JPS62299118A - Information communication equipment - Google Patents

Abstract

PURPOSE:To attain sure communication between a terminal equipment and a supervisory center by providing a correction circuit correcting a set code into a reference value in receiving the set code from the supervisory center by an electronic control circuit. CONSTITUTION:A tone detection circuit 23c is provided with an automatic level control circuit ALC 23i being a correction circuit, a reception code detection circuit 23j and a boosting circuit 23k. In supplying the setting code from the supervisory center to the reception code detection circuit 23j, if the distance between the supervisory center and a house is long or short, the reference value (reception level or voltage) of the reception code is increased or decreased. The circuit 23j cannot detect the reception code if it has a value of reception frequency or voltage reference. Then the ALC23i is provided to correct the reception frequency or voltage received bya the circuit 23j into a reference value thereby ensuring the communication between the terminal equipment and the supervisory center.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field] The present invention relates to an information communication device that performs communication between a management center and a terminal device using a setting code.

[Prior art] An automatic meter reading device for gas, water, electricity, etc. is installed in a house, and the meter reading information detected by the automatic meter reading device is converted into a transmission code by a terminal device, and the meter reading information is transmitted to a management center by telephone. BACKGROUND ART Information communication devices that transmit meter reading data via lines and communicate it to a predetermined organization such as a gas company are beginning to be put into practical use.

Therefore, after transmitting data from a terminal device to a control center, the applicant applied for a patent application in which a data retransmission request code is sent from the control center to the terminal device in the case of an error in the transmitted data. (Sho 60-251055).

[Problem to be solved by the invention] No. 71 for pressure (direct) pressure cannot be detected unless it is the (direct) reference 11r+, so the reception frequency or voltage flTi received by the terminal device 2 must be set as the reference (direct). It is necessary to compensate for pressure.

Sennen mother coffee = lie; Because of this, there were cases where communication between the terminal device and the management center could not be performed.

SUMMARY OF THE INVENTION The present invention provides an information communication device that can reliably detect a setting code in a terminal device, regardless of whether it is a long distance or a short distance, by using a single reference setting code transmitted from a management center.

[Means for Solving the Problems] An information communication device of the present invention includes a management center and a terminal device including an electronic control circuit that communicates with the management center,
[Function and Effects of the Invention] In the information communication device of the present invention, the information communication device performs communication between the two using a set code. It is possible to detect the setting code reliably regardless of whether the distance between the terminal device and the management center is long or short. Therefore, communication between the terminal device and the management center is reliable. can be done.

[Embodiment] Fig. 1 shows an information communication device having a terminal device set up according to an embodiment of the information communication device of the present invention.1゜1 indicates the information communication device. 2 shows a terminal device δ placed R511 in a residence. Wang uses a general subscriber telephone Ia (hereinafter referred to as main telephone), which has a handset (not shown), push buttons (not shown) consisting of numerical codes from O to 9, and codes such as x1#, AlB, C, and D. call).

and indicate public telephone lines, including switching systems (telephone offices, exchanges).

3 indicates the management center. The management center 3 is notified of various types of housing information that are sent periodically or irregularly from the terminal device 2 via the public line, and reports the information to a predetermined organization such as a gas company based on the information. When the line is connected to the terminal device 2, a setting code (# code is used in this example) is sent to the terminal device 2, and the terminal device 2 shows a management center that sends a data retransmission request (# code is used in this example) code, which is a setting code, to the terminal device 2 when erroneous information is sent from the terminal device 2.

Terminal i station 2 includes a gas meter reading meter (hereinafter abbreviated as gas meter) GM, which is an automatic gas meter reading device, and a gas leak sensor S1.
and a meter reading unit U including an electronic control circuit.

Gas meter GM is an automatic meter reader that detects the flow rate of supplied gas to gas equipment, and detects the rotation of a magnet attached to a rotating body that rotates proportionally to the gas flow rate using a 1a sensor element. Sends out a pulse signal proportional to the flow rate. In addition to automatic meter reading for gas, automatic meter reading for water, electricity, etc. may also be performed.

The gas leak sensor S1 is a safety device for gas equipment, and when it is inoperable, it is 0V, when it is normal, it is 6V, and when there is a gas leak, it is 1V.
Gas leak sensor +I$1, which generates an output of 2V, detects a gas leak in a house when the gas leak in the house exceeds a predetermined value.

The meter reading unit U is connected to the input interface 21 of the gas meter reading meter CM and the gas leak sensor S1, the central processing unit (CF"JJ) 22, the network control unit (NCU) 23, this telephone [and via the public line Management center 3
It consists of a communication connector 24 that connects terminals for connection, and a power source 25 that is a nickel cadmium dry battery (3.6V). The electric vA25 has been charged by receiving power from the telephone office and receiving a medical examination.

The input interface 21 includes a pulse input boat 21a, which is an input port of the gas meter GM, and a gas leak sensor S.
It consists of a non-voltage input boat 21b, which is an input port of No. 1, and a spare boat 21C, which is a human-powered boat, including a gas out sensor, a battery out sensor υ, and a crime prevention and disaster prevention sensor υ (not shown).

