KR102615439B1 - Object remote detection sensor using quantum sensing and compressive sensing - Google Patents

Abstract

The present invention relates to a sensor for remote object detection using quantum sensing and compressive sensing. Specifically, it measures gas leakage and concentration, transmits the risk to a real-time control center, and has a relatively wide sensing radius to detect gas components over a long distance. We provide a gas sensing device based on a quantum sensor that can detect.
Furthermore, through the quantum sensing and co-pressive sensing of the present invention, patterns of the human body, moving objects, and indoors and outdoors of buildings can be monitored.

Description

Object remote detection sensor using quantum sensing and compressive sensing}

The present invention relates to a sensor for remote object detection using quantum sensing and compressive sensing. Specifically, it measures gas leakage and concentration, transmits the risk to a real-time control center, and has a relatively wide sensing radius to detect gas components over a long distance. We provide a gas sensing device based on a quantum sensor that can detect.

Furthermore, through the quantum sensing and co-pressive sensing of the present invention, patterns of the human body, moving objects, and indoors and outdoors of buildings can be monitored.

The present invention detects gas using SPAD (single photon avalanche diode).

In addition, it provides system technology to classify and detect harmful gases.

Generally, a gas sensing device detects specific gas components in the atmosphere. Specific gas components are mainly harmful to the human body and include methane (CH4), VOC (Volatile Organic Compounds), formaldehyde, or toluene.

As a gas sensing device for detecting these gas components, the following gas sensing device package has been used in the past. A conventional gas sensing device package included a sensing material for sensing a specific gas component and a heater to activate the sensing material. Here, the sensing material must be activated in order to sense a specific gas component, and the conventional gas sensing device package used a heater to activate the sensing material. A conventional gas sensing device package uses a heater to increase the temperature of the sensing material to activate the sensing material and sense a specific gas component.

However, since a heater must be included in the conventional gas sensing device package, there is an inconvenience of increasing the size. In addition, since the sensing material in the gas sensing device package must be heated to be activated, there was an inconvenience in that it could not be used immediately in a room temperature environment and could only be used after being heated for a certain period of time.

Accordingly, a gas sensing device that senses specific gas components using a light source has emerged. By taking advantage of the property of gas components to absorb light in a specific wavelength band, the conventional gas sensing device irradiates light in the wavelength band absorbed by the component to be detected and senses the amount of reflected light reflected from it to detect the component to be detected. The presence and amount of food was sensed.

The wavelength band of light output from a light source is very sensitive to temperature, and as the temperature around the light source changes, the wavelength band of light output also changes. Due to this problem, if a light source that is not sensitive to temperature is mounted in a gas sensing device, the manufacturing cost increases significantly, and if not, the quality deteriorates significantly.

In addition, there is an inconvenience in that only gas components within a certain distance range can be detected, and for this, there is a problem that a relatively large amount of gas sensing devices must be placed within a certain space.

Additionally, the detected gas was not visualized through images, so the shape of the gas could not be confirmed with the naked eye, making it insufficient to be used for education.

In particular, problems at the work site (gas leaks, etc.) were not visually confirmed to workers.

Compressive sensing uses a collective k-space sampling strategy that takes advantage of the sparsity of MR images. This enables the implementation of high spatial resolution without increasing the number of excitations. By performing compressed sensing in MMME imaging, the number of excitations to obtain 3D spin echo images can be significantly reduced.

The present invention was developed in consideration of the above-mentioned problems, and the present invention is a remote gas sensor using quantum sensing and compressive sensing that measures gas leakage and concentration, transmits the risk to a real-time control center, and has a relatively wide sensing radius to cover long distances. Provides a gas sensing device based on a quantum sensor that can detect gas components.

In addition, when the motor (AA) is driven according to a control signal from a control unit (not shown) while the rotating reflector (B300) is looking at the detector 230 of the infrared camera 200, the rotating reflector (B300) rotates. The problem is to provide a configuration in which infrared rays entering the long wave pass filter 250 are refracted by the reflector A300, and the refracted infrared rays are refracted by the rotating rotating reflector B300 and entered into the detector 230. am.

