What are the types of engineering measuring instruments?
Measuring instrumentIn photogrammetry, an instrument for measuring the stereo image, the plane of the same name, the plane, the Cartesian coordinates, and the coordinate difference (parallax). By the observation system, guide system, like disc, measuring system and lighting equipment etc..Some instruments have an automatic coordinate recording device, and a computer can use them directly to obtain punched tape or a device for automatically measuring image points.It is mainly used for analyzing aerial triangulation and ground stereo photogrammetry to encrypt image control points.
TheodoliteAn instrument for measuring horizontal angles and vertical angles. It consists of a telescope, a horizontal dial, a vertical plate and a base. The reading device is divided into vernier theodolite, optical theodolite and electronic (automatic display) theodolite. Theodolite is widely used in control, topography and construction lofting, and other measurements.
Range finderAn instrument for measuring the distance between two points by means of electromagnetic wave carrying distance signals. A measuring range of 5~20 kilometers is called a range finder, and a geodesic range measuring instrument is within 5 kilometers. Accuracy is generally 5mm+5ppm, with small, portable, high precision characteristics.Since 60s, rangefinder has developed rapidly. Production of two-color precision photoelectric range finder, accuracy has reached 0.1mm+0.1ppm. Electromagnetic range finder has been widely used in the measurement of control, topography and construction lofting, and has improved the efficiency and distance accuracy of the industry.
