96 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.

The invention provides a collimation device and method for an optical resonant cavity, which can be applied to the technical field of laser. According to the device, a polarization unit adjusts the polarization direction of laser to obtain circularly polarized light; the four-quadrant photoelectric detector collects reflected light obtained after the circularly polarized light is reflected by the first reflector, the second reflector, the optical resonant cavity and the polarization unit for multiple times, and the incident coordinate of the reflected light incident to the four-quadrant photoelectric detector is obtained; the photoelectric tube performs photoelectric conversion on output light after the circularly polarized light sequentially passes through the first reflecting mirror, the second reflecting mirror and the optical resonant cavity to obtain a voltage value; the controller generates a first control signal according to the incident coordinate and a preset coordinate; and according to a plurality of voltage values corresponding to the laser at different frequencies, a second control signal is generated, so that the first reflector rotates under the control of the second control signal, and the incident light incident to the optical resonant cavity is adjusted to coincide with the central axis of the optical resonant cavity.

The present invention provides a collimation device and method for an optical resonator, which can be applied to the field of laser technology. The device includes: a polarization unit for adjusting the polarization direction of the laser to obtain circularly polarized light; a quadrant photodetector for collecting the reflected light obtained after the circularly polarized light is reflected multiple times by a first mirror, a second mirror, an optical resonator and the polarization unit, and obtaining the incident coordinates of the reflected light incident on the quadrant photodetector; a phototube for performing photoelectric conversion on the output light of the circularly polarized light passing through the first mirror, the second mirror and the optical resonator in sequence to obtain a voltage value; a controller for generating a first control signal according to the incident coordinates and a preset coordinate; and generating a second control signal according to a plurality of voltage values corresponding to lasers at different frequencies, so that the first mirror rotates under the control of the second control signal to adjust the incident light incident on the optical resonator to coincide with the central axis of the optical resonator.

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.

Proposed is an X-ray detector including a substrate with a defined display area and a non-display area around the display area, a first electrode provided in the display area on the substrate, a photoconductor layer located on the first electrode and provided in the display area and the non-display area, a second electrode provided on the photoconductor layer, and at least one contact pattern provided in the non-display area and configured to surround the display area, wherein the photoconductor layer is in contact with the at least one contact pattern located therebelow.

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.

The invention relates to the technical field of space environment detection, in particular to a photoelectric sensor for gamma-ray spectrum measurement, which comprises a gamma-ray photon absorption transmission structure, a photoelectric conversion structure and an electric signal output structure, and is characterized in that the gamma-ray photon absorption transmission structure comprises a crystal sealing glass window, a crystal structure assembly and a crystal gland; the photoelectric conversion structure comprises a photoelectric tube first fixing ring, a photoelectric tube assembly, a photoelectric tube second fixing ring and a photoelectric tube gland; the electric signal output structure comprises an electric signal front-end processing board, a supporting column, a mounting base and a signal output lead. The overall structure of the sensor adopts upper, middle and lower three-position connection, so that the assembly precision and reliability of the whole machine are improved; seamless connection between the crystal and the photomultiplier tube is realized through a photoelectric coupling glue potting mode, and multiplication of gamma photon signals and photoelectric conversion efficiency are improved.

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 invention discloses a method for controlling the motor frequency of a feeding quantitative belt matched with an electronic scale. According to the technical scheme, the method comprises the steps that S1, the instantaneous flow of an electronic scale is determined; s2, when the instantaneous flow of the electronic scale in the step S1 is smaller than a set value, the instantaneous flow state of the electronic scale is obtained; s3, recording the duration of the instantaneous flow state of the electronic scale in the step S2; s4, the triggering state of the low-material-level photoelectric tube is determined; s5, recording the time length of the triggering state of the low-material-level photoelectric tube in the step S3; s6, the triggering state of a middle material level photoelectric tube is determined, wherein the triggering state of the middle material level photoelectric tube is triggering; s7, recording the time length of the triggering state of the middle material level photoelectric tube in the step S5; s8, the instantaneous flow state of the materials is determined; and S9, adjusting the motor frequency of the quantitative belt. The method is mainly used for achieving automatic adjustment and control over the frequency of the quantitative belt, finally improving the precision of process control and achieving automatic control over the frequency of the feeding belt motor.

