JP2019197388A - Detection device, detection system, communication system, control method of detection device, and program - Google Patents

Abstract

To provide a detection device, a detection system, a communication system, a control method of the detection device, and a program, capable of reducing consumption power.SOLUTION: In a communication system 10, a detection device 1 includes a light emitting portion 11, a light receiving portion 12, a control portion 13, and a determination portion 14. The light emitting portion 11 emits detection light. The light receiving portion 12 receives the detection light from the light emitting portion 11. The control portion 13 controls at least the light emitting portion 11 so that a first period and a second period are alternately repeated. The determination portion 14 determines a state of an object on the basis of a light reception level of the detection light received by the light receiving portion 12. The first period is a period during which both the light emitting operation in which the light emitting portion 11 emits the detection light and the light receiving operation in which the light receiving portion 12 receives the detection light are performed. The second period is a period during which at least one of the light emitting operation and the light receiving operation is not performed.SELECTED DRAWING: Figure 1

Description

  The present disclosure generally relates to a detection device, a detection system, a communication system, a control method for the detection device, and a program. And the program.

  Conventionally, a window lock sensor for detecting a locked / unlocked state of a crescent lock is known (see, for example, Patent Document 1). The window lock sensor described in Patent Literature 1 includes a detection unit, a wireless communication unit, and a control unit. The detection unit detects the locking / unlocking state of the operation lever of the crescent lock. The wireless communication unit transmits a predetermined wireless signal to the external device when the unlocking state is detected by the detection unit. The control unit controls the wireless communication unit based on the output of the detection unit.

JP 2012-160117 A

  In a window lock sensor (detection device) as described in Patent Document 1, a structure in which operating power is supplied by a battery is generally used, and reduction of power consumption is desired.

  An object of the present disclosure is to provide a detection device, a detection system, a communication system, a detection device control method, and a program capable of reducing power consumption.

  A detection device according to an aspect of the present disclosure includes a light emitting unit, a light receiving unit, a control unit, and a determination unit. The light emitting unit emits detection light. The light receiving unit receives the detection light from the light emitting unit. The control unit controls at least the light emitting unit such that the first period and the second period are alternately repeated. The discriminating unit discriminates the state of the object based on the light receiving level of the detection light received by the light receiving unit. The first period is a period in which both a light emitting operation in which the light emitting unit emits the detection light and a light receiving operation in which the light receiving unit receives the detection light are performed. The second period is a period in which at least one of the light emitting operation and the light receiving operation is not performed.

  A detection system according to an aspect of the present disclosure includes the above-described detection device and a reflection member. The reflection member reflects the detection light from the light emitting unit to the light receiving unit.

  A communication system according to an aspect of the present disclosure includes the above-described detection device and a reception device. The receiving device receives the information from the communication unit.

  A control method for a detection device according to an aspect of the present disclosure is a control method for a detection device including a light emitting unit, a light receiving unit, a control unit, and a determination unit. The light emitting unit emits detection light. The light receiving unit receives the detection light from the light emitting unit. The control unit controls at least the light emitting unit such that the first period and the second period are alternately repeated. The discriminating unit discriminates the state of the object based on the light receiving level of the detection light received by the light receiving unit. The first period is a period in which both a light emitting operation in which the light emitting unit emits the detection light and a light receiving operation in which the light receiving unit receives the detection light are performed. The second period is a period in which at least one of the light emitting operation and the light receiving operation is not performed.

  A program according to an aspect of the present disclosure is a program for causing a computer system to execute the above-described detection apparatus control method.

  According to the present disclosure, there is an effect that power consumption can be reduced.

FIG. 1 is a block diagram of a communication system including a detection device according to Embodiment 1 of the present disclosure. 2A is a cross-sectional view taken along the line AA in FIG. 2C. 2B is a cross-sectional view taken along line BB in FIG. 2C. FIG. 2C is a plan view of a detection system including the above-described detection device. 3A is a front view of a light guide member included in the above-described detection device, FIG. 3B is a bottom view, and FIG. 3C is a left side view. FIG. 4A is a schematic view of a state in which the detection system is attached to the first object. FIG. 4B is a schematic view of a state in which the detection device is attached to the second object. FIG. 4C is a schematic diagram of the state in which the detection device is attached to the third object. FIG. 5 is a timing chart for explaining the operation of the above-described detection apparatus. FIG. 6A is a perspective view of a detection device according to Modification 1 of Embodiment 1 of the present disclosure. FIG. 6B is an exploded perspective view of the above-described detection device. FIG. 7A is a perspective view of a detection device according to Modification 2 of Embodiment 1 of the present disclosure. FIG. 7B is an exploded perspective view of the above-described detection device. FIG. 8A is a perspective view of a detection device according to Modification 3 of Embodiment 1 of the present disclosure. FIG. 8B is a perspective view of a detection device according to Modification 4 of Embodiment 1 of the present disclosure. FIG. 8C is a perspective view of a detection device according to Modification 5 of Embodiment 1 of the present disclosure. FIG. 8D is a perspective view of a detection device according to Modification 6 of Embodiment 1 of the present disclosure. FIG. 9 is a cross-sectional view of the detection device according to the second embodiment of the present disclosure.

(Embodiment 1)
(1) Overview Hereinafter, an overview of the detection device, the detection system, and the communication system according to the first embodiment will be described with reference to FIGS. 1 and 2A to 2C.

  The detection device 1 according to the present embodiment includes a light emitting unit 11, a light receiving unit 12, a control unit 13, a determination unit 14, and a light guide member 16. The light emitting unit 11 includes, for example, a light emitting diode (LED) that emits infrared light. That is, the light emitting unit 11 emits (emits) infrared light as the detection light LD1 (see FIG. 2A). The light receiving unit 12 includes, for example, a photodiode as an infrared detection element. The light receiving unit 12 receives (detects) infrared rays from the light emitting unit 11 with a photodiode.

  The control unit 13 controls at least the light emitting unit 11 so that the first period T1 (see FIG. 5) and the second period T2 (see FIG. 5) are alternately repeated. The first period T1 is a period in which both the light emitting operation in which the light emitting unit 11 emits the detection light LD1 and the light receiving operation in which the light receiving unit 12 receives the detection light LD1 are performed. The second period T2 is a period during which at least one of the light emitting operation and the light receiving operation is not performed. In the present embodiment, the second period T2 is a period in which only the light emitting operation is not performed, and the light receiving operation is performed through the first period T1 and the second period T2. In the present embodiment, the first period T1 is shorter than the second period T2.

  The determination unit 14 determines the state of the object 4 based on the light reception level of the detection light LD1 received by the light receiving unit 12. The object 4 is, for example, a crescent lock 40 (see FIG. 4A) attached to a sliding window such as a detached house. That is, the determination unit 14 determines whether the crescent lock 40 is in the locked state or in the unlocked state based on the light reception level of the detection light LD1 received by the light receiving unit 12. Here, the “light receiving level” is a difference between the first light receiving level of the light received by the light receiving unit 12 in the first period T1 and the second light receiving level of the light received by the light receiving unit 12 in the second period T2. . The “locked state” here refers to a state where the sliding window cannot be opened / closed by the crescent lock 40, and the “unlocked state” refers to a state where the sliding window can be opened / closed.

  The light guide member 16 guides the detection light LD1 from the light emitting unit 11 to the reflection member 3 (described later), and guides the detection light LD1 reflected by the reflection member 3 to the light receiving unit 12. In the present embodiment, the light guide member 16 includes both the first light guide unit 161 and the second light guide unit 162. The first light guide 161 receives the detection light LD1 from the light emitting unit 11 and guides the detection light LD1 in the first direction. The second light guide 162 receives the detection light LD1 from a second direction different from the first direction, and guides the detection light LD1 to the light receiving unit 12. In the present embodiment, the direction of the detection light LD1 from the first light guide 161 toward the reflecting member 3 is the first direction when viewed from the direction orthogonal to the direction in which the first light guide 161 and the second light guide 162 are arranged. The direction of the detection light LD1 from the reflecting member 3 toward the second light guide unit 162 is the second direction.

