A double-wave impact machine and its control method

Abstract

The present invention provides a dual-wave impact machine and a control method thereof, which relate to the field of mechanical technology. In the dual-wave impact machine provided by the present invention, a control module is used to send a first impact signal to a first impact module and a second impact signal to a second impact module; the first impact module is used to output impact gas to the object to be tested after receiving the first impact signal to perform a negative wave impact; the second impact module is used to output a positive wave impact to the object to be tested after receiving the second impact signal; the data acquisition module is communicatively connected to the control module, and is used to collect impact data received by the object to be tested, and send the impact data to the control module; the control module is also used to determine the impact spectrum based on the impact data. The dual-wave impact machine provided by the present invention speeds up the energy storage speed of each impact. In addition, by controlling the pressure of the impact gas, the waveform of the negative wave impact can be controlled relatively simply, so that the acceleration and pulse width of each negative wave impact can be accurately controlled.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanics, and in particular to a double-wave impact machine and a control method thereof. Background Art

[0002] Ships at sea are subject to non-contact explosions from weapons such as torpedoes and underwater bombs. This explosive energy, propagating through the water medium, produces a complex series of impact loads on the ship, including shock waves and bubble pulsations. Currently, most impact machines simulate instantaneous positive shock waves. However, in reality, equipment on underwater ships experiences dual-wave shocks, including positive and negative waves, when subjected to non-contact explosions. Consequently, navies worldwide have proposed dual-wave shock standards to replace traditional single-wave shock simulations.

[0003] Currently, the control systems and methods that can achieve dual-wave functions in existing technologies have defects. For example, the use of hydraulics to generate negative wave curves makes it very difficult to adjust the negative wave parameters due to the characteristics of the hydraulic medium. The hydraulic control and energy storage are relatively long, resulting in a longer operating time for each impact. At the same time, it is difficult to meet the technical requirements of the existing military standards. Summary of the Invention

[0004] Embodiments of the present invention provide a dual-wave impactor that generates negative-wave impacts using impact gas. The impact gas quickly reaches the required pressure, accelerating the energy accumulation rate for each impact and avoiding the long energy accumulation time associated with hydraulic impacts. Furthermore, controlling the impact gas pressure allows for simple control of the negative-wave impact waveform, enabling precise control of the acceleration and pulse width of each negative-wave impact, enabling more accurate impact simulation and resulting in more precise and accurate impact data.

[0005] In a first aspect, an embodiment of the present invention provides a dual-wave impact machine, comprising a first impact module, a second impact module, a control module, and a data acquisition module;

[0006] The control module is used to send a first impact signal to the first impact module and send a second impact signal to the second impact module;

[0007] The first impact module is used to output impact gas to the object to be tested after receiving the first impact signal to perform negative wave impact;

[0008] The second impact module is used to output a positive wave impact to the object to be tested after receiving the second impact signal;

[0009] The data acquisition module is in communication with the control module and is used to collect impact data of the object to be tested and send the impact data to the control module; the control module is also used to determine the impact spectrum according to the impact data.

[0010] Optionally, the dual-wave impact machine further comprises an air pump, a first pneumatic valve and a first air pressure sensor, and the air pump is connected to the first impact module through the first pneumatic valve;

[0011] The control module is in communication with the first pneumatic valve and is used to send a first inflation signal to the first pneumatic valve to control the air pump to be connected to the first shock module so that shock gas is pumped into the first shock module;

[0012] The first air pressure sensor is in communication with the control module, and is used to detect the air pressure of the first impact module and send a first stop signal to the control module when the air pressure of the first impact module is greater than or equal to a first preset air pressure;

[0013] The control module is further configured to send a first closing signal to the first pneumatic valve after receiving the first stop signal, so as to control the first pneumatic valve to close.

[0014] Optionally, the second impact module includes an energy storage chamber, an impact chamber and a gas blocking module, wherein the gas blocking module is arranged on the communication path between the energy storage chamber and the impact chamber; the impact chamber includes an impact hammer;

[0015] The accumulator chamber is used to store impact gas;

[0016] The gas blocking module is used to open after receiving the second impact signal, connecting the energy storage chamber and the impact chamber, so that the impact gas drives the impact hammer to perform a positive wave impact on the object to be tested.

[0017] Optionally, the dual-wave impact machine further comprises an air pump, a second pneumatic valve and a second air pressure sensor, the air pump being connected to the energy storage chamber via the second pneumatic valve;

[0018] The control module is in communication with the second pneumatic valve and is used to send a second inflation signal to the second pneumatic valve to control the air pump to be connected to the energy storage chamber and pump the impact gas into the energy storage chamber;

[0019] The second air pressure sensor is in communication with the control module, and is used to detect the air pressure of the energy storage chamber, and send a second stop signal to the control module when the air pressure of the energy storage chamber is greater than or equal to a second preset air pressure;

[0020] The control module is further configured to send a second closing signal to the second pneumatic valve after receiving the second stop signal, so as to control the second pneumatic valve to close.

[0021] Optionally, the gas blocking module includes an ejector pin and an ejector pin cavity;

[0022] The ejector pin is located at the connection point between the energy storage chamber and the impact chamber;

[0023] The ejector pin chamber is used to store gas. When the gas pressure in the ejector pin chamber is greater than a third preset gas pressure, the ejector pin is lifted up, and the energy storage chamber and the impact chamber are isolated.

