Abstract: A transmitter comprises a signaling history information transmission unit. After the transmitter generates a detection signal, the signaling history information transmission unit sends corresponding signaling history information to a regular signal transmission unit. From this regular signal transmission unit, the signaling history information and a regular signal are transmitted to a receiver. The signaling history information contains a count value which is updated at every transmission of the information. Even if the transmitter generates a detection signal during a communication failure, the receiver can identify a time when the transmitter generated the detection signal, based on a received count value.

Abstract: Sensor(s) may be such that light-projecting component(s) and light-receiving component(s) are arranged therein. Furthermore, such sensor(s) may be provided with optical path varying means for varying projected light optical path(s) and/or received light optical path(s) so as to physically vary overlapping zone(s) in which the projected light optical path(s) and the received light optical path(s) at least partially overlap. The optical path varying means may carry out adjustment of optical sensitivity by increasing the extent(s) of the overlapping zone(s) when carrying out detection with respect to zone(s) distant from such sensor(s) and/or decreasing the extent(s) of the overlapping zone(s) when carrying out detection with respect to zone(s) proximate to such sensor(s).

Abstract: A sensor has a trigger level that is set in advance in which a distance to a detected object and a signal level of waves reflected from the object are associated. The sensor only dispatches an object detection signal indicating that the detected object is an object to be considered as a detection target having a size larger than a predetermined size when a reflected wave that has a signal level exceeding the trigger level is received.

Abstract: For a carrier wave carrying a microwave from an MW sensor 1, pulse intervals are varied between when the MW sensor 1 generates an alert and when the MW sensor 1 does not generate an alert. When checking a sensing area, an operator carries a receiver being able to receive a transmitted wave from the MW sensor 1, walks around an area thought to be the sensing area and checks a monitor screen of the receiver. In this way, the sensing area can be checked at hand by the operator.

Abstract: Sensor(s) may be such that light-projecting component(s), at which light is irradiated from one or more light-projecting elements by way of lens group(s); and light-receiving component(s), at which at least a portion of light irradiated from such light-projecting component(s) is incident on one or more light-receiving elements by way of lens group(s) after having been reflected, are arrayed therein. Lens group(s) is/are divided into a plurality of lens sets comprising a plurality of lenses. A plurality of lens sets are arranged so as to be inclined in V-shaped fashion such that a plurality of lenses occupy respectively symmetric locations.

Abstract: To provide an anti-thief security sensor assembly capable of automatically setting a projecting power in such a manner that a received beam amount of the anti-thief security sensor assembly for detecting an infrared beam interrupted to sense an intruder attains a predetermined value during an optical axis adjustment, the anti-thief security sensor assembly includes an infrared beam projecting unit (1) for emitting the infrared beam (IR), and an infrared beam receiving unit (2) for receiving the infrared beam (IR). The infrared beam receiving unit (2) has a received beam amount detector (26) for detecting the received beam amount, and a signal transmitter (28) for transmitting a received beam level display signal (L) indicative of the amount of the received beam detected to the infrared beam projecting unit (1).

Abstract: The combined sensor of the present invention is comprised of an MW sensor and a PIR sensor, in which the frequency difference of two microwaves transmitted by the MW sensor is set such that the phase difference between the IF signals received by the MW sensor is approximately 180° when there is an object at the intermediate distance between the maximum detection distance within the target detection area and the maximum detection distance in the event of a deviation of the detection area attributable to mounting error of the infrared sensor 4.

Abstract: Door sensor(s) may be attached to a door body or bodies of automatic swing doors. The door sensor(s) may be equipped with door position detectors including geomagnetic sensor(s), the sensor(s) being itself or themselves capable of detecting position(s) occupied by the door body or bodies during opening and/or closing thereof. During opening and/or closing of the door body or bodies, determination may be made as to whether detected object(s) are object(s) intended for detection; and in the event that object(s) are object(s) intended for detection, opening and/or closing of the door body or bodies may be stopped, slowed, and/or reversed in correspondence to detected position(s) occupied by the door body or bodies during opening and/or closing thereof.

Abstract: To provide an anti-thief security sensor assembly in which the angle of an optical unit can be adjusted over a wide range without increasing the size thereof and in which an optical axis can easily be adjusted, the security sensor assembly includes an optical unit (14) mounted at its lateral sides on a support member (9) of a device body (4) for rotation about a horizontal pivot axis (24) for projecting or receiving a detecting wave. A drive gear (29) is rotatably mounted on the support member (9) and positioned laterally of the optical unit (14) and adapted to be manually turned. A driven gear (39) is mounted on a lateral side of the optical unit (14) and is drivingly meshed with the drive gear (29). The driven gear (39) is rotatable together with the optical unit (14) about a horizontal pivot axis (11).

