130 results about "Metallic foreign body" patented technology

The present invention discloses a safety plug socket, which mainly includes a sliding insulating base disposed within an outer housing. A pair of contact conducting strips is located on a bottom surface of the sliding insulating base, and conductive clips disposed internal of a pair of socket holes extend to the bottom portion of the outer housing and form folded strips. When a pair of plug terminals is correctly inserted, then the sliding insulating base is pressed down, thereby causing the lower contact conducting strips to make conductive contact with the folded strips, and causing clips on the conductive clips to make contact with the inserted plug terminals to supply power for use by an electronic product. When a plug is incorrectly inserted or metallic foreign body is inserted, then no electric conduction is realized.

The invention discloses a detection device for metal foreign matter. The detection device for metal foreign matter comprises m detection coils uniformly arranged in parallel in the first direction, and n detection coils uniformly arranged in parallel in the second direction, wherein the detection coils in the first direction overlap the detection coils in the second direction. Each detection coil is composed of k coil units, wherein every two coil units form one set from one end of the detection coil, the detection units included in each set are different, the two coil units in each set are equal in area and opposite in winding direction, and when the coil units of the detection coil are placed in a magnetic field, the voltage or current of the detection coil is within a preset value range. The invention further discloses a detection method and a judgment device for metal foreign matter and a wireless charging system. The metal foreign matter detection sensitivity of the wireless charging system is improved.

The invention relates to an algorithm for indirectly detecting metal foreign bodies for a wireless charger. When the metal foreign bodies appear between the wireless charger and mobile equipment, eddy-current loss of the metal foreign bodies is caused, heat is generated, and accordingly ignition and other security problems are brought. The algorithm is used for detecting heating of the metal foreign bodies and terminating power transmission in time. The core content of the algorithm is as follows: the difference between power transmitted from the transmitting end of the wireless charger and power received from the receiving end of the mobile equipment is detected so that loss power of the metal foreign bodies can be calculated, if the loss power exceeds a certain set value, power transmission is terminated, and thus the temperature of the metal foreign bodies is prevented from further rising. An indirect detection method is used for detecting transmission power, the vector difference of a voltage effective value and a current effective value is deduced so that a vector phase difference can be obtained, accordingly the vector phase difference between active power and apparent power is obtained, and the effective value of the active power is solved through the effective value of the apparent power and the vector difference; compared with a direct detection method, cost is obviously reduced.

The invention relates to an algorithm for directly detecting metal foreign bodies for a wireless charger. When the metal foreign bodies appear between the wireless charger and mobile equipment, eddy-current loss of the metal foreign bodies is caused, heat is generated, and accordingly ignition and other security problems are brought. The algorithm is used for detecting heating of the metal foreign bodies and terminating power transmission in time. The core content of the algorithm is as follows: the difference between power transmitted from the transmitting end of the wireless charger and power received from the receiving end of the mobile equipment is detected so that loss power of the metal foreign bodies can be calculated, if the loss power exceeds a certain set value, power transmission is terminated, and thus the temperature of the metal foreign bodies is prevented from further rising.

The invention discloses an inductive power supply used for transmitting the inductive power and detecting whether a metallic foreign body exists. The inductive power supply comprises a processing module for generating a control signal in accordance with a default data and a feedback signal; a drive module for converting a stable voltage source to a drive voltage in accordance with the control signal; an induction coil for electrically transferring the drive voltage for the induction power transmission; and a feedback module for generating the feedback signal in accordance with the drive voltage received by the induction coil, wherein the default data is an initial state of the inductive power supply and a sine wave amplitude corresponding to the drive voltage containing the initial state, and the metallic foreign body influence a sine wave amplitude corresponding to the feedback signal.

