Method, system, device and medium for testing deflection of escalator or moving walkway

Abstract

The present invention discloses a deflection test method, system, device and medium for an escalator or moving walkway. The method comprises: constructing a truss stress model of the escalator or moving walkway; performing finite element analysis on the truss stress model to determine a plurality of deflection test points; performing strain tests on a plurality of resistance strain gauges under no-load conditions, and determining a first deflection value of the escalator or moving walkway according to the strain test results; performing strain tests on a plurality of resistance strain gauges under preset load conditions, and determining a second deflection value of the escalator or moving walkway according to the strain test results; and determining a deflection change curve of each deflection test point according to the first deflection value and the second deflection value. The present invention performs finite element analysis on the truss stress model, improves the comprehensiveness and accuracy of the deflection test, sets resistance strain gauges and performs strain tests, further improves the accuracy of the truss deflection test, and can be widely used in the field of engineering measurement technology.

Description

Technical Field

[0001] The invention relates to the technical field of engineering measurement, in particular to a method, system, device and storage medium for testing the deflection of an escalator or a moving walkway. Background Art

[0002] A truss is a structure made of rods connected at both ends with hinges. It is the main support structure of escalators and moving walkways. It is used to install and support various components of escalators and moving walkways, carry passenger loads, and connect two floors or different parts of a building with different heights. According to the design requirements of 5.25 support structure in GB16899-2011, the maximum deflection calculated and measured based on the load of 5000N / m2 should not be greater than 1 / 750 of the support distance, and the public transportation escalator should not be greater than 1 / 1000 of the support distance. Therefore, it is very important to determine the mechanical properties of the truss. Traditional test methods (such as the piano wire method and the dial indicator method) are not at the same point before and after loading, resulting in inaccurate test results. Summary of the invention

[0003] The purpose of the present invention is to solve one of the technical problems existing in the prior art to at least a certain extent.

[0004] To this end, an object of an embodiment of the present invention is to provide a method for testing the deflection of an escalator or a moving walkway, which can comprehensively and accurately measure the truss deflection data of the escalator or the moving walkway.

[0005] Another object of an embodiment of the present invention is to provide a deflection testing system for an escalator or a moving walkway.

[0006] In order to achieve the above technical objectives, the technical solutions adopted by the embodiments of the present invention include:

[0007] In a first aspect, an embodiment of the present invention provides a method for testing the deflection of an escalator or a moving walkway, comprising the following steps:

[0008] Construct a truss load model for an escalator or moving walkway;

[0009] Performing finite element analysis on the truss stress model to determine a plurality of deflection test points, wherein the deflection test points include a maximum deflection point;

[0010] Under no-load conditions, a strain test is performed on a plurality of resistance strain gauges, and then a first deflection value of the escalator or moving walkway is determined according to the strain test results, wherein the truss of the escalator or moving walkway is placed sideways on a horizontal plane, and the plurality of resistance strain gauges are installed at the deflection test points;

[0011] Under a preset load condition, a plurality of resistance strain gauges are subjected to strain testing, and a second deflection value of the escalator or moving walkway is determined according to the strain testing result, wherein the truss of the escalator or moving walkway is assembled on a horizontal plane, and the plurality of resistance strain gauges are installed at the deflection testing points;

[0012] The deflection variation curve of each deflection test point is determined according to the first deflection value and the second deflection value.

[0013] Furthermore, in one embodiment of the present invention, the truss force model is:

[0014]

[0015] Among them, ε represents the strain of the truss, M represents the bending moment of the truss, a represents the distance between the strain surface of the truss and the neutral layer, E represents the elastic modulus of the truss, and I z It represents the moment of inertia of the truss cross section about the neutral axis.

[0016] Furthermore, in one embodiment of the present invention, the step of performing finite element analysis on the truss stress model to determine a plurality of deflection test points specifically includes:

[0017] Finite element analysis is performed on the truss stress model to determine the maximum deflection point:

[0018] According to the maximum deflection point, a plurality of deflection test points are selected in sequence at preset intervals.

