JP2007286731A - Method for detecting mobile body or the like - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for detecting a mobile body or the like, capable of accurately detecting a transmitting object in a specific area and whether it is permitted or not to manage and secure the transmitting object. <P>SOLUTION: A motion detection part 1 confirms presence by transmitting radio wave to a specific area 6 and detecting the reflected wave therefrom. A radio wave receiving part 2 receives radio wave from an ID tag 9 of the transmitting object 8 and confirms its presence, determination for whether it is a permitted body or not, and behavior control of the transmitting object 8. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a moving body detection method for determining whether a transmitting body such as a forklift entering and exiting a building or the like or a transmitting body such as a human is permitted or not, and enabling movement management of the transmitting body.

Various things go in and out of buildings, etc., but as the buildings are often opened and closed, it is possible to judge whether it is permitted or not permitted to enter and leave the building. is necessary. In this case, for example, an ID tag may or may not be provided on the determined side. In addition, when it is necessary to manage the movement of the transmitting / receiving body, it is necessary to accurately grasp this, but this detection is insufficient in the prior art.
On the other hand, there are “Patent Document 1” and “Patent Document 2” as one of known techniques similar to the present invention.
Japanese Patent Laying-Open No. 2005-11137 (FIG. 1) JP-A-3-171398 (FIG. 1)

The “way-up wireless communication system” disclosed in “JP-A-2005-11137” of “Patent Document 1” determines and controls permission or non-permission of a moving body entering and leaving a fixed body such as a building by wireless radio wave communication. There is a point similar in configuration to the present invention, but this is a way-up type as in the “name of the invention”, and the moving body is the fixed body. It is configured to receive radio waves only when they are close to each other at a certain distance, and is characterized by reduced radio wave consumption.
In addition, the “intruder detection system” of “JP-A-3-171398” of “Patent Document 2” is similar in purpose and configuration to the present invention to be described later, but the configuration content is rough, and the device structure Is unclear, and there is a problem that the specific area as in the present invention is not limited with respect to the communication area, and permission or non-permission of the transmitter cannot be accurately determined.

  The present invention has been invented in view of the above circumstances, and accurately and sufficiently determines and determines whether a transmitter existing in a specific area or communication area is a permitted body or a non-permitted body. An object of the present invention is to provide a detection device such as a moving body and a detection system using the detection device.

  In order to achieve the above object, according to the present invention, the invention according to claim 1 radiates a radiated wave having a predetermined frequency to a specific area and receives a reflected wave from a target object in the specific area. Detecting a phase change between the wave signal component and the reflected wave signal component, and detecting a motion of the target object in the specific area; and the predetermined frequency of the motion detection unit provided in the target object A transmitter (with a tag) that transmits an identification signal (ID signal) having a frequency different from that of the transmitter and a radio wave receiver that receives the identification signal from the transmitter and demodulates the identification signal A body detection method, wherein the transmission of the identification signal is transmitted from the target object at a substantially constant interval or the movement of the target object is detected to start transmission, and the transmitter and the radio wave Wireless reception Communication area between the parts is characterized in that it is formed wider than the specific area.

  The invention of claim 2 is characterized in that the predetermined frequency of the motion detection unit is 1 GHz to 30 GHz, and a transmission frequency from the transmitter is 10 MHz to 3 GHz.

  The invention according to claim 3 is characterized in that an adjusting means for adjusting a radiation range of the radio wave from the antenna is provided around the antenna that radiates the radio wave from the motion detection unit.

  According to a fourth aspect of the present invention, the adjusting means includes a plate-shaped hood surrounding the periphery of the antenna, and adjusts the radiation range of the radio wave by changing the shape thereof.

  The invention of claim 5 is characterized in that the plate-like hood is provided with a radio wave absorber on the inner surface thereof.

  The invention according to claim 6 is characterized in that either the antenna of the motion detection unit and the antenna of the radio wave reception unit or both antennas are cable-connected to the main body of the detection device such as a moving object. .

  The invention according to claim 7 is characterized in that the moving body detection device includes an infrared communication mechanism for adjusting detection sensitivity of the motion detection unit.

