12 results about "Radar transmitter" patented technology

The utility model discloses a radar ranging auxiliary device belongs to the shaft ranging technical field, solved the safety risk and the problem of inaccuracy of measurement of original surveying shaft method, the utility model discloses a base disc bottom stand column upper end is connected with the vertical section rotation of surveying pipe, is equipped with the steel wire rope winch on the surveying pipe, is equipped with the first surveying cross bar in the surveying pipe straight section, the upper side of surveying pipe is equipped with pulley device respectively, and the steel wire rope winch is connected with the first surveying cross bar through the pulley device of steel wire rope passing through the upper side of surveying pipe, and the first surveying cross bar end is equipped with radar fixing device, and the bottom of radar fixing device is equipped with the surveying radar transmitter, and the distribution box is equipped on the base stand column, and the distribution box is connected with the surveying radar transmitter electricity through the pulley device of cable passing through the lower side of surveying pipe, and the distribution box is equipped with data receiving display. The utility model improves the measurement speed and accuracy, solves the safety problem of original surveying device use process, and improves the operation efficiency.

The application discloses a radar communication integrated design method and device based on power domain multiplexing, which comprises the following steps: superimposing a radar signal and a communication signal in a time-frequency domain to serve as a radar communication integrated signal; processing the radar signal of the radar communication integrated signal received by a communication receiving end through a time delay frequency difference estimation algorithm, removing the estimated radar signal, separating out the communication signal, and demodulating the communication signal; and directly taking the radar communication integrated signal received by a radar receiving end as a radar signal to perform target detection, so that the purpose of hiding communication information is achieved by hiding the communication signal in the radar transmitting signal; the radar transmitter and the signal processor do not need to be changed, only one more step of removing the radar signal through the time delay frequency difference estimation algorithm is needed for the communication processing system, the change of the whole system is small, the radar and the communication are shared in the time domain and the frequency domain, and the resource utilization rate is effectively improved.

A system and method for verifying the scattering characteristics of an airborne escort target, a two-aircraft formation is constructed for scattering characteristic testing, a forward pod is installed at the wing tip of the leading edge of each aircraft, a rearward pod is installed at the wing tip of the trailing edge, and a complete radar transmitter and receiver are integrated inside each pod, which can independently complete radar signal transmission, scattering signal reception and preliminary processing. The aircraft is equipped with a global positioning system and a tactical data link for precise positioning of the aircraft and sharing and collaboration of key information. The invention uses multiple flight strategies such as forward and rear formation, lateral formation and dynamic formation to measure the mutual irradiation of the two aircrafts, comprehensively obtain the forward, rear, lateral and full-angle radar scattering characteristic signals of the target aircraft, generate high-precision two-dimensional radar images by combining echo data processing technology, and accurately locate electromagnetic scattering defects.

The application relates to the field of elevator safety technology, in particular to a brake device for elevator roof collision and falling. The brake device comprises a permanent magnet and a speed sensor fixed to the outer side of the bottom of a car, a spring pin installed on the top of the car and a spring for driving the spring pin to pop out, a telescopic limiting pin and a motor, a limiting plate arranged on the wall of a shaft, an electromagnet, an oil buffer and a relay arranged at the bottom of the shaft, and a PLC controller. The brake device is also provided with a radar transmitter and a radar receiver for continuously measuring the distance between the car and the bottom of the shaft. When the car overspeeds, the acceleration is abnormal, or the distance is less than a safety threshold and the car falls rapidly downwards, the spring pin pops out and cooperates with the limiting plate, meanwhile the electromagnet is electrified to generate a magnetic field with the same pole as the permanent magnet, and the non-contact deceleration buffer is realized through magnetic repulsion; the multiple limiting steps on the limiting plate collide with the spring pin to realize segmented deceleration, and the car is prevented from rebounding upwards. The double-redundancy protection can effectively guarantee the safety of passengers and maintenance personnel.

This application belongs to the field of radar transmitter power testing technology. This application provides a radar transmitter power testing device. In this embodiment, the SMA input port is connected to the power output coupler interface of the transmitter under test. After the transmitter is powered on, the power button is turned on to start the device; the shift switch is adjusted to the corresponding position, and the start button is pressed to test; the RF power detector, operational amplifier, AD conversion chip, CPLD chip, and microcontroller sequentially process the signal output by the transmitter under test to obtain the test results, which are then displayed on a monitor. This device is portable and can test the power and pulse width parameters of the transmitter under test in the field; it can also perform offline transmitter testing, has a high degree of automation, and is simple to operate. Simultaneously, this device can reliably complete the debugging, acceptance testing, inspection, and maintenance of the transmitter.

The application relates to the field of elevator safety technology, in particular to a hierarchical collaborative braking control method for an elevator car under bidirectional out-of-control conditions. The speed sensor is used to collect the speed and acceleration of the car in real time, and the radar transmitter and the radar receiver are used to continuously measure the distance between the car and the bottom of the shaft; when the PLC controller judges that the car is overspeeding, the acceleration is abnormal, or the distance is less than the safety threshold and is rapidly downward, the electromagnet is powered to generate a magnetic field with the same polarity as the permanent magnet at the bottom of the car, and a non-contact magnetic repulsion is formed to slow down and buffer; at the same time, the spring pin is ejected and collides with multiple limiting steps on the limiting plates on both sides of the shaft, so that segmented mechanical deceleration is realized. If the electromagnetic brake fails, the oil pressure buffer serves as the final redundant protection. The application realizes unified and collaborative control of the top collision and falling bidirectional out-of-control, and has the advantages of rapid response, stable braking, reliable anti-rebound, and comprehensive redundant protection.

