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184results about How to "Achieve technical effect" patented technology

High-precision ultrasonic range-measuring system

The invention provides an ultrasonic range-measuring system which comprises a driving circuit, an ultrasonic probe, a return signal detecting circuit and a singlechip microcomputer, wherein the singlechip microcomputer is connected with the driving circuit, the driving circuit is connected with the ultrasonic probe, a detecting signal of the ultrasonic probe is output to the return signal detecting circuit, an output end of the return signal detecting circuit is connected with the singlechip microcomputer, an analogue switch is further connected between a signal output end of the ultrasonic probe and the return signal detecting circuit, when the singlechip microcomputer sends out a starting signal to the driving circuit, the analogue switch disconnects the connection of the return signal detecting circuit from the range-measuring system, when the singlechip microcomputer stops sending the starting signal to the driving circuit, the analogue switch connects the connection of the returnsignal detecting circuit in the range-measuring system, and the return signal detecting circuit is disconnected when an ultrasonic wave is sent due to the analogue switch with a single-pole double-throw function, so that the self-oscillation caused by the fact that a driving signal is input into a follow-up amplifying circuit can be avoided, and a blind zone detecting distance of the ultrasonic probe can be effectively reduced.
Owner:CHERY AUTOMOBILE CO LTD

Wireless communication device testability design method

ActiveCN105553754AAchieve control and observabilityAvoid disassembling the whole machine out of the boxData switching networksRadio frequencyUpgrade
The invention discloses a wireless communication device testability design method. The method includes performing functional unit division on a wireless communication device, including a voice and panel unit, a processor unit, a baseband signal processing unit, a radio frequency unit, a power amplifier unit, a filter unit and a backboard unit, wherein the voice and panel unit, the baseband signal processing unit, the radio frequency unit, the power amplifier unit and the filter unit are connected with the processor unit through respective control interfaces and data communication interfaces via the backboard unit, and the voice and panel unit provides a device internal unit program upgrade interface and maintenance interface to the outside. Main faults of each unit are automatically diagnosed when the device is powered on, a test command is input through the maintenance interface when a fault occurs, a test signal passes through each unit inside and realizes loopback gradually, and the faults of each unit are diagnosed automatically. The wireless communication device testability design method has the beneficial effects of utilizing hardware resources of the device itself, increasing test software to realize testability design of the device itself, accurately positioning the faults inside the device, and greatly reducing debugging and testing and maintenance guarantee cost of the device.
Owner:CHONGQING JINMEI COMM

Non-contact elevator button system

The invention discloses a non-contact elevator button system. The non-contact elevator button system comprises at least two elevator buttons adopting a non-contact registration mode, a construction unit, a judging unit and an identification unit, wherein the construction unit is used for constructing a moving track of an operation action executor according to operation information of the operationaction executor and/or operated information of the elevator buttons, the judging unit is used for judging whether any elevator button subjected to wrong registration operation exists or not accordingto the moving track or the moving track and the operated information of the elevator buttons, and the identification unit is used for identifying all elevator buttons subjected to registration operation according to the moving track or according to the combination of at least one of the operation information of the operation action executor and the operated information of the elevator buttons aswell as the moving track when any elevator button subjected to the wrong registration operation exists. According to the system, the cost is not increased, external space is not occupied, the appearance of a elevator button system is not affected, operation is easy and convenient, the elevator buttons are effectively prevented from being mistakenly subjected to the wrong registration operation, and the system is suitable for occasions with any number of elevator buttons and the situation that a plurality of operators register the elevator buttons at the same time.
Owner:SHANGHAI MITSUBISHI ELEVATOR CO LTD

Array turbulent flow column jet cooling device

The invention discloses an array turbulent flow column jet cooling device, and belongs to the technical field of radiators. The cooling device is provided with a housing, a cooling working medium inlet, a cooling working medium outlet and a turbulent flow column array. The front half section of the cooling device is multiple columns of rectangular channels at equal intervals, and the rear half section of the cooling device is a turbulent flow column array which is symmetrically arranged along the center. Through the jet impingement cooling technology, gas or liquid is directly jetted to a cooled or heated surface through a rectangular nozzle (inlet) under the action of pressure difference, so that the flow path is short and a flow boundary layer on the impacted surface is thin, and an areadirectly impacted generates a very strong heat exchange effect; and the turbulent flow column array is arranged on the rear half section of the cooling device, so that the heat exchange area of the device and fluid is increased, the flow boundary layer formed in the flow channels is damaged, disturbance in flowing is increased, and furthermore, the heat exchange enhancing effect is further achieved, and the temperature equalizing effect of the cooling device is greatly improved.
Owner:BEIJING JIAOTONG UNIV

Elevator detection device

The invention discloses an elevator detection device. The elevator detection device comprises a sensor group and a judging unit, wherein the sensor group at least comprises one sensor and is used fordetecting people and/or objects passing through an entrance and exit of an elevator car; the judging unit is used for judging whether people and/or objects pass through the entrance and exit of the elevator car or not according to detection signals output by the sensor group; the sensor group is mounted on a mounting seat at the upper part of the entrance and exit of the elevator car, the mountingseat is positioned on an elevator car body, and the sensor group is distributed along the width direction of a car door and is used for detecting people and/or objects passing through the entrance and exit of the elevator car from top to bottom; and a detection area of the sensor group comprises an area where an elevator car door is located, and the ratio alpha of the width of the detection areain the width direction of the car door to the width of the car door meets the condition that alpha is greater than or equal to 0.5 and less than or equal to 1. According to the elevator detection device, a vertical detection mode is adopted, so that the cost of the sensor and the complexity of installation and wiring are reduced, the width information of people and/or objects passing through the entrance and exit of the elevator car is directly and accurately detected, and the occupied area of the elevator car is obtained.
Owner:SHANGHAI MITSUBISHI ELEVATOR CO LTD

Method for in-situ measuring iron content in biological tissue sample by adopting isotopic dilution LA-ICP-MS (laser ablation inductively coupled plasma mass spectrometry)

ActiveCN103837592AEasy to addOptimize equilibration timePreparing sample for investigationMaterial analysis by electric/magnetic meansLaser ablation inductively coupled plasma mass spectrometryMicrocell
The invention discloses a method for in-situ measuring iron content in a biological tissue sample by adopting isotopic dilution LA-ICP-MS (laser ablation inductively coupled plasma mass spectrometry). The method comprises the following steps of building a sample boundary by adopting a tissue anti-dropping material for a biological section sample, and adding quantitative isotopic dilution agent in a boundary to adequately exchange isotope of the tissue sample; optimizing the addition way of the isotopic dilution agent, the isotopic balance time and the condition of the in-situ isotopic ratio measurement technology; in-situ measuring the iron content in the uniform tissue section sample of goat brain and beef liver by adopting the isotopic dilution-LA-ICP-MS technology, wherein the measurement result is consistent with that of the microwave digestion-isotopic dilution method. The method can be further applied to the in-situ and microcell quantitative measurement and imaging analysis of metal elements in the biological tissue section sample in clinical process, and an important clinical significance for establishing the connection between the distribution variation of iron element in the tissue sample and the typical neurological disease can be realized.
Owner:NAT INST OF METROLOGY CHINA
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