38results about How to "Consistent range" patented technology

The invention discloses multichannel radar amplitude and phase automatic correcting method and device. The method comprises the following steps of: before a radar system works, respectively feeding the same radio frequency test signal into various receiving channels of a multichannel radar system by a feed source to obtain the phase characteristic and the amplitude characteristic of various receiving channels; calculating a phase difference and an amplitude specific value between other channel signals and a reference signal by using one of channel signals as a reference signal; and then enabling the radar system to work, carrying out automatic correction on target echoes of all the channels by utilizing the obtained phase difference and the amplitude specific value so as to ensure the consistency of all the channels on amplitudes and phases. When a transmission frequency point is changed or a radar working environment is changed, the amplitude and phase characteristics of the receiving channels are unavoidably changed; and the invention can accurately and conveniently measure and correct the change of the amplitude and phase characteristic and ensure the consistency of all the channels, thereby expanding the working frequency range and the environmental adaptability of radar and improving the maintainability of the radar.

An exemplary treatment system can be provided which can include a laser system configured to emit at least one laser beam, and an optical system configured to focus the laser beam(s) to a focal region at a selected distance from a surface of a tissue. The focal region can be configured to illuminate at least a portion of a target. The optical system can cause an irradiation energy transferred to the focal region of the laser beam(s) to (i) generate a plasma in a first region of the tissue adjacent to the target, and (ii) avoid a generation of a plasma in a second region of the tissue. The optical system has a numerical aperture that is in the range of about 0.5 to about 0.9. An exemplary method can also be provided to control such treatment system.

The invention provides a plane diagram combined server type servo system and a control method thereof. A driving coil of a loudspeaker in the system matches a precise diagram position feedback sensor group correspondingly, each diagram position feedback sensor group comprises a medium-high frequency sensing module and a low frequency sensing module at least, the medium-high frequency sensing module and the low frequency sensing module measure medium-high frequency amplitude and low frequency amplitude in vibration of a diaphragm part controlled by the corresponding driving coil respectively, and transmit corresponding measuring signals to a control unit, and the control unit realizes high-speed precise servo control via a digital algorithm. Nonlinear distortion is controlled within the minimal range to the largest extent theoretically, an integral plane diaphragm of brand new design is used to replace a present tapered diaphragm, and waveform can be restored completely. The system is a transduction system in which electronics are combined with machinery deeply and diaphragm motion amplitude is basically consistent with input signals.

The present invention relates to systems to supply medical grade air in which critical flow conditions for delivering oxygen and nitrogen to a system are provided. The ratio of pressure downstream of the orifices to the pressure upstream of orifices for the oxygen and nitrogen is maintained near or below critical pressure ratio.

The invention belongs to the technical field of communication equipment, and concretely relates to an information transmission device and method based on a mobile terminal. The device comprises: an acquisition unit, which obtains a current vibration frequency of the information transmission device after the information transmission device is started and forms an acquisition information output; an information reception unit, which receives an audio signal output by the mobile terminal; a control unit, which forms a control signal output according to the received acquisition information and the audio signal; and a bone conduction unit, which generates mechanical vibration matching the audio signal under the effect of the control signal. The acquisition unit acquires the acquisition information that matches variable noise, the control unit forms a compensation signal output that can inhibit the variable noise on the basis of the acquisition information, the audio signal and/or a feedback signal, and the compensation signal and the variable noise are opposite in phase and consistent in amplitude. A wind noise resistance capability of the information transmission device is provided through the compensation signal, and an anti-interference capability of the information transmission device is improved.

The invention provides a distributed receiving array channel error calibration method based on a microwave photon stable-phase transmission link. The method comprises the following steps that firstly, a correction signal is modulated to an optical domain through a directly modulated laser, then the signal is divided into n optical carrier microwave signals through optical fibers with equal length, a photoelectric detector at each unit position of a receiving end converts the optical microwave signals into equal-phase electric signals and transmits the electric signals to a receiving antenna array so that relative stability of signal phases at all receiving end positions can be ensured; and finally (n+1) paths of equiphase calibration signals enter a receiver from all receiving channels and reference channels, and data analysis and time delay and amplitude phase estimation are carried out at a signal processing terminal. A microwave photon stable-phase transmission link is used for transmitting a calibration signal in a long distance, and it is guaranteed that the amplitude and the phase of the calibration signal fed into a front end of a distributed receiving array channel are kept consistent; and the received calibration signal is processed, and the relative amplitude, phase and time delay error among the channels are estimated.