A light source that sequentially irradiates light in a first wavelength band and light in a preset second wavelength band; a light receiving unit that receives reflected light that is reflected and incident after being irradiated from the light source; and

It includes a control unit that controls the light source to sequentially irradiate light in a preset first wavelength band and light in a preset second wavelength band,

The light in the preset first wavelength band is a wavelength band absorbed by the gas component to be detected, and the light in the preset second wavelength band is a wavelength band other than the wavelength band absorbed by the gas component to be detected,

The control unit controls the light source to alternately irradiate light at a relatively short distance and at a relatively long distance, and correspondingly controls the reception sensitivity of the light receiving unit,

A remote gas sensor using quantum sensing and compressive sensing, characterized in that when controlling the light source to irradiate light at a relatively short distance, the light receiving unit is controlled to operate in linear mode.

The present invention relates to a remote gas sensor using quantum sensing and compressive sensing, and has the effect of measuring gas leakage and concentration and transmitting the risk to a real-time control center.

The above effects are further revealed in specific details.

Figure 1 is a diagram showing the configuration of an artificial intelligence analysis system according to an embodiment of the present invention.
Figure 2 is a diagram showing the configuration of a gas sensing device according to an embodiment of the present invention.
Figure 3 is a diagram showing the configuration of a light source according to an embodiment of the present invention.
Figure 4 is a diagram showing the configuration of a wavelength tunable filter according to an embodiment of the present invention.
Figure 5 is a diagram showing the configuration of an artificial intelligence analysis server according to an embodiment of the present invention.
Figure 6 is a diagram showing sensing values sensed by a gas sensing device according to an embodiment of the present invention.
Figure 7 is a graph showing light absorption of gas according to wavelength.

As the core technology of the present invention, the light receiving unit 220 is implemented as a SPAD array and performs sensing like an image.

In the present invention, the quantum-based gas sensing solution emits light to a facility, analyzes the wavelength of the reflected light, measures gas leakage and concentration, and transmits the risk to a real-time control center by wire or wirelessly.

In the present invention, the quantum-based gas sensing solution emits light to a facility and analyzes the wavelength of the reflected light to measure gas leakage and concentration, and transmits the risk to a real-time control center by wire or wireless, or is implemented as a SPAD array to provide visual information. You can check this.

Referring to FIG. 1, the artificial intelligence analysis system 100 according to an embodiment of the present invention includes a gas sensing device 110 and an artificial intelligence analysis server 120.

The artificial intelligence analysis system 100 is a system that analyzes the generation of gas at sites where gas may be generated, such as a plant. The artificial intelligence analysis system 100 uses light to sense a specific gas component, analyzes the sensed value, and analyzes the occurrence of gas by determining whether it is influenced by external light or caused by the gas component.

The gas sensing device 110 is placed in various places where the system 100 is installed and senses gas components. As will be described later with reference to FIG. 7, each gas component has the characteristic of absorbing light in a specific (unique) wavelength band. If there is no gas component that absorbs light in the corresponding wavelength band in the space where the light is irradiated, a relatively large amount of light will be reflected. Otherwise, a relatively small amount of light will be reflected. Using these characteristics, the gas sensing device 110 senses gas components using light.

The gas sensing device 110 can sense gas components both at a relatively short distance and at a relatively long distance. The gas sensing device 110 irradiates light separately into a relatively short distance and a relatively long distance. The gas sensing device 110 receives reflected light reflected from each distance and determines whether a gas component to be detected exists at each distance.

Since the sensitivity of reflected light reflected from a relatively long distance is relatively significantly low, the gas sensing device 110 senses light with a relatively high sensitivity to determine whether there is reflected light when sensing reflected light reflected from a relatively long distance. Sensing.

When irradiating light to sense gas components, the gas sensing device 110 irradiates both light in the wavelength band absorbed by the gas component and light that is not absorbed.

