JP5722062B2 - Tag device, portable terminal device, interrogator, response method, tag detection method, program - Google Patents

Description

  The present invention relates to a tag detection system, a tag device, an interrogator, and a mobile phone device.

  Conventionally, RF tags (also referred to as high frequency tags, RDIDs, etc.) have been used for tracking various things. There is an example in which this is applied to pedestrian tracking for traffic safety, and the above-mentioned patent document is an example.

  However, the conventional RF tag has a relatively short communication distance of about 5 to 10 m with the interrogator, and it is difficult to directly communicate with a vehicle running at a high speed while maintaining a safe distance. Therefore, auxiliary means such as relaying a roadside device as described in the following patent documents and the like is necessary.

JP 2008-5432 A JP 2003-346297 A

  However, there is a problem that a slight delay time occurs through the roadside device. When a delay of 100 milliseconds occurs due to the relay, there is a problem that a vehicle traveling at 60 km / hour travels a little less than 2 m, and this delay may be a problem depending on the structure of the road and surrounding buildings.

  Also, when the interrogators are close to each other, the method of stopping the operation when the interrogator detects the operation of another interrogator is generally taken, but in this method the interrogator side that stopped the operation There was a problem that reading with the camera was impossible.

  In addition, the RF tag is often assigned with a unique number, and there is a risk that privacy may be violated even if a pedestrian carrying it is not tracked.

  In the present invention, the Radio Law has recently been revised, and there has been a way to extend the communication distance of RF tags, eliminating the problems caused by delays during relaying, and only the information desired by pedestrians. The purpose is to provide a means to solve the problem of privacy by telling the vehicle.

  According to one aspect of the present invention, a tag device that includes a tag device carried by a pedestrian and an interrogator disposed in the vehicle, and that responds to a predetermined response request from the interrogator, and the vehicle The interrogator is arranged to transmit a signal for inquiring to the tag device, and to detect and display the tag device in response to a response from the tag device and a response request from another interrogator. There is provided a tag detection system comprising an interrogator, wherein the tag device is capable of setting a plurality of modes having different responses to the interrogator.

  The plurality of modes include a privacy mode that does not respond to radio waves emitted from any of the interrogators, and that the pedestrian is in an emergency state when responding to a response request from the interrogator. It includes at least one of an emergency mode to be notified. Furthermore, as a normal mode, there is generally a mode for displaying only that there is a pedestrian carrying the tag device to the interrogator.

  The interrogator can set a plurality of modes, and the plurality of modes includes at least one operation mode of an active mode for transmitting a signal and a passive mode for stopping the transmission of a signal. And In the passive mode state, the tag device cannot be actively detected by itself as in the active mode state, but the response of the tag device to the interrogator of the other vehicle and the command transmitted by the interrogator of the other vehicle. By receiving, the tag device can be detected. This is only when the unique number of the target tag device is specified when the active mode interrogator makes a tag read request, so when this command is transmitted, the tag device is detected. It means to be done.

  In addition, the present invention is an interrogator arranged in a vehicle, and transmits a signal for an inquiry to a tag device that is carried by a pedestrian and responds to a response to a predetermined response request from the interrogator. And an interrogator having an interrogator controller for detecting and displaying the tag device in response to a response from the tag device and a response request from another interrogator, wherein the interrogator controller transmits a signal The interrogator performs different control depending on the operation mode of the active mode for performing the transmission and the passive mode for stopping the transmission of the signal. It is preferable to enter the active mode when it is not detected that other interrogators are emitting radio waves. It is preferable to enter the passive mode when it is detected that another interrogator emits radio waves. Furthermore, it is preferable that a privileged command for responding to an inquiry can be used regardless of the mode of the tag device.

  Further, the present invention is a tag device that responds to a predetermined response request from an interrogator carried by a pedestrian and placed in a vehicle, and can set a plurality of modes with different responses to the interrogator. It is a tag device characterized by being. One of the plurality of modes is an emergency mode for notifying the interrogator that the pedestrian is in an emergency state when responding to the interrogator.

  In addition, one of the plurality of modes is a privacy mode that does not respond to radio waves emitted from any of the interrogators. In addition, regardless of any of the plurality of modes, the interrogator may respond to a privileged command. Further, the present invention may be a mobile terminal including any of the tag devices described above. In this case, it is preferable to have a receiving unit that receives a command transmitted from the interrogator. Furthermore, you may have the alerting | reporting part which alert | reports to a user that it received, By carrying the receiver of such a structure with a tag apparatus, a car notifies the existence of a pedestrian, It becomes possible to know the approach of the car, and it is possible to further reduce the possibility of an accident. The portable terminal characterized by having a receiving part which receives the response signal which the tag apparatus described in any one of the above emits.

