What Speedometer does? It is a safety device & fitted in Locomotive Cab/Cabs in front of Driver. Driver. It visualizes & records the speed & distance, travelled by the Locomotive at at any any instant as desired. Hence it avoids over speed & lower speed.
Over speed Over speed leads to an accident. Lower speed causes punctuality loss.
System of working of Speedometer The system system is designed to indicate the speed and time data of the the locomotive continuously and records the data on solid non volatile backup memory card.
The distance traveled (Odometer reading) can also be viewed in LCD display in loco standing condition. The system also displays the Date Time Driver’s No, Train No Loco No. The switch mode power supply (SMPS) makes the system free from interference due to OHE as well as Walkie-talkie Walkie-talkie used by Driver on locomotive. • • • • •
Power Supply Unit Consisting of DC-DC Converter with w ith electric isolation between input and outputs. The input power is taken from Locomotive battery The unit produces regulated outputs for all devices of speed controller and speed sensors.
Protection It has surge suppressor to prevent the devices from power line surge generated by Locomotive.
Interlocking It is designed to shut down outputs if input voltage exceeds the specified range. It automatically resumes normal output supply as soon as input is in specified range.
System Description The system consists of the following units:
Speed Sensor
Junction box
Recorder cum Indicator unit
Additional Speed Indicator
MOUNTING OF UNITS Units
Location
1. Speed Sensor
Axle Box Cover
2. Speed Indicator
Locomotive Cab
3. Recorder Cum Indicator 4. Junction Box
do
Locomotive Frame
Main Components Speed Sensor – Sensor – A square wave generator with number directly proportional to the distance covered and with the frequency proportional to the speed of the loco Nos of cycle = Distance, Nos of cycle per seconds = Speed
It has the fork to fit driving spindle, a round disc having cuts around circumference and a sensor unit. Sensor works on 6/9 Volt DC and supply received from RCI unit. It has optical detectors & it is so designed that when the working detector fails, automatically change over to the another. Unit is supposed to be maintenance free as no rubbing parts.
This sensor is an optical system that operates in infrared range. The continuous light beam of an emitter is interrupted by the rotating disc. The receiving transistor detects the pulsating light beam & generates frequency α speed. This frequency is transmitted via Amplifier Amplifier to SMD technology to the evaluation system for processing
S E N 1
--ve
--ve
+ve
+ve
O/P 1
O/P2
S E N 2
Cable SS to JB
PG
Junction box The junction box is used for interconnection of cables from Speed Sensor and Recorder cum Indicator unit. It is provided for easy disconnection of Speed Sensor in case of bogie body disconnection for maintenance
Recorder cum Indicator unit It is the main equipment connected with all the peripherals. This unit contains the following sub- assemblies: Microcontroller card Speed Indicator Card Serial Communication Card Memory Card Input Card Output Card Mother board for Recorder Alpha- Numeric Display Data Entry Keyboard
STDMC
(Speed, Time, Distance Memory Card)
It is the basic part that has: > A Micro-controller. > A Battery backed quartz crystal controller-timer. > Internal Data Memory
Micro-Controller
* Continuously measures the frequency of the pulses coming from speed sensor. * Continuously computes actual speed applying applying wheel diameter correction from configuration memory and drives stepper motor to move pointer on dial to indicate analog reading. * Continuously computes distance data from same signal and updates kilometer count (Odometer) with LCD display. * Continuously display the real time from timer with LCD display. * Speed, Time, Distance, Dynamic braking status and fault in system/equipments system/equipments data is recorded continuously in both Long & Short term Memory Card. * It drives an “ Over Speed Alarm”, when ever the configured speed limit exceeds. * It records & display latest error code in case of any fault occurs. Latest error code can be viewed in 16 character alphanumeric display.
Internal Data Memory This is subdivided into 04 parts as: * System Configuration Memory * Error Log * Short Term Data Memory * Long Term Data Memory The Configuration data consists consists of various various parameters: parameters: > Wheel diameter > Over speed limit > Mode of Recording > Sampling Rate.
