1200 results about "Photoswitch" patented technology

There is provided an optical scanning type photoelectric switch capable of preventing interference with another photoelectric switch by use of its own capability, wherein, as for light projection pulse periods of the first and second optical scanning type photoelectric switches, the period is set to 30 μs in the first optical scanning type photoelectric switch while the period is set to 33 μs in the second optical scanning type photoelectric switch 1B, the light projection pulses have the same pulse width, and by setting the light projection periods different between the first and second optical scanning type photoelectric switches, even if mutual interference occurs between any optical axes, a phase difference of 36 degrees in rotation period is generated therebetween in a next scan, thereby preventing occurrence of the interference in succession in a plurality of times of scanning.

A photoelectric switch reduces a cost load of a user while ensuring its protection function inherent to safety equipment without impairing its safety function, and an optical scanning type photoelectric switch is provided with a muting function settable by the user, which is a function of temporarily invalidating sensing of part or the whole of a protection area, and is provided with two output systems, with respect to each of which the muting function is settable and on each output of which an inspection signal is superimposed at a different timing in a time-division manner.

The invention discloses a garbage can capable of automatic classifying based on visual identification and a classifying method. The garbage can comprises a garbage throwing opening, a first photoelectric switch sensor, an identifying and classifying tray, second photoelectric switch sensors, sub garbage cans, an image identification component, an STM32 controller, a double-path stepping motor driver and a garbage can shell, wherein the garbage throwing opening is formed in the side wall of the garbage can shell; the first photoelectric switch sensor is arranged in the garbage throwing opening;a plurality of sub garbage cans are arranged in the garbage can shell; a second photoelectric switch sensor is mounted in a can opening position of each sub garbage can; the identifying and classifying tray is arranged in the garbage can shell and is located above the sub garbage cans; the identifying and classifying tray comprises a garbage tray, a V-shaped baffle stepping motor, a camera, a V-shaped baffle, a support frame, a rotary baffle stepping motor and a rotary baffle. According to the garbage can, the camera is used for collecting garbage images; a TensorFlow deep learning frameworkis adopted; through transfer training of a model, the accuracy rate of garbage identification is increased.

The invention discloses a kiwi fruit picking end actuator which comprises a clamping mechanism, a rotary picking mechanism, an approaching mechanism, a sensing system and a control system. The clamping mechanism comprises a scissor structure formed by front arc-face finger a rear arc-face finger and is capable of separating and reliable gripping of adjacent fruits. The rotary picking mechanism uses a reduction stepping motor to drive the clamping mechanism to rotate so as to separate stems and fruits. The approaching mechanism drives the front finger to approach the fruits. The sensing system comprises a pressure sensor, an infrared photoelectric switch, a Hall position sensor and a limit switch which are respectively used for detecting a clamping force threshold, fruit positions and mechanism reset information and controlling rotation angle of the reduction stepping motor, wherein the pressure sensor and the infrared photoelectric switch are mounted on the inner side of the front finger, the Hall position sensor and the limit switch are mounted on a frame. The control system comprises a single-chip microcomputer and a stepping motor controller and is used for controlling the whole system by the aid of the sensing system. By the actuator simple in mechanical structure, accurate positioning, separating and reliable gripping of the fruits are achieved, and lossless picking of the fruits is realized.

The invention belongs to the technical field of precision instrument manufacture and measurement and provides a two-dimensional microscale measuring device and method based on double fiber bragg gratings. The device comprises a wideband light source, a spectrum analyzer, an optical circulator, a control computer, a multiplex photoswitch and an external reference grating. The multiplex photoswitch is communicated with a double-fiber-bragg-grating probe through a single mode optical fiber a and a single mode optical fiber b respectively. The upper end of the double-fiber-bragg-grating probe is fixed through a probe clamping device, the single mode optical fiber a and the single mode optical fiber b are connected with the double-fiber-bragg-grating probe to form a channel. The method comprises the following steps that the control computer controls the multipath photoswitch to switch optical paths, the spectrum analyzer is utilized to respectively measure reflectance spectrums of the fiber bragg gratings, and two-dimensional microscale measurement of non-temperature coupling is achieved by utilizing the differential data processing algorithm. The two-dimensional microscale measuring device and method based on the twin-core fiber bragg grating have the advantages of being high in precision, small in contact force and not influenced by the shadowing effect. In addition, the service life of the probe is long.

