JP5805009B2 - Position detection device - Google Patents

Description

  The present invention relates to a position detection device that detects the position of a mobile device.

  A mobile device such as an RFID (Radio Frequency IDentification) tag (hereinafter referred to as a tag) having a communication range of several meters is attached to a person or an object and moved from the detection device for entrance / exit management or location management of the person or object. There is known a system for transmitting a question signal to a machine at a predetermined time interval and detecting the position of the mobile machine based on a response signal from the mobile machine to the question signal. According to such a system, while a person has a mobile device, a detection device is provided on each side of the door of the entrance of the room, and a person passes through the door based on the order in which each detection device detects the mobile device. Can be detected. At this time, since the detection areas of the detection devices on both sides of the door generally overlap each other in the vicinity of the door, the position and moving direction of the mobile device may not be accurately estimated in the overlapped area.

  Patent Document 1 describes a dynamic management system that determines a tag moving direction using two readers (detecting devices) provided so as to partially overlap tag detection areas. The dynamic management system described in Patent Document 1 negates each other's interrogation signals in areas where detection areas overlap by inverting the phase of interrogation signals sent from each reader. Then, the activity management system makes it possible to identify whether the tag exists in a range where only one of the readers can be detected or in a range where both readers can be detected in duplicate. And detecting the passing direction. However, in the dynamic management system described in Patent Document 1, it is necessary to completely match the transmission timings of the question signals from the two readers, which requires advanced synchronization control.

  Moreover, the mobile body management system described in Patent Document 2 is a mobile body management system that determines the presence or absence of movement of the mobile body between the first section and the second section, and a responder that the mobile body has, A first interrogation signal directed to the first section and a second interrogation signal directed to the second section are alternately transmitted at a predetermined period, and a response signal corresponding to the first or second interrogation signal from the responder And the presence or absence of movement between the first section and the second section by the moving body according to the detection order of the response signal to the first interrogation signal and the response signal to the second interrogation signal by the interrogator And a management device for determining. Here, the transponder receives the first or second interrogation signal transmitted from the interrogator, transmits / receives a response signal to the received interrogation signal, and the transceiving unit transmits the first or second interrogation signal. When any one of the interrogation signals is received, a response signal to the received interrogation signal is transmitted, and while the interrogation signal is received at a predetermined period, the other interrogation signal of the first or second interrogation signal is received. And a control unit that controls the transmission / reception unit so as not to transmit a response signal to the question signal. Therefore, even when the transmission ranges of the first and second interrogation signals overlap at the boundary between the first and second sections, the responder has moved from the first section to the second section or the second section It can be judged more accurately than the movement management system described in Patent Document 1 whether the vehicle has moved to the first section.

JP 2007-299052 A JP 2009-288861 A

  However, according to the mobile management system described in Patent Document 2, for example, when the responder moves from the first section to the second section, the responder receives either one of the first question signals. Is received, a response signal for the received first interrogation signal is transmitted, and no response signal is transmitted for the second interrogation signal while the first interrogation signal is received in a predetermined cycle. Therefore, when the reachable range of the first interrogation signal and the reachable range of the second interrogative signal overlap in an area including the boundary between the first and second sections, the responder only has the first interrogative signal in the area. Respond to. Therefore, when the position of the responder is estimated based on the response signal from the responder, even if the responder has actually moved from the first section to the second section, the responder is still in the first section. Has been mistakenly estimated to exist.

  As described above, conventionally, when the position of a mobile device is detected using a plurality of detection devices, the position of the mobile device cannot be accurately detected in a region where the detection regions of the detection devices overlap. An object of the present invention is to solve the above-described problems and provide a position detection device that can accurately detect the position of a mobile device as compared with the prior art.

  The position detection device according to the present invention includes a first detection device that wirelessly transmits a first detection signal and a first position determination signal to a predetermined first detection region, a second detection signal, and a second detection signal. And a second detection device that wirelessly transmits the position determination signal to a predetermined second detection region, and the first and second detection signals are alternately transmitted, and the first detection signal is followed by A detection control device that controls the first and second detection devices so as to transmit the second position determination signal and transmit the first position determination signal subsequent to the second detection signal; When the first detection signal is received, a first response signal indicating whether or not a second position determination signal following the received first detection signal has been received is wirelessly transmitted, and the second detection signal is transmitted. Whether or not the first position determination signal following the received second detection signal is received. The to the second response signal, characterized in that a mobile station that wirelessly transmits.

  According to the position detection device of the present invention, the first and second detection signals are alternately transmitted, and the second position determination signal is transmitted following the first detection signal. Subsequently, when the first detection signal is received and the detection control device that controls the first and second detection devices so as to transmit the first position determination signal, the first detection signal following the received first detection signal. When a second response signal is wirelessly transmitted and a second detection signal is received, the first position determination signal subsequent to the received second detection signal is received. Mobile station for wirelessly transmitting the second response signal indicating whether or not the first detection area of the first detection device overlaps with the second detection area of the second detection device. Even if the mobile device receives only the first or second response signal from the mobile device, the mobile device detects the first and second detection signals. It can detect the presence in a region regions overlap.

It is a block diagram which shows the structure of the position detection apparatus which concerns on Embodiment 1 of this invention. It is a timing chart which shows operation | movement of the position detection apparatus of FIG. It is a timing chart which shows the operation | movement which concerns on the comparative example of the position detection apparatus of FIG. It is a timing chart which shows the operation | movement which concerns on the modification of the position detection apparatus of FIG. It is a block diagram which shows the structure of the position detection apparatus which concerns on Embodiment 2 of this invention. It is a top view which shows the arrangement | positioning method of the antennas 11a-15a of FIG. 5, and the position determination signals L11-L15 received in each area | region. It is a timing chart which shows operation | movement of the position detection apparatus of FIG. It is a top view which shows another arrangement | positioning method of the antennas 11a-15a of FIG. It is a top view which shows the position determination signals L11-L15 received in each area | region when the arrangement | positioning method of FIG. 8 is used. It is a timing chart which shows operation | movement of the position detection apparatus of FIG. 5 when the antennas 11a-15a are arrange | positioned as shown in FIG. It is a block diagram which shows the structure of the position detection apparatus which concerns on Embodiment 3 of this invention. It is a top view which shows the arrangement | positioning method of the antennas 11a-17a of FIG. 11, and the position determination signals L11-L17 received in each area | region. 12 is a timing chart illustrating the operation of the position detection device in FIG. 11. 12 is a timing chart illustrating an operation according to a modification of the position detection device in FIG. 11. It is a block diagram which shows the structure of the position detection apparatus which concerns on Embodiment 4 of this invention. It is a block diagram which shows the structure of the position detection apparatus which concerns on Embodiment 5 of this invention. It is a top view which shows the arrangement method of the antennas 11a and 12a of FIG. 16, and areas A, B, and C. It is a block diagram which shows the structure of the position detection apparatus which concerns on Embodiment 6 of this invention. It is a top view which shows the arrangement | positioning method of antenna 11a, 12a of FIG. 18, and area A, B, C, As, Bs, Cs. It is a flowchart which shows the detection control process performed by the detection control apparatus 2B of FIG. FIG. 20 is a timing chart showing the operation of the position detection device of FIG. 18 when the mobile device 1 moves along the path P3 of FIG. It is a block diagram which shows the structure of the position detection apparatus which concerns on Embodiment 7 of this invention. It is a block diagram which shows the structure of the position detection apparatus which has the antipass back function based on Embodiment 8 of this invention. It is a flowchart which shows the 1st part of the entrance / exit management process performed by the entrance / exit management apparatus 9 of FIG. It is a flowchart which shows the 2nd part of the entrance / exit management process performed by the entrance / exit management apparatus 9 of FIG.

  Hereinafter, embodiments according to the present invention will be described with reference to the drawings. In addition, in each following embodiment, the same code | symbol is attached | subjected about the same component.

Embodiment 1 FIG.
FIG. 1 is a block diagram showing the configuration of the position detection device according to Embodiment 1 of the present invention, and FIG. 2 is a timing chart showing the operation of the position detection device of FIG. In FIG. 1, the position detection device according to the present embodiment includes a mobile device 1, a detection control device 2, detection devices 11 and 12, and a wireless reception device 3. The detection device 11 includes an antenna 11a and a wireless transmission circuit 21, and the detection device 12 includes an antenna 12a and a wireless transmission circuit 22. Furthermore, the mobile device 1 includes an antenna 1a, and the wireless reception device 3 includes an antenna 3a and a wireless reception circuit 4.

  In FIG. 1, the position detection device according to the present embodiment is used in an entrance / exit management system that manages entrance / exit of a person or an article between two sections 201, 202 separated by a door 300 such as an automatic door or a gate. . In FIG. 1, a mobile device 1 is, for example, an RFID tag attached to a person or an article that is managed to enter and leave the room. In addition, in order to limit the travel route of the mobile device 1 between the indoor compartment 201 and the outdoor compartment 202 to one, for a structure 301 such as a wall that separates the compartment 201 and the compartment 202, A door 300 such as an automatic door or a gate is provided. Further, in order to detect the movement of the mobile device 1 between the sections 201 and 202, the detection device 11 is installed in the vicinity of the door 300 in the section 201, while the detection device 12 is installed in the door 300 in the section 202. It is installed in the vicinity. More specifically, in order to reliably detect the mobile device 1 that crosses the door 300, the antenna 11a and the antenna 12a have a radio wave arrival range from the antenna 11a (hereinafter, referred to as a detection region 110 of the detection device 11) and. The reach of radio waves from the antenna 12a (hereinafter referred to as the detection area 120 of the detection device 12) is installed so as to include the door 300. In general, the detection areas 110 and 120 change under the influence of the environment around the radio wave propagation path such as the structures in the sections 201 and 202 and components in the air, but in FIG. Show. Further, as shown in FIG. 1, since the detection areas 110 and 120 both include the door 300, the detection areas 110 and 120 overlap in the area C including the door 300. Hereinafter, an area obtained by removing area C from detection area 110 is referred to as area A, and an area obtained by removing area C from detection area 120 is referred to as area B. In FIG. 1, the antenna 3 a is installed at a position where radio waves can be received from the antenna 1 a of the mobile device 1 regardless of whether the mobile device 1 is present in any of the detection areas 110 and 120.

