94results about How to "Recoverable" patented technology

The invention relates to an ultraviolet detector, in particular to a visible-blind ultraviolet detector based on a Beta-Ga2O3 / SiC heterojunction thin film and a fabrication method of the visible-blind ultraviolet detector. According to the fabrication method, a layer of Beta-Ga2O3 thin film is deposited on an n-type 6H-SiC substrate by a laser molecular beam epitaxial technique, and then a layer of Ti / Au thin film is deposited on the n-type 6H-SiC substrate and the Beta-Ga2O3 thin film through a mask by a radio frequency magnetron sputtering to be used as an electrode. The fabricated visible-blind ultraviolet detector has the advantages of stable performance, response sensitivity, small dark current and high potential application; and moreover, the fabrication method has the characteristics of high process controllability, simplicity in operation, high universality, restorability of repeated test and the like, and has great application prospect.

The invention discloses a recyclable vehicle-mounted head up display which comprises a light source, a reflecting device, a movable support, a dustproof device, a sliding block, a sliding block rail and a box body. The dustproof device is of a telescopic structure, and the length of the dustproof device is controlled by spreading or contracting the dustproof device. The movable support, the sliding block, the sliding block rail and the light source are mounted and fixed in the box body, the sliding block is mounted on the sliding block rail and can move relative to the sliding block rail, and thus the dustproof device is driven to retract or rotate. The reflecting device is mounted on the movable support, and the movable support can rotate relative to the box body to move between at least one rest position and at least one display device. Correspondingly, the invention further discloses a vehicle adopting the recyclable vehicle-mounted head up display. Through the adoption of the recyclable vehicle-mounted head up display and the vehicle, dust can be prevented, the size is small, little vehicle space is occupied, a good display effect is achieved, and the sight of a user is not influenced.

The invention relates to a preparation method of a solar blind type ultraviolet detector based on Ga2O3 / CuAlO2 heterojunction. The method is characterized in that a layer of p-CuAlO2 thin film is deposited on a quartz (SiO2) substrate through a radio frequency magnetron sputtering technology; then, a layer of n-Ga2O3 thin film is deposited on the p-CuAlO2 thin film by using a mask plate through the radio frequency magnetron sputtering technology; the area of the n-Ga2O3 thin film is half of the area of the p-CuAlO2 thin film; finally, a layer of Ti / Au thin film is deposited on the p-CuAlO2 and n-Ga2O3 thin films by the radio frequency magnetron sputtering technology and is used as an electrode. The preparation method has the advantages that the prepared solar blind type ultraviolet detector has stable performance, sensitive response, small dark current and wide application range; in addition, the preparation method has the characteristics of high process controllability, simple operation, good universality, recoverability during repeated test and the like; great application prospects are realized.

The invention relates to an ultraviolet detector, in particular to an ultraviolet detector with high spectral selectivity and high sensitivity and a preparation method of the ultraviolet detector. A beta-Ga<2>O<3> film is deposited on an n-type 4H-SiC substrate through a laser molecular beam epitaxy technique; and a Ti / Au film is deposited on the n-type 4H-SiC substrate and the beta-Ga<2>O<3> film for use as an electrode by a mask through a radio-frequency magnetron sputtering technique. The ultraviolet detector has the advantages that the prepared ultraviolet detector has stable performance, has high selectivity and high sensitivity on an ultraviolet spectrum with a specific wavelength, is low in dark current, and can be applied to fire alarm, high-voltage line corona and detection of the spectrum with the specific wavelength; furthermore, the preparation method has the characteristics of being high in process controllability, simple in operation, good in universality and the like and has a great application prospect; and a repeated test has recoverability.

The invention relates to an ultraviolet detection device based on a gallium oxide thin film and a preparation method thereof, in particular to an ultraviolet detection device based on a gold nanoparticle enhanced Ga2O3 thin film and a preparation method thereof. The preparation method includes the steps that a layer of Ga2O3 thin film is deposited on a Si substrate according to the radio-frequency magnetron sputtering technology; then, a layer of gold thin film is deposited on the surface of the Ga2O3 thin film, the obtained gold thin film is subjected to spheroidizing annealing, and thus gold particles are obtained; finally, a layer of gold thin film interdigital electrodes are deposited on the Au-Ga2O3 thin film with a mask. A photoelectric property testing result of the ultraviolet detection device shows that the device has good photoelectric responses. The ultraviolet detection device based on the gold nanoparticle enhanced gallium oxide thin film and the preparation method thereof have the advantages that the prepared ultraviolet detection device based on the gold nanoparticle enhanced gallium oxide thin film is stable in property, capable of making sensitive responses and small in dark current and has good potential application; besides, the preparation method is strong in process controllability, easy to implement and good in universality, has restorability in repeated testing and has broad application prospects.

