Load quick release device for realizing step excitation load signal

Abstract

The utility model relates to a quick load release device for realizing step excitation load signals. Comprising a load connecting part, an ejection impact assembly, a shell and a trigger. The shell is provided with an opening for placing a load connecting part; an ejection impact assembly is arranged in the shell and connected with the trigger. The result of releasing or applying the load through the load releasing device can generate a step load loading effect on a tested object. And measuring an output result corresponding to the step load loading of the measured object, wherein the measurement result can be used for evaluating the dynamic performance of the measured object during step signal input. The load quick release device is suitable for dynamic performance test equipment which uses a step load as an input signal to evaluate a tested object by using an existing static uniaxial test device.

Description

Technical Field

[0001] The utility model relates to the field of metrology and testing technology application, and to an auxiliary testing device used in material mechanical property testing or metrology activities. Background Technology

[0002] The response of a structural component to a series of stress and strain changes under a load that varies over time is called the dynamic response of the structural component. Dynamic characteristics are the response features of a measured object to an input quantity that varies over time. For a measured object to accurately reflect the relationship between its output response and the input signal over time, it needs to possess good dynamic characteristics. Good dynamic characteristics are also a measure of the measured object's ability to accurately reproduce changing inputs. Step input is currently the most commonly used dynamic testing method. Its principle is to input a step excitation signal to the system, detect its step response signal, and use the step response to calculate the sensor's dynamic performance indicators. The advantage of this method is its large force range, and step excitation signals are relatively easy to implement in practice. Methods for evaluating the dynamic performance of a measured object typically use a step signal as the input excitation signal and measure the output result to assess the dynamic response capability of the measured object.

[0003] This invention relates to a method for conveniently and quickly applying a load to a test device when the test object is subjected to a uniaxial load. This is achieved by adding a rapid load release device to the test apparatus. The entire load application process creates a standard step load effect on the test object. This device is mainly used to evaluate the dynamic response characteristics of the test object under a step load signal using existing uniaxial static testing equipment. Utility Model Content

[0004] This invention discloses a rapid load release device for realizing step excitation load signals. This device can quickly apply or remove the connection between the load and the structure under test and the load in a single axis direction, and can be applied to dynamic tests using step dynamic signals as excitation sources. It can utilize existing laboratory static testing equipment and, in conjunction with the load release device involved in this invention, generate step loads and use them as step load excitation sources, thereby constructing a set of devices for evaluating the dynamic performance of the object under test using step loads.

[0005] The rapid load release device can impact a load connection structure made of brittle and fragile material, causing it to fracture, thereby quickly severing the load connection between the loading device and the object under test and creating a step load effect on the object. This step load input effect is primarily used as a standard input load signal when evaluating the dynamic performance of the object under test.

[0006] The above functions are achieved by the following technical solutions.

[0007] A rapid load release device for implementing a step excitation load signal includes a load connection component, a projectile impact assembly, a housing, and a trigger. The housing has an opening for housing the load connection component. The projectile impact assembly is disposed inside the housing and connected to the trigger. This device can rapidly apply or remove the connection between the load and the structure under test and a load in a single axis direction.

[0008] Furthermore, the load connection component is the only connection device between the load generated by the test device and the object under test; the load connection component consists of a connection position and a brittle connector.

[0009] Furthermore, the brittle connector has a thin metal conductor embedded inside, and an electrical interface is provided on the outside of the brittle connector. The metal conductor is connected to the electrical interface while remaining insulated from the brittle connector rod.

[0010] Furthermore, the ejection impact assembly includes a compression spring, a hook, a tension spring, an impact hammer, a guide rail, an adjusting spring, a blade striker, a movable blade, and a fixed blade.

[0011] The housing is equipped with a guide rail; the impact hammer is mounted on the guide rail and can move back and forth; both ends of the impact hammer are equipped with tension springs for tightening the impact hammer; the impact hammer presses on the blade holder striker; the blade holder striker is connected to the movable blade; the hook is mounted on the guide rail support at the rear end of the trigger and can rotate around the fixed axis of the hook; the trigger's push rod pushes the hook to rotate around its fixed axis when the trigger is activated; the line of action of the tension force on the force-bearing surface of the hook is between the hook and the guide rail support; the adjusting spring, the blade striker, and the movable blade are connected in sequence; the fixed blade is fixed to the other end of the opening and is opposite to the movable blade.

[0012] Furthermore, the present invention also includes a latch; the latch is disposed on the impact hammer.

[0013] The load connection component of the load quick release device in this utility model is used to connect the object under test and the loading device, and its function is to transfer the load between the loading device and the object under test.

