公开(公告)号：US5402230A

公开(公告)日：1995-03-28

申请号：US989640

申请日：1992-12-11

申请人： Qian Tian ,  Enyao Zhang ,  Donglei Tang ,  Akira Shimokohbe ,  Masahiro Akahane ,  Kenji Sakai

发明人： Qian Tian ,  Enyao Zhang ,  Donglei Tang ,  Akira Shimokohbe ,  Masahiro Akahane ,  Kenji Sakai

IPC分类号： G01B9/02 ,  G01D5/26

CPC分类号： G01D5/268 ,  G01B9/02002 ,  G01B9/02045 ,  G01B9/02067 ,  G01S17/325 ,  G01S7/4818 ,  G01S7/4911 ,  G01S7/4917

摘要： A heterodyne interferometric optical fiber displacement sensor using a laser diode. The frequency and the intensity of the laser diode beam are periodically modulated by an injection current. The laser diode beam is routed to a rod lens via a first optical fiber, an optical fiber coupler, and a second optical fiber. The interference light resulting from the interference between the light reflected from the exit surface of the rod lens and the light reflected from an object surface is routed to a third optical fiber via the optical fiber coupler, which is then detected by a photodiode attached to the end of the third optical fiber. From the output of the photodiode, a given frequency component is extracted using a bandpass-filter. The extracted signal is converted into a pulse signal. The frequency change of the pulse signal (equivalent to a doppler frequency shift caused by the movement of the object surface) is accumulated using an electronic circuit. Then, the accumulated value is used to calculate the displacement of the object surface.

摘要翻译： 使用激光二极管的外差干涉光纤位移传感器。 激光二极管光束的频率和强度由注入电流周期性地调制。 激光二极管光束通过第一光纤，光纤耦合器和第二光纤被路由到棒状透镜。 由从棒状透镜的出射面反射的光与从物体表面反射的光之间的干涉产生的干涉光通过光纤耦合器被路由到第三光纤，然后光纤耦合器被附接到 第三根光纤的端部。 从光电二极管的输出，使用带通滤波器提取给定的频率分量。 提取的信号被转换成脉冲信号。 使用电子电路累积脉冲信号的频率变化（相当于由物体表面的移动引起的多普勒频移）。 然后，累加值用于计算物体表面的位移。

公开(公告)号：US09470672B2

公开(公告)日：2016-10-18

申请号：US14131816

申请日：2011-12-30

申请人： Jiaping Liu ,  Qian Tian ,  Ting Yao ,  Yujiang Wang ,  Yujiang Wang ,  Hang Zhang ,  Jianye Zhang

发明人： Jiaping Liu ,  Qian Tian ,  Ting Yao ,  Yujiang Wang ,  Yujiang Wang ,  Hang Zhang ,  Jianye Zhang

IPC分类号： G01N5/02 ,  G01N33/38

CPC分类号： G01N33/383

摘要： Disclosed is a method for testing the self-drying effect of a cement-based material, capable of testing the change in humidity of the cement-based material after the final setting until the Id stage of adding water, so as to reflect the water consumption therein and the self-drying course. In the time period after the final setting of the cement-based material until the 1 d stage of adding water and forming, the dew-point temperature inside the cement-based material is tested, and then the relative humidity inside the cement-based material is calculated using a formula. The present invention can test the change in humidity of the cement-based material after the final setting until the Id stage of adding water, so as to reflect the internal water consumption therein and the self-drying course. Further provided is a multi-stage test method for the whole course, capable of testing the whole course of continuous reduction in relative humidity from an initial 100%, in sealed conditions, starting with adding water and formation of the cement-based material, so as to provide a theoretical foundation for the quantitative calculation of the self-drying and shrinking thereof.