  According to another aspect of the present invention, there is provided a tag detection method in a tag detection system having a tag device carried by a pedestrian and an interrogator arranged in a vehicle, wherein the tag device includes the question device. A step of setting a plurality of modes depending on a difference in response to the machine, a step in which the interrogator transmits a signal for inquiring to the tag device, and the tag device from the interrogator. And a step of detecting the tag device in response to a response from the tag device and another interrogator. A detection method is provided.

  The plurality of modes include a privacy mode that does not respond to radio waves emitted from any of the interrogators, and that the pedestrian is in an emergency state when responding to a response request from the interrogator. It is preferable to include an emergency mode for notification.

  The present invention may be a program for causing a computer to execute the tag detection method described above, or a computer-readable storage medium storing the program. Moreover, the processor which performs the process according to a tag detection method may be sufficient.

  According to the present invention, only information desired by a pedestrian can be transmitted to the vehicle.

It is a figure which shows an example of the positional relationship of an interrogator and a tag apparatus in the tag detection system by this Embodiment. It is a functional block diagram which shows one structural example of a vehicle-mounted interrogator. FIG. 3A is a functional block diagram illustrating a configuration example of the tag device of the present embodiment, and FIG. 3B is a diagram illustrating a configuration example of the receiver, and FIG. These are functional block diagrams for realizing a function including the tag device and the receiving device described in the first embodiment by adding a part of a circuit to the mobile phone device. It is a figure which shows the relationship between the range which an interrogator can read a tag apparatus, and the range which an interrogator can receive the transmission signal of another interrogator. It is a flowchart figure which shows the flow of operation | movement of an interrogator control part. It is a flowchart figure following FIG. 5A. It is a flowchart figure following FIG. 5B. It is a flowchart figure which shows the flow of operation | movement of the control part of a tag apparatus. It is a flowchart figure which shows the flow of operation | movement of the interrogator which uses the privileged command in the 3rd Embodiment of this invention.

  Hereinafter, a tag detection technique according to an embodiment of the present invention will be described in detail with reference to the drawings. In this embodiment, an example in which the tag detection system is used for traffic safety is described.

  In this specification, the “list” means that when the interrogator asks the tag device or another interrogator for a response unconditionally or conditionally, a response is returned to the list request command. A list of IDs of tag devices or other interrogators. The tag device returns its own ID as a response. In the case of a list request with a condition, a list that meets the condition is created by receiving only a response from a tag device or other interrogator that meets the condition. The interrogator refers to the list of tag devices or other interrogators responded in response to the list request, and performs mode switching and vehicle control.

(First embodiment)
The tag detection system according to the first embodiment of the present invention is an RF carried by an interrogator mounted on a vehicle or the like (moving body) and a pedestrian or the like (including a user or an object on a bicycle). A tag device (hereinafter referred to as a “tag device”). In the present embodiment, the case where four interrogators are provided in the vehicle will be described as an example.

  FIG. 1 is a diagram illustrating an example of a positional relationship between an interrogator and a tag device in the tag detection system according to the present embodiment. Reference numeral 101 denotes a vehicle equipped with an interrogator. Reference numerals 102, 103, 104, and 105 denote interrogators. Reference numerals 106, 107, 108, 109 are signal readout ranges of the tag devices of the respective interrogators 102, 103, 104, 105. Reference numerals 110, 111 are pedestrians carrying the tag devices. 112 and 113 are tag devices carried by pedestrians 110 and 111.

  The tag devices 110 and 111 can be provided with a plurality of modes that can be set by a pedestrian carrying the tag device. For example, in the present embodiment, as the plurality of modes, three modes of privacy mode, emergency mode, and normal mode can be used.

  The privacy mode is a mode that does not react to radio waves emitted from any of the interrogators 102 to 105 and hides the pedestrians 110 and 111 carrying the tag devices 112 and 113 from the interrogators 102 to 105. The emergency mode is a mode for displaying that the pedestrians 110 and 111 are in an emergency state on the consoles of the interrogators 102 to 105. The normal mode is a mode in which only the pedestrians 110 and 111 carrying the tag devices 112 and 113 are displayed on the interrogators 102 to 105.

  Each of the tag devices 112 and 113 has a unique number for each tag device, and responds to a list request from the interrogators 102 to 105 and a response to a tag reading request in which its own unique number is designated. . The response method varies depending on the mode of the tag devices 112 and 113.

