Wireless measurement method for high-g-value acceleration in collision process

Abstract

The invention belongs to the technical field of impact resistance, and discloses a wireless measurement method for high-g-value acceleration in a collision process. The method comprises the steps of installing a sensor and a matched circuit; installing a transmitter and a transmitting antenna; carrying out anti-overload potting reinforcement on the circuit module; configuring a wireless receiving device of the impact data; and carrying out acceleration data analysis processing. According to the method, a high-overload-resistant wireless transmission measuring device is installed on a test model, wireless measurement of acceleration data in the collision process is achieved, and the problem of measurement of high-g-value acceleration data in events such as high-speed collision and explosion is solved. According to the method, a wireless transmission mode is utilized, measurement recording equipment does not need to be recycled, the problem that a signal transmission line is difficult to install on a high-speed moving object is solved, and the method is particularly suitable for occasions where tens of thousands of g high acceleration peak values are generated at high collision speed and wired transmission of measurement data is difficult to achieve and has engineering practical value.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of impact resistance, and particularly relates to a wireless measurement method of high-g value acceleration in a collision process. BACKGROUND

[0002] In events such as explosion and impact, high acceleration values generated will cause the device to fail, be damaged or even disintegrated if the acceleration values exceed the bearing limit of the device. Therefore, it is of great value to analyze and evaluate the anti-impact overload performance of the device to be measured by measuring the acceleration data that the device to be measured can bear in such events. In addition, it is also of great guiding significance to correct the numerical simulation algorithm or test model of such events by measuring the acceleration history data generated in such events.

[0003] Currently, the measurement methods of acceleration and other parameters in such events mainly include two types: one is a measurement method using data recovery reading, such as a plane black box; the other is a measurement method using data wired transmission, such as a signal transmission line connecting the sensor and the data processing device in the explosion and impact ground test. The first type of measurement method requires the device itself to have good anti-impact acceleration capability when the collision speed is high (such as hundreds of meters per second or even higher), otherwise it is difficult to obtain effective measurement data. In the second type of measurement method, a signal transmission line including a connecting cable is used for sensor measurement information transmission, but in the explosion and impact environment, the shock wave and explosion splashes generated are easy to damage the signal transmission line, resulting in test failure. In addition, in the collision events of moving objects, especially high-speed moving objects (such as aircraft, projectile, etc.), it is often difficult to install a signal transmission line on the high-speed moving object, and the wired method is used to measure the parameters.

[0004] At present, it is urgent to develop a wireless measurement method of high-g value acceleration in a collision process. SUMMARY

[0005] The technical problem to be solved by the present application is to provide a wireless measurement method of high-g value acceleration in a collision process to overcome the defects of the prior art.

[0006] The wireless measurement method of high-g value acceleration in a collision process of the present application comprises the following steps: S10. Installing a sensor and a matching circuit; Placing an acceleration sensor in the inner cavity of the test model, and matching a signal conditioning module, a sampling and recording module and a power supply module; S20. Installing a transmitter and a transmitting antenna; A transmitter is placed inside the test model. The transmitter includes a wireless transmission module for acquiring acceleration sensor data and a modulation circuit. Several transmitting antennas are installed on the surface of the test model, arranged in a centrally symmetrical manner. S30. Overload-resistant potting reinforcement of circuit modules; After debugging and confirming that each module is functioning normally, the signal conditioning module, acquisition and recording module, power supply module, wireless transmission module, and modulation circuit in the inner cavity of the test model are bundled together to form a circuit module. The circuit module is placed inside a titanium alloy shell, and epoxy resin is injected into the titanium alloy shell for primary potting. Then, the titanium alloy shell is placed on the central axis of the inner cavity of the test model, and polyurethane material is filled into the gaps in the inner cavity of the test model for secondary potting. The test model is then sealed, and the test model fabrication is complete. Encapsulation reinforcement enhances the overload resistance of circuit modules, preventing damage to the circuit modules from impacts during collisions. S40. Configure a wireless receiving device for impact data; Configure a wireless receiving device for impact data based on the wireless transmission distance of the test model; the wireless receiving device includes a receiving antenna, connecting cables, and data processing equipment. S50. Perform acceleration data analysis and processing; The test model crashes into the target, and the wireless receiving device obtains the impact data. The received impact data of the test model is demodulated and decoded to obtain the voltage curve output by the accelerometer during the impact process. The voltage curve is then processed by combining the accelerometer calibration data and the gain of the conditioning circuit to obtain the acceleration curve of the test model during the impact process.

