41results about How to "Make an impact" patented technology

The invention relates to an online detection electric-loading test bed for a car hand-gear gearbox and an operating method thereof. The test bed comprises a test bed main body and a motor case body, an electric driving control system, a computer measurement and control system, and an oil supply system, and is characterized in that a clutch unit is connected behind a torque revolution speed transducer of the test bed, a tray sliding table is arranged under a tested gearbox, and the tested gearbox has a structure with two output shafts. The test bed and the operating method thereof have the following advantages: conductively closed power feedback loading is adopted for saving energy sources; an input shaft driving motor and an output shaft driving motor of the tested gearbox on the test bed are the power input and the power output of each other; and under the state of seamless smooth conversion electric driving and regenerative power generation, the four-quadrant work is realized; a structure that motors are separated from a machine tool main body is adopted, and the motors are arranged in an independent case body; the test bed is applicable to the tests of various models of hand-operated and automatic gearboxes; an industrial control computer system and a measurement and control instrument are adopted to realize the automatic control for test procedures; the test bed has perfect interlocking protection function; and a quantitative oil feeding and discharging system is adopted.

The invention relates to the field of video processing and discloses a de-interlacing method and a de-interlacing device for interpolating pixel points. The method and the device perform edge detection, select points for participating in median filtering in the direction of a detected edge and make the margin of an inclined edge more clear on the premise of ensuring high capability of saw-teeth elimination and have the capability of inhibiting noises and high stability. Through motion detection, a static point to be inserted is directly, accurately and simply predicated according to a pixel value of a contiguous field at the position of the point to be inserted.

The invention discloses a container formation process for a lead-acid battery. The process generally comprises the following steps: 1, adaptation and activation in an early stage; 2, continuous and steady container formation; 3, discharging and buffering; 4, deep container formation; 5, electrolyte supplementing; and 6, adjustment on the consistency of the electrolyte in the battery. By utilizing the process, the time for container formation can be effectively saved; meanwhile, because the design of the process completely meets the reaction rule of a counter electrode and the electrolyte, the process has the advantages of short formation time, less power consumption and the like; and the lead-acid battery subjected to formation has the advantage of longer service life.

The invention provides an integrated detection method for separating, enriching and detecting an exosome. The method comprises the following steps: designing and assembling a dual-membrane filtration chip, constructing an ELISA detection standard curve, collecting a sample, injecting and washing, performing chip ELISA detection, and performing data processing analysis. The invention also provides an integrated detection chip for separating, enriching and detecting a urine exosome. A reaction system and the detection method of the present invention can be used for detecting the content of a urine sample of a bladder cancer patient and the exosome in a supernatant of a bladder cancer cell line nutrient solution. The detection chip has characteristic of high specificity, generates no influence or wound on human body, and the detection method does not require the expensive precision experiment apparatus (such as an ultra centrifuge and a fluorescence microscope), and has large application prospect.

The invention discloses a method and a device for supporting MBMS business content synchronization based on an integrated EPS. The method comprises the following steps: after a BM-SC (Broadcast Multicast Service Center) receives MBMS user data, writing in the time stamp of the MBMS user data sent by an original empty port and a differential time stamp which corresponds to multi-hop time delay through which an access gateway and terminal access point equipment pass into the synchronous protocol encapsulation data header of the MBMS user data; sending the MBMS user data with synchronous protocol encapsulation to the access gateway; after the access gateway receives the MBMS user data, working out the time for sending the MBMS user data to the empty port according to the original time stamp of the MBMS user data sent by the empty port and the differential time stamp which corresponds to the multi-hop time delay, which are carried in the MBMS user data, to complete the encapsulation of the MBMS user data; and sending the MBMS user data to the empty port at the worked out time. The invention enables the MBMS user business data to be transmitted in a WLAN (Wireless Local Area Network) network, simultaneously ensures the content synchronization of the MBMS user business data and can not cause additional changes and influences on the original content synchronization scheme in the network.

