JP4831501B2 - Wireless communication device and wireless communication system - Google Patents

Description

  The present invention relates to a wireless communication device and a wireless communication system used in the security field and the like.

  Conventionally, a non-contact type in which an IC (integrated circuit) is embedded in a card such as a credit card or a cash card, specific information is stored in the IC, and information is transmitted / received or updated with a reading / writing device in a non-contact manner. IC card system is in operation. For example, Patent Document 1 discloses a solar battery that converts solar energy into electric power, a secondary battery that is charged by the solar battery, a switch provided between the secondary battery and the IC, and a magnetic field. There is disclosed an IC card that includes a thin coil that receives a dielectric electromotive force and receives an induced electromotive force generated in the thin coil to turn on a switch to supply a power supply voltage from a secondary battery to the IC.

  In addition to a credit card or a cash card, a contactless card system having a function of transmitting information to an operator nameplate of a data processing apparatus or the like is also generally known. For example, Patent Document 2 receives an identification signal transmitted from a name plate device including a communication device including a thin battery, an electronic circuit, and a transmission element, and an identification code corresponding to the identification signal is stored in advance. There is described an input permission system configured to permit an operation of a data processing device when it matches an identification code.

JP-A-11-134456 Japanese Patent No. 2575712 JP 2007-72848 A

  By the way, in such a conventional non-contact IC card system, an IC card or the like is used as a wireless transmitter (transmission module), and a security gate device such as a so-called flapper gate (for example, Patent Document 3 discloses a non-contact ticket medium). If a wireless receiver (reception module) is installed (built-in) in a terminal device such as a ticket gate machine that uses the ticket gate processing, the radio wave to be transmitted depends on the usage state of the wireless transmitter. There is a possibility that the directivity changes and the terminal device to be operated cannot be operated. In addition, due to such a change in radio wave directivity, for example, when a plurality of security gates are provided, a security gate different from the security gate to be operated may be opened and closed.

  Furthermore, the directivity of radio waves transmitted from a wireless transmitter and the detection range (area) of the radio waves cannot be controlled, or the directivity of radio waves itself depends on the surrounding environment (radio wave environment and equipment installation environment). In this case as well, there is a possibility that the terminal device such as the target security gate cannot be reliably operated or a terminal device other than the target terminal is operated.

  Therefore, the present invention has been made in view of such circumstances, and the directivity of radio waves is not affected by the installation state (installation environment) of devices such as a radio transmitter and radio receiver and the radio wave environment around them. It is an object of the present invention to provide a wireless communication device and a wireless communication system that can control the performance as desired, and can reliably operate the target device.

  In order to solve the above-described problems, a wireless communication device according to the present invention includes a signal processing circuit, a high-frequency circuit, and an antenna element that receive a signal transmitted from a wireless transmitter having a signal processing circuit, a high-frequency circuit, and an antenna element. A wireless receiver having the antenna element provided in or around the antenna area defined by the antenna element of the wireless receiver, and the antenna element together with the antenna element An infrared sensor constituting a part is further provided, and the entire antenna of the wireless receiver has directivity in the direction of the sensing area of the infrared sensor. Note that, from the viewpoint of increasing the sensitivity of the entire antenna of the wireless receiver, the infrared sensor is preferably mounted in an antenna region defined by the antenna element.

  In such a wireless communication device, the signal processing circuit provided in the wireless receiver not only receives and processes the signal transmitted from the wireless transmitter, but also detects the infrared sensor that forms part of the entire antenna of the wireless receiver. The signal processing circuit of the wireless receiver that receives the detection signal from the infrared sensor can be controlled based on the detection signal. For example, when a signal processing circuit of a wireless receiver receives a detection signal from an infrared sensor, the antenna element receives an information signal such as ID information that can be transmitted from the wireless transmitter and processes the information signal. Configured. At this time, since the entire antenna of the wireless receiver has directivity in the direction of the sensing area of the infrared sensor, the movement of the object (such as the movement of a person) that is desired to be detected by the infrared sensor within the desired target area in the direction of the sensing area. ) Can be reliably detected. In other words, the wireless receiver of the present invention can reliably prevent erroneous detection of the operation of the object outside the desired target area.

  More specifically, the signal processing circuit of the wireless receiver has an infrared detection circuit connected to the infrared sensor, the infrared detection circuit, and a wireless signal reception circuit connected to the antenna element of the wireless receiver. The wireless signal receiving circuit can be configured to operate based on the detection signal from the infrared detection circuit.

