dp transmitter for flow measurement

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1. "Traffic", the word for internet usage, how to say it in English

traffic [li ú li à ng] rate of flow; flow; runoff; discharge; throughput; (flow) rate; quantity (of flow); Flux phrase: flow meter module; flowmeter; consumption meter; Flow fluctuation; Flow measurement; discharge measurement; Flow measurement; Flow measuring probe; flow measuring unit; Flow sensor for measuring laughter volume; Flow transmitter; Flow unit {Tianwu} flux unit (FU); Example sentence: If cash flow is positive for all periods, then you are done with cash. If the cash flows for all accounting periods are positive, then there is no problem with cash. But thereremain concernsabout the increase in‘net’ flows, and whether adequate flows are being directed towards crucial regions, such as Africa. However, the increase in "net" traffic and whether there is sufficient funding flowing to key regions such as Africa remain concerns for the state. Combined with reduced blood flow, neuropathy in the foot increases the chance of foot ulcers and eventual limb elevation. The combination of foot neuropathy and reduced blood flow increases the risk of foot ulcers, ultimately leading to amputation.

2. Request an English document on the design of an ultrasonic rangefinder based on a microcontroller (with Chinese translation attached for better understanding)

This article described the three directions (before, left, right) ultrasonic ranging system is to understand the front of the robot, left and right environment to provide a movement away from the information. (Similar to GPS Positioning System) A principle of ultrasonic distance measurement 1, the principle of piezoelectric ultrasonic generator Piezoelectric ultrasonic

generator is the use of piezoelectric crystal resonators to work. Ultrasonic generator, the internal structure as shown in Figure 1, it has two piezoelectric chip and a resonance plate. When it "s two plus pulse signal, the frequency equal to the intrinsic piezoelectric oscillation frequency chip, the chip will happen piezoelectric resonance, and promote the development of plate vibration resonance, ultrasound is generated. Conversely, if the two are not inter-electrode voltage, when the board received ultrasonic resonance, it will be for vibration suppression of piezoelectric chip, the mechanical energy is converted to electrical signals, then it becomes the ultrasonic receiver. 2, the principle of ultrasonic distance measurement Ultrasonic transmitter in a direction to launch ultrasound, in the moment to launch the beginning of time at the same time, the spread of ultrasound in the air, obstacles on his way to return immediate ly, the ultrasonic reflected wave received by the receiver immediately stop the clock. Ultrasound in the air as the propagation velocity of 340m / s, according to the timer records the time t, we can calculate the distance between the launch distance barrier (s), that is: s = 340t / 2 Ultrasonic Ranging System for the Second Circuit Design System is characterized by single-chip microcomputer to control the use of ultrasonic transmitter and ultrasonic receiver since the launch from time to time, single-chip selection of 8751, economic-to-use, and the chip has 4K of ROM, to facilitate programming. Circuit schematic diagram shown in Figure 2. Draw only the front range of the circuit wiring diagram, left and right in front of Ranging Ranging circuits and the same circuit, it is omitted. 1,40 kHz u

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