JP2009178140A - Intruder detection device and intruder threatening device equipped with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enter and enter harmful birds and animals with a small number of devices even in a condition in which the direction and position where the harmful birds and animals enter cannot be specified with respect to a specific range where it is desired to prevent harmful animals and animals from entering. Direction is detected accurately at low cost. In addition, the present invention provides a device that prevents habituation to threats by giving threatening stimuli toward the direction of the detected harmful birds and beasts.
SOLUTION: A plurality of infrared detectors for detecting infrared rays emitted from harmful birds and beasts and outputting detection signals are arranged on the circumference of the base body while partially overlapping the detection visual fields of the plurality of infrared detectors. Of the infrared detection visual fields formed around the base body by the arranged infrared detection unit, the detection visual field is used to determine the direction in which the harmful birds and beasts are present. In addition, threatening stimuli such as light, sound, and smell are emitted in the direction where harmful birds and beasts exist.
[Selection] Figure 5

Description

  The present invention relates to a threatening device that detects birds such as crows and beasts such as moths that cause damage to crops and the like and threatens them to keep them away from a specific range.

  As a means to threaten harmful birds and beasts that cause serious damage to crops before harvesting, a device that emits a loud plosive sound every predetermined time, a device that emits a squealing warning by birds (for example, Patent Document 1), or those sounds In addition, a device that emits a flash is known. Among these devices, those that emit a plosive sound every predetermined time can surprise birds and beasts over a wide range with a relatively simple structure, and have long been used to drive away sparrows that approach the field crops. Has been used. However, since this method automatically generates a large acoustic plosive sound that reverberates at regular intervals, it has been a noise pollution for human beings living around.

Therefore, as shown in Patent Document 2, there has been proposed a device that detects the invasion of harmful birds and animals within a specific range by an infrared sensor and threatens with explosion sound and flash when the birds and animals enter. This proposal solves the problem of periodically exploding to the surroundings regardless of the presence or absence of harmful birds and beasts, and can cope with the problem of habituation to threatening stimuli for birds and beasts learning like crows. However, in the proposed device, it is necessary to install an infrared sensor at the place where the birds and beasts enter, and to arrange the speaker and the flash lamp according to the entry position, and the positions where the birds and animals enter are limited to some extent. Although an effect can be expected in such a place, in order to obtain an effect under conditions where the position and direction of entry cannot be specified, it is necessary to increase the number of installed devices. For this reason, in Tabata, where the possibility of birds and animals entering the entire circumference is considered, it is practically difficult to set the entire circumference as the detection range of the infrared sensor, and the apparatus is installed with a rough arrangement interval. Even so, the problem of increased costs was inevitable.
Japanese Patent Laid-Open No. 06-343378 JP 2004-73105 A

  The present invention has been made in response to the problems of the preceding examples, and the problem is that the direction in which the harmful birds and animals enter the specific range where it is desired to prevent the entry of the harmful birds and animals. Even under conditions where the position cannot be specified, it is to accurately detect the entry of harmful birds and beasts and the direction in which they enter with a small number of devices at low cost. It is another object of the present invention to provide a device that prevents habituation to threats by giving threatening stimuli in the direction of the detected harmful birds and beasts.

  In order to solve the above-described problems, the present invention provides an intrusion detection device that detects the presence of an intruder by receiving infrared light emitted by an intruder such as a harmful bird and beast, and receives an infrared light and outputs a detection signal. And a base body in which a plurality of the infrared detection units are arranged on the circumference, and an intrusion body based on the arrangement position of the infrared detection unit that outputs an infrared detection signal among the plurality of infrared detection units arranged in the base body. A direction detection unit that determines an existing direction, and the detection visual fields of the plurality of infrared detection units arranged on the circumference of the base body are partially overlapped with each other by the adjacent infrared detection units. An intruder detection apparatus is proposed in which a direction in which an intruder exists is determined based on infrared detection signals from a plurality of infrared detectors with overlapping.

