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teSentry 

User Manual of Site Sentry ANPR/Speed Camera System

17

Chapter 4

Adjusting the Radar Sensor 

continued

4.1 

An overview and understanding of the COSINE effect

Microwave radars are susceptible to a phenomenon known as the COSINE effect.

This is a generation of a greater speed figure by a reflection from a target vehicle passing 
within close proximity to the radar at an obtuse angle, ie. the closer a vehicle passing is to 
90° adjacent to the radar sensor, then the more likely this same target is to generate a 
‘rogue reflection’, especially if the vehicle has large flat sides like a box van or articulated 
vehicle.

In normal circumstances where a Speed Indicating Device (SID) is placed at the side of a 
road, this issue rarely presents itself as a problem because the SID barely has time to react 
to the ‘spike’ in reported speed as the vehicle passes in close proximity and thus the speed 
message is typically not displayed on the sign. This ‘spike’ can be as much as 180% of the 
actual speed of the tracked target vehicle.

However, since we are recording all reported speeds and conjoining these speed readings 
with real time video footage it is very important that we carry out measures which will 
eliminate the COSINE effect from our recordings.

We have gone to great lengths to provide a set of radar adjustment tools to make this 
mitigation possible, namely, ‘Speed Error Percent’, ‘Speed Negative Error Percent’ and 
‘Speed Distance Disable’ which I will describe in detail with respect to vehicle proximity.

4.2 

Parameters in which the COSINE effect will need mitigation

&

&

circa 4m

COSINE

zone

This vehicle is outside the COSINE ‘Spike’ zone

This vehicle is about to cross into the COSINE
                                                           ‘Spike’ zone

valid speed readings

valid speed readings

Содержание SiteSentry

Страница 1: ...ANPR SPEED CAMERA User Manual...

Страница 2: ...hesitate to contact either ourselves or your appointed dealer This manual may contain several technical incorrect places or printing errors and the content is subject to change without notice Updates...

Страница 3: ...nging from direct access to the system via smart phone or tablet using the systems on board Wi Fi hotspot right up to inclusion into an established local area network via hard wired ethernet or Wi Fi...

Страница 4: ...packaging for this product mains option only 3 Do not connect several devices to the power adapter provided as adapter overload may cause over heating and possible fire hazzard mains option only 4 Pl...

Страница 5: ...lare may occur this is not a malfunction but may impair the endurance of the sensor over time 5 The sensor may be burned by a laser beam so when any laser equipment is being used make sure that the se...

Страница 6: ...ent via CHROME browser 14 2 2 1 Live View 14 2 2 2 Parameters Configuration 14 Chapter 3 Adjusting the camera system to suit your circumstances 15 3 1 Framing the video capture area 15 3 2 Focus and z...

Страница 7: ...nto your local Database 25 5 2 2 Complete Synchronisation 26 5 2 3 Partial Download 27 Chapter 6 Searching and working with Gathered DATA 28 6 1 Searching by Criteria 28 6 1 1 Searching by Date and Ti...

Страница 8: ...entry User Manual of Site Sentry ANPR Speed Camera System 7 Table of Contents continued Appendix1 PTSC 926 Supplementary Speed and Registration Display 37 Appendix2 PTSC 927 Road Legal Mobile Trailer...

Страница 9: ...attempt to observe activity too far away from the Site Sentry Camera as vehicles do need to be within 50 metres in order that their number plates may be read and recorded 2 Having decided on a suitab...

Страница 10: ...y positioning and levelling of the control box prior to the mounting of the camera head Mount the control box and set the level 4 Having established a good sound fixing to your post you will now need...

Страница 11: ...gasket in place offer the camera head for alignment and fix only with 4 bolts provided Taking care to thread the umbilical power and data leads as you go Tighten to a reasonable pressure 6 Make conne...

Страница 12: ...to the mains side of the 5 amp switch mode power supply provided This operation must be carried out by a qualified electrical engineer 9 You are now ready to switch on power at the 240 v AC supply and...

Страница 13: ...try Camera System switched on go to settings on your smart phone and choose the SSID which is published as the one listed on your shipping card Start an internet browser and in the search bar at the t...