The invention discloses a method for assisting production of woodwork furniture by using RFID chips. The method comprises the following steps: firstly modeling the furniture according to a ratio of 1 to 1 through computer-aided designing and manufacturing software of woodwork, in wherein each plate of the furniture in the model has own unique identification code; synchronously printing a label of each plate by equipment during cutting in a production workshop, marking the identification code of the plate on the label, then forming holes in the plates by using gang drill equipment or forming slots in the plates through manners such as sawing and milling in the next process, putting carriers with RFID labels into the holes or the slots, putting a suspension sensor at a feeding end of each process, automatically reading RFID identification codes when the plates pass through the suspension sensors, reading corresponding data and drawings generated by WCC by using production process control software, and assisting manual production. The method is applicable to various complex production environments; the influence on the chips caused by hot pressing, sanding and spraying paint can be avoided.

The invention discloses a protective sleeve for cleaning agent remote transportation. The protective sleeve comprises a base, a sleeve shell and a tank port fixed piece; the top of the base is fixed with the sleeve shell through a clamping ring; the tank port fixed piece is mounted at the top of the sleeve shell; a reinforcing layer is arranged on the inner side of the sleeve shell; a buffer cavity is formed in the inner side of the reinforcing layer; a buffer piece is arranged in the buffer cavity; an inner sleeve is arranged on one side, far from the sleeve shell, of the buffer cavity; a protecting layer 1 is arranged on the inner side of the inner sleeve; a cleaning agent loading tank is arranged on the inner side of the protecting layer 1; a bottom cushion plate is arranged at the bottom of the cleaning agent loading tank; and vibration reducing springs are uniformly distributed in the buffer cavity. Through the protecting layer 1 and a protecting layer 2 matched with each other and the vibration reducing springs arranged at the bottom of the bottom cushion plate, the protective sleeve achieves the effects of buffering, vibration reduction and deformation resistance on the cleaning agent loading tank.

The invention discloses phthalate degrading bacteria and an application thereof, and relates to a microorganism capable of degrading phthalate and an application of the microorganism. A bacterial strain is an arthrobacter scleromae C21 and is collected in China General Microbiological Culture Collection Center (CGMCC), and the collection number is CGMCC No.7671. The application of the phthalate degrading bacteria in phthalate degradation can be used in the field of environment modification.

The embodiment of the invention discloses an article duplicate checking detection method and device, equipment and a storage medium. The duplicate checking detection method for the article comprises the steps of conducting semantic analysis on the article to be subjected to duplicate checking, and determining at least one key sentence set corresponding to the article to be subjected to duplicate checking; obtaining at least one key description feature corresponding to the at least one reference article; and respectively matching each key sentence set of the to-be-duplicated article with each key description feature of each reference article, and determining key feature similarity between the to-be-duplicated article and each reference article according to a matching result so as to carry out duplicate checking detection on the to-be-duplicated article. According to the technical scheme of the embodiment of the invention, the core viewpoint in the to-be-duplicated article is matched with the core viewpoint of the reference article, so that the influence on the duplicate checking detection result due to synonym replacement or article content sequence change is avoided, and the duplicate checking detection accuracy of the article is improved.

The invention relates to a table tennis serving device, in particular to a table tennis serving device for sports table tennis training. For solving the technical problem, the table tennis serving device for sports table tennis training is provided; and the table tennis serving device is capable of automatically and rapidly converting a table tennis serving direction and limiting the position of atable tennis ball. According to the technical scheme, the table tennis serving device for sports table tennis training comprises a supporting seat, a rotating device, a funnel, a ball outlet pipe, afirst support, a first guide rod, a first spring, a push block, an N-shaped guide rod, a second spring, a first roller and the like; the rotating device is arranged at the upper part of the supportingseat; the funnel is arranged in the rotating device; the ball outlet pipe is arranged at the bottom of the funnel; the first support is arranged at the left end of the ball outlet pipe; and the firstguide hole is formed in the upper part of the first support. According to the table tennis serving device for sports table tennis training, a sector gear and a first gear are arranged for driving theball outlet pipe to swing forwards and backwards; the table tennis serving direction can be automatically converted; and the direction of the table tennis ball sent out by the ball outlet pipe can bechanged continuously, so that the response capacity and the strain capacity of people can be improved, and the training level can be improved.

