WO2022047774A1 - Test indentor and sensor - Google Patents

Test indentor and sensor Download PDF

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Publication number
WO2022047774A1
WO2022047774A1 PCT/CN2020/113721 CN2020113721W WO2022047774A1 WO 2022047774 A1 WO2022047774 A1 WO 2022047774A1 CN 2020113721 W CN2020113721 W CN 2020113721W WO 2022047774 A1 WO2022047774 A1 WO 2022047774A1
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sensor
force transmission
indenter
test
sleeve
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PCT/CN2020/113721
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French (fr)
Chinese (zh)
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孙昊辰
高辉
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全立传感科技(南京)有限公司
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Publication of WO2022047774A1 publication Critical patent/WO2022047774A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/02—Details
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D18/00—Testing or calibrating apparatus or arrangements provided for in groups G01D1/00 - G01D15/00
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0001—Type of application of the stress
    • G01N2203/0003—Steady
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0014—Type of force applied
    • G01N2203/0016—Tensile or compressive
    • G01N2203/0019—Compressive
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/0058—Kind of property studied
    • G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
    • G01N2203/0071—Creep
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
    • G01N2203/02—Details not specific for a particular testing method
    • G01N2203/06—Indicating or recording means; Sensing means
    • G01N2203/067—Parameter measured for estimating the property
    • G01N2203/0676—Force, weight, load, energy, speed or acceleration

Definitions

  • the purpose of the present invention is to provide a test indenter, which has accurate force transmission and can meet sensor detection requirements or work requirements at any position.
  • the force-transmitting portion of the indenter body has a first force-transmitting surface in contact with the force-applying body and a second force-transmitting surface in contact with the sensor.
  • first force transmission surface and the second force transmission surface are both spherical surfaces.
  • the force transmission part of the indenter body is a sphere, and the spherical radius of the first force transmission surface and the second force transmission surface are the same.
  • the spherical radii of the first force-transmitting surface and the second force-transmitting surface are different.
  • the force transmission portion of the indenter body also has a cylindrical surface for connecting the first force transmission surface and the second force transmission surface.
  • the test indenter of the present invention When testing the test indenter of the present invention, firstly screw the connection sleeve 2 of the test indenter into the connection hole 401 of the sensor 4, and then place the sensor equipped with the test indenter at the position for force measurement, so that the sensor The other end is fixed, the first force transmission surface 103 of the indenter body receives the test force, and the second force transmission surface 104 transmits the test force to the sensor.
  • the position of the force measurement can be in the vertical direction, that is, when the sensor equipped with the test indenter is placed vertically to test the horizontal force, the test indenter will not be separated from the sensor due to the action of gravity, so it can meet the test requirements of any position.
  • the relationship between the load and the error obtained from the first group of tests is shown in Figure 5.
  • the horizontal axis is the load, and the vertical axis is the error.
  • the hysteresis is -0.0590%FS; it can be seen from Figure 5 that most of the error bars fall outside the standard line of the allowable error range.
  • the stepped line in Figure 5 is the standard line of the allowable error range, and the maximum error is close to 0.1%.
  • the first The group sensor error is very large.
  • the heat treatment of high-strength alloy steel sensors is more stringent than that of aluminum alloy sensors, it has higher requirements for heat treatment control and equipment, so in general, the accuracy of aluminum alloy sensors is much better than that of high-strength alloy steel sensors; but the third The error of the group is greater than that of the second group, so it is verified that the test indenter of the present invention can greatly improve the accuracy of the sensor.
  • the connecting column of the indenter body is passed through the connection sleeve, the connection key is used to connect the indenter body and the connection sleeve, and then the test indenter is inserted into the connection hole of the sensor, which can solve the problem of the sensor testing process in the prior art.
  • the test steel ball in a non-horizontal position cannot accurately transmit the test force, or even the force may not be transmitted at all.
  • the force transmission is accurate and can meet the detection of sensors at any position; in addition, the test indenter of the present invention is easy to assemble and has a wide range of applications. .

