tachometer
A tachometer is one of the essential instruments in the mechanical industry, used to measure the speed, linear velocity, or frequency of a motor. Commonly used in manufacturing industries such as motors, electric fans, papermaking, plastics, synthetic fibers, washing machines, automobiles, airplanes, ships, etc. Most commonly used are handheld devicesCentrifugal tachometerSpeedometer measurement is essential in various fields of the national economy.
Concept of rotational speed
speedIt is a physical quantity that represents the ratio of the number of rotations of a rotating body to time. In engineering, it is usually expressed as rotational speed=number of rotations/time, and is an important parameter for describing the rotational motion of an object. Electricians often need to measure the speed of motors and their driving equipment, using portable tachometers. A tachometer is an instrument used to measure the speed and linear velocity of a motor. There are many types of tachometers, and portable ones generally include mechanical centrifugal tachometers and digital electronic tachometers.
working principle
The tachometer will receive the digitspulse signalAfter processing, it is directly read into the counting port of the CPU, and the software calculates the speed and the corresponding position of the pointer. Then, through the control port of the CPU, it amplifies and drives the stepper motor to rotate in the positive and negative directions, indicating the corresponding speed value (the pointer is directly installed on the rotating shaft of the stepper motor). The stepper motor only takes 1/3 degree per step.
Technical Specifications
Speed: 1 to 99999 revolutions per minute
Frequency: 0.0167-1666.6 Hz
Cycle: 0.6-6000ms
Count: 1 to 99999
Linear speed: 0.1 to 3000.0 meters per minute
Measurement accuracy of tachometer: ultra-high precision with a full range error of<0.02% (speed, frequency, cycle)
Measuring distance of tachometer: photoelectric type: 50-300 millimeters; Laser type: 50-3000 millimeters
Display: Dynamic LCD floating point display with five significant digits
Signal output: TTLlevelpulse output
Power supply: powered by two No. 7 batteries, can be used continuously for 24 hours
Job advantages
The static moment large pointer is not easy to shake and has strong anti vibration performance.
Adopting a single-chip microprocessor through software design, it has high accuracy and strong anti-interference ability.
The hour meter adopts LCD display without mechanical parts, making it more reliable and modern.
Due to its pointer indication conforming to traditional visual recognition habits and facilitating remote processing and networking requirements by computers, digital stepper motor instruments are the development trend of modern automotive and motorcycle instruments. Switec's stepper motors have been widely used in various automotive, motorcycle, and engineering machinery instruments both domestically and internationally. Automotive micro stepper motor is a specialized new type of automotive instrument accessory. The instrument designed using it not only conforms to traditional visual recognition habits but also meets digital processing requirements, making it an ideal accessory for modern instruments.
Classification of tachometers
Centrifugal rotational speed,Use the balance between centrifugal force and tensile force to indicate rotational speed. Centrifugal tachometer is a traditional tool for measuring rotational speed, which is a mechanical tachometer that utilizes the principle of centrifugal force; The measurement accuracy is generally between 1-2 levels, and it is usually installed on-site. An excellent centrifugal tachometer not only has the characteristics of accuracy and intuitiveness, but also has the advantages of reliability and durability. But the structure is quite complex.
Magnetic tachometerBy using a rotating magnetic field, a rotational force is generated on the metal cap, and the balance between the rotational force and the hairspring force is used to indicate the rotational speed. Magnetic tachometer is a model of successfully utilizing magnetic force and is a mechanical tachometer that utilizes the principle of magnetic force; Generally installed on-site, using a flexible shaft allows for short distance installation in different locations. Magnetic tachometer, due to its simple structure, is currently widely used in motorcycles, automobiles, and other mechanical equipment. The flexible shaft is prone to damage during remote installation.
Related models: SZMB-18-03 SZMB-18-04 SZMB-18-05 XJP-061E4 XJP-061E5