The invention relates to an optical grating agglutination alignment mechanism in a space heterodyne interferometer, which is arranged on a base plate of the interferometer, comprises a beamsplitter, optical wedge distance pieces arranged in two paths, an expanding view field prism and an optical grating distance piece, takes on an 'L' shape and is an integrated interference body preposed unit provided with two arm ends which are an X arm and a Y arm. The mechanism is characterized in that a two dimension adjusting mechanism and an angular adjustment mechanism are respectively arranged at the two arm ends of the integrated interference body preposed unit on the base plate; meanwhile, a monitoring system formed by an even light source, an imaging lens positioned on an output optical axis, a CCD photoelectric receiving device and a display; and interference image is generated by the emergent ray of the even light source through the interferometer, and the monitor image can be acquired in the display. The mechanism is convenient for operation and strong in reliability, and can be used for monitoring the interference effect in real time.

The invention relates to an ultraviolet / solar blind ultraviolet two-color detector, in particular to a monolithically-integrated multi-functional ultraviolet / solar blind ultraviolet two-color detector and a fabrication method thereof. A layer of gallium oxide thin film is deposited on a silicon carbide substrate by a laser molecular beam epitaxial technology, and then a layer of titanium / gold thin film is deposited on the silicon carbide substrate and the gallium oxide thin film by a mask plate through a radio frequency magnetron sputtering technology to be used as an electrode. The monolithically-integrated multi-functional two-color ultraviolet detector fabricated according to the method has the advantages of reaction sensitivity, performance stability and low dark current, the functions of ultraviolet flame detection and ultraviolet intensity detection of a solar blind region can be separately achieved in different voltage modes, and the monolithically-integrated multi-functional two-color ultraviolet detector can be used for detecting fire alarm, high-voltage line corona and solar ultraviolet intensity; and moreover, the fabrication method has the characteristics of high process controllability, high universality, restorability of repeated tests and great application prospect, and is simple to operate.

The invention belongs to the technical field of ultraviolet photoelectric detectors, and particularly relates to an ultraviolet photoelectric detector based on a gallium oxide heterojunction structureand a preparation method thereof. The ultraviolet photoelectric detector includes an alpha-Ga2O3 / beta-Ga2O3 heterojunction nanosheet array, ITO transparent conductive glass, and a Ti / Au film electrode. An alpha-Ga2O3 / beta-Ga2O3 heterojunction nanosheet is formed by wrapping an alpha-Ga2O3 nanosheet as a core in beta-Ga2O3 as a shell. The ultraviolet photoelectric detector of the invention has stable performance, sensitive reaction and small dark current, and has a good ultraviolet photoelectrical response effect. The preparation method has the characteristics of strong process controllability, simple operation, good universality, and the like, is expected to be widely applied to fields such as self-powered flame detection, high-voltage line corona and missile plume, and has high popularization value.

The invention relates to a novel swing self-reset bridge pier with an energy dissipation device and an application thereof, belonging to the technical field of anti-seismic and seismic mitigation andisolation of bridges. The novel swing self-reset bridge pier with the energy dissipation device comprises a cap beam (1), a pier body (2), a bearing cap (3), pile foundations (4), prestressed steel bars (6) and shear anchor bolts (7). The bearing cap (3) is anchored to the ground through the pile foundations (4), and the cap beam (1) is anchored to the bearing cap (3) through the pier body (2), the prestressed steel bars (6) and the shear anchor bolts (7). The novel swing self-reset bridge pier with the energy dissipation device further comprises a tension-compression combined energy dissipation device (5) and the tension-compression combined energy dissipation device (5) is installed and fixed at the junction of the bottom of the pier body (2) and the top surface of the bearing cap (3). The swing self-reset bridge pier has the obvious advantages of no damage after earthquake, small residual deformation and recoverable structure.