In FIG. 1, the detection control device 2 controls the wireless transmission circuit 21 of the detection device 11 so as to wirelessly transmit the detection signal D11 and the position determination signal L11, while the detection signal D12 and the position determination are performed, as will be described in detail later. The wireless transmission circuit 22 of the detection device 12 is controlled so as to wirelessly transmit the signal L12. Under the control of the detection control device 2, the wireless transmission circuit 21 modulates a carrier wave having a predetermined frequency according to the detection signal D11 and the position determination signal L11, and wirelessly transmits the modulated wireless signal using the antenna 11a. Further, under the control of the detection control device 2, the wireless transmission circuit 22 modulates a carrier wave having a predetermined frequency in accordance with the detection signal D12 and the position determination signal L12, and wirelessly transmits the modulated wireless signal using the antenna 12a. To do. Note that the frequency of the carrier wave used in the wireless transmission circuits 21 and 22 is set to 130 kHz, for example, so as to be the same.

  In FIG. 1, the mobile device 1 performs communication by a half-duplex communication method using the antenna 1a. As will be described in detail later, the mobile device 1 wirelessly transmits a wireless signal including the response signal R11 in response to the detection signal D11 from the detection device 11 when present in the detection region 110, while in the detection region 120. When present, the wireless signal including the response signal R12 is wirelessly transmitted in response to the detection signal D12 from the detection device 12. The wireless reception circuit 4 demodulates the wireless signal wirelessly received using the antenna 3a into response signals R11 and R12 and outputs the response signals to the detection control device 2. Furthermore, the detection control device 2 detects the presence area of the mobile device 1 based on the combination of the position determination signals L11 and L12 included in the response signals R11 and R12, and outputs an area signal S2 representing the detected presence area. .

  Next, a method for controlling the detection devices 11 and 12 by the detection control device 2 will be described with reference to FIG. As shown in FIG. 2, the detection control device 2 controls the detection devices 11 and 12 so that the detection signals D11 and D12 are alternately transmitted by radio. Further, the detection control device 2 detects the wireless transmission of the position determination signal L12 following the position determination signal L11 after controlling the detection device 11 to wirelessly transmit the position determination signal L11 following the detection signal D11. The device 12 is controlled. Furthermore, the detection control device 2 controls the detection device 12 to wirelessly transmit the position determination signal L12 following the detection signal D12, and then wirelessly transmits the position determination signal L11 following the position determination signal L12. The detection device 11 is controlled. Accordingly, the position determination signals L11 and L12 are wirelessly transmitted following the detection signal D11, and the position determination signal L12 and the position determination signal L11 are wirelessly transmitted following the detection signal D12.

  In FIG. 2, detection signals D11 and D12 are used to confirm, for example, a start bit for notifying the mobile device 1 of the start of communication, data representing the previous communication status, encryption key data used for communication, and communication contents. Information necessary for communication with the mobile device 1 such as check information such as CRC (Cyclic Redundancy Check) and the like, and has a size of several tens of bytes or more. On the other hand, the position determination signals L11 and L12 include predetermined data for identifying the detection devices 11 and 12 that are transmission sources of the position determination signals L11 and L12, respectively, and are sufficiently smaller than the sizes of the detection signals D11 and D12, for example. It has a size of several bits. Therefore, the communication time when the position determination signal L11 is transmitted following the detection signal D11 is substantially the same as the communication time when only the detection signal D11 is transmitted. Similarly, the communication time when the position determination signal L12 is transmitted following the detection signal D12 is substantially the same as the communication time when only the detection signal D12 is transmitted.

  In FIG. 2, when the mobile device 1 receives the detection signal D11 and the position determination signal L11, the mobile device 1 waits for the position determination signal L12 for a predetermined waiting time. When the position determination signal L12 is received, the response signal R11 including the data E11 indicating that the detection signal D11 has been received and the position determination signals L11 and L12 is transmitted, but the position determination signal L12 is not received. If it is detected, a response signal R11 including data E11 indicating that the detection signal D11 has been received and a position determination signal L11 is transmitted. In addition, when the mobile device 1 receives the detection signal D12 and the position determination signal L12, the mobile device 1 waits for the position determination signal L11 for a predetermined waiting time. When the position determination signal L11 is received, the response signal R12 including the data E12 indicating that the detection signal D12 has been received and the position determination signals L12 and L11 is transmitted, but the position determination signal L11 is not received. If it is detected, a response signal R12 including data E12 indicating that the detection signal D12 has been received and a position determination signal L12 is transmitted. The standby time described above is set to be longer than the transmission time of the position determination signals L11 and L12 and shorter than the time until the next detection signal D11 or D12 is received. The data E11 includes, for example, predetermined data for identifying the detection device 11 that is the transmission source of the detection signal D11, and the data E12 is, for example, a predetermined data for identifying the detection device 12 that is the transmission source of the detection signal D12. Contains data.

  In FIG. 2, when the mobile device 1 exists in the area A, since the area A is within the detection region 110 and outside the detection region 120, the mobile device 1 detects the detection signal D <b> 11 and the position determination signal from the detection device 11. L11 can be received, but the detection signal D12 and the position determination signal L12 from the detection device 12 cannot be received. Therefore, as shown in FIG. 2, the mobile device 1 includes data E11 indicating that the detection signal D11 has been received and the position determination signal L11 in response to the detection signal D11 when present in the area A. Then, the response signal R11 not including the position determination signal L12 is wirelessly transmitted.

  In FIG. 2, when the mobile device 1 exists in the area B, since the area B is outside the detection region 110 and within the detection region 120, the mobile device 1 detects the detection signal D <b> 11 and the position from the detection device 11. Although the determination signal L11 cannot be received, the detection signal D12 and the position determination signal L12 from the detection device 12 can be received. Therefore, as shown in FIG. 2, when the mobile device 1 exists in the area B, the mobile device 1 includes data E12 indicating that the detection signal D12 has been received in response to the detection signal D12, and a position determination signal L12. Then, the response signal R12 not including the position determination signal L11 is wirelessly transmitted.

  Further, in FIG. 2, when the mobile device 1 exists in the area C, the area C is in the detection region 110 and in the detection region 120, so the mobile device 1 detects the detection signal D <b> 11 from the detection device 11 The position determination signal L11, the detection signal D12 and the position determination signal L12 from the detection device 12 can be received. Therefore, as shown in FIG. 2, when the mobile device 1 exists in the area C, in response to the detection signal D11, the mobile device 1 receives data E11 indicating that the detection signal D11 has been received, and position determination signals L11 and L12. The response signal R11 including is wirelessly transmitted. In response to the detection signal D12, a response signal R12 including data E12 indicating that the detection signal D12 has been received and position determination signals L11 and L12 is wirelessly transmitted.

  Therefore, the response signal R11 indicates whether or not the mobile device 1 has received the position determination signals L11 and L12 following the detection signal D11, and the response signal R12 moves the position determination signals L12 and L11 following the detection signal D12. It represents whether each machine 1 has received. Specifically, the combination of the position determination signals included in the response signals R11 and R12 varies depending on the area where the mobile device 1 is present. Based on the combination of the position determination signals included in the response signals R11 and R12 received by the wireless reception device 3, the detection control device 2 indicates in which of the areas A, B, and C the mobile device 1 is present. And an area signal S2 representing the detected presence area is output.

  According to the present embodiment, the detection control device 2 can detect the position of the mobile device 1 based on one response signal R11 or R12. For example, in FIG. 2, the shortest detection time Td necessary for the detection control device 2 to detect the position of the mobile device 1 is the response signal R11 to the detection signal D11 or D12 from the transmission start timing of the detection signal D11 or D12. Or the time until the transmission end timing of R12. In addition, the longest time required for receiving all signals necessary for specifying the position of the mobile device 1 in the mobile device 1 (hereinafter referred to as position specifying time Tc) is the transmission of the detection signal D11 or D12. This is the time from the start timing to the transmission end timing of the position determination signals L11 and L12. Here, for example, when the carrier frequency used for transmitting the detection signals D11 and D12 is 130 kHz and the size of the detection signals D11 and D12 is several tens of bytes, the transmission time of the detection signals D11 and D12 is about 100 milliseconds. It is. At this time, the transmission time of the two position determination signals L11 and L12 is 5 milliseconds, and the time from the transmission end timing of the two position determination signals L11 and L12 to the transmission end timing of the response signal R11 or R12 is 100 milliseconds. , The detection time Td is about 205 milliseconds, and the position specifying time Tc is 105 milliseconds. For this reason, for example, when the moving speed of the mobile device 1 is 1 m / second, which is about the same as the moving speed of a person, the mobile device 1 moves only about 10 cm during the position specifying time Tc.

