DRB-Vehicle Profile Detector

Overview

The Vehicle Profile Detection (VPD) sensor interfaces to the TCS2 through a direct RS4895 serial connection on the TCS2's Serial Interface Board.  The Serial Interface Board also provides power to the VPD sensor.

Parts

The VPD ships with the following parts for installation:

• TW VPS, APG-IRU2004M Ultrasonic Sensor (TW01505)

• TW VPS, Mounting Bracket

• Tube Clamp (TW01520)

• Fasteners Set (TW01525)

• Sealant Grease (CP10200)

• M12 Female Connector (TW01545)

• Waterproof RJ45 (TW01550)

You will also need an appropriate length of RS422/RS485 Cable (CA05422)

Installation

Install the Vehicle Profile Detection hardware

1. Select the location and mounting method for the Vehicle Profile Sensor.

a. Location:

i. Install the Vehicle Profile Sensor above the tunnel, directly in line with the enter switch.

ii. If the Vehicle Profile Sensor cannot be installed directly in line with the enter switch, install it no more than 1' before the enter switch or 1' after the enter switch.

iii. The Vehicle Profile Sensor should also be aligned so that it is over the middle of the vehicles that pass under it. Warning: If the Vehicle Profile Sensor isn't properly aligned, small trucks (for example, Chevrolet Colorado, Chevrolet S-10, Ford Ranger) might not be identified as open bed trucks.

iv. The average width of a vehicle is approximately 6'.

v. The diameter of the Vehicle Profile Sensor's read area is approximately 38" when the sensor is installed 10' above the floor.

b. Mounting Method:

i. Ceiling

ii. Wall

iii. Horizontal Tube

iv. Vertical Tube

c. Height:

i. No lower than the lowest arch in the tunnel (e.g., 7' 6").

ii. No higher than 10' from the floor surface.

iii. Important: The Vehicle Profile Sensor can be placed above a floor grate. However, when you first configure the Vehicle Profile Sensor in TunnelWatch, if you want the Vehicle Profile Sensor to automatically measure and configure the height, you will need to place a piece of cardboard or plywood over the non-solid surface while the Vehicle Profile Sensor performs the measurement. Once the Vehicle Profile Sensor takes the measurement (and you verify that it appears to be accurate), you can remove the cardboard or plywood.

Overview

The Vehicle Profile Detection (VPD) sensor interfaces to the TCS2 through a direct RS4895 serial connection on the TCS2's Serial Interface Board.  The Serial Interface Board also provides power to the VPD sensor.

Parts

The VPD ships with the following parts for installation:

• TW VPS, APG-IRU2004M Ultrasonic Sensor (TW01505)

• TW VPS, Mounting Bracket

• Tube Clamp (TW01520)

• Fasteners Set (TW01525)

• Sealant Grease (CP10200)

• M12 Female Connector (TW01545)

• Waterproof RJ45 (TW01550)

You will also need an appropriate length of RS422/RS485 Cable (CA05422)

Installation

Install the Vehicle Profile Detection hardware

1. Select the location and mounting method for the Vehicle Profile Sensor.

a. Location:

i. Install the Vehicle Profile Sensor above the tunnel, directly in line with the enter switch.

ii. If the Vehicle Profile Sensor cannot be installed directly in line with the enter switch, install it no more than 1' before the enter switch or 1' after the enter switch.

iii. The Vehicle Profile Sensor should also be aligned so that it is over the middle of the vehicles that pass under it. Warning: If the Vehicle Profile Sensor isn't properly aligned, small trucks (for example, Chevrolet Colorado, Chevrolet S-10, Ford Ranger) might not be identified as open bed trucks.

iv. The average width of a vehicle is approximately 6'.

v. The diameter of the Vehicle Profile Sensor's read area is approximately 38" when the sensor is installed 10' above the floor.

b. Mounting Method:

i. Ceiling

ii. Wall

iii. Horizontal Tube

iv. Vertical Tube

c. Height:

i. No lower than the lowest arch in the tunnel (e.g., 7' 6").

ii. No higher than 10' from the floor surface.

iii. Important: The Vehicle Profile Sensor can be placed above a floor grate. However, when you first configure the Vehicle Profile Sensor in TunnelWatch, if you want the Vehicle Profile Sensor to automatically measure and configure the height, you will need to place a piece of cardboard or plywood over the non-solid surface while the Vehicle Profile Sensor performs the measurement. Once the Vehicle Profile Sensor takes the measurement (and you verify that it appears to be accurate), you can remove the cardboard or plywood.

2. Install the Vehicle Profile Sensor.

Installation Methods

a. Ceiling.

i. Identify the ceiling material to which the mounting bracket will fasten.

ii. Obtain fastening hardware that is appropriate for the identified material.

The bracket provides four ceiling mount holes for fasteners

Each hole is .13" in diameter

iii. Use the fastening hardware to attach the bracket to the ceiling. Tip: Use a level to verify the bottom surface of the mounting bracket is level. Failure to do this can result in inaccurate and missed reads.

iv. Use the four 10-32 x 1/2" stainless SEMS screws to fasten the Vehicle Profile Sensor to the mounting bracket.

v. Use a level to verify the bottom surface of the sensor is not installed at an angle to the ground. Failure to do this can result in inaccurate and missed reads.

b. Wall.

i. Identify the wall material to which the mounting bracket will fasten.

ii. Obtain fastening hardware that is appropriate for the identified material.

