53results about How to "Does not increase hardware costs" patented technology

The invention relates to a cascading-type STATCOM (Static Synchronous Compensator) DC (Direct Current) side capacitor voltage balance control method. In the control method, the direct current control and the indirect current control are combined. The method comprises the following steps: generating an active current reference value; selecting a special bridge; generating an STATCOM output current reference value; carrying out indirect current control of the special bridge; and carrying out direct current control of a non-special bridge. The control method provided by the invention is used for controlling the cascading-type STATCOM DC side capacitor voltage balance. The method not only ensures the balance of a DC capacitor voltage between H bridges and improves the response speed of a control link and optimizes the system performance, but also does not require an additional hardware circuit and cannot ensure the hardware cost of a STATCOM device to be increased.

The invention discloses electronic equipment, mobile communication equipment and a remote control device. The electronic equipment comprises a mobile communication equipment main body and the remote control device, and the equipment main body comprises a multi-contact touch screen, a first communication interface and a remote control unit, wherein the multi-contact touch screen is used for displaying information and inputting signals including touch signals; the first communication interface is positioned on the lateral surface of the equipment main body, and the first communication interface and the remote control device are connected by insertion; and the remote control unit is connected with a display unit, an input unit and the first communication interface and used for generating or finding remote control coded data corresponding to the input touch signals, sending the remote control coded data to the remote control device through the first communication interface and controlling the remote control device to send remote control coded signals corresponding to the input touch signals to controlled external equipment. The cost can be lower, and the mobile communication equipment can be more conveniently and effectively used for carrying out wireless remote control on the controlled external equipment.

The invention relates to a control system and control method of a distributed storage cabinet. The control system comprises a master controller (10), auxiliary controllers (12a, 12b and 12n) connected with the master controller (10) through an RS485 communication bus in parallel, executing and sensing components in signal connection with the auxiliary controllers (12a, 12b and 12n) respectively and a system power supply circuit. The control system is characterized in that a parallel connection direct communication mode, a series connection relay communication mode and reset control signal lines exist between the master controller (10) and the auxiliary controllers (12a, 12b and 12n) and among the auxiliary controllers (12a, 12b and 12n) at the same time. By means of the control system and control method of the distributed storage cabinet, if one auxiliary controller gets into communication failure, the fault can be automatically judged immediately, and the function of the RS485 communication bus is recovered. If one auxiliary controller gets into other functional faults, front equipment of the auxiliary controller can find the faults in time, the auxiliary controller is restarted, and therefore the function of the auxiliary controller is recovered.

The invention discloses a radio play channel updating method and device, and the method comprises the steps: determining the switching of a terminal from a first region to a second region, and determining that the intensity of a signal received by the terminal in the first region from a radio station is less than a preset threshold value after the terminal is switched to the second region, wherein the frequency bands supported by the terminal in the first and second terminals are different; searching a radio station in the second region, wherein the type of the radio station is the same as the type of the radio station listened to in the first region, and carrying out the play updating through employing the same type of radio station. According to the technical scheme of the invention, the method can achieve the instant switching of the same type of radio stations with no need of manually searching the channels, is simple and practical, and does not cause additional hardware cost.

The invention discloses a vehicle control method, device and plant and a terminal. The method includes the steps that the distance between an own vehicle and a target vehicle and the relative speed ofthe own vehicle and the target vehicle are obtained; the operation vehicle speed and the actual decelerated speed of the own vehicle are obtained in real time; whether the operation vehicle speed ofthe own vehicle meets a first preset condition or not is judged; if the operation vehicle speed of the own vehicle meets the first preset condition, according to the distance between the own vehicle and the target vehicle, the relative speed of the own vehicle and the target vehicle and the actual decelerated speed of the own vehicle, the second target decelerated speed of the own vehicle is obtained through calculation; and correspondingly, according to the second target decelerated speed and the actual decelerated speed of the own vehicle, the own vehicle is controlled. When the vehicle is at a low speed, the vehicle is smoothly braked through the own vehicle second target decelerated speed obtained through calculation conducted according to the distance between the own vehicle and the target vehicle, the relative speed of the own vehicle and the target vehicle and the actual decelerated speed of the own vehicle, and the actual decelerated speed of the own vehicle; and the deceleration smoothness and the response instantaneity of the vehicle are guaranteed.