  In this case, the radio signal receiving circuit is normally in a non-operating state (sleep state). When an object is detected in the target area in the direction of the sensing area of the infrared sensor, the detection signal is sent to the radio signal receiving circuit. Then, the radio signal receiving circuit is activated (activated). Thereby, for example, a state in which a transmission signal (information signal) including an ID number transmitted from a wireless transmitter can be received and processed by the wireless receiver is generated, while a detection signal from the infrared sensor is interrupted, It again enters a non-operating state (sleep state).

  Regarding the directivity of the entire antenna of the radio receiver, the entire antenna of the radio receiver has directivity in a direction intersecting the plane of the antenna area defined by the antenna element of the radio receiver. is there. That is, the entire antenna of the radio receiver can be configured not to have directivity in the extending direction of the plane of the antenna region defined by the antenna element of the radio receiver.

  Furthermore, the overall antenna of the radio receiver has a higher sensitivity on one side of the plane of the antenna area defined by the antenna elements of the radio receiver than on the other side of the plane of the antenna area. Useful. In other words, the entire antenna of the wireless receiver does not have an equal directivity in the front and back direction across the plane of the antenna area defined by the antenna element of the wireless receiver, but on one side (for example, It is preferable to have a high directivity that is biased toward the infrared detection direction (sensitivity direction, front side of the infrared sensor) of the infrared sensor.

  More specifically, the entire antenna of the wireless receiver is configured so that the sensitivity on the component mounting surface side of the wireless receiver is higher than the sensitivity on the side opposite to the component mounting surface of the wireless receiver. Is also suitable.

Furthermore, following formula (1);
h / A ≧ 0.5 (1),
It is more preferable that it is provided so as to satisfy the relationship represented by the following formula (2);
h / A ≧ 0.65 (2),
It is even more preferable that it is provided so as to satisfy the relationship represented by. In the formula, “h” indicates the height of the infrared sensor, and “A” indicates the length of the short side of the plane of the antenna area defined by the antenna element in the wireless receiver (“A” and “h”). Are the same scale).

  The “infrared sensor height” refers to the height from the installation surface of the substrate (base) on which the antenna element is installed (mounted) to the upper end of the infrared sensor in the wireless receiver. The “short side of the plane” indicates the short side when the outer periphery of the area where the antenna area is defined in the wireless receiver (for example, the entire component mounting board or substantially the entire board) is regarded as a rectangle (square). The infrared sensor and the antenna element may be installed on different substrates. As described above, the “antenna area plane” defined by the antenna element of the wireless receiver is not limited to a rectangle, and may be, for example, a shape in which square corners are chamfered, an ellipse, On the side (periphery), for example, a concave portion such as a notch may be formed, and conversely, a convex portion such as a bulge may be formed.

  According to the knowledge of the present invention, the detection sensitivity of the entire antenna of the wireless receiver in the sensitivity direction of the infrared sensor in the plane of the antenna region (hereinafter referred to as “front” for convenience, usually on the component mounting surface side of the board) ( = Communication distance) is S1, and the antenna of the wireless receiver in the direction opposite to the sensitivity direction of the infrared sensor in the plane of the antenna area (hereinafter referred to as “rear” for convenience. Usually, on the side opposite to the component mounting surface on the board) When the overall detection sensitivity (= communication distance) is S2, when S1 / S2 serving as an index indicating the high directivity in one direction of the infrared sensor is a condition represented by the above formula (1), 2 or more, that is, the detection sensitivity of the front by the infrared sensor is twice or more than the detection sensitivity of the rear, and in the case of the condition expressed by the above formula (2), 3 or more, that is, the infrared sensor Front of the detection sensitivity due it be more than three times behind the detection sensitivity was confirmed. Since the wireless receiver has such detection sensitivity, it is possible to prevent the infrared sensor from erroneously detecting the operation of the object outside the desired target area, and the object to be detected by the infrared sensor. Can be detected more reliably.

  Furthermore, it is more preferable that the infrared sensor has a metal casing provided with an infrared detection window. If the infrared detection window is provided in the infrared sensor in this way, it becomes easy to regulate the direction of sensitivity, and by having the metal casing, the infrared sensitivity described above is maintained while maintaining high wireless sensitivity of the entire antenna. There is an advantage that the ratio of the front sensitivity S1 and the rear sensitivity S2 of the sensor can be easily adjusted to a suitable value.

