126results about How to "Realize self-regulation" patented technology

The present invention discloses a kind of supporting equipment. It includes several steel pipes, the adjacent two steel pipes are mutually connected by means of connecting pipe, the interior of every steel pipe is filled up with concrete, and the butt-jointed position of two adjacent steel pipes is equipped with wood pad or other flexible pad, in the centre of said flexible pad is cut a through hole through which the concrete can be flowed on the side portion pipe wall of said supporting equipment a grouting hole is cut, and on the upper portion pipe wall of said supporting equipment an air exhaust hole is cut. Said supporting equipment can be used for roadway support.

The invention provides an adjusting method of gamma voltage for an OLED displaying device and relates to the technical field of displaying technologies. User autonomic adjusting can be achieved, the method is easy to implement, returning to factory is of no need, and accordingly maintaining cost is effectively lowered. The method comprises the steps that testing pictures stored in the OLED displaying device in advance are obtained, and first data information of the testing pictures is extracted; the first data information comprises current parameters or optical parameters; the first data information and second data information of testing pictures stored in advance before OLED displaying device aging are subjected to contrastive analysis processing, and the aging coefficient of the OLED displaying device is obtained; the second data information comprises current parameters or optical parameters; and a gamma voltage value group corresponding to the aging coefficient is obtained, gamma voltage values are output to a gamma integrated circuit of the OLED displaying device, and adjusting of the gamma voltage is completed. The adjusting method is used for adjusting of the gamma voltage of the OLED displaying device.

The invention discloses a foaming pumping system for physically foamed foam concrete, which comprises a frame with a foam concrete mixing conveying mechanism, a foam making mechanism, a cement slurry mixing mechanism and a controller inside, and the foam making mechanism and the cement slurry mixing mechanism are respectively connected with the foam The concrete mixing and conveying mechanism is connected, and the foam making mechanism, the cement mixing mechanism and the foam concrete mixing and conveying mechanism are respectively connected to the controller; the present invention integrates the huge device into a main engine and a continuous mixer through equipment integration, occupying a small space, and at the same time Qualified foam concrete can be obtained to ensure the quality of the building. The speed and flow of each link of the equipment can be controlled through the control of multiple sensors and microcomputers, and the analysis and processing of data by the microcomputer enables it to be adjusted in time. , so as to obtain the best quality foamed concrete; and the device can pump the foamed concrete to a height of 300-350 meters, which has brought into play its practical value.

An intercity or urban rapid air rail transport system comprises stations, supporting columns, rails, turnouts, rail cars, a power supply system and a control system. The rails are erected in the air by means of the supporting columns. The stations are arranged at endpoints or client sides of the rails. The stations, the rails and the turnouts form a rail transport network system like the Internet. The rail cars move along the rails by means of the power supply system and the control system. The intercity or urban rapid air rail transport system can be manufactured at low cost within a short period of time in batches, transport efficiency can be greatly improved, transport cost can be reduced, traffic accidents can be eradicated, and the intercity or urban problems of traffic jam and environment pollution are effectively solved.

The invention relates to an instrument for optical measurement and its measurement method. The measuring instrument includes a laser pointing beam expander, a host, a support and a base. There is a laser pointing beam expander and a longitudinal translation mechanism of the host, and a laser pointing beam expander, a host lifting adjustment mechanism and a horizontal rotation positioning mechanism are arranged between the support and the base; the laser pointing beam expander and the host longitudinal translation mechanism include a micrometer, The laser pointing beam expander and the host horizontal rotation positioning mechanism include a horizontal rotating plate, a rotating rod, a limit block and a horizontal support plate, a support structure and a limit structure, and the laser pointing beam expander and the host lifting adjustment mechanism include a lifting adjustment column I and Ⅱ; The measurement method includes the laser pointing beam expander and the preparatory steps of adjusting the height, longitudinal position and horizontal direction of the host. The invention integrates flexibility, convenience and practicability, thereby reducing labor intensity of workers and improving construction efficiency.