  FIG. 3 is a timing chart showing an operation according to a comparative example of the position detection device of FIG. In FIG. 3, the detection signals D11 and D12 are transmitted in the same manner as in FIG. 2, but the position determination signals L11 and L12 are not transmitted. The response signal R11 includes data E11 indicating that the detection signal D11 has been received, and the response signal R12 includes data E12 indicating that the detection signal D12 has been received. In the comparative example, the detection control device 2 determines that the mobile device 1 exists in the area C when the response signals R11 and R12 are continuously received. For this reason, the shortest detection time Td necessary for the detection control device 2 to detect the position of the mobile device 1 is determined from the transmission start timing of one of the detection signals D11 or D12 to the other of the detection signals D11 or D12. Is the time until the transmission end timing of the response signal R11 or R12. Further, the above-described position specifying time Tc is the time from the transmission start timing of the detection signal D11 to the transmission end timing of the detection signal D12. As shown in FIG. 3, in the comparative example, the position specifying time Tc includes a response signal R11 or R12. Here, for example, when the carrier frequency used for transmitting the detection signals D11 and D12 is 130 kHz and the size of the detection signals D11 and D12 is several tens of bytes, the transmission time of the detection signals D11 and D12 is about 100 milliseconds. It is. At this time, when the time from the transmission end timing of the detection signal D11 or D12 to the transmission end timing of the response signal R11 or R12 is 100 milliseconds, the detection time Td is (100 milliseconds + 100 milliseconds) × 2 = 400. The positioning time Tc is 100 milliseconds + 100 milliseconds + 100 milliseconds = 300 milliseconds or more. For this reason, for example, when the moving speed of the mobile device 1 is 1 m / second, which is about the same as the moving speed of a person, the mobile device 1 moves 30 cm during 300 milliseconds. A position estimation error for one person occurs. That is, according to the present embodiment, the position specifying time Tc does not include the response signals R11 and R12 (see FIG. 2), so that the position of the mobile device 1 can be detected with higher accuracy than in the comparative example. I understand. Further, according to the present embodiment, after the mobile device 1 receives the detection signal D11 or D12, the position specifying time Tc does not change even if the period until the response signal R11 or R12 is transmitted becomes long, and the comparative example Compared to the above, the position of the mobile device 1 can be detected with high accuracy.

  In the case of the operation according to the comparative example of FIG. 2, when the mobile device 1 passes through the area C relatively slowly as in the first movement pattern, the wireless receiver 3 causes the mobile device 1 to move within the area C. Since the response signals R11 and R12 can be received while the mobile device 1 is in the area C, it can be detected that the mobile device 1 is in the area C. However, when the mobile device 1 passes through the area C relatively quickly as in the second or third movement pattern, the wireless reception device 3 determines that the response signals R11 and R12 while the mobile device 1 is in the area C. Thus, even if the mobile device 1 is in the area C, it is erroneously detected that it is in the area A or B. On the other hand, according to the present embodiment, the position of the mobile device 1 can be detected more accurately than the conventional technology regardless of the moving speed of the mobile device 1.

As described above, the position detection device according to the present embodiment is
(1) a detection device 11 that wirelessly transmits a detection signal D11 and a position determination signal L11 to the detection region 110;
(2) the detection device 12 that wirelessly transmits the detection signal D12 and the position determination signal L12 to the detection region 120;
(3) The detection signals D11 and D12 are alternately transmitted, the position determination signals L11 and L12 are sequentially transmitted following the detection signal D11, and the position determination signals L12 and L11 are sequentially transmitted following the detection signal D12. A detection control device 2 for controlling the detection devices 11 and 12;
(4) When the detection signal D11 is received, the response signal R11 indicating whether or not the position determination signals L11 and L12 following the received detection signal D11 are respectively received is wirelessly transmitted, and when the detection signal D12 is received, the reception The mobile device 1 wirelessly transmits a response signal R12 indicating whether or not the position determination signals L12 and L11 following the detected signal D12 have been received.

  Therefore, according to the present embodiment, the position of the mobile device 1 is determined by one communication between the detection device 11 or 12 and the mobile device 1 without substantially extending the communication time of the detection signals D11 and D12. Can be determined. Therefore, the position of the mobile device 1 can be detected more accurately than in the prior art. In particular, regardless of whether the mobile device 1 is moving or stationary, it is possible to accurately identify the area A, B, and C in FIG.

  In this embodiment, the detection signal D11, the position determination signal L11, and the position determination signal L12 are transmitted in this order, and the detection signal D12, the position determination signal L12, and the position determination signal L11 are transmitted in this order. The transmission order is not limited to this. However, in the mobile device 1, when the signals from the detection devices 11 and 12 are divided, if the divided signals cannot be received due to communication protocol or hardware restrictions, the detection signal D11 is transmitted in the transmission order described above. And D12 and position determination signals L11 and L12 are preferably transmitted. For example, if the detection signal D11, the position determination signal L12, and the position determination signal L11 are transmitted in this order, the position determination signal L12 cannot be received when the mobile device 1 is in the area A. This is because it becomes impossible to receive.

Modification of the first embodiment.
In FIG. 1, the reception condition of the position determination signal L11 by the mobile device 1 that “the mobile device 1 exists in the detection area 110” is the same as the reception condition of the detection signal D11. Further, the reception condition of the position determination signal L12 by the mobile device 1 that “the mobile device 1 exists in the detection area 120” is the same as the reception condition of the detection signal D12. Therefore, the position determination signal L12 is transmitted without transmitting the position determination signal L11 following the detection signal D11, and the position determination signal L11 is transmitted without transmitting the position determination signal L12 following the detection signal D12. In addition, the detection devices 11 and 12 may be controlled.

  FIG. 4 is a timing chart showing an operation according to a modification of the position detection device of FIG. In FIG. 4, the detection control device 2 controls the detection devices 11 and 12 so that the detection signals D11 and D12 are alternately transmitted by radio. Furthermore, the detection control device 2 controls the detection device 11 so as to wirelessly transmit the position determination signal L11 following the detection signal D12, and detects the position determination signal L12 wirelessly after the detection signal D11. To control. Thereby, the position determination signal L12 is wirelessly transmitted following the detection signal D11, and the position determination signal L11 is wirelessly transmitted following the detection signal D12.

  In FIG. 4, when receiving the detection signal D11, the mobile device 1 waits for the position determination signal L12 for a predetermined waiting time. When the position determination signal L12 is received, the response signal R11 including the data E11 indicating the reception of the detection signal D11 and the position determination signal L12 is transmitted, but the position determination signal L12 is not received. Transmits a response signal R11 including data E11 indicating that the detection signal D11 has been received. Further, when receiving the detection signal D12, the mobile device 1 waits for the position determination signal L11 for a predetermined waiting time. When the position determination signal L11 is received, the response signal R12 including the data E12 indicating that the detection signal D12 has been received and the position determination signal L11 is transmitted, but the position determination signal L12 is not received. Transmits a response signal R12 including data E12 indicating that the detection signal D12 has been received. The standby time described above is set to be longer than the transmission time of the position determination signals L11 and L12 and shorter than the time until the next detection signal D11 or D12 is received.

  As shown in FIG. 4, when the mobile device 1 exists in the area A (see FIG. 1), the mobile device 1 responds to the detection signal D11 and receives data E11 indicating that the detection signal D11 has been received. A response signal R11 not including the included position determination signal L12 is wirelessly transmitted. When the mobile device 1 exists in the area B, the mobile device 1 responds to the detection signal D12 and includes a data E12 indicating that the detection signal D12 has been received, and does not include the position determination signal L11. Is transmitted wirelessly. Further, when the mobile device 1 is present in the area C, the mobile device 1 includes data E11 indicating that the detection signal D11 has been received in response to the detection signal D11, and a position determination signal L12. A response signal R11 not including the signal L11 is wirelessly transmitted. In response to the detection signal D12, a response signal R12 including the data E12 indicating that the detection signal D12 has been received and the position determination signal L11 and not including the position determination signal L12 is wirelessly transmitted.

  Therefore, in FIG. 4, the response signal R11 indicates whether the mobile device 1 has received the position determination signal L12 following the detection signal D11, and the response signal R12 indicates the position determination signal L11 following the detection signal D12. 1 indicates whether or not it has been received. For this reason, the response signal received changes according to the area where the mobile device 1 exists. Based on the response signal R11 or R12 received by the wireless reception device 3, the detection control device 2 detects in which of the areas A, B, and C the mobile device 1 exists, and the detected presence An area signal S2 representing the area is output. This modification has the same effect as the first embodiment.

  Although one wireless receiver 3 is installed in the first embodiment and its modification, the present invention is not limited to this, and in order to improve reception sensitivity, the vicinity of the detector 11 and the detector 12 At least one wireless receiver 3 may be installed in the vicinity.

Embodiment 2. FIG.
FIG. 5 is a block diagram showing the configuration of the position detection apparatus according to Embodiment 2 of the present invention. FIG. 6 shows the arrangement method of antennas 11a to 15a in FIG. 5 and position determination signals received in each region. It is a top view which shows L11-L15. FIG. 7 is a timing chart showing the operation of the position detection device of FIG. The position detection device according to the present embodiment further includes detection devices 13 to 15 as compared to the position detection device according to the first embodiment of FIG. 1, and the detection devices 11 to 15 are provided for structures such as buildings. The difference is that it is two-dimensionally arranged on a plane such as a ceiling, a beam, a floor, or a floor. Only differences from the first embodiment will be described below.

In FIG. 5, the position detection device according to the present embodiment includes a mobile device 1, detection devices 11 to 15, a detection control device 2, and a wireless reception device 3. Here, the detection device 13 includes an antenna 13a and a wireless transmission circuit 23, the detection device 14 includes an antenna 14a and a wireless transmission circuit 24, and the detection device 15 includes an antenna 15a and a wireless transmission circuit 25. And is configured. As will be described in detail later, the detection control device 2 controls the wireless transmission circuit 23 of the detection device 13 to wirelessly transmit the detection signal D13 and the position determination signal L13, and wirelessly transmits the detection signal D14 and the position determination signal L14. Thus, the wireless transmission circuit 24 of the detection device 14 is controlled, and the wireless transmission circuit 25 of the detection device 15 is controlled to wirelessly transmit the detection signal D15 and the position determination signal L15.