[0019] Furthermore, in one embodiment of the present invention, the plurality of deflection test points are installed with a first resistance strain gauge, a second resistance strain gauge, a third resistance strain gauge and a fourth resistance strain gauge of the same specifications, the first resistance strain gauge and the third resistance strain gauge are both arranged on the upper surface of the truss, the second resistance strain gauge and the fourth resistance strain gauge are both arranged on the lower surface of the truss, and the first resistance strain gauge, the second resistance strain gauge, the third resistance strain gauge and the fourth resistance strain gauge are connected in sequence in a Wheatstone bridge manner.

[0020] Further, in one embodiment of the present invention, the step of performing strain testing on a plurality of resistance strain gauges is specifically as follows:

[0021] Input an initial voltage between the first joint and the second joint, and measure an output voltage between the third joint and the fourth joint;

[0022] Among them, the first joint is located between the first resistance strain gauge and the fourth resistance strain gauge, the second joint is located between the second resistance strain gauge and the third resistance strain gauge, the third joint is located between the first resistance strain gauge and the second resistance strain gauge, and the fourth joint is located between the third resistance strain gauge and the fourth resistance strain gauge.

[0023] Further, in one embodiment of the present invention, the first deflection value or the second deflection value is determined according to the following formula:

[0024]

[0025] Among them, f B Indicates the first deflection value or the second deflection value, U y represents the output voltage, l represents the total length of the truss, S represents the sensitivity value of the resistance strain gauge, U0 represents the initial voltage, and b represents the width of the truss.

[0026] Further, in one embodiment of the present invention, the step of determining the deflection change curve of each deflection test point according to the first deflection value and the second deflection value specifically includes:

[0027] Determining a plurality of sets of deflection-load data according to the first deflection value, the second deflection value, and a load condition corresponding to the second deflection value;

[0028] Curve fitting is performed based on the deflection-load data to obtain the deflection change curve of each deflection test point.

[0029] In a second aspect, an embodiment of the present invention provides a deflection testing system for an escalator or a moving walkway, comprising:

[0030] Truss force model building module, used to build the truss force model of escalators or moving walkways;

[0031] A deflection test point determination module is used to perform finite element analysis on the truss force model to determine a plurality of deflection test points, wherein the deflection test points include a maximum deflection point;

[0032] A first strain testing module is used to perform strain testing on a plurality of resistance strain gauges under a non-loading condition, and then determine a first deflection value of the escalator or moving walkway according to the strain testing result, wherein the truss of the escalator or moving walkway is placed sideways on a horizontal plane, and the plurality of resistance strain gauges are installed at the deflection testing points;

[0033] A second strain testing module is used to perform strain testing on a plurality of resistance strain gauges under a preset load condition, and then determine a second deflection value of the escalator or moving walkway according to the strain testing result, wherein the truss of the escalator or moving walkway is assembled on a horizontal plane, and the plurality of resistance strain gauges are installed at the deflection testing points;

[0034] A deflection change curve determination module is used to determine the deflection change curve of each deflection test point according to the first deflection value and the second deflection value.

[0035] In a third aspect, an embodiment of the present invention provides a deflection testing device for an escalator or a moving walkway, comprising:

[0036] at least one processor;

[0037] at least one memory for storing at least one program;

[0038] When the at least one program is executed by the at least one processor, the at least one processor implements the above-mentioned deflection testing method for an escalator or a moving walkway.

[0039] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, in which a program executable by a processor is stored. When the program executable by the processor is executed by the processor, it is used to perform the above-mentioned escalator or moving walkway deflection test method.

