KR100445558B1 - Device for detecting moving body by using a plurality of photo conductive cells - Google Patents

Abstract

The present invention relates to a device for monitoring the body using a photoconductive device for outdoor monitoring during the day when a large amount of infrared radiation. The fuselage monitoring device according to the present invention comprises a detector configured to configure two photoconductive device rods in a pair to detect an amount of change in the amount of light in a predetermined region; And a detection signal processor configured to analyze a change in the amount of light detected by the detector to determine whether the body is invaded in the predetermined area. According to the present invention, it can be used outdoors during the day when there is an extreme change in illuminance of more than 0 to 100,000 lux and a large amount of infrared rays, and its practicality and application are large.

Description

Device for detecting moving body by using a plurality of photo conductive cells

The present invention relates to a fuselage monitoring device, and more particularly to a fuselage monitoring device for monitoring the intrusion of the fuselage during the day and night using a plurality of photoconductive elements.

For the purpose of indoor or outdoor night surveillance or crime prevention, the IR sensor is a very easy and widely used universal technology, and sometimes uses an ultrasonic sensor to reduce the error of the sensor. For example, there is a method of concentrating and emitting a plurality of infrared sensors and receiving them on the other side, for example, by placing a monitoring line or using a surveillance camera, but the former has an extremely limited space and the latter is at zero. Due to the change in illuminance of more than 100,000 lux, the detection distance does not come out, and the cost is also considerable.

In addition, since the photoconductive device is a form in which a metal is lightly coated on a compound, unlike a semiconductor, the resistance value is changed from an extremely small amount of light, but the resistance value is saturated at thousands of lux except in a specially manufactured case. In this case, only the optical switch was used for the purpose of turning on the light or the electronic volume of the electronic instrument.

The technical problem to be achieved by the present invention is to provide a fuselage monitoring apparatus for monitoring the intrusion of the fuselage in response to changes in the amount of light during the day using a photoconductive device.

Another technical problem to be achieved by the present invention is an all-weather fuselage that monitors the intrusion of the fuselage at night by operating as a conventional thermal infrared sensor at night with very little light using a photoconductor or photoconductor as an illumination sensor. It is to provide a monitoring device.

1 shows an embodiment of a sensing fence suitable for bird monitoring as an example of a fuselage monitoring apparatus according to the present invention.

FIG. 2 is a block diagram of a sensing signal processor shown in FIG. 1.

FIG. 3 illustrates the shape of an optically sensed space when the photoconductive device is mounted at one end of the photoconductive device rod shown in FIG. 1.

FIG. 4 is a circuit diagram of connecting two photoconductors shown in FIG. 3 in series and extracting signals from the connection points thereof.

FIG. 5 illustrates the shape of the sensing space when the biconducting element rods shown in FIG. 1 are arranged at a predetermined angle θ.

FIG. 6 illustrates a signal waveform immediately before a bird enters the microprocessor through the low pass filter and the amplification circuit when the current flows through the sensing space shown in FIG. It is shown.

FIG. 7 is a circuit diagram of the boost and oscillator circuit shown in FIG. 2.

FIG. 8 illustrates waveforms of a power supply voltage and a current flowing in the power supply unit shown in FIG. 7.

FIG. 9 illustrates a first amplification and low pass filter and a second amplifying circuit shown in FIG. 2.

FIG. 10 illustrates the shape of concentric circles of spatial cross-sectional area sensed by three pairs of double photoconductive element rods.

FIG. 11 shows the concentric shape of the cross-sectional area of the sensing space formed when vertically arranging the double photoconductive device rods and adjacent another double photoconductive device rods.

FIG. 12 illustrates an example for completely monitoring a specific area by installing two sensing walls facing each other.

FIG. 13 illustrates an embodiment in which a universal infrared sensor is combined with a daytime outdoor sensing device composed of a plurality of double photoconductors as a model of the all-weather ground body monitoring device.

The present invention for solving the technical problem

A detector configured to form two sets of photoconductive device rods to detect a change amount of light in a predetermined region; And a detection signal processor configured to analyze a change in the amount of light detected by the detector to determine whether the body enters the predetermined area.

Preferably, the detector is equipped with a photoconductive element at one end, the cylindrical rod having the same cross-sectional area as the light receiving portion of the photoconductive element; And a support for maintaining the predetermined angles in the up, down, left, and right directions by using the two rods as a pair, and supporting the two rods.

