JPH03295398A - Remote supervisory equipment - Google Patents

Abstract

PURPOSE:To save communication charge by storing detection signals for the number of packets, which is previously decided in a memory, and transmitting the stored content by means of radio when the quantity of the stored content becomes the stored quantity of the previously decided number of the packets. CONSTITUTION:First and second terminal equipments 1 and 3 are connected through a digital radio network 2 and they constitute a teleterminal system. The first terminal equipment 1 is connected with the digital radio network 2 by radio and they can be installed in a desired place or they can be moved. They are provided with means 5 and 6 detecting physical analog information such as pressure or chemical analog information. When the digital value of the detection signals stored in the memory 19 are stored for the previously decided number of the packets, they are transmitted to the digital radio network 2, and the second terminal equipment 3 receives the detection signals, visibly displays and outputs them or prints them on a recording paper so as to output them. Thus, the line use quantity of the digital radio network can be reduced by storing the detection signals for the number of the packets and transmitting them.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a device for wirelessly performing remote monitoring using a digital wireless network called a so-called teleterminal system.

Conventional technology For example, there is a prior art technology that uses a pressure transmitter to detect the secondary pressure of a governor that adjusts the pressure of city gas, and transmits the detection signal to a long distance using a public telephone line or a dedicated wire for monitoring. do.

Problems to be Solved by the Invention In such prior art, since a public telephone line or a dedicated telephone line is used, it is not possible to detect the pressure at a desired point. This is inconvenient as it is not possible to monitor at the same location.

An object of the present invention is to provide a wireless remote monitoring device that can perform detection at any desired point and monitor at any other desired point.

Means for Solving the Problems In the present invention, a first terminal device and a digital wireless network are connected wirelessly, and a second terminal device and the digital wireless network are connected to each other wirelessly.
Nothing! The first and second terminal devices are connected by i, t or wired and are capable of transmitting and receiving via a digital wireless network, and the first terminal device includes means for detecting physical or chemical analog information; and a memory for sampling the detection signal of the detection means at predetermined time intervals, converting it into a digital value, and storing it for each predetermined number of packets, the storage content of the memory being for storing the predetermined number of packets. the second terminal device receives and outputs the detection signal from the first terminal device via the digital wireless network. It is a monitoring device.

Further, the present invention provides a first terminal device and a digital wireless network that are connected wirelessly, and a second terminal device and the digital wireless network that are connected wirelessly or wired, and the first and second terminal devices are connected to each other wirelessly. Transmission and reception are possible via a digital wireless network, and the second terminal device transmits a command signal instructing the first terminal device to transmit a detection signal, and the command signal is stored in the memory of the first terminal device. After receiving the detection signal, the detection signal is stored in the memory, and a predetermined number of packet distribution detection signals are transmitted from the first terminal device.

Further, the present invention provides a first terminal device and a digital wireless network that are connected wirelessly, and a second terminal device and the digital wireless network that are connected wirelessly or wired so that the first and second terminal devices can be connected digitally. Transmission and reception are possible via a wireless network, and the first terminal device includes means for detecting physical or chemical analog information, and sampling the detection signal of the detection means at predetermined time intervals and converting it into a digital value. and a memory for storing, the second terminal device wirelessly transmits the stored contents of the memory to the digital wireless network, and the second terminal device receives and outputs the detection signal from the first terminal device via the digital wireless network. and means for transmitting a command signal instructing the first terminal device to transmit a detection signal, the first terminal device comprising: control means for transmitting the stored contents of the memory in response to the command signal. A wireless remote monitoring device further comprising:

Further, in the present invention, the first terminal device and the digital wireless network are connected wirelessly, and the second terminal device and the digital wireless network are connected wirelessly or by wire, and the first and second terminal devices are connected to the digital wireless network. Transmission and reception are possible via a wireless network, and the first terminal device includes a detection means for detecting a physical or chemical analog signal, and a detection signal from the detection means that is sampled at predetermined time intervals and converted into a digital value. comprising a memory for converting and storing, a timer that ticks a predetermined time, and a transmitting means that wirelessly transmits the stored contents of the memory to a digital wireless network at time intervals predetermined by the timer, The second terminal device is a wireless remote monitoring device characterized by comprising means for receiving and outputting a detection signal from the first terminal device via a digital wireless network.

