Engineering machinery whole machine controllability test method and test device

Abstract

The present application provides a method and device for testing the controllability of a complete engineering machinery, which relates to the technical field of engineering machinery, and includes: continuously acquiring a displacement signal of an operating part during the process of switching from a first of a plurality of operating positions to a second of a plurality of operating positions, and continuously acquiring a speed signal of an actuator during the process of switching from one of a plurality of motion states corresponding to the first to another of a plurality of motion states corresponding to the second; placing the acquired displacement signal and the acquired speed signal on the same time axis, obtaining a time period for the operation position switching of the operating part and a time period for the motion state switching of the actuator, determining the time point for the motion state switching of the reel mechanism according to the speed signal, and calculating the response time of the engineering machinery. This greatly satisfies the required data and the corresponding calculation requirements, and provides real and effective data for product performance. Compared with traditional testing methods, the operation precision and accuracy are improved.

Description

Technical Field

[0001] The present application relates to the technical field of engineering machinery, and in particular to a method and a device for testing the controllability of an entire engineering machinery. Background Art

[0002] The maneuverability of the whole machine is an important indicator for evaluating the performance of construction machinery. At present, the maneuverability test on construction machinery often depends on the personal subjective feelings of the operator, and uses simple instruments (such as stopwatches) to record some time indicators. It lacks professionalism and has a certain one-sidedness. Summary of the invention

[0003] In view of this, the present application provides a method and a device for testing the maneuverability of engineering machinery, the purpose of which is to solve the above technical problems to a certain extent.

[0004] In a first aspect, the present application provides a method for testing the maneuverability of a complete engineering machinery, which is used for an engineering machinery, wherein the engineering machinery comprises:

[0005] An operating part and an actuator, wherein the operating part can control the movement of the actuator;

[0006] The operating portion includes a plurality of operating positions, and the motion state of the actuator has a plurality of motion states respectively corresponding to the plurality of operating positions;

[0007] The engineering machinery whole machine controllability testing method comprises:

[0008] A picking step, continuously acquiring a displacement signal of the operating portion during a process of switching from a first one of the plurality of operating positions to a second one of the plurality of operating positions, and continuously acquiring a speed signal of the actuator during a process of switching from one of the plurality of motion states corresponding to the first one to another of the plurality of motion states corresponding to the second one;

[0009] The analysis step is to place the acquired displacement signal and the acquired speed signal on the same time axis, obtain the time period of the operating position conversion of the operating part and the time period of the motion state conversion of the actuator, determine the time point when the motion state conversion of the actuator is completed according to the speed signal, and calculate the response time of the engineering machinery.

[0010] Preferably, the operating position includes a neutral position, a first start position and a second start position, and the motion state includes a static state, a first speed state and a second speed state corresponding to the neutral position, the first start position and the second start position respectively;

[0011] When the operating part is switched from the neutral position to the first start position, the actuator is switched from the static state to the first speed state, and the analysis step calculates the start response time in the response time;

[0012] When the operating part is switched from the first start position to the middle position, the actuator is switched from the first speed state to the static state, and the analysis step calculates the stop response time in the response time;

[0013] When the operating part is switched from the first start position to the second start position, the actuator is switched from the first speed state to the second speed state, and the analysis step calculates the acceleration response time in the response time.

[0014] Preferably, when the operating portion is switched from the neutral position to the first starting position:

[0015] Acquire the time point when the actuator starts to accelerate on the time axis, and then acquire the displacement signal of the operating part corresponding to the time point and define it as an empty stroke signal;

[0016] Acquire a displacement signal when the operating part is located at a first start position on the time axis and define the displacement signal as a total stroke signal;

[0017] The percentage of the empty stroke signal to the total stroke signal is defined as an empty stroke index.

[0018] Preferably, the actuator is capable of releasing the rope during movement, and within a time range of 0.3 seconds to 1 second, the operation of the operating part completing the switching from the neutral position to the first starting position and then switching back to the neutral position is defined as an inching operation;

[0019] The picking up step further includes: obtaining the length of the rope released by the actuator after the inching operation once, and the length of the rope at the release point is defined as the inching rope output amount.

[0020] In a second aspect, the present application provides a testing device for executing the above-mentioned method for testing the maneuverability of a complete engineering machinery.

