background image

1.4

The line array

A

B

C

+

Figure 1.7: Top view of the three
radars labeled A, B and C.

In some cases it can be decided to mount the three radars in
line with each other, for example when mounting them to the
railing of an o

shore platform. This installation is called a line

array. In this case the central radar needs to be tilted to obtain
a triangular reflection footprint, which is illustrated in Fig. 1.7.
In a line array, the tilting definitions (Fig. 1.3) require that
radar A is positioned between radar B and C. This allows tilting
radar A away from the line B-C and by doing so forming a
triangle with the radar foot prints on the water surface. The
direction of the radar tilt angle is defined with the right hand
rule as shown in Fig. 1.7.

A mounting plate can be used to fix each radar to two horizontal beams at the desired
location (an example sketch of such a plate is given in Fig. 1.9). Upon request, Radac can
supply such a mounting plate (product no. WG-MP-SS). During installation it is advised
to install the mounting plate first and secondly install the radar.

Upon request, Radac can supply an optional frame (product no. WG-MH-SS) that allows
for mounting a radar at angles 0, 5, 10, 15 and 20 [deg] with the horizontal plane shown in
Fig. 1.8). Each frame includes a mounting plate.

Figure 1.8: Optional frame that allows mount-
ing of the radar at di

erent angles (product no.

WG-MH-SS).

Figure 1.9: Optional mounting plate (product
no. WG-MP-SS) for any WaveGuide 5 Com-
pact Radar.

Radar sensor

A

B

C

Tilt angle [deg]

10

0

0

Min. Signal [dB]

25

25

25

Table 1.2: Advised sensor settings specific to a line array.

9

Содержание WaveGuide 5 Direction Onboard 2

Страница 1: ...WaveGuide Direction Onboard 2 User Manual...

Страница 2: ...ual Version 5 2 1 1 4th of Nov 2020 Applicable for product number WG5 DO2 CP Related to software versions do2 5 2 1 Radac B V Elektronicaweg 16b 2628 XG Delft The Netherlands tel 31 0 15 890 3203 e ma...

Страница 3: ...of the local requirements and regulations for installation of electronic equipment The information in this installation guide is the copyright property of Radac BV the Netehrlands Radac BV disclaims...

Страница 4: ...Step 2 Become an authorized user 17 Step 3 Configuration 18 Step 3 1 Set system date and time 18 Step 3 2 Adjust network settings 19 Step 3 3 Sensor configuration 20 Step 4 Perform a system check 23 S...

Страница 5: ...the distance between the water surface and their antennas with an accuracy of 1 cm The WaveGuide sensors are available in two versions The Explosion proof version where the electronics are build into...

Страница 6: ...approval certificate Warning In hazardous areas it is compulsory to Use personal protection and safety gear such as hard hat fire resistive overall safety shoes safety glasses and working gloves Avoid...

Страница 7: ...advised to mount the sensors at a position facing the mean wave direction so that they can measure the least disturbed water surface As each vessel has a unique shape it is the user s responsibility...

Страница 8: ...sea surface at mean water level The point array is the recommended configuration in most situations For that pur pose a 10 deg radar mounting frame WG5 MPD10 CP can be supplied by Radac Here the thre...

Страница 9: ...nce North When specifying a tilt angle for radar B and C the tilting direction will be aligned with the position of radar A and the tilt angle will be positive when tilting away from A Right hand rule...

Страница 10: ...ovide the mounting plates alone product no WG5 MPD10 CP or the mounting plates to gether with a mounting frame product no WG5 MD10 CP Those standard solutions allow for easy and accurate mounting of t...

Страница 11: ...e should be left between the radars and the structure they are mounted to That is to prevent reflections as explained in the beginning of this chapter If the customer chooses to design and manufacture...

Страница 12: ...th the right hand rule as shown in Fig 1 7 A mounting plate can be used to fix each radar to two horizontal beams at the desired location an example sketch of such a plate is given in Fig 1 9 Upon req...

Страница 13: ...portant to use the WaveGuide OnBoard 2 sensor as Radar A A mounting plate can be used to fix each radar to two horizontal beams at the desired location an example sketch of such a plate is given in Fi...

Страница 14: ...e three radars and the processing unit must be powered and connected to a local network The processing unit provides the option to export data over Ethernet or two RS232 serial ports and allows the us...

Страница 15: ...or as well as a ground connection point as shown in Fig 2 2 The six pole connector is used to connect the Ethernet data wires The poles labeled with Tx Tx Rx and Rx relate to RJ45 pins 1 2 3 and 6 Add...