An intelligent controller of a municipal water supply pipeline, the communication interface unit is connected with the microprocessor unit, and is interconnected with the communication interface unit network in the intelligent controller of the adjacent node in the pipeline system; the parameter acquisition unit real-time acquisition includes water pressure, water Flow rate, water flow rate, water quality pipeline parameters, and transmit each parameter to the microprocessor unit; the microprocessor unit connects the network with the adjacent intelligent controller node through the communication interface unit, and analyzes and processes the parameters collected by the parameter acquisition unit in real time, According to the parameters, the power and leakage analysis model of the water supply pipeline is established, and instructions are sent to each unit. The present invention also provides a municipal water supply pipeline operation monitoring system constructed by using the above-mentioned intelligent controller of the municipal water supply pipeline. The invention has the advantages that: through the intelligent controller, municipal water supply pipelines can form information sharing, realize pipeline leakage analysis, water quality safety analysis, and operation safety risk warning, and improve the stability and timeliness of system control.

The invention provides an agricultural plant-protection levitation-type flight work platform, which solves the problems of the existing aircraft that the safety coefficient is not high and safety potential danger exists. The agricultural plant-protection levitation-type flight work platform comprises a levitation lifting body, a propelling part and a lifting part, wherein the lifting part is embedded in a central duct of the levitation lifting body and used for adjusting the operation height of the work platform in real time; and the levitation lifting body is connected with the propelling part, and the propelling part is used for supplying thrust and steering force needed by the flight. The agricultural plant-protection levitation-type flight work platform has the advantages of safety in use, low flight height, controllability in flight speed and suitability for distributing the plant-protection preparation and can prevent the problems such as the threat of facilities or personnel on the ground brought by the flight accident easily caused by the low safety coefficient and safety potential danger of the existing aircraft in the flight process; and through the control of a uniform command of a subarea control station, on the premise that the normal operation effect of the agricultural facilities is not influenced, completely-unmanned and automatic high-efficient agricultural plant-protection operation can be effectively realized.

The invention discloses an adaptive control method for a wind driven generator set to participate in primary frequency modulation. The method comprises firstly, deriving the dynamic expression of a wind driven generator adaptive virtual inertia parameter K1,t in combination with the characteristics of the wind driven generator and the current rotational kinetic energy of the wind driven generator;further determining a wind driven generator adaptive unit adjustment power K2,t in combination with the current output level and the current load shedding level of the wind driven generator; finally,giving the structure of a wind driven generator primary frequency modulation control module in combination with the wind driven generator adaptive virtual inertia parameter K1,t and the wind driven generator adaptive unit adjustment power K2,t, and realizing an adaptive virtual inertia control and adaptive droop control function. The method not only can reasonably and effectively utilize the primary frequency modulation capability actually provided by the wind driven generator, but also can improve the adaptability of the wind driven generator to the large disturbance scene and avoid possiblefault conditions.

The invention belongs to the technical field of semiconductor storage manufacturing, namely a method for preparing a metal nanocrystalline storage capacitor. By the method, a metal nanocrystalline with an adjustable work function can be directly obtained on the surface of Al2O3, HfO2, La2O3 and Nb2O5 films deposited on an atomic layer, or a laminated combination of the Al2O3, HfO2, La2O3 and Nb2O5 films or a multi-element mixed thin film surface at room temperature. By the method, one layer or multiple layers of nanocrystalline can be embedded in the medium film; the layers are completely isolated through the medium film; and the size and distribution of each layer of nanocrystalline are not affected in the subsequent medium film depositing process substantially.

