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1.2. Anatomy of Weather Radar

Antenna:

The main purpose of the antenna is to focus the transmitted power into a small pencil beam

and also to receive and collect the returned signal.

Radome:

Protects the antenna from high winds, dusts, and rain.

Sub reflector:

Directs the signal from the transmitter onto the antenna and also directs the return

signal from the antenna to the receiver.

Receiver

Detects the signal returned from a target.

Transmitter

: Generates the microwave signal at the correct phase and amplitude. For X-band weather

radar, the wavelength of the signal is approximately 3cm.

Radome

Sub reflector

Receiver

Transmitter

Antenna

70km

Figure 1.2: Antenna Type

Axial-feed

Off-axis or
Offset-feed

Cassegrain

Gregorian

Concave
secondary
reflector

Primary
reflector

Feed
antenna

Supports

Содержание WR110

Страница 1: ...INSTALLATION MANUAL WEATHER RADAR MODEL WR110 www furuno com...

Страница 2: ...his value is applied when radar is installed in a public space Value is defined as on human body surface over a 6 minute period with the flux density averaged from the measurement Moreover this measur...

Страница 3: ...is a possibility of receiving an electric shock A worker s safety is guaranteed however the radar s internal protection devices only protect against indirect lightning and surges to the radar componen...

Страница 4: ...PU and others will be shipped by air or sea from Japan to overseas A person who is in charge of installing radar has to keep a packing list in safe because it is written serial number of each unit ATU...

Страница 5: ...truction Material List 13 3 PRIOR CONFIRMATION 14 3 1 Confirmation Items 14 3 2 Power Equipment 14 3 3 Measurements 14 3 4 Network Communication Cable 14 3 5 Precautionary Item 14 4 CONSTRUCTION 15 4...

Страница 6: ...ION ASSESSMENT 49 A A 1 Introduction 49 A 2 Risk Assessment 49 A 2 1 Evaluate the need of protection 49 A 2 2 Assessment of Risk Components 51 A 2 3 Risk Assessment Conclusion 54 A 3 Solution 55 A 4 M...

Страница 7: ...X band radars X is derived from the XX2 secret band It uses smaller wavelength is more sensitive and can detect smaller particles It operates on 2 5 4 cm wavelength and a frequency of 8 12 GHz These...

Страница 8: ...enna and also directs the return signal from the antenna to the receiver Receiver Detects the signal returned from a target Transmitter Generates the microwave signal at the correct phase and amplitud...

Страница 9: ...m The single X band weather radar can be difficult to avoid problems with blind areas due to buildings mountains or strong signal extinction by heavy rain Furuno provide multi radar system that consis...

Страница 10: ...e horizontal axis on the rectangular coordinate graph corresponds to the circles on the polar coordinate graph The vertical axis on the rectangular coordinate graph corresponds to the rotating axis ra...

Страница 11: ...educing the range resolution of the radar Side lobe suppression is helping to eliminate the problem For a radar pulse signal after compression the narrower pulse main lobe is always accompanied by hig...

Страница 12: ...he radar and install the tower It is important to consider any additional space required for crane operation during installation or repair 3 Lightning protection and grounding considerations Provide a...

Страница 13: ...ho Set the sector blank to the obstacle direction nearby When transmitting in the direction of the obstacle some pseudo echoes will be indicated due to reflections therefore set the sector blank until...

Страница 14: ...rge amounts of data Use USB3 0 device type to transfer the data at high speed Recommendations include using a 6TB storage device to save around one half years data compressed UPS Uninterrupted Power S...

Страница 15: ...of IP55 Maximum wind survival 90 m sec Occupied Band Width Below 6 MHz Type of Emission P0N Q0N V0N Amplifier Solid state module Peak Power 100 W Horizontal Duty Ratio Up to 10 Pulse Width Below 50 s...

Страница 16: ...in real time Hardware Parameter Descriptions Unit name WR110 DPU Power supply Accessories DPU PS 100 240VAC 50 60Hz Bundled AC power cord Socket IEC C13 Plug Type B is only for US and Japan 100 to 125...

Страница 17: ...w and download the observation data Requirement It must be connecting to internet Notes 1 Power cord attached on DPU PS and LCD monitor can only use for 100 120V therefore other location using differe...

Страница 18: ...For JCU box with key x2 1 Maintenance tool box Size L410x150x100 mm 1 M10 x400mm threaded bolt Holding the radome cover up above in order to access inside the radome when maintenance 8 M10 nut Fix th...

Страница 19: ...using a wall mount pull box Inner 28mm Outer 36 5mm JIS standard 1 Basic expendable supplies Items Descriptions Qty Heavy Duty Cable Tie 2 types Nylon 6 6 w weather resistance 100mm 150mm Multi Basic...

Страница 20: ...d ATU 4 Do not bend tightly bend place objects on bundle or forcibly pull the power cable Please handle with care 5 If the outlet is dusty or wet be sure to clean it before use 6 Do not handle with we...