  The detection system 20 according to the present embodiment includes the detection device 1 and the reflection member 3. That is, the detection system 20 according to the present embodiment is a reflection type, and the detection light LD1 emitted from the light emitting unit 11 of the detection device 1 is reflected by the reflection member 3, and the reflected detection light LD1 is received. This is a structure in which the unit 12 receives light. In this embodiment, the reflecting member 3 has recursiveness. Here, “recursiveness” means that light (for example, detection light LD1) incident on the reflecting member 3 when viewed from a certain direction (for example, a direction perpendicular to the paper surface of FIGS. 2A and 2B) is reflected on the reflecting member 3. Means to reflect in the same direction as the incident direction. Further, “having recursion” here means that the retroreflective component of the detection light LD1 from the light emitting unit 11 is larger than the specular reflection component.

  A communication system 10 according to the present embodiment includes a detection device 1 and a reception device 2. The detection apparatus 1 further includes a communication unit 15 that transmits information related to the determination result of the determination unit 14 (hereinafter also referred to as “discrimination information”). The receiving device 2 receives the discrimination information from the communication unit 15. Communication between the receiving device 2 and the communication unit 15 is, for example, wireless communication. That is, the communication unit 15 transmits a radio signal including the discrimination information to the receiving device 2.

(2) Details Hereinafter, details of the detection device, the detection system, and the communication system according to the first embodiment will be described with reference to FIGS. 1, 2A to 2C, FIGS. 3A to 3C, and FIG. 4A.

(2.1) Crescent lock First, the crescent lock 40 that is the object 4 of the detection device 1 according to the present embodiment will be described with reference to FIG. 4A.

  The crescent lock 40 includes a crescent body 41, an operation lever 42, and a crescent receiver.

  The operation lever 42 is attached to the crescent body 41 and is rotatable with respect to the crescent body 41. The crescent body 41 and the operation lever 42 are attached to one window frame 100 of the sliding window, and the crescent receptacle is attached to the other window frame of the sliding window.

  In the crescent lock 40, the hooking portion 421 of the operation lever 42 is hooked on the crescent receiver, and the locked state is brought about, and the hooking portion 421 is removed from the crescent receiver and the unlocked state is brought about.

  In the detection device 1 according to the present embodiment, the crescent lock 40 is “locked” based on the light reception level of the detection light LD1 received by the light receiving unit 12 that changes according to the position of the operation lever 42 of the crescent lock 40. Or whether it is in the “unlocked state”.

(2.2) Configuration of Detection Device Next, the configuration of the detection device 1 according to the present embodiment will be described with reference to FIG.

  The detection device 1 includes a light emitting unit 11, a light receiving unit 12, a control unit 13, a determination unit 14, and a communication unit 15.

  The light emitting unit 11 includes, for example, a light emitting diode that emits infrared light. The light emitting diode is mounted on a substrate 18 (described later). In accordance with the first control signal from the control unit 13, the light emitting unit 11 alternately repeats a first period T1 (see FIG. 5) for irradiating infrared rays and a second period T2 (see FIG. 5) for irradiating infrared rays. In other words, the light emitting unit 11 alternately repeats the first period T1 in which the light emission operation for emitting the detection light LD1 is performed and the second period T2 in which the light emission operation is not performed.

  The light receiving unit 12 includes, for example, a photodiode as an infrared detection element that detects infrared rays. The photodiode is mounted on the substrate 18. The light receiving unit 12 receives the detection light LD1 from the light emitting unit 11, and outputs a first voltage signal corresponding to the light reception level of the detection light LD1. In the present embodiment, the light receiving unit 12 performs a light receiving operation through the first period T1 and the second period T2.

  The communication unit 15 is a communication interface for communicating with the receiving device 2. For example, the communication unit 15 performs wireless communication with the receiving device 2. That is, the communication unit 15 transmits a radio signal including information (discrimination information) related to the determination result of the determination unit 14 to the receiving device 2.

  The control unit 13 controls the light emitting unit 11 and the communication unit 15. The control unit 13 causes the light emitting unit 11 to perform a light emitting operation in the first period T1 by outputting a first control signal to the light emitting unit 11. In other words, the control unit 13 controls at least the light emitting unit 11 so that the first period T1 and the second period T2 are alternately repeated. In the present embodiment, the first period T1 is a period in which both the light emitting operation by the light emitting unit 11 and the light receiving operation by the light receiving unit 12 are performed. The second period T2 is a period in which only the light emitting operation is not performed, and the light receiving operation is performed through the first period T1 and the second period T2. The control unit 13 causes the communication unit 15 to transmit a wireless signal including the discrimination information.

  The determination unit 14 determines the state of the object 4 (the crescent lock 40) based on the light reception level of the detection light LD1 received by the light receiving unit 12. That is, the determination unit 14 determines whether the crescent lock 40 is in the locked state or in the unlocked state based on the light reception level of the detection light LD1 received by the light receiving unit 12. The operation of the determination unit 14 will be described in detail in the column “(4.2) Determination operation”.

  The control unit 13 and the determination unit 14 are configured by a microcomputer having a processor and a memory. That is, the control unit 13 and the determination unit 14 are realized by a computer system having a processor and a memory. And a computer system functions as the control part 13 and the discrimination | determination part 14 when a processor runs an appropriate program. The program may be recorded in advance in a memory, or may be provided by being recorded through a telecommunication line such as the Internet or a non-transitory recording medium such as a memory card.

(2.3) Structure of Detection Device Next, the structure of the detection device 1 according to this embodiment will be described with reference to FIGS.

  The detection device 1 further includes a light guide member 16, a housing 17, and a substrate 18.

  The light guide member 16 is formed of a light transmissive material such as an acrylic resin, for example. As illustrated in FIGS. 3A to 3C, the light guide member 16 includes a first light guide part 161, a second light guide part 162, an incident suppression part 163, and a pair of attachment parts 164 and 165.

  The 1st light guide part 161 is a rod shape long in one direction (left-right direction in FIG. 3B). The cross-sectional shape in the longitudinal direction of the 1st light guide part 161 is a rectangular shape. The first light guide 161 has a first end 1611 and a second end 1612 located at both ends in the longitudinal direction. The first end portion 1611 is provided with an incident surface 1611A and a first reflecting surface 1611B. The second end portion 1612 is provided with an emission surface 1612A and a second reflection surface 1612B.

  Each of the entrance surface 1611A and the exit surface 1612A is a flat surface. The incident surface 1611A faces the light emitting unit 11 in a state where the light guide member 16 is attached to the substrate 18 (see FIG. 2A). Further, the emission surface 1612A faces the reflecting member 3 attached to the operation lever 42 of the crescent lock 40 in a state where the detection device 1 is attached to the window frame 100 (see FIG. 4A). The first reflecting surface 1611B includes two inclined surfaces having different inclination angles with respect to the incident surface 1611A, and reflects the detection light LD1 incident from the incident surface 1611A toward the longitudinal direction of the first light guide 161. The second reflecting surface 1612B is inclined obliquely outward from the second end portion 1612 toward the first end portion 1611. The second reflection surface 1612B reflects the detection light LD1 that has passed through the first light guide 161 toward the emission surface 1612A.

  Similar to the first light guide 161, the second light guide 162 has a rod shape that is long in one direction (the left-right direction in FIG. 3B). The cross-sectional shape in the longitudinal direction of the 2nd light guide part 162 is a rectangular shape. The 2nd light guide part 162 has the 1st end part 1621 and the 2nd end part 1622 which are located in the both ends of a longitudinal direction. The first end portion 1621 is provided with an emission surface 1621A and a second reflection surface 1621B. The second end portion 1622 is provided with an incident surface 1622A and a first reflecting surface 1622B.

