Radar wave velocimeter for measuring the flow velocity of open channel water in rivers

NegotiableUpdate on 05/06

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

The radar radio wave velocimeter for measuring the flow velocity of open channels in rivers uses K-band radio waves for non-contact flow velocity measurement of rivers, sewage, mud, and oceans. The instrument is compact in size, handheld, powered by lithium-ion batteries, and easy to use. Not corroded by sewage or disturbed by sediment, the non-contact measurement ensures the safety of the measurer.

Product Details

Radar wave velocimeter for measuring the flow velocity of open channel water in rivers

The instrument includes a highly sensitive planar narrowband radar probe and an angle meter, and is operated handheld. The embedded operating software is menu based and easy to operate.

This manual provides a detailed introduction to the usage and maintenance of the electromagnetic current meter.

1.1 Instrument Features

At the bottomFor single use, weight700g, can be measured handheld or placed on a tripod (optional)；

At the bottomChinese interface, easy to operate；

At the bottomNon contact operation, not affected by sediment or water corrosion；

At the bottomAutomatic correction of horizontal and vertical angles;

At the bottomMultiple measurement modes, able to measure quickly or continuously；

At the bottomData can be wirelessly transmitted via BluetoothBluetooth is an optional accessory)；

At the bottomBuilt in large capacity lithium-ion battery, can be used continuously10More than hours；

At the bottomMultiple charging methods are available, including AC, in car, and portable power banks.

1.2 operating principle

Stalker II SVRIt can perform flow rate detection in three modes: single, continuous, and flow. This instrument is based on the principle of Doppler effect:

When the radar wave transmission source and the target are relatively stationary, the receiving frequency and transmission frequency are equal:

When the position of the transmitting wave source is fixed, the moving target moves at a speed relative to the transmitting wave sourceWhen moving in the direction of the wave source, the speed of the radar wave increases for moving targetsThe number of wavelengths of radar waves that reach a moving target per unit time, i.e. the receiving frequency, is:

Doppler frequency shift ；

Movement speed of moving target:

When the value is positive, it indicates that the velocity is in the same direction as the transmitted wave, while when the value is negative, it is in the opposite direction; The speed and frequency shift of moving targetsDirectly proportional, there are:

When measuring the speed of a flowing river surface, the radar emits microwaves towards the surface. When encountering waves, water bubbles, or floating objects (the measured moving target), the microwaves are absorbed and reflected. A part of the reflected wave is received by the probe and converted into an electrical signal, which is processed by the measurement circuit to measure the Doppler frequency shift. Based on the above principle, the flow velocity of the water body can be calculated. Due to the fact that the direction of radar wave emission and the direction of water flow usually have a certain angle, and the distance required for transmission and reception is round-trip, it is necessary to correct the above results. The actual water flow velocity after correction is: