CN201653608U - High-intelligent resistance strain gage sensor - Google Patents

High-intelligent resistance strain gage sensor Download PDF

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CN201653608U
CN201653608U CN201020182160XU CN201020182160U CN201653608U CN 201653608 U CN201653608 U CN 201653608U CN 201020182160X U CN201020182160X U CN 201020182160XU CN 201020182160 U CN201020182160 U CN 201020182160U CN 201653608 U CN201653608 U CN 201653608U
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sensor
strain gauge
strain
bridge circuit
strain gage
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CN201020182160XU
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Chinese (zh)
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何俊俊
李恩民
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长沙同盛电子科技有限公司
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Abstract

The utility model discloses a high-intelligent resistance strain gage sensor comprising a strain gage bridge circuit arranged on a point under test, a singlechip, an A/D converter, a storage and a temperature chip, which are all integrated and packaged on a PCB. The sensor is characterized in that the strain gage bridge circuit is of a half-bridge structure consisting of two strain gages and two standard resistances which are connected; the output end of the strain gage bridge circuit is connected with the signal input end of the singlechip through the A/D converter; and the singlechip is connected with the storage and the temperature chip. The utility model has convenient installation and simple operation; the storage is sealed with the sensor, and the information such as the serial number, calibration parameter and tested data of the sensor is permanently stored in the storage of the sensor, even if a transmission cable of the sensor is broken, the historical test data can be retrieved from the sensor by connecting the transmission cable again, the new test can be recovered, and the stability and reliability are greatly improved.

Description

高智能电阻应变片式传感器 Intelligent resistance strain gauge sensors

技术领域 FIELD

[0001] 本实用新型涉及传感器,尤其涉及一种面向岩土工程监测领域的、可用于监测高速公路、桥梁以及建筑基坑等所承压力变化的高智能电阻应变片式传感器。 [0001] The present invention relates to sensors, and particularly to a field-oriented geotechnical engineering can be used to monitor highways, bridges and building foundation or the like bearing pressure changes intelligent resistance strain gauge sensors.

背景技术 Background technique

[0002] 电阻应变片式传感器的原理是利用金属的电阻应变效应,通过电阻应变片将应变量转换为电阻的变化量,测得电阻的变化量就可以得出相应的应变量。 [0002] The principle of resistance strain gauge sensor is a metal strain resistance effect, by converting the strain amount of the strain gauges change in resistance, the amount of change in the measured resistance can be obtained the corresponding variables. 因为电阻的变化往往是很微小的,假如采用直接单片电阻变化根据AR/R = Kse (其中,灵敏系数——K、电阻值——R、AR—应变片电阻变化量、ε —应变)存在很多缺点,例如:温度影响、灵敏度差等。 Because the change in resistance is often very small, if the resistance changes in accordance with a monolithic direct AR / R = Kse (wherein, sensitivity coefficient - K, the resistance value of --R, AR- gauge resistance change amount, ε - strain) There are many disadvantages, for example: temperature, poor sensitivity. 因此须采用专门的测量电路——电桥测量电路,这种测量电路不仅测量准确度高,且可以进行温度补充。 Therefore subject to the use of specialized measurement circuit - bridge measurement circuit, measuring circuit which measures not only highly accurate, and can be supplemented temperature. 根据供桥电源的不同,电桥可分为直流电桥和交流电桥。 Depending on the power source for the bridge, the bridge can be divided into AC and DC bridge bridge. 常见电阻应变式传感器由弹性敏感元件、电阻应变计、补偿电阻和外壳组成,可根据具体测量要求设计成多种结构形式。 Common resistance strain sensor sensitive element by an elastic, resistance strain gauge, the compensation resistors and the shell composition, may be designed to form a variety of configurations depending on the particular measurement requirements. 弹性敏感元件受到所测量的力而产生变形,并使附着其上的电阻应变计一起变形。 By the elastic force sensitive element measured deformed, and attached thereto a strain gauge resistors deformed together. 电阻应变计再将变形转换为电阻值的变化而转化为电桥的电压发生变化,从而可以测量力、压力、扭矩、位移、加速度和温度等多种物理量。 Deformation resistance strain gauge and then converted to a resistance value change is converted into a change in voltage of the bridge, which can measure the force, pressure, torque, displacement, acceleration, and temperature and other physical quantities. 常用的电阻应变式传感器有应变式测力传感器、应变式压力传感器、应变式扭矩传感器(见转矩传感器)、应变式位移传感器(见位移传感器)、应变式加速度传感器(见加速度计)等。 Conventional resistance strain sensor has a strain gauge load cell, strain gauge pressure sensor, a strain gauge torque sensor (see torque sensor), the strain displacement sensor (see displacement sensor), a strain gauge acceleration sensor (see accelerometers) and the like. 电阻应变式传感器的优点是精度高,测量范围广,寿命长,结构简单,频响特性好,能在恶劣条件下工作,易于实现小型化、整体化和品种多样化等。 Advantage of resistance strain sensor is a high precision, wide measurement range, long life, simple structure, good frequency response, can work under severe conditions, miniaturization of the overall species diversity and the like. 因此它广泛应用于自动测试和控制技术中。 So it is widely used in automatic test and control technology.

