85results about How to "Realize the zoom function" patented technology

The invention provides a wide band amplifier with frequency compensation, wherein the working frequency range of a circuit of the amplifier can be expanded by means of frequency compensation. The wide band amplifier has a structure of an input/output circuit, wherein the circuit structure comprises a first transconductance amplifying unit, a second transconductance unit equivalent to a load circuit, two frequency compensation resistors embedded to a feedback loop of the second transconductance unit, and two capacitors equivalent to the load introduced by a post-stage circuit. The first transconductance amplifying unit has a structure of an input/output circuit, and is connected in series with the second transconductance unit of the feedback circuit structure. Two frequency compensation resistors are respectively matched with a parasitic input resistor at corresponding input end of the second transconductance unit to form a capacitance-resistance low-pass filter circuit by which a zero point is introduced in a transmission function of the wide band amplifier to expand the frequency working range of the wide band amplifier under the effect of the loop feedback. The wide band amplifier provided by the invention is used as the base amplifier unit applied to a radio frequency simulating front end of a receiver so as to achieve amplifying of an intermediate frequency signal. The wide band amplifier can also be applied to other systems to achieve amplification of a broadband.

The invention discloses a camera module and electronic equipment, and belongs to the technical field of camera shooting. The camera module comprises a module shell, a photosensitive chip, a lens module, a first lens barrel and a first lens, wherein the lens module and the photosensitive chip are oppositely arranged and are both arranged in the module shell, the first lens barrel is movably arranged on the module shell, the first lens is arranged on the first lens barrel, the first lens and the lens module are oppositely arranged, the first lens can move along the optical axis direction of thelens module along with the first lens barrel, the lens module comprises a second lens, and the second lens and the first lens are sequentially arranged in the direction of the optical axis. Accordingto the scheme, the problem that an existing camera module occupies a large space of electronic equipment can be solved.

The invention discloses a camera module and electronic equipment. The camera module comprises: at least one lens; a light sensing assembly used for sensing light passing through the lens; and a driving device which can drive the light sensing assembly to move in the direction close to or away from the lens so as to adjust the focal length of the camera module. The driving device capable of drivingthe light sensing assembly to move is arranged in the camera module, the distance between the light sensing assembly and the lens is changed through movement of the light sensing assembly, and the zooming function of the camera module can be achieved. Since the weight of the light sensing assembly is far less than that of the lens, the requirement on the driving force of the driving device is low. Under the same condition, the moving efficiency of the light sensing assembly is high, and rapid zooming is convenient to achieve. Furthermore, as the lens is immobile, the view field opening of thecamera module can be kept in a small size, the normal imaging requirement can be met, the occupied space in the electronic equipment is small, and the arrangement, design and installation cost of other parts or assemblies is low.

The invention provides an MVB repeater. The MVB repeater comprises a shell and a circuit board card fixed in the shell; the circuit board card comprises two channel circuits, which are redundant with each other and independent; each channel circuit comprises a first MVB signal driving and receiving circuit, a second MVB signal driving and receiving circuit, a power supply conversion module and an FPGA module; the first MVB signal driving and receiving circuit, the second MVB signal driving and receiving circuit and the FPGA module are respectively connected to the power supply conversion module; one end of the first MVB signal driving and receiving circuit is connected with a first segment MVB; the other end of the first MVB signal driving and receiving circuit is connected with one end of the FPGA module; one end of the second MVB signal driving and receiving circuit is connected with the other end of the FPGA module; the other end of the second MVB signal driving and receiving circuit is connected with a second segment MVB; the FPGA module receives an MVB signal from one of the first segment MVB and the second segment MVB; and, after being conditioned, the MVB signal is forwarded to the other one of the first segment MVB and the second segment MVB. The MVB repeater disclosed by the invention has high reliability.

The invention discloses a long-focus module, which comprises a first prism, a first lens unit, a second prism, a second lens unit and a sensing element, wherein the incident parts of the first prism,the first lens unit and the second prism form a first light incident path, the exit part of the second prism, the second lens unit and the sensing element form a second light incident path, and the second prism inverts a propagation path of light, so that the first light incident path and the second light incident path are positioned on the same side of the second prism. According to the invention, through the reverse design of the second prism, the light propagation path is divided into the first light incident path and the second light incident path, and the zoom lenses are respectively arranged on the first light incident path and the second light incident path, so that the problem that the size of the long-focus module is too large due to the zoom requirement is solved. The invention further provides a double-camera module and electronic equipment.