The gas sensing device 110 is deployed at various sites where gas may be generated.

Because it is aligned, not only the reflected light reflected from the irradiation point but also other miscellaneous light can be received. The gas sensing device 110 irradiates not only the light in the wavelength band absorbed by the gas component but also light that is not absorbed, and determines whether stray light exists by comparing one of them with a control group. A detailed description of the gas sensing device 110 will be described later with reference to FIGS. 2 to 4.

The artificial intelligence analysis server 120 receives the sensing value of the gas sensing device 110 and determines whether there is a gas component to be detected at the irradiation point. The artificial intelligence analysis server (!20) uses the sensing value of the gas sensing device (110) as an input value, and

The learned artificial intelligence learning model is stored as an output value of whether there is a gas component to be detected. The artificial intelligence analysis server 120 analyzes whether there is a gas component at the corresponding survey point by inputting the sensing value received from the gas sensing device 110 as an input value of the learning model. In particular, the artificial intelligence analysis server 120 can analyze whether gas components are present regardless of whether stray light is also sensed based on the sensing value.

A detailed description of the artificial intelligence analysis server 120 will be described later with reference to FIGS. 5 and 6.

Figure 2 is a diagram showing the configuration of a gas sensing device according to an embodiment of the present invention.

Referring to FIG. 2, the gas sensing device 110 according to an embodiment of the present invention includes a light source 210, a light receiving unit 220, a control unit 230, and a communication unit 240.

The light source 210 irradiates light of a preset wavelength band to a preset point.

The light source 210 can output a variable wavelength, and irradiates light in a preset first wavelength band and a preset second wavelength band under the control of the control unit 230. Light in the preset first wavelength band corresponds to light in the wavelength band absorbed by the gas component to be detected, and light in the preset second wavelength band corresponds to light in the wavelength band not absorbed by the gas component to be detected. .

The gas component has the same characteristics as shown in FIG. 7.

Figure 7 is a graph showing light absorption of gas according to wavelength.

Figure 7 is a graph showing the light absorption according to the wavelength of methane, an example of the gas to be detected. Referring to Figure 7, methane shows light absorption above a certain level at various wavelengths. However, a significant amount of light is absorbed in a wavelength band with a very narrow linewidth of about a few pm, and beyond that wavelength band, the light absorption significantly decreases. Accordingly, it can be seen that when light within a certain wavelength range (Δλ) is irradiated, a significant amount is absorbed by the gas component, and when the light is outside the corresponding wavelength range, the light absorption is significantly reduced.

Referring again to FIG. 2, the light source 210 can bring about the following effects by transmitting light in a preset second wavelength band along with light in a preset first wavelength band. As described above, not only the light emitted and reflected by the light source 210 but also other miscellaneous light may flow into the gas sensing device 100, more specifically, the light receiving unit 230. Since other stray light has a negative effect on the accuracy of detection when detecting gas components, it should be excluded in the judgment. Accordingly, the light source 210 irradiates light in two wavelength bands to exclude external influences. The sensing value for both lights is affected by other miscellaneous light to the same or almost the same level, except for that absorbed by the gas component. Accordingly, the difference in the sensing value for sunlight can only differ substantially in whether the light is absorbed due to the gas component.

In this way, the light source 210 irradiates not only light in the wavelength band for detecting gas components but also light in other wavelength bands, thereby minimizing errors due to other stray light.

In order for the artificial intelligence analysis server 120 to clearly and smoothly determine the irradiation point of the light source 210 and the light reception point of the light receiver 220, the light source 210 irradiates light in a preset wavelength band in a pulse form. It can be investigated.

The light source 210 irradiates light in the form of pulses at preset intervals, so that the artificial intelligence analysis server 120 at some point irradiates light from the light source 210 and reflects the light to the light receiver 220. Make it possible to clearly determine whether light has been received.

