30results about How to "No false triggers" patented technology

The invention discloses a reactive continuous compensation control method for a thyristor switched filter and belongs to the technical field of application combining power electronics and electric energy quality control, so as to solve the problem that reactive over compensation is likely to happen due to discontinuous reactive compensation of the thyristor switched filter in the prior art. The method of the invention adopts switching of the thyristor switched filter to carry out reactive compensation control on the system, and the system is provided with three fifth harmonic filtering channels TSF1, TFS2 and TSF3 and a seventh harmonic filtering channel TSF4. The method comprises the following steps: three phases of voltage signals ua, ub and uc and three phases of current signals ia, ib and ic are acquired; after the signals are conditioned, the signals are sent to a DSP control chip; in the DSP control chip, seventh harmonic current and fifth harmonic current are acquired; and the switching state of each harmonic filtering channel is determined.

The invention discloses a control system of an AC motor. The control system of the AC motor comprises a power conversion module, an overheating and overcurrent protection switch, a zero-passage signal detecting module, a relay control module, a silicon-controlled module and a master control module. The master control module firstly switches on the relay control module at a power supply zero point, and due to the fact that no voltage exists between both ends of a relay in the relay control module at the moment, the relay can avoid sparking; the master control module can perform time delay treatment when detecting the power supply zero point to switch on the silicon-controlled module and to start the motor; if the motor needs to be stopped, the master control module can firstly control the silicon-controlled module to stop working to cut off the live wire circuit of the motor, and then stop the working of the relay control module, at the moment, high voltages at both ends of the relay can be cut off, and meanwhile, sparking during the cut-off moment can also be avoided; the relay control module and the silicon-controlled control module together controls the starting operation of the motor to avoid spurious triggering.

The invention relates to the technical field of electric lifting platforms, in particular to an electric lifting platform control method capable of realizing rollback when meeting resistance, The electric lifting platform control method comprises the following steps: S1, detecting the state of the lifting platform at a time interval of X, if the lifting platform is in the static state, skipping toS2, and if the lifting platform is in the moving state, skipping to S3; S2, reading the magnitude of angular velocity and / or acceleration magnitude of a multi-axis motion sensor, taking the magnitudeof angular velocity and / or acceleration magnitude of the multi-axis motion sensor as reference values, and then returning to S1; and S3, reading the magnitude of angular velocity and / or accelerationmagnitude of the multi-axis motion sensor, comparing the read values with the reference values, if the changing value after comparison exceeds the set threshold value, judging that the platform meetsresistance, controlling the lifting platform to stop or carry out rollback action, if the changing value after comparison does not exceed the set threshold value, judging that the lifting platform does not meet resistance, and returning to S1. The false triggering rate of the lifting platform controlled through the control method is lower and the judgement precision rate is higher.

An LED light string control circuit is used for controlling multiple lines of LED light strings. The LED light string control circuit comprises a charging circuit, a boost circuit, a trigger circuit and a control circuit. According to the LED light string control circuit, when light conditions are good, the output voltage of a solar cell panel is made to achieve the effect that a transistor is made to be in an on state, a VOUT pin of a boost chip has no voltage output, and the control circuit and an LED light string are out of power and do not work; when the light conditions fade away gradually until the output voltage of the solar cell panel cannot maintain the transistor to be in the on state, the transistor enters an off state, and the VOUT pin of the boost chip outputs constant voltages to supply power for the control circuit and the LED lamp string. Therefore, the LED light string control circuit can automatically adjust charging time and the lighting time of the LED light string according to the light conditions, due to the fact that the output voltage of the solar cell panel is slow in changing, flexibility is not strong, false triggering cannot be generated, and control over the LED light string is relatively stable.

The invention discloses a man-machine interaction ring by capacitance touch. The man-machine interaction ring comprises a ring body, a first capacitance touch key, a second capacitance touch key, a third capacitance touch key, a touch sensing chip, a main control chip and a wireless data transmission module, the first capacitance touch key, the second capacitance touch key and the third capacitance touch key are arranged on the surface of the ring body, the touch sensing chip, the main control chip and the wireless data transmission module are arranged in the ring body, signal output ends of the first capacitance touch key, the second capacitance touch key and the third capacitance touch key are connected with a signal input end of the touch sensing chip, a signal output end of the touch sensing chip is connected with a signal input end of the main control chip, and a signal output end of the main control chip is connected with a signal input end of the wireless data transmission module. The invention further discloses an interaction method of the man-machine interaction ring by capacitance touch. The man-machine interaction ring completely solves false triggering problems and adapts ring shells of different sizes, the size of an inner circuit board can be adjusted, and low-cost and mass production is achieved.

