9results about How to "Control access" patented technology

The invention discloses a chip security access control method, device and system and a chip. The control method comprises the following steps: when the chip is coupled with access equipment through a debugging interface, detecting an access request through the debugging interface and acquiring an access object of the access request; obtaining a first verification key or a second verification key based on an access object of the access request, and executing first verification or executing second verification based on the first verification; wherein the first verification key and the second verification key are generated based on a unique user identifier of an electronic device of the chip, the first verification key is associated with the first safety circuit, and the second verification key is associated with the second safety circuit; and controlling the first safety circuit or the second safety circuit to be switched on or switched off according to a result of the first verification or the second verification.

This invention provides a pump pit structure, an underground water-sealed cavern, and a construction method for the underground water-sealed cavern, belonging to the technical field of underground water-sealed caverns. The pump pit structure includes a top-opening water collection trough and an oil collection trough. The water collection trough includes a sloping trough and a main trough; the sloping trough is connected to the main trough along a downward slope. The oil collection trough is located within the main trough, with its top higher than the top of the water collection trough. By designing the pump pit as a sloping trough and a main trough, the effective volume of the pump pit is divided into two parts. The sloping trough gently slopes downwards along the cavern floor, reducing the vertical wall excavation height of the pump pit while providing most of the effective volume, ensuring efficient and normal operation of the underground water-sealed cavern throughout its entire operating cycle. The main trough is located at the bottom of the sloping trough, with a depth meeting the height requirements of submersible pumps and submersible oil pumps. Compared to traditional pump pits, this design reduces the width of the deepest vertical excavation, lowering the excavation workload and construction difficulty of vertical pump pits.

A storage device includes a memory device and a storage controller including a security management module to manage security data of the storage device. The security management module includes a security manager to receive a command related to the security data, determine a current security mode of the storage device in response to receiving the command, and control access to the security data based on the current security mode. The current security mode includes one of a first security mode in which the security manager allows access to the security data, a second security mode in which the security manager allows limited access to the security data, and a third security mode in which the security manager prevents access to the security data.

The utility model discloses fishlight complementary cultivation tail water treatment equipment relates to tail water treatment technical field, including the aquaculture pond and the drain pipe, the outer surface fixed mounting of drain pipe has fixed cylinder no.

The application discloses a kind of fuel cell hydrogen content test method and system.The method is applied to the low-pressure hydrogen control module of fuel cell, the low-pressure hydrogen control module includes hydrogen tank, hydrogen control valve, hydrogen circulating pump, electric pile anode inlet pipeline and electric pile anode outlet pipeline, electric pile anode outlet pipeline is communicated with electric pile anode inlet pipeline by hydrogen circulating pump.The above-mentioned test method includes: obtaining the content ratio of hydrogen and nitrogen in electric pile anode outlet pipeline, and is recorded as first ratio;Obtain the content ratio of hydrogen and nitrogen in electric pile anode inlet pipeline, and is recorded as second ratio;According to first ratio, second ratio and electric pile hydrogen consumption, the amount of hydrogen in electric pile anode outlet pipeline is calculated;According to the amount of hydrogen in electric pile anode outlet pipeline, the exhaust amount of electric pile anode outlet is controlled.The application can quantitatively measure the content of hydrogen in electric pile anode outlet pipeline (hydrogen circulating pipeline), and provide data support for the exhaust strategy of fuel cell.

The utility model discloses a vocal music exerciser of auxiliary breath practice relates to vocal music exercise technical field, and this vocal music exerciser, including fixed cylinder, the inner wall sliding connection of fixed cylinder has movable cylinder, the inner wall screw thread connection of movable cylinder has the air inlet, the outer wall fixed connection of fixed cylinder has the air outlet, the top of air outlet is connected with sealing cover through screw thread, the outer wall of air outlet is seted up with the scale, and the bottom of air outlet is provided with the air outlet. The utility model discloses through fixed mechanism and positioning mechanism cooperation, has reached the effect that can split the device, cleans inside, through the restriction of canceling positioning mechanism to fixed mechanism, then can adjust fixed mechanism, make fixed mechanism no longer with connecting block connection, then can split fixed cylinder and movable cylinder, clean the inner wall of fixed cylinder and movable cylinder.

The application discloses a vehicle, a control vehicle passing method and equipment, and belongs to the technical field of vehicles. The distance measuring system in the vehicle comprises a control equipment, a first radar sensor and a second radar sensor. The first radar sensor determines a first time length used for emitting a first laser signal to receiving a first laser signal reflected by a first obstacle. The second radar sensor determines a second time length used for emitting a second laser signal to receiving a second laser signal reflected by a second obstacle. The control equipment determines position information of the first obstacle and the second obstacle based on the first time length and the second time length. The second distance is determined based on the position information of the two obstacles and the first distance. In the case that the vehicle body width is less than the second distance, the vehicle is controlled to pass. Compared with judging the distance between the obstacles on both sides by visual observation, the system can accurately determine the distance between the obstacles on both sides, so that the vehicle passing is more accurately controlled.

The application discloses a fluorescent whitening agent wastewater treatment device, including a treatment box, a water inlet mechanism is installed through one side of the treatment box, for wastewater to enter the inside of the treatment box, the setting of the filter mechanism can realize multi-stage efficient filtration, when the supernatant is extracted, the micro-impurity filter plate will play a role first, which is arranged in a plurality of through holes in the bottom of the inner sliding shell, can accurately intercept the small flocculation in the wastewater, effectively block these small flocculation into the subsequent filtering link, the water filtered by the micro-impurity filter plate will enter the filter cover, the filter screen on the top of the surface of the filter cover can further screen the possible residual impurities in the water, and the reset spring and the baffle in the inner cavity top of the filter cover can be adjusted according to the water pressure when the water is extracted, when the water pressure changes, the baffle slides in the filter cover, controls the inflow and outflow of water flow, ensures the stability and efficiency of the filtering process.

The utility model discloses a dry granulator with heat protection function, and a plurality of cooling cavities are arranged along the long axis direction of the compression roller inside the compression roller, one end of the compression roller is provided with a water inlet cavity in communication with one end of the cooling cavity, the other end of the compression roller is provided with a water outlet cavity in communication with the other end of the cooling cavity, a thermometer is arranged on the compression roller body to detect the temperature of the side of the compression roller close to the water outlet end, the surface of the compression roller is provided with an air cooling cleaning mechanism to clean the adhesive on the surface of the compression roller, the thermometer detects the temperature of the side of the compression roller close to the water outlet end, which avoids the high temperature of the compression roller close to the water outlet end and the easy occurrence of the adhesive phenomenon, and the water inlet amount and speed can be controlled conveniently, so that the compression roller has a good cooling heat protection effect.