When the light source 210 irradiates light, it modulates and irradiates light at a preset frequency. When the light source 210 modulates the output light with a preset frequency and irradiates it, the reflected light generated from the light later has the same frequency modulation characteristics. Accordingly, the light receiving unit 220 can analyze whether the received light is light radiated from the light source 210 and even when the light was radiated from the light source 210 according to the reception time. The light receiving unit 220 demodulates through the same process based on the frequency band modulated by the light source 210, and can analyze whether or not the light emitted by the light source 210 has been frequency modulated. Based on this, the light receiving unit 220 can determine whether the light emitted by the light source 210 is for sensing.

The light receiving unit 220 receives reflected light emitted from the light source 210 and then reflected in external space.

The light receiving unit 220 receives reflected light emitted from the light source 210 and then reflected in external space. Based on the point in time at which the light receiving unit 220 received the reflected light, the artificial intelligence analysis server 120 can analyze whether gas components exist at any point. Since the time it takes for the reflected light to enter the light receiving unit 220 after being irradiated from the light source 210 is proportional to the component to be detected and the distance to the light source 210, the artificial intelligence analysis server 120 detects the light receiving unit 220 The distance between the gas component to be detected and the light source 210 can be determined from the point in time when the light is received.

The light receiving unit 220 receives reflected light by varying the receiving sensitivity under the control of the control unit 230. The light receiver 220 is implemented with a single photon avalanche diode (SPAD), and can detect gas components even at a distance where the amount of reflected light incident on it is significantly small.

When detecting gas components located at a short distance, the light receiving unit 230 operates in linear mode under the control of the control unit 230. In linear mode, a gate voltage below the breakdown voltage is applied to the light receiving unit 220, and an output value proportional to the amount of reflected light is generated.

On the other hand, when detecting gas components located at a distance, the light receiving unit 230 operates in gated Geiger mode under the control of the control unit 230. Gated Geiger mode means that when a reverse bias voltage greater than the breakdown voltage is applied to the light receiver, the light receiver operates so that it can detect even if light in units of photons is received from the outside.

When the light receiver 220 operates in gated Geiger mode, a large reverse voltage is applied to the junction area (PN Junction) of the light receiver, and as a result, a large electric field is formed in the junction area. At this time, an electron-hole pair is generated in the junction region by photons incident on the junction region. Electron-hole pairs that acquire energy by the strong electromagnetic field applied to the junction region are accelerated in turn, creating new electron-hole pairs. The cumulative occurrence of this phenomenon is called the avalanche phenomenon. The light receiving unit 230 operates in gated Geiger mode to detect gas components located at a distance and detects a small amount of reflected light using the avalanche phenomenon. Accordingly, as the light receiving unit 220 operates in different ways depending on the distance of the gas component, it can detect whether the gas component to be detected exists even at a long distance with a small amount of reflected light.

The light receiving unit 230 may be implemented as a SPAD, or more specifically, as a SPAD array. Since the light receiving unit 230 is implemented as a SPAD array, reflected light can be sensed as if it were an image of a certain area. That is, the light receiving unit 230 is implemented as a SPAD array, receives reflected light over a certain area, and can determine which part of the area and how much light was incident.

The control unit 230 controls the operation of each component within the gas sensing device 110.

The control unit 230 controls the light source 210 to irradiate light for detecting gas components. The control unit 230 controls the light source 210 to irradiate light in a preset first wavelength band for detecting gas components. do. Furthermore, as described above, the control unit 230 controls the light in the preset second wavelength band to be irradiated sequentially with the light in the first wavelength band in order to distinguish other stray lights.

The control unit 230 controls the light irradiation direction of the light source 210. As described above, depending on the reception sensitivity of the light receiving unit 230, gas components can be detected in a fairly wide range from a short distance to a long distance. For this purpose, the control unit 230 controls the light source 210.

Controls the direction of light irradiation. The control unit 230 controls the light source 210 to irradiate light alternately at a short distance and at a long distance. Accordingly, the gas sensing device 110 can sense both a short distance as well as a long distance.