[0003] 但现有传感器具有如下的缺点: [0003] However, conventional sensors have the following drawbacks:

[0004] 1、对于大应变有较大的非线性、输出信号较弱。 [0004] 1, has a large strain for large nonlinear, the output signal is weak.

[0005] 2、存在较大零点漂移等问题,影响测量结果。 [0005] 2, a larger zero drift problems, affecting the measurement results.

[0006] 3、传感器输出的是实测电压值,信号传输距离有限,还须依据标定曲线换算才能得出物体的被测物理量,测试速度慢,对测试人员的技术水平要求高; [0006] 3, the sensor output is the actual measurement voltage value, the signal transmission distance is limited, based on the calibration curve must in order to obtain the measured physical quantity in terms of objects, slow test, the tester high level of technical requirements;

[0007] 4、当传感器被大量埋设在工程结构中作长期质量监控期间,易造成传感器编号和标定参数的丢失,以至测量出传感器频率值也无法算出相应的物理量的无效数据情况。 [0007] 4, when a large number of sensors are embedded as during long-term quality control in engineering structures, could easily lead to the loss of sensor number and calibration parameters, as well as a sensor to measure the frequency value can not be calculated case of invalid data corresponding physical quantity.

实用新型内容 SUMMARY

[0008] 本实用新型所解决的技术问题在于提供一种高智能电阻应变片式传感器,以解决上述背景技术中的缺点。 [0008] The present invention solves the technical problem is to provide an intelligent high-resistance strain gage transducers, in order to solve the above-described disadvantages of the background art.

[0009] 本实用新型所解决的技术问题采用以下技术方案来实现: [0009] The present invention is to solve the technical problem is achieved by the following technical solution:

[0010] 高智能电阻应变片式传感器,包括位于待测点的应变片桥式电路、单片机、模数转换器、存储器以及温度芯片,以上组件一体化封装在PCB板上,其中应变片桥式电路的输出端通过模数转换器接入单片机的信号输入端,所述单片机连接有存储器以及温度芯片,可以同时检测该测点的温度以及存储数据。 [0010] intelligent resistive strain gauge sensor comprising a strain gauge bridge circuit located at the point to be tested, the microcontroller analog to digital converter, a memory, and temperature of the chip, the integration of the above components packaged on a PCB, wherein the strain gauge bridge the output circuit analog-signal input terminal via the access microcontroller, the microcontroller is connected to a memory chip and a temperature can be detected and storing data of the temperature measuring points at the same time.