[0024] The ejector cavity is further configured to open upon receiving a second impact signal to discharge gas in the ejector cavity, so that the air pressure in the ejector cavity is less than or equal to a third preset air pressure.

[0025] Optionally, the double-wave impact machine further comprises an air pump, a third pneumatic valve and a third air pressure sensor, and the air pump is connected to the ejector cavity through the third pneumatic valve;

[0026] The control module is in communication with the third pneumatic valve and is used to send a third inflation signal to the third pneumatic valve to control the air pump to communicate with the ejector cavity and pump the impact gas into the ejector cavity;

[0027] The third air pressure sensor is in communication with the control module and is used to detect the air pressure in the ejector cavity and send a third stop signal to the control module when the air pressure in the ejector cavity is greater than a third preset air pressure;

[0028] The control module is further configured to send a third closing signal to the third pneumatic valve after receiving the third stop signal, so as to control the third pneumatic valve to close.

[0029] Optionally, the dual-wave impact machine further comprises an air pump, a fourth pneumatic valve and a brake module, the brake module comprises a brake chamber and a brake rod, and the air pump is connected to the brake chamber through the fourth pneumatic valve;

[0030] The data acquisition module is also used to send a braking signal to the control module after collecting the positive wave impact data;

[0031] The control module is further configured to send a braking signal to the fourth pneumatic valve after receiving the braking signal, so as to control the gas to enter the braking chamber to push the braking rod to stop the movement of the impact hammer.

[0032] Optionally, the data acquisition module includes an accelerometer;

[0033] The accelerometer is used to measure the acceleration data of the object to be measured, and the impact data includes the acceleration data.

[0034] In a second aspect, an embodiment of the present invention provides a control method for a dual-wave impact machine, which is applicable to the dual-wave impact machine provided by any embodiment of the present invention. The control method includes:

[0035] sending a second shock signal to the second shock module, so that the second shock module outputs a positive wave shock to the object to be tested according to the second shock signal;

[0036] sending a first shock signal to the first shock module, so that the first shock module outputs shock gas to the object to be tested according to the first shock signal to perform negative wave shock;

[0037] The control data acquisition module collects the impact data of the object to be tested and determines the impact spectrum according to the impact data.

[0038] Optionally, the dual-wave impact machine further comprises an air pump, a first pneumatic valve, a second pneumatic valve, a third pneumatic valve, a fourth pneumatic valve, a first air pressure sensor, a second air pressure sensor, a third air pressure sensor, a fourth air pressure sensor and a brake module, wherein the brake module comprises a brake chamber and a brake rod;

[0039] The second impact module includes an energy storage chamber, an impact chamber, and a gas blocking module, wherein the gas blocking module is arranged on the communication path between the energy storage chamber and the impact chamber; the impact chamber includes an impact hammer; the gas blocking module includes an ejector pin and an ejector pin chamber, wherein the ejector pin is located at the communication point between the energy storage chamber and the impact chamber;

[0040] The air pump is connected to the first impact module through the first pneumatic valve, is connected to the energy storage chamber through the second pneumatic valve, is connected to the ejector chamber through the third pneumatic valve, and is connected to the brake chamber through the fourth pneumatic valve;

[0041] Before sending the second impact signal to the second impact module, the method further includes:

[0042] sending a third inflation signal to the third pneumatic valve to control the air pump to communicate with the ejector cavity and pump impact gas into the ejector cavity; receiving the air pressure of the ejector cavity fed back by the third air pressure sensor, and sending a third closing signal to the third pneumatic valve to control the third pneumatic valve to close when the air pressure in the ejector cavity is greater than a third preset air pressure;

[0043] Sending a first inflation signal to the first pneumatic valve to control the air pump to be connected to the first shock module so that shock gas is pumped into the first shock module; receiving the air pressure of the first shock module fed back by the first air pressure sensor, and sending a first closing signal to the first pneumatic valve to control the first pneumatic valve to close when the air pressure of the first shock module is greater than a first preset air pressure;

[0044] sending a second charging signal to the second pneumatic valve to control the air pump to communicate with the energy storage chamber and pump the impact gas into the energy storage chamber; receiving the air pressure of the energy storage chamber fed back by the second air pressure sensor, and sending a second closing signal to the second pneumatic valve to control the second pneumatic valve to close when the air pressure of the energy storage chamber is greater than a second preset air pressure;

[0045] After the control data acquisition module collects the impact data of the object to be tested, it also includes:

[0046] A brake signal is sent to the fourth pneumatic valve to control the gas to enter the brake chamber to push the brake rod to stop the movement of the impact hammer.

[0047] The dual-wave impactor provided by the present invention generates negative-wave impacts through impact gas. The impact gas quickly reaches the required pressure, accelerating the energy accumulation rate for each impact and avoiding the long energy accumulation time associated with hydraulic impacts. Furthermore, controlling the impact gas pressure allows for simple control of the negative-wave impact waveform, enabling precise control of the acceleration and pulse width of each negative-wave impact, achieving more accurate impact simulation and generating more precise and accurate impact data.

