JP2007093354A - Position detection radio system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a position detection radio system of a simple circuit constitution capable of specifying individuals from a wide range such as an exhibition hall and a theme park and detecting their positions. <P>SOLUTION: The position detection radio system comprises slave units 12 and master units 14A and 15B capable of radio communications between one another. A plurality of the slave units 12 and the master units 14A and 15B are provided. Each of the master units 14A and 15B is connected to a processing device 20 for prescribed processings. The slave unit 12 includes both a specific-small-power radio circuit part 16 and a feeble-radio-wave radio circuit part 18. The master unit 14A includes a feeble-radio-wave radio circuit part 24 for verifying the presence of the slave unit 12 on the basis of feeble-radio-wave signals from the slave unit 12. The master unit 15B is provided with a specific-small-power radio circuit part 30, receives specific-small-power radio signals from the slave unit 12, and makes the position of the slave unit 12 detectable. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a position detection radio system that uses radio waves to identify individual subjects and objects and detect positions within a certain range.

  Conventionally, as a method for detecting the position of a person within a certain range, there is a method using an ultrasonic wave or a human sensor. However, since these devices detect passively, it is impossible to send a signal for identifying an individual, and detection by wireless communication is also used for identifying the individual. In addition, there is a method of detecting a specific place where a person is present by wireless communication. However, it is difficult to detect a plurality of persons because of a large amount of communication data and complicated calculation processing.

  In addition, when detecting a large number of people at a short distance, in order to detect a specific place, if the detection range is wide, a large number of radios are required for detection, and if it is outside the detection range The location could not be identified.

On the other hand, as disclosed in Patent Document 1, a transmitter / receiver that sequentially outputs different signal data corresponding to each transmission level while changing the transmission output level in stages is provided to identify the position of a person A position detection system has also been proposed. The position detection system includes a reception unit that receives signal data that is wirelessly output from the transmission device, a detection unit that detects signal data corresponding to the lowest transmission output level among the signal data received by the reception unit, A plurality of receiving devices having output means for outputting the signal data detected by the detecting means, a receiving means for receiving the signal data output from the output means of each of the plurality of receiving devices, and received by the receiving means Specific means for specifying the position of the transmission device based on the signal data is provided.
JP-A-9-120495

  In the case of the technique disclosed in Patent Document 1 of the above-described conventional technique, the system is not a system that can specify the location of a large number of slave units, and is an apparatus that searches for a deaf person by switching the output of a specific low-power radio. The circuit configuration is complicated.

  The present invention has been made in view of the above-mentioned problems of the prior art, and is a position detection radio capable of identifying an individual from a wide range and detecting a position in a venue or a theme park with a simple circuit configuration. The purpose is to provide a system.

  The present invention includes a slave unit and a master unit that can communicate with each other wirelessly, the slave unit and a plurality of master units are provided, and each master unit is connected to a processing device that performs a predetermined process. Is provided with both a specific low power radio circuit unit and a weak radio wave circuit unit so as to be capable of wireless communication with each of the master units, and the master unit detects the presence of the slave unit by a weak radio signal from the slave unit. The at least one first base unit having a weak radio wave circuit unit to be confirmed communicates with the slave unit by a specific low power radio unit with a specific low power radio circuit unit, and a specific small power from the slave unit is transmitted. A plurality of second master units that receive a power radio signal to detect the position of the slave unit, and when the weak radio signal from the slave unit cannot be detected by the first master unit, Communicate by specific low power radio of the second master unit It receives the specified low-power radio signal from the slave unit, the received signal level calculated by said processing unit, a position detection radio system which enables to locate the child machine.

  In addition, a specific low-power radio circuit unit is provided, and an instruction device for giving a predetermined instruction to the child device is provided.