According to the present invention, the first and second terminal devices are connected via a digital wireless network to constitute a teleterminal system, and the first terminal device and the digital wireless network are connected wirelessly, so that It is also possible to install the first terminal device at a desired location and move it. The first terminal device is a means for detecting physical analog information such as pressure, such as a pressure transmitter, or chemical analog information, and samples the detection signal of this detection means at predetermined times using a timer or the like. When the digital value of the detection signal stored in this memory is stored for a predetermined number of packets (for example, one single packet),
The first terminal device transmits said number of packets stored in its memory to a digital radio network, and the second terminal device receives a detection signal from the first terminal device via this digital radio network. Then, output it as a visual display or as a print on recording paper. In this way, a predetermined number of packets are stored in the memory and transmitted, so when the packets are charged, the line usage of the digital wireless network can be reduced. It's advantageous.

Further, according to the present invention, a command signal is transmitted from the second terminal device, this command signal is received at the first terminal device via a digital wireless network, and this command signal transmits a detection signal from the first terminal device. After receiving this command signal, the first terminal device stores a detection signal in its memory, and stores a predetermined number of signals in this memory, for example, a single signal as described above. When the detection signal for packet distribution is stored, the detection signal for that number of packets is transmitted from the first terminal device, received by the second terminal device via the digital wireless network, and outputted.

In this way, when the second terminal device requires a detection signal from the first terminal device, it transmits a command signal, thereby transmitting a detection signal for each predetermined baguette portion from the first terminal device to the second terminal via the digital wireless network. Since the device receives and outputs the detection signal, it is possible to save costs when charging for each baguette as described above, and the detection signal can be sent to the second terminal device when desired. You can get it at

Further, according to the present invention, a command signal is transmitted from the second terminal device, and this command signal is given to the first terminal device via a digital wireless network, and the first terminal device stores the memory in response to the command signal. Send the store contents immediately. In this way, when a detection signal is needed at the second terminal device, the detection signal can be obtained immediately. At this time,
Transmission is performed regardless of the amount stored in the memory for a predetermined number of packets.

In addition, detection signals for a predetermined number of packets are stored in memory in the first terminal device, and the detection signals are
When the command signal from the second terminal device is received by the first terminal device, detection signals for the number of packets are sent out.

Further, according to the present invention, the first terminal device is provided with a timer, the timer ticks a predetermined time, and every predetermined time ticked by the timer,
The detection signal stored in the memory is wirelessly transmitted to the second terminal device via a digital wireless network. In this way, the detection signal can be obtained by the second terminal device at regular intervals set by the timer.

The timer is provided in a digital wireless network instead of being provided in the first terminal device, and the timer provided in the digital wireless network generates a command signal to transmit a detection signal from the first terminal device at predetermined intervals. You may also send
The timer is also provided in the second terminal device, and transmits a command signal from the second terminal device to the first terminal device via the digital wireless network, thereby periodically receiving the detection signal from the first terminal device. may be sent.

Example FIG. 1 is an overall block diagram of an embodiment of the present invention.

The first terminal device 1 is connected to the second terminal device 3 via a digital wireless network 2, and can transmit and receive data to and from the second terminal device 3. The first terminal device 1 and the digital wireless network 2 are, for example, 800
Connected via MHz band wireless. The second terminal device 3 and the digital wireless network 2 are connected, for example, wirelessly in the 800 MHz band or by wire. In this embodiment, the second terminal device 3
and the digital wireless network 2 are connected wirelessly. A pressure transmitter 5 is provided in a pipe line 4 that supplies fluid such as city gas to derive an electrical signal corresponding to the pressure of the fluid. The isolator 6, telemeter 9, line 10 and central monitoring device 11 are already installed, as indicated by reference numeral 25. The analog detection signal from this pressure transmitter 5 is applied via an isolator 6 and further via a line 7 to a processing circuit 8 realized by a microcomputer or the like. Said analog signal via this isolator 6 is also connected to line 1 from a telemeter 9 which sends an electrical signal to a remote location.
0 to the central monitoring device 11. The pressure transmitter 5, isolator 6, telemeter 9, etc. are powered by a constant voltage power supply 13, which is supplied with power from a commercial power source via line 12. The first terminal device 1 is also provided with a power outage detection circuit 14 that detects a power outage of the commercial power supply from the line 12, and this power outage detection signal is sent to the processing circuit 8.
given to. The pressure detection signal and the power outage detection signal via the processing circuit 8 are transmitted from the transmitting/receiving circuit 15 to the antenna 16.
is transmitted to the digital wireless network 2 as a light digital signal. The digital wireless network 2 has a configuration called a so-called teleterminal system.