The control unit 230 controls the operation mode of the light receiving unit 220. When controlling the light source 210 to emit light at a short distance, the control unit 230 controls the light receiving unit 220 to operate in linear mode. The control unit 230 operates the light receiving unit 220 in linear mode to receive reflected light with a sufficient amount (if reflected light exists) to smoothly determine whether gas components are present. On the other hand, when controlling the light source 210 to irradiate light over a long distance, the control unit 230 controls the light receiving unit 220 to operate in the gated Geiger mode. When light is irradiated from a long distance, the amount of reflected light incident on the light receiving unit 220 is significantly reduced even if the same reflection occurs. Accordingly, when the light receiving unit 230 operates in linear mode, there may be cases where reflected light is incident to such an extent that the received light is barely recognized.

However, this may be a decrease in the amount of reflected light due to the presence of a gas component, or simply a decrease in the amount of reflected light incident on the light receiving unit 220 due to the distance. In order to detect reflected light simply reduced due to distance, the control unit 230 operates the light receiving unit 220 in gated Geiger mode.

The control unit 230 controls the communication unit 240 to transmit the sensing value of the light receiving unit 220 to the artificial intelligence analysis server 120.

The communication unit 240 transmits the sensing value of the light receiving unit 220 to the analysis server 120 under the control of the control unit 230. The communication unit 240 may immediately transmit the sensing value of the light receiving unit 220 whenever it is generated, or may accumulate the sensing value of the light receiving unit 220 for a preset time and transmit it at once.

Figure 3 is a diagram showing the configuration of a light source according to an embodiment of the present invention.

Referring to FIG. 3, the light source 210 according to an embodiment of the present invention includes a laser diode 310, a wavelength tunable filter 320, and first to third thermoelectric elements 330, 334, and 338. Furthermore, the light source 210 may further include a band-pass filter 340.

The laser diode 310 irradiates laser light toward the wavelength tunable filter 320. The laser diode 310 receives power from the outside and radiates laser light to the wavelength tunable filter 320.

The wavelength tunable filter 320 is disposed in front of the laser diode 310 in the direction in which the laser diode 310 oscillates light, and transmits only light in a preset wavelength band. As described above, the light source 210 must sequentially irradiate light in a preset first wavelength band and light in a preset second wavelength band. For this purpose, the wavelength tunable filter 320 is disposed at the above-described position, changes the wavelength band of light to be transmitted through it, and passes only light in the corresponding wavelength band.

The first thermoelectric element 330 supports the second and third thermoelectric elements 334 and 338, the laser diode 310, and the tunable filter 320, and adjusts the temperature within the light source 210. The wavelength band of light oscillated by the laser diode 310 or the wavelength band of light passing through the wavelength tunable filter 320 is very sensitive to temperature. Depending on the temperature, the wavelength band of light oscillated or passing through is different even under the same conditions. The first thermoelectric element 330 supports the above-described configurations and sets the internal temperature of the light source 210 to a temperature at which light of a preset wavelength band is irradiated from the light source 210.

The second thermoelectric element 334 supports the laser diode 310 on the first thermoelectric element 330 and controls the temperature of the laser diode 310. The second thermoelectric element 334 intensively controls only the temperature of the laser diode 310, and ensures that the light oscillating from the laser diode 310 and passing through the wavelength tunable filter 320 has a preset wavelength band. In order for light in a preset wavelength band to be output from the light source 210, a specific temperature must be set inside the light source 210. However, in order to satisfy the above-described conditions, the temperature inside the light source 210 and the temperature of the laser diode 310 may be different from each other. Accordingly, a second thermoelectric element 334 is additionally disposed on the first thermoelectric element 330 to separately adjust the temperature of the laser diode 310.

The third thermoelectric element 338 supports the wavelength tunable filter 320 on the first thermoelectric element 330 and controls the temperature of the wavelength tunable filter 320. Like the laser diode 310, the temperature of the wavelength tunable filter 320 must be controlled independently of the temperature inside the light source 210 in order to transmit light in a preset wavelength band. The third thermoelectric element 338 independently controls only the temperature of the wavelength tunable filter 320 on the first thermoelectric element 330.