  According to the position detection radio system of the present invention, when detecting the position of a desired slave unit, the weak radio radio and the specific low power radio are used in combination to detect the position of a short-distance slave unit by the weak radio radio, over a wide range. The position detection is performed by specific low-power radio using a plurality of parent devices, and the position detection of the child device at a short distance and the position detection of the child device in a wide range can be easily performed.

  Hereinafter, embodiments of the position detection wireless system of the present invention will be described. 1 to 8 show an embodiment of the present invention. A position detection wireless system 10 of this embodiment includes a slave unit 12, a master unit 14A, and a master unit 15B that can communicate with each other wirelessly. A stand is provided. And the subunit | mobile_unit 12 is provided with both the specific low power radio | wireless circuit part 16 and the weak radio wave radio | wireless circuit part 18. FIG.

  Further, the master unit 14A and the master unit 15B are connected via a LAN 22 via a LAN output interface 19 to a processing device 20 such as a server computer that performs predetermined position specifying calculation processing and other processing operations. One master unit 14A, for example, is provided with three weak radio wave radio circuit units 24 for confirming the presence of the slave unit 12 based on weak radio signal from the slave unit 12. The three master units 14A are arranged with the roles of, for example, the position information detector 26, the entrance / exit detector 27, the floor movement detector 28, and the like.

  The other master unit 15B includes a specific low-power radio circuit unit 30 and is arranged in a suitable plurality to communicate with the slave unit 12 by specific low-power radio, and a specific low-power radio signal from the slave unit 12 And the position of the slave unit 12 can be confirmed by the plurality of master units 15B.

  Further, the position detection radio system 10 of this embodiment includes a specific low power radio circuit unit 32 and a slave unit instruction unit 34 that issues an appropriate instruction to the slave unit 12 via the master unit 15B.

  Next, the structure of the subunit | mobile_unit 12 is demonstrated based on FIG. The subunit | mobile_unit 12 is provided with the control part 40 provided with CPU etc., the display parts 41, such as a liquid crystal monitor connected to the control part 40, and the output parts 42, such as a printer. The control unit 40 is connected to the specific low-power radio circuit unit 16 and the weak radio wave radio circuit unit 18.

  First, in the specific low-power radio circuit unit 16 of the slave unit 12, transmission data of a specific code such as its own ID is output from the control unit 40 and input to a VCO (Voltage Controlled Oscillator Voltage Control Oscillator) 43. A PLL (Phase Locked Loop phase synchronization circuit) 44 is connected to the VCO 43, and oscillation is performed at a predetermined frequency by a voltage from the control unit 40. The VCO 43 and the PLL 44 constitute an oscillation circuit 45 that forms a carrier wave having a predetermined transmission frequency on which a transmission / reception signal is placed. The output of the VCO 43 is connected to the transmission amplifier 46, and the output of the transmission amplifier 46 is transmitted from the antenna 49 via the changeover switch 47 through the band pass filter 48.

  The selector switch 47 is connected to a receiving amplifier 50 to which a received signal received by the antenna 49 and passed through the bandpass filter 48 is input. The output of the receiving amplifier 50 passes through the mixer 51 and is then passed through the bandpass. A predetermined frequency passes through the filter 52 and is input to the amplifier 53. The reception signal amplified by the amplifier 53 is detected by the detection circuit 54 and input to the control unit 40. The control unit 40 receives the received data of the received signal and the reception level of the received radio wave.

  The weak radio wave circuit unit 18 of the slave unit 12 inputs the transmission data from the control unit 40 to the transmission amplifier 56 via the oscillation circuit 55 having the same configuration as described above, and the output of the transmission amplifier 56 is a changeover switch. The signal is transmitted from the antenna 59 via the band pass filter 58 via 57. The selector switch 57 is connected to a receiving amplifier 60 to which a received signal received by the antenna 59 and passed through the bandpass filter 58 is input. The output of the receiving amplifier 60 passes through the mixer 61 and is then supplied to the bandpass filter. A predetermined frequency passes through 62 and is input to the amplifier 63. The reception signal amplified by the amplifier 63 is detected by the detection circuit 64 and input to the control unit 40. Even in the weak radio circuit unit 18, the reception data and the reception level of the received radio wave are input to the control unit 40.

