CN105067166A - Sleeve type force transducer for support structures - Google Patents
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Abstract
一种用于支架结构的套筒式测力传感器，弹性元件与保护外壳为套筒式结构，弹性元件嵌套在保护外壳内，并通过第一侧方紧固螺钉、第二侧方紧固螺钉、第三侧方紧固螺钉、第四侧方紧固螺钉沿弹性元件与保护外壳的周向对称紧固连接；弹性元件的材质为合金结构钢40CrNiMoA。第一电阻应变片和第二电阻应变片通过胶水对称粘贴在弹性元件的表面，用于感知弹性元件的变形，并可有效消除弯矩的影响。固定接头通过螺纹配合与保护外壳的外表面连接固定。该传感器结合无线传感器网络技术，将其分散布置在支架结构现场，可实现对支架结构立杆的受力进行监测，具有极大的应用价值和潜力。
A sleeve-type load cell used in a bracket structure, the elastic element and the protective shell are a sleeve-type structure, the elastic element is nested in the protective shell, and is fastened by the first side fastening screw and the second side The screw, the third lateral fastening screw and the fourth lateral fastening screw are symmetrically fastened and connected along the circumferential direction of the elastic element and the protective shell; the elastic element is made of alloy structural steel 40CrNiMoA. The first resistance strain gauge and the second resistance strain gauge are symmetrically pasted on the surface of the elastic element by glue to sense the deformation of the elastic element and effectively eliminate the influence of bending moment. The fixed joint is connected and fixed with the outer surface of the protective shell through thread fit. Combined with wireless sensor network technology, the sensor is scattered on the site of the support structure, which can monitor the force of the support structure pole, and has great application value and potential.
Description
技术领域technical field
本发明涉及一种用于支架结构的套筒式测力传感器，属于传感技术领域，可实现对支架结构立杆的压力进行监测。The invention relates to a sleeve-type load cell used for a support structure, which belongs to the field of sensor technology and can monitor the pressure of a vertical pole of a support structure.
背景技术Background technique
随着经济的快速发展，道路桥梁建设发展迅速。现浇箱梁施工方法作为道路桥梁施工中一种常见的施工方法，在实际工程中得到广泛应用。现浇箱梁施工方法具有节约模板支架，降低劳动强度，同时也缩短了工期，加快了施工速度等优点。支架结构属于道路桥梁施工工程临时性搭建结构，具有拆装灵活、搬运方便，维护简单等特点，毫无疑问，在现浇混凝土连续箱梁施工过程中，大面积高层支架结构在保证施工进度和解决施工难题方面，发挥了不可替代的作用。With the rapid development of the economy, the construction of roads and bridges has developed rapidly. As a common construction method in road and bridge construction, the construction method of cast-in-place box girder has been widely used in practical engineering. The construction method of cast-in-place box girder has the advantages of saving formwork supports, reducing labor intensity, shortening the construction period, and speeding up the construction speed. The support structure belongs to the temporary construction structure of road and bridge construction projects. It has the characteristics of flexible disassembly and assembly, convenient transportation, and simple maintenance. There is no doubt that during the construction process of cast-in-place concrete continuous box girders, the large-area high-rise support structure plays an important role in ensuring the construction progress and It played an irreplaceable role in solving construction problems.
施工支架虽然是临时结构，但同时也是支架现浇法施工中的主要支撑结构，支架的强度、刚度、稳定性及变形直接影响到桥梁的质量及安全性。长期以来，支架的设计并没有引起人们的重视，大多数情况下是根据施工人员的经验来搭设。正是由于支架具有搭设方式多样、不确定因素众多、承受荷载较大、计算理论尚不完善等特点，建筑施工事故中约有四分之一与支架的失效有关，给国家和人民生命财产造成很大损失。Although the construction support is a temporary structure, it is also the main support structure in the construction of the support cast-in-place method. The strength, stiffness, stability and deformation of the support directly affect the quality and safety of the bridge. For a long time, the design of the support has not attracted people's attention, and in most cases it is erected according to the experience of the construction personnel. It is precisely because the support has the characteristics of various erection methods, many uncertain factors, large load, and incomplete calculation theory, etc., about a quarter of construction accidents are related to the failure of the support, causing serious damage to the country and people's life and property. Big loss.
伴随着支架结构应用的快速发展，由于支架结构失稳造成的坍塌事故也成逐年上升趋势。近些年，一些地区多次发生桥梁施工中支架、模板支撑架倒塌等重大工程事故，造成了惨痛的伤亡和财产的巨大损失。With the rapid development of the application of support structures, the collapse accidents caused by the instability of support structures have also become an increasing trend year by year. In recent years, major engineering accidents such as the collapse of brackets and formwork support frames during bridge construction have occurred many times in some areas, causing painful casualties and huge property losses.