[0011] 本实用新型所述的高智能电阻应变片式传感器还包括有一个具有全球唯一编号的半导体温度传感器,半导体温度传感器置于单片机一端口的应变片应变位置,与应变片桥式电路、单片机、模数转换器、存储器以及温度芯片一体封装,可以实时监测该点的温度变化。 [0011] The present invention according intelligent resistive strain gauge sensor further comprises a globally unique number having a semiconductor temperature sensor, a semiconductor temperature sensor is a microcontroller port strain gage position, the strain gauge bridge circuit, MCU analog to digital converter, a memory integrally packaged chip and a temperature, a temperature change can be monitored in real time at that point.

[0012] 本实用新型中,所述应变片桥式电路可以为四个应变片连接成的桥式结构,也可以为由两个应变片与两个标准电阻连接成的半桥式结构。 [0012] In the present invention, the strain may be connected to a bridge configuration of four strain gauge bridge circuit chip, or may have a standard two strain gauges with two resistors connected in a half bridge configuration. 由于直流半桥具有以下优点:高稳定度的直流电压源易于获得;半桥电路还可以通过补偿片对测量片进行直接的温度补偿;调节平衡电路简单;传感器对测量电路的分布参数影响小。 Since the half-bridge DC has the following advantages: high stability of the direct voltage source readily available; half-bridge circuit may also be a direct measurement of the temperature compensation by the compensation plate sheet; balance adjusting circuit is simple; little effect on the sensor measuring circuit distribution parameters. 所以,本实用新型优选采用直流半桥电路。 Therefore, the present invention is preferably a half-bridge DC circuit.

[0013] 本实用新型中,所述应变片输入端连接有电子电位器,操作者可通过调整电子电位器的电阻,达到调节电桥平衡的效果,保证初始读取电压为零,起到调零作用。 [0013] In the present invention, the effect of the strain plate is connected to the input of an electronic potentiometer, the operator can adjust the resistance of the electronic volume, to regulate the balance of the bridge, to ensure that the initial zero voltage reading, play a tune zero effect.

[0014] 本实用新型中,所述温度芯片优先选用为DS18B20型温度计芯片,所述单片机优先采用的是芯片STC89C58RD。 [0014] In the present invention, the temperature of the chip is the preferred type thermometer DS18B20 chip, a microcontroller chip is advantageously employed STC89C58RD.

[0015] 本实用新型中,所述的存储器是串行接口的电可写只读存储器。 [0015] In the present invention, said memory is a serial interface electrically writable read-only memory.

[0016] 本实用新型的安装方式是将电阻应变片粘贴在传感器的特有钢材的弹性面(该钢材有一定弹性度,保证能随测量体变化而变化,但一般静止不动,随温度及外接变化小的特性),将电阻应变片牢固地粘贴在被测钢材某一测点处,随着钢铁发生变形,其形变传递到特有钢材,从而应变片电阻值也产生相应变化。 [0016] The installation of the present invention is resistive strain sensor attached to the elastic surface-specific steel (steel which has a degree of elasticity to ensure that the measuring body can vary with changes, but generally stationary, with temperature and external small variation characteristic), the resistance strain gage fixedly attached at a measuring point measured steel, with steel being deformed, which deformation is transmitted to a specific steel sheet so that the strain can produce a corresponding change in the resistance value. 测得的电阻值的改变量,即可计算得到测点外沿应变片方向的线应变值。 The amount of change of the resistance value measured, to obtain a wire strain gage measuring points outer edge direction is calculated. 由于待测点的应变量一般较小(以10_6量级计),引起应变片相应电阻的变化量也很小,采用半桥式直流电路来测量,即将应变片或应变片与标准电阻接成桥式电路,它将应变片的电阻信号转化为电压信号,从而可以测量出被测物体所受的力,或者是所受的压强或者直接测微应变,且输出数据都采用RS485信号,传输距离远以及可以挂接节点数量多,扩展容易兼容性强。 Since the strain point under test is generally small (in the order of terms 10_6), causing a corresponding change in resistance of the strain gauge is very small, the use of half-bridge DC circuit is measured, i.e. strain gauge or strain gauge resistor connected to a standard signal conversion resistor bridge circuit, strain gauges it into a voltage signal, which can measure the force on an object to be measured, or measured directly or suffered pressure microstrain, and outputs data using RS485 signal transmission distance the number of nodes away and can be attached, easily extended compatibility.