  Each of the entrance surface 1622A and the exit surface 1621A is a flat surface. The exit surface 1621A faces the light receiving unit 12 in a state where the light guide member 16 is attached to the substrate 18 (see FIG. 2B). Further, the incident surface 1622A faces the reflecting member 3 attached to the operation lever 42 of the crescent lock 40 in a state where the detection device 1 is attached to the window frame 100. The first reflecting surface 1622B is inclined obliquely outward from the second end portion 1622 toward the first end portion 1621. The first reflecting surface 1622B reflects the detection light LD1 incident from the incident surface 1622A toward the longitudinal direction of the second light guide unit 162. The second reflection surface 1621B includes two inclined surfaces having different inclination angles with respect to the emission surface 1621A, and reflects the detection light LD1 that has passed through the second light guide 162 toward the emission surface 1621A.

  The incident suppression unit 163 is configured such that the first light guide unit 161 and the second light guide unit 162 are arranged in a direction in which the first light guide unit 161 and the second light guide unit 162 are aligned (hereinafter also referred to as “array direction”). Located between. The incident suppression unit 163 intersects (orthogonally) a direction in which the first light guide unit 161 and the second light guide unit 162 are arranged (hereinafter also referred to as “orthogonal direction”), that is, the first light guide unit 161 and the first light guide unit 161. 2 It has the V-shaped groove | channel 1631 extended along the longitudinal direction of the light guide part 162. As shown in FIG. The incidence suppressing unit 163 is provided in the center portion in the longitudinal direction of the first light guide unit 161 and the second light guide unit 162. The incident suppression unit 163 suppresses the detection light LD1 that passes through the first light guide unit 161 from entering the second light guide unit 162, and the detection light LD1 that passes through the second light guide unit 162. Is prevented from entering the first light guide 161. For example, in a situation where the detection light LD1 that passes through the first light guide 161 is incident on the second light guide 161, the detection light LD1 that travels from the first light guide 161 toward the second light guide 162. Is reflected to the first light guide 161 side by the interface with the groove 1631. In addition, the detection light LD1 traveling from the second light guide 162 to the first light guide 161 is also reflected toward the second light guide 162 by the interface with the groove 1631.

  Each of the pair of attachment portions 164 and 165 is cylindrical. The attachment portion 164 is formed integrally with the first light guide portion 161 and has a screw hole 1641 into which a fixing screw SC1 for fixing to the substrate 18 is screwed. The attachment portion 165 is formed integrally with the second light guide portion 162, and has a screw hole 1651 into which the fixing screw SC1 is screwed.

  The first light guide unit 161 and the second light guide unit 162 are integrally formed by the incident suppression unit 163. Therefore, position adjustment between the 1st light guide part 161 and the 2nd light guide part 162 is unnecessary like the case where the 1st light guide part 161 and the 2nd light guide part 162 are provided separately. There is an advantage of being.

  As shown in FIGS. 2A and 2B, by screwing the two fixing screws SC1 respectively inserted into the two insertion holes provided in the substrate 18 into the screw holes 1641 and 1651 of the pair of attachment portions 164 and 165, The light guide member 16 is fixed to the substrate 18. In a state where the light guide member 16 is fixed to the substrate 18, the incident surface 1611 </ b> A of the first light guide unit 161 faces the light emitting unit 11, and the emission surface 1621 </ b> A of the second light guide unit 162 is connected to the light receiving unit 12. opposite.

  The housing 17 is formed in a rectangular box shape with a synthetic resin such as PBT (polybutylene terephthalate) resin. The housing 17 houses the light emitting unit 11 and the light receiving unit 12 mounted on the substrate 18. On the other hand, the light guide member 16 is exposed from the housing 17 as shown in FIGS. The detection light LD1 emitted from the light emitting unit 11 enters the incident surface 1611A of the first light guide unit 161 of the light guide member 16 through the first opening provided in the housing 17. In addition, the detection light LD1 emitted from the emission surface 1621A of the second light guide 162 enters the light receiver 12 through the second opening provided in the housing 17. The housing 17 houses a battery as an operating power source for the light emitting unit 11, the light receiving unit 12, the control unit 13, the determination unit 14, and the communication unit 15. The casing 17 is attached to the window frame 100 by an appropriate attachment method (double-sided tape, screws, etc.) (see FIG. 4A).

  The board | substrate 18 is a printed wiring board formed with the glass epoxy resin, for example. The light emitting unit 11 and the light receiving unit 12 described above are mounted on one surface of the substrate 18. Note that the control unit 13, the determination unit 14, and the communication unit 15 may be mounted on the substrate 18 or may be mounted on a substrate different from the substrate 18.

  By the way, the incident suppression part 163 is provided in the center part of the longitudinal direction of the 1st light guide part 161 and the 2nd light guide part 162 as mentioned above. Therefore, the detection light LD1 that passes through the first light guide unit 161 and the detection light LD1 that passes through the second light guide unit 162 are incident on the opposite light guide unit by the incident suppression unit 163. Can be suppressed. However, the incidence suppressing unit 163 cannot suppress the detection light LD1 from the light emitting unit 11 from directly entering the light receiving unit 12. In the detection apparatus 1 according to the present embodiment, a light shielding member 19 is provided for suppressing the detection light LD1 from the light emitting unit 11 from directly entering the light receiving unit 12. In other words, the detection apparatus 1 according to the present embodiment further includes a light shielding member 19 that shields the detection light LD1 from the light emitting unit 11 so as not to directly enter the light receiving unit 12.

  As shown in FIGS. 2A to 2C, the light shielding member 19 includes a first light shielding member 19A and a second light shielding member 19B. Each of the first light shielding member 19A and the second light shielding member 19B has a rectangular box shape. The first light shielding member 19 </ b> A is attached to the substrate 18 so as to cover the light emitting unit 11. The second light shielding member 19B is attached to the substrate 18 so as to cover the light receiving unit 12. A first hole 191 for limiting the emission range of the detection light LD1 from the light emitting unit 11 is provided on the surface of the first light shielding member 19A facing the light emitting unit 11. Further, a second hole 192 for limiting the incident range of the detection light LD1 to the light receiving unit 12 is provided on the surface of the second light shielding member 19B facing the light receiving unit 12.

  As described above, by providing the light shielding member 19 (particularly, the first light shielding member 19A), the emission range of the detection light LD1 from the light emitting unit 11 can be limited. As a result, it is possible to suppress the detection light LD1 from the light emitting unit 11 from directly entering the light receiving unit 12.

(2.4) Receiving Device The receiving device 2 is a communication interface for communicating with the communication unit 15 of the detection device 1. For example, the receiving device 2 performs wireless communication with the communication unit 15. That is, the receiving device 2 receives a radio signal including the discrimination information from the communication unit 15 of the detecting device 1.

(2.5) Reflective member The reflective member 3 has a thin rectangular plate shape as shown in FIGS. The reflection member 3 is attached to the operation lever 42 of the crescent lock 40 as shown in FIG. 4A. When the crescent lock 40 is in the locked state, the reflecting member 3 faces the emission surface 1612A of the first light guide 161 and the incident surface 1622A of the second light guide 162 (see FIG. 4A).

  The reflecting member 3 has recursiveness in this embodiment. Therefore, the reflection member 3 converts the detection light LD1 incident on the reflection member 3 from the first light guide 161 into the reflection member 3 when viewed from the direction in which the first light guide 161 and the second light guide 162 are aligned. It is reflected in the same direction as the incident direction. Further, the reflecting member 3 is configured so that the detection light LD1 incident from the first light guide 161 is the second light guide when viewed from the direction orthogonal to the direction in which the first light guide 161 and the second light guide 162 are arranged. The detection light LD 1 is reflected in a direction different from the direction of incidence on the reflecting member 3 so as to enter the portion 162. Here, the direction in which the detection light LD1 enters the reflection member 3 is the first direction, and the direction in which the detection light LD1 is reflected by the reflection member 3 is the second direction.

(3) Installation Example of Detection System Hereinafter, an installation example of the detection system 20 (the detection device 1 and the reflection member 3) according to the present embodiment will be described with reference to FIGS.

