JP2829482B2 - Communication terminal device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication terminal device provided with a clock IC for generating time data and issuing a periodic notification to a center device based on the time data.

[0002]

2. Description of the Related Art A communication terminal device of this kind is disposed on an outer wall or the like of each home, and periodically sends gas meter reading information to a center device. This is to be reported. Such a communication terminal device includes a CPU in addition to the above-described clock IC,
In addition, a local power supply such as a battery is used as a power supply of the apparatus without using a commercial power supply. In such a communication terminal device, power such as a battery is always supplied to the clock IC, but if this power is supplied to the CPU as an operating power, the battery is consumed and must be replaced frequently. For this reason, the CPU is normally kept in the sleep state, which is the low power consumption mode, and is woken up from the sleep state once every 8 seconds, for example. Then, the time data of the clock IC is read by the wake-up CPU. If the time data is data of a predetermined date, the above-described gas meter reading information and the like are transmitted from the CPU to the center device. After that, the CPU is set to the sleep state again.

[0003]

In such a communication terminal device, the contents of the memory for storing the time data in the timepiece IC may be destroyed due to a lightning strike to the surroundings or the like. In such a case, the conventional communication terminal device does not transmit the meter reading information to the center device even after the designated date, and the center device does not have a communication function from the center device to the communication terminal device. There is a problem that it is necessary to go to the installation location of the device and correct the time.

Accordingly, it is an object of the present invention to provide a communication terminal device which issues a periodic notification to a center device even when time data of a clock IC becomes abnormal.

[0005]

SUMMARY OF THE INVENTION In order to solve such a problem, the present invention provides a storage means for storing time data generated from a clock IC at predetermined intervals, and a method for storing time data in the storage means. Comparing means for comparing the time data with the previously stored time data, and when a predetermined error occurs in the comparison result by the comparing means, a report is sent to the center device, and the center device returns the report to the report. Control means for storing the time data in the storage means and setting the time data in the clock IC.

[0006]

When a regular alarm is issued based on the time data generated from the clock IC, the time data is compared with the time data previously stored in the storage means, and if a predetermined error occurs in the comparison result, the center is determined. A notification is sent to the device, and the time data returned from the center device in response to the notification is stored in the storage means and set in the clock IC. As a result, even when the data of the clock IC is destroyed by external noise, accurate time data can be secured, and therefore, the meter reading information can be issued to the center device on the designated date.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing one embodiment of a communication terminal device according to the present invention. In FIG. 1, reference numeral 1 denotes a communication terminal device, and each terminal is connected to a telephone 2, a voltage alarm 3, a non-voltage alarm 4, an external sensor 5, a handy terminal 6, and electronic meters 7, 8, respectively. At the same time, it is connected to a telephone line (hereinafter referred to as line) L, and periodically sends gas meter reading information and the like to a center device (not shown) via the line L.

Here, the communication terminal device 1 is configured as follows. That is, 11 is a protection circuit for protecting the apparatus against overvoltage or the like from the line L, 12 is a filter for removing noise from the line L, 13 is an incoming detection circuit for detecting an incoming call arriving on the line L, 14 is A hook detection circuit for detecting a hook state of the connected telephone 2, and a hook detection circuit 15
A PB receiver that receives the B signal, 16 is a 1650 Hz detection circuit that detects a signal with a frequency of 1650 Hz from the center device via the line L, and 17 is a PB that generates a PB signal
The B generator 18 is an attenuator.

An outlet disconnection monitoring unit 19 detects the outlet of the connected voltage alarm 3 and 20.
Is a voltage alarm monitoring unit that detects information of the voltage alarm 3, 21 is a voltage alarm monitoring unit that detects information of the connected voltage alarm 4, and 22 is information of the external sensor 5. An external sensor monitoring unit 23 is a handy terminal connection interface for exchanging data with the handy terminal 6 connected via the connector CN.
Reference numeral 26 denotes a telegram meter connection interface for inputting information from the connected telemeters 7 and 8, and reference numerals 25 and 27 denote disconnection / short-circuit monitoring units for detecting disconnection and short-circuit of the connected telemeters 7 and 8, respectively. is there.

