The invention provides a ring type pressure gauge, including inlet pipe and a scale dial, which comprises a Holzer element and a semicircular ring spring tube, light emitting diode, light emitting diode is arranged on the dial; and the corresponding scale value; a semicircular ring spring tube is arranged in a dial, end and inlet pipe connected, the other end is closed the edge is fixedly connected with the magnetic disk; Holzer element and inner wall is arranged on the output end of the dial, Holzer components by single chip drive light emitting diode. The Holzer component outputs a linear control signal at varying magnetic field strength. The Holzer component converts the pressure signal into an electrical signal to perform the piezoelectric detection conversion function. The meter gauge core adopts the non-contact structure, and has the advantages of simple structure, high sensitivity, good reliability, long service life, etc., and the annular luminous display is visual and beautiful.
【技术实现步骤摘要】
【技术保护点】
光环式压力表，包括进油管（６）和带有刻度值（３）的表盘（５），其特征在于还包括发光二极管（４）、霍尔元件（２）和半圆环弹簧管（９）；发光二极管（４）设于表盘（５）内并与刻度值（３）对应；半圆环弹簧管（９）设于表盘（５）内，其半径小于表盘（５）的内径，一端与进油管（６）连通，另一端封闭其外沿固定连接磁片（１）；磁片（１）与设于表盘（５）内侧壁的霍尔元件（２）相对，霍尔元件（２）的输出端通过单片机驱动发光二极管（４）。
【技术特征摘要】
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