  The interrogators 102 to 105 are arranged so as to cover the front-rear and left-right ranges of the vehicle 101. In the present embodiment, the interrogators 102 and 104 arranged on the left and right of the vehicle 101 cover the front side which is the traveling direction. The interrogator 103 arranged in front of the vehicle 101 has a reading distance in order to ensure time for the pedestrian to step on the brake in response to the tag device carried by the pedestrian even when the vehicle speed is at a certain level or higher. Set the range so that it can be long. That is, the antenna gain is set to increase as indicated by reference numeral 107. When the antenna gain is increased, the antenna beam width becomes narrower. Therefore, the beam widths of the reading ranges 106 and 108 of the interrogators 102 and 104 arranged on the left and right sides of the vehicle are widened so as to fill the blind spot of the reading range 107. The interrogator 105 provided on the rear side has a wide beam width in order to detect the entrainment during reverse travel or turning. All the interrogators 102 to 105 mounted on the vehicle 101 operate synchronously. At the time of transmission, the same data is transmitted from all the interrogators 102 to 105 at the same time, and at the time of reception, the reception operation is simultaneously performed. However, it is configured so that it can be distinguished from which interrogator the tag response is received.

  If interrogators of multiple vehicles operate at the same time, tag responses cannot be received normally. When it is detected that the interrogators of other vehicles are operating, radio emission from the interrogators is stopped. Transition to passive mode. On the other hand, a mode in which radio waves are emitted by itself is called an active mode.

  In the passive mode state, the tag device cannot be actively detected by itself as in the active mode state, but the tag device's response to the interrogator of another vehicle and the command transmitted by the interrogator of the other vehicle are received. By doing so, the tag device can be detected. This is only when the unique number of the target tag device is specified when the active mode interrogator makes a tag read request, so when this command is transmitted, the tag device is detected. It means to be done.

  Further, the range in which the interrogator can receive transmission signals of other interrogators is wider than the range in which the interrogator can read out the tag device. That is, as shown in FIG. 4, the tag device readout range 403 of the interrogator 402 of the other vehicle 401 is only around the other vehicle 401 surrounded by the solid line, but the interrogator 406 of the own vehicle 405 can receive it. Such a range is a region 404 surrounded by a broken line. In order for the tag device to operate, an electric field intensity sufficient to cover the power required for the operation of the circuit in the tag device is required, whereas the interrogator can receive a weak tag device response. This is because it is made with high sensitivity. This makes it possible to know the presence of a tag device outside the range that can be detected by the interrogator of the host vehicle 405. Further, even when the interrogator 406 of the own vehicle 405 cannot perform the questioning operation, it is possible to know the presence of the tag device.

  FIG. 2 is a functional block diagram showing a configuration example of the in-vehicle interrogator. The interrogators denoted by reference numerals 201, 202, 203, and 204 are interrogators (1) 201 to (4) 204 whose internal configurations may be the same, and the internal configuration will be described later. Reference numeral 205 denotes an interrogator controller that controls the interrogator (1) 201 to the interrogator (4) 204, reference numeral 206 denotes a CAN (Car Area Network) in which the inside of the vehicle is a service area, and reference numeral 207 denotes various The console display control part which controls the console display part 208 which displays information is shown. Next, a configuration example of the interrogator will be described.

  Reference numeral 211 denotes an antenna device that supplies electric power to the tag device and emits radio waves for inquiries and receives a response from the tag device. Reference numeral 212 denotes a directional coupler. Reference numeral 213 denotes an interrogator control. Reference numeral 214 denotes a transmitter that outputs an original carrier signal under the control of the unit 205. Reference numeral 214 denotes a modulator that modulates the original carrier using an encoded signal generated by the interrogator controller 205. Reference numeral 215 denotes a modulated signal. A multiplication unit that multiplies the signal and converts it to a transmission signal band. Reference numeral 216 denotes an amplification device that amplifies the signal in the transmission signal band to a specified output. The transmitter 213 to the amplifier 216 are referred to as a transmitter 209. Reference numeral 217 denotes an RF amplification unit that amplifies the reception signal, reference numeral 218 denotes a reception processing unit that converts the amplified reception signal into a baseband signal, and reference numeral 219 denotes a demodulation unit that demodulates the baseband signal. The RF amplification unit 217 to the demodulation unit 219 are referred to as a reception unit 210.

  There are four types of interfaces between the interrogator and the interrogator control unit 205, transmission unit control data for controlling the transmission unit 213 from the interrogator control unit 205, and encoded data output from the interrogator control unit 205. Transmission data, reception data that is a demodulated signal output from the reception unit 210, and a carrier detection signal output from the reception unit 210. With these as one set, a set for all the interrogators is prepared between the interrogator control unit 205.

  As a baseband signal encoding method and modulation method, various methods have been proposed for RF tag devices, and any method may be used. It is preferable that the response signal transmitted from the apparatus has the same encoding method and modulation method.

