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Flow collection system based on flow metering device

A technology of flow collection and flow measurement, which is applied in signal transmission system, electric signal transmission system, transmission of sensing components by electric/magnetic devices, etc., can solve problems such as poor anti-interference ability, and achieve strong anti-interference ability and stable signal Effect

Active Publication Date: 2014-10-01
CHENGDU QIANJIA TECH CO LTD
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Problems solved by technology

[0003] In order to solve the problem of poor anti-interference ability of the existing flow sensor signal processing circuit when the signal is amplified and shaped, the present invention provides a flow acquisition system based on a flow metering device

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  • Flow collection system based on flow metering device
  • Flow collection system based on flow metering device

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Embodiment Construction

[0020] The present invention will be further described in detail below in conjunction with test examples and specific embodiments. However, it should not be understood that the scope of the above subject matter of the present invention is limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0021] Such as figure 1 , figure 2 As shown, this embodiment provides a flow collection system based on a flow metering device.

[0022] It includes a flow acquisition module 1, a signal amplification module 2 and a filter shaping module 3. The signal collected by the flow acquisition module 1 is amplified by the signal amplification module 2 and then transmitted to the filter shaping module 3, and the output signal of the filter shaping module 3 is sent to the main flow metering device. control module.

[0023] Wherein, the filter shaping module 3 includes a first Schmitt trigge...

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Abstract

The invention provides a flow collection system based on a flow metering device. The flow collection system comprises a flow collection module, a signal amplification module and a filter shaping module, wherein signals collected by the flow collection module are transmitted to the filter shaping module after amplification of the signal amplification module, and output signals of the filter shaping module are transmitted to a master control module of the flow metering device; and the filter shaping module comprises a first Schmitt trigger, a second Schmitt trigger, a third Schmitt trigger as well as a half-wave shaping circuit for removing an alternating-current negative half-wave interference signal from signals. According to the flow collection system, the filter shaping module adopts the Schmitt triggers and the half-wave shaping circuit to perform filter shaping on signals collected by a Roots type flowmeter sensor, higher anti-interference capacity is provided, and more precise and stable signals are provided for the master control module of the flow metering device.

Description

technical field [0001] The invention relates to the technical field of flow measurement, in particular to a flow acquisition system based on a flow metering device. Background technique [0002] In the prior art, during the signal processing of the sensor, since the output signal of the sensor is very weak, only tens of millivolts, and some even only tens of microvolts, it is necessary to amplify and shape the signal, and the current flow metering device For signal shaping, single-limit comparators are mostly used. The anti-interference ability of this method is limited, resulting in poor ability to remove various interference signals, which cannot be removed, or useful signals are also removed, or useful signals are removed to retain interference signals. Contents of the invention [0003] In order to solve the problem of poor anti-interference ability of the existing flow sensor signal processing circuit during signal amplification and shaping, the invention provides a f...

Claims

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Application Information

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IPC IPC(8): G01D5/14G08C19/02
Inventor 刘勋
Owner CHENGDU QIANJIA TECH CO LTD
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