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)

Abstract

A test indentor, comprising an indentor body (1), a connecting sleeve (2) used for connecting the indentor body (1) to a sensor (4), and a connecting key (3) used for fixing the connecting sleeve (2) and the indentor body (1). The indentor body (1) comprises a force transmission portion (101) used for transmitting test pressure and a connecting column (102) penetrating into the connecting sleeve (2), a keyseat (201) used for placing the connecting key (3) is formed in an end portion of the connecting sleeve (2), the connecting column (102) of the indentor body (1) penetrates through the connecting sleeve (2), and an end surface of the connecting column (102) is fixedly connected to the connecting key (3) located in the keyseat (201). The connecting column (102) of the indentor body (1) penetrates through the connecting sleeve (2), the indentor body (1) and the connecting sleeve (2) are connected by using the connecting key (3), and then the test indentor (1) is mounted in a connecting hole (401) of the sensor (4), so that the problem in the prior art that a test steel ball at a non-horizontal position cannot accurately transmit test force during a sensor testing process can be solved, force transmission is accurate, and the sensor detection requirements at any position can be satisfied.

Description

测试压头及传感器Test head and sensor 技术领域technical field
本发明涉及检测工具，尤其涉及一种测试压头。The present invention relates to testing tools, in particular to a testing indenter.
背景技术Background technique
一般传感器在正常工作前，均需要进行测试或标定，同时检测其例如线性度、滞后误差和蠕变等性能，测试时经常采用钢球进行力的传导，做法是将传感器水平置于力测试机中，将钢球放在传感器的上表面上，通过钢球将力加载或减载到传感器，可测量平行于重力方向的力作用于传感器上时传感器的性能。但实际应用时，传感器可能需要测量非重力方向的力，例如测量水平方向的力时，因为必须将传感器与力的方向垂直放置，故传感器不能再水平放置，而是需要竖直放置。如仍然采用钢球进行检测的话，钢球此时受自身重力作用会向下掉落从而脱离传感器；如此钢球则无法再将力加载或减载传递至传感器，传感器也就不能正常工作。为了解决非重力方向传感器无法正常工作的问题，现有的解决方案是将传统压头设计为一体式结构或者固连为整体结构后通过螺纹拧入传感器，如此在测试或工作过程中螺纹会参与传力，如此则会影响传感器的性能，增大传感器的误差，从而影响传感器的精度。Generally, the sensor needs to be tested or calibrated before it works normally, and its properties such as linearity, hysteresis error and creep are tested at the same time. Steel balls are often used for force transmission during testing. The method is to place the sensor horizontally on the force testing machine. , the performance of the sensor when a force parallel to the direction of gravity acts on the sensor can be measured by placing a steel ball on the upper surface of the sensor, and loading or unloading the force to the sensor through the steel ball. However, in practical applications, the sensor may need to measure the force in the non-gravity direction. For example, when measuring the force in the horizontal direction, because the sensor must be placed perpendicular to the direction of the force, the sensor can no longer be placed horizontally, but needs to be placed vertically. If the steel ball is still used for detection, the steel ball will fall down under the action of its own gravity and leave the sensor; in this way, the steel ball can no longer transmit force loading or load shedding to the sensor, and the sensor will not work normally. In order to solve the problem that the non-gravity direction sensor cannot work normally, the existing solution is to design the traditional indenter as an integrated structure or fix it into an integral structure and then screw the sensor into the sensor through the thread, so that the thread will participate in the test or work process. This will affect the performance of the sensor, increase the error of the sensor, and thus affect the accuracy of the sensor.
因此，亟待解决上述问题。Therefore, there is an urgent need to solve the above problems.
发明内容SUMMARY OF THE INVENTION
发明目的：本发明的目的是提供一种测试压头，该测试压头传力准确且可满足任意位置的传感器检测需求或工作需求。Purpose of the invention: The purpose of the present invention is to provide a test indenter, which has accurate force transmission and can meet sensor detection requirements or work requirements at any position.
技术方案：为实现以上目的，本发明公开了一种测试压头，包括压头本体、用于将压头本体连接于传感器上的连接套以及用于固定连接套和压头本体的连接键，所述压头本体包括用于传递测试压力的传力部和穿入连接套的连接柱，所述连接套的端部开设有用于放置连接键的键槽，压头本体的连接柱穿过连接套，连接柱的端面与位于键槽内的连接键固定连接。Technical solution: In order to achieve the above purpose, the present invention discloses a test indenter, which includes an indenter body, a connection sleeve for connecting the indenter body to the sensor, and a connection key for fixing the connection sleeve and the indenter body, The indenter body includes a force transmission portion for transmitting the test pressure and a connecting column penetrating the connecting sleeve, the end of the connecting sleeve is provided with a keyway for placing the connecting key, and the connecting column of the indenting body passes through the connecting sleeve. , the end face of the connecting column is fixedly connected with the connecting key located in the keyway.