  In the present embodiment, it is assumed that Manchester code and AM modulation in which the code itself has collision detection capability are used. This is because the transmission signal from the interrogator and the response signal from the tag device are received by the same receiver, and the encoding method and modulation method at the time of transmission of the interrogator and the response transmitted from the tag device When the signal encoding method and the modulation method are different, it is necessary to be able to demodulate which signal is received by a method such as preparing a plurality of receiving units. Various packet formats have been proposed, including the ISO 18000 series, and any packet format may be used. In the present embodiment, it is assumed that anti-collision processing is possible, but various methods have been proposed for anti-collision processing, and the method is not particularly limited.

  Prior to command transmission, the interrogator control unit 205 sends transmission unit control data for operating the transmission unit to the interrogator so that a transmission band carrier is transmitted from the transmission unit 209. Thereafter, after a predetermined time has elapsed, data obtained by encoding the command sequence is transmitted to the interrogator as transmission data, modulated, multiplied, amplified, and transmitted from the antenna device 211 through the directional coupler 212.

  When receiving a response signal from the tag device, a signal received by the antenna device 211 passes through the directional coupler 212 and is input to the receiving unit 210. In the reception unit 210, the input signal is amplified by the RF amplification unit 217 and input to the reception processing unit 218. When a carrier used with the tag device is detected in the input signal, a carrier detection signal is output. Thereafter, the signal is converted into a baseband signal by the reception processing unit 218, converted into a signal encoded by the demodulation unit 219, and output as reception data. The interrogator control unit 205 starts reception processing when a carrier detection signal is input, starts decoding processing when reception data is input, and detects a response from the tag device or a command transmitted by another interrogator. .

  Further, the interrogator control unit 205 instructs the console display unit control unit 207 to display the contents of the console display unit 208 via the CAN 206 in response to a command response to the tag device and commands issued from other interrogators. The display content of the display unit 208 is controlled.

  FIG. 3A is a functional block diagram illustrating a configuration example of the tag device according to the present embodiment. As shown in FIG. 3A, reference numeral 306 denotes an antenna device that receives radio waves from the interrogator and transmits a response signal, and reference numeral 301 denotes when the received signal is reflected using the antenna device 306. In addition, it is a reflection type modulator that modulates under the control of the control unit 303, demodulates the input signal using a part of the circuit, and also operates as a receiving unit. Reference numeral 302 is emitted from the interrogator. The rectifier circuit unit rectifies part of the power of the radio wave to supply power to the reflective modulator 301 and the control unit 303. Reference numeral 303 denotes a command for the tag device from the demodulated signal output from the reflective modulator 301. The control unit 304 interprets the privacy mode switch 304 and the emergency mode switch 305 and responds by operating the reflective modulator 301 when a response is required. A privacy mode switch that is closed when the grayed device privacy mode, reference numeral 305 is an emergency mode switch that is closed when the tag device to the emergency mode. When the privacy mode switch 304 is closed, the tag device does not respond. When the emergency mode switch is closed and a tag reading command is received from the interrogator, a response indicating the emergency mode is made.

  A process flow of the control unit 303 provided to perform the operation described above will be described. First, the operation flow of the interrogator controller 205 will be described with reference to FIGS. 5A, 5B, and 5C.

  First, in step S501, the operation of the interrogator starts. It is assumed that at the start time, the transmitter of each interrogator is in a stopped state and is in a passive mode in which only reception is performed. In step S502, it is checked whether a carrier of an interrogator mounted on another vehicle or a carrier of a tag response is detected using all interrogators. If a carrier is detected here, the process proceeds to step S522. If no carrier is detected, the process proceeds to step S504. From step S504, the operation starts in the active mode, and the transmission timer for detecting transmission timeout is reset and started. Next, in step S505, transmission unit control data is sent to each interrogator, and the transmitter is operated. Subsequently, in step S506, transmission data is sent to each interrogator, and a list request for the tag device is transmitted. Next, in step S507, a response from the tag is received, and in step S508, it is determined whether any interrogator has actually received a tag response.

  If not received, the process proceeds to step S512. If received, the process proceeds to step S509. In step S512, it is determined whether or not a transmission timeout has occurred depending on whether or not the transmission timer has elapsed. If the transmission timer has not reached a transmission timeout (N), the process returns to step S506, and if the transmission timeout is determined (Y) The process proceeds to step S513. In step S513, transmission control data is transmitted to each interrogator, and the transmitter is stopped. Next, in step S514, a prescribed transmission stop time is waited, and the process returns to step S502. In step S509, based on the ID of the responding tag device that can be known by the response to the list request, it is determined from which interrogator the tag response has been received, and the tag is sent to the console display control unit 207 via the CAN 206. Instruct to display that there is a pedestrian in the direction of the interrogator where the response was received. Next, in step S510, it is checked whether or not a collision has occurred in the tag response to the list request. If no collision has occurred (N), only the unique number of the received response is added to the list and the process proceeds to step S515. If this occurs (Y), anti-collision processing is performed in step S511, the unique numbers of the tag devices within the range in which the interrogator can communicate are checked, these are added to the list, and the flow proceeds to step S515. In step S515, the counter for read processing is initialized to “1”.

