JP4665349B2 - Wireless sensor system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a wireless sensor system.
[0002]
[Prior art]
As shown in FIG. 8, the conventional wireless sensor system includes a sensor unit 2 group that detects a state of a detection target in a monitoring area, various terminals 3, and a controller unit 4.
[0003]
The controller unit 4 includes a transmission / reception circuit unit 40 including a reception unit that receives detection information transmitted from the group of sensor units 21... And a transmission unit that transmits a control signal to various terminals 3 by radio signals. Main CPU 41 as signal processing means for performing processing and control processing, power supply circuit unit 42 for inputting commercial power and converting it to a predetermined voltage, battery power supply BT1 for backup, display circuit unit 43, and wired sensor unit Sensor input unit 44 for inputting detection information from 21..., Telephone line control CPU 45 for transmitting detection information and monitoring status information to a security company or the like via telephone line 5, various external information terminals 6 and RS− RS-485 CPU 46 for communication with a general-purpose standard such as 485, voice control / output unit 47 for controlling alarm sound output to the speaker SP, and an operation unit (not shown). The key input circuit unit 48 for inputting the key operation signal and the power supply voltage are monitored, and the reset state of the main CPU 41 is released when the power supply voltage rises from a state lower than a predetermined value to a predetermined value as when the power is turned on. The voltage monitoring reset circuit unit 49, a memory M1 for storing data and programs, and an antenna AT are included.
[0004]
The sensor unit 2 includes a human body heat detection sensor, an intrusion sensor, a glass breakage sensor, a gas sensor, a fire sensor, and other sensors for giving convenience to daily life. The configuration is basically as shown in FIG. A power supply circuit unit 20 for obtaining a predetermined voltage + V from the battery power source BT2, and a detection unit for detecting the state of the detection target in the monitoring area (for example, a human body heat detection sensor detects the heat rays of the human body. A detection unit corresponding to a detection target such as a human body heat detection unit) 21, a transmission circuit unit 22 that transmits the detected state of the detection target in the monitored region to the controller unit 4 as detection information by a radio signal, and a detection unit The CPU 23 as a signal processing unit that processes the detection signal 21 and transmits the signal as a radio signal from the transmission circuit unit 22 and the control process, and stores programs and data And Mori M2, the supply voltage monitor, a voltage monitoring reset circuit 24 the supply voltage to release the reset of the CPU23 exceeds a predetermined value from a predetermined value or less as at power-on, and a antenna AT1.
[0005]
On the other hand, the terminal 3 is controlled by, for example, a receiving circuit unit 30 that receives a control signal transmitted by a radio signal from the controller unit 4 and a control signal received by the receiving unit 30 as shown in FIG. A load (the terminal 3 in the case of FIG. 8 constitutes a buzzer box and a buzzer 31 is controlled as a buzzer 31) and an antenna AT2 are provided, and an operating power source is obtained from a commercial power source.
[0006]
Next, the operation of the conventional wireless sensor system will be described with reference to FIG.
[0007]
First, the controller unit 4 can switch and set two operation modes, a warning mode and a non-warning mode, through a key input circuit unit 48. Here, it is assumed that the mode is set to the alert state as shown in FIG.
[0008]
In this operation mode state, as shown in FIG. 10 (f), the detection unit 21 provided in the sensor unit 2 outputs a detection signal (a human body detection signal in the case of a human body heat detection unit) to the CPU 23. When the detection signal is input as shown in FIG. 10G, the CPU 23 determines whether or not an alarm is issued based on the detection signal (the presence or absence of a human body if the detection signal is from the human body heat detection unit). When it is determined that the alarm is to be generated, the determination output signal is output as shown in FIG. 10 (h). Upon receiving the determination output signal, the transmission circuit unit 22 receives the detection information by radio signal as shown in FIG. 10 (i). Send.
