Calibration method of data acquisition system, data acquisition system, device and medium

Abstract

This application proposes a method for assembling and adjusting a data acquisition system, a data acquisition system, equipment, and a medium. The method includes: installing multiple mounting bases at preset locations on a vehicle, including both in-vehicle and external locations; mounting multiple sensors on their respective mounting bases; connecting the multiple sensors to their corresponding acquisition interfaces via signal transmission lines; adjusting the parameters of a sensor adaptation module based on a preset adaptation strategy; controlling a master clock module to generate a synchronization clock signal and transmitting the synchronization clock signal to the multiple sensors via signal transmission lines, enabling the sensors to acquire information according to the synchronization clock signal; receiving the acquired information from the multiple sensors and adjusting the parameters of the sensor adaptation module based on the timestamps and preset standard parameters in the acquired information. This enables rapid adaptation and assembly of the data acquisition system, improves the accuracy of data acquisition, and shortens the test preparation cycle.

Description

Technical Field

[0001] This application relates to the field of automotive testing technology, and in particular to a method for assembling and adjusting a data acquisition system, a data acquisition system, an electronic device, and a computer-readable storage medium. Background Technology

[0002] In automotive crash safety testing, the data acquisition system is the core equipment for obtaining key data such as collision impact force, vehicle deformation, and dummy motion posture. Its performance directly determines the validity of the test data.

[0003] Currently, the assembly and adjustment of the data acquisition system mainly relies on manual adaptation. For different vehicle models or test types, the sensor installation scheme and wiring need to be redesigned, resulting in a long adaptation cycle and poor versatility. The preparation cycle can take as long as 2-3 days. At the same time, the strong electromagnetic interference and violent vibrations generated by the collision can easily cause data distortion and loss, making it difficult to guarantee data accuracy. Furthermore, the lack of a unified time reference for multi-source data leads to large synchronization errors, making it difficult to meet the needs of refined analysis in collision tests. Summary of the Invention

[0004] This application aims to at least partially address one of the technical problems in the related art.

[0005] Therefore, the first objective of this application is to propose a method for assembling and debugging a data acquisition system, which can enable rapid adaptation and debugging of the data acquisition system, improve the accuracy and stability of data acquisition, effectively shorten the preparation cycle of the experiment, and reduce debugging costs.

[0006] The second objective of this application is to propose a data acquisition system.

[0007] The third objective of this application is to propose an electronic device.

[0008] The fourth objective of this application is to provide a computer-readable storage medium.

[0009] To achieve the above objectives, the first aspect of this application proposes a method for assembling and adjusting a data acquisition system. The data acquisition system includes multiple mounting bases, multiple sensors, and a data acquisition terminal. The data acquisition terminal includes an acquisition interface, a master clock module, and a sensor adaptation module. The acquisition interface is connected to the master clock module and the sensor adaptation module, respectively. The method includes the following steps: installing multiple mounting bases at preset positions in a vehicle, wherein the preset positions include in-vehicle positions and out-of-vehicle positions; setting multiple sensors on corresponding mounting bases; connecting multiple sensors to corresponding acquisition interfaces via signal transmission lines; adjusting the parameters of the sensor adaptation module based on a preset adaptation strategy; controlling the master clock module to generate a synchronization clock signal and sending the synchronization clock signal to the multiple sensors via signal transmission lines, so that the sensors can acquire information according to the synchronization clock signal; receiving the acquisition information sent by the multiple sensors and adjusting the parameters of the sensor adaptation module based on the timestamps in the acquisition information and preset standard parameters.

[0010] According to the data acquisition system assembly and debugging method of this application embodiment, firstly, multiple mounting bases are installed at preset positions on the vehicle, including interior and exterior positions. Then, multiple sensors are respectively mounted on their corresponding mounting bases. Next, the sensors are connected to their respective acquisition interfaces via signal transmission lines. Then, the parameters of the sensor adaptation module are adjusted based on a preset adaptation strategy. Subsequently, the master clock module is controlled to generate a synchronization clock signal, which is then sent to the multiple sensors via signal transmission lines, enabling the sensors to acquire information according to the synchronization clock signal. Finally, the acquired information from the multiple sensors is received, and the parameters of the sensor adaptation module are adjusted based on the timestamps and preset standard parameters in the acquired information. This enables rapid assembly and debugging of the data acquisition system, improves the accuracy and stability of data acquisition, effectively shortens the test preparation cycle, and reduces debugging costs.

[0011] In addition, the assembly and adjustment method of the data acquisition system according to the above embodiments of this application may also have the following additional technical features:

[0012] In one embodiment of this application, the external vehicle position includes the front of the vehicle body and the B-pillar of the vehicle body, and the internal vehicle position includes the head, chest and leg positions of the driver's cabin dummy. The front of the vehicle body includes the engine hood and the engine compartment rack. The surface of the mounting base is provided with a T-shaped groove, and the back of the mounting base is provided with a magnetic layer.

[0013] In one embodiment of this application, the plurality of mounting bases includes a first mounting base, a second mounting base, a third mounting base, and a fourth mounting base. The mounting bases are respectively installed at preset positions on the vehicle, including: attaching the first mounting base to the engine hood using a corresponding magnetic layer; attaching the second mounting base to a rack inside the engine compartment using a corresponding magnetic layer; attaching the third mounting base to the B-pillar of the vehicle body using a corresponding magnetic layer; and attaching the fourth mounting base to the magnetic plate of the driver's cabin dummy using a corresponding magnetic layer, or fixing the fourth mounting base to the driver's cabin dummy using corresponding bolts.

