9results about How to "Guaranteed range" patented technology

The present invention relates to the technical field of dust suppression equipment, and discloses a dust suppression equipment for construction engineering, including a storage water tank, an output hose is fixedly provided on the upper end thereof, and a receiving assembly is fixedly provided on the output hose, and the receiving assembly is arranged inside a first air duct, and a second air duct is fixedly installed on the right side of the first air duct; a connecting assembly is arranged on the receiving assembly, and a fixed nozzle is fixedly provided on the upper end of the connecting assembly. The dust suppression equipment for construction engineering can drive the extension arc plate to move through the operation of the first telescopic rod, and at this time the connecting arc pad begins to shrink, so as to achieve the purpose of reducing the position of the air outlet, that is, to increase the pressure of the air flow, and ensure the range of the dust suppression cannon fog machine, and the extension arc plate can stay at any position, so as to achieve multi-level adjustment of the caliber of the air outlet, and as the energized coil is energized, the electrorheological fluid becomes solid, so as to achieve connection and fixation between the extension arc plates, and avoid deformation of the extension arc plates due to force.

The utility model provides a reciprocating driving mechanism of an abrasion testing machine and a testing device of the reciprocating driving mechanism, two vertical inner sides of a reciprocating frame of the reciprocating driving mechanism are provided with sliding chutes, a cross-shaped motion sliding block is arranged in the sliding chutes of the reciprocating frame, and an eccentric wheel is arranged in a mounting hole in the center of the cross-shaped motion sliding block; the eccentric shaft is connected with the eccentric wheel shaft hole; reciprocating shafts are arranged on the opposite outer sides of the reciprocating frame. The testing device comprises a rack, a heating base, a linear reciprocating assembly, a testing groove, a pressure loading assembly, a testing clamp and a driving motor. The linear reciprocating assembly is simple in structure, the amplitude of the reciprocating linear motion is guaranteed through the double-eccentric structure design of the eccentric shaft and the eccentric wheel, and the test reciprocating stroke is adjustable. The reciprocating friction-wear testing machine is used for testing under a material extreme pressure condition and an oil product extreme pressure condition. The equipment is attractive in overall structural design, convenient to operate, high in automation degree, good in equipment operation stability and high in test precision, the actual working condition state of a material is simulated, and the test accuracy is improved.

The application provides a hydrogen energy power system and a hydrogen energy vehicle with the power system, the hydrogen energy power system comprises a shell, a hydrogen storage device horizontally arranged in the shell, a fuel cell stack arranged in the shell and located below the hydrogen storage device, and a heat dissipation device arranged between the hydrogen storage device and the fuel cell stack. The hydrogen energy vehicle comprises the hydrogen energy power system mounted below a vehicle frame. The hydrogen storage device and the fuel cell stack are integrated in one shell, and the heat dissipation device directly blows heat, so that the waste heat generated by the fuel cell stack is fully utilized. Compared with the prior art in which the hydrogen storage device and the fuel cell stack are separately arranged in two shells, the distance of heat transmission from the fuel cell stack to the hydrogen storage device is reduced, the loss in the transmission of waste heat is reduced, the utilization rate of waste heat is improved, and the setting of a heating film is cancelled, so that the production cost and the operation energy consumption are reduced.

The invention provides a small-size delay network based on an SIP (Session Initiation Protocol) technology. The delay network comprises an amplifier, a delayer, a power divider, a switch and an equalizer, the radio frequency signal transmission sequence is as follows: four radio frequency input ends pass through four high-gain low-noise amplifiers; entering four delayers to complete the delay function of four branches; each path of radio-frequency signal is divided into two paths after passing through a single-pole two-throw switch, the two paths of radio-frequency signals are synthesized through a power divider, and the synthesized four paths of signals are selectively output through a single-pole two-throw switch; a delayer chip is arranged on the trunk; the radio frequency amplitude is compensated through an amplifier and an equalizer, and the whole delay network is arranged in a central symmetry mode. According to the invention, the radio frequency delay line chips are respectively arranged on the upper printed board and the lower printed board in the ceramic tube shell, the delay chips on the upper layer and the lower layer are interconnected through the solder balls, and the serial-to-parallel conversion chip and the delayer chip are directly bonded through the gold wire.