Analog Speed Indicator * Consists of a graduated dial with w ith 270 degree scale spread over and 127 mm visible diameter. * It is driven by stepper motor & controller through microcontroller * It can indicate speed with a good stability down to a very low speed of 1 kmph
Recorder cum Indicator Unit The central control with --controllers and flash EEPROM (Electrical (Electri cal Erase Permanent Read Only Memory), Internal memory for calculating & recording the journey data, A portable flash memory card and power supply that receives 110/72Volts from the locomotive. It also provides analog indication of speed on dial . This unit has the following components: components: 1. Memor emory y 2. RS 232 Common Common Port Port 3. Param Paramete eterr Set Butt Button on 4. Memory Memory Free Freeze ze Butto Button n
A 16 digits two lines alphanumeric display which depicts the required parameters by pressing the display * Key board * Memory Memor y full function digit display * Audio visual over speed alarm with LED indication * Visual indication for Equipment/Recording fails.
RCI Unit also continuously records the following in the memory:
1.Speed in KMPH 2. Real time in Hrs, Minutes & Second 3.Dynamic brake status (ON/OFF) 4.Fault in system/Equipment
A SHORT TERM MEMORY – MEMORY – It stores the most recent data of at least 10 hours of travel in loop form in respect of parameters with resolution of one second
A LONG TERM MEMORY – MEMORY – It stores most recent recent 60 days data with a resolution of 20 second FAULT & CONFIGURATION CONFIGURATION MEMORIES – MEMORIES – It records records the status status of the equipment& equipment& internal internal faults and contains customer’s specific configuration parameters to process the store data.
Speed Indicator Unit – Unit – An independent microcomputer is used to indicate the actual speed on a dial on the front panel similar to an analog speedometer with pointer.The dial graduated in 5 KMPH intervals on 240 degree scale.
INTERNAL SETTING – SETTING – Provision has been made in both the RCI and Indicator units for manual input by the keyboard of: 1.The train number in 04 digit & Driver’s code/token No in 08 digit. Once data is stored store d by the locomotive Driver ,either in Indicator or in RCI the other unit will accept also. 2.Shed or Maintenance depot personnel •
Locomotive No
•
Wheel diameter
•
Permissible permitted speed
•
Date & Time
•
Driv Driver er& & Ass Asstt dri driver’ er’s Cod Code e
TYPES OF SPM Auto meters Medha
Facilities
MRT MRT MRT 912 912M 912 C
Graph roll Yes Yes availability
MRT MRT RT9 918VI 918VII
No
No
No
No 6 Hrs
60 Days
60 Days
90 Days
No
No
Yes
Yes
No
No
Yes
Digital speed No display
No
Yes
Memory capacity Memory freezer switch Driver/train ID entry Facility
Yes
SP 90S
No
Laxven
TELPRO LAXVEN 2000
No
No
No 30 Min.
60 Days
60 Days
Yes
No
Yes
Yes
Yes
Yes
Yes
No
No
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
SPEED TIME DISTANCE RECORDER CUM INDICATOR PARTS:
MRT – 918
1.MEMORY INDICATION
•
2.TOP COVER LOCK
•
3.FAULT INDICATION
•
4.SM POINTER
•
5.16CH ALFA NUMERIC DISPLAY
•
6.PS 232 SERIAL PORT
•
7SELECT PARAMETERS SWITCH
•
8.MEMORY FREEZE INDICATION
•
9.MEMORY CARD
•
10.MEMORY FREEZE SWITCH
•
11.KEY BOARD
•
12.MEM CARD BOARD
•
13.MEM CARD BOARD LOCK
•
Memory Freeze Indicator
0
1
5
6
LOAD
2
7
DISP
3
4
8
9
DRIV NO
TRAIN NO
C A N C E L
E N T E R
Memory Freeze Switch
M E M O R Y F R E E Z E
MEMORY FREEZE OPERATION * The Memory Freeze switch & the indication are provided inside a sealed glass cover on the Indicator Unit. * The glass has to be broken to operate the switch. * Once the switch is operated the LED will be “ON”. * There will be no more memory recorded in Short Term Memory as soon as switch is “ON”. There is no effect of Memory Freeze operation on the recording in Long Term Memory.
RECORDING MODES The data memory card is recorded both short & Long memory. Long memory is to be recorded with samples once in every 20 seconds. Short memory is to be recorded with w ith samples once in every 01 second. In this format the standard 2MB memory card can store --- more than 60 days (90 days) in Long memory --- more than 10 Hours in Short memory
The memory data is always duplicated in the Recorder cum Indicator Unit’s system memory, so that even if the memory card is not inserted also both the memories are maintained in the system memory to facilitate analysis after any unusual occurrences.
