Uniform velocity tube flowmeter and Anubis flowmeter

All bar-type flowmeters evolved (were improved) from average velocity tubes. It can only be said that the principle is the same and the basic structure is similar. But it can’t be equated yet.

It’s what was mentioned on the 2nd floor: the average velocity tube, also known as a flue tube, originated from a flow rate measurement device called a pitot tube； Since a pitot tube can only measure the flow velocity at one point and is thus unable to determine the average flow velocity within the pipe, an average velocity tube was developed; this device can measure the average velocity in the pipe and has therefore been widely used in pipe flow velocity measurements. Later on, the opening positions of the flow tube were optimized (Anubaa), and the cross-sectional shapes of the tubes were optimized (Delta, Veliba, Iteba, etc.) in order to reduce the influence of the measuring tube itself on the measurements. By the way, those “Ba” and “Ba” names were originally registered trademarks for uniform velocity tubes produced by different manufacturers. It’s just that Chinese people often use it to refer to structural differences.

In terms of principle, it is the Pitot tube used for measuring velocity that represents the actual principle. If a \"constant velocity\" is indeed required, then in principle it should be possible to install pressure sensors at multiple points along the radius or diameter of the pipe; this would require n sets of differential pressure gauges for measurement, followed by weighted calculation to determine the average flow velocity across the cross-section – which implies high measurement costs. So, with constant-pressure tubes and various other types of tubes, in order to simplify measurements using just one differential pressure gauge, people started looking for compromises in terms of pressure measurement methods, and began to create all sorts of complications. If we mess up the accounts, then there’s no need to give too many explanations or try to explain the principles behind it. As long as the measured values are more or less acceptable and can fool you into thinking they’re correct, that’s good enough. :lol

Actually produced! They are all based on the Bernoulli equation; a constant-speed pipe serves as a general term that includes Anubas flow meters. All types of barometers operate on the same principle; it’s just that the probe design and appearance vary. For example: Wiliba, Bituba, etc.

Got it. I am extremely grateful to everyone upstairs for their generous advice. I’ve benefited a lot! Thank you!

Brother Pig, let’s talk about the constant-flow tube flow meter again. Let’s first take a look at the flow velocity distribution diagram of the pipe cross-section posted by the expert on the third floor earlier. Look at the flow velocity distribution curve shown in the diagram; logically, there should be a point on this curve whose flow velocity corresponds to the average flow velocity within the pipe, right? Originally, based on the flow velocity distribution curve, the point representing the average flow velocity is identified; then a pitot tube is inserted at that point to take pressure readings, thereby allowing for an accurate measurement of the flow rate. But have the flow meter manufacturers told you that point? Have I told you what the optimal depth for inserting the pitot tube is? Why not tell you? Want to know why? :Lol, the reason is that I’ve already told you the calculation method and formula for determining the optimal value of the average flow rate, so they can’t keep exploiting you year after year to make money from you! Hehehe, that’s why flow meter manufacturers do all these tricks – they try various methods to suck in as much money as possible from you! And as for you, your bosses have plenty of money but also plenty of stupidity; they don’t realize how useful pitot tubes are, nor do they know how to make use of them properly. The pitot tube is a standard component in fighter jets, reconnaissance aircraft, and large planes, yet your leaders, those fools, have ignored and dismissed it...... Those cheap, ordinary flow meters have become the norm; I really don’t understand it. There was heavy bombing today. {:2_36:}

In reality, it’s the same; both the principle and the appearance are identical