[0009]
The detection information sent by the radio signal is received by the transmission / reception circuit unit 40 of the controller unit 4 as shown in FIG. 10B and input to the main CPU 41. The main CPU 41 determines from the detection information that an abnormality has been detected by the sensor unit 2, and outputs a control signal as shown in FIG. 10 (c) so as to output an alarm sound to the sound control / output unit 47. The alarm sound is output from the speaker SP for a certain time as shown in FIG. At the same time, the detection information is reported to the security company through the telephone line 5 as shown in FIG. Further, the control information is transmitted by radio signal through the transmission / reception circuit unit 40 to the terminal 3 having the buzzer 31 as a load, and the buzzer 31 of the terminal 3 is sounded to generate an alarm sound.
[0010]
[Problems to be solved by the invention]
By the way, in the above-described conventional system, for example, even if a housekeeper who installed the system is at home and the controller unit 4 is switched to the non-warning mode as shown at timing t1 in FIG. The operation for detecting the state of the monitoring area is continued. That is, after the timing t1, as shown in FIG. 10 (f), when the detection unit 21 generates a detection signal in the same manner as described above, the CPU 23 inputs the detection signal (FIG. 10 (g)) and performs the determination process. Then, the determination output signal is output to the transmission circuit unit 22 as shown in FIG. 10 (h), and the transmission circuit unit 22 correspondingly transmits the detection information as a radio signal as shown in FIG. 10 (i). . On the other hand, in the controller unit 4 that has entered the non-warning mode, even if the transmission / reception circuit unit 40 receives the detection information from the sensor unit 2 as shown in FIG. Canceling (FIG. 10 (c)), no sound is generated from the speaker SP and the buzzer 31 is not sounded (FIG. 10 (d)), and no report is made to the security company (FIG. 10 (e)).
[0011]
Further, the sensor unit 2 does not output a detection signal from the detection unit 21 as shown in FIG. 11 (f), and even if the detection signal is not input to the CPU 23 as shown in FIG. h), a periodic notification signal is output from the CPU 23 to the transmission circuit unit 22 at a constant period, and the transmission circuit unit 22 responds to this periodic notification signal as shown in FIG. 11 (i). Information is transmitted to the controller unit 4. In the controller unit 4, when the transmission / reception circuit unit 40 receives the periodic notification information regardless of the operation mode as shown in FIG. 11B, the main CPU 41 receives the periodic notification information as shown in FIG. Recognizing this and storing it in the memory M1, and periodically or irregularly reporting the stored information to the security company as shown in FIG. Yes. That is, the sensor unit 2 can check the operation of the sensor unit 2 by periodically transmitting a radio signal. FIG. 11A shows the setting state of the warning / non-warning mode. In the example shown in FIG. 11, the setting is set to the non-warning mode. It should be noted that no audio output is output as shown in FIG.
[0012]
As described above, in the non-warning mode, the controller unit 4 cancels the processing even if it receives detection information from the sensor unit 2 and does not generate an alarm, but recognizes that the sensor unit 2 is set to the non-warning mode. For example, in the case of a human body heat detection sensor, the detection information is transmitted every time the human body passes through the monitoring area, so that the battery power supply BT2 is useless. There is a problem that the battery life is shortened due to the consumption of power depending on the sensor unit 2 due to large power consumption. There is also battery consumption due to the regular transmission described above.
