Safety control system and method, medium and whole vehicle rack

Abstract

The embodiment of the invention discloses a safety control system and method, a medium and a whole vehicle rack, and relates to the technical field of vehicles. Wherein the acceleration sensor is used for sending an analog voltage signal of a vibration impact part to the rack controller; the rack controller is used for sending a voltage value indicated by the analog voltage signal to the rack main control computer; and the rack main control computer is used for controlling the whole vehicle rack to stop if the voltage value is greater than a preset voltage threshold value. Therefore, when the voltage value is greater than the preset voltage threshold value, abnormal impact can be determined immediately, and the whole vehicle rack is controlled to stop, so that the problems of delay and even missed judgment caused by determining whether the plate spring is broken or not by depending on manual visual observation and auditory judgment are solved; and structural damage to parts such as a frame and a vehicle body caused by continuous abnormal impact is effectively avoided.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and in particular to a safety control system, method, medium, and vehicle test bench. Background Technology

[0002] Leaf springs are key load-bearing and elastic components in a vehicle's suspension system. Their core function is to bear the vertical load between the axle and the frame and provide necessary cushioning support.

[0003] During the vehicle quality verification phase, durability testing is a crucial step in assessing its reliability. Currently, in durability testing, whether a leaf spring has broken mainly relies on manual identification through visual observation and auditory judgment.

[0004] However, during testing, components such as wheels may obstruct the view, and the testing site may be subject to interference such as vehicle vibration and noise, and noise from cooling fan equipment. Manual identification often suffers from significant delays and may even result in missed detections. Furthermore, if a leaf spring breaks, the suspension stiffness drops sharply, causing abnormal axle bounce and resulting in a sudden, severe impact on the frame, body, and other components. Such delays or missed detections can easily lead to irreversible structural damage to these components. Summary of the Invention

[0005] In view of the above problems, this application provides a safety control system, method, medium and vehicle test bench that can avoid structural damage to components such as the frame and body caused by continuous abnormal impact.

[0006] The embodiments of this application disclose the following technical solutions:

[0007] In a first aspect, this application discloses a safety control system, which includes: an acceleration sensor, a test bench controller, and a test bench main control unit; the acceleration sensor is fixed to the vibration and impact part of the longitudinal beam by a clamping fixture; the acceleration sensor and the test bench controller are connected by a signal line, and the test bench controller and the test bench main control unit are connected by a network cable;

[0008] The acceleration sensor is used to send an analog voltage signal from the vibration and impact site to the test bench controller;

[0009] The test bench controller is used to send the voltage value indicated by the analog voltage signal to the test bench main controller;

[0010] The main control unit of the test bench is used to control the vehicle test bench to stop if the voltage value is greater than a preset voltage threshold.

[0011] Optionally, when the leaf spring buffer block is installed in the middle of the leaf spring, the vibration and impact area is the area before and after the contact area between the leaf spring buffer block and the longitudinal beam; or, when the leaf spring buffer block is installed on the longitudinal beam, the vibration and impact area is the area before and after the installation position of the leaf spring buffer block.

[0012] Optionally, the clamping fixture includes an upper clamping plate and a lower clamping plate, the upper clamping plate and the lower clamping plate being detachably fixed to the upper and lower sides of the vibration and impact part of the longitudinal beam by at least two clamping bolts; the upper clamping plate and / or the lower clamping plate are provided with threaded holes, and the acceleration sensor is fixed in the threaded holes by a threaded connection.

[0013] Optionally, the thickness of both the upper clamping plate and the lower clamping plate is not less than 20 mm.

[0014] Optionally, the preset threshold is determined in the following way:

[0015] With the leaf spring intact, during at least one endurance test cycle of the vehicle test bench, the maximum value of the voltage indicated by multiple analog voltage signals output by the acceleration sensor is obtained.

[0016] A preset threshold is determined by summing the maximum value and the redundancy value; the redundancy value is positively correlated with the maximum value.

[0017] Optionally, the safety control system includes N acceleration sensors; the N acceleration sensors are fixed to N vibration and impact points on the longitudinal beam by N clamping fixtures; N is a positive integer;

[0018] The N acceleration sensors are specifically used to send N analog voltage signals from the N vibration and impact points to the bench controller;

[0019] The bench controller is specifically used to send the N voltage values ​​indicated by the N analog voltage signals to the bench main controller;

[0020] The main control unit of the test bench is specifically used to control the vehicle test bench to stop if there is a voltage value greater than a preset voltage threshold among the N voltage values.

[0021] Optionally, the acceleration sensor is a piezoelectric acceleration sensor with a built-in amplifier.

[0022] Secondly, this application discloses a safety control method applied to a safety control system including an acceleration sensor, a test bench controller, and a test bench main control unit; the acceleration sensor is fixed to the vibration and impact part of the longitudinal beam by a clamping fixture; the acceleration sensor and the test bench controller are connected by a signal line, and the test bench controller and the test bench main control unit are connected by a network cable; the method includes:

[0023] The accelerometer sends an analog voltage signal from the vibration and impact point to the test bench controller;

[0024] The test bench controller sends the voltage value indicated by the analog voltage signal to the test bench main controller;

[0025] If the voltage value is greater than the preset voltage threshold, the main control unit of the test bench will control the vehicle test bench to stop.