[0040] The advantages and beneficial effects of the present invention will be partly given in the following description, partly become apparent from the following description, or be understood through the practice of the present invention:

[0041] The embodiment of the present invention first constructs a truss stress model of an escalator or a moving walkway, performs finite element analysis on the truss stress model, determines multiple deflection test points, and then installs corresponding resistance strain gauges at each deflection test point, performs strain tests on the resistance strain gauges under no load and preset load conditions, and determines the deflection value of the escalator or moving walkway under different loads according to the results of the strain test, and then determines the deflection change curve of each deflection test point according to the deflection value, and the deflection change curve can be used for the safety assessment of the escalator or moving walkway. The embodiment of the present invention can determine and mark multiple deflection test points by performing finite element analysis on the truss stress model, and the test points will not change in subsequent deflection measurements, thereby improving the comprehensiveness and accuracy of the truss deflection test; by setting resistance strain gauges and performing strain tests to calculate the deflection value of the escalator or moving walkway, the accuracy of the truss deflection test is further improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solution in the embodiments of the present invention, the following introduction is made to the drawings required for use in the embodiments of the present invention. It should be understood that the drawings introduced below are only for the convenience of clearly describing some embodiments of the technical solution of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0043] Figure 1 A flowchart of the steps of a method for testing the deflection of an escalator or moving walkway provided by an embodiment of the present invention;

[0044] Figure 2 A schematic diagram of force analysis of bending deformation of a truss provided in an embodiment of the present invention;

[0045] Figure 3 A schematic diagram of a normal assembly of an escalator provided by an embodiment of the present invention;

[0046] Figure 4 A schematic diagram of an escalator provided by an embodiment of the present invention when placed sideways;

[0047] Figure 5 A schematic diagram of the connection of a first resistance strain gauge, a second resistance strain gauge, a third resistance strain gauge and a fourth resistance strain gauge provided in an embodiment of the present invention;

[0048] Figure 6 A structural block diagram of an escalator or moving walkway deflection testing system provided by an embodiment of the present invention;

[0049] Figure 7 A structural block diagram of an escalator or moving walkway deflection testing device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0050] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and are not to be construed as limitations of the present invention. For the step numbers in the following embodiments, they are only provided for the convenience of explanation, and the order between the steps is not limited in any way, and the execution order of each step in the embodiment can be adaptively adjusted according to the understanding of those skilled in the art.

[0051] In the description of the present invention, the meaning of "a plurality" is two or more than two. If there is a description of "a first" or "a second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features. In addition, unless otherwise defined, all technical and scientific terms used in this document have the same meaning as those commonly understood by those skilled in the art.

[0052] Reference Figure 1 The embodiment of the present invention provides a method for testing the deflection of an escalator or a moving walkway, which specifically includes the following steps:

[0053] S101. Construct a truss force model of an escalator or moving walkway.

[0054] Specifically, a truss force model is constructed according to specific structural parameters of the truss, and the model can determine the relationship between the strain of the truss and the bending moment it is subjected to.

[0055] As an optional implementation, the truss force model is:

[0056]

[0057] Among them, ε represents the strain of the truss, M represents the bending moment of the truss, a represents the distance between the strain surface of the truss and the neutral layer, E represents the elastic modulus of the truss, and I z It represents the moment of inertia of the truss cross section about the neutral axis.

[0058] Specifically, Figure 2 As shown in the figure, the truss will bend under the action of pure bending moment M. The curve formed by the axis of the truss is called the deflection curve, which also generates principal stress and strain ε. The calculation formula of strain ε is as follows:

[0059]

[0060] Where a represents the distance between the truss strain surface and the neutral layer, and ρ represents the curvature radius of the neutral layer;

[0061] By ∑M z =0, we get:

[0062]

[0063] Where, E represents the elastic modulus of the truss, and A represents the cross-sectional area of ​​the truss;

[0064] And ∫ A a 2 dA=I z , I z represents the moment of inertia of the truss cross section about the neutral axis;

[0065] Therefore:

[0066]

[0067] Combined with the calculation formula of strain ε, we can get:

[0068]

[0069] It can be seen that for a given truss structure, the strain ε is proportional to the bending moment M.

[0070] S102. Perform finite element analysis on the truss stress model to determine a plurality of deflection test points, wherein the deflection test points include a maximum deflection point.

[0071] Specifically, according to the structural parameters of the truss, a finite element analysis is performed on the truss hand model to determine the maximum deflection point of the truss, and multiple other deflection test points can be selected based on the maximum deflection point. Step S102 specifically includes the following steps:

[0072] S1021. Perform finite element analysis on the truss stress model to determine the maximum deflection point:

[0073] S1022. According to the maximum deflection point, select a plurality of deflection test points in sequence at preset intervals.

