JP4591620B2 - Detector - Google Patents

Description

  The present invention relates to a detection device.

  Conventionally, as a means of detecting intruders from outside the house, there is a method in which infrared transmitters and receivers are installed at a fixed distance, the area between the transmitter and receiver is alerted, and intruders between them are detected. It is widely known (see, for example, Patent Document 1). That is, the intruder is detected when the infrared ray transmitted from the transmitter is blocked by the intruder and cannot be received by the receiver.

JP-A-2-27072

  However, when the transmitter and the receiver are in a one-to-one one-beam system as in the above-described conventional example, malfunctions due to entry of small animals or the like frequently occur.

  In order to solve this problem, a two-beam system as shown in FIG. 6 in which the transmitter 1 and the receiver 2 are two-to-two is also provided. The fence 3a as the building exterior 3 is supported by a support column 4 standing at a predetermined interval, and a detection unit 5 is provided at the upper end of the support column 4 between adjacent detection units 5. The transmitter 1 is mounted on the upper and lower sides of one detection unit 5 and the receiver 2 is mounted on the upper and lower sides of the other detection unit 5. Two beams are vertically formed between one of the upper and lower transmitters 1 and the other upper and lower receivers 2 between adjacent detectors 5 so as to be wary. In such an example, it is determined that an intruder has invaded when two beams are blocked at the same time, and a small animal is invaded when one beam is blocked. It is possible to discriminate between and prevent malfunctions caused by the invasion of small animals.

  However, in the above two-beam type, since two transmitters 1 are provided in one detection unit 5 and two receivers 2 are provided in the other detection unit 5, two transmissions are performed as shown in FIG. Since the transmission from the transmitter 1 may interfere with each other and the transmission from one transmitter 1 may be detected by the two receivers 2, a small animal or the like invades as shown in FIG. When detected, even if the beam from one transmitter 1 is interrupted, the transmission from the other transmitter 1 may be received by the two receivers 2 of the other detection unit 5, and small animals and the like are detected. Despite being present in the area, it may be difficult to detect entry of small animals or the like. For this reason, it is determined that small animals are present, and it is impossible to take measures such as chasing away with sound or light or urging the resident to pay attention. There is a risk of false detection as an intruder intrusion.

  Moreover, there are many cases where there is planting on the indoor side of the fence 3a, and obstacles such as planting are present in the alert area, so that it is impossible to be alert in the alert area and intruders cannot be detected. is there.

  The present invention was invented in view of the above-described conventional problems, and can detect humans more reliably by suppressing erroneous detection of entry of small animals and the like without being affected by mutual interference between two transmission signals. Another object of the present invention is to provide a detection device that can reliably detect a person even when an obstacle such as planting is present in a warning area.

  In order to solve the above problems, the detection device according to the present invention is provided with a plurality of detection units 5 at predetermined intervals in the horizontal direction, and the transmitter 1 and the reception are provided to one detection unit 5 between adjacent detection units 5. The transmitter 2 is provided so as to be positioned up and down, and the other detection unit 5 is provided with the transmitter 1 and the receiver 2 so that the vertical position of the one detection unit 5 is reversed. The transmitter 1 and the receiver 2 of the other detection unit 5 are characterized in that the receiver 2 of one detection unit 5 and the transmitter 1 of the other detection unit 5 face each other. By configuring as described above, each detection unit 5 recognizes the presence or absence of a reflected signal from the detection object of the signal sent by itself in addition to the transmission signal from the other detection unit 5, thereby providing an object in one warning area. It is possible to identify whether there is an object or both of the two warning areas have detected an object. That is, when there is no transmission signal from the other detection unit 5 and there is no reflection signal from the detection object, it can be determined that only one warning area is detected, and the transmission signal from the other detection unit 5 is If there is no reflected signal from the detected object, it can be determined that both of the warning areas are detected. As a result, it is possible to reliably determine that there is a small animal or the like when one alert area is detected. Furthermore, in the prior art, since two warning areas are watched from the same direction, it is difficult to recognize that only one warning area is detected due to the influence of mutual interference of two signals. As described above, detection of only one alert area can be accurately recognized. Accordingly, it is possible to more reliably detect a person by suppressing erroneous detection of intrusion of a small animal or the like without being affected by mutual interference between two transmission signals.