[0013]
The present invention has been made in view of the above points, and the object of the present invention is to stop the unnecessary transmission operation of the sensor in the non-warning mode to eliminate unnecessary power consumption and to reduce the consumption of the battery power of the sensor. It is to provide a reduced wireless sensor system.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, according to the first aspect of the present invention, a first transmission / reception circuit unit that transmits / receives a radio signal, a detection unit that detects a state of a detection target, and information based on a detection signal of the detection unit Including a first signal processing means for transmitting a wireless signal from the first transmission / reception circuit unit, a first or a plurality of sensor units operating by a battery power source, and a second transmission / reception circuit unit for transmitting / receiving a wireless signal; A second signal processing unit that performs a determination process based on information from the sensor unit received by the second transmission circuit unit, and a warning mode in which an operation mode performs the determination process by the second signal processing unit, or In the wireless sensor system including the controller unit that is set to be switched to the non-warning mode that cancels the determination process, the second signal processing unit of the controller unit includes the above-described operation. When the mode is switched and set, the second transmission / reception circuit unit has a function of transmitting setting information by a radio signal, and the first signal processing means of the sensor unit receives the first transmission / reception circuit unit. The setting information from the controller unit has a function of stopping transmission of information based on the detection of the detection unit when the non-warning mode is set, and when the sensor unit is turned on, the first transmission / reception circuit unit of the sensor unit And a means for transmitting power-on information to the controller unit, and when the second transmission / reception circuit unit receives the power-on information transmitted from the sensor unit, a confirmation signal to the sensor unit is transmitted to the second transmission / reception unit. The controller unit has means for transmitting from the circuit unit, and the sensor unit that receives the confirmation signal from the controller unit sets the reception timing. As the period the reference timing, and sets the received gate signal to the first communication circuit unit as capable of receiving from the controller unit at every predetermined time from the synchronization reference timing.
[0016]
According to a second aspect of the present invention, in the first aspect of the invention, the sensor unit is configured to receive a signal from the controller unit at regular intervals each time a signal transmitted from the controller unit is received. The synchronization reference timing for setting the reception gate of the transmission / reception circuit section is set.
[0017]
According to a third aspect of the present invention, in the first aspect of the invention, the sensor unit sets a reception gate of the first transmission / reception circuit unit so as to be able to receive a signal from the controller unit at any given time. The synchronization reference timing to be set is set.
[0018]
The invention of claim 4 is characterized in that, in the invention of claim 3, a radio timepiece is used as the means for generating the arbitrary time.
[0019]
The invention of claim 5 is characterized in that, in the invention of claim 3 , GPS radio waves are used as means for generating the arbitrary time.
[0020]
According to a sixth aspect of the present invention, in the first aspect of the invention, the controller section transmits setting information from the second transmission / reception circuit section for an arbitrary time at an arbitrary transmission on / off repetition period when the operation mode is switched. The sensor unit always activates the reception function of the first transmission / reception circuit unit for a fixed time at an arbitrary cycle shorter than the arbitrary time.
[0021]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to an embodiment.
[0022]
FIG. 2 shows the configuration of the present embodiment. The system of the present embodiment is configured so that the warning mode and the non-warning mode are switched and set in the main CPU 41 as the second signal processing means of the controller unit 4 ′. Alternatively, a control function for transmitting the setting information of the non-warning mode from the transmission / reception circuit unit 40 to the sensor unit 2 by a radio signal is provided, and in response to this, the sensor unit 2 ′ is connected to the controller unit 4 as shown in FIG. A transmission / reception circuit unit 25 for performing bidirectional information communication between the controller unit 4 so as to receive the warning mode / non-warning mode setting information, and the first signal processing of the sensor unit 2 ′. When receiving the setting information of the non-warning mode, the CPU 23 as a means has a function of canceling the operation of transmitting the detection information from the transmission / reception circuit 25 even when the detection signal of the detection unit 21 is input. Was also receives the setting information of the alert mode in the non-alarm mode, it is characterized in that the detection signal of the detecting section 21 in that to perform the determination process incorporates the CPU 23.
[0023]
FIG. 3 shows an actual layout of the controller unit 4 and the sensor unit 2 constituting the human body heat detection sensor. The sensor unit 2 ′ is located at the lower front of the housing unit 26 incorporating the circuit unit shown in FIG. A storage unit 27 for the battery power source BT2 is provided so that the lid 27a can be removed from the front surface, and a detection unit 21 that is a human body heat detection unit is provided above the storage unit 27. The controller unit 4 has an antenna AT suspended on the side surface of the corner of the flat main body 1.
