JP2001218284A - Information collection method and information collection system using single wireless communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information collection method and information collection system, using by a single wireless communication system employing radio waves of one frequency simplex system in a single communication channel, that can surely deliver information and cope with a rapid status change quickly. SOLUTION: When an observed value exceeds a predetermined value or a rapid change is shown in a short time, a slave unit transmits an emergency notice use transmission start signal to a master station. A receiver (RX) 34 of the master station, receiving the signal radio wave transmits an incoming detection signal (a) to a poling start circuit 36 to start a poling call circuit 33 so as to conduct poling processing similar to poling at regular intervals.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information collection method and an information collection system by a single wireless communication system using radio waves of a single frequency simplex system in a single communication path.

Also, the present invention is suitable for application to, for example, a telemeter system in which a master station collects predetermined information from a plurality of slave stations using radio waves of a single frequency simplex system in a single communication path. Information collection method and information collection system.

[0003]

2. Description of the Related Art As an information collection system in which a master station automatically collects predetermined information from a plurality of slave stations by using radio waves of a single frequency simplex system in a single communication path, for example, the information collection system is installed at a plurality of locations. There is known a so-called telemeter system in which a control station or a monitoring station serving as a master station collects observation data of an observation station serving as a slave station.

FIG. 3 shows the configuration of a general telemeter system of this kind. In the figure, 1 is a master station, and 2a to 2n are slave stations. 11 to 14 are constituent elements of the master station 1, 11 is a transmitting / receiving antenna, and 12 is a transmitting / receiving device (T
/ R), 13 is a timer device, 14 is a telemeter master (T
M (M)). 21 to 24 are slave stations 2a to 2 respectively.
2n are constituent elements, 21 is a transmitting / receiving antenna,
22 is a transceiver (T / R), 23 is a telemeter slave (T / R)
M (S)) and 24 are sensors (SENS).

FIG. 4 is a time chart showing the information collection procedure of the polling system in the general telemeter system shown in FIG. 3, wherein the master station 1 sequentially sends the slave stations 2a to 2n in time series. It shows a state in which calling (polling) is performed and transmission (T) and reception (R) for information collection are repeated.

[0006] This kind of conventional system is realized by a regular observation report system or a sequential observation report system.

[0007] In the regular observation report system, a master station that controls the entire system is provided in the system at a predetermined time (for example, every hour) by a clock device (timer) provided in the station. A call (polling) is performed to the slave station, and the called slave station returns a telemeter information signal in response to the call. Subsequently, a call (polling) is performed to another slave station in the system, and a telemeter information signal is sent back in the same manner. This call (polling)
By repeating the control for all the slave stations to be information collected, information can be sequentially collected from many slave stations without causing interference.

[0008] This regular observation report system is realized in an extremely general telemeter system such as rainfall and river water level. To cope with a sudden change in collected information, the collection time interval is shortened. Or, they can be collected manually at any time. However, there may be cases where it is not possible to cope with a sudden increase in river water level due to unpredictable local torrential rain.

In the sequential observation reporting method, in order to cope with a sudden change in the situation, which is a weak point of the above-mentioned regular observation reporting method, a predetermined level change, displacement, This is a method in which information is transmitted from the slave station to the master station every time the slave station occurs, and the information that changes every moment can be grasped in real time or near time. However, in this sequential observation reporting method, since one radio transmission channel (channel) is used, when two (or more) slave stations transmit simultaneously, one or all of them are caused by interference due to interference. Due to the drawback that there is a high likelihood of not being received, the fact is that it is not as widely used as the scheduled information transmission method.

As described above, the periodic information transmission method has a problem that it may not be possible to cope with a sudden change in the situation. In the sequential information transmission method, there is a problem that a single frequency simplex wireless line is used. In some cases, there is a problem that information may not be reliably transmitted due to interference.