Страница 16: ...heck that power is applied to the right connector before connecting it Warning Make sure the housing of the device is properly connected to the ground reference Make sure the electrical resistance of...

Страница 17: ...ng unit The connector panel of the WaveGuide processing unit includes the following functional connectors COM1 Serial port for RS 232 data output COM2 Serial port for RS 232 data output USB For connec...

Страница 18: ...y on the processing unit shows system information and measured parameters and is controlled using the buttons on the front Left and right To switch between groups Up and down To switch between items w...

Страница 19: ...process its IP address can be found via the LCD display it can take up to 5 minutes for the IP address to appear To view the IP address scroll through the menu using the left and right buttons until n...

Страница 20: ...n dialogue will appear when the user enters the configuration page The authorization will be valid for a duration of 30 minutes However the web browser may store the login name and password In that ca...

Страница 21: ...e to automatically correct its system time to UTC time For the NTP service to work the system needs to be connected to the Internet as it needs to be able to reach its default NTP servers In the case...

Страница 22: ...rk settings from a DHCP server and assure from the side of the DHCP server that the system will receive the same IP address at all times This setting provides the easiest setup and ensures the correct...

Страница 23: ...nsors The identity of each sensor is defined by its serial number which is shown on the type plate In the box labelled as Distance cm fill in the distances between the radar reference points see Fig 1...

Страница 24: ...or C Mounting height The mounting height is defined as the height of a radar above the reference water level in m The reference point for measuring the height of each radar is the lower side of the r...

Страница 25: ...those reflecting surfaces The range minimum parameter should not be lower than 2 m to avoid interference with the internal reflection in the radar antenna Min Signal The signal minimum is the lower li...

Страница 26: ...s shown in Fig 3 8 A communication status INIT indicates that the WaveGuide processing unit is initiating the communication process with the radar sensors Once the communication process is initiated a...

Страница 27: ...by the multiple signal reflections between radar water surface and any objects within the radar foot print The leftmost peak is generated by the so called internal reflection The signal processing tak...

Страница 28: ...unit can transmit measured and calculated data via its serial ports COM1 COM2 and distribute data over the network to several addresses at the same time In the Subscriptions page under Configuration F...

Страница 29: ...on the 1st of January 1970 Each line in the Default format ends with a Line Feed character char10 When a parameter is disapproved or not available the string NaN is inserted instead of the actual val...

Страница 30: ...re separated by a semicolon and the 51 spectrum values czz10 are included The NaN string is replaced with a 9999 string An example of the output string in the FGTI format is time 1516884540000 sensor...

Страница 31: ...generate and download the diagnostics file and that it can contain up to 100 kB of data It is recommended to share the diagnostics file with Radac B V because it can help with providing future techni...

Страница 32: ...minute observation block is chosen as a compromise between short enough to obtain small variance in the statistical parameters and long enough to assume it to be a stationary process The time stamp us...

Страница 33: ...scroll to the storage menu Then click the down button to arrive at the Safely remove OK option Clicking the OK button safely unmounts the device The Data Logger page in the web user interface Fig 4 1...

Страница 34: ...m2 Hz WTBH Table of wave heights cm WTBT Table of wave periods s Table 2 Spectra and wave tables motion compensated Name Description Unit Hm0 Significant wave height from M0 cm M0 Band energy from Czz...

Страница 35: ...in the vertical direction Ngd_zP Percentage of data points that do not contain error code before preprocessing Nu_z Number of valid data points that are rejected because of 0 sigma errors Nv_z number...

Страница 36: ...0 100 mHz B4 Peak frequency band fmax f to fmax f mHz Table 9 Frequency bands from 5 mHz spectra Per frequency band 2 parameters are calculated These parameters are given in Table 10 Name Description...

Страница 37: ...titude range Roll 15 to 15 deg Pitch 15 to 15 deg Max yaw rate 6 deg min 1 Valid for a still water surface 2 For a water surface with waves 3 The accuracy of the wave parameters is not limited by the...

Страница 38: ...00 Ingress protection IP67 Motion sensor Acceleration range 4 g Attitude accuracy 0 02 deg for roll and pitch Communication Network 1x Ethernet Data storage 32 GB SD card WaveGuide Processing Unit Des...

Страница 39: ...2 168 111 71 If the connection lasts between 2 and 10 seconds nothing happens During this phase the LED stops blinking After 10 seconds the LED starts blinking again If the connection lasts more than...

Страница 40: ...ork is detected Check the network cable connections Blink 2 times The system is working normally This is the default mode Blink 3 times The ip address was set to the default 192 168 111 71 Check chapt...

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