JP2008217519A - Security system, and radio magnetic sensor used therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a security system capable of simplifying wiring, and capable of enhancing the attractiveness of an appearance. <P>SOLUTION: This security system is provided with magnets 6, 8 arranged fixedly in window 2, 4 sides, radio magnetic sensors 10, 12 arranged fixedly in positions capable of detecting magnetisms generated by the magnets 6, 8 in closed positions of the window 2, 4, and for transmitting a signal concerned in non-detection of the magnetism by a specified low-power radio wave, a radio receiver 16 for receiving the signal transmitted from the radio magnetic sensors 10, 12, by the specified low-power radio wave, and security operation devices 18, 20 security-operated in response to an output from the receiver. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a security system that detects intrusion from a window, a door, or the like, and relates to a magnetic sensor for use in this security system.

  Japanese Patent Application Laid-Open No. 2005-209063 and the like propose a security system that wirelessly communicates with a sensor terminal installed in a house or the like, detects an intruder, and notifies the intruder. Japanese Patent Application Laid-Open No. 2004-135197 proposes a sensor that monitors opening / closing of a window and transmits a detection signal using a radio wave when the opening / closing of the window is detected. As described above, many techniques using sensors have been proposed for security. And several techniques using a magnetic sensor as such a security sensor have been proposed in Japanese Patent Application Laid-Open No. 2004-171134.

  However, none of the security techniques using a magnetic sensor transmit the magnetic sensor output wirelessly. Therefore, in any case, it is necessary to route the output of the magnetic sensor by wiring, and it is difficult to adopt it in a place where wiring is difficult. In particular, when a magnetic sensor is attached to a window or door, the wiring can be visually observed through the window glass, and the appearance is not good. On the other hand, for example, if a magnetic sensor is provided with a window-side magnet and a magnetic sensor such as a magnetic response reed switch is provided on the window frame side, the opening / closing of the window can be detected simply and inexpensively.

Therefore, it is conceivable to transmit the magnetic sensor output wirelessly. For example, when there are a large number of windows and doors, such as a house, if the detection signals are transmitted wirelessly from a large number of magnetic sensors arranged in them, interference will occur. It may occur.
JP2005-209063 JP 2004-135197 A JP 2004-171134 A

  The problem to be solved by the present invention is that when an intrusion from a window or door is detected using a magnetic sensor, the sensor output can be transmitted to the receiving side without wiring, and a large number of magnetic sensors are provided on these windows and doors. Then, even if sensor outputs are transmitted wirelessly from them, it is possible to construct a system with high security so that they can be received without interference.

  A security system according to the present invention includes a magnetic generator fixedly installed on an opening / closing body side such as a window or a door, and a fixed deployment at a position where the magnetism generated by the magnetic generator can be detected corresponding to the opening / closing position of the opening / closing body. And a radio magnetic sensor that transmits a signal related to the detection by a specific low power radio, a radio receiver that receives a signal transmitted by the radio magnetic sensor by a specific low power radio, and a response to an output of the radio receiver And a security operating device that operates in a secure manner.

  Preferably, the wireless magnetic sensor is fixedly arranged at a position where the magnetism generated by the magnetic generator can be detected at different levels between a closed position of the opening / closing body and a position other than the closed position.

  The wireless magnetic sensor is disposed at a position far from the magnetic generator at the closed position of the opening and closing body and cannot detect the magnetism generated by the magnetic generator at a predetermined level or more, but at a position other than the closed position, the magnetism is not detected. It may be fixedly arranged at a position where the generator can approach and the magnetism can be detected at a predetermined level or more by the degree of approach.

  The wireless magnetic sensor is not limited to being provided in a one-to-one relationship with a magnetic generator such as a magnet, and may be provided in a N: M relationship.

  The magnetism generator is not limited to a magnet, and may be configured to generate magnetism in response to opening / closing of an open / close body, for example, and the wireless magnetic sensor may be capable of responding to detection of the generated magnetism. Good. For example, the magnetism generator may energize the coil in accordance with the opening / closing of the opening / closing body and generate magnetism from the coil.