[0011]

As described above, information of a telemeter system or the like in which a master station automatically collects predetermined information from a plurality of slave stations using a single frequency simplex radio wave in a single communication path. In the collection system, there is a problem that it may not be possible to respond to sudden changes in the regular information transmission system, and in the sequential information transmission system, there is a case where information cannot be transmitted reliably due to interference. There was a problem that it could be born.

The present invention has been made in view of the above circumstances,
In an information collection system based on a single wireless communication system using radio waves of a single frequency simplex system in a single communication path, information can be reliably transmitted, and a single communication system capable of quickly responding to a sudden change in situation. An object of the present invention is to provide an information collection method and an information collection system using one wireless communication system.

[0013]

SUMMARY OF THE INVENTION The present invention relates to an information data collecting method applied to a system for automatic observation or automatic notification using a single frequency simplex radio wave in a single communication path. , A scheduled information transmission method by timer control,
It has a transmission means having a sequential information transmission method not based on a timer control, wherein information is transmitted by a regular information transmission means in a normal state, and information is transmitted by a sequential information transmission means in an emergency.

The present invention is also an information collecting method applied to a system in which a master station collects predetermined information from a plurality of slave stations using a single frequency simplex radio wave in a single communication path. In a normal state, information collection is performed by a periodic report based on a timer control of a master station, and in an emergency, information collection is performed by a sequential report not performed by the timer control.

The present invention is also an information collecting method applied to a system in which a master station collects predetermined information from a plurality of slave stations using a single frequency simplex radio wave in a single communication path. The master station normally collects information from each slave station by starting the regular polling under the control of the timer of the master station by the timer control of the master station, and performs polling similar to the regular polling when detecting an incoming call from the slave station during a period other than the regular polling. It is characterized in that information is collected from each slave station upon activation.

The present invention also provides a system in which a master station collects information from a plurality of slave stations by polling control using radio waves of a single frequency simplex method in a single communication path. A timer for starting polling, a means for starting regular polling for executing polling under the control of the timer, a report detecting means for receiving and detecting a report from a slave station outside the regular polling period, and a report from the report detecting means. A sequential polling starting means for executing polling at the time of detection.

The present invention also provides the above-mentioned system, wherein the slave station has means for transmitting an emergency call transmission start signal to the master station when the observed value or the measured value exceeds a prescribed value. Receives the signal, and sequentially starts polling by using the signal as a trigger.

Further, the present invention provides the above system, wherein the slave station generates an emergency notification transmission start signal, and the output of the transmission start signal is stopped for a predetermined time when a polling signal is received from the master station. Means for avoiding overlap between the transmission output of the transmission start signal and the transmission output due to polling of another slave station.

As described above, the present invention is an information collecting method and an information collecting system by a single radio communication system suitable for a telemeter system or the like comprising one master station and at least one slave station. Specifically, a timer device for starting a polling (sequential calling) operation to a slave station at the time of regular observation and a polling operation of the slave station at the time of sequential observation are also provided to the master station. A notification reception detection circuit for starting is provided. On the other hand, the slave station has a periodic transmission start circuit that performs periodic transmission for information transmission in response to a polling call operation from the master station at the time of periodic observation, and a sequential transmission that spontaneously transmits at the time of sequential observation. A transmission start circuit is provided. By providing such a functional circuit, a telemeter system using both the regular information transmission method and the sequential information transmission method is realized. In this system operation, a timer device automatically polls (sequentially calls) each slave station at a predetermined time as a regular information transmission method in normal times, and information collected by the slave station is transmitted to the master station. Information is collected. On the other hand, for example, when the river water level suddenly increases due to local heavy rain, etc., when a preset water level or a change in water level is detected, the transmission operation is automatically performed from the slave station side. . Upon receiving this radio wave, the master station immediately performs polling operation on all the slave stations including the transmitting slave station, and collects information of each slave station in the same manner as in the above-mentioned periodic information collection.

As described above, the master station does not need any content (such as a transmitting slave station identification signal) contained in the radio wave from the slave station.
Because the master station only starts receiving information by receiving radio waves,
Even if two (or more) slave stations transmit simultaneously, information collection for each slave station can be executed without any trouble.