The invention discloses a device and a method for simulating short circuit faults of a doubly-fed generator rotor. The device comprises six groups of leads which are led out from the interior of a magnet exciting coil of the doubly-fed generator rotor, the six groups of leads at the non-shaft-extension end or the shaft extension end of the rotor are connected with six groups of carbon brushes respectively via a slip ring, the six groups of carbon brushes are connected with a short circuit cabinet via leads, a controllable contactor is mounted in the short circuit cabinet, and a turn-to-turn short circuit control button, a rotor interphase short circuit control button, a rotor interlayer short circuit control button and a phase-to-ground interphase short circuit control button are arranged on the short circuit cabinet. On and off of the controllable contactor is controlled by the different buttons to achieve connection and disconnection of different leads, so that controllable simulation of various short circuit faults of a generator is achieved. The invention further provides a leading method of the device and the method for simulating the short circuit faults of the doubly-fed generator rotor. The device and the method have the advantages that the short circuit faults of the generator rotor can be simulated truly, actual short circuit fault signals of the generator rotor can be acquired, and support is provided for researches and verifications of relative fault diagnosis algorithms.

The invention discloses a method for achieving data caching in the database synchronization process. The method includes the insertion step and the consumption step. In the insertion step, memory space with a fixed length is developed in a memory and used for storing monitored source database synchronous data; a list is newly established in a database and used for storing the monitored source database synchronous data and newly-added attributes of the synchronous data. In the consumption step, when a data consumption request is received, reading is conducted on the memory space, if reading fails, retrieval is conducted on the list of the database, in the reading process, if no data exist in the memory space, the data are copied to the memory from the list of the database at the moment, and then reading is conducted on the memory. The pressure of the memory space is relieved through database synchronous recording, and the problem that a system breaks down due to the fact that the synchronous data are instantly and rapidly increased is solved; the synchronous data can be restored after the system is restarted.

The invention discloses a crack plugging agent based on expansion particles and solidifiable particles, and belongs to the technical field of profile control and water plugging of an oil field. The crack plugging agent is composed of the expansion particles and the solidifiable particles which are separately stored, the mass ratio of the solidifiable particles to a solidification agent is 100:(5-20), and the content of the expansion particles is indefinite; the solidifiable particles are prepared from a solid core and film-coated resin in a mass ratio of 100:(5-15). The solidifiable particlesare high in strength, high in temperature resistance and salt tolerance and wide in oil reservoir applicability; an immovable plug formed by the solidifiable particles has an interception function ofa screen net, the breakthrough pressure gradient of the expansion particles in cracks can be obviously improved, the expansion particles are forced to remain in the cracks to continue to give play toa water plugging effect, meanwhile, the immovable plug has a penetration capacity, water, a gel breaker and the like are allowed to pass through the immovable plug so as to remove plugging of the expansion particles, and the crack plugging has restorability. The crack plugging agent has a good water plugging effect in water plugging of the oil field.

A catalyst MnOx / ZrO2-TiO2 with thd SiO2-resistant performance for selectively catalytic reduction to NOx at low temp is proportionally prepared from titanium alkoxide, alcohol-type solvent, water, protonic acid, the soluble salt of Mn, and the soluble salt of Ar through proortional mixing, stirring until the sol becomes gel, drying, grinding and high-temp calcining. Its NO removing rate at 150 deg.C is more than 90%.

The invention provides a resource environment recovering method and equipment. The method comprises that a cloud server receives resource operation requests; the cloud server confirms that resource environment for the resource operation requests needs to be backed up according to the resource operation requests; the resource environment for the resource operation requests is backed up by the cloud server before operation indicated by the resource operation requests is executed by the cloud server; and the cloud server receives information used for recovering the resource environment, and the backed up resource environment is recovered according to the backed up resource environment and the information used for recovering the resource environment. The resource environment recovering method and the equipment can achieve restorability of the resource environment.

The invention relates to a high-power fiber laser for anhydrous cooling heat capacity. Hollow structures, heat-conducting strips, filling phase-change materials and airbags are arranged inside a substrate, wherein the heat-conducting strips adopting a deep groove structure is arranged between the hollow structures, and the resilient airbags are placed under the hollow structures; the phase-change materials in the solid state and the liquid state are different in density; when the phase-change materials change from the solid state to the liquid state in the process of heat absorbing, the volume of the phase-change materials increases, and the airbag is compressed to provide an extra volume; when the phase-change materials change from the liquid state to solid state in the process of heat releasing, the volume of phase-change materials decreases, and the airbag is expanded to compensate the volume loss; in the process of the volume changing of phase-change materials, the volume is buffered to guarantee a good contact between the phase-change materials and a heat-conducting base. When the laser is in operation, the heat is transmitted to phase-change materials through the heat-conducting strips. After reaching the phase-change temperature, the materials change in phase and absorb a large amount of heat, so as to realize the temperature control of a laser cavity and a pump device.