  In the proposed intruder detection apparatus, N infrared detectors arranged on the circumference of the base body are arranged with a detection visual field angle α (rad), respectively, and 2π (rad) around the base body. When the detection visual field to be formed is divided into a plurality of units with a predetermined unit angle θ1 (rad), the direction in which the intruder is present is satisfied by satisfying the following relationships (1), (2), and (3), and the direction detection resolution θ1 (rad) It is desirable to judge by. (1) When the detection field angle overlapping between the infrared detectors adjacent on the circumference of the base body is α− (2 × θ1) (2) When α / θ1 = n, an odd number of n = 3 or more (3) θ1 = π / N (rad)

  Further, in a device that detects the presence of an intruding body by receiving infrared rays emitted from an intruding body such as harmful birds and beasts and performs a threatening action toward the detected intruding body, the proposed intruder detecting device, An intimidating part that gives a stimulating action to an organ, an intimidating direction variable part that changes an output direction of a stimulus output from the intimidating part, and the intimidating direction variable according to the direction in which the intruder is detected by the intruder detecting device An intruder threatening device including a threatening direction control unit that variably operates the head and outputting threatening stimuli such as sound, light, and smell toward the approaching body is proposed.

  According to the intruder detection apparatus of the present invention, a plurality of infrared detectors that detect infrared rays emitted by harmful birds and beasts and output detection signals are provided, and the base body circle is partially overlapped with the detection visual fields of the plurality of infrared detectors. It arrange | positions on a periphery and the direction where a harmful bird and beast exist is judged based on the detection signal of the infrared detection part with which a detection visual field overlaps. By arranging the detection fields of the infrared detectors on the circumference of the base body while partially overlapping, the detection fields of each infrared detector are set radially to the periphery in the horizontal plane including the circumference of the base body. It is possible to know the direction in which the presence exists by judging the detection field of the throat in which the harmful birds and beasts were captured. In particular, in the present invention, even if a commercially available general-purpose infrared pyroelectric sensor having a relatively wide detection field of view is used for the infrared detection unit by partially overlapping the detection field of the infrared detection unit disposed adjacently, The detection field of the infrared pyroelectric sensor can be divided into multiple areas and detected for each of them, and harmful birds and beasts can be detected with a resolution higher than the resolution corresponding to the number of infrared detectors actually placed. Can do. Specifically, when only an infrared detection unit A detects infrared rays, it is determined that there is a bird and beast substantially in front of the infrared detection unit A, and both the infrared detection unit A and the infrared detection unit B located on the right side thereof. Detects that there are birds and beasts in the detection field overlapping with the infrared detectors A and B when the infrared detector detects infrared rays, and both the infrared detector A and the infrared detector C located to the left of the infrared detectors detect infrared rays. When it is done, it can be determined that there are birds and beasts in the detection field of view overlapping between the infrared detection units A and C. Accordingly, it is possible to use a region where the detection visual fields overlap between adjacent infrared detectors as a single functional infrared detector, which is twice the number of infrared detectors actually arranged. Detection resolution can be obtained and excellent cost effectiveness can be obtained. Furthermore, overlapping of the detection fields of adjacent infrared detection units can prevent blind spots from occurring between adjacent infrared detection units, and individual differences of the infrared detection units related to the detection field of view and mounting accuracy with respect to the base body Some variation can be allowed.

  Further, for example, the detection field angle α per infrared detection unit according to the present invention is set to 3π / 10 radians, and this is divided into three equal parts by π / 10 radians, and the detection visual field angle obtained by dividing the detection field angle into three equal parts by the adjacent infrared detection units. If the detection field of view is not duplicated by overlapping each third by 10 infrared detectors on the circumference of the base body, a resolution of 2π radians divided into 10 (one viewing angle is π / 5 radians) can be increased to a resolution obtained by dividing 2π radians into 20 (one viewing angle is π / 10 radians). Accordingly, it is possible to detect the presence / absence and direction of the birds and beasts with a sufficient resolution of π / 10 radians with respect to the surrounding 2π radians in the horizontal plane using ten infrared detection units.

  In addition, the direction of the harmful birds and animals is detected by the intruder detection device, and intimidating stimuli such as sound, light and odor are given to the harmful birds and animals, so only when the harmful birds and animals enter a specific area such as around the crops. A threatening stimulus can be given directly to birds and beasts. Therefore, it is possible to effectively threaten harmful birds and beasts with learning ability without getting used to them.