The invention provides a wireless electric energy transmission system and a metal foreign body detection method thereof. The wireless electric energy transmission system comprises a wireless transmitting end and a wireless receiving end, wherein the wireless transmitting end and the wireless receiving end can carry out energy and communication transmission. The wireless transmitting end further comprises a transmitting end MCU, and a transmitting end resonant capacitor connected to a transmitting coil electric energy input end. Metal foreign body detection circuits capable of being used for detecting whether metal foreign bodies exist or not are arranged at the two ends of the transmitting end resonant capacitor in parallel. The transmitting end MCU is electrically connected with the metal foreign body detection circuits to control the metal foreign body detection circuits to be started or not. The wireless electric energy transmission system is used for the method for detection of the metal foreign bodies. Whether the metal foreign bodies exist between a transmitting coil and a receiving coil or not is recognized firstly before the wireless electric energy system works, and safe, reliable and stable work of the whole wireless electric energy transmission system is guaranteed.

The invention relates to a glass lining paper and a glass plate package body. The glass lining paper is applied during the laminating process of glass plates, wherein the wiring abnormality caused by metal foreign bodies transferred from the glass lining paper is prevented. Meanwhile, the above problem is solved through setting the metal content to be smaller than 0.1 mass% or setting the air permeability to be larger than 10 sec.

The invention discloses a potable metal foreign body quick examination device and a method for positioning an in-vivo metal foreign body, which are characterized in that: a fully pre-charged rechargeable battery is arranged in a battery box in a power supply module; and after the check for ensuring that metal objects on a measurer and an experimenter are removed, a power supply switch is turned on to connect the power supply to enable the device to work. Input equipment selects the denoising degree and sensitivity parameter of a control module and adjusts a measurement output value, so that the system is in an optimal state; and a probe which consists of two parallelly arranged fluxgate sensors and a signal processing circuit thereof is attached to the body surface of the experimenter and slowly moves to reciprocally examine the metal foreign body for 3 to 5 times, and when an output displaying and alarming unit displays that the measurement output is changed obviously and gives an alarm, 2 to 3 points at which the measurement output changes most obviously are found out near a measurement region to serve as positioning points and the center of a circle of the selected positioning points is determined as the position of the metal foreign body.

A contactless power supply system includes a power supply areas, each provided with a primary coil and a primary authentication coil. The primary coil and primary authentication coil are arranged at different locations. An electric appliance includes a power reception area provided with a secondary coil and a secondary authentication coil. The secondary coil and the secondary verification coil are arranged at different locations. The presence of a metal foreign object is detected between the primary coil and secondary coil based on a transmission oscillation signal generated by the primary coil, and the presence of a metal foreign object is detected between the primary authentication coil and secondary authentication coil based on an authentication oscillation signal generated by the primary authentication coil.

The invention discloses a method and a device for extracting a metallic foreign body from an X-ray image. The method mainly comprises the following steps of: reading image data; detecting a complete edge of the metallic foreign body; recognizing a pixel point which satisfies a gray scale condition and span judgment as a metallic foreign body mark point; and growing the region of the image by using the metallic foreign body mark point as a seed point and the complete edge of the metallic foreign body as a constraint condition to obtain a metallic foreign body region. According to the method and the device for extracting the metallic foreign body from the X-ray image of the embodiment of the invention, the metallic foreign body which influences image enhancement in the image is eliminated, and then, the image is displayed in an enhancement mode in order to reduce the enhancement influence of a dissecting image by the metallic foreign body and improve the default display effect of the image.

The invention discloses a wireless charging foreign matter detection system, a wireless charging system and a charging method, and belongs to the technical field of wireless charging. The method comprises the steps: detecting and judging whether metal foreign matter exists or falls between a transmitting coil and a receiving coil in wireless power transmission or not, giving an alarm in time, controlling power transmission, performing positioning and size judgment on a metal foreign matter, and properly evaluating the metal foreign matter. According to the invention, a metal foreign matter detection unit is arranged on an energy emission unit, the metal foreign matter detection unit can detect the size and position of the metal foreign matter through the magnetic coupling relation betweenthe metal foreign matter and a detection coil, preliminary evaluation is conducted on the metal foreign matter, and the metal foreign matter is removed through a foreign matter removing unit; the transmission efficiency of the wireless charging process is prevented from being influenced by metal foreign matters, and the heating problem caused by eddy current is avoided; if elimination fails, an alarm is given out to stop charging, so abnormal conditions are avoided.