(3.1) Installation example 1
FIG. 4A is a schematic view of a state in which the detection system 20 according to the present embodiment is attached to a crescent lock 40 that is a first object.

  The detection apparatus 1 is attached to one window frame 100 of the sliding window. The reflecting member 3 is attached to the surface of the operation lever 42 of the crescent lock 40 that faces the window frame 100. When the crescent lock 40 is in the “locked state”, that is, when the hooking portion 421 of the operation lever 42 is hooked on the crescent receiver, the light exiting surface 1612 </ b> A of the first light guide portion 161 and the second light guide portion 162 of the light guide member 16. The incident surface 1622A and the reflecting member 3 face each other. Therefore, in this state, the detection light LD1 emitted from the emission surface 1612A of the first light guide unit 161 is reflected by the reflecting member 3, and enters the second light guide unit 162 from the incident surface 1622A of the second light guide unit 162. Is incident on.

  In the example of FIG. 4A, the distance D1 between the operation lever 42 of the crescent lock 40 and the window frame 100 is larger than the outer dimension (thickness dimension) D2 of the detection device 1. Therefore, in this case, not only the light guide member 16 but also the entire detection device 1 including the housing 17 can be disposed between the operation lever 42 and the window frame 100.

(3.2) Installation example 2
FIG. 4B is a schematic view of a state in which the detection system 20 according to the present embodiment is attached to the crescent lock 40A that is the second object.

  As shown in FIG. 4B, the crescent lock 40A includes a crescent main body 41, an operation lever 42A, and a crescent receiver. The total length L2 of the operation lever 42A is shorter than the total length L1 of the operation lever 42 described above (see FIG. 4A). Therefore, the reflecting member 3 is attached to one surface in the longitudinal direction of the operation lever 42A (the upper surface in FIG. 4B), not the surface facing the window frame 100 in the operation lever 42A. In this case, the inclination angle θ1 of the second reflection surface 1612B with respect to the emission surface 1612A of the first light guide 161 and the inclination angle θ1 of the first reflection surface 1622B with respect to the incidence surface 1622A of the second light guide 162 are small (shallow). To do. Accordingly, the detection light LD1 from the light emitting unit 11 can be guided to the reflection member 3 by the first light guide unit 161, and the detection light LD1 reflected by the reflection member 3 can be guided to the second light guide unit 162. Can be guided to the light receiving unit 12.

  In this way, even when the total length L2 of the operation lever 42A is short, it can be dealt with by adjusting the shape of the light guide member 16.

(3.3) Installation example 3
FIG. 4C is a schematic view of a state in which the detection system 20 according to the present embodiment is attached to the crescent lock 40B that is the third object.

  As shown in FIG. 4C, the crescent lock 40B includes a crescent body 41B, an operation lever 42, and a crescent receiver. In the example of FIG. 4C, the width of the crescent body 41B is small, and the distance D3 between the operation lever 42 attached to the crescent body 41B and the window frame 100 is narrow. In this case, as shown in FIG. 4C, this can be dealt with by arranging only the light guide member 16 between the operation lever 42 and the window frame 100.

  In the detection apparatus 1 and the detection system 20 according to the present embodiment, by providing the light guide member 16, it is possible to install regardless of the shape or the like of the crescent locks 40, 40A, and 40B. That is, compared with the case where the light guide member 16 is not provided, the degree of freedom of arrangement of the detection device 1 can be improved.

(4) Operation (4.1) Light emitting operation and light receiving operation First, the light emitting operation of the light emitting unit 11 and the light receiving operation of the light receiving unit 12 will be described with reference to FIGS.

  In the first period T1, the light emitting unit 11 emits the detection light LD1 according to the first control signal from the control unit 13. The detection light LD1 from the light emitting unit 11 passes through the first hole 191 of the first light shielding member 19A and the first opening of the housing 17, and enters the first light guide unit 161 from the incident surface 1611A. The detection light LD1 incident on the first light guide 161 is reflected by the first reflecting surface 1611B and passes through the first light guide 161 along the longitudinal direction of the first light guide 161. The detection light LD1 that has passed through the first light guide 161 is reflected by the second reflecting surface 1612B and emitted from the emitting surface 1612A toward the reflecting member 3 (see FIG. 2A).

  The detection light LD1 incident on the reflecting member 3 is reflected by the reflecting member 3 toward the second light guide unit 162. Here, the reflection member 3 has recursion as described above. Therefore, the detection light LD1 reflected by the reflection member 3 is the same as the incident direction of the detection light LD1 to the reflection member 3 when viewed from the direction in which the first light guide unit 161 and the second light guide unit 162 are aligned. Reflects in the direction (see FIGS. 2A and 2B). On the other hand, the detection light LD1 reflected by the reflecting member 3 is detected on the reflecting member 3 so as to be incident on the second light guide 162 when viewed from a direction (orthogonal direction) orthogonal to the arrangement direction. The light is reflected in a direction different from the incident direction of the light LD1. (See FIG. 2C).

  The detection light LD1 incident from the incident surface 1622A of the second light guide 162 is reflected by the first reflective surface 1622B and passes through the second light guide 162 along the longitudinal direction of the second light guide 162. . The detection light LD1 that has passed through the second light guide 162 is reflected by the second reflecting surface 1621B and emitted from the emitting surface 1621A. The detection light LD1 emitted from the emission surface 1621A enters the light receiving unit 12 through the second opening of the housing 17 and the second hole 192 of the second light shielding member 19B. The light receiving unit 12 performs a light receiving operation through the first period T1 and the second period T2, and generates a first voltage signal corresponding to the light receiving level of the incident detection light LD1.

(4.2) Determination Operation Next, the determination operation of the determination unit 14 will be described with reference to FIG. The horizontal axis in FIG. 5 is the time axis. “C1” in FIG. 5 is the luminous intensity of the detection light LD1 emitted by the light emitting unit 11. “V1” in FIG. 5 is a difference signal between the second voltage signal in the first period T1 and the second voltage signal in the second period T2. “S1” in FIG. 5 is a detection signal output from the determination unit 14.

  The light emitting unit 11 performs a first period T1 (for example, 1 millisecond) in which the light emitting operation is performed and a second period T2 in which the light emitting operation is not performed in accordance with the first control signal from the control unit 13 in a certain period T0 (for example, 1 second). (For example, 5 milliseconds) are repeated alternately. In the example of FIG. 5, the light emitting unit 11 emits the detection light LD1 having the luminous intensity C11 in the first period T1. In the present embodiment, the first period T1 is shorter than the second period T2.

  The light receiving unit 12 performs a light receiving operation through the first period T1 and the second period T2 in the fixed period T0. That is, in the present embodiment, the light receiving unit 12 continuously performs a light receiving operation. The light receiving unit 12 creates a first voltage signal corresponding to the received light level from the received light level of the light received in each of the first period T1 and the second period T2, and outputs the first voltage signal to the AMP circuit. The AMP circuit creates a second voltage signal obtained by removing the DC component from the first voltage signal from the light receiving unit 12, and outputs the second voltage signal to the control unit 13. The control unit 13 outputs the second voltage signal from the AMP circuit to the determination unit 14.

  The determination unit 14 determines the state of the crescent lock 40 based on the second voltage signal from the control unit 13. At this time, the determination unit 14 creates a difference signal V1 between the second voltage signal in the first period T1 and the second voltage signal in the second period T2, and determines the state of the crescent lock 40 based on the difference signal V1. To do. In other words, the determination unit 14 is based on the difference between the first light receiving level of light received by the light receiving unit 12 in the first period T1 and the second light receiving level of light received by the light receiving unit 12 in the second period T2. The state of the object 4 (the crescent lock 40) is determined.