Reference numeral 28 denotes a ROM 28A and a RAM 28
B that incorporates B and controls the entire communication terminal device 1;
Reference numeral 9 denotes a battery voltage drop detection circuit for detecting a voltage drop of the battery E, and reference numeral 30 denotes a drive power supply control circuit which converts the voltage VC of the battery E into a voltage VD and supplies it to each unit. Reference numeral 31 denotes a clock IC for generating time information, reference numeral 32 denotes an 8-second interval generation circuit which wakes up and activates the CPU 28 which is normally in a sleep state every 8 seconds based on information from the clock IC 31, and reference numeral 33 denotes a reset of the CPU 28. This is a reset circuit. SW1 and SW2 are switches, RY is a relay for forming a loop of the line L and outputting a dial pulse signal, T1 and T2 are transformers, and AMP1 and AMP2 are amplifiers.

In the present apparatus, the power of the apparatus is supplied from a battery E, and the power consumption of the apparatus is reduced in order to avoid frequent replacement of the battery E and extend its life. Therefore, only the CPU 28, the clock IC 31, and the 8-second interval generation circuit 32 are directly connected to the battery voltage VC.
Are supplied, and the other parts are supplied with the voltage VD from the drive power supply control circuit 30 when the CPU 28 starts processing.
The CPU 28 always keeps the above-mentioned sleep state, which is the low power consumption mode, and outputs an output signal from the 8-second interval generation circuit 32 every eight seconds to the interrupt terminal INT.
When given to 1, it wakes up (wakes up) and starts processing.

In this case, the CPU 28 first controls the driving power supply control circuit 30 to supply the power from the battery E to each part of the apparatus as a voltage VD before starting the processing, and also, time information (time data) from the clock IC 31. Read.
If the time data coincides with the date data stored in the RAM 28B in advance, the electronic mail meter 7 and the electronic mail meter 7 are connected via the electronic mail meter connection interfaces 24 and 26, respectively.
Input the meter reading information such as gas and water from 8. Then, the relay RY is turned on to close the line loop, and the relay RY is turned on.
(Dial pulse) signal or PB based on the drive of
A PB signal based on the driving of the generator 17 is sent to the line L to call the center device. When detecting the response of the center device to this call, the CPU 28 drives the PB generator 17 and outputs the meter reading information to the line L as a PB signal. That is, the meter reading information is sent from the PB generator 17
Attenuator 18 → Amplifier AMP2 → Transformer T1 → Relay R
Y → switch SW1 → filter 12 → protection circuit 11 is output to line L and transmitted to the center device.

Further, when the CPU 28 wakes up, the outputs of the high voltage alarm 3, the low voltage alarm 4 and the external sensor 5 for detecting gas leakage and the like are output from the high voltage alarm monitor 21 and the low voltage alarm monitor, respectively. When the information is detected via the unit 22 and the external sensor monitoring unit 23, the information to that effect is transmitted to the center device as a PB signal via the line L via the same route.

The CPU 28 wakes up by off-hook of the telephone 2, and receives data from the center device. That is, when an incoming call arrives from the center device and the telephone 2 responds to the incoming call, the hook detection circuit 1
4 is supplied to a terminal INT2,
8 wakes up. In this case, the CPU 28 similarly controls the drive power supply circuit 30 to supply the power supply voltage VD to each unit, and responds to the incoming response of the line L by outputting an answer tone indicating download of data from the center device to the 1650 Hz detection circuit 16. Receive through. When the reception of the answer tone is completed, various system data such as a collection date of meter reading information transmitted from the center device is received and stored in the RAM 28B.

As described above, in this apparatus, in order to reduce the power consumption of the apparatus, the battery voltage VC is always supplied only to the CPU 28, the clock IC 31 and the 8-second interval generating circuit 32, and the CPU is always supplied to the CPU 28. It has a configuration to be in a sleep state in a low power consumption mode. Such a device is provided on the outer wall of each home, so that if there is a lightning strike or the like around the device, the noise may cause the clock IC 31 to lose its noise.
May become abnormal. In such a case, the CPU 28 started by the output signal of the 8-second interval generating circuit 32 reads out the data from the clock IC 31 and finds that the data is abnormal date data. And the meter reading information such as gas and water cannot be transmitted to the center device even when the designated date is reached.

Therefore, when the CPU 28 is activated by the output signal of the 8-second interval generation circuit 32, the clock I
The time data read from C31 and the previous time data stored in the RAM 28B are compared, and if there is an error of a predetermined period or more between them, a call is automatically made to the center device. When accurate time data is received from the center device in response to the call, the time data is transmitted to the clock I.
Set to C31.