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 relates to a photoelectric signal circuit for detecting air particulate matters, which comprises a photoelectric tube D4 and an operational amplifier U3A, the positive electrode of the photoelectric tube D4 is connected to the in-phase input end of the operational amplifier U3A, the negative electrode of the photoelectric tube D4 is connected to the inverting input end of the operational amplifier U3A, a capacitor C28 and a resistor R26 which are connected in parallel are bridged between the inverting input end and the output end of the operational amplifier U3A, and the capacitor C28 and the resistor R26 are connected in parallel. The output end of the operational amplifier U3A is further connected with a resistor R41 and a capacitor C44 which are connected in series and grounded, a resistor R33 is further externally connected between the positive electrode of the phototube D4 and the in-phase input end of the operational amplifier U3A, a resistor R39 and a capacitor C38 are further connected in parallel, and the resistor R39 and the capacitor C38 are connected in series. And the concentration or the diameter of the particulate matter can be obtained by processing the photoelectric signal.

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 utility model discloses a simple and safe eye-protection starry sky lamp which comprises a main machine, a light source panel, a lamp sheet and a lampshade. The light source panel is arranged on the host and electrically connected with the host, and lamp beads are arranged on the light source panel; the lamp sheet is arranged on the host machine in a removable manner and covers the light source panel; the lampshade is arranged on the main machine in a removable mode and covers the light source panel, and the light source panel is provided with a photoelectric tube used for sensing whether the lamp sheet exists or not. The photoelectric tube is arranged on the light source panel, whether the lamp sheet exists or not can be inducted through the photoelectric tube, when the lamp sheet is inducted, light is strong light, and when the lamp sheet cannot be inducted after the lamp sheet is taken down, the light is switched into weak light, an eye protection mode is achieved, the situation that the strong light directly irradiates the eyes of a user, and consequently vision decline is caused is effectively avoided, and the product is safer to use.

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.

The invention discloses a safety protection system and a safety protection control method for a tobacco shred making material channel, and belongs to the technical field of tobacco machinery, the safety protection system comprises a safety protection device arranged on the periphery of a moving trolley and a track of the moving trolley, the safety protection device is a frame fence net in closed connection, and each face of the frame fence net is provided with a small door; each small door is provided with a proximity switch and a door lock, and the proximity switches are used for detecting the opening and locking states of the door locks; the photoelectric tube and the bar code scanner are arranged at a material receiving port of the moving trolley, and the photoelectric tube is used for detecting the cigarette packets transmitted to the moving trolley in real time and generating cigarette packet detection signals; the bar code scanner is used for detecting the type of the cigarette packet transmitted to the mobile trolley and generating a cigarette packet type signal; and the remote control terminal comprises a control module and is used for receiving the door lock state signal, the cigarette packet detection signal and the cigarette packet type signal and generating a mobile trolley control signal and a door lock control signal in combination with the operation state signal and the production state signal.

The utility model discloses a photoelectric tube test device comprising a pedestal, one side of the top end of the pedestal is provided with a universal meter, the middle position of one side of the top end of the pedestal is fixedly connected with a workbench, the top end of the workbench is provided with a clamping mechanism, the top end of the pedestal is provided with a light shielding shell, and the light shielding shell is provided with a photoelectric tube. A camera is installed on one side of the interior of the shading shell, and a rotating mechanism is arranged in the middle of the top end of the shading shell. The two sets of first through holes are formed in the top end of the shading shell so that external light can irradiate the interior of the shading shell, the multiple sets of second through holes of different sizes are formed in the rotating disc, the second through holes of different specifications in the rotating disc can be aligned with the first through holes by rotating the rotating handle, and the size of the second through holes can be adjusted according to the size of the second through holes. The light intensity in the shading shell can be controlled, so that the photoelectric tube can be tested under different light conditions, and the photoelectric tube can stably work under various environmental conditions.

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.

The invention belongs to the technical field of gyroscopes, and discloses a CPT atomic clock optimal working state point rapid scanning method and a CPT atomic clock.Radio frequency is set to be 0 through a CPT control circuit, and the temperature of a TEC heating sheet is set to be the lowest working temperature; the working temperature of the TEC heating sheet is raised by T, the number of the absorption peaks is detected, the T is halved, the working temperature of the TEC heating sheet is raised by the current T value, the direct current scanning is carried out again, the working temperature of the TEC heating sheet is raised by the current T value, and the direct current scanning is carried out; detecting whether the direct current value of the double absorption peak center is in a preset range about the median of a direct current scanning range, setting the direct current value as the median of the direct current scanning range, performing radio frequency scanning through a CPT control circuit, and determining a frequency domain image of an optical signal received by a phototube; the radio frequency is set at the absorption peak of the frequency domain image of the optical signal, so that the optimal working state of the CPT atomic clock is achieved.