The invention discloses a circulating water management device, a circulating system and a management method based on a cooling tower, and relates to the technical field of external hanging type cooling circulating water equipment. A water inlet temperature detection device and a water outlet temperature detection device are arranged at a water inlet pipe and a water outlet pipe of the cooling tower correspondingly, a cooling tower body is provided with a temperature and humidity detector so as to detect and obtain the actual heat exchange demand quantity, data analysis and comparison are carried out on the actual heat exchange demand quantity and the cooling tower heat exchange supply quantity, then the actual working power of a variable frequency fan of the cooling tower is properly adjusted within a reasonable range according to the comparison result, so that the actual working power of the variable frequency fan is matched with the heat exchange value of the cooling circulating water flowing into the cooling tower, then the purpose of reducing the water consumption and the electric energy loss of the cooling tower and the cooling circulating system is achieved, and then the normal operation of a refrigeration or process device is guaranteed.

The invention relates to an attention training method and system based on cooperative control of breathing and force tactile sense. By combining the characteristic of paying attention to body breathing during meditation with the characteristic of paying attention to muscle strength control by a force tactile sense channel, visual detection of an attention state in a training process is realized bya synchronism error between a breathing signal and a force tactile sensor signal. The training method comprises four subtasks. The training difficulties of the four subtasks are in turn increasing, and can be separately trained or progressively trained. An attention training system for implementing the attention training method is also provided. The attention training is completed by the continuous cooperative control of the breathing and the force tactile sensor, and the attention focusing state in the training is reflected by the synchronism error between the breathing signal and a muscle strength output signal; when the calculated synchronism error exceeds a specified threshold value, the system sounds an alarm reflecting a low attention level; meanwhile, the design of the progressivestage subtasks is favorable for maintaining the enthusiasm and attention of a user for the training, so that the attention adjustment ability of target people is improved.

The invention discloses a ratchet strip and ratchet type meter reading bracket which comprises a sleeve and a first ratchet strip. The sleeve is a long-strip-shaped pipe with an upper opening and a lower opening. The upper end of the sleeve is provided with a forwards-protruding boss. The first ratchet strip is a long-strip-shaped ratchet strip with downward ratchet teeth arranged on the front side face, is mounted in the sleeve, and can move up and down along an inner cavity of the sleeve. A long-strip-shaped opening is formed in the right side face of the sleeve. The first ratchet strip is fixedly connected with a platform through the long-strip-shaped opening. The platform is horizontally placed and can move up and down along the first ratchet strip. The ratchet strip and ratchet type meter reading bracket further comprises a first ratchet which is mounted in front of the lower end of the sleeve and penetrates through an opening formed in the corresponding position of the sleeve to be matched with the first ratchet strip. A shell is arranged on the periphery of the first ratchet. A ratchet shaft of the first ratchet is mounted on the shell through a bearing. A first handle is arranged at the right end of the ratchet shaft of the first ratchet. The ratchet strip and ratchet type meter reading bracket can assist meter reading personnel in aligning a meter reading device to an electric energy meter at a high position.

The invention discloses an aviation superconducting full-tensor magnetic gradient data acquisition system and method based on NI cRIO. The system comprises an NI cRIO controller, a C-series I / O module, an SQUID work point adjustment control module and a human-computer interaction interface. A model of the NI cRIO controller is NI 9033 and the controller comprises an NI Real-Time controller and a4-slot FPGA chassis. The C-series I / O module comprises an NI 9202 analog signal acquisition card, an RS232 serial acquisition card, and an NI 9401 digital I / O acquisition card. All three board cardsare plugged into the FPGA chassis of the NI 9033 controller. In the invention, the NI9033 is taken as a real-time controller, and a set of the aviation superconducting full-tensor data acquisition andcontrol system is constructed; the human-computer interaction interface displays collected data in real time, and a 40M crystal oscillator on the FPGA chassis and a PPS signal of GPS are used so thatsynchronization accuracy of SQUID magnetic data, an inertial navigation posture and position data reaches 1000 ns.