The invention relates to the field of medical devices, and discloses a semi-automatic cardiopulmonary resuscitation machine. The semi-automatic cardiopulmonary resuscitation machine is simple in operation, easy to learn and use, and can be used for rescuing patients with sudden cardiac arrest. The semi-automatic cardiopulmonary resuscitation machine comprises a lifting system and a cardiopulmonaryresuscitation system, wherein the cardiopulmonary resuscitation system comprises a cover, a shell is arranged below the cover, a hole is arranged in the center of the shell, a pressing rod penetratesthrough the hole, a first up-and-down reciprocating mechanism is arranged above the pressing rod, the first upper and lower reciprocating mechanism is connected with a first shaft 1, the first shaftis arranged on the shell and is located at one side of the pressing rod, and the first shaft is connected with a motor through a first transmission mechanism, the first shaft is connected with a second shaft through a second transmission mechanism, the second shaft is connected with a pressing plate through the upper and lower reciprocating mechanism second, a breathing air bag fixed in the shellis arranged right side below the pressing plate, the breathing air bag is connected with one end of a tube, and the other end of the tube is connected with mask; the lifting system comprises a lifting device and a protective shell, wherein the lifting device is positioned in the protective shell; the upper part of the lifting device is connected with the lower part of the shell; the lower part ofthe lifting device is connected with the plate.

The invention provides an accurate laser marking device and an accurate laser marking method adopting the accurate laser marking device. The accurate laser marking method comprises the following stepsof acquiring an image of a pre-marked area through a camera and transmitting the image to a master control device; setting multiple marking points in the pre-marked area and the marking frequency ofeach of the multiple marking points through the master control device according to the image; generating a marking laser through a laser generator according to an instruction of the master control device; and controlling motion of a galvanometric scanner system through a galvanometric scanner control panel according to the instruction of the master control device to change the propagation direction of the laser. By means of the accurate laser marking method, it is guaranteed that the practical marking range and depth are consistent with the marking range and depth set by an operator in a master control program through correction of the scaling ratio and the offset correction; accordingly, the purpose of accurate marking is achieved.

The invention discloses an antenna array element of a vertically integrated filter. The antenna array element includes a dual polarized cavity filter and a dual polarized radiating element integratedon top of the dual polarized cavity filter; the dual polarized cavity filter is composed of a plurality of dual polarized resonance cavities which are connected in order from bottom to top, and a coupling window is arranged between the adjacent dual polarized resonance cavities. The invention also discloses a millimeter wave antenna array and a millimeter wave communication device. The element integrates the radiating element and the filter in a vertical direction, has the advantages of compact structure and small space occupation, and more importantly, ensures that the phases and amplitudes of signals transmitted by each array element in the antenna array are substantially the same.

The invention relates to an image frequency rejection mixer, which comprises a signal receiver used for carrying out phase change and coupling on an input signal to generate two signals with a specified phase difference; a signal adjusting component connected with the signal receiver and used for separately adjusting the phases and amplitudes of the two signals with the specified phase difference;a frequency mixer connected with the signal adjusting component; and a signal transmitter connected with the two frequency mixers and used for combining the two frequency mixing signals to form an output signal of which the frequency is different from that of the input signal. A phase shift network and an adjusting network are arranged in an intermediate frequency circuit and a local oscillator,so that the phases of intermediate frequency signals (or local oscillator signals and low-frequency signals) input into two frequency mixers are completely orthogonal as much as possible, the amplitudes are basically consistent, the unbalance is reduced, and the image frequency suppression degree and the local oscillator signal suppression degree are optimized.

The invention discloses a self-adaptive shaking special seat for preventing a needle from falling off for pediatric infusion. The self-adaptive shaking special seat comprises a seat plate, arc-shaped strip rods, an infusion chair, an anti-falling fixing rod, safety armrests and a standby arm-chair, wherein two groups of sliding grooves are formed in the top of the seat plate; two groups of sliding blocks are arranged in the sliding grooves in a sliding manner; two groups of arc-shaped strip rods are arranged on the surface of the top of the seat plate; two groups of connecting rods are arranged on the tops of the arc-shaped strip rods; the infusion chair is arranged on the tops of the connecting rods; a U-shaped sliding frame is arranged on the surface of the infusion chair through a hole in a sliding manner; a support frame is arranged on the top of the U-shaped sliding frame; the anti-falling fixing rod is arranged on the top of the U-shaped sliding frame; and the arc-shaped safety armrests are arranged on the surfaces of two sides of the front side of the infusion chair. According to the self-adaptive shaking special seat disclosed by the invention, due to the arrangement of the anti-falling fixing rod and the arc-shaped strip rods, the device can drive the whole device to shake synchronously when the infusion chair shakes, so that the relative stability of the infusion bottle is further maintained so as to reduce the shaking effect, and the needle falling phenomenon is avoided.