Abstract: In a multistage active infrared sensor, light emitters 11A, 11B, 11C emit infrared signals which contain distinct channel information. These light emitters 11A, 11B, 11C emit the infrared signals at different timings from each other. The sensor judges whether the infrared signals received by light receivers 12A, 12B, 12C contain channel information of opposite light emitters 11A, 11B, 11C. The sensor cancels any infrared signal which does not contain the channel information of the opposite light emitters 11A, 11B, 11C.

Abstract: To provide an intrusion detecting device capable of generating one of different warnings in proper timing dependent on the behavior of an intruder entering an alert region to thereby browbeat the intruder effectively, the intrusion detecting device (1) includes a plurality of sensor units (8 and 9), a sound generating device (29) capable of generating first and second warnings different from each other one at a time, and a warning generating unit (23). The sensor units (8 and 9) have a plurality of alert areas (A1 to A4) defined from a site distant from and to another site near to a subject to be monitored for security purpose and operable to detect an intruder H entering any of the alert areas (A1 to A4).

Abstract: An optical transmitter is equipped with a transmitted pulse modulator at which a plurality of optical transmission patterns have previously been stored. The respective stored optical transmission patterns have mutually different ratios between infrared pulse ON times and OFF times. The optical output of infrared signal(s) transmitted from an optical transmitter is made variable as a result of the fact that infrared pulse(s) output during infrared output period(s) is/are output in accordance with an optical transmission pattern which is selected from among the plurality of optical transmission patterns.

Abstract: An intruder detection device provides first and second detection areas which are covered by first and second PIR sensors. When intrusion of an object is detected in these areas, the detection signals are amplified by amplifiers, and then processed in a control unit such that orders for generating alarms are output from alarm output units to a monitoring station. While these processed detection signals are output to the alarm output units, the control unit sends other processed signals to LED display units, so that the LED display units turn on alarm lights. The intruder detection device also has a device for separating the object detection areas of the first and second PIR sensors such that their detection areas do not overlap.

Abstract: In an auxiliary safety sensor 6 which has a first sensor set composed of a first transmitter 61 and a first receiver 63 located opposite to each other and a second sensor set composed of a second transmitter 62 and a second receiver 64 located opposite to each other, a test operation is performed by emitting a light beam only from the first transmitter 61. The state of misconnection is confirmed when a connection point 73 for the first receiver 61 does not receive predetermined light acceptance data for the amount of received light. To solve the misconnection, the light acceptance data based on the signals from the receivers 63, 64 are exchanged between each other, before they are supplied to the data acquisition means 8.

Abstract: MW sensor 1 in one or more embodiments of the present invention is equipped with distance identifying means 41 capable of calculating relative distance(s) from the distance identifying means to object(s) at least partially within protected area(s) based on reflected wave(s); moved distance identifying means 42 capable of calculating moved distance(s) per unit time of object(s) at least partially within protected area(s); and object determination means 43 capable of receiving output(s) from distance identifying means 41 and moved distance identifying means 42, and capable of carrying out object detection determination operations(s) such that moved-distance-per-unit-time value(s), at least one of which serves as trigger value for object detection determination, is or are set lower as relative distance(s) to object(s) at least partially within protected area(s) grow smaller.

Abstract: To provide an anti-thief security sensor assembly wherein an optical axis of a beam projecting unit can be accurately aligned with that of a beam receiving unit, the anti-thief security sensor assembly includes a beam projecting unit 1 for projecting an infrared beam IR and a beam receiving unit 8 for receiving the infrared beam IR. The beam projecting unit 1 includes a projector cover 21A detachably mounted on a mounting base 20A for enclosing and protecting a sensor circuit on the mounting base 20A, an opening detecting switch 7 for detecting a physical opening of the projector cover 21A, and a projected beam suppressing circuit 4 operable in response to detection by the opening detecting switch 7 to reduce a quantity of the infrared beam emitted from the beam projecting unit 1 to thereby reproduce the infrared beam of a quantity substantially equal to that having passed through the projector cover 21A.

Abstract: An automatic door system capable of distinguishing between a door closing action for when an object leaves a prescribed area, which results from a “signal discontinuation due to the exit of an object”, and a door closing action for when an object remains stationary within the area for a certain period of time, which results from a “forced signal discontinuation in the presence of a stationary object”. Regarding the latter case, the automatic door system protects a person who stops in the area by setting the door to close at a low speed and/or issuing a vocal warning. The door closing action of the automatic door system can thereby reduce the risk of hitting the person with the door.

Abstract: The digital image recording system of the present invention comprises event storage unit for storing, on occurrence of an event, the order of such occurrence, importance level storage unit for storing the importance level of the event, and image acquisition unit for sequentially importing the image information from a plurality of image taking unit connection with each event and recording it in accordance with the information stored in these storage unit. On generation of an alarm, the image acquisition unit also stores, by multiprocessing, alarm image information provided from corresponding image taking unit. On occurrence of an event, the event storage unit stores the channel number for the corresponding image taking unit in the order of event occurrence, but does not additionally store such channel if the event storage unit already contains the same channel number as the one for the image taking unit in connection with the event occurrence.