The invention relates to a composite rubber asphalt concrete steel bridge surface pavement structure which sequentially consists of the following structure layers from a steel bridge to a surface layer: an adhesive waterproof layer and fine particle type dense composite rubber asphalt concrete, wherein the total pavement thickness of the adhesive waterproof layer and the fine particle type dense composite rubber asphalt concrete is 6-7cm. According to the optimized design of structure combination, the balance of sliding resistance, bending resistance and high-temperature shearing resistance are mainly considered on the surface layer, the surface layer is made of a medium particle type material, the compaction, the high-temperature shearing resistance and deformation compliance are mainly considered on a lower layer, and the lower layer is made of a fine particle type material. According to the technical scheme, the composite rubber asphalt concrete steel bridge surface pavement structure has a high high-temperature property, high crack resistance and the compaction, the adhesive waterproof layer has high pull strength, and the shear translation damage to a asphalt concrete layer under the action of the vehicle load can be effectively avoided.

The invention discloses a combined shear wall with steel plates concealed in an internal prestressed tendon CFST (concrete filled steel tube) frame and a manufacturing method and belongs to the fieldof steel-concrete combined shear walls. The combined shear wall comprises CFST frame columns, prestressed tendons, steel plates and a reinforced concrete shear wall, wherein the CFST frame columns arearranged at two ends of the shear wall; the prestressed tendons are arranged in the CFST frame columns; the two CFST frame columns are connected through the steel plates; shear wall rebars are tied;tying bars penetrate through the steel plates to connect the rebars on two sides; concrete is poured; prestress is applied with a post-tensioning method, and the combined shear wall with steel platesconcealed in the internal prestressed tendon CFST frame is formed. compared with ordinary steel tube-concrete frame shear walls and steel plate shear walls, the combined shear wall has improved bearing capacity, attenuation of the bearing capacity and the rigidity is slow, the later aseismic property is stable, the shear wall has recoverability in the presence of the prestressed tendons, displacement of an overall structure is reduced, and the aseismic property is excellent; non-bonding prestressed tendon construction is convenient, and the combined shear wall can be applied to high-rise buildings or large complicated multi-storey buildings.

The invention relates to a report design method based on an extension mechanism. The method is used for storing report formats and data processing modes required to be recovered in the form of codes, so that the recoverability and the diversification of the report formats and data processing modes are realized. The method can also be used for appointing a same query extension type for different reports, so that the sharing of the report data formats and processing modes is realized.

The present invention relates to a heterojunction thin film-based remote electrical fire hazard monitoring system and a preparation method thereof. The heterojunction thin film-based remote electrical fire hazard monitoring system is composed of an europium oxide / gallium oxide heterojunction thin film chip, an ultraviolet photoelectric detection peripheral circuit, an LED indicating lamp and a network communication module. The europium oxide / gallium oxide heterojunction thin film chip comprises an europium oxide thin film, a gallium oxide thin film, a Ti / Au thin film electrode and an n-type Si substrate, the thickness of the europium oxide thin film is 100-150 nm, and the thickness of the gallium oxide thin film is 200-250 nm. The europium oxide thin film and the gallium oxide thin film forms an europium oxide / gallium oxide heterojunction, and the n-type Si substrate is used as the substrate of the gallium oxide thin film. The heterojunction thin film-based remote electrical fire hazard monitoring system of the present invention can send the fire hazard alarm information to a computer or a mobile phone terminal, thereby realizing the remote monitoring and alarm. The europium oxide / gallium oxide heterojunction thin film chip is stable in performance, high in responsivity and sensitivity, can be applied to the remote electrical fire hazard alarm and the high voltage line corona remote monitoring, and has the wide application prospect.

The application discloses a focusing method and apparatus, and a shooting device. The focusing method comprises the following steps: controlling deformation of an image sensor so that reference points in at least two imaging sub-zones of the deformed image sensor form a first relative position relation of staggered distribution along the depth direction; obtaining contrast data of sampling images of a to-be-shot object in the at least two imaging sub-zones; and determining and / or adjusting the focusing state of the image sensor at least according to the first relative position relation and the contrast data. Through the application, the speed and / or precision of determining and / or adjusting the focusing state of the image sensor can be improved.

