JP2003016555A - Wireless sensor system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wireless sensor system that reduces the consumption of the battery power supply of a sensor by stopping useless transmission operation of the sensor in a non-caution mode and eliminating useless power consumption. SOLUTION: In the case a sensor part 2' receives setting information of the non-caution mode from a controller part 4 with a transmitting and receiving circuit part 25, a CPU 23 recognizes non-caution mode switching. Even though a detecting part 21 subsequently outputs a detection signal and inputs the detection signal to the CPU 23, the CPU 23 cancels decision processing and makes the transmitting and receiving circuit part 25 stop transmission of detection information to the controller part 4.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a wireless sensor system.

[0002]

2. Description of the Related Art A conventional wireless sensor system is shown in FIG.
As shown in FIG. 3, the sensor unit 2 group that detects the state of the detection target in the monitoring area, various terminals 3, and the controller unit 4 are included.

The controller section 4 includes the sensor section 21 ...
A transmission / reception circuit unit 40 having a receiving means for receiving the detection information transmitted from the group and a transmitting means for transmitting a control signal to various terminals 3 as a radio signal, and a signal processing means for performing signal processing and control processing. A main CPU 41, a power supply circuit section 42 for inputting commercial power to convert it into a predetermined voltage, a backup battery power supply BT1, a display circuit section 43, and a sensor for inputting detection information from the sensor section 21 ... by wire. In order to communicate with the input unit 44, a telephone line control CPU 45 that transmits detection information and monitoring status information to a security company or the like via the telephone line 5, various external information terminals 6 and general-purpose standards such as RS-485. RS-485 CPU46 and speaker S
Voice control / output unit 4 for controlling the alarm voice output to P
7, a key input circuit section 48 for inputting a key operation signal provided in an operation section (not shown), and monitoring the power supply voltage to change from a state where the power supply voltage is lower than a predetermined value to a predetermined value as when the power is turned on. It is composed of a voltage monitoring reset circuit section 49 for releasing the reset state of the main CPU 41 when it rises, a memory M1 for storing data and programs, and an antenna AT.

As the sensor unit 2, a human body heat detection sensor,
There are 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 a battery power source B as shown in FIG.
Power supply circuit unit 20 for obtaining a predetermined voltage + V from T2
And a detection unit for detecting the state of the detection target in the monitoring area (for example, in the case of a human body heat detection sensor, a detection unit according to the detection target such as a human body heat detection unit that detects the heat ray of the human body) 21, , The transmission circuit unit 22 that transmits the state of the detected object in the sensed monitoring area as detection information to the controller unit 4 by a wireless signal, and the detection signal of the detection unit 21 is processed by the transmission circuit unit 22 by a wireless signal. CPU 23 as a signal processing means for carrying out signal processing for transmission and control processing
A memory M2 for storing programs and data, and a voltage monitoring reset circuit section 24 for monitoring the power supply voltage and canceling the reset of the CPU 23 when the power supply voltage exceeds a predetermined value from a predetermined value or less, such as when power is turned on, It is composed of an antenna AT1.

On the other hand, as the terminal 3, for example, as shown in FIG. 8, a receiving circuit section 30 for receiving a control signal sent by a radio signal from the controller section 4, and a control signal received by the receiving section 30 are used. Controlled load (Fig. 8
In this case, the terminal 3 constitutes a buzzer box, and a buzzer 31) as a controlled load and an antenna AT
2 and the operating power source is obtained from the commercial power source.

Next, the operation of the conventional wireless sensor system will be described with reference to FIG.

First, the controller unit 4 is the key input circuit unit 4
It is possible to switch and set two operation modes, a warning mode and a non-warning mode, through 8. Figure 1
It is assumed that the mode is set to the alert state as indicated by 0 (a).