The invention relates to a zooming lens module, which comprises a lens barrel as well as a piezoelectric actuating device, a first lens module and a second lens module contained inside the lens barrel, wherein, the piezoelectric actuating device and the second lens module are fixed on the lens barren in turn; the piezoelectric actuating device comprises a piezoelectric ceramic piece and a slide piece matched with the piezoelectric ceramic piece; the first lens module is fixed on the slide piece; the piezoelectric ceramic piece is used to drive the slide piece to move along an optical axis under the action of voltage, thereby driving the first lens module to move along the optical axis relative to the second lens module. With a simple structure, the invention can effectively reduce the volume of the zooming lens module and lowers manufacturing cost.

The invention relates to an angle amplification parallel mechanism for adjusting attitude of a space object. The angle amplification parallel mechanism consists of a transmission mechanism and a driving mechanism; an upper platform, middle transmission bodies and a lower platform in the transmission mechanism are provided with flexible cable holes; a motor and a decelerator in the driving mechanism are fixed on a mounting plate, and the mounting plate is fixed on a fixed seat; the upper platform, the middle transmission bodies and the lower platform are connected by flexible cables through the flexible cable holes; and the output shaft of the motor is coaxially connected with the input shaft of the decelerator, and the output shaft of the decelerator is connected with the flexible cables. The angle amplification parallel mechanism overcomes the defect of small working space in the prior art. According to the angle amplification parallel mechanism, angle amplification is realized by rolling of multiple middle transmission bodies; and meanwhile, multiple flexible cables are controlled, so that the tail end can reach a random position of the space, namely the upper platform can reach a random position of the space. Because each middle transmission body rolls, the rotating angle of the upper platform can be amplified.

The invention discloses a lens driving structure, which comprises a frame, and a first carrier, a second carrier, a first driving device and a second driving device which are arranged in the frame. The two ends of the front side of the first carrier are movably arranged in the frame through sliding rails respectively, a first driving device is installed at one end of the front side of the first carrier, and the first driving device is connected with and drives the first carrier to move in the frame along the sliding rails. A second carrier and a second driving device are arranged on the rear side of the first carrier, and the second driving device is connected with and drives the second carrier to move on the rear side of the first carrier. The first driving device drives the first carrierand the second carrier to achieve synchronous movement of a second lens installation body and a third lens installation body so as to realize a zooming function, and while the second lens installation body and the third lens installation body move synchronously, the third lens installation body is driven by the second driving device to achieve higher-precision focusing.

The embodiments of the invention provide a zoom lens, a zoom method, a terminal and a computer readable storage medium. The zoom lens includes n lenses; the n lenses are successively arranged in an optical axis direction; n is a positive integer greater than or equal to 2; an aperture is arranged parallel to the n lenses in an optical axis direction; the aperture is arranged at the tail end of theoptical axis and parallel to the n lenses to form an image plane; the n lenses include m variable curvature lenses and n-m aspherical lenses; the top end and bottom end of each variable curvature lens of the m variable curvature lenses are provided with driving parts; m is a positive integer greater than 1 and less than n; by changing the power of the driving parts corresponding to the m variablecurvature lenses, the radiuses of curvature of the m variable curvature lenses are changed, and an incident angle is obtained; and after receiving incident light corresponding to an object space, under the action of a beam of light of the aperture, and through the n lenses, the incident light is reflected to the image plane to be an image at an incident angle.

The invention provides an intelligent terminal and a zooming method based on the same. The zooming method realized by a single camera, comprises the following steps that whether the camera executes ashooting operation and obtains an initial image is determined; when the camera executes the shooting operation, a local area is selected from the initial image; a full-pixel dual-core sensor in the camera carries out double-pixel decoding on the local area; and the double pixel decoded local area is doubled to obtain an image after zooming. A zooming function can be realized by one camera, the cost is reduced, and it is ensured that the sharpness of the image after zooming is the same with that of the original image.

