37results about How to "Reduce experiment preparation time" patented technology

The invention discloses a system for collecting an electroencephalogram signal on the basis of impedance self-adaption. The system comprises an electrode cap, wherein a plurality of electrodes are arranged on the electrode cap and also comprises an impedance detection device for detecting an impedance value of the electrode, and a conductive liquid injection device for supplying conductive liquid to the electrode; the conductive liquid injection device comprises a dosing execution mechanism connected to each electrode and a controller connected with the impedance detection device, and the controller controls the dosing execution mechanism to dose liquid to the electrode of which a real-time impedance value is in a dosing threshold range according to the real-time impedance value of each electrode measured by the impedance detection device. The system has the advantages of being simple to operate and convenient to use; low electrode impedance can be kept for a long time and electroencephalogram data can keep high signal-to-noise ratio and high stability. A method for collecting the electroencephalogram signal on the basis of impedance self-adaption is also disclosed by the invention.

The invention discloses a pitching direction-rotating heliostat model for wind tunnel test, which is composed of a mirror surface reflector plate (1), a rotating device (2), a rotating shaft (3), a vertical prop (4) and a support member (5), wherein all the components are made of organic glass. The mirror surface reflector plate (1) is formed by jointing flat plates (13) and (14), pressure testing holes (12) are uniformly and symmetrically distributed on front and rear surfaces of the mirror surface reflector plate (1) in order to conduct the measurement for wind pressure distribution and pulsation characteristics. The rotating device (2) is composed of a positioning plate (9) and a flange rotating disc (8), a positioning bolt hole of the positioning plate (9) is linked with a scale slot (19) of the flange rotating disc (8) via a positioning screw (7), the positioning screw (7) can freely slide in the scale slot (19) from 0 degree to 90 degrees so as to lead the model to perform the pitching rotation. The support member (5) is manufactured in the detachable form.

The invention relates to a visual engine, and specifically relates to a tracer agent spraying system of visual engine (b.) ( / b)The tracer agent spraying system applied for visual engine test substantially comprises a cylinder cover, wherein a hole is opened in the center of the cylinder cover, a fuel injector is arranged inside the hole, and the fuel injector is able to directly inject fuel inside the cylinder body; a hole is opened in the air inlet channel side of the cylinder cover, a tracer agent spraying valve is arranged in the hole thereof, thus enabling the tracer agent spraying valve to be communicated with the air inlet channel of cylinder cover. The tracer agent spraying system applied for visual engine test uses independent tracer agent spraying system and fuel injecting system, thereby effectively controlling the quantity value of the tracer agent, thus saving the cost, increasing the economical efficiency, and concurrently reducing the unnecessary secondary reaction caused by too much metering; additionally, self-quenching caused by overhigh concentration of fluorescent materials is effectively avoided.

The invention discloses a high-efficiency test tube cleaning machine, which comprises a base, and a support plate is arranged at the upper end of the base, and a column is arranged at the rear end of the support plate, and a lifting platform is arranged on the column, and a driving platform is arranged at the upper end of the column. The screw drive motor of the lifting platform, and at least two cleaning seats are installed on the lifting platform, a rotating motor is installed on the cleaning seats, and a cleaning head is provided at the lower end of the cleaning seat, and a cleaning head is provided at the upper end of the cleaning head for connecting The screw connection pipe of the output shaft of the rotating motor, and the lower end of the cleaning head is socketed with a socket-type brush head. The test tube cleaning machine designed by the present invention replaces the traditional manual cleaning operation of the test tube with an automatic cleaning method, which can effectively reduce the work of the experimenter. The utility model has the advantages of high strength, saving experiment preparation time, reasonable structure design and low manufacturing cost, which can meet the needs of various laboratories and has high practical value.