[0014] The connector structure of the load-bearing connection component in this invention is made of a brittle material. This material is prone to brittle fracture under external impact when subjected to the designed static load. Simultaneously, the connector structure is equipped with an internal conductive circuit. When the connector structure fractures, the conductive circuit also breaks. When an external trigger acquisition and control system is used, with appropriate configuration of the external circuitry, the brittle connector can be used as a trigger switch for the acquisition and control system.

[0015] The present invention discloses a load rapid release device with an impact function. The rapid release device can break and fracture the correctly installed connecting parts, thereby cutting off the load transmission between the test object and the test equipment, and forming a step load signal effect on the test object.

[0016] The trigger structure of the load rapid release device in this invention can accept control signals from the test operator or data system to start the load release device to operate.

[0017] In this invention, the ejector impact assembly uses its blade structure to impact the load connection component, causing the load connection component to break. This enables the rapid application or removal of load on the test object, thereby producing the effect of the test device applying a step load to the test object.

[0018] The load rapid release device of this utility model is mainly used in experimental activities that use step load signals as evaluation parameters of the dynamic response of the test object. The function of the load rapid release device is to apply the load generated by the test device to the test object or remove it from the test object in the form of step excitation load.

[0019] Compared with the prior art, the advantages of this utility model are:

[0020] (1) Unlike existing loads that are difficult to control, the feature of this new invention is that it is easy to use existing devices to generate step loads, so as to apply stable and controllable load values ​​and realize repeated loading.

[0021] (2) The load release device of this utility model can conveniently and quickly apply a load to the test object or remove a load from the test object. The result of releasing or applying a load through this load release device will produce a step load loading effect on the test object. The output result of the test object corresponding to this step load loading is measured, and the measurement result can be used to evaluate the dynamic performance of the test object under step signal input. Attached Figure Description

[0022] Figure 1 A schematic diagram of the overall structure and application of a load rapid release device;

[0023] Figure 2 This is a schematic diagram of the debrittle material structure of a load rapid release device;

[0024] Figure 3 This is a schematic diagram of a load rapid release device.

[0025] The components in the diagram are as follows:

[0026] Load connection component 1, ejection impact assembly 2, housing 3, trigger 4, connection point 10, brittle connector 11, metal conductor connection 12, signal interface 13, load quick release device 2, compression spring 20, hook 21, tension spring 22, lever 23, impact hammer 24, guide rail 25, adjusting spring 26, blade striker 27, movable blade 28, fixed blade 29, fixed shaft 210, hook foot 211, support point 213, guide rail support 214. Detailed Implementation

[0027] The present invention will be further described in conjunction with the accompanying drawings and embodiments.

[0028] like Figure 1 As shown in the figure, this embodiment discloses a rapid load release device for realizing a step excitation load signal. It is characterized by comprising a load connection component 1, a projectile impact assembly 2, a housing 3, and a trigger 4. The housing 3 has an opening for placing the load connection component 1. The projectile impact assembly 2 is disposed inside the housing 3 and is connected to the trigger 4. The brittle connector 11 of the load connection component 1 is threaded or expanded and installed between the force source of the test device and the object under test. The movable blade 28 of the release device is engaged with the connection component 1. The control signal of the trigger 4 in the rapid load unloading device is connected to an external measurement and control system. The trigger 4 uses hydraulic, electromagnetic, or other methods as a driving source. The signal interface 13 of the brittle connection component 1 is connected to the signal triggering device of an external data acquisition system.

[0029] like Figure 2 As shown, the load connection component 1 comprises a connection point 10 and a brittle connector 11. The brittle connector 11 contains a thin metal wire 12 and a signal interface 13. The metal conductor wire 12 has a small cross-section, and its overall shape is fishbone-like. The metal wire 12 and the signal interface 13 are insulated from the brittle connector 11. The brittle connector 11 is made of mineral materials, glass, ceramics, metal oxides, or other brittle materials, which are prone to brittle fracture under external impact loads. The two ends of the load connection component 1 are respectively connected to the load loading connection device and the object under test.