The invention provides a metal foreign body detection method and a mobile terminal. The method includes the following steps that: the calibration resonant frequency of the resonant cavity of the transmitting end of a wireless charging device is calculated; the frequency difference of the half-power point frequency of the calibrated upper side frequency of the resonant cavity and the half-power point frequency of the calibrated lower side frequency of the resonant cavity under a half-power point is calculated; the ratio of the calibration resonant frequency to the frequency difference is calculated, so that the quality factor of the resonant cavity can be obtained; whether the quality factor is smaller than a preset quality factor threshold value is judged; and if the quality factor is smaller than the preset quality factor threshold value, it is determined that a metal foreign body exists on the surface of the interface of the transmitting end of the wireless charging device. Accordingto the metal foreign body detection method and the mobile terminal of the invention, the calibration resonant frequency of the resonant cavity of the transmitting end of the wireless charging deviceand the frequency difference of the half-power point frequency of the calibrated upper side frequency of the resonant cavity and the half-power point frequency of the calibrated lower side frequency of the resonant cavity under the half-power point are calculated, and therefore, the quality factor Q value can be obtained, it does not need to measure the power loss of the transmitting end and receiving end of the wireless charging device, the detection accuracy of the metal foreign body is improved, and the difficulty and complexity of operation can be reduced.

The embodiment of the invention provides the metal foreign matter detection method of a wireless electrical energy transmission system. The method comprises the following steps of analyzing mutual inductance between a transmitting end and a receiving end in the wireless electrical energy transmission system, obtaining a mutual inductance expression between the transmitting end and a receiving coilwhen the receiving end is the receiving coil, and obtaining the mutual inductance expression between the transmitting end and metal when the receiving end is the metal; and measuring the mutual inductance between the transmitting end and the receiving end of the system, comparing with a mutual inductance theoretical value acquired through calculating each expression, and determining whether a metal foreign matter exists in the system. In the invention, through comparing the metal with the equivalent impedance of the receiving coil, whether the metal foreign matter exists in the system is determined, the system is prevented from taking a metal object as an original target load to carry out energy transmission, the safety threats and the energy losses of the system are reduced, and the safety and the reliability of the system are increased. By using the metal foreign matter detection method, an extra metal detection device does not need to be added, and safe and reliable metal foreign matter detection can be performed on a high-dimensional wireless electrical energy transmission system.

The invention discloses an electric automobile and a foreign object detection device for the electric automobile. The foreign object detection device comprises a shell used for being fixedly connectedwith the body of a target electric automobile, wherein the shell is internally provided with an infrared thermal imaging camera used for detecting a foreign object in the charging environment when the target electric automobile is wireless charged, a camera steering engine used for adjusting the shooting range of the infrared thermal imaging camera and a main controller used for performing electric control. The heat in the charging environment is detected through the infrared thermal imaging camera and can be processed into a thermal infrared image, thus whether there is a metal foreign object or a living body between the electric automobile and a wireless charging device or not is judged, the camera steering engine enables the foreign object detection device to adapt to different modelsof electric automobiles, the shooting angle of the camera can be adjusted, and the infrared thermal imaging camera is enabled to be flexibly aligned to a transmitting coil of the wireless charging device, so that accurate detection for a foreign object in the wireless charging environment of the electric automobile is achieved, and thus the safety of wireless charging is ensured.

The invention provides a metal foreign matter detection method and device, a wireless charging system and an electric vehicle, and relates to the field of wireless charging. An excitation source in the metal foreign matter detection device can drive transmitting coils in coil groups to generate a detection magnetic field, so that the detection coils in the coil groups can generate an induction signal in the detection magnetic field. Since a power transmitting coil is not needed to provide a detection magnetic field, the detection efficiency and the detection flexibility of metal foreign matters are effectively improved. Moreover, each coil group comprises a plurality of detection coils, and one or more parameters of the structures of the plurality of detection coils and the arrangement positions of the plurality of detection coils on the arrangement plane of the coil group are different, so that a foreign matter detection circuit can detect the metal foreign matters according to induction signals generated by the plurality of detection coils, the detection accuracy of the metal foreign matters is improved, and a good detection effect is achieved.