  In the example of FIG. 5, the determination unit 14 compares the three difference signals V1 with a preset threshold voltage Vth in a certain period T0. The determination unit 14 determines that the crescent lock 40 is in the “locked state” because the magnitudes V11 of the three difference signals V1 all exceed the threshold voltage Vth. In other words, the determination unit 14 determines that the crescent lock 40 is in the “locked state” because the light receiving level of the detection light LD1 received by the light receiving unit 12 exceeds the threshold value three times. Further, the determination unit 14 outputs a detection signal S1 for notifying the control unit 13 that the crescent lock 40 is in the “locked state” for a certain time (for example, 500 milliseconds). At this time, for example, a user (for example, a resident) may be notified that the crescent lock 40 is in the “locked state” by lighting a display LED for a certain period of time.

  In the present embodiment, as described above, the determination unit 14 determines the target based on the number of times (three times in the present embodiment) that the light receiving level of the detection light LD1 received by the light receiving unit 12 in the certain period T0 exceeds the threshold value. The state of the object 4 (the crescent lock 40) is determined. Therefore, erroneous detection can be reduced compared to the case where the state of the object 4 is determined when the light receiving level of the detection light LD1 received by the light receiving unit 12 exceeds the threshold even once.

  In the present embodiment, the determination unit 14 determines the state of the crescent lock 40 based on the difference signal V1 between the second voltage signal in the first period T1 and the second voltage signal in the second period T2. . Therefore, compared with the case where the state of the crescent lock 40 is determined based only on the second voltage signal in the first period T1, the influence of sunlight or the like can be reduced, and as a result, false detection can be reduced. Can do.

(5) Modification Example 1 is only one of various embodiments of the present disclosure. The first embodiment can be variously modified according to the design or the like as long as the object of the present disclosure can be achieved. Moreover, the function similar to the detection apparatus 1 may be embodied by the control method of the detection apparatus 1, a computer program, a non-temporary recording medium which recorded the computer program, etc.

  The control method of the detection apparatus 1 according to one aspect is a control method of the detection apparatus 1 including the light emitting unit 11, the light receiving unit 12, the control unit 13, and the determination unit 14. The light emitting unit 11 emits the detection light LD1. The light receiving unit 12 receives the detection light LD1 from the light emitting unit 11. The control unit 13 controls at least the light emitting unit 11 so that the first period T1 and the second period T2 are alternately repeated. The determination unit 14 determines the state of the object 4 based on the light reception level of the detection light LD1 received by the light receiving unit 12. The first period T1 is a period in which both the light emitting operation in which the light emitting unit 11 emits the detection light LD1 and the light receiving operation in which the light receiving unit 12 receives the detection light LD1 are performed. The second period T2 is a period during which at least one of the light emitting operation and the light receiving operation is not performed.

  The program which concerns on 1 aspect is a program for making a computer system perform the control method of the above-mentioned detection apparatus 1. FIG.

  Hereinafter, modifications of the first embodiment will be listed. The modifications described below can be applied in appropriate combinations.

  The execution subject of the detection apparatus 1, the detection system 20, and the communication system 10 in the present disclosure includes a computer system. The computer system has a processor and memory as hardware. When the processor executes the program recorded in the memory of the computer system, a function as an execution subject of the detection device 1, the detection system 20, and the communication system 10 according to the present disclosure is realized. The program may be recorded in advance in the memory of the computer system, but may be provided through a telecommunication line. The program may be provided by being recorded on a non-transitory recording medium such as a memory card, an optical disk, or a hard disk drive that can be read by a computer system. A processor of a computer system includes one or more electronic circuits including a semiconductor integrated circuit (IC) or a large scale integrated circuit (LSI). Here, it is called IC or LSI, but the name changes depending on the degree of integration, and may be called system LSI, VLSI (very large scale integration), or ULSI (ultra large scale integration). Field programmable gate arrays (FPGAs) programmed after manufacturing LSIs, or reconfigurable logic devices that can reconfigure junctions within LSIs or set up circuit partitions inside LSIs, should be used for the same purpose Can do. The plurality of electronic circuits may be integrated on one chip, or may be distributed on the plurality of chips. The plurality of chips may be integrated into one device, or may be distributed and provided in a plurality of devices.

(5.1) Modification 1
In the first embodiment, the light guide member 16 is attached to the substrate 18, but as shown in FIGS. 6A and 6B, the light guide member 16A may be detachably attached to the housing 17A. Hereinafter, a detection apparatus 1A according to Modification 1 will be described with reference to FIGS. 6A and 6B. The configuration other than the light guide member 16A and the housing 17A is the same as that of the detection device 1 of the first embodiment, and the same components are denoted by the same reference numerals and description thereof is omitted.

  A detection apparatus 1A according to the first modification includes a light emitting unit 11, a light receiving unit 12, a control unit 13, a determination unit 14, and a communication unit 15. The detection device 1A includes a light guide member 16A, a housing 17A, and a substrate 18.

  As shown in FIGS. 6A and 6B, the housing 17A has a hollow rectangular parallelepiped shape that is long in one direction (the vertical direction in FIG. 6B). An opening 171A is provided at one end of the casing 17A in the longitudinal direction (end on the light guide member 16A side). A substrate 18 on which the light emitting unit 11 and the light receiving unit 12 are mounted is housed inside the housing 17A.

  The light guide member 16A is formed of a light-transmitting material such as an acrylic resin. As illustrated in FIG. 6B, the light guide member 16A includes a first light guide unit 161A, a second light guide unit 162A, and an incident suppression unit 163A. In the light guide member 16A, as in the light guide member 16, the first light guide unit 161A and the second light guide unit 162A are integrated by the incident suppression unit 163A.

  161 A of 1st light guide parts are rod-shaped long in one direction (up-down direction in FIG. 6B). 161 A of 1st light guides have the 1st main-body part 1610A and the 1st front-end | tip part 1610B. The first main body portion 1610A and the first tip portion 1610B are arranged in one direction. The cross-sectional shape of each of the first main body portion 1610A and the first tip portion 1610B in one direction is a rectangular shape, and the outer dimension of the first tip portion 1610B is larger than the outer dimension of the first main body portion 1610A.

  Similarly to the first light guide 161A, the second light guide 162A has a rod shape that is long in one direction (vertical direction in FIG. 6B). 162 A of 2nd light guide parts have the 2nd main-body part 1620A and the 2nd front-end | tip part 1620B. Second body portion 1620A and second tip portion 1620B are arranged in one direction. Each of the second main body portion 1620B and the second front end portion 1620B has a rectangular cross-sectional shape in one direction, and the external dimensions of the second front end portion 1620B are larger than the external dimensions of the second main body portion 1620A.

  Here, in the detection apparatus 1A according to the first modification, the first main body portion 1610A of the first light guide portion 161A and the second main body portion 1620A of the second light guide portion 162A are inserted into the opening portion 171A of the housing 17A. Thus, the light guide member 16A can be detachably attached to the housing 17A. In other words, the outer dimensions of the insertion portion constituted by the first main body portion 1610A and the second main body portion 1620A are substantially the same as the opening size of the opening portion 171A of the housing 17A. When the light guide member 16A is attached to the housing 17A, the first tip portion 1610B of the first light guide portion 161A and the second tip portion 1620B of the second light guide portion 162A are exposed (see FIG. 6A). ).

  In the detection apparatus 1A according to the first modification, the light guide member 16A can be mounted by simply inserting the light guide member 16A insertion portion (the first main body portion 1610A and the second main body portion 1620A) into the opening 171A of the housing 17A. It can be attached to 17A, and there is an advantage that workability is improved. In addition, there is an advantage that it is possible to cope with a plurality of types of objects by simply replacing the light guide members with different shapes.

(5.2) Modification 2
A detection apparatus 1B according to Modification 2 will be described with reference to FIGS. 7A and 7B. In addition, about structures other than the light guide member 16B and the housing | casing 17B, it is the same as that of the detection apparatus 1 of Embodiment 1, the same code | symbol is attached | subjected to the same component and description is abbreviate | omitted.

  The detection device 1B according to the modification 2 includes a light emitting unit 11, a light receiving unit 12, a control unit 13, a determination unit 14, and a communication unit 15. The detection device 1B includes a light guide member 16B, a housing 17B, and a substrate 18.