The CPU 22 transmits the set value of the gas leakage flow rate, the automatic meter reading timer time of the gas saving information to the management center 3, the set voltage value of the power supply, the user's telephone number or "-code number," and the telephone number of the management center 3. A recording device 4 for initial data such as a number or code number, a storage control device (not shown) for controlling the entire system, an automatic gas meter reading device 5, and a backup lithium battery (3). It is equipped with a power supply G.

As shown in FIG. 2, the NCU 23 includes a line usage detection circuit 23a that detects the call mode, a 161-1 detection circuit 23b1 that detects calling (calling), a tone detection circuit 23C1 that identifies the received code, and a line usage detection circuit 23C1 that detects the call mode. It is equipped with a dial dialing circuit 23d for inputting the outgoing signal of the telephone, a contact 23g of the DC circuit 23 which is opened and closed by the line cutter relay 23e, and a contact 23h for connecting the telephone.

The tone detection circuit 23c includes an automatic level control circuit (ΔL C) 23i which is a correction circuit according to the present invention, a received code detection circuit 23j, and a booster circuit 23.

Here, when the set code from the management center 3 is input to the reception code detection circuit 23j, if the distance between the management center 3 and the residence is long or short, the reference 1 (reception 2 or voltage) of the reception code is input. value) may go up or down.

The received code detection circuit 23j detects that the received code is the reference value of the reception frequency (for example, in the case of # code, the high frequency 1477 Hz
, low group 941Hz) or the standard voltage value, it cannot be detected. Therefore, by providing ALC23i,
The reception frequency or voltage value received by the reception code detection circuit 23j is corrected by the ALC 23i so that it becomes a reference value, so that communication between the terminal device 2 and the tube center 3 can be performed reliably.

Since the back pressure circuit 23 does not operate unless the received code detection circuit 23j supplies a voltage of 8<tb> or more, this circuit backpressures the voltage of the received code detection circuit 23j to 8ψ; t4<tb>.

More 23j! is a diode bridge circuit, 23m is a diode, 23n is a resistor, 23p is an impedance transformer, and 123q is a voltage transistor.

The operation of this embodiment will be explained based on the drawings.

FIG. 3 shows a flowchart of automatic gas meter reading in this embodiment.

51 is a π1 number i which inputs the flow rate signal (pulse signal) having the number of pulses from the gas meter GM via the pulse input port 21a, counts the number of pulses, and sends it to the integration memory 52.
'! Indicates S (count).

The accumulation storage device 52 integrates the count signal from the counter 51, stores the δ11 signal, and transmits the accumulated signal to the comparator 53.
and sends it to the encoding processor 54.

The comparator 53 compares the integrated value from the integrated memory 52 with the set value of the gas usage amount, and outputs a signal when the integrated value is normal.

The encoding processor 54 converts the integral signal into a transmission code; and outputs it to the data processor 56.

The gas leak sensor S1 receives a gas leak signal through a non-voltage input capacitor.
It is output to the encoding processor 55 via t-21b. The encoding processor 55 converts the gas leak signal into a transmission code,
The data is output to the data processor 56.

The data processor 56 processes the data of the encoding processors 54 and 55 and sends the data to the NCtJ 23.

The NCU 23 controls data transmission to the management center 3.

FIG. 4 shows an operational flowchart of automatic dial transmission control in this embodiment.

It is determined whether or not the fixed timer for transmitting gas meter reading data in the automatic dial set for each residence has reached one time (101). The transmission scheduled timer is not at one time (No
), the gas leak signal (12V
) is input (102). When the gas leak signal (12V) is not input (No), (10
Repeat 1).

When the scheduled transmission timer reaches one time (Yes) or when a gas leak signal is input (Yes), the main phone 1F
In order to determine whether the fT is in use, it is determined whether the line use detection circuit 23a detects the call mode (<103). The line usage detection circuit 23a detects the call mode (if Yes 1, repeat (103)).

When the line usage detection circuit 23a does not detect the call mode (NO), the line usage detection circuit 23b/f detects the call mode from the telephone outside the residence (161-1' detection circuit 23b/f to determine whether or not the iT is calling).
ii Determine whether or not a call is detected (10
4). When the 161-1z detection circuit 23b detects an incoming call (Yes), (103) is repeated.

When the 161-17 detection circuit 23b does not detect an incoming call (NO), it outputs an output to the line switching relay 238, closes the contact 23 (l), opens the contact 23h, and switches to the public telephone line and dials the call. Connect circuit 23d to create DC circuit 2
3f is closed (105).