  In addition, a wireless communication system according to the present invention is effectively configured to include the above-described wireless receiver according to the present invention, and includes a wireless transmitter having a signal processing circuit, a high-frequency circuit, and an antenna element, and a wireless A signal processing circuit for receiving a signal transmitted from a communication device, a high-frequency circuit, and a wireless receiver having an antenna element, and within or within the antenna area defined by the antenna element of the wireless receiver It further includes an infrared sensor that is provided in the periphery and forms a part of the entire antenna of the wireless receiver together with the antenna element. The entire antenna of the wireless receiver is directed toward the sensing area of the infrared sensor. It has sex.

  Alternatively, a wireless communication system according to the present invention is configured effectively with the above-described wireless receiver according to the present invention, and is transmitted from a wireless transmitter having a signal processing circuit, a high-frequency circuit, and an antenna element. A signal processing circuit for receiving a received signal, a high-frequency circuit, and a wireless receiver having an antenna element, and is provided in or around the antenna area defined by the antenna element of the wireless receiver. And an infrared sensor that forms part of the entire antenna of the wireless receiver together with the antenna element, and the entire antenna of the wireless receiver has directivity in the direction of the sensing area of the infrared sensor. And a gate device having a side wall provided with a wireless receiver.

  In this configuration, if the wireless receiver is provided below the center of the height of the side wall of the gate device, it is useful because it becomes easy to detect the movement of the limbs (foot movement) of a person or the like.

  In this case, a plurality of wireless receivers are provided, and the plurality of wireless receivers are installed so that the sensing areas of the respective infrared sensors overlap with each other. This is preferable because it can be detected.

  According to the wireless communication device and the wireless communication system of the present invention, the entire antenna of the wireless receiver has directivity in the direction of the sensing area of the infrared sensor, and thereby, within a desired target area in the direction of the sensing area, It is possible to reliably detect the motion of the target object to be detected by the infrared sensor and to prevent erroneous detection of the motion of the target object outside the desired target area, such as a wireless transmitter or a wireless receiver. The directivity of radio waves can be controlled as desired without being affected by the installation state (installation environment) of the devices and the radio wave environment around them. In addition, this makes it possible to reliably operate the target device.

It is a functional block diagram which shows the structure of suitable one Embodiment of the radio | wireless communication apparatus and radio | wireless communications system by this invention. 3 is a timing chart of intermittent communication according to a preferred embodiment of a wireless communication device and a wireless communication system according to the present invention. It is a top view which shows roughly an example of a structure of the radio | wireless communications system 100 containing the security gate apparatus 3 by which the radio | wireless receiver 2 is mounted. It is a front view which shows roughly an example of a structure of the radio | wireless communications system 100 containing the security gate apparatus 3 with which the radio | wireless receiver 2 was mounted. It is a top view which shows roughly the other example of a structure of the radio | wireless communications system 100 containing the security gate apparatus 3 by which the radio | wireless receiver 2 is mounted. It is a front view which shows schematically the other example of a structure of the radio | wireless communications system 100 containing the security gate apparatus 3 by which the radio | wireless receiver 2 is mounted. It is a top view which shows roughly the further another example of a structure of the radio | wireless communications system 100 containing the security gate apparatus 3 by which the radio | wireless receiver 2 is mounted. It is a front view which shows schematically the further another example of a structure of the radio | wireless communications system 100 containing the security gate apparatus 3 by which the radio | wireless receiver 2 is mounted. FIG. 4 is a plan view and a side view schematically showing an example of the arrangement of the infrared detection circuit 73a, the wireless signal reception circuit 73b, and the infrared sensor 74 among the components mounted on the component mounting board S. It is a graph which shows the change of the value of ratio of front sensitivity S1 / rear sensitivity S2 with respect to the value of ratio of height h of an infrared sensor / length A of the short side of component mounting board S. FIG. 10 is a plan view and a side view schematically showing another example of the arrangement of the infrared detection circuit 73a, the radio signal reception circuit 73b, and the infrared sensor 74 among the components mounted on the component mounting board S.

  Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted. Further, the positional relationship such as up, down, left and right is based on the positional relationship shown in the drawings unless otherwise specified. Furthermore, the dimensional ratios in the drawings are not limited to the illustrated ratios. Further, the following embodiments are exemplifications for explaining the present invention, and are not intended to limit the present invention only to the embodiments. Furthermore, the present invention can be variously modified without departing from the gist thereof.

  FIG. 1 is a functional block diagram showing a configuration of a preferred embodiment of a wireless communication device and a wireless communication system according to the present invention. The wireless communication system 100 includes a wireless transmitter 1 and a wireless receiver 2. Note that the wireless communication device of the present invention may be considered to be composed of only the wireless receiver 2.

  The wireless transmitter 1 includes a power supply unit 40 and a wireless module 50 housed in a housing case 10 having a card or plate shape, for example. The power supply unit 40 includes a solar battery 41 (power generation element), a secondary battery 42 (power storage device), and a charging circuit 43. The wireless module 50 includes the antenna element 20 and the transmission module 30. The transmission module 30 includes a signal processing circuit 31 and a high frequency circuit 32.

  The signal processing circuit 31 includes a semiconductor device such as a CPU and a memory IC, and performs control for suppressing power consumption, output processing of an ID number (identification number), and the like. In the memory IC, an ID number and a communication format are stored in advance. The ID number is unique identification information assigned to uniquely identify the wireless transmitter. The communication format conforms to a predetermined communication protocol (for example, a communication protocol for a 400 MHz band specific power-saving radio). Various memories such as a nonvolatile memory and a volatile memory can be applied as the memory IC.

  Further, the CPU reads the communication format together with the ID number from the memory IC, and intermittently modulates the modulation signal of a predetermined interface format (for example, UART serial interface format) modulated at a predetermined transfer rate (for example, 9600 bps) to the high frequency circuit 32. Output regularly and periodically. For example, an 8-bit microcomputer can be used as the CPU.

  Furthermore, the signal processing circuit 31 performs intermittent communication as shown in a timing chart in FIG. 2 as control for suppressing power consumption. In such intermittent communication, an ID number is output in a predetermined communication format during a transmission period (for example, 15 msec) that operates as a communication mode in a predetermined transmission cycle (for example, 15-second cycle), and other standby modes (sleep mode) ) In the sleep period (for example, 1485 msec), the operations of the signal processing circuit 31 and the high frequency circuit 32 shift to a standby state. The signal processing circuit 31 and the high frequency circuit 32 suppress the power consumption of the secondary battery 42 by alternately repeating the communication mode and the standby mode.

  The high-frequency circuit 32 includes passive components such as a chip inductor, a chip capacitor, and a chip resistor, and active components such as a semiconductor device such as a transistor. The high-frequency circuit 32 receives the modulation signal from the signal processing circuit 31 and modulates the transmission signal including the ID number of the wireless transmitter 1 (for example, a binary FSK modulation signal in the 300 MHz band) according to the communication format. The antenna element 20 converts the transmission signal generated by the high frequency circuit 32 into an electromagnetic wave and radiates it. The electromagnetic wave radiated from the antenna element 20 is designed to comply with a weak wireless standard having a fundamental frequency of 315 MHz, for example.

  The solar cell 41 is a power generation element that converts light energy (light energy such as sunlight or illumination light) into DC power. The housing case 10 that houses each part (the antenna element 20, the transmission module 30, and the power supply part 40) of the wireless transmitter 1 is made of a resin material such as white polycarbonate, and has appropriate opacity, Although each part of the wireless transmitter 1 cannot be visually recognized from the outside, the solar battery 41 is configured to absorb light energy. Note that the power generation element is not limited to the solar battery 41, and may be any photovoltaic power generation element that converts light energy into electrical energy. For example, a vibration power generation element that converts vibration energy into electrical energy, A thermoelectric conversion element that converts thermal energy into electrical energy, an electromagnetic induction power generation element that converts electromagnetic energy into electrical energy, and the like may be mounted together. In the case of not being a solar cell, the housing case 10 may be opaque to the extent that it does not transmit light energy.

  The secondary battery 42 is a power storage device that stores electric power supplied to the signal processing circuit 31 and the high frequency circuit 32. The secondary battery 42 is, for example, a lithium ion battery, and outputs a voltage of, for example, DC 3V by rating. The secondary battery 42 with the rated voltage consumes power in the range of about 1.8V to 3.3V, depending on the minimum operating voltage level in the signal processing circuit 31 and the high frequency circuit 32. The power storage device is not limited to the secondary battery 42, and may be a capacitor, for example.

