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Telemetering apparatus

A technology of telemetry equipment and telemetry data, applied in monitoring/monitoring/test arrangement, telephone communication, signal transmission system, etc., which can solve the problems of reducing anti-noise characteristics, noise increasing voltage difference, incorrect operation, etc.

Inactive Publication Date: 2006-01-18
OKI ELECTRIC IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, depending on the high dV / dt as the correct value, the low dV / dt will not work properly, and considering the low dV / dt as the correct value will reduce the anti-noise characteristics
[0014] (3) Some noise superimposed on the communication lines L1 and L2 increases the voltage difference between the communication lines L1 and L2 during the waiting period, thereby generating a flow of trigger current as if a ringing signal is detected, and this current causes the hold Improper operation of circuits 16 and 17
Therefore, in order to avoid any incorrect operation, it is required to leave a large safety factor in these current quantities, which is an obstacle to realize low power consumption circuits
[0016] (5) The conventional polarity reversal detection circuit has two holding circuits which are composed of holding circuits 16 and 17 and work independently in turn. This way has the possibility of bringing some incorrect operations, such as simultaneous operation
[0017] (6) The conventional polarity reversal detection circuit has two independent holding circuits, requiring the corresponding optocoupler
[0021] (9) Because the pulse stream representing the correct ringing signal detection seems to be similar to the pulsating pulse stream, such a pulse stream is difficult to deal with in other circuits

Method used

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Examples

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Comparison scheme
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no. 1 example 〗

[0113] figure 1 is a schematic diagram showing a polarity inversion detection circuit according to a first embodiment of the present invention. The polarity inversion detection circuit is arranged in the telemetry device to detect a polarity inversion representing initiation or release of use of the communication line, which detection is performed by the exchange via the communication line.

[0114] The polarity reversal detection circuit has: a full-wave rectifier 20 connected between the communication lines L1 and L2, a first edge detection circuit 30A connected between the negative electrode terminal (-) of the full-wave rectifier 20 and the line L1, and the first edge detection circuit 30B connected between the negative electrode terminal (-) of the full-wave rectifier 20 and the line L2. The output sides of the edge detection circuits 30A and 30B are respectively connected to the input terminals of the OR circuit 40 . The OR circuit 40 is, for example, a wired-OR gate ...

no. 2 example 》

[0281] Figure 27 The configuration of a polarity inversion detection circuit according to a second embodiment of the present invention will be described. and figure 1 Elements shown that are the same have been given common reference numerals.

[0282] The polarity inversion detection circuit is used in a remote device to detect polarity inversion information as a start signal or a release signal from a pair of communication lines L1 and L2. The polarity inversion detection circuit has a full-wave rectifier 20 for full-wave rectifying the current flowing through the communication lines L1 and L2 to input a constant polarity voltage, detects the polarity inversion edge on the start signal or the release signal and outputs the first edge The first edge detection circuit 30A detects the trigger current Ita, and the second edge detection circuit 30B detects the polarity inversion edge on the start signal or the release signal and outputs the second edge detection trigger curren...

no. 3 example 》

[0348] Figure 33 The overall structure of a slow polarity inversion detection circuit according to a third embodiment of the present invention will be described.

[0349] Remote communication is available when the telephone line is not busy. The following differences exist between normal communication and remote communication:

[0350] Ordinary communication: ordinary polarity inversion (takes about 10ms) + ringing (ringing signal); and

[0351] Remote communication: slow polarity reversal (takes about 290ms) + no ringing.

[0352] The existing polarity inversion circuit and the polarity inversion detection circuits of the first and second embodiments can detect the above two kinds of polarity inversions, but cannot distinguish between slow polarity inversions and normal polarity inversions, in which slow A quick polarity reversal takes much longer than a normal polarity reversal. Therefore, the above two types of communication can only be distinguished by detecting wheth...

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Abstract

The object of the present invention is to provide the telemetering apparatus, which telemeters electric power, gas, and waterworks, for telemetering via a telephone network with an exchange, wherein the telemetering apparatus responds to the normal polarity inversion, the slow polarity inversion, and calling bell signal applied to the communication line therebetween upon starting or releasing of use of the communication line. To attain the above object, the telemetering appears according to the present invention comprises detection means for detecting a rising edge or falling edge of those polarity inversions and signal characterized thereby with reference to the respective predetermined voltage and the respective predetermined period, thus distinguishing one of these polarity inversions and signal from the others.

Description

[0001] This application is a divisional application of Chinese Patent Application No. 021440352 filed on September 30, 2002 by the applicant OKI Electric Industry Co., Ltd. with the title of invention "telemetry device". technical field [0002] The invention relates to a user terminal system comprising a telephone and a telemetry device. More specifically, it relates to telemetry equipment that detects signals sent from exchanges when communication lines between the exchange and users come into and out of use. Background technique [0003] Typically, in already used telephone networks, the switchboard provides power via the communication line to activate the telephones in the home. When an originating subscriber calls a destination subscriber, the exchange reverses the polarity of the voltage applied to the communication line between the exchange and the destination subscriber to notify the destination subscriber to start and stop using the communication line between them. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M11/00G08C17/02H03K3/0232H03K3/037H03K5/1534H04M19/04
CPCH04M11/002H04M3/22
Inventor 宫下时男小高利彦中村德雄上原启靖
Owner OKI ELECTRIC IND CO LTD