JP2013205918A - Security device and method for adjusting the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a security device whose sensor part is easily installed regardless of proficiency and whose accuracy is improved, and a method for adjusting the security device.SOLUTION: A security device 10 acquires a horizontal reference by calculating the shortest distance from a sensor part 11 to a fence 16 by using the sensor part 11. An angular difference detection part acquires a deviation between the acquired horizontal reference and the scanning reference face of the sensor part as an angular difference. The sensor part 11 is installed at the proper position, that is, horizontal position of a wall 15 of a house 13 by making the scanning reference face coincident with the acquired horizontal reference. Whether or not the angular difference detected by the angular difference detection part is an allowable angle or less is output to an external terminal of the security device 10. The terminal displays the determination result output from the security device 10 as information visible at the display part. Thus, it is possible for a user to adjust the position of the sensor part 11 so that the scanning reference face of the sensor part 11 can be made coincident with a horizontal reference while referring to the visible display.

Description

  The present invention relates to a security device and an adjustment method thereof.

  Conventionally, for example, a security device that detects an intruder who has entered a restricted area includes a sensor unit that emits scanning light such as laser light or infrared light. Such a security device needs to adjust the irradiation position of the scanning light by a sensor part with high precision (refer patent document 1). A sensor part irradiates scanning light for every angle according to the resolution peculiar to an apparatus. In the case of a general security device, the sensor unit irradiates scanning light between, for example, a pair of walls and pillars of equipment. The scanning range of the sensor unit is set above and below the gravitational direction with reference to the center of scanning light irradiation in the gravitational direction. Therefore, in order to increase the detection accuracy, the security device is required to match the center of the scanning range in the direction of gravity of the scanning light emitted from the sensor unit with the horizontal line.

  Since conventional security devices are installed in facilities that require a high degree of security, such as airports and factory facilities, they are generally installed with high accuracy by highly skilled professionals. That is, in the case of a facility that requires high security, the installation position of the sensor unit of the security device is adjusted with high accuracy over a long period of time by a skilled specialist.

  However, in recent years, security devices have been widely spread to general households as security awareness has increased in general households. Such a security device used in a general home is required to be low in price and low in performance required as compared with conventional advanced security equipment. For this reason, the resolution of the sensor unit is set to be lower than in the past. Further, such a security device used in a general household is installed by a purchaser, not a specialized trader. For this reason, it is required that the security device for dissemination can easily match the center of the scanning range in the direction of gravity of the sensor unit with the horizontal line even by a general purchaser with low skill level. In particular, when a sensor unit with low resolution is used, the shift of the scanning range has a great influence on the deterioration of detection accuracy. For this reason, it is necessary for a widespread security apparatus to match the center of the scanning range of the scanning light with the horizontal line with high accuracy.

JP 2007-122436 A

  Therefore, the present invention is to provide a security device and an adjustment method thereof in which the sensor unit can be easily installed regardless of the skill level and the accuracy can be improved.

  In the first or second aspect of the invention, the sensor unit installed on the first wall scans the distance from the lower end to the upper end in the direction of gravity in the distance to the second wall facing the first wall. The first wall on which the sensor unit is installed and the second wall facing the first wall are provided perpendicular to the ground and are parallel to each other, such as a house wall and a fence. Therefore, when the distance from the sensor unit to the second wall is scanned, the detected distance changes from decreasing to increasing at any point. The point where the detected distance changes from decreasing to increasing is the point where the distance between the sensor unit installed on the first wall and the second wall is the shortest. A virtual straight line connecting this point and the sensor unit is a horizontal reference that matches the horizontal line if the first wall and the second wall are perpendicular and parallel to the ground. In this way, the horizontal reference is obtained by obtaining the shortest distance from the sensor unit to the second wall using the sensor unit. The difference between the acquired horizontal reference and the center of the scanning range of the sensor unit is acquired as an angle difference. The sensor unit emits scanning light downward and upward from the center of the scanning range in the direction of gravity. That is, the sensor unit irradiates the scanning light at every angle corresponding to the resolution in the scanning range from the lower side to the upper side in the direction of gravity. By matching the center of the scanning range with the horizontal reference, the sensor unit is installed at an accurate position. Whether or not the acquired angle difference is equal to or smaller than the allowable angle is output to the outside and displayed, for example, visually. Therefore, the installer who installs the sensor unit can adjust the position of the sensor unit so that the center of the scanning range of the sensor unit coincides with the horizontal reference while referring to the visible display. Therefore, the center of the scanning range of the sensor unit and the horizontal reference can be easily matched regardless of the skill level, and the detection accuracy of the intruder can be improved.