  The charging circuit 43 controls power supply from the solar battery 41 to the secondary battery 42 and power supply from the secondary battery 42 to the transmission module 30. The charging circuit 43 monitors the function of preventing the backflow of current from the secondary battery 42 to the solar battery 41 and the terminal voltage of the secondary battery 42, stops charging the secondary battery 42 during overcharge, It has a function of stopping overdischarge of the secondary battery 42 during discharge. Specifically, the charging circuit 43 lengthens the transmission cycle or temporarily stops wireless communication until the secondary battery 42 is sufficiently charged. Further, a protection function for preventing inflow of overcurrent to the transmission module 30 may be added to the charging circuit 43.

  The charging circuit 43 controls the above-described power supply based on the logical value of the control signal CTL output from the signal processing circuit 31. As described above, the transmission module 30 always performs intermittent communication in which the communication mode and the standby mode are alternately repeated. During the transmission period that operates as the communication mode, the transmission module 30 is supplied with operating power (power necessary for wireless transmission) from the secondary battery 42 to the transmission module 30 and from the solar battery 41 to the secondary battery 42. During the sleep period in which the logic value of the control signal CTL is controlled so that charging power is not supplied and operates as a standby mode, the transmission module 30 transmits standby power (consumed during standby) from the secondary battery 42 to the transmission module 30. The control signal CTL is controlled so that the charging power is supplied from the solar battery 41 to the secondary battery 42.

  By such control, the power of the secondary battery 42 consumed by the transmission module 30 during the communication mode can be supplemented from the solar battery 41 to the secondary battery 42 during the standby mode. Further, since the impedance of the secondary battery 42 during the standby mode period is lower than the impedance of the secondary battery 42 during the communication mode period, there is an advantage that the secondary battery 42 can be charged more easily than when it is constantly charged. .

  Assuming that 15 mA current is consumed in the communication mode and 1.0 μA current is consumed in the standby mode, the average consumption current consumed by intermittent communication with a duty of 0.1% is 16 μA. Here, when experimental data indicating the relationship between the received light illuminance of the solar cell 41 and the generated current is acquired, about 100 Lux is obtained during normal use in the office (for example, when the wireless communication device 10 is stored in the breast pocket). The generated current of the solar cell 41 obtained with this level of illuminance is about 16 μA. By arranging the wireless communication device 10 in an environment where a suitable illuminance can be obtained, the power consumption of the wireless communication device 10 (the operating power consumed during the communication mode and the standby power consumed during the standby mode) The total power) can be sufficiently supplemented by the solar cell 41. As a result, it is possible to provide the wireless communication device 10 that eliminates the need for battery replacement and has no limitation on the communication time.

  On the other hand, the wireless receiver 2 is connected to, for example, an electronic device including a security gate device such as a flapper gate device described later, a mobile terminal such as a mobile phone, a computer device such as a personal computer, a personal computer, and various other OA devices. The electronic device is equipped with a wireless communication function such as a card or a USB terminal device, and includes a wireless module 70 and a CPU 80 housed in the housing 60. The wireless module 70 includes an antenna element 71, a high frequency circuit 72, a signal processing circuit 73, and an infrared sensor 74.

  The infrared sensor 74 has a sensor body housed in, for example, a metal casing made of stainless steel or the like having a cylindrical shape with an infrared detection window (window). As an outer shape, for example, a height of about 10 mm × diameter The thing of about 8 mmphi is mentioned. The infrared sensor 74 is provided with an antenna element 71, and is installed in the antenna area defined by the antenna element 71 or around (in the vicinity of) the antenna area. This infrared sensor 74, combined with the antenna 71 element, functions as the entire antenna of the wireless module 70, that is, the “antenna 7”, and has high directivity when detecting by infrared rays toward the front of the infrared detection window. is there.

  The signal processing circuit 73 includes an infrared detection circuit 73a connected to the infrared sensor 74 and a wireless signal reception circuit 74b connected to the infrared detection circuit 73a. Each of the infrared detection circuit 73a and the wireless signal reception circuit 74b includes a semiconductor IC and can perform a predetermined logical operation.