Preferably, the two rods form a pair, and a plurality of pairs are installed on the support.

Preferably, an illuminance sensor for detecting illuminance is further attached to the support.

Preferably, the rod is directed toward the space to be sensed so that the sensing area is limited to the rod so that the photoconductive device reacts to the minute light change of the limited space, and the maximum illuminance of the enclosing hole in the outdoor area is By adjusting the length, the illuminance at the light-receiving portion of the photoconductor is reduced below the photoconductor current saturation illuminance so as to react to any fluctuation of light even during the day.

Preferably, the sensor connects the photoconductive elements of two optoelectronic devices in series, and acquires only the amount of change of the photocurrent through the capacitor in the middle thereof, so that the instantaneous amount of change in the amount of light when the fuselage passes even with a large change in illuminance. Does not change significantly and connects two rods to one sensing circuit to enlarge the sensing space and has a certain angle to each other depending on the purpose of use.

Preferably, the detector must monitor a wide range of distances with multiple twins, so that the twins have a constant angle between each twin and also maintain a constant angle between the twins of each twin to maintain consistency of the error signal over distance. In order to do this, as a rod support, two spheres with different diameters are cut to fix the rods, fixed in a row, and the rods are fixed.

Preferably, the detector is a signal having a shape, timing and amplitude of the waveform by placing a double rod attached to the photoconductive element in parallel with the passing straight line of the fuselage through two cylindrical sensing spaces to create two passing waveforms And determine the error signal.

Preferably, the detector is another way of eliminating the error to arrange a double rod with a photoconductive device perpendicular to the passage line of the fuselage, the angle of the monitoring object and the detection distance and size, and the other double rod Are arranged vertically side by side with the twin rods to filter the error signal with different timing or amplitude magnitudes generated in the two signals when the fuselage passes through the two left and right circles.

Preferably, the sensing signal processing unit expands the sensing space with a plurality of rods, connects the sensing circuits to each of the two sensing rods, and supplies a boosted power to each pair of photoconductive elements to cope with changes in illuminance and extend the sensing distance. A plurality of photoconductive device sensing circuits; A first amplification and low pass filter unit for sensing and amplifying a signal from the photoconductive device sensing circuit unit and removing unnecessary high frequency noise; A second amplifying circuit unit for amplifying the signal from which the noise is removed; A multiplexing circuit unit multiplexing a plurality of signals output from the second amplifying circuit unit and outputting the single signal as a single signal; And a microprocessor for analyzing the signal output from the multiplexing circuit unit to determine the output signal and the error signal.

Preferably, the sensing signal processing unit supplies a maximum voltage allowable by the optoelectronic device in use when the illuminance is low in an independent power supply circuit for supplying power to the photoconductive device sensing circuit to provide a change signal even with a slight light amount change. It is further provided with a booster circuit for maximizing the illuminance and increasing the light current so that the voltage is lowered so as not to exceed the maximum allowable power.

Preferably, the microprocessor converts an analog signal output from the multiplex circuit unit into a digital signal, corrects an error, generates a final detection signal, and further includes a thermal infrared sensor to receive the output signal of the thermal infrared sensor. It generates a thermal infrared detection signal, receives the illumination information from the light sensor, and outputs the photoconductor detection signal to the outside during the day and the thermal infrared detection signal at night.

According to the present invention, it is possible to monitor the intrusion of the body in a predetermined area during the day and night.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 shows an embodiment of a sense fence (fence) suitable for bird monitoring as an example of a fuselage monitoring device according to the present invention. Referring to FIG. 1, the fuselage monitoring device includes a detector 110 and a detection signal processor 120.

The detector 110 includes photoconductive rods 111, photoconductive rod supports 113, a circuit board 114, an illuminance sensor 115, and a case 116.

The circuit board 114 includes a circuit for controlling the photoconductive device rods 111 to detect the fuselage.

The photoconductive device rods 111 are provided in a pair of two, and the front surface of the rods is made of transparent glass or plastic so that the external light can be input as it is and detects the amount of light change. The detector 110 shown in FIG. 1 includes three sets of photoconductive rods to monitor algae, balls, or model airplanes in the air, but may have several sets of photoconductive rods depending on function. For example, when constructing a sensing fence having a maximum monitoring distance of 30 [m] and a monitoring height of [20 m], about 10 trillion photoconductive rods are required.