The schematic diagram which shows the side view of the house which applied the security device by one Embodiment The schematic diagram which shows the planar view of the house which applied the security device by one Embodiment The schematic diagram which shows the scanning light irradiated from the sensor part of the security device by one Embodiment 1 is a schematic block diagram showing a processing unit and an external terminal of a security device according to an embodiment. The schematic diagram which shows the distance for every scanning angle acquired with the security apparatus by one Embodiment The schematic diagram which shows the state which the scanning reference plane and horizontal reference | standard of a sensor part have shifted | deviated in the security apparatus by one Embodiment. The schematic diagram which shows the state which the scanning reference plane and horizontal reference | standard of a sensor part have shifted | deviated in the security apparatus by one Embodiment. The schematic diagram which shows the state with which the scanning reference plane and horizontal reference | standard of a sensor part correspond in the security apparatus by one Embodiment. Schematic diagram showing the flow of processing of the security device according to one embodiment

Hereinafter, an embodiment of a security device will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the security device 10 includes a sensor unit 11 and a processing unit 12. The security device 10 detects an intruder who enters the site 14 of the house 13. The sensor unit 11 of the security device 10 is attached to the wall 15 of the house 13. The sensor unit 11 irradiates scanning light 17 such as laser light toward a wall 16 facing the wall 15 of the house 13. In this case, the wall 15 of the house 13 corresponds to the first wall in the claims, and the ridge 16 corresponds to the second wall in the claims. Here, the first wall is not limited to the wall 15 of the house 13 and may be a wall surface such as a gate pillar or a fence. That is, the wall to which the sensor unit 11 can be attached corresponds to the first wall as well as the wall of the house. The second wall is not limited to the ridge 16 but may be any object that can measure the distance from the first wall.

  In the case of a normal house 13, the wall 15 and the ridge 16 of the house 13 both extend in a gravitational direction substantially perpendicular to the horizontal plane of the ground 18, so-called a vertical direction, although some errors are included. For this reason, the security device 10 according to the present embodiment is premised on the wall 15 and the fence 16 of the house 13 that are provided substantially perpendicular to the ground 18, although errors that cannot be excluded are included. The sensor unit 11 may be configured to irradiate infrared rays or the like instead of the laser light.

  The sensor unit 11 includes an irradiation unit 21 and a light receiving unit 22 as shown in FIG. The sensor unit 11 scans the distance to an obstacle such as an intruder by receiving the light emitted from the irradiation unit 21 by the light receiving unit 22. The sensor unit 11 scans downward and upward in the direction of gravity around the scanning reference plane 25 that is the center of the scanning range. At this time, the sensor unit 11 scans a distance to an opposing object such as the heel 16 for each predetermined angle range according to a preset vertical resolution. For example, as shown in FIG. 3, when the position immediately below the sensor unit 11 is 0 ° and the position directly above the sensor unit is 180 °, the scanning reference plane 25 that is the center of the scanning range of the sensor unit 11 is set at a position of 90 °. Is done. Here, the vertical resolution means the interval, that is, the angular range of the scanning light emitted by the sensor unit 11. The sensor unit 11 does not continuously scan the distance from the bottom to the top in the direction of gravity, but scans the distance at a predetermined interval for each preset angle. In the case of the present embodiment, the sensor unit 11 scans the distance to the object by irradiating the scanning light 17 every 1 to several degrees. That is, the vertical resolution of the sensor unit 11 of the present embodiment is from a fraction of a degree to a few degrees. In the present embodiment, the planar scanning reference surface 25 is described as an example of the center of the scanning range, but the center of the scanning range may be a linear scanning reference line.