  In this wireless module 70, the wireless signal receiving circuit 73b is normally (a state in which the infrared sensor 74 does not sense a moving object that is a detection target, a state in which no moving object has entered the sensing area of the infrared sensor 74), non- When the moving object that is the object is detected in the target area in the sensing area direction of the infrared sensor 74 in the operating state (sleep state), the detection signal is transmitted from the infrared detection circuit 73a to the wireless signal reception circuit 73b, and wirelessly received. The signal receiving circuit 73b is activated (activated). As a result, a state is generated in which the wireless receiver 2 can receive and process a transmission signal (information signal) including an ID number and the like transmitted from the wireless transmitter 1.

  In this state, the ID number included in the transmission signal radiated as a radio wave from the wireless transmitter 1 is received by the antenna element 71, demodulated by the high frequency circuit 72, and the radio signal receiving circuit 73 b of the signal processing circuit 73. And is output to the CPU 80 in a predetermined interface format (for example, UART serial interface format). On the other hand, when the detection signal from the infrared sensor 74 is interrupted, the wireless signal receiving circuit 73b is again inactivated (sleep state).

  The CPU 80 authenticates the wireless transmitter 1 based on the ID number received by the wireless module 70. For example, when the wireless receiver 2 is a mobile phone, the user carrying the wireless transmitter 1 moves to move the wireless transmitter 1 and the wireless receiver 2 apart from each other by a certain distance, and the infrared sensor 74 Without detection, the wireless receiver 2 locks, and when the wireless transmitter 1 and the wireless receiver 2 come within a certain distance and the user enters the sensing area of the infrared sensor 74, the wireless receiver 2 is unlocked. Lock it.

  Here, FIGS. 3A and 3B are a top view schematically showing a configuration of a wireless communication system 100 including a security gate device 3 (gate device) such as a so-called flapper gate device on which the wireless receiver 2 is mounted, respectively. It is a front view. Note that the wireless communication system of the present invention may be considered to be composed of the wireless receiver 2 and the security gate device 3.

  In the security gate device 3 of the wireless communication system 100, a plurality of gate casings 11 (which may also serve as the casing 60 described above) are arranged side by side so that a person can pass in the direction indicated by the arrow Y in FIG. As shown in the figure, it is a part below the center of the height of the predetermined gate casing 11 (part close to the space through which a person's feet pass), and in front of the flat opening / closing flapper 12. A radio receiver 2 is installed in the side part. Each wireless receiver 2 has directivity such that the sensing region D of the infrared sensor 74 described above is in a range limited toward the gate housing 11 facing the wireless receiver 2. Thus, the sensing area D of the infrared sensor 74 has a significant directivity toward the front of the infrared sensor 74, and conversely, does not have a significant directivity behind the infrared sensor 74.

  In the wireless communication system 100 as the security gate device configured as described above, a person who is a detection target moves between the gate casings 11 in the direction indicated by the arrow Y, and the person's foot is When entering the sensing area D of the infrared sensor 74 of the wireless receiver 2, the infrared sensor 74 detects it, and the detection signal is sent from the infrared detection circuit 73a of the signal processing circuit 73 of the wireless module 70 to the wireless signal receiving circuit 73b. Sent out. As a result, the wireless signal receiving circuit 73b in the non-operating state (sleep state) is activated, the wireless receiver 2 is unlocked, and the radio signal transmitted from the wireless transmitter 1 carried by the person is transmitted. The ID number included in the signal is received by the antenna element 71, demodulated by the high frequency circuit 72, decoded by the radio signal receiving circuit 73b of the signal processing circuit 73, and output to the CPU 80. Then, the CPU 80 authenticates the ID number and performs a control process for opening the closed open / close flapper 12.

  Next, FIGS. 4A and 4B are the wireless communication systems shown in FIGS. 3A and 3B, except that the installation height and the installation angle in the gate housing 11 of the wireless receiver 2 are different (inclined vertically downward). FIG. 1 is a top view and a front view schematically showing a configuration of a wireless communication system configured in the same manner as 100 (denoted by the same reference numeral 100 for convenience). 3A and 4A are substantially the same figure. The radio communication system 100 shown in FIGS. 4A and 4B also performs the same operation as the radio communication system 100 shown in FIGS. 3A and 3B. In addition, since the wireless receiver 2 is provided to be inclined downward, even when the sensitivity of the infrared sensor 74 extends to a far front position (when the front communication distance is long), the adjacent gate casing 11 is provided. It is suppressed to have sensitivity beyond this, and this makes it easier to prevent the open / close flapper 12 on the adjacent gate casing 11 side from malfunctioning to open and close.

