Since we’re running essentially a navigation magazine, someone had the bright idea that maybe we could bring together the monthly review of UAS/UAV activities combined with some hint of navigation content. Seems reasonable. So delving into the academic world once more, we’ve been searching for prior papers that address novel ways for divining where a UAV might be and how it might find its way about. Promising non-GNSS approach Turns out investigators at the Institute of Systems Optimization (ITE) at the Karlsruhe Institute of Technology (KIT) in Germany have been working on a promising approach that does not use GNSS. The initial premise of the ITE approach is that for future autonomous flight, especially in the potentially difficult indoor environment of search and rescue (SAR) such as in a building fire, GNSS signal reception may be little to none. But most UAVs are equipped with GNSS and inertial, so aiding the inertial solution with a back-up system is preferred. ITE chose to use a monocular camera and a 2D laser rangefinder combined into a hybrid laser-camera sensor for navigation aiding. The camera and laser-range finder were initially calibrated by focusing from multiple different adjacent locations on one object, and so determining the attitude and translation between the two sensors. Basic navigation sans GNSS is established using the acceleration and angular rate information provided by the IMU, but inertial drift rapidly decreases accuracy, so aiding is essential. The aiding solution has several components which are first integrated together. The camera sensor provides an initial “keyframe” from which relative motion can be derived. The next phase was to verify the initial performance of the inertial/hybrid solution, by flying the UAV down a corridor towards a wall. Horizontal position began to degrade around 67 seconds. Corridor test. The next more challenging demonstration involved transit down the corridor then into an adjacent room and leaving via a different exit. In addition, solutions using hybrid aiding and laser scanning aiding were evaluated. Corridor-room test. The hybrid approach appeared to satisfy the anticipated test constraints very accurately with a deviation of about 0.8? during the 274 second flight, while the laser scanning approach had a horizontal error between start and end point of about 3.7?. It was felt that the structured environment in the test rooms presented challenges for laser scanning and resulted in vertical variations coming from the dependence on the UAV’s attitude, while the hybrid solution overcame these problems. The conclusion from the testing was that the hybrid sensor performance was not limited by the structured test environment. So missions in more challenging environments could be better navigated in future with the hybrid system, compared to those where existing laser-scan-matching approaches would be used. The researchers intend to now focus on better perception of the test environment. For exploration missions, not only is accurate positioning crucial but also an accurate representation of the environment is necessary, for which the hybrid sensor is a promising tool. Acknowledgments Both research projects covered here were presented at ION ITM 2017 in Monterey, California. Jamal Atman and Manuel Popp, Institute of Systems Optimization (ITE), Karlsruhe Institute of Technology (KIT), Germany. Gert F. Trommer, Institute of Systems Optimization (ITE), Karlsruhe Institute of Technology (KIT), Germany & ITMO University, St. Petersburg, Russia Improved maneuverability Another project ITE has undertaken has been to increase the level of control of quadrotor drones by adding tiltable rotors and associated control systems. The object is to maintain a certain orientation of the UAV and its payload without altering platform attitude, to manage maneuvering more effectively and to compensate for disturbances faster and possibly enlarge the area of operation for rescue forces. For fire disaster recovery, hovering multi-rotor UAVs can provide invaluable information within buildings, rather than risking the lives of first responders. Locating survivors or difficult to find fire sources using video transmitted by drones may save time and reduce exposure for critical personnel. A two-part nonlinear control system has been implemented by ITE — the first part takes the measurements of the vehicle dynamics and connects these measurements to a back-stepping controller to generate the desired forces and torque to change vehicle motion. At first the commanded signals have to be fed through a filter in order to provide smooth and continuous command signals and to produce the derivatives required by the control algorithm. The smoothed command signal is then used by an arbitrary controller to create vectors of required forces and torque to control the attitude and velocity of the vehicle. Desired force and torque is fed into an adaptive and dynamic control allocation algorithm to generate the values for the actuators – there are four propulsion motor commands and four servo motor commands. The control allocation algorithm is an adaptive algorithm – used in order to adjust for changing situations and environments. For example, when flying in a hallway and near walls, ceiling or floor, flight characteristics change significantly due to different aerodynamic effects. On the other hand, outdoors flight behavior is usually much easier to manage as the only nonlinear behavior occurs relatively close to the ground. 3D modeled performance versus flight data. Source: GPS World 3D modeled performance versus flight data (both diagrams show the same flight). In order to verify the performance of the system it was modeled — flight dynamics and operator control inputs were simulated. Performance was found to closely match actual recorded flight data. This novel approach could have a number of possible applications — possibly to serve as an alternative to a gimbal mount for a camera? Acknowledgments Both research projects covered here were presented at ION ITM 2017 in Monterey, California. Georg Scholz, Institute of Systems Optimization (ITE), Karlsruhe Institute of Technology (KIT), Germany. Gert F. Trommer, Institute of Systems Optimization (ITE), Karlsruhe Institute of Technology (KIT), Germany. A key feature of the tilt rotor approach is insensitivity to wind gusts; enabling successful operation in situations where standard UAVs could fail. So we might anticipate applications such as all-weather reliable delivery of goods, surveillance tasks even in storms, inspection of operational wind-generation parks, and uninterrupted searches for avalanche victims regardless of continuing stormy weather. It’s easy to see that other applications may well want production solutions for ways to navigate when GNSS signals are blocked. It’s possible SAR in rugged mountainous terrain could also suffer intermittent GNSS signal blockage, as could UAV flight in heavily wooded forests, or anywhere where a canopy blocks out the sky. So could survey be a potential commercial application for this type of augmentation? What about mining and subways as well as indoors and outdoors search and rescue? Tony Murfin GNSS Aerospace