FIG. 2 is a flow chart showing the operation of the above-described timepiece IC 31 when it is abnormal. The operation of the present apparatus will be described based on this flowchart. As mentioned above, 8
The output signal from the second interval generation circuit 32 is C every 8 seconds.
When given to the interrupt terminal INT1 of the PU 28, the CPU 28
Reference numeral 28 performs an intermittent operation every 8 seconds in synchronization with this output signal. If the output signal of the 8-second interval generation circuit 32 is given to the CPU 28 as an interrupt, the determination in step ST1 is "Y". In this case, the CPU 28 is activated and starts a time reading operation from the clock IC 31 in step ST2.

Then, the read time data is compared with the normal time data previously read from the clock IC 31 and stored in the RAM 28B, and it is determined in step ST3 whether there is a time difference of two days or more between the two. I do. In this case, if the time difference is within two days, the CPU 28 stores the read time data as normal data in the RAM 28B, proceeds to step ST7, and issues the above-mentioned regular notification of the gas meter reading information and the notification of the gas leak information. , An intermittent operation is started for 8 seconds. When the intermittent operation ends, the sleep state is set and the process returns to step ST1.

If there is a time difference of two days or more between the time data read from the clock IC 31 and the previous time data and the determination in step ST3 is "Y",
U28 determines that the clock data of the clock IC 31 has been destroyed by ambient noise or the like, and determines in step ST4 that the relay RY
, The line L is closed, and the telephone number of the center device is automatically dialed.
The clock abnormality information is reported by a signal. Then, the clock correction data returned from the center device in response to the notification of the clock abnormality information is downloaded in step ST5. That is,
The CPU 28 receives the clock correction data via the PB receiver 15 and stores it in the RAM 28B, and outputs the correction data to the clock IC 31 for time correction.
When the communication with the center device is completed in step ST6, the CPU 28 shifts to step ST7 and performs the above-described 8 seconds of the interruption operation.

In this embodiment, the criterion in units of two days is provided as a criterion for judging whether the time data read from the clock IC 31 is correct or not. This is because the surge voltage due to lightning strikes does not occur frequently, and if it does occur, the data of the clock IC 31 changes significantly. Have been. In this apparatus, both time data are compared every 8 seconds. Therefore, when the apparatus is installed in a bad environment with a lot of ambient noise, a judgment criterion may be provided so as to be about 8 seconds ± several%. good.

[0021]

As described above, according to the present invention, when a periodic notification of meter reading information such as gas is performed based on time data generated from a clock IC, the time data and the time previously stored in the storage means are used. Compare with the data, and if a predetermined error occurs in the comparison result, notify the center device,
The time data returned from the center device in response to this notification is stored in the storage means and set in the clock IC, so that accurate time data is secured even if the data in the clock IC becomes abnormal due to external noise. Therefore, there is an effect that the meter reading information can always be issued to the center device on the designated date.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a communication terminal device according to the present invention.

FIG. 2 is a flowchart showing the operation of the above device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Communication terminal device 13 Incoming call detection circuit 14 Hook detection circuit 15 PB receiver 16 1650Hz detection circuit 17 PB generator 20 Voltage alarm monitor 21 Non-voltage alarm monitor 22 External sensor monitor 24, 26 Telemeter meter connection interface 28 CPU 28B RAM 30 Drive power control circuit 31 Clock IC 32 8 second interval generation circuit E Battery

Continued on the front page (72) Inventor Yasuhide Tsuchida 3967-10, Wada, Matsumoto City, Nagano Prefecture, Toyo Keiki Co., Ltd. (72) Inventor Akira Koizumi 3967-10, Wada, Matsumoto City, Nagano Prefecture, Toyo Keiki Co., Ltd. (72 ) Inventor Yasutoshi Kurashina 3967-10, Wada, Matsumoto-shi, Nagano Toyo Keiki Co., Ltd. (56) References JP-A-63-80662 (JP, A) JP-A-5-130256 (JP, A) 4-165749 (JP, A) JP-A-4-283899 (JP, A) JP-A-62-109199 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) H04M 11/00 G08B 25/00 G08B 25/08 H04Q 9/00

Claims (1)

(57) [Claims] A clock IC for generating time data;
In a communication terminal device which issues a periodic notification to the center device based on the time data, a storage means for storing time data generated from the clock IC at a predetermined cycle, and a time data stored in the storage means. Comparing means for comparing the time data with the previously stored time data; and when a predetermined error occurs in the comparison result by the comparing means, a notification is sent to the center device, and the time returned from the center device in response to the notification. A communication terminal device comprising: a control unit that stores data in the storage unit and sets the data in the clock IC.