摘要翻译： 公开了一种用于测试水泥基材料的自干效果的方法，其能够在最终凝固之后测试水泥基材料的湿度变化，直到添加水的Id阶段，以便反映水的消耗量 在那里和自干课程。 在水泥基材料最终凝固至添加水和成型1天阶段的时间段内，测试水泥基材料内的露点温度，然后测试水泥基材料内的相对湿度 使用公式计算。 本发明可以测试最终凝固后的水泥基材料的湿度变化，直到添加水的Id阶段，以反映其内部的水分消耗和自干燥过程。 进一步提供了一个全程的多级测试方法，能够在密封条件下从最初的100％连续降低相对湿度的全过程，从添加水和形成水泥基材料开始， 为自身干燥和收缩的定量计算提供了理论依据。

公开(公告)号：US09389216B2

公开(公告)日：2016-07-12

申请号：US14131748

申请日：2011-12-30

申请人： Qian Tian ,  Jiaping Liu ,  Hang Zhang ,  Yujiang Wang ,  Fei Guo ,  Jianye Zhang

发明人： Qian Tian ,  Jiaping Liu ,  Hang Zhang ,  Yujiang Wang ,  Fei Guo ,  Jianye Zhang

IPC分类号： G01N33/38 ,  G01N11/00 ,  G01N13/02

CPC分类号： G01N33/383 ,  G01N11/00 ,  G01N2013/0208 ,  G01N2203/0092

摘要： Disclosed is a method for testing the setting time of a cement-based material: testing the capillary negative pressure of a non-bleeding cement-based material, with the time at which the capillary negative pressure reaches a threshold value A as the initial setting time, and/or the time at which the capillary negative pressure reaches a threshold value B as the final setting time, wherein threshold value A is 8-10 kPa, and threshold value B is 54-56 kPa. Alternatively, threshold value A and threshold value B are determined by the following method: formulating a cement-based material for the determination of threshold values with the same raw materials at the same formulation ratio; after vibration-compaction, placing a portion into a measuring mold; after vibration-compaction, testing the capillary negative pressure of the non-bleeding cement-based material placed in the measuring mold; under the same conditions, synchronously testing and determining the initial setting time and final setting time of the cement-based material for the determination of threshold values by a penetration resistance method; the capillary negative pressure corresponding to the initial setting time and final setting time of the cement-based material for the determination of threshold values are respectively threshold value A and threshold value B. The method can not only be used in standard tests for a laboratory cement setting time under standard temperature conditions, but can also be used to realize remote, automatic, and continuous in situ monitoring for the setting time of a cast-in-situ concrete structure.

摘要翻译： 公开了一种用于测试水泥基材料的凝固时间的方法：测试非渗出水泥基材料的毛细管负压，其中毛细管负压达到阈值A的时间为初始凝固时间 ，和/或毛细管负压达到阈值B作为最终凝固时间的时间，其中阈值A为8-10kPa，阈值B为54-56kPa。 或者，通过以下方法确定阈值A和阈值B：配制用于以相同配制比的相同原料测定阈值的水泥基材料; 在振动压实之后，将一部分放置在测量模具中; 振动压实后，测试放置在测量模具中的不渗出水泥基材料的毛细管负压; 在相同条件下，通过渗透阻力法同步测试和确定水泥基材料的初始凝固时间和最终凝固时间，以确定阈值; 用于确定阈值的水泥基材料的初始凝固时间和最终凝固时间的毛细管负压分别为阈值A和阈值B.该方法不仅可用于实验室水泥的标准试验 在标准温度条件下凝固时间，也可用于对现浇混凝土结构的凝固时间进行远程，自动和连续的现场监测。

公开(公告)号：US08933745B2

公开(公告)日：2015-01-13

申请号：US13980355

申请日：2012-05-29

申请人： Jianhui Wu ,  Xiao Shi ,  Chao Chen ,  Zhilin Liu ,  Qiang Zhao ,  Junfeng Wen ,  Xudong Wang ,  Chunfeng Bai ,  Qian Tian

发明人： Jianhui Wu ,  Xiao Shi ,  Chao Chen ,  Zhilin Liu ,  Qiang Zhao ,  Junfeng Wen ,  Xudong Wang ,  Chunfeng Bai ,  Qian Tian

IPC分类号： G06G7/12 ,  H03H11/04 ,  H03D7/14

CPC分类号： H03H11/0466 ,  H03D7/1441 ,  H03D7/1466

摘要： A transconductance-enhancing passive frequency mixer comprises a transconductance amplification stage, a frequency mixing stage, and an output transresistance amplifier. The transconductance amplification stage has a pre-amplification transconductance-enhancing structure, so that the transconductance is greatly enhanced, thereby obtaining the same transconductance value at a lower bias current. A radio-frequency current is modulated by the frequency mixing stage to generate an output mid-frequency current signal. The mid-frequency current signal passes through the transresistance amplifier, to form voltage output, and finally obtain a mid-frequency voltage signal. The transresistance amplifier has a transconductance-enhancing structure, thereby further reducing input impedance, and improving current utilization efficiency and port isolation. The frequency mixer has the characteristics of low power consumption, high conversion gain, good port isolation, and the like.