  Further, FIGS. 5A and 5B are wireless communications configured in the same manner as the wireless communication system 100 shown in FIGS. 3A and 3B, except that the installation quantities of the wireless receiver 2 in the predetermined gate housing 11 are different. It is the top view and front view which show the structure of a system (it shows with the same code | symbol 100 for convenience) schematically. In this wireless communication system 100, as shown in the figure, a pair (one set) of wireless receivers 2 and 2 are provided for a pair (one set) of gate casings 11 and 11 and open / close flappers 12 and 12. .

  The wireless communication system 100 shown in FIGS. 5A and 5B also performs the same operation as the wireless communication system 100 shown in FIGS. 3A and 3B. Even when the sensitivity of the infrared sensor 74 reaches only a short position ahead (when the front communication distance is short), when a person passes between the gate casings 11, 11, the person is in any gate casing. Even if it passes through a position biased to the body 11, the person can be reliably detected.

  Here, in the wireless receiver 2, the shape parameter of the component mounting board on which the antenna element 71 is mounted and the sensitivity of the infrared sensor 74 when the shape parameter of the infrared sensor 74 changes (forward sensitivity and backward sensitivity; both are communication) Various distances were evaluated. FIG. 6 is a plan view and a side view schematically showing an example of the arrangement of the infrared detection circuit 73a, the wireless signal reception circuit 73b, and the infrared sensor 74 among the components mounted on the rectangular component mounting board S. Are shown together in FIG. In this arrangement example, the plane of the entire area of the component mounting board S corresponds to the plane of the antenna area defined by the antenna 71 of the radio receiver 2, and the antenna 7 is connected to the antenna 7 and the infrared sensor 74. Composed. In the drawing, A indicates the length (mm) of the short side of the component mounting board S, B indicates the length (mm) of the long side of the component mounting board S, and h indicates the height (mm) of the infrared sensor. ).

  The values of these shape parameters and the evaluation results of the sensitivity of the obtained infrared sensor 74 are collectively shown in Table 1 (data of A = 20 mm, B = 40 mm, and h = 10 mm are shown in duplicate for convenience). ). Further, the change in the ratio value of the forward sensitivity S1 / rear sensitivity S2 with respect to the ratio of the ratio of the height h of the infrared sensor / the length A of the short side of the component mounting board S, obtained from the results shown in Table 1, This is shown in the graph of FIG. The value of the ratio of S1 / S2 indicates the high directivity of the infrared sensor 74 of the wireless receiver 2 on one side (component mounting surface side, front side) of the component mounting board S, as described above. One of the indicators. From these results, if h / A is 0.5 or more, S1 / S2 is 2 or more (the front sensitivity is more than twice the rear sensitivity), and if h / A is 0.65 or more, S1 / S2 It was confirmed that S2 is 3 or more (front sensitivity is 3 times or more of rear sensitivity), and has extremely high directivity.

  In addition, as above-mentioned, this invention is not limited to said each embodiment, A various deformation | transformation is possible in the limit which does not change the summary. For example, FIG. 8 is a plan view and a side view schematically showing another example of the arrangement of the infrared detection circuit 73a, the wireless signal reception circuit 73b, and the infrared sensor 74 among the components mounted on the component mounting board S. is there. Thus, the antenna element 71 and the infrared sensor 74 may be mounted on separate substrates Sa and Sb, respectively. In this case, the plane of the region of the substrate Sa on which the antenna element 71 is mounted is the radio receiver 2. The infrared sensor 74 is installed in the vicinity of the periphery of the antenna region.

  As described above, the wireless communication device and the wireless communication system of the present invention are capable of directing radio waves without being affected by the installation state (installation environment) of devices such as a radio transmitter and a radio receiver and the surrounding radio wave environment. Therefore, it is possible to control the target device as desired, and thus it is possible to reliably operate the target device. Therefore, in security gate devices, personal computers, register devices, portable terminal devices, etc., users When (user, administrator) is separated from those devices and systems, it can be used and widely used in the security field where unauthorized use by others can be prevented.