[0021] Preferably, the operating unit controls the actuator via a hydraulic system, and the testing device comprises:

[0022] A displacement pickup mechanism, used to pick up the displacement of the operating part and output a displacement signal;

[0023] A speed pickup mechanism, used to pick up the speed of the actuator and output a speed signal;

[0024] The data acquisition mechanism is communicatively connected with both the displacement pickup mechanism and the speed pickup mechanism to receive the displacement signal and the speed signal.

[0025] Preferably, the engineering machinery further comprises an armrest box, the armrest box is formed with a mounting surface, the operating portion is formed as an operating handle, and the operating handle is mounted on the mounting surface; the displacement pickup mechanism comprises:

[0026] A support assembly, disposed on the mounting surface;

[0027] A displacement sensor, the displacement sensor is used to pick up the displacement of the operating handle to transmit the output displacement signal to the data acquisition mechanism;

[0028] A connecting member is used to connect the displacement sensor.

[0029] Preferably, the support assembly comprises a first support member and a second support member connected to each other, the first support member is arranged on the mounting surface, the second support member extends toward the operating handle, and the displacement sensor is mounted on the second support member;

[0030] The coupling member is formed as a flexible cable, and when the operating handle is in a neutral position, the flexible cable is parallel to the mounting surface.

[0031] Preferably, the actuator is formed as a reel mechanism, and the speed pickup mechanism further comprises:

[0032] A synchronization component, which forms a close fit with the reel mechanism so as to be linked with the reel mechanism;

[0033] The speed sensor is arranged on the synchronization component and is used to obtain the rotation speed of the synchronization component to transmit the speed signal to the data acquisition mechanism.

[0034] Preferably, the synchronization component comprises:

[0035] a wheel member, comprising a flexible wheel portion whose outer portion is closely matched with the outer portion of the reel mechanism, and a shaft portion which is partially accommodated inside the sleeve member and can rotate relative to the sleeve member;

[0036] A tensioning seat and a tensioning member, wherein two ends of the tensioning member are respectively connected to the sleeve member and the tensioning seat to maintain a close fit between the flexible wheel portion and the reel mechanism;

[0037] The speed sensor is formed as an encoder provided on the shaft portion;

[0038] A DC transmitter is provided between the data acquisition mechanism and the displacement pickup mechanism, and between the data acquisition mechanism and the speed pickup mechanism.

[0039] The engineering machinery controllability test method provided by this application greatly meets the data required by test engineers and the corresponding calculation requirements by displaying the displacement of the operating part and the speed of the actuator on the same time axis, and provides real and effective data for product performance. Compared with the traditional stopwatch and level test method, it greatly improves the operation precision and accuracy.

[0040] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 A schematic diagram of the test setup is shown.

[0043] Reference numerals:

[0044] 1-operating handle; 2-displacement sensor; 3-support assembly; 4-reel mechanism; 5-wheel member; 6-encoder; 7-data acquisition mechanism; 8-armrest box. DETAILED DESCRIPTION

[0045] The technical solution of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0046] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0047] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0049] This embodiment provides a method for testing the maneuverability of a complete engineering machine, which is used for an engineering machine. The engineering machine includes an operating handle 1 and a reel mechanism 4. The operating handle 1 can control the reel mechanism 4 to rotate via a hydraulic system. In the embodiment, the operating handle 1 can be arranged on an armrest box 8. Specifically, the armrest box 8 can be formed with a mounting surface, such as Figure 1 As shown, the mounting surface is Figure 1 The upper surface of the armrest box 8 is shown in FIG. In the embodiment, the whole-machine maneuverability test method of the construction machinery is performed by a test device, and the specific structure of the test device will be described in detail below.

[0050] In the embodiment, the testing device picks up various parameters. Specifically, the testing device may include a displacement picking mechanism and a speed picking mechanism. The displacement picking mechanism may be used to pick up the displacement of the operating handle 1 and output a displacement signal; the speed picking mechanism may be used to pick up the rotation speed of the reel mechanism 4 and output a speed signal.