[0048] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0050] Figure 1 This is a structural block diagram of a double-wave impact machine provided by an embodiment of the present invention;

[0051] Figure 2 It is a graph showing the acceleration of the object under test changing with time after being impacted;

[0052] Figure 3 It is a curve diagram showing the relationship between the velocity and frequency of the object to be tested after being impacted;

[0053] Figure 4 It is another curve graph showing the acceleration of the object under test changing with time after being impacted;

[0054] Figure 5 It is a curve graph showing the acceleration of the object under test changing with time after it is impacted;

[0055] Figure 6 It is another velocity-frequency relationship curve after the object to be tested is impacted;

[0056] Figure 7 This is a structural block diagram of another double-wave impact machine provided by an embodiment of the present invention;

[0057] Figure 8 This is a structural block diagram of another double-wave impact machine provided by an embodiment of the present invention;

[0058] Figure 9 This is a structural block diagram of another double-wave impact machine provided by an embodiment of the present invention;

[0059] Figure 10 This is a structural block diagram of another double-wave impact machine provided by an embodiment of the present invention;

[0060] Figure 11 This is a structural block diagram of another double-wave impact machine provided by an embodiment of the present invention;

[0061] Figure 12 This is a structural block diagram of another double-wave impact machine provided by an embodiment of the present invention;

[0062] Figure 13 is a flow chart of a control method provided by an embodiment of the present invention;

[0063] Figure 14 is a flow chart of another control method provided by an embodiment of the present invention;

[0064] Figure 15 This is a flow chart of another control method provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0065] In order to enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0066] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0067] The embodiment of the present invention provides a double-wave impact machine, Figure 1 This is a structural diagram of a double-wave impact machine provided by an embodiment of the present invention, with reference to Figure 1The dual-wave impact machine includes a first impact module 100, a second impact module 200, a control module 300 and a data acquisition module 400; the control module 300 is used to send a first impact signal to the first impact module 100 and a second impact signal to the second impact module 200; the first impact module 100 is used to output impact gas to the object to be tested 500 after receiving the first impact signal to perform a negative wave impact; the second impact module 200 is used to output a positive wave impact to the object to be tested 500 after receiving the second impact signal; the data acquisition module 400 is communicatively connected to the control module 300, and is used to collect impact data received by the object to be tested and send the impact data to the control module 300; the control module 300 is also used to determine the impact spectrum based on the impact data.

[0068] Figure 2 It is a graph showing the acceleration of the object under test changing with time after being impacted. Figure 3 It is a curve diagram showing the relationship between the velocity and frequency of the object to be tested after being impacted. Figure 4 It is another curve showing the acceleration of the object under test changing with time after being impacted. Figure 5 It is a curve showing the acceleration of the object under test changing with time after being impacted. Figure 6 This is another curve of the relationship between the speed and frequency after the object to be tested is impacted. Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 When the dual-wave impact machine begins impacting, the control module 300 first activates the second impact module 200, which outputs a positive impact wave to the object 500. Subsequently, the control module 300 activates the first impact module 100, which sprays impact gas to output a negative impact wave to the object 500. By adjusting the impact gas pressure, the acceleration of the object 500 after the negative impact and the pulse width of the negative impact can be controlled. The higher the impact gas pressure, the greater the acceleration of the object 500 after the negative impact, and the longer the pulse width of the negative impact. The acceleration and velocity of the object 500 change when it is subjected to positive and negative impact waves, and the data acquisition module 400 can collect acceleration and velocity data of the object 500.

[0069] The control module 300 analyzes the acceleration and speed data to obtain Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 6 The graph shown. Figure 2 、 Figure 4 and Figure 5The horizontal axis in the graph is time, and the vertical axis is the acceleration of the object 500 to be tested. The positive wave part is the acceleration change caused by the positive wave impact, and the negative wave part is the acceleration change caused by the negative wave impact. It can be seen that the object 500 to be tested is first subjected to the positive wave impact to produce an acceleration greater than 0, and then subjected to the negative wave impact in the other direction. The acceleration of the object 500 to be tested decreases and becomes negative. After the positive wave impact and the negative wave impact end, the acceleration of the object 500 to be tested gradually approaches 0. The control module 300 can Figure 2 The time domain curve in is converted into Figure 3 and Figure 6 The frequency domain curve in Figure 3 and Figure 6 The horizontal axis is the frequency of the object 500 to be measured, and the vertical axis is the speed of the object 500 to be measured. Figure 3 The four curves in the middle represent the impact under different circumstances. Figure 6 The mid-tolerance difference represents the range in which the frequency domain curve of the object to be measured 500 appears.

[0070] The dual-wave impactor provided by the present invention generates negative-wave impacts through impact gas. The impact gas quickly reaches the required pressure, accelerating the energy accumulation rate for each impact and avoiding the long energy accumulation time associated with hydraulic impacts. Furthermore, controlling the impact gas pressure allows for simple control of the negative-wave impact waveform, enabling precise control of the acceleration and pulse width of each negative-wave impact, achieving more accurate impact simulation and generating more precise and accurate impact data.

