应变片目录
传感器的定义：
电阻应变式称重测力传感器
传感器的定义：
能把被测物理量或化学量转变成为电量的一种器件或元件叫传感器（又称变换器）其中我们平时接触较多物理量就有温度、湿度、质量、重量、力、压强、速度、加速度、长度、角度、液位、流量、密度等，与此相以对应，生产和生活中就需要温度传感器、湿度传感器、称重测力传感器、压强传感器等等。
电阻应变式称重测力传感器
称重传感器的定义：
一种已考虑到使用当地的重力加速度和空气浮力影响的用来测量质量的传感器。称重传感器能把被测质量转换成电压信号。有各种各样的称重传感器，例电容式称重传感器；电磁平衡式传感器，有压电式称重传感器等等。
箔式电阻应变片
一种基于应变——电阻效应制成的，用金属箔作为敏感栅的，能把被测试件的应变量转换成电阻变化量的敏感元件称为箔式电阻应变片。
应变式称重传感器 采用电阻应变片作为敏感元件制造生产的称重传感器叫应变式称重传感器。
应变式测力传感器
采用电阻应变片作为敏感元件制造生产的能把各种力学量转换为电量的传感器叫测力传感器。例拉力、压力、压强、扭拒、加速度等传感器。
应变式称重测力传感器与测力传感器之间的关系
从理论上说，质量表征实体的一种性质，，其测量单位是千克，而力学量是一种向量，测量单位是牛顿及其它导出量，彼此毫无关系。但由于质量不能直接测量，质量是利用质量在地球重力场中的力效应（重量）来测量的，所以从测量技术而论它们彼此是同类的。
应变片的工作原理
将应变片贴在被测定物上，使其随着被测定对象的应变一起伸缩，这样应变片里面的金属箔材就随着应变伸长或缩短。很多金属在机械性地伸长或缩短时其电阻会随之变化。应变片就是应用这个原理，通过测量电阻的变化而对应变进行测定。一般应变片的敏感栅使用的是铜铬合金，其电阻变化率为常数，与应变成正比例关系。
即 ΔR/R= K×ε
在这里 R：应变片的原电阻值Ω
ΔR：伸长或压缩所引起的电阻变化Ω
K：比例常数(应变片常数)
ε：应变
不同的金属材料有不同的比例常数K。铜铬合金的K值约为2。这样，应变的测量就通过应变片转换为对电阻变化的测量。但是由于应变是相当微小的变化，所以产生的电阻变化也是极其微小的。例如我们来计算1000×10?6的应变产生的电阻的变化。应变片的电阻值一般来说是120 欧姆，即
ΔR/120=2×1000×10-6
ΔR=120×2×1000×10?6= 0.24Ω
电阻变化率为 ΔR/R=0.24/120=0.002→0.2%
要精确地测量这么微小的电阻变化是非常困难的，一般的电阻计无法达到要求。为了对这种微小电阻变化进行测量，我们使用带有韦斯通电桥回路的专用应变测量仪。应变片本身的追随能力可以达到数百kHz，通过组合的测定装置可以对冲击现象进行测量。行驶中的车辆，飞行中的飞机等各部位的变动应力可以通过应变片和测定装置进行初步的测量。
测量电路：惠斯通电桥
惠斯通电桥适用于检测电阻的微小变化，应变片的电阻变化也可以用这个电路来测量。如图5 所示，惠斯通电桥由四个电阻组合而成。
图5 图6
如果 R1 =R2 =R3 =R4 或 R1×R2 =R3×R4
则无论输入多大电压，输出电压e总为0，这种状态称为平衡状态。如果平衡被破坏，就会产生与电阻变化相对应的输出电压。如图6所示，将这个电路中的R1用应变片相连，有应变产生时，记应变片电阻的变化量为ΔR，则输出电压e的计算公式如下所示。
e=(1/4)*(ΔR/R)*E 即 e =(1/4)*K*ε*E
上式中除了ε 均为已知量，所以如果测出电桥的输出电压就可以计算出应变的大小。上例电路中只联入了一枚应变片，所以称为单一应变片法（1/4桥）。除此之外，还有双应变片半桥法及四应变片全桥法。
如图7 所示，在电桥中联入了四枚应变片（全桥）。四应变片法是桥路的四边全部联入应变片，在一般的应变测量中不经常使用，但常用于应变片式的变换器中。如图7 所示，当四条边上的应变片的电阻分别引起如R1+ΔR1，R2+ΔR2，R3+ΔR3，R4+ΔR4 的变化时
若四枚应变片完全相同，比例常数为K,且应变分别为ε1,ε2,ε3,ε4。则上面的式子可写成下面的形式。
也就是说，应变测量时，邻臂上的应变相减，对臂上的应变相加。
图7 图8
如图8所示，四边的电阻中只有R1用应变片相连时，所以输出电压可写成：
e=(1/ 4)*(ΔR1/R1)*E 即 e =(1/4)*K*ε*E
一般的应变测量大部分都使用单应变片法。
如图9所示，在电桥中联入了两枚应变片，共有两种联入方法，即半桥邻边法（a）和半桥对边法（b）。四条边中有两条边的电阻发生变化，根据上面的四应变片法的输出电压式可得，
联入方式如图9（a）所示时，
联入方式如图9（b）所示时， 也就是说当联入两枚应变片时，根据联入方式的不同，两枚应变片上产生的应变或相加或相减。
图9 半桥：(a)邻边和(b)对边
|
电阻应变计型号命名规则
Strain gage coding system |
|
B
B
350-3AA
80 (23)-H |
|
B：应变计类型
Gage Type |
B—箔式
B-foil gage |
|
|
B: 基底材料
Backing material |
B-玻璃纤维增强酚醛，A-聚酰压胺，AS-特殊聚酰压胺，F-改性酚醛树脂，H-玻璃纤维增强环氧树脂
B-Glass Fibre reinforced phenol,
A-Polyimide, AS-special polyimide, F-Modify
phenol, H- Glass Fibre reinforced epoxy
|
|
|
|
350: 应变计电阻
Resistance in OHMs |
|
|
|
3: 应变计栅长
Active gage length in mm |
|
|
|
AA: 敏感栅结构形状
Grid and Tab geometry |
|
|
|
80: 极限工作温度
Limit operation temperature |
|
|
|
(23): 温度自补偿
Temperature compensation |
11:合金钢，16，不锈钢，23，铝
11，Mild steel,16, Stainless steel, 23,
Aluminum |
|
|
H: 蠕变编号
Creep code |
|
|
|
注:蠕变编号命名规则
(11)(16)系列:10* 20* 30* 40* 50* 60* 70* 80* 90*
(23)系列:B C E F G H I J K L M N O P |
|
|
|
|
|
|
|
电阻应变计基底材料一般选用环氧树脂，酚醛树脂，聚酰亚胺，缩甲乙醛等有机粘结剂。
但作为高精度，高稳定性称重传感器用电阻应变计的基底材料选用的大多为有填料的有机材料如：玻璃纤维增强的环氧－酚醛树脂，玻璃纤维增强的酚醛树脂还有特殊的聚酰亚胺树脂等。
尽管无填料的一些有机材料如环氧，改性酚醛等因为其具有比较高的剪切模量，而且常温的流动性非常好，因此可以制作成非常薄的基底，该类应变计的蠕变性能很好，但是，与所有无填料的其它塑性树脂一样，随着温度的升高其蠕变会增加
．