摘要翻译： 跨导增强型无源混频器包括跨导放大级，频率混频级和输出跨阻放大器。 跨导放大级具有预放大跨导增强结构，使得跨导大大增强，从而在较低偏置电流下获得相同的跨导值。 射频电流由混频级调制以产生输出中频电流信号。 中频电流信号通过跨阻放大器，形成电压输出，最后得到中频电压信号。 跨阻放大器具有跨导增强结构，从而进一步降低输入阻抗，提高电流利用效率和端口隔离。 该混频器具有低功耗，高转换增益，良好的端口隔离等特点。

公开(公告)号：US20140144217A1

公开(公告)日：2014-05-29

申请号：US14131816

申请日：2011-12-30

申请人： Jiaping Liu ,  Qian Tian ,  Ting Yao ,  Yujiang Wang ,  Yujiang Wang ,  Hang Zhang ,  Jianye Zhang

发明人： Jiaping Liu ,  Qian Tian ,  Ting Yao ,  Yujiang Wang ,  Yujiang Wang ,  Hang Zhang ,  Jianye Zhang

IPC分类号： G01N33/38

CPC分类号： G01N33/383

摘要： Disclosed is a method for testing the self-drying effect of a cement-based material, capable of testing the change in humidity of the cement-based material after the final setting until the Id stage of adding water, so as to reflect the water consumption therein and the self-drying course. In the time period after the final setting of the cement-based material until the 1 d stage of adding water and forming, the dew-point temperature inside the cement-based material is tested, and then the relative humidity inside the cement-based material is calculated using a formula. The present invention can test the change in humidity of the cement-based material after the final setting until the Id stage of adding water, so as to reflect the internal water consumption therein and the self-drying course. Further provided is a multi -stage test method for the whole course, capable of testing the whole course of continuous reduction in relative humidity from an initial 100%, in sealed conditions, starting with adding water and formation of the cement-based material, so as to provide a theoretical foundation for the quantitative calculation of the self-drying and shrinking thereof.

摘要翻译： 公开了一种用于测试水泥基材料的自干燥效果的方法，其能够在最终凝固之后测试水泥基材料的湿度变化，直到添加水的Id阶段，以便反映水的消耗 在那里和自干课程。 在水泥基材料最终凝固至添加水和成型1天阶段的时间段内，测试水泥基材料内的露点温度，然后测试水泥基材料内的相对湿度 使用公式计算。 本发明可以测试最终凝固后的水泥基材料的湿度变化，直到添加水的Id阶段，以反映其内部的水分消耗和自干燥过程。 进一步提供了一个整个过程的多级测试方法，能够在密封条件下从最初的100％测试相对湿度的连续降低的全过程，从添加水和形成水泥基材料开始，因此 为自身干燥和收缩的定量计算提供了理论依据。

公开(公告)号：US20140130620A1

公开(公告)日：2014-05-15

申请号：US14131748

申请日：2011-12-30

申请人： Qian Tian ,  Jiaping Liu ,  Hang Zhang ,  Yujiang Wang ,  Fei Guo ,  Jianye Zhang

发明人： Qian Tian ,  Jiaping Liu ,  Hang Zhang ,  Yujiang Wang ,  Fei Guo ,  Jianye Zhang