A mobile communication base station based on a metamaterial antenna comprises a content access module, a radio remote module, a software radio configuration module and the metamaterial antenna. The content access module receives contents of communication signals of various systems provided by various information sources; the radio remote module is used for converting the communication signals of the various systems between analog radio-frequency signals and baseband signals and processing redundancy in the radio-frequency signals; the software radio configuration module carries out corresponding configuration on the communication signals of the various systems processed by the radio remote module for the metamaterial antenna; the metamaterial antenna converts electrical signals into electromagnetic waves or allows the electromagnetic wave to be converted into the electrical signals. Therefore, consistency of analog discrete components of the mobile communication base station is kept, and consistency of the amplitude and the phase of the signals is guaranteed; the size of a product becomes small, the weight of the product is reduced, and thus miniaturization, a light-weight trend and integration of the whole mobile communication base station are achieved.

The invention provides a basic guiding principle of a new GSM (Global System for Mobile Communication) wireless network planning, points out the development direction of the traditional large 2G (second Generation) wireless networks, invents a unique dual-band frequency joint planning technology under the guidance of the principle, and once plans a dual-band and dual-structure GSM wireless network to a single-structure wireless network or a composite-structure wireless network which takes the single structure as main structure through joint planning in a zone where wireless base stations are densely distributed. A single-structure GSM wireless network planning chart is shown in abstract appended drawings. The technology can theoretically realize the purposes of rapid promoting the capacity of traditional dual-structure wireless networks by a large margin, saving investment and protecting the environment. The invention can reduce the number of neighboring subdistricts defined by each district and promote fusion of the 2G network with the 3G network.

The invention discloses a preparation method of a weight-losing far infrared membrane. The method comprises the steps of mixing, extruding particles, remixing, co-extruding for forming, and standing. According to the weight-losing far infrared membrane, the skin temperature can be increased, the blood circulation is promoted, the amplitude and the frequency of organic molecules in a human body are consistent to those in far infrared vibration, so that skin tissues generate resonance, the skin tissues generate heat along with the increase of the amplitude, then the blood capillary is expanded, blood circulation is promoted, tissue metabolism is accelerated, and the purposes of consuming subcutaneous fat and activating and beautifying skin are achieved finally.

A compensator mounting adjusting device is matched with a compensator; the compensator comprises an outer sleeve, an inner guide pipe, an elastic telescopic pipe and a protective sleeve; the compensator mounting adjusting device comprises an outer ring sleeve and an inner ring sleeve; the outer ring sleeve is connected with one end of the protective sleeve; the inner ring sleeve is connected withone end of the outer sleeve; the outer ring sleeve is arranged on the external wall of the inner ring sleeve in a sleeving manner; the outer ring sleeve is also clamped with the protective sleeve; anaxially distributed temperature scale is pre-arranged on the external wall of the inner ring sleeve; the coincided part of the outer ring sleeve and the inner ring sleeve in the axial direction is adjustable. According to the compensator mounting adjusting device, a fuel pipe compensator can be adjusted and rapidly and accurately mounted according to a site mounting temperature to guarantee the consistency between an actual working temperature range of a fuel pipe and a preset range and guarantee the service life. Compared with a traditional screw rod device, the compensator mounting adjustingdevice has the advantages that the distance between the fuel pipe and a mounting wall surface after mounting is reduced, and the stability and firmness after mounting are enhanced.

The invention relates to a shaping method for a rapid jumping video signal of a mobile analog television. The method comprises the following steps: real-time detecting a black level of a composite video broadcast signal (CVBS) of a last row and a black level of a CVBS of a current row and taking a difference value between the black level of the CVBS of the last row and the black level of the CVBS of the current row as a height difference of the black level of the last row; And calculating compensated levels of all sampling points in the CVBS of the last row point by point by utilizing the black level of the CVBS of the last row and the height difference and compensating black levels of the sampling points by the compensated levels, so that the CVBS has a unified black level. In addition, the invention also discloses a shaping apparatus for a rapid jumping video signal of a mobile analog television. After the application of the embodiment of the invention, when a CVBS level jumps rapidly, the CVBS can have a unified black level and a signal amplitude, so that occurrence of a black vertical strip is avoided.

A voice-frequency signal preprocessing device includes: pre-emphasis circuit, voice-frequency amplification circuit, equalizer, phase-shift circuit and high-pitched and low-pitched voice band-pass filter. The voice-frequency amplification circuit uses CPU unit to control its gain, and the CPU unit can output code signal to said voice-frequency amplification circuit and control its feedback quantity according to detection result of its amplification output signal, and regulate the amplitude of voice-frequency signal. The equalizer and make phase-shift of its output signal, and make it lag at 90 deg. Said invention can make strong/weak voice frequency signal amplitude equally output, can eliminate the whistling due to signal superposition so as to extend the distance (range) of using mike by a user.