The second terminal device 3 has a configuration similar to that of the first terminal device 1, and corresponding parts are shown with the same numbers and a subscript a.A transmitting/receiving circuit 15a is connected to an antenna 16a. A processing circuit 8a realized by a microcomputer or the like is connected to this transmission/reception circuit 15a, and the received pressure detection signal and power failure detection signal are visually displayed by a display means 17 realized by a cathode ray tube, liquid crystal, etc. . The display means 7 may be a printer that prints images on recording paper.

FIG. 2 is a diagram showing the configuration of a signal S used for communication between the first terminal W1 and the digital wireless network 2 in the embodiment of FIG. This signal S includes, following a start signal S1 representing the start thereof, a self-identification signal S2 inputted and set by the input means 18 for identifying the first terminal device 1, and a self-identification signal S2 for identifying the second terminal device 3. The monitoring data S4 includes a partner identification signal S3, monitoring data S4, and an end signal S5 indicating the end of this signal S. The monitoring data S4 includes a pressure detection signal, a power outage detection signal, etc. Consists of one packet consisting of 256 bytes,
The transmission and reception via the digital wireless network 2 is charged for each baguette, and the communication cost is calculated. Therefore, communication costs can be reduced by including as many pressure detection signals as possible in the monitoring data S4 in this one packet of signal S. Such a self-identification signal S2,
The partner identification signal S3 and the monitoring data S4 are processed by the processing circuit 8.
The data is temporarily stored in the memory 19 provided in the.

The first terminal device W, 1 is energized by the power source 20 for power failure protection even during a power outage of the commercial power supply via the line 12, thereby transmitting the stored contents of the memory 19 to the digital wireless network 2. Is possible. The other second terminal device 3 may also be configured to be powered by a power supply for power failure protection.

FIG. 3 is a flowchart for explaining the operation of the first terminal device 1. The gas pressure regulated by the governor in the line 4 passes from step e1 to step e2 and is detected by the pressure transmitter 5 as described above, the pressure detection signal being e.g. The data is digitized and stored in the memory 19 every three minutes as described below. In this step e2, the sampling timer ST is reset, and in step e3, the timer ST clocks.

In step e4, it is determined whether or not the clocking content of the timer ST corresponds to a predetermined time and a timeout has occurred. If so, the process moves to step e5, and the analog pressure detection signal is sent to the processing circuit 8. is read and digitized in step e6 and stored in the memory 19.
Stored in

It is determined whether the analog detection signal stored in the memory 19 has reached the storage capacity of the monitoring data S4 included in one packet. When there is sufficient storage capacity for the pressure detection signal stored in the monitoring data S4, the process moves to step e12, the timer ST is reset, and the process moves to step e3 again. In this manner, the pressure detection signal is stored in the memory 19 at predetermined time intervals set by the timer ST, for example, every three minutes.

When it is determined in step e7 that the storage capacity of the monitoring data S4 included in one packet of signal S is full, in step e8, the storage capacity of the monitoring data S4 included in one packet worth of signal S is reached, and in step e8 A communication line session is established with.

This signal S includes a partner identification signal S3, thereby forming a communication path with the second terminal device 3 having the same identification signal as the partner identification signal S3. In step e9, one packet of signal S is transmitted from the first terminal device 1, and data communication is performed. Thereafter, in step elo, the session is released and the communication path is cut off.

If the timer ST has not timed out in step e4, that is, if the time is less than the predetermined time of the timer ST after first sampling the pressure detection signal, the process moves to step e13 and checks whether an abnormality has occurred, for example, in the power failure detection circuit. 14, it is determined whether the occurrence of a power outage has been detected. If no abnormality has occurred, the process moves to step e20 and the session is released.