The invention relates to a measuring device of the noise characteristics of laser, consisting of a conversion system of noise fluctuation of the laser and a detecting and processing system. The measuring device mainly comprises a circulator, a 3*3 coupler, a first photoswitch, a second photoswitch, optical fiber, a first Faraday rotation reflector, a second Faraday rotation reflector, a frequencyshifter, a first photoelectric detector, a second photoelectric detector, a third photoelectric detector, a fourth photoelectric detector, a data acquisition card and a computer. The measuring devicedisclosed by the invention has the capability of simultaneously measuring the noise characteristics comprising the intense noise power spectral density, the phase noise power spectral density, the frequency noise power spectral density, the line width and the Allen variance with frequency instability, of the laser, has the characteristics of high integration level and simpler and more concise structure, has no any limitation to the laser to be measured without an extra active control measure, thereby increasing the measuring reliability of the noise characteristics of the laser.

The invention belongs to the technical field of precision instrument manufacture and measurement and provides a two-dimensional microscale measuring device and method based on a three-core fiber bragg grating. The device comprises a wideband light source, a spectrum analyzer, an optical circulator, a control computer, a multiplex photoswitch and an external reference grating. The multiplex photoswitch is communicated with a three-core optical fiber fan-out device through three single mode optical fibers respectively. One end of the three-core optical fiber is connected to the three-core optical fiber fan-out device, a three-core fiber bragg grating probe is fixedly arranged at the other end of a three-core fiber through a probe clamping device, and the three-core fiber and the three-core fiber bragg grating probe are connected to form a channel. The method comprises the following steps that the control computer controls the multipath photoswitch to switch optical paths, the spectrum analyzer is utilized to respectively measure reflectance spectrums of the fiber bragg grating, and two-dimensional microscale measurement of non-temperature coupling is achieved by utilizing the differential data processing algorithm. The two-dimensional microscale measuring device has the advantages of being high in precision, small in contact force and not influenced by the shadowing effect. In addition, the service life of the probe is long.

The invention belongs to the technical field of precision instrument manufacture and measurement and provides a two-dimensional microscale measuring device and method based on twin-core fiber bragg grating. The device comprises a wideband light source, a spectrum analyzer, an optical circulator, a control computer, a multiplex photoswitch and an external reference grating. Two single mode fibers respectively enable the multiplex photoswitch to be communicated with a double-core fiber fan-out device. One end of a double-core fiber is connected to the double-core fiber fan-out device, the other end of the double-core fiber is fixedly provided with a double-core fiber bragg grating probe through a probe clamping device, and the double-core fiber and the double-core fiber bragg grating probe are connected to form a channel. The method comprises the following steps that the control computer controls the multiplex photoswitch to switch light paths, the spectrum analyzer is utilized to respectively measure reflectance spectrums of the fiber bragg grating, and two-dimensional microscale measurement of non-temperature coupling by utilizing the differential data processing algorithm is achieved. The two-dimensional microscale measuring device and method based on the twin-core fiber bragg grating have the advantages of being high in precision and small in contact force. In addition, the two-dimensional microscale measuring device is not influenced by the shadowing effect, and the service life of the probe is long.

The invention relates to a fiber bragg grating demodulating device and method based on chromatic dispersion Mach-Zehnder interferometry. The fiber bragg grating demodulating device comprises a broadband light source, a narrow-linewidth sweep frequency laser device, a first photoswitch, an optoisolator, a semiconductor optical amplifier, a pulse digital signal source, an optical circulator, a second photoswitch, a reference grating, a sensing grating array, a Faraday rotating mirror, a first optical coupler, dispersion compesation fiber, monomode optical fiber, a second optical coupler, a photoelectric detector set, a data collecting card and an upper computer. The optical fiber dispersion effect and the traditional Mach-Zehnder interferometry are combined to construct chromatic dispersion Mach-Zehnder interferometry, optical path difference caused by the chromatic dispersion effect is used for achieving phase sensibilization, interference information of all gratings in a quasi-distributed fiber bragg grating array is recorded through high-speed time-domain optical pulses, a multi-phase demodulating technology is used for processing time domain interference signals, high-sensitivity and high-speed demodulation of the fiber bragg grating array is achieved, and the demodulating device has the advantages of being high in interference resistance and capable of achieving distributed measurement.