[0071] Figure 7 This is a structural diagram of another double-wave impact machine provided by an embodiment of the present invention, referring to Figure 7 The double-wave impact machine also includes an air pump 600, a first pneumatic valve 101 and a first air pressure sensor 102. The air pump 600 is connected to the first impact module 100 through the first pneumatic valve 101; the control module 300 is communicatively connected to the first pneumatic valve 101 and is used to send a first inflation signal to the first pneumatic valve 101 to control the air pump 600 to be connected to the first impact module 100, so that the impact gas is pumped into the first impact module 100; the first air pressure sensor 102 is communicatively connected to the control module 300 and is used to detect the air pressure of the first impact module 100 and send a first stop signal to the control module 300 when the air pressure of the first impact module 100 is greater than or equal to a first preset air pressure; the control module 300 is also used to send a first closing signal to the first pneumatic valve 101 after receiving the first stop signal to control the first pneumatic valve 101 to close.

[0072] refer to Figure 7When the first shock module 100 needs to be inflated, the control module 300 controls the first pneumatic valve 101 to open, connecting the air pump 600 to the first shock module 100. The first shock module 100 includes a negative wave cavity, and the air pump 600 pumps shock gas into the negative wave cavity. The first preset air pressure is used to determine whether the shock gas pressure in the first shock module 100 is sufficiently high. When the first air pressure sensor 102 detects that the air pressure in the first shock module 100 is greater than or equal to the first preset air pressure, the control module 300 controls the first pneumatic valve 101 to close, disconnecting the air pump 600 from the first shock module 100. The air pump 600 stops inflating the first shock module 100, thereby ensuring that the air pressure in the first shock module 100 remains within a predetermined range.

[0073] Figure 8 This is a structural block diagram of another double-wave impact machine provided by an embodiment of the present invention, refer to Figure 8 The second impact module 200 includes an energy storage chamber 201, an impact chamber 202 and a gas blocking module 203. The gas blocking module 203 is arranged on the communication path between the energy storage chamber 201 and the impact chamber 202; the impact chamber 202 includes an impact hammer 204; the energy storage chamber 201 is used to store impact gas; the gas blocking module 203 is used to open after receiving the second impact signal, connecting the energy storage chamber 201 and the impact chamber 202, so that the impact gas drives the impact hammer 204 to perform a positive wave impact on the object to be measured 500.

[0074] refer to Figure 8 When performing a positive wave impact, the control module 300 controls the gas blocking module 203 to open, connecting the energy storage chamber 201 and the impact chamber 202. The impact gas in the energy storage chamber 201 enters the impact chamber 202, pushing the impact hammer 204. The speed of the impact hammer 204 increases, so that the impact hammer 204 performs a positive wave impact on the object to be tested 500, simulating the positive wave impact when the object to be tested 500 is subjected to an explosion attack. The impact gas is stored in the energy storage chamber 201 before the impact is performed, which can shorten the preparation time for the dual-wave impact machine to output a positive wave impact. Optionally, the dual-wave impact machine also includes an impact transmitter, and the impact hammer 204 directly performs a positive wave impact on the impact transmitter. The impact transmitter can transmit the positive wave impact to the object to be tested 500, thereby preventing the object to be tested 500 from directly contacting the impact hammer 204 and being damaged by the collision.

[0075] Optionally, the dual-wave impact machine further includes a position detection module configured to detect the position of the impact hammer. Prior to inflating the energy storage chamber, the position detection module detects the position of the impact hammer. If the impact hammer is in the initial position, the control module controls the air pump to begin inflating the energy storage chamber. If the impact hammer is not in the initial position, the control module first moves the impact hammer to the initial position before inflating the energy storage chamber. The initial position is the position the impact hammer should be in when preparing to impact.

[0076] Figure 9 This is a structural block diagram of another double-wave impact machine provided by an embodiment of the present invention, refer to Figure 9 The dual-wave impact machine also includes an air pump 600, a second pneumatic valve 205, and a second air pressure sensor 206. The air pump 600 is connected to the energy storage chamber 201 through the second pneumatic valve 205; the control module 300 is communicatively connected to the second pneumatic valve 205 and is used to send a second inflation signal to the second pneumatic valve 205 to control the air pump 600 to be connected to the energy storage chamber 201 and pump impact gas into the energy storage chamber 201; the second air pressure sensor 206 is communicatively connected to the control module 300 and is used to detect the air pressure of the energy storage chamber 201 and send a second stop signal to the control module 300 when the air pressure of the energy storage chamber 201 is greater than or equal to a second preset air pressure; the control module 300 is further used to send a second closing signal to the second pneumatic valve 205 after receiving the second stop signal to control the second pneumatic valve 205 to close.

[0077] refer to Figure 9 When the second shock module 200 needs to be inflated, the control module 300 controls the second pneumatic valve 205 to open, connecting the air pump 600 to the second shock module 200. The air pump 600 then pumps shock gas into the second shock module 200. The second preset air pressure is used to determine whether the shock gas pressure in the second shock module 200 is sufficiently high. When the second air pressure sensor 206 detects that the air pressure in the second shock module 200 is greater than or equal to the second preset air pressure, the control module 300 controls the second pneumatic valve 205 to close, disconnecting the air pump 600 from the second shock module 200. The air pump 600 then stops inflating the second shock module 200, thereby ensuring that the air pressure in the second shock module 200 remains within a predetermined range.