The application discloses a MEMS sound wave sensor with scalar and vector composite sensing and a manufacturing method thereof, and belongs to the technical field of micro-electro-mechanical systems. The piezoelectric film, the scalar lower lead wire area and the scalar upper lead wire area constitute a piezoelectric MEMS sensor for sensing scalar sound wave information; the upper plate vector lead wire area, the upper plate, the upper plate lower insulating layer, the upper plate limiting concave frame, the upper plate anti-collision convex point, the back-shaped upper cantilever beam group, the vector lead wire area, the back-shaped lower cantilever beam group, the mass block, the support frame, the lower plate upper insulating layer, the lower plate limiting concave frame, the lower plate anti-collision convex point, the lower plate, the lower plate vector lead wire area constitute a sandwich type differential capacitance MEMS sensor for sensing vector sound wave information. The application has the advantages of scalar and vector composite sensing, small volume, large range, high sensitivity, high reliability, high integration, low cost, low noise, stable performance and the like.

The utility model discloses a kind of side plate of battery module, battery module, battery pack and vehicle, the side plate of battery module includes: side plate main body and phase change material, first phase change material containing cavity and second phase change material containing cavity are formed in side plate main body, second phase change material containing cavity is located at the outside of first phase change material containing cavity in the thickness direction of side plate main body, second phase change material containing cavity is communicated with first phase change material containing cavity, phase change material is set to first phase change material containing cavity and is adapted to phase change and flow to second phase change material containing cavity when temperature reaches preset condition. By the phase change material in first phase change material containing cavity and second phase change material containing cavity, when being subjected to higher temperature, phase change material flows in turn, so that the side plate of battery module can effectively manage the heat generated by battery, which is beneficial to balance the temperature between battery and cockpit, can prolong the life of battery, can reduce the charging time of vehicle, and can ensure the rapid charging of vehicle.

The present invention discloses a high-precision fault inversion method with automatic feedback without static error. The method comprises the following steps: setting preset short circuit, grounding and anti-false operation fault scenarios, applying high-fidelity voltage and current signals on the primary side through software and hardware control, verifying the fault analysis, processing function and performance of the intelligent switch, and verifying the fault processing capability of a single device. At the hardware level, the fault inversion test system transfers the load side impedance to the source side through impedance transmission, controls the current using current feedback, drives a large current MOS tube to generate a nonlinear voltage to drive the load loop to obtain a high-precision primary signal through a fast-response automatic feedback control circuit without static error, and then obtains a high-precision measurement result by using a 2-way multi-channel high-precision synchronous sampling measurement method. At the software level, for steady-state signals, the primary output signal is sampled in real time, and the voltage, current and power sources are compensated and corrected according to the load difference of the switch to be tested. For transient signals, the voltage, current and power sources are periodically calibrated and adjusted for amplitude and phase in segments according to the current output range.

This invention discloses a control method and device for a cooling system of a pure electric vehicle. The method involves determining whether the electronic expansion valve of the passenger compartment and the electronic expansion valve of the battery are malfunctioning. If both electronic expansion valves are functioning correctly, the method determines whether the electric vehicle is in fast charging mode or normal driving discharge mode. If so, it determines whether the air conditioning is on. If on, the method compares the current battery temperature with different set temperature ranges to find the corresponding range's requested battery water pump speed. It also compares the current passenger compartment air conditioning set temperature with different set temperature ranges to find the corresponding range's requested motor water pump speed. Based on the requested battery water pump speed and the requested motor water pump speed, the method determines the compressor speed. Finally, it uses the ratio of the requested motor water pump speed to the compressor speed to determine the opening degree of the passenger compartment's electronic expansion valve and the ratio of the requested battery water pump speed to the compressor speed to determine the opening degree of the battery's electronic expansion valve.

A contact type grating displacement sensor provided by the present invention comprises a housing, and a photoelectric detection chip, a probe and a driving mechanism which are arranged in the housing, the probe is provided with a scale grating, the driving mechanism drives the scale grating and the probe to move out of the housing along a measurement direction, and the photoelectric detection chip projects a light source to a corresponding area on the scale grating. The scale grating reflects an optical signal for representing a corresponding area back to the photoelectric detection chip, and the relative position relation between a light source projected by the photoelectric detection chip and the shell is fixed; the moving distance of the scale grating is determined according to an optical signal detected by the photoelectric detection chip, and the moving distance of the probe from the shell is determined according to the moving distance of the scale grating and the relative position relation between the scale grating and the probe, so that the distance between the fixed surface of the contact grating displacement sensor and the surface to be measured in the measuring direction is determined. According to the invention, the measuring range size ratio of the sensor probe breaks through the limitation of traditional 0.5, and the volume compression of the sensor is realized.