The invention discloses an anti-sedimentation magnetorheological damper based on online monitoring. The anti-sinking magnetorheological damper mainly comprises an anti-sedimentation magnetorheologicaldamper, an ultrasonic transducer and a processing circuit. The magnetorheological damper is provided with a working cylinder. When the magnetorheological damper is in a resting state, magnetorheological fluid is settled, the processing circuit continuously acquires the receiving voltage Ex of the ultrasonic transducer through a wire harness, calculation is carried out to obtain concentration changes ax caused by settlement at time t, when a set threshold k is reached, an electric excitation signal is sent to the magnetorheological damper, and a driving motor organizes a flow cycle in the magnetorheological damper to perform magnetorheological fluid dispersion. According to the anti-sedimentation magnetorheological damper, as for the vertically-used magnetorheological damper, based on thepropagation mechanism of ultrasonic waves in suspension liquid, the anti-sedimentation magnetorheological damper based on online monitoring is proposed, and self regulation and control and sedimentation resistance of the magnetorheological fluid of the magnetorheological damper can be achieved.

The present invention discloses a kind of supporting equipment. It includes several steel pipes, the adjacent two steel pipes are mutually connected by means of connecting pipe, the interior of every steel pipe is filled up with concrete, and the butt-jointed position of two adjacent steel pipes is equipped with wood pad or other flexible pad, in the centre of said flexible pad is cut a through hole through which the concrete can be flowed on the side portion pipe wall of said supporting equipment a grouting hole is cut, and on the upper portion pipe wall of said supporting equipment an air exhaust hole is cut. Said supporting equipment can be used for roadway support.

The invention provides a modularized robot, which comprises a first machine body plate, a second machine body plate and at least two flexible joints, wherein each flexible joint comprises a control device and two elastic adapting pieces; one end of one elastic adapting piece is fixedly connected with the first machine body plate, and the other end of the elastic adapting piece is movably connected with the control device; one end of the other elastic adapting piece is fixedly connected with the second machine body plate, and the other end of the elastic adapting piece is movably connected with the control device; the control device is used for controlling the elastic adapting pieces to stretch and contract. The modularized robot is provided with the at least two flexible joints, a machine body is bent by controlling the flexible joints to stretch and contract, the automatic regulation of the machine body gesture is realized, the flexibility of the modularized robot is improved, and the modularized robot can be suitable for the complex terrain.

The invention discloses a method of deeply modifying attapulgite to prepare a nano carrier material; the method comprises the steps of crushing attapulgite, screening, rinsing with water, separating by settling, and drying to obtain primary attapulgite; subjecting the primary attapulgite to primary acid modification, filtering and separating, washing, and drying to obtain acid-modified attapulgite; subjecting the acid-modified attapulgite to secondary alkali modification in an ice-water bath under the protection of nitrogen, filtering, separating, washing, and drying to obtain deeply-modified attapulgite; cyclically modifying via filtrates obtained by the primary acid modification and secondary alkali modification and part of a washing liquor which fresh inorganic acids and alkaline salts are added, and neutralizing the rest washing liquor. Attapulgite is deeply modified via chemical redox at low temperature, further improvements on surface characteristics and texture performance of the attapulgite are promoted, modification wastewater is effectively treated, and the method is an efficient green thorough method of modifying attapulgite.

The invention discloses a dedusting system. The dedusting system is used for asphalt-concrete stations, and comprises a temperature control device (1), a cloth bag dedusting device (2), and a spray dedusting device (3) which are connected successively; the temperature control device (1) is connected with an exhaust gas outlet; the temperature control device (1) comprises a hollow inner container (14), and a housing; a circulation line (15) is arranged between the housing and the hollow inner container (14); a temperature sensor (13) is arranged between the temperature control device (1) and the cloth bag dudusting device (2); the spray dedusting device (3) comprises a housing body, and a filter screen (31) and a nozzle (33) arranged in the housing body; the nozzle (33) is connected with a water pipe (32), and is arranged above the filter screen (31). Dedusting effect of the dedusting system on exhaust gas is excellent; the temperature of exhaust gas can be controlled effectively; and service life of dedusting equipment is prolonged.