  Further, as shown in FIG. 3, the weak radio wave circuit unit 24 of the main unit 14A has the same configuration as the weak radio circuit unit 18 of the slave unit 12, and transmits a specific code such as its own ID from the control unit 70. Data is output and is input to the transmission amplifier 76 via the oscillation circuit 75 having the same configuration as described above, and the output of the transmission amplifier 76 is transmitted from the antenna 79 via the band-pass filter 78 via the changeover switch 77. The The changeover switch 77 is connected to a reception amplifier 80 to which a reception signal received by the antenna 79 and passed through the bandpass filter 78 is input. The output of the reception amplifier 80 passes through the mixer 81 and is supplied to the bandpass filter 82. The predetermined frequency passes through and is input to the amplifier 83. The reception signal amplified by the amplifier 83 is detected by the detection circuit 64 and input to the control unit 70. Even in the weak radio circuit unit 24, the reception data and the reception level of the received radio wave are input to the control unit 70.

  Further, as shown in FIG. 4, the specific low power radio circuit unit 30 of the master unit 15B has the same configuration as that of the specific low power radio circuit unit 16 of the slave unit 12, and a specific code such as its own ID is transmitted from the control unit 90. Transmission data is output and connected to an oscillator 95 including a VCO 93 and a PLL 94, and oscillation is performed at a predetermined frequency by a voltage from the control unit 90. The oscillator 95 forms a carrier wave having a predetermined transmission frequency on which a transmission / reception signal is placed. The output of the oscillator 95 is connected to the transmission amplifier 96. The output of the transmission amplifier 96 is transmitted from the antenna 99 through the band switch filter 98 via the changeover switch 97.

  The selector switch 97 is connected to a receiving amplifier 100 to which a received signal received by the antenna 99 and passed through the band-pass filter 98 is input. The output of the receiving amplifier 100 passes through the mixer 101 and is then band-passed. A predetermined frequency passes through the filter 102 and is input to the amplifier 103. The received signal amplified by the amplifier 103 is detected by the detection circuit 104 and input to the control unit 90. The received data and the reception level of the received radio wave are also input to the control unit 90 for the received signal.

  Next, the operation of the position detection wireless system of this embodiment will be described below. First, the slave unit 12 is owned by each person whose position is to be detected, and a plurality of master units 14A that detect positions in a narrow range and a plurality of master units 15B that detect positions in a wide range are fixed, and a monitoring center comprising a server or the like Are connected to the processing device 20 via a LAN. The positions of the parent device 14A and the parent device 15B are grasped by the processing device 20 such as a server.

  The outline of the position detection of the person by the handset 12 is as follows. For example, when a person moves in an event venue, park, or other event, the specific code is intermittently transmitted from the handset 12 by weak radio. And normal position detection is performed by weak wireless. For example, when close to the main unit 14A installed in a room entrance / exit or in a specific place (entering the communication range), the main unit 14A monitors the received sub unit code and its own code via the control unit 70 and the LAN. The data is sent to the processing device 20 at the center, and the position of the child device 12 is specified. In this case, the communication distance between the parent device 14A and the child device 12 is several meters or less, and is set to be detected.

  The weak radio wave signal from the slave unit 12 is intermittently transmitted, and the transmission interval is such that interference can be avoided even when a large number of slave units 12 transmit simultaneously. Each slave unit 12 monitors the transmission state of the other slave units 12 and stops transmission for a certain period of time when there is a signal.

  When the child device 12 is not in proximity to the parent device 14A, the child device 12 is called from the parent device 15B with a specific low power wireless signal. In response to a specific low-power radio signal, the received signal level is detected by several master units 15B, measured by the control unit 70, and transmitted to the processing device 20 via the LAN 22. The processing device 20 calculates the position where the child device 12 may exist from the received signal level, and specifies the location of the specific child device 12. At this time, by transmitting the transmission level data of the slave unit 12 at the same time, the calculation can be performed in consideration of the level difference at the reception location, and the detection accuracy can be improved.

