JP2994332B2 - Wireless observation system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio observation system used for collecting observation data at a remote place by using a portable telephone and transmitting the data to a monitoring station by radio.

[0002]

2. Description of the Related Art Data used for disaster monitoring is rainfall, water level or landslide amount. Even if additional data such as station number and observation date and time are added, the data transmission amount is at most several tens of bytes. In addition, the frequency of data transmission is as low as once every two minutes even in the case of rainfall of 30 mm / hour for rainfall, and at most once per hour for water level or landslide. It can be called sporadic communication as a whole.

[0003]

However, in such a conventional disaster monitoring method, since such transmission is performed by a dedicated radio transceiver, the number of workers and labor required for design and construction are low even though the frequency of use of the radio transceiver is low. There was a property that there are many. In the development stage, we negotiated protocols such as modulation method and transmission method, conducted radio wave propagation tests, and installed antennas, civil engineering work at the observation station building, and obtained a wireless station license from the Telecommunications Supervision Bureau. There was a problem that it was necessary to take various steps such as data acquisition and license application procedure.

[0004] By the way, with the above-mentioned transmission characteristics, it is possible to cope with the data communication function of the mobile phone without using the dedicated radio transceiver, and to replace the dedicated radio transceiver with the mobile phone. Thus, it is considered that various works of design and construction can be reduced. In addition, conventional disaster monitoring facilities usually have several to over a dozen monitoring stations, and it is expected that some monitoring stations will be unable to acquire data due to overlapping transmissions from multiple monitoring stations. You.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems and to reduce various design and construction work. An object of the present invention is to obtain a wireless observation system that can reliably obtain disaster information and the like on the ground.

[0006]

For the purposes achieved SUMMARY OF THE INVENTION, wireless observation system according to the invention of claim 1, the monitoring station watched
In a wireless observation system for monitoring by a signal wirelessly received from a measurement station , a clock circuit provided in the observation station is provided.
Signal that is generated at regular intervals or / and falls
An electrical contact signal is generated from the rain gauge to add the integrated rainfall value
In response to interruption of the activation signal each time, observed from the rain gauge or other monitoring sensors of the central processing unit
A data acquisition device to perform measurement of data, after finishing the measurement of the observed data, supplied with power under the control of the central processing circuit, comprising a mobile phone and to transmit the observation data to the monitoring station, The central processing circuit is configured to start the
The signal interrupt is caused by the clock circuit or from the rain gauge
Is determined by the electrical connection signal of the
Power supply to observation sensors other than the rain gauge
This is to make the input .

In the wireless observation system according to the second aspect of the present invention, when the state shifts to the communication state of the observation data,
To stop supplying power to observation sensors other than the rain gauge
It is something to do .

In a wireless observation system according to a third aspect of the present invention, the data communication unit including the mobile phone includes an observation data
Via a switch that activates when the
Power is supplied from the storage battery.
You.

Further, in the wireless observation system according to the invention of claim 4, the communication of the observation data is performed between the monitoring station and the monitoring station.
Check the contents of transmission data and response data performed by the observation station.
When there is a match, the process is terminated.

A wireless observation system according to a fifth aspect of the present invention monitors the transmission of observation data from an observation station.
If there is an error in the response from the station, the observation station
Data is resent, and a response is obtained
If not, terminate the transmission and send power to the data communication unit.
The power supply is stopped.

[0011]

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a wireless observation system according to the present invention. In FIG. 1, reference numeral 1 denotes an observation station, and 2 denotes a monitoring station that wirelessly communicates with the observation station 1 to monitor observation data on the observation station 1 side. . In the observation station 1, reference numeral 3 denotes a data collection device, which is a central device that performs collection and measurement of observation data by receiving an interrupt of a start signal at regular intervals or / and when the observation sensor is electrically connected. An arithmetic circuit 4 is provided. The central processing circuit 4 collects and measures outputs of observation sensors such as a water level gauge and a landslide meter, and also collects and measures detection data of a rain gauge via a rain gauge input circuit 6.

Reference numeral 7 denotes a modem for converting the measurement data into data by adding a station identification number and a measurement time.
Is a voice / data switch for switching the voice / data of the data output of the modem 7, 9 is a network controller for dialing out the output signal of the voice / data switch and connecting to an external network, and 10 is a data controller. A communicable satellite mobile phone, 11 is a mobile phone.

Reference numeral 12 denotes a power supply circuit for supplying DC power from the storage battery 14 to the portable telephone 11 through a relay 13 as a switch which is turned ON only during data measurement and data communication. DC power is also supplied from the storage battery 14 via the relay 13 to the data communication unit A including the voice / data switch 8, the network controller 9, and the satellite mobile phone 10. The clock circuit 5 and the rain gauge input circuit 6 are always energized. Power is supplied to the central processing circuit 4 only at the time of data measurement and data transmission. In addition, 15 is a solar cell provided as needed, 16
Is a charge / discharge controller for controlling the charge / discharge of the power generated by the solar cell 15 with respect to the storage battery 14.