The embodiment of the invention provides a video frame coding method and device, electronic equipment and a storage medium. The method comprises: performing high and low frequency splitting on a privacy ROI region in a video frame coding block coefficient, wherein a base layer comprises a low-frequency coefficient of the ROI region and a complete coefficient of a non-ROI region, and an enhancement layer comprises a high-frequency coefficient of the ROI region; decoding the code stream of the base layer to obtain a low-frequency coefficient comprising the ROI region in the base layer and complete coefficients of other regions except the ROI region, so that the ROI region subjected to privacy processing and a clear non-ROI region can be obtained, and since the enhancement layer code stream comprises the high-frequency coefficient of the ROI region, the clear ROI region can be obtained through decoding by using the enhancement layer code stream and the base layer code stream, so that the recoverability of the privacy region can be realized. In addition, the coefficients of the non-ROI region in the enhancement layer are all preset numerical values, coding resources can be saved, the data size after coding is small, and therefore bandwidth resources are saved.

The invention provides a disc spring soft steel energy dissipation and shock absorption device with a self-resetting function. The disc spring soft steel energy dissipation and shock absorption devicecomprises a rectangular frame, a loading control piece, a soft steel energy dissipation device and a plurality of recoverable disc spring sets which are arranged in the rectangular frame, distributedon the two sides of the soft steel energy dissipation device and arranged on the loading control piece in a sleeving manner; the soft steel energy dissipation device comprises a connecting end, the connecting end is arranged on the portion, in the rectangular frame, of the loading control piece in a sleeving manner, energy dissipation soft steel is fixed to the upper end and the lower end of theconnecting end respectively, and the energy dissipation soft steel is of a hollow closed structure; and the end, away from the connecting end, of the energy dissipation soft steel is fixedly connectedwith the rectangular frame through a clamping bolt. The disc spring soft steel energy dissipation and shock absorption device comprises a self-resetting system and an energy consumption system, can reduce residual deformation of the structure under the small shock condition, and can improve the comfort of the structure under the action of wind vibration; and the disc spring soft steel energy dissipation and shock absorption device can be used for reinforcing various types of supporting structures and joint positions of existing bridges and frame structures.

The invention relates to a multi-stage swing system for quickly connecting a prefabricated assembled pier and a bearing platform. The system mainly comprises a bottom sealing plate, an upper disc, prestressed tendons, a U-shaped energy dissipater, a lower disc and limiting angle steel. The bottom sealing plate is anchored at the bottom of the pier column; the upper disc comprises a top plate, a groove and a support plate; the lower disc comprises a ball pin, a ball pin step and a bottom plate; the groove and the ball pin are nested with each other to limit the transverse displacement of the upper disc, a first support plate is supported on the ball pin step, and the ball pin and the ball pin step bear a vertical load together; a second support plate is connected with the bottom plate through limiting angle steel to limit relative rotation of the upper disc and the lower disc; the U-shaped energy dissipater is arranged between the top plate and the bottom plate, and a steel base plate is arranged between the bottom sealing plate and the upper disc when necessary so that the U-shaped energy dissipater can be anchored and replaced; the lower disc is fixed on a bearing platform. Compared with the prior art, the multi-stage swing system has the advantages that the recovery torque is increased and the structural period is prolonged by changing the swing fulcrum, and only the U-shapedenergy dissipater needs to be replaced after vibration to facilitate quick recovery.

The invention discloses a short-circuit protection circuit, and the circuit comprises a switching tube, a turn-off holding circuit and an adjusting resistor. A grid electrode of the switching tube isconnected with a control voltage input end, wherein a source electrode is connected with one end of the adjusting resistor, and a drain electrode is used for connecting a load. A first end point of the turn-off holding circuit is connected with a grid electrode of the switching tube, a second end point is connected with a source electrode of the switching tube, and a third end point is connected with the other end of the adjusting resistor. The other end of the adjusting resistor is used for grounding or is connected with a power supply. According to the technical scheme, the short-circuit protection of load equipment can be achieved, the short-circuit protection device has the disconnection maintaining function and the power-on recoverable characteristic after short circuit occurs each time, the nanosecond-level short-circuit response speed can be achieved, the cost is low, and the service life is long.