Provided is a slide fastener whereby waterproof properties near a bottom stop can be enhanced in cost-effective manner. A slide fastener (1) having a waterproof structure comprises a left-right pair of fastener stringers (2) each having a plurality of fastener elements (3) arranged in a row along an opposing edge (11) of each of a left-right pair of waterproof fastener tapes (10), a slider (7) for engaging and disengaging the left and right fastener elements (3) with each other, and a bottom stop (4) formed at the bottom end of the rows of fastener elements (3) so as to straddle the left and right fastener tapes (10). Each fastener element (3) includes an engaging head part (30), a base part (33), a neck part (32), and a shoulder part (34), and the bottom stop (4) covers a first fastener element (3a) near the lowermost end except for an upper portion of an engaging head part (30a) of the first fastener element, and covers a lower portion of a base part (33b) of a second fastener element (3b) that is above and adjacent to the first fastener element (3a). In the bottom stop (4), a recess (40) is provided that is downwardly indented at the top of the bottom stop. The upper portion of the engaging head part (30a) of the first fastener element (3a), and the lower portions of the neck part (32b) and the engaging head part (30b) of the second fastener element (3b) are disposed in the recess (40). A linking part (41) between the first and second fastener elements (3a, 3b) may be provided in the recess (40).

The invention discloses an anti-collision safety early warning system for an elevator landing door. The system comprises a mounting rack which is arranged on the front side of the landing door, the mounting rack is composed of a top rod, a left-side rod and a right-side rod, the top rod is provided with a landing door opening detection device used for detecting whether the elevator landing door isopened or not, and the opposite positions of the left-side rod and the right-side rod are provided with article existence and absence detection device used for detecting whether an article exist in front of the landing door or not; the system further comprises a control module and an alarm lamp, the landing door opening detection device, the article existence and absence detection device and thealarm lamp are connected with the control module correspondingly. According to the system, the signal is more accurate, the situation that a person easily triggers the system to cause false alarm whenthe person walks in a passageway can be avoided to the maximum degree, moreover, the influence caused by the temperature of a detected article and the temperature of the ambient environment is avoided, meanwhile, an active anti-collision intercepting device is installed, the impact risk is reduced to the largest extent through active intercepting, moreover, the system is completely independent and makes no contact with the control system of an elevator, so that no influence is caused to the elevator.

The invention discloses an old bridge floor drainage emergency transformation system and a bridge, and relates to the technical field of municipal bridge engineering. The system comprises a vertical drainage pipe, a longitudinal drainage pipe, a hazardous chemical substance identification sensor and an emergency pipeline, an inlet of the longitudinal drainage pipe is connected with an outlet of the vertical drainage pipe, the hazardous chemical substance identification sensor is arranged at an outlet of the longitudinal drainage pipe and is used for making a hazardous chemical substance alarm when recognizing that hazardous chemical substances exists in the passing rainwater, and the emergency pipeline comprises an emergency pipeline body and a first control switch; when the first control switch receives the hazardous chemical substance alarm, the first control switch is in an open state, otherwise, the first control switch is in a closed state, and a non-emergency pipeline comprises a non-emergency pipeline body and a second control switch; and when the second control switch receives the hazardous chemical substance alarm, the second control switch is in a closed state, and otherwise the second control switch is in an open state. According to the old bridge floor drainage emergency transformation system and the bridge, the rainwater containing pollutants and the rainwater containing the hazardous chemical substance can be separated, and the rainwater containing the pollutants or hazardous chemical substances can be prevented from directly flowing into a river body.

The invention discloses a drilling and polishing integrated multiple-hole-diameter conversion drilling machine capable of detecting the machining situation. The drilling and polishing integrated multiple-hole-diameter conversion drilling machine comprises a rack, a polishing pretreatment unit is mounted on the upper surface of the rack, a multiple-hole-diameter conversion unit is mounted on the position, on one side of the polishing pretreatment unit, of the upper surface of the rack, and a multi-directional detection unit is mounted below the multiple-hole-diameter conversion unit. Pretreatment work of surface rust-removing and stain-removing before machining is conducted on machined parts by the polishing pretreatment unit, the specifications of machining drill bits are automatically switched in the machining process by the multiple-hole-diameter conversion unit, the machining process is monitored remotely by the multi-directional detection unit, in the process that the parts are machined by the drilling machine, the machining situation is detected omni-directionally, the machining problem is precisely sensed and solved in time, and the technical problems that when the machiningparts with the different hole diameters are machined, replacing operation needs to be conducted manually, and before workpieces are machined, if stains such as rust occur on the surfaces, the machining quality is affected are solved.