其中，所述连接套为具有外螺纹的螺纹套，该螺纹套的外螺纹与传感器相适配。Wherein, the connecting sleeve is a threaded sleeve with an external thread, and the external thread of the threaded sleeve is adapted to the sensor.
优选的，所述压头本体的传力部具有施力体相接触的第一传力面和与传感器相接触的第二传力面。Preferably, the force-transmitting portion of the indenter body has a first force-transmitting surface in contact with the force-applying body and a second force-transmitting surface in contact with the sensor.
再者，所述第一传力面和第二传力面均为球面。Furthermore, the first force transmission surface and the second force transmission surface are both spherical surfaces.
优选的，所述压头本体的传力部为一球体，所述第一传力面和第二传力面的球面半径相同。Preferably, the force transmission part of the indenter body is a sphere, and the spherical radius of the first force transmission surface and the second force transmission surface are the same.
进一步，所述第一传力面和第二传力面的球面半径不同。Further, the spherical radii of the first force-transmitting surface and the second force-transmitting surface are different.
再者，所述压头本体的传力部还具有用于连接第一传力面和第二传力面的圆柱面。Furthermore, the force transmission portion of the indenter body also has a cylindrical surface for connecting the first force transmission surface and the second force transmission surface.
进一步，所述压头本体的传力部与连接柱的连接处到连接套端面的距离L小于连接键的厚度。Further, the distance L from the connection between the force transmission portion of the indenter body and the connection column and the end face of the connection sleeve is smaller than the thickness of the connection key.
优选的，所述压头本体的连接柱与连接套之间为间隙配合。Preferably, there is clearance fit between the connecting column of the indenter body and the connecting sleeve.
本发明一种采用测试压头进行检测的传感器，所述传感器具有与连接套相适配的连接孔。The present invention is a sensor for detection by using a test pressure head, and the sensor has a connection hole matched with a connection sleeve.
有益效果：与现有技术相比，本发明具有以下显著优点：本发明将压头本体的连接柱穿过连接套，并利用连接键将压头本体和连接套相连接，再将测试压头装入传感器的连接孔内可解决现有技术中当传感器工作过程中处于非水平位置测试钢球无法传递测试力的问题，传力准确且可满足任意位置的传感器工作需求；此外本发明的测试压头拆装便捷，适用范围广。Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: the present invention passes the connecting column of the indenter body through the connection sleeve, and uses the connecting key to connect the indenter body and the connection sleeve, and then the test indenter is connected. Putting it into the connection hole of the sensor can solve the problem that the test steel ball cannot transmit the test force when the sensor is in a non-horizontal position during the working process of the sensor, and the force transmission is accurate and can meet the working requirements of the sensor in any position; in addition, the test of the present invention The indenter is easy to disassemble and assemble, and has a wide range of applications.
附图说明Description of drawings
图1为本发明的结构示意图；Fig. 1 is the structural representation of the present invention;
图2为本发明的剖面示意图；2 is a schematic cross-sectional view of the present invention;
图3为本发明中装入测试压头的传感器的结构示意图；Fig. 3 is the structural schematic diagram of the sensor loaded with the test pressure head in the present invention;
图4为本发明中装入测试压头的传感器的剖面示意图；Fig. 4 is the cross-sectional schematic diagram of the sensor loaded with the test pressure head in the present invention;
图5为本发明中平行试验第1组的试验结果示意图；5 is a schematic diagram of the test results of the first group of parallel tests in the present invention;
图6为本发明中平行试验第2组的试验结果示意图；6 is a schematic diagram of the test results of the second group of parallel tests in the present invention;
图7为本发明中平行试验第3组的试验结果示意图。FIG. 7 is a schematic diagram of the test results of the third group of parallel tests in the present invention.
具体实施方式detailed description
下面结合附图对本发明的技术方案作进一步说明。The technical solutions of the present invention will be further described below with reference to the accompanying drawings.