  The opening / closing body is not limited to a window or a door that partitions the inside and outside of the house, and may include a window, a door, a shoji, a fence, and the like provided inside the house. In addition, the opening / closing body is not limited to a house, and may include an opening / closing body such as a window or a door provided in any structure such as a warehouse or a cabin.

  According to the present invention, a magnet is provided, for example, as a magnetic generator on the window side that is an opening / closing body, and the magnetism generated by the magnet can be detected when the window is closed on the window frame side, for example. When the wireless magnetic sensor is provided at a position where the magnetism cannot be detected, when the window is opened, the wireless magnetic sensor cannot detect the magnetism of the magnet, and wirelessly transmits it to the wireless reception device. In this case, since it transmits by specific low-power radio, it does not interfere with transmission signals of other wireless magnetic sensors, and even when there is interference radio, the wireless reception device receives the detection signals of the wireless magnetic sensors. Can do. And in this security system, there is no need to route the magnetic sensor output by wiring, so it can be adopted even in places where wiring is difficult, and when a magnetic sensor is attached to a window or door, there is no wiring, so The appearance is good.

  Preferably the security activation device is a ringing device. When a wireless magnetic sensor detects that a window has been opened, and when a detection signal from the wireless magnetic sensor is received by a receiving device, a ringing device such as a buzzer sounds, thereby opening the window or the like by an intruder. Can know.

  Preferably, the security operating device is a programmable controller that performs a reporting operation in response to an output of the receiving device. When the wireless magnetic sensor detects that the window has been opened and the detection signal of the wireless magnetic sensor is received by the receiving device, the programmable controller drives an external device such as a buzzer in response to the received output, or the management center. Can be notified, and security can be achieved.

  The wireless magnetic sensor according to the present invention is fixedly arranged at a position where the magnetism generated by the magnetism generating device can be detected corresponding to the opening / closing position of the opening / closing body, and security is provided together with the magnetism generating device and the radio receiving device. It is characterized by constituting a set.

  According to the present invention, when an intrusion from a window or door is detected using a magnetic sensor, the sensor output can be transmitted to the receiving side without wiring, and a large number of magnetic sensors are provided in these windows and doors. Even if the sensor output is transmitted wirelessly, a highly secure system can be constructed so that it can be received without interference.

  Hereinafter, a security system according to an embodiment of the present invention will be described with reference to the drawings. In the embodiment, a window is cited as an opening / closing body to be secured, but the present invention is not limited to this and can be applied to doors and other opening / closing bodies. FIG. 1 shows a schematic configuration of a security system, and this security system is provided with a pair of left and right windows 2 and 4 (opening and closing bodies) that are pulled back by openings provided in a house. In these two windows 2 and 4, magnets 6 and 8 as magnetism generators are fixed to the left window 2 and the right window 4 in the figure, respectively, and on the left and right window frame 9 side facing each of these magnets 6 and 8 one-to-one. The wireless magnetic sensors 10 and 12 are fixed. The fixed position of the wireless magnetic sensors 10 and 12 is not limited to the window frame, and it is sufficient that the magnetism generated by the magnets 6 and 8 can be detected while the windows 2 and 4 are closed.

  When both the windows 2 and 4 are closed, the left and right magnets 6 and 8 and the wireless magnetic sensors 10 and 12 face each other, and the wireless magnetic sensors 10 and 12 have a predetermined level of magnetism generated by the magnets 6 and 8. For example, when the right window 4 is opened as shown in the drawing, the magnet 8 moves away from the wireless magnetic sensor 12 on the right side, so that the magnetism generated by the magnet 8 can be detected at a predetermined level or more. become unable. The level of magnetism generated by the magnet 8 that can be detected by the wireless magnetic sensor 12 varies depending on the degree of opening of the right window 4. In this case, the wireless magnetic sensor 12 on the right side transmits a signal indicating that the window 4 is opened or a signal indicating the degree of opening of the window 4 to the wireless reception device 16 of the control panel 14 by specific low power wireless. ing.

