75 results about "Phototube" patented technology

The embodiment of the invention provides a rubidium atomic clock based on a velocity grating spectrum and an implementation method, and the method comprises the steps: enabling a multi-frequency coherent laser source to emit a laser signal containing the velocity grating spectrum, and dividing the laser signal into two paths through a polarization splitting prism; the reflected light beam enters the laser frequency stabilization module to realize laser frequency stabilization; a transmission light beam enters the rubidium bubble through the lens group to interact with rubidium atoms; the photoelectric tube detects a transition spectral line, converts the transition spectral line from an optical signal into an electric signal and transmits the electric signal to the lock-in amplifier for demodulation; the integral amplification module converts the demodulated direct-current voltage into linear increasing voltage and transmits the linear increasing voltage to the crystal oscillator; the crystal oscillator generates an initial microwave signal and generates a microwave signal corresponding to the 87Rb atom through the frequency synthesizer; and the phase frequency modulation module modulates the microwave signal to obtain an error signal and transmits the error signal to the microwave resonant cavity so as to adjust the electromagnetic field according to the error signal to stably lock the rubidium atomic clock. The method is used for achieving the effect of improving the stability of the rubidium atomic clock system.

The utility model discloses a constant flow control and material level detection device for tobacco shred conveying. The constant flow control and material level detection device comprises a protective frame, a signal line, a photoelectric tube, an air tube, a positioning strip, a lifting belt conveyor, a hopper, a metering tube and an electronic belt scale. An electronic belt scale is arranged right below the metering tube, a hopper and a lifting belt conveyor are arranged right above the metering tube, a plurality of groups of photoelectric tubes are symmetrically arranged on the left side and the right side of the metering tube respectively and are used for detecting the tobacco shred material level in the metering tube respectively, and signals are sent out through a signal line to control the tobacco shred input time of the lifting belt conveyor to the hopper and the output of the lifting belt conveyor to the electronic belt scale. The high-pressure gas in the gas pipe is sprayed to the photoelectric tube in the protective frame in real time, so that the photoelectric tube is in a clean working environment for a long time, the problems of photoelectric signal distortion and the like are solved, a production line runs stably, the production efficiency is improved, and the maintenance cost is reduced. According to the utility model, the cut tobacco material can be conveyed to the downstream process at a relatively constant flow, the flow fluctuation is reduced to meet the cut tobacco making process requirement, and the cut tobacco making quality is improved.

The invention relates to the technical field of photoelectric tube detection, in particular to a photoelectric tube high-voltage excitation type solar blind ultraviolet discharge detection method and system, and the method comprises the steps: obtaining original voltage sequence data collected by a high-speed transimpedance sampling circuit in real time; positioning feature points of each suspected pulse according to the original voltage sequence data, and extracting pulse waveform features; obtaining a physical confidence factor of each suspected pulse according to the falling edge attenuation characteristics; calculating effective discharge energy flow in unit time based on the physical confidence factor; calculating a discharge stability coefficient according to a coupling relationship between the time correlation entropy and the effective discharge energy flow; according to the method, a scheme from microscopic physical judgment, waveform form deconstruction and time law analysis to multi-dimensional trend prediction is constructed, so that the contradiction between the detection sensitivity and the quantification precision is solved; and adaptive tracking monitoring of the partial discharge process is realized.

This invention provides a phototube cooling mechanism and photoelectric system for tracking slabs in a heating furnace. The phototube cooling mechanism includes a sleeve, a guide tube, a glass plate, a pressure cap, and a cold flow tube. The sleeve has a first end and a second end opposite each other along its own axial direction. The guide tube is fitted inside the sleeve and is flush with the first end. A spiral channel exists between the outer wall of the guide tube and the inner wall of the sleeve. The spiral channel extends through the second end. The glass plate is located at the first end of the sleeve and the end of the guide tube, and is in contact with the space of the spiral channel. The pressure cap is connected to the first end of the sleeve and presses the glass plate tightly against the sleeve and the guide tube. The cold flow tube is disposed on the outer wall of the sleeve near the first end and communicates with the spiral channel. The spiral flow of the cold flow increases the heat exchange time, thereby removing more heat. Therefore, the temperature of the cold flow can be set relatively high, thereby reducing the heat removed from the furnace by the cold flow, thus improving the utilization rate of the furnace and reducing fuel consumption.

