Device for measuring air volume flow
A flow measurement device, gas volume technology, applied in the direction of measurement device, volume measurement instrument/method, liquid/fluid solid measurement, etc., can solve the problems of complex structure, high cost, narrow measurement range, etc., and achieve high sensitivity and flow measurement Wide range of effects for a wide range of applications
Active Publication Date: 2010-07-21
QINGDAO HAINA PHOTOELECTRICAL ENVIRONMENTAL PROTECTION
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Problems solved by technology
[0003] The object of the present invention is to provide a gas volume flow measuring device with simple structure, wide measuring range and high sensitivity, so as to solve the problem that existing measuring devices with simple structure have a narrow measuring range, while measuring devices with a wide measuring range have complex structures and high costs. high problem
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Embodiment 1
[0021] Embodiment one, see figure 1 As shown, in this embodiment, the gas volume flow measurement device specifically includes a water container 1, a reaction substance container 2, a first on-off valve 3, a second on-off valve 4, a third on-off valve 5, a pressure sensor 6, a micro Main components such as processor 7, syringe pump I and syringe pump II. Wherein, a first pipeline 8 is connected to the bottom of the water container 1, and the first pipeline 8 is connected to the second pipeline 9 through the first on-off valve 3, and then communicated with the reaction substance container 2 through the second pipeline 9. . At the same time, in order to facilitate gas exchange between the water container 1 and the reaction substance container 2, a third pipeline 10 is connected to the top of the water container 1 or the upper part of the side, and the reaction substance container 2 is connected through the third pipeline 10. Or connect the second pipeline 9 through the third p...
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The invention discloses a device for measuring volume flow rate of gas. The device comprises a pressure sensor, an injection pump and a micro processor, wherein the measuring gas passes through a gas pipeline, and acts on the pressure sensor on the one hand, and is connected with the injection pump; the pressure and the initial pressure of the measuring gas are compared by the pressure sensor so as to generate differential pressure signal, and the differential pressure signal is outputted to the micro processor; according to the differential pressure signal, the micro processor generates corresponding control signal to drive the injection pump to pump gas at a corresponding speed until the differential pressure is zero; in the process, the injection pump sends the displacement code signalgenerated during pumping to the micro processor, and the flow rate of the measuring gas is worked out by the micro processor according to the displacement code and the volume of an injector and the pumping time of the injection pump. The measuring device has the advantages of high sensitivity, wide flow rate measuring range and high reliability, and can particularly measure the volume flow rate of the gas with micro flow rate.
Description
technical field [0001] The invention belongs to the technical field of flow measurement, and in particular relates to a device for measuring gas volume flow. Background technique [0002] At present, the measurement objects of gas flow are complex and diverse, and there are many types of existing measurement methods and measurement devices. However, most products have a narrow flow measurement range, and their application will be limited for occasions with large flow fluctuations. In order to solve this problem, some gas flow measurement devices with a wide measurement range have appeared on the market at present, but their construction structure is relatively complicated, the cost is high, and the detection sensitivity of the gas with a small flow rate is very low. For the measurement of micro-flow gas, mass flowmeters are usually used for detection at present, and its working principle is to indirectly measure the gas flow through the detection of gas density. This detect...
Claims
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IPC IPC(8): G01F22/02
Inventor 何春雷陈光成谢传欣崔启利
Owner QINGDAO HAINA PHOTOELECTRICAL ENVIRONMENTAL PROTECTION