[0074] Specifically, the selected deflection test points need to be marked to facilitate the subsequent installation of resistance strain gauges.

[0075] S103. Under no-load conditions, perform strain tests on a plurality of resistance strain gauges, and then determine a first deflection value of the escalator or moving walkway according to the strain test results, wherein the truss of the escalator or moving walkway is placed sideways on a horizontal plane, and a plurality of resistance strain gauges are installed at deflection test points.

[0076] Specifically, taking an escalator as an example, Figure 4 As shown, the truss of the escalator is placed upside down on a horizontal plane before assembly so that the truss is as stress-free as possible. Then, a resistance strain gauge is attached to the determined deflection test point, and the resistance strain gauge is connected to the strain tester and the computer and powered continuously to record the strain test data.

[0077] Further as an optional implementation, multiple deflection test points are installed with a first resistance strain gauge, a second resistance strain gauge, a third resistance strain gauge and a fourth resistance strain gauge of the same specifications, the first resistance strain gauge and the third resistance strain gauge are both arranged on the upper surface of the truss, the second resistance strain gauge and the fourth resistance strain gauge are both arranged on the lower surface of the truss, and the first resistance strain gauge, the second resistance strain gauge, the third resistance strain gauge and the fourth resistance strain gauge are connected in sequence in the manner of a Wheatstone bridge.

[0078] Specifically, four resistance strain gauges R1, R2, R3 and R4 of the same specifications are installed at the same deflection test point, R1 and R3 are attached to the upper surface of the truss, and R2 and R4 are attached to the lower surface of the truss. When the truss is bent and deformed, the resistance strain gauges R1 and R3 are tensile, and R2 and R4 are compressed. R1 and R3 produce tensile strain, and R2 and R4 produce compressive strain, and the absolute values ​​of the strains are the same, that is, ε1=ε3=ε 拉 +ε T , ε2=ε4=ε 压 +ε T , ε 拉 =-ε 压 , where ε T Represents the strain caused by temperature change.

[0079] The resistance values ​​of R1, R2, R3 and R4 also change, and the amount of change is:

[0080] ΔR1=ΔR3=SR(ε 拉 +ε T )

[0081] ΔR2=ΔR4=SR(-ε 拉 +ε T )

[0082] Wherein, R represents the nominal value of the resistance strain gauge, and S represents the sensitivity value of the resistance strain gauge.

[0083] like Figure 5 As shown in the figure, the resistance strain gauges R1, R2, R3 and R4 are connected to form a Wheatstone bridge, which can make the temperature-induced strain ε T The self-compensation of R1, R2, R3 and R4 further improves the accuracy of the deflection test.

[0084] Optionally, before installing the resistance strain gauge, each deflection test point needs to be polished smooth to ensure that the deformation of the resistance strain gauge is consistent with the truss, which can further improve the accuracy of the deflection test.

[0085] As an optional implementation, the step of performing strain testing on a plurality of resistance strain gauges is specifically as follows:

[0086] Input an initial voltage between the first joint and the second joint, and measure an output voltage between the third joint and the fourth joint;

[0087] Among them, the first joint is located between the first resistance strain gauge and the fourth resistance strain gauge, the second joint is located between the second resistance strain gauge and the third resistance strain gauge, the third joint is located between the first resistance strain gauge and the second resistance strain gauge, and the fourth joint is located between the third resistance strain gauge and the fourth resistance strain gauge.

[0088] Specifically, Figure 5 As shown, an initial voltage U0 is input between the first and second terminals, and then an output voltage U0 is measured between the third and fourth terminals. y , according to the characteristics of the Wheatstone bridge, the two have the following relationship:

[0089]

[0090] Among them, U y It can be directly measured by a strain tester.

[0091] The deflection value can be calculated by the following formula:

[0092]

[0093] Among them, f B represents the deflection value, l represents;

[0094] So we can get:

[0095]

[0096] Wherein, b=2a represents the width of the truss.