Страница 21: ...stand must be considered not to fall down in strong wind or earthquake 5 Keep strictly checking the safe distance when deciding the height of the radar stand written in the Operator s manual 6 ATU wh...

Страница 22: ...cing every parts in JCU 4 1 2 Standard radar stand The radar stand needs a structure as shown in Table A according to its height The height instead of the scaffold is as shown in Figure 4 2 from the w...

Страница 23: ...ossible to do direct ATU from the work plane The scaffold should be able to store for safety in case this height may hit to the people Be aware not to make the scaffold too wide because it will be hea...

Страница 24: ...ast one place where the service engineer can go through However do not set it on the cable introduction side of ATU Because there is a cable protection tube The scaffold may not need to fold if there...

Страница 25: ...ecommended to be rustproofed iron Scaffolding is recommended to set two different heights that assuming to maintain the inter parts of the radome or a case of removing the upper radome ATU mounting br...

Страница 26: ...e Height 1650 mm mm Standing position of scaffold when lifting up the upper radome Required height when lifting up the upper radome Height is different as Figure 4 5 It recommends 400mm depth if using...

Страница 27: ...e radome top high enough to check the position of antenna and rotate the antenna elevation upward by holding the counter weight arm by hand if it is facing horizontally Use some pillows or lumber unde...

Страница 28: ...y damage radome base 4 Hold handles to lift up the internal unit Beware the antenna feed arm can easy to damage or break Any deformation of the antenna arm can cause functional issues and degrade ante...

Страница 29: ...internal unit may be damage while lifting Turn the lifting fixture outward by slightly loosening M16 nut And fasten M16 nut before hoisting the ATU Use a soft protective cover to shield radome for pr...

Страница 30: ...ble must be in the center between lines If the bubble is on the line or over the line it means the angle is over 0 3 degrees The level adjustment will be completed after all M16 nuts are tightened 500...

Страница 31: ...L and 3 radar stand should not have any gap when tightening the 4 nut NG OK Caution Do not tighten 4 nut before 1 nut and 2 Flat washer touch firmly to 3 Radar stand Otherwise the chassis of the anten...

Страница 32: ...me 3 Insert threaded bolts with nut setup 10mm from the end into each thru hole from bottom radome to upper radome nut insert 4 Lift up the upper radome until M10 nut contacts radome base and hold it...

Страница 33: ...ighten it 2 Lift up the upper radome around 10mm and rotate it counterclockwise 10 degrees 12pcs of M10 bolts tip will fit in to the recess holes of upper radome The nut insert can be seen from the th...

Страница 34: ...ten the spring clamp around the center of bolt as shown below 1 Insert each threaded bolt thru holes from the bottom radome to fix them by the nut inserts by hands 10mm Caution Rotate the antenna to p...

Страница 35: ...of the flange 7 Check antenna orientation If the antenna is facing at horizontal direction then rotate the antenna to a counter weight down to face up around at 90 degrees upward 8 Lift up the upper...

Страница 36: ...asket when fasten the spring clamps Use the spring clamp properly as examples shown below Bad examples Figure 4 20 Space between spring clamp and radome base flange Figure 4 19 Spring clamp is incline...

Страница 37: ...stic Flexible conduit Double weather resistance type Flex PV Polyvinyl tube IP65 or equivalent 1 2 3 Note Tighten up the disuse tube connector with a cap inside to secure waterproof of radome Protecti...

Страница 38: ...ine color of LOAD side Wire color Type JIS P L Line Black N Neutral White E Ground Green 3 Insert the cable into the protecting tube Protecting Tube 1 C1 AC Power cable 3cores C2 LAN cable x2 Protecti...

Страница 39: ...ength of protective tube Respect to JCU DPU the rest of protective tube should be connected to JCU for secure water proof of JCU If it needs to extend protective tube by jointing other protective tube...

Страница 40: ...ied for the local power voltage The JCU type is indicated inside JCU Power Voltage Type 100V to 150V WR110 JCU 100 200V to 240V WR110 JCU 240 Wire color Type JIS IWR US EU P L Black Black Black Brown...

Страница 41: ...rt RainMap operation 2 Press Alt Ctrl click Renew A threshold for adjusting the radar A threshold It will take approx 10 minutes to complete Refer to the Operators manual for detail Setup Data Process...

Страница 42: ...r around noon Refer to section 5 3 5 1 Magnetic Compass Determine actual radar antenna azimuth Refer to the orientation diagram below using magnetic compass Then enter Azimuth Offset into the RainMap...

Страница 43: ...ulse set in the TX menu Pulse No Range km Reso lution Pulse No Range km Reso lution 1 30 75 5 50 75 150 2 30 150 6 30 300 3 50 150 7 50 300 4 70 150 8 70 300 5 Setup Scan as below Scan mode PPI scan E...