The invention discloses amphipathy photoswitch fluorescent polymer nano particles and a preparing method of the amphipathy photoswitch fluorescent polymer nano particles. Methyl methacrylate, polymerizable green fluorescence dye and a polymerizable photochromic compound are taken as monomers, hexadecane is taken as hydrophobe, a polyoxyethylene macromolecular chain transfer reagent is taken as a surface active agent, a one-step reversible addition-fragmentation chain transfer (RAFT) miniemulsion polymerization method is adopted for preparing the novel amphipathy photoswitch fluorescent polymer nano particles. The amphipathy photoswitch fluorescent polymer nano particles can emit intense macroscopic green or red fluorescence under irradiation of visible light and ultraviolet light, and have fast photoresponse capacity and good repeated fluorescence reversible switch performance. The amphipathy photoswitch fluorescent polymer nano particles have wide application prospects in the fields of cell imaging, bioanalysis, optical storage and the like.

The invention provides a multi-spectrum bill image collecting device based on a CIS and a processing method. The multi-spectrum bill image collecting device at least comprises an infrared sensor, an optoelectronic switch sensor, an optical grating disc, a delivery mechanism, the multi-light-source CIS, an FPGA control circuit, a light source control circuit, a sensor circuit, an A/D converting circuit and a direct current motor. According to the device and the method, under the multi-spectrum condition, the visible light, ultraviolet light, infrared light or combined light initiative light sources are used for illuminating bills to complete image shooting, a computer series port is adopted to select light source schemes, and high-speed, real-time and high-quality image collection, display and storage are achieved. When the multi-spectrum bill image collecting device based on the CIS and the processing method are used, high-quality bill image data under the multi-spectrum condition can be rapidly obtained. The multi-spectrum bill image collecting device based on the CIS and the processing method can be used for true-or-false analysis of the bills, therefore, the high-speed and accurate recognition on the true and false bills can be achieved, and the accuracy, the stability and the real-time performance of a bill recognition system are improved.

The invention discloses a multi-station top-suction type exhaust and dust processing device with a function of automatic station conversion, which comprises a rail arranged on a support of a workshop, and a traveling crane driven by a power mechanism to travel on the rail. A plurality of top-suction type dust hoods corresponding to pollution sources are arranged on the traveling crane, the upper end of each dust hood is communicated with a venting pipe and a controlling valve, the lower end of each dust hood is provided with an exhaust inlet hole, the venting pipe of each dust hood is parallelly connected onto a main air pipe, the main air pipe is communicated with a bag filter system arranged outside the workshop, a photoelectric switch is arranged on the edge of an opening at the lower end of each dust hood, a limit switch which determines the stopping position of the traveling crane is arranged on the rail, and the limit switch, the photoelectric switches, a power mechanism, the controlling valve and a bag filter are all connected with a PLC (programmable logic controller) via cables. The multi-station top-suction type exhaust and dust processing device with the function of automatic station conversion solves the problem that amorphous dust in the workshop with serious dust pollution is difficult to gather and the like, is capable of running stably over a long period of time with enhanced processing effect.

The invention discloses a device and method for measuring atmospheric transmissivity at high precision. The device mainly comprises a laser, an optical fiber switching unit, optical fibers, an optical fiber attenuator, an optical fiber collimator, a pulse generator, a detector unit, a lock-in amplifier and a signal processing unit system. The device is characterized in that all optical functional modules are efficiently coupled by an optical-fiber-based high-speed photoswitch modulation and phase-sensitive detection system through the optical fibers, real-time monitoring of luminous intensity of a light source and single-detector channel detection of a measuring light path and a reference light path are realized, the influence caused by the change of intensity of a light source is eliminated, measurement errors caused by inconsistency of different detectors and amplification circuits on two channels are eliminated, and the measurement precision of the system is greatly improved. The device mainly adopts an optical fiber connection structure and is convenient and simple to install and debug, so that the complex light path debugging is avoided, and the stability, the antijamming capability and the applicability of the system are improved; a weak light signal is extracted by a correlation-theory-based phase-sensitive detection technology, the signal to noise ratio is improved, and the accurate measurement of atmospheric transmissivity on a long-distance base line is realized.

The invention belongs to the technical field of optical communication, and particularly relates to a non-blocking expandable multistage photoswitch array and a working method thereof. The multistage photoswitch array is provided with kN input terminals and kN output terminals, and comprises a packet network with kN input terminals and kN output terminals and a switching network consisting of k N*N non-blocking switching units A. The kN output terminals of the packet network are divided into k output groups. Any one input terminal selected can be connected to the output terminal of any one group of output groups. The N output terminals on each output group are connected with the N input terminals on the switching unit A orderly. The invention has the advantages that a novel network topological structure is put forward, wherein the structure combines the characteristic that mono-stage switching network is simple to control and the advantages of multistage switching network which is low in cost and complexity of hardware. A syncretic topological structure is put forward. The N*N structure is selectively expanded to the kN*kN structure agilely according to the current network traffic. The non-blocking expandable multistage photoswitch array provided by the invention is simple in swapping control and has strict non-blocking characteristics.

