63results about How to "The principle is intuitive" patented technology

The invention relates to the technical field of monitoring equipment, and discloses a tilt monitor which comprises a base. The base is a disc-shaped block; vertical instrument is fixedly mounted on the upper wall surface of the base; the vertical instrument is of an existing structure and repeated description is not made; a circular cylinder is fixedly mounted on the upper wall surface of the base; the interior of the circular cylinder is of a hollow structure. The hollow part in the circular cylinder penetrates through the upper wall surface of the circular cylinder. The tilt monitor adopts the most original physical principle and works by virtue of earth gravity and can eliminate any external interference and is simple in working principle without complex circuits and electronic elementsand is not liable to make mistakes and is intuitive in principle and easy to install and can be easily installed by a common worker.

The invention discloses a two-level dual-mode space vector over-modulation method and a two-level dual-mode space vector over-modulation system. The over-modulation method comprises the following steps of: calculating a modulation ratio of a reference vector and an acting time of a basic vector according to a method of a linear modulation zone; determining an over-modulation zone in which the reference vector stays according to the modulation ratio to select different over-modulation modes; calculating a compensation coefficient of an over-modulation mode A if the reference vector stays at the over-modulation mode A, and correcting the acting time of the basic vector according to the acting time and the compensation coefficient of a zero vector; and calculating a compensation coefficient of an over-modulation mode B if the reference vector stays at the over-modulation mode B, and correcting an acting time of the basic vector according to the acting time and the compensation coefficient of two valid vectors. Due to the adoption of the over-modulation method and the over-modulation system, technical problems that the existing over-modulation method and over-modulation system are complicated, and difference between the output voltage and the reference voltage is large can be solved, the method and the system are simple in principle and simple to realize, and the heights of the output voltage and the reference voltage are maintained to be consistent.

The invention relates to an isolation amplifier, its proportion controlled source, its integral controlled source and a mutual coupler, belonging to a circuit, an electronic circuit and an analog signal processing device. The isolation amplifier is composed of two diode or triode receiving photocouplers with the same parameters. It adopts a complementary symmetrical structure and has excellent characteristics of amplifying DC signals, high isolation performance, positive and negative symmetry of AC signals, and fast response; proportional controlled source and integral The controlled source is composed of an isolation amplifier and an operational amplifier, and the central core circuit is mirror-symmetrical, and has high isolation performance, high linearity and high operational precision, and the input and output characteristics of an ideal controlled source; the mutual coupler is composed of a controlled source, Due to the complementary symmetrical structure of the isolation amplifier and the mirror symmetrical structure of the controlled source, the mutual coupler has excellent performance and can realize various transformation functions. Proportional controlled sources, integral controlled sources and mutual couplers are used in single-phase, two-phase and three-phase circuits to achieve rich isolation, control, calculation and conversion functions.

The invention discloses a camera model standardization method and a standardization device. The camera model standardization method and the standardization device are achieved by virtue of a program control multi-tooth circular dividing table, a six-dimension rotary table and an one-dimension target. Direct mapping of space standard angle-image surface curve data is directly set up when the camera is calibrated. A two-dimension angle coordinate of a space standard straight line on the camera image surface is recorded, thus the camera standardization is completed. The purpose of measuring the single camera angle is achieved according to the calibrated straight line two-dimension coordinate on the random position of the standard data interpolation calculating image surface when the camera model is measured. According to the camera model standardization method and the standardization device, a traditional model that a parameter analysis imaging model is set up of the existing camera standardization method is surpassed. A non-parametric model composed by a large number of angle-curve data is set up. The camera model standardization method and the standardization device are visual in principle, convenient to achieve, good in feasibility, controllable in precision, low in cost and capable of effectively improving the current situation of difficult standardization of a large visual field camera. Complexity and cost investment of large-size target manufacturing are reduced. The camera model standardization method and the standardization device play an important role in the development of vision measurement of a large-scale workpiece.