In this operation mode, as shown in FIG. 10 (f), the detection unit 21 provided in the sensor unit 2 sends a detection signal (a human body detection signal in the case of a human body heat detection unit) to the CPU.
It outputs to 23. The detection signal of the CPU 23 is shown in FIG.
When input as shown in, the CPU 23 determines whether or not the alarm is issued based on the detection signal (presence or absence of the human body if the signal is a detection signal of the human body heat detection unit), and the CPU 23 determines that the alarm is issued. The signal is output as shown in FIG. 10 (h), and the transmission circuit unit 22 that has received the determination output signal transmits the detection information as a wireless signal as shown in FIG. 10 (i).

The detection information sent by this radio signal is sent to the transmission / reception circuit section 40 of the controller section 4 in FIG.
It is received as shown in (b) 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 to the voice control / output unit 47 so as to output an alarm voice as shown in FIG. , A warning sound is output from the speaker SP for a certain period of time as shown in FIG. Telephone line 5 at the same time
The detection information is notified to the security company through the through the. Also, control information is transmitted to the terminal 3 having the buzzer 31 as a load through the transmission / reception circuit section 40, and the buzzer 31 of the terminal 3 is sounded to generate an alarm sound.

[0010]

In the conventional system described above, for example, a resident of the house in which the system is installed is at home, and the controller unit 4 is set to switch to the non-warning mode as shown at timing t1 in FIG. 10 (a). Even then, each sensor unit 2 continues to detect the state of the monitoring area. That is, after the timing t1, as shown in FIG.
When the detection signal is generated by the CPU 23, the CPU 23 inputs the detection signal (FIG. 10 (g)), performs the determination process, and outputs the determination output signal to the transmission circuit unit 22 as shown in FIG. 10 (h). In response to this, the transmission circuit unit 22 transmits the detection information as a radio signal as shown in FIG. 10 (i). On the other hand, in the controller section 4 which has entered the non-warning mode, even if the transmission / reception circuit section 40 receives the detection information from the sensor section 2 as shown in FIG. Cancel (Fig. 10 (c)), speaker SP
No sound is emitted from the computer or the buzzer 31 sounds (see FIG. 10).
(D)) Also, no notification is sent to the security company (Fig. 10).
(E)).

Even if the sensor unit 2 does not output a detection signal from the detection unit 21 as shown in FIG. 11F and does not input the detection signal to the CPU 23 as shown in FIG. 11G, As shown in FIG. 11 (h), the CPU 23 outputs a periodic alarm signal to the transmission circuit unit 22 at a constant cycle, and the transmission circuit unit 22 responds to this periodic alarm signal by the transmission circuit unit 22 shown in FIG. 11 (i).
As shown in, the periodical report information is transmitted to the controller unit 4. In the controller unit 4, the transmission / reception circuit unit 40 transmits the periodical notification information regardless of the operation mode.
When receiving as shown in FIG.
As shown in (c), the periodical alarm information is recognized and stored in the memory M1, and the stored information is reported to the security company regularly or irregularly as shown in FIG. 11 (e). , The operation state of the sensor unit 2 ... That is, the operation of the sensor unit 2 can be confirmed by the sensor unit 2 periodically transmitting a wireless signal. Note that FIG. 11A shows a setting state of the warning / non-warning mode, and in the illustrated example, the setting is set to the non-warning mode. In addition, when receiving the periodic report information, the voice output is shown in FIG.
It is not output as shown in (d).

As described above, in the non-warning mode, the controller unit 4 cancels the process and does not generate an alarm even when the detection information is received from the sensor unit 2, but the sensor unit 2 is set in the non-warning mode. Since it is not possible to recognize this, the state of the monitoring area is monitored. Therefore, for example, in the case of a human body heat detection sensor, detection information is transmitted each time a human body passes through the monitoring area, and therefore the battery power source BT2 However, there is a problem in that the battery life is shortened due to large power consumption depending on the sensor unit 2. In addition, the battery is consumed by the above-mentioned regular transmission.