  Under the control of the detection control device 2, the wireless transmission circuit 23 modulates a carrier wave having a predetermined frequency according to the detection signal D13 and the position determination signal L13, and wirelessly transmits the modulated wireless signal using the antenna 13a. Further, under the control of the detection control device 2, the wireless transmission circuit 24 modulates a carrier wave having a predetermined frequency according to the detection signal D14 and the position determination signal L14, and wirelessly transmits the modulated wireless signal using the antenna 14a. To do. Further, under the control of the detection control device 2, the wireless transmission circuit 25 modulates a carrier wave having a predetermined frequency according to the detection signal D15 and the position determination signal L15, and wirelessly transmits the modulated wireless signal using the antenna 15a. To do. In addition, each frequency of the carrier wave used in the wireless transmission circuits 21 to 25 is set to, for example, 130 kHz so as to be the same. The position determination signals L13, L14, and L15 include predetermined data for identifying the detection devices 13, 14, and 15 that are transmission sources of the position determination signals L13, L14, and L15, respectively.

  In FIG. 6, the reach ranges 110, 120, 130, 140, and 150 of radio waves from the antennas 11a, 12a, 13a, 14a, and 15a (hereinafter, the detection areas 110, 120, and 120 of the detection devices 11, 12, 13, 14, and 15). 130, 140 and 150) are indicated by circles. In FIG. 6, antennas 12a and 13a are disposed above and below antenna 11a, and antennas 14a and 15a are disposed on the left and right sides of antenna 11a. Further, the antennas 12a, 13a, 14a, and 15a are arranged such that the detection areas 120, 130, 140, and 150 are in contact with each other and overlap only with the detection area 110. In FIG. 6, a region where the detection region 120 overlaps with the detection region 110 is referred to as a region 121, and a region obtained by removing the detection region 121 from the detection region 120 is referred to as a region 122. An area where the detection area 130 overlaps the detection area 110 is referred to as an area 131, and an area obtained by removing the detection area 131 from the detection area 130 is referred to as an area 132. Further, an area where the detection area 140 overlaps the detection area 110 is referred to as an area 141, and an area obtained by removing the detection area 141 from the detection area 140 is referred to as an area 142. Furthermore, an area where the detection area 150 overlaps the detection area 110 is referred to as an area 151, and an area obtained by removing the detection area 151 from the detection area 150 is referred to as an area 152. In FIG. 6, the antenna 3 a (not shown) is a radio wave from the antenna 1 a of the mobile device 1 regardless of the location of the mobile device 1 in the detection areas 110, 120, 130, 140, 150. It is installed in the position where can be received.

  As shown in FIG. 7, the detection control device 2 and the detection device 11 having the detection region 110 and the detection regions 120 that do not overlap each other so that the detection signal D11 and the detection signals D12 to D15 are alternately transmitted by radio. The detection devices 12 to 15 having 130, 140, and 150, respectively, are controlled. Further, the detection control device 2 controls the detection device 11 to wirelessly transmit the position determination signal L11 following the detection signal D11, and then wirelessly transmits the position determination signals L12 to L15 subsequent to the position determination signal L11. Thus, the detection devices 12 to 15 are controlled. Further, the detection control device 2 controls the detection devices 12 to 15 to wirelessly transmit the position determination signals L12 to L15 after controlling the detection devices 12 to 15 to wirelessly transmit the detection signals D12 to D15, respectively. Then, the detection device 11 is controlled so as to wirelessly transmit the position determination signal L11 following the position determination signals L12 to L15. Here, as shown in FIG. 6, the detection regions 120, 130, 140, and 150 of the detection devices 12, 13, 14, and 15 do not overlap each other, so that the wireless signals from the detection devices 12 to 15 are substantially simultaneously transmitted. Will not interfere with each other. For this reason, as shown in FIG. 7, the detection signals D12 to D15 can be transmitted substantially simultaneously, and the position determination signals L12 to L15 can be transmitted substantially simultaneously. Note that the transmission timings of the position determination signals L12 to L15 may be shifted, but the standby time of the position determination signals L12 to L15 in the mobile device 1 needs to be increased. By transmitting the detection signals that do not interfere with each other and the position determination signals that do not interfere with each other at substantially the same time, it is possible to reduce the time required for communication.

  As described above, since the position determination signals L11 to L15 are controlled to be transmitted, as shown in FIG. 6, in each of the regions 121, 131, 141, 151 where the two detection regions overlap, two overlapping detections are performed. Two position determination signals transmitted in the region are received sequentially without interference. In each of the regions 111, 122, 132, 142, and 152 where the plurality of detection regions do not overlap, one position determination signal transmitted in each region is received. Therefore, as shown in FIG. 6, the combinations of position determination signals that can be received differ depending on the position of the mobile device 1. In FIG. 5, when the mobile device 1 receives one of the detection signals D11 to D15 and the position determination signal following the detection signal, the mobile device 1 waits for the next position determination signal for a predetermined standby time. And the response signal containing the data which showed having received the detection signal mentioned above and the received position discrimination signal is transmitted. Here, the response signals corresponding to the detection signals D11, D12, D13, D14, and D15 are referred to as response signals R11, R12, R13, R14, and R15, respectively. Based on the combination of the position determination signals included in the response signals R11 to R15 received by the wireless reception device 3, the detection control device 2 detects and detects in which region in FIG. The area signal S2 representing the existing area is output.

  As described above, according to the present embodiment, since the detection devices 11 to 15 are two-dimensionally arranged on a plane, the position of the mobile device 1 can be detected even when the mobile device 1 moves on the plane. . In the present embodiment, five detection devices 11 to 15 are arranged, but the present invention is not limited to this, and six or more detection devices may be arranged so as to repeat the arrangement pattern of FIG. . Thereby, the position of the mobile device 1 moving within a wider area can be detected.

  As in the modification of the first embodiment, the position determination signals L12 to L15 are transmitted without transmitting the position determination signal L11 following the detection signal D11, and the position determination is performed following the detection signals D12 to D15. The detection devices 11 to 15 may be controlled so as to transmit the position determination signal L11 without transmitting the signals L12 to L15.

Modified example of the second embodiment.
As shown in FIG. 6, in the second embodiment, the antennas 12a, 13a, 14a, and 15a are arranged so that the detection areas 120, 130, 140, and 150 do not overlap each other. However, the present invention is not limited to this. I can't. FIG. 8 is a plan view showing another arrangement method of the antennas 11a to 15a in FIG. 5, and FIG. 9 shows position determination signals L11 to L15 received in each region when the arrangement method in FIG. 8 is used. FIG.

  In FIG. 8, each of the detection areas 120, 130, 140, and 150 overlaps with two adjacent detection areas. Specifically, the detection area 120 overlaps with the detection areas 110 and 140 in the area 123, and overlaps with the detection areas 110 and 150 in the area 124. The detection area 130 overlaps the detection areas 110 and 150 in the area 133, and overlaps the detection areas 110 and 140 in the area 134. Therefore, when the detection signals D11 to D15 and the position determination signals L11 to L15 are transmitted as shown in FIG. 7, the position determination signals L12 and L14 are transmitted substantially simultaneously. Interfere with each other and the mobile device 1 is in the region 123, the mobile device 1 cannot distinguish between the position determination signals L12 and L14. The same problem occurs in the areas 124, 133, and 134. For this reason, it is necessary to control the detection devices 11 to 15 so that the three position determination signals are received without interference in the regions 123, 124, 133, and 134.

  On the other hand, as shown in FIG. 8, the detection region 120 of the detection device 12 and the detection region 130 of the detection device 13 do not overlap each other, and the detection region 140 of the detection device 14 and the detection region 150 of the detection device 15 overlap each other. Not. For this reason, the position determination signal L12 from the detection device 12 and the position determination signal L13 from the detection device 13 do not interfere even if transmitted substantially simultaneously. Similarly, the position determination signal L14 from the detection device 14 and the position determination signal L15 from the detection device 15 do not interfere even if they are transmitted substantially simultaneously. Therefore, in this modification, in order to prevent the signals from the detection devices 12 and 13 and the signals from the detection devices 14 and 15 from interfering with each other, the transmission timing of the signals from the detection devices 12 and 13; Control is performed so that the transmission timings of the signals from the detection devices 14 and 15 do not overlap.

  FIG. 10 is a timing chart showing the operation of the position detection device of FIG. 5 when the antennas 11a to 15a are arranged as shown in FIG. In FIG. 10, the detection control device 2 controls the detection devices 11 to 15 so as to sequentially transmit the detection signal D11, the detection signals D12 and D13, and the detection signals D14 and D15. Further, the detection control device 2 controls the detection device 11 to sequentially transmit the detection signal D11 and the position determination signal L11, and then transmits the position determination signals L12 and L13 substantially simultaneously after the position determination signal L11. Thus, the detection devices 12 and 13 are controlled so that the position determination signals L14 and L15 are transmitted substantially simultaneously with the position determination signals L12 and L13. In addition, the detection control device 2 controls the detection device 12 to transmit the position determination signal L12 following the detection signal D12, and the detection device 13 to transmit the position determination signal L13 subsequent to the detection signal D13. After the control, the detection device 11 is controlled to transmit the position determination signal L11. Furthermore, the detection control device 2 controls the detection device 14 so as to transmit the position determination signal L14 following the detection signal D14, and also detects the position determination signal L15 subsequent to the detection signal D15. Then, the detection device 11 is controlled to transmit the position determination signal L11. The position determination signals L12 and L13 may be transmitted after the position determination signals L14 and L15 are transmitted.

