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MINE SPEED GAUGE SR

The speed gauge set includes an observer (indicating unit) and a transmitter  (sensor), with the observer mounted in the driver’s cabin, and sensor – in the cover of one of gear boxes.

Technical characteristics of the speed gauge

Speed measurement range, km/h 25
Limit absolute accuracy in the speed measurement range,% От 1 до 20
Supply voltage, V 24
Supply voltage limit values, V
-upper 30
-lower 16
Power consumption, Wt, maximum 2,5
Overall dimensions , mm
of the observer:
length 87
width 140
height 220
Of the transmitter:
length 200
width 120
height 140
Mass, kg
of indicating unit 7
of sensor 1
Version РV1V

 

The speed gauge SR is designed for operation in the following microclimatic conditions:

-environment — mine explosive atmosphere;

-environmental temperature —263 to 308 К (-10 to +35°С);

-upper value of relative humidity at the temperature of 308 К (+35°С) is equal to 98±2 % with moisture condensation;

-dust content — maximum 300 mg/m3;

-mechanical load exposure (sinusoidal vibration):

frequency band —0,5 to 100 Hz;

acceleration amplitude — to 10 m/s2;

-single action shocks:

shock acceleration peak value in horizontal direction — 30 m/s2; duration — 2 to 20 ms.

The speed gauge measures travelling speed of mine electric locomotive by indirect method consisting in direct measurement of rotation speed of one of railway motors and in conversion of rotation speed into travelling speed value in digital form. Measurement of speed does not depend on electric locomotive travelling direction.

The observer is a printed circuit board with inboard electroradioelements and digital displaying indicator. They are built in the metal case with inlet box for connector cable. The case is equipped with clamping devices for its installation in the driver’s cabin.

The magnetosensitive element is applied as a sensor. When gear tooth tip passes near the sensor face, there is a rectangular pulse generated therein equal to the sensor supply voltage (in the interval between teeth voltage is zero). The observer is made based upon processor enabling calculation of pulse quantity in unit time and transforms the red information into parameters of speed and trail displaying them at the LED, with the trail parameter stored in the nonvolatile memory.

Acceptance tests of the speed gauge SR carried out at the mine “Progress” SE “Torezantratsit” showed its high reliability and operating convenience. The speed gauge SR was launched into commercial production at PrJSC PCF “Amplituda”.