[0021]

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

FIG. 1 is a block diagram showing the configuration of a master station according to an embodiment of the present invention. Here, the same components as those shown in FIG. 3 are denoted by the same reference numerals.

In the figure, 11 to 14 are components of the master station 1, respectively, 11 is a transmitting / receiving antenna, 12 is a transceiver, 13 is a timer device, and 14 is a telemeter master (T).
M (M)).

Reference numerals 31 to 36 denote components of the transceiver 12 provided in the master station 1 of the system according to the embodiment of the present invention.
NT-SW), 32 is a transmitter (TX), 33 is a polling calling circuit, 34 is a receiver (RX), 35 is a delay circuit (DELAY), 36 is a polling activation circuit, and 37 is a transmission activation circuit.

Transmission / reception switch (ANT-SW) 31
Performs switching between transmission and reception of the transmission / reception antenna 11 based on the transmission activation signal output from the transmission activation circuit 37 for single wireless communication.

The transmitter (TX) 32 includes a calling signal output from the polling calling circuit 33 and a transmission starting circuit 37.
In accordance with the transmission start signal output from the mobile station, a paging signal for information collection is sequentially wirelessly transmitted to each slave station.

The polling calling circuit 33 generates a calling signal for calling each slave station based on the polling start signal output from the polling starting circuit 36, and generates a calling signal (T
X) and sends a transmission timing control signal to the transmission activation circuit 37.

The receiver (RX) 34 receives a response signal (telemeter information) transmitted from the slave station via the antenna 11 and the antenna transmission / reception switch (ANT-SW) 31 at the time of execution of the periodic polling. Then, the response signal (telemeter information) (b) is sent to the telemeter master (TM (M)) 14, and the radio signal (emergency call) sent from the slave station when the regular polling is not executed is performed. When the transmission start signal is received, the reception detection signal (a) is transmitted to the delay circuit (DELAY) 35.

The delay circuit (DELAY) 35 is connected to the receiver (R
X) When receiving the incoming call detection signal (a) from 34, the signal is delayed for a predetermined time (for example, about 0.5 seconds), and the polling activation circuit 36 is used as an activation signal for successive polling.
To send to.

The polling activation circuit 36 is provided for the timer device 14
When a start signal for regular polling is received or when a start signal for sequential polling is received from the delay circuit (DELAY) 35, the start signal is sent to the polling calling circuit 33.

The transmission starting circuit 37 is a polling calling circuit 3
3 according to the timing control signal for polling call output from the transmission / reception switch 3 (ANT-SW) 3
1 and a transmission start signal is transmitted to the transmitter (TX) 32, the transmission / reception switch (ANT-SW) 31 is switched to the transmission mode, and the transmitter (TX) 32 is activated.

FIG. 2 is a block diagram showing the configuration of a slave station according to the embodiment of the present invention. Here, the same components as those shown in FIG. 3 are denoted by the same reference numerals.

In the figure, reference numerals 21 to 24 denote slave stations 2a to 2a, respectively.
2n are constituent elements, 21 is a transmitting / receiving antenna,
22 is a transceiver, 23 is a telemeter slave (TM)
(S)) and 24 are sensors (SENS).

Reference numerals 41 to 47 each constitute a component of the transceiver 22 provided in the slave station 2 of the system according to the embodiment of the present invention.
NT-SW), 42 is a transmitter (TX), 43 is a receiver (RX), 44 is a transmission activation circuit, 45 is a transmission activation stop circuit, 46 is a called circuit, and 47 is a delay circuit (DELAY).
It is.

The telemeter slave unit (TM (S)) 23 is used when the information processing result (observed value or measured value) of the slave unit exceeds a predetermined level or when a sudden displacement occurs in a short time. , An emergency call transmission start signal (c) is output.
Further, it outputs observation (measurement) data of the sensor (observation equipment or the like) 24 as a response signal (telemeter information) (d).