Страница 14: ...cameras in the direction of the number plates of passing vehicles 2 1 2 Parameters Configuration The Site Sentry system needs some information from the user which will be site specific for example the...

Страница 15: ...ary CAT5 socket on the front panel of the Site Sentry control panel and this may be used for permanent hard wiring into an existing ethernet network or for temporary connection via a lap top PC or sim...

Страница 16: ...t Explorer Although we pre set these systems prior to leaving our factory and the camera systems are auto focus there may sometimes be a need for the end user to make subtle adjustments to both origin...

Страница 17: ...In order to view these images in Internet Explorer you will need to be connected to the world wide web to allow you to access the Hikvision plugins You will be automatically linked to the Hikvision p...

Страница 18: ...the SID barely has time to react to the spike in reported speed as the vehicle passes in close proximity and thus the speed message is typically not displayed on the sign This spike can be as much as...

Страница 19: ...OSINE spike of say 18 mph The software has the ability to identify the rogue reading and switch off the radar until a reset period has passed or in this case the vehicle has passed Cosine e ect anomal...

Страница 20: ...gin looking at a target vehicle speed and make a rapid comparison between the first speed readings and those after a variable number of milliseconds and thus ignore any early COSINE spikes which might...

Страница 21: ...ehicle from the Site Sentry Camera for the whole period of observation this tool allows us to switch off reporting at a pre determined distance for a given re set period of milliseconds until the vehi...

Страница 22: ...rnatively you may wish to use the removable 1 TB hard drive out of the camera system as a mobile storage device ie plug this into your PC whenever you wish to work with the Site Sentry camera system d...

Страница 23: ...en drive which will contain both the latest version of Site Sentry camera system software and the latest PC shell tool software these will both be indicated with version numbers on the key fob 1 Inser...

Страница 24: ...and Working with the PC Client or shell Tool continued 5 1 2 Creating a shortcut on your PC desktop to your new program 1 Navigate to your local hard drive which is probably called drive C and open th...

Страница 25: ...nt or shell Tool continued 5 1 2 Creating a shortcut on your PC desktop to your new program 4 Browse to ANPR_SC_Start and click OK 5 Having chosen the file you wish to become the short cut click next...

Страница 26: ...ny DATA in your local data base 5 2 1 Choosing how much DATA to bring into your local Database As mentioned at the start of this chapter there may be constraints as to how much free space your local h...

Страница 27: ...nsert the USB removable hard drive from your Site Sentry Camera System into a USB socket on your PC and click import in your new software 2 Browse to your removable hard drive and browse to its conten...

Страница 28: ...tial Download 1 Insert the USB removable hard drive from your Site Sentry Camera System into a USB socket on your PC and click import in your new software 2 Browse to your removable hard drive and bro...

Страница 29: ...apter 6 Searching and working with the Site Sentry data base Start the software from your desktop icon 6 1 Searching by Criteria The beauty of the Site Sentry data base is that it allows you to search...

Страница 30: ...ented with a pair of calendars and clock readings which allow you to search any specific window in time past IT IS IMPORTANT TO NOTE THAT ONLY DAYS MARKED IN RED WILL HAVE VALID RECORD CONTENT These t...

Страница 31: ...m 30 Chapter 6 Searching and working with the Site Sentry data base continued 6 1 2 Searching by Plate Since we employ fuzzy logic to enable plate search this means that you only need to know part of...

Страница 32: ...base continued 6 1 3 Searching by Location This tool allows the user to search by location which would apply if the user is re naming different locations in the user interface settings very useful whe...

Страница 33: ...of Site Sentry ANPR Speed Camera System 32 Chapter 6 Searching and working with the Site Sentry data base continued 6 1 4 Searching by Direction This tool allows the user to search by direction of for...

Страница 34: ...Over Search This very useful tool allows the user at a stroke to sift out speeders and study their misdemeanours 6 2 1 Limit Number of Results Displayed This tool allows the user to limit the number o...

Страница 35: ...and Files 7 1 Choosing a le to export Having searched your data base you may now download an individual file or event per chance you wish to email this to a colleague or a possible offender Click on t...