  By using as few infrared detectors (infrared pyroelectric sensors) as possible, and by overlapping the detection field of each infrared detector, the surrounding 2π radians in the horizontal plane with as high detection resolution as possible Detects the presence of harmful birds and beasts present in Then, a threat is directly given to the detected harmful birds and beasts.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an external view showing an intruder detection apparatus according to an embodiment of the present invention, and FIG. 2 is an explanatory view showing a detection visual field of the intruder detection apparatus. An intruder detection apparatus 1 according to the present invention includes a base body 3 including an infrared pyroelectric sensor 2 serving as an infrared detection unit, a leg 4 that holds the base body in a space of a predetermined height, and a leg 4 that is stable on an installation surface. And a support plate 5 that is suspended in the state. The base body 3 has a cylindrical outer shape, and ten infrared pyroelectric sensors 2-1 to 2-10 are arranged at equal intervals along the circumference of the outer surface at equal intervals. Yes.

  FIG. 2 shows the field of view detected by these ten infrared pyroelectric sensors 2. FIG. 2 is an explanatory view schematically showing a detection visual field by ten infrared pyroelectric sensors 2 when the base body 3 is viewed from above. The solid line extending radially in the figure represents the detection visual field of the infrared pyroelectric sensor, and the fan-shaped region is a region where infrared rays can be detected. The fan-shaped areas with circled numbers 1 to 10 are the detection visual fields of the individual infrared pyroelectric sensors, and each detection visual field divides the fan-shaped central angle α (detection visual field angle) into three equal unit angles θ1. The detection field of the unit angle θ1 divided into three equal parts is arranged on the circumference while overlapping the adjacent infrared pyroelectric sensors. Accordingly, exactly 10 infrared pyroelectric sensors can be arranged with respect to the circumference 2π radians of the base body 3 while overlapping the detection visual fields of the infrared pyroelectric sensors by the unit angle θ1. In addition, 20 detection fields of the minimum unit represented by a sector shape having a unit angle θ1 can be formed with respect to the circumference 2π radians of the base body 3. That is, the detection field angle α of each infrared pyroelectric sensor is 3π / 10 radians (54 °), and the minimum detection field angle θ1 is π / 10 radians (18 °).

Next, an approaching object detection operation according to the embodiment of the present invention will be described. This detection operation is an operation that is processed in a direction detection unit (not shown) provided in the apparatus. The detection operation is executed according to the principle shown in FIG. 3 in response to the infrared detection signal from the infrared pyroelectric sensor 2. The FIG. 3 shows the relationship between the infrared detection results of the individual infrared pyroelectric sensors and the direction of presence of the intruder (harmful birds and beasts) determined from the detection results. For convenience of explanation, only the infrared pyroelectric sensors 2-10, 2-1, 2-2, 2-3, 2-4 will be described. “◯” in the table indicates that infrared rays are detected, and “−” indicates that infrared rays are not detected. As shown in the table, the direction of the presence of the approaching object is determined as follows.
When the infrared pyroelectric sensors 2-10 and 2-1 detect infrared rays, it is determined that harmful birds and beasts exist in the detection visual field a shown in FIG. 2, which is a region where the detection visual fields of both sensors overlap.
● When only the infrared pyroelectric sensor 2-1 detects infrared rays, it is determined that harmful birds and beasts exist in the detection visual field b.
When the infrared pyroelectric sensors 2-1 and 2-2 detect infrared rays, it is determined that harmful birds and beasts are present in the detection visual field c, which is an area where the detection visual fields of both sensors overlap.
● When only the infrared pyroelectric sensor 2-2 detects infrared rays, it is determined that harmful birds and beasts exist in the detection visual field d.
When the infrared pyroelectric sensors 2-2 and 2-3 detect infrared rays, it is determined that harmful birds and beasts exist in the detection visual field e, which is a region where the detection visual fields of both sensors are overlapped.
When only the infrared pyroelectric sensor 2-3 detects infrared rays, it is determined that harmful birds and beasts exist in the detection visual field f.
When the infrared pyroelectric sensors 2-3 and 2-4 detect infrared rays, it is determined that harmful birds and beasts exist in the detection visual field g, which is a region where the detection visual fields of both sensors are overlapped.

  As described above, the infrared pyroelectric sensors 2-5 to 2-9 which are not shown in the table are similarly judged, and the 2π radians around the base body 3 are monitored in the detection field of 20 sections (that is, the direction) Detection resolution θ1 = π / 10 radians). Incidentally, if the maximum detection distance of the infrared pyroelectric sensors 2-1 to 2-10 shown in FIGS. 1 and 2 is set to 15 m, at a place 15 m away from each infrared pyroelectric sensor arranged on the base body 3, The length of the fan-shaped arc formed by the detection field of unit angle θ1 is about 4.7 m, and the direction of presence can be detected with sufficient accuracy even for a large ridge.