实施例1Example 1
如图1、图2、图3和图4所示，本发明一种测试压头，包括压头本体1、连接套2和连接键3，压头本体1包括传力部101和连接柱102。As shown in FIGS. 1 , 2 , 3 and 4 , a test indenter of the present invention includes an indenter body 1 , a connection sleeve 2 and a connection key 3 , and the indenter body 1 includes a force transmission portion 101 and a connection column 102 .
传感器4具有与连接套2相适配的连接孔401，连接孔401具有内螺纹，连接套2为具有外螺纹的螺纹套，该螺纹套的外螺纹与传感器4的连接孔401的内螺纹相适配， 连接套2可拧入传感器4的连接孔401内。连接套2上还开设有便于压头本体1的连接柱102穿过的光孔202，压头本体1的连接柱102与连接套2光孔之间为间隙配合；连接套2的端部开设有用于放置连接键3的键槽201。本发明的压头本体1的连接柱102与连接套2光孔之间为间隙配合，本发明利用间隙配合的微弱活动空间，避免压头本体和连接套固连形成一体，便于传感器检测标定过程中传感器误差的减小，有效提高传感器精度。The sensor 4 has a connection hole 401 which is matched with the connection sleeve 2 , the connection hole 401 has an inner thread, and the connection sleeve 2 is a threaded sleeve with an outer thread, and the outer thread of the threaded sleeve is the same as the inner thread of the connection hole 401 of the sensor 4 . For adaptation, the connecting sleeve 2 can be screwed into the connecting hole 401 of the sensor 4 . The connecting sleeve 2 is also provided with an optical hole 202 which is convenient for the connecting post 102 of the indenter body 1 to pass through. There is a keyway 201 for placing the connecting key 3 . The connection post 102 of the indenter body 1 of the present invention and the light hole of the connection sleeve 2 are clearance fit, and the present invention utilizes the weak movable space of the clearance fit to avoid the indenter body and the connection sleeve being fixedly connected to form an integral body, which is convenient for the sensor detection and calibration process The sensor error is reduced, and the sensor accuracy is effectively improved.
压头本体1的连接柱102穿过连接套2的光孔202，连接柱102的端面与位于键槽内的连接键3通过螺钉5固定连接，且压头本体1的传力部101与连接柱102的连接处到连接套2端面的距离L小于连接键3的厚度。本发明中如果距离L大于连接键3的厚度，连接键3在某些位置时可能从键槽201中脱出，从而造成压头本体1的空转，而使测试压头整体无法从传感器4中拧出。The connection post 102 of the indenter body 1 passes through the light hole 202 of the connection sleeve 2, the end face of the connection post 102 is fixedly connected with the connection key 3 located in the keyway by the screw 5, and the force transmission part 101 of the indenter body 1 is connected to the connection post The distance L from the connection point of 102 to the end face of the connection sleeve 2 is smaller than the thickness of the connection key 3 . In the present invention, if the distance L is greater than the thickness of the connecting key 3, the connecting key 3 may come out of the keyway 201 at certain positions, thereby causing the idling of the indenter body 1, so that the entire test indenter cannot be unscrewed from the sensor 4. .
本发明中压头本体1的传力部101为一球体，传力部101具有施力体相接触的第一传力面103和与传感器4相接触的第二传力面104，即第一传力面103和第二传力面104均为球面，且球面半径相同。本申请的球面设计使得球心始终指向一处，满足传感器转动角度对传感器影响很小的要求。In the present invention, the force transmission portion 101 of the indenter body 1 is a sphere, and the force transmission portion 101 has a first force transmission surface 103 in contact with the force applying body and a second force transmission surface 104 in contact with the sensor 4, namely the first force transmission surface 104. Both the force transmission surface 103 and the second force transmission surface 104 are spherical surfaces, and the spherical surfaces have the same radius. The spherical design of the present application makes the center of the sphere always point to one place, which meets the requirement that the rotation angle of the sensor has little influence on the sensor.