The invention discloses a gas cylinder type pressure-stabilizing dual-mode oxygen supply device. The gas cylinder type pressure-stabilizing dual-mode oxygen supply device comprises a gas cylinder, a nasal oxygen tube and an integrated valve mounted on the gas cylinder, wherein a nasal suction joint on the nasal oxygen tube is inserted into a nasal cavity of a user; a gas outlet outer joint and a gas suction outer joint of the integrated valve are connected with a gas inlet of the nasal oxygen tube; the integrated valve comprises a valve body, a valve cover, a filling module, a flow regulatingmodule and a pulse oxygen supply module, wherein the filling module, the flow regulating module and the pulse oxygen supply module are mounted on the valve body and the valve cover; oxygen in the gascylinder passes through the filling module and the flow regulating module and then is output by the pulse oxygen supply module; the pulse oxygen supply module comprises a gas inlet unit, a gas outletunit and a gas suction unit; and the gas inlet unit comprises a sixth gas channel and a seventh gas channel which are used for feeding gas through the same gas inlet source. According to the gas cylinder type pressure-stabilizing dual-mode oxygen supply device, all mechanical parts are adopted to realize continuous and pulse dual-mode oxygen supply, and a pressure stabilizing module and the filling module are integrated inside, so that the device structure and gas guide tube connection are simplified, and therefore, use of the user is convenient.

The invention discloses a counter for the number of basketball goals, which belongs to the technical field of sports equipment and includes a counter, a trigger lever, and a fixing device. It is characterized in that: the counter is a mechanical counter, and one end of the trigger lever is connected to the input shaft of the counter. The other end points to the center of the hoop, and the fixing device is used to fix the mechanical counter on the lower edge of the hoop, and the counter can be triggered to count when the basketball enters the hoop. The present invention has a simple structure, and because it adopts a purely mechanical structure, it does not need a power supply and is convenient for outdoor use. The trigger lever of the present invention is located under the hoop, and it can only be triggered when the basketballs all enter the hoop. Since the present invention is located at the lower end of the hoop, the No false triggers are generated when shots are missed.

The present invention provides an eye movement interaction method for a virtual reality and / or augmented reality head-mounted device, a head-mounted device, and a computer readable medium, the eye movement interaction method comprising: displaying a virtual reality scene on a screen without displaying a menu; tracking the sight of the user; judging whether the user performs a menu triggering eventthrough eye movement or not according to the tracked sight line; and under the condition that the user performs the menu triggering event, displaying the menu. The eye movement interaction method canalso comprise the following steps: judging whether a user performs a menu selection event or not according to the tracked sight line under the condition of displaying a menu; and under the conditionof determining that the user performs the menu selection event, executing a command corresponding to the selected menu item, and hiding the menu. The menu in the eye movement interaction method of thehead-mounted device is invisible at ordinary times, the view of the user is not occupied, the menu appears only when the user wants to call out the menu, and the effectiveness, accuracy and robustness of the menu triggering technology and the selection technology are verified through experiments.

The present invention relates to an automatic induction trigger method based on barcode edge segmentation and its system, which acquires a frame of barcode image in YUV coding mode, calculates the difference between its average gray value and the average gray value of the decoded image of the previous frame, and Compared with the first threshold T1, if the difference does not exceed the first threshold T1, decoding will not be triggered, otherwise, the current image will be further processed for edge segmentation, and the white pixels after the barcode edge segmentation processing between the current image and the previous image will be calculated The ratio of the absolute value of the difference between the numbers to the current image, if the ratio does not exceed the third threshold T3, the automatic sensing is not triggered; otherwise, the automatic sensing is triggered to perform the decoding operation.

The present invention discloses a deuterium lamp lighting detection and identification device, and it includes a signal sampling circuit 1,high-low conversion circuit 2, trigger circuit 3, Display Circuit 4, when deuterium lamp was lit, voltage signal obtained by sampling circuit makes electric level output by high-low level conversion circuit high-low transform through the trigger circuit, a computer control system would receive the signal, and could automatically judge whether deuterium lamps has been lit. The display circuit would send out the display signal which could be manually judged. The sampled signals of this invention would not be affected by the interference of outside light, and the detection signal is stable. Error trigger would not happen. This invention uses the resistance as the signal sampling devices, so the installation position of sampling devices would be unrestricted and would be free from the impact of UV light, so it would have long service life.