质量是工程的生命，在役试验监测是工程质量管理的重要手段。加强路桥等施工过程中支架结构的质量监测，充分发挥其在施工安全和质量控制、评价中的重要作用，已成为路桥工程质量安全综合监理的重要内容。目前国内对支架结构的施工监理、在役监测、检测手段极为有限，多靠经纬仪、卷尺、扭力扳手和角尺等传统量测工具进行抽检，往往难以满足工程实际快速、全面、实时的检测要求。为了进一步保障路桥工程施工人员的人身安全，提高路桥工程的施工质量，本发明根据桥梁工程中支架监测的需求，设计了一种专用于支架结构的套筒式测力传感器，监测支架结构立杆的受力状况。Quality is the life of a project, and in-service test monitoring is an important means of project quality management. Strengthening the quality monitoring of support structures in the construction process of roads and bridges, and giving full play to their important role in construction safety and quality control and evaluation, has become an important content of comprehensive quality and safety supervision of road and bridge projects. At present, the construction supervision, in-service monitoring and detection methods of support structures in China are extremely limited, and traditional measurement tools such as theodolite, tape measure, torque wrench and angle square are mostly used for random inspection, which is often difficult to meet the actual rapid, comprehensive and real-time detection requirements of the project. In order to further protect the personal safety of the road and bridge construction workers and improve the construction quality of the road and bridge project, the present invention designs a sleeve-type load cell specially used for the support structure according to the needs of the support monitoring in the bridge project, and monitors the vertical pole of the support structure stress status.
测力传感器的工作原理主要有电阻应变式、差动变压式、电容式、压磁式、压电式和振弦式等。其中，电阻应变式测力传感器是目前应用较广的一类传感器，以其测量范围广、性能稳定、频率响应特性好等优点而备受各行业的青睐。电阻应变式测力传感器主要基于这样的原理：弹性体(弹性元件)在外力作用在产生弹性变形，使粘贴在表面的电阻应变片(转换元件)也随同产生变形，电阻应变片变形后，它的阻值将发生变化，再经相应的测量电路(惠更斯电桥)把这一电阻变化转换为电信号(电压或电流)，从而完成将外力变换为电信号的过程。目前，利用电阻应变式原理并针对支架结构的特殊结构而专门设计的套筒式测力传感器还鲜见报导。The working principle of the force sensor mainly includes resistance strain type, differential transformer type, capacitive type, piezomagnetic type, piezoelectric type and vibrating wire type. Among them, the resistance strain type load cell is a type of sensor that is widely used at present, and is favored by various industries for its advantages such as wide measurement range, stable performance, and good frequency response characteristics. The resistance strain type load cell is mainly based on the principle that the elastic body (elastic element) produces elastic deformation under the action of external force, so that the resistance strain gauge (conversion element) pasted on the surface is also deformed. After the resistance strain gauge is deformed, it The resistance value will change, and then the corresponding measurement circuit (Huygens bridge) will convert this resistance change into an electrical signal (voltage or current), thus completing the process of converting external force into an electrical signal. At present, there are few reports on the sleeve-type load cell specially designed for the special structure of the bracket structure by using the principle of resistance strain type.
发明内容Contents of the invention
本发明旨在设计一种用于支架结构的套筒式测力传感器，利用这种电阻应变式传感器实现对支架结构立杆的受力监测，分析支架结构的稳定性，保证桥梁施工安全顺利进行。The present invention aims to design a sleeve-type force measuring sensor for the support structure, and use this resistance strain sensor to realize the force monitoring of the vertical pole of the support structure, analyze the stability of the support structure, and ensure the safe and smooth progress of bridge construction .
