JP2008176500A - Crime prevention system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To usefully and effectively utilize limited power supply capacity of a detection sensor. <P>SOLUTION: The detection sensor 10<SB>n</SB>transmits a state check signal for inquiring the operating state of a crime prevention receiver 20 at every first prescribed time to the crime prevention receiver 20 as a wireless signal while ringing an alarm sound, and after transmitting a detection signal or after transmitting the state check signal at every first prescribed time, controls power supply so as to supply power to all function parts which receive a state signal transmitted from the crime prevention receiver 20 as the wireless signal only for second prescribed time shorter than the first prescribed time. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a security system that detects a certain abnormal state and executes a security process according to a detection result.

  In order to prevent illegal intrusions into the building from the outside, the security sensors that receive alarms by receiving detection signals (sensors) installed on doors, windows, etc. and wireless signals transmitted from detection sensors that detect intrusions A crime prevention system including a device (wireless crime prevention receiver) has been devised and implemented (see, for example, Patent Document 1).

JP 2005-173837 A

  In such a security system, in response to the detection of a certain abnormal state by the detection sensor, an alarm sound is emitted from the security receiver to notify the resident of the abnormal state, and the detection sensor also generates an alarm sound. The intruder can be threatened by ringing. Once the alarm sound is sounded by the security receiver and detection sensor, in order to stop the alarm sound, the resident will bother to visit the security receiver and detection sensor installed at different locations. It was necessary to perform a sound stop operation.

  Therefore, a stop signal is sent to stop the alarm sound on the detection sensor side in response to the stop operation on the security receiver side, in order to eliminate the nuisance of going to different installation locations to stop the alarm sound. A configuration is possible.

  However, with such a configuration, the detection sensor that is powered by the built-in battery needs to constantly supply power to the signal receiving unit that receives the stop signal while the alarm sound is sounding. Therefore, there is a problem that the life of a battery having a limited power supply capability is shortened in a short time.

  Therefore, the present invention has been devised to solve the above-described problems, and can easily stop the alarm sound of the security receiver and the detection sensor without performing a troublesome operation. An object of the present invention is to provide a crime prevention system that can effectively utilize the limited power supply capability of a detection sensor without waste.

  The crime prevention system of the present invention operates when a detection sensor that transmits a detection signal as a wireless signal in response to detection of some abnormal state by the detection means and a detection signal transmitted by the detection sensor. In a security system comprising a security receiver for notifying that an abnormal state has occurred according to the status, the detection sensor transmits a status confirmation signal as a radio signal that inquires the security receiver about the operating status of the security receiver. A state confirmation signal transmitting means, a state signal receiving means for receiving a state signal transmitted as a radio signal from the crime prevention receiver as a response signal of the detection signal or the state confirmation signal, and the state signal receiving means In response to the received status signal, sounding means for sounding an alarm sound and the status signal receiving means In response to the state signal, a ringing stop means for stopping the ringing of the alarm sound that is ringing, and the state confirmation signal is transmitted as a radio signal every first predetermined time while the alarm sound is sounded by the ringing means Shorter than the first predetermined time after the detection signal is transmitted, or after the state confirmation signal is transmitted at every first predetermined time by the control of the transmission control means. Power supply control means for controlling power supply to the state signal receiving means for a second predetermined time is provided to solve the above-described problem.

  Further, in the security system of the present invention, the power supply control means of the detection sensor receives the status signal transmitted as a radio signal from the security receiver by the status signal receiving means. The above-described problem is solved by controlling the power supply to the previous state signal receiving unit to stop without waiting for the elapse of a predetermined time.

  Furthermore, in the security system of the present invention, the transmission control means of the detection sensor receives the status signal transmitted as a radio signal from the security receiver by the status signal receiving means, and then the first predetermined time period. The above-described problem is solved by controlling the state confirmation signal to be transmitted as a radio signal after the first predetermined time has elapsed since the start of time measurement.

  According to the present invention, the alarm sound of the detection sensor can be stopped in response to the status signal transmitted as a radio signal from the security receiver, and the reception of the status signal transmitted from the security receiver can be stopped. Since it is not always necessary, the limited power supply capability of the power supply for supplying power to the detection sensor can be effectively utilized without waste, and the extension of the life of the power supply can be promoted.