The invention provides a boron nitride nano sheet-polyacrylic acid gel composite thermal interface material and a preparation method thereof. The thermal interface material comprises a polyacrylic acid gel matrix and a thermal conductive filling material. The polyacrylic acid gel matrix comprises trivalent iron ion-polyacrylic acid gel or modified silicon ball-polyacrylic acid gel, and the thermalconductive filling material comprises boron nitride nano sheets. The preparation method of the thermal interface material comprises the following steps: evenly mixing acrylic acid, water, and trivalent iron salts / silicon balls; adding boron nitride nano sheets, evenly mixing, stirring, carrying out reactions for 30 to 40 minutes under stirring in the presence of an initiator, and then carrying out reactions at a temperature of 33 to 37 DEG C for 40 to 48 hours in a stationary state to obtain the thermal interface material. The provided thermal interface material is a deformable and recoverable gel-like thermal interface material, has an excellent heat conduction performance, and can be tightly adhered on a surface that needs heat dissipation so that no air flows in the gap between a heating element and the surface of a radiator.

The present invention relates to one kind of nanometer intelligent temperature-controlling conducting fabric and its preparation process and application. The fabric is prepared through the following steps: adding silver or tin plating red copper wire into the material for the fabric; padding-finishing the fabric with nanometer temperature memory material and treating the fabric with fireproof coating to form protecting film. The present invention has advanced technological process and high operability, and the nanometer intelligent temperature-controlling conducting fabric has one kind of protecting film formed in the surface.

The invention relates to an optical grating agglutination alignment mechanism in a space heterodyne interferometer, which is arranged on a base plate of the interferometer, comprises a beamsplitter, optical wedge distance pieces arranged in two paths, an expanding view field prism and an optical grating distance piece, takes on an 'L' shape and is an integrated interference body preposed unit provided with two arm ends which are an X arm and a Y arm. The mechanism is characterized in that a two dimension adjusting mechanism and an angular adjustment mechanism are respectively arranged at the two arm ends of the integrated interference body preposed unit on the base plate; meanwhile, a monitoring system formed by an even light source, an imaging lens positioned on an output optical axis, aCCD photoelectric receiving device and a display; and interference image is generated by the emergent ray of the even light source through the interferometer, and the monitor image can be acquired inthe display. The mechanism is convenient for operation and strong in reliability, and can be used for monitoring the interference effect in real time.

The invention discloses a method for governing gobi by utilizing vegetal modified sand. The vegetal modified sand is paved on the surface of gobi to be governed, and is formed by dissolving a water-soluble solid organic matter in water to form a cohesive and adhesive solution, and mixing the cohesive and adhesive solution with plant seeds and sand; after moisture evaporates, the water-soluble solid organic matter can bond sand, and can be dissolved in water again after meeting water to form the cohesive and adhesive solution to bond sand. According to the invention, common sand can serve as soil; the interaction among sand grains is changed fundamentally; a particle pore structure with binding force (sticking force) is formed; materials cannot run off easily due to the cohesive and adhesive properties; the vegetal modified sand can be as stable as soil, and can store water and nutrients as soil; plants can grow directly after the vegetal modified sand is mixed with the plant seeds. Therefore, the method provides a solid condition for tree growth, and is an ideal gobi governing measure.

The invention relates to an intelligent electric spark detection alarm system based on a PN junction chip and a preparation method thereof. The system comprises a praseodymium oxide / gallium oxide PN junction chip, an ultraviolet photoelectric detection peripheral circuit, a GSM module and a buzzer, the praseodymium oxide / gallium oxide PN junction chip is connected with the ultraviolet photoelectric detection peripheral circuit, the GSM module and the buzzer are connected to the ultraviolet photoelectric detection peripheral circuit in parallel, the praseodymium oxide / gallium oxide PN junction chip comprises an n-type gallium oxide monocrystalline substrate, a p-type praseodymium oxide film arranged on the n-type gallium oxide monocrystalline substrate, and Ti / Au film electrodes, and the area of the p-type praseodymium oxide film is half of the area of the n-type gallium oxide monocrystalline substrate. According to the praseodymium oxide / gallium oxide PN junction chip, the performance is stable, the responsivity and the sensitivity are high, and the dark current is low; and according to the intelligent electric spark detection alarm system, remote alarm can be realized, the system can be applied to remote electrical fire alarm and detection of high-voltage line coronas and spectrums with specific wavelengths, and the application prospect is wide.