The invention discloses a signal frequency measuring method based on a period tracking method and a mobile integer period method. The signal frequency measuring method comprises the specific steps that first, the timer frequency f[clk] and an allowed measuring error epsilon are set; second, if the upper limit f[max] of a measured signal frequency f is unknown, the mobile integer period method is used for measuring the signal frequency, and if the upper limit f[max] of a measured signal frequency f is known, whether the f[max], the f[clk] and the epsilon meet the relational expression that f[max] is smaller than f[clk]*epsilon is judged, if yes, the period tracking method is used for measuring the signal frequency, and if not, the mobile integer period method is used for measuring the signal frequency. The period tracking method can update the measuring result in time when detecting the situation that the signal period is prolonged, and the mobile integer period method achieves the effect that the measuring result is updated at least one time in each signal period. The period tracking method and the mobile integer period method can track the changing process of the signal frequency faster, the hysteresis error is reduced, the requested number of timers is not increased, the calculation amount is small, only a small amount of memory variable needs to be added, and therefore the hardware cost of a frequency testing device cannot be increased.

The embodiment of the invention discloses a method and a device for improving the stability of an embedded Linux system. Abnormal condition detection is carried out on the embedded Linux system in therunning period by setting a system detection script, if the abnormal condition occurs, formatting processing is performed on the abnormal partition, and data recovery is performed, so that the downtime of the embedded Liunx system can be greatly reduced, the reliability of the system is greatly improved, and the maintenance cost is reduced. According to the scheme of the embodiment of the invention, the maintenance cost can be reduced, and the corresponding hardware cost cannot be increased due to the adoption of software detection implementation.

The invention discloses a hybrid power automobile high-pressure system electric leakage fault diagnosis device and method. The high-pressure system comprises a direct-current converter, a starting and generating integrated motor and a lithium battery, the positive electrode of the starting and generating integrated motor is connected with the positive electrode of the direct-current convert and the positive electrode of the lithium battery separately, and the negative electrode of the starting and generating integrated motor, the negative electrode of the direct-current converter, the negative electrode of the lithium battery are grounded separately; the device comprises a system controller which is connected with the direct-current converter, the starting and generating integrated motor and the lithium battery through a CAN bus separately, the system controller receives a current Ib of the lithium battery, a current Im of the starting and generating integrated motor and a current Id of the direct-current converter in real time through the CAN bus, the vector sum of the current Ib, the current Im and the current Id is calculated, an absolute value Isum is obtained, and the system controller diagnoses the severity of electric leakage according to the size of the absolute value Isum. The hybrid power automobile high-pressure system electric leakage fault diagnosis device and method can prevent car burning accidents.

The invention relates to the field of satellite navigation, and discloses a satellite navigation trusted position service method. The method comprises the following steps: S1, arranging navigation messages according to a satellite navigation system interface control file; S2, according to a self-defined coding format, filling information identification in the navigation messages, or filling the information identification by utilizing the time gap of broadcasting the navigation messages; and S3, generating and transmitting a satellite navigation enhancement signal which can be received by a satellite navigation receiving terminal according to the satellite navigation system interface control file. According to the method, navigation enhancement signals are generated and transmitted in accordance with a true satellite navigation signal format, and reserved and/or blank bits in the satellite navigation signal navigation messages are used as information identification; and after the navigation terminal receives the navigation enhancement signal, the navigation terminal demodulates the information identifier and gives the information identifier to the application software, and the application software decodes the information identifier to acquire the position and/or the related information so as to realize the service function based on the trusted position.

The invention relates to a method for testing a conducted interference characteristic simulation model based on a power electronic transformer system. The method comprises the following steps: establishing a system rectifier stage model; establishing a system isolation level model by adopting a double-active-bridge DC/DC converter structure through a phase shift control method; constructing an operation simulation model in simulation software through the system rectification-level model and the system isolation-level model; considering a high-frequency model of a passive device in the power electronic transformer system, extracting main parasitic parameters in the circuit structure, and establishing a high-frequency simulation model of conduction interference of the power electronic transformer system; arranging a first resistance-capacitance branch and a second resistance-capacitance branch in the high-frequency simulation model to measure conducted interference. Compared with the prior art, the simulation test of the conducted interference can be conveniently and quickly carried out on the PET system comprising two or more power conversion links, meanwhile, the conducted interference characteristics independently generated by different power conversion links in the same system can also be tested, and the accuracy is high.