  In addition, according to the present invention, the power supply capability of the detection sensor is limited by forcibly terminating the reception period of the state signal without waiting for the second predetermined time to elapse upon receiving the state signal. Can be effectively used without waste.

  Furthermore, according to the present invention, even when a plurality of detection sensors are activated, the transmission timing for transmitting the status confirmation signal is measured after receiving the status signal transmitted from the security receiver. Since it is after a predetermined time, it is possible to avoid collision of state confirmation signals transmitted from the respective detection sensors.

  Embodiments of the present invention will be described below with reference to the drawings.

First, the crime prevention system 1 shown as embodiment of this invention is demonstrated using FIG. The security system 1 includes a plurality of detection sensors 10 _n (n is a natural number) and a security receiver 20 that can wirelessly communicate with the detection sensors 10 _n in two directions using a predetermined frequency band. .

The detection sensor 10 _n transmits a radio signal to the security receiver 20, receives an antenna 11 that receives a radio signal transmitted from the security receiver 20, a radio transmission / reception unit 12, and a carrier wave having a predetermined frequency based on the data to be transmitted. modulation, a modem part 13 for taking out and demodulates the data modulated on the received radio signal, a signal processing section 14 for centrally controlling the detection sensor 10 _n, uniquely identifying at least the sensor 10 _n A data storage unit 15 that stores identification information to be detected, a sensor unit 16 that detects an intruder, a power supply control unit 17, and a power supply to each functional unit of the detection sensor 10 _n according to the control of the power supply control unit 17. A power source 18 such as a battery for supplying the sound and an acoustic unit 19 for sounding an alarm sound threatening the intruder.

Since the detection sensor 10 _n having such a configuration has a small shape and incorporates a power source 18 such as a battery, it can be installed in various places inside and outside various buildings including a house. The place where the detection sensor 10 _n is installed is determined by the sensing method of the sensor unit 16.

  The sensor unit 16 is a sensor that can detect any abnormal state in the management jurisdiction area, such as the presence of an intruder that has illegally entered the building or the area surrounding the building that is managed by the security system 1. For example, a magnet sensor (open / close sensor) that indirectly detects the presence of an intruder by detecting opening / closing of a window or door (door), or a temperature difference between the temperature of an object and the temperature of a person A heat ray sensor or the like that directly detects the presence of an intruder can be used.

As described above, the detection sensor 10 _n is installed in a window, a door (door) or the like when a magnet sensor is used as the sensor unit 16, and a building wall when a heat ray sensor is used. It will be installed on the ceiling.

The signal processing unit 14 detects the detection sensor 10 stored in the data storage unit 15 when the sensor unit 16 detects the presence of an intruder who has illegally entered the management jurisdiction area of the security system 1. _The identification information that uniquely identifies _n is read, the power control unit 17 is controlled, the power supply to the radio transmission / reception unit 12 and the modulation / demodulation unit 13 is started, and the radio transmission / reception unit 12 and the modulation / demodulation unit 13 are further controlled. Then, a detection signal which is a wireless signal with the read identification information attached is transmitted to the security receiver 20 via the antenna 11.

In addition to the detection signal, the signal processing unit 14 controls the security receiver 20 to transmit a state confirmation signal for inquiring about the operation state of the security receiver 20 as a radio signal. The signal processing unit 14 reads out the identification information that uniquely identifies the detection sensor 10 _n stored in the data storage unit 15 every first predetermined time while the alarm unit 19 is sounding the alarm sound, The power supply control unit 17 is controlled to start supplying power to the wireless transmission / reception unit 12 and the modem unit 13, and further, the wireless transmission / reception unit 12 and the modem unit 13 are controlled so that the read identification information is attached to the wireless signal. A certain state confirmation signal is transmitted to the security receiver 20 via the antenna 11.

As will be described in detail later, the security receiver 20 that has received this state confirmation signal, as a response signal to the state confirmation signal, operates the security receiver 20 in the operation state (operation mode: non-warning mode, warning mode, alarm). A state signal for notifying (mode) is transmitted as a radio signal. In addition, even when the security receiver 20 receives a detection signal transmitted from the detection sensor 10 _n, it transmits, as a response signal to the detection signal, a state signal that notifies the operation state of the security receiver 20 as a radio signal. To do.

As described above, each functional unit of the detection sensor 10 _n is supplied with power by the power source 18 that is a battery. The amount of power supplied to the wireless transmission / reception unit 12 and the modulation / demodulation unit 13 involved in transmission / reception of wireless signals is very large, and the amount of power stored in the power supply 18 is greatly reduced.