The invention relates to the technical field of battery packs, in particular to an explosion-proof hollow lithium battery pack with a force release mechanism. The explosion-proof hollow lithium battery pack comprises a battery box, a top cover and batteries, wherein the top of the battery box is blocked by the top cover, a plurality of uniformly distributed batteries are arranged in an inner cavity of the battery box, a control device is padded between two adjacent batteries, and a rubber cushion plate is arranged on the battery on one side of the inner wall of the battery box and is cushioned between the battery box and the battery. By means of the structural design, the efficient heat dissipation effect of the interior of the battery pack is achieved, gas is injected into the battery box, gas flow gathers towards a high-temperature area in the battery pack, and then the gas is exhausted through a long box at the corresponding position, so that the automatic regulation and control of airflow flowing are realized. If the battery pack is impacted by the outside and part of the batteries deviate in position, the rapid correction of the positions of the batteries can be realized by pressing the top assembly.

The invention relates to a novel impedance-variable energy-saving transformer. The novel impedance-variable energy-saving transformer comprises a transformer oil tank (6), wherein the transformer oil tank (6) is internally provided with a transformer iron core and a transformer winding (5). The novel impedance-variable energy-saving transformer is characterized in that the transformer oil tank (6) is internally provided with a shielding plate (3) so that the inner part of the transformer oil tank (6) is separated into a transformer chamber and a current-limiting reactor chamber; the transformer chamber is internally provided with the transformer iron core and the transformer winding (5); the current-limiting reactor chamber is internally provided with a current-limiting reactor (1) and a rapid switch (2); the rapid switch (2) is connected with the current-limiting reactor (1) in parallel; after the rapid switch (2) is connected with the current-limiting reactor (1) in parallel, the rapid switch (2) is connected with a high-voltage winding in the transformer winding (5) in series. With the adoption of the novel impedance-variable energy-saving transformer, the automatic adjustment of impedance can be realized; meanwhile, the loss is reduced and the economic benefits are improved.

The invention discloses a greenhouse high-yield prawn culture method with water temperature informatization autonomous regulation and control. The method specifically comprises the steps as follows: building a culture pond, transforming the culture pond, reasonably putting prawn seeds, reasonably feeding, monitoring and adjusting a culture environment, combining with intelligent monitoring and control, and based on 4G / 5G communication technology support, utilizing the Internet to connect with a portable production mobile management terminal to realize automatic monitoring. According to the method, an appropriate environment in prawn water is imitated, disinfection, cleaning and maintaining are convenient, aquaculture cost is reduced, moreover, a temperature sensor and a display are configured to realize informatization display of water temperature, and through matching with an aerator, a feeding device and water circulation equipment, autonomous regulation and control of the aquaculture environment are realized, and the aquaculture temperature and the dissolved oxygen content and pH value of aquaculture water are controlled; and through matching with reasonable supply of baits and adjustment of water fertility, the survival rate and effective growth rate of prawn culture are increased, and the purposes of saving cost and improving efficiency are achieved.

The invention relates to a low-pressure wireless hair dryer. The low-pressure wireless hair dryer comprises an air cylinder and a handle, wherein the air cylinder is communicated with an inner cavityof the handle, the air cylinder is internally provided with a heating part, the heating part comprises a heating element, the heating element is made from a flexible material, and electro-thermal conversion can be achieved under a low voltage condition; the handle is internally provided with a circuit control board and a battery, the heating element and the battery are connected with the circuit control board separately, and the battery supplies power to the heating element through the circuit control board. The low-pressure wireless hair dryer can work under low voltage, has high safety performance, is not restricted by the use environment, and is convenient to store and use.