[0078] Figure 10 This is a structural block diagram of another double-wave impact machine provided by an embodiment of the present invention, refer to Figure 10 The gas blocking module 203 includes a pin 207 and a pin cavity 208; the pin 207 is located at the connection point between the energy storage chamber 201 and the impact chamber 202; the pin cavity 208 is used to store gas. When the air pressure in the pin cavity 208 is greater than the third preset air pressure, the pin 207 is pushed up, and the energy storage chamber 201 and the impact chamber 202 are isolated; the pin cavity 208 is also used to open when receiving the second impact signal to discharge the gas in the pin cavity 208, so that the air pressure in the pin cavity 208 is less than or equal to the third preset air pressure.

[0079] refer to Figure 10The third preset air pressure is used to determine whether ejector pin 207 is lifted. When the dual-wave impact machine is preparing to perform a positive-wave impact, air pump 600 pumps air into ejector pin chamber 208, causing the air pressure in ejector pin chamber 208 to exceed the third preset air pressure. This causes ejector pin 207 to lift, blocking the connection between energy storage chamber 201 and impact chamber 202. At this time, the impact gas in energy storage chamber 201 does not enter impact chamber 202. When the dual-wave impact machine determines to perform a positive-wave impact, control module 300 controls ejector pin chamber 208 to vent air. When the air pressure in ejector pin chamber 208 is less than or equal to the third preset air pressure, ejector pin 207 drops, connecting energy storage chamber 201 and impact chamber 202. The impact gas accumulated in energy storage chamber 201 enters impact chamber 202, driving impact hammer 204 to perform a positive-wave impact. By controlling the ejector pin 207 , the air pressure in the energy storage chamber 201 can be controlled, thereby controlling the strength of the positive wave impact.

[0080] Figure 11 This is a structural block diagram of another double-wave impact machine provided by an embodiment of the present invention, refer to Figure 11 The dual-wave impact machine further includes an air pump 600, a third pneumatic valve 209, and a third air pressure sensor 210. The air pump 600 is connected to the ejector cavity 208 through the third pneumatic valve 209. The control module 300 is communicatively connected to the third pneumatic valve 209 and is configured to send a third inflation signal to the third pneumatic valve 209 to control the air pump 600 to communicate with the ejector cavity 208 and pump impact gas into the ejector cavity 208. The third air pressure sensor 210 is communicatively connected to the control module 300 and is configured to detect the air pressure in the ejector cavity 208 and send a third stop signal to the control module 300 when the air pressure in the ejector cavity 208 is greater than a third preset air pressure. The control module 300 is further configured to send a third closing signal to the third pneumatic valve 209 upon receiving the third stop signal to control the closing of the third pneumatic valve 209.

[0081] refer to Figure 11 When the dual-wave impactor is ready to perform positive-wave impact, the control module 300 controls the third pneumatic valve 209 to open, connecting the air pump 600 to the ejector cavity 208. The air pump 600 then pumps impact gas into the ejector cavity 208. When the third air pressure sensor 210 detects that the air pressure in the ejector cavity 208 is greater than a third preset air pressure, the control module 300 controls the third pneumatic valve 209 to close, disconnecting the air pump 600 from the ejector cavity 208. The air pump 600 then stops pumping air into the ejector cavity 208, thereby ensuring that the air pressure in the ejector cavity 208 remains within a predetermined range.

[0082] Figure 12 This is a structural block diagram of another double-wave impact machine provided by an embodiment of the present invention, refer to Figure 12The dual-wave impact machine also includes an air pump 600, a fourth pneumatic valve and a brake module. The brake module includes a brake chamber and a brake rod. The air pump 600 is connected to the brake chamber through the fourth pneumatic valve; the data acquisition module 400 is also used to send a brake signal to the control module 300 after collecting the positive wave impact data; the control module 300 is also used to send a brake signal to the fourth pneumatic valve after receiving the brake signal, so as to control the gas to enter the brake chamber and push the brake rod to stop the movement of the impact hammer 204.

[0083] refer to Figure 12 After the hammer 204 delivers a positive wave impact to the object 500, the control module 300 controls the fourth pneumatic valve to open, allowing air to enter the brake chamber and push the brake lever. This brake lever stops the hammer 204, preventing the hammer 204 from rebounding and causing the data acquisition module 400 to collect unnecessary data. The brake lever can stop the hammer 204 after the data acquisition module 400 collects the positive wave impact data. Alternatively, the brake lever can be configured to stop the hammer 204 a fixed time after the positive wave impact begins.

[0084] Optionally, the data acquisition module includes an accelerometer; the accelerometer is used to measure acceleration data of the object to be measured, and the impact data includes acceleration data. The accelerometer is fixed to the surface of the object to be measured and can measure the acceleration of the object to be measured after being impacted. The control module can determine a time domain curve of acceleration and a frequency domain curve of velocity based on the acceleration data.

[0085] Based on the same inventive concept, an embodiment of the present invention provides a control method for a dual-wave impact machine, which is applicable to the dual-wave impact machine provided by any embodiment of the present invention. Figure 13 This is a flow chart of a control method provided by an embodiment of the present invention, refer to Figure 13 , control methods include:

[0086] S101 : Sending a second shock signal to a second shock module, so that the second shock module outputs a positive wave shock to an object to be tested according to the second shock signal.

