embodiments are examples and do not limit the scope of the disclosure. Various additions, omissions, replacements, and modifications may be made to these embodiments without departing from the scope of the disclosure.

Some or all of the above-described embodiments can also be described as the following additional remarks, but are not limited to the following.

(Appendix 1)
a sensor whose resistance value changes when irradiated with ultraviolet rays having at least one wavelength in a wavelength band indicating UV-C;
a detection circuit that changes the bias voltage according to the resistance value of the sensor and detects the resistance value as a voltage value;
A detection device comprising:

(Appendix 2)
The detection circuit is
a differential amplifier, a first resistor, a second resistor, a capacitor;
with
a first terminal of the differential amplifier is connected to a first terminal of the sensor and a first terminal of the first resistor;
a second terminal of the differential amplifier is connected to a first terminal of the second resistor and a first terminal of the capacitor;
a third terminal of the differential amplifier is connected to a second terminal of the first resistor;
a second terminal of the sensor and a second terminal of the capacitor are connected to a reference potential;
the bias voltage is applied to a second terminal of the second resistor;
The detection device according to appendix 1.

(Appendix 3)
First processing means for determining, based on the output of the detection circuit, whether the light emitting means for irradiating the ultraviolet rays is degraded over time, stopped irradiating, or broken.
The detection device according to appendix 1 or appendix 2, comprising:

(Appendix 4)
The first processing means is
determining that the light-emitting means has deteriorated over time when the light-emitting intensity of the light-emitting means is equal to or less than a threshold value indicating a predetermined light-emitting intensity;
The detection device according to appendix 3.

(Appendix 5)
The first processing means is
when a change in luminous intensity per unit time from the luminous intensity near the maximum luminous intensity of the light emitting means corresponding to the output of the detection circuit shows a change equal to or greater than a predetermined threshold indicating a change in luminous intensity; Determining that the irradiation is stopped or that the disconnection is
The detection device according to appendix 3 or appendix 4.

(Appendix 6)
The first processing means is
at a timing at which a change in emission intensity per unit time from the emission intensity near the maximum emission intensity of the light emitting means corresponding to the output of the detection circuit indicates a change equal to or greater than a predetermined threshold indicating a change in emission intensity, If the control signal for controlling the irradiation indicates that the irradiation is to be stopped, it is determined that the irradiation is to be stopped, and if the control signal for controlling the irradiation does not indicate that the irradiation is to be stopped at the timing, it is determined that the disconnection has occurred. judge,
The detection device according to appendix 5.

(Appendix 7)
Timing at which a change in luminous intensity per unit time from the luminous intensity near the maximum luminous intensity of the light emitting means corresponding to the output of the detection circuit indicates a change equal to or greater than a predetermined threshold indicating a change in luminous intensity, A second processing means for determining the timing at which the irradiation of the object to be irradiated is stopped;
The detection device according to any one of appendices 3 to 6, comprising:

(Appendix 8)
The second processing means is
Immediately after the timing at which the change in the emission intensity per unit time from the emission intensity near the maximum emission intensity of the light emitting means corresponding to the output of the detection circuit shows a change equal to or greater than a predetermined threshold indicating the change in emission intensity , correcting the gradual change in the resistance value of the sensor per unit time to the gradual change in the resistance value of the sensor per unit time;
The detection device according to appendix 7.

(Appendix 9)
the detection device according to any one of appendices 1 to 8;
a notification device that notifies information related to whether or not the ultraviolet rays are being irradiated based on the detection result of the detection device;
A detection system comprising:

(Appendix 10)
the detection device according to any one of appendices 1 to 8;
an irradiation device that stops irradiation of the ultraviolet rays based on the detection result of the detection device;
A detection system comprising:

(Appendix 11)
changing the bias voltage according to the resistance value of the sensor, which changes in resistance when irradiated with ultraviolet rays having at least one wavelength in the wavelength band indicating UV-C;
detecting the resistance value as a voltage value;
detection methods, including

(Appendix 12)
to the computer,
changing the bias voltage according to the resistance value of the sensor, which changes in resistance when irradiated with ultraviolet rays having at least one wavelength in the wavelength band indicating UV-C;
detecting the resistance value as a voltage value;
program to run.