TIME BASED RECORDING
The data is recorded at pre determined interval of time. As per specification – specification – The Long Term Memory is to be recorded at 20 seconds interval.. interval The value can be selected between 1 – 1 – 120 120 seconds. Default value is 20 seconds
DISTANCE BASED RECORDING
The data is recorded at pre determined interval of time. The distance interval can be selected in the configuration. The value can be selected between 20 – 20 – 400 400 meters. Default value is 400 meters.
SPEED BASED RECORDING Data can be recorded whenever speed changes by a pre determined value (5 KMPH). The speed interval can be selected in the configuration. The value can be selected between 1-10 KMPH. The default value is 5 KMPH
EVENT DRIVEN RECORDING
This mode can be combined with any of the Time based, Distance based & Speed based modes. Any change in digital signal creates one extra record. It is to facilitates recording exact time of change of status of any digital signal.
INTELLIGENT MODE RECORDING One record is created whenever any of the following events occur: Ж for every change in speed by X KMPH (selected speed) Ж within this X KMPH interval also whenever w henever the speed is changed from acceleration to deceleration or vice versa ( Peak detection) Ж whenever distance travelled exceeds a specified distance (selected) Ж whenever the status of any digital input changes.
CHANGE OF MEMORY CARD * Locomotive
should be in standstill condition.
* Open the Memory card door by Key. * Press the release Lever back just below the Card. * Memory Card will come out. * Put the another Card inside the box & lock the door.
Opto - electronic pulse generator
Wax impregnated paper -- 102 mm width. On 40-mm width, lines are printed in 10 KMPH intervals Speed is recorded on this portion. On 20-mm width,10 lines (1mt) are printed on this portion. Recording STYLUS moves to and fro on these lines. Each transition of the STYLUS corresponds to 10mts of time elapsed
•
• • • • •
On the top of this line,hours are printed numerically. numerically. 24 hours format by an Hour Wheel and a Hammer(Controlled by µ-P) Speed of the CHART-- It moves by 05 mm/ hour of time elapsed(HALT) It moves 05mm/KM or 2.5 mm/KM (RUNNING) It saves paper when loco is stopped without losing time information.
• • • • •
Available in Standard Speed Scale ranges are
•
:0-75, 0-120, 0-150 and 0-180 Km/h. Conforming to RDSO Spec. No.: MP.0.3700-02 MP.0.3700-02 of Indian Railways
•
•
Power Supply --- 50V -- 90V ; Power Required ---15W(Recorder),05W(Indicator)Max ---15W(Recorder),05W(Indicator)Max Accuracy of Recording & Speed Indication -- ± 0.8% of full scale Range of Indication -- 240 degree full scale on 120 mm visible diameter Time display --- 06 digits, 24 hours format in hours,minutes and seconds. Odometer range -- 07 digit with 01 KM resolution % &Accuracy -- ±0.1%,0.1KM of the distance di stance traveled Wheel Dia. Adjustment Adjustment --- Possible to adjust Wheel dia in 01 mm steps. Dial Illumination
-- Through LEDs with adjustable illumination level ( 10 - 90%)
DISPLAY -- 16 character Alpha-numeric LCD display FOR S,T,D,Fault message & Diagnostic message. Memory--- 1> Long Term Memory. 2> Short Term Memory. 3> Configuration. 4> Error Log Memory Card -- 02 MB Capacity, Capacity, Water Water proof,Sealed and without backup Battery. Battery. Weight -- 4.5 Kg(Recorder),4.0Kg(Indicator), 3.0Kg(Speed Sensor T-813M).
TECHNICAL SPECIFICATIONS: SPECIFICATIONS: 1. Indications
• Speed in Kmph in Analog Form on 127mm Dia dial with accuracy of ±0.8% of Full Scale reading • Time in Hours, Minutes and Seconds in LCD Display with an accuracy of better than ±3 seconds per day. • Distance Traveled (Odometer) in a six digit format whenever desired in the LCD Display.