为了同时满足高温状态下的应变计稳定性以及呈现最小的蠕变特性，往往采用对环氧树脂、酚醛树脂或者聚酰亚胺进行增强，即选用玻璃纤维作为填料，从而增加了树脂的弹性模量，也改变了应变计的柔软性。
应变计基底所起到的作用是作为一个载体将敏感箔材固定在其上面，从而方便应变计的安装，又不易被损坏，起到绝缘的效果，最重要的是其作为传递应变的介质，将弹性体的应变传递至敏感箔材。在一定温度以及应变范围内基底传递应变
是否精确以及重复性如何是首先要考虑的问题。实际上基底传递应变的能力
取决于其剪切的模量，由于温度升高将会减小基底材料的剪切模量，因此高
弹性模量基底在比较高的温度状态下往往呈现出比较好的性能，但是，高弹性模量的应变计一般比较脆，柔软性较差。但是特殊聚酰亚胺却既具有高的剪切模量又具有柔软性好的特点。
１．剪切模量：必须足够高以使试件的应变能够准确，快速的传递至敏感栅。
２．蠕变：它是随着时间的变化而呈现应变的变化，由于时间而使应变传递产生误差，同时，温度的变化也会产生蠕变的变化。蠕变的大小取决于基底材料以及敏感栅的几何结构。
３．柔软性：对于应变计粘帖在圆弧面上特别重要，柔软性好才会使应变计不至于由于弯曲而产生裂痕．
４．延伸率：粘贴在弹性体上的应变计在承受最大应变时而不至于产生裂痕的参数，但由于称重传感器一般承受的最大应变只有1000µm/m所以该参数不是最重要。
５．剥离强度：该参数是衡量金属箔材被从基底处剥离的强弱程度。它不是直接反应测量的精度，但对于应变计的安装以及焊接影响很大。
６．绝缘电阻：衡量敏感栅金属箔材与传感器弹性体之间的绝缘性能。
７．热膨胀系数：材料受热后会有一定的膨胀，该参数衡量基底材料受热后的膨胀程度，因为膨胀过大形成的虚应变值会对测量带来误差。
８．粘贴性：描述应变计通过粘结剂安装在传感器弹性体上是否能形成强的粘结力的能力。
|
|
环氧树脂 |
酚醛树脂 |
特殊聚酰亚胺 |
称重传感器需求 |
|
剪切模量 |
高 |
高 |
高 |
高 |
|
蠕变 |
低 |
低 |
低 |
低 |
|
柔软性 |
中 |
差 |
好 |
好 |
|
延伸率 |
低 |
低 |
低 |
中 |
|
剥离强度 |
中 |
中 |
高 |
中 |
|
绝缘电阻 |
高 |
高 |
高 |
高 |
|
粘贴性 |
好 |
中 |
好 |
中 |
There are many kinds of backing
materials, such as Epoxy resins, Phenol resins, and
polyimide resins and so on.The primary functions of backing
materials are:.proper support of the grid during
handling and installation .electrical insulation of the grid
to the load cell .complete and unaltered
transmission of the strain field from the load cell
surface to the sensing grid .Flexible, so that the S/G can
also be installed on cured surfaces without damage to
the grid The consideration of the backing
materials as following factors:.Peel Strength .Peel Strength is a measure of
bond strength between backing and metal foil as the foil
is removed from the backing, but it’s not a direct
measure for gauge performance or accuracy. However
sufficient peel strength is necessary to prevent any
areas of the grid from unbonding from the backing during
handling, installation or soldering..Insulation resistance .Insulation resistance is a
measure for the backing’s ability to insulate the grid
from the load cell element. It should be 1000 MΩor
higher..Bond ability .Describes the ability of the
backing film to form a strong bond with the adhesive
used for gauge installation..Thermal expansion coefficient .If it’s too high unbonding may
occur because of high shear stress. Unfilled backing is
in the range of 50-70 ppm/K. By using fibrous fillers it
can be reduced significantly and in addition flexibility
and handling strength will increase..shear modulus .Shear modulus is an index of the
stiffness of the backing. It must be high enough to
transmit the strain of the specimen into the sensing
grid..Creep .Creep is a time-dependent change
in dimension under sustained stress. It causes a loss of
strain transmission through the backing as a function of
time. Backing creep becomes increasingly severe as
temperature increases. Its magnitude depends on the
particular material and on the size and geometry of the
strain gauge. .Flexibility .Describes the ability to survive
sharp bending without cracking or permanent deformation.