  As shown in FIGS. 7A and 7B, the housing 17B has a hollow rectangular parallelepiped shape that is long in one direction (the vertical direction in FIG. 7B). An opening 171B is provided at one end of the casing 17B in the longitudinal direction (end on the light guide member 16B side). A substrate 18 on which the light emitting unit 11 and the light receiving unit 12 are mounted is housed in the housing 17B.

  The light guide member 16B includes a first light guide portion 161B, a second light guide portion 162B, and an insertion portion 166. The first light guide 161B and the second light guide 162B are arranged in the short direction of the housing 17B. The insertion part 166 is integrally formed at the end of the first light guide part 161B and the second light guide part 162B on the housing 17B side. The external dimension of the insertion part 166 is substantially the same as the opening dimension of the opening part 171B of the housing 17B.

  In a state where the insertion portion 166 of the light guide member 16B is inserted into the opening 171B of the housing 17B and the light guide member 16B is attached to the housing 17B, the light emitting portion 11 and the light receiving portion 12 face the end surface of the insertion portion 166. is doing. That is, the end surface of the insertion part 166 is an incident surface on which the detection light LD1 from the light emitting unit 11 is incident, and an emission surface from which the detection light LD1 to the light receiving unit 12 is emitted.

  In the detection apparatus 1B according to Modification 2, the light guide member 16B can be attached to the housing 17B simply by inserting the insertion portion 166 of the light guide member 16B into the opening 171B of the housing 17B, and workability is improved. There is an advantage. In addition, there is an advantage that it is possible to cope with a plurality of types of objects by simply replacing the light guide members with different shapes.

(5.3) Modification 3
A detection apparatus 1C according to Modification 3 will be described with reference to FIG. 8A. The configuration other than the light guide member 16C and the housing 17C is the same as that of the detection device 1 of the first embodiment, and the same components are denoted by the same reference numerals and description thereof is omitted.

  A detection device 1 </ b> C according to Modification 3 includes a light emitting unit 11, a light receiving unit 12, a control unit 13, a determination unit 14, and a communication unit 15. The detection device 1 </ b> C includes a light guide member 16 </ b> C, a housing 17 </ b> C, and a substrate 18.

  As shown in FIG. 8A, the housing 17C has a hollow rectangular parallelepiped shape that is long in one direction (the vertical direction in FIG. 8A). An opening is provided at one end of the casing 17C in the longitudinal direction (end on the light guide member 16C side). A substrate 18 on which the light emitting unit 11 and the light receiving unit 12 are mounted is housed inside the housing 17C.

  The shape of the light guide member 16C viewed from the thickness direction is rectangular. The light guide member 16C is detachably attached to the housing 17C by inserting a part thereof into the opening of the housing 17C. In a state where the light guide member 16C is attached to the housing 17C, the light emitting unit 11 and the light receiving unit 12 face the end surface of the insertion portion of the light guide member 16C into the housing 17C. That is, the end surface of the insertion portion of the light guide member 16C into the housing 17C is an incident surface on which the detection light LD1 from the light emitting unit 11 is incident, and the emission from which the detection light LD1 is emitted to the light receiving unit 12 is emitted. Surface.

  In the detection apparatus 1C according to Modification 3, as shown in FIG. 8A, the thickness of the casing 17C is thicker than the thickness of the light guide member 16C.

(5.4) Modification 4
A detection apparatus 1D according to Modification 4 will be described with reference to FIG. 8B. In addition, about structures other than light guide member 16D and housing | casing 17D, it is the same as that of the detection apparatus 1 of Embodiment 1, The same code | symbol is attached | subjected to the same component and description is abbreviate | omitted.

  A detection device 1D according to Modification 4 includes a light emitting unit 11, a light receiving unit 12, a control unit 13, a determination unit 14, and a communication unit 15. The detection device 1D includes a light guide member 16D, a housing 17D, and a substrate 18.

  As shown in FIG. 8B, the housing 17D has a hollow rectangular parallelepiped shape that is long in one direction (the vertical direction in FIG. 8B). An opening is provided at one end of the casing 17D in the longitudinal direction (end on the light guide member 16D side). A substrate 18 on which the light emitting unit 11 and the light receiving unit 12 are mounted is accommodated in the housing 17D.

  The light guide member 16D has a rectangular shape when viewed from the thickness direction. The light guide member 16D is detachably attached to the housing 17D by inserting a part of the light guide member 16D into the opening of the housing 17D. In a state in which the light guide member 16D is attached to the housing 17D, the light emitting unit 11 and the light receiving unit 12 face the end surface of the insertion portion of the light guide member 16D into the housing 17D. That is, the end surface of the insertion portion of the light guide member 16D into the housing 17D is an incident surface on which the detection light LD1 from the light emitting unit 11 is incident, and the output from which the detection light LD1 is output to the light receiving unit 12 is emitted. Surface.

  In the detection apparatus 1D according to the modification 4, as illustrated in FIG. 8B, the thickness of the light guide member 16D and the thickness of the housing 17D are the same.

(5.5) Modification 5
A detection apparatus 1E according to Modification 5 will be described with reference to FIG. 8C. In addition, about structures other than the light guide member 16E and the housing | casing 17E, it is the same as that of the detection apparatus 1 of Embodiment 1, the same code | symbol is attached | subjected to the same component and description is abbreviate | omitted.

  A detection device 1E according to Modification 5 includes a light emitting unit 11, a light receiving unit 12, a control unit 13, a determination unit 14, and a communication unit 15. The detection device 1E includes a light guide member 16E, a housing 17E, and a substrate 18.

  As shown in FIG. 8C, the housing 17E has a hollow rectangular parallelepiped shape that is long in one direction (the vertical direction in FIG. 8C). An opening is provided at one end of the casing 17E in the longitudinal direction (end on the light guide member 16E side). The other end of the casing 17E in the longitudinal direction (the end opposite to the light guide member 16E) is rounded. A substrate 18 on which the light emitting unit 11 and the light receiving unit 12 are mounted is accommodated in the housing 17E.

  The light guide member 16E has a plate shape with the same thickness as the housing 17E. R chamfering is applied to one end of the light guide member 16E (the end opposite to the housing 17E). The light guide member 16E is detachably attached to the housing 17E by inserting a part of the other end side of the light guide member 16E into the opening of the housing 17E. In a state in which the light guide member 16E is attached to the housing 17E, the light emitting unit 11 and the light receiving unit 12 face the end surface of the insertion portion of the light guide member 16E into the housing 17E. That is, the end surface of the insertion portion of the light guide member 16E into the housing 17E is an incident surface on which the detection light LD1 from the light emitting unit 11 is incident, and the emission from which the detection light LD1 is emitted to the light receiving unit 12 is emitted. Surface.

(5.6) Modification 6
A detection apparatus 1F according to Modification 6 will be described with reference to FIG. 8D. In addition, about structures other than the light guide member 16F, the housing | casing 17F, and the flame | frame 21, it is the same as that of the detection apparatus 1 of Embodiment 1, The same code | symbol is attached | subjected to the same component and description is abbreviate | omitted.

  A detection device 1F according to Modification 6 includes a light emitting unit 11, a light receiving unit 12, a control unit 13, a determination unit 14, and a communication unit 15. The detection device 1F includes a light guide member 16F, a housing 17F, a substrate 18, and a frame 21.

  As shown in FIG. 8D, the housing 17F has a hollow rectangular parallelepiped shape that is long in one direction (the vertical direction in FIG. 8D). An opening is provided at one end of the casing 17F in the longitudinal direction (end on the light guide member 16F side). A substrate 18 on which the light emitting unit 11 and the light receiving unit 12 are mounted is accommodated in the housing 17F.

  The shape of the light guide member 16F viewed from the thickness direction is rectangular. The light guide member 16F is detachably attached to the housing 17F by inserting a part thereof into the opening of the housing 17F. In a state where the light guide member 16F is attached to the housing 17F, the light emitting unit 11 and the light receiving unit 12 face the end surface of the insertion portion of the light guide member 16F into the housing 17F. That is, the end surface of the insertion portion of the light guide member 16F into the housing 17F is an incident surface on which the detection light LD1 from the light emitting unit 11 is incident, and the emission from which the detection light LD1 is emitted to the light receiving unit 12 is emitted. Surface.