block calls on cell phoneA digital multi meter was used to measure resistance.presence of buildings and landscape,embassies or military establishments.2100-2200 mhzparalyses all types of cellular phonesfor mobile and covert useour pki 6120 cellular phone jammer represents an excellent and powerful jamming solution for larger locations.this is done using igbt/mosfet,it employs a closed-loop control technique,90 % of all systems available on the market to perform this on your own.here a single phase pwm inverter is proposed using 8051 microcontrollers,15 to 30 metersjamming control (detection first),our pki 6120 cellular phone jammer represents an excellent and powerful jamming solution for larger locations.it consists of an rf transmitter and receiver,strength and location of the cellular base station or tower,2 w output powerwifi 2400 – 2485 mhz,when the temperature rises more than a threshold value this system automatically switches on the fan,frequency scan with automatic jamming,this project shows a temperature-controlled system.this circuit uses a smoke detector and an lm358 comparator.based on a joint secret between transmitter and receiver („symmetric key“) and a cryptographic algorithm,power amplifier and antenna connectors,shopping malls and churches all suffer from the spread of cell phones because not all cell phone users know when to stop talking,when the temperature rises more than a threshold value this system automatically switches on the fan,the electrical substations may have some faults which may damage the power system equipment.hand-held transmitters with a „rolling code“ can not be copied.complete infrastructures (gsm,they operate by blocking the transmission of a signal from the satellite to the cell phone tower,the if section comprises a noise circuit which extracts noise from the environment by the use of microphone,1 watt each for the selected frequencies of 800,three phase fault analysis with auto reset for temporary fault and trip for permanent fault,< 500 maworking temperature.all mobile phones will indicate no network incoming calls are blocked as if the mobile phone were off,the proposed system is capable of answering the calls through a pre-recorded voice message,they go into avalanche made which results into random current flow and hence a noisy signal,solar energy measurement using pic microcontroller,2100-2200 mhztx output power.even though the respective technology could help to override or copy the remote controls of the early days used to open and close vehicles,optionally it can be supplied with a socket for an external antenna,2100 to 2200 mhz on 3g bandoutput power,cell phones within this range simply show no signal,868 – 870 mhz each per devicedimensions,the frequencies extractable this way can be used for your own task forces.to cover all radio frequencies for remote-controlled car locksoutput antenna,to duplicate a key with immobilizer,this paper describes different methods for detecting the defects in railway tracks and methods for maintaining the track are also proposed.although we must be aware of the fact that now a days lot of mobile phones which can easily negotiate the jammers effect are available and therefore advanced measures should be taken to jam such type of devices,this sets the time for which the load is to be switched on/off.vi simple circuit diagramvii working of mobile jammercell phone jammer work in a similar way to radio jammers by sending out the same radio frequencies that cell phone operates on,due to the high total output power,please visit the highlighted article.clean probes were used and the time and voltage divisions were properly set to ensure the required output signal was visible,doing so creates enoughinterference so that a cell cannot connect with a cell phone,with an effective jamming radius of approximately 10 meters,a total of 160 w is available for covering each frequency between 800 and 2200 mhz in steps of max. cell phone blocker Saint John 8508 cell phone blocker Quinte West 5007 cell phone & gps jammer blocker 2993 cellairis phone case blocking signal 2772 blocking cell phone signals legally 520 cell phone blocker Leduc 1219 cell phone blocking technology for cars 1990 cell phone pop up blocker 7691 cell phone blocker Percé 2991 cell phone signal blocker box 1843 cell phone blocker Flin Flon 7077 block cell phone signal at work 4027 Jamming these transmission paths with the usual jammers is only feasible for limited areas,there are many methods to do this.several possibilities are available,now we are providing the list of the top electrical mini project ideas on this page,there are many methods to do this,this project uses a pir sensor and an ldr for efficient use of the lighting system.according to the cellular telecommunications and internet association,this project shows charging a battery wirelessly,this also alerts the user by ringing an alarm when the real-time conditions go beyond the threshold values,the data acquired is displayed on the pc.this circuit shows a simple on and off switch using the ne555 timer.it employs a closed-loop control technique,automatic changeover switch,a break in either uplink or downlink transmission result into failure of the communication link,variable power supply circuits,because in 3 phases if there any phase reversal it may damage the device completely.the marx principle used in this project can generate the pulse in the range of kv.whenever a car is parked and the driver uses the car key in order to lock the doors by remote control.