  When the detection devices 11 to 15 are controlled as described above, as shown in FIG. 9, in each of the regions 111, 121 to 124, 131 to 134, 141, 142, 151, and 152, position determination transmitted to the region is performed. The signals are received sequentially without interference. Specifically, for example, when the mobile device 1 is in the region 123 where the three detection regions 110, 120, and 140 overlap, the mobile device 1 sequentially receives the three position determination signals L11, L12, and L14. In the area 121 where the two detection areas 110 and 120 overlap, the mobile device 1 sequentially receives the two position determination signals L11 and L12. Further, in the area 111 where the detection area 110 does not overlap with the other detection areas 120, 130, 140, 150, the mobile device 1 receives one position determination signal L11.

  As described above, even when there are regions 122, 123, 132, and 133 where three detection regions overlap, interference between a plurality of detection signals and interference between a plurality of position determination signals do not occur in the region. By controlling the detection devices 11 to 15, the presence area of the mobile device 1 can be detected based on the response signal from the mobile device 1.

  In addition, in FIG. 10, it is not necessary to transmit the position determination signals L11 to L15 transmitted immediately after the detection signals D11 to D15, similarly to the modification of the first embodiment.

Embodiment 3 FIG.
FIG. 11 is a block diagram showing the configuration of the position detection device according to Embodiment 3 of the present invention. FIG. 12 shows the arrangement method of antennas 11a to 17a in FIG. It is a top view which shows L11-L17. FIG. 13 is a timing chart showing the operation of the position detection device of FIG. The position detection device according to the present embodiment is different from the position detection device according to the second embodiment in FIG. 5 in that detection devices 16 to 17 are further provided. Only differences from the second embodiment will be described below.

  In FIG. 11, the position detection device according to the present embodiment includes a mobile device 1, detection devices 11 to 117, a detection control device 2, and a wireless reception device 3. Here, the detection device 16 includes an antenna 16a and a wireless transmission circuit 26, and the detection device 17 includes an antenna 17a and a wireless transmission circuit 27. As will be described in detail later, the detection control device 2 controls the wireless transmission circuit 26 of the detection device 16 to wirelessly transmit the detection signal D16 and the position determination signal L16, and wirelessly transmits the detection signal D17 and the position determination signal L17. Thus, the wireless transmission circuit 27 of the detection device 17 is controlled.

  Under the control of the detection control device 2, the wireless transmission circuit 26 modulates a carrier wave having a predetermined frequency according to the detection signal D16 and the position determination signal L16, and wirelessly transmits the modulated wireless signal using the antenna 16a. Further, under the control of the detection control device 2, the wireless transmission circuit 27 modulates a carrier wave having a predetermined frequency according to the detection signal D17 and the position determination signal L17, and wirelessly transmits the modulated wireless signal using the antenna 17a. To do. In addition, each frequency of the carrier wave used in the wireless transmission circuits 21 to 27 is set to, for example, 130 kHz so as to be the same. The position determination signals L16 and L17 include predetermined data for identifying the detection devices 16 and 17 that are the transmission sources of the position determination signals L16 and L17, respectively.

  In FIG. 12, the reach ranges 110, 120, 130, 140, 150, 160, 170 of the radio waves from the antennas 11a, 12a, 13a, 14a, 15a, 16a, 17a (hereinafter, the detection devices 11, 12, 13, 14, The detection areas 110, 120, 130, 140, 150, 160, and 170 of 15, 16, and 17 are indicated by circles. In FIG. 12, antennas 12a to 17a are respectively arranged in six directions around the antenna 11a. In addition, the detection regions 120, 130, 140, 150, 160, and 170 do not overlap each other within the detection region 110 of the detection device 11 and overlap each other outside the detection region 110. For this reason, in each area | region where two detection areas overlap, it controls so that the position determination signals L11-L17 may be transmitted so that the two position determination signals transmitted to the said area may not interfere with each other. In FIG. 12, the antenna 3 a (not shown) is the antenna of the mobile device 1 regardless of the location of the mobile device 1 in the detection areas 110, 120, 130, 140, 150, 160, and 170. It is installed at a position where radio waves from 1a can be received.

  Specifically, the detection devices 11 to 17 include a first group including only the detection device 11 and a second group including detection devices 12, 14 and 16 having detection regions 120, 140 and 160 that do not overlap each other. And a third group including detection devices 13, 15, and 17 having detection regions 130, 150, and 170 that do not overlap each other. At this time, as shown in FIG. 13, after the detection signal D11 from the first group is transmitted, the detection control device 2 transmits the position determination signal L11 from the first group, and from the second group. The position determination signals L12, L14, and L16 are transmitted substantially simultaneously, and the position determination signals L13, L15, and L17 from the third group are transmitted substantially simultaneously. Next, after the detection signals D12, D14, D16 from the second group are transmitted substantially simultaneously, the detection control device 2 receives the position determination signals L12, L14, L16 from the second group substantially. The detection devices 11 to 17 are controlled so that the position determination signals L13, L15, and L17 from the third group are transmitted substantially simultaneously and the position determination signal L11 from the first group is transmitted. . Furthermore, after the detection signals D13, D15, D17 from the third group are transmitted substantially simultaneously, the detection control device 2 receives the position determination signals L13, L15, L17 from the third group substantially simultaneously. The detection devices 11 to 17 are controlled so that the position determination signal L11 from the first group is transmitted and the position determination signals L12, L14, and L16 from the second group are transmitted substantially simultaneously. The detection control device 2 repeatedly executes the operation described above.

  As described above, since the position determination signals L11 to L17 are controlled to be transmitted, as shown in FIG. 12, in each region where two detection regions overlap, the two transmitted in two overlapping detection regions are transmitted. Two position determination signals are sequentially received without interference. In each region where a plurality of detection regions do not overlap, one position determination signal transmitted in each region is received. Therefore, as shown in FIG. 12, the combinations of position determination signals that can be received differ depending on the position of the mobile device 1. In FIG. 11, when the mobile device 1 receives one of the detection signals D11 to D17 and the position determination signal following the detection signal, the mobile device 1 waits for the next position determination signal for a predetermined standby time. And the response signal containing the data which showed having received the detection signal mentioned above and the received position discrimination signal is transmitted. Here, the response signals corresponding to the detection signals D11, D12, D13, D14, D15, D16, and D17 are referred to as response signals R11, R12, R13, R14, R15, R16, and R17, respectively. Based on the combination of the position determination signals included in the response signals R11 to R17 received by the wireless reception device 3, the detection control device 2 detects and detects in which region in FIG. 12 the mobile device 1 exists. The area signal S2 representing the existing area is output.

  As described above, according to the present embodiment, the transmission timings of the detection signals from the plurality of detection devices having the detection regions that overlap each other do not overlap and the plurality of detection devices that have the detection regions that overlap each other. Since the control is performed so that the transmission timings of the position determination signals from each other do not overlap, the detection devices 11 to 17 can be arranged in a complicated shape such as a hexagon. Although seven detection devices 11 to 17 are arranged in the present embodiment, the present invention is not limited to this, and eight or more detection devices may be arranged so as to repeat the arrangement pattern of FIG. . Thereby, the position of the mobile device 1 moving within a wider area can be detected.

  In FIG. 13, as in the modification of the first embodiment, the position determination signals L11 to L17 transmitted immediately after the detection signals D11 to D17 do not have to be transmitted.

Modified example of the third embodiment.
In FIG. 12, the position determination signal L <b> 11 from the antenna 11 a can be received only within the detection area 110. In addition, the detection areas 120, 130, 140, 150, 160, and 170 overlap each other outside the detection area 110, but do not overlap each other within the detection area 110. Therefore, when the mobile device 1 receives the detection signal D11, the mobile device 1 exists in the detection region 110 of the detection device 11, and therefore, even if interference of the position determination signal occurs outside the detection region 110, there is no problem. Absent.

  FIG. 14 is a timing chart showing an operation according to a modified example of the position detection device of FIG. Compared with the operation of FIG. 13, the operation of FIG. 14 controls the detection device 11 to sequentially transmit the detection signal D11 and the position determination signal L11, and then substantially transmits the position determination signals L12 to L17. The only difference is that the detection devices 12 to 17 are controlled. According to this modification, the mobile device 1 can receive response signals R11 to R17 similar to those in the third embodiment. This modification has the same effect as the third embodiment.

  In FIG. 14, similarly to the modification of the first embodiment, the position determination signals L11 to L17 transmitted immediately after the detection signals D11 to D17 may not be transmitted.

Embodiment 4 FIG.
In the second embodiment, five detection devices 11 to 15 are connected to one detection control device 2, and in the third embodiment, seven detection devices 11 to 17 are connected to one detection control device 2. A plurality of detection devices are arranged on a plane. However, when several tens to several hundreds of detection devices are arranged, the same number of wires as the detection devices are required for the detection control device 2, which is not realistic.

  FIG. 15 is a block diagram showing a configuration of a position detection device according to Embodiment 4 of the present invention. The position detection device according to the present embodiment includes a detection control device 2A, detection devices 11 and 12, and wireless reception devices 3A and 3B. Further, the detection control device 2A includes detection control circuits 10A and 10B, a synchronization signal generator 5, and a position determination device 6. Here, the detection devices 11 and 12 are configured in the same manner as the detection devices 11 and 12 according to the first embodiment, and thus description thereof is omitted. Further, since radio receiving apparatuses 3A and 3B are configured in the same manner as radio receiving apparatus 3 according to Embodiment 1, description thereof is omitted. Note that each of the antennas 3a of the wireless receiving devices 3A and 3B is such that the radio wave from the antenna 1a of the mobile device 1 is transmitted to the antenna 3a of the wireless receiving device 3A, regardless of whether the mobile device 1 exists in the detection area 110 or 120. And at least one of the antennas 3a of the wireless reception device 3B. Accordingly, the response signals R11 and R12 from the mobile device 1 are received by at least one of the radio reception devices 3A and 3B.