The present invention has been made in view of the above points, and an object of the present invention is to stop useless transmission operation of a sensor in a non-alert mode to eliminate useless power consumption and to use a battery power source for the sensor. (EN) Provided is a wireless sensor system with reduced power consumption.

[0014]

In order to achieve the above object, in the invention of claim 1, the first aspect of transmitting and receiving a radio signal is described.
Of the transmitting / receiving circuit section, a detecting section for detecting the state of the detection target, and a first signal processing means for transmitting information based on a detection signal of the detecting section from the first transmitting / receiving circuit section by a radio signal. A first and a plurality of sensor units operated by a battery power source, a second transmission / reception circuit unit for transmitting and receiving radio signals, and a judgment process based on information from the sensor unit received by the second transmission circuit unit A wireless sensor system including a second signal processing unit, and a controller unit whose operation mode is switched to a warning mode in which the operation mode makes a judgment process or a non-warning mode to cancel the judgment process by the second signal processing unit. In the above, when the operation mode is switched and set in the second signal processing means of the controller section, setting information is wirelessly transmitted from the second transmission / reception circuit section. The setting information from the controller unit received by the first transmission / reception circuit unit is provided to the first signal processing unit of the sensor unit based on the detection of the detection unit in the non-warning mode. It is characterized by having a function of stopping transmission of information.

According to a second aspect of the present invention, in the first aspect of the present invention, there is provided means for transmitting power-on information from the first transmission / reception circuit section of the sensor section to the controller section when the sensor section is turned on. When the power-on information transmitted from the sensor unit is received by the second transmission / reception circuit unit, a means for causing the second transmission / reception circuit unit to transmit a confirmation signal to the sensor unit after a certain time has passed. In preparation for this, the sensor unit that has received the confirmation signal from the controller unit uses the reception timing as a synchronization reference timing so that the signal from the controller unit can be received at regular intervals from the synchronization reference timing. It is characterized in that the reception gate of the transmission / reception circuit section is set.

According to a third aspect of the present invention, in the second aspect of the invention, each time the signal transmitted from the controller section is received, the sensor section can receive the signal from the controller section at regular intervals. Is set to the synchronization reference timing for setting the reception gate of the first transmission / reception circuit unit.

According to a fourth aspect of the invention, in the second aspect of the invention, the sensor section receives the signal from the first transmission / reception circuit section so that the sensor section can receive a signal from the controller section at an arbitrary fixed time. It is characterized in that the synchronization reference timing for setting the gate is set.

The invention of claim 5 is characterized in that, in the invention of claim 4, a radio-controlled timepiece is used as a means for generating the arbitrary time.

The invention of claim 6 is characterized in that, in the invention of claim 4, a GPS radio wave is used as a means for generating the arbitrary time.

According to a seventh aspect of the invention, in the first aspect of the invention, the controller section sets the setting information from the second transmission / reception circuit section at an arbitrary transmission ON / OFF repetition cycle when the operation mode is switched. It is characterized in that it is transmitted only for a period of time, and the sensor unit always activates the receiving function of the first transmitting / receiving circuit unit for a certain period of time at an arbitrary cycle shorter than the arbitrary time.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to one embodiment.

FIG. 2 shows the configuration of this embodiment. In the system of this embodiment, the main CPU 41, which is the second signal processing means of the controller unit 4 ', is set to switch between the warning mode and the non-warning mode. And a control function of transmitting the setting information of the warning mode or the non-warning mode from the transmission / reception circuit section 40 to the sensor section 2 by a radio signal, and correspondingly, as shown in FIG. 1, the sensor section 2 ′ has a controller section. Four
Transmission / reception circuit unit 2 for bidirectional information communication with
5 is provided so that the controller section 4 can receive the warning mode / non-warning mode setting information, and the CPU 23, which is the first signal processing means of the sensor section 2 ′, receives the non-warning mode setting information. When the detection signal of the detection unit 21 is input, a function of canceling the operation of transmitting the detection information from the transmission / reception circuit 25 is provided, and when the setting information of the warning mode is received in the non-warning mode state, the detection of the detection unit 21 is performed. It is characterized in that the CPU 23 takes in a signal and performs a determination process.

