A dual-channel self-correcting vortex effect flow sensor

Abstract

A two-way self-correcting vortex effect flow sensor, the sensor includes a housing, a vortex generator, a variable resistance tensioning device, a swing diaphragm, a light source transmitter, a light source receiver, wires and interface terminals; The vortex street generating body is provided with two parallel pillars, and a resistance variable tensioning device is installed between the two pillars. Terminal connection, the interface terminal is installed on the outer wall of the shell; the swing diaphragm is connected to the middle position of the variable resistance tensioner, and the surface of the swing diaphragm is provided with a light-transmitting hole, which is symmetrical on both sides of the light-transmitting hole of the swing diaphragm The light source transmitter and the light source receiver are installed, and the light source transmitter and the light source receiver are installed on the inner wall of the casing, and the light source transmitter and the light source receiver are respectively connected to the interface terminals through wires. The invention has the advantages of rapid response, strong anti-interference ability, mutual correction of two-way measurement and the like.

Description

technical field [0001] The invention relates to the field of sensors, in particular to a two-way self-correcting vortex street effect flow sensor. Background technique [0002] At present, most of the existing Karman vortex sensors for vehicles are photoelectric Karman vortex air flow sensors and ultrasonic Karman vortex air flow sensors. Their structures and manufacturing processes are complicated and expensive, so they are not suitable for popularization and use. However, most vortex sensors in industrial production use piezoelectric materials to collect pressure changes in the vortex. This method is susceptible to external interference, resulting in large measurement errors. Therefore, the above-mentioned vortex street sensors all have their own shortcomings and cannot meet the market demand. Contents of the invention [0003] The object of the present invention is to provide a dual-channel self-correcting vortex street effect flow sensor with simple structure, rapid r...

AI Technical Summary

Problems solved by technology

[0002] At present, most of the existing Karman vortex sensors for vehicles are photoelectric Karman vortex air flow sensors and ultrasonic Karman vortex air flow sensors. Their structures and manufacturing processes are complex and expensive, so they are not suitable for popularization and use.

However, the vortex street sensors in industrial production mostly use piezoelectric materials to collect the pressure changes of the vortex street. This method is susceptible to external interference, resulting in large measurement errors.

Therefore, the above-mentioned vortex street sensors all have their own shortcomings and cannot meet the market demand.

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