lock n. 1.锁,闩,栓。 2.(运河等的)船闸。 3.制轮楔。 4.【机械工程】气闸,气塞,锁气室。 5.【军事】枪机。 6.锁住,固定。 7.〔俚语〕拘留所。 8.〔英国〕性病医院 (=lock hospital). 9.【自动化】同步。 10.结合,固着。 11.(摔跤的)揪扭。 12.煞车。 off the lock未锁。 on the lock锁着。 trick lock(对字的)密码锁。 lock the stable door after the horse has been stolen 贼走关门。 be at [on, upon] the lock 〔方言〕在窘困中。 lock, stock and barrel 全部;完全。 under lock and key 锁着,妥为保藏。 vt. 1. 锁,锁上。 2.收藏起来,秘藏。 3.抱紧,挽住;揪扭。 4.(使资本等)固定。 5.使固定。 6.用水闸止住;使通过水闸 (up down). 7.卡住,塞住。 8.将曲面印版装在轮转印刷机滚筒上。 lock a secret in one's heart 严守秘密。 be locked in a fight 打得难分难解。 be locked in contemplation 陷入沉思。 The ship was locked fast in ice. 这条船被冰封住。 The gears are locked. 齿轮卡住了。 vi. 1.锁住。 2.紧闭,不动。 3.抱住,揪扭,嵌进。 4.(船)通过水闸;造水闸。 lock away 锁起来。 lock down 让船开出水闸。 lock horns 争论 (over)。 lock in 关起来;锁在里面。 lock in synchronism 进入同步。 lock on 用雷达波束自动跟踪(目标)。 lock oneself in 把自己关在里面,闭门谢客。 lock out 1. 关在外面。 2. (资本家)封闭工厂。 lock up 1. 上锁,锁住。 2. 监禁。 3. 收藏(文件等)。 4. 固定(资本)。 adj. -less 无锁的;无船闸的。 lock2 n. 1.一绺卷发。 〔pl.〕头发。 2.(干草、羊毛等的)小量,一把,一撮。
Digital lock - in amplifier based on dsp and sampling adc 的数字锁定放大器
Lock - in amplifiers 锁定放大器
A computer controls the whole process of measurements by communicating with the lock - in amplifier via rs232 interface 计算机通过rs232接口与锁相放大器通信,控制测量的全过程。
A lock - in amplifier is used to supply the driving signal and to detect the output signal corresponding to the sample ' s strain 使用锁相放大器提供驱动信号,并同时检测对应于样品形变的输出信号。
Photoelectric detecting circuit is constituted of four parts , i / v conversion , lock - in amplifier , low - pass filter and operation 光电检测电路由四部分组成,分别是i / v转换环节、锁相放大环节、低通滤波环节、运算环节。
The core of the lock - in amplifier used to measure response of laps consists of a high precision modulator / demodulator and dds as signal generator 对于光寻址电位传感器,我们设计了以高精度调制解调器件和数字频率合成器件为核心的模拟锁相放大器。
For the signals are very weak , the lock - in amplifier is employed to extract the signals in the circuit design . it can inhabit the noise in the most and maximize the signal - to - noise 因为信号十分微弱,所以在电路设计上采用锁相放大器来提取信号,最大限度的抑制噪声,提高系统的信噪比。
Using the home made device , the relationship between the 3 voltage and the heating frequency is obtained by lock - in amplifier , thus the thermal conductivity of the fluid is calculated with the least square fit method 自行研制了流体导热系数的测量装置,采用锁相放大器获取3电压与频率的关系,并借助最小二乘法,算出待测试样的导热系数。
The experiment results show that : the frequency stabilization of the optimized doppler modulator has already reached rms error about 1 % , which could meet the need of reference signal of the lock - in amplifier 实验结果表明,经过优化后的多普勒调制器的输出调制信号频率的相对标准误差达到了1 %左右,能够满足锁相放大器对输入参考信号频率稳定度的要求。
Choosing y type reflection fiber optic detector , this thesis create a tiny displacement - detecting sensor that is made up of led ( light emitting diode ) , fiber optic detector , electric eye , lock - in amplifier , display and other electro circuits 本论文采用y型反射式光纤探头设计制作了一种微位移测量装置,它主要由发光二极管、光纤探头、 、锁相放大器、显示器及相关电路组成。