The encoder common terms

S output pulse number/roll

One revolution of the rotary encoder pulse output by the number of hair, for optical rotary encoder, often with the inside of the rotary encoder grating groove for the same (can also be used in the circuit output pulse number added to the slot number 2 times 4 times).

S resolution

Rotary encoder resolution said the spindle rotates, read the location data of maximum score, etc. Absolute value type is not in the form of a pulse output, and form the current code for the main shaft position (Angle). Unlike incremental type, is equal to the incremental type "output pulse/roll".

S grating

Optical rotary encoder, the grating has two kinds of metal and glass. Is made of metal, has light hole groove; Is made of glass, it is in the glass surface coated with a layer of shading film, in this there is no clear line (slot). Slot number less, can be used on the metal plate punching processing or grooving corrosion method. In impact resistance type using the metal grating encoder, it doesn't impact resistance compared with the metal grating, so on use, please note that don't impact directly on the encoder.

S maximum response frequency

In response to the maximum number of pulses within 1 second

(for example: maximum response frequency 2 KHZ, which is 1 seconds to 2000 pulse response)

Formula is as follows:

Maximum response speed (RPM)/x 60 Hz (pulse number/roll) = output frequency

S maximum response speed

Is the highest speed of response, happened under the speed pulse response formula is as follows:

Maximum response frequency (Hz)/(pulse number/roll) x 60 = shaft RPM speed

S output waveform

The output pulse waveform (signal).

S output signal phase difference

Two phase, the output of the two output pulse waveform of the relative lag.

S output voltage

Refers to the output pulse voltage. The output voltage will change because of the change of output current. Various series of output voltage, please refer to figure output current characteristics

S starting torque

Make dormant encoder shaft rotation necessary moment. Usually run in the moment than the starting torque is small.

S axis allows the load

Said additive on the axis of maximum load, which has two kinds of radial and axial load. Radial load for shaft is vertical, loading and eccentric Angle and so on; Axial load for shaft is horizontal, stress is associated with the force of push-pull shaft. The two forces affect the size of the shaft mechanical life

S axis of inertia torque

The value of moment of inertia of axis of rotation and the speed change resistance

S speed

Mechanical load limit of the speed instruction encoder. If you exceed this limit, will have a negative impact on the service life of the bearing, the other signals may interrupt.

S gray code

Gray code is advanced data, because is the unit of distance and cyclic code, so it is safe. Each step is only one change. The data processing, gray code must be converted to binary code.

S working current

Refers to the load current of channel allows.

S working temperature

Parameters mentioned in the table data and tolerance, in this temperature range is guaranteed. If a little higher or lower, the encoder will not damage. When to return to work temperature and can achieve technical specification

S working voltage

The power supply voltage of the encoder

application

This system USES the relative position measurement count way. Run programmatically before each signal, such as change speed point location, flat layer point location, such as parking brake point location of the pulse number, deposited in the corresponding memory cell, respectively, in the process of elevator running through the rotary encoder testing, software real-time computing the following signals: in the elevator floor location, change speed point location, flat layer point location, thus floor counting, the signal change speed peace layer signal.

The elevator in the operation of the displacement calculation is as follows: H = SI

Type in the S: pulse equivalent I: the cumulative number of pulse H: elevator displacement

S = PI lambda D/P.

D: tractive sheave diameter rho: PG card points frequency than lambda: gear reduction ratio

P: rotary encoder number of pulses per revolution

The lambda = 1/32 D = 580 mm in the system

Ned = 1450 r/min P = 1024 rho = 1/18

In S = PI lambda D/P rho = 1.00 mm/S pulse

Set a floor height is 4 m, the number of pulses each floor flat layer point is: the 1st floor of 0; The second floor is 4000; 3 floor of 8000; 4th floor for 12000.

Change speed before the floor is 1.6 meters, the floors in the number of pulses speed point is: rose: 1 to 2 floor, 2 to 3 floor for 2400 to 6400, 3 to 4 floor of 10400; Fallen: 4 to 3 floor, 3 to 2 floor for 9600 to 5600, 2 to 1 floor for 1600.