[0026] Thirdly, this application discloses a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the security control method as described in the second aspect.

[0027] Fourthly, this application discloses a vehicle test bench, characterized in that the vehicle test bench includes a safety control system as described in the first aspect.

[0028] Compared with the prior art, this application has the following beneficial effects:

[0029] This application discloses a safety control system, method, medium, and vehicle test bench. The safety control system includes an acceleration sensor, a test bench controller, and a test bench main controller. The acceleration sensor is fixed to the vibration and impact point of the longitudinal beam using a clamping fixture. The acceleration sensor and the test bench controller are connected via a signal line, and the test bench controller and the test bench main controller are connected via a network cable. The acceleration sensor sends an analog voltage signal from the vibration and impact point to the test bench controller. The test bench controller sends the voltage value indicated by the analog voltage signal to the test bench main controller. The test bench main controller stops the vehicle test bench if the voltage value exceeds a preset voltage threshold. Therefore, when the voltage value exceeds the preset voltage threshold, an abnormal impact can be immediately identified, and the vehicle test bench can be stopped. This solves the problem of delays or even missed detections caused by relying on manual visual observation and auditory judgment to determine whether a leaf spring has broken, effectively avoiding structural damage to components such as the frame and body caused by continuous abnormal impacts. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 A schematic diagram of a safety control system provided in an embodiment of this application;

[0032] Figure 2 A schematic diagram illustrating a method for fixing an accelerometer according to an embodiment of this application;

[0033] Figure 3 A flowchart illustrating a security control method provided in an embodiment of this application;

[0034] Figure 4 This is a schematic diagram of a computer-readable medium provided in an embodiment of this application. Detailed Implementation

[0035] As described earlier, durability testing is a crucial step in assessing the reliability of a vehicle during the overall quality verification phase. Currently, in durability testing, whether a leaf spring has broken mainly relies on manual identification through visual observation and auditory judgment.

[0036] However, during testing, components such as wheels may obstruct the view, and the testing site may be subject to interference such as vehicle vibration and noise, and noise from cooling fan equipment. Manual identification often suffers from significant delays and may even result in missed detections. Furthermore, if a leaf spring breaks, the suspension stiffness drops sharply, causing abnormal axle bounce and resulting in a sudden, severe impact on the frame, body, and other components. Such delays or missed detections can easily lead to irreversible structural damage to these components.

[0037] Through research, the inventors have disclosed a safety control system, method, medium, and vehicle test bench. When the voltage value exceeds a preset voltage threshold, it can immediately determine that an abnormal impact has occurred and control the vehicle test bench to stop. This solves the problem of delay or even missed detection caused by relying on manual visual observation and auditory judgment to determine whether the leaf spring has broken. It effectively avoids structural damage to components such as the frame and body caused by continuous abnormal impact.

[0038] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0039] See Figure 1 The figure is a schematic diagram of a safety control system provided in an embodiment of this application. The safety control system 10 includes: an acceleration sensor 11, a test bench controller 12, and a test bench main controller 13.

[0040] In one specific implementation, the accelerometer 11 can be a piezoelectric accelerometer with a built-in amplifier. This is because the working principle of a piezoelectric accelerometer is as follows: when the piezoelectric accelerometer is subjected to vibration or impact, the piezoelectric crystal inside undergoes mechanical deformation due to the force. According to the piezoelectric effect, this deformation generates an analog voltage signal proportional to the magnitude of the applied acceleration. Traditional piezoelectric accelerometers output extremely weak analog voltage signals (in the picocoulomb range) and have very high output impedance. During the transmission of the analog voltage signal, it is easily interfered with by environmental noise such as cable movement and electromagnetic fields, resulting in a low signal-to-noise ratio and poor measurement reliability. Therefore, this application can use a piezoelectric accelerometer with a built-in amplifier to amplify the weak analog voltage signal. This not only eliminates the need for a dedicated amplifier circuit in an external signal conditioner or data acquisition card, thus reducing hardware costs and wiring complexity, but also enables the output of an analog voltage signal with stronger anti-interference capabilities, thereby improving the stability and reliability of the analog voltage signal.

[0041] Refer to Table 1, which is a parameter table of a piezoelectric accelerometer with a built-in amplifier provided in an embodiment of this application. It should be noted that the values ​​in Table 1 are merely examples and are not intended to limit the scope of this application.

[0042] Table 1

[0043]

[0044] To ensure the accuracy of the acceleration sensor 11, it needs to be fixed to the vibration and impact area of ​​the longitudinal beam using a clamping fixture. This is because the vibration and impact area of ​​the longitudinal beam is the most prone to impact fracture, thus requiring monitoring of acceleration at these locations. Specifically, when the leaf spring buffer block is installed in the middle of the leaf spring, the vibration and impact area is the area adjacent to the contact point between the leaf spring buffer block and the longitudinal beam; or, when the leaf spring buffer block is installed on the longitudinal beam, the vibration and impact area is the area adjacent to the installation position of the leaf spring buffer block.

