PreView Sentry® ST97 Series Sensor Operating Manual www.preco.
FCC STATEMENT This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Warning: Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.
Contents Product Description ....................................................................... 1 Sensor Description .................................................................... 1 Other Sensor Features .............................................................. 3 Sensor Interfaces and Configuration ....................................... 4 Object Detection Capability ........................................................... 5 Sensor Installation ............................................
Product Description The PreView Sentry® is a Frequency Modulated Continuous Waveform radar object detection system designed to alert equipment (vehicle, truck, machine) operators to the presence of obstacles. The sensor detects both moving and stationary objects in a pre-defined coverage area and can report the distance of the closest object via visual range indicators (display) and an audible signal (display or buzzer) to the equipment operator. Figure 1.
Using a FMCW, the Sentry® measures radial range, speed and angle, reflectivity, and other parameters of multiple stationary and moving targets simultaneously. This radar sensor has a wide horizontal field of view up to +/75° (150°), providing coverage flexibility to be a solution for virtually any application. Figure 2 illustrates an example of the Sentry® sensor’s adjustable detection zone. Figure 2.
Figure 3 illustrates a truck backing application with the radar detection zone set to a range of 6 m (20’) and a width of 3 m (10’). Figure 3. Detection Zone 6 m Figure 4 illustrates a mining haul truck backing application with the radar detection zone set to a range of 30 m (98’) and a width of 10 m (32’). Figure 4. Detection Zone 30 m The sensor is active and starts reporting detections within 240 ms after power up.
Sensor Interfaces and Configuration Communication The Sentry® communicates with the in-cab display using a CAN interface as specified in ISO 11898-2. The CAN bus operates at 250 KBits/second and is not terminated in the sensor. Since CAN is a standard communication interface, the sensor can be connected to other CAN controllers, telematics interfaces, displays, etc. Contact PRECO Electronics® for further details.
Object Detection Capability PreView® systems are blind spot collision warning systems designed to supplement other safety practices and/or devices. The equipment operator is always the first line of defense when safely operating equipment. PreView® radar sensor can detect most objects within the detection zone. However, there are some instances where objects can go undetected. Obstacle size, shape, relative location, and composition are all factors determining if, when, and where an object is detected.
Figure 5. Object Reflection +1.866.977.7326 www.preco.
Sensor Installation Before you Start Prior to installing the PreView® Object Detection System take time to familiarize yourself with all of the all documentation, theory of operation, and system components. Sensor Location The PreView® sensor mounting location is integral to proper system operation. The sensor’s detection zone must cover the blind spot you wish to monitor and the sensor must be mounted at the appropriate height.
Mounting Tolerances Mounting height tolerance at 36” (1 m) is +/- 12” (0.3 m). For optimal performance at 36” (1 m), the vertical angle (Up/Down) tolerances are +5° (up) and -2° (down), and the horizontal angle tolerance is +/- 5°. Orientation: THIS SIDE UP Figure 6. Vertical and Horizontal Angle Mounting Tolerances Exceptions: if mounting higher than 4 feet (1.3 m), the sensor can be angled down a few degrees as necessary (less than 5° in most applications).
Keep Out/Interference Zones For optimal performance, the sensor should protrude beyond any other portion of the vehicle. If this is not possible, it is important to understand how surrounding objects can impact the sensor’s performance. The sensor’s horizontal field of view is +/- 75° (150°) and the vertical field of view is +/10° (20°); however, metallic and other strong radar reflecting objects outside but near this field of view can cause interference.
PreView® Daily Maintenance Safety Message to Equipment Operators with PreView® Systems 1. Failure to follow all safety precautions and instructions may result in property damage, serious injury, or death. It is necessary to read, understand and follow all instructions shipped with the product. 2. Systems on operating equipment must be tested each day prior to the equipment operation. The equipment operator must check for proper operation at the beginning of every shift or safety inspection period. 3.
4. Place the sensor in active mode. Make sure the equipment has been secured and remains stationary. 5. Verify the sensor is operational. Depending on operator notification, this may be: green LED (for display), green icon (in-cab video monitor), or beep (buzzer or SAS). 6. Assure the detection zone has been cleared of all obstacles. Any obstacles in the detection zone will interfere with the test. 7.
Troubleshooting The troubleshooting below is for the most common PreView® display. Refer to your display manual for errors code descriptions. Display Status LED is not illuminated. • Verify that DC power (9-33 V) is applied to the sensor. • Verify that the cable between the sensor and display is connected. Display Status LED is RED. • Check connection between display and sensor. Display Status LED is RED and one or more of the Yellow LEDs are illuminated.
Specifications Sensor Specifications Transmitter Connector: Protection Rating: Housing Material: Dimensions: Weight: FMCW Radar @24 GHz See Figure 8, Error! Reference source not found. IP69K Polycarbonate radome 4.90” (w) x 4.06” (h) x 1.28” (d) (12.4 cm x 10.3 cm x 3.25 cm) 1.0 lb (0.45 kg). Operating Temperature: Storage Temperature: Vibration: Shock: Mounting: -40°F to +185F (-40°C to +85°C) -67°F to +221°F (-55°C to +105°C) 25 G, random, all three axis 50 G Four 0.22" (5.
Connector Pin Outs CONNECTOR END VIEW DEUTSCH DT06-08SA-E008 CONNECTOR PIN OUT PIN SIGNAL NAME 1 BATTERY PWR (+) 2 GROUND 3 CAN HIGH 4 CAN LOW 5 DISPLAY PWR (+) 6 DISPLAY GROUND 7 N/C 8 TURN SIGNAL INPUT Figure 8. Deutsch Connector Pin Out (ST97 series) +1.866.977.7326 www.preco.
Warranty Information MANUFACTURER STANDARD LIMITED WARRANTY AND LIMITATION OF LIABILITY Manufacturer warrants that on the Date of Purchase this Product will conform to Manufacturer's published specifications for the product, which are available from Manufacturer on request, and Manufacturer warrants that the product is free from defects in materials and workmanship. This Limited Warranty for the sensor extends for sixty (60) months from the date of shipment.
More PRECO Electronics® Safety Products PreView® Radar Blind Spot Monitoring • Sentry® - 150° fully adjustable detection zone. Detects distance, relative velocity, and angle of up to 16 objects simultaneously from 0 to 30 m (98’) away. • Side Defender® - 150° intelligent side object detection radar. Ignores guardrails while warning of vehicles and people in your side blind spots. • Xtreme – Designed for equipment used in extreme mining conditions. Variable detection ranges up to 10 m (32’) available.
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