The invention provides a flexible electronic system capable of automatically adjusting binding force. The flexible electronic system comprises a deformable flexible substrate, a heating device and a volatile substance, the deformable flexible substrate comprises a film-based substrate and a combined body array, the combined body array is used for being in contact with a combined object and applying binding force; the film-based substrate bears the combined body array and can deform under pressure; a sealed liquid cavity is formed in the deformable flexible substrate; volatile substances are accommodated in the liquid cavity; the volatile substances are in a liquid state at the normal temperature, a heating device is borne by other parts, except the film-based substrate and the combined body array, of the deformable flexible substrate, when the heating device emits heat, the volatile substances are heated and volatilized into a gas state, the film-based substrate bulges towards the exterior of the liquid cavity, and the combined body array deforms, so that the binding force is reduced. The flexible electronic system capable of automatically adjusting the binding force has the characteristic of automatic regulation and control, and can be conveniently separated from the combined object without damaging internal electronic devices.

The invention particularly relates to a disposable platelet-rich plasma separation device, which is used for realizing aseptic disposable PRP separation in the whole process, and comprises an upper cover, a cylinder body, a lower cover, a PRP cylinder, an inner bushing and a baffle. According to the invention, separation can be completed by only one-time centrifugation without plasma transfer, sothat the operation is more convenient; transfer is not needed, so that the blood is completely isolated from the outside in the whole process so as to fundamentally reduce the possibility of being polluted; PRP can be collected in the PRP cylinder, so that the platelet enrichment degree is high, and the highest platelet enrichment degree can be about 50 times; the platelet enrichment degree can beautonomously adjusted as required, so that the operation is convenient; and in the operation process, the platelet loss is small, the difference is not too large when different persons operate, and the consistency of the PRP quality can be better guaranteed.

The invention discloses an electric heating ice-proofing anti-fog transparent conductive film for an invisible plane and a preparation method thereof. The electric heating ice-proofing anti-fog transparent conductive film comprises a side A and a side B, wherein different transparent films are respectively arranged on the side A and the side B; the side A is an electric heating film system, and the side B is an invisible functional film system; the electric heating film system comprises an electric heating adhesion layer, an electric heating functional layer and an electric heating protective layer from a glass substrate inside-out sequentially; and the invisible functional film system comprises an invisible adhesion layer, an invisible functional layer and an invisible protective layer from the glass substrate inside-out sequentially. The electric heating ice-proofing anti-fog transparent conductive film has radar-invisible and electric heating ice-proofing anti-fog functions, has optical property controllability and radar wave reflection capability, can meet the requirement of aircraft invisibility, and enables the characteristic signal returned to radar to be reduced by 10dB or over and the visible light transmittance to be increased by 80 percent or over.

Disclosed is a multifunctional sniper rifle buttstock. The multifunctional sniper rifle buttstock comprises a buttstock body, a connector portion, a cheek attaching plate and a shoulder rest. The lower portion of the cheek attaching plate is connected with a cheek attaching plate threaded rod which is in tooth meshing with a cheek attaching plate adjusting hand wheel. The shoulder rest is locked on a shoulder rest height adjusting portion through a shoulder rest height adjusting hand wheel, and the shoulder rest height adjusting portion is connected with a threaded rod which is in tooth meshing with a shoulder rest front-and-rear adjusting hand wheel. A supporting rod is arranged in the buttstock body, a rectangular thread structure is arranged in the circumferential direction of the supporting rod, and a rotatable locking buckle is combined with the rectangular thread structure in a clamping mode by the use of the torque of a pole spring. The multifunctional sniper rifle buttstock hasthe advantages that the adjustability of the buttstock structure is achieved, and the universality of the buttstock in the battlefield environment is improved; the purpose that a sniper adjusts the position of the cheek attaching plate of the buttstock and the rifle length by himself according to the physiological features and personal habits is achieved, and the optimal man-machine working efficiency can be better achieved between the buttstock and the sniper; and the multifunctional sniper rifle buttstock can be generally used in all sniper rifles with the calibers smaller than 20mm, and isconvenient to use, and the required number of the buttstocks can be reduced.