The pair of photoconductive device rods 111 maintains a predetermined angle in order for the two photoconductive device rods to maintain a predetermined angle to each other and to enlarge a sensing space far from each illuminance. Therefore, the photoconductive device rod 111 maintains a specific angle according to the vertical and horizontal applications, and the photoconductive device rod support 113 supports each photoconductive device rod 111 according to the request, and at the same time It consists of a spherical structure that keeps the angle. For example, it resembles the shape when a watermelon is cut into pieces.

The monitoring device shown in FIG. 1 is intended to monitor the bird as a fence with the surveillance area up and down. If the monitoring device is used to monitor human beings in a large place such as a construction site, a large number of bipolar photoelectric rods may be arranged. At this time, the angle formed between the photoconductive device rods constituting the double photoconductive device rod is formed in a columnar shape.

FIG. 2 is a block diagram of a sensing signal processor shown in FIG. 1. Referring to FIG. 2, the sensing signal processor includes a boosting and oscillating circuit 210, a photoconductive device sensing circuit 220, a first amplification and low pass filter 230, a second amplifying circuit 240, and a multiplex circuit. 250, a microprocessor 260, a control key and a display device 280, and a power supply circuit 290.

The boosting and oscillating circuit unit 210 supplies power to the photoconductive device detecting circuit unit 220, and when the illuminance is low, it supplies the maximum voltage that the optoelectronic device can tolerate, thereby maximizing the change signal even at a minute light amount change at a far distance. When the luminous intensity is large and the photocurrent flows a lot, the voltage is lowered so as not to exceed the maximum allowable power.

The photoconductive device detecting circuit unit 220 includes a plurality of photoconductive device detecting circuits. The plurality of photoconductive device sensing circuits are connected to a plurality of photoconductive device rods 111 of FIG. 1. The photoconductive device detecting circuit unit 220 supplies power to the photoconductor elements provided in the photoconductive device rods to cope with the change in illuminance and extend the sensing distance.

The first amplification and low pass filter 230 includes a plurality of first amplification and low pass filters. The first amplification and low pass filters amplify the signals output from the corresponding photoconductive device sensing circuits, respectively, and remove unnecessary high frequency noise.

The second amplifier circuit unit 240 includes a plurality of second amplifier circuits. The second amplifying circuits receive and amplify the signals output from the corresponding first amplification and low pass filters, respectively.

The multiplex circuit 250 makes a plurality of analog signals output in parallel from the plurality of second amplifying circuits into one serial signal through a time sharing method and outputs the serial signals. In other words, the multiplex circuit 250 generates a short period of pulses recognized and generated by the microprocessor by the number of signals, and accepts the signals only during the pulse period and combines the signals.

This method is applied when the analog input ports cannot be set as many as the number of signals output from the plurality of second amplifier circuits at the input of the microprocessor.

The microprocessor 260 receives the signal output from the multiplex circuit 265 and analyzes it to determine whether the body is invaded. That is, the microprocessor 260 converts an analog signal output from the multiplex circuit 25 into a digital signal, corrects an error, and generates a final sensed signal. A thermal infrared sensor (not shown) is connected to the microprocessor 260, and the microprocessor 260 receives a signal transmitted from the thermal infrared sensor and generates a thermal infrared detection signal, but illuminance from the illuminance sensor (115 in FIG. 1). In response to the information, the photoelectric element detection signal is output to the outside during the day, and the thermal infrared detection signal is output at night.

When the error signal cannot be output, the signals output from the respective photoconductive device rods may be summed and amplified by using one amplification circuit to directly determine whether the body is invaded as a comparator circuit.

FIG. 3 illustrates the shape of an optically sensed space when the photoconductive device is mounted at one end of the photoconductive device rod shown in FIG. 1. Referring to FIG. 3, the photoconductive device rod 111 includes a rod 311 and a photoconductive device 321, for example, a Cds cell, a PbS cell, a ZnSe cell, and the like. 321 is embedded.

The cross-sectional area of the rod 311 is equal to the light receiving portion of the photoconductive element 321, and the length of the rod 311 is directed toward the sun at the maximum illumination intensity during the day, and the illuminance of the rod 311 is horizontal to reach the light receiving portion at this time. The maximum current saturation roughness of the photoconductive element 321 is the most efficient.