[0017] 有益效果:本实用新型安装方便、操作简单,存储器与传感器密封在一起,传感器的编号、标定参数、已测试数据等信息被永久性地存储在传感器的存储器中,即使传感器的传输线缆断损,只要重新接通就可从传感器中调出历史测试数据、并恢复新的测试,大大提高了稳定性和可靠性。 [0017] Advantageous Effects: The present invention is convenient to install, easy to operate, the memory sealed together with the sensor, the sensor number, calibration parameters, test data and other information has been permanently stored in a memory of the sensor, even if the sensor of the transmission line the cable is damaged and can be switched on again as long as the transfer from the sensor historical test data and restores the new test, the greatly improved stability and reliability.

附图说明 BRIEF DESCRIPTION

[0018] 图1为具体实施例示意图 [0018] FIG. 1 is a schematic view of the specific embodiments

[0019] 图2为本实用新型应变片桥式电路示意图 [0019] FIG 2 new strain gauge bridge circuit schematic diagram of the present utility

[0020] 图3为本实用新型应变片安装示意图 [0020] FIG. 3 is a schematic view of the gage is mounted disclosure

[0021] 图4为本实用新型原理示意图 Schematic [0021] FIG 4 is a principle of invention

具体实施方式 Detailed ways

[0022] 为了使本实用新型实现的技术手段、创作特征、达成目的与功效易于明白了解,下面结合具体图示,进一步阐述本实用新型。 [0022] In order to achieve the technical means of the present invention, the creation of features, to achieve the purpose and effect readily apparent appreciated that specifically illustrated below with reference to further illustrate the present invention.

[0023] 参见图1高智能电阻应变片式传感器示意图,包括位于待测点的应变片桥式电路、单片机、模数转换器、存储器以及温度芯片,以上组件一体化封装在PCB板上,其中应变片桥式电路的输出端通过模数转换器接入单片机的信号输入端,所述单片机连接有存储器 [0023] Referring to Figure 1 a high resistance strain gauge sensors intelligent schematic bridge circuit comprising strain gauges located at the point to be tested, the microcontroller analog to digital converter, a memory, and temperature of the chip, the integration of the above components packaged on a PCB, wherein the output of the strain gauge bridge circuit analog-signal input terminal via the access of the microcontroller, the microcontroller is connected to a memory

4以及温度芯片,可以同时检测该测点的温度以及存储数据。 4 and the temperature of the chip can be detected and storing data of the temperature measuring points at the same time. 本实施例采用电源模块提供5V 电源,为单片机供电,单片机输出信号采用RS485信号,所述应变片的输入端连接有电子电位器,操作者可通过调整电子电位器的电阻,达到调整电桥平衡的效果,保证初始读取电压为零,起到调零作用。 The present embodiment uses 5V power supply module for supply microcontroller, the microcontroller using RS485 signal the output signal of the strain gauge is connected to an input of an electronic potentiometer, the operator can adjust the resistance of the electronic volume, adjusted to achieve bridge balance effect, to ensure that initial read voltage is zero, zero play a role.

[0024] 参见图2为实用新型应变片桥式电路示意图,若R1、R2为应变片,而R3、R4为标准电阻,为半桥结构;若Rl、R2、R3、R4均为应变片,则为全桥结构。 [0024] Referring to FIG. 2 is a disclosure strain gauge bridge circuit schematic, if R1, R2 strain gauge, and R3, R4 are standard resistors, half bridge configuration; if Rl, R2, R3, R4 are strain gauges, compared with full-bridge configuration.

