JPS62299165A - Information communicating device - Google Patents

Abstract

PURPOSE:To prevent a terminal equipment from erroneously transmitting the data even at the time of a mischievous call and a wrong number by detecting the signal of a frequency in a sound band transmitted from a control center and when the signal of the frequency except a sound band is detected, judging to be the time when a multi-frequency signal is received from the control center. CONSTITUTION:In a terminal equipment, a # signal of a frequency (1477Hz) in a sound band transmitted from a control center 3 is detected by a detecting circuit A of a tone detecting circuit 23c and by a detecting circuit B, when the signal of a frequency (941Hz) except the sound band is detected, it is judged to be the time when a multi-frequency(#) signal is received from the control center 3. Thus, since a terminal equipment 2 can receive the multi-frequency(#) signal from the control center 3 without fail, even at the time of the mischievous call and the wrong number, it can be prevented that the terminal equipment 2 erroneously transmits the transmitting data.

Description

Detailed Description of the Invention 3. 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 signals of multiple frequencies.

[Conventional technology 1: Installing one automatic detector for gas, water, electricity, etc. in the house, and installing disaster prevention,
Safety equipment such as crime prevention and emergency equipment, meter reading information from automatic meter reading devices and safety information from the safety equipment city are converted into transmission signals by terminal devices, and the meter reading information or safety information is sent to the management center via public telephone lines. Information communication devices are beginning to be put into practical use for transmitting meter reading data and communicating meter reading data to a predetermined organization such as the gas ministry.

[Problems to be resolved by the invention] This information communication device transmits the meter reading information to the management center.
When transmitting safety information, ζ first sends the phone number of the management center, which is a data transmission signal, from the terminal device to the management center, and as a counter-signal, the management center sends a data transmission instruction signal to the terminal device. Only then can the meter reading information or safety information be sent to the management center.

However, since the data transmission instruction signal generally uses a signal with a frequency in the voice band, there is an inconvenience that the terminal device transmits meter reading information even in the case of a prank call or a mistaken call.

The present invention provides an information communication device that prevents a terminal device from erroneously transmitting data even in the case of a prank call or a mistaken call.

[Means for Solving the Problems] The information communication device of the present invention includes an automatic meter reader for gas, water, electricity, etc., a safety device for disaster prevention, crime prevention, first aid, etc., and meter reading information from the automatic meter reader. A terminal device including an electronic control circuit for inputting safety information from a safety device, and a management center to which the information is transmitted from the terminal device via a transmission path, and communication between the terminal device and the management center. In the information communication device, the electronic control circuit transmits a signal with a frequency within the voice band transmitted from the management center using a multi-frequency signal including a signal with a frequency within the voice band and a signal with a frequency outside the voice band. and a detection circuit B that detects a signal of a frequency other than the voice band, and when both of the detection circuits A and B detect the respective signals, the multifrequency signal is detected. A configuration was adopted.

[0° Use and Effects of the Invention] The information communication device of the present invention uses a detection circuit A to detect a signal with a frequency within the voice band transmitted from the management center, and uses the detection circuit A to detect a signal with a frequency outside the voice band. When a signal is detected, it is determined that a multi-frequency signal has been received from the control center, so even in the case of a prank call or a mistaken call, the terminal device can be prevented from accidentally sending data. Therefore, communication between the terminal device and the management center can be performed reliably.

[Example 1 FIG. 1 shows an embodiment of an information communication device of the present invention.

1 indicates an information communication device. 2 shows a terminal device installed in a house. ■ is a general subscriber telephone (hereinafter referred to as this telephone 1i1) that has a handset (not shown), push buttons (not shown) consisting of numeric signals from 0 to 9, and signals such as x1#, A, B, C, and D. call).