An object of the present invention is to reduce the possibility of failure in the detection of metallic foreign object. A metallic foreign object detector includes a sensor part having at least one antenna coil that receives a magnetic field or current to generate a vibration signal a vibration time length measurement circuit that measures a vibration time length indicating the length of time required for the vibration of the vibration signal output from the sensor part corresponding to a predetermined wavenumber larger than 1, and a determination circuit that determines the presence / absence of a metallic foreign object approaching the antenna coil based on the vibration time length and a criterion vibration time length which is the vibration time length obtained in the absence of the approaching metallic foreign object.

The invention provides a wireless power transmission foreign matter detection and living body detection sharing system and an identification method. The system includes: a digital frequency synthesizer, a processor, a resistor Rin, an operational amplifier, an analog-to-digital converter, a band-pass filter, a resistor Rp, a parallel resonant capacitor Cp and a plurality of detection coils Lk (k =1, 2, n). The digital frequency synthesizer is connected with the inverting input end of the operational amplifier through the resistor Rin. The in-phase input end of the operational amplifier is grounded, the output end of the operational amplifier, the analog-to-digital converter and the band-pass filter are connected in sequence, and the resistor Rp, the parallel resonant capacitor Cp and theplurality of detection coils are connected to the reverse input end and the output end of the operational amplifier in parallel. By monitoring the impedance characteristic change trend of the detection coil under multiple resonant frequencies when different types of foreign matters exist, information such as existence and types of the foreign matters is extracted, and detection of living foreign matters and metal foreign matters is realized at the same time.

The invention discloses a foreign body detection device and relates to the field of cash transaction. A throwing-in mechanism is used for placement of thrown paper money; an ion fan is used for exerting force on the paper money inside the throwing-in mechanism by pushing a baffle; a detection assembly is connected with the throwing-in mechanism and used for obtaining the weight and the thickness of the paper money inside the throwing-in mechanism; a control part is connected with the throwing-in mechanism, the detection assembly and the ion fan and used for controlling the throwing-in mechanism, the detection assembly and the ion fan, and the control part judges whether a foreign body exists or not according to the difference between the thickness detected by the detection assembly and a pre-determined reference signal. The ion fan pushes the baffle, so that it is avoided that the baffle generates static electricity in the movement process of the throwing-in mechanism and measurement of the thickness of the paper money is affected; as the detection assembly obtains the thickness and weight of the paper money, the accuracy of measurement on foreign bodies is improved, especially the accuracy of measurement on metal foreign bodies is improved, an obvious difference is generated by comparing the weight of the paper money with the reference signal, and the accuracy of measurement is improved.

A device for accepting banknotes comprises a compartment for receiving a bundle of banknotes and a separating mechanism for extracting individual banknotes from the bundle. A sensor system for detecting metallic foreign bodies connected to the banknotes is arranged along at least one of the walls defining the compartment.

The invention discloses a handheld detector for penetration of metallic foreign bodies in an automobile tire. The handheld detector comprises a main body, wherein at least three metal detecting heads arranged in array form are arranged in the main body, correspondingly arranged LEDs (light emitting diodes) are located over the metal detecting heads arranged in array form, and the metal detecting heads and the LEDS are connected with a speaker and an electrical appliance control device. An electromagnetic shielding plate is arranged between the metal detecting heads and the LEDs; the metal detecting heads arranged in array form are located on a detecting head fixing tray; the electrical appliance control device comprises a power supply, a power supply switch and a detector connected with teach other; and radius of each metal detecting head is 1-3.5 cm. The array type small metal detecting heads are convenient for detecting and positioning, since the detecting heads are small, detection can be accurate, and the foreign bodies can be conveniently positioned; since many detecting heads are provided, detection efficiency can be improved, detection time can be shortened, and metallic foreign bodies, such as screws, nails, scrap irons and the like, penetrated into the automobile tire can be detected so as to discover the hidden danger of tire blowout in advance.