The invention discloses a zooming imaging lens, an imaging module and an iris recognition device. The zooming imaging lens, the imaging module and the iris recognition device belong to the field of biological recognition. The zooming imaging lens comprises a first lens set with a negative focal power and a second lens set with a positive focal power from front to back. The first lens set comprises a first lens with a negative focal power and a second lens with a positive focal power. The second lens comprises a third lens with a positive focal power, a fourth lens with a negative focal power, and a fifth lens with a positive focal power. The first lens, the second lens, the third lens, the fourth lens and the fifth lens are respectively a biconcave lens, a convexoconcave lens, a biconcave lens, a biconcave lens and a convexoconcave lens. The first lens, the second lens and the fifth lens are aspheric lenses. The third lens and the fourth lens are spherical lenses and are adhered together. The distance between the first lens set and the second lens set can be adjusted. The zooming imaging lens has advantages of simple structure, small size, wide zooming range and wide acquisition range. The zooming imaging lens can acquire a high-quality iris image.

The invention relates to a module of outer connection zoom lens that comprises a drawtube, a lens at least and an outer cylinder. The outer cylinder has an inner surface and an outer surface, the lens is mounted on the said inner surface, the drawtube is accommodated movably in the outer cylinder. The invention also provides a kind of portable electric equipment which is equipped with the module of outer connection zoom lens.

The invention discloses a driving structure which comprises a frame, and a carrier assembly and a driving assembly are arranged in the frame. The carrier assembly comprises a first carrier and a second carrier arranged on the first carrier. The driving assembly comprises a first driving device and a second driving device, the first driving device is installed in the frame, the output end of the first driving device is connected with and drives the first carrier, the second driving device is installed on the first carrier, and the second driving device is connected with and drives the second carrier. The combination of a first driving motor and a second driving motor of different types is adopted to replace a traditional continuous zooming motor driving structure, and the focusing precisionis higher.

The invention discloses a charge sensitive pre-amplifier. The charge sensitive pre-amplifier comprises a feedback circuit, a noise reduction circuit, an amplification circuit and a follower circuit, wherein the first end of the feedback circuit receives a detection signal; one end of the noise reduction circuit is connected with the second end of the feedback circuit, and the other end of the noise reduction circuit is connected with one end of the amplification circuit, and the other end of the amplification circuit is connected with the first end of the follower circuit, and the second end of the follower circuit is connected with the third end of the feedback circuit, and the third end of the follower circuit outputs amplified detection signals; the noise reduction circuit can reduce the noise slope of a detection signal; the amplification circuit can amplify the detection signal after noise reduction; the follower circuit can output the amplified detection signal and reduce the impedance of an output signal; and the feedback capacitor can improve the closed-loop gain of the charge sensitive preamplifier. Therefore, by implementing the charge sensitive pre-amplifier, the performance index of the ionization chamber for charge sensitive pre-discharge can be met, and the function of amplifying the output signal of the ionization chamber is realized.

The invention discloses a telescopic zoom lens. The telescopic zoom lens comprises a shell, a mounting channel is formed in the shell, one end of the mounting channel is an object side end, and a first zoom assembly, a second zoom assembly, a focusing assembly and a third zoom assembly are sequentially arranged in the mounting channel from the object side end; the first zoom assembly comprises a first zoom lens cone and a first zoom lens arranged in the first zoom lens cone; the second zoom assembly comprises a second zoom lens cone and a second zoom lens arranged in the second zoom lens cone;the focusing assembly comprises a focusing lens cone and a focusing lens arranged in the focusing lens cone; the first zoom assembly comprises a third zoom lens cone and a third zoom lens arranged inthe third zoom lens cone; and the first zoom lens cone, the second zoom lens cone, the focusing lens cone and the third zoom lens cone are adjustably arranged along the depth direction of the mounting channel. The lens cones can stretch out and draw back, the length of the device is reduced, and a large zoom ratio and a large light inlet flux are guaranteed.

The present invention provides a GPON link amplifier. The GPON link amplifier is arranged in a line between a local side optical line terminal and a client optical network unit, is used to amplify a downlink optical signal and an uplink optical signal which are transmitted in the line, and comprises an optical line local side ONU optical module, an optical line terminal OLT optical module, an uplink burst mode optical detection control module and a data processing unit. The GPON link amplifier provided by the present invention can satisfy the demands of the terminal users in the remote areas greatly, also can save the operation cost for erecting a local side machine room again, thereby reducing the terminal purchase cost and the daily operation cost substantially. The present invention also provides a control method of the GPON link amplifier.