FIG. 3 is a physical layout diagram of the controller section 4 and the sensor section 2 constituting the human body heat detecting sensor.
The sensor unit 2'is a case unit 2 having the circuit unit shown in FIG.
A storage portion 27 for the battery power source BT2 is provided at the lower front portion of the battery 6 so that the lid 27a can be removed from the front surface, and a detection portion 21, which is a human body heat detection portion, is provided above the storage portion 27. The controller unit 4 has an antenna AT erected on the side surface of the corner of the flat body 1.

Since the other structure is the same as that of the conventional example, the same components as those shown in FIGS. 8 and 9 are designated by the same reference numerals in FIGS. 1 and 2, and the description thereof is omitted.

Next, the operation of this embodiment will be described with reference to FIG.

First, in the alert mode, when the detection section 21 of the sensor section 2'outputs a detection signal as shown in FIG. 4 (g) and the detection signal is input to the CPU 23 as shown in FIG. 4 (h), The CPU 23 performs a determination process and outputs a determination output signal 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. 4 (k).

The detection information sent by this radio signal is sent to the transmission / reception circuit section 40 of the controller section 4 in FIG.
It is received as shown in (c) and input to the main CPU 41. The main CPU 41 performs a judgment process for this detection information, and when it judges from the detection information that an abnormality is detected in the sensor unit 2 ′, it sends a control signal to the voice control / output unit 47 so as to output an alarm voice. 4 (d), the speaker SP is output for a certain period of time as shown in FIG. 4 (e).
More alarm sound is output. At the same time, the detection information is reported to the security company through the telephone line 5 as shown in FIG.
In addition, 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 section 40, and the terminal 3
The buzzer 31 is activated to generate an alarm sound.

Then, when the operation mode of the controller unit 4 is switched to the non-warning mode from the above warning mode at timing t1 in FIG. 4A, the controller unit 4 transmits and receives under the control of the main CPU 41. Circuit part 4
As shown in FIG. 4B, the setting information of the non-warning mode is transmitted to each sensor unit 2 ′ by a wireless signal.

In each sensor unit 2'which has received the non-alert mode setting information from the controller unit 4 as shown in FIG. 4 (i) in the transmitting / receiving circuit unit 25, the CPU 23 is Recognizing the switching of the warning mode,
As shown in (g), the detection signal is output from the detection unit 21,
Even if the input is made to the CPU 23 as shown in FIG.
As shown in (j), the CPU 23 cancels the determination process and stops the transmission of the detection information from the transmission / reception circuit section 25 to the controller section 4 as shown in FIG. 4 (k).

Therefore, the useless transmission of the detection information from the sensor unit 2'in the non-alert mode is stopped, and the battery power BT2 of the sensor unit 2'can be reduced.

When the non-warning mode is switched to the above-mentioned warning mode, the controller section 4 transmits the setting information of the warning mode to each sensor section 2 ', and the CPU 23 of each sensor section 2'recognizes this warning mode switching. After that, the CPU 23 starts the operation in the alert mode as described above, and performs the process by validating the detection signal of the detection unit 21.

By the way, in this embodiment, the sensor unit 2 '
The following processing is performed in order to synchronize the transmission timings of the reception gate and the controller unit 4.

First, as shown in FIG. 5C, the sensor section 2 '
When the power is turned on, the information indicating power-on is transmitted by a radio signal from the transmission / reception circuit unit 25 under the control of the CPU 23 after a fixed time after the reset of the CPU 23 is released. To be done.