  Therefore, the signal processing unit 14 transmits the state confirmation signal every first predetermined time as described above. After transmitting the state confirmation signal, the signal processing unit 14 is extremely shorter than the first predetermined time, and the detection signal and the state confirmation signal are transmitted. Power to all functional units related to reception of radio signals, such as the radio transmission / reception unit 12 and the modulation / demodulation unit 13, for a second predetermined time sufficient to receive a status signal that is a response signal from the security receiver 20 The power supply control unit 17 is controlled so as to supply. Thereby, the limited power supply capability of the power source 18 can be effectively utilized without waste.

  In addition, the signal processing unit 14 supplies power to all functional units related to reception of wireless signals such as the wireless transmission / reception unit 12 and the modulation / demodulation unit 13 for a second predetermined time after transmitting the detection signal. The power supply control unit 17 is controlled. Thereby, the limited power supply capability of the power source 18 can be effectively utilized without waste.

The signal processing unit 14 is an identification attached to the radio signal demodulated by the modem unit 13 in response to the radio signal received from the security receiver 20 and received via the antenna 11 and the radio transceiver unit 12. The information is compared with the identification information that uniquely identifies the detection sensor 10 _n stored in the data storage unit 15, and it is determined whether or not it is a radio signal transmitted to itself.

  When the identification signals match, the signal processing unit 14 determines that the signal is a radio signal transmitted to itself, and executes processing according to the command request for the transmitted radio signal.

  Specifically, when the signal processing unit 14 receives a state signal notifying the operation state of the security receiver 20 transmitted as a response signal from the security receiver 20 that has received the detection signal and the state confirmation signal, In response to the signal, the sound unit 19 is controlled to sound an alarm sound, or the alarm sound that is already sounding is stopped.

The detection sensor 10 _n has a threatening function that threatens an intruder when the operation state of the security receiver 20 notified by the status signal transmitted from the security receiver 20 is in an alarm mode. As shown in FIG. 1, the detection sensor 10 _n includes an acoustic unit 19 and threatens an intruder by emitting a threatening sound (a threatening message) from the acoustic unit 19 when the above-described conditions are satisfied. Can do.

Incidentally, intimidation functions of the sensor 10 _n is, because the it is enough to intimidate intruders present in the vicinity of the sensor 10 _n, is limited to the sound unit 19 to emit rattling sounds as described above For example, a lamp or a mechanical mechanism that emits strong light may be used.

As shown in FIG. 1, security receiver 20 transmits a radio signal to the sensor 10 _n, the antenna 21 for receiving radio signals transmitted from the sensor 10 _n, a wireless transceiver unit 22, the data to be transmitted A modulation / demodulation unit 23 that modulates a carrier wave of a predetermined frequency and demodulates and extracts data modulated into a received radio signal; a signal processing unit 24 that comprehensively controls the security receiver 20; and a security system 1 A data storage unit 25 that stores identification information of all the detection sensors 10 _n , an operation unit 26 such as a push button for operating various functions of the security receiver 20, and a display unit 27. And an acoustic unit 28 that rings in response to reception of a detection signal transmitted from the detection sensor 10 _n and notifies a person in the vicinity that an intruder has been detected.

The crime prevention receiver 20 having such a configuration is a large device as compared with the detection sensor 10 _n . For example, the display unit 27 is easily visible at a predetermined place in the building, and the operation unit 26 is operated. It will be fixedly installed at an easy position. Therefore, a fixed power source is used as the power source.

The display unit 27 is, for example, a light emitting element such as an LED (Light Emitting Diode), a light emitting lamp, or the like. The display unit 27 changes the display form in accordance with the lighting, extinction, and blinking control by the signal processing unit 24 when a wireless signal transmitted from the detection sensor 10 _n is received or when the operation unit 26 is operated. Thus, the signal reception status, operation status, etc. are visually presented to the user. For example, when a detection signal transmitted from the detection sensor 10 _n is received, a light-emitting lamp that specifies a detection area where an intruder can be detected by the installation of the detection sensor 10 _n blinks, and the intruder The user is notified of the position of.

