153results about How to "Save work" patented technology

The invention provides an automatic detection system and method of a secondary virtual loop of an intelligent transformer station. The automatic detection system comprises an automatic test system and virtual terminal simulated output subsystems, wherein the virtual terminal simulated output subsystems are disposed in secondary intelligent electronic devices. According to communication links and virtual terminal loop information in an SCD file, the automatic test system sends a test control command to spacing-layer and process-layer devices via the GOOSE internet to drive virtual terminal simulated output of the devices, response to test excitation of the devices is obtained from the MMS internet and the GOOSE internet to automatically determine a test result, and the correctness of the virtual loop is verified. According to the system and method of the invention, whether virtual terminals of point-to-point and networking ports of the devices are correctly connected can be determined needless of dismounting fibers among the devices, changing configuration of the virtual terminals or adding external testers, the debugging-verifying efficiency and correctness of the secondary virtual loop are improved, and stable and reliable operation of the secondary system of the intelligent transformer station is ensured.

The invention relates to a metal material electronic trading system with trade matching function, aiming to solve the technical problem of providing a secure and convenient metal material electronic trading method. The method comprises the following steps: the buyer and the seller register on a trading platform and are listed to apply for trades, the trading system automatically matches the buyer and the seller according to the demands of the buyer and the seller and generates electronic orders, and then the trading platform sends a command to the B2B platform of a franchised bank to complete appropriation of money for goods and defrosting of goods and sends a command to a digital storage system of a franchised storehouse to complete change of real right of the goods, thus finally closing the trades. Through the above trade flows, the buyer and the seller have no need for examining the specific conditions of the other party or costing lots of time to carry out business negotiation, but can securely, conveniently and quickly close the trades under the matching of the trading system only by proposing price expectation. The system omits most work before trading, effectively ensures trade quality, increases the trade benefits and lowers the trade cost.

The invention provides a spacecraft dynamics modeling method. The method comprises the following steps of: replacing a liquid sloshing equivalent mechanical model with an equivalent pendulum, enabling a closed loop topology structure to be equivalent to an open loop tree topology structure, defining a coordinate system at a hinge joint, defining a basic contact operator, characterizing elastic displacement of a flexible body, and performing recurrent calculation on the force and speed of the flexible body; and judging whether systematic calculation on a dynamics model is a forward dynamics modeling process or a backward dynamics modeling process, correspondingly substituting the forward dynamics modeling process or the backward dynamics modeling process, and deducing a system dynamics equation. The method provided by the invention is capable of not only meeting the precise modeling requirement, but also simplifying the design process, saving a lot of workload, accelerating the spacecraft development period, realizing high-precision high-efficiency dynamics modeling of a large flexible cable antenna spacecraft, achieving modeling of a flexible multi-body system capable of calculating closed loop spacecraft configuration in a simplest mode, and saving a lot of tedious and hard works.

The invention provides a non-contact induction charging device comprising a current transformer, a bidirectional triode thyristor, an overvoltage protection circuit, a rectifying circuit, a BUCK circuit, a lithium battery pack, a voltage feedback control circuit and a voltage current feedback circuit, wherein a circular ring is formed by two C-shaped iron cores of the current transformer and is sleeved on a transmission line; the output end of the current transformer is connected with a relay matrix and is used for controlling the number of turns of a primary coil of the current transformer; an output of the relay matrix is connected with the bidirectional triode thyristor and is connected with the voltage feedback control circuit and the voltage current feedback circuit at the same time; the output end of the rectifying circuit is connected with the bidirectional triode thyristor through a voltage feedback control signal; and an input of the BUCK circuit is the output of the rectifying circuit and the output of the BUCK circuit is directly connected with the lithium battery pack; and the lithium battery pack is connected with the BUCK circuit through a voltage and current feedback circuit. According to the invention, when the device is used for charging a robot battery, the frequent online and offline are avoided, so that the practical applicability of the robot can be enhanced and the inspection frequency of the transmission line is improved.

