High-accuracy ultrasonic gas flow measuring circuit

A technology of gas flow and measurement circuit, which is applied in the direction of liquid/fluid solid measurement, flow measurement/mass flow measurement, measurement device, etc. It can solve the vibration of echo amplitude and phase, increase flow measurement error, and circuit failure Signal and other problems, to achieve the effect of reducing production cost, low production cost, enhancing echo signal and sensitivity

Inactive Publication Date: 2018-06-29
ZHEJIANG SAPPHIRE METER TECH
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the transducer will inevitably lose energy and generate noise when propagating in the air, which will cause the following problems, that is, the echo signal is weak, the circuit at the receiving end will not receive the signal, and the noise will make the amplitude of the echo and phase jitter, thereby increasing the error of flow measurement

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  • High-accuracy ultrasonic gas flow measuring circuit
  • High-accuracy ultrasonic gas flow measuring circuit
  • High-accuracy ultrasonic gas flow measuring circuit

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0018] Such as Figure 1 to Figure 3 As shown, a measurement circuit of high-precision ultrasonic gas flow includes a first transducer, a second transducer, an analog switch, a TDC chip, a charge amplification circuit and an MCU, and the analog switch is connected to the first transducer, The second transducer is electrically connected, the TDC chip is electrically connected to the analog switch, the charge amplification circuit, and the MCU, and the charge amplification circuit is electrically connected to the first transducer and the second transducer; the TDC The chip is connected to a high-speed clock calibration circuit. The high-speed clock calibration circuit includes a crystal oscillator, a first resistor, a second resistor, a first capacitor, and a second capacitor. One end of the crystal oscillator is connected to a certain pin of the...

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Abstract

The invention discloses a high-accuracy ultrasonic gas flow measuring circuit which comprises a first energy converter, a second energy converter, an analog switch, a TDC (time-to-digital converter) chip, a charge amplifier circuit and an MCU (micro-programmed control unit), the analog switch is electrically connected with the first energy converter and the second energy converter, the TDC chip iselectrically connected with the analog switch, the charge amplifier circuit and the MCU, the charge amplifier circuit is electrically connected with the first energy converter and the second energy converter, and the TDC chip is connected with a high-speed clock calibration circuit. The high-accuracy ultrasonic gas flow measuring circuit saves cost and is simple in structure and high in accuracy.

Description

technical field [0001] The invention relates to the field of measuring circuits for ultrasonic gas flow, more specifically, it relates to a measuring circuit for high-precision ultrasonic gas flow. Background technique [0002] In an ultrasonic gas meter, ideally the time difference between the sending and receiving of the ultrasonic transducer is a stable value. However, the transducer will inevitably lose energy and generate noise when propagating in the air, which will cause the following problems, that is, the echo signal is weak, the circuit at the receiving end will not receive the signal, and the noise will make the amplitude of the echo And phase jitter, which increases the error of flow measurement. Therefore, a cost-saving and high-precision measuring circuit is urgently needed. Contents of the invention [0003] The invention overcomes the disadvantages of the prior art, and provides a high-precision ultrasonic gas flow measurement circuit with low cost, simpl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F1/66
CPCG01F1/662
Inventor 叶善选金华园杨中翔赵捷丰郑培强
Owner ZHEJIANG SAPPHIRE METER TECH
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