[0087] Specifically, when the object to be tested is subjected to the impact of the explosion, it is first subjected to the positive wave impact and then the negative wave impact. Therefore, the control module first sends a second impact signal to the second impact module, so that the second impact module outputs a positive wave impact to the object to be tested according to the second impact signal, and then sends a first impact signal to the first impact module, so that the first impact module outputs impact gas to the object to be tested according to the first impact signal to perform a negative wave impact.

[0088] S102 : Sending a first shock signal to a first shock module, so that the first shock module outputs shock gas to the object to be tested according to the first shock signal to perform a negative wave shock.

[0089] Specifically, the first impact module injects a negative impact wave at the object under test by injecting impact gas. By adjusting the impact gas pressure, the acceleration of the object under test and the pulse width of the negative impact wave can be controlled. The higher the impact gas pressure, the greater the acceleration of the object under test and the longer the pulse width of the negative impact wave.

[0090] S103 : Control the data acquisition module to acquire the impact data of the object to be measured, and determine the impact spectrum according to the impact data.

[0091] Specifically, the control module can determine the change of the acceleration of the object to be measured over time according to the impact data, thereby obtaining the change of the speed of the object to be measured and the speed frequency domain curve of the object to be measured.

[0092] The control method provided by the embodiment of the present invention generates a negative wave shock through the shock gas, and the shock gas can quickly reach the air pressure required for the shock within the second shock pulse width, thereby accelerating the energy storage speed of each shock and avoiding the problem of long energy storage time caused by using hydraulic shock.

[0093] Optionally, the dual-wave impact machine also includes an air pump, a first pneumatic valve, a second pneumatic valve, a third pneumatic valve, a fourth pneumatic valve, a first air pressure sensor, a second air pressure sensor, a third air pressure sensor, a fourth air pressure sensor and a braking module, the braking module includes a braking chamber and a brake rod; the second impact module includes an energy storage chamber, an impact chamber and a gas blocking module, the gas blocking module is arranged on the communication path between the energy storage chamber and the impact chamber; the impact chamber includes an impact hammer; the gas blocking module includes a pin and a pin chamber, the pin is located at the connection point between the energy storage chamber and the impact chamber; the air pump is connected to the first impact module through the first pneumatic valve, connected to the energy storage chamber through the second pneumatic valve, connected to the pin chamber through the third pneumatic valve, and connected to the brake chamber through the fourth pneumatic valve.

[0094] Figure 14 This is a flow chart of another control method provided by an embodiment of the present invention. The control method provided by an embodiment of the present invention further explains how to control the air pump to inflate the ejector cavity, the first impact module and the second impact module based on the previous embodiment. Figure 14 , control methods include:

[0095] S201: Send a third inflation signal to the third pneumatic valve to control the air pump to communicate with the ejector cavity and pump impact gas into the ejector cavity; and receive the air pressure of the ejector cavity fed back by the third air pressure sensor. When the air pressure in the ejector cavity is greater than a third preset air pressure, send a third closing signal to the third pneumatic valve to control the third pneumatic valve to close.

[0096] Specifically, when the dual-wave impact machine is preparing to impact, the connection between the energy storage chamber and the impact chamber should be cut off first, allowing the energy storage chamber to accumulate sufficient impact gas to propel the impact hammer. When the air pressure in the ejector chamber exceeds the third preset air pressure, the ejector is pushed up, thereby blocking the connection between the energy storage chamber and the impact chamber.

[0097] S202. Send a first inflation signal to the first pneumatic valve to control the air pump to be connected to the first shock module so that shock gas is pumped into the first shock module; and receive the air pressure of the first shock module fed back by the first air pressure sensor, and when the air pressure of the first shock module is greater than the first preset air pressure, send a first closing signal to the first pneumatic valve to control the first pneumatic valve to close.

[0098] Specifically, the impact gas in the first impact module is used to perform negative wave impact on the object to be measured, so the gas pressure in the first impact module needs to be large enough to achieve negative wave impact.

[0099] S203: Send a second inflation signal to the second pneumatic valve to control the air pump to be connected to the energy storage chamber and pump the impact gas into the energy storage chamber; and receive the air pressure of the energy storage chamber fed back by the second air pressure sensor, and when the air pressure of the energy storage chamber is greater than the second preset air pressure, send a second closing signal to the second pneumatic valve to control the second pneumatic valve to close.

[0100] Specifically, after the connection between the energy storage chamber and the impact chamber is severed, the impact gas in the energy storage chamber will not leak into the impact chamber. At this point, impact gas can be pumped into the energy storage chamber to raise the pressure in the energy storage chamber above the first preset pressure. It will be appreciated that there is no fixed order between sending the first inflation signal to the first pneumatic valve and sending the second inflation signal to the second pneumatic valve; S202 and S203 can be performed simultaneously or sequentially.

[0101] S204 : Sending a second shock signal to the second shock module, so that the second shock module outputs a positive wave shock to the object to be measured according to the second shock signal.

[0102] S205 : Sending a first shock signal to the first shock module, so that the first shock module outputs shock gas to the object to be tested according to the first shock signal to perform negative wave shock.

[0103] S206 , controlling the data acquisition module to acquire impact data of the object to be measured, and determining the impact spectrum according to the impact data.