[0024]
In addition, since the other structure is the same as a prior art example, in FIG. 1, FIG. 2, the same code | symbol is attached | subjected to the same component as the component shown in FIG. 8, FIG. 9, and description is abbreviate | omitted.
[0025]
Next, the operation of this embodiment will be described with reference to FIG.
[0026]
First, in the alert mode, when the detection unit 21 of the sensor unit 2 ′ outputs a detection signal as shown in FIG. 4G and the detection signal is input to the CPU 23 as shown in FIG. Processing is performed, and the determination output signal is output to the transmission / reception circuit unit 25 as shown in FIG. Corresponding to this, the transmission / reception circuit unit 25 transmits the detection information as a radio signal as shown in FIG.
[0027]
The detection information sent by the radio signal is received by the transmission / reception circuit unit 40 of the controller unit 4 as shown in FIG. 4C and input to the main CPU 41. The main CPU 41 performs a determination process on the detection information. When the main CPU 41 determines from the detection information that an abnormality has been detected by the sensor unit 2 ′, the main CPU 41 sends a control signal to the sound control / output unit 47 so as to output an alarm sound. 4 (d), and an alarm sound is output from the speaker SP for a certain period of time as shown in FIG. 4 (e). At the same time, the detection information is reported to the security company through the telephone line 5 as shown in FIG. Further, the control signal is transmitted to the terminal 3 having the buzzer 31 as a load by a radio signal through the transmission / reception circuit unit 40, and the buzzer 31 of the terminal 3 is sounded to generate an alarm sound.
[0028]
Then, when the operation mode of the controller unit 4 is switched to the non-warning mode at the timing t1 of FIG. 4A from the above warning mode, for example, the controller unit 4 transmits / receives the transmission / reception circuit unit 40 under the control of the main CPU 41. As shown in FIG. 4B, the setting information of the non-warning mode is transmitted to each sensor unit 2 ′ as a radio signal.
[0029]
In each sensor unit 2 ′ that receives the setting information of the non-warning mode from the controller unit 4 as shown in FIG. 4 (i) by the transmission / reception circuit unit 25, the CPU 23 switches the non-warning mode as shown in FIG. 4 (j). Then, even if a detection signal is output from the detection unit 21 as shown in FIG. 4G and input to the CPU 23 as shown in FIG. 4H, the CPU 23 as shown in FIG. Cancels the determination process and stops the transmission of the detection information from the transmission / reception circuit unit 25 to the controller unit 4 as shown in FIG.
[0030]
Therefore, transmission of useless detection information from the sensor unit 2 ′ in the non-warning mode is stopped, and consumption of the battery power source BT2 of the sensor unit 2 ′ can be reduced.
[0031]
Then, when the non-warning mode is switched to the above-mentioned warning mode, the setting information of the warning mode is transmitted from the controller unit 4 to each sensor unit 2 ′, and after the CPU 23 of each sensor unit 2 ′ recognizes this warning mode switching, The CPU 23 starts the operation in the alert mode as described above, and performs processing by setting the detection signal of the detection unit 21 as valid.
[0032]
By the way, in this embodiment, in order to synchronize the reception gate of the sensor unit 2 ′ and the transmission timing of the controller unit 4, the following processing is performed.
[0033]
First, as shown in FIG. 5 (c), when the power is turned on at the sensor unit 2 ′, a predetermined time after the reset of the CPU 23 is released, the transmission / reception circuit unit 25 controls the CPU 23 to perform the operation shown in FIG. As shown in FIG. 4, information indicating power-on is transmitted by a radio signal.
