Speed Wedge MKII Radar speed sensor
Product Overview
Speed measurement for in-door and off-highway vehicles, conveyor belts, material flow, open channel water surface flow ...

Speed Wedge MKII is a true-gound speed sensor and active motion detector for moving objects, based on Radar Doppler technology. Speed Wedge MKII deploys a Radar Frontend with planar antennas continously emitting electromagnetic waves at 24 GHz. Due to the movement of the sensor or the object the frequency of the back-scattered waves are doppler shifted. Doppler signal is deployed for speed measurement.
The forward speed of e.g. an indoor transportation vehicle, fork lift, conveyor belt, off-highway vehicle, UGVs unmanned ground vehicles and rail applications is measured contactless thus unsusceptible to wheel / traction slip and slide, effective tire / wheel circumference and sinking in of the tire. For demanding applications in harsh environments Speed Wedge MKII is sealed and potted in a rugged encasing.
Speed Wedge MKII is available in variants with pulse, serial RS232 and CAN-Bus output. High speed up to 200 km/h is available.
Speed Wedge MKII data sheet
Data sheet for MSO Speed Wedge MKII speed sensor here and further details on request.
Benefits/Use
Application Benefits
- Contactless untethered measurement of true-ground speed and distance travelled (odometry)
- regardless of wheel / traction slip and slide
- regardless of actual wheel / tire circumference affected by e.g. wear, varying tire inflation pressure, sticky material building up
- regardless of sinking in of tires / tracs on soft ground
- Commercial-off-the-shelf (COTS) solution
- One solution for all types of vehicles in diverse fleets
- Favorable total cost of ownership compared to case-by-case retrofit of diverse existing fleets speed measurement solution e.g. CAN OBD, RPM Sensors, Gearbox Sensors ....
- OEM-agnostic solution
- High dynamics and signal update rate
- True Speed over ground for traction, slip and breaking monitoring and control
- Easy installation in parallel or perpendicular to the object / surface being measured
- Unsusceptible against varying properties of the ground surface
- Pulse Output according to DIN 9684 / ISO 11786 and serial RS232
- Option: CAN-Bus interface
- Speed range from below 0.8 km/h up to high speed of 200 km/h
- Situational awareness : Detection of Stop and direction of movement (forward - backward)
- Basis for precise output application e.g. spraying, fertilizer application, seeding requiring forward speed & distance travelled
- applicable as a dead reckoning system component for inertial measurement units IMS in GPS/GNSS-denied / constricted environments e.g. in-doors, tunnels, (underground) mining .....
- assisting / augmenting GNSS with independent true-gound-speed
- sensor fusion with GNSS and IMS improving positioning accuracy, quality and reliability
- assistance / augmentation for in-door Real-Time Locating Systems (RTLS)
- improving safety, integrity and confidence in autonomous & safety solutions on and off the road, in buildings / warehouses, in underground mining ...
- independent true-ground-speed - backing for GNSS INS, positioning and navigation in mobile IoT
- Integration in INS for improved immunity against GNSS jamming and spoofing attacks
- tire / wheel slip & slide monitoring and closed loop control for vehicles
- tire / wheel wear monitoring comparing to wheel ticks e.g. for mining dump trucks / haulers, rail wagons / locomotives
Technical Data
Power supply | +9 VDC to +28 VDC |
Current consumption | < 200 mA |
Operating temperature | -40 °C to +70 °C |
Storage temperature | -40 °C to +85 °C |
Frequency and EIRP | 24.15 to 24.25 GHz at 12.7 dBm EIRP |
Output signal | 130 Pulses / m (36,1 Hz km-1 h-1) acc. DIN 9684 / ISO 11786 and serial RS232 or CAN-Bus |
Output signal update rate | 20 Hz |
Speed range | 0.8 km/h to 200 km/h |
Sensor Configuration | One Radar Frontend |
System Accuracy | 0.5 % F.R. |
Dimensions - less cable, with flaps | 55 mm wide, 110 mm long, 45 mm heigh |
Connector |
overmolded DIN M12 male plug, connector options t.b.d., e.g. Deutsch, Wheather Pack, AMP Superseal |
Vehicle Installation | base plate parallel to the object being measured, unobstructed view to the surface |
Certificates
Certificates
Electrical Safety |
EN 62368-1:2014 + A11:2017, IEC 62368-1: 2014 + A11:2017, EN 60950-22:2017
|
EMC | EN 301 489, EN 61326-1:2013 |
RF |
EN 62311 (MPE) |
RoHS |
Directive 2011/65/EU, EN 50581:2012 (EN IEC 63000:2018) |
RED | EN 300 440, SRD (1GHz to 40 GHz) - Category 1 |
FCC (U.S.A.) | FCC §15.249, Contains FCC ID: UXC-SMR-3X3, FCC ID: AXQCSWMKII-21, FCC 47 CFR Part 1 |
ISED (Canada) | ISED RSS-210 Annex B.10, Contains IC ID: 6902A-SMR3X3, RSS-GEN/ICES-003, Class B |
Environmental Protection |
ISO 20653 : IP6KX, IPX7, IPX9K |
ACMA (Australia) | Letter of authorisation for RCM compliance mark & Supplier´s declaration of conformity from RCM responsible supplier number E304, ACN/ARBN 84156023504 |
Dry heat test (CENELEC) | DIN EN 60068-2-2, DIN EN 50155 |
High temp. test (AREMA) | MIL-STD810G |
Low temp. test (CENELEC) | DIN EN 60068-2-1, DIN EN 50155 |
Low temp. test (AREMA) | MIL-STD810G |
High temp. storage (AREMA) | MIL-STD810G |
Low temp. storage (AREMA) | MIL-STD810G |
Low temp. storage (CENELEC) | DIN EN 60068-2-1, DIN EN 50155 |
Humidity / Damp heat (AREMA) | MIL-STD810G |
Humidity / Damp heat (CENELEC) | DIN EN 60068-2-30, DIN EN 50155 |
Random vibration | DIN EN 60068-2-64, DIN EN 61373 |
Mechanical shock | DIN EN 60068-2-27, DIN EN 61373 |
Sine vibration (AREMA) | MIL-STD810G |
Resonance search (AREMA) |
MIL-STD810G |
Mechanical shock (AREMA) |
MIL-STD810G |