[0104] The control method provided by the embodiments of the present invention ensures that sufficient impact gas is stored in the first and second impact modules to achieve both positive and negative impact waves. Furthermore, the ejector pin enables the second impact module to store the impact gas in the energy storage chamber, achieving sufficiently high acceleration for the impact hammer during positive impact waves.

[0105] Figure 15 This is a flow chart of another control method provided by an embodiment of the present invention. The control method provided by an embodiment of the present invention further explains how to stop the impact hammer based on the previous embodiment. Figure 15 , control methods include:

[0106] S301: Send a third inflation signal to the third pneumatic valve to control the air pump to communicate with the ejector cavity and pump impact gas into the ejector cavity; and receive the air pressure of the ejector cavity fed back by the third air pressure sensor. When the air pressure in the ejector cavity is greater than a third preset air pressure, send a third closing signal to the third pneumatic valve to control the third pneumatic valve to close.

[0107] S302. Send a first inflation signal to the first pneumatic valve to control the air pump to be connected to the first shock module so that shock gas is pumped into the first shock module; and receive the air pressure of the first shock module fed back by the first air pressure sensor, and when the air pressure of the first shock module is greater than the first preset air pressure, send a first closing signal to the first pneumatic valve to control the first pneumatic valve to close.

[0108] S303: Send a second inflation signal to the second pneumatic valve to control the air pump to be connected to the energy storage chamber and pump the impact gas into the energy storage chamber; and receive the air pressure of the energy storage chamber fed back by the second air pressure sensor, and when the air pressure of the energy storage chamber is greater than the second preset air pressure, send a second closing signal to the second pneumatic valve to control the second pneumatic valve to close.

[0109] S304 : Sending a second shock signal to the second shock module, so that the second shock module outputs a positive wave shock to the object to be measured according to the second shock signal.

[0110] S305 : Sending a first shock signal to the first shock module, so that the first shock module outputs shock gas to the object to be tested according to the first shock signal to perform negative wave shock.

[0111] S306 , controlling the data acquisition module to acquire impact data of the object to be measured, and determining the impact spectrum according to the impact data.

[0112] S307: Send a braking signal to the fourth pneumatic valve to control the gas to enter the braking chamber to push the braking rod to stop the movement of the impact hammer.

[0113] Specifically, after the control data acquisition module collects the impact data of the object to be measured, it indicates that the impact hammer has performed a positive wave impact on the object to be measured. The control module sends a braking signal to the fourth pneumatic valve, and the air pump pumps gas into the brake chamber. The gas pushes the brake rod, and the brake rod can squeeze the impact hammer, thereby stopping the impact hammer and preventing the impact hammer from rebounding and impacting the object to be measured a second time.

[0114] According to the control method provided by the embodiment of the present invention, after the impact hammer completes the positive wave impact, the brake rod can stop the impact hammer to prevent the impact hammer from rebounding and then impacting the object to be tested a second time, thereby avoiding the loss of the impact hammer and preventing the data acquisition module from collecting redundant data.

[0115] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A double wave impact machine, characterized in that: It includes a first impact module, a second impact module, a control module and a data acquisition module; The control module is configured to send a first impact signal to the first impact module and a second impact signal to the second impact module; The first impact module is used to output impact gas to the object to be tested after receiving the first impact signal to perform negative wave impact; The second impact module is used to output a positive wave impact to the object to be tested after receiving the second impact signal; The data acquisition module is in communication with the control module and is used to collect impact data of the object to be tested and send the impact data to the control module; the control module is also used to determine the impact spectrum according to the impact data; The second impact module includes a gas blocking module; the gas blocking module includes an ejector cavity; The double-wave impact machine further includes an air pump, a third pneumatic valve and a third air pressure sensor, wherein the air pump is connected to the ejector cavity through the third pneumatic valve; The control module is in communication with the third pneumatic valve and is configured to send a third inflation signal to the third pneumatic valve to control the air pump to be connected to the ejector cavity and pump the impact gas into the ejector cavity; The third air pressure sensor is in communication with the control module, and is used to detect the air pressure in the ejector cavity, and send a third stop signal to the control module when the air pressure in the ejector cavity is greater than a third preset air pressure; The control module is further configured to send a third closing signal to the third pneumatic valve after receiving the third stop signal, so as to control the third pneumatic valve to close.

2. The double wave impact machine according to claim 1, characterized in that: The dual-wave impact machine further includes an air pump, a first pneumatic valve and a first air pressure sensor, wherein the air pump is connected to the first impact module through the first pneumatic valve; The control module is in communication with the first pneumatic valve and is configured to send a first inflation signal to the first pneumatic valve to control the air pump to be connected to the first shock module so that the shock gas is pumped into the first shock module; The first air pressure sensor is in communication with the control module, and is used to detect the air pressure of the first impact module, and send a first stop signal to the control module when the air pressure of the first impact module is greater than or equal to a first preset air pressure; The control module is further configured to send a first closing signal to the first pneumatic valve after receiving the first stop signal, so as to control the first pneumatic valve to close.