This invention discloses one channel rock loose deformation measurement tube drilling extending meter, which comprises extending bar and at least one layer of extending tube on hollow cover, wherein, extending bar and tube go into measurement hole with one end fixed with drug pack relatively to each measurement point position; the extending bar and tube other end extends to measurement hole fixed with measurement probe; the measurement head circle and extending bar are isolated with certain distance and the measurement head outer end is set with relative plug hole to end tube wall.

The invention provides a tube truss manufacture process which comprises the steps as follows: blanking of steel tubes, positioning of intersecting points of tube fitting, welding of tube fitting, calibrating of members, pre-assembling, and disassembling of the pre-assembled truss, wherein all the manufacturing and processing links are carried out in sequence. The manufacture process has the advantages as follows: the assembly precisions of intersecting ends and intersecting holes are high; the size deviation is small; a truss body can be assembled quickly; the workload of calibration is small; formation of physical appearance is good; workload and time for polishing are greatly reduced; the quality of construction and formation can be guaranteed; smoothness and progression of all manufacture links are guaranteed; total construction period is guaranteed; material cost of manufacturing of the tube truss can be saved; inputs of manpower and goods and materials are saved; and economical effects of production are improved.

The invention provides a continuous multi-layer full-automatic energy-saving curing kiln. A plurality of raceways arranged in an matrix shape are positioned in a kiln body so as to form a layer structure; left and right sides of the kiln body are connected with a left lift and a right lift; the left lift is connected with a brick-receiving rolling plate-moving carriage on which a supporting plate is arranged; the right lift is connected with a stacker through a brick-delivering rolling plate-moving carriage; a brick stacking bracket used for stacking bricks is arranged on a bottom plate of the stacker; and a plate grabbing mechanical arm is arranged above the brick-delivering rolling plate-moving carriage; therefore, the brick-receiving rolling plate-moving carriage, the left lift, the kiln body, the right lift, the brick-delivering rolling plate-moving carriage and the stacker are connected into an automatic production line. The continuous multi-layer full-automatic energy-saving curing kiln integrates functions of transfer, curing, deliver, storage and the like, continuously and automatically completes the curing of bricks, can greatly save energy, and is very practical.

The invention relates to a mobile phone polaroid laminating machine capable of reliably laminating a polaroid. A polaroid loading mechanism comprises a loading platform longitudinally lifting mechanism, a loading platform station switching mechanism installed on the loading platform longitudinally lifting mechanism and a polaroid loading platform installed on the loading platform station switching mechanism; the polaroid loading platform comprises a laminated polaroid transferring substrate and a laminated polaroid transferring hinged side panel which is installed on the loading platform station switching mechanism, the laminated polaroid transferring substrate is hinged to the bottom end of the laminated polaroid transferring hinged side panel, the side, opposite to the hinged point, of the laminated polaroid transferring substrate can longitudinally rotate around the laminated polaroid transferring hinged side panel, the laminated polaroid transferring substrate is connected with a laminated polaroid transferring cylinder which drives one side edge of the laminated polaroid transferring substrate to rotate, a polaroid aligning mechanism is installed on the laminated polaroid transferring substrate, a vacuum adsorption plate which can absorb and fix the polaroid is installed at the bottom of the laminated polaroid transferring substrate in an attached mode, and a high-speed camera is arranged on the side edge of a vacuum adsorption seat which is fixed through a glass substrate. The mobile phone polaroid laminating machine capable of reliably laminating the polaroid has the advantages of being reasonable in polaroid laminating action and good in polaroid laminating quality.