  In FIG. 15, the synchronization signal generator 5 generates a pulse waveform or a clock signal having a predetermined period, and outputs it to the detection control circuits 10A and 10B as the synchronization signal S5. Further, the detection control circuits 10A and 10B respectively control the detection devices 11 and 12 according to the synchronization signal S5 so that the detection signals D11 and D12 and the position determination signals L11 and L12 are transmitted as in the first embodiment. Specifically, the detection control circuit 10A controls the detection device 11 to transmit the detection signal D11 and the position determination signal L11 according to the synchronization signal S5, and the detection control circuit 10B detects the detection device according to the synchronization signal S5. 12 is controlled to transmit the detection signal D12 and the position determination signal L12.

  In FIG. 15, the detection control circuit 10A outputs the response signal R11 or R12 demodulated by the wireless reception circuit 4 of the wireless reception device 3A to the position determination device 6, while the detection control circuit 10B includes the wireless reception device 3 The response signal R11 or R12 demodulated by the wireless reception circuit 4 is output to the position determination device 6. Here, the response signal received by the detection control circuit 10A may be different from the response signal received by the detection control circuit 10B. The position determination device 6 detects an area where the mobile device 1 exists based on the combination of the position determination signals L11 and L12 included in the response signals R11 and R12 from the detection control circuits 10A and 10B, and detects the detected area. An area signal S2A is output.

  As described above, according to the present embodiment, the synchronization signal S5 is output to the two detection control circuits 10A and 10B and the detection control circuits 10A and 10 are operated in synchronization with each other. Even if the signal increases, the detection signals D11 and D12 and the position determination signals L11 and L12 can be controlled to be transmitted in the same order as in the first embodiment. Furthermore, since the area where the mobile device 1 is present is detected based on the combination of the position determination signals L11 and L12 included in the response signals R11 and R12 from the detection control circuits 10A and 10, several tens to several hundreds A large-scale position detection device including the detection device can be realized.

  In the present embodiment, one detection device 11 is connected to one detection control circuit 10A. However, the present invention is not limited to this, and the detection control device 2 according to the second or third embodiment includes a plurality of detection devices. A plurality of detection devices 11 may be connected to one detection control circuit 10A as if the devices were connected. Moreover, although the detection control apparatus 2A according to the present embodiment includes the two detection control circuits 10A and 10, the present invention is not limited to this, and may include three or more detection control circuits. In this case, the synchronization signal S5 may be output to a plurality of detection control circuits.

Embodiment 5 FIG.
FIG. 16 is a block diagram showing the configuration of the position detection device according to Embodiment 5 of the present invention, and FIG. 17 shows the arrangement method of antennas 11a and 12a and areas A, B, and C in FIG. It is a top view. The position detection device according to the present embodiment is different from the position detection device of FIG. 1 according to the first embodiment in that it further includes a movement direction determination device 8 including a memory 8m. Only differences from the first embodiment will be described below.

  In FIG. 16, the detection control device 2 outputs an area signal S <b> 2 indicating the area where the mobile device 1 exists to the movement direction determination device 8. The moving direction discriminating device 8 stores the data of the area where the mobile device 1 is included in the area signal S2 from the detection control device 2 in the memory 8m. Then, the moving direction discriminating device 8 discriminates the moving direction of the mobile device 1 on the basis of the data history of the existing area of the mobile device 1 stored in the memory 8m, and outputs a moving direction signal S8 representing the discrimination result. . For example, if the presence area of the mobile device 1 changes in the order of area B, area C, and area A in FIG. 17, the moving direction determination device 8 determines that the mobile device 1 has moved from area B to area A, and A movement direction signal S8 representing the determination result is output. In this case, the mobile device 1 has moved from the top to the bottom in FIG. Therefore, for example, in FIG. 17, when the section 202 is outside the structure 301 and the section 201 is inside the structure 301, it is indicated that the mobile device 1 has entered the building partitioned by the structure 301. A determination can be made based on the signal S8. For this reason, the position detection device according to the present embodiment is useful as a position detection device for an entrance / exit management device.

  However, when the mobile device 1 passes through the door 300 substantially crossing only the area C along the movement path P2 as shown in FIG. 17, it is difficult to determine entry / exit based on the movement direction signal S8 described above. However, the moving direction determination device 8 can output a moving direction signal S8 indicating that it is difficult to determine the moving direction of the mobile device 1. On the other hand, when the detection control device 2 performs the operation according to the comparative example described above, it cannot be determined that the mobile device 1 is in the area C, and it is determined that the mobile device 1 exists in the area A or B. For this reason, when the moving direction of the mobile device 1 is determined based on the area signal S2 from the detection control device 2 that performs the operation according to the comparative example, the moving direction determination device 8 erroneously determines the moving direction of the mobile device 1, Moreover, it cannot be identified that the judgment may be wrong.

Embodiment 6 FIG.
18 is a block diagram showing the configuration of the position detection apparatus according to the sixth embodiment of the present invention. FIG. 19 shows the arrangement method of the antennas 11a and 12a and the areas A, B, C, As, and FIG. It is a top view which shows Bs and Cs. FIG. 20 is a flowchart showing detection control processing executed by the detection control device 2B of FIG. 18, the position detection device according to the present embodiment is different from the position detection device of FIG. 1 according to the first embodiment in that a detection control device 2B is provided instead of the detection control device 2. Hereinafter, differences from the first embodiment will be described.

  In each of the above embodiments, as shown in FIG. 19, when the mobile device 1 passes through the door 300 substantially crossing only the area C along the movement path P3, the detection control device 2 determines that the mobile device 1 Although it can be detected that it exists in the area C, as described in the fifth embodiment, based on the area signal S2 from the detection control device 2, it was not possible to detect that the mobile device 1 crossed the door 300.

  In FIG. 18, the detection control device 2 </ b> B includes an output adjustment device 7. Similarly to the detection control device 2 according to the first embodiment, the detection control device 2B controls the detection devices 11 and 12 to transmit the detection signals D11 and D12 and the position determination signals L11 and L12, and outputs an adjustment device. 7, the transmission output levels (hereinafter referred to as output levels) of the signals D11, D12, L11, and L12 from the detection devices 11 and 12 are set to the first level or the second level lower than the first level. Switch to. Here, as shown in FIG. 19, when the output level is switched to the first level, the detection region of the detection device 11 becomes the detection region 110, and the detection region of the detection device 12 becomes the detection region 120. When the output level is switched to the second level, the detection area of the detection device 11 becomes a detection area 110s narrower than the detection area 110, and the detection area of the detection device 12 becomes a detection area 120s narrower than the detection area 120. Become.

  As shown in FIG. 19, the detection areas 110s and 120s are included in the area C. Furthermore, the detection areas 110 s and 120 s overlap in the area Cs including the door 300. Hereinafter, an area obtained by removing the area Cs from the detection area 110s is referred to as an area As, and an area obtained by removing the area Cs from the detection area 120s is referred to as an area Bs. In FIG. 18, the detection control device 2B moves based on the combination of the position determination signals included in the response signals R11 and R12 demodulated by the wireless reception circuit 4, similarly to the detection control device 2 according to the first embodiment. The presence area of the machine 1 is detected, and an area signal S2B representing the detected area is output. When the output control level is set to the first level, the detection control device 2B determines that the mobile device 1 is outside the area A, B, C or the area A, B, C, and the output level. Is set to the second level, it is determined that the mobile device 1 is outside the area As, Bs, Cs or the area As, Bs, Cs.

  Next, detection control processing executed by the detection control device 2B of FIG. 18 will be described with reference to FIG. In step S21 of FIG. 20, the detection control device 2B controls the output adjustment device 7 so as to set the output level to the first level. Next, in step S22, the detection control device 2B causes the detection devices 11 and 12 to transmit the detection signals D11 and D12 and the position determination signals L11 and L12, similarly to the detection control device 2 according to the first embodiment. Control. Furthermore, in step S23, the detection control device 2B detects whether or not the mobile device 1 has been detected in the area C based on the combination of the position determination signals included in the response signals R11 and R12 demodulated by the wireless reception circuit 4. If YES, the process proceeds to step S24. If NO, the process of step S23 is repeated.

  In step S24 of FIG. 20, the detection control device 2B controls the output adjustment device 7 so as to set the output level to the second level. Next, in step S25, the detection control device 2B causes the detection devices 11 and 12 to transmit the detection signals D11 and D12 and the position determination signals L11 and L12, similarly to the detection control device 2 according to the first embodiment. Control. Further, in step S26, the detection control device 2B detects the mobile device 1 within the area As, Bs, or Cs based on the combination of the position determination signals included in the response signals R11 and R12 demodulated by the wireless reception circuit 4. If YES, the process of step S26 is repeatedly executed. If NO, the process returns to step S21.

  FIG. 21 is a timing chart showing the operation of the position detection device of FIG. 18 when the mobile device 1 moves along the path P3 of FIG. As shown in FIG. 21, the mobile device 1 moves along the route P3 of FIG. It moves in the order of the areas excluding Bs and Cs. In this case, since the path P3 is included in the area C, when the output level is not controlled, the mobile device 1 transmits the response signals R11 and R12 including the position determination signals L11 and L12, and the detection according to the first embodiment. The control device 2 outputs an area signal S2 representing the area C. When the detection control device 2B determines NO in steps S23 and S26 of FIG. 20, when both of the response signals R11 and R12 cannot be received over a predetermined period longer than the transmission time interval of the detection signals D11 and D12, It is determined that the presence area of the mobile device 1 is unknown.