  The display unit 27 may be of any type as long as the user can glance at the display result. For example, an LED that can emit red light, green light, and blue light is used. By changing the combination, the display form can be changed in the same manner as the above-described extinguishing, lighting, and blinking. In addition to such LEDs, for example, a small and thin EL (Electric Luminescence) light emitting panel may be used. The display unit 27 may be a liquid crystal display that can display character information and image information.

Data storage unit 25, all the identification information of the sensor 10 _n constituting the security system 1, are stored in association with information capable of specifying a detection area set up a detection sensor 10 _n. The information that can specify the detection area is, for example, information that specifies the display unit 27 that is a light-emitting lamp associated with the detection area, or symbol information that is displayed on the display unit 27 that is a liquid crystal display or a light-emitting panel. Etc.

Thereby, from the identification information acquired from the detection signal transmitted from the detection sensor 10 _n , information associated with the data storage unit 25 is acquired and presented to the user via the display unit 27, so that the intruder It is possible to specify the detection area where the is detected.

The signal processing unit 24 is an identification attached to the detection signal demodulated by the modem unit 23 in response to the detection signal transmitted from the detection sensor 10 _n and received via the antenna 21 and the wireless transmission / reception unit 22. The information is compared with the identification information that uniquely identifies the detection sensor 10 _n stored in the data storage unit 25, the information stored in association with the information is read, and the acoustic unit 28 is caused to ring. Then, the signal processing unit 24 presents the detection area where the intruder specified by the read information is detected to the user via the display unit 27.

In addition, the signal processing unit 24 is acquired from each signal together with information indicating the current operation state of the security receiver 20 in response to receiving the detection signal or the state confirmation signal transmitted from the detection sensor 10 _n. A status signal, which is a response signal with identification information attached thereto, is generated and transmitted to the detection sensor 10 _n via the modem unit 23, the wireless transmission / reception unit 22, and the antenna 21. The detection sensor 10 _n that has received the status signal recognizes that it is a response signal addressed to itself by referring to the identification information attached to the status signal, and the current operation of the security receiver 20 from the information indicating the operating status. The state can be grasped.

  The security receiver 20 can set an operation mode of the security receiver 20 such as a non-warning mode and a warning mode for each detection area.

When the detection area is set to the non-warning mode, the security receiver 20 does not sound an alarm sound even if the detection signal transmitted from the detection sensor 10 _n installed in the detection area set to the non-warning mode is received. The non-warning mode is an operation mode in which the operation state of the security receiver 20 is set to a dormant state.

When the detection area is set to the warning mode, the security receiver 20 waits to sound an alarm sound when a detection signal transmitted from the detection sensor 10 _n installed in the detection area set to the warning mode is received. . The alert mode is an operation mode in which the operation state of the security receiver 20 is set to the standby state.

  The signal processing unit 24 further shifts the operation state of the security receiver 20 to the alarm mode in response to receiving the detection signal in the alert mode, and the sound unit 28 and the display unit 27 respectively generate an alarm sound (alarm message). ) And alarm display (for example, the red lamp lights up). The alarm mode is an operation mode showing an operation state when an alarm is sounded by the crime prevention receiver 20.

[Processing operation of security system 1]
Next, the processing operation of the crime prevention system 1 will be described using the timing charts shown in FIGS. 2-1 and 2-2.

First, as shown in Figure 2-1, in step S1, the security receiver 20 is in a idle state of waiting for detection signals transmitted from the detection sensor 10 _n.

In step S _< b _> 2, the detection sensor 10 _n is in a sleep state in which power is supplied to the sensor unit 16 by the power supply control unit 17 and only the sensing function of the intruder into the detection area by the sensor unit 16 is functioning. .

In step S _< b _{> 3} , the signal processing unit 14 of the detection sensor 10 _n determines whether or not an intruder has been detected by the sensor unit 16. If an intruder is detected, the signal processing unit 14 proceeds to step S4. If no intruder is detected, the signal processing unit 14 returns to step S2, and continues the above-described sleep state.

In step S4, the signal processing unit 14 of the sensor 10 _n controls the power control unit 17, wireless transceiver 12, a control to start the power supply to the functional unit related to the transmission of radio signals, such as modem part 13 To do.

In step S5, the signal processing unit 14 of the sensor 10 _n, in response to the intruder by the sensor unit 16 is detected, reads the identification information from the data storage unit 15, a detection signal with attached read identification information It is generated and transmitted to the security receiver 20.