[0014] In one embodiment of this application, the multiple sensors include an acceleration sensor, a force sensor, and a displacement sensor, and the multiple mounting bases include a fifth mounting base, a sixth mounting base, and a seventh mounting base. The multiple sensors are respectively mounted on their respective mounting bases, including: fixing the acceleration sensor to the fifth mounting base via a threaded adapter; fixing the force sensor to the sixth mounting base via a cylindrical hole adapter; and fixing the displacement sensor to the seventh mounting base via a custom bracket and a T-slot.

[0015] In one embodiment of this application, the signal transmission line adopts a double-layer shielding structure, wherein the inner layer of the signal transmission line is a tin-plated copper mesh, the outer layer of the signal transmission line is an aluminum foil, and the outer layer of the signal transmission line is wrapped with a silicone sheath.

[0016] In one embodiment of this application, both the threaded adapter and the cylindrical hole adapter are provided with elastic washer structures; the outer shell of the data acquisition terminal is made of galvanized steel plate, and the data acquisition terminal also includes an electromagnetic isolation module, which is used to isolate the power supply.

[0017] In one embodiment of this application, the timestamp in the collected information is obtained to determine the collection time of each sensor; based on the collection time of each sensor, the time difference corresponding to each sensor is calculated, and the parameters of the corresponding sensor are corrected according to the time difference and a preset linear interpolation algorithm.

[0018] To achieve the above objectives, a second aspect of this application provides a data acquisition system, comprising: multiple mounting bases, multiple sensors, and a data acquisition terminal. The multiple mounting bases are respectively installed at preset positions on a vehicle, including both in-vehicle and external locations. The multiple sensors are respectively mounted on their corresponding mounting bases. The data acquisition terminal includes an acquisition interface, a master clock module, and a sensor adapter module. The acquisition interface is connected to both the master clock module and the sensor adapter module. The multiple sensors are respectively connected to their corresponding acquisition interfaces via signal transmission lines.

[0019] According to the data acquisition system of the present application embodiment, the data acquisition system is assembled and adjusted by the above-described assembly and adjustment method, which realizes rapid adaptation and adjustment of the data acquisition system, improves the accuracy and stability of data acquisition, effectively shortens the preparation cycle of the test, and reduces the debugging cost.

[0020] To achieve the above objectives, a third aspect of this application provides an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the assembly and adjustment method of any of the above-described data acquisition systems.

[0021] The electronic device according to the embodiments of this application implements the assembly and debugging method of any of the above data acquisition systems when the processor executes a computer program, thereby realizing the rapid adaptation and assembly of the data acquisition system, improving the accuracy and stability of data acquisition, effectively shortening the preparation cycle of the test, and reducing the debugging cost.

[0022] To achieve the above objectives, a fourth aspect of this application provides a computer-readable storage medium having a computer program stored thereon, which is executed by a processor to implement the assembly and adjustment method of any of the above data acquisition systems.

[0023] According to the embodiments of this application, a computer-readable storage medium storing a computer program thereon implements any of the above-described data acquisition system assembly and debugging methods when executed by a processor. This enables rapid adaptation and assembly of the data acquisition system, improves the accuracy and stability of data acquisition, effectively shortens the preparation cycle of the experiment, and reduces debugging costs.

[0024] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0025] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is a flowchart illustrating the assembly and adjustment method of a data acquisition system according to some embodiments of this application; Figure 2 This is a flowchart illustrating the assembly and adjustment method of a data acquisition system according to a specific embodiment of this application; Figure 3 A block diagram of a data acquisition system according to some embodiments of this application; and Figure 4 This is a schematic diagram of the structure of an electronic device according to some embodiments of this application. Detailed Implementation

[0026] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0027] The following description, with reference to the accompanying drawings, outlines an assembly and adjustment method for a data acquisition system, a data acquisition system, an electronic device, and a computer-readable storage medium according to embodiments of this application.

[0028] The data acquisition system assembly and adjustment method provided in this application embodiment can be executed by an electronic device, such as a mobile phone, tablet computer, handheld computer, or server, etc., without any limitation.

[0029] In this embodiment, the electronic device may include a processing component, a storage component, and a driving component. Optionally, the driving component and the processing component may be integrated, and the storage component may store an operating system, application programs, or other program modules. The processing component implements the data acquisition system assembly method provided in this embodiment by executing the application programs stored in the storage component.

[0030] It should be noted that, in this embodiment, the data acquisition system includes multiple mounting bases, multiple sensors, and a data acquisition terminal. The data acquisition terminal includes an acquisition interface, a master clock module, and a sensor adapter module. The acquisition interface is connected to both the master clock module and the sensor adapter module. The core objective of this application is to construct a data acquisition and adjustment system adaptable to different vehicle models and different crash test scenarios, based on the modular architecture of the mounting bases, sensors, and data acquisition terminal. The mounting bases are used to securely install sensors at various preset positions on the vehicle. The sensors are used to collect various key data from the crash test. The data acquisition terminal, through the collaboration of the acquisition interface, master clock module, and sensor adapter module, achieves sensor adaptation, synchronous data acquisition, and parameter calibration. Through the collaborative work of these components, the pain points of traditional acquisition systems—such as cumbersome installation and adjustment, inaccurate data, and poor synchronization—are resolved, achieving efficient installation and adjustment and accurate data acquisition.