[0034]
When the controller unit 4 receives information indicating power-on as shown in FIG. 5A, the controller unit 4 causes the transmission / reception circuit unit 40 to transmit a synchronization setting signal as shown in FIG. 5B. When the sensor unit 2 ′ that has transmitted the information indicating power-on receives the synchronization setting signal as shown in FIG. 5E, the sensor unit 2 ′ recognizes the reception (or a certain time after receiving the synchronization setting signal). Set synchronization as the synchronization reference timing. Thereafter, the reception gate of the sensor unit 2 ′ starts the transmission / reception circuit unit 25 periodically (interval T1) based on the synchronization timing, and sets the reception gate to a state as shown in FIG. The system waits for a transmission signal from the unit 4. Thus, by periodically opening the reception gate of the transmission / reception circuit unit 25, wasteful power consumption during standby can be reduced, and the battery life can be extended.
[0035]
As a method for synchronizing the reception gate of the sensor unit 2 ′ and the transmission timing of the controller unit 4, there is the following method.
[0036]
In this method, the signal is periodically transmitted by the controller unit 4 ((a) in FIG. 6 (c)) or whenever the warning mode setting or the non-warning mode setting is switched as shown in FIG. 6 (a). As shown in FIG. 6 (d), each time the sensor unit 2 ′ receives the signal ((b) or (c) in FIG. 6 (c)) as shown in FIG. Take.
[0037]
FIG. 6B shows a reception state in the controller unit 4, and FIG. 6F shows a transmission state of the sensor unit 2 ′.
[0038]
Note that the synchronization reference timing may not be reacquired for each reception as described above, but may be reacquired at regular time intervals or every time the number of receptions reaches a predetermined value using a radio clock or GPS radio wave.
[0039]
As in the method of FIG. 6, the reference timing of the synchronization of the reception gate of the sensor unit 2 ′ and the transmission timing of the controller unit 4 is set every time a signal is received from the controller unit 4 (or every fixed time or the number of receptions reaches a predetermined value). ) To prevent synchronization timing shifts caused by the influence of oscillator and clock variations, aging, temperature characteristics, etc., which are the reference for setting the synchronization interval of the controller unit 4 and the sensor unit 2 ′, etc. Therefore, it is not necessary to unnecessarily open the reception gate of the transmission / reception circuit unit 25 of the sensor unit 2 ′, current consumption in the transmission / reception circuit unit 25 can be suppressed, and battery life can be extended.
[0040]
In the method of synchronizing the transmission timings of the sensor unit 2 ′ and the controller unit 4 as in the methods of FIGS. 5 and 6, it is necessary to provide a margin such as a clock shift in the reception gate on section. A method of providing a reception gate only at a minimum necessary interval may be adopted.
[0041]
That is, in this method, as shown in FIG. 7C, the receiving gate of the sensor unit 2 ′ is turned on at a predetermined time T3 at regular intervals T1 under the control of the CPU 23.
[0042]
On the other hand, when the controller unit 4 is switched from the alert mode to the non-alert mode as shown in FIG. 7A or vice versa, the controller unit 4 is alerted at intervals of ΔT2 for a time T2 longer than the interval T1 of the reception gate of the sensor unit 2 ′. The setting information of the mode or the non-warning mode is transmitted as shown in FIG. T3 has a relationship of T3> ΔT2, and T2 has a relationship of T2> T1 + ΔT2.
[0043]
As a result, the sensor unit 2 ′ can always receive the setting information of the warning or non-warning mode at any timing when the reception gate is turned on as shown in FIG.
[0044]
According to the method shown in FIG. 7, since the reception gate of the transmission / reception circuit unit 25 of the sensor unit 2 ′ only needs to be a minimum necessary section, there is no need to turn on the reception gate unnecessarily, and the transmission / reception circuit of the sensor unit 2 ′. The current consumption of the unit 25 can be reduced.