The invention discloses a freely-falling-body gravity acceleration measurement device based on capacitive sensors. The device includes: an experiment tube column, which is vertically placed to enablea metal detection object to carry out freely-falling movement from a top to a bottom in the experiment tube column; a first capacitive sensor and a second capacitive sensor, which are disposed at different heights of the experiment tube column, are separated with a preset distance, and are used for generating induction signals when the metal detection object respectively falls to the correspondingheights; and a processing module, which is respectively connected with the first capacitive sensor and the second capacitive sensor, and is used for processing the induction signals generated by thefirst capacitive sensor and the second capacitive sensor, respectively obtaining corresponding falling-edge triggering pulse signals, and obtaining a falling time of the metal detection object in thepreset distance according to the falling-edge triggering pulse signals, which correspond to the first capacitive sensor and the second capacitive sensor, to facilitate a process of calculating gravityacceleration according to the preset distance and the falling time.

The invention discloses an aggregate screening, washing and baking integration machine which comprises a motor, a hot air blower, a box body, sieve drawers, a shower head, tracks, a bearing and stirring teeth. The left side face and the right side face of the box body are each provided with four drawer holes. Four tracks are installed below each hole. Four hot air openings are formed in the four walls of the upper portion of the box body. The motor is arranged on the box body. The bearing penetrates through the motor and the box body. The machine can greatly improve the mud removing treatmenteffect on aggregate, tedious links of stone washing, screening and airing of a traditional method are integrated, experiment preparation time is shortened greatly, and with good aggregate gradation, the experiment result is more ideal.

The invention relates to a fan blade lattice tester and a method for changing the flow inlet angle of a fan blade lattice, and mainly belongs to the technical field of pneumatic tests of turbine motors. The tester comprises the fan blade lattice and a testing section at least. The fan blade lattice comprises a fan disc and a blade mounted on the fan disc. A flow channel continuous in surface, smooth and free of wrinkles is arranged in the testing section. At least an upper curved plate or a lower curved plate of the testing section comprises building block units, and the building block units are spliced. According to the method, the airflow inlet angle of the fan blade lattice can be conveniently changed, and the airflow quality can be guaranteed. According to the fan blade lattice testerand the method for changing the flow inlet angle of the fan blade lattice, the flow channel formed by splicing the building block units can provide different flow inlet angles for the downstream fan blade lattice, the flow inlet angle can be adjusted flexibly with a small minute of angle, the material and process cost for manufacturing multiple transition sections is reduced, the test preparationtime is shortened, and the purpose of the fan blade lattice can be expanded.

The invention provides a wearable multi-channel surface electromyogram signal collecting armlet which comprises a signal conditioning module, a signal processing module, a power module and an armlet module. The signal conditioning module is connected with the signal processing module through a flexible circuit board line, namely an FPC line. The signal conditioning module, the signal processing module and the power module are arranged on the armlet module in an integrated mode. The signal conditioning module is used for collecting and processing surface electromyogram signals and transmitting the processed signals to the signal processing module. The signal processing module is used for processing the signals transmitted from the signal conditioning module and transmitting the signals to the signal receiving end. The power module supplies power to the signal conditioning module and the signal processing module. The wearable multi-channel surface electromyogram signal collecting armlet has the advantages of being convenient to wear and miniaturized, and users can walk freely in a communication range and conduct action with a large movement range.

The invention provides an experimental device for researching behavioral characteristics of a bee under electrical stimulation. The device comprises a stimulation chamber which is internally provided with an electrical stimulation unit, a bee escape behavior information acquisition unit and a bee sound information acquisition unit, the electrical stimulation unit comprises a first electrical stimulation area and a second electrical stimulation area, on and off between the first electrical stimulation area or the second electrical stimulation area and a power supply are controlled through a main controller, the bee escape behavior information acquisition unit and the bee sound information acquisition unit are both connected with the main controller, and the main controller determines which area is energized according to the current position of the bee. According to the experimental device for researching the behavioral characteristics of the bee under the electrical stimulation, escape behaviors and sound behaviors of the bee under the electrical stimulation are researched, pretreatment does not need to be conducted on a subject bee before the experiment, the procedure is simplified, harm caused by pretreatment to the subject bee is avoided, and the experimental results are more reliable. Automatic control is adopted in the whole experimental process, and the influences of human operation errors and human disturbance on bee behaviors on the experimental results are avoided.

The invention discloses an oil injector for parameter test in a cylinder of a diesel engine and a machining method thereof. A lead channel can be provided for a cylinder parameter test sensor under the condition that oil is injected into an engine cylinder normally, and the lead channel is formed by combining three sections of through holes in a needle valve body, a transition block and an oil injector body. A modified part comprises the oil injector body, the transition block and the needle valve body, and channels for a sensor or a lead to pass through are arranged on the corresponding positions of the oil injector body, the transition block and the needle valve body in a machined mode, so that a sensor lead can be introduced out of an oil injector assembly from the head of the needle valve body, a through hole of the needle valve body, a through hole of the transition block, and a through hole of the oil injector body. By the adoption of the structure, the lead channel can be provided for the tests such as the temperature of the ball head part of the injector needle valve body when the engine works, the gas temperature in the air cylinder, and the gas pressure in the air cylinder. The internal lead of the oil injector is adopted, so that any change to other parts of the engine is made, and one oil injector for test can be used for multiple times.

The invention discloses a novel centring device for engine simulation experiment, which belongs to the field of detection fixtures for automobile parts. The novel centring device comprises a circular fixing plate, a steel tube, a detection needle and a slide sleeve, wherein a thread guide sleeve is fixed at the middle of the circular fixing plate, an external thread is engraved at the left end of the steel tube, a detection needle fixing rod is fixed at the right end of the steel tube along a radial direction, and the detection needle fixing rod is of a cuboid structure; the slide sleeve is of a rectangular-ambulatory-plane structure and in slide fit connection with the detection needle fixing rod; the detection needle is of a Z-shaped structure, and the tail portion of the detection needle is vertically and fixedly connected with the slide sleeve; the external thread at the left end of the steel tube is matched with the internal thread of the thread guide sleeve. The detection radius of the novel centring device disclosed by the invention is capable of being continuously adjusted according to the side of the flywheel of the detected engine; the novel centring device is reasonable in structural design, low in production cost and good in adaptability; experiment preparation time is reduced, and detection efficiency is increased.

The invention relates to an automatic assembling system for a laboratory pipette head. The automatic assembling system for the laboratory pipette head comprises a control box, a conveying device, transmission railways, a material collecting device and a collecting device; the control box is used for providing power for the conveying device; the conveying device comprises a first conveying area anda second conveying area; the first conveying area is in smooth abutting joint with the second conveying area; the material collecting device communicates with one end of the first conveying area; thetransmission railways are arranged on the conveying device to limit side-by-side conveying of pipette heads; the collecting device comprises a pipette head box with guide rail grooves, a cover plateand side inserting plates; the pipette head box is placed at the tail end of the second conveying area; the guide rail grooves are railways with chutes and can be in smooth abutting joint with the transmission railways; the cover plate is detachably connected with the pipette head box; the side inserting plates are be inserted and connected through side holes in a side surface of the pipette headbox; and a high-temperature sterilizing box is also arranged on one side of the tail end of the second conveying area. The automatic assembling system for the laboratory pipette head has the advantages of simple structure and high flexibility, can be assembled to use, and can also perform a high-temperature sterilizing operation simultaneously.

The present invention relates to a circular hero of an Alexandria fountain demonstration instrument, and to the field of the teaching instrument device technology. The instrument comprises a dual-column support, a water tank is arranged between the columns of the dual-column support, a fountain is arranged at the upper portion of the water tank, and two water supply pipelines are fixedly arranged at the lower portion of the fountain; the water tank includes a first air duct pipeline, a second air duct pipeline, a first water storage cavity and a second water storage cavity, hollow first rotating shaft and second rotating shaft are arranged at two sides of the water tank, and the first and second rotating shafts are concentrically arranged and allow the water tank to rotatingly connect with the columns; the first water storage cavity is provided with a first water duct port, the second water storage cavity is provided with a second water duct port, one ends of the first rotating shaft and the second rotating shaft are respectively connected with the first water duct port and the second duct port, and the other ends of the first rotating shaft and the second rotating shaft are connected with the nozzle pool through the water supply pipeline; and the first air duct pipeline is connected with the first water storage cavity and the second water storage cavity, the second air duct pipeline is connected with the first water storage cavity and the second water storage cavity, and the first air duct pipeline and the second air duct pipeline are both provided with control valves.