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

3.Hot the management center. The management center 3 is notified of various information about the house that is sent periodically or irregularly from the terminal device 2 via the public line, and depending on the information, sends information to a predetermined authority such as the gas network 4. When a report is made, personnel are dispatched, or a line is connected to the terminal device 2, a data transmission instruction signal (# signal is used in this embodiment), which is a multi-frequency signal, is sent to the terminal device 2, and the terminal This figure shows a management center that transmits a data retransmission request (# signal is used in this embodiment) signal, which is a multi-frequency signal, to the terminal device 2 when incorrect information is transmitted from the device 2.

The terminal device 2t 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 S.
1, and a detector (1 unit U) including an electronic control circuit.

Gas Make GM is an automatic needle detector that detects the flow rate of supplied gas to gas equipment, and is attached to a rotating body that rotates proportionally to the gas flow (the rotation of the 0-meter is detected by a ceramic sensor, and the flow rate is determined by Sends out a pulse signal proportional to .

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 the voltage is 0 when it is inoperable, 6 V when it is normal, and 1 when there is a gas leak.
Produces an output of 2V. The gas leak sensor S1 detects gas leakage in the house when the gas leakage in the house is higher than a predetermined level.

The meter reading unit U includes a human power interface 21 for the gas meter reading meter GM and the gas leak sensor S1, a central processing unit (Cr'U) 22, and a network iil+control unit (NOU) 2.
3, a communication connector 24 that connects the telephone to the management center 3 via a public telephone line, and a power supply 2 that is a nickel-cadmium battery (3,6V).
It consists of 5. The power supply 25 is charged by receiving power from the telephone office.

The input interface 21 is connected to the pulse human powered boat 21a1 gas leak sensor S, which is an input port of the gas meter GM.
It consists of a non-voltage input boat 21b, which is an input port of No. 1, and a spare boat 21c, which is an input port for an out-of-gas sensor, an out-of-battery sensor, a crime prevention sensor, a disaster prevention sensor, etc. (not shown).

The CPU 22 inputs the set value of the gas leakage flow rate, the automatic meter reading timer temporary transmission of gas meter reading information to the management center 3, the set voltage value of the power supply, the telephone number or code number of the user, and the telephone number or code of the management center 3. It is equipped with a storage device 4 for initial data such as numbers, a storage control device (not shown) for υ control procedures for the entire system, an automatic gas meter reading device 5, and a backup power source 6 that is a lithium battery (3). .

As shown in FIG. 2, the NCtJ 23 includes a line usage detection circuit 23a that detects the call mode, a 16Hz detection circuit 23b that detects when an M call is in progress, and a circuit according to the present invention that detects a multifrequency signal transmitted from the management center 3. Tone detection circuit 23C1 Dial transmission circuit 23d that inputs a transmission signal from a general subscriber telephone outside the residence, line switching relay 2
3e, a contact 23g of the DC circuit 23'' which is opened and closed, and a contact 23h for connecting the telephone.

When the tone detection circuit 23c detects a high frequency T within the voice band (for example, 1477Hz in the case of # signal), the tone detection circuit 23c inverts the output from high level to low level. When detecting a group frequency (for example, 941 Hz in the case of # signal), detection circuit B inverts the output from high level to [1- level, and when detection circuits A and B input # signal manually, that is, both ends When the input from the child is low level, the OR circuit C generates a low level output as a # signal detection signal, and the automatic level control circuit (
A, C) and a booster circuit E are provided.

The automatic level control circuit is a circuit that corrects the reception frequency received by the detection circuits A and B so that it becomes a reference value.

The back pressure circuit E will not operate unless the detection circuits A and B supply a voltage of 8V or higher, so the voltage of the detection circuits A and B should be set to 8V.
This is a circuit that boosts the voltage.

Furthermore, 23i is a diode bridge circuit, 23j is a diode, 23 is a resistor, 23j! 23m is an impedance transformer, and 23m is a voltage drop type transistor.

FIG. 3 shows a block for automatic gas meter reading in this embodiment.

Reference numeral 51 inputs six pulse numbers of the gas meter GM and a flow rate signal (pulse signal) through the pulse input port 21a, and also sends the pulse number to R1 to the tree mouth memory 'S52.
Indicates a number machine (count).