In the above description, the example in which the unit angle θ1 is set to π / 10 radians has been described. However, the present invention can be implemented with other unit angles θ1 and detection viewing angle α as shown in FIG. As an example, as shown in FIG. 4A, even when the number of infrared pyroelectric sensors is four and each detection visual field angle α of the infrared pyroelectric sensor is 3π / 4 radians, the azimuth detection resolution θ1 is π / 4 radians. It can be implemented as. Further, as shown in FIG. 4B, even when the number of infrared pyroelectric sensors is eight and each detection visual field angle α of the infrared pyroelectric sensor is 5π / 8 radians, the direction detection resolution θ1 is π / 8 radians. It can be implemented. Furthermore, as shown in FIG. 4 (c), even if the number of infrared pyroelectric sensors is 10 and each detection visual field angle α of the infrared pyroelectric sensor is 5π / 10 radians, the azimuth detection resolution θ1 is π / 10 radians. It can be implemented. In short, harmful birds and beasts can be detected with an azimuth detection resolution of angle θ1 radians when the following relationships (1), (2), and (3) are satisfied.

When the detection visual field angle of each infrared pyroelectric sensor is α and the number of infrared pyroelectric sensors arranged on the circumference of the base body 3 is N,
(1) The detection visual field angle which overlaps between the infrared pyroelectric sensors adjacent on the circumference of the base body 3 is α− (2 × θ1).
(2) When α / θ1 = n, n is an odd number greater than or equal to 3 (3) θ1 = π / N (rad)

  In the above embodiment, the detection is performed over the entire circumference of the base body 3 over 2π radians. However, the present invention is not limited to this. For example, a partial range corresponding to π radians or 3π / 2 radians may be set as a detection target. In that case, an infrared pyroelectric sensor corresponding to a range not to be detected may not be arranged.

An approaching body threatening device using the approaching body detection device configured as described above will be described with reference to FIGS. FIG. 5 shows the appearance of the approaching body threatening device, and FIG. 6 is a control block diagram showing its internal configuration.
Reference numeral 6-1 denotes a speaker, which employs a known ultrasonic parametric speaker having a sharp beam-like audible range, for example, and radiates a threatening sound of a kind that causes a warning against harmful birds and beasts in a narrow audible range. I am doing so. Note that an ultrasonic parametric speaker means that when an ultrasonic wave modulated with an audible sound signal or the like is radiated into the air, the modulated signal is audible along the ultrasonic wave propagation path as a result of the nonlinear characteristics of the air with respect to the ultrasonic wave. The loudspeaker utilizes the parametric array effect demodulated as, and is characterized by being able to give an audible sound an extremely sharp directivity. However, description of the detailed principle and structure is omitted. 6-2 is a strobe light emitting device that emits a flash for threatening harmful birds and beasts. Reference numeral 6-3 denotes a rotating arm, which supports the speaker 6-1 that integrally fixes and holds the strobe light emitter 6-2 so as to be rotatable at two points, and intimidates the speaker 6-1 and the strobe light emitter 6-2. The output direction can be varied in the vertical direction. The threatening unit 6 is configured by the speaker 6-1, the strobe light emitter 6-2, and the rotating arm 6-3. Reference numeral 7 denotes a motor which is a threatening direction variable portion, and the rotary arm 6-3 is rotationally displaced in the horizontal direction by the rotating operation of the motor. Reference numeral 8 denotes a rotary encoder, which detects the rotational position of the rotary arm 6-3 based on this signal by converting the mechanical displacement accompanying the rotation of the motor 7 into an electrical signal. A threatening direction control unit 9 grasps the direction of the threatening unit 6 based on the output of the rotary encoder 8, and the speaker 6-1 and the strobe 6-2 in the direction of the presence of harmful birds and beasts determined by the approaching body detection device. It controls to direct the threatening stimulus output direction. Reference numeral 10 denotes a control unit that controls the operation of the entire apparatus.