[0051] The test device may further include a data acquisition mechanism 7, which may be, for example, a data acquisition instrument. The data acquisition mechanism 7 may be in communication connection with both the displacement pickup mechanism and the velocity pickup mechanism to receive the displacement signal and the velocity signal. Figure 1 As shown, Figure 1 The connection relationship between the displacement pickup mechanism and the speed pickup mechanism and the data acquisition mechanism 7 is shown, that is, the communication transmission of the signal is carried out in the form of electrical connection. As an advantageous option, a DC transmitter, preferably an open-type DC transmitter, can be provided on the line between the displacement pickup mechanism and the data acquisition mechanism 7 to make the signal accurate. Similarly, the line between the speed pickup mechanism and the data acquisition mechanism 7 can also be provided in the same manner.

[0052] Based on the features described above, the specific structures of the displacement pickup mechanism and the speed pickup mechanism will be described in detail below.

[0053] In an embodiment, the displacement pickup mechanism may include a support assembly 3, a displacement sensor 2, and a connecting member. The support assembly 3 may be disposed on a mounting surface. Specifically, the support assembly 3 may include a first support member and a second support member connected to each other, and the first support member is disposed on the mounting surface. The second support member extends toward the operating handle 1, which is conducive to shortening the length of the following flexible cable, so that the length of the flexible cable and the length of the second support member are matched within a reasonable range, which not only reduces the influence on the displacement sensor 2 obtaining the displacement signal, but also does not make the weight and volume of the support assembly 3 too large.

[0054] In an embodiment, the first support member and the second support member can be formed as plate members, and the displacement sensor 2 can be installed on the upper end surface of the second support member. In order to ensure that the displacement sensor 2 can be installed stably, the upper end surface of the second support member can be kept horizontal with the installation surface, and the first support member can be perpendicular to the installation surface.

[0055] As mentioned in the above description, the displacement sensor 2 can be installed on the upper end surface of the second support member, and the displacement sensor 2 can be used to pick up the displacement of the operating handle 1 to transmit the output displacement signal to the data acquisition mechanism 7. The connecting member can connect the displacement sensor 2, and the connecting member is formed as a flexible rope such as a pull rope. Figure 1 In the middle position shown in the figure, the rope can be parallel to the mounting surface, thus avoiding possible rope wear or loss of measurement accuracy caused by rope tilt.

[0056] In an embodiment, the speed pickup mechanism may include a synchronization component and a speed sensor. The synchronization component may form a close fit with the reel mechanism 4 to be linked with the reel mechanism 4. Specifically, the synchronization component may include a wheel member 5, and the wheel member 5 may include a flexible wheel portion whose outer portion is closely matched with the outer portion of the reel mechanism 4, and a shaft portion that is partially accommodated inside the sleeve member and can rotate relative to the sleeve member, for example, the shaft portion may be rotatably mounted inside the sleeve member via a bearing. The flexible wheel portion may be formed of a rubber material, so that when the reel mechanism 4 is attached, a close fit can be generated through deformation, thereby applying a certain friction force, thereby ensuring that the flexible wheel portion can rotate synchronously with the reel mechanism 4 without slipping.

[0057] The shaft portion may be a rigid shaft to ensure its assembly with the bearing. The flexible wheel portion may extend a sleeve portion, and then be sleeved on the outer side of the rigid shaft, and on this basis, the two may be further fixed by pins. The speed sensor may be formed as an encoder 6, which may be installed on the shaft portion or the inner ring of a bearing that rotates synchronously with the shaft portion to obtain the rotation speed of the shaft portion.

[0058] In the embodiment, the tight fit between the flexible wheel portion and the reel mechanism 4 is achieved through a tensioning seat and a tensioning member, and the tensioning member can be, for example, a tensioning spring, and its two ends are respectively connected to the sleeve member and the tensioning seat to maintain the tight fit between the flexible wheel portion and the reel mechanism 4. In addition, the tensioning seat is further extended to form a frame, and part of the sleeve member is confined in the frame and can slide along the frame, thus ensuring that the sleeve member remains stable during the rotation of the wheel member 5 and in the tensioned state of the tensioning spring.

[0059] Based on the test components described above, the method for testing the maneuverability of the entire construction machinery will be described in detail below.