  In addition, when there is a lead person, an instruction device 34 is prepared separately, and even if the location of the handset 12 is not known from the lead person, the instruction device 34 can transmit to the base unit 15B to instruct the specific handset 12 And That is, the lead person can send an instruction to the slave unit 12 that does not reach the communication by using the specific low-power wireless signal by transmitting from the instruction unit 34 possessed to the master unit 15B. Further, in addition to the position detection, an instruction by buzzer sound, voice, LED display, or the like can be issued from the parent device B14 to the child device 12.

  Here, the specific low-power radio signal is composed of a bit synchronization signal, a frame synchronization signal, a call code signal, a manufacturer-specific synchronization bit signal, a marker, a data signal, and a redundant signal based on the specific low-power format. The weak radio signal is similarly configured according to a predetermined standard.

  Furthermore, details of the movement detection of each slave unit 12 will be described by taking the movement detection of a room in a building as an example. First, as shown in FIG. 5, when a person to be detected has a handset 12 and enters a predetermined room (s1), ID and a weak radio signal are transmitted from the handset 12 by intermittent transmission all the time (s2). . Then, each of the parent devices 14A, which are two position information detectors 26 and entrance / exit detectors 27 installed in the vicinity of the entrance and slightly behind, detect the child device 12, and the ID of the child device 12 and the parent device 14A It transmits its own ID to the processing device 20 of the monitoring center (s3). Thereby, in the processing apparatus 20 of the monitoring center, since the installation locations of the two master units 14A are mapped to the layout diagram, the order of reception and the slave unit 12 communicated with weak radio signals. Whether to enter or leave the room can be determined (s4).

  Moreover, the detection of the floor movement in the building is processed as shown in FIG. First, when the person to be detected possesses the handset 12 and goes up (or gets down) the stairs (s5), the handset 12 transmits an ID and a weak radio signal by intermittent transmission (s6). And in main | base station 14A which is the floor movement detector 28 installed in the entrance of the staircase, the main | base station 14A when entering the main | base station 14A is ID of the sub-unit 12 and ID of the main | base station 14A itself. Is transmitted to the processing device 20 of the monitoring center (s7). In the processing device 20, the base unit A detects the floor movement based on the order in which the handset 12 communicates with the weak radio signal and the ID (s 8). Then, the processing device 20 at the monitoring center instructs the slave unit 12 to update the floor movement change bit by the specific low power wireless signal of the nearby master unit 15B (s9). And the subunit | mobile_unit 12 performs bit update according to the floor (s10).

  When communication is not established with the weak radio signal, the process of specifying the location of the slave unit 12 is performed as shown in FIG. First, the current location of the slave unit 12 is searched by the processing device 20 of the monitoring center (s11). And the reply request | requirement is transmitted with the specific low power radio signal with respect to the subunit | mobile_unit 12 to search from the processing apparatus 20 of a monitoring center to all the main | base stations 15B (s12). The subunit | mobile_unit 12 transmits the update bit match | combined with own transmission output level, ID, and a floor with a specific low power radio signal (s13).

  The plurality of master units 15B that have received the reply of the searching slave unit 12 transmit the received level, its own ID, the ID of the slave unit 12, the transmission level of the slave unit 12, and the update bit to the processing device 20 (s14). ). The processing device 20 specifies the presence floor by the update bit of the slave unit 12, and the location of the slave unit 12 based on the level received by the plurality of mapped master units 15B and the transmission level difference (attenuation amount) of the slave unit 14 Is specified (s15).

