67results about How to "Avoid accidental switching" patented technology

A work-vehicle cabin having an air-conditioning unit is disclosed. The cabin includes a roof unit, a downwardly bulging ceiling portion constituting a part of the roof unit, a heater provided in the ceiling portion, an evaporator provided in the ceiling portion and arranged adjacently rearwardly of the heater, and a pair of forward air-supply openings provided in the ceiling portion and respectively disposed laterally of the heater for feeding conditioned air to the inside of the cabin.

An electronic circuit includes a microcontroller processor (410), a peripheral (420) coupled with the processor, an endian circuit (470) coupled with the processor and the peripheral to selectively provide different endianess modes of operation, and a detection circuit (140) to detect a failure to select a given endianess, whereby inadvertent switch of endianess due to faults is avoided. Other circuits, devices, systems, methods of operation and processes of manufacture are also disclosed.

The invention relates to an IEC (integrated Ethernet chip) 104 communication host-standby switching method under high redundancy configuration. A first monitoring system server and a second monitoring system sever which are adopted as monitoring systems of a master station are divided into a host machine and a standby machine; and four ports of the host machine and the standby machine are named as A1, A2, B1 and B2 respectively, wherein, one of the four port is a main port, the other three ports are standby ports, the four ports are peer-to-peer, and the switching sequence of control right isA1,A2, B1, B2, A1, A2..., thereby forming a logical ring. A channel state and a control right belonging state which are needed when the four ports of the monitoring system are switched are obtained from a real time database of the monitoring system, the port is suspended for preset time after the control right is received, and then the control right is switched. Data is all broadcasted firstly and is written into the real time database by a broadcast. The IEC 104 communication SOE (sequence of event) data is ensured to be transmitted in each channel simultaneously by the policy provided by the method under the configuration with two host machines and four channels of the monitoring system, and the consistency and the integrality of the IEC104 communication data can be ensured under all conditions.

The invention discloses a method for cell handover in a TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) system and a device for the cell handover in the TD-SCDMA system. The method comprises the following steps of: acquiring the RSCP (Received Signal Code Power) measured value of a current cell and the RSCP measured value of each neighbor cell of the current cell; selecting neighbor cells respectively with an RSCP measured value larger than that of the current cell as target cells to be handed over; determining the priority of each of the target cells to be handed over according to the size of the RSCP measured values corresponding to the target cells to be handed over; and determining handover target cells from the target cells to be handed over according to the priorities of the target cells to be handed over, and the size relationship among corresponding cell signal quality measured values and preset threshold values, and carrying out cell handover. In the invention, the RSCP measured values and the cell signal quality measured values are adopted to judge whether the neighbor cells of the current cell meet cell handover or not, thereby achieving the aim that the cell mistaken handover is avoided by using the cell signal quality measured values when the RSCP measured values are inaccurate or on the high side due to the fact that interference exists in a frequency point where the cell is located.

The invention relates to an electromechanically switchable form-locking freewheel mechanism for preventing an electromechanical brake from releasing. According to the invention, the freewheel mechanism is embodied in the form of an electric motor in which a pivot angle of the armature is limited, the armature is counterbalanced and has a locking element that cooperates with a gear. The invention permits a compactly designed freewheel mechanism that can be integrated into an electromechanical actuating unit of the electromechanical brake. The counterbalancing of the armature equipped with the locking element prevents external accelerations of the freewheel mechanism of the kind that can occur during driving operation of a motor vehicle from exerting a moment on the armature that could switch off the freewheel mechanism. A method for adjusting the clearance of an electromechanical brake is also provided.

The invention provides a method and device for switching a network device from a stand-by state to a main state and the network device. The method and device are applied to a network comprising a three-layer network and a two-layer ring network. A first three-layer network device and a second three-layer network device of the three-layer network are connected with a two-layer network device in the two-layer ring network, and a three-layer protection protocol is operated. The first three-layer network device is in the main state, and the second three-layer network device is in the stand-by state. The method comprises the steps that after a TC message is received, the second three-layer network device is switched from the stand-by state to a stand-by-to-main delay state, and if a heartbeat message of the three-layer protection protocol is not received within a first set time period, the second three-layer network device is switched from the stand-by-to-main delay state to the main state. Through the scheme, the second three-layer network in the stand-by state can be prevented from being switched to the main state mistakenly.