[0031] Based on the above data acquisition system, such as Figure 1 As shown, the assembly and adjustment method of the data acquisition system in this application embodiment may include the following steps: Step S1: Install multiple mounting bases at preset positions on the vehicle, including interior and exterior positions. The preset positions can be calibrated according to actual conditions.

[0032] Specifically, the mounting base, as the carrier for the sensors, determines the stability and accuracy of the sensor data acquisition, forming the foundation for the reliable operation of the data acquisition system. The preset positions of the mounting base include both in-vehicle and out-of-vehicle locations. These positions need to be flexibly calibrated based on the vehicle body structure and the acquisition requirements of different crash test types to comprehensively cover key monitoring dimensions during the collision process. This ensures that subsequent sensors can accurately collect core data such as vehicle body stress, deformation, and dummy motion posture. During installation, it is crucial to ensure that the mounting base fits tightly and securely against the vehicle's mounting surface, simulating the actual installation state in a crash test. Loose installation should be avoided to prevent base displacement during a collision, which could lead to data distortion from the sensors.

[0033] Step S2: Install multiple sensors on their respective mounting bases.

[0034] Specifically, as the core execution component for data acquisition, the sensor's corresponding setting with the mounting base must match the monitoring requirements of the preset location, ensuring that each sensor can accurately correspond to its preset monitoring dimension. During installation, the sensor must be securely fixed to its corresponding mounting base, ensuring a tight and secure connection between the sensor and the base to prevent sensor displacement or detachment due to vibration during the collision, which would affect the continuity and accuracy of data acquisition. Simultaneously, it must be ensured that the sensor's installation posture meets the acquisition requirements, enabling its monitoring direction and acquisition range to accurately cover the target monitoring area, thus guaranteeing the accurate acquisition of key data in subsequent collision tests.

[0035] Step S3: Connect multiple sensors to their respective acquisition interfaces via signal transmission lines.

[0036] Specifically, the signal transmission line is the core data path between the sensor and the data acquisition terminal. In practice, a transmission line that conforms to the system design specifications must be selected, such as a model with a specified shielding layer and sheath structure. During connection, one end of the transmission line must be reliably connected to the sensor's own electrical output port, and the other end should be connected to the corresponding standardized acquisition interface on the data acquisition terminal. At the same time, ensure that the connectors are firmly plugged in and have good contact to avoid signal interference or data loss due to poor contact.

[0037] Step S4: Adjust the parameters of the sensor adaptation module based on the preset adaptation strategy. The preset adaptation strategy can be calibrated according to the actual situation.

[0038] Specifically, the sensor adaptation module is a key functional unit within the data acquisition terminal responsible for conditioning the raw sensor signals. The core of the preset adaptation strategy lies in using a set of predefined signal conditioning calculation formulas to automatically match and set key parameters between the sensor and the acquisition terminal. This ensures that the signal input to the core analog-to-digital converter of the data acquisition terminal is within the optimal range (e.g., 0-5V) and filters out irrelevant noise. Preferably, corresponding calculation logic can be used for the three core types of sensors: acceleration, force, and displacement. For acceleration sensors, the amplification factor can be calculated using the following formula:

[0039] in, This refers to the magnification factor of the accelerometer. The maximum input voltage of the acquisition terminal (e.g., 5V). This represents the sensor's maximum range, expressed in grams. The value represents the sensor sensitivity, expressed in mV / g.

[0040] For force sensors, the amplification factor can be calculated using the following formula:

[0041] in, The amplification factor of the force sensor. This represents the maximum range of the sensor, expressed in kN. The value represents the sensor sensitivity, expressed in mV / kN.

[0042] For displacement sensors, the filter cutoff frequency can be calculated using the following formula:

[0043] in, This is the filter cutoff frequency, in Hz. This represents the maximum speed of the vehicle body during a collision, measured in m / s, and is typically less than or equal to 20 m / s. This represents the maximum range of the sensor, expressed in mm.

[0044] In the practical process, after the sensor is connected to the adapter module, the module can automatically read the sensor's model and core parameters, substitute them into the above formula to automatically calculate the amplification factor and filter cutoff frequency, and adjust the signal conditioning unit parameters accordingly. Finally, the conditioned signal is transmitted to the acquisition terminal via Ethernet. No manual debugging is required throughout the process, which greatly improves the adaptation efficiency and accuracy.

[0045] Step S5: Control the master clock module to generate a synchronous clock signal, and send the synchronous clock signal to multiple sensors through the signal transmission line so that the sensors can collect information according to the synchronous clock signal.

[0046] Specifically, the master clock module generates a synchronous clock signal to ensure that all sensors start data acquisition at the same time, avoiding data analysis errors caused by timing deviations. During operation, the host computer software or hardware logic of the data acquisition terminal issues a command to start the master clock module. This module can use a GPS / BeiDou dual-mode satellite receiver unit, paired with a high-stability temperature-compensated crystal oscillator (TCXO) as a backup time base, and undergoes precise calibration before testing. The synchronous clock signal generated by the master clock module is typically a pulse signal of a specific frequency, such as 1 PPS (pulses per second), or a higher frequency clock square wave. It is transmitted to the sensor nodes via a dedicated clock bus or data network (such as Ethernet) within the system, through pre-connected signal transmission lines, establishing a unified acquisition timing reference.