The invention provides a concrete slump integrated test device, which belongs to the technical field of test devices, and solves the technical problems that an existing concrete slump test device is not convenient and accurate enough to use and the like. The test device comprises a bottom plate, a scale plate and a fixing plate are vertically and fixedly arranged on the bottom plate, the bottom plate, the scale plate and the fixing plate are perpendicular to one another in pairs, and a flat test area is arranged in the area, defined by the scale plate and the fixing plate, of the bottom plate;a laser emitter capable of emitting a straight line is fixedly arranged at the position, right opposite to the scale plate, of the bottom plate, and a slump cone is placed in a test area of the bottom plate and located between the scale plate and the laser emitter; the slump cone is of a double-layer structure, and a heating wire is arranged between double layers; scale values are arranged on theside surface, facing the test area, of the scale plate; a connecting rod capable of lifting and horizontally moving is arranged on the fixing plate; one end of the connecting rod can be inserted intothe slump cone. The concrete slump integrated test device is accurate and reliable in test data and convenient to use.

The invention relates to an automatic calibration method for X-ray grating-based phase-contrast imaging. The automatic calibration method comprises the following steps: moving a sample stage to allow the sample stage not to be located on an optical path; allowing X-rays emitted by an X-ray source to form a stripe image on a detector; carrying out analysis so as to obtain the parameters of the stripe image; determining whether the parameters of the stripe image are matched with the parameters of a first standard image; if matching is succeeded, moving the sample stage back to the optical path and placing a sample onto the sample stage; allowing X-rays emitted by the X-ray source to form a shadow image on the detector; carrying out analysis so as to obtain the parameters of the shadow image; determining whether the parameters of the shadow image are matched with the parameters of a second standard image; and if matching is succeeded, accomplishing automatic calibration. The invention also relates to an automatic calibration system for X-ray grating-based phase-contrast imaging. The automatic calibration system and method for X-ray grating-based phase-contrast imaging in the invention can accomplish automatic calibration of grating-based phase-contrast imaging, reduces the workload of manual adjustment, improves experimental efficiency and lowers errors caused by human eyes.

The invention discloses a locking mechanism for an automobile wind tunnel balance strut. The locking mechanism comprises a fixing sleeve which is provided with a base fixedly connected with the fixingsleeve; a piston which is arranged inside the fixing sleeve and provided with a locking sleeve fixedly connected with the piston, wherein the locking sleeve is internally provided with a guide groove; a spring which is arranged between the piston and the base; a compressed gas passage which is arranged on the fixing sleeve, wherein the piston can move relative to the fixing sleeve under the pushof the compressed gas; and a spherical calliper which is provided with a fixing pin fixedly connected spherical calliper, wherein the spherical calliper swings around the swing shaft fixed on the base, and the fixing pin is guided in the guide groove. When the compressed gas is loaded through the compressed gas passage, the piston drives the fixing pin through the guide groove of the locking sleeve, and the spherical caliper swings around the swing shaft to enter the unlocked state. When the compressed gas is unloaded through the compressed gas passage, the piston drives the fixing pin throughthe guide groove of the locking sleeve, and the spherical caliper swings around the swing shaft to enter the locked state.

The invention relates to the technical field of experimental equipment, and discloses a test tube placement rack for chemical experiments, which includes a base in which a storage battery is fixedly installed by bolts, and at least two independently working button switches electrically connected to the storage battery are fixedly installed on the base , the upper part of the base is fixed with a lower matching seat through bolts, and the upper part of the lower matching seat is installed with an upper matching seat through a bearing. The test tube placement rack designed by the present invention can effectively place, clean and dry the test tubes according to the use needs of the test tubes, thereby effectively facilitating the maintenance of the test tubes, reducing the physical consumption of the experimental operators, and can It is convenient for experiment operators to mark and select test tubes, saves experiment preparation time, improves experiment efficiency, and has high practical value.