[0097] According to the above formula, the first deflection value of the truss under unloaded conditions can be calculated.

[0098] S104. Under a preset load condition, a plurality of resistance strain gauges are subjected to strain testing, and a second deflection value of the escalator or moving walkway is determined according to the strain testing results, wherein a truss of the escalator or moving walkway is assembled on a horizontal plane, and a plurality of resistance strain gauges are installed at deflection testing points.

[0099] Specifically, taking an escalator as an example, Figure 3 As shown, the truss is placed normally, then assembled and hoisted, and then the hoisted truss is loaded, such as 5000N / m 2 Loading, continue to perform strain testing on the resistance strain gauge and record data. The specific process can refer to the content in the aforementioned step S103, which will not be repeated here.

[0100] As a further optional implementation, the first deflection value or the second deflection value is determined according to the following formula:

[0101]

[0102] Among them, f B Indicates the first deflection value or the second deflection value, U y represents the output voltage, l represents the total length of the truss, S represents the sensitivity value of the resistance strain gauge, U0 represents the initial voltage, and b represents the width of the truss.

[0103] Optionally, multiple gradient load conditions may be pre-set for testing to improve the comprehensiveness of the test.

[0104] S105. Determine a deflection variation curve of each deflection test point according to the first deflection value and the second deflection value.

[0105] Specifically, the embodiment of the present invention can calculate the maximum deflection of the truss before and after loading according to the values ​​of the initial voltage and the output voltage before and after the truss is hoisted, and can also calculate the deflection change of the truss according to the state where the main chord of the truss side is not stressed and the values ​​of the initial voltage and the output voltage when the truss is loaded. Step S105 specifically includes the following steps:

[0106] S1051, determining multiple sets of deflection-load data according to the first deflection value, the second deflection value, and the load condition corresponding to the second deflection value;

[0107] S1052. Perform curve fitting based on the deflection-load data to obtain the deflection change curve of each deflection test point.

[0108] Specifically, in an embodiment of the present invention, multiple gradient load conditions are pre-set, and multiple groups of second deflection values ​​can be tested and obtained, and then curve fitting is used to obtain the deflection change curve of each deflection test point, thereby providing data support for the safety assessment of escalators or moving walkways.

[0109] The above is a description of the method steps of the embodiment of the present invention. It can be recognized that the embodiment of the present invention can determine and mark multiple deflection test points by performing finite element analysis on the truss force model, and the test points will not change in subsequent deflection measurements, thereby improving the comprehensiveness and accuracy of the truss deflection test; by setting a resistance strain gauge and performing a strain test to calculate the deflection value of the escalator or moving walkway, the accuracy of the truss deflection test is further improved.

[0110] Reference Figure 6 The embodiment of the present invention provides a deflection testing system for an escalator or a moving walkway, comprising:

[0111] Truss force model building module, used to build the truss force model of escalators or moving walkways;

[0112] A deflection test point determination module is used to perform finite element analysis on the truss stress model and determine multiple deflection test points, including the maximum deflection point;

[0113] A first strain test module is used to perform strain tests on a plurality of resistance strain gauges under a non-loading condition, and then determine a first deflection value of the escalator or moving walkway according to the strain test results, wherein the truss of the escalator or moving walkway is placed sideways on a horizontal plane, and the plurality of resistance strain gauges are installed at deflection test points;

[0114] A second strain testing module is used to perform strain testing on a plurality of resistance strain gauges under a preset load condition, and then determine a second deflection value of the escalator or moving walkway according to the strain testing result, wherein the truss of the escalator or moving walkway is assembled on a horizontal plane, and the plurality of resistance strain gauges are installed at deflection testing points;

[0115] The deflection change curve determination module is used to determine the deflection change curve of each deflection test point according to the first deflection value and the second deflection value.

