摘要:
Systems, apparatus and methods are presented for sensing or estimating a tilt angle, in which a current flowing in an eccentric mass motor is sensed, and a detector circuit assesses the amplitude of a synchronous component of the motor current and provides an output signal or value indicating a tilt angle relative to a gravitational axis at least partially according to the amplitude of the synchronous component of the motor current.
摘要:
A liquid level detector for use in a pump control system comprises a chamber (20) for liquid, a liquid inlet (6) to the chamber (20), a liquid outlet (7) from the chamber and connectable to a pump, and a capacitive sensor comprising mutually spaced capacitive sensor elements (21, 22; 22, 23) forming a capacitance which is sensitive to permittivity within a region of the chamber proximate the capacitive sensor. The chamber is defined at least partially by a barrier member 25 and the capacitive sensor elements are provided on the barrier member outside the chamber.
摘要:
The invention relates to an apparatus and method for measuring the position of a gas bubble in a bubble level and a bubble level comprising the apparatus. The bubble level comprises a cylindrical sealed housing. The sealed housing is partially filled with liquid and contains the gas bubble. The apparatus comprises: at least two light-emitting devices, the light emitted from each light-emitting device illuminating the gas bubble and an inner bottom surface of the bubble level; and at least two receiving devices, each receiving device receiving the light that is reflected by the inner bottom surface of the bubble level and reflected and refracted by the gas bubble and converting it into electrical signals, the electrical signals being processed for calculating the position of the gas bubble, wherein each of the at least two light-emitting devices and each of the at least two receiving devices being alternatively disposed at the periphery of the cylindrical sealed housing.
摘要:
An optical sensor that a deterioration of detecting accuracy is suppressed is provided, and an optical sensor that an increase of the number of components and an increase of a physical constitution are suppressed is provided. The optical sensor has a light receiving element (120) having a light receiving surface (120a) to receives light, a detector (140) detecting an inclination of the light receiving surface in the vertical direction, and a correction portion (150a) correcting an output signal of the light receiving element (120) based on an output signal of the detector (140). Furthermore, the optical sensor includes a raindrop detector (210) detecting a raindrop, a light detector (230) detecting an incident light, and a storage part (250) storing these things. The raindrop detector (210) includes a light emitting element (211), a first light receiving element (212), and a first lens (213). The light detector (230) includes a second light receiving element (31) and a second lens (33).