The invention relates to the technical field of hemispherical resonator gyro control, in particular to a working mode switching control method and system of a hemispherical resonator gyro. The control method comprises the following steps: calculating the angular acceleration of the current hemispherical resonator gyro and filtering; if the angular acceleration is greater than 0 and the angular velocity absolute value is less than a first judgment threshold, or the angular acceleration is less than or equal to 0 and the angular velocity absolute value is less than a second judgment threshold, entering a force balance mode; applying a control force Cp according to a force balance PID controller to keep the standing wave position of the harmonic oscillator still, and calculating and outputting the angular velocity; if the angular acceleration is less than or equal to 0 and the angular velocity absolute value is greater than or equal to a second judgment threshold, or the angular acceleration is greater than 0 and the angular velocity absolute value is greater than or equal to a first judgment threshold, entering a full-angle mode; cutting off the control force applied by the force balance loop according to the force balance PID controller to enable Cp to be equal to 0, and calculating and outputting angular velocity increment; hybrid control of a force balance mode and a full-angle mode is realized according to the input angular velocity of the carrier.

The invention discloses an air tightness detecting device and a servo control method thereof. The air tightness detecting device comprises a first gas source, a first pressure sensor and a first proportional servo valve. The first gas source and the containing cavity of a first object to be detected are connected by a first proportional servo valve. The first pressure sensor is connected to the containing cavity of the first object to be detected and is used for detecting the pressure in the containing cavity of the first object to be detected so as to judge the air tightness of the containing cavity of the first object to be detected. The first pressure sensor is also connected to the first proportional servo valve and is used for adjusting the state of the first proportional servo valve. Through improving control loop design and a server control process, the problems of the low accuracy of a direct pressure testing method and the inconvenient operation of a differential pressure test method are solved effectively, according to the device and the corresponding servo control method, the opening of an electro-pneumatic proportional servo valve is controlled through a closed-loop system to control the flow of gas in the loop, and the air tightness of the system can be detected.

An improved leash device for pets that includes a tongue for insertion into a seat belt is described. The tongue may be designed to fit any vehicle safety belt buckle to allow a user to secure their pet to their vehicle for travel. The user may operate the device by moving a safety belt tongue from inside the housing of the leash device. When the tongue is moved outside the housing, it may be inserted into the buckle attached inside the vehicle to keep the pet safe during vehicle movement. The leash device may also include a retractable leash mechanism with a lock button for alternatively allowing or preventing the extension/retraction of the leash. A button hood may be provided to prevent accidental toggling of the lock button.

The invention relates to an electric generator static excitation device multi-slave redundancy protection method. A host machine, a standby machine and a slave machine are adopted for realizing redundancy protection, and are connected with one another by adopting a CAN bus; the redundancy protection is characterized by automatically switching to the standby machine or the slave machine when the host machine is failed, and switching to the slave machine only if the standby machine is stayed in a failure state; automatically switching to the host machine or the slave machine when the standby machine is failed, and switching to the slave machine only if the host machine is stayed in a failure state; switching to the host machine or the standby machine from the salve machine only if the host machine or the standby machine is stayed in a non-failure state, otherwise, switching the slave machine to a next stage or ignoring the slave machine. The electric generator static excitation device multi-slave redundancy protection method provided by the invention has the beneficial effects that through a multi-slave redundancy switching mode, a control unit and a power unit are integrated, the simplicity and the convenience in switching are realized, the switching is undisturbed switching, meanwhile, the convenience in maintenance without power failure is realized, and when failure happens, the slave machine can replace the host machine in the same valve position.

The invention discloses a process method of GSM cell switching, comprising the steps of: judging whether the cell is taken as a candidate switching object cell according to that whether the duration time that the receiving level of the adjoining cells is higher than a preset value is over a set threshold value T; and if the duration time is over the threshold value T, the cell is taken as the candidate switching object cell. The invention also discloses a process system of GSM cell switching. By judging whether the duration time that the receiving level of the adjoining cells is higher than the preset value is over the set threshold value T when switching, the invention can prevent from taking the cell which generates short strong signals caused by signal leakage and drift under some special scenes to be as the candidate switching object cell, thus preventing from error switching caused thereby.