[0116] The contents of the above method embodiments are all applicable to the present system embodiments. The functions specifically implemented by the present system embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0117] Reference Figure 7 , an embodiment of the present invention provides a deflection testing device for an escalator or a moving walkway, comprising:

[0118] at least one processor;

[0119] at least one memory for storing at least one program;

[0120] When the at least one program is executed by the at least one processor, the at least one processor implements the above-mentioned escalator or moving walkway deflection testing method.

[0121] The contents of the above method embodiments are all applicable to the present device embodiments. The functions specifically implemented by the present device embodiments are the same as those of the above method embodiments, and the beneficial effects achieved are also the same as those achieved by the above method embodiments.

[0122] An embodiment of the present invention further provides a computer-readable storage medium, in which a program executable by a processor is stored. When the program executable by the processor is executed by the processor, it is used to perform the above-mentioned deflection test method of an escalator or a moving walkway.

[0123] A computer-readable storage medium according to an embodiment of the present invention can execute an escalator or moving walkway deflection testing method provided by an embodiment of the present invention, can execute any combination of implementation steps of the method embodiment, and has the corresponding functions and beneficial effects of the method.

[0124] The embodiment of the present invention also discloses a computer program product or a computer program, wherein the computer program product or the computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. A processor of a computer device can read the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes Figure 1 The method shown.

[0125] In some selectable embodiments, the function / operation mentioned in the block diagram may not occur in the order mentioned in the operation diagram. For example, depending on the function / operation involved, the two boxes shown in succession can actually be executed substantially simultaneously or the above-mentioned boxes can sometimes be executed in reverse order. In addition, the embodiment presented and described in the flow chart of the present invention is provided by way of example, for the purpose of providing a more comprehensive understanding of technology. The disclosed method is not limited to the operation and logic flow presented herein. Selectable embodiments are expected, wherein the order of various operations is changed and the sub-operation of a part for which is described as a larger operation is performed independently.

[0126] In addition, although the present invention is described in the context of functional modules, it should be understood that, unless otherwise specified to the contrary, one or more of the above-mentioned functions and / or features can be integrated into a single physical device and / or software module, or one or more functions and / or features can be implemented in a separate physical device or software module. It is also understood that a detailed discussion of the actual implementation of each module is unnecessary for understanding the present invention. More specifically, in view of the properties, functions and internal relationships of the various functional modules in the device disclosed herein, the actual implementation of the module will be understood within the conventional skills of the engineer. Therefore, those skilled in the art can implement the present invention set forth in the claims without excessive experimentation using ordinary techniques. It is also understood that the specific concepts disclosed are merely illustrative and are not intended to limit the scope of the present invention, which is determined by the full scope of the appended claims and their equivalents.

[0127] If the above functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the above methods of each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk and other media that can store program codes.

[0128] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0129] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and editable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the above-mentioned program is printed, since the above-mentioned program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or processing in other suitable ways as necessary, and then stored in a computer memory.

[0130] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0131] In the above description of this specification, the description with reference to the terms "one embodiment / example", "another embodiment / example" or "certain embodiments / examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0132] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

[0133] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the above embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A method for testing the deflection of an escalator or moving walkway, characterized in that: The following steps are involved: Construct a truss load model for an escalator or moving walkway; Performing finite element analysis on the truss stress model to determine a plurality of deflection test points, wherein the deflection test points include a maximum deflection point; Under no-load conditions, a strain test is performed on a plurality of resistance strain gauges, and then a first deflection value of the escalator or moving walkway is determined according to the strain test results, wherein the truss of the escalator or moving walkway is placed sideways on a horizontal plane, and the plurality of resistance strain gauges are installed at the deflection test points; Under a preset load condition, a plurality of resistance strain gauges are subjected to strain testing, and a second deflection value of the escalator or moving walkway is determined according to the strain testing result, wherein the truss of the escalator or moving walkway is assembled on a horizontal plane, and the plurality of resistance strain gauges are installed at the deflection testing points; The deflection variation curve of each deflection test point is determined according to the first deflection value and the second deflection value.

