Development of a Novel Micro-Gripper Integrating Tri-Axial Force Sensor

2007 ◽  
Author(s):  
Jiachou Wang ◽  
Weibin Rong ◽  
Lining Sun ◽  
Hui Xie ◽  
Wei Chen
Keyword(s):  
Axial Force ◽  
Crystalline Silicon ◽  
Force Sensor ◽  
Calibration Method ◽  
Deep Reactive Ion Etching ◽  
Micro Gripper ◽  
The Cross ◽  
Silicon Frame ◽  
High Level ◽  
Cross Structure

A novel micro gripper integrating tri-axial force sensor and two grades displacement amplifier is presented in this paper, which bases on the technology of Piezoresistive detection and use PZT as its micro driving component. The micro tri-axial force sensor is fabricated on a single-crystalline-silicon by the technology of MEMS and consists of a flexible cross-structure realized by deep reactive ion etching (DRIE). The arms of the cross-structure are connected to a silicon frame and to the central part of the cross-structure. After modeling the amplifier structure of micro gripper and the sensor, finite element method (FEM) is used to analyze the displacement of the micro gripper and the deformation of the cross-structure elastic cantilever. A calibration method of tri-axial sensor based on the technology of microscopic vision and the principle of bending deflection cantilever is proposed. The experimental verified that the sensor are high level of intrinsic decoupling of the signals from strain gauge, high resolutions in all three axes, high linearity and repeatability and simple produce of calculation. And also show the micro gripper is reasonable and practical. The sensor is capable of resolving forces up to 10mN with resolution of 2.4μN in x axis and y axis and up to 10mN with resolution of 4.2μN in z axis; the gripping displacement of the micro gripper is from 20μm to 300μm.

Research on PVDF Micro-Force Sensor

2014 ◽  
Vol 599-601 ◽  
pp. 1135-1138
Author(s):  
Chao Zhe Ma ◽  
Jin Song Du ◽  
Yi Yang Liu
Keyword(s):  
Power Dissipation ◽  
Polyvinylidene Fluoride ◽  
High Sensitivity ◽  
Force Sensor ◽  
Calibration Method ◽  
Pvdf Film ◽  
Force Sensors ◽  
Low Power Dissipation ◽  
Micro Force Sensor ◽  
Processing Circuit

At present, sub-micro-Newton (sub-μN) micro-force in micro-assembly and micro-manipulation is not able to be measured reliably. The piezoelectric micro-force sensors offer a lot of advantages for MEMS applications such as low power dissipation, high sensitivity, and easily integrated with piezoelectric micro-actuators. In spite of many advantages above, the research efforts are relatively limited compared to piezoresistive micro-force sensors. In this paper, Sensitive component is polyvinylidene fluoride (PVDF) and the research object is micro-force sensor based on PVDF film. Moreover, the model of micro-force and sensor’s output voltage is built up, signal processing circuit is designed, and a novel calibration method of micro-force sensor is designed to reliably measure force in the range of sub-μN. The experimental results show the PVDF sensor is designed in this paper with sub-μN resolution.

A note on the comparative reproductive performance of Friesland × North Country Cheviot and North Country Cheviot ewes on two levels of pasture prior to mating

1986 ◽  
Vol 42 (2) ◽  
pp. 287-289 ◽  
Author(s):  
R. G. Gunn
Keyword(s):  
Reproductive Performance ◽  
The Cross ◽  
High Level ◽  
Female Sheep ◽  
Improved Pasture

The Friesland or East Friesian breed of sheep is a heavy-milking type with a high level of prolificacy. The progeny of the cross with the Scottish Blackface female sheep (ewe) have been shown to have larger, heavier litters in a good lowland environment compared with crossbreds derived from other crossing sires (Boaz, Jones and Smith, 1980; British Friesland Sheep Society, 1983) and to have a higher twinning rate than Scottish Blackface ewes when mated on improved pasture on a hill farm (Doney, Peart, Smith and Sim, 1983). Information is required on the performance of crossbred ewes derived from Friesland sires on other hill breeds and run in less favourable environments such as are common in the hills and uplands.