The processing circuit 8 is equipped with an abnormality timer DT, and this abnormality timer DT is reset. The abnormality timer DT performs a timing operation for a predetermined time, for example, every 10 seconds. The time set by the abnormality timer DT is set to be less than the predetermined time of the sampling timer ST.

If it is determined in step e13 that the occurrence of an abnormality has been detected, the process moves to step e14, and the abnormality timer DT
starts the clock operation and counts. In step e15, analog information as a power failure detection signal is given to the processing circuit 8, and in step e16, an abnormality signal is generated.
In step e17, the abnormal signal is digitized and stored in the memory 19. The abnormality signal may be a digitized signal of the power outage detection signal 14.

In step e17a, it is determined whether the abnormality timer DT has elapsed a predetermined time, for example, 10 seconds as described above, that is, whether it has timed out. When it is determined that the abnormality timer DT has timed out, a session is established in step e18, and the first and second terminal devices 1 and 3 are enabled to communicate via the digital wireless network 2, and step e]
In step 9, the monitoring data S4 including the abnormality signal is transmitted from the first terminal device 1. When an abnormality occurs in this manner, even if there is sufficient capacity of the monitoring data S4, an abnormality signal is sent from the first terminal device 1 at relatively short intervals determined by the abnormality timer DT. do. Although this abnormal signal may be only a pressure detection signal as described above, it may also be generated when an abnormal increase or decrease in pressure is detected by the pressure transmitter 5. Furthermore, an abnormal signal may be generated when other abnormal conditions occur.

FIG. 4 is a flowchart for explaining the operation of the second terminal device W3 in the embodiment shown in FIGS. 1 to 3. Moving from step f1 to step f2, it is determined whether there is a reception request from the first terminal f1. That is, it is determined whether the other party identification signal S3 included in the signal S of the first terminal device 1 matches the identification signal inputted and preset by the input means 18a in the second terminal device 3, and If so, the process moves to step f3, and a session is established in which a communication path is formed between the digital wireless network 2 and the second terminal device 3. In step f4, the signal S sent from the digital wireless network 2
The monitoring data S4 is received and stored in the memory 19a provided in the processing circuit 8. The display means 17 displays the pressure represented by the pressure detection signal included in the monitoring data S4 together with information for identifying the first terminal device 1.

When the monitoring data S4 received by the second terminal device 3 includes an abnormal signal, this is determined in step i7, and an alarm is activated by the display means 17 in step f8. That is, when this abnormality signal is received, the display means 17 displays that an abnormal state has occurred, and furthermore, a display member such as a lamp provided in the display means 17 blinks, or Generates an alarm sound.

In the above-described embodiment, the first terminal device 1 is configured so that the signal S is transmitted when the storage capacity of the monitoring data S4 of the signal S for packets becomes full during normal operation. However, as another embodiment of the present invention, when the capacity of monitoring data for a plurality of packets becomes full, the signals for the plurality of packets may be transmitted all at once.

FIG. 5 is a flowchart for explaining the operation of the first terminal device 1 according to another embodiment of the present invention. The embodiment shown in FIG. 5 is similar to the flowchart of the embodiment shown in FIG. 3 previously described, and corresponding steps are designated with the same numerals and reference character g. In this embodiment, a polling operation is performed for making a monitor request from the second terminal device 3 at every predetermined time. step g
1 to step g2, and when it is detected that a monitor request signal, which is a command signal via the digital wireless network 2, has been received from the second terminal device W3, the process moves to step g13, where the first terminal device 1 It is determined whether an abnormality has occurred, and if an abnormality has occurred, the third
Step g similar to steps e14 to e19 in the figure
14 to g19 are performed.

When it is determined in step g1B that no abnormality has occurred, the pressure detection signal is inputted to the processing circuit 8 in step g5, and in the next step g6, it is digitized and stored in the memory 9. In step g7, it is determined whether the detection signal has been stored for the storage capacity of the monitoring data S4 of the signal S for one packet, and if so, the signal S for one packet is transmitted in steps g8 to gll. . If there is enough storage capacity for one packet of the monitoring data S4 of the signal S, the process moves to step g14 and returns to step g5 again.