This invention relates to the field of steel production quality inspection technology, specifically to a phototube protection device, comprising a protective cover body, a mounting structure, and a light-receiving hole; wherein, the top of the protective cover body is provided with a closed structure; the mounting structure is disposed on the protective cover body for fixing the protective cover body to the bracket of the phototube; the light-receiving hole is opened on the front of the protective cover body, and the opening size of the light-receiving hole is smaller than the detection range of the phototube body to limit the light-receiving range of the phototube, thereby reducing the influence of external light, welding sparks, and other interference factors on the detection signal; the light signal received by the phototube of this invention is constrained to the target area directly in front of the light-receiving hole; thus, the probability of false triggering of the detection signal is reduced, and the detection accuracy of the phototube is improved.

The invention provides a control method for maintaining the cut tobacco conveying flow to be stable and reducing the starting and stopping frequency of equipment. According to the invention, two metering tube control photoelectric tubes are added and are used for controlling the increase and decrease of the operation frequency of front-end equipment, so that the self-adaptive control and matching of the incoming quantity and the demand quantity of materials are realized. According to the invention, a conveying belt motor is changed into a variable frequency motor, and material information fed back by a photoelectric tube is associated with the belt frequency, so that a control method of automatically increasing the frequency when the material is less, automatically reducing the frequency when the material is more and automatically stopping when the material is full is realized, and the material in a metering tube is always maintained at a reasonable level.

The utility model relates to photoelectric device test technical field especially a kind of miniature photoelectric tube ageing seat, including base, upper cover, integrated light source module, multiple elastic probes and locking assembly;The base is opened with heat dissipation groove, test groove and mounting groove, the heat dissipation groove and mounting groove confluence intercommunication, test groove is located at the confluence of heat dissipation groove and mounting groove;The elastic probe is distributed in mounting groove, and its upper end extends to test groove, and lower end is exposed below base;The upper cover left end is hinged with base;Upper cover is vertically opened with through-hole, and integrated light source module is located on upper cover and is positionally corresponding with test groove by through-hole;The locking assembly is located between upper cover and base to lock the closure state of upper cover and base, can satisfy the online light quantity control and test of miniature photoelectric tube by the utility model, improve test precision and reliability.

The invention relates to the field of photoelectric management, in particular to an intelligent photoelectric management system and method based on big data, and the system comprises a target detection module, an image processing module, a mechanical tracking module, a disturbance compensation module and a visual processing module. The image processing module is used for suppressing a sub-peak value and carrying out boundary truncation, the mechanical tracking module is used for continuously tracking a target, the disturbance compensation module is used for compensating disturbance of a target point, and the visual processing module is used for outputting a non-delay motion equation. The performance of the photoelectric tracking system in executing a tracking task is improved, the mechanical disturbance effect is effectively inhibited, high-precision tracking control over a target object is achieved, the self-adaptive capacity of the photoelectric tracking system is improved, and the stability of target tracking and the accuracy of motion data analysis are ensured.

The utility model belongs to the technical field of cigarette packet production, and particularly relates to a device for detecting a small box aluminum-foil paper pulling piece. According to the small box aluminum foil paper pull tab detection device, the outer detection assembly is arranged on the outer side guide plate and can be used for detecting the existence of pull tabs on the outer end face (namely the end face where the pull tabs are located) of a cigarette packet and detecting the defects of the pull tabs, and the inner detection assembly is arranged on the inner side guide plate and can be used for detecting the defects of packaging paper on the outer end face of the cigarette packet. And the comprehensiveness of cigarette packet detection is improved. The high-precision photoelectric tubes are arranged in an angular manner to optimize the layout, so that the installation size is reduced, the detection coverage area is increased, missing detection and false detection are reduced, and the product quality is ensured. According to the installation and adjustment structure of the integrated optical fiber, the change of an original machine is reduced, a detection result can be judged more quickly by using a photoelectric detection waveform, the detection and judgment time is shortened, and the adaptability is wider.

Direct-bonded optoelectronic interconnects for high-density integrated photonics are provided. A combined electrical and optical interconnect enables direct-bonding of fully-processed optoelectronic dies or wafers to wafers with optoelectronic driver circuitry. The photonic devices may be III-V semiconductor devices. Direct-bonding to silicon or silicon-on-insulator (SOI) wafers enables the integration of photonics with high-density CMOS and other microelectronics packages. Each bonding surface has an optical window to be coupled by direct-bonding. Coplanar electrical contacts lie to the outside, or may circumscribe the respective optical windows and are also direct-bonded across the interface using metal-to-metal direct-bonding, without interfering with the optical windows. Direct hybrid bonding can accomplish both optical and electrical bonding in one overall operation, to mass-produce mLED video displays. The adhesive-free dielectric-to-dielectric direct bonding and solder-free metal-to-metal direct bonding creates high-density electrical interconnects on the same bonding interface as the bonded optical interconnect. Known-good-dies may be used, which is not possible conventionally, and photolithography over their top surfaces can scale to high density.