  Next, a case where a specific instruction is given from the instruction device 34 to the child device 12 will be described with reference to FIG. First, the instruction content is transmitted from the instruction device 34 to the parent device 15B to the ID of the child device 12 desired to be designated by the specific low power wireless signal (s16). Then, base unit 15B transmits the received content to processing device 20 (s17). The processing device 20 determines the location of the designated slave unit 12 and transmits the instruction content to the designated slave unit 12 from the nearby master unit 15B. Similarly, a reply request is also made (s18).

  If there is no reply from the designated slave unit 12, the master unit 15B transmits that there is no reply to the processing device 20 (s19). In the processing device 20, the location of the designated slave unit 12 is unknown, and the reply is sent from the master unit 15B installed on each floor to the designated slave unit 12 (s20). The slave unit 12 transmits the floor bit, the transmission level, and the ID when replying (s21). Then, the received plurality of master devices 15B transmit the information to the processing device 20 (s22). Thereby, the processing apparatus 20 specifies the place of the designated subunit | mobile_unit 12 (s23).

  In the position detection wireless system of this embodiment, the position of the handset 12 is detected by using both a weak radio wave and a specific low power radio, and the position of the short distance and the ID of the handset 12 are detected by the weak radio wave. The position detection is performed by specific low-power radio by several master units 15B, and operation instructions (LED, buzzer ringing, etc.) to the slave unit 12 are also performed by specific low-power radio signals. Thereby, the position detection of the plurality of slave units 12 at a short distance and the position detection of the slave units 12 in a wide range can be easily performed with a simple system.

  Note that the position detection wireless system of the present invention is not limited to the above-described embodiment, and the strength of communication radio waves, the type of data, and the like can be selected as appropriate.

It is a schematic block diagram of the position detection radio | wireless system of one Embodiment of this invention. It is a block diagram of the subunit | mobile_unit of the position detection radio | wireless system of this embodiment. It is a block diagram of the 1st main machine of the position detection radio system of this embodiment. It is a block diagram of the 2nd parent machine of the position detection radio system of this embodiment. It is a flowchart which detects the room movement of the subunit | mobile_unit in a building by the position detection radio | wireless system of this embodiment. It is a flowchart which detects the floor movement of a subunit | mobile_unit in a building by the position detection wireless system of this embodiment. It is a flowchart which detects the whereabouts of a subunit | mobile_unit by the specific low-power radio | wireless in the range which cannot communicate with a weak radio wave in the position detection radio | wireless system of this embodiment. It is a flowchart in the case of issuing an instruction from the pointing device to the child device in the position detection wireless system of this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Position detection wireless system 12 Slave unit 14A, 15B Base unit 16, 30, 32 Specific low power radio circuit unit 18, 24 Weak radio wave circuit unit 20 Processing device 22 LAN
26 Position information detector 27 Entry / exit detector 28 Floor movement detector 34 Indicators 40, 70, 90 Controllers 45, 55, 75, 95 Oscillator circuit

Claims (2)

  There are a slave unit and a master unit that can communicate with each other wirelessly, a plurality of the slave units and the master unit are provided, and each master unit is connected to a processing device that performs predetermined processing. Provided with both a radio circuit unit and a weak radio wave circuit unit so as to be capable of wireless communication with each of the master units, the master unit confirms the presence of the slave unit by a weak radio signal from the slave unit A specific low-power radio signal from the slave unit is communicated to at least one first master unit having a radio circuit unit and a specific low-power radio circuit unit to communicate with the slave unit by a specific low-power radio. A plurality of second master units that receive and detect the position of the slave unit, and when the weak radio wave signal from the slave unit cannot be detected by the first master unit, Communicating with a specific low power radio of the machine, a plurality of the second master unit from the slave unit Position detection radio system receiving a constant low-power radio signals, the received signal level calculated by said processing unit, characterized by being capable locate the child machine. The position detection radio | wireless system of Claim 1 provided with the specific low power radio | wireless circuit part and the instruction | indication device which gives a predetermined instruction | indication with respect to the said subunit | mobile_unit.

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