[0047] Once the sensor receives the synchronization clock signal, it will use this as a trigger command to synchronously collect data on vehicle body stress, structural deformation, and dummy motion posture. This ensures that the raw data acquired by sensors at different locations and of different types have strict time consistency, providing a reliable temporal basis for subsequent correlation analysis and accurate modeling of crash test data.

[0048] Step S6: Receive data collected from multiple sensors and adjust the parameters of the sensor adapter module based on the timestamps and preset standard parameters in the collected data. The preset standard parameters can be calibrated according to actual conditions.

[0049] Specifically, the data acquisition terminal receives the acquisition information sent by each sensor in real time through its acquisition interface module. Preferably, this interface module can adopt a modular slot and standard Ethernet (e.g., 1000Mbps) design. The data acquisition terminal receives the acquisition information sent by each sensor based on a synchronization clock signal in real time. The acquisition information includes the raw data collected by the sensor and the corresponding timestamp. This timestamp is consistent with the synchronization clock signal generated by the master clock module, which can accurately trace the acquisition time sequence of each set of data. During the receiving process, the acquisition information needs to be initially verified to confirm that the data transmission is complete, without missing or garbled data, to ensure the reliability of subsequent parameter adjustments.

[0050] The preset standard parameters serve as the benchmark for calibrating the sensor adapter module parameters. Their setting must be combined with the specific requirements of the crash test, the sensor's performance indicators, and the operating parameters of the acquisition terminal. They can be flexibly calibrated according to the differences in the actual test vehicle model and crash scenario. In practice, the raw data and timestamps in the acquired information are compared and analyzed with the preset standard parameters to determine whether the current parameter settings of the sensor adapter module are reasonable. If data deviations exceed the allowable range, abnormal signal interference exists, or the acquisition accuracy is substandard, parameters such as the signal amplification factor and filter cutoff frequency of the adapter module will be dynamically adjusted based on the comparison results to ensure that the acquired information output by the sensor always conforms to the preset standard, guaranteeing the accuracy and stability of the entire data acquisition process.

[0051] This embodiment first installs multiple mounting bases at preset locations on the vehicle, including both inside and outside the vehicle. Then, multiple sensors are positioned on their respective mounting bases and connected to their corresponding data acquisition interfaces via signal transmission lines. Next, the sensor adaptation module's parameters are adjusted based on a preset adaptation strategy. Subsequently, the master clock module generates a synchronization clock signal, which is then transmitted to the multiple sensors via signal transmission lines, enabling the sensors to acquire information according to the synchronization clock signal. Finally, the system receives the acquired information from the multiple sensors and adjusts the sensor adaptation module's parameters based on the timestamps and preset standard parameters in the acquired information. This enables rapid adaptation and commissioning of the data acquisition system, improves the accuracy and stability of data acquisition, effectively shortens the test preparation cycle, and reduces debugging costs.

[0052] In some embodiments of this application, the external vehicle position includes the front of the vehicle body and the B-pillar of the vehicle body, and the internal vehicle position includes the head, chest and leg positions of the driver's cabin dummy. The front of the vehicle body includes the engine hood and the engine compartment rack. The surface of the mounting base is provided with a T-shaped groove, and the back of the mounting base is provided with a magnetic layer.

[0053] Specifically, based on the core monitoring requirements of automotive crash tests, the placement and structure of the mounting bases are specifically designed to ensure comprehensive monitoring coverage and convenient and reliable installation. External locations can focus on key stress and deformation areas during a collision. The front of the vehicle can be selected around the hood and engine compartment frame, as this area is the primary stress-bearing component. Sensors installed at these locations can accurately collect core data such as impact force and deformation of the front of the vehicle. The B-pillar, as a key load-bearing structure in side collisions, directly affects occupant safety; sensors installed at these locations can accurately monitor the B-pillar's collision response data. Internal locations revolve around the driver's cabin dummy, focusing on the head, chest, and legs. These three areas are the most vulnerable to injury during a collision. By placing mounting bases at these locations, sensors can closely monitor the acceleration, displacement, and other damage-related data of various parts of the dummy, providing accurate occupant injury references for crash safety assessment.

[0054] Preferably, the mounting base can be made of lightweight, high-strength plastic (PA6 + glass fiber), balancing lightweight design with structural strength. This reduces the additional load on the vehicle body while withstanding severe impacts during a collision, preventing damage to the base itself. The base surface features standardized T-slots, 10mm wide and 20mm apart, which are used to secure sensor brackets of different sizes using T-bolts, adapting to diverse sensor installation needs. A magnetic layer on the back of the base provides a magnetic force ≥50N, allowing direct adhesion to the vehicle's metal surface without drilling, significantly simplifying the installation process and improving efficiency. It also adapts to different vehicle body structures and ensures the base's stability during crash tests, preventing displacement due to vibration and further guaranteeing the accuracy of sensor data.