The application discloses a kind of atmospheric particulate matter sampling left and right paper moving device and control method thereof, including sliding plate assembly, sampling body assembly, screw rod assembly, left limit block and right limit block, sliding plate assembly is composed of driving wheel, driven wheel and paper tape shaft, sampling body assembly is composed of sampling pressure head, photoelectric tube, beta source and motor, screw rod assembly is composed of screw rod, screw rod motor, push block and spring guide rail.This application uses straight tube sampling in left and right paper moving for particulate matter sampling, which can effectively reduce the influence of dust accumulation in the tube, and move the detection unit out of the gas path, heating the sample gas to remove moisture, which has no effect on the photoelectricity, and can greatly improve the accuracy of detection. The precise positioning during the paper moving process ensures that the sampling spot is accurately delivered to the detection unit position. In the paper moving process, the spring is compressed to eliminate over-positioning, ensuring that the sliding plate assembly contacts the left and right limit plates for precise positioning.

The application discloses a high-power laser beam inter-delay measurement device, when the relative time delay is measured in a base frequency band, a signal emitted by a clock reference is connected to a first channel of a high-speed oscilloscope in an electrical signal mode, and a pulse output by a main laser system with a high repetition frequency is received by a first photoelectric tube and converted into an electrical pulse and connected to a second channel of the high-speed oscilloscope; when the relative time delay is measured in a three times frequency band, three times frequency analog light is received by a second photoelectric tube after passing through terminal optical elements and converted into an electrical pulse and connected to a third channel of the high-speed oscilloscope. The application measures the time delay by segmenting and dividing wavelengths, and finally accumulates the total delay to determine the time delay of each light beam relative to the reference at a target point. The high-precision measurement of the inter-beam delay can be realized without adding new equipment by using the existing main laser system with a high repetition frequency, three times frequency analog light source and other equipment, the principle and structure are simple, the cost is low, and the engineering implementation is easy.

The utility model relates to an internal arteriovenous fistula monitoring bracelet for a hemodialysis patient. The internal arteriovenous fistula monitoring bracelet comprises a bracelet main body and a bracelet wrist strap, the bracelet main body is composed of a shell, a touch display screen, a power supply, a charging interface, a first photoelectric tube, a second photoelectric tube, a main control circuit board, a temperature monitoring chip and a heat insulation pad; a heat insulation pad is laid on one side, close to the inner side, of the bottom of the shell; a temperature monitoring chip is mounted between the shell and the heat insulation pad; a sensing module is arranged on the first wrist strap; the sensing module is provided with a first laser, a second laser, a third photoelectric tube, a fourth photoelectric tube, a sound sensor, a vibrating diaphragm and a sponge. Scattering light intensity signals generated after laser passes through thrombus are detected in real time through the photoelectric tube, and the internal fistula tremor feeling is monitored in real time through the sound sensor; by adopting a photoacoustic combined detection mode, the reliability of detection is improved, the false alarm rate of internal fistula blockage is reduced, and the device has the advantages of simplicity in operation, portability and accurate diagnosis.

The invention discloses an anti-saturation optical detection circuit, and relates to the technical field of electronic circuits. The circuit comprises a photoelectric conversion unit, a voltage comparison unit, an adjustable reference voltage unit and an output unit. By setting the adjustable threshold voltage, the circuit can effectively distinguish the effective shading signal from the ambient background light, the saturation phenomenon under the strong ambient light is avoided, and a higher reference voltage is set through the adjustable potentiometer. Only when a shielding object enables the phototube to output a strong signal exceeding the threshold value, the comparator turns over, so that tiny voltage fluctuation caused by electromagnetic interference is ignored. According to the utility model, stable and clean digital switching signals are output, and the reliability and the anti-interference capability of optical detection are obviously improved.

