Bidirectional Doppler velocimeter and bidirectional Doppler velocity measurement method

Abstract

The embodiment of the invention discloses a bidirectional Doppler velocimeter and a bidirectional Doppler velocity measurement method. The velocimeter comprises a control module, a clock module, two transmitting modules and two receiving modules, the transmitting modules, the receiving modules and the clock module are connected with the control module, and the transmitting modules and the receiving modules are connected with the clock module; the control module is used for controlling the clock module to provide a first electric signal for the transmitting module. The transmitting module transmits an acoustic signal according to the first electric signal; the receiving module is used for receiving a reflected wave signal generated after the sound wave signal is reflected, and generating a second electric signal according to the reflected wave signal; the clock module is used for providing a zero mixing signal for the receiving module; the receiving module is also used for processing the second electric signal according to the zero mixing signal; and the control module is further used for collecting the second electric signals processed by the two receiving modules and determining the water flow direction and the water flow velocity according to the second electric signals processed by the two receiving modules. According to the scheme, the accuracy of water flow velocity measurement can be improved.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of sensors, and in particular, to a bidirectional Doppler velocimeter and a method for bidirectional Doppler velocimetry. Background technique [0002] The prior art current meter with direction recognition function is designed with a high-frequency mixing point. If the frequency of the partial carrier wave collected by the current meter is greater than the frequency of the mixing point, it means that the direction of the water flow is positive; if the current meter collects If the frequency with part of the carrier is less than the frequency of the mixing point, it means that the direction of the water flow is negative, thus identifying the direction of the water flow. However, because the frequency of the mixing point of the current meter with high frequency mixing point is not at zero point, not only the starting point of the collected frequency with part of the carrier is high, ...

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Problems solved by technology

However, because the frequency of the mixing point of the current meter with high frequency mixing point is not at zero point, not only the starting point of the collected frequency with part of the carrier is high, but also the accuracy of the collected frequency with part of the carrier is low. The accuracy of the water flow rate thus measured is low

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