The invention relates to an automatic loading and unloading mechanism of a hydraulic machine, wherein a loading stand and an unloading stand are respectively arranged at two sides of the hydraulic machine, an up-down cylinder is arranged at the upper part of the loading stand, a retainer plate is parallel to the middle part of a frame body, and a gear motor is arranged at the lower end of the retainer plate; the upper side of the up-down cylinder is connected with a suction tray frame sliding plate which is connected with a guide rod sliding rail of a frame body at the lateral end in a slidingway and connected with a drag chain in series; and a suction tray is respectively arranged at the rear side of the up-down cylinder and the frame body thereof. In the invention, the material productto be processes just needs to be put on the retainer plate at will and is conveyed into the hydraulic machine under the control of a power switch of a pneumatic motor and an induction switch of a stepping motor by adopting a way of synchronously and translationally loading and unloading by the automatic ascending and descending matching of the retainer plate, and the product to be processed is moved to a specific position by a guiding device, thereby the product can be put in and taken out quickly and accurately; and the invention has the unmatched advantages any conveying machines or mechanical arms can not reach, can effectively avoid potential safety hazards and improves the production efficiency in the packaging process of paper boxes.

The invention provides an automatic monitoring method and system for open source component vulnerabilities. The automatic monitoring method comprises the following steps: scheduling crawlers to searchand capture data newly published by bug disclosure platforms at home and abroad; recording the grabbed data and updating the grabbed data to a local open source component vulnerability library; scheduling an open source component used by the fingerprint scanner detection system and service, recording a scanning result and updating the scanning result to an open source component database; matchingthe grabbed data with information in an open source component database to screen components with risks at present; and performing early warning on related responsible persons by a scheduling component vulnerability feedback recording mechanism. The automatic monitoring method can realize Automatic vulnerability early warning tracking and security construction, so that security personnel only needto pay attention to screened vulnerabilities related to products and companies. Therefore, the extra-large workload is saved, and the security vulnerability discovery and tracking efficiency is improved; the vulnerability tracking range is expanded; and the latest burst vulnerability can be responded within 24 hours, so that the company network security response timeliness is improved.

The invention relates to a hydraulic bracket assembling and disassembling machine with supporting upright columns, which belongs to the technical field of equipment for disassembling a hydraulic bracket on a coal mine fully-mechanized working surface, provides an assembling and disassembling machine which can conveniently move and assist to disassemble and transport the hydraulic bracket, and adopts the scheme that a rotating plate is installed on a vehicle body, the outer end of the rotating plate is articulated with a lifting plate, the cylinder body of an angle-modulated oil cylinder is installed at the lower part of the outer end of the rotating plate, a piston rod end head is connected with the lower part of the lifting plate, the cylinder body of a rotary oil cylinder is installed at the lower part of the vehicle body, the piston rod end of the rotary oil cylinder is movably connected with one end of a crank, the other end of the crank is fixed at the middle position of the bottom of the rotating plate, two supporting upright columns are together vertically installed at one side of the vehicle body, a supporting oil cylinder is respectively installed at both ends of the two supporting upright columns, and a pulley is installed on the vehicle body between the two supporting upright columns; and the invention is applied to the technical field of mine vehicles.

The invention discloses a hydraulic bracket assembling machine, which belongs to the technical field of equipment for assembling a hydraulic bracket in a coal mine. The invention adopts the scheme that: a pull ring is fixed at one end of a vehicle body; the other end of the vehicle body is hinged with a lifting plate; the lower part of the lifting plate is provided with an angle regulating oil cylinder, the cylinder body of the angle regulating oil cylinder is arranged on the vehicle body below the lifting plate, and a piston rod is connected with the lower part of the lifting plate; and a turntable is positioned on the middle part of the vehicle body, the cylinder body of a rotary oil cylinder is arranged on the lower part of the vehicle body, the end of a piston rod of the rotary oil cylinder is connected with the bottom of the turntable through a crank, a plurality of rollers are arranged on the turntable, and a pulley is arranged on the lower part of the vehicle body. The hydraulic bracket assembling machine greatly accelerates the assembly of the hydraulic bracket, saves the assembling time and reduces the labor intensity of workers.

