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Electricity meter pulse modulation circuit and method

A technology of pulse modulation circuit and electric meter, which is applied in the direction of pulse frequency/rate modulation, measurement of electrical variables, measurement devices, etc., which can solve the problems of soft signal errors, inability to guarantee the continuity and integrity of signal transmission, etc.

Inactive Publication Date: 2013-12-04
WAHLAP TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Furthermore, the signal itself may generate soft errors, so that the continuity and integrity of signal transmission cannot be guaranteed

Method used

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  • Electricity meter pulse modulation circuit and method
  • Electricity meter pulse modulation circuit and method
  • Electricity meter pulse modulation circuit and method

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Embodiment Construction

[0019] refer to figure 1 , a preferred embodiment of an ammeter pulse modulation circuit, used for the pulse waveform output by MCU1, it is coupled to MCU1 and ammeter clock source 2 and receives MCU data signal DS and clock pulse signal CLK respectively, including: a pulse latch section 3, for generating the latch signal LS according to the MCU data signal DS1 and the clock pulse signal CLK1; cutting the pulse latch part 4, for generating the cutting latch signal DLS according to the MCU1 data signal DS2 and the clock pulse signal CLK2; and coupling The output unit 5 is connected to the pulse latch unit 3 and the reduced pulse latch unit 4 and outputs a pulse signal Q.

[0020] In one embodiment, the pulse latch unit 31 has a pulse input terminal DS and a clock input terminal CLK, similarly, the reduced pulse latch unit has a reduced pulse input terminal DS and a reduced clock input terminal CLK, wherein the The pulse input terminal and the cut pulse input terminal DS are co...

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PUM

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Abstract

The embodiment of the invention discloses an electricity meter pulse modulation circuit and method. The method comprises integrating the modulation circuit on the periphery of a single chip microcomputer and achieving pulse signal suppression and selection through a latch circuit principle, wherein the election is used for effectively eliminating the defects such as soft errors and analog quantity instability of digital signals.

Description

technical field [0001] The invention relates to the centralized reading technology of electric power grid, more specifically, the invention relates to a pulse modulation circuit of electric meter. Background technique [0002] PWM (Pulse Width Modulation) technology is used today in the fields of communication and signal acquisition. In the electrical measurement technology, the data processing single-chip microcomputer device embedded in the integrated circuit of the electrical measurement equipment (such as an electric meter) uses digital signals to modulate the level and on-off of the square wave or sawtooth wave signal carrying analog information to the communication part. Use this signal to control the data sending and receiving of the meter and similar actions. [0003] Of course, as far as the pulse signal itself is concerned, the control of the voltage level by the current PWM waveform is realized by means of frequency f modulation, so a clock source is required. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K7/06G01R11/02
Inventor 王永红陈丹蓉潘建成
Owner WAHLAP TECH CO LTD
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