  The invention of claim 8 is a method of detecting a moving body (target object) by the moving body detection apparatus according to any of claims 1 to 7, wherein the method includes a detection signal of the motion detection unit and the detection signal. It has an output port that outputs each of the ID signals demodulated by the radio wave radio reception unit independently or in combination, and determines whether it is a permitted body or a non-permitted body based on the signal of the output port, or the received ID signal is the permission It is characterized by determining whether it is what was done.

  The invention according to claim 9 includes a plurality of detecting devices such as a moving body, and one of the detecting devices such as the moving body or one of the detecting devices adjacent to the moving body receives the ID signal from the transmitter. In such a case, it is determined that the transmitter is an authorized body.

  According to the “moving object detection method” of claim 1 of the present invention, the main configuration of the apparatus is composed of two parts, a motion detection unit and a radio wave reception unit. Management is performed more accurately and reliably.

  In addition, according to the “moving object detection method” of claim 2 of the present invention, since the frequency (predetermined frequency) from the motion detection unit and the transmission frequency from the transmitter are different from each other, the determination from both is accurate. Can be.

  Further, according to the “moving object detection method” of claim 3 of the present invention, the radio wave radiation range of the motion detection unit can be freely adjusted, and it corresponds to the type, size, location, etc. of the transmitter. This makes it possible to radiate optimal radio waves and manage mobile objects more reliably.

  Further, according to the “moving object detection method” of claim 4 of the present invention, the adjusting means is composed of a plate-shaped hood, and the adjustment of the radiation range of the radio wave is performed relatively easily and at a relatively low cost. be able to.

  According to the “moving object detection method” of claim 5 of the present invention, by providing a radio wave absorption body on the inner surface of the plate-shaped hood, leakage outside the plate-shaped hood due to unnecessary reflected waves of radio waves is prevented. It is possible to reliably radiate radio waves to a specific area.

  According to the “moving object detection method” of claim 6 of the present invention, the transmission signal is received when the moving distance is long by connecting the antenna of the motion detecting unit and the antenna of the radio wave receiving unit to the main body with a cable. Is done more accurately.

  According to the “moving object detection method” of claim 7 of the present invention, the detection sensitivity of the motion detection unit of the device installed at a high place can be freely adjusted. This makes it possible to manage the transmitter more accurately.

  Further, according to the “detection method” of claim 8 of the present invention, it is possible to determine a large number of devices by a determination unit of one personal computer by outputting the ID signal independently or combined with the ID signal and connecting to the LAN. Body and non-permitted body can be accurately determined, and whether the ID signal from the permitted body is permitted, the transmission body can be managed accurately, and the non-permitted body can be excluded. it can.

  In addition, according to the “detection method” of claim 9 of the present invention, since a transmitter is determined by reception by a plurality of adjacent mobile detection devices instead of determination by only one mobile detection device, a false detection is performed. Can be prevented and the determination is made more accurately.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a moving body detection method of the present invention will be described in detail below with reference to the drawings.
FIG. 1 is a schematic configuration diagram of a moving body detection apparatus 100 used in the method of the present invention. The moving body detection apparatus 100 includes a motion detection unit 1 and a radio wave reception unit 2, which are housed integrally in the case 3. A microwave annate 5 surrounded by adjusting means 4 is connected to the motion detector 1, thereby transmitting a radio wave to the specific area 6 and receiving and detecting a reflected wave from the specific area 6.
On the other hand, an antenna 7 is connected to the radio wave receiver 2 to receive and detect an ID signal from the ID tag 9 of the transmitter 8 provided in the target object. The antenna 7 includes an antenna 7 that is directly connected to the radio wave receiver 2 and an antenna 7 a that is connected via a cable 10. The case 3 is provided with various output ports 13 and is connected to the outside (for example, a LAN). In addition, a determination unit 11 (such as a personal computer) that determines whether the transmitter 8 in the specific area 6 is correct is provided inside or outside the case 3, and the determination unit 11 is connected to an alarm unit 12. Note that the communication area 14 is wider than the specific area 6 so that the ID signal from the transmitter 8 can be received even if the transmitter 8 protrudes from the specific area 6. Further, the moving body detection device 100 is provided with an infrared communication mechanism unit 15 for adjusting the detection sensitivity of the motion detection unit 1. The infrared communication mechanism unit 15 includes a mechanism unit main body 15a disposed on the case 3 side and an adjusting device 15b separated from the case 3, but is not limited thereto. Moreover, although the predetermined frequency of the motion detection part 1 is 1 GHz to 30 GHz and the transmission frequency of the transmission body 8 is 10 MHz to 3 GHz, of course, it is not limited to this. In addition, the motion detection unit 1 is provided with a control unit 16 for setting a reception amplification degree, a detection level, and the like.