The invention discloses a device and method for measuring the blood flow of blood vessels. The method includes the steps that a light source, a light splitting module, a reference arm module, a sample arm module, a detection module and a control system are arranged on a light path; the sample arm module mainly comprises a scanning unit and a rotatable light path transverse movement device; detection light is obtained after light of the light source passes through the light splitting module, wherein the main light of the detection light is located on a rotating shaft of the scanning unit all the time; the detection light is scanned by the scanning unit to be reflected to the light path transverse movement device, when the light path transverse movement device is located at a first position and a second position, the eye ground blood vessels are scanned, a first phase signal and a second phase signal of the measured blood vessels are obtained, and finally the blood flowing speed and the blood flow of single blood vessels and the blood flow of all the blood vessels nearby an optic disk are solved according to formulas. By means of the device and method, the high-frequency background Doppler effect of collected original Doppler images of the blood vessels is avoided, and extra work and errors caused by removing the high-frequency background Doppler effect are eliminated.

The invention relates to the technical field of logistic equipment, in particular to a cigarette diversion and supplying device. The cigarette diversion and supplying device comprises a diversion cigarette temporary storage channel, a diversion cigarette shifting device, two cigarette releasing devices and two buffering storage cigarette channels; the diversion cigarette temporary storage channel consists of a cigarette temporary storage channel to be divided, a diversion cigarette temporary storage channel A and a diversion cigarette temporary storage channel B; the cigarette temporary storage channel to be divided is provided with an upper cigarette supplying passage joint and a side cigarette supplying passage joint; the diversion cigarette shifting device consists of a cylinder body, a piston rod and a cigarette shifting plate and is arranged on the diversion cigarette temporary storage channel, the cigarette shifting plate is arranged in the diversion cigarette temporary storage channel; the two cigarette releasing devices are respectively arranged at cigarette outlets of the diversion cigarette temporary storage channel A and B and connected with the two buffering storage cigarette channels; the cigarette outlets are joints of a sorting mechanism; and photoelectric sensors are arranged in the cigarette temporary storage channel to be divided, the diversion cigarette temporary storage channel A and B, the two buffering storage cigarette channels and cigarette outlets of the two buffering storage cigarette channels. According to the device, a set of cigarette feeding passage supplys cigarettes to two sets of sorting mechanisms, so that the efficiency is doubled, the cost is lowered, the structure is simplified, and the energy resources and field can be saved.

The invention provides a variable-temperature test system and test method for VOC (volatile organic compound) diffusion performance of automobile parts and materials. According to the method, a one-cubic-meter environmental chamber is adopted for closed state test, a temperature influence result can be obtained through one-time test by continuously varying test temperature of the same test sample, and the VOC diffusion performance of a material at different temperatures can be represented very well. In order to cooperate with the closed variable-temperature dynamic test process, a traditional environmental chamber test system is improved and innovated, and a material surface temperature test technology, a closed chamber sampling and air supplementing system and the like are added.

The invention discloses a KTV song demanding method and system, a KTV song demanding terminal and a KTV song management system. The KTV song demanding system comprises the KTV song demanding terminal, a KTV song demanding control system and the KTV song management system. The KTV song demanding terminal is used for generating a two-dimensional code carrying a WEB page link website of the KTV song demanding control system and multiple mobile terminals in a KTV balcony can scan the two-dimensional code to be linked to and skip to a WEB page of the KTV song demanding control system. The KTV song demanding control system is used for accepting song demanding tasks submitted by users on the WEB page of the KTV song demanding control system and sending a song demanding command to the KTV song management system. The KTV song management system is used for executing song demanding operation, updating song demanding state information in a KTV song playing list, sending the updated song demanding state information back to the KTV song demanding control system and triggering the mobile terminals submitting song demanding requests to synchronously update and display the song demanding state on a WEB page of the KTV song management system.