本发明的测试压头在测试时，首先将测试压头的连接套2拧入传感器4的连接孔401内，然后将装配有测试压头的传感器放到用于测力的位置，使得传感器的另一端固定，压头本体的第一传力面103接受测试的力，第二传力面104将测试力传递给传感器。测力的位置可以是竖直方向，即当装配有测试压头的传感器竖直放置测试水平力时，测试压头不会因为重力作用脱离传感器，因此可满足任何位置的测试要求。When testing the test indenter of the present invention, firstly screw the connection sleeve 2 of the test indenter into the connection hole 401 of the sensor 4, and then place the sensor equipped with the test indenter at the position for force measurement, so that the sensor The other end is fixed, the first force transmission surface 103 of the indenter body receives the test force, and the second force transmission surface 104 transmits the test force to the sensor. The position of the force measurement can be in the vertical direction, that is, when the sensor equipped with the test indenter is placed vertically to test the horizontal force, the test indenter will not be separated from the sensor due to the action of gravity, so it can meet the test requirements of any position.
设计3组平行试验，第1组为装有传统压头的高强度合金钢传感器，其中传统压头的传力面为非球面，压头本体与连接套两者固连为一体，高强度合金钢传感器为高强度合金钢轮辐式传感器；第2组为装有实施例1的高强度合金钢传感器，高强度合金钢传感器为高强度合金钢轮辐式传感器；第3组为装有传统压头的铝合金传感器，其中传统压头的传力面为非球面，压头本体与连接套两者固连为一体，铝合金传感器为铝合金轮辐式传感器。Three groups of parallel tests are designed. The first group is a high-strength alloy steel sensor equipped with a traditional indenter. The force-transmitting surface of the traditional indenter is aspherical. The steel sensor is a high-strength alloy steel spoke-type sensor; the second group is equipped with the high-strength alloy steel sensor of Example 1, and the high-strength alloy steel sensor is a high-strength alloy steel spoke-type sensor; the third group is equipped with a traditional indenter The aluminum alloy sensor of the traditional indenter is an aspherical surface, the indenter body and the connecting sleeve are fixedly connected as a whole, and the aluminum alloy sensor is an aluminum alloy wheel-spoke sensor.
第1组试验得到的载荷和误差之间的关系如附图5所示，横轴为载荷，纵轴为误差，第1组试验得到的传感器线性为0.0987％FS，重复性为0.0050％FS，迟滞为-0.0590％FS；从图5可以看出大部分误差线都落到允许误差范围标准线之外，图5中阶梯线为允许误 差范围的标准线，最大误差达到接近0.1％，第1组传感器误差很大。The relationship between the load and the error obtained from the first group of tests is shown in Figure 5. The horizontal axis is the load, and the vertical axis is the error. The hysteresis is -0.0590%FS; it can be seen from Figure 5 that most of the error bars fall outside the standard line of the allowable error range. The stepped line in Figure 5 is the standard line of the allowable error range, and the maximum error is close to 0.1%. The first The group sensor error is very large.
参照JJG 144-2007《标准测力仪检定规程》试验第2组得到的载荷和误差之间的关系如附图6所示，横轴为载荷，纵轴为误差，第2组试验得到的传感器线性为0.0123％FS，重复性为0.004％FS，迟滞为0.0080％FS；从图6可看到第2组的误差线均落在允许误差范围标准线之间，图6中阶梯线为允许误差范围的标准线，最大误差为0.012％，满足国家标准要求。Referring to JJG 144-2007 "Standard Dynamometer Verification Regulations", the relationship between the load and the error obtained in the second group of tests is shown in Figure 6, the horizontal axis is the load, the vertical axis is the error, the sensor obtained in the second group of tests The linearity is 0.0123%FS, the repeatability is 0.004%FS, and the hysteresis is 0.0080%FS; it can be seen from Figure 6 that the error bars of the second group fall between the standard lines of the allowable error range, and the step line in Figure 6 is the allowable error The standard line of the range, the maximum error is 0.012%, which meets the national standard requirements.