2. A deflection testing method for an escalator or moving walkway according to claim 1, characterized in that: The truss force model is: Among them, ε represents the strain of the truss, M represents the bending moment of the truss, a represents the distance between the strain surface of the truss and the neutral layer, E represents the elastic modulus of the truss, and I z It represents the moment of inertia of the truss cross section about the neutral axis.

3. The deflection testing method of an escalator or moving walkway according to claim 1, characterized in that: The step of performing finite element analysis on the truss stress model to determine multiple deflection test points specifically includes: Finite element analysis is performed on the truss stress model to determine the maximum deflection point: According to the maximum deflection point, a plurality of deflection test points are selected in sequence at preset intervals.

4. The deflection testing method for an escalator or moving walkway according to claim 1, characterized in that: The plurality of deflection test points are all installed with a first resistance strain gauge, a second resistance strain gauge, a third resistance strain gauge and a fourth resistance strain gauge of the same specifications, the first resistance strain gauge and the third resistance strain gauge are both arranged on the upper surface of the truss, the second resistance strain gauge and the fourth resistance strain gauge are both arranged on the lower surface of the truss, and the first resistance strain gauge, the second resistance strain gauge, the third resistance strain gauge and the fourth resistance strain gauge are connected in sequence in the manner of a Wheatstone bridge.

5. A deflection testing method for an escalator or moving walkway according to claim 4, characterized in that: The step of performing strain testing on a plurality of resistance strain gauges is specifically as follows: An initial voltage is input between the first joint and the second joint, and an output voltage is measured between the third joint and the fourth joint; wherein the first joint is located between the first resistance strain gauge and the fourth resistance strain gauge, the second joint is located between the second resistance strain gauge and the third resistance strain gauge, the third joint is located between the first resistance strain gauge and the second resistance strain gauge, and the fourth joint is located between the third resistance strain gauge and the fourth resistance strain gauge.

6. A deflection testing method for an escalator or moving walkway according to claim 5, characterized in that: The first deflection value or the second deflection value is determined according to the following formula: Among them, f B Indicates the first deflection value or the second deflection value, U y represents the output voltage, l represents the total length of the truss, S represents the sensitivity value of the resistance strain gauge, U0 represents the initial voltage, and b represents the width of the truss.

7. A deflection testing method for an escalator or moving walkway according to any one of claims 1 to 6, characterized in that: The step of determining the deflection change curve of each deflection test point according to the first deflection value and the second deflection value specifically includes: Determining a plurality of sets of deflection-load data according to the first deflection value, the second deflection value, and a load condition corresponding to the second deflection value; Curve fitting is performed based on the deflection-load data to obtain the deflection change curve of each deflection test point.

8. An escalator or moving walkway deflection testing system, characterized in that: include: Truss force model building module, used to build the truss force model of escalators or moving walkways; A deflection test point determination module is used to perform finite element analysis on the truss force model to determine a plurality of deflection test points, wherein the deflection test points include a maximum deflection point; A first strain testing module is used to perform strain testing on a plurality of resistance strain gauges under a non-loading condition, and then determine a first deflection value of the escalator or moving walkway according to the strain testing result, wherein the truss of the escalator or moving walkway is placed sideways on a horizontal plane, and the plurality of resistance strain gauges are installed at the deflection testing points; A second strain testing module is used to perform strain testing on a plurality of resistance strain gauges under a preset load condition, and then determine a second deflection value of the escalator or moving walkway according to the strain testing result, wherein the truss of the escalator or moving walkway is assembled on a horizontal plane, and the plurality of resistance strain gauges are installed at the deflection testing points; A deflection change curve determination module is used to determine the deflection change curve of each deflection test point according to the first deflection value and the second deflection value.

9. An escalator or moving walkway deflection testing device, characterized in that: include: at least one processor; at least one memory for storing at least one program; When the at least one program is executed by the at least one processor, the at least one processor implements the deflection testing method for an escalator or a moving walkway as described in any one of claims 1 to 7.

10. A computer-readable storage medium storing a program executable by a processor, characterized in that: The program executable by the processor is used to perform a deflection testing method for an escalator or a moving walkway as claimed in any one of claims 1 to 7 when executed by the processor.

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