[0007] Furthermore, the acceleration sensor is an accelerometer, the signal conditioning module includes a signal amplification and filtering circuit, the acquisition and recording module includes an AD sampling circuit, and the power supply module includes a battery; Among them, the accelerometer's range is 50% or more higher than the estimated peak acceleration generated by the collision; the sampling period of the AD sampling circuit is shorter than the duration of the collision process, and the sampling rate is set to the higher value of the AD sampling circuit.

[0008] The present invention provides a wireless measurement method for high g-value acceleration during a collision process. By installing a high-overload-resistant wireless transmission measurement device on the test model, it enables wireless measurement of acceleration data during the collision process, solving the problem of measuring high g-value acceleration data in high-speed collisions, explosions, and other events.

[0009] The wireless measurement method for high g-value acceleration during collision processes of the present invention utilizes wireless transmission, eliminating the need for retrieval of measurement and recording equipment and avoiding the problem of signal transmission lines being difficult to install on high-speed moving objects. It is particularly suitable for situations where high collision velocities generate high acceleration peaks of tens of thousands of g, and where wired transmission of measurement data is difficult to achieve, thus possessing practical engineering value. Attached Figure Description

[0010] Figure 1 This is a flowchart of the wireless measurement method for high g-value acceleration during the collision process according to the present invention; Figure 2 This is a schematic diagram of the air cannon firing model for an embodiment. Figure 2 In the middle, 1. accelerometer; 2. circuit module; 3. transmitting antenna; Figure 3 The acceleration curve of the air cannon firing model impacting the steel plate in the example is shown. Detailed Implementation

[0011] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0012] like Figure 1 As shown, the wireless measurement method for high g-value acceleration during a collision process according to the present invention includes the following steps: S10. Install the sensor and its supporting circuitry; An accelerometer, along with a signal conditioning module, an acquisition and recording module, and a power supply module, are placed inside the test model. S20. Install the transmitter and transmitting antenna; A transmitter is placed inside the test model. The transmitter includes a wireless transmission module for acquiring acceleration sensor data and a modulation circuit. Several transmitting antennas are installed on the surface of the test model, arranged in a centrally symmetrical manner. S30. Overload-resistant potting reinforcement of circuit modules; After debugging and confirming that each module is functioning normally, the signal conditioning module, acquisition and recording module, power supply module, wireless transmission module, and modulation circuit in the inner cavity of the test model are bundled together to form a circuit module. The circuit module is placed inside a titanium alloy shell, and epoxy resin is injected into the titanium alloy shell for primary potting. Then, the titanium alloy shell is placed on the central axis of the inner cavity of the test model, and polyurethane material is filled into the gaps in the inner cavity of the test model for secondary potting. The test model is then sealed, and the test model fabrication is complete. Encapsulation reinforcement enhances the overload resistance of circuit modules, preventing damage to the circuit modules from impacts during collisions. S40. Configure a wireless receiving device for impact data; Configure a wireless receiving device for impact data based on the wireless transmission distance of the test model; the wireless receiving device includes a receiving antenna, connecting cables, and data processing equipment. S50. Perform acceleration data analysis and processing; The test model crashes into the target, and the wireless receiving device obtains the impact data. The received impact data of the test model is demodulated and decoded to obtain the voltage curve output by the accelerometer during the impact process. The voltage curve is then processed by combining the accelerometer calibration data and the gain of the conditioning circuit to obtain the acceleration curve of the test model during the impact process.

