蠕變應力松弛測試系統(tǒng)

蠕變應力松弛測試系統(tǒng)

組織材料蠕變試驗機微觀力學動靜態(tài)蠕變波形加載測試儀該多軸多功能微觀力學動態(tài)靜態(tài)蠕變波形加載測試分系統(tǒng)集成壓縮,拉伸,剪切,扭轉 ,壓痕摩擦,彎曲,穿刺,撕裂等各種高分辨率精準測試分析功能,適用軟硬單絲生物組織材料測試

該多軸多功能微觀力學動態(tài)靜態(tài)蠕變波形加載測試分系統(tǒng)集成壓縮,拉伸,剪切,扭轉 ,壓痕摩擦,彎曲,穿刺,撕裂等各種高分辨率精準測試分析功能,適用軟硬單絲生物組織材料測試。

How does the creep function works?

The Creep function moves a stage until a predefined load variation (Load Target (relative to initial load)) is reached and maintains this loading through real-time closed-loop PID adjustment of the stage position. This function can be used, for example, to study the deformation of a sample under constant loading. Note that tuning a PID requires a reasonable amount of closed-loop system understanding. A set of PID parameters optimized for a particular experimental configuration will probably be inappropriate for a different configuration and could even create system instabilities (oscillations) that can result in damage to the system.

Parameters:

STAGE AXIS - On multi-axis systems, the user must specify which axis will perform the “Creep”.

DIRECTION - Specify if the stage has to start moving in the positive or negative direction. With a positive displacement, a vertical stage will move down (compression), a horizontal stage will move right, and a rotation stage will move clockwise. Enter a negative value for stage displacements in opposite directions.

STAGE VELOCITY, MM/S - Specify the speed at which the stage will move. Refer to the specifications of your Mach-1? model to learn about the velocity range allowed. In Mach-1 Motion, the speed is always specified in absolute value terms.

RELATIVE LOAD TARGET, GF OR N - Specify the relative amount of load to be applied and maintained on the sample. When a value is entered, the stage will initiate its movement until a change in load of that magnitude is reached. The value for Relative Load Target is specified in absolute value terms. 

CREEP TIME, SEC - This is the time period during which the relative loading will be maintained. Note that after this period, the final stage position will be maintained.

P GAIN - This is the Proportional gain of the PID control loop. This is the main parameter that drives the feedback loop. Our experiments revealed that a good starting point for the optimization of this parameter is given by P = 0.001 (and I = 0), then raising P in logarithmic increments (0.01, 0.1, 1) until a satisfactory amplitude in reached. The higher the P value, the faster the error will be corrected, however if the P is made too large, the error can go negative (actual load>desired load) which may start a process where the stage starts to oscillate between speeding up and slowing down. This oscillation can result in the motor control system going unstable. A simple way to eliminate this instability would be to decrease P until the oscillation stops.

I GAIN - This is the Integral gain of the PID control loop. Integral control sums the error from each position update then multiplies the sum by the Integral gain, I. Our experiments revealed that for most creep tests, best results are achieved with I = 0. If a residual error exists while holding a load, the I value can also be incrementally increased until the error disappears.

多功能組織材料生物力學特性、電位分布測試分析表征系統(tǒng)

型號:mach-1
品牌:biomomentum

更多介紹

多功能組織材料生物力學特性、電位分布測試分析表征系統(tǒng)

該系統(tǒng)是能集成壓縮、張力、剪切、摩擦、扭轉和2D/3D壓痕、3D輪廓及多力混合耦連測試的一體化微觀力學測試裝置。能對生物組織、聚合物、凝膠、生物材料、膠囊、粘合劑和食品進行精密可靠的機械刺激和表征。允許表征的機械性能包括剛度、強度、模量、粘彈性、塑性、硬度、附著力、腫脹和松弛位移控制運動。

特點

1、適用樣品范圍廣：

1.1、從骨等硬組織材料到腦組織、眼角膜等軟組織材料

1.2、從粗椎間盤的樣品到極細纖維絲

2、通高量壓痕測試分析

2.1、三維法向壓痕映射非平面樣品整個表面的力學特性

2.2、48孔板中壓痕測試分析

3、力學類型測試分析功能齊全

模塊化集成壓縮、張力、剪切、摩擦、扭轉、穿刺、摩擦和2D/3D壓痕、3D表面輪廓、3D厚度等各種力學類型支持,微觀結構表征及動態(tài)力學分析研究

4、高分辨率:

4.1、位移分辨率達0.1um

4.2、力分辨率 達0.025mN

5、 行程范圍廣：50-250mm

6、體積小巧、可放入培養(yǎng)箱內

7 、高變分辨率成像跟蹤分析

8、多軸向、多力偶聯(lián)刺激

9、活性組織電位分布測試分析

10、產(chǎn)品成熟，文獻量達 上千篇

該微觀力學測試分析與培養(yǎng)系統(tǒng)初該系統(tǒng)為軟骨力學性能檢測所研發(fā)，此后集成了多種配置以滿足更多生物組織和軟質材料力學性能的測量和評估。該儀器性能特點--模塊化設計，簡易操作平臺，面向用戶設計，廣泛應用于生物材料檢測，高分子材料檢測以及數(shù)字教學等領域，產(chǎn)品得到了業(yè)界廣泛的認可和推廣。該系統(tǒng)

相比于傳統(tǒng)的大型力學測試系統(tǒng)，該微觀力學測試系統(tǒng)總體較小，可以實現(xiàn)桌面化的操作流程，操作過程簡便。該系統(tǒng)測試方法全面，是多樣化的材料力學表征工具，是科學家、工程師和其他各領域用戶的選擇。在動態(tài)力學分析、薄膜、復合物、聚合物、生物產(chǎn)品、醫(yī)學鑒定和水凝膠等領域都有廣泛應用。