参照JJG 391-2009《力传感器检定规程》试验第3组得到的载荷和误差之间的关系如附图7所示，横轴为载荷，纵轴为误差，第3组试验得到的传感器线性为0.0303％FS，重复性为0.004％FS，迟滞为-0.0223％FS；从图7可看到第3组的误差线有部分落在允许误差范围标准线之外，如载荷1000v-1500v段，图7中阶梯线为允许误差范围的标准线，最大误差达到0.03％。高强度合金钢传感器因为材料的热处理相比铝合金传感器要求严苛，对热处理控制和设备要求更高，所以通常情况下，铝合金传感器的精度会大大好于高强度合金钢传感器；但第3组的误差大于第2组的误差，因此验证了本发明的测试压头可大大提高传感器的精度。Referring to JJG 391-2009 "Force Sensor Verification Regulations", the relationship between the load and the error obtained in the third group of tests is shown in Figure 7. The horizontal axis is the load, and the vertical axis is the error. The linearity of the sensor obtained in the third group of tests is 0.0303%FS, repeatability is 0.004%FS, hysteresis is -0.0223%FS; it can be seen from Figure 7 that the error bars of the third group are partially outside the standard line of the allowable error range, such as the load 1000v-1500v segment, Figure 7 The step line in 7 is the standard line of the allowable error range, and the maximum error reaches 0.03%. Because the heat treatment of high-strength alloy steel sensors is more stringent than that of aluminum alloy sensors, it has higher requirements for heat treatment control and equipment, so in general, the accuracy of aluminum alloy sensors is much better than that of high-strength alloy steel sensors; but the third The error of the group is greater than that of the second group, so it is verified that the test indenter of the present invention can greatly improve the accuracy of the sensor.
实施例2Example 2
实施例2的结构与实施例1的结构相同，区别之处在于：实施例2中压头本体1的传力部101为异型球体，传力部101具有施力体相接触的第一传力面103和与传感器4相接触的第二传力面104，即第一传力面103和第二传力面104均为球面，且球面半径不同。The structure of Example 2 is the same as that of Example 1, the difference is that: in Example 2, the force transmission part 101 of the indenter body 1 is a special-shaped sphere, and the force transmission part 101 has a first force transmission part that is in contact with the force applying body. The surface 103 and the second force transmission surface 104 in contact with the sensor 4, that is, the first force transmission surface 103 and the second force transmission surface 104 are both spherical surfaces, and the spherical surfaces have different radii.
实施例3Example 3
实施例3的结构与实施例1的结构相同，区别之处在于：实施例3中传力部101具有施力体相接触的第一传力面103、与传感器4相接触的第二传力面104和用于连接第一传力面和第二传力面的圆柱面105，第一传力面103和第二传力面104均为球面，且球面半径相同。The structure of Embodiment 3 is the same as that of Embodiment 1, except that the force transmission portion 101 in Embodiment 3 has a first force transmission surface 103 in contact with the force applying body, and a second force transmission surface 103 in contact with the sensor 4 The surface 104 and the cylindrical surface 105 for connecting the first force transmission surface and the second force transmission surface, the first force transmission surface 103 and the second force transmission surface 104 are both spherical surfaces, and the spherical surfaces have the same radius.
实施例4Example 4
实施例4的结构与实施例1的结构相同，区别之处在于：实施例4中传力部101具有施力体相接触的第一传力面103、与传感器4相接触的第二传力面104和用于连接第一传力面和第二传力面的圆锥面，第一传力面103和第二传力面104均为球面，且球面半径不同。The structure of Example 4 is the same as that of Example 1, except that the force transmission portion 101 in Example 4 has a first force transmission surface 103 in contact with the force applying body, and a second force transmission surface 103 in contact with the sensor 4 The surface 104 and the conical surface for connecting the first force transmission surface and the second force transmission surface, the first force transmission surface 103 and the second force transmission surface 104 are both spherical surfaces, and the spherical surfaces have different radii.
本发明将压头本体的连接柱穿过连接套，并利用连接键将压头本体和连接套相连接，再将测试压头装入传感器的连接孔内可解决现有技术中当传感器测试过程中处于非水平位置测试钢球无法准确传递测试力的问题，甚至可能根本无法传递力等问题，传力准确且可满足任意位置的传感器检测；此外本发明的测试压头组装便捷，适用范围广。In the present invention, the connecting column of the indenter body is passed through the connection sleeve, the connection key is used to connect the indenter body and the connection sleeve, and then the test indenter is inserted into the connection hole of the sensor, which can solve the problem of the sensor testing process in the prior art. The test steel ball in a non-horizontal position cannot accurately transmit the test force, or even the force may not be transmitted at all. The force transmission is accurate and can meet the detection of sensors at any position; in addition, the test indenter of the present invention is easy to assemble and has a wide range of applications. .

