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 ◆遥测*,井下遥测*

遥测*,井下遥测*专题技术光盘》

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详细光盘目录如下:
[14-BG82507]  通过超宽带导频信号来同步无线遥测*的方法和设备-CN1645776 -

[英文标题]
Method and apparatus for synchronizing a radio telemetry system by way of transmitted-reference , delay-hopped ultra-wideband pilot signal
[中文摘要]
时分复用无线通信*和方法中使用发送参考、延迟跳跃(TR/DH)超宽带(UWB)广播信号,向覆盖范围内的所有移动设备*导频信号(5),从中*以获得时间同步。*移动设备中使用此TR/DH UWB脉冲导频信号以及低复杂度的解调方法,移动设备利用简单的信号检测算法去获得与该导频信号的同步。结果是,局域网内的所有设备*变成与此*的比特时钟相同步(87)。这会大大降低信号捕获所要求的搜索空间、接收机信号处理的复杂度、以及实现基站接收机与来自任意移动设备的传输之间的同步所要求的消息前同步的长度。
[英文摘要]
A time-division-multiplexed radio communication system and method uses transmitted-reference, delay-hopped (TR/DH) ultra-wideband (UWB) broadcast signal to provide a pilot signal to all mobile devices in a coverage area from which time synchronization is derived. Using this TR/DH UWB pulse pilot signal and low-complexity demodulation in the mobile devices, the mobile devices utilize a * signal detection algorithm to acquire synchronization with the pilot signal. As a result, all devices in a local area network become synchronized to the system's bit clock. This greatly reduces the search space required for signal acquisition, receiver signal processing complexity, and length of message preambles required to synchronize the base station receiver to a transmission from any of the mobile devices.

[15-BG82507]  采用高基数相移键控的低频电磁遥测*-CN1666115 -

[英文标题]
Low frequency electromagnetic telemetry system employing high cardinality phase shift keying
[中文摘要]
本文介绍了一种*速率得到*的电磁遥测*。*一个实施例中,使用了一个PSK*传输*来传输井下电磁遥测*的*,其中井下电磁遥测**边钻井边测量(MWD)的应用。MWD应用现**来*受到*速率的束缚,因为其难以适应*断增加的需传输的*量。**速率的一种方法是增加载波频率,但这*会导致令人*快的信号衰减和失真。相反,降低载波频率虽然有信号较强的好处,但*会带来信号混叠的风险,*是对宽带宽的信号而言。本文则公开了,实际上*以*增加相位状态数的同时降低频率,以获得较高的*速率,而**会影响带宽。所公开的*和方法**好地*一个强大、低功率而且*速率得到*的电磁遥测*。
[英文摘要]
A downhole electromagnetic telemetry system with an increased data rate is disclosed. In one embodiment, a PSK data transmission system is used to transmit data in a downhole electromagnetic telemetry system for Measure While Drilling (MWD) applications. MWD applications suffer from data rates that are not well suited for the ever-increasing amount of data that needs to be transmitted. One method of increasing the data rate includes increasing the carrier frequency, but this can cause undesirable signal attenuation and distortion. Conversely, decreasing the carrier frequency provides the reward of a stronger signal at the risk of aliasing, especially with wide bandwidth signals. A derivation is disclosed predicting that the frequency may actually be decreased while increasing the number of phase states to achieve a higher data rate, without affecting the bandwidth. The system and method disclosed may advantageously provide a robust, low-power electromagnetic telemetry system with an increased data rate.

[16-BG82507]  线载电流无线遥测*-CN1558244 -

[英文标题]
Wireless telemetering system for wire loaded current
[中文摘要]
本发明公开了*线线载电流无线遥测*。技术方案为:该*包括有无线遥测仪、地面遥控器、地面接收仪;无线遥测仪由无线遥测仪本体和无线遥测仪电路部分和电源部分组成等。优点是:*带电安装及拆卸电流测量仪器,而且*以用无线方式测量高压电流,这样既方便*安*,*是其安*性,是目前有线*所无法比拟的,*以广泛地应用*电力*的负载监测,防窃电,电力调度,继电保护,电力计量及线损分析等*中。
[英文摘要]
The present invention discloses radio remote on-line wire current measuring system. The technological scheme is the system includes radio remote metering instrument, ground remote controller, and ground receiver. The radio remote metering instrument consists of main body, circuit part, power supply and other parts. The current measuring instrument has the advantages of capacity of live installation and detaching, radio mode measurement of high voltage current, and being safe and convenient. The present invention may be used widely the load monitoring, power dispatching, relay protection, power metering, etc. of electric power system.

[17-BG82507]  对植入的**的低频经皮遥测*-CN1713234 -

[英文标题]
Low frequency transcutaneous telemetry to implanted medical device
[中文摘要]
一种*植入**有利地利用低频(例如,100kHz或以下)与外部控制模块*遥测通信,避免了由于植入*的金属壳体的涡电流及人体组织而产生的功率消耗,由此*使用诸如钛这样的金属壳体的*小型植入*和/或**强的遥测信号,从而**深的植入。
[英文摘要]
An implantable medical device advantageously utilizes low frequency (e.g., 100 kHz or below) for telemetry communication with an external control module avoiding power dissipation through eddy currents in a metallic case of an implant and/or in human tissue, thereby enabling smaller implants using a metallic case such as titanium and/or allow telemetry signals of greater strength for implantation to a greater depth.

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