The utility model belongs to the technical field of tobacco production equipment, and discloses a metering tube cleaning device and a feeding system. The metering pipe cleaning device comprises a blowing pipe, a gas assembly and a driving assembly, the blowing pipe is arranged in the metering pipe, the metering pipe and the blowing pipe extend in the first direction, and a plurality of small blowing holes are formed in the blowing pipe in the first direction at intervals; the gas assembly comprises a gas pipe and a gas compressor, the gas pipe is communicated with the gas compressor and the blowing pipe, and the gas compressor provides gas into the blowing pipe through the gas pipe and sprays the gas out of the small blowing holes; the driving assembly can drive the injection pipe to move in the metering pipe. The blowing pipe is used for blowing the tobacco leaves in the metering pipe and the blowing pipe can move in the metering pipe, so that the blowing area of the metering pipe is increased, the tobacco leaves are prevented from adsorbing the photoelectric tube, the identification error of the photoelectric tube is avoided, and the production rhythm and efficiency are improved.

The utility model discloses a cleaning device for a photoelectric tube correlation area on a feeding machine, which comprises two cross rods respectively arranged at the upper end and the lower end of an organic glass plate of the feeding machine, a machine rod arranged between the two cross rods along the vertical direction, a sweeping piece arranged on the machine rod and used for cleaning the organic glass plate, and a photoelectric tube arranged on the organic glass plate and used for cleaning the organic glass plate. The two transverse rods are each sleeved with a guide wheel, the guide wheels can slide along the transverse rods so as to drive the machine rod and the transverse sweeping piece to slide, a first air compression guide pipe is arranged on the left sides of the guide wheels on the two transverse rods, and a second air compression guide pipe and the transverse sweeping piece are arranged on the right sides of the guide wheels on the two transverse rods. According to the cleaning device for the correlation area of the photoelectric tube on the feeding machine, the transverse sweeping piece is powered by compressed air provided by the two groups of compressed air guide pipes and reciprocates left and right along with the rod in the horizontal direction, so that an organic glass plate is cleaned, namely, the correlation area of the photoelectric tube is cleaned, and the working efficiency is improved. And the probability of false signals of the photoelectric tube caused by the fact that the organic glass plate is shielded by tobacco dust is greatly reduced.

The invention relates to a retrofit device (100) for a Mode 2 charging cable (30) of an electrically operated vehicle, comprising a unit (10) at least comprising a photocell (12) and an actuator (14). The Mode 2 charging cable (30) has at least one charging current regulator (32) with an operating element (34) for adjusting a charging current of the vehicle. The unit (10) is designed to be arranged on the charging current regulator (32) and to actuate the operating element (34) of the charging current regulator (32) with the actuator (14). The current solar radiation can be determined by means of the photocell (12) of the unit (10). The charging current in the Mode 2 charging cable (30) can be adjusted during intended operation by means of the unit (10) depending on the determined current solar radiation. The invention further relates to a use of a retrofitting device (100).

The invention discloses a biphase magnetic mirror offset frequency laser gyroscope system, and belongs to the technical field of precise laser gyroscopes. The two gyroscopes are arranged in parallel, each gyroscope comprises a gyroscope cavity and an alternating-current phototube assembly which is arranged on the gyroscope cavity and used for outputting demodulation, and the alternating-current phototube assemblies output two A / B signals with the phase difference of 90 degrees; two magnetic mirror offset frequency assemblies; the double-phase magnetic field control circuit is used for controlling the two magnetic mirror offset frequency assemblies to generate an orthogonally changing magnetic field so as to generate an offset frequency effect on light; and the signal demodulation systems are respectively used for receiving four paths of A / B signals from the two alternating-current photoelectric tube assemblies, respectively acquiring steering pulse signals of the two gyroscopes according to the A / B signals, and eliminating a lock region by crosswise splicing the steering pulse signals. According to the invention, the problems of test precision and the like of multiple types of laser gyroscopes are solved, the negative influence of the lock region on the laser gyroscope is reduced, and the accuracy and sensitivity of the laser gyroscope are improved.

This application provides a rubidium atomic clock based on a velocity grating spectrum and its implementation method. The method includes: a multi-frequency coherent laser source emitting a laser signal containing a velocity grating spectrum, which is split into two paths by a polarization beam splitter; the reflected beam is injected into a laser frequency stabilization module to achieve laser frequency stabilization; the transmitted beam is injected into a rubidium bulb through a lens group to interact with rubidium atoms; a phototube detects transition spectral lines, converts the transition spectral lines from optical signals to electrical signals, and transmits them to a lock-in amplifier for demodulation; an integral amplification module converts the demodulated DC voltage into a linearly increasing voltage and transmits it to a crystal oscillator; the crystal oscillator generates an initial microwave signal and generates a frequency synthesizer. 87 The microwave signal corresponding to the Rb atom; the phase-frequency modulation module modulates the microwave signal to obtain an error signal, which is then transmitted to the microwave resonant cavity to adjust the electromagnetic field according to the error signal, thereby stabilizing and locking the rubidium atomic clock. This method is used to improve the stability of the rubidium atomic clock system.