  The sensor unit 11 irradiates the scanning light 17 not only in the direction of gravity but also in the plane direction as shown in FIG. 2 according to the preset plane direction resolution. Specifically, the sensor unit 11 irradiates scanning light in a range of 0 ° to 180 ° around the sensor unit 11 in a plurality of scanning planes set according to the vertical resolution. Similarly to the vertical direction, the sensor unit 11 irradiates the scanning light 17 on the scanning plane at intervals corresponding to the resolution in the plane direction, that is, an angular range. In the case of the present embodiment, the sensor unit 11 scans the distance to the object by irradiating the scanning light 17 so as to divide the set scanning plane every several degrees to several degrees. Accordingly, the sensor unit 11 sets a plurality of scanning planes according to the vertical resolution from the lower end to the upper end in the vertical direction, and irradiates the scanning light 17 in an angular range corresponding to the horizontal resolution for each scanning plane.

  These vertical resolution and horizontal resolution are set for each capability of the security device 10. That is, in equipment that requires high security, the sensor unit 11 having extremely high vertical resolution and horizontal resolution is used. On the other hand, in the case of the popular version of the home security device premised on this embodiment, the vertical resolution and the horizontal resolution are set to about a few degrees to several degrees as described above.

  The processing unit 12 has a processing unit 31 as shown in FIG. The processing unit 12 is connected to the sensor unit 11. The processing unit 12 may be provided separately from the sensor unit 11 or may be provided integrally with the sensor unit 11. The processing unit 31 includes a microcomputer having a CPU, a ROM, and a RAM. Further, the processing unit 12 may have an external storage unit 32 or the like. The external storage unit 32 includes, for example, a nonvolatile memory, a magnetic or optical storage medium, or the like. The processing unit 12 implements the distance acquisition unit 33, the horizontal reference acquisition unit 34, the angle difference detection unit 35, and the output unit 36 by software by executing a computer program stored in the ROM or the external storage unit 32. ing. The distance acquisition unit 33, the horizontal reference acquisition unit 34, the angle difference detection unit 35, and the output unit 36 may be realized in hardware, or may be realized in cooperation with hardware and software.

  The distance acquisition unit 33 acquires the distance to the object based on the result obtained by scanning the object by the sensor unit 11. The distance acquisition unit 33 acquires the distance to the object based on the time from the irradiation of the scanning light 17 by the irradiation unit 21 of the sensor unit 11 to the reception of the scanning light 17 by the light receiving unit 22, for example.

  The horizontal reference acquisition unit 34 acquires a horizontal reference that matches the horizontal line. As described above, the sensor unit 11 scans from the lower side to the upper side in the direction of gravity. When scanning the opposing ridge 16 with the sensor unit 11 provided on the wall 15, the sensor unit 11 scans from the lower end to the upper end of the ridge 16. The distance acquisition unit 33 acquires the distance from the sensor unit 11 to the heel 16 based on the result of scanning by the sensor unit 11. At this time, the distance acquired by the distance acquisition unit 33 changes as shown in FIG. In this specification, the horizontal line means a straight line that intersects perpendicularly to the direction of gravity.