The invention is a self-adapting judging method for capacitance keys, able to judge whether the capacitance keys enter or exit keying state, and comprising the steps of: filtering the detected signal; based on initialization values, obtaining key-free reference baselines in initial state; based on experience values, obtaining noise baselines and key baselines in initial state; by comparing the noise and keying baselines with the filtered detected signal, judging whether the keys enter or exit the keying state; self-adaptively regulating the key-free reference baselines, noise baselines and key baselines.

The invention discloses a rechargeable, sensitivity-adjustable and high-sensitivity handheld metal detector. The metal detector comprises a Seiler oscillation module, a double voltage rectification and filtering module, a sensitivity adjustment and DC comparator module, and a lithium battery, wherein the Seiler oscillation module outputs a detection signal to the double voltage rectification and filtering module; the double voltage rectification and filtering module outputs a signal after rectification and filtering to the sensitivity adjustment and DC comparator module; and the lithium battery is used for supplying power. The metal detector adopts a unique circuit design, such that a user can adjust the sensitivity in a wide range easily, so as to adapt to various usage scenarios. In cases where high sensitivity is required, the highest sensitivity of the instrument (without causing spurious triggering) can be simply and directly adjusted to. The metal detector adopts the lithium battery and the low power consumption design, the built-in lithium battery can be fully charged in only two hours, and the metal detector can be continuously used for more than 60 hours after the lithiumbattery is fully charged.

Eye movement interaction method for virtual reality and / or augmented reality head-mounted device, head-mounted device, computer readable medium, eye movement interaction method comprising: displaying a virtual reality scene on a screen without displaying a menu; tracking a user line of sight; according to the tracked line of sight, determine whether the user has performed a menu trigger event through eye movement; if the user has performed a menu trigger event, display the menu. The eye movement interaction method may also include: in the case of displaying the menu, judging whether the user has performed a menu selection event according to the tracked line of sight; in the case of determining that the user has performed a menu selection event, executing a command corresponding to the selected menu item, and Hide menu. The menu in the eye movement interaction method of the head-mounted device is usually invisible, that is, it will not occupy the user's field of vision, and it will only appear when the user wants to call out the menu. Experiments have verified the effectiveness of the menu trigger technology and selection technology. performance, accuracy and robustness.

The invention discloses a flow-adjustable continuous and pulsed dual-mode oxygen supply module. The module comprises a flow adjusting unit, an air inlet unit, an air outlet unit and an air suction unit. The flow adjusting unit comprises a valve body and a check ring, the valve body synchronously rotates around a valve rod, a plurality of throttling holes and a bypass hole are formed in the valve body, a first air channel corresponding to the throttling holes is formed in a decompression chamber cover plate, and the first air channel and a second air channel communicate with an air inlet sourcethrough the throttling holes and the bypass hole respectively. The air outlet unit comprises an air outlet outer joint, an air outlet valve plate and an air outlet cavity which are arranged on the valve body. The air suction unit comprises an air suction outer joint, an air suction valve plate and an air suction cavity which are arranged on a valve cover, an air inlet convex nozzle communicatingwith the air outlet cavity is arranged on the air suction valve plate, and an air inlet diaphragm used for opening and closing the air inlet convex nozzle is arranged above the air inlet convex nozzle. According to the module, pure mechanical parts are adopted to realize oxygen supply in pulsed and the continuous modes, the flow is adjustable, power supply is not needed in use, and requirements ofspecial occasions are met.

An LED light string control circuit is used for controlling multiple lines of LED light strings. The LED light string control circuit comprises a charging circuit, a boost circuit, a trigger circuit and a control circuit. According to the LED light string control circuit, when light conditions are good, the output voltage of a solar cell panel is made to achieve the effect that a transistor is made to be in an on state, a VOUT pin of a boost chip has no voltage output, and the control circuit and an LED light string are out of power and do not work; when the light conditions fade away gradually until the output voltage of the solar cell panel cannot maintain the transistor to be in the on state, the transistor enters an off state, and the VOUT pin of the boost chip outputs constant voltages to supply power for the control circuit and the LED lamp string. Therefore, the LED light string control circuit can automatically adjust charging time and the lighting time of the LED light string according to the light conditions, due to the fact that the output voltage of the solar cell panel is slow in changing, flexibility is not strong, false triggering cannot be generated, and control over the LED light string is relatively stable.