This is very important if the S/G have to be bonded to
curved surfaces..Elongation capability .Elongation capability is the
maximum strain which can be applied to a properly bonded
backing material before it cracks. Normally not
important for LC applications operating at 1000 um/m.
|
|
Epoxy resins |
Phenol resins |
Polyamides |
Load Cellrequires |
|
Shear modulus |
high |
high |
high |
high |
|
Creep |
low |
low |
low |
low |
|
Flexibility |
medium |
medium |
high |
not relevant |
|
Elongation capability |
low |
low |
low |
not relevant |
|
Peel strength |
medium |
medium |
high |
medium |
|
Insulation resistance |
high |
high |
high |
high |
|
Bond ability |
high |
medium |
high |
high |
|
|
|
|
|
|
|
应变计安装在具有某一线膨胀系数的试件上，试件可以自由膨胀并不受外力作用，在缓慢升（或降）温的均匀温度场内，由温度变化引起的指示应变称为热输出。热输出是由应变计敏感栅材料的电阻温度系数和敏感栅材料与被测试件材料之间线膨胀系数的差异共同作用、迭加的结果，可由以下公式表示：
εT=（αm-αg+αρ/k）ΔT
εT—输出
αm—弹性体材料热膨胀系数
αg-－金属箔材热膨胀系数
αρ -- 金属箔材电阻温度系数(TCR)
k—应变计灵敏系数
ΔT—测试温度范围
热输出是静态应变测量中最大的误差源,而且应变计的热输出分散随着热输出值的增大而增大.当测试环境存在温度梯度或瞬变时,这种差异就更大.因此,理想的情况是应变计的热输出值超于零,满足这一要求的应变计称为温度自补偿应变计。
通过调整合金成配比,改变冷轧成型压缩率以及适当的热处理,可以使敏感栅材料的内部晶体结构重新组合,改变其电阻温度系数,从而使应变计的热输出超过零,实现对弹性元件的温度自补偿。
All electrical conductors display changes in
resistively with temperature. This phenomenon is
referred to as temperature coefficient of resistively (TCR).
Strain gages made from different of strain-sensing
alloys, such as constantan and modified nickel-chromium
foil. A bonded strain gage without any mechanical
strain, when the environment temperature changes, the
resistance of strain gage changes correspondence, the
effect is called strain gage’s thermal output (apparent
strain).This apparent strain is a source of error when
such gages are used for measurement of static strains.
In order to obtain accurate data from strain gage in a
wild temperature ranges, it is necessary to compensate
the error due to thermal output. The best way for
compensation is use self-Temperature Compensation Strain
gages (S-T-C gages). The best transducer accuracy will
be achieved by selecting the (S-T-C) number of the gages
to match the thermal expansion coefficient of the spring
material.
|
|
|
|
|
|
|
传感器弹性元件因其材料的滞弹性效应而存在固有微蠕变特性，表现为传感器的输出随时间增加而增加（正蠕变）。电阻应变计的基底和贴片用粘结剂具有一定的粘弹性，使应变计的输出随时间的增加而减少；而敏感栅材料存在滞弹性效应使应变计输出随时间的增加而增加，迭加后的结果是应变计在承受固定载荷时呈现或正或负的蠕变特性，其方向和数值可以通过改变敏感栅结构设计、调整基底材料配比及关键工艺参数加以调节。在弹性体确定后选择蠕变与弹性体固有蠕变数值相等但方向相反的应变计，就能对弹性体本身的不完善性进行补偿。同理，对传感器制造过程中其他因素引入的蠕变误差也可以用此方法进行调整，并把传感器的综合蠕变数值控制在最小范围内，这就是应变计蠕变补偿的基本原理。
选用方法：
（1）首次使用时，可选用一种或两种蠕变相差较大（不同蠕变标号）的应变计粘贴在弹性体上，根据实测的综合蠕变大小和方向最终确定与传感器相匹配的蠕变标号。
（2）对弹性体材料、结构相同的传感器来说，量程越小，蠕变越正，应选择蠕变越负的应变计。
（3）不同弹性体材料具有不同的蠕变特性，应选用不同蠕变标号的应变计。
（4）传感器的系统蠕变除与弹性体、应变计、粘结剂等主要因素有关外。还受密封结构形式、防护胶、生产工艺参数等影响。但这种误差的量值和方向是可预知的，选择蠕变标号时应一同考虑。
Strain gage transducers sometimes exhibit small
values of creep. Creep is time-dependent change in
transducer output. Transducer’s creep is caused by
spring element, gage matrix, sensing grid, the gage
manufacturing process, the transducer manufacturing
process etc. Spring element exhibit positive creep.
Strain gage and adhesive exhibit negative creep. The
same spring element material and structure has same
positive creep value. Negative creep is caused by the
high shear stress in both the strain gage backing and
adhesive near the ends of the grid. So if we design the
different ends of the grid, we could get the different
negative creep value. The strain gage and adhesive
negative creep value equal to spring element positive
creep value. We could minimum the creep of transducers.