[0030] like Figure 3As shown, the load quick release device 2 comprises a latch 23, a guide rail 25, a hook 21, an impact hammer 24, a movable blade 28, a fixed blade 29, a blade impact pin 27, a tension spring 22, a compression spring 20, and an adjusting spring 26. The impact hammer 24 is mounted on the guide rail 25 and can move back and forth. It is tightened by the tension springs 22 mounted on both sides of the impact hammer 24 and presses against the movable blade 28 and the blade impact pin 27. The hook 21 is mounted on the guide rail support 214 at the rear end of the trigger 4 and can rotate around the fixed axis 210 of the hook 21. The push rod 41 of the trigger 4 can push the hook 21 to rotate around its fixed axis 210 when the trigger 4 is triggered. The line of action of the tension force on the force-bearing surface of the hook foot 211 of the hook 21 is collinear with the fixed axis 210 of the hook 21 and parallel to the line of action of the tension force on the support point 213 of the hook 21. The compression spring 20 is installed between the support point 213 and the guide rail support 22.

[0031] like Figure 3 As shown, the fixed blade 29 of the load quick release device is fixed to the tail of the load quick release device. The blade striker 27 works in conjunction with the movable blade 28. Under the action of the adjusting spring 26, the blade striker 27 can adjust the distance between the fixed blade 29 and the movable blade 28. By adjusting the blade spacing, the load quick release device can be easily locked onto the brittle connector 11.

[0032] Pushing the latch 23 connected to the impact hammer 24 pushes the impact hammer 24 into the hook 21, where it is hooked. This completes the impact preparation action.

[0033] Design a brittle connector 11 with suitable load-bearing capacity, and check the circuit continuity between the signal output interfaces 13 of the brittle connector 11. After checking that the impact hammer 4 of the tripping device can operate normally and that the movable blade 28 can move freely, install the entire load device onto the test device of the object under test.

[0034] Based on the trigger signal characteristics of the external signal acquisition device, the brittle connector 11 is connected in series to the signal acquisition device circuit. The trigger 4 signal is connected to the test control system of the test device for the object under test. After completing the above operations, the impact hammer 24 of the load device is pushed forward by the lever 23 and hooked by the hook 21.

[0035] A load is normally applied to the test object up to the design load-bearing capacity of the brittle connector 11. While maintaining the load, the signal acquisition instrument at the output end of the test object is activated, and a trigger signal is applied to activate trigger 4. Trigger 4 actuates, pushing hook 21 and releasing impact hammer 24. Under the action of tension spring 25, impact hammer 24 impacts the cutting head pin 27, striking the movable cutting edge 28. The movable cutting edge 28 impacts the brittle connector 11, creating micro-cracks. The brittle connector 11 with these cracks then fractures under the external load. The load correlation between the test object and the testing device disappears instantaneously, thus forming an effective step load signal on the test object.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for rapidly releasing a load when realizing a step excitation load signal, characterized in that, It includes a load connection component (1), a projectile impact assembly (2), a housing (3), and a trigger (4); the housing (3) is provided with an opening for placing the load connection component (1); the projectile impact assembly (2) is provided inside the housing (3), and the projectile impact assembly (2) is connected to the trigger (4).

2. The load rapid release device for realizing a step excitation load signal according to claim 1, characterized in that, The load connection component (1) is the only connection device between the load generated by the connection test device and the test object; the load connection component (1) consists of a connection position (10) and a brittle connector (11).

3. The load rapid release device for realizing a step excitation load signal according to claim 2, characterized in that, The brittle connector (11) has a thin metal conductor (12) embedded inside, and an electrical interface (13) is left outside the brittle connector (11). The metal conductor (12) is connected to the electrical interface (13) while maintaining insulation from the brittle connector rod.

4. The load rapid release device for realizing a step excitation load signal according to claim 1, characterized in that, The ejection impact assembly (2) includes a compression spring (20), a hook (21), a tension spring (22), an impact hammer (24), a guide rail (25), an adjustment spring (26), a blade striker (27), a movable blade (28), and a fixed blade (29). The housing (3) is provided with a guide rail (25); the impact hammer (24) is mounted on the guide rail (25), and tension springs (22) for tightening the impact hammer (24) are installed on both ends of the impact hammer (24). The impact hammer (24) presses on the blade edge striker (27); the blade edge striker (27) is connected to the movable blade (28); the hook (21) is mounted on the guide rail support (214) at the rear end of the trigger (4); the hook ( The line of action of the tension force on the force-bearing surface of the hook foot (211) of 21) is collinear with the mounting and fixing axis (210) of the hook (21) and parallel to the line of action of the hook (21); the compression spring (20) is installed between the support point (213) and the guide rail support (214); the adjusting spring (26), the blade striker (27) and the movable blade (28) are connected in sequence; the fixed blade (29) is fixed at the other end of the opening and is opposite to the movable blade (28).

5. The load rapid release device for realizing a step excitation load signal according to claim 4, characterized in that, It also includes a latch (23); the latch (23) is disposed on the impact hammer (24).

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