In order to more reliably control the temperature of the wavelength tunable filter 320, the third thermoelectric element 338 may be arranged as shown in FIG. 4.

Figure 4 is a diagram showing the configuration of a wavelength tunable filter according to an embodiment of the present invention.

As shown in FIG. 4, the wavelength tunable filter 320 is disposed and supported on the first thermoelectric element 330, and the third thermoelectric element 338 surrounds the outside of the wavelength tunable filter 320. can be placed. As it is arranged to surround the exterior of the wavelength tunable filter 320, the third thermoelectric element 338 can control the temperature of the wavelength tunable filter 320 more quickly.

Referring again to FIG. 3, an additional band-pass filter 340 may be disposed in front of the wavelength tunable filter 320 in the direction in which light is irradiated from the laser diode 310. A band-pass filter 340 is disposed, and light other than the light that has passed through the wavelength-tunable filter 320 is filtered.

Figure 5 is a diagram showing the configuration of an artificial intelligence analysis server according to an embodiment of the present invention.

Referring to FIG. 5, the artificial intelligence analysis server 120 according to an embodiment of the present invention includes a communication unit 510, an analysis unit 520, a memory unit 530, and a control unit 540.

The communication unit 510 receives the sensing value of the light receiving unit 220 from the communication unit 510 in the gas sensing device 110.

In some cases, the communication unit 510 may transmit the analysis results of the analysis unit 520 to the outside, such as the administrator terminal of the artificial intelligence analysis system 100.

The analysis unit 520 analyzes whether a gas component to be detected at a corresponding point exists from the received sensing value.

The analysis unit 520 detects the presence or absence of gas components from the received sensing value using an artificial intelligence learning model stored in the memory unit 530. The artificial intelligence learning model is an artificial intelligence learning model that receives the sensing value of the gas sensing device 110 and is learned to output whether there is a gas component to be detected at the irradiation point.

Since the light receiver 220 is implemented as a SPAD array and performs sensing like an image, the artificial intelligence learning model is learned based on a CNN (Convolutional Neural Network) learning model.

Learning of the artificial intelligence learning model is performed on the sensing values shown in FIG. 6.

Figure 6 is a diagram showing sensing values sensed by a gas sensing device according to an embodiment of the present invention.

Figure 6a shows a situation in which the light receiving unit 220 senses reflected light in a preset first wavelength band in a situation where a gas component to be detected is present at the irradiation point.

As shown in FIG. 6A, a relatively large amount of reflection occurs at a point where no gas component exists among the points where light is irradiated, so the reflected light 610 reflected at that part within the sensing value has a sensing value of a certain size. have

On the other hand, since the light emitted by the gas component is absorbed at the point where the gas component is present, the reflected light 620 reflected at that portion has a sensing value close to 0 or relatively small in size.

In a situation where stray light does not enter the light receiving unit 220, detection of gas components can be performed smoothly even if only the sensing value of the reflected light in the preset first wavelength band is analyzed as shown in FIG. 6A.

In this case, as shown in FIG. 6A, the sensing value of the reflected light 640 reflected at the point where the gas component is present and the reflected light 630 that is not reflected can be clearly distinguished.

The artificial intelligence learning model calculates the input difference and determines whether a gas component exists based on whether the difference exists.

Using the learning model learned in this way, the analysis unit 520 inputs sensing values of different wavelength bands as one set and analyzes whether gas components are present.

The memory unit 530 stores an artificial intelligence learning model for the analysis unit 520 to analyze the presence or absence of gas components.

The control unit 540 controls the operation of each component (510, 520) in the artificial intelligence analysis server.

Next, another embodiment is described with reference to FIGS. 8 to 14.

Figure 8 is an example diagram showing a method for classifying and detecting harmful gases using a band pass filter according to the prior art. It was expected that sharp detection would be possible only for harmful gases using a narrow band band pass filter according to the prior art. Actual test results showed that this narrow-band filter weakened the intensity of the infrared light source coming in from the surrounding area, resulting in deterioration in performance.