  When the sensor unit 11 scans from 0 ° in FIG. 1 which is the lower end in the direction of gravity to 180 ° in FIG. 1 which is the upper end, the sensor unit 11 first detects the distance to the ground 18 directly below. Then, as the scanning range of the sensor unit 11 moves upward, the distance acquired by the distance acquisition unit 33 increases secondarily from the ground 18 directly below to the lower end 41 of the root of the ridge 16. When the lower end 41 of the heel 16 is reached, the sensor unit 11 detects the distance from the lower end 41 to the upper end 42 of the heel 16 to the heel 16. At this time, when the sensor unit 11 scans from the lower end 41 to the upper end 42 of the ridge 16, the distance acquired by the distance acquisition unit 33 changes so as to draw a quadratic curve, that is, an arc. That is, the distance acquired by the distance acquisition unit 33 is maximum at the lower end 41 of the heel 16 and gradually decreases toward the shortest distance Lmin where the distance to the heel 16 is the shortest. The distance acquired by the distance acquisition unit 33 gradually increases from the shortest distance Lmin to the upper end 42 of the kite 16. When the scanning range of the sensor unit 11 is above the upper end 42 of the ridge 16, the ridge 16 disappears, and the distance acquired by the distance acquisition unit 33 is infinite. In this way, the sensor unit 11 and the distance acquisition unit 33 have the presence of the heel 16 between the “inflection point 1” corresponding to the lower end 41 of the heel 16 and the “inflection point 2” corresponding to the upper end 42 of the heel 16. Recognize

  The distance to the heel 16 acquired by the distance acquisition unit 33 is the shortest distance Lmin at a certain position. The position where the distance acquired by the distance acquisition unit 33 is the shortest is the position where the distance between the wall 15 and the ridge 16 is the shortest, and can be considered horizontal with the ground 18. Therefore, the horizontal reference acquisition unit 34 acquires the scanning angle at which the shortest distance Lmin is obtained as the horizontal reference θh based on the distance from the sensor unit 11 to the heel 16 acquired by the distance acquisition unit 33. As described above, the sensor unit 11 scans at a plurality of positions according to the horizontal resolution on the scanning plane. Therefore, as the shortest distance Lmin acquired by the horizontal reference acquisition unit 34, an average value of distances acquired in each scanning plane may be used, or a distance acquired at a specific scanning angle of each scanning plane may be used.

  The angle difference detection unit 35 detects an angle difference Δθ between the horizontal reference θh acquired by the horizontal reference acquisition unit 34 and the scanning reference surface 25 in the gravity direction of the sensor unit 11. As described above, the sensor unit 11 scans the distance from the lower side to the upper side in the direction of gravity. At this time, the scanning range of the sensor unit 11 is set in advance to a predetermined range as shown in FIGS. 1 and 3. That is, the sensor unit 11 has a scanning range set downward and upward in the direction of gravity with the scanning reference plane 25 as the center. If the scanning reference plane 25 is different from the horizontal line of the ground 18, the scanning range by the sensor unit 11 is not uniform between the lower side and the upper side in the direction of gravity, and there is a possibility that the accuracy is lowered and the scanning range is lacking. For this reason, the scanning reference plane 25 of the sensor unit 11 is required to match the horizontal line as much as possible. Therefore, the angle difference detection unit 35 detects the angle difference Δθ between the horizontal reference θh acquired by the horizontal reference acquisition unit 34 and the scanning reference plane 25. When the detected angle difference Δθ is large as shown in FIGS. 6 and 7, it can be said that the mounting angle of the sensor unit 11 to the wall 15 is inappropriate. On the other hand, when the detected angle difference Δθ is small as shown in FIG. 8, it can be said that the mounting angle of the sensor unit 11 to the wall 15 is appropriate. Therefore, the angle difference detection unit 35 determines whether or not the detected angle difference Δθ is equal to or less than a preset allowable angle θa.

  The output unit 36 outputs the angle difference Δθ detected by the angle difference detection unit 35 to the outside. The processing unit 12 of the security device 10 is connected to an external terminal 50 as shown in FIG. Here, the terminal 50 is, for example, a PDA (Personal Digital Assistant) or a notebook computer. The terminal 50 is not limited to these, and may be a mobile phone or a smartphone. The output unit 36 establishes wireless or wired communication with these terminals 50. As a result, the angle difference Δθ detected by the angle difference detection unit 35 is output to the terminal 50 owned by the installer of the security device 10 (hereinafter referred to as “user”) via the output unit 36. The terminal 50 includes a display unit 51 such as a liquid crystal display. Information regarding the angle difference Δθ output from the output unit 36 is visually displayed on the display unit 51 of the terminal 50. Therefore, the user of the security device 10 can adjust the attachment angle of the sensor unit 11 to the wall 15 while referring to the information regarding the angle difference Δθ displayed on the terminal 50.