  The operation of the approaching body threatening device configured as described above will be described. When harmful birds and animals approach an approaching body threatening device installed near a crop in a field, first, in the approaching body detection device 1, the presence direction of the harmful birds and beasts with respect to the approaching body threatening device based on the infrared detection result of the infrared pyroelectric sensor 2 Judging. Next, the control unit 10 receives the output signal of the rotary encoder 8, acquires position information about the rotation axis of the motor 7, passes the acquired position information to the threatening direction control unit 9, and starts the rotation operation of the motor 7. When the direction of the threatening stimulus of the speaker 6-1 and the strobe 6-2 constituting the threatening unit 6 coincides with the direction in which the harmful birds and beasts exist by the motor rotation control of the threatening direction control unit 9, the control unit 10 causes the speaker 6-1. The strobe 6-2 is instructed to output a threatening stimulus, and a flashing light such as a threatening sound or xenon light is emitted toward the harmful birds and beasts. In this case, as a threatening sound, for example, a human scream, a dog cry, pink noise, a burst wave of a predetermined frequency audible sound, or the like can be used.

  The present invention is configured as described above, but various implementations other than the above-described embodiments are possible without departing from the scope of the claims. For example, as threatening means constituting the threatening part 6, odor generating means for generating an irritating odor, means for discharging high-pressure water or the like, means for spraying or releasing a stimulant such as capsaicin, etc. can be used.

It is an external view which shows the approach body detection apparatus of this invention Example. It is explanatory drawing showing the detection visual field of the approach body detection apparatus which concerns on an Example of this invention. It is explanatory drawing which shows the approach body detection operation | movement principle which concerns on an Example of this invention. It is explanatory drawing which shows another Example regarding arrangement | positioning of an infrared detection part. It is an external view which shows the approach body threatening apparatus of this invention Example. It is a control block diagram which shows the internal structure of the approaching body threatening apparatus which concerns on an Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Intrusion body detection apparatus 2 Infrared pyroelectric sensor which is an infrared detection part 2-1 to 2-10 Infrared pyroelectric sensor which is an infrared detection part 3 Base body 6 Intimidation part 6-1 Speaker which comprises intimidation part 6-2 Intimidation part Structured strobe light emitting device 6-3 Rotating arm that constitutes a threatening part 7 Motor as a threatening direction variable part 8 Rotary encoder 9 Threatening direction control part 10 Control part 11 Direction detection part N Number of arranged infrared detection parts α Infrared pyroelectric sensor Detection viewing angle θ1 Direction detection resolution

Claims (3)

In an intruder detection device that detects the presence of an intruder by receiving infrared rays emitted by an intruder such as a harmful bird and beast,
An infrared detector that receives infrared rays and outputs a detection signal, a base body in which a plurality of infrared detectors are arranged on the circumference, and an infrared detection signal in the plurality of infrared detectors arranged in the base body are output. A direction detection unit that determines the direction in which the approaching body is present based on the arrangement position of the infrared detection unit,
Infrared detection signals from a plurality of infrared detection units that overlap the detection visual fields of the plurality of infrared detection units arranged on the circumference of the base body, with the infrared detection units adjacent to each other partially overlapping each other. An intruder detection apparatus that determines the direction in which an intruder exists, based on the above. N infrared detectors arranged on the circumference of the base body are arranged with a detection visual field angle α (rad), and a detection visual field formed over 2π (rad) around the base body is a predetermined unit angle. When divided into a plurality of parts by θ1 (rad), the direction in which the intruder exists is determined by the direction detection resolution θ1 (rad) by satisfying the following relationships (1), (2), and (3): Item 1. The entry object detection device according to Item 1.
(1) The detection field angle that overlaps between the infrared detectors adjacent on the circumference of the base body is α− (2 × θ1).
(2) When α / θ1 = n, n is an odd number greater than or equal to 3 (3) θ1 = π / N (rad) In a device that detects the presence of an intruder by receiving infrared rays emitted by an intruder such as a harmful bird and beast, and performs a threatening action toward the detected intruder,
The intruder detection apparatus according to claim 1 or 2, a threatening unit that applies a stimulating action to a sensory organ of the approaching body, a threatening direction variable unit that varies an output direction of a stimulus output from the threatening unit, A threatening direction control unit that variably operates the threatening direction variable unit according to the direction in which the approaching object detected by the approaching object detection device exists,
An intruder threatening device that outputs intimidation stimuli such as sound, light, odor, etc. toward an approaching bug.

Images