[0025] 本具体实施例采用半桥结构,标准电阻R3、R4可做温度补偿作用修正温度所产生 [0025] This particular embodiment employs a half-bridge configuration, standard resistors R3, R4 do temperature correction temperature compensation generated

的影响。 Impact. 当电桥的四个桥臂的电阻值满足: [0026]R1/R2=R3/R4[0027] 这一关系时,电桥平衡,即B、D间没有电压。 When the resistance value satisfied the four arm bridge: [0026] R1 / R2 = R3 R4 [0027] When this relationship, the bridge balance /, i.e. between B, D no voltage. 当其中某一电阻发生变化时,电桥失去平衡,从而B、D间有电压UBD。 Wherein when a change in resistance, the bridge out of balance, thus the voltage between the UBD B, D. 根据Ubd的大小可以计算相应的电阻变化量以及相应的线应变大小。 It can be calculated and the corresponding resistance change amount corresponding linear strain of a size according to the size Ubd. 电压的变化Ubd大小与钢材的形变量有一定的线性关系。 Ubd magnitude of the voltage change has a linear relationship with the deformation of the steel. 通过电脑可与前端采集模块通信,每次读取到电压Ubd模块的MCU再根据标定计算出钢铁的微应变,从而可以测量出被测物体所受的力,或者是所受的压强或者直接测微应变。 By communicating the front end computer may be collected with each read voltage to the MCU module Ubd then calculated according to the calibration microstrain steel, which can measure the force on an object to be measured, or measured directly or pressure suffered microstrain.

[0028] 常规应变传感器输出的一般为电压值输出电压值,还是经过换算才能得到物理量,且调平衡电路复杂(手动电阻器更加不稳定),也不能得到测点温度。 [0028] Usually the voltage value of the output voltage value of a conventional strain sensor output, or after conversion to obtain the physical quantity, and adjusting the balancing circuit complexity (more unstable resistor manually), the temperature measuring points can not be obtained. 而本实施例所述的高智能电阻应变片式传感器调零是采用的电子电位器,有效解决了上述问题。 And intelligent resistive strain gauge sensor zero embodiment of the present embodiment is the use of the electronic potentiometer, an effective solution to the above problems.

[0029] 本实施例所述高智能电阻应变片式传感器中的应变片安装方法如图3所示,补偿片R3、R4位于弹性体的非应变区域,而应变片位于弹性体的应变区域,因此,当应变片因受力关系而发生形变时,Rl和R2随着测点形变而使得电阻发生相应变化,R3和R4变化很小, 导致出现UBD发生变化。 [0029] The method of the present embodiment of the strain gage mounted intelligent resistive strain gauge sensor in the embodiment illustrated, the compensation sheet R3, R4 unstrained regions located elastomer FIG. 3, the strain gage is located in the region of the elastic member, Therefore, when the strain gauge is deformed due to the force relationship, Rl and R2 such that the strain measuring points with a corresponding change in resistance, R3 and R4 little change, resulting in changes in UBD. 实际中R3、R4温度补偿片是贴在与被测构件材料相同但不受力的试件上的应变片,该应变片充当温度补偿电阻用。 In practice R3, R4 temperature compensation film is attached to the test specimen member of the same material but with unstressed strain gauge, the strain gauge acts as a resistor with temperature compensation. 在测量过程中,补偿片应放置在被测点附近,以保证当环境温度改变时,测量片和补偿片的电阻Rl和R2为将发生相同的变化而不至于影响电桥的平衡。 During the measurement, the compensation plate should be placed in the vicinity of the measured point, in order to ensure that when the ambient temperature changes, measurement of sheet resistance Rl and R2 and the compensation sheet is the same change does not affect the balance of the bridge occurs.