The invention provides an amphibious key based on an electromagnetic induction principle. The amphibious key comprises a permanent magnet sheet stress column, a permanent magnet sheet, a permanent magnet sheet cover plate, an arc-shaped sliding groove, an upper nut, an upper gasket, a winding magnetic core column, a cylindrical permanent magnet, an induction coil, a permanent magnet coil bin and asignal contact point. The opposite surfaces of the permanent magnet sheet and the cylindrical permanent magnet are the same in magnetic polarity, the permanent magnet sheet and the permanent magnet sheet are in a suspension state due to the repulsion effect between the cylindrical permanent magnet and the permanent magnet sheet, and the repulsion effect between the same poles is restored to the original state after the key is pressed down; four operations of pressing, bouncing, long pressing and short pressing of the key can be judged by utilizing the positive and negative polarities of the key output signal and the conversion time interval between the positive and negative polarities; certain gaps are reserved among the three groove-shaped connecting pieces, when the key is pressed down,water in the arc-shaped sliding grooves is discharged from the gaps, and it is guaranteed that the inner water pressure and the outer water pressure are consistent. Therefore, the sensitivity of thedevice is irrelevant to the underwater depth of the key, and the device can adapt to a deep water environment.

The present invention relates to an automatic induction triggering method based on a hash algorithm and its system, which obtains a frame of barcode image in YUV encoding mode, reduces the image to an image with a multiplied by b pixels, obtains its average gray value, calculates and The difference between the average gray value of a frame of a decoded image is compared with the first preset threshold T1. If the difference does not exceed the first preset threshold T1, automatic sensing will not be triggered, otherwise the hash of the image will be further calculated. Hash value, by comparing the Hamming distance between the hash values ​​of two images, that is, the number of different characters in the same position of the hash values ​​​​of the two images, to judge the similarity of the two images, the less the number of different characters, that is The smaller the Hamming distance, the higher the similarity between the two images. The Hamming distance is compared with the second preset threshold T2, and whether to trigger decoding is determined according to the comparison result.

The invention relates to a multimedia exhibition hall interaction method and device based on image detection and a storage medium. The method comprises the following steps: collecting an original image of an interaction area; performing adaptive threshold binarization to obtain a binarized image; subtracting the background to obtain a foreground image; filtering and de-noising the foreground image to obtain a target image; based on the target image, using a contour detection algorithm to obtain a region of interest; judging whether the region of interest is a bright spot or not based on a preset pixel threshold value and a preset area threshold value, and outputting a position coordinate of the bright spot; and if the bright spot is in a specific area, executing an interaction scene corresponding to the specific area. Compared with the prior art, whether the laser irradiates in the specific area or not is detected through image detection, so that the corresponding interaction scene is triggered, a complex sensor circuit does not need to be designed, the position of a bright spot can be judged quickly and accurately, false triggering is avoided, the response speed is high, and the interaction effect is good.

The present invention relates to a gate circuit which is provided with a turn-off gate circuit composed of an off gate power source EOFF whose one terminal is connected to the emitter of a semiconductor switching element S1 and a switch SWoff for connecting the other terminal of the off gate power source EOFF with the gate of the semiconductor switching element S1 through a resistor Rg. In this case, by providing a second switch SWoff2 for connecting the other terminal of the off gate power source EOFF with the gate of the semiconductor switching element S1 is provided, and closing the second switch SWoff2 at the timing of completing a turn-off operation, it will connect to off gate power source Eoff without passing through a resistor.

The invention discloses a self-adaptive control oxygen supply module which comprises a gas inlet unit, a gas outlet unit and an inspiration unit. The gas inlet unit comprises a first gas channel and asecond channel, wherein gas from the same gas inlet source enters the first gas channel and the second gas channel. The gas outlet unit comprises a gas outlet external joint arranged on a valve body,a gas outlet valve plate and a gas outlet cavity. The inspiration unit comprises an inspiration external joint arranged on a cover, an inspiration valve plate and an inspiration cavity. A gas inlet convex nozzle communicating with the gas outlet cavity is arranged on the inspiration valve plate. A gas inlet membrane used for opening and closing the gas inlet convex nozzle is arranged above the gas inlet convex nozzle. The gas inlet membrane is located in the gas inlet cavity, an adjusting elastic element is arranged above the gas inlet membrane, and the gas inlet cavity communicates with theinspiration external joint through a gas path. By means of the self-adaptive control oxygen supply module, pure mechanical parts are adopted to achieve oxygen supply of a pulse mode and a continuous mode, a inspiration channel and a breathing channel can be opened self-adaptively according to the breathing actions of users in the pulse manner to achieve pulse oxygen uptake, and the aim of saving the oxygen quantity is achieved.