  Further, when transmitting a transmission signal from the transmitter 1 to the opposite receiver 2 and receiving the transmission signal by both the opposite receivers 2, it is determined that there is no person and the transmission signal is opposed to the opposite receiver. 2, when receiving only by the receiver 2 of the same detection unit 5 as the transmitter 1 that transmitted the transmission signal, it is determined that there is a person, and the transmission signal is received by the same detection unit 5. When the time received only by the receiver 2 continues for a certain period of time, it is determined that an obstacle exists between the one detection unit 5 and the other detection unit 5, and the reflected light from the obstacle The transmission signal is received by the receiver 2 of the same detector 5, and the voltage level is detected to switch to the reflection type for determining the presence or absence of a person. When an object is detected in the alert area between the transmitter / receivers 1 and 2 of the adjacent detectors 5, the object is recognized as a person, but if an obstacle such as planting is always present, the obstacle is always detected. Therefore, if an object that exists for a certain period of time (about 1 minute) is detected, it is determined that an obstacle such as planting is present, and each detection unit 5 uses the area up to the obstacle as a warning area. There is a need. That is, in this state, when an object is detected between each detection unit 5 and the obstacle, it is necessary to recognize it as a person. Therefore, when a fixed obstacle enters between one detector 5 and the other detector 5 as described above, the transmitter 1 of the same detector 5 is reflected by the obstacle after a certain time. Is switched to a reflection type that forms a beam between the detector 2 and the receiver 2 so that each detection unit receives a signal reflected by an obstacle instead of a normal reception signal. If an object enters between the detection unit and the obstacle in this state, it can be recognized as a person by detecting a change in the reflected signal. If the presence of the obstacle is canceled, the normal state in which the area is watched is returned from both directions. Therefore, a person can be reliably detected even when an obstacle such as planting is present in the alert area.

  It is also preferable that the upper and lower transmitters 1 and receivers 2 are assembled into a unit to form a detection unit 5a, and the detection unit 5a can be fixed upside down at a position where the detection unit 5 is provided. . In this case, it is possible to use the same detection unit 5a by simply attaching the detection unit 5a upside down with the adjacent detection units 5.

  Since the present invention is configured as described, it is possible to detect a person more reliably by suppressing erroneous detection of intrusion of a small animal or the like without being affected by mutual interference between two transmission signals. There is an effect that a person can be reliably detected even when an obstacle such as the above exists in the alert area.

It is a perspective view which shows an example of embodiment of this invention. It is a perspective view explaining the detection state of the detected object same as the above. It is a perspective view explaining the other detection state of the detected object same as the above. It is a perspective view explaining the other detection state of the detected object same as the above. It is a perspective view explaining the other detection state of the detected object same as the above. It is a perspective view which shows a prior art example. It is a perspective view explaining the problem of a prior art example.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  As shown in FIG. 1, the building exterior 3 is a fence 3 a in this example, and is supported by struts 4 erected at appropriate intervals. And the detection part 5 is each provided in the position corresponding to the support | pillar 4 on the fence 3a. The detection units 3 are provided at equal intervals, and the interval A at which the detection units 5 are provided is 2 m, for example. In the case of this example, the detection unit 5 is formed by a detection unit 5a that is unitized by incorporating a transmitter 1, a receiver 2, a control unit, a notification unit, and the like. The detection unit 5a is provided with a transmitter 1 and a receiver 2 spaced apart from each other in the vertical direction.

  Between the adjacent detectors 5, the transmitter 1 and the receiver 2 are provided on one detector 5 so as to be positioned up and down, and the other detector 5 has a vertical position opposite to that of the one detector 5. Are provided with a transmitter 1 and a receiver 2, a transmitter 1 of one detection unit 5 and a receiver 2 of the other detection unit 5, and a transmission of the receiver 2 of one detection unit 5 and the other detection unit 5. In this example, the detection unit 5a is fixed upside down in the adjacent detection units 5 to realize the above structure.

  A security device is constituted by the detection device as described above, and the detection unit 5a as the detection unit 5 always transmits a transmission signal such as a prescribed infrared ray from the transmitter 1 as indicated by arrows a and b, and a receiver. 2, a transmission signal such as infrared rays is received from the other detection unit 5 a. In this state, if the transmission signal is continuously received, it is determined that there is no intruder. The operation when a detected object enters the upper and lower two warning areas connecting the transceivers 1 and 2 of each detection unit 5a will be described below. Here, for convenience of explanation, one detection unit 5a is referred to as a detection unit 5a1, and the other detection unit 5a is referred to as a detection unit 5a2.