The bracket provides two wall mount holes for fasteners

Each hole is .13" in diameter

iii. Use the fastening hardware to attach the bracket to the wall. Tip: Use a level to verify the bottom surface of the mounting bracket is level. Failure to do this can result in inaccurate and missed reads.

iv. Use the four 10-32 x 1/2" stainless SEMS screws to fasten the Vehicle Profile Sensor to the mounting bracket.

v. Use a level to verify the bottom surface of the sensor is level. Failure to do this can result in inaccurate and missed reads.

c. Horizontal Tube.

i. Note: Tube not included.

ii. Install a 2” (outside diameter) tube above the driving surface so that the location requirements specified above are satisfied.

iii. Use the two 1/4-20, 3-1/4" long stainless hex head cap screws, two 1/4-20, two stainless nylon hex locknuts, and four 1/4" stainless flat washers (5/8" outside diameter) to attach the mounting bracket and pipe clamp to the horizontal tube.

Insert the (2) 1/4” stainless hex bolts and washers through the holes in the ultrasonic sensor mounting bracket.

Slide the two halves of the tube clamp over the bolts.

Slide a washer onto each bolt.

Finger-tighten the 1/4” stainless lock nuts onto each bolt.

Slide the tube clamp and bracket onto the tube, to the desired location.

Place a 7/16” wrench over the bolt head while tightening the nut with another 7/16” wrench. Repeat for the other bolt and nut.

iv. Use the four 10-32 x 1/2" stainless SEMS screws to fasten the Vehicle Profile Sensor to the mounting bracket. Note: With raised walls around its perimeter, the mounting bracket resembles a tray. For the horizontal pipe mount, the Vehicle Profile Sensor is fastened to the top/inside part of the tray.

v. Use a level to verify the bottom surface of the sensor is level. Failure to do this can result in inaccurate and missed reads.

d. Vertical Tube.

i. Note: Tube not included.

ii. Install a 2” (outside diameter) tube above the driving surface so that the location requirements specified above are satisfied.

iii. Use the two 1/4-20, 3-1/4" long stainless hex head cap screws, two 1/4-20, two stainless nylon hex locknuts, and four 1/4" stainless flat washers (5/8" outside diameter) to attach the mounting bracket and pipe clamp to the vertical tube.

Insert the (2) 1/4” stainless hex bolts and washers through the holes in the ultrasonic sensor mounting bracket.

Slide the two halves of the tube clamp over the bolts.

Slide another washer onto each bolt.

Finger-tighten the 1/4” stainless lock nuts onto each bolt.

Slide the tube clamp and bracket onto the tube, to the desired location.

Place a 7/16” wrench over the bolt head while tightening the nut with another 7/16” wrench. Repeat for the other bolt and nut.

iv. Use the four 10-32 x 1/2" stainless SEMS screws to fasten the Vehicle Profile Sensor to the mounting bracket. Note: With raised walls around its perimeter, the mounting bracket resembles a tray. For the vertical pipe mount, the Vehicle Profile Sensor is fastened to the bottom/outside part of the tray. The 3-1/4" long stainless hex head cap screws heads and accompanying washers that fasten the bracket to the pipe clamp protrude into the tray area, thereby preventing the Vehicle Profile Sensor from being fastened to the inside of the bracket.

v. Use a level to verify the bottom surface of the sensor is level. Failure to do this can result in inaccurate and missed reads.

3. Connections

a. Apply a small amount of dielectric grease to the contacts of the M12 female connector.

b. Connect and firmly tighten the connector to the VPD sensor to engage the water tight seal.

c. Secure any slack in the cable using cable ties.

4. Interface to the TCS2

a. Connect an RS-422 cable between the TCS2 box and the VPD.

i. The RS-422 cable should be routed from the TCS2 serial interface board directly ot the 1" conduit hole on the left or right side of the TCS2.

ii. DO NOT route the RS-422 cable alongside the high voltage wiring inside or outside the TCS2.

iii. DO NOT route the RS-422 Cable through the inside of the MCC.

iv. DO NOT coil excess RS-422 cable, doing so will cause the cable to pick up the electrical noise.

b. Connect one end of the RS-422 cable to RS-485 port 1 or RS-485 port 2 of the Serial Interface board in the TCS2

i. Connect the shield drain wire to the GND terminal on the serial interface board RS-485 port.

ii. Ensure 1 twisted pair is used for the TX+/TX- signals, and the 2nd twisted pair is used for 24VDC and GND.  This is particularly important for the TX+/TX- signals.

c. Connect the other end of the RS-422 cable to the M12 male connector, DRB part number TW01540. 

i. DO NOT connect the shield drain wire to anything on the VPD sensor end of the RS-422 cable.

5. Configure the TCS2 station

a. Navigate to Setup>Tunnel Related Inputs>VPD

i. Sensor Interface Type: Serial

ii. Sensor Port: Serial Port 5, if connected to the top left serial port on the Serial Interface Board and 6 if connected to the top right.

iii. Sensor Position: Set the position of the VPD sensor Before or After the enter switch.

iv. Sensor Height: If properly communicating press the 'Measure Height' button to obtain the correct height measurement.  If it fails, recheck all connections and power to the VPD as well as the dipswitches on the Serial Interface Board as indicated in the image above.