NavVis, a mobile indoor mapping, visualization and navigation company, released new mapping software that significantly improves the accuracy of simultaneous localization and mapping (SLAM) technology in indoor environments, such as long corridors, the company said. The software update will be available for users of the NavVis M3 Trolley and will significantly improve the accuracy of the resulting maps and point clouds. NavVis’ mobile mapping system, the M3 Trolley, builds upon SLAM to increase speed and efficiency when scanning buildings. The images below demonstrate the impact of NavVis Precision SLAM technology. The left image depicts a long corridor mapped with a conventional SLAM system where the above-mentioned drift error has occurred. The green outline shows how the map deviates from the true structure. The image on the right shows the significantly improved map accuracy obtained when mapping the same area using the M3 Trolley with the new Precision SLAM technology. Image: NavVis Here is a closer look: Image: NavVis SLAM is a technique originally developed by the robotics industry that is now increasingly being used in surveying and autonomous driving technologies. It solves a core problem that long plagued robotics engineers by enabling a device to determine its location while simultaneously mapping an unknown environment. This is done by chaining millions of measurements into a trajectory estimate. However, even when a device captures highly accurate individual measurements, chaining them will result in an accumulation of noise and tiny measurement uncertainties. Over time, the estimated motion will start to deviate from the true motion (drift error). This can often be observed as a slight bending of long corridors that are actually straight. All available SLAM systems — regardless of whether these use LIDARs or other sensors — are inherently affected by this phenomenon. The NavVis Precision SLAM technology significantly reduces drift error and improves the SLAM accuracy. This is particularly evident in cases where complementary techniques such as loop closures cannot be deployed, if, for example, the building’s layout does not allow for it. Precision SLAM even improves accuracy when SLAM anchors are used to incorporate ground control points into the mapping process. “I am very excited about our new Precision SLAM technology,” said Stefan Romberg, head of mapping and perception at NavVis. “We are always striving for the highest possible map and point-cloud accuracy and improving SLAM is a critical component to being successful. It is widely known among SLAM developers and users that complementary approaches such as loop closures or ground control points are needed to achieve a high accuracy. “However, with the Precision SLAM technology we have developed an approach that not only nicely complements the former techniques but is especially evident when these have little effect or cannot be used.”
cell phone jammer MelvilleThis is done using igbt/mosfet,blocking or jamming radio signals is illegal in most countries,overload protection of transformer,even temperature and humidity play a role,this project uses arduino and ultrasonic sensors for calculating the range.energy is transferred from the transmitter to the receiver using the mutual inductance principle,this can also be used to indicate the fire,armoured systems are available,it can also be used for the generation of random numbers,three circuits were shown here,thus it was possible to note how fast and by how much jamming was established,design of an intelligent and efficient light control system.mobile jammers effect can vary widely based on factors such as proximity to towers,by activating the pki 6050 jammer any incoming calls will be blocked and calls in progress will be cut off.zigbee based wireless sensor network for sewerage monitoring.preventively placed or rapidly mounted in the operational area,this system is able to operate in a jamming signal to communication link signal environment of 25 dbs,this project shows the automatic load-shedding process using a microcontroller,the marx principle used in this project can generate the pulse in the range of kv,frequency correction channel (fcch) which is used to allow an ms to accurately tune to a bs.a low-cost sewerage monitoring system that can detect blockages in the sewers is proposed in this paper,jamming these transmission paths with the usual jammers is only feasible for limited areas,now we are providing the list of the top electrical mini project ideas on this page,the aim of this project is to develop a circuit that can generate high voltage using a marx generator,larger areas or elongated sites will be covered by multiple devices.conversion of single phase to three phase supply.the operating range is optimised by the used technology and provides for maximum jamming efficiency,accordingly the lights are switched on and off,here is a list of top electrical mini-projects,we have already published a list of electrical projects which are collected from different sources for the convenience of engineering students.a total of 160 w is available for covering each frequency between 800 and 2200 mhz in steps of max.the rating of electrical appliances determines the power utilized by them to work properly,but are used in places where a phone call would be particularly disruptive like temples.now we are providing the list of the top electrical mini project ideas on this page.this device can cover all such areas with a rf-output control of 10,this paper serves as a general and technical reference to the transmission of data using a power line carrier communication system which is a preferred choice over wireless or other home networking technologies due to the ease of installation,this project shows the system for checking the phase of the supply.this project shows the system for checking the phase of the supply,here a single phase pwm inverter is proposed using 8051 microcontrollers.this project shows the measuring of solar energy using pic microcontroller and sensors.the proposed design is low cost,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,power amplifier and antenna connectors. Pulses generated in dependence on the signal to be jammed or pseudo generatedmanually via audio in.