  As shown in FIG. 2, when the detected object 6 enters one of the two upper and lower warning areas (the lower side in this example), the detection unit 5a1 adds the transmission signal as indicated by the arrow a. The reflected signal as indicated by the arrow c from the detected object 6 is received. At this time, since the reflected signal level (voltage level) is sufficiently smaller than the normal transmission signal, it is determined to be equivalent to the normal signal. As a result, the normal state (no intruder) is determined. On the other hand, in the detection unit 5a2, it is determined that the detected object 6 exists only in the alert area on one side because there is no reception signal. It is possible to determine a light animal intrusion or a planting intrusion by the detection by the detection units 5a1 and 5a2 as described above, and to perform a light alarm that prompts attention. When the detected object 6 enters the upper warning area, the operations of the detection units 5a1 and 5a2 are reversed.

  As shown in FIG. 3, when the detected object 6 enters both the warning areas, the detection unit 5a1 receives only the reflected signal as indicated by the arrow c from the detected object 6. Thereby, the detected object 6 is determined to be an intruder 6a and is determined to have an intruder. In this case, an intimidation warning by sound and light, notification to the home, etc. are carried out. The detection unit 5a2 also receives only the reflected signal as indicated by the arrow d from the detected object 6. Accordingly, the detected object 6 is determined to be an intruder 6 and is determined to have an intruder, and is handled in the same manner as the detection unit 5a1.

  Also, as shown in FIG. 4, when the stay of the detected object 6 continues in both the warning areas, the detection unit 5a1 continues to receive only the reflected signal as indicated by the arrow c from the detected object 6. At this time, the state where there is an intruder as shown in FIG. 3 is set, but when this reception state continues for a certain period of time (set sufficiently longer than the time required for the intruder to enter, for example about 1 minute) It is determined that the detected object 6 is not an intruder but an obstacle 6b such as planting and the obstacle 6b exists. In this case, it is also possible to perform caution notification that prompts the adjustment work for removing the obstacle. The detection unit 5a2 also continues to receive only the reflected signal as indicated by the arrow d from the detected object 6. At this time, an intruder is present as shown in FIG. 3, but if this reception state continues for a certain period of time, the detected object 6 is not an intruder but an obstacle 6b such as planting. It is determined that 6b exists.

  In the stay state of the obstacle 6b as shown in FIG. 4, it is warned that the intruder 6a enters between the obstacle 6b and the detection units 5a1 and 5a2. In other words, after the detected object 6 is determined to be the obstacle 6b, it is switched to the reflective type that warns with the reflected signal. As shown in FIG. 5, when the intruder 6a enters from the staying state of the obstacle 6b, the detection unit 5a1 receives only the reflected signal as indicated by the arrow c 'from the intruder 6a. At this time, the reflected signal from the intruder 6a has a higher reception level (voltage level) than the reflected signal from the obstacle 6b. In this case, a threatening warning is issued by sound and light, and notification to the home is performed. The detection unit 5a2 continuously receives the reflected signal from the obstacle 6b. When an intruder 6a in the warning area on the detection unit 5a2 side enters, the operations of the detection unit 5a1 and the detection unit 5a2 are reversed.

  When the obstacle 6b is removed from the states of FIGS. 4 and 5, the normal signal transmission / reception state is restored as shown in FIG. 1, and the normal control is restored.

  In the example of the above embodiment, the example of the crime prevention device in which the detection unit 3a is attached to the fence 3a as an example of the building exterior 3 has been described. However, in addition to the fence 3a as the building exterior 3, a fence, a gate, a garage The same can be applied to a gate or the like.

1 Transmitter
2 Receiver 4 Strut 5 Detection unit 5a Detection unit

Claims (2)

  A plurality of detection units are provided at predetermined intervals in the horizontal direction, and a transmitter and a receiver are provided vertically on one detection unit between adjacent detection units, and one detection is performed on the other detection unit. The transmitter and the receiver are provided so that the vertical position is opposite to that of the unit, the transmitter of one detection unit and the receiver of the other detection unit are connected to the receiver of one detection unit and the other detection unit. A detection device that faces the transmitter, transmits a transmission signal from the transmitter to the opposite receiver, and when receiving the transmission signal by the opposite receiver, determines that there is no person, When the transmission signal is not received by the opposite receiver but is received only by the receiver of the same detection unit as the transmitter that transmitted the transmission signal, it is determined that there is a person, and the transmission signal is If the time received only by the receiver of the detector continues for a certain period of time, one detector and the other detector The transmission signal reflected by the obstacle is received by the receiver of the same detection unit, and the voltage level is detected to detect the presence or absence of a person. A detection device characterized by switching to a reflective type for determination.   The detection apparatus according to claim 1, wherein a detection unit is formed by incorporating upper and lower transmitters and receivers into a unit, and the detection unit can be fixed upside down at a position where the detection unit is provided.

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