The invention discloses a gravity acceleration measurement instrument based on a free falling body method, which comprises an experiment pipe column, a first permanent magnet, a second permanent magnet, a first magnetic sensor, a second magnetic sensor and a processing module, wherein the experiment pipe column is vertically placed; the first permanent magnet and the second permanent magnet are arranged at different heights of the experiment pipe column and separated by a preset distance; the first magnetic sensor is arranged between the first permanent magnet and the pipe wall of the experiment pipe column; the second magnetic sensor is arranged between the second permanent magnet and the pipe wall of the experiment pipe column; the first magnetic sensor and the second magnetic sensor generate sensing signals when a metal detected object respectively falls to the corresponding heights; the processing module is respectively connected with the first magnetic sensor and the second magnetic sensor and is used for carrying out processing on the sensing signals generated by the first magnetic sensor and the second magnetic sensor, respectively obtaining corresponding falling edge trigger pulse signals and acquiring falling time of the metal detected object within the preset distance according to the falling edge trigger pulse signals corresponding to the first magnetic sensor and the second magnetic sensor so as to calculate a gravity acceleration according to the preset distance and the falling time.

The invention discloses a rapid pipettor tip boxing device for a laboratory, which is characterized by comprising a tip positioning device, the outer side of the tip positioning device is connected with a baffle bottom bracket, and a baffle is arranged on the baffle bottom bracket; the gun head positioning device is composed of a plurality of sets of metal sheets, each set of metal sheets is composed of two rotatable metal sheets, the two metal sheets are connected through a middle shaft, the end of the middle shaft is connected with a support at the bottom of the baffle, and a plurality of grooves are distributed in each metal sheet; gun head holes corresponding to the gun heads are formed by the grooves of any two adjacent and different groups of metal sheets; a boxing control rod for controlling the opening and closing of the two adjacent and different groups of metal sheets is arranged on the bracket at the bottom of the baffle. By means of the rapid boxing device for the pipettorgun heads, the gun heads can be boxed at a time, operation is easy and convenient, the structure is exquisite, and therefore the experiment preparation time is saved, the scientific research expenditure is saved, and the experiment efficiency is improved.

The invention relates to an automatic calibration method for X-ray grating phase-contrast imaging, comprising: moving a sample stage so that the sample stage is not on the optical path; X-rays emitted by an X-ray source form a fringe image on a detector; analyzing and obtaining the parameters of the fringe image ; Judging whether the parameters of the fringe image match the parameters of the first standard image; if the match is successful, the sample stage is moved back to the optical path, and the sample is placed on the sample stage; forming a shadow image; analyzing the parameters of the shadow image; judging whether the parameters of the shadow image match the parameters of the second standard image; if the matching is successful, then completing the automatic calibration. The invention also relates to an automatic calibration system for X-ray grating phase contrast imaging. The invention can complete the automatic calibration of the grating phase contrast, reduce the workload of manual adjustment, improve the experimental efficiency and reduce the error of human eyes.

The invention provides an opening and closing dual-purpose low-speed return flow tunnel. An experimental section is divided into a bottom plate and an upper cover; the bottom plate is fixedly arrangedon the ground, and the upper cover and the bottom plate are in buckling fit to form the experimental section; the upper cover can move on the bottom plate through a sliding rail, and the experimentalsection and a contraction section are in inserting fit through an inserting ring and a butting ring; a pressure balance gap is reserved between the experimental section and a diffusion section; the top, adjacent to the inserting ring, of the upper cover and the top, adjacent to the butting joint, of the contraction section are each provided with an electromagnet mechanism, and the two electromagnet mechanisms are arranged in a directly-facing mode, are matched with each other, and can output homopolar repulsion or heteropole attraction electromagnetic force; four gas collecting plates are arranged on the periphery of a hole in the gas inlet end of the diffusion section, the gas collecting plates located at the top, the front end and the rear end of the hole are connected with the hole inthe gas inlet end of the diffusion section through hinges, the gas collecting plate located at the bottom end of the hole is fixedly connected, and the four gas collecting plates form a complete gas collecting hood when being in a spliced mode; and a portal crane is erected above the experimental section, a lifting ring is mounted at the top of the upper cover of the experimental section, and theupper cover is hoisted and transferred through the portal crane.