  The control panel 14 includes the wireless reception device 16, a buzzer 18 that is a sounding device connected to the wireless reception device 16 by wire, and a control device 20 including a programmable logic controller.

  The wireless receiving device 16 transmits a signal indicating that the magnetism generated by the magnet 8 from the wireless magnetic sensor 12 cannot be detected or that the level of magnetism that can be detected is reduced, for example, an intruder is in the house or tries to enter. A transmission signal indicating that a person is present is received by the specific low-power radio, and the reception signal is output to the buzzer 18 and the control device 20. The buzzer 18 rings in response to the input of the received signal, and the control device 20 performs a notification operation to a security management center (not shown). The buzzer 18, the control device 20, the security management center and the like are referred to as a security operation device. The wireless magnetic sensors 10 and 12 constitute a security set together with the magnets 6 and 8, the wireless reception device 16, the buzzer 18, and the control device 20.

  The configuration of the wireless magnetic sensor 12 will be described with reference to FIG. The wireless magnetic sensor 10 and other wireless magnetic sensors have the same configuration. The wireless magnetic sensor 12 includes a magnetic detection unit 22 that detects the magnetism generated by the magnet 8, and a circuit unit 24 that processes the detection signal of the magnetic detection unit 22 into a form of a detection signal including a transmission ID code that can be wirelessly transmitted. , An antenna 26 for transmitting a signal related to the processing of the circuit unit 24, a power switch 28, and a battery power source 30.

  The magnetic detection unit 22 includes a reed switch (magnetic switch) in which a set of lead pieces made of a magnetic material is sealed in a glass tube together with an inert gas.

  The circuit unit 24 is a specific low-power radio that is stipulated in Article 6 of the Radio Law Enforcement Regulations. The circuit unit 24 stores a CPU 32a that performs calculation of the detection signal of the magnetic detection unit 22 and other controls, an ID code, and the like. A microcomputer 32 comprising a RAM 32b and a ROM 32c storing a control program, and output data (transmission carrier, ID code, detection signal) from the microcomputer 32 are input, and the ID code and detection output are input by the carrier. A radio processing unit 34 that generates a transmission signal by modulation, and a dip switch 36 as a channel adjustment unit that adjusts a channel to be used in advance with the radio reception device 16 from a combination of n channels of transmission frequencies in a specific low power radio . Power is supplied from the battery power supply 30 to the magnetic detection unit 22 and the circuit unit 24. .

  The wireless transmission in the wireless processing unit 34 is based on a specific low power wireless communication system. The specific low-power wireless communication uses a frequency band defined by the Radio Law (for example, 42.025 to 426.1375 band 10 waves, 429.250 to 4297375 band 40 waves), and its transmission intensity is 1 mW and 10 mW, respectively. Further, in this transmission, carrier sense for confirming whether or not the same radio wave is used before transmission in order to prevent radio wave interference with each other in a predetermined frequency band is not obligatory for the 10 waves of 1 mW, and the 40 Mandatory at 10 mW. That is, before transmission, a frequency scan of the use frequency band is performed to check whether the same radio wave is present in the surroundings. If a frequency exists, the frequency shifts to another frequency, and if there is no frequency interference, transmission is performed at that frequency. Therefore, they can prevent mutual transmission signals and radio wave interference. A transmission signal from the wireless processing unit is radiated from the antenna to the air in the form of a radio wave.

  The wireless reception device 16 will be described with reference to FIG. The wireless receiver 16 includes an antenna 40 that captures radio waves transmitted from the antenna 26 of the wireless magnetic sensor 12, a switch 42 that switches between transmission and reception, a filter 44, processing of detection signals received by the antenna 40, and the antenna 40. A transmission / reception processing unit 46 for performing transmission processing for transmitting data, a microcomputer 48 for overall control, a dip switch 50 for adjusting a reception frequency, and an output unit 52.