Transmission / reception switch (ANT-SW) 41
Performs switching between transmission and reception of the transmission / reception antenna 21 based on the transmission activation signal output from the transmission activation circuit 44 for single wireless communication.

The transmitter (TX) 42 includes a transmission start circuit 44
In response to the start control, a response signal (telemeter information) (d) at the time of regular polling or an emergency notification transmission start signal (c) for successive polling start is wirelessly transmitted to the master station 1.

The receiver (RX) 43 receives the polling signal (call signal) transmitted from the master station 1 via the antenna 21 and the transmission / reception switch (ANT-SW) 41 and demodulates the polling signal to the called circuit 46. Send out.

The transmission start circuit 44 includes a delay circuit (DELA)
Y) The activation of the transmitter (TX) 42 is controlled in accordance with a calling signal addressed to the own station input via 47 or an emergency notification transmission activation signal (c) input via the transmission activation stop circuit 45.

The transmission start / stop circuit 45 includes a called circuit 46.
While the transmission stop signal is being received, the transmission start signal (c) for emergency notification received from the telemeter slave (TM (S)) 23 is invalidated.

The called circuit 46 determines which of the slave stations the signal received by the receiver (RX) 43 is a calling signal for, and when the signal is a calling signal addressed to its own station, the called circuit 46 converts the signal into a delay circuit ( (Delay) 47 to the transmission start circuit 44, and when a call signal including other slave stations is detected, sends a transmission stop instruction signal to the transmission start / stop circuit 45.

Here, the operation in the embodiment of the present invention will be described with reference to the above-mentioned drawings.

First, the processing at the time of scheduled polling will be described.

In the master station 1, when a predetermined telemeter observation time comes, a start signal is output from the timer device 13. The polling activation circuit 36 operates in response to the activation signal to activate the polling calling circuit 33, and the polling calling circuit 33 sequentially outputs a calling signal to each of the slave stations 2a to 2n to the transmitter (TX) 32.
The transmission timing control signal is output to the transmission activation circuit 37 each time.

At this time, upon receiving the transmission timing control signal from the polling calling circuit 33, the transmission starting circuit 37 drives the transmitter (TX) 32 and the transmission / reception switch (ANT-SW) 31 each time. , Antenna 11
In accordance with a predetermined polling order, a call signal is transmitted and output to each of the slave stations 2a to 2n (see FIG. 3) which are call control targets.

That is, when the transmission start circuit 37 receives the first transmission timing control signal from the polling calling circuit 33, it drives the transmitter (TX) 32 and the transmission / reception switch (ANT-SW) 31. First, the antenna 11 transmits and outputs a call signal to the slave station 2a (see FIG. 3).

When the sending of the calling signal to the slave station 2a is completed, the polling calling circuit 33 stops driving the transmission starting circuit 37, stops the transmission output of the transmitter (TX) 32, and sets the transmission / reception switch ( ANT-SW) 31 is switched to the receiving side, and the receiver (RX) 34 is further operated to receive and demodulate a response signal (telemeter information) radio wave from the slave station 2a.

The response signal (telemeter information) received and demodulated by the receiver (RX) 34 is transmitted to a telemeter master (T).
M (M)) 14.

A series of operations from the calling to the response and the collection (recording) of the telemeter information are executed according to a predetermined time relationship and procedure (sequence).
After the series of polling processes for the slave station 2a, the process shifts to a series of polling processes similar to the above for the slave station 2b (see FIG. 3), and thereafter, sequentially to the slave stations 2n (see FIG. 3). Executed until

At the time of the periodic polling, each of the slave stations 2a to 2
n receives a polling call signal from the master station 1,
It is determined whether or not the received calling signal is a signal addressed to the own station, and when a calling signal addressed to the own station is detected, telemeter information such as an observation value output from the telemeter master (TM (M)) 14 is output. Is transmitted to the master station 1 as a response signal.