This type of strain gage we called creep
self-compensation strain gage. Creep code means
different rate of the ends of grid.
|
|
|
|
BB
系列电阻应变计以玻璃纤维增强酚醛树脂为基底材料，通过特殊的热层压工艺将金属箔材与非金属玻璃纤维增强的酚醛基底牢固的粘接成一体，该电阻应变计具有耐热性好，蠕变小，热滞后小，长期稳定性好等特点。
BB series of strain gages using Phenol resins as a
backing material. They are employed with glass fibre
reinforcement in a lamination process. Their high
stiffness, low creep tendency and low thermal expansion
coefficient is ideal for Load cell applications.
技术参数 Technical Data
|
基底厚度 Thickness of base
μm |
35±10 |
|
覆盖层厚度 Thickness of cover μm |
25±10 |
|
电阻值 Normal resistance
Ω |
120,350,700,1000 |
|
电阻值对标称值的偏差 Resistance Tolerance % |
≤±0.3 |
|
灵敏系数 Gage Factor |
2.1 |
|
灵敏系数对平均值的分散 Dispersion of Gage Factor % |
≤±1 |
|
横向效应系数 Transverse sensitivity
% |
≤±1 |
|
使用温度范围 Temperature range ℃
|
-30~150 |
|
温度自补偿范围 STC code |
9,11,16,23 |
|
应变极限 Strain Limit
% |
2 |
|
疲劳寿命 Fatigue life ±1000με |
107 |
|
|
|
|
|
|
|
BAS
系列电阻应变计以特殊聚酰亚胺薄膜为基底材料,通过特殊热层压工艺使其与金属敏感材料箔材具有优异的粘接力.
特殊聚酰亚胺具有高弹性模量,高抗拉性,低延伸率,高抗酸碱性,极低的热膨胀系数和热收缩性.非常适合制作高精度,高稳定性电阻应变计.
BAS 系列电阻应变计具有如下特点:
1.基底厚度均匀
和一般浇铸工艺不同,BAS系列采用叠层式制作工艺,这样可以最大限度的减小基底和覆盖保护膜的厚度不均匀而造成传感器性能的离散.BAS基底的不均匀度<0.8µm,保护层<0.3µm,每片间的不均匀度<1µm.
2.剥离强度高
为了提高粘结强度,BAS应变计在制作时首次采用了材料表面的SGA生成技术,这是一种通过特殊工艺在材料表面生成一种特殊分子膜,从而使基底材料和金属箔在粘合时产生极大亲和力,经测试其剥离强度(θ)在静态常温时达到368~375g/cm.
3.高弹性模量
BAS应变计的另一个显著特点是基底材料的高弹模性,它的抗拉模量是普通聚酰亚胺的3倍左右,同BB型应变计相当.因而保证了传感器具有极佳的线性和蠕变效应.减少传感器的小干扰度,并使传感器的响应速率和回零指标有明显的提高.
4.防潮效果好
BAS系列应变计的基底和覆盖层采用了同样的材料和粘结剂,这样可使外界温度对其影响具有某种抵消作用,并使这种影响降到最低限度,从而提高传感器的稳定性.同时利用聚酰亚胺本身特有的优良物理,化学性能及粘结层的强粘接力条件,使BAS应变计的防潮性能得到充分展示.
BAS series of strain gages using special polyimide
film as a backing material, through special heating
lamination process, the peel strength between foil and
backing is high enough.
Special polyimide film demonstrates outstanding
mechanical characteristics through a wide temperature
range. Its display high tensile strength and shear
modulus, and also features outstanding long-term heat
resistance. Another advantage inherent in this film is
its high resistance to hydrolysis.
This film exhibits excellent electrical characteristics
over a wide range of temperatures and frequencies. Even
at high temperature, the film shows remarkably slight
deterioration in its electrical properties.
The film boats the highest heat resistance of any other
films. Its major features include smaller values in both
heat shrinkage and thermal linear expansion
coefficients.
This film is insoluble in all organic solvents and is
sufficiently resistant to virtually any chemicals;
include inorganic acid and alkali solution. This film
features low water absorption and hygroscopic expansion.
Another advantage inherent is its low absorption/desorption
speeds and superior weather resistance.
Different then other casting polyimide backing, the base
and encapsulate cover of BAS series of strain gages has
uniform thickness. It’s the ideal for making high
stability strain gages.
技术参数 Technical Data
|
基底厚度 Thickness of base μm |
25±0.4 12.5±0.3 8±0.2 |
|
覆盖层厚度 Thickness of cover
μm |
12.5±0.3 8±0.2 |
|
电阻值 Normal resistance
Ω |
120,350,700,1000 |
|
电阻值对标称值的偏差 Resistance Tolerance % |
≤±0.3 |
|
灵敏系数 Gage Factor |
2.1 |
|
灵敏系数对平均值的分散 Dispersion of Gage Factor % |
≤±1 |
|
横向效应系数 Transverse sensitivity
% |
≤±1 |
|
使用温度范围 Temperature range ℃
|
-30~200 |
|
温度自补偿范围 STC code |
9,11,16,23 |
|
应变极限 Strain Limit
% |
5 |
|
疲劳寿命 Fatigue life ±1000με |
107 |
|
|
|
|
|
|
|
BF 系列电阻应变计以改性酚醛树脂为基底材料，全密封结构，蠕变小，粘贴方便，适合制作中等精度称重传感器。
BF series strain gage using modified phenolic resins
as backing material, fully encapsulated. low creep
performance and simple operation. It is suitable for
making middle class transducer.