  On the other hand, when the output level is controlled by the detection control device 2B according to the present embodiment, first, when the output level is set to the first level, the mobile device 1 moves from the area C to the areas As and Bs. If it is in the area excluding Cs and Cs, the mobile device 1 transmits a response signal R11 including position determination signals L11 and L12. Therefore, YES is determined in step S23 of FIG. 20, and the output level is set to the second level. At this time, since the mobile device 1 has not yet reached the detection area 110s and cannot receive the detection signal D11 from the detection device 11 and the detection signal D12 from the detection device 12, the existence area of the mobile device 1 is unknown. It becomes. When mobile device 1 further moves and moves in the order of area As, area Cs, and area Bs, YES is determined in step S26 of FIG. 20, and the area where mobile device 1 is present in the order of area As, area Cs, and area Bs. Is detected. In FIG. 21, there is a period described as “unknown” between the period in which the area detected by the detection control device 2B is the area Cs and the period in which the area is the area Bs. This is because the mobile device 1 cannot receive the detection signal D11 from the detection device 11, and the detection signal D12 cannot be received because the transmission period of the detection signal D12 from the detection device 12 is not included in the period. In addition, when the detection signal D12 is transmitted in the said period, it is detected that the presence area of the mobile device 1 is area Bs.

  When the mobile device 1 further moves out of the area Bs, the mobile device 1 cannot receive both the detection signals D11 and D12 from the detection devices 11 and 12, and the detection control device 2B detects the position of the mobile device 1. Can not. Therefore, NO is determined in step S26 of FIG. 20, and the output level is set to the first level. Then, it is detected that the mobile device 1 exists in the area C.

  As described above, according to the present embodiment, the transmission output levels of the detection signals D11 and D12 and the position determination signals L11 and L12 are switched between the first level and the second level. And 12 can be switched between the detection areas 110 and 120 and the detection areas 110s and 120s. For this reason, the position of the mobile device 1 can be detected with higher accuracy than in the above embodiments.

Embodiment 7 FIG.
FIG. 22 is a block diagram showing a configuration of a position detection device according to Embodiment 7 of the present invention. In FIG. 22, the position detection device according to the present embodiment is different from the position detection device of FIG. 18 according to the sixth embodiment in that it further includes a movement direction determination device 8 including a memory 8m. Only differences from the sixth embodiment will be described below. In FIG. 22, the detection control device 2 </ b> B outputs an area signal S <b> 2 </ b> B indicating the area where the mobile device 1 exists to the movement direction determination device 8. The moving direction discriminating device 8 stores the data of the area where the mobile device 1 is included in the area signal S2B from the detection control device 2B in the memory 8m. Then, the moving direction discriminating device 8 discriminates the moving direction of the mobile device 1 on the basis of the data history of the existing area of the mobile device 1 stored in the memory 8m, and outputs a moving direction signal S8 representing the discrimination result. . According to the present embodiment, for example, the presence area and the moving direction of the mobile device 1 can be determined even in the area C of FIG.

Embodiment 8 FIG.
The entrance / exit management system is desirably equipped with a function called anti-passback. With anti-passback, for example, when entering and leaving a room using contact-type RFID with a unique ID, etc., the door or gate is locked so that it cannot be entered or exited twice with the same ID. This is a function that regulates passage. For example, when the person B enters the room following the person A without performing the authentication procedure when the person A performs the authentication procedure when entering the room (joint), even if the person B tries to leave the room through the normal authentication procedure, The entrance / exit management system does not permit the passage of the door or gate because there is no authentication result when person B enters the room. For this reason, by introducing the anti-passback function, a person who has a proper authentication qualification avoids accompanying the person and performs an authentication procedure every time the person enters or leaves the room. Therefore, the entrance / exit information can be reliably acquired when the door or the gate passes. For this reason, the anti-passback function is used for accurate presence management in the workplace, for example.

  FIG. 23 is a block diagram showing a configuration of a position detection apparatus having an anti-passback function according to Embodiment 8 of the present invention. The position detection device according to the present embodiment is compared with the position detection device of FIG. 16 according to the fifth embodiment, the entrance / exit management device 9, the mobile device state storage device 91, the traffic determination device 92, and the authentication. The point which further provided the apparatus 93, the guidance apparatus 94, and the locking / unlocking apparatus 95 differs. The detection devices 11 and 12 and the wireless reception device 3 are arranged as shown in FIG. Only differences from the fifth embodiment will be described below.

  In FIG. 23, the detection control device 2 detects the presence area of the mobile device 1 based on the combination of the position determination signals L11 and L12 included in the response signals R11 and R12, and outputs an area signal S2 representing the detected presence area. The information is output to the moving direction determination device 8, the mobile device state storage device 91, and the entrance / exit management device 9. In the present embodiment, response signals R11 and R12 and area signal S2 include a unique ID assigned to mobile device 1. Further, the moving direction discriminating device 8 stores the data of the area where the mobile device 1 exists included in the area signal S2 from the detection control device 2 in the memory 8m. Then, the moving direction discriminating device 8 discriminates the moving direction of the mobile device 1 on the basis of the data history of the existing area of the mobile device 1 stored in the memory 8m, and outputs a moving direction signal S8 representing the discrimination result. . The entrance / exit management device 9 executes entrance / exit management processing shown in FIG. 24 and FIG. 25, which will be described later in detail, and a mobile device state storage device 91, a traffic determination device 92, an authentication device 93, a guidance device 94, and an application The lock device 95 is controlled.

  In FIG. 23, the mobile device state storage device 91 stores the data of the area where the mobile device 1 exists included in the area signal S2 at a predetermined timing immediately after the mobile device 1 passes through the door. Further, the traffic determination device 92 determines whether or not the current area where the mobile device 1 is present matches the area where the mobile device 1 is stored in the mobile device state storage device 91. Further, the authentication device 93 authenticates the mobile device 1. For example, the guidance device 94 notifies the owner of the mobile device 1 of traffic non-permission or the area A or the area by sending a warning sound by a buzzer, turning on a signal lamp such as an LED, or displaying a predetermined message on a display or monitor. An indeterminate notification is made to prompt movement to B. The locking / unlocking device 95 locks / unlocks the door 300.

  Next, the operation of the entrance / exit management device 9 will be described with reference to FIGS. 24 and 25 are flowcharts showing the entrance / exit management processing executed by the entrance / exit management device 9 of FIG. First, in step S31, the entrance / exit management device 9 determines whether or not the mobile device 1 has been detected in the area A, B, or C based on the area signal S2 from the detection control device 2. If YES in step S31, the process proceeds to step S32. If NO, the process of step S31 is repeated. In step S32, the entrance / exit management device 9 controls the authentication device 93 to authenticate the mobile device 1 based on the ID of the mobile device 1 included in the area signal S2, and the mobile device 1 is authenticated by the authentication device 93. Based on whether or not the mobile device 1 is permitted to pass. If YES in step S32, the process proceeds to step S33. If NO, the process proceeds to step S40. In step S40, the entrance / exit management device 9 controls the guide device 94 so as to give a traffic non-permission notice, and returns to step S31.

  In step S33, the entrance / exit management device 9 determines whether or not the mobile device 1 is detected in the area C based on the area signal S2 from the detection control device 2. If YES, the process goes to step S41. move on. At this time, since it is unknown which of the sections 201 and 202 in FIG. 1 the mobile device 1 is in, the entrance / exit management device 9 enters the area A or B with respect to the mobile device 1 in step S41. The guidance device 94 is controlled so as to make a determination impossible notification for prompting the movement, and the process returns to step S31. When NO in step S33, in step S34, the entrance / exit management device 9 detects the area where the mobile device 1 is detected, and the area where the mobile device 1 is stored in the mobile device state storage device 91 coincides. The traffic determination device 92 is controlled so as to determine whether or not, and when YES, the process proceeds to step S36, and when NO, the process proceeds to step S42. In step S <b> 34, the presence area of the mobile device 1 stored in the mobile device state storage device 91 is the presence area immediately after the mobile device 1 passes through the door 300 last time. In step S42, the entrance / exit management device 9 controls the guidance device 94 so as to give a traffic non-permission notice, and returns to step S31.

  In step S36, the entrance / exit management device 9 continues the detection operation of the mobile device 1, and based on the area signal S2 from the detection control device 2, whether or not the mobile device 1 is detected in the area A, B or C is determined. to decide. If YES in step S36, the operation of step S36 is repeatedly executed. If NO, the process proceeds to step S37. In step S37, the entrance / exit management device 9 determines whether or not the area where the mobile device 1 was last detected is the area C. If YES, the process proceeds to step S43, and if NO, the process proceeds to step S38. . In step S43, the entrance / exit management device 9 controls the guidance device 94 so as to notify the mobile device 1 that the mobile device 1 cannot move to the area A or B, and returns to step S36. In step S38, the entrance / exit management device 9 determines whether the area where the mobile device 1 was last detected matches the existing area of the mobile device 1 before unlocking stored in the mobile device state storage device 91. If YES, the process proceeds to step S44. If NO, the process proceeds to step S39.

  In step S <b> 44, the entrance / exit management device 9 determines that the mobile device 1 has not passed through the door 300, and retains the data of the existing area of the mobile device 1 stored in the mobile device state storage device 91 without updating it. Then, the process returns to step S31. In step S39, the entrance / exit management device 9 determines that the mobile device 1 has passed through the door 300, and uses the data on the area of the mobile device 1 stored in the mobile device state storage device 91 as the current movement. The data is updated to the data of the existing area of the machine 1 (the existing area after passing through the door 300), and the process returns to step S31. As described above, it is determined whether or not the mobile device 1 has actually passed through the door 300 after unlocking the door 300 by the determination processing in steps S36 to S38 in FIG.