[0060] In the embodiment, the operating handle 1 includes multiple operating positions, that is, the multiple operating positions may include a neutral position, a first start position, and a second start position. The motion state of the reel mechanism 4 has multiple motion states corresponding to the multiple operating positions, that is, the motion state includes a static state, a first speed state, and a second speed state corresponding to the neutral position, the first start position, and the second start position, respectively. On this basis, the engineering machinery whole machine controllability test method includes:

[0061] A picking step, continuously acquiring a displacement signal of the operating handle 1 during a process of switching from a first of a plurality of operating positions to a second of a plurality of operating positions, and continuously acquiring a speed signal of the reel mechanism 4 during a process of switching from one of a plurality of motion states corresponding to the first to another of a plurality of motion states corresponding to the second;

[0062] The analysis step is to place the acquired displacement signal and the acquired speed signal on the same time axis, obtain the time period of the operating position conversion of the operating handle 1 and the time period of the motion state conversion of the drum mechanism 4, determine the time point when the motion state conversion of the drum mechanism 4 is completed according to the speed signal, and calculate the response time of the engineering machinery.

[0063] Specifically, when the operating handle 1 is converted from the neutral position to the first start position, the reel mechanism 4 is converted from the static state to the first speed state, and the analysis step calculates the start response time in the response time, that is, the lag of the time point when the motion state conversion of the reel mechanism 4 is completed relative to the time point when the operating position conversion of the operating handle 1 is completed (the "time point when the motion state conversion is completed" here refers to the time point when the reel mechanism 4 reaches the first speed state after undergoing an acceleration process from the static state, and the "time point when the motion state conversion is completed" mentioned below is similar). Similarly, when the operating handle 1 is converted from the first start position to the neutral position, the reel mechanism 4 is converted from the first speed state to the static state, and the analysis step calculates the stop response time in the response time. When the operating handle 1 is converted from the first start position to the second start position, the reel mechanism 4 is converted from the first speed state to the second speed state, and the analysis step calculates the acceleration response time in the response time, that is, the rotation speed of the reel mechanism 4 in the second speed state is greater than the rotation speed of the reel mechanism 4 in the first speed state.

[0064] In addition, when the operating handle 1 is switched from the neutral position to the first start position, the time point when the reel mechanism 4 starts to accelerate can be obtained on the time axis, and then the displacement signal of the operating handle 1 corresponding to the time point is obtained and defined as the empty stroke signal. Further, the displacement signal when the operating handle 1 is located at the first start position is obtained on the time axis and defined as the total stroke signal. The percentage of the empty stroke signal to the total stroke signal is defined as the empty stroke index.

[0065] In addition, a rope is wound around the outer side of the reel mechanism 4, and within a time range of 0.3 seconds to 1 second, the operation of the operating handle 1 switching from the middle position to the first starting position and then switching back to the middle position is defined as an inching operation. The picking step also includes: obtaining the length of the rope released by the reel mechanism 4 after one inching operation, and the length of the rope at the release position is defined as the inching rope output amount.

[0066] The engineering machinery controllability test method provided in this embodiment displays the displacement of the operating handle 1 and the speed of the reel mechanism 4 on the same time axis through the data acquisition mechanism 7, which greatly meets the data required by the test engineer and the corresponding calculation requirements, and provides real and effective data for product performance. Compared with the traditional stopwatch and level instrument test method, the operation precision and accuracy are greatly improved.

[0067] The above are only preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. All equivalent structural changes made by using the contents of the present application specification and drawings under the innovative concept of the present application, or directly / indirectly applied in other related technical fields are included in the protection scope of the present application.