According to an embodiment of the present invention proposed to solve this problem, as shown in FIG. 14, a plurality of long wave pass filters are included, and the thresholds are set to 7.044um, 8.996um, 8.002um, and 13.570um. , it is possible to detect at least one harmful gas among methane, ethane, hydrogen sulfide, and benzene.

According to the embodiment, the intensity of the infrared light source is relatively greater compared to the case of using a band pass filter, so the imaging performance of harmful gases is improved.

The filter rotating unit according to the embodiment includes a step motor 410 and a motor controller 420, and the motor controller 420 operates by receiving voltage from the motor power unit 430, and generates a long wave by the step motor 410. The step motor value is set using the intensity information of the infrared light source coming in according to the rotation of the barrel including the pass filter 250 and the lens 240, and the barrel is exchanged by rotating the rotary plate using the set step motor value. and placed at the infrared inlet (210).

Accurately positioning the optical tube (lens and filter) selected to be used for each harmful gas at the center of the infrared detector 230 greatly affects the performance of shaping the harmful gas leak image.

According to the embodiment, compared to the case where the user manually sets, precise settings are possible, and by storing and managing the step position that is simply calculated mechanically using the infrared light source intensity information, the precise corresponding position is possible. It is possible to place the optical tube. This has the effect of increasing the visualization performance of infrared-based harmful gas leak images.

Figure 8 is a block diagram showing the operation of an uncooled harmful gas classification and detection device using IP according to an embodiment of the present invention.

An uncooled harmful gas classification and detection device using IP according to an embodiment of the present invention includes a lens 240 and a long wave pass filter.

An uncooled infrared camera (250) and an infrared filter bank including a rotating plate 300, acquires harmful gas detection information by taking thermal images passing through the long wave pass filter 250, and stores this information on a web server ( 200) and long wave pass filter

It includes a step motor 410 that rotates 250 and a camera 100 that acquires real images of the shooting area of the uncooled infrared camera 200.

The camera 100 according to an embodiment of the present invention is a CCD network camera and transmits a CCD image to the IP router 700, and the uncooled infrared camera 200 transmits the acquired infrared image to the IP router 700. do. The IP router 700 transmits a motor control signal and drives the step motor 410 under the control of the step motor controller 420 to control the rotation angle of the optical tube.

The step motor 410 according to the embodiment rotates the infrared filter bank to place at least one of the plurality of long wave pass filters 250 in front of the uncooled infrared camera 200. At least one of the plurality of long wave pass filters 250 is applied to the front of the uncooled infrared camera 200, that is, the infrared rays, using a step motor value preset according to the intensity information of the infrared light source coming into (200). Place it at the entrance.

A filter unit including a plurality of long wave pass filters having a preset pass threshold based on the transmittance of each infrared wavelength band of the harmful gas to be detected;

The long wave pass filter is rotated using a step motor, and the intensity value of the infrared light source introduced as the long wave pass filter is rotated by the step motor is calculated to be a step motor value obtained with respect to the step point corresponding to the peak value. A filter rotating unit that rotates the long wave pass filter using;

an infrared thermal image acquisition unit that acquires an infrared thermal image input through the filter unit; and

An uncooled harmful gas classification and detection device including a harmful gas detection unit that classifies and detects the harmful gas based on the infrared thermal image acquired by the infrared thermal image acquisition unit.

Long wave pass filters 250 for receiving infrared rays are provided on the right side of the front of the body AAA, and reflectors A300 for refracting infrared rays are provided behind the long wave pass filters 250.

A rotating reflector (B300) rotated by a motor (AA) is placed in the center between each of the reflection plates (A300).

It is provided with an uncooled infrared camera (200) located behind the rotating reflector (B300).