The material of the rod 311 may be any plastic or metal, but it is more effective to have a low reflectance so that unnecessary light does not enter. The diameter of the maximum cross-sectional area of the optical sensing space of the predetermined illuminance and the operation of the predetermined object can be said to be the same as the performance of the monitoring device, and the larger the diameter, the longer the maximum sensing distance ends at a point. It is directly connected to the S / N (Signal / Noise) ratio of the input signal. Circuits have noise, such as the noise of the semiconductor itself and AC HUM components, because the incoming input signal must be at least greater than this noise level to be distinguished. The maximum cross-sectional area is naturally related to the illuminance and the size of the sensing object, the length cross-sectional area of the rod 311, and the performance of the photoconductive device 321.

In FIG. 3, when the length of the photoconductive device rod is 1, the diameter of the photoconductive device light receiving unit is d, the maximum cross-sectional area distance is L, and the diameter is D, the diameter D is expressed as in Equation 1 below.

× × 2

For example, when detecting birds at 20,000 lux illuminance, the diameter (d) of the photoconductive light receiver is 0.5 [cm], the length (l) of the photoconductive device rod is 7 [cm], and the sensing distance is 30 [m]. ], The diameter (D) is about 4.3 [m] but actually decreases by 30%.

In order to increase the sensing space in Equation 1, the cross-sectional area of the photoconductive device rod 111 may be increased, but the sensing distance is reduced. Conversely, increasing the length of the photoconductive device rod increases the sensing distance but reduces the space area.

FIG. 4 is a circuit diagram of connecting two photoconductors shown in FIG. 3 in series and extracting signals from the connection points thereof.

Since the signal is output at the intermediate point where the two photoconductors are connected, when the illuminance gradually changes, that is, when the angle of the sun changes or there is a cloud, the resistance value fluctuates at the same rate up and down, so the intermediate point is always (Vc). The maximum signal variation is possible. If the resistance is simply used on the lower side as usual, the midpoint will be close to Vc when it is bright and conversely close to ground (GND) when it is dark.

In addition to absorbing extreme changes in illumination during the daytime and taking out only the amount of change in light quantity, it plays a decisive role in eliminating many errors. Therefore, in any case, the double photoconductor should be used as one element, but the angle between the two photoconductive rods may vary somewhat depending on the application.

For example, when a bird is detected at a distance L, it passes through two sensing cylinders, and the center distance of two cross-sectional circles at that time is H as shown in FIG. It's raining time And angle θ = tan ( ). If the two detection cylinders are farther away due to the large θ, they tend to pass through only one detection cylinder when the bird is going away. do. For example, when the bird's speed is detected at 10 [m / sec] and distance 30 [m], the signal wavelength of FIG. Therefore, if the interval is set to 100 [ms], θ becomes approximately 7.6 degrees.

FIG. 5 illustrates the shape of the sensing space when the biconducting element rods shown in FIG. 1 are arranged at a predetermined angle θ. 5 provides means for detecting an object to be detected in two and removing an error.

FIG. 6 illustrates a signal waveform immediately before a bird enters the microprocessor through the low pass filter and the amplification circuit when the tidal current passes through the sensing space shown in FIG. 5.

When the first waveform 61 passes through the upper photoconductive device, the second waveform 62 is used for error correction as a waveform when passing through the lower photoconductive device.

FIG. 7 is a circuit diagram of the boost and oscillator circuit shown in FIG. 2. Step-up and oscillation circuit 210 plays an important role in raising the sensitivity. The boosting and oscillating circuit unit 210 includes an oscillating circuit 711 and a plurality of boosting circuits 721.

The oscillation circuit 711 can adjust the pulse width and the duty cycle of the oscillation pulse by using a normal timer IC (Integrated Circuit). The pulse width and interval are necessary to adjust the voltage of the boost circuit. The oscillated pulses are stepped up in the boosting circuits 721 using the counter electromotive force of the coils L1, L2, ....

The voltage is expressed by the formula Ev = Therefore, since the transistors of the boost circuit 721 have a fast switching speed and the coil needs to have a large current, a large Q value can be used to obtain high voltage.