The invention belongs to the field of clothes treatment equipment, and particularly discloses a washing machine and a control method. The washing machine comprises a washing barrel; multiple groups offoreign matter detection devices are mounted on the barrel wall of the washing barrel; each group of foreign matter detection devices at least comprises a terahertz emitting device and a terahertz receiving device; and clothes in the washing barrel are detected through the foreign matter detection devices to determine whether foreign matters exist or not. The multiple groups of foreign matter detection devices are arranged on the washing barrel, and any substance can be detected by adopting a terahertz image technology, so that the accuracy of substance detection is greatly improved, the metal foreign matter and the non-metal foreign matter can be distinguished from the clothes, and the effect of accurately distinguishing the foreign matters is achieved.

The invention discloses an electric vehicle wireless charging metal foreign matter detection system and method, and relates to the technical field of electric vehicle wireless charging. The system comprises a processor, a resonance circuit, a voltage sampling circuit, a power supply and a plurality of foreign matter detection coil modules arranged on a charging coil module at intervals, the foreign matter detection coil modules are separately connected with the resonance circuit through a relay K11 and connected with the voltage sampling circuit through a relay S11, the control ends of the relays K11 and S11 and the signal output end of the voltage sampling circuit are respectively connected with the processor, and the power supply is respectively connected with the resonance circuit and the processor. According to the scheme, the resonance voltage amplitude difference characteristic of the foreign matter detection coil module is utilized, the size and the existing position condition of the metal foreign matter are distinguished by sampling the amplitude difference of the voltage, the wireless charging safety of the electric vehicle can be improved, and potential safety hazards are eliminated.

The invention discloses a pulse type electromagnetic induction principle based metal foreign matter detection system and method of a washing machine. The system comprises a detection coil arranged on the outer side of a dewatering barrel of the washing machine; a pulse transmitting circuit is electrically connected with the detection coil and sends a pulse signal to the detection coil; a signal processing circuit is electrically connected with the detection coil and receives an induction signal sent by the detection coil; a receiving control circuit is electrically connected with the signal processing circuit and controls whether the induction signal sent by the detection coil is received or not; and a main control processing circuit is electrically connected with the pulse transmitting circuit and sends a pulse transmitting time sequence to the pulse transmitting circuit. According to the detection system disclosed by the invention, based on the time domain pulse type electromagnetic induction principle, the detection coil is driven by periodic pulse current to emit alternating electromagnetic waves into a drum of the washing machine, the alternating electromagnetic waves are called a primary field, if metal foreign matter exists in pockets of clothes put into the drum, eddy current can be generated to excite a secondary field, the secondary field is received by the detection coil, and the detection system performs processing and then gives an alarm, thereby achieving the purpose of detecting the metal foreign matter.

The invention relates to an automatic separation control device for metal foreign objects in tobacco shreds. The automatic separation control device is characterized in that after a first metal detector detects that the metal objects are mixed in tobacco leaves, a first pneumatic door is controlled by a controller to be opened, so that the tobacco leaves mixed with the metal matters enter a discharging channel, and meanwhile, a blowing device is controlled to blow air upwards, so that the falling time difference of the tobacco leaves and the metal objects is caused, the metal objects are separated from the tobacco leaves and are adsorbed by a first magnet, the separation effect in the discharging channel is improved, the time difference of conduction of the first magnet and a second magnetis utilized, and the second magnet is used for carrying out secondary separation on the metal objects which are not completely separated in the tobacco leaves; the tobacco leaves entering an upper-layer material box are detected through a second metal detector, if the metal objects in the tobacco leaves are completely separated, a second pneumatic door is controlled to be opened to enable the tobacco leaves to fall into a lower-layer material box, and if it is detected that the tobacco leaves entering the upper-layer material box still contain the metal objects, the tobacco leaves are directly discharged from the upper-layer material box, and automatic separation of the tobacco leaves and the metal objects is achieved.