  FIG. 2 is a block diagram showing a detailed configuration of the motion detection unit 1. As illustrated, the microwave antenna 5 includes a transmitting antenna 5a and a receiving antenna 5b. The motion detection unit 1 has the configuration shown in the figure, and the radiated wave for transmission from the oscillator (1) is amplified from the oscillator (1) via the distributor (1), and is transmitted from the transmission antenna 5a of the microwave antenna to the transmission body 8. Sent. On the other hand, the signal from the oscillator (1) separated by the distributor (1) is mixed by the mixer (1), amplified through the LPF (filter) (1), and sent to the phase demodulator 17. On the other hand, the radio wave received by the microwave antenna 5b is amplified and mixed by the mixer (2) with the signal distributed from the oscillator (2) by the distributor (2), amplified through the LPF (2), and phase demodulator 17 Here, a change in phase is detected as a signal from the mixer (1), output from the output port (13) (FIG. 1) to the LAN side, sent to the determination unit 11, and confirmed by the transmitter 8 I do.

  FIG. 3 is a schematic diagram showing an actual form of the moving body detection apparatus 100. A case 3 in FIG. 1 is formed of a box as shown in FIG. 3, and all of the motion detection unit 1, the radio wave reception unit 2, the control unit 16, and the like are accommodated in the box. Further, a microwave antenna 5 is provided outside the box, and the microwave antenna 5 is surrounded by the adjusting means 4 (specifically, a plate-shaped hood 4a). The plate-shaped hood 4a determines the range of radio waves transmitted from the microwave antenna 5, and the range of radio waves can be changed by changing the shape. Thereby, the radio wave corresponding to the shape of the specific area 6 can be transmitted. In addition, a radio wave absorber (not shown) is provided inside the plate-shaped hood 4a to prevent leakage of radio waves from the plate-shaped hood 4a. An antenna 7, an output port 13, a power supply terminal 18 and the like are provided on the outside of the box.

Next, referring to FIG. 1, the operation of the moving body detection method of the present invention will be described. The radiated radio wave transmitted from the microwave antenna 5 is transmitted to the specific area 6 side, and the reflected wave from this is input to the motion detection unit 1 via the microwave antenna 5. The motion detector 1 determines the presence of a transmitter in the specific area 6. When a radio wave is transmitted from the transmitter 8 that has the ID tag 9, the antenna 7 or 7 a receives it and the radio wave receiver 2 receives the radio wave. Thereby, the transmission body 8 having the unique ID tag 9 is recognized, and it can be determined whether the transmission body 8 is a permitted body or a non-permitted body. Even if the transmitter 8 leaves the specific area 6, there is reception from the ID tag 9 in the communication area 14, so that the movement management of the transmitter 8 is accurate without receiving only a motion signal and issuing an alarm accidentally. To be done.
Moreover, although the permission body and the non-permission body are determined by transmission from the ID tag 9, it is also determined whether or not the ID tag 9 is from the ID tag 9 for which the ID signal is permitted, and a correct determination is performed. be able to.

  In the above description, the case where the radio wave from the transmitter 8 and the radio wave from the specific area 6 are separately processed has been described. However, as shown in FIG. The contents received by the radio wave receiver 2 and the motion detector 1 can be input to the determination unit 11 located outside via the output port 13 to manage the transmitter 8 and the specific area 6.