  After transmitting the detection signal, the signal processing unit 14 controls the power supply control unit 17 for a second predetermined time in order to receive the status signal transmitted from the security receiver 20 as a response signal of the detection signal, Control is performed so that power is supplied to functional units related to reception of radio signals, such as the radio transceiver unit 12 and the modem unit 13.

In step S6, the signal processor 24 of the security receiver 20 determines whether it has received a detection signal transmitted from the sensor 10 _n. If the signal processing unit 24 receives the detection signal, the process proceeds to step S8. If the signal processing unit 24 fails to receive the detection signal, the signal processing unit 24 returns to step S1 and waits for reception of the detection signal. continue.

  In step S8, the signal processing unit 24 of the security receiver 20 determines whether or not the current operation mode is the alert mode. The signal processing unit 24 advances the process to step S9 when in the alert mode, and advances the process to step S20 in the non-alert mode that is an operation mode other than the alert mode.

  In step S9, the signal processing unit 24 of the security receiver 20 shifts to the alarm mode in response to the alarm mode, controls the acoustic unit 28 to sound an alarm sound, and controls the display unit 27. Display an alarm.

In step S10, the signal processing unit 24 reads the information indicating the current operation state of the security receiver 20 and the identification information attached to the received detection signal, and attaches the read identification information to the state signal. Is transmitted to the detection sensor 10 _n .

  In step S11, the signal processing unit 24 of the security receiver 20 determines whether an alarm stop operation has been performed by a resident who is a user. If the signal processing unit 24 determines that an alarm stop operation has been performed, the signal processing unit 24 proceeds to step S12. If the alarm stop operation is not performed, the signal processing unit 24 proceeds to step S20.

  In step S <b> 12, the signal processing unit 24 of the crime prevention receiver 20 cancels the alarm mode and controls the sound unit 28 to stop the sound of the alarm sound and the alarm display of the display unit 27.

In step S _< b _> 13, the signal processing unit 14 of the detection sensor 10 _n determines whether or not a state signal transmitted from the security receiver 20 has been received. If the signal processing unit 14 receives the state signal, the signal processing unit 14 proceeds to step S14. If the state processing signal is not received, the signal processing unit 14 enters a state signal reception standby state.

In step S7, the signal processing unit 14 of the sensor 10 _n, the operation mode of the security receiver 20 determines whether the alarm mode from the received status signals. When the operation mode of the security receiver 20 is the alarm mode, the signal processing unit 14 proceeds to step S14. When the operation mode is not the alarm mode, the signal processing unit 14 returns the process to step S2.

In step S14, the signal processing unit 14 of the sensor 10 _n is the threat according to the state signal transmitted from the security receiver 20, the intruder controlling the sound unit 19 is present in the vicinity of the sensor 10 _n A warning sound (intimidating sound) is started.

In step S15, the signal processing unit 14 of the sensor 10 _n, after the detection signal is transmitted, the wireless transceiver 12, power supply control to start the power supply to the functional unit related to the reception of radio signals, such as modem part 13 It is determined whether a second predetermined time has elapsed since the control of the unit 17. If the second predetermined time has elapsed, the signal processing unit 14 proceeds to step S16. If the second predetermined time has not elapsed, the signal processing unit 14 waits for the second predetermined time to elapse. Become.

In step S _< b _> 16, the signal processing unit 14 of the detection sensor 10 _n controls the power supply control unit 17 to stop the power supply to all the functional units related to reception of the radio signal.

In step S _< b _> 17, the signal processing unit 14 of the detection sensor 10 _n determines whether or not a first predetermined time has elapsed since the detection signal was transmitted or the state confirmation signal was transmitted in the previous processing step. When the first predetermined time has elapsed, the signal processing unit 14 proceeds to step S18. When the first predetermined time has not elapsed, the signal processing unit 14 returns to step S16 and is involved in reception of the radio signal. Continue to stop power supply to all functional units.

Step S18 odor, sensor 10 _n signal processing unit 14 of the controls the power control unit 17, wireless transceiver 12, a control to start the power supply to the functional unit related to the transmission of radio signals, such as modem part 13 To do.

In step S _< b _> 19, the signal processing unit 14 of the detection sensor 10 _n reads the identification information from the data storage unit 15, generates a state confirmation signal with the read identification information attached, and transmits it to the security receiver 20.