The invention relates to a piezoelectric transformer based on shearing vibration and a preparation method thereof. The piezoelectric transformer comprises a piezoelectric material, wherein the piezoelectric material is polarized in the thickness direction; electrodes covers two surfaces of the piezoelectric material in the width direction; the electrode on at least one surface comprises a plurality of mutually separated independent electrodes; a plurality of vibration base elements are formed; different numbers of vibration base elements in different positions in the plurality of vibration base elements are used as input ends or output ends of the transformer; and the transformer ratio is regulated through the proportion of the vibration base elements at the input end and the output end. The piezoelectric transformer provided by the invention can realize the independent regulation of the transformer ratio; the conversion efficiency of the transformer is improved; the production cost islow; the performance is high; and miniaturization, lightening and thinning can be realized.

The invention discloses a suspension device, a control method of the suspension device, a vehicle and engineering machinery. The suspension device comprises an upper cross beam, a lower cross beam, a watt connecting rod mechanism, an automatic posture adjusting system and a vibration reduction system. One end of a connecting rod A in the Watt connecting rod mechanism is connected with an upper cross beam, the other end of the connecting rod A is connected with a hydraulic cylinder A, one end of a connecting rod B is connected with the upper cross beam, and the other end of the connecting rod B is connected with a hydraulic cylinder B; the posture autonomous adjusting system is connected with the hydraulic cylinder A and the hydraulic cylinder B and used for controlling the hydraulic cylinder A and the hydraulic cylinder B to stretch out and draw back according to the cab inclination angle so as to realize autonomous adjustment of the cab inclination angle; the vibration reduction system is connected with the hydraulic cylinder A and the hydraulic cylinder B and used for adjusting damping and rigidity of the hydraulic cylinder A and the hydraulic cylinder B so as to achieve active vibration reduction of the cab. According to the invention, cab swing stable control, inclination attitude control and active vibration reduction can be realized at the same time, and the vibration comfort of the cab is improved.

The invention discloses an elevator automatic audio speaker in a car elevator. The structure of the elevator automatic audio speaker comprises a memorizer, a singlechip, an MP3 decoder, a power amplifier, an audio output device, a time control switch and a power supply, wherein the memorizer is connected with the singlechip, and the singlechip is connected with the audio output device after being connected in series with the MP3 decoder and the power amplifier in sequence, the time control switch is respectively connected with the singlechip and the audio output device, the power supply input terminal of the time control switch is connected with the power supply, the singlechip is also connected with a serial interface, and the memorizer is an erasable data memorizer. The elevator automatic audio speaker can automatically control the play time of the audio speaker through the time control switch, update the play content at any time and connect the elevator serial data through a serial port, achieves the self-regulation of the elevator to play, and has simple structure and convenient installation.

The invention provides a method for preparing a flexible electronic system with self-adjusting binding force. The method comprises the following steps: preparing a deformation flexible substrate, namely preparing the deformation flexible substrate which has a liquid cavity, a membrane-based substrate and a combination array supported by the membrane-based substrate, wherein the membrane-based substrate forms the cavity wall of the liquid cavity, and the combination array is used for contacting with a combination target and used for exerting binding force; filling the liquid cavity with a volatile substance, sealing the liquid cavity, and keeping the volatile substance at a liquid state at a normal temperature; combining the deformation flexible substrate with a heating device; when the heating device emits heat, heating and volatilizing the volatile substance to a gas state, enabling the membrane-based substrate to swell to the exterior of the liquid cavity, and deforming the combination array, so as to reduce the binding force. The flexible electronic system with self-adjusting binding force has the characteristic of autonomous regulation and control, and can be easily detached from a bonded object without damaging internal electronic devices.