[0055] In some embodiments of this application, the multiple mounting bases include a first mounting base, a second mounting base, a third mounting base, and a fourth mounting base. Installing the multiple mounting bases at preset positions on the vehicle includes: attaching the first mounting base to the engine hood using a corresponding magnetic layer; attaching the second mounting base to a rack inside the engine compartment using a corresponding magnetic layer; attaching the third mounting base to the B-pillar of the vehicle body using a corresponding magnetic layer; and attaching the fourth mounting base to the magnetic plate of the driver's cabin dummy using a corresponding magnetic layer, or fixing the fourth mounting base to the driver's cabin dummy using corresponding bolts.

[0056] Specifically, the first mounting base adheres to the engine hood to monitor the force and deformation data of the engine hood during a collision. The second mounting base adheres to the frame inside the engine compartment to monitor the collision response of the internal structure of the engine compartment. Together, they achieve comprehensive collection of front-end collision data. The third mounting base adheres to the B-pillar of the vehicle to specifically monitor the force and displacement of the B-pillar during a side collision, providing data support for side-impact safety assessment. The fourth mounting base is used for data collection related to the cockpit dummy. Considering the special structure of the dummy, two adaptive installation methods can be adopted. When the dummy is equipped with a magnetic plate, it can be quickly attached and fixed through the magnetic layer on the back of the base, simplifying the installation process. When the dummy does not have a magnetic structure, bolt fixing is used to ensure stable and reliable installation, avoid displacement of the base due to collision vibration, and ensure the accuracy of the monitoring data related to the dummy. Preferably, all mounting bases rely on their own magnetic layers with a suction force of ≥50N for rapid attachment, eliminating the need for drilling into the vehicle body or dummy. This protects the mounting carrier, improves installation efficiency, and adapts to different vehicle models and dummy specifications.

[0057] In some embodiments of this application, the multiple sensors include an acceleration sensor, a force sensor, and a displacement sensor, and the multiple mounting bases include a fifth mounting base, a sixth mounting base, and a seventh mounting base. The multiple sensors are respectively mounted on their respective mounting bases, including: fixing the acceleration sensor to the fifth mounting base via a threaded adapter; fixing the force sensor to the sixth mounting base via a cylindrical hole adapter; and fixing the displacement sensor to the seventh mounting base via a custom bracket and a T-slot.

[0058] Specifically, for the three core sensors—accelerometer, force sensor, and displacement sensor—and their structural characteristics and installation requirements, targeted fixing methods must be adopted, using dedicated mounting bases to ensure stable sensor installation and accurate data acquisition. Specifically, the fifth mounting base is adapted for the accelerometer, using a threaded adapter for fixation. The threaded connection provides excellent tightness, effectively resisting severe vibrations during a collision, preventing accelerometer displacement, and ensuring accurate acquisition of acceleration data from the vehicle body or dummy. The sixth mounting base is adapted for the force sensor, using a cylindrical hole adapter for fixation. This conforms to the force sensor's mounting structure, enabling rapid positioning and fixation of the force sensor, while ensuring smooth force transmission and improving the accuracy of force signal acquisition. The seventh mounting base is adapted for the displacement sensor, utilizing standardized T-slots on the base surface (e.g., 10mm wide, 20mm spacing) with a custom bracket for fixation. The T-slot structure allows for flexible adjustment of the custom bracket's position to adapt to different displacement monitoring needs. The custom bracket precisely matches the displacement sensor's installation dimensions, ensuring that the displacement sensor's monitoring direction and acquisition range meet preset requirements, thus guaranteeing accurate displacement data acquisition during a collision.

[0059] In some embodiments of this application, the signal transmission line adopts a double-layer shielding structure, wherein the inner layer of the signal transmission line is a tin-plated copper mesh, the outer layer of the signal transmission line is an aluminum foil, and the outer layer of the signal transmission line is wrapped with a silicone sheath.

[0060] Specifically, the signal transmission line, as the core data path between the sensor and the data acquisition terminal, can adopt a double-layer shielding structure to adapt to the complex environment of crash tests. The inner tin-plated copper mesh has excellent conductivity, effectively shielding against low-frequency electromagnetic interference and reducing signal loss during transmission. The outer aluminum foil layer shields against high-frequency electromagnetic interference, isolating high-frequency noise from other electrical equipment and transmission lines at the crash test site, preventing interference signals from intruding into the transmission line and causing data distortion. Furthermore, the silicone sheath covering the signal transmission line is heat-resistant, wear-resistant, anti-aging, and highly flexible, protecting the internal shielding layer and wire core from damage caused by friction, compression, and impact during crash tests. It also adapts to wiring requirements at different locations on the vehicle body, facilitating wiring organization and layout, further ensuring the continuity and reliability of signal transmission, and providing a stable path for accurate crash test data acquisition.

[0061] In some embodiments of this application, both the threaded adapter and the cylindrical hole adapter are provided with elastic washer structures; the outer shell of the data acquisition terminal is made of galvanized steel plate, and the data acquisition terminal also includes an electromagnetic isolation module, which is used to isolate the power supply.