  According to the entrance / exit management process of FIGS. 24 and 25, the mobile device 1 is permitted to pass (in the case of YES in step S32), and the mobile device 1 exists in the area A or B (in the case of NO in step S33). The door 300 is unlocked when the area where the mobile device 1 is detected coincides with the existing area immediately after the mobile device 1 has passed the previous door 300 (YES in step S34). Accordingly, it is possible to permit the passage of only the predetermined mobile device 1 that has been permitted to enter and leave the room. In addition, when the area where the mobile device 1 is detected does not coincide with the existing area immediately after the mobile device 1 passes through the previous door 300, the traffic non-permission notification is performed, so that the anti-passback function can be realized. For example, when the owner of the mobile device 1 passed through the door 300 last time, if the non-permission notice or the impossibility notification from the guidance device 94 was not followed, or if the owner of the mobile device is traveling together with another owner If NO is determined in step S34, the door 300 is not unlocked. As a result, the owner of the mobile device 1 can be guided to pass through the door 300 by a normal passage method, and reoccurrence of unauthorized passage of the door 300 can be prevented. In addition, you may perform each judgment process in step S32, S33, S34 in arbitrary orders.

As described above, the position detection device according to the present embodiment is
(1) an authentication device 93 for authenticating the mobile device 1;
(2) a locking and unlocking device 95 that locks and unlocks the door 300 included in the area C;
(3) A mobile device state storage device 91 that stores the position of the mobile device 1 detected by the detection control device 2 at a predetermined timing after the mobile device 1 passes through the door 300;
(4) a guidance device 94 for guiding the mobile device 1 to an area other than the area C;
(5) The mobile device 1 in which the mobile device 1 is authenticated by the authentication device 93, the mobile device 1 is detected in an area other than the area C, and the detected position of the mobile device 1 is stored in the mobile device state storage device 91. When the mobile device 1 is detected in the area C, the mobile device 1 is guided to an area other than the area C. When the mobile device 1 is detected in the area C, the door 300 is unlocked. An entry / exit management device 9 for controlling the guidance device 94 is provided.

Therefore, according to the position detection device according to the present embodiment, at the timing immediately after the mobile device 1 passes through the door, the data of the area where the mobile device 1 exists is stored in the mobile device state storage device 91, and the current movement The door 300 is opened when the presence area of the mobile device 1 matches the presence area of the mobile device 1 stored in the mobile device state storage device 91 and the mobile device 1 is authenticated. Further, after unlocking the door 4300, it is determined whether or not the mobile device 1 has passed through the door 300. Therefore, the anti-passback function can be realized with certainty.

  As shown in FIG. 23, the position detection device according to the present embodiment includes the detection control device 2. However, the present invention is not limited to this, and the detection control device 2A in FIG. 15 or the detection control device in FIG. 2B may be provided. When the detection control device 2B is used, it is possible to detect the position of the mobile device 1 with higher accuracy, reduce the chance of guiding the user to move to the area A or B, and improve usability.

  In each of the above embodiments, the response signals R11 to R17 include the received position determination signals L11 to L17 themselves, but the present invention is not limited to this. For example, the response signals R11 to R17 may include data representing the received position determination signals L11 to L17. That is, the response signals R11 to R17 may indicate whether or not the position determination signals L11 to L17 are received.

  As described above, according to the position detection device of the present invention, the first and second detection signals are alternately transmitted, and the second position determination signal is transmitted following the first detection signal. When the first detection signal is received and the detection control device that controls the first and second detection devices so as to transmit the first position determination signal following the second detection signal, the received first first signal is received. Wirelessly transmits a first response signal indicating whether or not a second position determination signal following the detection signal is received and receives the second detection signal, the first response signal follows the received second detection signal. And a mobile device that wirelessly transmits a second response signal indicating whether or not the position determination signal is received. Therefore, the first detection area of the first detection device and the second detection device of the second detection device are provided. Even if it overlaps with the detection area, it can move only by receiving the first or second response signal from the mobile device. There can be detected to be present within the region where the first and second detection regions overlap.

  DESCRIPTION OF SYMBOLS 1 Mobile station, 1a antenna, 2, 2A, 2B detection control apparatus, 3 radio receiving apparatus, 3a antenna, 4 radio receiving circuit, 5 synchronization signal generator, 6 position discrimination apparatus, 7 output adjustment apparatus, 10A, 10B detection control Circuit, 8 Movement direction discriminating device, 8m Memory, 9 Entrance / exit management device, 11-17 Detection device, 11a-17a Antenna, 21-27 Wireless transmission circuit, 91 Mobile device state storage device, 92 Traffic determination device, 93 Authentication device , 94 Guide device, 95 Locking and unlocking device, 110, 120, 130, 140, 150, 160, 170 Detection area, 300 door, 301 structure.

Claims (11)

A first detection device that wirelessly transmits a first detection signal and a first position determination signal to a predetermined first detection region;
A second detection device that wirelessly transmits a second detection signal and a second position determination signal to a predetermined second detection region;
The first and second detection signals are alternately transmitted, the second detection signal is transmitted following the first detection signal, and the first position is transmitted following the second detection signal. A detection control device for controlling the first and second detection devices so as to transmit a determination signal;
When the first detection signal is received, a first response signal indicating whether or not a second position determination signal following the received first detection signal has been received is wirelessly transmitted, and the second detection signal is transmitted. And a mobile device that wirelessly transmits a second response signal indicating whether or not a first position determination signal following the received second detection signal has been received. apparatus. The detection control device alternately transmits the first and second detection signals, sequentially transmits the first and second position determination signals following the first detection signal, and transmits the second detection signal. Controlling the first and second detection devices to sequentially transmit the second and first position determination signals following the detection signal;
When the mobile device receives the first detection signal, the mobile device wirelessly transmits a first response signal indicating whether or not the first and second position determination signals following the received first detection signal have been received. When the second detection signal is transmitted and the second detection signal is received, a second response signal indicating whether or not the second and first position determination signals following the received second detection signal have been received is transmitted by radio. The position detection device according to claim 1. The detection control device is
The first detection region is changed by changing the transmission output level of the first detection signal and the first position determination signal, and the transmission output of the second detection signal and the second position determination signal is changed. The position detection device according to claim 1, further comprising an output adjustment device that changes the second detection region by changing a level. At least one first detection device having a first detection region that does not overlap with each other;
4. The position detection device according to claim 1, further comprising at least one second detection device having a second detection region that does not overlap each other. 5. The detection control device is
Controlling the at least one first detection device to transmit the first detection signal substantially simultaneously and to transmit the first position determination signal substantially simultaneously;
The at least one second detection device is controlled so as to transmit the second detection signal substantially simultaneously and to transmit the second position determination signal substantially simultaneously. 4. The position detection device according to 4. The position detection device further includes a wireless reception device that wirelessly receives the first and second response signals,
The said detection control apparatus detects the position of the said mobile apparatus based on the 1st or 2nd response signal wirelessly received by the said radio | wireless receiving apparatus, The one of the Claims 1 thru | or 3 characterized by the above-mentioned. The position detection device according to one. The position detection device further includes first and second wireless reception devices,
The first and second response signals from the mobile device 1 are wirelessly received by at least one of the first and second wireless reception devices,
The detection control device is
A synchronization signal generator for generating a synchronization signal;
The first detection device is controlled to transmit the first detection signal and the first position determination signal in accordance with the synchronization signal, and the first or the first received by the first wireless reception device A first detection control circuit for outputting a second response signal;
The second detection device is controlled to transmit the second detection signal and the second position determination signal according to the synchronization signal, and the first or the second received by the second wireless reception device A second detection control circuit for outputting a second response signal;
A position discriminating device for detecting the position of the mobile device based on the first or second response signal output from the first and second detection control circuits. The position detection device according to any one of 3. The position detection device further includes a wireless reception device that wirelessly receives the first and second response signals,
6. The position detection device according to claim 4, wherein the detection control device detects the position of the mobile device based on the first or second response signal wirelessly received by the wireless reception device. . The position detection device further includes first and second wireless reception devices,
The first and second response signals from the mobile device 1 are wirelessly received by at least one of the first and second wireless reception devices,
The detection control device is
A synchronization signal generator for generating a synchronization signal;
In accordance with the synchronization signal, the at least one first signal is transmitted so as to transmit at least one of the first and second detection signals and at least one of the first and second position determination signals. A first device that controls a detection device and a part of the at least one second detection device and outputs the first or second response signal received by the first wireless reception device. Detection control circuit of
In accordance with the synchronization signal, the at least one first signal is transmitted so as to transmit at least one of the first and second detection signals and at least one of the first and second position determination signals. A second one that controls the remaining detection device of the detection device and the at least one second detection device and outputs the first or second response signal received by the second wireless reception device; A detection control circuit;
5. A position determination device that detects the position of the mobile device based on the first or second response signal output from the first and second detection control circuits. 5. The position detection device according to 5.   10. The apparatus according to claim 6, further comprising a movement direction determination device that determines a movement direction of the mobile device based on the position of the mobile device detected by the detection control device. The position detection device described in one. The first and second detection areas include a third detection area overlapping each other,
The position detection device is
An authentication device for authenticating the mobile device;
A locking and unlocking device that locks and unlocks the door included in the third detection area;
A mobile unit state storage device that stores the position of the mobile unit detected by the detection control device at a predetermined timing after the mobile unit passes through the door;
A guidance device for guiding the mobile device to a region other than the third region;
The mobile device in which the mobile device is authenticated by the authentication device, the mobile device is detected in a region other than the third detection region, and the position of the detected mobile device is stored in the mobile device state storage device When the mobile device is detected in the third detection area, the mobile device is moved to a position other than the third region. 8. The position detection device according to claim 1, further comprising an entrance / exit management device that controls the guide device so as to guide to the area.