The present disclosure describes a borehole radar system (100) for a drill string (200). The system (100) includes a radar transmitter (102) placed within or adjacent to a housing of a bottom hole assembly (202) of the drill string (200). The radar transmitter (102) includes a transmit antenna (104) for coupling electromagnetic waves to the drill string (200) to propagate in a forward direction along an axis of the drill string (200) in one or more predefined modes including TEM, TE 11 and / or higher order modes. A radar receiver (106) is placed within or adjacent to the housing of the bottom hole assembly (202). The radar receiver (106) includes a receiver antenna (108) adapted to receive electromagnetic waves reflected or scattered from the surrounding medium (302).

The application is based on an X-band power amplifier system of an eight-port radio frequency pulse amplitude control microstrip network, which is composed of a power amplifier driving and sampling comparison module, an eight-port radio frequency pulse amplitude control microstrip network module, a power amplifier module and a power amplifier control and power supply module; a linear frequency modulation pulse signal generated by a radar transmitter is input to the power amplifier driving and sampling comparison module, is amplified by the power amplifier module again through the eight-port radio frequency pulse amplitude control microstrip network module and is output; the power amplifier control and power supply module controls and supplies power to the whole system. The application embeds an eight-port radio frequency pulse amplitude control microstrip network in a radar power amplifier system, directly controls the amplitude of a radar radio frequency pulse envelope signal in a solid-state power amplifier, reduces the sidelobe amplitude of a pulse compression signal in a final receiver, improves the detection ability of a small target and the display effect of a radar echo, and reduces the cost and design complexity of a radar transmitter.

A fully automated airborne flight test system and method for a composite detection device, belonging to the field of equivalent verification of aircraft-borne detection devices, includes a navigation module for acquiring real-time positioning information of the aircraft; a power supply module for connecting to the radar transmitter of the radar detector via a first power supply channel and to all components of the composite detection device except the radar transmitter via a second power supply channel, wherein the power supply of the first power supply channel is greater than that of the second power supply channel; and a control computer for connecting to the radar detection result output port of the radar detector via a high-speed channel and to all other data ports of the composite detection device except the radar detection result output port via a bus channel, wherein the bandwidth of the high-speed channel is greater than that of the bus channel. This application can simultaneously and automatically conduct airborne flight tests of radar and infrared detectors.

Method for recognizing or identifying a radar transmitter, associated device and computer program product. The present invention relates to a method for recognizing or identifying a radar transmitter, comprising the following steps: - receiving a radar signal by a receiver (12), - segmenting the received signal in time and frequency, - demodulating the segmented signal, - extracting a rise edge from the demodulated signal, - calculating the real and imaginary parts of the rise edge as a function of time, - defining a path associated with the signal, - scaling the path so that the scaled path is invariant to an initial phase of the received signal, and - comparing the path associated with the scaled signal with at least one reference path, independently of the travel speeds of said paths. The invention further relates to an associated device and computer program product. Figure for the abstract: Fig 1

The embodiment of the application provides a pulse radar transmitter chip and electronic equipment, and belongs to the chip technical field.The pulse radar transmitter chip comprises a direct pulse generation circuit, a full-digital power amplifier and an output matching network which are sequentially connected.The direct pulse generation circuit works at an ultra-wideband frequency and comprises a pulse generation sub-circuit and a pulse modulation sub-circuit.The pulse generation sub-circuit is used for generating at least n delay different pulse signals, and n is an integer greater than or equal to 2.The pulse modulation sub-circuit is m, which is used for modulating the pulse signals on the pulse signal output end of the pulse generation sub-circuit into pulse control signals, and m is an integer greater than or equal to 1.The embodiment of the application can generate high-precision radar pulse signals, and the whole circuit is a full-digital circuit, so that the power consumption is low, thereby improving standby and working time of the UWB system whole machine based on the chip.

The present invention relates to a central unit (Z) for a distributed radar system, which can be operated, for example, in a means of transportation. The central unit (Z) is configured to provide a first transmit signal (SC) in the form of a continuous sequence of chirp signals to a designated radar transmitter unit, and to provide second transmit signals (SI) alternately in the form of an intermittent sequence of chirp signals to the other radar transmitter units. The chirp signals of the first transmit signal (SC) and the chirp signals of the second transmit signals (SI) have the same signal waveform but different modulation times. The chirp signals of the first transmit signal (SC) are also transmitted during pauses between the chirp signals of the second transmit signals (SI). The first radar echo signal (RC) resulting from the first transmit signal (SC) is evaluated for a Doppler measurement.The second radar echo signals (RI) resulting from the second transmitted signals (SI) are used for detecting objects in the surrounding area. The present invention further relates to a distributed radar system with such a central unit (Z), as well as a transmitting module and a receiving module for a distributed radar system. The invention also relates to a method and a computer program for operating such a central unit (Z), as well as a means of transport comprising a distributed radar system with such a central unit (Z).