COMBINATION ABILITY OF SELECTIVE CARP GROUPS DURING TWO-LINE BREEDING

2021 ◽  
pp. 66-77
Author(s):  
G.I. PRONINA ◽  
◽  
A.G. MANNAPOV
Keyword(s):  
Lipid Metabolism ◽  
First Generation ◽  
Immune Defense ◽  
Planting Density ◽  
Cationic Protein ◽  
Relative Growth ◽  
Physiological Properties ◽  
Line Breeding ◽  
The Cross ◽  
High Level

This paper presents the results of studying the productive and physiological properties of carp crosses – interline or interbreed hybrids of the first generation. The resulting crosses have a high potential for growth, metabolism, and non-specific cellular immunity. It was found that the studied cross-breeding combinations produced a heterotic effect, which was manifested in different ways depending on the climate zone, planting density, and feeding. In the “Ergeninsky” cross, obtained from crossing the local scaly and Moldavian mirror lines, the true heterosis in relative growth rate amounted to 85–89%. As compared with the parent forms, it has a higher immune defense against pathogens, judging by the large proportion of Mature segmentonuclear neutrophils. The “Mirror” cross is the result of crossing males of the Moldavian mirror line and females of the Volga frame carp that has a scattered scale cover –100%, body weight significantly exceeds the Moldavian mirror parent form. The cross has a smaller proportion of monocytes and neutrophils in the leukogram, and the content of lysosomal cationic protein in the latter is lower, which suggests that these phagocytes are consumed in the process of immune defense. As compared with the parent forms, the cross has more intensive protein metabolism, which can be proved by the high content of total protein and albumins, ALT activity. The lipid metabolism can be determined by the content of cholesterol. The activity of creatine kinase in the “Volzhsky” cross is 2–3 times lower as compared to the initial groups. The “Volga” cross is a reciprocal interbreed hybrid of the Southern zonal type of the Chuvash scaly carp and the Volga frame carp that has a high level of lipid metabolism.

Design and characterization of a silicon piezoresistive three-axial force sensor for micro-flapping wing MAV applications

2015 ◽  
Author(s):  
Wei Zhang ◽  
Van T. Truong ◽  
Kim B. Lua ◽  
A. S. Kumar ◽  
Tee Tai Lim ◽  
...  
Keyword(s):  
Axial Force ◽  
Force Sensor ◽  
Flapping Wing

Force Controlled Manipulation of Biological Cells Using a Monolithic MEMS Based Nano-Micro Gripper

2012 ◽  
Author(s):  
Ali A. Abbasi ◽  
M. T. Ahmadian
Keyword(s):  
Liquid Medium ◽  
Force Control ◽  
Force Sensor ◽  
Rapid Response ◽  
Pid Controllers ◽  
Biological Cells ◽  
Matlab Software ◽  
Micro Gripper ◽  
The Future ◽  
Geometrical Dimensions

Nano-micro grippers are able to pick-transport-place the micro or nanometer–sized materials, such as manipulation of biological cells or DNA molecules in a liquid medium. This paper proposes a novel monolithic nano-micro gripper structure with two axis piezoresistive force sensor which its resolution is under nanoNewton. The results of the study have been obtained by the simulation of the proposed gripper structure in Matlab software. Motion of the gripper arm is produced by a voice coil actuator. The behavior of the cell has been derived using the assumptions in the literatures. Moreover, two simple PID controllers, one for control of the gripper motion and another for control of the force during manipulation of a biologic cell, have been implemented. Although the proposed gripper has not been fabricated, since the geometrical dimensions of the proposed gripper is the same as previously developed electrothermally actuated micro-nano gripper, the results of force control have been also compared with it. The simulated results with the very simple PID force controller which has a more rapid response than previously developed electrothermally actuated micro-nano gripper show that the designed gripper has the potential to be considered and fabricated for manipulation of biological cells in the future.

A Novel Bi-Stable Force Sensor: Theory and Modeling

2009 ◽  
Author(s):  
Pezhman A. Hassanpour ◽  
Patricia M. Nieva ◽  
Amir Khajepour
Keyword(s):  
Analytical Model ◽  
Axial Force ◽  
Applied Voltage ◽  
Electrostatic Force ◽  
Force Sensor ◽  
Time Response ◽  
Constant Rate ◽  
New Type ◽  
Linear And Nonlinear ◽  
Theory And Modeling

In this paper, a novel sensing mechanism is introduced. This mechanism consists of a clamped-clamped beam and two parallel electrodes. An analytical model of the system, that takes into account the mechanical linear and nonlinear stiffnesses as well as the nonlinear electrostatic force, is developed. The time response of the system to a disturbance is derived while the applied voltage is increasing at a constant rate. It has been shown that the voltage, that destabilize the beam, can be used as a measure of the axial force in the beam. This technique can be used in the development of new type of sensors.

DEVELOPMENT AND CHARACTERIZATION OF A SILICON-BASED THREE AXIAL FORCE SENSOR

2005 ◽  
Author(s):  
F. VALVO ◽  
P. VALDASTRI ◽  
S. ROCCELLA ◽  
L. BECCAI ◽  
A. MENCIASSI ◽  
...  
Keyword(s):  
Axial Force ◽  
Force Sensor ◽  
Silicon Based
Sign in / Sign up

Export Citation Format

Share Document