The invention discloses a reactive continuous compensation control method for a thyristor switched filter and belongs to the technical field of application combining power electronics and electric energy quality control, so as to solve the problem that reactive over compensation is likely to happen due to discontinuous reactive compensation of the thyristor switched filter in the prior art. The method of the invention adopts switching of the thyristor switched filter to carry out reactive compensation control on the system, and the system is provided with three fifth harmonic filtering channels TSF1, TFS2 and TSF3 and a seventh harmonic filtering channel TSF4. The method comprises the following steps: three phases of voltage signals ua, ub and uc and three phases of current signals ia, ib and ic are acquired; after the signals are conditioned, the signals are sent to a DSP control chip; in the DSP control chip, seventh harmonic current and fifth harmonic current are acquired; and the switching state of each harmonic filtering channel is determined.

The invention provides an integral contact network identification method, and provides an identification trigger device for identifying a railway system contact network and an acquisition camera connected with the identification trigger device. The method comprises the following steps: the step S10, installing the identification trigger device to a position directly facing the contact network; the step S20, collecting image information near the overhead line system in real time by using the identification triggering device; the step S30, enabling the recognition triggering device to analyze the image information and detect target features, and after the target features are recognized, sending a working signal to the collection camera; and the step S40, enabling the acquisition camera to work to carry out high-definition image acquisition. Compared with the prior art, the overall contact network identification method provided by the invention has the advantages of high trigger precision, small false touch probability and low requirements on installation space, and can ensure the trigger effects in the daytime and at night at the same time.

The invention discloses a novel projector key structure, and belongs to the technical field of projectors. The novel projector key structure comprises: a key board arranged at the top of a case; arrayed key single bodies arranged at the front end of the key board, wherein each arrayed key single body comprises a key section and a deformation section with a concave structure, each deformation section comprises a rear transverse section, a rear vertical section, a bottom transverse section, a front vertical section and a front transverse section which are sequentially connected into a whole, the rear transverse section and the front end of the key board are connected into a whole, and the key section and the front transverse section are connected into a whole, the top surfaces of the key board, the rear transverse section, the front transverse section and the key section are flush with one another, the bottom surfaces of the deformation sections are higher than the top of the case, anda cut-off groove is formed between every two adjacent key single bodies; and a plurality of concave cavities in one-to-one correspondence with the key single bodies, arranged at the front end of the top of the case, wherein key assemblies for receiving key section pressing information are arranged in the concave cavities. The novel projector key structure has a mechanical touch effect, false triggering is avoided, and the consistency is good.

The invention discloses an automatic fusing device and method for a safety belt and a vehicle, the safety belt automatic fusing device comprises a safety belt, a lock pin, a lock catch and a safety belt retractor, a braid hole is formed in the lock pin, and a thrust block is arranged in the lock catch; the device also comprises a heating wire, a safety airbag controller, a power module and a BCM body controller for controlling the power module be on and off. The safety airbag controller is connected with the BCM body controller, a first binding post is arranged at the lower end of a spring bolt of the lock pin, and the two ends of the electric heating wire are connected with the power module and the first binding post. A second binding post used for abutting against the first binding post is arranged on the top face of the thrust block. The BCM body controller and the second binding post are connected with the power module, and the electric heating wire is arranged in the braid hole and used for fusing the safety belt in the braid hole. According to the automatic fusing device for the safety belt, the tied safety belt is automatically electrified, heated and rapidly fused, the restraint of the safety belt on people is rapidly eliminated, and trapped passengers in a passenger compartment are rescued.

The invention relates to a coupling type leakage coaxial cable capable of realizing indoor security and protection. The leakage coaxial cable comprises a plurality of leakage coaxial cable units whichare arranged side by side at equal intervals; a plurality of notches are formed in the leakage coaxial cable parts at equal intervals in the axial direction; and certain included angles are arrangedthe notch directions of the adjacent leakage coaxial cable parts and thus radiation signals of every two adjacent leakage coaxial cable parts are coupled to maximize the front lobe and minimize the rear lobe. Therefore, a radiation characteristic problem of the coupled leakage coaxial cable meeting different application scene requirements is solved. A plurality of leakage cable slotting structuresare provided, so that the front lobe of near-field radiation of the leakage cable meets the requirement of a detection angle; and since the rear lobe is far smaller than the front lobe, false triggering is avoided when a partition wall room walks next to the wall after the leakage cable is buried in the wall.