FIG. 6 is a flowchart for explaining the operation of the second terminal device 3 of the embodiment shown in FIG. The process moves from step h1 to step h1, and the sampling timer ST provided in the processing circuit 13a in this second terminal device 3 is reset. This sampling timer ST performs a timing operation at a predetermined time, for example, every 3 minutes.
In step h3, the timer ST starts counting. In step h4, it is determined whether or not the timer ST has timed out. If so, a communication path is formed in step h5 and the session is established. In step h6, a monitor request signal for polling is sent to the digital wireless network 2. is transmitted to the first terminal device 1 via.

In step h4, if the timer ST has not timed out, the process moves to step h3 and continues the clocking operation.

In this way, the second terminal device 3 makes a monitor request to the first terminal device 1 at every predetermined time by the sampling timer ST, and then stores the monitoring data S4 of the signal S for one packet. When the pressure detection signal is stored in the capacity, one packet of the signal S is transmitted from the first terminal device 1 to the second terminal device 3 via the digital wireless network 2 and monitored.

FIG. 7 is a flowchart for explaining the operation of the first terminal device 1 according to another embodiment of the present invention.

The first terminal device 1 performs step g7 shown in FIG.
is configured so that it is omitted. In this example, the second
It has a configuration in which a pressure detection signal is transmitted from the first terminal device 1 by polling from the terminal device, and steps shown by adding the letter i to the same numbers correspond to the steps e1 to e20 in FIG. 3 described above. When it is determined in i13 that no abnormality has occurred, a signal S including a pressure detection signal is transmitted in steps i5 to 111.

Such configurations are also included within the spirit of the invention.

When polling for making a monitor request is performed from the second terminal device 3 and a command signal is transmitted, even if there is sufficient storage capacity for the monitoring data S4 constituting the signal S, the polling immediately causes the signal S to be sent to the first Send from terminal Soka 1. Thereby, the second terminal device f3 can receive the pressure detection signal detected by the first terminal device 1 at a desired time.

FIG. 8 shows a first terminal device 1 according to still another embodiment of the present invention.
3 is a flowchart for explaining the operation in FIG.

Steps j1 to j20 in FIG. 8 correspond to steps e1 to e20 in FIG. 3, respectively, and similar operations are performed. Note that in this example, step j
2, not only the sampling timer ST but also the transmission timer TT is provided. Step j3~
In step j6, the pressure detection signal is digitized and stored in the memory 19 every three minutes, for example, at the time set by the sampling timer ST.

In step 7, it is determined whether the transmission timer TT has reached time alarm I after a predetermined period of time has elapsed;
If it has not timed out, the process returns to step j12. After the time determined by the transmission timer TT, for example, one hour has elapsed, steps j8 to step j
ll is executed. Other operations are similar to those of the previous embodiment.

In this way, in the embodiment of FIG. 8, the pressure detection signal is transmitted from the first terminal device 1 to the second terminal via the digital wireless network 2 at every time determined by the transmission timer TT. It is sent to device 3.

As yet another embodiment of the present invention, the transmission timer TT is
The terminal device 1 is provided in the digital wireless network 2, and every time the transmission timer TT provided in the digital wireless network 2
may be polled, and the pressure detection signal may be transmitted as part of the monitoring data S4. Further, as another embodiment of the present invention, the transmission timer TT is
may be provided.

The present invention is not only implemented for sensing gas pressure by a governor, but can also be widely implemented for sensing other physical or chemical analog information for remote monitoring.

Effects of the Invention As described above, according to the present invention, the first terminal device and the digital wireless network are connected wirelessly, the second terminal device and the digital wireless network are connected wirelessly or by wire, In this way, the detection signal from the first terminal device is received at the second terminal device, and therefore a detection signal at any desired point can be obtained at any desired point.

Moreover, according to the present invention, the detection signal is stored in the memory for a predetermined number of packets, and when the amount of the stored contents reaches the stored amount for the predetermined number of packets, the stored contents are transmitted wirelessly. Since the data is transmitted via the digital wireless network and received by the second terminal device via the digital wireless network, it is possible to reduce the communication fee in a configuration in which a fee is charged for each transmission of a packet.

Further, according to the present invention, the second terminal device transmits a command signal to perform so-called polling, and the first terminal device transmits a detection signal for sampling the predetermined number of packets. The detection signal can be obtained at the second terminal device for the number of packets at the same time, so that communication charges can be reduced, and
As described above, the detection signal can be obtained at a desired time.