  Note that anti-collision is a function that allows the tag reader / writer to read data from multiple tags at the same time. Causes a collision. In order to avoid this collision, the communication method between the IC tag and the reader (interrogator) is devised. For example, in a communication method called a binary tree, a reader first designates a specific range of IDs and sends a radio wave to a tag. The tag is configured to send a reply only when its own ID is within the range. If there are replies from multiple tags, the reader then narrows the range and sends the signal. By repeating this, when there is only one reply from the tag, it is possible to deal with collision by reading the data.

  Next, in step S516, if the current counter is greater than the number of unique numbers listed, (Y) return to step S502, otherwise (N) proceed to step S517. In step S517, a tag read command is transmitted by sending transmission data to all interrogators to the tag device with the unique number listed in the current counter in the list. Next, in step S518, the tag device waits for a response from the tag device. If tag reading fails, the tag device is processed as being in the normal mode (N), and then proceeds to step S521. If tag reading is successful, (Y ) If the content read in step S519 is not information indicating that the tag is in the emergency mode, the process proceeds to (N) step S521. If the content is information indicating the emergency mode, the process proceeds to (Y) step S520. The console display unit control unit 207 is instructed to display that the emergency mode tag device has been found, and the process proceeds to step S521. In step S521, the read processing counter is incremented by "1", and the process returns to step S516. Even if the tag reading fails in step S518 (N), the process returns from step S521 to step S516, and the tag reading process is repeated from the list inquiry as needed. Therefore, detection is performed as long as the tag device is within a communicable range.

  By the way, when a carrier from an interrogator or tag device of another vehicle is detected in step S503, (N) the process proceeds to step S522. From step S522, the operation becomes the passive mode, and the reception timer for detecting the reception timeout is reset and started, and the reception is continued. Next, in step S523, it is detected whether the interrogator of another vehicle has transmitted a tag read command or the tag device is not responding to a tag. If not detected (N), the process proceeds to step S524, and the reception timer is set. Whether the predetermined value is exceeded (whether it has timed out) is checked. If it has exceeded, (Y) the process returns to step S502 as a reception time-out, and if not (N), the process returns to step S523 again. When a tag read command and a tag response are received in step S523 (Y), there is a pedestrian in the direction of the interrogator from which the tag response is received to the console display control unit 207 via the CAN 206 in step S525. Instructs to display the effect. Next, in step S526, it is checked whether the received signal is a response to the tag read command. If the received signal is not a response to the tag read command (N), the process returns to step S522. If it is a response to the tag read command (Y), the process proceeds to step S527. If the response does not include information indicating that the tag device is set to the emergency mode (N), the process returns to step S522 and is included. If yes (Y), the process proceeds to step S528 to instruct the console display unit control unit 207 to display that the tag device in the emergency mode has been found, and the process returns to step S522. The interrogator controller operates as described above.

  The driver of the vehicle can see the display and be ready to step on the brake. If the brake can be operated automatically, the brake may be controlled.

  Next, the operation of the control unit of the tag device will be described with reference to FIG. As shown in FIG. 6, the tag process starts from step S601. In step S602, it is checked whether or not the output of the rectifier circuit 302 is sufficient to operate the tag device. If it is insufficient (N), the process returns to step S602. If it is sufficient, (Y) the power is turned on and the process proceeds to step S604. . In step S604, the entire tag device is initialized, and the reflective modulator 301 is set to a state where no modulation is applied. Next, in step S605, it is checked whether or not the privacy mode switch 304 is closed. If it is closed (Y), the process returns to step S605, and if it is open (N), the process proceeds to step S606. In step S606, a signal is received using the reflective modulator 301, and a command is sent from the interrogator. When it is not transmitted (N), the process returns to step S605, and when a command is received (Y), the process proceeds to step S607. In step S607, it is checked whether the received command is a list command that conforms to the unique number of the tag device. If the command is not a conforming list command, the process proceeds to (N) step S609. (Y) Proceed to step S608. In step S608, a response including the unique number of the own tag device is made as a response to the list command, and the process returns to step S605. In step S609, it is checked whether the received command is a read command addressed to the unique number of the own tag device. If the received command is not a read command addressed to the unique number of the own tag device, the process returns to (N) step S605. (Y) Proceed to step 610. In step S610, it is checked whether or not the emergency mode switch 305 is closed. In step S611, when the emergency mode switch is closed, a response indicating that the emergency mode switch 305 is open is displayed. A response indicating that it is in the normal mode is made, and the process returns to step S605. As described above, the tag device control unit operates.

