Abstract: The present disclosure a temperature-resistant and salt-resistant modified nano-graphite dispersed particle gel system with a strong self-growth effect.

Abstract: The present disclosure a temperature-resistant and salt-resistant modified nano-graphite dispersed particle gel system with a strong self-growth effect.

Abstract: A method of acquiring feature information of a detected object is provided, including: controlling the detected object to pass through a detection apparatus; controlling an imaging system to perform radiation scanning on the detected object acquiring a radiation scanning image of the detected object acquiring feature information of the detected object through the radiation scanning image. The detected object includes a first part, a detection part and a second part sequentially in a first direction. The acquiring feature information of the detected object through the radiation scanning image includes: acquiring a first boundary line between the detection part and the first part and a second boundary line between the detection part and the second part through the radiation scanning image; and calculating a dimension between the first boundary line and the second boundary line in the first direction to acquire a dimension of the detection part in the first direction.

Abstract: A method for detecting a surface welding quality of friction stir welding includes: acquiring a continuous surface depth image of a welding seam; intercepting a surface depth image segment of the welding seam with a proper step size, and dividing the intercepted surface depth image segments of the welding seam into a front reference region, a thinned region and a rear reference region; judging whether flatness of the front reference region is less than a threshold, and if yes, taking a height of the front reference region at this point as a latest reference height; if no, judging whether the flatness of the rear reference region is less than the threshold, and if yes, taking a height of the rear reference region at this point as the latest reference height; if no, taking the reference height of previous depth image segment as the latest reference height; and calculating a difference.

Abstract: A method for detecting a surface welding quality of friction stir welding includes: acquiring a continuous surface depth image of a welding seam; intercepting a surface depth image segment of the welding seam with a proper step size, and dividing the intercepted surface depth image segments of the welding seam into a front reference region, a thinned region and a rear reference region; judging whether flatness of the front reference region is less than a threshold, and if yes, taking a height of the front reference region at this point as a latest reference height; if no, judging whether the flatness of the rear reference region is less than the threshold, and if yes, taking a height of the rear reference region at this point as the latest reference height; if no, taking the reference height of previous depth image segment as the latest reference height; and calculating a difference.

Abstract: A wearable passive sweat detection device includes at least one detection sensor that includes: a base plate; a sensing element provided on the base plate, the sensing element including a sweat collection portion and a sweat self-driven detection portion, the sweat collection portion being configured to collect sweat discharged by sweat glands of skin, the sweat self-driven detection portion including a guide portion of a semi-conical structure, a test electrode provided on an outer conical surface of the guide portion, and a back electrode, and a narrow end of the guide portion facing the sweat collection portion; and a test element connected with the test electrode and back electrode. The adoption of the conical structure achieves a liquid-solid friction effect to realize passive detection of sweat components; meanwhile, flexibility is realized to facilitate wearing; by using different ion selective films, different ion concentrations can be detected; detection precision is high.

Abstract: Disclosed is a triboelectric nanogenerator-based biochemical droplet reaction device, which includes a reaction generating part and a power generation part. The power generation part includes a triboelectric component and a rectifier circuit. The triboelectric component includes a drive electrode, a substrate, a first friction electrode, a first friction material, a second friction material, and a second friction electrode arranged in sequence from top to bottom. A gap exists between the first friction material and the second friction material. The first friction electrode is connected to the first friction material. The second friction electrode is connected to the second friction material. The drive electrode, the first friction electrode, and the second friction electrode are all connected to the rectifier circuit. Also disclosed is a reaction method.

Abstract: A device of nondestructive transfer of liquid drops includes a power generation part and a clamping part. The power generation part includes a movable friction material and at least two fixed friction materials. The clamping part includes a supporting mechanism and a left dielectric wetting splint and a right dielectric wetting splint installed on the supporting mechanism. The movable friction material is connected to the left dielectric wetting splint. The at least two fixed friction materials are connected to the right dielectric wetting splint. Also disclosed are a method of nondestructive transfer of liquid drops and a method of micro-reaction of liquid drops.

Abstract: A negative pressure pipeline opening-and-closing device includes a blocking member and a buoyant member. The buoyant member comprises two floats and a connection rod connected to the two floats. The liquid reservoir is provided with a guide therein, and the guide confines the two floats, the blocking member and the liquid outlet port in the same vertical line. A limiting member is arranged between the two floats and is fixed to an inner wall of the liquid reservoir. A maximum distance between the limiting member and a top wall of a lower float of the two floats is smaller than a maximum distance between a top wall of an upper float of the two floats and a top wall of the liquid reservoir. The negative pressure pipeline opening-and-closing device can replace an existing electrically controlled valve. Therefore, the cost is reduced, the maintenance is convenient and service life is prolonged.

Abstract: A device of nondestructive transfer of liquid drops includes a power generation part and a clamping part. The power generation part includes a movable friction material and at least two fixed friction materials. The clamping part includes a supporting mechanism and a left dielectric wetting splint and a right dielectric wetting splint installed on the supporting mechanism. The movable friction material is connected to the left dielectric wetting splint. The at least two fixed friction materials are connected to the right dielectric wetting splint. Also disclosed are a method of nondestructive transfer of liquid drops and a method of micro-reaction of liquid drops.