Next, the procedure for attaching the security device 10 to the wall 15 and adjusting the attachment angle according to the above configuration will be described with reference to FIG.
The user of the security device 10 temporarily fixes the sensor unit 11 to the wall 15 of the house 13 (S101). In the case of the present embodiment, the security device 10 is for dissemination to general households. Therefore, the security device 10 is installed by the purchaser himself. The sensor unit 11 is configured to be able to turn up and down around a fulcrum 60 as shown in FIGS. Thereby, the sensor part 11 will be in the state which can change the position of the scanning reference plane 25 up and down in the gravity direction. As described above, the sensor unit 11 is temporarily fixed to the wall 15 of the house 13 in a state in which the sensor unit 11 can turn up and down around the fulcrum 60.

  When the sensor unit 11 is temporarily fixed to the wall 15 of the house 13, the sensor unit 11 scans from the lower end 41 to the upper end 42 of the ridge 16 facing the wall 15 (S102). Specifically, the user turns on the security device 10 after temporarily fixing the sensor unit 11. As a result, the security device 10 is activated. When the security device 10 is activated, the user executes processing for initial setting, for example. This initial setting process is executed in accordance with a computer program stored in the ROM or the external storage unit 32. The process for initial setting includes a function for setting the scanning reference plane 25 of the sensor unit 11 horizontally. Therefore, the user activates the security device 10 and executes a program for initial setting. Specifically, the user temporarily fixes the sensor unit 11 to the wall 15 so that the scanning reference surface 25 of the sensor unit 11 is parallel to the ground 18, that is, the scanning reference surface 25 is as close as possible to the horizontal line. . When processing for initial setting is executed in this state, the sensor unit 11 scans from the lower end 41 to the upper end 42 of the bag 16.

  When the sensor unit 11 scans from the lower end 41 to the upper end 42 of the heel 16, the distance acquisition unit 33 acquires the distance from the sensor unit 11 to the heel 16 from the lower end 41 to the upper end 42 of the heel 16 (S103). That is, the distance acquisition unit 33 acquires a distance from the lower end 41 to the upper end 42 of the heel 16 for each angle set according to the resolution of the sensor unit 11. Thereby, the distance from the sensor unit 11 to the flange 16 is acquired as a substantially circular arc-shaped quadratic curve as shown between the inflection point 1 and the inflection point 2 in FIG.

  When the distance from the sensor unit 11 to the heel 16 is acquired, the horizontal reference acquisition unit 34 specifies a position where the value of the distance from the sensor unit 11 to the heel 16 changes from decrease to increase (S104). The distance value acquired by the distance acquisition unit 33 gradually decreases as the scanning angle moves from the lower end 41 to the upper end 42 of the heel 16. Then, the acquired distance value starts to increase at the shortest distance Lmin where the distance from the sensor unit 11 to the heel 16 is the shortest. Thus, the distance from the sensor unit 11 to the heel 16 acquired by the distance acquisition unit 33 changes from decrease to increase at the shortest distance Lmin. As described above, the path of the scanning light 17 at the shortest distance Lmin, which is a boundary where the acquired distance value starts to increase, is that the wall 15 and the fence 16 of the house 13 are perpendicular to the ground 18 and parallel to each other. Is assumed to be parallel to the ground surface 18, that is, the horizontal line. For this reason, the horizontal reference acquisition unit 34 sets the scanning angle of the scanning light 17 having the shortest distance Lmin to the horizontal reference θh corresponding to the horizontal line (S105).