When the controller section 4 receives the information indicating power-on as shown in FIG. 5A, it causes the transmission / reception circuit section 40 to transmit the synchronization setting signal as shown in FIG. 5B. Upon receiving the synchronization setting signal as shown in FIG. 5 (e), the sensor unit 2 ′ that has transmitted the information indicating that the power supply is turned on recognizes the reception (or a certain time after receiving the synchronization setting signal). Synchronization is set as the synchronization reference timing. Thereafter, the receiving gate of the sensor unit 2 ′ periodically (interval T1) activates the transmitting / receiving circuit unit 25 with the synchronization timing as a reference to set the receiving gate to the state as shown in FIG. It waits for a transmission signal from the unit 4. By thus periodically opening the reception gate of the transmission / reception circuit unit 25, it is possible to reduce wasteful power consumption during standby and extend battery life.

There is also the following method for synchronizing the reception timing of the sensor section 2'and the transmission timing of the controller section 4.

In this method, a signal to be periodically transmitted by the controller unit 4 ((a) in FIG. 6 (c)) or the signal shown in FIG.
As shown in FIG. 6A, the sensor unit 2 ′ sends a signal ((B) or (C) in FIG. 6C) which is transmitted each time the warning mode setting or the non-warning mode setting is switched to the one shown in FIG. 6D. As shown in FIG. 6 (d), the reception gates are synchronized each time reception is performed.

FIG. 6B shows the reception state of the controller unit 4, and FIG. 6F shows the transmission state of the sensor unit 2 '.

It should be noted that the synchronization reference timing is not re-acquired for each reception as described above, but may be re-accounted for at regular time intervals or whenever the number of times of reception reaches a predetermined value by utilizing radio waves of a radio clock or GPS. good.

As in the method of FIG. 6, the reference timing for synchronizing the transmission gates of the sensor section 2'and the controller section 4 is set every time a signal is received from the controller section 4 (or at a fixed time or the number of times of reception is a predetermined value). Every time), the synchronization timing shift occurs due to the influence of the variation of the oscillator and the clock, which is the standard for setting the synchronization interval of the controller unit 4 and the sensor unit 2 ′, the secular change, and the temperature characteristic. And it is not necessary to open the reception gate of the transmission / reception circuit unit 25 of the sensor unit 2 ′ wastefully,
It is possible to suppress the current consumption in the transmission / reception circuit section 25 and extend the battery life.

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 receiving gate ON section. A method of providing the 2'reception gate only in the minimum necessary section may be adopted.

That is, in this method, as shown in FIG. 7 (c), the receiving gate of the sensor section 2'is turned on for a predetermined time T3 at regular intervals T1 under the control of the CPU 23.

On the other hand, when the controller section 4 is switched from the warning mode to the non-warning mode as shown in FIG. 7A or vice versa, the interval T between the receiving gates of the sensor section 2 '.
The setting information of the warning mode or the non-warning mode is transmitted at an interval of ΔT2 for a time T2 longer than 1 as shown in FIG. 7B. Note that T3 has a relationship of T3> ΔT2, and T2 is T
Each has a relationship of 2> T1 + ΔT2.

As a result, the sensor section 2'can always receive the setting information of the warning or non-warning mode at any timing when the receiving gate is turned on as shown in FIG. 7 (d).

According to the method shown in FIG. 7, since the reception gate of the transmission / reception circuit section 25 of the sensor section 2'needs to have only the minimum necessary section, it is not necessary to turn on the reception gate unnecessarily, and the sensor section 2 ' It is possible to reduce the current consumption of the transmitting / receiving circuit unit 25.

[0045]