The accumulation storage unit 52 integrates the count signal from the counter 51, stores the division signal, and sends the accumulation signal to the comparator 53 and the reliability processing unit 54.

The comparator 53 compares the integrated value from the product storage unit 52 with the gas usage setting value, and outputs a signal when the product r5 value is a general fixed value.

The encoding processor 54 converts the product 1Δ bow into a transmission code and outputs it to the data processor 56 .

Gas leak sensor S1 outputs gas leak No. 13 to encoding processor 55 via non-voltage input port 21b. Encoding processor 55 converts the gas leak signal into a transmission code and outputs it to data processor 56 .

Data Office]! J! Z 5G ha, (n-issue punishment 354
．． 55 data are processed and sent to the NCU 23.

The NCU 23 controls data transmission 21 to the management center 3.
Do 1.

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

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

It is determined whether or not the gas meter reading data is sent to the automatic dial set for each house.18 It is determined whether the regular timer is on a temporary basis (1oi). The sending foot circumference timer is not one time (
No), there is a gas leak from the gas leak sensor S1 (No. ii (
12V) is being input (102).

When the gas leak signal (12V) is not manually operated (No),
Repeat (101).

If the transmission fixed timer is at one time (Yes 1 o'clock, or if a gas leak signal is input (Yes1R), then the line use detection circuit 23a determines whether the telephone is in use It is determined whether the call mode is detected (103). If the line usage detection circuit 23a detects the call mode (Yes), (103) is repeated.

When the line usage detection circuit 23a does not detect the call mode (NO), it is determined whether the 161-1z detection circuit 23b detects an incoming call in order to determine whether an @ call is being called from a telephone outside the residence. (104). 1
61-1z When the detection circuit 23b detects an incoming call (Yes), (103) is repeated.

When the 16Hz detection circuit 23b does not detect an incoming call (No), it outputs to the line 1 relay 23e and contacts 2.
3 (Close l and open contact 2311 to connect the telephone public line and the dialing circuit 23d to connect the DC circuit 23
Close f (105).

It is determined whether 3 seconds have passed since the DC circuit 23f was closed (106). If 3 seconds have not passed since the DC circuit 23f was closed (No), repeat (106). 3 seconds have passed since the DC circuit 23r was closed (ves
), dial the phone number of the management center 3, which is number 1, call the management center 3, and start automatic dialing (107). The tone detection circuit 23C receives the # signal which is the claw signal (to determine whether or not
It is determined whether the # signal is detected (108).

The tone detection circuit 23c is detecting the # signal (Yes
), that is, when the detection circuit A detects a high frequency (1477Hz) within the fame band of the # signal, it outputs a signal inverted from high level to [1- level to the OR circuit C. When B detects a low frequency (941 Hz) other than the fame band of the # signal, it outputs a signal inverted from high level to low level to OR circuit C.

Therefore, in OR circuit C, the human power from both terminals becomes low level, and the low level signal is used as the # signal detection signal.
When outputting to the CPU, transmission data such as gas meter reading data or gas leakage data is transmitted to the management center 3 using a transmission signal (109).

In (10B), when the tone detection circuit 23C does not detect the # signal (NO), it is determined whether or not the number of outgoing calls has reached three after automatic dialing (110).

When the number of calls has not reached 3 (NO), the output is output to the line switching relay 238 to open the contact 230, and the contact 23h is
and connect the telephone public line to this telephone IT.
The DC circuit 23f is opened (111). Thereafter, it is determined whether 5 seconds have elapsed (112>). If 5 seconds have not elapsed (No), (112) is repeated.

When 5 seconds have passed (Yes), repeat the steps below (103).

The number of calls has reached 3 (Yes, then determine whether 15 seconds have elapsed (113). If 15 seconds have not elapsed (NO), proceed to (111). After 15 seconds have elapsed (When Yes 1, outputs to line switching relay 23e to open contact 23(l), closes contact 2311 to connect public telephone line and main telephone line T, and opens DC circuit 23f ( 114).