  DESCRIPTION OF SYMBOLS 1 ... Wireless transmitter, 2 ... Wireless receiver (wireless communication apparatus), 3 ... Security gate apparatus (gate apparatus), 10 ... Housing case, 11 ... Gate housing, 12 ... Opening / closing flapper, 20 ... Antenna, 30 ... Transmission Module, 31 ... Signal processing circuit, 32 ... High frequency circuit, 40 ... Power source, 41 ... Solar cell (power generation element), 42 ... Secondary battery (power storage device), 43 ... Charging circuit, 50 ... Wireless module (first module) Wireless module), 60 ... housing, 70 ... radio module (second wireless module), 71 ... antenna, 72 ... high frequency circuit, 73 ... signal processing circuit, 73a ... infrared detection circuit, 73b ... radio line signal receiving circuit, 74 ... Infrared sensor, 100 ... Wireless communication system, D ... Sensing area, S ... Component mounting board, Sa, Sb ... Board.

Claims (10)

A radio communication device comprising a signal processing circuit, a high frequency circuit, and a signal processing circuit for receiving a signal transmitted from a radio transmitter having an antenna element, a high frequency circuit, and a radio receiver having an antenna element,
An infrared sensor provided in or around the antenna area defined by the antenna element of the radio receiver and constituting a part of the whole antenna of the radio receiver together with the antenna element; With
The entire antenna of the radio receiver state, and are not directed against the sensing area direction of the infrared sensor,
Following formula (1);
h / A ≧ 0.5 (1),
h: height of the infrared sensor,
A: the length of the short side of the plane of the antenna area defined by the antenna element in the radio receiver;
Satisfy the relationship represented by
Wireless communication device. The signal processing circuit of the wireless receiver includes an infrared detection circuit connected to the infrared sensor, the infrared detection circuit, and a wireless signal reception circuit connected to an antenna element of the wireless receiver. ,
The wireless signal receiving circuit operates based on a detection signal from the infrared detection circuit,
The wireless communication device according to claim 1. The whole antenna of the radio receiver has directivity in a direction intersecting with the plane of the antenna area defined by the antenna element of the radio receiver.
The wireless communication device according to claim 1 or 2. The overall antenna of the radio receiver has a higher sensitivity on one side of the plane of the antenna area defined by the antenna elements of the radio receiver than on the other side of the plane of the antenna area.
The wireless communication device according to any one of claims 1 to 3. The whole antenna of the wireless receiver has higher sensitivity on the component mounting surface side of the wireless receiver than the sensitivity on the opposite surface side of the component mounting surface of the wireless receiver.
The wireless communication device according to any one of claims 1 to 3. The infrared sensor has a metal casing provided with an infrared detection window.
The wireless communication device according to any one of claims 1 to 5 . A radio transmitter having a signal processing circuit, a high-frequency circuit, and an antenna element;
A signal processing circuit for receiving a signal transmitted from the wireless communication device, a high-frequency circuit, and a wireless receiver having an antenna element;
An infrared sensor provided in or around the antenna area defined by the antenna element of the radio receiver and constituting a part of the whole antenna of the radio receiver together with the antenna element; With
The entire antenna of the radio receiver state, and are not directed against the sensing area direction of the infrared sensor,
Following formula (1);
h / A ≧ 0.5 (1),
h: height of the infrared sensor,
A: the length of the short side of the plane of the antenna area defined by the antenna element in the radio receiver;
Satisfy the relationship represented by
Wireless communication system. A signal processing circuit, a high-frequency circuit, and a signal processing circuit for receiving a signal transmitted from a wireless transmitter having an antenna element, a high-frequency circuit, and a wireless receiver having an antenna element;
An infrared sensor provided in or around the antenna area defined by the antenna element of the radio receiver and constituting a part of the entire antenna of the radio receiver together with the antenna element; And
The entire antenna of the wireless receiver has directivity in the direction of the sensing area of the infrared sensor,
Following formula (1);
h / A ≧ 0.5 (1),
h: height of the infrared sensor,
A: the length of the short side of the plane of the antenna area defined by the antenna element in the radio receiver;
Satisfy the relationship represented by
A gate device having a side wall provided with the wireless receiver;
Wireless communication system. The wireless receiver is provided below the height center of the side wall of the gate device,
The wireless communication system according to claim 8. A plurality of the wireless receivers,
The plurality of wireless receivers are installed such that the sensing areas of the infrared sensors overlap.
The wireless communication system according to claim 8 or 9 .

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