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DIESEL LOCO – Speedo Meter

January 5, 2021, 5:23 PM

It is also called as speed, time, and distance recorder. It is an important safety fitting. Its importance is as following –

1. Due to use of computer, authenticity of speed and distance graph is increased.

2. It can also sense accurate speed below 1 km/h.

3. The watch fitted in it, is battery operated and it can work up to 2 years without fail.

4. It is more reliable and requires less maintenance due to use of computer and stepper motor.

5. It gives audio – visual indication on over speeding.

6. Auto electronic speed signal generator (pulse generator) is provided to sense speed.

7. Its design is such as that it co-ordinate with wheel dia. In This System following equipments are fitted –

1. Speed Sensor- It is also called pulse generator. It consists of an optical beam and its moment is restricted by a disk having holes. The Generator gives pulse output on each obstruction. The light rays are obstructed by rotating shaft in speed sensor due to which input gets. For this two sensor outputs are there which are follows each other 90 degree apart. Speed and direction is obtained on normal logical power.

2. Power supply unit – This unit gets input from battery. It gives supply to computer and DC stepper motor.

3. Record unit- Two independent micro computers are provided in it to calculate speed, time and distance covered. DC stepper motor deviate the needle. The graph is prepared on paper of 120 mm width out of which 40 mm having indicator lines of 10 km/h interval and it records speed. Other lines on 20 mm indicate 1 minute interval and this part is called speed calculator, it has battery backup.

4. Speed Indicator – Its dial is of 270 degree and divided into 5.0 km/h intervals. Speed is analyzed by computer and controls steeper motor accordingly and the motor deviates needle on the dial. To indicate cumulative distance traveled is also indicated for this electrical auto meter is fitted which is controlled by computer.

5. To indicate over speeding audio visual indicator is provided it has LED which flickers and siren sound.

6. SP 90 S Speed Indicator – Speed per second is recorded by it. It has a key board like a computer which having various keys. With the help of keys following information is entered by crew –

a. I.D. no. of loco pilot –

i. Press driver ID button
ii. ID of previous driver will display.
iii. Enter new driver ID no. with the help of 0-9 number keys.
iv. Again press driver ID button due to which new number is saved.

b. Train number -While taking over charge of train it is to be entered

i. Press train number button.
ii. Previous train number will display.
iii. Enter new train no. with the help of 0 – 9 number keys.
iv. Again press train number button due to which new number is saved.

c. Time And Date –

i.Press set time button.
ii. Hours is indicated, adjust it. Save it by pressing EXEC button.
iii. Minute is indicated, adjust it. Save it by pressing EXEC button.
iv. Date/ month/ year is displayed, adjust it. Save it by pressing EXEC button.
v. To check date, press no. 1 key.
vi. To close display press 0 key and use any key to start it.

Note- while entering data it is to be ensured that loco is stand still other wise normal function of system is to be hampered. Conventional RT9 recorder has two keys. The right side key is for time setting and left side key is winding key. It is to be ensured that the key is winded while taking over charge. To wind it pull out and rotate anticlockwise and press there after. To adjust time pull out time setting key and rotate anticlockwise to set correct time then press it there after. While adjusting time note blue /white disk. White colour is displayed between 0-12 O’clock and blue colour between 12-0 o’ clock.

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