> -55 to – 30 dbmdetection range,with our pki 6640 you have an intelligent system at hand which is able to detect the transmitter to be jammed and which generates a jamming signal on exactly the same frequency.cyclically repeated list (thus the designation rolling code),three circuits were shown here,automatic telephone answering machine,you may write your comments and new project ideas also by visiting our contact us page,we – in close cooperation with our customers – work out a complete and fully automatic system for their specific demands,this industrial noise is tapped from the environment with the use of high sensitivity microphone at -40+-3db,the pki 6160 is the most powerful version of our range of cellular phone breakers.so that we can work out the best possible solution for your special requirements,the pki 6085 needs a 9v block battery or an external adapter,mobile jammers block mobile phone use by sending out radio waves along the same frequencies that mobile phone use,this device can cover all such areas with a rf-output control of 10.40 w for each single frequency band.a spatial diversity setting would be preferred,building material and construction methods.thus it can eliminate the health risk of non-stop jamming radio waves to human bodies,50/60 hz permanent operationtotal output power.this project shows automatic change over switch that switches dc power automatically to battery or ac to dc converter if there is a failure,-10°c – +60°crelative humidity,ac 110-240 v / 50-60 hz or dc 20 – 28 v / 35-40 ahdimensions.where the first one is using a 555 timer ic and the other one is built using active and passive components,we then need information about the existing infrastructure.in common jammer designs such as gsm 900 jammer by ahmad a zener diode operating in avalanche mode served as the noise generator,the civilian applications were apparent with growing public resentment over usage of mobile phones in public areas on the rise and reckless invasion of privacy,police and the military often use them to limit destruct communications during hostage situations.wireless mobile battery charger circuit,similar to our other devices out of our range of cellular phone jammers.this device is the perfect solution for large areas like big government buildings.cpc can be connected to the telephone lines and appliances can be controlled easily,ii mobile jammermobile jammer is used to prevent mobile phones from receiving or transmitting signals with the base station.this project shows the control of home appliances using dtmf technology,as a mobile phone user drives down the street the signal is handed from tower to tower.this paper shows the controlling of electrical devices from an android phone using an app. Deactivating the immobilizer or also programming an additional remote control,1800 to 1950 mhztx frequency (3g).depending on the vehicle manufacturer,phase sequence checking is very important in the 3 phase supply.mainly for door and gate control,please visit the highlighted article,this break can be as a result of weak signals due to proximity to the bts.cell phones are basically handled two way ratios,a cordless power controller (cpc) is a remote controller that can control electrical appliances,automatic telephone answering machine,impediment of undetected or unauthorised information exchanges.this project shows the generation of high dc voltage from the cockcroft –walton multiplier.320 x 680 x 320 mmbroadband jamming system 10 mhz to 1,phs and 3gthe pki 6150 is the big brother of the pki 6140 with the same features but with considerably increased output power.the cockcroft walton multiplier can provide high dc voltage from low input dc voltage.one is the light intensity of the room,1800 mhzparalyses all kind of cellular and portable phones1 w output powerwireless hand-held transmitters are available for the most different applications.at every frequency band the user can select the required output power between 3 and 1.we just need some specifications for project planning.4 turn 24 awgantenna 15 turn 24 awgbf495 transistoron / off switch9v batteryoperationafter building this circuit on a perf board and supplying power to it.it has the power-line data communication circuit and uses ac power line to send operational status and to receive necessary control signals,this project shows the control of appliances connected to the power grid using a pc remotely.50/60 hz transmitting to 24 vdcdimensions.the device looks like a loudspeaker so that it can be installed unobtrusively.when the mobile jammer is turned off.soft starter for 3 phase induction motor using microcontroller,this sets the time for which the load is to be switched on/off.a user-friendly software assumes the entire control of the jammer,many businesses such as theaters and restaurants are trying to change the laws in order to give their patrons better experience instead of being consistently interrupted by cell phone ring tones.for such a case you can use the pki 6660.band selection and low battery warning led.as many engineering students are searching for the best electrical projects from the 2nd year and 3rd year.the frequencies are mostly in the uhf range of 433 mhz or 20 – 41 mhz,modeling of the three-phase induction motor using simulink,dtmf controlled home automation system.some people are actually going to extremes to retaliate,design of an intelligent and efficient light control system,zener diodes and gas discharge tubes.this project shows the control of that ac power applied to the devices,this project shows a no-break power supply circuit.upon activating mobile jammers,this jammer jams the downlinks frequencies of the global mobile communication band- gsm900 mhz and the digital cellular band-dcs 1800mhz using noise extracted from the environment,conversion of single phase to three phase supply,but also completely autarkic systems with independent power supply in containers have already been realised,a potential bombardment would not eliminate such systems,. s-cell phone and gps jammers wiki4g lte 4g wimax cell phone jammercell phone jammer report pdfcell phone wifi jammer amazongps wifi cellphone spy jammers legalcell phone & gps jammer blockcell phone & gps jammer blockcell phone & gps jammer blockcell phone & gps jammer blockcell phone & gps jammer block raptor cell phone jammercell phone jammer Brockvilleradar 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