  When the horizontal reference θh is acquired by the horizontal reference acquisition unit 34, the angle difference detection unit 35 detects the angle difference Δθ between the horizontal reference θh acquired in S105 and the scanning reference plane 25 of the sensor unit 11 (S106). The scanning reference plane 25 of the sensor unit 11 is set at a position where the scanning angle is 90 ° as a value unique to the sensor unit 11 if, for example, the scanning range is 0 ° to 180 °. Therefore, the angle difference detection unit 35 detects an angle difference Δθ between the scanning reference plane 25 where the scanning angle is set at a position of 90 ° and the horizontal reference θh acquired in S105. As shown in FIGS. 6 and 7, the temporarily fixed sensor unit 11 is displaced between the scanning reference plane 25 and the horizontal reference θh. The deviation between the scanning reference plane 25 and the horizontal reference θh corresponds to an angle difference Δθ.

  The angle difference detector 35 determines whether or not the detected angle difference Δθ is equal to or smaller than a preset allowable angle θa (S107). That is, the angle difference detection unit 35 determines whether or not the deviation between the temporarily fixed scanning reference surface 25 of the sensor unit 11 and the acquired horizontal reference θh is equal to or smaller than the allowable angle θa. Although the user attaches the sensor unit 11 to the wall 15 so that the scanning reference surface 25 of the sensor unit 11 approaches the horizontal during temporary fixing, the deviation between the scanning reference surface 25 and the horizontal reference θh is less than the allowable angle θa. rare. Therefore, the sensor unit 11 requires fine adjustment of the mounting angle. Prior to fine adjustment of the mounting angle of the sensor unit 11, the angle difference detection unit 35 determines whether or not the angle difference Δθ is equal to or less than the allowable angle θa.

  If it is determined in S107 that the angle difference Δθ is equal to or smaller than the allowable angle θa (S107: Yes), the output unit 36 outputs the angle difference Δθ to the external terminal 50 (S108). The output unit 36 may output together with the angle difference Δθ that the angle difference Δθ is equal to or smaller than the allowable angle θa. The external terminal 50 visually displays on the display unit 51 that the angle difference Δθ output from the output unit 36 and that the angle difference Δθ is equal to or smaller than the allowable angle θa (S109).

  The user refers to the display such as the visible angle difference Δθ on the display unit 51 of the terminal 50 and permanently fixes the sensor unit 11 (S110). That is, when it is determined in S107 that the angle difference Δθ is equal to or smaller than the allowable angle θa, it means that the mounting position of the sensor unit 11 is appropriate. Therefore, the user permanently fixes the position of the sensor unit 11 in the direction of gravity using a lock mechanism (not shown) of the sensor unit 11 or the like. Accordingly, the sensor unit 11 is fixed to the wall 15 in a state where the angle difference Δθ between the scanning reference surface 25 of the sensor unit 11 and the horizontal reference θh is equal to or less than the allowable angle θa.

  On the other hand, when it is determined in S107 that the angle difference Δθ is larger than the allowable angle θa (S107: No), the output unit 36 outputs the angle difference Δθ to the external terminal 50 (S111). The output unit 36 may output together with the angle difference Δθ that the angle difference Δθ is larger than the allowable angle θa. The external terminal 50 visually displays on the display unit 51 that the angle difference Δθ output from the output unit 36 and that the angle difference Δθ is larger than the allowable angle θa (S112).

  The user refers to the display such as the visible angle difference Δθ on the display unit 51 of the terminal 50 and adjusts the mounting position of the sensor unit 11 (S113). That is, when it is determined in S107 that the angle difference Δθ is larger than the allowable angle θa, it means that the mounting position of the sensor unit 11 is inappropriate. Therefore, the user turns the temporarily fixed sensor unit 11 around the fulcrum 60. That is, the user turns the sensor unit 11 so that the angle difference Δθ between the scanning reference surface 25 of the sensor unit 11 and the horizontal reference θh becomes small and approaches the allowable angle θa. When the user adjusts the sensor unit 11, for example, the user inputs from the terminal 50 that the adjustment process has been completed. If there is an input indicating that the adjustment process has been completed, the processing unit 12 returns to S102 again and repeats the processes after S102.