IPC分类号： G01N33/38

CPC分类号： G01N33/383 ,  G01N11/00 ,  G01N2013/0208 ,  G01N2203/0092

摘要： Disclosed is a method for testing the setting time of a cement-based material: testing the capillary negative pressure of a non-bleeding cement-based material, with the time at which the capillary negative pressure reaches a threshold value A as the initial setting time, and/or the time at which the capillary negative pressure reaches a threshold value B as the final setting time, wherein threshold value A is 8-10 kPa, and threshold value B is 54-56 kPa. Alternatively, threshold value A and threshold value B are determined by the following method: formulating a cement-based material for the determination of threshold values with the same raw materials at the same formulation ratio; after vibration-compaction, placing a portion into a measuring mold; after vibration-compaction, testing the capillary negative pressure of the non-bleeding cement-based material placed in the measuring mold; under the same conditions, synchronously testing and determining the initial setting time and final setting time of the cement-based material for the determination of threshold values by a penetration resistance method; the capillary negative pressure corresponding to the initial setting time and final setting time of the cement-based material for the determination of threshold values are respectively threshold value A and threshold value B. The method can not only be used in standard tests for a laboratory cement setting time under standard temperature conditions, but can also be used to realize remote, automatic, and continuous in situ monitoring for the setting time of a cast-in-situ concrete structure.

摘要翻译： 公开了一种用于测试水泥基材料的凝固时间的方法：测试非渗出水泥基材料的毛细管负压，其中毛细管负压达到阈值A的时间为初始凝固时间 ，和/或毛细管负压达到阈值B作为最终凝固时间的时间，其中阈值A为8-10kPa，阈值B为54-56kPa。 或者，通过以下方法确定阈值A和阈值B：配制用于以相同配制比的相同原料测定阈值的水泥基材料; 在振动压实之后，将一部分放置在测量模具中; 振动压实后，测试放置在测量模具中的不渗出水泥基材料的毛细管负压; 在相同条件下，通过渗透阻力法同步测试和确定水泥基材料的初始凝固时间和最终凝固时间，以确定阈值; 用于确定阈值的水泥基材料的初始凝固时间和最终凝固时间的毛细管负压分别为阈值A和阈值B.该方法不仅可用于实验室水泥的标准试验 在标准温度条件下凝固时间，也可用于对现浇混凝土结构的凝固时间进行远程，自动和连续的现场监测。

公开(公告)号：US20130285715A1

公开(公告)日：2013-10-31

申请号：US13980355

申请日：2012-05-29

申请人： Jianhui Wu ,  Xiao Shi ,  Chao Chen ,  Zhilin Liu ,  Qiang Zhao ,  Junfeng Wen ,  Xudong Wang ,  Chunfeng Bai ,  Qian Tian

发明人： Jianhui Wu ,  Xiao Shi ,  Chao Chen ,  Zhilin Liu ,  Qiang Zhao ,  Junfeng Wen ,  Xudong Wang ,  Chunfeng Bai ,  Qian Tian

IPC分类号： H03H11/04

CPC分类号： H03H11/0466 ,  H03D7/1441 ,  H03D7/1466

摘要： A transconductance-enhancing passive frequency mixer comprises a transconductance amplification stage, a frequency mixing stage, and an output transresistance amplifier. The transconductance amplification stage has a pre-amplification transconductance-enhancing structure, so that the transconductance is greatly enhanced, thereby obtaining the same transconductance value at a lower bias current. A radio-frequency current is modulated by the frequency mixing stage to generate an output mid-frequency current signal. The mid-frequency current signal passes through the transresistance amplifier, to form voltage output, and finally obtain a mid-frequency voltage signal. The transresistance amplifier has a transconductance-enhancing structure, thereby further reducing input impedance, and improving current utilization efficiency and port isolation. The frequency mixer has the characteristics of low power consumption, high conversion gain, good port isolation, and the like.

摘要翻译： 跨导增强型无源混频器包括跨导放大级，频率混频级和输出跨阻放大器。 跨导放大级具有预放大跨导增强结构，使得跨导大大增强，从而在较低偏置电流下获得相同的跨导值。 射频电流由混频级调制以产生输出中频电流信号。 中频电流信号通过跨阻放大器，形成电压输出，最后得到中频电压信号。 跨阻放大器具有跨导增强结构，从而进一步降低输入阻抗，提高电流利用效率和端口隔离。 该混频器具有低功耗，高转换增益，良好的端口隔离等特点。