[0045]
【The invention's effect】
According to the first aspect of the present invention, a first transmission / reception circuit unit that transmits / receives a radio signal, a detection unit that detects a state of a detection target, and information based on a detection signal of the detection unit is transmitted to the first transmission / reception circuit unit. 1 to a plurality of sensor units that operate by a battery power source, a second transmission / reception circuit unit that transmits / receives a radio signal, and the second transmission circuit unit And a second signal processing means for performing a judgment process based on information received from the sensor unit, and a warning mode in which the operation mode performs the judgment process by the second signal processing means or a non-warning for canceling the judgment process. In the wireless sensor system constituted by the controller unit set to be switched to the mode, the operation mode is set to be switched to the second signal processing means of the controller unit. And a function for transmitting the setting information as a radio signal from the second transmission / reception circuit unit, and the first signal processing means of the sensor unit from the controller unit received by the first transmission / reception circuit unit. Since the setting information is provided with a function to stop the transmission of information based on the detection of the detection unit when in the non-warning mode, the detection information is transmitted from the sensor unit to the controller unit only in the warning mode. Current consumption of the sensor unit can be reduced, and as a result, the life of the battery power source of the sensor unit can be extended, and a small battery power source with a small capacity can be used, and the sensor unit can be miniaturized. Since it is possible to supply the power that was consumed when it was transmitted unnecessarily to other circuit units, it is possible to use the detection unit as if it had not been used before. There is an effect that deploy applications spread of the support portion group.
[0046]
According to the first aspect of the invention, there is provided means for transmitting information of power-on from the first transmission / reception circuit unit of the sensor unit to the controller unit when the sensor unit is powered on, and the power source transmitted from the sensor unit When poured information received by the second transceiver circuit, a means for transmitting the sensor portion f confirmation signal from said second receive circuit unit provided in the controller unit, the signal of confirmation from the controller unit In the received sensor unit, the reception timing of the first transmission / reception circuit unit is set so that a signal from the controller unit can be received at regular intervals from the synchronization reference timing, using the reception timing as the synchronization reference timing. The current consumption of the transmission / reception circuit section can be further reduced, and the life of the battery power supply can be extended.
[0047]
According to a second aspect of the present invention, in the first aspect of the invention, the sensor unit is configured to receive a signal from the controller unit at regular intervals each time a signal transmitted from the controller unit is received. Since the synchronization reference timing for setting the reception gate of the transmission / reception circuit unit is set, and the invention of claim 3 is the invention of claim 1 , in the sensor unit, the sensor unit outputs a signal from the controller unit every arbitrary fixed time. Since the synchronization reference timing for setting the reception gate of the first transmission / reception circuit unit is set so that it can be received, variations in oscillators and clocks as a reference for setting the synchronization interval of the sensor unit, etc. It is possible to prevent synchronization timing shifts caused by changes, temperature characteristics, etc., and there is no need to unnecessarily open the reception gate of the transmission / reception circuit unit of the sensor unit. Capacitors portion further can reduce power consumption of the communication circuit unit of an effect that it is possible to extend further battery power life.
[0048]
The invention according to claim 4, characterized in that in the invention of claim 3, since the use of the radio clock as the means for generating the arbitrary time and the invention of claim 5 is the invention of claim 3, the arbitrary time Since GPS radio waves are used as the means for generating, there is an effect that the synchronization reference timing can be reacquired with high accuracy.
[0049]
According to a sixth aspect of the present invention, in the first aspect of the invention, the controller section transmits setting information from the second transmission / reception circuit section for an arbitrary time at an arbitrary transmission on / off repetition period when the operation mode is switched. Since the sensor unit always activates the reception function of the first transmission / reception circuit unit for a certain period of time at an arbitrary period shorter than the arbitrary time, it is a reference for setting the synchronization interval of the sensor unit, etc. There is no need to provide a margin for a certain clock shift in the ON section of the reception gate, and it is only necessary to have the reception gate of the sensor section at the minimum necessary section. Therefore, there is no need to turn on the reception gate unnecessarily. This has the effect of further reducing the power consumption of the transmission / reception circuit section.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a sensor unit used in an embodiment of the present invention.