The invention provides a plant rooting aid. The plant rooting aid comprises components in percentage by mass as follows: 0.001%-0.1% of graphene and graphene derivatives, 5%-15% of sucrose, 0.01%-1% of aspirin, 0.01%-1% of indoleacetic acid and 82%-94% of water. Under the interaction of graphene and graphene derivatives, aspirin and indoleacetic acid, the absorption effect of root part is enhanced, the utilization rate of a growth regulating agent is increased, consumption of a chemical agent can be greatly reduced, rooting cycle can be obviously shortened, growth is remarkably promoted, and the survival rate is increased. According to the plant rooting aid, the adsorptive property of the root system can be enhanced on the basis of an original rooting agent, root system growth is accelerated, and seedling culture time is shortened.

The invention discloses a sesame cake and a production method thereof in the technical field of processing of byproducts. The sesame cake is produced from the following raw materials in parts by weight: 10-15 parts of sticky rice, 3-5 parts of peanut kernels, 2-4 parts of sesame, 2-4 parts of common perilla seeds, 2-3 parts of walnut kernels, 2-3 parts of maltose, 0.5-1 part of honey, 0.5-1 part of rock candy, 0.5-1 part of brown sugar, 0.5-0.6 part of white sugar and 0.02-0.03 part of salt. The sesame cake disclosed by the invention is fragrant, sweet, crisp, full of nutrients and unique in flavour, does not stain hands, is easy to carry and low in content of unsaturated fatty acid, can not cause burden and influence on body and can not cause disease after being eaten due to the burden and body; meanwhile, the selected honey, peanut, sticky rice and common perilla seeds have the effects of maintaining beauty and keeping young, replenishing blood and reducing dryness as well as clearing internal heat and lubricating intestines, so that the sesame cake disclosed by the invention has extremely high health value, is convenient to popularize and apply and is a good item as a present to relatives and friends.

The invention discloses a system and a method for generating a calling detail record containing a called user number. The system comprises at least one calling signaling acquisition device for acquiring calling signaling messages, at least one MAP signaling acquisition device for acquiring roaming number request messages and roaming number request responded messages, and a concentrated business management system for receiving the above acquired messages and synthesizing a calling detail record containing a called user number. The method comprises initializing a system; acquiring calling signaling messages; synthesizing and storing an initial calling detail record; acquiring roaming number request messages and the roaming number request responded messages; synthesizing and storing a roaming number request business record; synthesizing and storing a calling detail record containing a called roaming number and a called user number. The system and the method may generate the calling detail record containing the called user number and enables a communication operator to be capable of accurately grasping calling conditions and calling information in a communication network.

The invention discloses an animal physiological index detection system and method and belongs to the technical field of animal physiological index detection. The system comprises a weighing unit; an animal detection structure is arranged on a weighing tray; the animal detection structure comprises an animal detection passage, an auto-door 1 is arranged at the back end of the animal detection passage while an auto-door 2 is arranged at the front end of the animal detection passage; a thermal infrared imaging sensor is arranged on a right guard; an ultrasonic sensor 1 is arranged at the back endof the right guard and used for detecting whether animals enter the animal detection passage or not and the distance between the ultrasonic sensor 1 to the animals; an ultrasonic sensor 2 is arrangedat the front end of a left guard. The detection method includes the steps of a, assigning an initial state to the system; b, detecting closing trigger signals of the auto-doors; c, acquiring information of the sensors; d, acquiring weight of animals; e, after finishing the step c, triggering to generate an opening signal of the auto-door 2; and f, detecting an opening trigger signal of the auto-door 1. The system and method has the advantages of high safety, high reliability, high automation level and the like.

The invention relates to a waste heat recycling and cleaning device for a solar power generation panel. The cleaning device comprises a direct-current generator driven by a Stirling heat engine, a starting motor, a low-speed transmission device, a solar power generation panel cleaner and a control circuit. The solar power generation panel can be self-cleaned, heat energy of the solar power generation panel can be used for power generation, and self-starting of the Stirling heat engine is achieved through the thermoelectric starter. According to the invention, the functions of self-cleaning, waste heat recovery, self-starting and the like of the solar power generation panel are realized, the solar power generation panel can be cleaned, the power generation efficiency of the solar power generation panel is improved, and redundant heat energy can be converted into electric energy.