Provided are an EOA circuit, a display panel, and a display device. The EOA circuit comprises a first output module, used for generating a first control signal on the basis of a plurality of reference voltage signals and a plurality of clock signals, the first control signal being used for controlling the working state of the light-emitting element; and an inverting output module, connected to the first output module, and used for performing inverting conversion on the basis of the first control signal to generate a second control signal, the second control signal being used for controlling to disable initialization of the anode of the light-emitting element when the light-emitting element emits light and controlling to enable initialization of the anode of the light-emitting element when the light-emitting element does not emit light.

This invention discloses a storage tank and a method for calculating storage capacity. The storage tank includes a rake roller, a cabinet body, and a bottom belt at the bottom of the cabinet body for conveying tobacco shreds. The rake roller is located at the conveying port of the cabinet body. It also includes a light curtain sensor, a first phototube, and a second phototube mounted on both side walls of the cabinet body. The light curtain sensor is positioned perpendicular to the bottom belt in front of the rake roller and is used to detect the stacking height of the tobacco shreds. The second phototube is located above the conveying surface of the bottom belt and is used to detect the bottom endpoint position of the tailings on the bottom belt. The first phototube is located directly above the second phototube and is used to detect the top endpoint position of the tailings on the bottom belt. The storage capacity calculation method of this invention calculates the remaining tailings based on the sensors mounted on the storage tank, improving the accuracy and stability of the processing data.

1. The name of the design product: UV flame detection module (square type). 2. The use of the design product: using UV photocell for flame detection. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The invention provides a method for automatically recovering a dummy ingot chain in continuous casting, which relates to the technical field of automatic control of continuous casting machines and realizes accurate positioning and automatic control of the dummy ingot chain in a fan-shaped section of a continuous casting machine by integrating detection devices such as a winch encoder, a withdrawal and straightening encoder, a photoelectric sensor and a limit switch through a PLC (Programmable Logic Controller) system. The method specifically comprises the following steps: inserting a dummy ingot chain before casting and checking the state; the position of a dummy bar chain is monitored in real time through an encoder, and winch subsection speed control is triggered according to threshold values of a seventh fan-shaped section and a thirteenth fan-shaped section; a photoelectric tube is used for switching the lifting height and positioning a winch insertion position; and a front hook of a dummy bar vehicle chain hooks the hanging rod to finish traction recovery. A multi-sensor cooperative control, sectional speed regulation and redundancy detection mechanism is adopted, the problems that traditional manual recovery is low in efficiency, large in positioning error and high in manual operation risk are solved, the recovery time is remarkably shortened, the operation rate of a continuous casting machine is improved, and the service life of a dummy ingot chain is prolonged.

The invention relates to a method for optical quality control of a grid of an accumulator cast from lead or a lead alloy, in particular a GroE accumulator, in which the cast grid (9) cooled to room temperature is positioned between a backlit glass pane (4) and a photocell (8), in which the voltage of the photocurrent generated by the photocell (8) by light energy conversion is measured, in which the measured actual voltage is compared with a predefinable target voltage and in which, in the event that the measured actual voltage falls below the predefinable target voltage, the grid (9) is rejected as defective.

The utility model discloses a tobacco bale slice conveying system with a length detection function. The tobacco bale slice conveying system comprises a PLC (Programmable Logic Controller), a correlation photoelectric tube and a speed sensor, the group of correlation photoelectric tubes are arranged on the two sides of a cigarette packet conveying belt at a set position and are used for detecting the conveying duration of a cigarette packet passing through the set position; the speed sensor is arranged on the side edge of the conveying belt and used for detecting the conveying belt speed of the conveying belt. The PLC is in signal connection with the correlation photoelectric tube and the speed sensor, the PLC calculates the corresponding cigarette packet length according to the conveying duration and the conveying belt speed, and reports the cigarette packet length, so that the slicing machine can evenly slice cigarette packets according to the cigarette packet length. The tobacco bale slicing device can improve the consistency of tobacco bale slicing and improve the production efficiency and the product quality.