According to the first aspect of the present invention, the first transmission / reception circuit section for transmitting and receiving radio signals, the detection section for detecting the state of the object to be detected, and the information based on the detection signal of the detection section The first transmission / reception circuit unit transmits a wireless signal first
And a signal processing means for
A plurality of sensor units, a second transmission / reception circuit unit that transmits and receives radio signals, and a second signal processing unit that performs a determination process based on information from the sensor unit that is received by the second transmission circuit unit. In the wireless sensor system, the wireless sensor system further includes a controller unit that is set to switch to an alert mode in which the operation mode performs a determination process or a non-alert mode in which the determination process is canceled by the second signal processing unit. The second signal processing means has a function of transmitting setting information by a radio signal from the second transmission / reception circuit section when the operation mode is switched and set, and the second signal processing means is provided in the first signal processing means of the sensor section. Is transmission of information based on the detection of the detection unit when the setting information received from the first transmission / reception circuit unit from the controller unit is in the non-warning mode. Since it has a function to stop, the detection information is sent from the sensor section to the controller section only in the alert mode, so the current consumption of the transmission / reception circuit section of the sensor section can be reduced, and as a result, the life of the battery power supply of the sensor section can be reduced. It is possible to extend the battery, and it is possible to use a small battery power source with a small capacity, which allows the sensor unit to be downsized, and to supply the power that was consumed when transmitting wastefully to other circuit units. Therefore, it is possible to use the detection unit like it could not be used before,
This has the effect of expanding the application of the sensor unit group.

According to a second aspect of the present invention, in the first aspect of the present invention, there is provided means for transmitting power-on information from the first transmission / reception circuit section of the sensor section to the controller section when the sensor section is turned on. When the power-on information transmitted from the sensor unit is received by the second transmission / reception circuit unit, a means for causing the second transmission / reception circuit unit to transmit a confirmation signal to the sensor unit after a certain time has passed. In preparation for this, the sensor unit that has received the confirmation signal from the controller unit uses the reception timing as a synchronization reference timing so that the signal from the controller unit can be received at regular intervals from the synchronization reference timing. Since the receiving gate of the transmitting and receiving circuit part of is set,
It is possible to further reduce the current consumption of the transmitting / receiving circuit unit and extend the life of the battery power supply.

According to a third aspect of the invention, in the second aspect of the invention, each time the signal transmitted from the controller section is received, the sensor section can receive the signal from the controller section at regular intervals. Since the synchronization reference timing for setting the reception gate of the first transmission / reception circuit unit is set to the above, the invention of claim 4 is the invention of claim 2, wherein in the sensor part, the controller part is set at every predetermined time. Since the synchronization reference timing for setting the reception gate of the first transmission / reception circuit unit is set so that the signal from the receiver can be received, the oscillator or clock which is the reference for setting the synchronization interval or the like of the sensor unit is set. Variation, aging,
It is possible to prevent the synchronization timing shift caused by the influence of temperature characteristics, etc., and it is not necessary to wastefully open the reception gate of the transmission / reception circuit unit of the sensor unit, and further reduce the power consumption in the transmission / reception circuit unit of the sensor unit. Therefore, there is an effect that the life of the battery power source can be further extended.

According to the invention of claim 5, in the invention of claim 4, the radio clock is used as a means for generating the arbitrary time, and the invention of claim 6 is the same as the invention of claim 4, Since the GPS radio wave is used as a means for generating the time, there is an effect that the synchronization reference timing can be re-acquired with high accuracy.

According to a seventh aspect of the present invention, in the first aspect of the present invention, the controller section sets the setting information from the second transmission / reception circuit section at an arbitrary transmission ON / OFF repetition cycle when setting the operation mode switching. In order to set the synchronization interval etc. of the sensor unit, the sensor unit always activates the receiving function of the first transmission / reception circuit unit for a certain period of time in an arbitrary cycle shorter than the arbitrary time. It is no longer necessary to provide a margin such as clock shift, which is the standard of the above, in the ON section of the receiving gate, and it suffices to set the receiving gate of the sensor unit to the minimum required section. Therefore, it is not necessary to turn on the receiving gate unnecessarily. The effect is that the power consumption of the transmission / reception circuit section of the sensor section can be further reduced.

[Brief description of 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 an entire system of the above.

FIG. 3 is a perspective view showing a physical arrangement of a controller unit and a sensor unit of the above.

FIG. 4 is a timing chart for explaining the above operation.

FIG. 5 is a timing chart for explaining the operation of the method of setting the synchronization reference timing for the transmission of the controller unit and the reception of the sensor unit in the above.