Here, it is determined whether the second automatic dialing has been performed (115). If the second automatic dialing has not been performed (NO), it is determined whether five minutes have elapsed (116).

If 5 minutes have not elapsed (NO), repeat (116). If 5 minutes have passed (Yes), repeat steps (103) onwards.

Automatic dialing is performed twice (Yes at 1 o'clock, 3 o'clock)
Determine whether or not the second automatic dialing has been performed (117
). When automatic dialing is not performed for the third time (No),
It is determined whether 5 minutes have elapsed (118).

If 5 minutes have not passed (No), repeat (11B).

When 5 minutes have passed (Yes), repeat the steps below (103) again.

When automatic dialing is being performed for the third time (Yes), the operation is terminated. Here, the automatic meter reading regular timer old UL has never received a data sending instruction (#) from the management center 3.
) When the signal cannot be received, it is determined that some kind of accident has occurred between the terminal device 2 and the management center 3.

<109), after transmitting the transmission data using the transmission signal to the management center 3, the tone detection circuit 23c receives the # signal in order to determine whether or not it has received the data retransmission request (#) signal from the management center 3. It is determined whether or not it has been detected (119).

The tone detection circuit 23c is detecting the # signal (Ye
s), proceed to (110). Again, tone detection circuit 2
3c performs the # signal detection operation.

The tone detection circuit 23c does not detect the # signal (No
), then judge whether or not the accident occurred for 3 seconds (12
0). If 3 seconds have not elapsed (NO), repeat (119). When 3 seconds have elapsed (Yes), an output is sent to the line switching relay 23e to open the contact 23g, close the contact 23h, and connect the public line ML of the telephone to this telephone.
The DC circuit 23f is opened (121). After that, the operation ends.

That is, in this embodiment, in the terminal device, the detection circuit A of the tone detection circuit 23c detects the frequency (14771-1z) within the voice band transmitted from the management center 3.
It is determined that a multi-frequency (#) signal has been received from the management center 3 when the detection circuit detects a signal having a frequency (941 Hz) other than the voice band.

Therefore, since the terminal device 2 can reliably receive the multi-frequency (#) signal from the management center 3, it is possible to prevent the terminal device 2 from accidentally transmitting data even in the case of a prank call or a close call.

Therefore, erroneous transmission and reception between the terminal device 2 and the management center 3 can be prevented.

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 can go.

In this example, the power source is nickel h charged by local power supply.
I used Donium dry batteries, but a household AC power supply (100 mAh) was used.
V50/60Hz, ') may be used, or other power sources may be used.

In this embodiment, the # signal is used as a multi-frequency signal, but signals such as A, B, C, and D, which are multi-frequency signals dedicated to information transmission, may also be used. For example, if a PB receiver is used, multiple signals can be used. Further, any signal may be used as the receiving signal and the transmitting signal of the terminal device, as long as it is not a signal that is confused with a pulse signal of a general subscriber telephone or the like.

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 shows an example of the information communication device 111 of the present invention! ! l? l
2 is a schematic diagram of a meter reading unit according to an embodiment of the information communication device of the present invention, and FIG. 3 is a schematic diagram of a meter reading unit according to an embodiment of the information communication device of the present invention. The block diagram, FIG. 4, shows an operational flowchart of automatic dialing transmission control according to an embodiment of the information communication device of the present invention.

Claims (1)

[Claims] 1) An automatic meter reader for gas, water, electricity, etc., a safety device for disaster prevention, crime prevention, first aid, etc., and meter reading information from the automatic meter reader and safety information from the safety device are input. It is equipped with a terminal device including an electronic control circuit, and a management center to which the information is transmitted from the terminal device via a transmission path. In an information communication device using a multi-frequency signal with a signal of a frequency other than the frequency band, the electronic control circuit includes a detection circuit A that detects a signal of a frequency within the voice band transmitted from the management center; Detection circuit B that detects signals of frequencies other than
An information communication device comprising: detecting the multi-frequency signal when both of the detection circuits A and B detect their respective signals.