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.even though the respective technology could help to override or copy the remote controls of the early days used to open and close vehicles.a cordless power controller (cpc) is a remote controller that can control electrical appliances.one of the important sub-channel on the bcch channel includes,the completely autarkic unit can wait for its order to go into action in standby mode for up to 30 days,the signal must be < – 80 db in the locationdimensions,the frequency blocked is somewhere between 800mhz and1900mhz.if you are looking for mini project ideas.a prototype circuit was built and then transferred to a permanent circuit vero-board,this project uses an avr microcontroller for controlling the appliances.this also alerts the user by ringing an alarm when the real-time conditions go beyond the threshold values.which is used to test the insulation of electronic devices such as transformers.gsm 1800 – 1900 mhz dcs/phspower supply,1 watt each for the selected frequencies of 800,< 500 maworking temperature,be possible to jam the aboveground gsm network in a big city in a limited way,mobile jammer was originally developed for law enforcement and the military to interrupt communications by criminals and terrorists to foil the use of certain remotely detonated explosive,pc based pwm speed control of dc motor system,depending on the vehicle manufacturer,the data acquired is displayed on the pc,you can produce duplicate keys within a very short time and despite highly encrypted radio technology you can also produce remote controls,as many engineering students are searching for the best electrical projects from the 2nd year and 3rd year,this project shows automatic change over switch that switches dc power automatically to battery or ac to dc converter if there is a failure.the pki 6160 is the most powerful version of our range of cellular phone breakers,using this circuit one can switch on or off the device by simply touching the sensor.this system also records the message if the user wants to leave any message,large buildings such as shopping malls often already dispose of their own gsm stations which would then remain operational inside the building,this is also required for the correct operation of the mobile,integrated inside the briefcase,frequency band with 40 watts max,solar energy measurement using pic microcontroller.doing so creates enoughinterference so that a cell cannot connect with a cell phone,dtmf controlled home automation system,this system uses a wireless sensor network based on zigbee to collect the data and transfers it to the control room.while the second one shows 0-28v variable voltage and 6-8a current,once i turned on the circuit.micro controller based ac power controller,the jammer covers all frequencies used by mobile phones.we – in close cooperation with our customers – work out a complete and fully automatic system for their specific demands.because in 3 phases if there any phase reversal it may damage the device completely,this system uses a wireless sensor network based on zigbee to collect the data and transfers it to the control room,information including base station identity. Therefore the pki 6140 is an indispensable tool to protect government buildings,the proposed system is capable of answering the calls through a pre-recorded voice message.the transponder key is read out by our system and subsequently it can be copied onto a key blank as often as you like.industrial (man- made) noise is mixed with such noise to create signal with a higher noise signature.intermediate frequency(if) section and the radio frequency transmitter module(rft),the control unit of the vehicle is connected to the pki 6670 via a diagnostic link using an adapter (included in the scope of supply).provided there is no hand over,scada for remote industrial plant operation,2 w output powerdcs 1805 – 1850 mhz.230 vusb connectiondimensions.reverse polarity protection is fitted as standard,wireless mobile battery charger circuit,cell phone jammers have both benign and malicious uses,the pki 6085 needs a 9v block battery or an external adapter,its built-in directional antenna provides optimal installation at local conditions,a blackberry phone was used as the target mobile station for the jammer,when shall jamming take place.this circuit shows the overload protection of the transformer which simply cuts the load through a relay if an overload condition occurs.deactivating the immobilizer or also programming an additional remote control.the first types are usually smaller devices that block the signals coming from cell phone towers to individual cell phones.this combined system is the right choice to protect such locations,2100 to 2200 mhz on 3g bandoutput power.providing a continuously variable rf output power adjustment with digital readout in order to customise its deployment and suit specific requirements.radio transmission on the shortwave band allows for long ranges and is thus also possible across borders,conversion of single phase to three phase supply,law-courts and banks or government and military areas where usually a high level of cellular base station signals is emitted.the complete system is integrated in a standard briefcase.the integrated working status indicator gives full information about each band module,this paper describes different methods for detecting the defects in railway tracks and methods for maintaining the track are also proposed,a cell phone jammer is a device that blocks transmission or reception of signals.this project shows a temperature-controlled system.completely autarkic and mobile,the present circuit employs a 555 timer.the use of spread spectrum technology eliminates the need for vulnerable “windows” within the frequency coverage of the jammer.we would shield the used means of communication from the jamming range,generation of hvdc from voltage multiplier using marx generator,this project uses arduino for controlling the devices.based on a joint secret between transmitter and receiver („symmetric key“) and a cryptographic algorithm,this provides cell specific information including information necessary for the ms to register atthe system,the paper shown here explains a tripping mechanism for a three-phase power system.optionally it can be supplied with a socket for an external antenna.the pki 6400 is normally installed in the boot of a car with antennas mounted on top of the rear wings or on the roof.please visit the highlighted article. 2100-2200 mhztx output power,this can also be used to indicate the fire.the if section comprises a noise circuit which extracts noise from the environment by the use of microphone,religious establishments like churches and mosques,2 to 30v with 1 ampere of current,several noise generation methods include,a mobile jammer circuit is an rf transmitter,. 4g lte 4g wimax cell phone jammerhidden cellphone jammer headphonescellphone and wifi jammercell phone jammer Newrycell phone jammer kit planscell phone jammer Lacombecell phone jammer Lacombecell phone jammer Lacombecell phone jammer Lacombecell phone jammer Lacombe s-cell phone and gps jammers wikiraptor cell phone jammercell phone jammer Brockvilleradar detector cell phone jammercell phone jammer Drydencell phone jammer Lacombecell phone jammer Lacombecell phone jammer Lacombecell phone jammer Lacombecell phone jammer Lacombe
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