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.
【技術實現步驟摘要】
【技術保護點】
光環式壓力表,包括進油管(6)和帶有刻度值(3)的表盤(5),其特征在于還包括發光二極管(4)、霍爾元件(2)和半圓環彈簧管(9);發光二極管(4)設于表盤(5)內并與刻度值(3)對應;半圓環彈簧管(9)設于表盤(5)內,其半徑小于表盤(5)的內徑,一端與進油管(6)連通,另一端封閉其外沿固定連接磁片(1);磁片(1)與設于表盤(5)內側壁的霍爾元件(2)相對,霍爾元件(2)的輸出端通過單片機驅動發光二極管(4)。
【技術特征摘要】
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