技术参数 Technical Data
|
基底厚度 Thickness of base
μm |
35±10 |
|
覆盖层厚度 Thickness of cover
μm |
25±10 |
|
电阻值 Normal resistance
Ω |
120,350,700,1000 |
|
电阻值对标称值的偏差 Resistance Tolerance % |
≤±0.3 |
|
灵敏系数 Gage Factor |
2.0~2.2 |
|
灵敏系数对平均值的分散 Dispersion of Gage Factor % |
≤±1 |
|
横向效应系数 Transverse sensitivity
% |
≤±1 |
|
使用温度范围 Temperature range ℃
|
-30~80 |
|
温度自补偿范围 STC code |
9,11,16,23 |
|
应变极限 Strain Limit
% |
2.5 |
|
疲劳寿命 Fatigue life ±1000με |
107 |
|
|
|
|
|
|
|
|
BH
系列电阻应变计以玻璃纤维增强环氧树脂为基底材料，通过特殊的热层压工艺将金属箔材与非金属玻璃纤维增强的环氧基底牢固的粘接成一体，该电阻应变计具有耐热性好，蠕变小，粘贴性好，长期稳定性好等特点。
BH series of strain gages using Epoxy resins as a
backing material. They are employed with glass fibre
reinforcement in a lamination process. Their high
stiffness, low creep tendency and simple operation is
ideal for Load cell applications
技术参数 Technical Data
|
基底厚度 Thickness of base
μm |
35±10 |
|
覆盖层厚度 Thickness of cover
μm |
25±10 |
|
电阻值 Normal resistance
Ω |
120,350,700,1000 |
|
电阻值对标称值的偏差 Resistance Tolerance % |
≤±0.3 |
|
灵敏系数 Gage Factor |
2.0~2.2 |
|
灵敏系数对平均值的分散 Dispersion of Gage Factor % |
≤±1 |
|
横向效应系数 Transverse sensitivity
% |
≤±1 |
|
使用温度范围 Temperature range ℃
|
-30~150 |
|
温度自补偿范围 STC code |
9,11,16,23 |
|
应变极限 Strain Limit
% |
3 |
|
疲劳寿命 Fatigue life ±1000με |
107 |
|
|
|
|
|
|
|
|
形式
Pattern |
型号
Model |
敏感珊尺寸(L*W)
Grid DIM |
基底尺寸(L*W)
Backing DIM |
蠕变编号
Creep code |
|
mm |
inch |
mm |
inch |
|
BB350-2AA(**) |
2*2 |
0.079*0.079 |
5.3*3 |
0.21*0.12 |
|
|
BB350-2AA(**) |
2*4.5 |
0.079*0.177 |
6.5*5.5 |
0.256*0.21 |
|
|
BB350-3AA(**) |
3*3 |
0.118*0.118 |
8*4.5 |
0.315*0.177 |
|
|
BB350-3AA(**) |
3*4 |
0.118*0.157 |
8*5.6 |
0.315*0.22 |
|
|
BB350-5AA(**) |
5*3 |
0.197*0.118 |
10*4.6 |
0.394*0.181 |
|
|
BB350-6AA(**) |
6*3 |
0.236*0.118 |
12*4.5 |
0.472*0.177 |
|
|
BB500-3AA(**) |
3*3.2 |
0.118*0.126 |
8*4.6 |
0.315*0.181 |
|
|
BB700-3AA(**) |
3.2*3.4 |
0.126*0.134 |
8*5 |
0.315*0.394 |
|
|
BB700-5AA(**) |
5*3 |
0.197*0.118 |
10*4.6 |
0.394*0.181 |
|
|
BB700-6AA(**) |
6*3 |
0.236*0.118 |
12*4.5 |
0.472*0.177 |
|
|
BB1000-3AA(**) |
3*4.5 |
0.118*0.177 |
8*5.6 |
0.315*0.22 |
|
|
BB1000-5AA(**) |
5*3 |
0.197*0.118 |
10*4.6 |
0.394*0.181 |
|
|
BB1000-6AA(**) |
6*3 |
0.236*0.118 |
12*4.5 |
0.472*0.177 |
|
 |
BB350-2HA-A(S) |
2*2.8 |
0.079*0.11 |
10*6.5 |
0.394*0.256 |
|
|
BB350-3HA-A(S) |
3*2.3 |
0.118*0.09 |
10*7 |
0.394*0.276 |
|
|
BB350-4HA-A(S) |
4*3 |
0.157*0.118 |
10*8 |
0.394*0.315 |
|
|
BB700-3HA-A(S) |
3*2.5 |
0.118*0.098 |
9.5*7 |
0.374*0.276 |
|
|
BB700-4HA-A(S) |
4*3 |
0.157*0.118 |
10*8 |
0.394*0.315 |
|
|
BB1000-3HA-A(S) |
3*2.8 |
0.118*0.110 |
11*7 |
0.433*0.276 |
|
|
BB1000-4HA-A(S) |
4*3 |
0.157*0.118 |
10*8 |
0.394*0.315 |
|
|
BB350-2HA-B(S) |
2*2.8 |
0.079*0.11 |
10*6.5 |
0.394*0.256 |
|
|
BB350-3HA-B(S) |
3*2.3 |
0.118*0.09 |
10*7 |
0.394*0.276 |
|
|
BB350-4HA-B(S) |
4*3 |
0.157*0.118 |
10*8 |
0.394*0.315 |
|
|
BB700-3HA-B(S) |
3*2.5 |
0.118*0.098 |
9.5*7 |
0.374*0.276 |
|
|
BB700-4HA-B(S) |
4*3 |
0.157*0.118 |
10*8 |
0.394*0.315 |
|
|
BB1000-3HA-B(S) |
3*2.8 |
0.118*0.110 |