[0013] Furthermore, the acceleration sensor is an accelerometer, the signal conditioning module includes a signal amplification and filtering circuit, the acquisition and recording module includes an AD sampling circuit, and the power supply module includes a battery; Among them, the accelerometer's range is 50% or more higher than the estimated peak acceleration generated by the collision; the sampling period of the AD sampling circuit is shorter than the duration of the collision process, and the sampling rate is set to the higher value of the AD sampling circuit. The higher the sampling rate, the more collision process history data are obtained.

[0014] Example: Figure 2 As shown, this embodiment uses an air cannon firing model, which is a blunt-nosed model. An accelerometer 1 is installed on the central axis near the blunt end of the front section of the air cannon firing model. A circuit module 2 is installed on the central axis of the rear section of the air cannon firing model. Several centrally symmetrical transmitting antennas 3 are installed on the surface of the rear section of the air cannon firing model. The accelerometer's range is 50000g; the battery capacity is 300mAh; the data transmission rate of the wireless transmitting module is 2Mbps or higher; the AD sampling circuit has a sampling rate of 100kHz, a sampling accuracy of 8bit, and a buffer circuit capacity of 1Mbit. The wireless transmission distance in this embodiment is 100 meters; [The last sentence appears to be incomplete and possibly refers to obtaining data.] Figure 3 The acceleration curve of the air cannon firing model impacting the steel plate is shown below. Figure 3 It can be seen that by using wireless transmission, the acceleration data of the air cannon model hitting the steel plate can be obtained in real time. The peak acceleration exceeds 17,000g, and the collision process lasts for about 2ms.

[0015] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. For those skilled in the art, all features disclosed in the present invention, or all steps in all methods or processes disclosed, except for mutually exclusive features and / or steps, can be combined in any way without departing from the principles of the present invention. The present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A wireless method for measuring high g-value acceleration during a collision process, characterized in that, Includes the following steps: S10. Install the sensor and its supporting circuitry; An accelerometer, along with a signal conditioning module, an acquisition and recording module, and a power supply module, are placed inside the test model. S20. Install the transmitter and transmitting antenna; A transmitter is placed inside the test model. The transmitter includes a wireless transmission module for acquiring acceleration sensor data and a modulation circuit. Several transmitting antennas are installed on the surface of the test model, arranged in a centrally symmetrical manner. S30. Overload-resistant potting reinforcement of circuit modules; After debugging and confirming that each module is functioning normally, the signal conditioning module, acquisition and recording module, power supply module, wireless transmission module, and modulation circuit in the inner cavity of the test model are bundled together to form a circuit module. The circuit module is placed inside a titanium alloy shell, and epoxy resin is injected into the titanium alloy shell for primary potting. Then, the titanium alloy shell is placed on the central axis of the inner cavity of the test model, and polyurethane material is filled into the gaps in the inner cavity of the test model for secondary potting. The test model is then sealed, and the test model fabrication is complete. Encapsulation reinforcement enhances the overload resistance of circuit modules, preventing damage to the circuit modules from impacts during collisions. S40. Configure a wireless receiving device for impact data; Configure a wireless receiving device for impact data based on the wireless transmission distance of the test model; the wireless receiving device includes a receiving antenna, connecting cables, and data processing equipment. S50. Perform acceleration data analysis and processing; The test model crashes into the target, and the wireless receiving device obtains the impact data. The received impact data of the test model is demodulated and decoded to obtain the voltage curve output by the accelerometer during the impact process. The voltage curve is then processed by combining the accelerometer calibration data and the gain of the conditioning circuit to obtain the acceleration curve of the test model during the impact process.

2. The wireless measurement method for high g-value acceleration during a collision process according to claim 1, characterized in that, The acceleration sensor is an accelerometer, the signal conditioning module includes a signal amplification and filtering circuit, the acquisition and recording module includes an AD sampling circuit, and the power supply module includes a battery; Among them, the accelerometer's range is 50% or more higher than the estimated peak acceleration generated by the collision; the sampling period of the AD sampling circuit is shorter than the duration of the collision process, and the sampling rate is set to the higher value of the AD sampling circuit.

Images