For example, in the slave station 2a, the receiver (RX)
When receiving the call signal transmitted from the master station 1 via the antenna 21 and the antenna switch 41, the demodulator 43 demodulates the signal and sends it to the called circuit 46. The called circuit 46 determines which of the slave stations the received calling signal is for, and if the calling signal is for the own station, drives the transmission starting circuit 44. At this time, a delay circuit (DELA) interposed between the called circuit 46 and the transmission activation circuit 44
Y) 47 is provided with a waiting time for detecting and determining a calling signal in the called circuit 46. Upon receiving a call signal from the called circuit 46, the transmission starting circuit 44
The transmitter (TX) 42 and the transmission / reception changeover switch (ANT-
SW) 41 to drive the telemeter slave (TM (S))
The telemeter information (d) output from 23 is transmitted to the transmitter (TX) 42 and the transmission / reception switch (ANT-SW) 4
1 and to the master station 1 (see FIG. 3) via the antenna 21.

Next, the processing at the time of successive polling will be described.

In the slave 2i (i = a / b /... / N), for example, if the observed value exceeds a predetermined value or shows a rapid change in a short time, (TM (S)) 23 is an emergency call transmission start signal (c).
Is output. When the transmission start circuit 44 receives the emergency report transmission start signal (c), the transmission start circuit 44 drives the transmitter (TX) 42 and the transmission / reception switch (ANT-SW) 41 to transmit the transmission (TX) 42 and the transmission / reception switch. Switch (ANT-S
W) and the transmission start signal for emergency notification is transmitted to the master station 1 via the antenna 21.

In the master station 1 (see FIG. 3), the receiver (R
X) 34 receives the signal radio wave via the antenna 11 and the transmission / reception switch (ANT-SW) 31 and outputs an incoming call detection signal (a). The signal is delayed by a delay circuit (DELAY) 35 for a predetermined time (about 0.5 seconds).
After the delay, it is sent to the polling activation circuit 36. Upon receiving the incoming call detection signal, the polling starting circuit 36 starts the polling calling circuit 33, and the polling calling circuit 33 sequentially outputs a calling signal to each of the slave stations 2a to 2n to the transmitter (TX) 32. Polling processing similar to the regular polling is executed.

At this time, in either of the regular polling and the sequential polling, during the observation operation of the slave station, an emergency notification transmission start signal (c) is output from one of the slave stations, and the transmission operation associated therewith is executed. Then, there is a possibility that the transmission radio wave and the call / response radio wave at the time of polling may interfere with each other. In order to avoid this inconvenience, in this embodiment, when a call signal of the called circuit 46 is detected, transmission activation stop for prohibiting transmission activation by the emergency notification transmission activation signal (c) for a certain period of time. A circuit 45 is provided, and the slave station side transceiver 2 is provided.
A certain period of time (4 to 5 seconds) from the time when the polling signal (call signal) for the child station is detected in the called circuit 46 of No. 2
Stops driving of the transmission start circuit 44 by the emergency call transmission start signal (c). That is, the master station 1 (FIG. 3)
) Enters a regular polling or sequential polling operation and sends out a slave station call signal for polling, all the slave stations 2a to 2n (see FIG. 3) receive the call signal except for their own station. , The signal cannot be transmitted for a certain period of time (4 to 5 seconds) after receiving the signal, so that the signal is not transmitted at the same time as other child stations. Can be prevented.

As described above, according to the embodiment of the present invention, both the regular observation method using the timer control and the sequential observation method not using the timer control are used. By collecting telemeter information at times by sequential polling, telemeter information can be collected reliably, and it is possible to immediately respond to a sudden change in the situation, such as a sudden increase in the level of a monitored river.

[0057]

As described above, according to the present invention,
In an information collection system based on a single wireless communication system using radio waves of a single frequency simplex system in a single communication path, information can be reliably transmitted, and a single communication system capable of quickly responding to a sudden change in situation. An information collection method and an information collection system by one wireless communication system can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a master station according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a slave station in the embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a general telemeter system.