The invention relates to the field of induction cookers, in particular to a household induction cooker. The household induction cooker comprises bases, a main body mechanism, a heat conducting plate,a supporting mechanism, supporting plates, supporting columns, sliding columns, clamping grooves, a limiting mechanism, shifting plates, driving plates and clamping plates. Tableware with the arc-shaped bottom is placed on the surface of the heat conducting plate, the shifting plates on the side faces of the two supporting plates then rotate clockwise, the driving plates rotate, the two clamping plates in the two supporting plates move relatively, the two sets of clamping plates slide out of the clamping grooves in the side walls of the sliding columns, and the two supporting plates move relatively. When the side walls, which are opposite, of the two supporting plates abut against the arc-shaped tableware, the shifting plates are loosened, so that the two clamping plates are clamped with the clamping grooves in the side walls of the two sliding columns to fix the supporting plates. At the moment, the two supporting plates abut against the tableware with the arc-shaped bottom to protectthe tableware, the situation that a tableware body shakes and food overflows to the surface of the induction cooker body due to boiling of the food in the tableware body is avoided when the tablewareof an arc-shaped structure is heated.

The invention provides a special-shaped thin-walled part fastening mechanism. The special-shaped thin-walled part fastening mechanism comprises a core shaft, a locking sleeve, a cage and tension blocks. The core shaft is composed of a cylinder piece and a cone piece. The cylinder piece of the core shaft is internally provided with a motor and a battery connected with the motor in a matched mode. Amotor shaft of the motor is arranged to the right, and the motor shaft is parallel to the central axis of the cylinder piece. A gear is installed at the right end of the motor shaft of the motor, thelocking sleeve sleeves the core shaft, an inner gear meshed with the gear is arranged in the left end of the locking sleeve, the right end of the locking sleeve is in threaded connection with the left end of the cage, the left end of the cage sleeve outside the right end of the locking sleeve, tension block positioning grooves adapted to the tension blocks are uniformly formed in the right end ofthe cage in the circumference direction. The special-shaped thin-walled part fastening mechanism has the beneficial effects that the structure is simple and clear, the use is convenient and fast, thin-walled parts can be conveniently and accurately placed on the fastening mechanism, and can be locked and loosened by the motor, so that the electromechanical integration is realized.

The invention relates to a positive electrode material and a preparation method and use thereof. The positive electrode material is a ternary positive electrode material jointly modified by titanium dioxide and lithium fluoride. The total mass percentage of the titanium dioxide and the lithium fluoride in the positive electrode material is 0.17 to 3.4%. The modification of the ternary positive electrode material by the titanium dioxide and the lithium fluoride solves the problem that the surface of the ternary positive electrode material is likely to absorb water to form lithium hydroxide andlithium carbonate and thus cause excessive alkalinity. The ternary positive electrode material is obviously improved in safety performance and cycle performance, has a rate capability 10C / 1C ratio of0.85 to 0.91, a specific capacity of 174 to 184mAh / g under a charge-discharge condition of 0.2C current density, and a capacity retention rate greater than or equal to 97.8% after 50 cycles.

Disclosed is a roll stand for edgers in rolling mills. Said roll stand is embodied in several pieces, comprising two crossheads (1a, 1b) and four longitudinal bars (4a, 4b) as main components (1) as well as one respective common cruciform (7) junction point (3) for the crosshead (1a, 1b) and the longitudinal bars (4a, 4b), which is located at the ends (6) of the longitudinal bars. Pretensioned through bolts (5) that act as a joint are used at least at the top ends (6) of the longitudinal bars.

The invention discloses a growth promoting device for soybean planting and a method thereof, belongs to the field of agricultural planting, can solve the problems that seeds cannot be screened and the soybean yield is influenced in an existing soybean planting mode, can promote growth of soybeans in advance, and is more beneficial to germination and growth of the soybeans. According to the device, the soybean screening speed can be adjusted, the soybeans can be taken out more conveniently after the soybeans are promoted to grow, the working efficiency is higher compared with a traditional salvage mode, and meanwhile damage to the soybeans during salvage is reduced. The method comprises the steps that firstly, during work, the supporting arm slides along the sliding groove formed in the adjusting plate, and the adjusting plate can be adjusted; secondly, during work, an air pump and a conveying roller are used in cooperation, and screening and recycling can be conducted; thirdly, the heating rod can play a role in temperature adjustment during working; and 4, during working, a screw rod, a heating rod and a discharging plate are matched for use, so that the soybeans can be conveniently taken out.