Страница 36: ...ta base in settings import export and select a given time period and obtain an instant Comma Separated Values file CSV for immediate use in Microsoft Excel or similar data base manipulating package th...

Страница 37: ...to view in your own local database This tool enables you to search the external data base and capture individual events onto your own local data base for future discussion by using the import button...

Страница 38: ...egistration Display This optional additional piece of display hardware will allow you to display to oncoming drivers of vehicles with their own speed and registration This device must be used in conju...

Страница 39: ...he unit leaving our factory but on rare occasions these settings may need to be adjusted by the end user if the device is deployed into an environment where the violation speed threshold is different...

Страница 40: ...teSentry User Manual of Site Sentry ANPR Speed Camera System 39 Select the cd drive on your PC Select the USB folder Extract the CDM drivers...

Страница 41: ...nual of Site Sentry ANPR Speed Camera System 40 Install the USB driver by clicking next After installation click nish Now when the speed sign is connected to your PC the drivers for the USB connection...

Страница 42: ...PC tools software 1 Having installed the USB to RS 232 driver as described in the previous section 2 From the software CD provided open folder Houston Radar operating software 3 Select windows instal...

Страница 43: ...teSentry User Manual of Site Sentry ANPR Speed Camera System 42 3 Software Installation continued 5 Click NEXT 6 Install the utilities by clicking NEXT 7 Select setup application from the list...

Страница 44: ...ser Manual of Site Sentry ANPR Speed Camera System 43 3 Software Installation continued 8 The software suite will now install 9 Installation is now complete and you are ready to communicate with the s...

Страница 45: ...figuring the speed sign The speed sign supports many different user options and configurations that make it a very versatile device A user friendly MS Windows PC based graphical user interface GUI sof...

Страница 46: ...in the supplied USB cable into the speed sign having unscrewed the waterproof USB cover on the side of the sign and click FILE CONNECT TO RADAR at which point the following dialogue box will appear T...

Страница 47: ...ntry User Manual of Site Sentry ANPR Speed Camera System 46 3 Running the software continued 4 The software will automatically discover the radar speed sign 5 Agree by clicking NEXT 6 Agree by clickin...

Страница 48: ...teSentry User Manual of Site Sentry ANPR Speed Camera System 47 If you are going to collect traf c statistics later please sync the radar clock to your PC at this stage by pressing the sync button...

Страница 49: ...48 4 Read the radar configuration Click on the Radar Setup tab The software will read the radar con guration and you should see the screen actual values will depend on your speed sign This screen con...

Страница 50: ...rding all events whether the sign illuminates or not 2 Set the Maximum display limit This will enable you to set an upper limit for the display very useful if you are in a location where drivers may w...

Страница 51: ...splay brightnessisreduced by about 30 from the factory default setting for any ambient lighting condition T hiscan be particularly advantageousfor portable signsoperating solely off a batteryand allow...

Страница 52: ...rite to radar button You must click this button and be presented with the configuration saved message before your changes are saved to the connected sign Special Note To utilise the auxiliary SLOW DOW...

Страница 53: ...0 as indicated here and your unit will have been shipped from our nal inspection testing department with this parameter so set This parameter may be adjusted to see from 10 metres to 100 metres which...

Страница 54: ...27 Road legal trailer mounted battery pack and camera support Choosing a location and positioning the camera trailer 1 Having decided on a suitable location such as a grass verge at the side of a road...

Страница 55: ...ry User Manual of Site Sentry ANPR Speed Camera System 54 Appendix 2 continued 1 Having chosen a safe position for the trailer next level the unit by means of the integral spirit level and three screw...

Страница 56: ...e Sentry ANPR Speed Camera System 55 Appendix 2 continued 2 Having levelled the trailer and pointed it down the road to be monitored now stand up the camera head and secure this mechanism with the two...

Страница 57: ...y switching on the main isolator switch in the battery access box 3 1 1 Switch on the ON switch in the control cabinet using the tablet provided log on to the Wi Fi hot spot provided by your site sent...

Страница 58: ......

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