The invention relates to the technical field of metal foreign matter cleaning devices, and provides a portable metal foreign matter cleaning device which comprises an operation component, a cleaning component and a control component. The telescopic operation part is provided with a cleaning operation end and a connecting end, the connecting end is connected to the operation part, and the cleaning operation end is far away from the operation part; the electronic probe is arranged at the cleaning operation end; the electromagnetic adsorption component is arranged at the cleaning operation end; the electronic control component is arranged on the operation component and electrically connected with the electromagnetic adsorption component and the electronic probe, and the portable metal foreign matter cleaning device is simple in structure arrangement, convenient to carry and particularly suitable for but not limited to pipeline maintenance work in nuclear power maintenance work.

Disclosed are a wireless electric power transmission apparatus and a metal foreign substance detection coil structure thereof. According to the wireless electric power transmission apparatus, electromagnetic wave is radiated to the outside through a transmitting antenna, and multiple metal foreign substance detection coils sense the electromagnetic wave and correspondingly generate multiple to-be-detected signals; and each metal foreign substance detection coil consists of three coil units connected in series, and the three coil units are arranged at intervals, wherein the distribution region of the transmitting antenna covers the multiple metal foreign substance detection coils. Whether a metal foreign substance enters the range of the electromagnetic wave of the transmitting antenna or not can be judged according to a reference voltage signal and the multiple to-be-detected signals corresponding to the multiple metal foreign substance detection coils by adoption of a controller, so that electromagnetic wave generation can be stopped when the metal foreign substance is detected, in order to avoid heating of the metal foreign substance by electromagnetic wave.

The invention provides an all metal foreign substance detection device used for an aluminum foil packed products, relates to an all metal foreign substance detection technology for the aluminum foil packed products, and is suitable for performing all metal foreign substance detection on the aluminum foil packed products and general products. The all metal foreign substance detection device is composed of a sensor (probe), a detection signal receiving module, a detection signal processing module, a detection signal excitation module, a reference signal source, a central control unit, an IO module, a human-computer interface and a power supply system. The detection signal receiving module receives detection signals acquired by the sensor. The detection signals are processed through a detection signal automatic balancing circuit and then the signals are processed through the detection signal processing module so that reliability, stability and sensitivity of signal detection can be enhanced. The all metal foreign substance detection device is reasonable in structure, convenient to operate and great in detection effect so that the all metal foreign substance detection device can be used for all metal foreign substance detection of the aluminum foil packed products and all metal foreign substance detection of non-aluminum foil packed products with high "product effect" so that the all metal foreign substance detection device has great economic benefit.

An object of the present invention is to improve the accuracy of detection of the metallic foreign object. A metallic foreign object detector includes a sensor part having at least one antenna coil that receives a magnetic field or current to generate a vibration signal, an integration circuit that acquires the integral value of a waveform of a signal corresponding to the vibration signal, and a determination circuit that determines the presence / absence of a metallic foreign object approaching the antenna coil based on the integral value and a criterion integral value which is the integral value obtained in the absence of the approaching metallic foreign object. The integral value and the criterion integral value are obtained by integrating the waveform having the same wavenumber.

The invention discloses an winding structure of a metal foreign matter detection coil for electromagnetic induction, a method and a system. The winding structure comprises a first-stage coil matrix, wherein the first-stage coil matrix comprises a first detection coil group, the first detection coil group comprises four first detection coils, the four first detection coils are distributed in a shape like a Chinese character tian and are sequentially connected end to end to form a coil, and the winding directions of every two adjacent first detection coils are opposite. The detection method comprises the following steps: detecting an induced voltage U1 of the first-stage detection coil matrix, and if U1 exceeds a preset threshold U01, judging that there is a metal foreign matter; if the U1 does not exceed the preset threshold U01, further detecting the induced voltage U2 of a second-stage detection coil matrix, and if the U2 exceeds a preset threshold U02, judging that a metal foreign matter exists; and if the U2 does not exceed the preset threshold U02, continuing to detect until the N-level detection coil matrix is detected. According to the invention, the applicability of power wireless charging equipment to different types of metal foreign matters can be improved.