1... Detection system 5... Computer 6... CPU
7 Main memory 8 Storage 9 Interface 10 Irradiation device 20 Detection device 30 Notification device 101 Light emitting device 102 Control device 201 Sensor 202...Detection circuit 203...Processing device 204...D/A conversion device 205...Wireless module 206...Connector 1011...Light emission units 1012, 1021...Communication unit 1013... Driving unit 1022 Reception unit 1023 Control unit 1024 Storage unit 2021 Operational amplifiers 2022a, 2022b, R Resistors 2023a, 2023b Capacitors 2031 A/ D conversion unit 2032 Bias generation unit 2033 Processing unit 2034 Switching units 2035a and 2035b Output unit 2036 Reset unit

Claims (10)

a sensor whose resistance value changes when irradiated with ultraviolet rays having at least one wavelength in a wavelength band indicating UV-C;
a detection circuit that changes the bias voltage according to the resistance value of the sensor and detects the resistance value as a voltage value;
A detection device comprising: The detection circuit is
a differential amplifier, a first resistor, a second resistor, a capacitor;
with
a first terminal of the differential amplifier is connected to a first terminal of the sensor and a first terminal of the first resistor;
a second terminal of the differential amplifier is connected to a first terminal of the second resistor and a first terminal of the capacitor;
a third terminal of the differential amplifier is connected to a second terminal of the first resistor;
a second terminal of the sensor and a second terminal of the capacitor are connected to a reference potential;
the bias voltage is applied to a second terminal of the second resistor;
A detection device according to claim 1 . First processing means for determining, based on the output of the detection circuit, whether the light emitting means for irradiating the ultraviolet rays is degraded over time, stopped irradiating, or broken.
3. A detection device according to claim 1 or claim 2, comprising: The first processing means is
determining that the light-emitting means has deteriorated over time when the light-emitting intensity of the light-emitting means is equal to or less than a threshold value indicating a predetermined light-emitting intensity;
4. A detection device according to claim 3. The first processing means is
when a change in luminous intensity per unit time from the luminous intensity near the maximum luminous intensity of the light emitting means corresponding to the output of the detection circuit shows a change equal to or greater than a predetermined threshold indicating a change in luminous intensity; Determining that the irradiation is stopped or that the disconnection is
5. A detection device according to claim 3 or claim 4. The first processing means is
at a timing at which a change in emission intensity per unit time from the emission intensity near the maximum emission intensity of the light emitting means corresponding to the output of the detection circuit indicates a change equal to or greater than a predetermined threshold indicating a change in emission intensity, If the control signal for controlling the irradiation indicates that the irradiation is to be stopped, it is determined that the irradiation is to be stopped, and if the control signal for controlling the irradiation does not indicate that the irradiation is to be stopped at the timing, it is determined that the disconnection has occurred. judge,
6. A detection device according to claim 5. Timing at which a change in luminous intensity per unit time from the luminous intensity near the maximum luminous intensity of the light emitting means corresponding to the output of the detection circuit indicates a change equal to or greater than a predetermined threshold indicating a change in luminous intensity, A second processing means for determining the timing at which the irradiation of the object to be irradiated is stopped;
7. A detection device according to any one of claims 3 to 6, comprising: The second processing means is
Immediately after the timing at which the change in the emission intensity per unit time from the emission intensity near the maximum emission intensity of the light emitting means corresponding to the output of the detection circuit shows a change equal to or greater than a predetermined threshold indicating the change in emission intensity , correcting the gradual change in the resistance value of the sensor per unit time to the gradual change in the resistance value of the sensor per unit time;
8. A detection device according to claim 7. changing the bias voltage according to the resistance value of the sensor, which changes in resistance when irradiated with ultraviolet rays having at least one wavelength in the wavelength band indicating UV-C;
detecting the resistance value as a voltage value;
detection methods, including to the computer,
changing the bias voltage according to the resistance value of the sensor, which changes in resistance when irradiated with ultraviolet rays having at least one wavelength in the wavelength band indicating UV-C;
detecting the resistance value as a voltage value;
program to run.

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