[0030] 本实施例所述高智能电阻应变片式传感器原理如图4所示,前端应变片采集的电压接入到电路中,双极性信号加到单电源模数转换器AD623上,而输入单源电压,AD623可以去除共模电压并且对输入有用信号放大100倍。 [0030] intelligent resistive strain gauge sensor according to the present embodiment of the principles of the embodiment shown in Figure 4, the front end of the strain gauge voltages acquired access to the circuit, the bipolar signal is applied to a single supply the AD623 analog to digital converter, and single voltage input source, AD623 can remove the common mode voltage of the input useful signal and 100x magnification. 信号再通过ADO的模数转换,通过IIC 通信协议与单片机STC89C58RD通信,将采集的应变电压输入单片机,温度芯片DS18B20也通过单片机的一个I/O输入。 ADO signal through the analog-digital conversion, IIC communication protocol to communicate with the microcontroller via STC89C58RD, strain collected microcontroller input voltage, a temperature of the chip DS18B20 also through I / O input of the microcontroller.

[0031] 在单片机的一个端口还接有位于应变片应变位置的半导体温度传感器,用来实时监测该点温度的变化,其主要的是为了提供温度补偿的数据,进一步补充完善监测数据信息。 [0031] In a further port connected to the microcontroller semiconductor strain gage temperature sensor located position, for real-time monitoring the temperature variation of the point, the main data is to provide a temperature compensated, to further improve the monitoring supplementary data. [0032] 单片机读取存储在存储器内的标定表,结合采集到的应变电压,最后输出形变量。 Calibration Table [0032] The microcontroller reads stored in the memory, with strain collected voltage, deformation final output.

[0033] 前端采集模块宽范围供电、以及RS485通讯都是为了适应现场可能情况变化,12V 到5V的压降以及RS485的通讯距离都可适应远距离通信。 [0033] The wide front end power collection module, and RS485 communication is possible in order to adapt the scene changes, the pressure drop of 12V to 5V and can be adapted to the RS485 communication distance telecommunications.

[0034] 以上显示和描述了本实用新型的基本原理和主要特征和本实用新型的优点。 [0034] The above described and the basic principles of the present invention and the main features and advantages of the present invention. 本行业的技术人员应该了解,本实用新型不受上述实施例的限制,上述实施例和说明书中描述的只是说明本实用新型的原理,在不脱离本实用新型精神和范围的前提下,本实用新型还会有各种变化和改进,这些变化和改进都落入要求保护的本实用新型范围内。 The industry the art will appreciate, the present invention is not limited to the embodiments described above, the above embodiments described in the specification and Examples are merely illustrative of the principles of the present invention, without departing from the spirit and scope of the present invention, the present invention new there will be various changes and modifications, changes and modifications which fall within the scope of the invention claimed. 本实用新型要求保护范围由所附的权利要求书及其等效物界定。 Scope of the claimed invention by the appended claims and their equivalents.

Claims (4)