  After transmitting the state confirmation signal, the signal processing unit 14 controls the power supply control unit 17 for a second predetermined time in order to receive the state signal transmitted from the security receiver 20 as a response signal of the state confirmation signal. Thus, control is performed so as to supply power to functional units related to reception of radio signals, such as the radio transceiver unit 12 and the modem unit 13.

In step S20, the signal processing unit 24 of the security receiver 20 determines whether it has received a state confirmation signal sent from the detection sensor 10 _n. The signal processing unit 24 proceeds to step S22 when the state confirmation signal is received, and enters a standby state for waiting for reception of the state confirmation signal when the state confirmation signal is not received.

In step S21, the signal processing unit 24 of the security receiver 20 generates and detects a status signal attached with information indicating the current operation status of the security receiver 20 and identification information acquired from the status confirmation signal. Transmit to sensor _10n .

  In step S22, the signal processing unit 24 of the security receiver 20 determines whether or not the current operation state of the security receiver 20 is the alarm mode. If the signal processing unit 24 is in the alarm mode, the process returns to step S20 to continue the standby state of the state confirmation signal, while if not in the alarm mode, the process returns to step S1.

Subsequently, as shown in Figure 2-2, in step S23, the signal processing unit 14 of the sensor 10 _n determines whether it has received a status signal. The signal processing unit 14 proceeds to step S24 when the state signal is received, and proceeds to step S28 when the state signal is not received.

In step S24, the signal processing unit 14 of the sensor 10 _n refers to the status signal received by the current operating status of the security receiver 20 determines whether the alarm mode. If the signal processing unit 14 is not in the alarm mode, the process proceeds to step S25. If the signal processing unit 14 is in the alarm mode, the process proceeds to step S28.

In step S _< b _> 25, the signal processing unit 14 of the detection sensor 10 _n controls the sound unit 19 in response to the current operation state of the security receiver 20 being not in the alarm mode, and stops the sounding of the alarm sound.

In step S26, the signal processing unit 14 of the sensor 10 _n, after the state confirmation signal is transmitted at Step S19, the radio transmitting and receiving unit 12, the power supply to the functional unit related to the reception of radio signals, such as modem part 13 It is determined whether or not a second predetermined time has elapsed since the power supply controller 17 was controlled to start. If the second predetermined time has elapsed, the signal processing unit 14 proceeds to step S27. If the second predetermined time has not elapsed, the signal processing unit 14 enters a standby state in which the second predetermined time has elapsed. .

In step S _< b _> 27, the signal processing unit 14 of the detection sensor 10 _n controls the power supply control unit 17 to stop the power supply to all the functional units related to reception of the radio signal. When the signal processing unit 14 finishes the process of step S27, the process returns to step S2.

In step S28, the signal processing unit 14 of the sensor 10 _n, if case of not receiving the status signal, or the current operating state of the security receiver 20 from the received state signal was alarm mode, the alarm sound After the state confirmation signal is transmitted in step S19 without stopping the ringing, the power control unit 17 starts the power supply to the function units related to the reception of the radio signals such as the radio transmission / reception unit 12 and the modem unit 13. It is determined whether or not a second predetermined time has elapsed since the control of. If the second predetermined time has elapsed, the signal processing unit 14 proceeds to step S29. If the second predetermined time has not elapsed, the signal processing unit 14 enters a standby state in which the second predetermined time has elapsed. .

In step S29, the signal processing unit 14 of the sensor 10 _n controls the power supply control unit 17 stops the power supply to all of the functional unit related to the reception of the radio signal.

In step S _< b _> 30, the signal processing unit 14 of the detection sensor 10 _n determines whether or not a predetermined time has elapsed since the alarm sound is started to sound. The signal processing unit 14 controls the sound unit to stop the sounding of the alarm sound when a predetermined time for sounding the alarm sound has elapsed, and proceeds to step S2 while the predetermined time has elapsed for sounding the alarm sound. If not, the process returns to step S17.

As for the signal receiving step of the detection sensor 10 _n and the security receiver 20, if the standby state for receiving the signal continues for a predetermined time sufficiently longer than the first predetermined time and the second predetermined time, Is set to return to the sleep state.

Figure 3 is detected abnormal state by the sensor 10 _n is detected, the transmission and reception of signals of the detection sensor 10 _n and the security receiver 20 when security receiver 20 is set to alert mode is shifted to the alarm mode state It is the figure which showed an example.