  The microcomputer 48 includes a CPU 48a that performs arithmetic control, a RAM 48b that stores data such as an ID code, and a ROM 48c that stores a control program. Power is supplied from the DC power supply unit 54 to each circuit unit in the wireless reception device 16.

  When the switch 42 is switched to the receiving side, the wireless receiving device 16 selects a specific low-power radio wave from a signal received via the antenna 40, demodulates it, obtains sensor data including an ID code, Input to computer 48. In this case, the reception frequency data adjusted by the DIP switch 50 is given from the microcomputer 48 to the transmission / reception processing unit 46, and the above demodulation is performed by this reception frequency.

  In addition, with reference to FIG. 4, when the detection signal from the radio | wireless magnetic sensor 12 (a code | symbol is represented by 12) is managed and security is carried out to each of several houses with one radio | wireless receiver 16, Each of the houses Ga, Gb,... Includes a plurality of wireless magnetic sensors that perform specific low-power wireless communication and a pair of magnets.

  The transmission frequency of each wireless magnetic sensor 12 in the house Ga is f1, the transmission frequency of each wireless magnetic sensor 12 in the house Gb is f2, and so on. Thus, the transmission frequency of each wireless magnetic sensor 12 in the same house Ga, Gb... Is the same. Moreover, each wireless magnetic sensor 12 in the same house Ga, Gb... Has a different ID code.

  The wireless receiving device 16 is set to a frequency at which the transmission frequency of each of the wireless magnetic sensors 12 in the corresponding houses Ga, Gb,. In addition, the reception sensitivity of the radio | wireless receiver 16 which receives the transmission frequency from the radio | wireless magnetic sensor 12 in one house Ga, Gb ... is adjustable. Further, in the same house, it is preferable that the wireless magnetic sensors 12 be installed apart from each other so as not to interfere with the signal of the transmission frequency.

  As described above, in the embodiment, when the magnetic magnetism generated by the magnets 6 and 8 cannot be detected by the wireless magnetic sensors 10 and 12, a signal indicating this is transmitted to the wireless reception device 16 and the wireless reception device 16. Since the buzzer 18 and the control device 20 respond in response to the output, it is possible to improve security when going out and the like, and there is no wiring in windows and doors, so that the appearance of the appearance is improved, and security equipment is constructed. Construction cost is low.

FIG. 1 is a diagram showing a schematic configuration of a security system according to an embodiment of the present invention. FIG. 2 is a block circuit diagram of a wireless magnetic sensor used in the security system of FIG. FIG. 3 is a block circuit diagram of a wireless receiver used in the security system of FIG. FIG. 4 is a diagram for explaining a transmission / reception configuration between the wireless magnetic sensor and the wireless receiver.

Explanation of symbols

2,4 windows (opening and closing body)
6,8 Magnet (Magnetic generator)
10, 12 Wireless magnetic sensor 14 Control panel 16 Wireless receiver 18 Buzzer (security operation device)
20 Control device (security actuator)

Claims (3)

  A magnetic generator fixedly arranged on the opening / closing body side such as a window or a door, and a signal related to the detection fixedly arranged at a position where the magnetism generated by the magnetic generation apparatus can be detected corresponding to the opening / closing position of the opening / closing body A wireless magnetic sensor that transmits a signal transmitted from the wireless magnetic sensor, a wireless receiver that receives a signal transmitted by the wireless magnetic sensor, and a security operation device that performs a security operation in response to an output of the wireless receiver A security system comprising:   The wireless magnetic sensor is fixedly arranged at a position where the magnetism generated by the magnetism generating device can be detected at different levels between a closed position of the opening / closing body and a position other than the closed position. The security system according to claim 1.   The wireless magnetic sensor used in the security system according to claim 1, wherein the magnetism generated by the magnetism generator is fixed to the open / close body side such as a window or a door. A wireless magnetic sensor characterized in that the wireless magnetic sensor is fixedly installed at a position where detection can be performed in accordance with the above-described configuration, and a signal related to the detection can be transmitted by specific low-power radio.

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