Track Geometry Car

Product

Track geometry car · Commons ↗ Report photo

A measurement-equipped railway vehicle carrying laser, camera and sensor systems to monitor track alignment, profile and ride quality.

Vehicle type	Self-powered measurement coach
Measurement frequency	25–100 kHz laser sampling rate
Data points per km	100,000–500,000 depending on speed
Laser wavelength	Typically 650–850 nm (visible/IR)
Lateral accuracy	±1–2 mm at gauge and alignment
Vertical accuracy	±2–3 mm for profile and twist
Operating speed	5–40 km/h measurement speed
Imaging resolution	Line-scan 2048–4096 pixels
Data storage	1–2 TB SSD per 1000 km recording
Power supply	Pantograph 750 V DC or onboard 24 V battery
Wheelset load	10–15 tonnes total coach mass
Standards	EN 13848 (track geometry), various national railway RFCs
Direct parts	7
Total parts	122
Class	Product

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Overview

A track geometry measurement car is a specialised railway vehicle carrying laser, optical and acceleration sensors to measure the precise shape and alignment of the track bed. Every railway must monitor its track geometry periodically, the rail alignment, gauge, profile, cant, twist, and ride quality. Worn or misaligned track causes accelerated damage and increases energy consumption.

How it works

The Coach Body houses the sensor stack and data processing electronics. The two measurement bogies carry wheels at precisely measured axle spacing with stiff springs and dampers.

The Laser Measurement Head is a non-contact laser head mounted below the car. It emits a laser beam at the rail top, and a photodiode receiver detects the reflection. The system builds a point cloud of the rail profile at speeds of 10–20 km/h.

The Imaging & Lighting System captures high-resolution line-scan images with high-brightness LED lighting. The Data Acquisition System system samples laser signals and acceleration data synchronously.

Track Geometry Car parts and their functions

7 top-level parts · 122 parts in total · full bill of materials below

Track Geometry Car parts diagram: 1 measurement bogie, 2 coach body, 3 laser measurement head, 4 imaging & lighting system, 5 data acquisition system, 6 power & distribution, 7 vibration isolation system. 122 parts in 7 top-level items. — Track Geometry Car parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.

#	Part	Qty	What it does
1	Measurement Bogie 5 parts	2×	Front and rear wheel bogies
2	Coach Body 5 parts	1×	Coach superstructure and cabin
3	Laser Measurement Head 4 parts	1×	Primary sensor and laser assembly
4	Imaging & Lighting System 4 parts	1×	Line-scan camera and lighting
5	Data Acquisition System 4 parts	1×	Recording and processing electronics
6	Power & Distribution 3 parts	1×	Electrical supply and distribution
7	Vibration Isolation System 2 parts	1×	Vibration isolation system

3D model

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Build & assembly graph

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Bill of materials for Track Geometry Car