Страница 44: ...ide in the sun direction Right Figure 5 2 is an image of sun path There are some exception area where comes the polar night However refer this image to use the solar positioning simulator 5 3 1 DPU ti...

Страница 45: ...nsity 6 Graph of Solar_Azimuthal_Angle and Solar_ Elevation_Angle will be calculated in the value of the solar altitude and azimuth during observed time 7 It determines the precise antenna position by...

Страница 46: ...VI Deviation elevation analysis and adjustment VII Confirm that elevation deviation is revised by Sector RHI VIII Turn OFF the Sector Blank to all direction and restore observation setting to the orig...

Страница 47: ...on spectrum has difficulty to check when sun is blocked by clouds or position of sun is poor during scan 7 Add the average values to the following setup value Go to the process 3 to readjust a value i...

Страница 48: ...accuracy of this algorithm on longitude is 72 degrees of range within 0 0167 degrees However accuracy depends on atmospheric temperature pressure and humidity Therefore under certain circumstances ac...

Страница 49: ...43 6 OUTLINE DRAWING 1 Antenna Unit...

Страница 50: ...44 2 Junction Unit connection box...

Страница 51: ...45 3 Junction Unit Wall mounted type...

Страница 52: ...46 4 Data Processing Unit...

Страница 53: ...47 5 Data Processing Unit Power Supply...

Страница 54: ...ying inside ATU and JCU F1 LINE F1 1 2 3 FG TB2 FG 1 3 TB1 AC100 240V L N E L N E Black White Green L N E AC IN Network Router 2 RJ45 AC IN DVI DC IN USB USB USB3 0 USB3 0 Keyboard AC IN HDMI SPU MONI...

Страница 55: ...nts which make up the risk Calculation of the identified risk components Calculation of the total risk R Identification of the tolerable risk Comparison of the risk R with the tolerable value If R x l...

Страница 56: ...e types of loss relevant to the structure For each type of loss identify and calculate the risk components RA RB RC RM RU RV RW RZ Structure protected Protection needed Calculate new values of risk co...

Страница 57: ...ternal systems immediately endanger human life Component related to failure of internal systems caused by LEMP Loss of type L2 and L4 could occur in all cases along with type L1 in the case of structu...

Страница 58: ...structure touching it there and rotating around it Determination of the value of will be performed graphically or mathematically For an isolated rectangular structure with length L width W and height...

Страница 59: ...lative amount of a particular type of damage for one dangerous event caused by a lightning flash considering both its extent and effects The loss value varies the type of loss considered the weather r...

Страница 60: ...weather radar is not protected by existing lightning rods Total risk value is exceeded of the tolerable risk value We ll propose solution for this later protecting the radar by additional lightning r...

Страница 61: ...3 LPL Probability for min value Minimum peak current kA Probability for max value Minimum peak current kA Rolling sphere radius m I 0 99 3 0 99 200 20 II 0 97 5 0 98 150 30 III 0 91 10 0 95 100 45 IV...

Страница 62: ...ning rod to protect the radar but it is insufficient due to some restrictions Now it has to consider how to adapt the LPL by extending the lightning rod As shown in Table A 8 it needs to extend the ro...

Страница 63: ...ing rod for each LPL is shown in Table A 9 The length will be selected depending on the height limitation therefore it is better to use a longer one Unfortunately in this case it is not enough for pro...

Страница 64: ...e slightly narrower as 45 Because these specifications were old they did not take height in consideration Also the protection area was too large and therefore not safe enough even within the protectio...

Страница 65: ...building Protection level Protection efficiency Rolling sphere method Protection angle method height h Mesh method m Radius m See below I 0 98 20 5 II 0 95 30 10 III 0 9 45 15 IV 0 8 60 20 Applicable...

Страница 66: ...e Domain Name System and it translates the web address into an actual public IP It can be displayed by using the command prompt start run type cmd exe and type ping for the web address At first there...

Страница 67: ...Both sides of connectors have to be the same order Pin Color 1 Yellow White 2 Yellow 3 Green White 4 Blue 5 Blue White 6 Green 7 Brown White 8 Brown Note STP shielded twist pair is required which is s...

Страница 68: ...Black Black Brown N White White White or Gray Blue GND FG Green Yellow Red Terminal Green Green Green Yellow Figure D 2 IEC60320 C13 to Type B Figure D 1 DPU PS outlet IEC60320 C14 Notice Use the suit...

Страница 69: ...e Operator who wants to access by remote to the host TeamViewer must need the local TeamViewer with the same or newer version Moreover the host software must be installed version 13 or newer 3 After i...

Страница 70: ...is on Desktop and Startup 2 RainPlay Shortcut is on Desktop 3 Solar Position Simulator List in Start menu 4 Antenna Position Analysis List in Start menu 5 WR_notice Shortcut is on Desktop 6 WR_transf...

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