The invention discloses an electing method for a side span overhang-middle span cable-stayed three-tower self-anchored type combination suspension bridge, which belongs to the erection field of the suspension bridge. In order to solve the problem of safety risk existing in the erection process of the existing side span overhang-middle span cable-stayed three-tower self-anchored type combination suspension bridge and in a temporary consolidation dismantling and horizontal force conversion process, the electing method comprises the following steps of: (1) forming a cable-stayed bridge of a middle tower and a girder suspended by a side tower; (2) closing the girder; (3) erecting a side tower cable lifting system; (4) dismantling a suspension section support; (5) adjusting a cable-stayed backstay, a suspension cable and a cable-stayed bridge; and (6) finishing the bridge. In the electing method, the construction working procedure of construction and dismantling of the temporary consolidation between the side tower and the girder is cancelled and the construction working procedure of ''side tower cable lifting system erection'' is carried out after all closure openings of are closed, thereby shortening the construction period, saving material consumption and cost of machinery one-shift and avoiding security caused by removing the temporary consolidation bearing strong horizontal force.

The invention relates to a mechanical part cleaning device, in particular to a cleaning machine for various types of bearings. A spindle motor is fixed on a support fixing plate at the bottom of a machine box and connected with a rotary shaft in a rotation manner through a belt, the rotary shaft is fixed at the center of a concentric clamp, and a main bevel gear is arranged in the concentric clamp, and the upper surface of the main bevel gear is provided with an Archimedes thread meshed with a fluted disc at the bottom of a fastening clamp; the side of the main bevel gear is provided with teeth meshed with a bevel pinion; combined with high-pressure spraying and a brush device, the cleaning machine is good in cleaning effect, high in cleanliness and identical in cleanliness of all workpieces; no matter the bearings to be cleaned are large or small and simple or complicated, single bearing or a batch of bearings are cleaned,or the bearings to be cleaned are on an automatic assembly line, the cleaning machine can realize uniform cleanliness incomparable to a manual cleaning method and is applicable to bearing plants, maintenance shops and technical departments.

The present invention provides a key consultation method and device for user' access to a WLAN. The method includes the following steps that: a key negotiation request is sent to a target device which is accessed to the WLAN, wherein the target device is a wireless access point (AP) or a key negotiation server connected with the AP; a response message for responding to the key negotiation request is received from the target device, wherein the response message carries the public key of the target device accessed to the WLAN; after the response message is received, a temporary key is randomly generated, the temporary key is encrypted by using the public key, so that a first ciphertext can be generated, and the first ciphertext is sent to the target device, wherein the temporary key is used for the password of a WLAN terminal to access to a WLAN environment; processing is carried out according to the temporary key, so that a first processing numerical value is obtained; a second processing numerical value from the target device is obtained, wherein the second processing numerical value is a numerical value which is obtained by the target device by performing processing according to the temporary key in the first ciphertext; and if the first processing numerical value is matched with the obtained second processing numerical value, confirmation information indicating a key negotiation success is sent to the target device.

The invention relates to a metal material electronic trading system with trade clicking function, aiming to solve the technical problem of providing a secure and convenient metal material electronic trading method. The method comprises the following steps: the buyer and the seller register on a trading platform and are listed to apply for trades, the trading system clicks the trades according to the demands of the buyer and generates electronic orders, and then the trading platform sends a command to the B2B platform of a franchised bank to complete appropriation of money for goods and defrosting of goods and sends a command to a digital storage system of a franchised storehouse to complete change of real right of the goods, thus finally closing the trades. Through the above trade flows, the buyer and the seller have no need for examining the specific conditions of the other party or costing lots of time to carry out business negotiation, but can know the actual inventory condition of the metal materials needing to be purchased at any time and securely, conveniently and quickly close the trades only by determining clicking on the electronic trading platform according to the demands. The system omits most work before trading, effectively ensures trade quality, lowers the trade cost and increases the trading efficiency.