为了实现上述目的，本发明采用如下设计方案：In order to achieve the above object, the present invention adopts the following design scheme:
一种用于支架结构的套筒式测力传感器，包括弹性元件1、第一电阻应变片2、第二电阻应变片6、第一侧方紧固螺钉3、第二侧方紧固螺钉5、第三侧方紧固螺钉7、第四侧方紧固螺钉8、保护外壳4、固定接头9；弹性元件1与保护外壳4为套筒式结构，弹性元件1嵌套在保护外壳4内，并通过第一侧方紧固螺钉3、第二侧方紧固螺钉5、第三侧方紧固螺钉7、第四侧方紧固螺钉8沿弹性元件1与保护外壳4的周向对称紧固连接；A sleeve-type load cell for a stent structure, comprising an elastic element 1, a first strain gauge 2, a second strain gauge 6, a first lateral fastening screw 3, and a second lateral fastening screw 5 , the third side fastening screw 7, the fourth side fastening screw 8, the protective shell 4, the fixed joint 9; the elastic element 1 and the protective shell 4 are sleeve-type structures, and the elastic element 1 is nested in the protective shell 4 , and through the first lateral fastening screw 3, the second lateral fastening screw 5, the third lateral fastening screw 7, and the fourth lateral fastening screw 8, they are symmetrical along the circumferential direction of the elastic element 1 and the protective shell 4 Fasten the connection;
所述弹性元件1的材质为合金结构钢40CrNiMoA，该材料具有较高的抗拉强度和屈服强度，并且可以监测支架结构立杆的受力。The material of the elastic element 1 is alloy structural steel 40CrNiMoA, which has high tensile strength and yield strength, and can monitor the force of the vertical rod of the support structure.
第一电阻应变片2和第二电阻应变片6通过胶水对称粘贴在弹性元件1的表面，用于感知弹性元件1的变形，并可有效消除弯矩的影响。The first resistance strain gauge 2 and the second resistance strain gauge 6 are symmetrically pasted on the surface of the elastic element 1 by glue, so as to sense the deformation of the elastic element 1 and effectively eliminate the influence of bending moment.
固定接头9通过螺纹配合与保护外壳4的外表面连接固定，可有效地保护从第一电阻应变片2和第二电阻应变片6引出的导线。The fixed joint 9 is connected and fixed to the outer surface of the protective shell 4 through screw fit, which can effectively protect the wires drawn from the first strain gauge 2 and the second strain gauge 6 .
本发明可以获得如下有益效果：The present invention can obtain following beneficial effect:
1、使用高阻值的电阻应变片2和电阻应变片6，可降低传感器的功耗；两电阻应变片对称粘贴在弹性元件1的表面，可互为补偿，消除弯矩的影响。1. Using high-resistance strain gauges 2 and 6 can reduce the power consumption of the sensor; the two strain gauges are symmetrically pasted on the surface of the elastic element 1 to compensate each other and eliminate the influence of bending moment.
2、弹性元件1采用高强度的合金结构钢，可缩小传感器尺寸，保护外壳4采用铝合金材质，可降低传感器的重量，传感器具有便携、易安装等优点。2. The elastic element 1 is made of high-strength alloy structural steel, which can reduce the size of the sensor. The protective shell 4 is made of aluminum alloy, which can reduce the weight of the sensor. The sensor has the advantages of portability and easy installation.
3、可以实现对门式钢管脚手架和碗扣式钢管脚手架两种规格的支架结构立杆受力进行监测，对两种规格的支架结构立杆具有通用性。3. It can realize the monitoring of the force of the two specifications of the support structure poles of the portal steel pipe scaffolding and the bowl buckle steel pipe scaffolding, and has versatility for the support structure poles of the two specifications.
附图说明Description of drawings
图1用于支架结构的套筒式测力传感器的整体示意图；Fig. 1 is used for the overall schematic diagram of the sleeve type load cell of support structure;
图2用于支架结构的套筒式测力传感器的弹性元件图；Fig. 2 is used for the elastic element diagram of the sleeve type load cell of support structure;
图3用于支架结构的套筒式测力传感器的保护外壳图；Fig. 3 is used for the protective case diagram of the sleeve type load cell of support structure;
图4用于支架结构的套筒式测力传感器的结构示意图；Fig. 4 is used for the structural representation of the sleeve type load cell of support structure;
图5用于支架结构的套筒式测力传感器的安装示意图；Fig. 5 is used for the installation schematic diagram of the sleeve type load cell of support structure;
图中：1、弹性元件，2、电阻应变片，3、第一侧方紧固螺钉，4、保护外壳、5、第二侧方紧固螺钉，6、电阻应变片，7、第三侧方紧固螺钉，8、第四侧方紧固螺钉，9、固定接头，10，支架结构钢管，11、丝杠螺母，12、用于支架结构的套筒式测力传感器，13、底座。In the figure: 1. elastic element, 2. resistance strain gauge, 3. first side fastening screw, 4. protective shell, 5. second side fastening screw, 6. resistance strain gauge, 7. third side Square fastening screw, 8, the fourth side fastening screw, 9, fixed joint, 10, support structure steel pipe, 11, leading screw nut, 12, sleeve type load cell for support structure, 13, base.
具体实施方式Detailed ways
下面结合附图和实施例对本发明作进一步说明，且以下实施例只是描述性的不是限定性的，不能以此来限定本发明的保护范围。The present invention will be further described below in conjunction with the accompanying drawings and examples, and the following examples are only descriptive and not restrictive, and cannot be used to limit the protection scope of the present invention.