[0062] Specifically, the threaded adapter can be used to fix the accelerometer, while the cylindrical hole adapter can be used to fix the force sensor. Both are equipped with elastic washers. On the one hand, these washers fill the tiny gaps between the sensor and the adapter, achieving a tight fit and enhancing the connection's stability. This effectively resists the severe vibrations generated during impact tests, preventing loosening or displacement between the sensor and the adapter, and ensuring the stability of the accelerometer's posture and the smooth force transmission of the force sensor. On the other hand, the elastic washers also act as buffers and shock absorbers, reducing damage to the sensor itself from vibrations and minimizing signal interference caused by vibrations, thus ensuring the accuracy of the data acquired by both sensors.

[0063] As the core control and storage unit of the entire acquisition system, the data acquisition terminal's casing can be made of galvanized steel sheet. Galvanized steel sheet possesses excellent mechanical strength, corrosion resistance, and electromagnetic shielding performance. It can withstand the impact and friction damage from the collision test site, protecting the safety of the internal electronic components, and also provides initial shielding against external electromagnetic interference, preventing interference signals from intruding into the terminal and affecting data processing and storage. The data acquisition terminal also includes an electromagnetic isolation module, specifically for power isolation. This effectively isolates clutter interference in the power supply line, preventing external power interference from entering the terminal through the power supply line. Simultaneously, it prevents electromagnetic signals from radiating outwards from the terminal, interfering with the normal operation of sensors and signal transmission lines, thus achieving electromagnetic protection at the power supply level. The combination of the galvanized steel sheet casing and the power isolation of the electromagnetic isolation module forms a double protection, ensuring the stable operation of the data acquisition terminal in complex collision test environments and guaranteeing the safe and reliable processing, transmission, and storage of acquired data.

[0064] In some embodiments of this application, timestamps from the collected information are obtained to determine the acquisition time of each sensor; based on the acquisition time of each sensor, the time difference corresponding to each sensor is calculated, and the parameters of the corresponding sensor are corrected according to the time difference and a preset linear interpolation algorithm. The preset linear interpolation algorithm can be calibrated according to actual conditions.

[0065] Specifically, during the data acquisition process, the master clock module can use a GPS / BeiDou dual-mode master clock (with a time accuracy of ≤10ns) as a unified time reference to send synchronization signals to all sensors and acquisition devices, ensuring that the initial time deviation of each device is ≤10ns. Simultaneously, the master clock module generates a synchronization marker signal every 1ms. This signal can be a high-level pulse with a width of 10μs, which is synchronously transmitted to all connected sensors. When each sensor acquires data such as vehicle body force, deformation, or dummy posture, it automatically embeds the timestamp of this synchronization marker signal into the data frame, corresponding the acquired data one-to-one with the timestamp, providing a clear timing basis for subsequent time calibration.

[0066] After the experiment, the parameter correction phase began. First, embedded data frames were extracted from the data collected by each sensor, and the timestamps corresponding to the data collected by each sensor were separated. The specific acquisition time of each set of data from each sensor was determined by the timestamps. Then, based on a unified master clock time reference, the time difference between the acquisition time of each sensor and the reference time was calculated. This time difference mainly comes from the inherent delay of the sensor itself (such as the frame rate delay and response delay of some supporting acquisition equipment) and micro-hour timing deviations during transmission. For example, the inherent delay of high-speed camera equipment at 1000fps is about 1ms, and the inherent delay of strain acquisition equipment is about 0.2ms.

[0067] To address the aforementioned time difference, a preset linear interpolation algorithm combined with a synchronization deviation correction formula is used to correct the sensor parameters. The preset linear interpolation algorithm can be flexibly calibrated according to the test vehicle model, sensor type, and characteristics of the data acquisition equipment. The correction formula is as follows:

[0068] in, This is the synchronized timestamp, in milliseconds. The device measures a timestamp in milliseconds. This refers to the inherent latency of the device, measured in milliseconds (ms). For example, when a high-speed camera operates at 1000fps, ≈1ms, strain acquisition instrument ≈0.2ms, where k is the delay drift coefficient, typically less than or equal to 0.001, determined by the stability of the specific device. The time is the start time of the experiment, expressed in milliseconds (ms).

[0069] After synchronization is complete, the accuracy is verified by the time difference of multi-source data. The verification formula is as follows:

[0070] in, For accuracy, preferably, when When the time is less than or equal to 1ms, it ensures that the sensor's data acquisition achieves precise time alignment and that the synchronization error is controlled within a preset range, providing reliable timing assurance for subsequent correlation analysis of multi-source acquisition data, collision process reconstruction, and experimental result evaluation.

[0071] As a specific embodiment of this application, such as Figure 2 As shown, in a frontal 100% overlap rigid barrier crash test of a certain car, the data acquisition system assembly and adjustment method may include the following steps: S101, multiple mounting bases are installed in preset positions on the vehicle, including interior and exterior positions.

[0072] Specifically, according to the test requirements, a total of 12 universal mounting bases were installed on key parts such as the front of the vehicle (engine compartment), the head / chest / legs of the dummy in the cockpit, and the B-pillar of the vehicle body, using magnetic layers.

[0073] S102, multiple sensors are respectively set on their corresponding mounting bases.

[0074] Specifically, install six accelerometers (range 0-200g), adjust the signal conditioning unit amplification to 50x and the filter cutoff frequency to 500Hz, and adapt the output signal to the 0-5V input range of the acquisition terminal. Install three force sensors (range 0-50kN): set the signal conditioning unit amplification to 20x and the filter cutoff frequency to 200Hz. Install two displacement sensors (range 0-500mm): fix them to the T-slot of the base using custom brackets; no signal conditioning unit amplification is required, and the filter cutoff frequency is set to 1000Hz.