Further, according to the present invention, by transmitting a command signal from the second terminal device so that the detection signal at the first terminal device can be immediately obtained by the second terminal device, the first terminal device can be sent to the first terminal device at a desired time. A detection signal can be obtained immediately.

Furthermore, according to the present invention, the first terminal device is provided with a timer,
Since this timer transmits the detection signal wirelessly at predetermined intervals and receives it at the second terminal device via the digital wireless network, the first terminal device can always obtain the detection signal periodically. It becomes like this.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is an overall block diagram of an embodiment of the present invention, FIG. 2 is a diagram showing the configuration of the signal S transmitted from the first terminal device 1, and FIG. 3 is a diagram showing the configuration of the signal S transmitted from the first terminal device 1. FIG. 4 is a flowchart for explaining the operation of the first terminal device l in the embodiment shown in FIGS. FIG. 5 is a flowchart for explaining the operation of the first terminal device 1 according to another embodiment of the present invention, and FIG. 6 is a flowchart for explaining the operation of the first terminal device 1 according to another embodiment of the present invention. FIG. 7 is a flowchart for explaining the operation of the first terminal device 1 of still another embodiment of the present invention, and FIG. 8 is a flowchart for explaining the operation of the first terminal device 1 of still another embodiment of the present invention. Terminal device 1
3 is a flowchart for explaining the operation of FIG. 1... First terminal device, 2... Digital wireless network, 3...
-Second terminal device, 5--Pressure transmitter, 8, 8a-Processing circuit, 14 Power outage detection circuit, ], 5.15a-Transmitting/receiving circuit, 16.1.6a-Antenna, 19.1.9a Memory, 20...Uninterruptible power supply

Claims (4)

[Claims] (1) The first terminal device and the digital wireless network are connected wirelessly, and the second terminal device and the digital wireless network are connected wirelessly or by wire, so that the first and second terminal devices connect to the digital wireless network. The first terminal device includes a means for detecting physical or chemical analog information, and a means for sampling the detection signal of the detection means at predetermined time intervals, converting it into a digital value, and converting it into a digital value. and a memory for storing every number of packets, and when the stored content of the memory reaches the storage amount for each of the predetermined number of packets, the second terminal device wirelessly transmits the data to the digital wireless network; A wireless remote monitoring device comprising means for receiving and outputting a detection signal from a terminal device via a digital wireless network. (2) The first terminal device and the digital wireless network are connected wirelessly, and the second terminal device and the digital wireless network are connected wirelessly or by wire, and the first and second terminal devices are connected to the digital wireless network. The second terminal device transmits a command signal instructing the first terminal device to transmit a detection signal, and the memory of the first terminal device stores the command signal after receiving the command signal. 2. The wireless remote monitoring device according to claim 1, wherein the detection signal is stored in a memory, and the first terminal device transmits the detection signal every predetermined number of packets. (3) The first terminal device and the digital wireless network are connected wirelessly, and the second terminal device and the digital wireless network are connected wirelessly or by wire, and the first and second terminal devices are connected to the digital wireless network. The first terminal device includes means for detecting physical or chemical analog information, sampling the detection signal of the detection means at predetermined time intervals and converting it into a digital value, the second terminal device includes an output means for receiving and outputting a detection signal from the first terminal device via the digital wireless network; means for transmitting a command signal instructing the first terminal device to transmit a detection signal; the first terminal device further comprises a control means for transmitting the stored contents of the memory in response to the command signal. A wireless remote monitoring device comprising: (4) The first terminal device and the digital wireless network are connected wirelessly, and the second terminal device and the digital wireless network are connected wirelessly or by wire, and the first and second terminal devices are connected to the digital wireless network. The first terminal device includes a detection means that detects a physical or chemical analog signal, and a detection signal of the detection means that is sampled at predetermined time intervals and converted into a digital value. , a memory for storing, a timer that ticks a predetermined time, and a transmitting means that wirelessly transmits the stored contents of the memory to a digital wireless network at time intervals predetermined by the timer, A wireless remote monitoring device characterized in that the second terminal device includes means for receiving and outputting a detection signal from the first terminal device via a digital wireless network.