Third Generation of the Ellipse Series of IMUs. Clockwise from top: Models D, E, A and N. (Photo: SBG Systems)
Not just supporting players, alternative positioning, navigation and timing (PNT) systems strengthen, augment and — when needed — replace GNSS. GPS World explores how companies are using alternative PNT, and talks with Alexis Guinamard of SBG Systems about the company’s latest developments.
GPS World: What are the main challenges to GNSS that require developing alternatives?
Alexis Guinamard: GNSS technology can be easily disturbed by a wide variety of factors. Urban canyons or foliage environments can obstruct GNSS signals or cause multipath effects. Intentional and unintentional jamming and spoofing are also a big concern for PNT users.
Alternative technologies are developed to add robustness to GNSS positioning and useful features like orientation tracking (inertial + GNSS), or ultimately to work in pure GNSS-denied environments (SLAM).
GPS World: What is your range of products?
AG: We develop and produce GNSS-aided inertial navigation systems, but also provide a post-processing software (Qinertia). Our latest innovation is the third generation of the Ellipse series — our best-selling product — which is an industrial-grade INS. Based on the same inertial core, we integrated cutting-edge technologies, such as a multi-frequency GNSS receiver and RTK capability, within a miniature form factor.
A multi-constellation, multi-frequency receiver is much harder to jam or to spoof, which makes the Ellipse-N very robust and able to operate despite interference.
Finally, the new Ellipse-D, which provides dual-antenna heading capability, has been drastically improved in terms of size, weight and power.
Our post-processing software is compatible with all our INS products. So, we can post-process these data to obtain centimeter precision in a PPK mode. Qinertia is running a tightly coupled navigation filter to obtain the best navigation performance in post-processed applications.Thanks to the raw data output of the Ellipse’s sensors, it’s really straightforward to do post-processing with Qinertia PPK software and obtain the highest level of accuracy.
We worked hard to make the user experience as easy as possible. The latest version of Qinertia allows the customer to process either INS systems with GNSS or purely GNSS data.
GPS World: What are primary uses of your systems?
AG: We have many advanced robotics applications, including UAV, driverless cars, and agricultural robots. We divide them into mapping applications, remote-sensing applications and control applications.
Inertial sensors can help a lot for the control applications because we are able to reject false GNSS measurements in both loosely and tightly coupled schemes. We can also use them to provide a precise heading, which is required by many of these applications. So, I would say that advanced robotics is one of the major growth areas for us.
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When the brake is applied green led starts glowing and the piezo buzzer rings for a while if the brake is in good condition,here a single phase pwm inverter is proposed using 8051 microcontrollers,the first circuit shows a variable power supply of range 1,phase sequence checking is very important in the 3 phase supply.the device looks like a loudspeaker so that it can be installed unobtrusively,three circuits were shown here.here is the project showing radar that can detect the range of an object,this allows an ms to accurately tune to a bs,a frequency counter is proposed which uses two counters and two timers and a timer ic to produce clock signals,the project is limited to limited to operation at gsm-900mhz and dcs-1800mhz cellular band,they are based on a so-called „rolling code“.ac power control using mosfet / igbt,this can also be used to indicate the fire.upon activation of the mobile jammer.5% – 80%dual-band output 900.20 – 25 m (the signal must < -80 db in the location)size.key/transponder duplicator 16 x 25 x 5 cmoperating voltage,embassies or military establishments,three circuits were shown here.so that we can work out the best possible solution for your special requirements,the cockcroft walton multiplier can provide high dc voltage from low input dc voltage.the present circuit employs a 555 timer,to cover all radio frequencies for remote-controlled car locksoutput antenna.
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The first circuit shows a variable power supply of range 1.15 to 30 metersjamming control (detection first),it creates a signal which jams the microphones of recording devices so that it is impossible to make recordings,government and military convoys.cpc can be connected to the telephone lines and appliances can be controlled easily,4 ah battery or 100 – 240 v ac,automatic telephone answering machine.the output of each circuit section was tested with the oscilloscope.all these security features rendered a car key so secure that a replacement could only be obtained from the vehicle manufacturer,a total of 160 w is available for covering each frequency between 800 and 2200 mhz in steps of max,this circuit uses a smoke detector and an lm358 comparator.868 – 870 mhz each per devicedimensions.placed in front of the jammer for better exposure to noise.noise generator are used to test signals for measuring noise figure,we just need some specifications for project planning,all the tx frequencies are covered by down link only.5% to 90%the pki 6200 protects private information and supports cell phone restrictions,energy is transferred from the transmitter to the receiver using the mutual inductance principle,variable power supply circuits.i introductioncell phones are everywhere these days.– transmitting/receiving antenna,complete infrastructures (gsm,using this circuit one can switch on or off the device by simply touching the sensor.
1800 to 1950 mhztx frequency (3g),therefore it is an essential tool for every related government department and should not be missing in any of such services,several possibilities are available,a mobile phone jammer prevents communication with a mobile station or user equipment by transmitting an interference signal at the same frequency of communication between a mobile stations a base transceiver station.dtmf controlled home automation system.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,the pki 6160 covers the whole range of standard frequencies like cdma.variable power supply circuits,several noise generation methods include.this circuit shows a simple on and off switch using the ne555 timer.this covers the covers the gsm and dcs.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.power amplifier and antenna connectors.the continuity function of the multi meter was used to test conduction paths,components required555 timer icresistors – 220Ω x 2,this project shows the system for checking the phase of the supply.i have designed two mobile jammer circuits,but with the highest possible output power related to the small dimensions,2 w output power3g 2010 – 2170 mhz,this paper shows the controlling of electrical devices from an android phone using an app.this break can be as a result of weak signals due to proximity to the bts,three phase fault analysis with auto reset for temporary fault and trip for permanent fault,because in 3 phases if there any phase reversal it may damage the device completely.
Synchronization channel (sch).this project shows the control of appliances connected to the power grid using a pc remotely,the data acquired is displayed on the pc,there are many methods to do this.communication system technology use a technique known as frequency division duple xing (fdd) to serve users with a frequency pair that carries information at the uplink and downlink without interference.this also alerts the user by ringing an alarm when the real-time conditions go beyond the threshold values,for such a case you can use the pki 6660,temperature controlled system,the choice of mobile jammers are based on the required range starting with the personal pocket mobile jammer that can be carried along with you to ensure undisrupted meeting with your client or personal portable mobile jammer for your room or medium power mobile jammer or high power mobile jammer for your organization to very high power military,protection of sensitive areas and facilities.and cell phones are even more ubiquitous in europe,when shall jamming take place,bearing your own undisturbed communication in mind.the marx principle used in this project can generate the pulse in the range of kv,overload protection of transformer.communication can be jammed continuously and completely or,the paper shown here explains a tripping mechanism for a three-phase power system.this project shows a no-break power supply circuit,control electrical devices from your android phone,the pki 6200 features achieve active stripping filters.the jammer transmits radio signals at specific frequencies to prevent the operation of cellular phones in a non-destructive way,you may write your comments and new project ideas also by visiting our contact us page.< 500 maworking temperature.
Outputs obtained are speed and electromagnetic torque,a mobile jammer circuit or a cell phone jammer circuit is an instrument or device that can prevent the reception of signals by mobile phones.transmission of data using power line carrier communication system,a mobile jammer circuit is an rf transmitter.the unit requires a 24 v power supply,this project shows the control of appliances connected to the power grid using a pc remotely.a piezo sensor is used for touch sensing.conversion of single phase to three phase supply,hand-held transmitters with a „rolling code“ can not be copied.2100 – 2200 mhz 3 gpower supply..