A yarn winding apparatus and an operation original location adjusting method are provided, the winding unit as an operation unit which includes the opening and closing member, the guide screw, bolt, the movable cylinder, connector means for guiding the upper yarn catching member, the lower yarn capture guide member and the gate line, so that these movements and operation of winding the yarn winding operation mode, and for maintenance operation portion is stopped leaving a pattern in maintenance mode operation. In a winding unit, in the winding from the maintenance mode to the operation mode for the take-up unit is the operation of the operation unit to adjust the home position, and then starts winding the yarn. In addition, when having a plurality of winding units of an automatic winder a power is turned on, all of the winding unit, for the operation of the operation unit to adjust the origin position. A plurality of operation unit to adjust the operation of the home position is not the same time, and each part to a predetermined order.

The invention relates to a frequency point switching method and a device, a storage medium and wireless equipment, and aims to accurately perform frequency point switching to avoid interference and effectively reduce wrong switching. The frequency point switching method comprises the following steps: determining parameter values of an electromagnetic environment where a transmitting end and a receiving end are located currently, wherein the parameter values at least comprise a signal-to-noise ratio (SNR) actual value and a receiving power actual value Pr of the receiving end; determining a receiving power theoretical value in a no-interference environment and a signal-to-noise ratio theoretical value in the no-interference environment on the condition of the current actual distance betweenthe transmitting end and the receiving end; and triggering frequency point switching when the difference value between the signal-to-ratio theoretical value and the signal-to-ratio actual value exceeds a signal-to-noise ratio error allowable range Sc and the difference value between the receiving power theoretical value and the receiving power actual value Pr is in a receiving power error allowable range Pc, so that the working frequency points at the receiving end and the transmitting end are synchronously switched to a target frequency point.

The invention discloses a multi-client node-based system instruction authority switching method. Researches on safe switching, especially switching of system instruction authority in multi-operation terminal application fields such as the naval architecture and ocean engineering industry are rarely disclosed. The method includes the following specific steps of: client node configuration and networking; instruction authority state identification of each client node which includes the steps of instruction authority acquisition and instruction authority rendering; and instruction authority switching which further includes the step that each client node on the Ethernet performs instruction authority request and transfer according to actual operational needs. According to the multi-client node-based system instruction authority switching method of the invention, application configuration of existing terminals are not needed to be largely modified, and instruction authority switching can be transplanted based on the configuration of actual application systems.

Embodiments of the invention disclose an Internet protocol security (IPSEC)-based tunnel switching method and device, and a gateway. The method comprises the steps that the gateway detects a state ofa main tunnel, if the main tunnel is in an abnormal state, the gateway waits for a preset time period; then the gateway detects a state of the main tunnel again; and if the main tunnel is in the abnormal state, the main tunnel is switched to a standby tunnel. Through adoption of the tunnel switching method, false switching caused by network shock and other states can be prevented, main tunnel-based communication is continued as much as possible, unnecessary switching consumption is reduced, and adaptive adjustment and other problems caused by switching are solved.

The invention provides a brake system which includes a first processing unit for receiving an emergency brake signal when a vehicle is in a first driving mode, and a second processing unit for receiving an emergency brake signal when the vehicle is in a first driving mode. A brake control unit, configured to process the target braking force to obtain motor control information, and to operate according to the motor control information to generate brake pressure; A brake oil circuit for pressing out the brake fluid according to the brake pressure; An actuator for pushing the emergency braking ofthe vehicle according to the brake fluid; A brake pedal for receiving the pressing information; The brake control unit is further configured to compare the force information with a preset force threshold value and switch the vehicle from the first driving mode to the second driving mode when the force information is greater than the preset force threshold value; An acceleration sensor connected to the actuator for obtaining speed information when the vehicle is braked. Thus, when braking, the driving mode is quickly switched, and the safety mechanism at the time of switching avoids the occurrence of misswitching, and has a feedback mechanism.