The invention discloses a mold clamping machine for a segmented PC wall panel mold, comprising a fixed plate group and a connecting plate group, wherein the connecting plate group is located above the fixed plate group, and the fixed plate group includes a fixed plate and two A snap mechanism, the snap mechanism is located at both ends of the fixed plate, the connecting plate group includes a supporting plate, a connecting mechanism and an adjusting mechanism, the upper side of the supporting plate is provided with a sliding hole along its length direction, the connecting plate The mechanism and the adjusting mechanism are located in the sliding hole, the connecting mechanism is located at one end of the adjusting mechanism close to the fixed plate, and the connecting mechanism is connected with the fixed plate. The problem of stable splicing of the mold.

The invention relates to a table tennis serving device, in particular to a table tennis serving device for sports table tennis training. For solving the technical problem, the table tennis serving device for sports table tennis training is provided; and the table tennis serving device is capable of automatically and rapidly converting a table tennis serving direction and limiting the position of atable tennis ball. According to the technical scheme, the table tennis serving device for sports table tennis training comprises a supporting seat, a rotating device, a funnel, a ball outlet pipe, afirst support, a first guide rod, a first spring, a push block, an N-shaped guide rod, a second spring, a first roller and the like; the rotating device is arranged at the upper part of the supportingseat; the funnel is arranged in the rotating device; the ball outlet pipe is arranged at the bottom of the funnel; the first support is arranged at the left end of the ball outlet pipe; and the firstguide hole is formed in the upper part of the first support. According to the table tennis serving device for sports table tennis training, a sector gear and a first gear are arranged for driving theball outlet pipe to swing forwards and backwards; the table tennis serving direction can be automatically converted; and the direction of the table tennis ball sent out by the ball outlet pipe can bechanged continuously, so that the response capacity and the strain capacity of people can be improved, and the training level can be improved.

The invention discloses a mold closing machine for a sectional type PC wallboard mold. The mold closing machine comprises a fixing plate set and a connecting plate set, the connecting plate set is located on the fixing plate set, the fixing plate set comprises a fixing plate and two buckle mechanisms, the buckle mechanisms are located at the two ends of the fixing plate, the connecting plate set comprises a supporting plate, a connecting mechanism and an adjusting mechanism, a sliding hole is formed in the upper side surface of the supporting plate in the length direction of the supporting plate, the connecting mechanism and the adjusting mechanism are located in the sliding hole, the connecting mechanism is located at the end, close to the fixing plate, of the adjusting mechanism, and the connecting mechanism is connected with the fixing plate. According to the machine, the problems that existing PC wallboard molds lack necessary mold closing equipment and the condition is adverse to stable splicing of the molds.

The invention discloses a photo processing method, device, and computer-readable storage medium. The method includes the following steps: acquiring work information of a terminal; judging whether the terminal is in an idle state according to the work information of the terminal; If yes, acquire a pre-stored photo, and process the photo according to a preset first image processing manner. According to the technical solution of the present invention, unlike the prior art, instead of performing image processing on the photo immediately after the terminal takes the photo, it detects whether the terminal is in an idle state, and performs image processing on the photo when the terminal is in the idle state, Since the idle state of the terminal means that the user does not use the terminal, image processing of photos in the idle state of the terminal will not cause adverse effects on the user even if it takes time and generates power consumption.

The invention discloses a medical instant messaging intelligent terminal based on a voice technology. The terminal comprises an equipment main body and a fixing clamp fixed at the rear end of the equipment main body; two microphones are arranged outside the equipment main body, and a broadcasting loudspeaker and an NFC chip are arranged at the front end of the equipment main body; a control mechanism is arranged in the equipment main body, and a master control mechanism comprises a data receiving module, a voice recognition module, a voice awakening module, a voice control module, a voice deploying module and an instruction sending module; and the data receiving module is used for receiving real-time voice information collected by two microphones, the real-time voice information is subjected to voice recognition by the voice recognition module, the voice recognition is used for carrying out and the voice recognition module is used for carrying out identity verification on the collected voice, and equipment awakening is carried out by using the voice awakening module after the voice passes the identity verification. According to the invention, medical staff can conveniently carry out voice communication, and the trouble of frequent disinfection is reduced.