As shown in FIG. 3, an abnormal condition is detected by the detection sensor 10 _n, detection signal P to the detection signal transmission period is transmitted. The security receiver 20 sounds an alarm sound in response to receiving the detection signal P transmitted from the detection sensor 10 _n .

The security receiver 20 transmits the state signal SS during the state signal transmission period in response to receiving the detection signal P transmitted from the detection sensor 10 _n . When this state signal transmission period elapses, it becomes a reception period of the state confirmation signal CS transmitted from the detection sensor 10 _n .

The detection sensor 10 _n sounds an alarm sound according to the state signal SS transmitted from the crime prevention receiver 20. After transmitting the detection signal P, the detection sensor 10 _n can receive the state signal SS transmitted from the crime prevention receiver 20 for the second predetermined time T2.

Further, the detection sensor 10 _n transmits the state confirmation signal CS every first predetermined time while the security receiver 20 is in the alarm mode. After transmitting the state confirmation signal CS, the detection sensor 10 _n can receive the state signal SS transmitted from the security receiver 20 for the second predetermined time T2.

Thereafter, each time the security receiver 20 receives the status confirmation signal CS transmitted from the detection sensor 10 _n, it transmits the status signal SS as a response signal. The detection sensor 10 _n stops the sounding of the alarm sound in response to the current operation state of the security receiver 20 indicated by the status signal SS transmitted from the security receiver 20 being out of the alarm mode. The transmission of the status confirmation signal CS that has been transmitted every predetermined time is stopped.

As described above, in the security system 1 shown as the embodiment of the present invention, the detection sensor 10 _n detects a certain abnormal state, transmits a detection signal, and sounds an alarm sound so as to threaten the intruder. During this period, the state confirmation signal is transmitted as a radio signal every first predetermined time, and after the detection signal is transmitted or after the state confirmation signal is transmitted every first predetermined time, the first confirmation time is shorter than the first predetermined time. 2. Control is performed so that power is supplied to all functional units that receive radio signals for a predetermined time.

Thereby, according to the state signal transmitted from the security receiver 20 as a radio signal, the alarm sound of the detection sensor 10 _n can be stopped and the reception of the status signal transmitted from the security receiver 20 is awaited. the reason not always need to be, the limited power supply capacity of the power supply source 18 to the sensor 10 _n can be utilized without waste effectively, can promote the life of the power source 18.

[Processing without waiting for second predetermined time]
Figure 2-1 Figure 2-2, as described with reference to FIG. 3, the detection sensor 10 _n of the security system 1, the detection signal, security receiver 20 from the state signal transmitted as a response signal of the state confirmation signal When it is determined that the current operation state is the alarm mode, a state confirmation signal is transmitted every first predetermined time, and after transmitting the state confirmation signal, as a response signal from the security receiver 20 for the second predetermined time. The power supply control unit 17 is controlled to supply power to all the functional units related to reception of the radio signal so that the transmitted status signal can be received. That is, the signal processing unit 14 controls the power supply control unit 17 so as to stop the power supply to all functional units related to reception of the radio signal after the second predetermined time has elapsed.

Further, the signal processing unit 14 of the detection sensor 10 _n receives all the signals related to the reception of the radio signal without waiting for the elapse of the second predetermined time in response to receiving the state signal transmitted from the security receiver 20. The power supply control unit 17 can also be controlled to stop the power supply to the functional unit. Accordingly, it is not necessary to wait for always elapse of the second predetermined time, the limited power supply capacity of sensor 10 _n of the power supply 18 can be used effectively without further waste.

Specifically, as shown in FIG. 4, the signal processing unit 14 of the detection sensor 10 _n transmits the detection signal P or during a period in which the security receiver 20 is in the alarm mode and is sounding an alarm sound. After the state confirmation signal CS is transmitted every first predetermined time T1, a reception period of the state signal SS is provided only for the second predetermined time T2, and this second predetermined time T2 is set to the state signal SS from the security receiver 20. Is forcibly terminated when received.

In the example shown in FIG. 3 described above, had provided a reception period always receives the second predetermined time T2 by the state signal SS, as shown in FIG. 4, the signal processing unit 14 of the sensor 10 _n, the state signal to force it to terminate the reception period of the state signal SS without waiting for the elapse of the second predetermined time T2 by receiving the SS, a limited power supply capacity of sensor 10 _n of the power supply 18, further waste It can be used effectively.