The invention relates to an optical fiber illumination system with an optical feedback return circuit, comprising a driving circuit, an optical fiber coupling module which is connected with the driving circuit, an illumination terminal (6), and an optical fiber cable (4) which is connected with the optical fiber coupling module and the illumination terminal (6) and is composed of a plurality of optical fibers (14), the optical fiber illumination system with the optical feedback return circuit also comprises a feedback circuit which is connected with the driving circuit, a collecting card which is connected with the feedback circuit and a photoelectricity detecting module of which one end is connected with the collecting card and the other end is connected with the input end of the optical fiber cable (4), and a photoswitch (5) is arranged between the output end of the optical fiber cable (4) and the illumination terminal (6). Feedback light is generated by the photoswitch and is converted into electric signals through the photoelectricity detecting module and then enters the feedback circuit after being collected by the collecting card, light source power is adjusted by the feedback circuit to realize the adjustment of the illumination terminal. The optical fiber lighting system in the invention has complete photoelectricity separating characteristic and can provide safe and reliable optical fiber illumination in the occasion with specific requirements.

A circuit substrate is divided into a light emitting circuit substrate 60 and a light receiving circuit substrate 70, and they are disposed in a first casing 21 in a two-tier fashion, and the light emitting circuit substrate 60, which is disposed on an upper side, is overlapped with at least a part of an optical system 40. By this means, it is possible to obtain a wider range mounting surface in a small space, and therefore, it is possible to miniaturize a switch main body. In addition, it is possible to miniaturize the switch main body without miniaturizing the optical system 40 more than necessity, simply by changing a disposal configuration of components other than components of the optical system 40 in the switch main body, and therefore, it is possible to prevent lowering of detection accuracy which goes with miniaturization of the optical system 40, and it is possible to detect an object with high accuracy.

The invention relates to a polymer waveguide photoswitch array based on array waveguide grating structure, relating to a single-wavelength polymer waveguide photoswitch array device, where in the waveguide photoswitch array: input end of input plate waveguide is connected with output end of input waveguide, output end of the input plate waveguide is connected with input end of array waveguide grating composed of bending waveguides; the top of the array waveguide grating is equipped with current controlled electrode group, the two ends of the electrode group are connected with current input and output leads to compose temperature controller, input end of output plate waveguide is connected with output end of the array waveguide grating, output end of the output plate waveguide is connected with input end of the output waveguide, and on the condition that signals of the same wavelength are inputted, the device implements function of photoswitch array in the control of different currents. And the device will reduce the size of the routine photoswitch array of cascaded structure and simplify device driver.

The invention discloses a freeze soil area oil and gas pipeline monitoring method and system. The freeze soil area oil and gas pipeline monitoring method includes the steps of conducting monitoring on the temperatures and the moisture around pipelines and the displacement of a tube bodies through temperature sensor sets, moisture sensor sets and fiber bragg grating displacement sensor sets respectively, sending signals obtained through monitoring to a photoswitch (13) through optical cables (12), sending the signals to a lower computer (15) after the signals are demodulated by an interrogator (14), enabling the lower computer (15) to call self-programmed programs, control the photoswitch (13) and the interrogator (14), collect data and preprocess the data, transmitting the preprocessed data to a low-orbit satellite (17) through a satellite communication module (16), receiving the data through the low-orbit satellite (17) and forwarding the data to a satellite communication module (18), transmitting the received data to an upper computer (19) through the satellite communication module (18), analyzing and processing the data through the upper computer (19), and judging the safety condition of the pipelines to conduct damage forecasting. The freeze soil area oil and gas pipeline monitoring method and system are high in precision, high in stability and low in cost.

The invention relates to a safety detection system, which concretely the safety detection system for vehicle chassis, and the system includes that: an image grabbing unit used for grabbing a graph of the vehicle chassis and exporting graph information to an information process unit; a monitoring and control unit used for exporting to detection information, receiving control information and connecting to the information process unit includes a programmable controller, a photoelectric switch and automobile state sensor are connected to the programmable controller, a Jacklight controlled by the control information; a feather collection unit used for collecting automobile mark and/or image information of external appearance and exported to the information process unit; the information process unit used for receiving, processing, storing exported information of the image grabbing unit, the monitoring and control unit and the feather collection unit and exporting the control information. The invention has advantages that the detection system has quick detection and high performance.