It is determined whether 3 seconds have passed since the DC circuit 23f was closed (106). If 3 seconds have not elapsed since the DC circuit 23f was closed (NO), repeat (106). Three seconds have passed since the DC circuit 23f was closed (Yes
), calls the management center 3 and starts automatic dialing (107). In order to determine whether or not the # code, which is a data transmission instruction code, has been received from the management center 3, the reception code detection circuit 23j receives the # code and sends gas meter reading data or gas according to the transmission code to the erection tube immediate center 3. Send data such as leaked data (109). Here, the received code detection circuit detects the corrected # code.

Therefore, communication between the terminal device 2 and the management center 3 is
The connection between the terminal device 2 and the management center 3 can be established reliably regardless of whether the distance is long or short.

In (108), the receiving (fi code detection circuit 23j
When no code is detected (No), after automatic dialing, determine whether the number of calls has reached 3 (110
).

When the number of calls has not reached 3 (No), it outputs to the line switching relay 23e and opens the contact 23 (J).
Close h, connect this telephone to the telephone public line, and open DC circuit 23r (111).
It is determined whether seconds have elapsed (112). If 5 seconds have not elapsed (No), repeat (112).

5 seconds have passed (at YesSJ, repeat the steps below (103) again.

When the number of outgoing calls reaches three (Yes), it is determined whether 15 seconds have elapsed (113). If 15 seconds have not elapsed (No), go to (111). When 15 seconds have elapsed (Yes), an output is sent to the line switching relay 23e to open the contact 231J, close the contact 23h, connect the telephone's public line and this telephone, and switch the DC circuit 23f. (114).

Here, it is determined whether or not the second automatic dialing has been performed (115). The second auto-dial has not been performed (
NO), it is determined whether 5 minutes have passed (116).
). If 5 minutes have not passed (No), repeat (116). 5 minutes have passed (Yes 1 hour, (103) 1
・Repeat again.

When the second automatic dialing is being performed (Yes), determine whether the third automatic dialing has been performed (117).
. If the third automatic dialing has not been performed (NO), 5
It is determined whether the minutes have elapsed (118).

If 5 minutes have not passed (No), repeat (118).

5 minutes have passed (Yes, at 1 o'clock, repeat steps 1 and 1 from (103) again.

When automatic dialing is being performed for the third time (Yes), the operation is terminated. Here, when the automatic meter reading fixed timer is at one time, there is no data sending instruction (#) from the management center 3.
When the code cannot be received, the terminal device 2 and the management center 3
It is assumed that some kind of accident has occurred between the two.

. In (109), after transmitting the transmission data using the transmission code to the management center 3, the reception code detection circuit 23j determines whether or not a data retransmission request (#) code has been received from the management center 3. It is determined whether the # code is detected (119).

The received code detection circuit 23j detects the # code (Ye
s), proceed to (110). Here again, the # code corrected to the n code detection value is detected.

The received code detection circuit 23j does not detect the # code (N
O), then determine whether 3 seconds have elapsed (12
0). If 3 seconds have not elapsed (No), repeat (119). When 3 seconds have elapsed (Yes), it outputs to the line 1 change relay 23e, opens the contact 23(), and closes the contact 23h.
and connect this telephone T to the telephone public line.
The DC circuit 23r is opened (121). After that, the operation ends.

That is, in this embodiment, the terminal device 2 and the management center 3
The received code is automatically corrected to the standard value regardless of whether the distance between In addition, data reception can be controlled automatically on the management center 3 side, and when transmitting data, the data transmission instruction (#) code or data retransmission request (#) code is reliably sent from the management center to the terminal. Since the information is transmitted to the device 2, mutual communication between the terminal device 2 and the management center 3 is possible even if there is no personnel on the management center side.

In this embodiment, communication between the management center and the terminal device was carried out via a public telephone line, but communication between the management center and the terminal device was also carried out via a communication line or wirelessly using a communication satellite. You may do so.

In this example, a nickel-cadmium dry battery charged by local power supply was used as the power source, but a household AC power source (100
V50/601-IZ') may be used, or other power sources may be used.

In this embodiment, the # code is used as the setting code, but AXB, C, and D snow codes, which are multi-frequency codes dedicated to information transmission, may also be used, and codes that can be confused with pulse signals such as general subscription telephone numbers may also be used. Any other code may be used for the reception code and transmission code of the terminal device.

Furthermore, a display device such as a lamp or a buzzer may be attached to the meter reading unit to display the status when a general subscriber telephone is used or when a sensor outputs an output.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an embodiment of the information communication device of the present invention, FIG. 2 is a block diagram of a meter reading unit according to the embodiment of the information communication device of the present invention, and FIG. 3 is a schematic diagram of an information communication device of the present invention. 1 shows a flvJ flowchart of a set code detection system according to an embodiment of the present invention.

Claims (1)

[Scope of Claims] 1) An information communication device comprising a management center and a terminal device including an electronic control circuit communicating with the management center, and communicating between the two using a setting code, wherein the electronic control circuit An information communication device characterized by comprising a correction circuit that corrects a setting code to a reference value when receiving a setting code from a center. 2) The information communication device according to claim 1, wherein the reference value of the setting code is a reference value of a setting level, a setting voltage, or a setting current.