  The processing operation of the security system 1 at this time is the same as the flowchart shown in FIGS. 2-1 and 2-2 except that step S15 in FIG. 2-1, step S26 in FIG. 2-2, and step S28 are deleted. The other processing steps are exactly the same and will be omitted.

[Process for measuring the first predetermined time after receiving the status signal]
Since the security system 1 includes a plurality of detection sensors 10 _n , for example, when some abnormality is detected almost simultaneously with the plurality of detection sensors 10 _n , the first predetermined time is constant, so the security receiver 20 There is a possibility that the transmission timing of the state confirmation signal to be transmitted to will overlap each time, and the security receiver 20 will cause a malfunction due to the collision of the signals.

When receiving a plurality of detection signals and state confirmation signals, the security receiver 20 transmits a state signal addressed to each detection sensor 10 _{n at} different transmission timings. Therefore, the signal processing unit 14 of the detection sensor 10 _n starts timing until the first predetermined time is reached by the built-in timer after receiving the status signal from the security receiver 20, and after the first predetermined time has elapsed. The next status confirmation signal is transmitted. This is shown in FIG. As shown in FIG. 5, the detection sensor 10 _n starts counting the first predetermined time T1 after receiving the status signal SS transmitted from the security receiver 20, and after the first predetermined time T1 has elapsed, A state confirmation signal CS is transmitted.

As a result, even when the plurality of detection sensors 10 _n are activated, the transmission timing for transmitting the state confirmation signal is measured after receiving the state signals transmitted from the security receiver 20 at different transmission timings. Therefore, it is possible to avoid the collision of the state confirmation signals transmitted from the respective detection sensors _10n .

  The above-described embodiment is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and various modifications can be made depending on the design and the like as long as the technical idea according to the present invention is not deviated from this embodiment. Of course, it is possible to change.

It is a figure for demonstrating the structure of the crime prevention system shown as embodiment of this invention. It is a flowchart for demonstrating the processing operation of the said crime prevention system. It is a flowchart for demonstrating the processing operation of the said crime prevention system following the said FIG. It is the figure which showed the mode of the transmission / reception of the signal of a detection sensor and a crime prevention receiver when a crime prevention receiver transfers to alarm mode. It is a figure for demonstrating the process which does not wait for progress of 2nd predetermined time. It is a figure for demonstrating the process which time-measures 1st predetermined time after receiving a status signal.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Security system 10 _n detection sensor 12 Wireless transmission / reception part 13 Modulation / demodulation part 14 Signal processing part 15 Data storage part 16 Sensor part 17 Power supply control part 18 Power supply 19 Acoustic part 20 Security receiver 24 Signal processing part 27 Display part 28 Acoustic part

Claims (3)

A detection sensor that transmits a detection signal as a radio signal in response to detection of some abnormal state by the detection means, and an abnormal state that depends on its own operation state when the detection signal transmitted by the detection sensor is received. In a crime prevention system equipped with a crime prevention receiver that informs that
The detection sensor is a state confirmation signal transmitting means for transmitting a state confirmation signal as a radio signal for inquiring of the operation state of the security receiver to the security receiver,
Status signal receiving means for receiving a status signal transmitted as a radio signal from the crime prevention receiver as a response signal of the detection signal or the status confirmation signal;
In response to the status signal received by the status signal receiving means, sounding means for sounding an alarm sound,
In response to the status signal received by the status signal receiving means, ringing stopping means for stopping ringing of the alarm sound being ringed,
Transmission control means for controlling the state confirmation signal to be transmitted as a radio signal every first predetermined time while the alarm sound is sounded by the sounding means;
After the detection signal is transmitted, or after the state confirmation signal is transmitted every first predetermined time under the control of the transmission control means, the state signal is received for a second predetermined time shorter than the first predetermined time. A security system comprising power supply control means for controlling power supply to the means. The power supply control means of the detection sensor may receive the status signal transmitted as a radio signal from the security receiver by the status signal receiving means without waiting for the elapse of the second predetermined time. The security system according to claim 1, wherein control is performed to stop power supply to the status signal receiving means. The transmission control means of the detection sensor starts counting the first predetermined time after receiving a state signal transmitted as a radio signal from the security receiver by the state signal receiving means, and starts the first predetermined time. The crime prevention system according to claim 1, wherein after the elapse of time, the state confirmation signal is controlled to be transmitted as a radio signal.

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