FIG. 6 is a timing chart for explaining the operation of another setting method of the synchronization reference timing of the above.

FIG. 7 is a timing chart for explaining the operation of another method of the timing of transmission of the controller unit and reception of the sensor unit in the above.

FIG. 8 is a block diagram of the entire conventional system.

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 the periodical alarm notification in the above.

[Explanation of symbols]

2'sensor section 20 power circuit 21 Detector 23 CPU 24 Voltage monitoring reset circuit section 25 Transmitter / receiver circuit section BT2 battery power supply AT1 antenna

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Toshiharu Takenouchi             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company (72) Inventor Sou Ikari             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company (72) Inventor Mitsunobu Kuroda             1048, Kadoma, Kadoma-shi, Osaka Matsushita Electric Works Co., Ltd.             Inside the company F-term (reference) 2G005 DA04                 5C087 AA02 AA03 AA25 AA42 BB12                       BB21 BB32 BB55 BB74 DD03                       EE08 FF01 FF02 FF17 FF19                       FF20 GG07 GG20 GG31 GG36                       GG46                 5K067 AA43 BB27 FF20 GG01 HH22

Claims (7)

[Claims] 1. A first transmission / reception circuit section for transmitting / receiving a radio signal, a detection section for detecting a state of an object to be detected, and information based on a detection signal of the detection section is wirelessly transmitted from the first transmission / reception circuit section. A first signal processing unit for transmitting a signal, and one or a plurality of sensor units operated by a battery power source; a second transmitting / receiving circuit unit for transmitting / receiving a wireless signal;
Second signal processing means for performing judgment processing based on the information from the sensor portion received by the transmission circuit portion of the warning circuit or the judgment processing in which the operation mode is judged by the second signal processing means. In a wireless sensor system configured by a controller unit that is switched and set to a non-warning mode to cancel, when the operation mode is switched and set to the second signal processing means of the controller unit, setting information is set to the second information. Of the sensor unit, the first signal processing means of the sensor unit receives the setting information from the controller unit received by the first transmitter / receiver circuit unit in the non-warning mode. A wireless sensor system having a function of stopping transmission of information based on detection by a detection unit. 2. The power-on information transmitted from the sensor unit, comprising means for transmitting power-on information from the first transmitting / receiving circuit unit of the sensor unit to the controller unit when the sensor unit is powered on. Is received by the second transmission / reception circuit unit, the controller unit is provided with means for transmitting a confirmation signal to the sensor unit from the second transmission / reception circuit unit after a predetermined time, and a confirmation signal from the controller unit is transmitted. In the received sensor section, the reception timing is set as the synchronization reference timing, and the reception gate of the first transmission / reception circuit section is set so that the signal from the controller section can be received at regular intervals from the synchronization reference timing. The wireless sensor system of claim 1 characterized. 3. A synchronization reference timing for setting a reception gate of a first transmission / reception circuit unit so that the sensor unit can receive the signal from the controller unit every time the signal transmitted from the controller unit is received. The wireless sensor system according to claim 2, wherein 4. The sensor unit sets a synchronization reference timing for setting a reception gate of the first transmission / reception circuit unit so that a signal from the controller unit can be received at an arbitrary fixed time. The wireless sensor system of claim 2, wherein the wireless sensor system is a wireless sensor system. 5. The wireless sensor system according to claim 4, wherein a radio clock is used as the means for generating the arbitrary time. 6. A GP as a means for generating the arbitrary time.
The wireless sensor system according to claim 4, wherein S radio waves are used. 7. The controller unit causes the second transmission / reception circuit unit to transmit setting information at an arbitrary transmission ON / OFF repetition period for an arbitrary time when the operation mode is switched, and the sensor unit always operates as described above. The wireless sensor system according to claim 1, wherein the receiving function of the first transmitting / receiving circuit unit is activated for a certain period of time at an arbitrary cycle shorter than the arbitrary time.