如图1-4，为本发明用于支架结构的套筒式测力传感器的结构示意图；弹性元件1采用高强度金属材料，外形为套筒式，顶层设计为双层台阶式，两层台阶的内径分别设计为49mm和58mm。传感器与两种脚手架钢管的配合为过盈配合。保护外壳4采用轻质合金材料，满足保护弹性元件的需求并可减轻传感器整体重量，便于携带和安装。As shown in Figure 1-4, it is a schematic structural diagram of the sleeve type load cell used in the bracket structure of the present invention; the elastic element 1 is made of high-strength metal material, the shape is sleeve type, and the top layer is designed as a double-layer step type, with two steps The inner diameters are designed to be 49mm and 58mm respectively. The cooperation between the sensor and the two scaffold steel pipes is an interference fit. The protective shell 4 is made of a light alloy material, which meets the requirements of protecting the elastic element and can reduce the overall weight of the sensor, making it easy to carry and install.
如图4中所示，电阻应变片2和电阻应变片6的导线通过固定接头9引出，导线中共5根不同颜色的引线，分别为正电源先线、负电源线、正信号线、负信号线和地线。As shown in Figure 4, the wires of the resistance strain gauge 2 and the resistance strain gauge 6 are led out through the fixed joint 9, and there are 5 lead wires of different colors in the wires, which are respectively the positive power line, the negative power line, the positive signal line, and the negative signal line. wire and ground.
如图5中所示，传感器安装过程如下：首先将传感器安装在支架结构底座的丝杠螺母上，再将支架结构的钢管放置与传感器的台阶中，传感器内壁与丝杠无任何接触，则传感器仅承受上方支架结构立杆的压力。传感器的导线外接工业常用的变送器和智能显示仪，即可监测出支架结构立杆的压力。As shown in Figure 5, the installation process of the sensor is as follows: first, install the sensor on the screw nut of the base of the bracket structure, and then place the steel pipe of the bracket structure on the step of the sensor, the sensor inner wall does not have any contact with the screw, then the sensor Only bears the pressure of the vertical pole of the support structure above. The wire of the sensor is externally connected to a transmitter and an intelligent display commonly used in the industry, and the pressure of the vertical pole of the support structure can be monitored.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105928642A (en) * | 2016-04-23 | 2016-09-07 | 北京工业大学 | Detachable sleeve type force sensor used for bracket structure |
| CN107989357A (en) * | 2018-01-22 | 2018-05-04 | 晋江万芯晨电子科技有限公司 | The intelligent scaffolding steel pipe of stress can be surveyed |
| CN108019035A (en) * | 2017-12-28 | 2018-05-11 | 晋江万芯晨电子科技有限公司 | The jacket-type scaffold base of steel pipe stress can be monitored |
| CN113358464A (en) * | 2021-05-23 | 2021-09-07 | 北京工业大学 | Force measuring device under reinforced concrete slab column structure column and calibration kit |
| CN115014586A (en) * | 2022-06-08 | 2022-09-06 | 无锡交通建设工程集团有限公司 | Intelligent monitoring and detecting device for HDS supporting and erecting frame |
| WO2023230646A1 (en) * | 2022-06-01 | 2023-12-07 | IQM Systems Pty Ltd | Scaffold load sensing device and monitoring system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105928642A (en) * | 2016-04-23 | 2016-09-07 | 北京工业大学 | Detachable sleeve type force sensor used for bracket structure |
| CN105928642B (en) * | 2016-04-23 | 2018-10-12 | 北京工业大学 | A kind of removable sleeve formula force snesor for supporting structure |
| CN108019035A (en) * | 2017-12-28 | 2018-05-11 | 晋江万芯晨电子科技有限公司 | The jacket-type scaffold base of steel pipe stress can be monitored |
| CN107989357A (en) * | 2018-01-22 | 2018-05-04 | 晋江万芯晨电子科技有限公司 | The intelligent scaffolding steel pipe of stress can be surveyed |
| CN113358464A (en) * | 2021-05-23 | 2021-09-07 | 北京工业大学 | Force measuring device under reinforced concrete slab column structure column and calibration kit |
| WO2023230646A1 (en) * | 2022-06-01 | 2023-12-07 | IQM Systems Pty Ltd | Scaffold load sensing device and monitoring system |
| CN115014586A (en) * | 2022-06-08 | 2022-09-06 | 无锡交通建设工程集团有限公司 | Intelligent monitoring and detecting device for HDS supporting and erecting frame |
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