Each double photoconductor requires a separately boosted high voltage for the following reasons:

When the illuminance is low, the maximum voltage to the double photoconductor should be applied as much as possible to increase the sensitivity. It must be the same. The resistance value in the element along the horizontal axis decreases proportionally as the illuminance increases, and the current increases. Therefore, if the illuminance increases, the maximum relay power of the device is P, so the current increases in the equation (P = IV). In other words, since the voltage is changed according to the load current, it is impossible to load the bipolar photoconductors together.

FIG. 9 illustrates a first amplification and low pass filter and a second amplifying circuit shown in FIG. 2.

The first amplification and low pass filter unit 220 amplifies the signal to increase the efficiency of the low pass filter, and reduces the output impedance to immediately remove the high frequency noise from the VCVS (Voltage Control Voltage Source) type active low pass filter. When amplification of the detection signal of the photoconductor increases, the noise around 100 [Hz] increases greatly, so attenuation amount of more than 40 [dB] per octave is required. Of course, the cutoff frequency and the cue value should be different according to the sensing object.

The second amplifying circuit unit 240 amplifies to a signal level suitable for the microprocessor to determine.

FIG. 10 illustrates the shape of concentric circles of spatial cross-sectional area sensed by three pairs of double photoconductive element rods.

The sensing object is able to detect perfectly when passing through two circles in the horizontal array.

FIG. 11 shows the concentric shape of the cross-sectional area of the sensing space formed when vertically arranging the double photoconductive device rods and adjacent another double photoconductive device rods.

When vertically arranging, the angle should be adjusted according to the sensing object. Small objects such as birds should be narrowed so that they will not escape from the sensing area. If it is necessary to prevent algae from entering a particular area, increasing the bipolar conduction rods to more than 10 sets enables the installation of tens of meters of detection fences. When it is necessary to horizontally monitor a wide area other than the space, a plurality of biconducting element rods may be arranged to the left and right at intervals from each other.

FIG. 12 illustrates an example for completely monitoring a specific area by installing two sensing walls facing each other.

FIG. 13 illustrates an embodiment in which a universal infrared sensor is combined with a daytime outdoor sensing device composed of a plurality of double photoconductors as a model of the all-weather ground body monitoring device.

The thermal infrared sensor is amplified from the inside and input to the control microprocessor of the monitoring device like the light sensor signal. All weather monitoring is possible because the target can be detected indoors at any time during the day and night at night when there is no light outdoors.

When it is dark, the input level begins to decrease to the double photoconductor element, so that the illumination sensor (115 in FIG. 1) checks the illumination and informs the microprocessor (260 in FIG. 2) of the point in order to quickly and surely transfer the role. The microprocessor then receives signals only from the thermal infrared sensor.

The configuration of each part of the monitoring device and its role are as described above and the process of transforming the signal into the detection signal is described in detail as follows.

In the configuration of monitoring a certain area of the air as shown in FIG. 1, a bird passes through two sensing sources in the sensing space as shown in FIG. And the waveform will be as shown in FIG. When the bird to be monitored closely passes, the left and right waveforms of FIG. 6 become almost attached, and when the distance is far, the waveforms will also be separated. It will also be larger in proximity and less in distance.

This waveform is amplified by the first amplification and low pass filter 230, and unnecessary high frequency noise is eliminated. The clean signal from which the noise is removed is amplified once again by the second amplifying circuit unit 240, and a plurality of input signals are made into a single signal by the multiplex circuit 250 and enter the input port of the microprocessor.

The most important thing to handle in the microprocessor 260 is to eliminate the various errors. There are a number of factors that can cause light fluctuations outdoors. As mentioned above, the output processing circuit of each photoconductor rod is operated independently until the final microprocessor 260 determines the banality, and the photoconductor rods are paired. By connecting them in series and arranging them in parallel with the pass-through of the monitored object, two pass waveforms are obtained. The authenticity of the signal is determined by three factors: the shape, time, and amplitude of the detected waveform. When the object to be monitored is small and in a vertical space, it is easy to determine whether the signal can be judged by the time difference and magnitude of the two signals by connecting two pairs of biconducting element rods perpendicularly to the passing line, that is, longitudinally.

To this end, the microprocessor 260 first performs an analog analysis with an analog-to-digital (A-D) converter, and the data are digitized and judged through calculation of various algorithms. When the amount of external light is insufficient by the illumination sensor 115 connected to the input port of the microprocessor 260, the optical monitoring may be stopped. In particular, even when connected with a thermal infrared sensor, it is necessary to accurately perform the operation of the illumination sensor 115.