The invention relates to a biosafety cabinet capable of prompting life of an ultraviolet lamp. A control panel of the biosafety cabinet is provided with a life preset device, a time processing device and an alarming device. The life preset device is used for presetting a service life of the ultraviolet lamp; and the time processing device is used for recording cumulative operation time of the ultraviolet lamp and calculating the residual service life of the ultraviolet lamp according to a formula: the service life of the ultraviolet lamp=(the preset life-the cumulative operation time) / the preset life*100%. When the residual service life of the ultraviolet lamp is less than 10%, the alarming device sends out an alarming signal to prompt a user to replace the ultraviolet lamp. The provided biosafety cabinet capable of prompting the residual service life of the ultraviolet lamp is simple in device and low in cost, and can greatly save work load of the user to check the ultraviolet lamp.

The invention relates to the technical field of an elevator. In order to solve the problems of high wiring cost and great wiring difficulty of a traditional elevator calling system, an appointment calling function is based on a wireless calling function, and the problem that the elevator waiting time of people with special tasks is too long is solved. The invention adopts the following technical scheme: in an elevator calling system based on a Wi-Fi (wireless fidelity) wireless network, an elevator inner selection plate in a car, an elevator outer calling plate of each floor and a core CPU (central processing unit) of a handheld wireless calling device are all connected with a Wi-Fi module through a serial port and used for receiving or sending data; the elevator inner selection plate and the elevator outer calling plates communicate with an elevator core controller in the Wi-Fi network; the handheld wireless calling device firstly needs to transfer a signal to the Internet through the Wi-Fi network, and a wireless AP (access point) / router receives the signal and transfers the signal to the elevator core controller; and the elevator core controller is connected with the wireless AP / router by a network cable. The system provided by the invention is mainly used for designing and manufacturing an elevator.

The invention discloses a rock mass quality classification and dynamic parameter estimation method based on a blasting vibration test. The rock mass quality classification and dynamic parameter estimation method comprises the following steps: distributing test points according to an ordinary blasting vibration test, acquiring the time of a wave P and a wave S for arriving each test point by virtue of a multi-channel data acquisition unit, and also calculating the propagation velocity of the wave P and the wave S between two test points by virtue of a time difference of the wave P and the wave S for arriving the test points and a distance between the test points to ensure that the rock mass quality between the two test points can be judged and a dynamic elastic modulus of a rock mass between the two test points can be calculated according to the propagation velocity. The rock mass quality classification and dynamic parameter estimation method disclosed by the invention is simple to operate, and can be taken as an effective supplement of conventional geological exploration so as to ensure that a lot of time and workload can be saved; and the rock mass quality classification and dynamic parameter estimation method is suitable for the geological exploration of underground cavities in a blasting excavation process, and is also suitable for the geological exploration of side slopes.

The invention, which belongs to the field of the network content security technology, discloses a method and system for access controlling, and equipment. The method comprises the following steps that: a web address sent by a terminal is received; credibility of a domain name corresponding to the web address is determined; and the credibility is sent to the terminal, so that the web address access is realized when the terminal determines that the credibility is not less than a preset threshold value. Therefore, the terminal can carry out security early warning on an unknown web address effectively and there is no need for a secure and complicated virus database and firewall software to carry out security early warning on the unknown web address, thereby reducing the load of the terminal and saving the cost and the workload for installation and upgrading of the virus database and the firewall software. In addition, because the threshold value is preset by the terminal, the individuation demand of the user can be satisfied, thereby improving the user experience.