  The examples shown above are examples for carrying out the object of the present invention. For other purposes, the tag device commands may be increased or the number of interrogators may be changed depending on the implementation cost. I do not care.

  As described above, in the tag system according to the first embodiment, the vehicle driver can quickly recognize the presence of surrounding pedestrians by using the in-vehicle interrogator and the tag device carried by the pedestrian. Is possible. In addition, the pedestrian can inform the vehicle of the presence of the vehicle even when he / she is in a dark place or in the shade only by carrying a tag device without a power source, for example, and can reduce the possibility of an accident. Furthermore, when the pedestrian himself becomes in some dangerous state, it is possible to notify the car driver of his / her state by setting the tag device to the emergency mode. Furthermore, if you do not want the car to find you for reasons such as when you want to be quiet alone, setting the tag device to privacy mode makes the tag device unresponsive and difficult to find from the car.

  In addition, since the pedestrian does not know the approach of the vehicle even if he / she has only the tag device, he / she may have a receiver for receiving the command transmission of the interrogator. A configuration example of a receiver for that purpose is shown in FIG.

  As shown in FIG. 3B, a configuration example of the receiver is almost the same as the receiving unit in the interrogator. That is, an antenna device 311 for receiving radio waves emitted from the interrogator, an RF amplification unit 312 that amplifies the reception signal, a reception processing unit 313 that converts the amplified reception signal into a baseband signal, and a baseband A demodulation unit 314 that demodulates the signal, a control unit 315 that detects a command emitted by the interrogator from the demodulated signal, and instructs the display unit 316 to display that the interrogator is at a close distance; A display unit 316 for displaying that there is an interrogator at a close range in response to an instruction from the unit 315.

  Pedestrians can carry a receiver with such a configuration along with the tag device to inform the car of the presence of the pedestrian and to be aware of the approach of the pedestrian himself, possibly resulting in an accident. It is possible to further reduce the property.

(Second Embodiment)
Recent mobile phone devices have advanced multi-function and high performance, and often have a control unit and a display unit that can afford to control various devices.

  By using this ample capacity and adding a part of the circuit to the mobile phone device, it becomes possible to realize the functions including the tag device and the receiving device described in the first embodiment. . Hereinafter, a configuration example in this case will be described with reference to FIG.

  The functional blocks denoted by reference numerals 306 and 301 are the same as the functional blocks described in the first embodiment, and reference numeral 306 is an antenna device that receives radio waves from the interrogator and transmits a response signal. Reference numeral 310 denotes a reception unit that reflects the received signal using the antenna device 306, modulates it under the control of the mobile phone control unit 321, and demodulates the input signal using a part of the circuit. Is a reflective modulator that also works. An internal block surrounded by a broken line indicated by reference numeral 325 is a block already included in the mobile phone, reference numeral 321 is a mobile phone control unit for controlling each part of the mobile phone, and reference numeral 322 is a mobile phone. 323 is a mobile phone power supply unit that supplies power for operating each block of the mobile phone, and 324 is a display unit of the mobile phone. This function can be used to realize the function of both the tag device and the receiving device in the first embodiment. In the tag device according to the first embodiment, a part of the electric power of the radio wave received by the rectifier circuit 302 is used to operate the reflective modulator 301. In this configuration example, the mobile phone power supply unit 323 is used. A so-called semi-passive tag configuration for supplying power is used. As a result, the reception operation is expected to be stable. A signal demodulated using the reflective modulator 301 is input to the mobile phone control unit 321, interprets a command for the tag device from the demodulated signal, and is set in advance using the mobile phone operation unit. As shown in the first embodiment in the emergency mode, the reflection type modulator 301 is operated to transmit a response signal. When a command for the tag device is received, the mobile phone display unit 324 displays that the command from the interrogator has been received.

  When a pedestrian carries a mobile phone device having such a configuration, the vehicle driver can quickly recognize the presence of surrounding pedestrians by using the in-vehicle interrogator and the mobile phone device carried by the pedestrian. Is possible. Also, pedestrians can carry the mobile phone device even when in the dark or in the shade, can inform the vehicle of the existence, can reduce the possibility of accidents, When a certain dangerous state is reached, it is possible to notify the driver of the vehicle of his / her state by setting the tag device to the emergency mode. Furthermore, if you do not want the car to find you for some reason, setting the tag device to privacy mode makes the tag device unresponsive and difficult to find from the car.

  Further, in the case of a semi-passive type tag device as in this embodiment, it is possible to always operate the receiving unit. Therefore, it is also possible to receive response signals from other tag devices without supplying power from the interrogator, and even if the radio waves emitted from nearby interrogators cannot be received due to the influence of shielding objects, etc. By receiving the response of the tag device, it is possible to know the approach of the vehicle equipped with the interrogator. Therefore, the tag device holder may be notified of the approach of the vehicle using this fact.