11*7 |
0.433*0.276 |
|
|
BB1000-4HA-B(S) |
4*3 |
0.157*0.118 |
10*8 |
0.394*0.315 |
|
 |
BB350-3HA-B |
3*2.3 |
0.118*0.09 |
8.7*7 |
0.343*0.276 |
|
|
BB350-4HA-B |
4*3 |
0.157*0.118 |
9*8 |
0.354*0.315 |
|
|
BB700-3HA-B |
3*3 |
0.118*0.118 |
9*7 |
0.354*0.276 |
|
|
BB700-4HA-B |
4*3 |
0.157*0.118 |
9*8 |
0.354*0.315 |
|
|
BB350-3HA-A |
3*2.3 |
0.118*0.09 |
8.7*7 |
0.343*0.276 |
|
|
BB350-4HA-A |
4*3 |
0.157*0.118 |
9*8 |
0.354*0.315 |
|
|
BB700-3HA-A |
3*3 |
0.118*0.118 |
9*7 |
0.354*0.276 |
|
|
BB700-4HA-A |
4*3 |
0.157*0.118 |
9*8 |
0.354*0.315 |
|
|
BB350-3HA-S |
3*2.3 |
0.118*0.09 |
9.9*3.75 |
0.39*0.148 |
|
|
BB350-4HA-S |
4*3 |
0.157*0.118 |
9.9*4.9 |
0.39*0.193 |
|
|
BB700-4HA-S |
4*3 |
0.157*0.118 |
9.9*4.9 |
0.39*0.193 |
|
形式
Pattern |
型号
Model |
敏感珊尺寸(L*W)
Grid DIM |
基底尺寸(L*W)
Backing DIM |
中心距离
Grid distance
mm |
|
mm |
inch |
mm |
inch |
|
BB350-2BB-A |
2*2 |
0.079*0.079 |
8*6 |
0.315*0.236 |
|
|
BB350-3BB-A |
3*3 |
0.118*0.118 |
9*7 |
0.354*0.276 |
|
|
BB500-2BB-A |
2*4.5 |
0.079*0.177 |
8*6 |
0.315*0.236 |
|
|
BB500-3BB-A |
3*3.2 |
0.118*0.126 |
9*7 |
0.354*0.276 |
|
|
BB350-2GB |
2*2 |
0.079*0.079 |
10*3.5 |
0.394*0.138 |
6 |
|
BB350-3GB |
3*3 |
0.118*0.118 |
10*4.5 |
0.394*0.177 |
6 |
|
BB350-3GB |
3*3 |
0.118*0.118 |
14.5*4.5 |
0.571*0.177 |
10.5 |
|
BB350-3GB |
3*3 |
0.118*0.118 |
16*4.5 |
0.630*0.177 |
12 |
|
BB350-2FB |
2*2 |
0.079*0.079 |
6.5*5.5 |
0.256*0.21 |
|
|
BB350-3FB |
3*3 |
0.118*0.118 |
8*8 |
0.315*0.315 |
|
|
BB500-3FB |
3*3.2 |
0.118*0.126 |
8*10 |
0.315*0.394 |
|
|
BB1000-3FB |
3*3 |
0.118*0.118 |
8*8 |
0.315*0.315 |
|
|
BB350-2BB |
2.2*3 |
0.087*0.118 |
8*6 |
0.315*0.236 |
|
|
BB350-3BB |
3*3.2 |
0.087*0.126 |
9*7 |
0.354*0.276 |
|
|
BB500-2BB |
2.2*3 |
0.087*0.118 |
8*6 |
0.315*0.236 |
|
|
BB500-3BB |
3*3.2 |
0.087*0.126 |
9*7 |
0.354*0.276 |
|
 |
BB350-2GB-A |
2*2 |
0.079*0.079 |
10*3.5 |
0.394*0.138 |
6 |
|
BB350-3GB-A |
3*3 |
0.118*0.118 |
10*4.5 |
0.394*0.177 |
6 |
|
BB350-3GB-A |
3*3 |
0.118*0.118 |
14.5*4.5 |
0.571*0.177 |
10.5 |
|
BB350-3GB-A |
3*3 |
0.118*0.118 |
16*4.5 |
0.630*0.177 |
12 |
|
BB500-3GB-A |
3*3.2 |
0.118*0.126 |
14.5*4.5 |
0.571*0.177 |
10.5 |
|
BB1000-3GB-A |
3*3 |
0.118*0.118 |
14.5*4.5 |
0.571*0.177 |
10.5 |
|
BB350-3GB |
3*3 |
0.118*0.118 |
14.5*7.2 |
0.571*0.283 |
6 |
|
BB350-3GB |
3*3 |
0.118*0.118 |
18*7.2 |
0.709*0.283 |
10.5 |
|
BB350-3GB |
3*3 |
0.118*0.118 |
19.5*7.2 |
0.768*0.283 |
12 |
|
BB500-3GB |
3*3.2 |
0.118*0.126 |
18*7.2 |
0.709*0.283 |
10.5 |
|
BB1000-3GB |
3*3 |
0.118*0.118 |
18*7.2 |
0.709*0.283 |
10.5 |
 |
BB350-9KA |
Φ9 |
Φ0.354 |
Φ10 |
Φ0.394 |
|
|
BB350-12KA |
Φ12 |
Φ0.472 |
Φ13 |
Φ0.512 |
|
|
BB350-15KA |
Φ15 |
Φ0.59 |
Φ16 |
Φ0.630 |
|
|
BB350-18KA |
Φ18 |
Φ0.709 |
Φ19 |
Φ0.748 |
|
|
|
|
|
|
|
|
电阻应变计广泛应用于各类应变，应力测试，BA系列电阻应变计是应力分析的最佳选择。
Standard strain gage are widely used in stress
analysis. BA series strain gage using cast polyimide
backing as base material, fully encapsulated. Its
excellent heat-resistance and wide temperature range are
suitable for precision stress analysis.