The present invention relates to a circular hero of an Alexandria fountain demonstration instrument, and to the field of the teaching instrument device technology. The instrument comprises a dual-column support, a water tank is arranged between the columns of the dual-column support, a fountain is arranged at the upper portion of the water tank, and two water supply pipelines are fixedly arranged at the lower portion of the fountain; the water tank includes a first air duct pipeline, a second air duct pipeline, a first water storage cavity and a second water storage cavity, hollow first rotating shaft and second rotating shaft are arranged at two sides of the water tank, and the first and second rotating shafts are concentrically arranged and allow the water tank to rotatingly connect with the columns; the first water storage cavity is provided with a first water duct port, the second water storage cavity is provided with a second water duct port, one ends of the first rotating shaft and the second rotating shaft are respectively connected with the first water duct port and the second duct port, and the other ends of the first rotating shaft and the second rotating shaft are connected with the nozzle pool through the water supply pipeline; and the first air duct pipeline is connected with the first water storage cavity and the second water storage cavity, the second air duct pipeline is connected with the first water storage cavity and the second water storage cavity, and the first air duct pipeline and the second air duct pipeline are both provided with control valves.

The invention discloses a freely-falling-body gravity acceleration measurement device based on capacitive sensors. The device includes: an experiment tube column, which is vertically placed to enablea metal detection object to carry out freely-falling movement from a top to a bottom in the experiment tube column; a first capacitive sensor and a second capacitive sensor, which are disposed at different heights of the experiment tube column, are separated with a preset distance, and are used for generating induction signals when the metal detection object respectively falls to the correspondingheights; and a processing module, which is respectively connected with the first capacitive sensor and the second capacitive sensor, and is used for processing the induction signals generated by thefirst capacitive sensor and the second capacitive sensor, respectively obtaining corresponding falling-edge triggering pulse signals, and obtaining a falling time of the metal detection object in thepreset distance according to the falling-edge triggering pulse signals, which correspond to the first capacitive sensor and the second capacitive sensor, to facilitate a process of calculating gravityacceleration according to the preset distance and the falling time.

The invention discloses an intelligent testing device for a high-temperature superconducting terahertz radiation source based on different bias conditions, which includes a test bench. A sealed shell is fixedly installed on the left side of the upper surface of the platform, and the low-temperature refrigeration system includes a Stirling refrigerator. A cooling chamber is installed at the output end of the Stirling refrigerator, and a liquid nitrogen cooling tank is installed on the right side of the cooling chamber. An intelligent testing device for a high-temperature superconducting terahertz radiation source based on different bias conditions according to the present invention is used in conjunction with an improved Stirling refrigerator and a liquid nitrogen cooling tank, and the radiation source is installed on the ground through a copper support Inside the cooling chamber of the Stirling refrigerator, the computer controls the liquid nitrogen flow switch of the liquid nitrogen cooling tank through the temperature controller made by the laboratory to control the flow of liquid nitrogen and the cooling efficiency of the Stirling refrigerator, and accurately control the cooling chamber internal temperature.

The invention provides multi-angle loose accumulation bank slope model making equipment and a test method thereof. The model making device includes a model box body. The whole body of the mold box is a hollow straight triangular prism with an open side. During work, soil is filled in the inner cavity of the model box body, and loose accumulation soil blocks are formed after slope cutting and leveling work. The test method includes steps such as fixing the soil baffle, pre-determining the height of layers and the height of loose paving, filling the soil in layers and partitions, and cutting and leveling the slope. By arranging soil baffles at intervals, the device can realize the experimental research of multiple soil blocks of different materials at the same time. Through the combination of fixed baffles and detachable baffles, multiple angles can be easily changed without repeating time-consuming and laborious processes such as concrete masonry and edge trimming, which greatly shortens the experimental preparation time and simplifies the experimental procedures.