The invention discloses an analysis method for fatigue crack propagation based on a magnesium alloy electron beam welded sample, and belongs to the technical field of mechanical properties of magnesium alloy materials. The analysis method is characterized by being a process of expanding a test piece under action of fatigue load for a magnesium alloy containing precracks; inner energy of the test piece is increased as a result of an elasticoplastic deformation effect; and finally, energy is released when the cracks propagate, so as to obtain a relation curve of an acoustic emission signal inside the test piece and circulating times; and an expansion condition of a fatigue test piece is determined by analyzing curve shape characteristics, so that a critical value that the magnesium alloy enters an unstable propagation stage is obtained. The method does not require experiment personnel to observe the test piece all the time, and has the advantages of being convenient, quick, accurate and the like.

The invention discloses a method and system for playing a low-resolution video of a mobile device. The method comprises the following steps: encoding video signals of an original video file by a CPU (Central Processing Unit) and transmitting encoded signals to a display screen driver IC (Integrated Circuit), wherein the data of the encoded signals and the data of the video signals of the original video file are equivalent to each other; decoding the received signals through the display screen driver IC and amplifying the decoded signals to form video signals suitable for the resolution of a display screen; and through the display screen driver IC, transmitting the amplified video signals to the display screen to play. The system comprises a video encoding-transmitting module, a video decoding-amplifying module and a video playing module. According to the method and the system, the data equivalent to the data of the low-resolution video file are transmitted rather than being amplified, so that the roles of lowering the overall power consumption and the signal radiation are played.

The invention discloses a crushing and returning machine. the crushing and returning machine includes a straw crushing machine, a working main body and a power device; the straw crushing machine is arranged in the center of the inner part of the working main body; fixing supports are arranged at the upper side and the lower side of the straw crushing machine, respectively; a power extraction device is arranged over the left side of the straw crushing machine; an attraction channel is arranged the left lower part of the power extraction device; an attraction fan is arranged at the right side of the straw crushing machine; a working case is arranged at the right side over an external part of the working main body; the power device is arranged in the upper part of the inner part of the working case; a numerical control execution element is arranged on the left lower part of the power device; an electricity energy storage device is arranged at the right side of the power device; a rolling track is arranged under the external part of the working main body; and a straw cutting device is arranged under the attraction channel. The crushing and returning machine is easy and simple to use, can quickly crush straw and pave the crushed straw in a farmland, and is improved in working efficiency.

The invention provides a thermostat diagnosis method. Compared with the situation that an existing engine thermal management system possibly has certain defects in design for a vehicle of which the temperature rise of a second-channel water temperature sensor is obvious before a thermostat is started, under the conditions of not changing the structure of the existing thermal management system andnot increasing the hardware cost, according to the diagnosis method, the thermostat is subjected to diagnosis by calculating the difference between the one-channel water temperature and the two-channel water temperature, so that the reliability of the diagnosis is improved, the cost and workload for changing an engine thermal management system are saved, and the applicability to different engine heat management systems is high; besides, compared with the situation that installation is inconvenient and the installation cost is high due to the fact that an existing diagnosis strategy limits thesecond-channel water temperature sensor to be arranged on a radiator, according to the thermostat diagnosis method, the second-channel water temperature sensor only needs to be arranged at the position, adjacent to the thermostat, of a second cooling pipeline, so that installation is convenient, and the cost is low.

The invention provides a PLL automatic test circuit, and the circuit comprises a frequency allocation memory unit, a frequency allocation unit, a pathway selection unit, a lock detection unit, a counter unit, a comparison unit and a desired value memory unit; the frequency allocation memory unit, the frequency allocation unit and the pathway selection unit are connected with the PLL in sequence, and the frequency allocation unit and the pathway selection unit are connected with a test mode effective state bit signal; the pathway selection unit is connected with an allocation control signal under a function mode; the lock detection unit, the PLL, the counter unit, the comparison unit and the desired value memory unit are connected in sequence; the lock detection unit is also connected with the counter unit and the comparison unit; and the PLL and the counter unit are connected with a reference clock signal. According to the invention, the circuit and method can perform a full spectrum band covering test on the PLL in chip CP test phase, can judge if the function of the PLL is correct through automatic calculation and can directly get the result.