Claims (10)

  1. 一种测试压头，其特征在于：包括压头本体(1)、用于将压头本体连接于传感器(4)上的连接套(2)以及用于固定连接套和压头本体的连接键(3)，所述压头本体(1)包括用于传递测试压力的传力部(101)和穿入连接套的连接柱(102)，所述连接套(2)的端部开设有用于放置连接键的键槽(201)，压头本体(1)的连接柱(102)穿过连接套(2)，连接柱(102)的端面与位于键槽内的连接键(3)固定连接。A test indenter, characterized in that it comprises an indenter body (1), a connection sleeve (2) for connecting the indenter body to a sensor (4), and a connection key for fixing the connection sleeve and the indenter body (3), the indenter body (1) includes a force transmission portion (101) for transmitting the test pressure and a connecting column (102) penetrating the connecting sleeve, the end of the connecting sleeve (2) is provided with a The keyway (201) of the connecting key is placed, the connecting column (102) of the indenter body (1) passes through the connecting sleeve (2), and the end face of the connecting column (102) is fixedly connected with the connecting key (3) located in the keyway.
  2. 根据权利要求1所述的测试压头，其特征在于：所述连接套(2)为具有外螺纹的螺纹套，该螺纹套的外螺纹与传感器(4)相适配。The test indenter according to claim 1, characterized in that: the connecting sleeve (2) is a threaded sleeve with an external thread, and the external thread of the threaded sleeve is adapted to the sensor (4).
  3. 根据权利要求1所述的测试压头，其特征在于：所述压头本体(1)的传力部(101)具有施力体相接触的第一传力面(103)和与传感器相接触的第二传力面(104)。The test indenter according to claim 1, characterized in that: the force transmission part (101) of the indenter body (1) has a first force transmission surface (103) in contact with the force application body and in contact with the sensor The second force transmission surface (104).
  4. 根据权利要求3所述的测试压头，其特征在于：所述第一传力面(103)和第二传力面(104)均为球面。The test indenter according to claim 3, wherein the first force transmission surface (103) and the second force transmission surface (104) are both spherical surfaces.
  5. 根据权利要求4所述的测试压头，其特征在于：所述压头本体(1)的传力部(101)为一球体，所述第一传力面(103)和第二传力面(104)的球面半径相同。The test indenter according to claim 4, characterized in that: the force transmission part (101) of the indenter body (1) is a sphere, the first force transmission surface (103) and the second force transmission surface The spherical radius of (104) is the same.
  6. 根据权利要求4所述的测试压头，其特征在于：所述第一传力面(103)和第二传力面(104)的球面半径不同。The test indenter according to claim 4, characterized in that the spherical radii of the first force transmission surface (103) and the second force transmission surface (104) are different.
  7. 根据权利要求3所述的测试压头，其特征在于：所述压头本体(1)的传力部(101)还具有用于连接第一传力面和第二传力面的圆柱面(105)。The test indenter according to claim 3, characterized in that: the force transmission portion (101) of the indenter body (1) further has a cylindrical surface (101) for connecting the first force transmission surface and the second force transmission surface. 105).
  8. 根据权利要求1所述的测试压头，其特征在于：所述压头本体(1)的传力部(101)与连接柱(102)的连接处到连接套(2)端面的距离L小于连接键(3)的厚度。The test indenter according to claim 1, characterized in that: the distance L from the connection between the force transmitting portion (101) of the indenter body (1) and the connecting column (102) to the end face of the connecting sleeve (2) is less than Thickness of the connecting key (3).
  9. 根据权利要求1所述的测试压头，其特征在于：所述压头本体(1)的连接柱(102)与连接套(2)之间为间隙配合。The test indenter according to claim 1, characterized in that the connection post (102) of the indenter body (1) and the connection sleeve (2) are in clearance fit.
  10. 一种采用权利要求1至9任一所述的测试压头进行检测的传感器，其特征在于：所述传感器(4)具有与连接套相适配的连接孔(401)。A sensor for detection using the test indenter according to any one of claims 1 to 9, characterized in that: the sensor (4) has a connection hole (401) adapted to a connection sleeve.
PCT/CN2020/113721 2020-09-04 2020-09-07 Test indentor and sensor WO2022047774A1 (en)

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