The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes are intended to fall within the scope of the claims.

According to the present invention, the invention can be used outdoors in the daytime when there is an extreme change in illuminance of more than 0 to 100,000 lux and a large amount of infrared rays, and the invention solves various problems that cannot be overcome in the past. can see.

In addition, the outdoor surveillance that is possible only with a conventional video surveillance camera can be performed at a much lower cost, and the sensing space can be greatly expanded. For example, it can be used to prevent people from dangerous areas at construction sites during the day, to be used for crime prevention of crops, and to prevent tide crop access.

In addition, it can greatly help to eliminate blackout damage caused by Jeonju's magpie house every spring, bird damage in autumn orchards, or bird damage at airports or shipyards.

Claims (12)

A detector configured to form two sets of photoconductive device rods to detect a change amount of light in a predetermined region; And And a detection signal processor configured to analyze a change in the amount of light detected by the detector to determine whether the body enters the predetermined area. The method of claim 1, wherein the detector A cylindrical rod having one end mounted with a photoconductive element and having the same cross-sectional area as the light receiving portion of the photoconductive element; And And a support for maintaining the predetermined angles vertically, horizontally, and horizontally by using the two rods as a pair, and supporting the two rods. The method of claim 2, wherein the detector The two rods form a pair, the fuselage monitoring device, characterized in that a plurality of pairs are installed on the support. 3. The fuselage monitoring device according to claim 2, wherein an illuminance sensor for detecting illuminance is further attached to the support. The method of claim 2, wherein the rod By limiting the sensing area to the rod to face the space to be sensed, the photoconductive device reacts to the minute light change of the limited space, and reduces the maximum illuminance of the encapsulation in the open air by adjusting the length of the rod. A fuselage monitoring device characterized in that the illuminance at the light receiving portion of the photoconductive element is reduced to less than the photoconductor current saturation illuminance to react to any fluctuation of light even during the day. The method of claim 1, wherein the detector Connect the photoconductor elements of two optoelectronic devices in series, and in the middle, acquire only the change of the photocurrent through the capacitor, so that the instantaneous change of the amount of light when the algae passes through a large change in illuminance does not change significantly and one sense The fuselage monitoring device having the effect of enlarging the sensing space by connecting two rods to the circuit and having a constant angle to each other depending on the purpose of use, is always arranged in pairs as one component. The method of claim 1, wherein the detector Since multiple double rods must be monitored to a far-away distance, they must have a constant angle between the twin rods, and in order to maintain a constant angle between the rods of each twin rod to maintain a constant angle between the two rods, the diameter of the rods can be A fuselage monitoring device, characterized in that the other two spheres are cut to secure the rods, and the rods are fixed in a row. delete delete The method of claim 1, wherein the detection signal processing unit A plurality of photovoltaic element sensing circuit units which extend the sensing space with a plurality of rods, connect sensing circuits to each of the two sensing rods, and supply power boosted to each pair of photoconductive elements to cope with changes in illuminance and enlarge a sensing distance; A first amplification and low pass filter unit for sensing and amplifying a signal from the photoconductive device sensing circuit unit and removing unnecessary high frequency noise; A second amplifying circuit unit for amplifying the signal from which the noise is removed; A multiplexing circuit unit multiplexing a plurality of signals output from the second amplifying circuit unit and outputting the single signal as a single signal; And And a microprocessor for analyzing the signal output from the multiplexing circuit unit and determining and outputting a true signal and an error signal. The method of claim 10, wherein the detection signal processing unit When the illuminance is low in the independent power supply circuit supplying power to the photoconductive device sensing circuit, the maximum voltage allowed by the optoelectronic device can be supplied to maximize the change signal even when the light intensity changes, and when the illuminance is large, the photocurrent flows a lot. The fuselage monitoring device further comprises a boosting circuit for lowering the voltage so as not to exceed the maximum allowable power. The microprocessor of claim 10, wherein the microprocessor is After converting the analog signal output from the multiplex circuit unit into a digital signal and correcting the error, and generates a final detection signal, further comprising a thermal infrared sensor to generate a thermal infrared detection signal by receiving the output signal of the thermal infrared sensor, the illumination Receiving illuminance information from the sensor outputs a photoelectric element detection signal to the outside during the day, and a thermal infrared detection signal outputs at night, the fuselage monitoring device.