FIG. 2 is a configuration diagram of the entire system.
FIG. 3 is a perspective view showing an actual arrangement of a controller unit and a sensor unit.
FIG. 4 is a timing chart for explaining the operation of the above.
FIG. 5 is a timing chart for explaining the operation of the method for setting the synchronization reference timing between the transmission of the controller unit and the reception of the sensor unit.
FIG. 6 is a timing chart for explaining the operation of another method for setting the synchronization reference timing.
FIG. 7 is a timing chart for explaining the operation of another method for determining the transmission timing of the controller unit and the reception timing of the sensor unit.
FIG. 8 is a configuration diagram of the entire system of a conventional example.
FIG. 9 is a configuration diagram of a sensor unit used in the above.
FIG. 10 is a timing chart for explaining the operation of the above.
FIG. 11 is a timing chart for explaining the operation at the time of periodic notification.
[Explanation of symbols]
2 'sensor part 20 power supply circuit part 21 detection part 23 CPU
24 Voltage monitoring reset circuit unit 25 Transmission / reception circuit unit BT2 Battery power supply AT1 Antenna

Claims (6)

A first transmission / reception circuit unit for transmitting / receiving a radio signal, a detection unit for detecting a state of a detection target, and a first signal for transmitting information based on a detection signal of the detection unit from the first transmission / reception circuit unit by a radio signal. One or more sensor units that are operated by a battery power source, a second transmission / reception circuit unit that transmits and receives radio signals, and the sensor unit that is received by the second transmission circuit unit. And a second signal processing unit that performs a determination process based on the information of the controller, and the second signal processing unit is set to switch to a warning mode in which the operation mode performs the determination process or a non-warning mode in which the determination process is canceled by the second signal processing unit When the operation mode is switched and set in the second signal processing unit of the controller unit, the setting information is transmitted to the wireless sensor system configured by the unit. 2 having a function of transmitting by radio signal from the transmission / reception circuit unit, and the first signal processing unit of the sensor unit receives setting information from the controller unit received by the first transmission / reception circuit unit in a non-warning mode. Provided with a function to stop the transmission of information based on the detection of the detection unit ,
Means for transmitting information of power-on from the first transmission / reception circuit section of the sensor section to the controller section when the sensor section is powered on, and the power-on information transmitted from the sensor section is transmitted to the second section; When the transmission / reception circuit unit receives the confirmation signal from the second transmission / reception circuit unit, the controller unit includes means for transmitting the confirmation signal to the sensor unit, and the sensor unit that has received the confirmation signal from the controller unit receives the confirmation signal. A wireless sensor system characterized in that the reception gate of the first transmission / reception circuit unit is set so that a signal from the controller unit can be received at regular intervals from the synchronization reference timing with the timing as a synchronization reference timing . Each time a signal transmitted from the controller unit is received, the sensor unit sets a synchronization reference timing for setting the reception gate of the first transmission / reception circuit unit so that the signal from the controller unit can be received. The wireless sensor system according to claim 1 . The synchronization reference timing for setting the reception gate of the first transmission / reception circuit unit is set in the sensor unit so as to be able to receive a signal from the controller unit at any given time. The wireless sensor system according to 1 . 4. The wireless sensor system according to claim 3 , wherein a radio timepiece is used as the means for generating the arbitrary time . 4. The wireless sensor system according to claim 3 , wherein a radio wave of GPS is used as the means for generating the arbitrary time . The controller unit transmits the setting information from the second transmission / reception circuit unit at an arbitrary transmission ON / OFF repetition cycle for an arbitrary time when the operation mode is set to be switched, and the sensor unit always has a time longer than the arbitrary time. wireless sensor system of claim 1, wherein the only starting the reception function of the first communication circuit unit fixed time in a short arbitrary cycle.

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