2. Odometer Accuracy
• 6 digit with 1 Km resolution • ±0.1% -1 km of the distance travelled
3. Recording (On Back up Memory)
• Speed in Kmph. • Date and Time • Distance Traveled in Metres
4. Working Voltage
• • • •
5. Memory Capacity
• 10 Hours of Run-time Run-time Minimum (Short Memory) • 60 Days of Run-time Run-time minimum (Long Memory)
6. Dial Illumination
•
12V, 30 mA - LED based, long life
7. Power Requirement
•
8 Watts Max.
Loco Battery Supply 14V-30V 14V-30V (Diesel Hydraulic Locos) 50V-90V 50V-90V (Diesel Electric Locos) 60V-140V 60V-140V (Electric Locos)
SALIENT FEATURES FEATURES • RELIABILTY -- It does not have carbon brushes and rubbing parts in speed sensor
• LESS MAINTENANCE-- It does not require any demagnetization, demagnetization, matching and cleaning of commutator commutator • LOW POWER CONSUMPTION-- It consumes only 15 Watt • HIGH ACCURACY ACCURACY -- Computers are used to compute the parameters hence accuracy obtained is much better • SAFE OPERATION OPERATION -- A preset audio-visual speed alar m with modulated tone is provided and the speed limit can be set with 01 KMPH resolution • EASE IN INSTALLATION -- Self contained unit with minimum wiring causes ease in installation • LOW MAINTENANCE COST-- Cost of maintenance is low as the system is basically electronic with simple mechanism mechanism • STABLE SYSTEM -- there is no need to switch off power when the locomotive is at rest.
FAILURE AILURE ANAL ANALYSIS YSIS SYMPTOM
PROBABLE DEFECTS
1.Total 1.Total System not Wkg Power Cable connection Fuse blown,PSM 2.No Speed Indication
Speed Sensor Cable
RECTIFICATION RECTIFICATION Check power cable & restore loco 72V DC power up to terminal BP & BN onPSM Check & restore cable connection from SS to Jn Box & Jn Box to Indicator.
Speed Sensor
Check it through Simulator
PSM
Check PSM
STDMC Computer Card
Replace STDMC Computer Card
3.Speed is more or less Wheel W heel diameter setting 4.Over speed alarm
Speed limit setting
Set it properly Adjust setting
sounding at wrong speed 5.No Time indication &
STDMC Card
Replace card
STDMC Card
Replace card
recording 6.LCD Display not showing parameter 7. LCD Display not
Door Sensor
Ensure Memory Door is closed properly showing Driver’s No & Train No
FAILURE AILURE ANAL ANALYSIS YSIS SYMPTOM
PROBABLE DEFECTS
8.Parameter value not changing INCREMENT S/W STDMC card
RECTIFICATION RECTIFICATION Check Switch function Replace STDMC card
9.Data not recorded in Mcard 15 pin D connector on Mcard Mcard Remove & check pin 15 pin D connector on
9. Data recorded but not retrieved on PC
Memory mechanism &
Check STDMC Card If
its wiring
wiring OK
Memory Card
Replace memory card
STDMC Card
Replace STDMC card
Data Retrieval Unit
Check & retrieve again
Software
Use proper software
Serial interface cable
Check cable & connect properly
NOTE – NOTE – IN case of any difficulty in Fault Rectification or Repetitive Failures in Service,Contact Factory for Assistance of a Service Engineer
ERROR CODE Sl.
Significance
Action to be taken
No
Error code
1
0000
No error
-----
2
0001
M-Detector feed back error at run
Check the alignment of Detector slot & set it
3
0002
M-Detector feed back error at zero speed
Check the alignment of Detector slot at 0 speed & set it properly pr operly..
4
0005
M-Detector /SM Motor faulty
Check function & connection, replace faulty parts
5
0006
G-Detector/ SM Motor faulty
Check function & connection, replace faulty parts
6
0007
LCD faulty
Check and replace if faulty
ERROR CODE Sl. Error Significance No code
Action to be taken
7
0008
RTC faulty
Replace SMTD card
8
0009
Initialization error in Memory Card
Replace Memory Card
9
0010
2 Selector faulty in
Replace Memory Card
Memory Card 10
0012
Detector M faulty
Check function & connection, replace faulty parts
11
0013
Detector G faulty
Check function & connection, replace faulty parts
12
0023
Odometer faulty at Reset
Check the system if necessary Replace SMTD Card
MODEL NUMBER The Model Number of Speed – Speed –TimeTime- Distance Recorder & Indicator depicts the Specification. The six digits suffix designates suffix designates the Model: MODEL No. XXXXXX 1st X -- Function 2nd X -- Scale Range 3rd X -- Locomotive type 4th X -- Operating Voltage 5th X -- Wheel Diameter Range 6th X -- Enclosure & Mounting