On the other hand, in the monitoring station 2, reference numerals 17 and 18 denote a portable telephone for receiving data from the observation station 1 and a normal telephone, which are connected to a personal computer 20 which takes in data received via a modem 19. . Reference numeral 21 denotes software for processing the data, 22 denotes a display device such as a CRT display for displaying the processing result, and 23 denotes an output device such as a printer.

Next, the operation will be described with reference to the timing chart of the signals of the respective blocks shown in FIG. 2 and the explanatory diagram of the communication procedure shown in FIG. First, when the data collection device 3 is started, the central processing circuit 4, the clock circuit 5,
The operation of the rain gauge input circuit 6 is initialized, and the central processing circuit 4 enters a standby state, which is a power saving state. Thereafter, the clock circuit 5 and the rain gauge input circuit 6 operate while being constantly energized.
On the other hand, the interrupt signal to the central processing circuit 4 is generated by one or both of the output of the start signal from the clock circuit 5 and the electrical connection of the rain gauge at regular intervals. In FIG. 2, t1
At this time, a start signal is generated, which causes an interruption to the central processing circuit 4. Upon receiving the interruption, the central processing circuit 4 shifts from the standby state to the measurement state, and determines by t2 whether the interruption is due to the clock circuit 5 or to the electrical connection of the rain gauge. If the interruption is caused by the clock circuit 5, the power is turned on to each sensor at time t2.
Since each sensor outputs digital data such as a water level or a landslide amount, the central processing circuit 4 reads the digital data,
The data is converted into a predetermined data format, and the state shifts to a communication state at t3. At this time, the power supply to the sensor is turned off, and at the same time, a connection command is issued to the relay 13, and the modem 7, voice / data switch 8, network controller 9, satellite mobile phone 10, power supply circuit 12,
That is, power is supplied to the communication system device.

Next, in the communication state, data is transmitted from the observation station 1 to the monitoring station 2. Referring to FIG. 3, at time t3, the data collection device 3 instructs the satellite mobile phone 10 to make a dial call, and makes a call to the monitoring station 2. Here, the input / output standard of the data collection device 3 is based on RS-232C. The monitoring station 2 returns a character string indicating that the call has arrived to the observation station 1 as a response to the call. After confirming the incoming call response, the observation station 1 transmits the transmission data. The contents of the transmission data are given by the identification number of the observation station 1 itself, the transmission number: a serial number from the start of the observation station 1. Transmission time, measurement time: t3 and t
The line status can be grasped from the time difference of 4:00.
Rainfall integrated value, digital data, storage battery voltage: Maintenance data to know when to replace the storage battery. This is collation data. Regardless of the interruption, the measurement data transmits both the integrated rainfall value and the digital data. If the rain gauge is connected, the integrated rainfall value, the start signal from the clock circuit 5, the digital data, or both. If interrupt, update both data.

When receiving the transmission data from the observation station 1, the monitoring station 2 collates the transmission data with the collation data, and adds the collation result and a request to the observation station 1, such as a change in the cycle of the start signal, and the like as response data. Return to observation station 1. The observation station 1 collates the contents of the response data from the monitoring station 1 and, if there is a match, issues a command to disconnect the telephone and terminates the transmission. At the same time, a disconnection command is issued to the relay 13 to cut off the power supply to the communication system device. In this case, if there is an abnormality in the response from the monitoring station 2, the observation station 1 performs retransmission. The abnormality referred to here is a case where the verification data does not match, or a case where the response data from the monitoring station 2 is not returned within the time limit. In the case of retransmission, the procedure from time t3 is repeated. However, if there is no response despite several retransmissions, the transmission of the measurement data is abandoned, a command to disconnect the telephone is issued, and the transmission is performed. Terminate and turn off the power supply to the communication device.

Further, at time t4 in FIG. 3, it means the time of a call disconnection in both normal and abnormal cases. The reason why the number of retransmissions in case of abnormality is abandoned several times (here, set to four) is that the measurement target of this device is rainfall or water level,
Since it changes slowly, such as the amount of landslides, and does not generate singularities, even if one data is lost, it can be supplemented with the next data, and the purpose of disaster prediction Is not a problem.

On the other hand, when the rain gauge is electrically connected, t5
At the time, the state shifts to the measurement state, and it is determined that the interruption is caused by the electrical connection of the rain gauge by t6, and the rainfall is integrated by t7,
That is, the value is converted to a predetermined data format by adding +1 to the previous value. Since the rain gauge assumed in this device is of a falling type and does not require a power supply, the power supply to the sensor as in the case of a start signal from the clock circuit 5 is not performed. t7
The operation in the communication state from time t8 to time t8 is the same as in the case of the start signal from the clock circuit 5. If the electrical connection of the rain gauge and the generation of the start signal from the clock circuit 5 occur simultaneously or at a very close time, the above-described processing of the measurement state is performed in the order of integrating rainfall and reading digital data.
Note that, here, it is not assumed that the monitoring station 2 sends a transmission request to the observation station 1. However, in order to do so, in the communication procedure of FIG. By transmitting data as a response to