The invention belongs to the technical field of cigarette cut tobacco production line storage cabinet feeding and material spreading control, and particularly relates to a double-sliding-frame opposite-top-cabinet uniform material spreading system for cigarettes and a control method of the double-sliding-frame opposite-top-cabinet uniform material spreading system. The system comprises a top-to-top cabinet A and a top-to-top cabinet B, a sliding frame A, a sliding frame B, a sliding frame A track, a sliding frame B track, an opposite top cabinet discharging port, a material spreading trolley, a material spreading trolley A end proximity piece, a material spreading trolley B end proximity piece, a sliding frame A left terminal proximity switch, a sliding frame A right terminal proximity switch, a sliding frame B left terminal proximity switch, a sliding frame B right terminal proximity switch, a sliding frame A proximity piece, a sliding frame B proximity piece and a sliding frame A discharging port material detection photoelectric tube are included. And B, a carriage discharge port material detection photoelectric tube. According to the technical scheme, uniform mixing of material formulas in the two cabinets during reciprocating material spreading of the top cabinet is guaranteed, the empty head distance of the two cabinets and the thickness of materials at the tails of the cabinets are consistent, the quality risks of material blocking and material breaking caused by flow fluctuation of material heads and material tails during cabinet discharging are effectively avoided, and the requirements of process quality and continuous production are met.

Optical liquid sensor (1) for detecting liquid (9) for an electrical system (10), comprising - a light source (2) for emitting light, - an optical detector (3) designed as a line detector (3a) with at least two light-sensitive photocells (6) for detecting the light emitted by the light source (2), and - a reflective surface element (5), wherein - the light source (2) and the surface element (5) are arranged such that the emitted light strikes the surface element (5) at an angle, - the light source (2) is designed to emit a parallel beam of light (4), - the light source (2) and the detector (3) are arranged such that the surface element (5) directs the light beam (4) onto the photocell (6), - the surface element (5) is movable in the direction of the surface normal of the surface element (5) and is mounted depending on the amount of liquid (9) present, and - the optical liquid sensor (1) has a beam splitter (12) which is configured to branch off a control beam (7) from the emitted light beam (4) and to direct the control beam (7) to the detector (3) independently of the surface element (5) and / or the liquid (9).

A facility safety method includes establishing, at distinct locations relative to the facility, one or more smart assembly point systems (SAPS), detecting at each SAPS environmental parameters including wind speed, wind direction, ambient temperate and gas of interest presence, determining if a hazardous condition exists based on the detected parameters, alerting personnel of the hazardous condition, said alerting including providing the location of a SAPS at a clean air assembly point, and conducting a personnel headcount at the SAPS at the clean air assembly point. In certain embodiments, a SAPS structure having four backlit sides with transparent lettering that are photocell-activated at night time or conditions of low visibility is used.

The present invention discloses an intelligent transportation system and method for continuous casting slabs, which belongs to the field of intelligent transportation of continuous casting slabs. The system realizes accurate measurement and control of the slab conveying distance through encoders and roller dimensions; adopts photoelectric tubes to measure the slab in-place signal and interlocks control with the track drive system; ensures good centering of the trolley and the center line of the casting strand by the accurate measurement of the distance between multiple distance meters and reference blocks and the formulation of judgment standards; realizes the function of a trolley conveying different casting strands of slabs to different production lines by the forward and reverse rotation of the trolley wheel drive device and the tracking of the trolley travel distance by the encoder; baffles are designed at the top of the slab conveying roller and the top of the trolley roller, and the demand for normal slab conveying is met by the control of the lifting system; the trolley baffle is designed with a position sensor, which can measure the final position of the slab on the trolley, and avoids the situation that the equipment is damaged due to the lateral movement of the trolley when the slab stop position is incorrect.

The invention relates to the technical field of phototubes, in particular to an ultra-high-speed response proximity focusing type phototube and a preparation method thereof, and the phototube comprises a tube shell part and a cathode part which are in indium seal connection with each other; the tube shell component comprises a tube shell structure, an input light window, a getter and a grid mesh structure are sequentially arranged in the tube shell structure in the direction from the light input end to the first indium sealing end, and the tube shell structure is constructed to be formed by overlapping and brazing layered ceramic and a metal electrode ring and at least comprises a getter electrode and a grid mesh fixed electrode. According to the invention, through precise assembly and near focusing structure design, the reflective photoelectric cathode is located on the cathode surface, the distance between the cathode surface and the grid structure is controlled at a submillimeter level, an optical signal enters the cathode surface through the grid, electrons are excited and then are directly emitted to the grid, the electron flight path difference is greatly reduced, and the time consistency is improved; the electron transit time is greatly shortened, the photoelectric response speed is remarkably improved, and the rising time of hundred picoseconds can be achieved.