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Adaptive amplification system for echo signal of ultrasonic heat meter

A self-adaptive amplification and echo signal technology, applied in the direction of measuring heat, calorimeters, measuring devices, etc., can solve the problems of not being able to reflect the real echo energy and the error of amplifier magnification, and achieve strong adaptability and amplitude The effect of stabilizing the value and enhancing the adaptability

Inactive Publication Date: 2015-07-15
山东智信物联网技术有限公司
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Problems solved by technology

But when the echo signal of the heat meter is very weak, or even lost in the noise signal, the peak value used can no longer reflect the energy of the real echo, so setting the amplification factor of the amplifier will lead to a large error

Method used

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  • Adaptive amplification system for echo signal of ultrasonic heat meter
  • Adaptive amplification system for echo signal of ultrasonic heat meter
  • Adaptive amplification system for echo signal of ultrasonic heat meter

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Embodiment 1

[0047] according to figure 1 and figure 2 As shown: the A / D analog-to-digital conversion module in the figure adopts ADS822E analog-to-digital converter, which is a 10-bit 40MHz analog-to-digital conversion core produced by TI; the memory adopts IDT7205L15 digital memory chip; the programmable gain amplifier adopts OP37G high speed and extremely low noise The precise operational amplifier and AD623 integrated single-supply instrumentation amplifier, as the first stage of the system, block the noise signal that does not meet the echo frequency characteristics; the digital potentiometer adopts the X9241 digital potentiometer produced by Xicor Company, and the X9241 digital potentiometer is Integrate four non-volatile digital control potentiometers into a monolithic CMOS microcircuit. A single digital control potentiometer contains 63 resistance units, which can realize 64-level gain control, and four potentiometers in series can provide 256-level gain control. .

[0048...

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Abstract

The invention discloses an adaptive amplification system for an echo signal of an ultrasonic heat meter. The adaptive amplification system comprises an A / D (analog / digital) conversion module, a memory, a single-chip microcomputer, a digital potentiometer and a programmable gain amplifier which are connected in sequence; the adaptive amplification system is characterized in that the A / D conversion module is used for converting the acquired noise-containing ultrasonic echo signal and storing a converted signal in the memory; the memory is used for transmitting the converted signal into the single-chip microcomputer through a parallel interface; the single-chip microcomputer is used for calculating a result with a waveform digital operation extraction method and controlling the digital potentiometer to output a corresponding resistance value so as to adjust an amplification factor of the programmable gain amplifier and keep constant amplitude of the amplified echo signal.

Description

technical field [0001] The invention belongs to the technical field of heat metering equipment, and relates to an ultrasonic heat meter echo signal adaptive amplification system for adaptively adjusting the amplification factor according to the energy of the echo signal in the ultrasonic heat meter. Background technique [0002] As China's energy shortage and air pollution continue to intensify, in order to respond to the country's call for comprehensive, coordinated and sustainable development and the policy of energy conservation and emission reduction, it is necessary to carry out energy-saving transformation of my country's winter heating system, and use household-based metering instead of the original package fee system Metering and charging is imperative. As an important part of heat metering in energy-saving renovation, heat meter, its price and reliability will definitely affect the whole heating renovation. [0003] According to statistics, the current demand for re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K17/00
Inventor 高松良
Owner 山东智信物联网技术有限公司
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