7 top-level lines · 54 rows shown · 122 parts total · indented to 3 levels

#	Item / sub-assembly	Part no.	Qty/assy	Ext. qty	Parts	Type
1	Measurement Bogie 5 parts	track-geometry-car-bogie	2×	2	34	assembly
1.1	Wheel Assembly 5 parts	wheel-assembly	2×	4	9	assembly
1.1.1	Alloy Wheel	alloy-wheel	1×	4	·	part
1.1.2	Tire	tire	1×	4	·	part
1.1.3	TPMS Sensor	tpms-sensor	1×	4	·	part
1.1.4	Lug Nut	lug-nut	5×	20	·	part
1.1.5	Valve Stem	valve-stem	1×	4	·	part
1.2	Bogie Frame 3 parts	track-geometry-car-bogie-frame	1×	2	4	assembly
1.2.1	Bogie Sideframe	track-geometry-car-sideframe	2×	4	·	part
1.2.2	Transom Bar	track-geometry-car-transom-bar	1×	2	·	part
1.2.3	Fastener Set	fastener-set	1×	2	·	part
1.3	Coil Spring	coil-spring	4×	8	·	part
1.4	Damping Block 2 parts	track-geometry-car-damper-block	2×	4	2	assembly
1.4.1	Pressure Sensor	pressure-sensor	1×	4	·	part
1.4.2	Fastener Set	fastener-set	1×	4	·	part
1.5	Ball Bearing	ball-bearing	4×	8	·	part
2	Coach Body 5 parts	track-geometry-car-body	1×	1	9	assembly
2.1	Body Shell	track-geometry-car-body-shell	1×	1	·	part
2.2	Cabin Window	track-geometry-car-cabin-windows	4×	4	·	part
2.3	Cabin Door	track-geometry-car-cabin-door	1×	1	·	part
2.4	Sheet Metal Panel	sheet-panel	2×	2	·	part
2.5	Roof Assembly	track-geometry-car-roof-section	1×	1	·	part
3	Laser Measurement Head 4 parts	track-geometry-car-measurement-head	1×	1	4	assembly
3.1	Laser Module	track-geometry-car-laser-module	1×	1	·	part
3.2	Optics Assembly	track-geometry-car-optics-package	1×	1	·	part
3.3	Sensor Housing	track-geometry-car-sensor-housing	1×	1	·	part
3.4	Ball Bearing	ball-bearing	1×	1	·	part
4	Imaging & Lighting System 4 parts	track-geometry-car-imaging-system	1×	1	5	assembly
4.1	CMOS Image Sensor	image-sensor	1×	1	·	part
4.2	Lens Assembly	camera-lens	1×	1	·	part
4.3	LED Lighting Bar	track-geometry-car-led-light-array	2×	2	·	part
4.4	Imaging Enclosure	track-geometry-car-imaging-enclosure	1×	1	·	part
5	Data Acquisition System 4 parts	track-geometry-car-data-acquisition	1×	1	12	assembly
5.1	Data Logger Computer 4 parts	track-geometry-car-data-logger	1×	1	4	assembly
5.1.1	Compute SoC Module	soc-module	1×	1	·	part
5.1.2	Bare PCB	pcb-bare	1×	1	·	part
5.1.3	Microcontroller	mcu	1×	1	·	part
5.1.4	SMD Passive (R/C/L)	smd-passives	1×	1	·	part
5.2	ADC Board	track-geometry-car-adc-board	1×	1	·	part
5.3	Storage Module	track-geometry-car-storage-module	1×	1	·	part
5.4	Connector	connector	6×	6	·	part
6	Power & Distribution 3 parts	track-geometry-car-power-distribution	1×	1	19	assembly
6.1	Power Converter 2 parts	track-geometry-car-converter-module	1×	1	2	assembly
6.1.1	Power Supply	power-supply	1×	1	·	part
6.1.2	Fastener Set	fastener-set	1×	1	·	part
6.2	Distribution Panel 2 parts	track-geometry-car-distribution-panel	1×	1	12	assembly
6.2.1	Relay	relay	4×	4	·	part
6.2.2	Connector	connector	8×	8	·	part
6.3	Battery Backup UPS 2 parts	track-geometry-car-battery-backup	1×	1	5	assembly
6.3.1	LiPo Cell	lipo-cell	4×	4	·	part
6.3.2	BMS Board	bms-board	1×	1	·	part
7	Vibration Isolation System 2 parts	track-geometry-car-mechanical-damping	1×	1	5	assembly
7.1	Isolation Mount	track-geometry-car-isolation-mount	4×	4	·	part
7.2	Fastener Set	fastener-set	1×	1	·	part

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Sourcing: possible vendors

Browse the supplier directory → Prices, MOQ, and lead times are algorithmic estimates, not quotes, and not claims about these companies. Company mappings are curated by keyword; est. price band $500k–$60M. How estimates work

Vendor	HQ	Specialty	MOQ	Lead time
🇨🇳CRRC crrcgc.cc ↗	Beijing, CN	Rolling stock & rail systems	made to order	40–72 wks
🇫🇷Alstom alstom.com ↗	Saint-Ouen, FR	Rail rolling stock	made to order	40–72 wks
🇩🇪Siemens Mobility mobility.siemens.com ↗	Munich, DE	Rail systems	made to order	40–72 wks
🇨🇭Stadler Rail stadlerrail.com ↗	Bussnang, CH	Rail rolling stock	made to order	40–72 wks
🇺🇸Wabtec wabteccorp.com ↗	Pittsburgh, US	Rail equipment	made to order	40–72 wks

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