  The user repeats the processes in and after S102 until the angle difference Δθ between the scanning reference plane 25 and the horizontal reference θh becomes equal to or smaller than the allowable angle θa. Thereby, in the sensor unit 11 temporarily fixed first, the angle difference Δθ between the scanning reference plane 25 and the horizontal reference θh is adjusted to be equal to or smaller than the allowable angle θa.

  As described above, the security device 10 according to the embodiment obtains the horizontal reference θh by obtaining the shortest distance Lmin from the sensor unit 11 to the flange 16 using the sensor unit 11. The angle difference detection unit 35 acquires the deviation between the acquired horizontal reference θh and the scanning reference surface 25 of the sensor unit 11 as the angle difference Δθ. By matching the scanning reference plane 25 with the acquired horizontal reference θh, the sensor unit 11 is installed at an appropriate position of the wall 15 of the house 13, that is, horizontally. Whether or not the angle difference Δθ detected by the angle difference detection unit 35 is equal to or smaller than the allowable angle θa is output to the terminal 50 outside the security device 10. The terminal 50 displays the determination result output from the security device 10 on the display unit 51 as visible information. Therefore, the user who installs the sensor unit 11 can adjust the position of the sensor unit 11 so that the scanning reference plane 25 of the sensor unit 11 and the horizontal reference θh coincide with each other while referring to the visible display. it can. Therefore, the scanning reference plane 25 of the sensor unit 11 and the horizontal reference θh can be easily matched regardless of the skill level and the resolution of the sensor unit 11, and the detection accuracy of the intruder can be improved.

  The present invention described above is not limited to the above-described embodiment, and can be applied to various embodiments without departing from the gist thereof.

  In the drawing, 10 is a security device, 11 is a sensor unit, 15 is a wall (first wall), 16 is a ridge (second wall), 17 is scanning light, 33 is a distance acquisition unit, 34 is a horizontal reference acquisition unit, 35 Denotes an angle difference detection unit, and 36 denotes an output unit.

Claims (2)

A sensor unit that is attached to a first wall extending in the direction of gravity and that emits scanning light;
The sensor unit scans from the lower end to the upper end in the gravitational direction of the second wall extending in the gravitational direction parallel to the first wall at a position away from the first wall, and an angle corresponding to the resolution of the sensor unit A distance acquisition unit for acquiring a distance from the sensor unit to the second wall every time;
A horizontal reference acquisition unit that acquires a position where the value of the distance from the sensor unit acquired by the distance acquisition unit to the second wall changes from a decrease to an increase as a horizontal reference horizontal to the ground;
An angle difference detection unit that detects an angle difference between a center of a scanning range in the gravity direction of scanning light emitted from the sensor unit and the horizontal reference acquired by the horizontal reference acquisition unit;
An output unit for outputting the angle difference detected by the angle difference detection unit to the outside;
A security device comprising: Temporarily fixing a sensor unit that emits scanning light to the first wall extending in the direction of gravity;
The sensor unit that has been temporarily processed scans from the lower end to the upper end in the gravitational direction of the second wall that extends in the gravitational direction in parallel with the first wall at a position away from the first wall, thereby achieving the resolution of the sensor unit. Obtaining a distance from the sensor unit to the second wall for each corresponding angle;
Acquiring the position where the value of the acquired distance from the sensor unit to the second wall changes from decrease to increase as a horizontal reference horizontal to the ground;
Detecting the angular difference between the center of the scanning range in the gravity direction of the scanning light emitted from the sensor unit and the acquired horizontal reference;
Determining whether or not the detected angle difference is less than or equal to a preset allowable angle, and visually displaying the determination result;
Based on the visually displayed determination result, when the angular difference is less than or equal to the allowable angle, the step of permanently fixing the temporarily fixed sensor unit;
A step of changing the position of the temporarily fixed sensor unit to a side where the angular difference becomes smaller when the angular difference is larger than the allowable angle based on the visually displayed determination result;
A security device adjustment method including:

Images