JP2512472B2 - Remote monitoring system - Google Patents

Description

The present invention relates to a remote monitoring system in which monitoring information is transmitted to a center device side by voice synthesis sound.

[Conventional technology]

2. Description of the Related Art Conventionally, there is a remote monitoring system configured to monitor the state of a plant or a process by a terminal device and transmit the monitoring information to the center device side via a subscriber line by voice synthesis sound.

According to this system, for example, the monitoring information such as "water level abnormality" from the telemeter terminal is sounded by the center device side, so that necessary measures can be promptly performed on the monitoring information.

However, if the voice synthesizing function of the terminal device fails or becomes abnormal, no monitoring information is transmitted to the center device side, making it impossible to grasp the state of processes and the like.

Therefore, work has been conventionally performed to test the speech synthesis function of the terminal device periodically or at an appropriate cycle.

[Problems to be solved by the invention]

However, conventionally, the center device side calls each terminal device in order, and the test staff directly listens to the synthesized voice sent from the called terminal device, or it is recorded once and then reproduced. It has been determined by any one of the methods whether or not the voice synthesis function is normal. Therefore, there is a problem that it takes time and is troublesome. In this case, a configuration may be considered in which an automatic voice recognition device is added to the center device side, but there is a problem that the system becomes expensive.

An object of the present invention is to provide a remote monitoring system capable of quickly testing the voice synthesis function of a plurality of terminal devices with a simple configuration.

[Means for solving problems]

According to the present invention, a detection circuit for detecting a test signal transmitted from the center device side is provided in each terminal device, and a voice synthesis sound corresponding to a specific bit pattern is formed in the voice synthesis device when the test signal is detected. The center device demodulates the received voice-synthesized sound of the specific bit pattern signal received by the modem, and the demodulated bit pattern identifies whether the voice-synthesizing function of each terminal device is normal or not. It is configured in.

[Action]

When the center device calls the terminal device and transmits a test signal, the called terminal device returns a voice-synthesized voice corresponding to a specific bit pattern. On the side of the center device, after demodulating this voice-synthesized voice by the modem, the quality of the voice-synthesizing function is judged by the demodulated bit pattern.

〔Example〕

The first is a block diagram showing an embodiment of the present invention, which comprises a center device 1 and a plurality of terminal devices 2a to 2n. The center unit 1 is a central processing unit (CP) that outputs necessary control commands and the like according to the monitoring information from the terminal units 2a to 2n.
U) 10 and subscriber lines 3a to 3n connecting the terminal devices 2a to 2n
A network control unit (NCU) 11 that executes the connection sequence of
It is composed of a modem 12 and the like.

On the other hand, the terminal devices 2a to 2n include a network control unit (NCU) 21,
A detection circuit 22 for detecting a test signal related to the voice synthesizing function from the center device 1, a memory 23 in which a voice signal to be transmitted as monitoring information is stored as a PCM code, and a PCM code stored in this memory 23 is a time-series PCM. A parallel / serial converter (PSC) 24 for converting into a code, a demodulation circuit 25 for demodulating the converted PCM code into an audio signal, and a control device for controlling the entire terminal device such as reading the PCM code from the memory 23. It consists of 26 and.

Here, the NCU 11 of the sensor device 1 has an automatic dial transmission function for sequentially calling the terminal devices 2a to 2n. Similarly, the NCU 21 of the terminal devices 2a to 2n also has an automatic dialing function for calling the center device 1.

In the above configuration, when a test command of the voice synthesizing function is input to the CPU 10 of the sensor device 1 from the operation panel or the like, the CPU 10 controls the NCU 11 to sequentially call the terminal devices 2a to 2n. Therefore, for example, when the line connection with the called terminal device 2a is completed, a test signal of the voice synthesis function is transmitted to the terminal device 2a via the NCU 11 and the modem 12. This test signal is demodulated by the modem of the terminal device 2a and then input to the detection circuit 22 via the NCU 21.

When detecting that the test signal is input, the detection circuit 22 inputs the detection signal to the control device 26. Controller 26
In response to this, the PCM code of the voice-synthesized voice corresponding to the specific bit pattern stored in the memory 23 in advance is read and input to the parallel / serial converter 24. The converter 24 converts the input PCM code into a time series PCM code, and the demodulation circuit 25
, And synthesize it into a voice-synthesized voice corresponding to a specific bit pattern. This voice synthesized voice is transmitted to the center device 1 via the NCU 21 and the subscriber line 3a.

In the sensor device 1, the voice synthesis voice corresponding to the specific bit pattern input via the NCU 11 is demodulated by the modem 12 and then input to the CPU 10.

Here, in the voice synthesized voice input to the modem 12, for example, the portion corresponding to "1" is a tone signal of frequency f1,
The portion corresponding to "0" is the tone signal of frequency f2. Therefore, if the demodulation result matches the preset bit pattern, the CPU 10 determines that the voice synthesis function of the terminal device 2a is normal. The CPU 10 similarly performs the above-described operation for the remaining terminal devices 2b to 2n.

Therefore, according to the present invention, it is possible to automatically test the voice synthesizing function of all the terminal devices only by inputting the test command of the voice synthesizing function.

〔The invention's effect〕

As described above, according to the present invention, a test signal is transmitted from the center device side to the terminal device side, a voice synthesized voice corresponding to a specific bit pattern is returned in response to the test signal, and a demodulation result of the voice signal is sent. Since the quality of the voice synthesizing function is determined based on the bit pattern, the voice synthesizing function of a plurality of terminal devices can be quickly tested with a simple configuration without adding a voice recognition device.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention. 1 ... Sensor device, 2a-2n ... Terminal device, 3a-3n ... Subscriber line, 10 ... CPU, 11,21 ... NCU, 12,22 ... Detection circuit, 23 ... Memory, 25 ... … Demodulation circuit, 26… Control device.

Claims (1)

(57) [Claims] 1. A center device and a plurality of terminal devices connected to the center device via subscriber lines, each terminal device converting monitoring information into a voice synthesized voice by a voice synthesizer, and the center device. In a remote monitoring system configured to transmit to each terminal, each terminal device has a detection circuit that detects the test signal transmitted from the center device side, and a voice synthesis sound corresponding to a specific bit pattern when the test signal is detected. The voice synthesizer is provided with a control device for transmitting the voice synthesized voice to the center device. The center device demodulates the received voice synthesized voice by a modem and determines whether the voice synthesizing function of each terminal device is normal by the demodulated bit pattern. A remote monitoring system configured to determine.