(Third embodiment)
In the case of the tag device of the first embodiment and the second embodiment, the mode is set to the privacy mode so that it does not respond to inquiries from the interrogator, but it cannot move due to a sudden accident. In such a case, the mode switch cannot be set to an emergency state, and it may be difficult to find by others.

  As a method for avoiding such a situation, in the present embodiment, a tag device that responds only to an inquiry from an emergency vehicle such as the police is used even if the privacy mode is set. Only an interrogator used in an emergency vehicle can use a privileged list command and a privileged tag read command.

  In addition to the response to the list request from the normal interrogator and the response to the tag reading request with its own unique number, the tag device is assigned the response to the privileged list request and its own unique number. It responds to a privileged tag read request. The tag device that has received the privileged command performs a response operation ignoring the state of the privacy mode switch.

  As the configuration of the interrogator that uses the privileged command, the one shown in the first embodiment can be used as it is. The processing flow of the control unit is almost the same, and the command to be used only needs to be changed to a privileged command.

  As for the tag device, the configuration shown in the first embodiment and the second embodiment can be used as it is. The processing flow of the control unit may be slightly changed so that privileged commands are always accepted. Hereinafter, an example of the flow will be described with reference to FIG.

  First, tag processing starts from step S701. In step S702, it is checked whether or not the output of the rectifier circuit 302 is sufficient to operate the tag device. If it is insufficient (N), the process returns to step S702. If it is sufficient (Y), the power is turned on and step S704 is performed. Proceed to In step S704, the entire tag device is initialized, and the reflective modulator 301 is set to a state where no modulation is applied. Next, in step S706, a signal is received using the reflection type modulator 301, and a command is sent from the interrogator. When it is not transmitted, the process returns to step S706, and when a command is received, the process proceeds to step S712. In step S712, it is checked whether or not the received command is a privileged list command that conforms to the unique number of the own tag device. If the command is not a privileged list command that conforms, the process proceeds to (N) step S714 and conforms. If it is a list command (Y), the process proceeds to step S713. In step S713, a response including the unique number of the own tag device is made as a response to the list command, and the process returns to step S706. In step S714, it is checked whether or not the received command is a privileged read command addressed to the unique number of the own tag device. If the received command is not a read command addressed to the unique number of the own tag device (N), the process proceeds to step S705. If yes (Y), the process proceeds to step S715. In step S715, it is checked whether or not the emergency mode switch 305 is closed. In step S716, when the emergency mode switch is closed, a response indicating that the emergency mode switch 305 is open is displayed. Makes a response indicating that it is in the normal mode, and returns to step S706. If the command received in step S714 is not a privileged read command addressed to the unique number of the own tag device (N), it is checked in step S705 whether the privacy mode switch 304 is closed. If (Y), the process returns to step S706, and if open, the process proceeds to (N) step 707. In step S707, it is checked whether or not the received command is a list command that conforms to the unique number of the own tag device. If the received command is not a conforming list command, (N) the list command conforms to step S709. In the case (Y), the process proceeds to step S708. In step S708, a response including the unique number of the own tag device is made as a response to the list command, and the process returns to step S706. In step S709, it is checked whether the received command is a read command addressed to the unique number of the own tag device. If the received command is not a read command addressed to the unique number of the own tag device, the process returns to step S706. (Y) Proceed to step S710. In step S710, it is checked whether the emergency mode switch 305 is closed. In step S711, when the emergency mode switch is closed, a response indicating that the emergency mode switch 305 is open is displayed. A response indicating that the normal mode is set is made, and the process returns to step S706.

  In the present embodiment, since the tag device control unit operates as described above, even if the tag device is set to the privacy mode, it is possible to respond to a privileged command from the emergency vehicle. It can be used effectively even in the event of an accident.

  The program that operates in the interrogator and the tag device related to the present invention is a program that controls the CPU or the like (a program that causes the computer to function) so as to realize the functions of the above-described embodiments related to the present invention. Information handled by these devices is temporarily stored in the RAM at the time of processing, then stored in various ROMs and HDDs, read out by the CPU, and corrected and written as necessary. As a recording medium for storing the program, a semiconductor medium (for example, ROM, nonvolatile memory card, etc.), an optical recording medium (for example, DVD, MO, MD, CD, BD, etc.), a magnetic recording medium (for example, magnetic tape, Any of a flexible disk etc. may be sufficient. In addition, by executing the loaded program, not only the functions of the above-described embodiment are realized, but also based on the instructions of the program, the processing is performed in cooperation with the operating system or other application programs. The functions of the invention may be realized.