[0075] S103 connects multiple sensors to their respective acquisition interfaces via signal transmission lines.

[0076] Specifically, connect the signal output line of the sensor adapter module to the data acquisition terminal interface module, select the Ethernet interface (1000Mbps), and the interface module will automatically detect the sensor type and match the acquisition parameters, thus completing the installation and adjustment.

[0077] S104, Adjust the parameters of the sensor adaptation module based on the preset adaptation strategy.

[0078] Specifically, the range of the accelerometer sensor =200g sensitivity =10mV / g, then the amplification factor is... =5V / (200g (10mV / g) = 5 / 2 = 2.5. Force sensor range. =50kN, sensitivity =2mV / kN, then the amplification factor =5V / (50kN (2mV / kN) = 5 / 0.1 = 50. Displacement sensor range. =500mm, maximum speed of the vehicle =18m / s, then the filter cutoff frequency =18m / s / (2 500mm) =18 / 1 1 = 18Hz, so we take an approximation and set it to 20Hz.

[0079] The shielding effectiveness of the double-shielded wire is SE=30+25+10=65dB, which meets the requirement of ≥60dB. In vibration error compensation, the sensor mass is m=0.3kg, and the vibration acceleration is... =80g=784m / s², included angle =0°, then the compensation term m =0.3 784 1 = 235.2 N = 0.2352 kN, and this value will be automatically deducted during subsequent data acquisition.

[0080] S105 controls the master clock module to generate a synchronous clock signal and sends the synchronous clock signal to multiple sensors through the signal transmission line, so that the sensors can collect information according to the synchronous clock signal.

[0081] Specifically, the master clock sends synchronization signals to the sensor acquisition unit (sampling rate 20kHz), the high-speed camera (1000fps=1ms), and the strain acquisition instrument (10kHz=0.2ms), with an initial deviation of 8ns.

[0082] After a collision is triggered, the master clock generates a synchronization marker every 1ms, each device records a "data-timestamp", and the sensor acquisition unit applies the vibration error compensation formula in real time to correct the force value data.

[0083] S106 receives data collected from multiple sensors and adjusts the parameters of the sensor adapter module based on the timestamps and preset standard parameters in the data collected.

[0084] Specifically, by substituting the synchronization deviation correction formula and the corrected timestamp of the high-speed camera, the final time difference of the multi-source data is t = 0.7ms ≤ 1ms.

[0085] By comparing the corrected force value with the standard load, the known peak collision force is 35kN and the measured value is 35.2kN. Therefore, the error is 0.57%≤1%, the data accuracy is 99.6%, and the assembly and adjustment efficiency is 67% higher than that of the traditional system.

[0086] In summary, the data acquisition system assembly and debugging method according to the embodiments of this application firstly installs multiple mounting bases at preset positions on the vehicle, including both in-vehicle and out-of-vehicle positions. Then, multiple sensors are respectively mounted on their corresponding mounting bases, and each sensor is connected to its corresponding acquisition interface via signal transmission lines. Next, the sensor adaptation module's parameters are adjusted based on a preset adaptation strategy. Subsequently, the master clock module generates a synchronization clock signal, which is then sent to the multiple sensors via signal transmission lines, enabling the sensors to acquire information according to the synchronization clock signal. Finally, the system receives the acquired information from the multiple sensors and adjusts the sensor adaptation module's parameters based on the timestamps and preset standard parameters in the acquired information. This enables rapid assembly and debugging of the data acquisition system, improves the accuracy and stability of data acquisition, effectively shortens the test preparation cycle, and reduces debugging costs.

[0087] Corresponding to the above embodiments, this application also proposes a data acquisition system.

[0088] like Figure 3As shown, the data acquisition system 300 of this application embodiment includes: multiple mounting bases 310, multiple sensors 320, and a data acquisition terminal 330. The multiple mounting bases 310 are respectively installed at preset positions in the vehicle, including interior and exterior positions. The multiple sensors 320 are respectively mounted on corresponding mounting bases 310. The data acquisition terminal 330 includes an acquisition interface 331, a master clock module 332, and a sensor adapter module 333. The acquisition interface 331 is connected to the master clock module 332 and the sensor adapter module 333, respectively. The multiple sensors 320 are respectively connected to the corresponding acquisition interface 331 through signal transmission lines.

[0089] According to the data acquisition system of the present application embodiment, the data acquisition system is assembled and adjusted by the above-described assembly and adjustment method, which realizes rapid adaptation and adjustment of the data acquisition system, improves the accuracy and stability of data acquisition, effectively shortens the preparation cycle of the test, and reduces the debugging cost.

[0090] Corresponding to the above embodiments, this application also proposes an electronic device.

[0091] like Figure 4 As shown, the electronic device 400 of this application embodiment includes a memory 410, a processor 420, and a computer program stored in the memory and executable on the processor. The processor executes the program to implement the assembly and adjustment method of any of the above-described data acquisition systems.

[0092] The electronic device according to the embodiments of this application implements the assembly and debugging method of any of the above data acquisition systems when the processor executes a computer program, thereby realizing the rapid adaptation and assembly of the data acquisition system, improving the accuracy and stability of data acquisition, effectively shortening the preparation cycle of the test, and reducing the debugging cost.

