34 results about "Passive resistance" patented technology

The invention discloses a detection method of the passive resistance of an electronic device. According to the detection method, a reasonable tap position of an adjustable resistor is selected according to the theoretical range of testing resistance; collection and measurement are carried out at fixed time points; when resistance in different range intervals is measured, the adjustable resistor is switched to a different tap position; a direct-current alternating measurement method is adopted to further improve the accuracy of the resistance according to the selected tap position; and finally, with two methods mentioned in descriptions of the invention used in combination, the resistance value of the electronic device is calculated through adopting a curve fitting method. With the detection method provided by the technical schemes of the invention adopted, measurement accuracy and precision can be ensured. The detection method has a high engineering application value.

Design methods for the bearing capacity of prestressed concrete structures. In the existing design methods of statically indeterminate prestressed concrete structures, it is difficult to determine the influence of the confinement structures such as columns, walls, and tubes on the prestressed concrete structure and the influence on the design calculation results. A bearing capacity design method for prestressed concrete structures, which distinguishes concrete structures with infinite side structures and concrete structures with limited side structures, and introduces the lateral limit influence coefficient; calculates the cross-sectional area of ​​longitudinal prestressed tendons in the tension zone; determines by The sum of the bending moment value caused by tensioning the prestressed tendon and the design value of the external load bending moment of the control section; the establishment of the effective prestress from the tension to the prestressed tendon; the design value of the tensile strength of the prestressed tendon is higher than the effective prestress Provide resistance partially passively; calculate the bearing capacity of the normal section of the rectangular prestressed concrete flexure member in the unconfined structure; introduce the influence coefficient of the confinement for correction, and obtain the normal section load capacity of the rectangular prestressed concrete flexure member in the confined structure Force calculation formula. The invention is applied to the bearing capacity design of the prestressed concrete structure.

Disclosed is a semi-passive resistance force control system with active augmentation, which is suitable for a sport equipment with a pulling part. This semi-passive resistance force control system with active augmentation comprises a resistance force module, an energy neutral apparatus, and a control module. The energy neutral apparatus can not only provide an output resistance force to the pulling part when the pulling part is pulled by a user, but also reduce the variation of the output resistance force. The control module is able to accept the sensing data delivered by the internal sensors of the semi-passive resistance force control system with active augmentation to passively compensate the output resistance force and make it fixed. Furthermore, the control module can also provide an active adjustment to the output resistance force based on a preset control mode such that the user can experience a desired resistance force.

The invention discloses a method, a device and a system for realizing signal transmission with low power consumption and carrier suppression correction. The method comprises the following steps: analog baseband signals are sent to a transmission low-pass filter, and out-off-band harmonic waves are filtered by the transmission low-pass filter to be output in a mode of low-frequency signals; a direct-current correction module acquires the low-frequency signals output by the transmission low-pass filter and calibrates the low-frequency signals output by the low-pass filter according to the information of the acquired low-frequency signals; the transmission low-pass filter sends the calibrated low-frequency signals to a transmitter mixer, and the transmitter mixer carries out up-conversion treatment on the low-frequency signals and outputs radio-frequency signals; and a passive resistance array attenuator controls the power of the radio-frequency signals output by the transmitter mixer and transmits the radio-frequency signals. In the method, the device and the system provided by the invention for realizing carrier suppression, the passive resistance array attenuator is adopted to realize the purpose of controlling signal power, and the signal power does not need to be biased by current, thereby greatly reducing the power loss.

The invention proposes a preparation method of a passive resistance-capacitance element of an LCP flexible substrate, electroplating a Ni / Pd / Au layer on the copper-clad surface of a clean LCP substrate, sputtering a thin-film resistance layer and a conduction band layer on the copper-clad surface, and performing electroplating , photolithography, wet etching to prepare the resistance and conduction band, and then use the lift-off process to make a capacitor layer on the LCP substrate, and finally sputter the thin film conduction band layer on the surface, and perform electroplating, photolithography, wet method Etching, making the upper electrode and conduction band of the capacitor, and completing the preparation of the passive resistance-capacitance element of the LCP flexible substrate. The manufacturing method utilizes thin-film sputtering technology, which can simultaneously produce thin-film resistors and thin-film capacitors on the LCP substrate at one time, and can also fabricate thin-film resistor-capacitance networks to realize thin-film integration and high-precision control of resistor-capacitor components. The embedding of passive resistance-capacitance components in the device LCP system-in-package can greatly save the surface space of the LCP flexible substrate and increase the assembly density of the substrate.

The invention discloses a high-precision passive resistance generator for compensating hardware error influence. The high-precision passive resistance generator comprises a main control unit, a resistor network and a resistance measuring unit, wherein the resistor network and the resistance measuring unit are connected with the main control unit; the resistor network comprises M serially connected resistors, M normally closed relays which are connected with the resistors in parallel, and M relay driving circuits for controlling corresponding relays to be opened and closed; the relay driving circuits are connected with the main control unit; the main control unit is used for receiving resistance of the resistors in the resistor network and used for confirming an optimal resistance combination mode N by using a hardware error compensation method according to preset resistance R; the resistance is measured by the resistance measuring units; corresponding relays are controlled by the relay driving circuits to be opened and closed, resistors which are connected in parallel correspondingly are in an opened or short circuit state, and passive resistance can be output to compensate hardware error influence. By adopting the high-precision passive resistance generator, the problems that the output precision of a conventional passive resistance generator completely depends on resistance precision and is low in output precision are solved, and the requirement on the precision of a passive resistor in practical use can be met.