Abstract: A multi-functional measuring instrument includes: a housing, and a control circuit board and a wall detection circuit mounted inside the housing. Specifically, a hidden slot is arranged at a bottom end portion of the housing, a humidity measuring device is mounted inside the hidden slot in a sliding mode, and a thermal imaging device is mounted on one side of the housing. According to the present disclosure, the multi-functional measuring instrument is an instrument integrating various functions of wall detection, thermal imaging, distance measurement, laser projection, humidity measurement and the like. The instrument has a compact structure, is easy to carry on, and is applicable to various aspects of building detection, auto repair detection, floor-heating detection, electrical detection and the like.

Abstract: The present disclosure discloses a multifunctional metal detector, including a housing and a control circuit board and a wall detection circuit mounted in the housing. The multifunctional metal detector further includes at least one coupling assembly capable of being connected to the control circuit board, the coupling assembly being constructed for detachably coupling and connecting at least one functional device to the multifunctional metal detector. The coupling assembly is used to detachably couple and connect at least one functional device to different functional devices, so as to achieve the combined application of metal detection and other functions selected by a user on his/her own.

Abstract: A metal sensor, a method for analyzing a measurement signal of the sensor, and a method for detecting an object surrounded by a medium via the sensor. The metal sensor has at least one transmission coil and at least one receiving coil system inductively coupled to each other, wherein the receiving coil system comprises at least one first receiving coil and at least one second receiving coil located in a same plane; the transmission coil forms a projection on the plane; an area formed by the first receiving coil on the plane contains the projection; and an area formed by the second receiving coil on the plane is arranged around the projection. The receiving coils are arranged to have a same winding direction, produce induction with a second magnetic field generated by a target metal object, and generate induced voltages superimposed on one another other on the receiving coils.

Abstract: A device for locating an object, and a method for locating an object using the apparatus. The device comprises at least one transmission coil (100) for transmitting a measurement signal and at least one receiving coil system (200) for receiving a measurement signal, which are inductively coupled to each other, and the receiving coil system (200) is provided with at least two output stages (11, 22, 33, 44, 55, 66), the output stages (11, 22, 33, 44, 55, 66) being connected or disconnected by means of a switch device (11i?, 22i?, 33i?, 44i?, 55i?, 66i?). The method for locating an object using the device can increase the sensitivity of detection for a target object, and does not form a blind zone for measurement, which significantly improves the measurement accuracy.

Abstract: A metal sensor, a method for analyzing a measurement signal of the sensor, and a method for detecting an object surrounded by a medium via the sensor. The metal sensor has at least one transmission coil and at least one receiving coil system inductively coupled to each other, wherein the receiving coil system comprises at least one first receiving coil and at least one second receiving coil located in a same plane; the transmission coil forms a projection on the plane; an area formed by the first receiving coil on the plane contains the projection; and an area formed by the second receiving coil on the plane is arranged around the projection. The receiving coils are arranged to have a same winding direction, produce induction with a second magnetic field generated by a target metal object, and generate induced voltages superimposed on one another other on the receiving coils.

Abstract: A method of forming a wrapped-around shielded perpendicular magnetic recording writer pole is disclosed. A structure comprising a leading shield layer and an intermediate layer disposed over the leading shield layer is provided, the intermediate layer comprising a pole material and a dielectric material. A trench is formed in the dielectric material. A non-magnetic layer in the trench is removed via an ion beam etching process. A seed layer is deposited in the trench and over the pole material. A magnetic material comprising a side shield layer is deposited on at least a portion of the seed layer.

Abstract: A method fabricates a magnetic transducer. A sacrificial leading shield is provided on an etch stop layer. A nonmagnetic layer is provided on the sacrificial leading shield. A pole trench is formed in the nonmagnetic layer and on the sacrificial leading shield. A pole is formed. The pole has a bottom and a top wider than the bottom in a pole tip region. Part of the pole in the pole tip region is in the pole trench and at the ABS location. The sacrificial leading shield and part of the nonmagnetic layer adjacent to the pole are removed. An air bridge thus resides in place of the sacrificial leading shield between the portion of the pole and the etch stop layer. As least one shield layer is provided. The at least one shield layer substantially fills the air bridge and form a monolithic shield including a leading and side shields.

Abstract: A method and system provide a magnetic recording transducer having air-bearing surface (ABS). The magnetic recording transducer includes a pole, a side shield, a nonmagnetic gap between the side shield and the pole and at least one coil for energizing the pole. The pole has a pole tip proximate to the ABS. The side shield includes at least one nonconformal portion that extends from a throat height in a stripe height direction perpendicular to the ABS and is nonconformal with the pole. The spacing between the nonconformal portion(s) of the side shield and the pole varies based on a distance from the ABS.

Abstract: A method or forming a wrapped-around shielded perpendicular magnetic recording writer pole is disclosed. A structure comprising a leading shield layer and an intermediate layer disposed over the leading shield layer is provided, the intermediate layer comprising a pole material and a dielectric material. A trench is formed in the dielectric material. A non-magnetic layer in the trench is removed via an ion beam etching process. A seed layer is deposited in the trench and over the pole material. A magnetic material comprising a side shield layer is deposited on at least a portion of the seed layer.

Abstract: The invention relates to a method for preventing TCP SYN package flood attack, and belongs to the computer network security field. First, the firewall receives a client a TCP SYN connection request package, and responses, as an agent of the server, an acknowledgement of the TCP SYN connection request package with zero window size to the client. Then, the firewall records information about the TCP SYN connection request package and checks whether the connection request is legal. When the firewall has received a TCP SYN response package from the server, it returns an acknowledgement of said TCP SYN response package. At the same time, the firewall, as an agent of the server, sends an acknowledgement packet with nonzero window size to the client for initiating data transmission from the client. After that, data packets are transferred between the client and the server forwarded by the firewall as an agent.

Abstract: The invention relates to a method for preventing TCP SYN package flood attack, and belongs to the computer network security field. First, the firewall receives a client a TCP SYN connection request package, and responses, as an agent of the server, an acknowledgement of the TCP SYN connection request package with zero window size to the client. Then, the firewall records information about the TCP SYN connection request package and checks whether the connection request is legal. When the firewall has received a TCP SYN response package from the server, it returns an acknowledgement of said TCP SYN response package. At the same time, the firewall, as an agent of the server, sends an acknowledgement packet with nonzero window size to the client for initiating data transmission from the client. After that, data packets are transferred between the client and the server forwarded by the firewall as an agent.