  1. 高智能电阻应变片式传感器,包括位于待测点的应变片桥式电路、单片机、模数转换器、存储器以及温度芯片,以上组件一体化封装在PCB板上,其特征在于,所述应变片桥式电路为两个应变片与两个标准电阻连接成的半桥式结构,其输出端通过模数转换器接入单片机的信号输入端,所述单片机连接有存储器以及温度芯片。 Intelligent resistance strain gauge type sensor comprising a strain gauge bridge circuit located at the point to be tested, the microcontroller analog to digital converter, a memory, and temperature of the chip, the integration of the above components packaged on a PCB, wherein said strain gauge two strain gauge bridge circuit with two resistors connected in a standard half-bridge configuration, whose output signal by the analog to digital converter input of the microcontroller to access, and the memory of the microcontroller is connected to the chip temperature.
  2. 2.根据权利要求1所述的高智能电阻应变片式传感器,其特征在于,所述单片机一端口的应变片应变位置安装半导体温度传感器。 The intelligent resistive strain gauge sensor according to claim 1, characterized in that a port of the microcontroller strain gauge mounting position of the semiconductor strain sensor temperature.
  3. 3.根据权利要求1所述的高智能电阻应变片式传感器,其特征在于,所述存储器为串行接口的电可写只读存储器。 The intelligent resistive strain gauge sensor according to claim 1, wherein said memory is a serial interface electrically writable read-only memory.
  4. 4.根据权利要求1所述的高智能电阻应变片式传感器,其特征在于,所述应变片桥式电路应变片的输入端连接有电子电位器。 The intelligent resistive strain gauge sensor according to claim 1, wherein said sheet input of the strain gage bridge circuit connected to the electronic potentiometer.
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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102169007A (en) * 2010-12-27 2011-08-31 苏州苏灵仪表有限公司 A digital sensing electronic price computing scale
CN102430661A (en) * 2011-08-18 2012-05-02 江苏科技大学 Model selecting device and method for feeding/boosting servo motor of pipe bender
CN102507051A (en) * 2011-11-24 2012-06-20 清华大学 Stress testing chip and stress testing method thereof
CN103743505A (en) * 2013-12-20 2014-04-23 广西科技大学 Acquisition method for automobile strain signal
CN104504877A (en) * 2014-12-05 2015-04-08 上海交通大学 Wireless measuring system for real-time torque of machine tool spindle
CN105067040A (en) * 2015-08-12 2015-11-18 吴江佳亿电子科技有限公司 Temperature and pressure integrated tester
CN105187064A (en) * 2015-10-30 2015-12-23 新港海岸(北京)科技有限公司 Self-correcting system based on graphene sensor
CN105222934A (en) * 2015-11-18 2016-01-06 沈阳建筑大学 A kind of external thermal insulation system temperature stress detection method and pick-up unit
CN105258630A (en) * 2015-11-26 2016-01-20 上海电气凯士比核电泵阀有限公司 Equipment for measuring high temperature deformation amount of workpiece and measurement method thereof
WO2017196993A1 (en) 2016-05-10 2017-11-16 Fike Corporation Intelligent temperature and pressure gauge assembly
CN104504877B (en) * 2014-12-05 2018-02-09 上海交通大学 A kind of real-time moment of torsion wireless measuring system of machine tool chief axis

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102169007A (en) * 2010-12-27 2011-08-31 苏州苏灵仪表有限公司 A digital sensing electronic price computing scale
CN102169007B (en) * 2010-12-27 2013-04-24 苏州苏灵仪表有限公司 A digital sensing electronic price computing scale
CN102430661A (en) * 2011-08-18 2012-05-02 江苏科技大学 Model selecting device and method for feeding/boosting servo motor of pipe bender
CN102507051A (en) * 2011-11-24 2012-06-20 清华大学 Stress testing chip and stress testing method thereof
CN103743505A (en) * 2013-12-20 2014-04-23 广西科技大学 Acquisition method for automobile strain signal
CN104504877B (en) * 2014-12-05 2018-02-09 上海交通大学 A kind of real-time moment of torsion wireless measuring system of machine tool chief axis
CN104504877A (en) * 2014-12-05 2015-04-08 上海交通大学 Wireless measuring system for real-time torque of machine tool spindle
CN105067040A (en) * 2015-08-12 2015-11-18 吴江佳亿电子科技有限公司 Temperature and pressure integrated tester
CN105187064A (en) * 2015-10-30 2015-12-23 新港海岸(北京)科技有限公司 Self-correcting system based on graphene sensor
CN105187064B (en) * 2015-10-30 2018-04-10 新港海岸(北京)科技有限公司 A kind of self correcting system based on graphene sensor
CN105222934A (en) * 2015-11-18 2016-01-06 沈阳建筑大学 A kind of external thermal insulation system temperature stress detection method and pick-up unit
CN105258630A (en) * 2015-11-26 2016-01-20 上海电气凯士比核电泵阀有限公司 Equipment for measuring high temperature deformation amount of workpiece and measurement method thereof
WO2017196993A1 (en) 2016-05-10 2017-11-16 Fike Corporation Intelligent temperature and pressure gauge assembly
US10352801B2 (en) 2016-05-10 2019-07-16 Fike Corporation Intelligent temperature and pressure gauge assembly

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