技术参数 Technical Data
|
基底厚度 Thickness of base
μm |
35±10 |
|
覆盖层厚度 Thickness of cover
μm |
25±10 |
|
电阻值 Normal resistance
Ω |
120,350,700,1000 |
|
电阻值对标称值的偏差 Resistance Tolerance %
|
≤±0.3 |
|
灵敏系数 Gage Factor |
2.1 |
|
灵敏系数对平均值的分散 Dispersion of Gage Factor % |
≤±1 |
|
横向效应系数 Transverse sensitivity
% |
≤±1 |
|
使用温度范围 Temperature range ℃
|
-30~150 |
|
温度自补偿范围 STC code |
9,11,16,23 |
|
应变极限 Strain Limit
% |
5 |
|
疲劳寿命 Fatigue life ±1000με |
107 |
|
形式
Pattern
|
型号
Model
|
敏感珊尺寸(L*W)
Grid DIM
|
基底尺寸(L*W)
Backing DIM
|
|
mm
|
inch
|
mm
|
inch
|
|
|
BA60-2AA(**)
|
2*2
|
0.079*0.079
|
5.3*3
|
0.21*0.12
|
|
BA60-2AA(**)
|
2*3
|
0.079*0.118
|
6.5*4.5
|
0.256*0.177
|
|
BA60-3AA(**)
|
3*3
|
0.118*0.118
|
8*4.5
|
0.315*0.177
|
|
BA60-3AA(**)
|
3*4
|
0.118*0.157
|
8*5.6
|
0.315*0.22
|
|
BA60-5AA(**)
|
5*3
|
0.197*0.118
|
10*4.6
|
0.394*0.181
|
|
BA60-6AA(**)
|
6*3
|
0.236*0.118
|
12*4.5
|
0.472*0.177
|
|
BA120-3AA(**)
|
3*3.2
|
0.118*0.126
|
8*4.6
|
0.315*0.181
|
|
BA120-3AA(**)
|
3.2*3.4
|
0.126*0.134
|
8*5
|
0.315*0.394
|
|
BA120-5AA(**)
|
5*3
|
0.197*0.118
|
10*4.6
|
0.394*0.181
|
|
BA120-6AA(**)
|
6*3
|
0.236*0.118
|
12*4.5
|
0.472*0.177
|
|
BA350-3AA(**)
|
3*4.5
|
0.118*0.177
|
8*5.6
|
0.315*0.22
|
|
BA350-5AA(**)
|
5*3
|
0.197*0.118
|
10*4.6
|
0.394*0.181
|
|
BA350-6AA(**)
|
6*3
|
0.236*0.118
|
12*4.5
|
0.472*0.177
|
|
|
BA120-2HA-A(S)
|
2*2.8
|
0.079*0.11
|
10*6.5
|
0.394*0.256
|
|
BA120-3HA-A(S)
|
3*2.3
|
0.118*0.09
|
10*7
|
0.394*0.276
|
|
BA120-4HA-A(S)
|
4*3
|
0.157*0.118
|
10*8
|
0.394*0.315
|
|
BA350-3HA-A(S)
|
3*2.5
|
0.118*0.098
|
9.5*7
|
0.374*0.276
|
|
BA350-4HA-A(S)
|
4*3
|
0.157*0.118
|
10*8
|
0.394*0.315
|
|
|
BA120-2HA-B(S)
|
2*2.8
|
0.079*0.11
|
10*6.5
|
0.394*0.256
|
|
BA120-3HA-B(S)
|
3*2.3
|
0.118*0.09
|
10*7
|
0.394*0.276
|
|
BA120-4HA-B(S)
|
4*3
|
0.157*0.118
|
10*8
|
0.394*0.315
|
|
BA350-3HA-B(S)
|
3*2.5
|
0.118*0.098
|
9.5*7
|
0.374*0.276
|
|
BA350-4HA-B(S)
|
4*3
|
0.157*0.118
|
10*8
|
0.394*0.315
|
|
|
BA120-3HA-B
|
3*2.3
|
0.118*0.09
|
8.7*7
|
0.343*0.276
|
|
BA120-4HA-B
|
4*3
|
0.157*0.118
|
9*8
|
0.354*0.315
|
|
BA350-3HA-B
|
3*3
|
0.118*0.118
|
9*7
|
0.354*0.276
|
|
BA350-4HA-B
|
4*3
|
0.157*0.118
|
9*8
|
0.354*0.315
|
|
|
BA120-3HA-A
|
3*2.3
|
0.118*0.09
|
8.7*7
|
0.343*0.276
|
|
BA120-4HA-A
|
4*3
|
0.157*0.118
|
9*8
|
0.354*0.315
|
|
BA350-3HA-A
|
3*3
|
0.118*0.118
|
9*7
|
0.354*0.276
|
|
BA350-4HA-A
|
4*3
|
0.157*0.118
|
9*8
|
0.354*0.315
|
|
|
BA120-3HA-S
|
3*2.3
|
0.118*0.09
|
9.9*3.75
|
0.39*0.148
|
|
BA120-4HA-S
|
4*3
|
0.157*0.118
|
9.9*4.9
|
0.39*0.193
|
|
BA350-4HA-S
|
4*3
|
0.157*0.118
|
9.9*4.9
|
0.39*0.193
|
|
|
BA120-2BB-A
|
2*2
|
0.079*0.079
|
8*6
|
0.315*0.236
|
|
BA120-3BB-A
|
3*3
|
0.118*0.118
|
9*7
|
0.354*0.276
|
|
BA350-2BB-A
|
2*4.5
|
0.079*0.177
|
8*6
|
0.315*0.236
