| 1. | Constant volume flow standard
定容式气体微流量标准装置 |
| 2. | Development of gas micro - flow measurement virtual instrument based on labview
的气体微流量测量虚拟仪器的开发 |
| 3. | This is the theory using to measure the flux of low - velocity flow
这就为在微流量条件下采用电磁法进行测量建立了理论基础。 |
| 4. | Photron specializes in research , development and manufacture of high quality light sources used in analytical spectroscopy
例如capillary lc mdlc微流量液相色谱多维液相色谱。 |
| 5. | And the content of capillary ion chromatography instrument includes micro - flow pump , injector , suppressors , conductometric detectors , uv - vis detectors and fluorescence detectors with small volumes
对毛细管离子色谱仪的总结包括微流量泵、小体积进样器、适合毛细管离子色谱系统的小体积抑制器、电导和光学检测器等。 |
| 6. | Part one : research on the measurement of low - velocity flow with intelligence electromagnetic flowmeter . at first , the paper analyses the difficulty when measuring the low - velocity flow with common electromagnetic flowmeter
本文主要由两个部分组成：第一部分：微流量智能型电磁流量计的研究本部分就流量计发展的第一个方向设计出高性能、高精确度的智能型微流量电磁流量计。 |
| 7. | To resolve the difficulty of installing flow sensors in the conventional microinjection system , based on the development status of mems and micro flow control technology , the possibility of constructing a kind of transgenic microinjection system is analyzed and explored
为了解决常规系统中布置反映实际出流信息的传感器的困难，结合微电子机械系统和微流量控制系统的发展现状，就构建基于mems的转基因微注射控制系统进行了可行性分析与探索。 |
| 8. | Comparing to inducing - magnetic mode with 50hz alternating current , we can use lower frequency alternating current to induce the magnetic so that it can eliminate the noise at 50hz frequency and weaken the noise whose phase lags signal 90 ? greatly . comparing to inducing - magnetic mode using rectangle - wave current as the signal , using low frequency to induce magnetic can eliminate ( weaken ) the differential coefficient noise . thirdly , it eliminates or weakens all different noise by designing the circuitry effectively in the transforming signal part
相对于50hz交流励磁，这种励磁方法可以采用更低的频率来对微流量的磁路进行励磁，一方面可以完全消除工频干扰，另一方面可以极大地减小正交干扰；相对于方波励磁，这种励磁方法相当于多值方波励磁，有利于消除或减少方波法励磁所带来的微分干扰。 |
| 9. | The innovation in this paper is list below ( 1 ) use rectangle - shape pipeline so that the inducing electromotive force could be enhanced ; ( 2 ) use alternating current whose frequency is adjustable to induce the magnetic ; ( 3 ) make the flowmeter intelligent by use the microprocessor ; ( 4 ) finish designing the ls flowmeter with utra - low power consumption
本文的创新之处在于采用矩形测量导管大大增加微流量条件下的感应电动势；采用输出频率可调的正弦波电流作为励磁电流达到消除50hz频干扰和减少正交干扰的目的；利用单片机等高端现代电子产品实现了电磁流量计的高度智能化及设计出真正的超低功耗的、可用干电池长期供电的ls旋转流量计。 |
| 10. | Then we set up the model of rectangle - shape pipeline . we compare it to circuit - shape pipeline on sides of the value of induced electromotive force , pressure loss when liquid flow trough the pipeline and resistance ' s value of the sensor . we get the result that we can finish the measurement of low - velocity flow by using the rectangle - shape pipeline
接着对矩形测量导管进行建模，并在流体流经矩形测量导管时产生感应电动势的大小、流体在测量导管中的压力损失和传感器内阻的大小对输出信号的影响等几个方面与圆形测量导管进行比较后得出采用矩形测量导管完全能够有效地完成微流量的测量。 |