[0093] Corresponding to the above embodiments, this application also proposes a computer-readable storage medium.

[0094] The computer-readable storage medium of this application embodiment stores a computer program thereon, which is executed by a processor to implement the assembly and adjustment method of any of the above-described data acquisition systems.

[0095] According to the embodiments of this application, a computer-readable storage medium storing a computer program thereon implements any of the above-described data acquisition system assembly and debugging methods when executed by a processor. This enables rapid adaptation and assembly of the data acquisition system, improves the accuracy and stability of data acquisition, effectively shortens the preparation cycle of the experiment, and reduces debugging costs.

[0096] Specifically, in the embodiments of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0097] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0098] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A method for assembling and adjusting a data acquisition system, characterized in that, The data acquisition system includes multiple mounting bases, multiple sensors, and a data acquisition terminal. The data acquisition terminal includes an acquisition interface, a master clock module, and a sensor adapter module. The acquisition interface is connected to both the master clock module and the sensor adapter module. The method includes: The plurality of mounting bases are respectively installed at preset positions on the vehicle, wherein the preset positions include interior positions and exterior positions; The plurality of sensors are respectively mounted on the corresponding mounting bases; The plurality of sensors are respectively connected to the corresponding acquisition interface via signal transmission lines; The parameters of the sensor adaptation module are adjusted based on a preset adaptation strategy. The master clock module is controlled to generate a synchronous clock signal, and the synchronous clock signal is sent to the multiple sensors through the signal transmission line, so that the sensors can collect information according to the synchronous clock signal. The sensor adapter module receives the acquisition information sent by the multiple sensors and adjusts the parameters based on the timestamps and preset standard parameters in the acquisition information.

2. The assembly and adjustment method of the data acquisition system according to claim 1, characterized in that, The external positions include the front of the vehicle body and the B-pillar position, and the internal positions include the head, chest, and legs of the driver's cabin dummy. The front of the vehicle body includes the hood and the engine compartment frame. The surface of the mounting base is provided with a T-shaped groove, and the back of the mounting base is provided with a magnetic layer.

3. The assembly and adjustment method of the data acquisition system according to claim 2, characterized in that, The plurality of mounting bases includes a first mounting base, a second mounting base, a third mounting base, and a fourth mounting base, wherein installing the plurality of mounting bases respectively at preset positions on the vehicle includes: The first mounting base is attached to the engine hood via the corresponding magnetic layer; The second mounting base is attached to the frame inside the engine compartment using the corresponding magnetic layer; The third mounting base is attached to the B-pillar of the vehicle body via a corresponding magnetic layer; The fourth mounting base is attached to the magnetic plate of the cockpit dummy via a corresponding magnetic layer, or the fourth mounting base is fixed to the cockpit dummy with corresponding bolts.

4. The assembly and adjustment method of the data acquisition system according to claim 2, characterized in that, The plurality of sensors include an acceleration sensor, a force sensor, and a displacement sensor; the plurality of mounting bases include a fifth mounting base, a sixth mounting base, and a seventh mounting base; wherein, the step of respectively mounting the plurality of sensors on the corresponding mounting base includes: The acceleration sensor is fixed to the fifth mounting base via a threaded adapter. The force sensor is fixed to the sixth mounting base through a cylindrical hole adapter. The displacement sensor is fixed to the seventh mounting base by a custom bracket and the T-slot.

5. The assembly and adjustment method of the data acquisition system according to claim 1, characterized in that, The signal transmission line adopts a double-layer shielding structure, wherein the inner layer of the signal transmission line is a tin-plated copper mesh, the outer layer of the signal transmission line is an aluminum foil, and the outer layer of the signal transmission line is wrapped with a silicone sheath.

6. The assembly and adjustment method of the data acquisition system according to claim 4, characterized in that, Both the threaded adapter and the cylindrical hole adapter are provided with elastic washers. The data acquisition terminal has a casing made of galvanized steel sheet. The data acquisition terminal also includes an electromagnetic isolation module, which is used to isolate the power supply.

7. The assembly and adjustment method of the data acquisition system according to claim 4, characterized in that, Also includes: Obtain the timestamps from the collected information to determine the collection time of each sensor; Based on the acquisition time of each sensor, the time difference corresponding to each sensor is calculated, and the parameters of the corresponding sensor are corrected according to the time difference and a preset linear interpolation algorithm.

8. A data acquisition system, characterized in that, include: Multiple mounting bases, multiple sensors, and data acquisition terminals, among which, The plurality of mounting bases are respectively installed at preset positions on the vehicle, wherein the preset positions include positions inside the vehicle and positions outside the vehicle; The plurality of sensors are respectively mounted on the corresponding mounting bases; The data acquisition terminal includes an acquisition interface, a master clock module, and a sensor adapter module. The acquisition interface is connected to the master clock module and the sensor adapter module, respectively. Multiple sensors are connected to their respective acquisition interfaces via signal transmission lines.

9. An electronic device, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, the processor executing the program to implement the assembly and adjustment method of the data acquisition system as described in any one of claims 1-7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, The program is executed by the processor to implement the assembly and adjustment method of the data acquisition system as described in any one of claims 1-7.

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