Abstract: Disclosed is a triboelectric nanogenerator-based biochemical droplet reaction device, which includes a reaction generating part and a power generation part. The power generation part includes a triboelectric component and a rectifier circuit. The triboelectric component includes a drive electrode, a substrate, a first friction electrode, a first friction material, a second friction material, and a second friction electrode arranged in sequence from top to bottom. A gap exists between the first friction material and the second friction material. The first friction electrode is connected to the first friction material. The second friction electrode is connected to the second friction material. The drive electrode, the first friction electrode, and the second friction electrode are all connected to the rectifier circuit. Also disclosed is a reaction method.

Abstract: A negative pressure pipeline opening-and-closing device includes a blocking member and a buoyant member. The buoyant member comprises two floats and a connection rod connected to the two floats. The liquid reservoir is provided with a guide therein, and the guide confines the two floats, the blocking member and the liquid outlet port in the same vertical line. A limiting member is arranged between the two floats and is fixed to an inner wall of the liquid reservoir. A maximum distance between the limiting member and a top wall of a lower float of the two floats is smaller than a maximum distance between a top wall of an upper float of the two floats and a top wall of the liquid reservoir. The negative pressure pipeline opening-and-closing device can replace an existing electrically controlled valve. Therefore, the cost is reduced, the maintenance is convenient and service life is prolonged.

Abstract: The present invention discloses a piezoelectric ultrasonic microinjection device based on a flexible hinge mechanism. The device includes: a cover, a flexible hinge mechanism, a base, a screw cap and an end cap fixedly assembled together, the base being provided with a pump interface; and a micropipette fixedly mounted in the base, the screw cap and the end cap and extending outward, the micropipette being in communication with the pump interface; wherein the flexible hinge mechanism comprises a housing, a piezoelectric ceramic package module encapsulated in the housing, a central shaft fixedly mounted with the piezoelectric ceramic package module and the base, and a vibration output shaft extending from the piezoelectric ceramic package module into the central shaft, a plurality of flexible hinge beams being disposed between the central shaft and the housing.

Abstract: A negative pressure pipeline opening-and-closing device includes a blocking member and a buoyant member. The buoyant member comprises two floats and a connection rod connected to the two floats. The liquid reservoir is provided with a guide therein, and the guide confines the two floats, the blocking member and the liquid outlet port in the same vertical line. A limiting member is arranged between the two floats and is fixed to an inner wall of the liquid reservoir. A maximum distance between the limiting member and a top wall of a lower float of the two floats is smaller than a maximum distance between a top wall of an upper float of the two floats and a top wall of the liquid reservoir. The negative pressure pipeline opening-and-closing device can replace an existing electrically controlled valve. Therefore, the cost is reduced, the maintenance is convenient and service life is prolonged.

Abstract: The present invention discloses a piezoelectric ultrasonic microinjection device based on a flexible hinge mechanism. The device includes: a cover, a flexible hinge mechanism, a base, a screw cap and an end cap fixedly assembled together, the base being provided with a pump interface; and a micropipette fixedly mounted in the base, the screw cap and the end cap and extending outward, the micropipette being in communication with the pump interface; wherein the flexible hinge mechanism comprises a housing, a piezoelectric ceramic package module encapsulated in the housing, a central shaft fixedly mounted with the piezoelectric ceramic package module and the base, and a vibration output shaft extending from the piezoelectric ceramic package module into the central shaft, a plurality of flexible hinge beams being disposed between the central shaft and the housing.

Abstract: A method for controlling NFC tag and a controlled NFC tag, said method comprising: producing an on or off control signal causing an electronic switch to close or to open, the off or on control signal being exerted upon the electronic switch in parallel connection with the NFC antenna coil; by means of an enabling signal or a disabling signal emitted by the electronic switch, enabling or disabling transfer of electromagnetic energy coupled with the NFC antenna coil to the NFC tag chip. The controlled NFC tag comprises: an NFC tag body, an electronic switch in parallel connection with the NFC antenna coil, and an electronic switch control circuit producing on or off control signals for the electronic switch. The present invention allows information inside the NFC chip to be accessed according to certain conditions, thus avoiding unnecessary operations while enhancing the security of information stored in the NFC chip.

Abstract: A method for controlling NFC tag and a controlled NFC tag, said method comprising: producing an on or off control signal causing an electronic switch to close or to open, the off or on control signal being exerted upon the electronic switch in parallel connection with the NFC antenna coil; by means of an enabling signal or a disabling signal emitted by the electronic switch, enabling or disabling transfer of electromagnetic energy coupled with the NFC antenna coil to the NFC tag chip. The controlled NFC tag comprises: an NFC tag body, an electronic switch in parallel connection with the NFC antenna coil, and an electronic switch control circuit producing on or off control signals for the electronic switch. The present invention allows information inside the NFC chip to be accessed according to certain conditions, thus avoiding unnecessary operations while enhancing the security of information stored in the NFC chip.