  The frame 21 is formed of a light-shielding material, like the housing 17F. The frame 21 is attached to the housing 17F so as to expose only the main surface 167 of the light guide member 16F corresponding to the exit surface of the first light guide and the entrance surface of the second light guide. Thereby, compared with the case where there is no frame 21, the influence by external light, such as sunlight, can be reduced.

(5.7) Other Modified Examples Other modified examples are listed below.

  In Embodiment 1, although the case where the detection system was a reflection type was illustrated, the detection system is not limited to the reflection type but may be a transmission type. In this case, for example, a light emitting unit that emits detection light is attached to one window frame of the sliding window, and a light receiving unit that receives the detection light is attached to the crescent lock. The discriminating unit discriminates that the crescent lock is in the “locked state” when the light receiving unit receives the detection light from the light emitting unit, and the crescent lock is in the “unlocked state” when the light receiving unit is not receiving light. ". In this case, there is an advantage that a reflecting member for reflecting the detection light from the light emitting unit is unnecessary.

  In the first embodiment, the case where the detection light LD1 from the light emitting unit 11 is infrared is illustrated, but the detection light LD1 is not limited to infrared, and may be visible light. In addition, the light emitting unit 11 may include a light emitting element other than the light emitting diode as long as the light emitting unit 11 emits the detection light LD1.

  In the first embodiment, the case where only the light emitting operation of the light emitting unit 11 is not performed in the second period T2 is exemplified. However, at least one of the light emitting operation and the light receiving operation is not performed in the second period T2. That's fine. That is, in the second period T2, both the light emitting operation and the light receiving operation may not be performed, or only the light receiving operation may not be performed. Furthermore, the control unit 13 or the determination unit 14 may be configured to ignore the second voltage signal input from the AMP circuit in the second period T2.

  In the first embodiment, the light shielding member 19 includes both the first light shielding member 19A and the second light shielding member 19B. The light shielding member 19 includes at least one of the first light shielding member 19A and the second light shielding member 19B. It only has to be included. That is, the light shielding member 19 may include only the first light shielding member 19A, or may include only the second light shielding member 19B.

  In the first embodiment, the second period T2 is constant, but the length of the second period T2 may be random. That is, the control unit 13 may be configured to randomly change the length of the second period T2. According to this configuration, it is possible to reduce erroneous detection of the state of the object 4 as compared with the case where the length of the second period T2 is constant.

  In the first embodiment, the case where the first period T1 is shorter than the second period T2 is illustrated, but the first period T1 may be the same length as the second period T2, or may be longer than the second period T2. It may be long.

  In the first embodiment, the determination unit 14 determines the state of the object 4 based on the number of times that the light receiving level of the detection light LD1 received by the light receiving unit 12 in a certain period T0 exceeds a threshold value. On the other hand, the determination unit 14 may determine the state of the object 4 based on the ratio at which the light receiving level of the detection light LD1 received by the light receiving unit 12 in the certain period T0 exceeds the threshold value. As an example, a case is assumed in which the light emitting unit 11 emits the detection light LD1 five times in a certain period T0. In this case, for example, the determination unit 14 may determine that the crescent lock 40 is in the “locked state” if the light receiving level of the detection light LD1 received by the light receiving unit 12 exceeds the threshold value three times or more. . According to this configuration, the state of the object 4 is more erroneous than when the state of the object 4 is determined when the light receiving level of the detection light LD1 received by the light receiving unit 12 exceeds the threshold even once. Detection can be reduced.

  In the first embodiment, the case where the light reception level of the detection light LD1 exceeds the threshold value three times in succession is exemplified, but the light reception level of the detection light LD1 is a predetermined number of times (three times in this embodiment) in a certain period T0. ) As long as the threshold is exceeded, it does not have to be continuous. In addition, the number of times the light emitting unit 11 emits the detection light LD1 in the predetermined period T0 is also an example, and may be two times or four times or more.

  In Embodiment 1, although the case where a target object was a crescent lock was illustrated, a target object may be not only a crescent lock but an entrance door, such as a detached house, for example.

  In the first embodiment, the case where the incident suppression unit 163 includes the groove 1631 is illustrated. However, the incident suppression unit 163 may be configured to be able to suppress the incidence from one light guide unit to the other light guide unit. The groove structure is not limited.

  In the first embodiment, the threshold value (threshold voltage Vth) with respect to the light reception level of the detection light LD1 is constant. However, this threshold value may be changeable according to the installation environment of the detection device 1 or the like, for example.

  In the first embodiment, the case where the communication between the detection device 1 (the communication unit 15) and the reception device 2 is wireless communication is illustrated, but the communication between the detection device 1 (the communication unit 15) and the reception device 2 is wireless. Not only communication but wired communication may be used.

  In the first embodiment, the case where the operation power sources of the light emitting unit 11, the light receiving unit 12, the control unit 13, the determination unit 14, and the communication unit 15 are batteries is illustrated. On the other hand, the operation power sources of the light emitting unit 11, the light receiving unit 12, the control unit 13, the determination unit 14, and the communication unit 15 are not limited to batteries, and for example, power may be supplied from the outside via electric wires.

  In Modifications 1 to 6, the entire light guide members 16A to 16F can be attached to and detached from the housings 17A to 17F, but at least a part of the light guide members 16A to 16F is attached to and detached from the housings 17A to 17F. If possible. In other words, it is sufficient that at least a part of the light guide members 16A to 16F is detachable from the housings 17A to 17F.

(Embodiment 2)
In the first embodiment, the case where the light guide member 16 is exposed from the housing 17 is illustrated. However, as illustrated in FIG. 9, the light guide member 16 may be housed in the housing 17G. In other words, the detection apparatus 1G may include a housing 17G that houses the light emitting unit 11, the light receiving unit 12, and the light guide member 16. Hereinafter, the detection apparatus 1G according to the second embodiment will be described with reference to FIG. The configuration other than the housing 17G, the light transmission unit 22, and the adjustment unit 23 is the same as that of the detection device 1 of the first embodiment, and the same components are denoted by the same reference numerals and description thereof is omitted.

  The detection device 1G according to the present embodiment includes a light emitting unit 11, a light receiving unit 12, a control unit 13, a determination unit 14, and a communication unit 15. The detection device 1G includes a light guide member 16, a housing 17G, a substrate 18, a light transmission unit 22, and an adjustment unit 23.

  The housing 17G is formed in a rectangular box shape with a synthetic resin such as PBT resin, for example. The housing 17G has an opening 172. The opening 172 is formed so as to straddle the two side surfaces of the housing 17G, and the shape of the side view is L-shaped. Specifically, the opening 172 corresponds to the second end 1612 of the first light guide 161 of the light guide member 16 housed in the housing 17G and the second end 1622 of the second light guide 162. It is formed in the position to do.

  The light transmission portion 22 is formed of a light-transmitting material such as an acrylic resin, for example, and has a L shape when viewed from the side. The light transmission part 22 is attached to the housing 17G so as to cover the opening 172.

  In this configuration, the detection light LD1 emitted from the emission surface 1612A of the first light guide unit 161 is transmitted through the light transmission unit 22 and enters the reflection member 3. Further, the detection light LD1 reflected by the reflecting member 3 is transmitted through the light transmission unit 22 and enters the second light guide unit 162 from the incident surface 1622A of the second light guide unit 162. In other words, the housing 17 </ b> G includes the light transmission unit 22 that transmits the detection light LD <b> 1 emitted from the first light guide unit 161 and transmits the detection light LD <b> 1 incident on the second light guide unit 162.

  The adjusting unit 23 is formed of a synthetic resin having low light transmittance such as PBT resin. The light transmission range of the light transmission unit 22 can be adjusted by covering the light transmission unit 22 with the adjustment unit 23.