Looking at another second embodiment, when the rotating reflector (B300) drives the motor (AA) according to a control signal from a control unit (not shown) while looking at the detector 230 of the infrared camera 200, the rotating reflector (B300) (B300) rotates, and at this time, the infrared rays entering the long wave pass filter 250 are refracted by the reflector A300, and the refracted infrared rays are refracted by the rotating rotating reflector B300 again and are transmitted to the detector 230. It is a composition that is introduced into .

As described above, when the rotating reflector (B300) is rotated (equivalent to forward and reverse rotation), infrared rays are alternately received from both reflectors (A300) and output to the detector (230).

When the filter 250 and the range 240 rotate as in the first embodiment, the lens 240 does not line up with the detector 230 in a straight line.

The reason is that harmful gases must be continuously monitored, so the lens must be continuously rotated without stopping (if it has an instantaneous stop function, the cost increases significantly because a precise device must be installed).

When the filter 250 and lens 240 rotate, the infrared rays entering the detector 230 are not accurately introduced, so the infrared data values are not accurate.

With the filter 250 and lens 240 fixed, the rotating reflector can be rotated forward and backward.

In the process of repetitive rotation, an instantaneous and precise stop is made at the end of forward rotation (the point where reverse rotation begins after forward rotation) and the end of reverse rotation (the point where forward rotation begins after reverse rotation), and at that time, infrared rays travel through the reflector. Since it is introduced through, it is accurately introduced into the detector at this time.

A filter is provided on one of the left and right sides of the front of the body to receive an image obtained from a band with good transmission (non-absorption) in the IR spectrum of the target gas, and serves as a reference image.

On the other side, a filter is provided to receive an image obtained from a band that is easily absorbed in the IR spectrum of the target gas, and an absorption image is created.

Gas is monitored by comparing the reference image and absorption image.

The lens barrel including the lens 240 and the filter 250 according to an embodiment of the present invention is rotated by the step motor 410 and placed at the inlet 210 through which infrared rays enter.

The filter rotating unit according to an embodiment of the present invention includes a step motor 410 and a motor controller 420, and the motor controller 420 operates by receiving a voltage from the motor power supply unit 430 and is connected to the step motor 410. The step motor value is set using the intensity information of the infrared light source that comes in according to the rotation of the barrel including the long wave pass filter 250 and the lens 240, and the rotary plate is rotated using the set step motor value. The optical tube is exchanged and placed at the infrared inlet (210).

Accurately positioning the optical tube (lens and filter) selected to be used for each harmful gas at the center of the infrared detector 230 greatly affects the performance of shaping the harmful gas leak image.

However, in Example 1, the continuously rotating barrel as described above was used.

As in the first embodiment, when the filter 250 and the range 240 corresponding to the barrel rotate, the lens 240 does not line up with the detector 230 in a straight line.

This is because harmful gases must be continuously monitored, so the lens must be continuously rotated without stopping (if it has a momentary stop function, the cost increases significantly because a precise device must be installed).

100 ; artificial intelligence analysis system
110 ; gas sensing device
120 ; Artificial intelligence analysis server

Claims (1)

In a gas sensing device for remote object detection using quantum sensing and compressive sensing

The gas sensing device is provided with a long wave pass filter 250 that receives infrared rays on the left and right sides in front of the body AAA, and a reflector A300 that refracts infrared rays behind the long wave pass filter 250. do
A rotating reflector (B300) is provided in the center between each of the reflectors (A300) and rotated by a motor (AA), and an infrared detector (230) is located behind the rotating reflector (B300).

When the motor (AA) is driven according to a control signal from the controller while the rotating reflector (B300) is facing the detector 230, the rotating reflector (B300) rotates. At this time, infrared rays enter the long wave pass filter 250. The infrared rays are refracted by the reflector (A300), and the refracted infrared rays are refracted by the rotating reflector (B300) and entered into the detector (230).

An object using quantum sensing and compressive sensing, characterized in that it includes a configuration that alternately receives infrared rays from both reflectors (A300) through the rotating rotating reflector (B300) and outputs them to the detector (230) (incoming from the detector). remote detection sensor,