The paper introduced an untouched method—ultrasonic distance measurement that is used to obtain the crop height.
介绍一种使用非接触式测量方法—超声测距法对作物高度进行测量的装置。
An ultrasonic distance measurement system controlled by the MCU of PIC16F876is described.
详细地介绍了一种由PIC 16f876单片机控制的实时超声波测距系统。
A new method for ultrasonic distance measurement based on ultrasonic circulation and multi pulse echo principle is presented in the paper.
本文介绍了一种基于超声波循环反射测量原理的高精度超声测距方法，并给出了以单片机为核心的测距系统的组成。
Digital correlation approach is used to find the time of flight (tof) in ultrasonic distance measurement.
采用数字相关的方法确定超声波测距中的渡越时间。
The principle of ultrasonic measuring distance in the air was analyzed. A method of improving the measurement precision by correcting transmission speed with inspecting temperature was put forward.
分析了空气中超声波测距原理，提出了通过温度测量修正超声波传播速度，提高空气中测量精度的方法。
Based on the theory of Zero-wave plane and the theory of Ultrasonic distance-measurement, introduces the ways how to measure the ship heaving signal according to the rule of 3-point forming a plane.
基于零波面理论，利用超声测距原理，介绍了3点定面测量船舶升沉位移的方法，设计了一种新型深海采矿船升沉信号采集系统。
Based on the idea, the circuit and software of ultrasonic distance measurement system have been designed.
在此基础上，设计了相应的超声波测距系统电路和软件。
This paper is designed having introduced that ultrasonic distance measurement technology-based interior of one kind fixer system mainly.
本文主要介绍了一种基于超声波测距技术的室内定位系统的设计。
Studies are made on the embedded systems and ultrasonic distance measurement system.
研究了一种基于嵌入式系统和超声波测距系统的设计方案。
Distance measurement is realized by ultrasonic sensors, light intensity detection is achieved by photosensitive element, timer function is realized by 89c52's timer.
测距是利用超声波传感器来实现，光强检测是通过光敏元件实现，定时功能由89c52单片机定时器实现的。
Use of ultrasonic distance measurement principle, due to low cost, high accuracy, proposed one kind based on the AT89S52ultrasonic reversing radar of the system design.
利用超声波测距原理，出于低成本、高精度的目的，提出了一种基于AT 89s52的超声波倒车雷达系统的设计方案。
PRBS is applied in ultrasonic distance measurement in this article, which resolves some problems existing in it.
本文将伪随机码应用于超声波测距中，解决了超声波测距中存在的测距精度低和测量距离近的问题。
Then, the design of the detection system in borehole of the mined-out area based on ultrasonic distance measurement was introduced.
然后介绍了基于超声波测距的孔内空区形态探测系统的设计。
On the analysis of the principle of ultrasonic distance measurement based on, given the realization of ultrasonic reversing radar system hardware design circuit diagram and software design flow chart.
在分析超声波测距原理的基础上，给出了实现超声波倒车雷达系统的硬件设计电路图和软件设计流程图。
The invention discloses ultrasonic based dynamic distance measurement method and system, belonging to the technical field of distance measurement.
本发明公开一种基于超声波的动态距离测量方法及系统，属距离测量技术领域。
Experiment indicates that the measuring precision of ultrasonic distance measurement system is higher and its circuit is simpler.
实验表明，该测距系统测量精度高，电路简单。
The probe signals are integrated analysis by SCM to achieve the various functions of ultrasonic distance measurement instrument.
各探头的信号经单片机综合分析处理，实现超声波测距仪的各种功能。
A high accuracy ultrasonic distance measurement system is presented. based on the combination of both hardware and software controlling on the basis of the traditional ultrasonic ranging.
在传统超声波测距基础上，结合硬件和软件两方面的控制，提出一种高精度超声波测距系统。
This paper primarily investigates a kind of ultrasonic distance measurement device based on microprocessor.
本文主要研究开发了一种基于单片机微处理器的超声波测距系统。
A method of automatic reduction of blind distance in ultrasonic measurement is introduced.
文章介绍了一种自动抑制超声测量盲区的方法。
The invention discloses a system for guaranteeing the safe opening of a vehicle door, which is based on the principle of ultrasonic distance measurement.
本发明公开了一种确保汽车车门安全开启的系统，它基于超声波测距原理。
In this paper, the method that distance-measurement with ultrasonic is applied to height-measurement of coupler and range finder is presented.
介绍了超声波测距在车钩高度测量中的实现方法，研制出了测距仪。
In this paper, the principle of ultrasonic distance measurement is described, the main error sources of ultrasonic distance measurement are analyzed also.
介绍了超声波测距的原理。分析了超声波测距产生误差的主要原因。
In this paper, the principle of ultrasonic distance measurement is described, the main error sources of ultrasonic distance measurement are analyzed also.
介绍了超声波测距的原理。分析了超声波测距产生误差的主要原因。
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