  FIG. 4 shows a plurality (three in the figure) of the moving body detection devices 100 arranged adjacent to each other. These are all connected to the permit body determination unit 19 and configured to determine the transmitter 8. When the radio wave from the ID tag 9 of the transmission body 8 is sent to one detecting device 100 such as a moving body and the determination of the transmission body 8 is performed as described above, when the ID tag 9 is behind the transmission body 8 In some cases, it may not be possible to receive data with a single detection device such as a moving body. In order to prevent this, a signal from the ID tag 9 can be input to the adjacent moving body detection device 100, and when the adjacent moving body detection device 100 receives the signal of the ID tag 9, the signal is transmitted. It is configured so that the body 8 can be determined. Thereby, determination of the permission body or non-permission body of the transmission body 8 is performed more correctly.

  As described above, the present invention determines the permitted body or non-permitted body of a transmitter that enters and exits a building or the like. However, its applicability is extremely wide, and all distribution centers, hospitals, nursing homes, schools, It is also applicable to public facilities, customs warehouses, restricted entry areas, and other facilities, and its range of use is extremely wide.

The block diagram which shows the outline | summary structure of detection apparatuses, such as a moving body of this invention. The block diagram which shows the internal structure of the motion detection part in this invention. The schematic diagram which shows one of the specific shapes of detection apparatuses, such as a moving body of this invention. The schematic diagram which shows the structure for arrange | positioning multiple detection apparatuses, such as a moving body of this invention, and determining the permission body and non-permission body of a transmission body correctly.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Motion detection part 2 Radio wave receiving part 3 Case 4 Adjustment means 4a Plate-shaped hood 5 Microwave antenna 5a Microwave antenna for transmission 5b Microwave antenna for reception 6 Specific area 7 Antenna 7a Antenna 8 Transmitter 9 ID tag 10 Cable 11 Judgment unit 12 Alarm unit 13 Output port 14 Communication area 15 Infrared communication mechanism unit 15a Mechanism unit body 15b Adjustment device 16 Control unit 17 Phase demodulator 18 Power supply terminal 19 Permitted body judgment unit 100 Moving body detection device

Claims (9)

  Radiating a radiated wave having a predetermined frequency to a specific area, receiving a reflected wave from a target object in the specific area, detecting a phase change between the radiated wave signal and the reflected wave signal; and A motion detection unit that detects the movement of the target object in the transmitter, and a transmitter (with a tag) that is included in the target object and transmits an identification signal (ID signal) having a frequency different from the predetermined frequency of the motion detection unit ) And a radio wave receiving unit that receives the identification signal from the transmitter and demodulates the identification signal, and the like. Transmitting at intervals or detecting movement of the target object and starting transmission, the communication area between the transmitter and the radio wave receiver is formed wider than the specific area Mobile such detection method comprising and.   The method according to claim 1, wherein the predetermined frequency of the motion detection unit is 1 GHz to 30 GHz, and a transmission frequency from the transmitter is 10 MHz to 3 GHz.   The method for detecting a moving object or the like according to claim 1, wherein an adjustment unit for adjusting a radiation range of the radio wave from the antenna is provided around the antenna that radiates the radio wave from the motion detection unit.   The method according to claim 3, wherein the adjustment unit includes a plate-shaped hood that surrounds the periphery of the antenna, and adjusts a radiation range of the radio wave by changing a shape of the hood.   The said plate-shaped hood consists of what provided the electromagnetic wave absorber on the inner surface, The moving body detection method of Claim 4 characterized by the above-mentioned.   The moving body according to claim 1, wherein the antenna of the motion detection unit and the antenna of the radio wave reception unit or both antennas are cable-connected to a main body of a detection device such as a moving body. Detection method.   The method for detecting a moving body or the like according to any one of claims 1 to 6, wherein the moving body or the like detection device includes an infrared communication mechanism for adjusting a detection sensitivity of the motion detection section.   8. A method of detecting a moving body (target object) by the mobile body detecting device according to claim 1, wherein the method includes a detection signal of the motion detection unit and an ID signal demodulated by the radio wave reception unit. Are output independently and synthesized, and based on the signal of the output port, it is determined whether it is a permitted body or a non-permitted body, or whether the received ID signal is the permitted one or not. A moving object detection method characterized by the above. When the mobile body detection device includes a plurality of the mobile body detection devices and one of the mobile body detection devices or any of the mobile body detection devices adjacent thereto receives the ID signal from the transmission body, the transmission body The method for detecting a moving object according to claim 8, wherein it is determined that the object is a permitted object.

Images