  In the case of distribution in the market, the program can be stored and distributed in a portable recording medium, or transferred to a server computer connected via a network such as the Internet. In this case, the storage device of the server computer is also included in the present invention. Moreover, you may implement | achieve part or all of the mobile station apparatus and base station apparatus in embodiment mentioned above as LSI which is typically an integrated circuit. Each functional block of the mobile station apparatus and the base station apparatus may be individually made into a processor, or a part or all of them may be integrated into a processor. Further, the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor. In addition, when an integrated circuit technology that replaces LSI appears due to progress in semiconductor technology, an integrated circuit based on the technology can also be used.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and the design and the like within the scope not departing from the gist of the present invention are also claimed. Included in the range.

  The present invention can be used as a tag detection system.

101 ... Vehicle equipped with interrogator, 102, 103, 104, 105 ... Interrogator, 106, 107, 108, 109 ... Signal reading range of tag device of interrogator 102, 103, 104, 105, 110, 111 ... Tag Pedestrian carrying device, 112, 113 ... Tag device carried by pedestrian, 201, 202, 203, 204 ... Interrogator, 205 ... Interrogator control unit, 206 ... CAN (Car Area Network), 207 ... Console display unit control unit, 208 ... Console display unit, 209 ... Transmission unit, 211 ... Antenna device, 212 ... Directional coupler, 213 ... Transmission unit, 214 ... Modulation unit, 215 ... Multiplication unit, 216 ... Amplification device Receiving unit, 217 ... RF amplifying unit, 218 ... reception processing unit, 219 ... demodulating unit, 210 ... receiving unit 210, 301 ... reflective modulator, 302 ... Current circuit section, 303 ... control section, 304 ... privacy mode switch, 305 ... emergency mode switch, 306 ... antenna apparatus, 311 ... antenna apparatus, 312 ... RF amplification section, 313 ... reception processing section, 314 ... demodulation section, 315 ... Control unit, 316, display unit.

Claims (10)

A portable tag device that makes a response to a predetermined response request transmitted from an interrogator arranged in a vehicle,
There are a plurality of response methods for the response request,
There are a plurality of modes corresponding to the response method,
One of the plurality of modes is a privacy mode that does not respond to a response request transmitted from an interrogator arranged in the vehicle,
A tag device comprising means for switching between the plurality of modes.   2. The tag device according to claim 1, wherein one of the plurality of modes is an emergency mode for notifying the interrogator that a pedestrian is in an emergency state in response to the interrogator.   3. The tag according to claim 1, wherein a response is made when a privileged response request is received from the interrogator regardless of one of the plurality of modes. 4. apparatus. A tag device according to any one of claims 1 to 3 and a display unit .
Portable mobile terminal device and changes the display of the display unit in response to the received signal of the tag device. An interrogator located in the vehicle,
A transmitter for transmitting a signal for inquiring to the portable tag device;
A receiving unit for receiving an inquiry signal of an interrogator arranged in another vehicle and a response signal transmitted from the tag device;
Having an interrogator controller that controls the operation of the interrogator,
An interrogator characterized by transmitting a privileged response request that can request a response regardless of the mode of the tag device to the tag device. An interrogator located in the vehicle,
A transmitter for transmitting a signal for inquiring to the portable tag device;
A receiving unit for receiving an inquiry signal of an interrogator arranged in another vehicle and a response signal transmitted from the tag device;
Having an interrogator controller that controls the operation of the interrogator,
When an interrogator placed in another vehicle receives an inquiry signal transmitted to the tag device, the interrogator receives a response signal transmitted from the tag device without transmitting an inquiry signal by itself. Interrogator. In a portable tag device, in a response method to a response request transmitted from an interrogator arranged in a vehicle,
There are a plurality of response methods for the response request, and there are a plurality of modes corresponding to the response methods,
Depending on the mode selection of the tag device, selecting one mode from said plurality of response mode corresponding to the plurality of response methods,
When receiving a response request transmitted from an interrogator arranged in the vehicle, comprising the step of determining a response content according to the selected mode,
Wherein one of the plurality of modes is Ri Oh privacy mode that does not respond to the response request transmitted from the interrogator which is located in the vehicle, said tag device Rukoto comprises means for switching said plurality of modes A response method characterized by A tag detection method in an interrogator arranged in a vehicle,
A tag detection method comprising a step of transmitting a privileged response request capable of requesting a response regardless of a mode of a portable tag device. A tag detection method in an interrogator arranged in a vehicle,
A step of receiving a response signal transmitted from the tag device even if the interrogator arranged in another vehicle receives the inquiry signal transmitted to the portable tag device even if the interrogator does not transmit the inquiry signal A tag detection method characterized by comprising:   A program for causing a computer to execute the method according to any one of claims 7 to 9.

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