|
|
BA350-3BB-A
|
3*3.2
|
0.118*0.126
|
9*7
|
0.354*0.276
|
|
形式
Pattern
|
型号
Model
|
敏感珊尺寸(L*W)
Grid DIM
|
基底尺寸(L*W)
Backing DIM
|
|
mm
|
inch
|
mm
|
inch
|
|
BA120-2FB
|
2*2 |
0.079*0.079 |
6.5*5.5 |
0.256*0.21 |
|
BA120-3FB
|
3*3 |
0.118*0.118 |
8*8 |
0.315*0.315 |
|
BA350-3FB
|
3*3.2 |
0.118*0.126 |
8*10 |
0.315*0.394 |
|
BA120-9KA
|
Φ9 |
Φ0.354 |
Φ10 |
Φ0.394 |
|
BA120-12KA
|
Φ12 |
Φ0.472 |
Φ13 |
Φ0.512 |
|
BA120-15KA
|
Φ15 |
Φ0.59 |
Φ16 |
Φ0.630 |
|
BA120-18KA
|
Φ18 |
Φ0.709 |
Φ19 |
Φ0.748 |
|
BA120-2BC-A
|
2*2 |
0.079*0.079 |
9*9 |
0.354*0.354 |
|
BA120-3BC-A
|
3*2.1 |
0.118*0.083 |
11*11 |
0.433*0.433 |
|
BA120-5BC-A
|
5*2.6 |
0.197*0.102 |
16*16 |
0.630*0.630 |
|
BA120-6BC-A
|
6*3 |
0.236*0.118 |
18*18 |
0.709*0.709 |
|
BA120-2BC
|
2*2 |
0.079*0.079 |
7*7 |
0.276*0.276 |
|
BA120-3BC
|
3*2.1 |
0.118*0.083 |
9*9 |
0.354*0.354 |
|
BA120-5BC
|
5*2.6 |
0.197*0.102 |
11*11 |
0.433*0.433 |
|
BA120-6BC
|
6*3 |
0.236*0.118 |
13*13 |
0.512*0.512 |
|
BA120-2CB-A
|
2*2 |
0.079*0.079 |
11*11 |
0.433*0.433 |
|
BA120-3CB-A
|
3*2.1 |
0.118*0.083 |
13*13 |
0.512*0.512 |
|
BA120-5CB-A
|
5*2.6 |
0.197*0.102 |
18*18 |
0.709*0.709 |
|
BA120-6CB-A
|
6*3 |
0.236*0.118 |
20*20 |
0.787*0.787 |
|
BA120-2CB-B
|
2*2 |
0.079*0.079 |
10*10 |
0.394*0.394 |
|
BA120-3CB-B
|
3*2.1 |
0.118*0.083 |
12*12 |
0.472*0.472 |
|
BA120-5CB-B
|
5*2.6 |
0.197*0.102 |
18*18 |
0.709*0.709 |
|
BA120-6CB-B
|
6*3 |
0.236*0.118 |
20*20 |
0.787*0.787 |
|
BA120-2CB-C
|
2*2 |
0.079*0.079 |
13*13 |
0.512*0.512 |
|
BA120-3CB-C
|
3*2.1 |
0.118*0.083 |
16*16 |
0.630*0.630 |
|
BA120-5CB-C
|
5*2.6 |
0.197*0.102 |
20*20 |
0.787*0.787 |
|
BA120-6CB-C
|
6*3 |
0.236*0.118 |
22*22 |
0.866*0.866 |
|
BA120-2CB
|
2*2 |
0.079*0.079 |
7*7 |
0.276*0.276 |
|
BA120-3CB
|
3*2.1 |
0.118*0.083 |
9*9 |
0.354*0.354 |
|
BA120-5CB
|
5*2.6
|
0.197*0.102
|
11*11
|
0.433*0.433
|
|
BA120-6CB
|
6*3
|
0.236*0.118
|
13*13
|
0.512*0.512
|
|
|
|
|
|
|
|
|
名称
Product |
型号
Mode |
|
内容
Item |
包装
Package |
|
贴片胶
Adhesive |
YL-610 |
 |
二组份酚醛环氧型
two parts hot curing adhesive |
15ml |
|
XP-740 |
二组份酚醛环氧型
two parts hot curing adhesive |
15ml |
|
YL-1 |
一组份酚醛胶
one part bakelite adhesive |
15,50ml |
|
清洗剂
Cleaner |
H-1 |
 |
弹性体表面清洗剂
Alcohol based solvent cleaner
|
50,100ml |
|
H-2 |
焊剂清洗剂
Flux cleaner |
50,100ml |
|
导线
Wires |
WR-1 |
 |
银丝
Silver wire |
250m |
|
WR-2 |
康铜丝
Constantan wire |
150m |
|
WR-3 |
铜丝
Copper wire |
150m |
|
笔
Pen |
PC-1 |
 |
擦笔
Sandy-pencil |
支per |
|
PC-2 |
刷笔
Brush |
|
接线端
Terminals |
TL-1 |
 |
3*1.5mm |
50 pieces/pack |
|
TL-2 |
6*2.5mm |
|
胶带
Tapes |
TP-1 |
 |
聚脂胶带
Mylay tape |
15mm*66m |
|
TP-2 |
聚酰亚胺胶带
Kapton tape |
15mm*66m |
|
TP-3 |
聚四氟乙烯胶带
Teflon tape
|
25mm*10m |
|
焊丝
Solder |
SD-1 |
 |
Ø0.5 |
0.5kg/Roll |
|
SD-2 |
Ø0.8 |
1kg/Roll |
|
|
|
|
|
应变片
传感器/变送器/仪表按厂商品牌选用指南