FIG. 4 is a time chart showing an example of collecting polling information in the system shown in FIG. 3;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Master station 2a-2n ... Slave station 11 ... Transceiver antenna 12 ... Transceiver 13 ... Timer device 14 ... Telemeter master unit (TM (M)) 21 ... Transmitter / receiver antenna 22 ... Transceiver 23 ... Telemeter slave unit (TM (S )) 24 sensor (SENS) 31 transmission / reception switch (ANT-SW) 32 transmitter (TX) 33 polling calling circuit 34 receiver (RX) 35 delay circuit (DELAY) 36 polling activation circuit 37 ... Transmission start circuit 41 ... Transmission / reception changeover switch (ANT-SW) 42 ... Transmitter (TX) 43 ... Receiver (RX) 44 ... Transmission start circuit 45 ... Transmission start stop circuit 46 ... Called circuit 47 ... Delay circuit (DELAY) (A) ... incoming call detection signal (b) ... response signal (telemeter information) (c) ... emergency call transmission start signal (d) ... response signal (telemeter Broadcast)

Continuation of the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) G08C 17/00 G06F 15/74 320D H04B 17/00 G08C 17/00 Z (72) Inventor Yasushi Tahara Hino-shi, Tokyo (72) Inventor Hiroaki Nakamura 4-1-1 Asahigaoka, Hino-shi, Tokyo F-term (reference) 2F073 AA01 AB01 BB01 BC02 CC03 CC08 DD02 DE02 DE13 DE16 FF01 FF15 GG01 GG07 5C087 BB20 BB39 BB51 BB74 DD02 DD49 EE08 FF01 FF04 FF17 GG08 GG30 GG42 GG43 GG54 GG70 GG83 5K042 AA08 BA11 CA02 JA01 BA01 JA03 BA01 JA03 MA02 EB02 EB10 HA01 HA02

Claims (6)

[Claims] 1. An information data collection method applied to a system for automatic observation or automatic notification using radio waves of a single frequency simplex method in a single communication path, wherein a timed information transmission method by timer control is provided. And a transmission means having a sequential information transmission method that does not rely on timer control, wherein information is transmitted by a regular information transmission means during normal times, and information is transmitted by the sequential information transmission means in an emergency. Information data collection method using a single wireless communication method. 2. An information collecting method applied to a system in which a master station collects predetermined information from a plurality of slave stations by using radio waves of a single frequency simplex method in a single communication path, The information collection method according to the single wireless communication system, wherein the information collection is performed by a regular notification under the timer control of the master station, and the information is collected by the sequential notification without the timer control in an emergency. 3. An information collection method applied to a system in which a master station collects predetermined information from a plurality of slave stations using a single frequency simplex radio wave in a single communication path. The station collects information from each of the slave stations by regular polling activation by the timer control of the master station in a normal time, and detects an incoming call from the slave station during a period other than the regular polling, similar to the regular polling. Collecting information from each of the slave stations by initiating polling. 4. A system in which a master station collects information from a plurality of slave stations by polling control using radio waves of a single frequency simplex method in a single communication path, wherein the master station starts periodic polling. A polling start-up means for executing polling under the control of the timer, a report detecting means for receiving and detecting a report from the slave station outside the regular polling period, and a report from the report detecting means. An information collecting system using a single wireless communication method, comprising: a successive polling starting means for executing polling at the time of detection. 5. The slave station has means for transmitting an emergency notification transmission start signal to the master station when an observed value or a measured value exceeds a prescribed value, and the master station receives the signal. 5. The information collection system according to claim 4, wherein the polling is sequentially started by using this as a trigger. 6. The slave station further comprises means for generating an emergency notification transmission start signal, and means for stopping output of the transmission start signal for a predetermined time when a polling signal is received from the master station, 5. The information collecting system according to claim 4, wherein the transmission output of the transmission start signal and the transmission output by polling of another slave station are avoided.