3. The double wave impact machine according to claim 1, characterized in that: The second impact module includes an energy storage chamber and an impact chamber, and the gas blocking module is arranged on the communication path between the energy storage chamber and the impact chamber; the impact chamber includes an impact hammer; The energy storage chamber is used to store the impact gas; The gas blocking module is configured to open after receiving the second impact signal, connecting the energy storage chamber and the impact chamber, so that the impact gas drives the impact hammer to perform a positive wave impact on the object to be tested.

4. The double wave impact machine according to claim 3, characterized in that: The dual-wave impact machine further includes an air pump, a second pneumatic valve and a second air pressure sensor, wherein the air pump is connected to the energy storage chamber through the second pneumatic valve; The control module is in communication with the second pneumatic valve and is configured to send a second inflation signal to the second pneumatic valve to control the air pump to be connected to the energy storage chamber and pump the impact gas into the energy storage chamber; The second air pressure sensor is in communication with the control module, and is used to detect the air pressure of the energy storage chamber, and send a second stop signal to the control module when the air pressure of the energy storage chamber is greater than or equal to a second preset air pressure; The control module is further configured to send a second closing signal to the second pneumatic valve after receiving the second stop signal, so as to control the second pneumatic valve to close.

5. The double wave impact machine according to claim 3, characterized in that: The gas blocking module includes a ejector pin; the ejector pin is located at the connection point between the energy storage chamber and the impact chamber; The ejector cavity is used to store gas. When the gas pressure in the ejector cavity is greater than a third preset pressure, the ejector is lifted up, and the energy storage cavity and the impact cavity are isolated. The ejector cavity is further configured to open upon receiving the second impact signal, and discharge the gas in the ejector cavity so that the air pressure in the ejector cavity is less than or equal to a third preset air pressure.

6. The double wave impact machine according to claim 3, characterized in that: The dual-wave impact machine further includes an air pump, a fourth pneumatic valve and a brake module, the brake module includes a brake chamber and a brake rod, and the air pump is connected to the brake chamber through the fourth pneumatic valve; The data acquisition module is further configured to send a braking signal to the control module after acquiring the positive wave impact data; The control module is further configured to send the braking signal to the fourth pneumatic valve after receiving the braking signal, so as to control gas to enter the braking chamber to push the braking rod, thereby stopping the movement of the impact hammer.

7. The double wave impact machine according to claim 1, characterized in that: The data acquisition module includes an accelerometer; The accelerometer is used to measure acceleration data of the object to be measured, and the impact data includes the acceleration data.

8. A control method of a double-wave impact machine, characterized in that: The dual-wave impact machine according to any one of claims 1 to 7, further comprising an air pump, a third pneumatic valve, and a third air pressure sensor; the second impact module comprises a gas blocking module; the gas blocking module comprises an ejector cavity; the air pump is connected to the ejector cavity via the third pneumatic valve; The control method includes: sending a second shock signal to the second shock module, so that the second shock module outputs a positive wave shock to the object to be tested according to the second shock signal; sending a first shock signal to a first shock module, so that the first shock module outputs shock gas to the object to be tested according to the first shock signal to perform a negative wave shock; Controlling the data acquisition module to acquire the impact data of the object to be measured, and determining the impact spectrum according to the impact data; Before sending the second impact signal to the second impact module, the method further includes: A third inflation signal is sent to the third pneumatic valve to control the air pump to be connected to the ejector cavity and pump impact gas into the ejector cavity; and the air pressure of the ejector cavity is fed back by the third air pressure sensor, and when the air pressure in the ejector cavity is greater than a third preset air pressure, a third closing signal is sent to the third pneumatic valve to control the third pneumatic valve to close.

9. The control method according to claim 8, characterized in that: The dual-wave impact machine further comprises a first pneumatic valve, a second pneumatic valve, a fourth pneumatic valve, a first air pressure sensor, a second air pressure sensor, a fourth air pressure sensor and a brake module, wherein the brake module comprises a brake chamber and a brake rod; The second impact module includes an energy storage chamber and an impact chamber, and the gas blocking module is arranged on the communication path between the energy storage chamber and the impact chamber; the impact chamber includes an impact hammer; the gas blocking module includes an ejector pin, and the ejector pin is located at the communication point between the energy storage chamber and the impact chamber; The air pump is connected to the first impact module through the first pneumatic valve, connected to the energy storage chamber through the second pneumatic valve, and connected to the brake chamber through the fourth pneumatic valve; Before sending the second impact signal to the second impact module, the method further includes: sending a first inflation signal to the first pneumatic valve to control the air pump to be connected to the first shock module so that the shock gas is pumped into the first shock module; receiving the air pressure of the first shock module fed back by the first air pressure sensor, and sending a first closing signal to the first pneumatic valve to control the first pneumatic valve to close when the air pressure of the first shock module is greater than a first preset air pressure; sending a second charging signal to the second pneumatic valve to control the air pump to communicate with the energy storage chamber and pump the impact gas into the energy storage chamber; receiving the air pressure of the energy storage chamber fed back by the second air pressure sensor, and sending a second closing signal to the second pneumatic valve to control the second pneumatic valve to close when the air pressure of the energy storage chamber is greater than a second preset air pressure; After controlling the data acquisition module to acquire the impact data of the object to be measured, the method further includes: A braking signal is sent to the fourth pneumatic valve to control gas to enter the braking chamber to push the braking rod to stop the movement of the impact hammer.

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