Claims

1. A method for testing the maneuverability of a complete engineering machinery, for use with an engineering machinery, the engineering machinery comprising: An operating part and an actuator, wherein the operating part can control the movement of the actuator; The operating portion includes a plurality of operating positions, and the motion state of the actuator has a plurality of motion states respectively corresponding to the plurality of operating positions; Characterized in that the engineering machinery whole machine controllability testing method comprises: A picking step, continuously acquiring a displacement signal of the operating portion during a process of switching from a first one of the plurality of operating positions to a second one of the plurality of operating positions, and continuously acquiring a speed signal of the actuator during a process of switching from one of the plurality of motion states corresponding to the first one to another of the plurality of motion states corresponding to the second one; an analysis step, placing the acquired displacement signal and the acquired speed signal on the same time axis, obtaining a time period for the operation position conversion of the operating part and a time period for the motion state conversion of the actuator, determining a time point when the motion state conversion of the actuator is completed according to the speed signal, and calculating a response time of the engineering machinery; The operating position includes a neutral position, a first start position, and a second start position, and the motion state includes a static state, a first speed state, and a second speed state corresponding to the neutral position, the first start position, and the second start position, respectively; When the operating part is switched from the neutral position to the first start position, the actuator is switched from the static state to the first speed state, and the analysis step calculates the start response time in the response time; When the operating part is switched from the first start position to the middle position, the actuator is switched from the first speed state to the static state, and the analysis step calculates the stop response time in the response time; When the operating part is switched from the first start position to the second start position, the actuator is switched from the first speed state to the second speed state, and the analysis step calculates the acceleration response time in the response time; when the operating part is switched from the middle position to the first start position: Acquire the time point when the actuator starts to accelerate on the time axis, and then acquire the displacement signal of the operating part corresponding to the time point and define it as an empty stroke signal; Acquire a displacement signal when the operating part is located at a first start position on the time axis and define the displacement signal as a total stroke signal; The percentage of the empty stroke signal to the total stroke signal is defined as an empty stroke index.

2. The method for testing the maneuverability of a complete construction machinery according to claim 1, characterized in that: The actuator can release the rope when in motion, and within a time range of 0.3 seconds to 1 second, the operation of the operating part completing the switching from the neutral position to the first starting position and then switching back to the neutral position is defined as an inching operation; The picking up step further includes: obtaining the length of the rope released by the actuator after the inching operation once, and the length of the rope at the release point is defined as the inching rope output amount.

3. A testing device, characterized in that: Used to perform the engineering machinery whole machine maneuverability testing method as described in claim 1 or 2.

4. The testing device according to claim 3, characterized in that: The operating unit controls the actuator via a hydraulic system, and the testing device comprises: A displacement pickup mechanism, used to pick up the displacement of the operating part and output a displacement signal; A speed pickup mechanism, used to pick up the speed of the actuator and output a speed signal; A data acquisition mechanism (7) is communicatively connected to both the displacement pickup mechanism and the speed pickup mechanism, so as to receive the displacement signal and the speed signal.

5. The testing device according to claim 4, characterized in that: The engineering machine further comprises an armrest box (8), the armrest box (8) is formed with a mounting surface, the operating portion is formed as an operating handle (1), and the operating handle (1) is mounted on the mounting surface; the displacement pickup mechanism comprises: A support assembly (3) is arranged on the mounting surface; A displacement sensor (2), the displacement sensor (2) being used to pick up the displacement of the operating part so as to transmit the output displacement signal to the data acquisition mechanism (7); A connecting member is used to connect the displacement sensor (2).

6. The testing device according to claim 5, characterized in that: The support assembly (3) comprises a first support member and a second support member connected to each other, the first support member is arranged on the mounting surface, the second support member extends toward the operating handle (1), and the displacement sensor (2) is mounted on the second support member; The coupling member is formed as a flexible cable, and when the operating handle (1) is in a neutral position, the flexible cable is parallel to the mounting surface.

7. The testing device according to claim 5, characterized in that: The actuator is formed as a reel mechanism (4), and the speed pickup mechanism further comprises: A synchronization component, which forms a close fit with the reel mechanism (4) so ​​as to be linked with the reel mechanism (4); A speed sensor is arranged on the synchronization component and is used to obtain the rotation speed of the synchronization component so as to transmit the speed signal to the data acquisition mechanism (7).

8. The testing device according to claim 7, characterized in that: The synchronization component includes: A wheel member (5) comprising a flexible wheel portion whose outer portion is tightly matched with the outer portion of the reel mechanism (4), and a shaft portion which is partially accommodated in the sleeve member and can rotate relative to the sleeve member; A tensioning seat and a tensioning member, wherein two ends of the tensioning member are respectively connected to the sleeve member and the tensioning seat to maintain a close fit between the flexible wheel portion and the reel mechanism (4); The speed sensor is formed as an encoder (6) arranged on the shaft portion; A DC transmitter is provided between the data acquisition mechanism (7) and the displacement pickup mechanism, and between the data acquisition mechanism (7) and the speed pickup mechanism.

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