The invention discloses a method for detecting components in liquid, which comprises the flowing steps of adding an aggregation-induced emission compound and a nanochannel membrane into liquid to be detected, enabling the aggregation-induced emission compound to be fully polymerized with the component to be detected in a nanochannel, and obtaining the concentration of the component to be detected according to the change of an electrochemical signal and/or a fluorescence signal of the nanochannel membrane; wherein the nanochannel membrane contains a surface group capable of being combined with the aggregation-induced emission compound or the component to be detected, the aggregation-induced emission compound contains at least two probe groups, and the probe groups are used for being combined with target groups or electronic vacant orbits of the component to be detected. According to the method provided by the invention, the aggregation-induced emission compound is used as a detection probe for the nanochannel membrane, not only is the technical defect that the component to be detected must match with DNA (deoxyribonucleic acid) to amplify the electrochemical signal overcome, but also the change of the fluorescence signal is introduced into the nanochannel membrane detecting technique, so that the detection is more accurate.

The invention discloses an ultra wide band radio frequency amplifier covering fundamental frequency. The ultra wide band radio frequency amplifier comprises an input triplex bias network, an intermediate frequency amplifier, a fundamental frequency amplifier, a high frequency amplifier and an output triplex bias network. Based on the self-biased cascode amplification technology, the RLC negative feedback technology and the same-direction traveling wave high-frequency amplification technology are combined, a three-component synthesis structure is utilized, the ultra-wideband power amplification function covering a fundamental frequency band to a millimeter wave frequency band can be achieved, the gain index and gain flatness are high, and power consumption is low.

According to an X wave band T/R assembly with switchable output power provided by the present invention, a receiving channel and a transmitting channel share a multifunctional chip, the six-phase shift and attenuation functions are achieved, and the amplification function of input signals is achieved; a transmitting channel can provide a large output power path and a small output power path, and the channel selection and switching is conducted through the control signals; a power amplifier is connected with a multifunctional chip and is used for amplifying the output power of the multifunctional chip so as to output an amplified signal with target power; the different amplification channels are selected by the control signal to perform the power amplification, and finally, the output signals with two different powers can be respectively generated; the amplitude-limiting low-noise amplifier chip is used for detecting and amplifying a signal outputted by the ring isolator in the receiving channel; a partition plate and a cover plate are arranged on a box body, and the partition plate is arranged between the driving amplifier and the power amplifier, so that the self-excitation caused by the mutual influence between the power amplifier devices is prevented, and the reliability of the T/R assembly is reduced. The cover plate is used for preventing the signal leakage and guaranteeing the stability of the microwave signals in a cavity.

The invention belongs to the technical field of civil engineering structure reinforcement and transformation construction, and particularly relates to a device for reinforcing a concrete beam through fiber cloth and a construction method thereof. The device comprises a roller frame provided with a pressing roller and adjusting supports, supporting rods are vertically arranged on the two sets of adjusting supports located on the two sides of the roller frame in a guiding fit mode, longitudinal adjusting wheels or limiting pins horizontally extend from the top ends of the supporting rods to the upper surface of the concrete beam, and therefore, the fiber cloth is pressed on the lower surface of the concrete beam through clamping cooperation of the longitudinal adjusting wheels or the limiting pins and the pressing rollers. The device further comprises a longitudinal adjusting assembly capable of enabling the supporting rod to generate vertical adjusting and positioning actions relative to the adjusting support. The device has the advantages of being easy and convenient to operate, high in reinforcing efficiency and good in finished product quality, time and labor are saved, and the actual construction period can be effectively shortened. The invention further provides a construction method applying the device, so that the purpose of on-site rapid construction of the fiber cloth is achieved specifically.

The invention relates to an unmanned aerial vehicle aerial photographing zoom control system. The unmanned aerial vehicle aerial photographing zoom control system comprises a digital camera, a camera control board and a digital transmission module; the digital camera connects with the camera control board through an interface module; and the camera control board connects the digital transmission module. The camera control board comprises a control chip and an optocoupler switch; the control chip connects the optocoupler switch, and the control chip transforms the modulation and demodulation signals sent by the digital transmission module to high and low frequency signals to control the open / close of the optocoupler switch, so as to control the zoom of the digital camera. By means of the unmanned aerial vehicle aerial photographing zoom control system, the digital camera carried by the unmanned aerial vehicle can be controlled to realize the zoom function, therefore, the photographing distance is increased, and the use is wider.