  In the detection apparatus 1G according to the present embodiment, the light guide member 16 is also housed in the housing 17G, and the detection light LD1 from the first light guide portion 161 is guided to the reflection member 3, and the reflection member 3 can be guided to the second light guide 162.

(Summary)
As described above, the detection device (1; 1A to 1G) according to the first aspect includes the light emitting unit (11), the light receiving unit (12), the control unit (13), and the determination unit (14). . The light emitting unit (11) emits detection light (LD1). The light receiving unit (12) receives the detection light (LD1) from the light emitting unit (11). The control unit (13) controls at least the light emitting unit (11) so that the first period (T1) and the second period (T2) are alternately repeated. The determination unit (14) determines the state of the object (4; 4A; 4B) based on the light reception level of the detection light (LD1) received by the light reception unit (12). The first period (T1) is a period in which both the light emitting operation in which the light emitting unit (11) emits the detection light (LD1) and the light receiving operation in which the light receiving unit (12) receives the detection light (LD1) are performed. It is. The second period (T2) is a period during which at least one of the light emitting operation and the light receiving operation is not performed.

  According to this aspect, since the second period (T2) during which at least one of the light emitting operation and the light receiving operation is not performed is provided, the power consumption is reduced compared to the case where the light emitting operation and the light receiving operation are always performed. be able to.

  In the detection device (1; 1A to 1G) according to the second aspect, in the first aspect, the first period (T1) is shorter than the second period (T2).

  According to this aspect, it is possible to reduce power consumption as compared with the case where the first period (T1) and the second period (T2) have the same length.

  In the detection device (1; 1A to 1G) according to the third aspect, in the first or second aspect, the control unit (13) randomly changes the length of the second period (T2).

  According to this aspect, it is possible to reduce false detection of the state of the object (4; 4A; 4B) as compared with the case where the length of the second period (T2) is constant.

  In the detection device (1; 1A to 1G) according to the fourth aspect, in any one of the first to third aspects, the determination unit (14) is based on a ratio at which the light reception level exceeds a threshold value during a certain period (T0). Then, the state of the object (4; 4A; 4B) is determined.

  According to this aspect, erroneous detection of the state of the object (4; 4A; 4B) can be reduced.

  In the detection device (1; 1A to 1G) according to the fifth aspect, in any one of the first to third aspects, the determination unit (14) is based on the number of times that the light reception level exceeds the threshold value in a certain period (T0). Then, the state of the object (4; 4A; 4B) is determined.

  According to this aspect, erroneous detection of the state of the object (4; 4A; 4B) can be reduced.

  In the detection device (1; 1A to 1G) according to the sixth aspect, in any one of the first to fifth aspects, the light reception level is a difference between the first light reception level and the second light reception level. The first light receiving level is a light receiving level of light (including the detection light LD1) received by the light receiving unit (12) in the first period (T1). The second light receiving level is a light receiving level of light received by the light receiving unit (12) in the second period (T2).

  According to this aspect, it is possible to reduce false detection as compared with the case of determining the state of the object (4; 4A; 4B) based only on the first light reception level.

  The detection device (1; 1A to 1G) according to the seventh aspect further includes a communication unit (15) that transmits information on the determination result of the determination unit (14) in any one of the first to sixth aspects.

  According to this aspect, the discrimination result of the discrimination unit (14) can be transmitted to the external device (for example, the receiving device 2).

  The detection system (20) according to the eighth aspect includes the detection device (1; 1A to 1G) according to any one of the first to seventh aspects, and a reflecting member (3). The reflecting member (3) reflects the detection light (LD1) from the light emitting unit (11) to the light receiving unit (12).

  According to this aspect, the detection light (LD1) from the light emitting unit (11) can be reflected to the light receiving unit (12) via the reflecting member (3).

  The communication system (10) which concerns on a 9th aspect is provided with the detection apparatus (1; 1A-1G) which concerns on a 7th aspect, and a receiver (2). The receiving device (2) receives the information from the communication unit (15).

  According to this aspect, the determination result of the determination unit (14) can be received by the receiving device (2).

  The control method of the detection apparatus (1; 1A to 1G) according to the tenth aspect includes a light emitting unit (11), a light receiving unit (12), a control unit (13), and a determination unit (14). It is a control method of a detection apparatus (1; 1A-1G). The light emitting unit (11) emits detection light (LD1). The light receiving unit (12) receives the detection light (LD1) from the light emitting unit (11). The control unit (13) controls at least the light emitting unit (11) so that the first period (T1) and the second period (T2) are alternately repeated. The determination unit (14) determines the state of the object (4; 4A; 4B) based on the light reception level of the detection light (LD1) received by the light reception unit (12). The first period (T1) is a period in which both the light emitting operation in which the light emitting unit (11) emits the detection light (LD1) and the light receiving operation in which the light receiving unit (12) receives the detection light (LD1) are performed. It is. The second period (T2) is a period during which at least one of the light emitting operation and the light receiving operation is not performed.

  According to this aspect, since the second period (T2) during which at least one of the light emitting operation and the light receiving operation is not performed is provided, the power consumption is reduced compared to the case where the light emitting operation and the light receiving operation are always performed. be able to.

  The program according to the eleventh aspect is a program for causing a computer system to execute the control method of the detection device (1; 1A to 1G) according to the tenth aspect.

  According to this aspect, since the second period (T2) during which at least one of the light emitting operation and the light receiving operation is not performed is provided, the power consumption is reduced compared to the case where the light emitting operation and the light receiving operation are always performed. be able to.

  About the structure which concerns on the 2nd-7th aspect, it is not an essential structure of a detection apparatus (1; 1A-1G), and can be abbreviate | omitted suitably.

1, 1A to 1G Detector 11 Light emitter 12 Light receiver 13 Controller 14 Discriminator 15 Communication unit 2 Receiver 3 Reflective member 4, 4A, 4B Object 10 Communication system 20 Detection system LD1 Detection light T0 Fixed period T1 First 1 period T2 2nd period

Claims (11)

A light emitting section for emitting detection light;
A light receiving unit that receives the detection light from the light emitting unit;
A control unit that controls at least the light emitting unit such that the first period and the second period are alternately repeated;
A discriminating unit for discriminating a state of an object based on a light receiving level of the detection light received by the light receiving unit,
The first period is a period in which both a light emitting operation in which the light emitting unit emits the detection light and a light receiving operation in which the light receiving unit receives the detection light are performed.
The second period is a period in which at least one of the light emitting operation and the light receiving operation is not performed.
Detection device. The first period is shorter than the second period;
The detection device according to claim 1. The control unit randomly changes the length of the second period.
The detection device according to claim 1 or 2. The determination unit determines the state of the object based on a ratio of the light reception level exceeding a threshold value in a certain period;
The detection apparatus of any one of Claims 1-3. The determination unit determines the state of the object based on the number of times the light reception level exceeds a threshold value in a certain period.
The detection apparatus of any one of Claims 1-3. The light receiving level is a difference between a first light receiving level of light received by the light receiving unit in the first period and a second light receiving level of light received by the light receiving unit in the second period.
The detection apparatus of any one of Claims 1-5. A communication unit that transmits information on the determination result of the determination unit;
The detection device according to any one of claims 1 to 6. The detection device according to any one of claims 1 to 7,
A reflection member that reflects the detection light from the light emitting unit to the light receiving unit,
Detection system. A detection device according to claim 7;
A receiving device that receives the information from the communication unit,
Communications system. A light emitting section for emitting detection light;
A light receiving unit that receives the detection light from the light emitting unit;
A control unit that controls at least the light emitting unit such that the first period and the second period are alternately repeated;
A determination unit that determines a state of an object based on a light reception level of the detection light received by the light receiving unit,
The first period is a period in which both a light emitting operation in which the light emitting unit emits the detection light and a light receiving operation in which the light receiving unit receives the detection light are performed.
The second period is a period in which at least one of the light emitting operation and the light receiving operation is not performed.
Control method of the detection device. Computer system,
The program for performing the control method of the detection apparatus of Claim 10.

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