FIG. 4 shows another embodiment of the present invention.
In this embodiment, the mobile phone 11 and a commercially available data adapter 29 are used as communication devices. Therefore, according to this, it is possible to transmit observation data by installing it in an area where radio waves can reach sufficiently without using a satellite, and to reduce the number of components of the observation station as compared with the case of FIG. In addition to being able to be realized in a small office, there is an effect that power consumption can be reduced and the operation period using a storage battery can be further extended. Further, as shown in FIG.
It is also possible to transmit the observation data obtained at A, 1B,... 1N to one monitoring station 2. In this case, the monitoring data from all the monitoring stations 1A to 1N can be taken into the monitoring station 2 by retransmission at the time of abnormality or transmission in the form of accumulated rainfall.

[0022]

As described above, according to the present invention, the data collection device provided in the observation station is provided at regular intervals or /
And causing a central processing circuit, which receives an interrupt of a start signal at the time of electrical connection of the observation sensor, to collect and measure the observation data, and after completing the measurement of the observation data, supply power under the control of the central processing circuit. To the mobile phone
Since the observation data is configured to be transmitted to the monitoring station, by using an off-the-shelf mobile telephone and performing communication through the existing mobile telephone communication network, sensitivity adjustment or the like performed in the case of the dedicated wireless transceiver is performed. Is unnecessary, so that the circuit design, manufacture and special adjustment of the radio transceiver are not required when introducing the system, and the effect that installation and expansion of observation stations are facilitated is obtained.

In addition, while using a commercially available mobile phone, the power consumption can be reduced, the battery can be operated for a long period of time, so that it can be easily installed in an unmanned area such as a mountain area. In order to use a specific frequency, it is necessary to obtain a radio station license from the Telecommunications Bureau which has jurisdiction over the installation area. While the acquisition is obligatory, the present invention has the advantage that the type approval has already been obtained by the mobile phone manufacturer and there is no need to acquire a wireless license. In the case of a conventional dedicated radio transceiver, the visibility of radio waves is poor depending on the topography of the installation area, and a relay station is often installed between the observation station and the monitoring station. Since a communication network is used, there is an effect that a relay station is not required in any terrain.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a wireless observation system according to an embodiment of the present invention.

FIG. 2 is a timing chart showing signals or states of respective blocks in FIG.

FIG. 3 is an explanatory diagram showing a communication procedure performed between the observation station and the monitoring station according to the present invention.

FIG. 4 is a block diagram showing a wireless observation system according to another embodiment of the present invention.

FIG. 5 is a block diagram showing a wireless observation system according to another embodiment of the present invention.

[Explanation of symbols]

 1, 1A, 1B, 1N Observation station 2 Monitoring station 3 Data collection device 4 Central processing circuit 5 Clock circuit 11 Mobile phone 13 Relay (switch) 14 Storage battery A Data communication unit

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-9-127149 (JP, A) JP-A-50-62301 (JP, A) JP-A-4-96561 (JP, A) JP-A-6-127 284210 (JP, A) JP-A-6-291867 (JP, A) JP-A-7-87573 (JP, A) JP-A 7-104074 (JP, A) JP-A-10-124772 (JP, A) JP-A-10-224239 (JP, A) JP-A-6-189009 (JP, A) JP-A-7-129877 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) H04M 11/00-11/10 H04B 7/26 H04Q 9/00-9/16 G08C 17/00-17/06

Claims (5)

(57) [Claims] 1. A monitoring station transmits a signal received wirelessly from an observation station.
Therefore, in a wireless observation system for monitoring , a clock circuit is provided at the observation station and is generated at regular intervals.
Signal and / or rainfall from a falling rain gauge
Each time an electrical contact signal for adding a value is generated, an interrupt of a start signal is received, and the central processing circuit is provided with the rain gauge or
A data collection device for performing measurement of observation data from other observation sensors, and after completing the measurement of the observation data, receiving power supply under the control of the central processing circuit, and transmitting the observation data to the monitoring station. A central processing circuit, wherein the interrupt of the start signal is clockwise.
By road or by electrical contact signal from the rain gauge
And when it is determined that it is due to the clock circuit, the rainfall
Powering on observation sensors other than the
Wireless observation system and butterflies. 2. The wireless observation system according to claim 1, wherein the power supply to the observation sensor other than the rain gauge is stopped when the observation data is transferred to the communication state. 3. The data communication unit including the mobile phone is supplied with power from a storage battery via a switch that is activated when a transition to a communication state of observation data is made. Wireless observation system. 4. The communication according to claim 1, wherein the communication of the observation data is terminated when there is a collation match between the contents of the transmission data and the response data performed by the monitoring station and the observation station. Wireless observation system. 5. When there is an abnormality in the response from the monitoring station to the transmission of the observation data from the observation station, the observation station retransmits the observation data, and the response is obtained even if the retransmission is repeated a plurality of times. 2. The wireless observation system according to claim 1, wherein, if not obtained, transmission is terminated and power supply to the data communication unit is stopped.