JPH0575743A - Automatic informing equipment - Google Patents

Abstract

PURPOSE:To surely execute the notice to the center even if an input miss at the time of initialization and a change of a circuit classification on the way occur by recognizing automatically the classification of the circuit to which the automatic informing equipment is connected and dialing, in the automatic informing equipment for detecting an abnormality signal from a sensor and informing its contents to the center equipment. CONSTITUTION:The automatic informing equipment is provided with a dial signal sending-out part 6v a PB signal sending-out part 8, a MODEM 9e a main control part 12, and a sensor interface 13. In this automatic informing equipment, the other party number is sent out by a dial by a circuit classification set and registered in advance, and a main control part 12 is allowed to have such an algorithm as the dial is sent out again by changing the circuit classification if there is no answer after waiting for a prescribed time. In such a way, automatic switching of DP/PB can be realized surely without providing a dial tone detecting part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic notification device which reads a meter reading value from a sensor of a gas meter or a water meter or an abnormal signal from the sensor and notifies the center device of the information by using a telephone line.

[0002]

2. Description of the Related Art FIG. 3 is a block diagram showing the configuration of a conventional automatic notification device. In FIG. 3, the automatic notification device is connected to a central office exchange through a telephone line 5 at a telephone line connection terminal 4. The telephone line connection terminal 4 is a DP (Dial Pulse).
e) PB (P
Connect to the push button) signal sending unit 8 and the modem 9. The telephone 11 and the dial tone detector 16 are connected to the telephone connection terminal 10. The DP signal transmitter 6, the PB signal transmitter 8, the modem 9, and the dial tone detector 16 are connected to the main controller 12 '. Sensor interface 13
Is also connected to the main controller 12 'and the sensor connection terminal 1
4 to the sensor 15.

The operation of the automatic notification device configured as described above will be described below. It is assumed that DP is registered as a line type in the main control unit 12 'in advance. After the telephone line 5 is captured through the telephone line connection terminal 4, the DP signal transmission unit 6 transmits the DP signal of the first digit in response to a command from the main control unit 12 '. If the line type matches, the dial tone of the telephone line 5 disappears, and if they do not match, the dial tone does not disappear. The line type can be determined by detecting the dial tone with the dial tone detecting unit 16. Therefore, if the dial tone has disappeared, the DP signal in the second and subsequent digits is continuously transmitted, and if it has not disappeared, the telephone line is temporarily released, and the PB signal transmitter 8 again transmits the PB signal from the first digit. 1 as above
The DP / PB automatic switching is realized by detecting the dial tone of the telephone line after transmitting the digit.

[0004]

However, in the above-described conventional automatic notification device, since the dial tone of the telephone line after transmitting the dial signal of the first digit is detected, some trouble is caused in the dial tone detecting section 16. If the dial tone cannot be detected after that, DP / PB
If you can not switch automatically, and if the line type is changed at that time, you will not be able to call again. Further, when a battery or the like is used as a power source of the automatic notification device, the repeated notification is repeated, which causes a problem that the life of the automatic notification device itself is shortened.

The present invention solves the above-mentioned conventional problems, and an object thereof is to provide an automatic notification device which is excellent in reliability and inexpensive.

[0006]

In order to achieve the above object, the present invention eliminates the dial tone detection section and adds the following algorithm to the main control section. Assuming that DP is registered as a line type in the main control unit in advance, the above-mentioned algorithm means that the DP signal transmission unit transmits the DP signal of the center number by the signal from the main control unit. If the later center does not respond, the main control unit determines that the line type is different, switches the line type, and immediately sends the PB signal by the PB signal sending unit. If the above-mentioned center does not answer, it means that the center device did not automatically receive the call, and if it answers the above, it means that the notification ended normally, or if the notification ended abnormally on the way. It is.

[0007]

By adding the above algorithm, the dial tone detecting section can be deleted without being necessary. If the conventional dial tone detecting section fails to detect the dial tone, Of D
The P / PB automatic switching cannot be performed, and if the line type is changed at that time, it is possible to eliminate the trouble that the user cannot be notified again, and the switching can be reliably performed at any time. Furthermore, if a battery or the like is used as the power source of the automatic notification device, communication with the center cannot be performed normally due to different line types, and the life of the automatic notification device itself for repeated repeat notifications will be shortened. Can also be avoided.

[0008]

EXAMPLE An example of the present invention will be described below.

FIG. 1 is a block diagram showing the configuration of an embodiment of the automatic notification apparatus of the present invention, and FIG. 2 is a DP / P of the main control section.
It is a flowchart shown in the algorithm regarding B switching.

Next, an embodiment will be described together with its operation. Figure 1
In, the center is constituted by the center device 1 and the center modem 2 which process data. The center modem 2 is connected to the central office switch 3. The automatic notification device, which is a terminal, is connected to the central office exchange 3 via a telephone line 5 at a telephone line connection terminal 4. The telephone line connection terminal 4 is connected to the PB signal transmission unit 8 and the modem 9 via the DP signal transmission unit 6 and the communication transformer 7. A telephone 11 is connected to the telephone connection terminal 10. The DP signal transmitter 6, the PB signal transmitter 8, and the modem 9 are connected to the main controller 12. Sensor interface 13
Is also connected to the main control unit 12 and the sensor connection terminal 14
To the sensor 15 via. Although DP or PB is registered in the main control unit 12 as the line type in advance, it is assumed that DP is registered. In response to a command from the main control unit 12, the DP signal sending unit 6 sends the DP signal of the center number to the central office switch 3. If the line type does not match, the center side does not receive the call and communication is not possible. If there is no response after a fixed time, the main control unit 12 switches the line type to PB, and immediately this time the PB signal transmission unit 8
To send a PB signal. On the other hand, if there is a response, it means that the line type matches, so the line type is not changed. The above-mentioned function is included in the main control unit 12 as an algorithm (FIG. 2). As described above, according to the present embodiment, the dial tone detecting unit in the conventional embodiment is not necessary and can be deleted. Therefore, it is possible to avoid not being in a report-disabled state due to a malfunction of the dial tone detecting unit, and not only DP / PB switching can be realized at low cost.

[0011]

As described above, according to the present invention, means for notifying the center device by using the telephone line and the line type of the telephone line connected at the time of the above notification are automatically detected by the presence or absence of the response signal. By providing the DP / PB automatic switching means, the means for detecting the presence of the dial tone can be eliminated, and an excellent automatic notification device that is inexpensive and highly reliable can be realized.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration in an embodiment of an automatic notification device of the present invention.

FIG. 2 is a flowchart showing an algorithm for DP / PB switching of the main control unit in the embodiment.

FIG. 3 is a block diagram of a conventional automatic notification device.

[Explanation of symbols]

 1 center device 5 telephone line 6 DP signal transmission unit 8 PB signal transmission unit 9 modem 12 main control unit 13 sensor interface 15 sensor

Claims (1)

[Claims] 1. A sensor interface and a main control unit for detecting a meter reading value or an abnormal signal from the sensor, and a D for notifying the center device of the detected contents by using a telephone line.
A P signal transmission unit, a PB signal transmission unit and a modem,
An automatic notification device, characterized in that the main control section is provided with an algorithm for automatic DP / PB switching for automatically detecting the line type of a telephone line connected at the time of the above notification based on the presence or absence of a response signal.