[0045] See Figure 2 This figure is a schematic diagram of a fixing method for an accelerometer provided in an embodiment of this application. Figure 2 As shown, the clamping fixture includes an upper clamping plate 1 and a lower clamping plate 6. The upper clamping plate 1 and the lower clamping plate 6 are secured by at least two clamping bolts. Figure 2 The left clamping bolt 7 and the right clamping bolt 3 are detachably fixed to the upper and lower sides of the vibration and impact part of the longitudinal beam 2 to form a stable clamping structure.

[0046] Furthermore, the upper clamping plate 1 and / or the lower clamping plate 6 are provided with threaded holes, and the acceleration sensor 11 itself is also threaded. The acceleration sensor 11 can be directly fixed in the threaded hole by the threaded connection, thereby achieving a rigid connection and preventing the acceleration sensor 11 from loosening or displacing in the vibration environment.

[0047] It should be noted that the accelerometer 11 can be flexibly installed in any location depending on the available space and measurement requirements. For example, it can be installed on the upper clamping plate 1 or the lower clamping plate 6, or on the left or right side of the longitudinal beam 2. Figure 2 The image shows the installation on the right side of the lower clamping plate 6 and the longitudinal beam 2.

[0048] It should also be noted that, to prevent deformation of the upper clamping plate 1 or the lower clamping plate 6 during the clamping process, and to ensure stable support of the accelerometer sensor 11 by the upper clamping plate 1 or the lower clamping plate 6, the thickness of both the upper clamping plate 1 and the lower clamping plate 6 is not less than 20mm. This ensures that the upper clamping plate 1 and the lower clamping plate 6 have strong versatility and rigidity, while also ensuring that the large and heavy accelerometer sensor 11 can be firmly fixed to the side of the longitudinal beam 2 without interference.

[0049] It should also be noted that, through Figure 2The method of fixing the acceleration sensor 11 has the following advantages: First, vehicles with leaf springs usually have a longitudinal beam 2, and fixing the acceleration sensor 11 to the longitudinal beam 2 does not require any changes to the overall vehicle structure, making it universal. Second, the vertical cross-section of the longitudinal beam 2 is high, and the space between the upper clamping plate 1 and the lower clamping plate 6 is sufficient to accommodate the relatively large acceleration sensor 11, avoiding spatial interference problems. Third, the longitudinal beam 2 is located above the axle and leaf springs, and fixing the acceleration sensor 11 to the longitudinal beam 2 avoids all moving parts below, ensuring the physical safety of the acceleration sensor 11 and its signal lines, and reducing interference signals caused by non-target vibration sources.

[0050] S101: Accelerometer 11 is used to send an analog voltage signal from the vibration impact point to bench controller 12.

[0051] Accelerometer 11 detects the mechanical acceleration of the vibrating and impacted parts on the longitudinal beam and converts the acceleration into an analog voltage signal according to its built-in linear relationship (e.g., 0V corresponds to 0g, 5V corresponds to 50g). This analog voltage signal can indicate the acceleration value of the vibrating and impacted parts.

[0052] Accelerometer 11 and bench controller 12 are connected via signal lines (e.g. Figure 2 4) Connection. For example, the signal lines can be a four-wire connection. Two of the lines are power supply lines, used to provide operating power to the accelerometer 11; the other two are signal lines, specifically used to transmit analog voltage signals.

[0053] Furthermore, the aforementioned power supply is not drawn from the vehicle's own battery, but is supplied separately by a stable 12V DC power source converted from 220V AC mains power. This provides a continuous and clean power supply, completely avoiding the impact of on-board battery voltage fluctuations (such as voltage disturbances caused by engine start-stop) on the working accuracy of the acceleration sensor 11. Moreover, it ensures that the acceleration sensor 11 can continue to operate normally under any vehicle condition (e.g., engine off, battery depleted), fundamentally eliminating the risk of monitoring failure due to onboard power supply issues.

[0054] It is understood that the embodiments of this application adopt wired direct transmission of signal lines, which has the following significant advantages compared with wireless transmission schemes: First, it eliminates the signal transmitting and receiving devices necessary for wireless transmission, reducing the complexity and potential failure points of the safety control system 10. Second, it avoids signal interference, delay, or loss problems that may occur in wireless transmission, ensuring that the analog voltage signal can be delivered in real time and with high fidelity.

[0055] S102: The bench controller 12 is used to send the voltage value indicated by the analog voltage signal to the bench main controller 13.

[0056] The test bench controller 12 receives the analog voltage signal from the accelerometer 11 and converts it into a digital voltage value.

[0057] The bench controller 12 and the bench main controller 13 are connected by a network cable to achieve high-speed and reliable transmission of monitored voltage values ​​and instant issuance of control commands.

[0058] S103: The main controller 13 of the test bench is used to control the entire vehicle test bench to stop if the voltage value is greater than the preset voltage threshold.

[0059] If the voltage value exceeds the preset voltage threshold, the main control unit 13 of the test bench controls the entire vehicle test bench to shut down. This shutdown is not abrupt power cut-off, but a controlled and smooth shutdown process with interlocked procedures. Therefore, on the one hand, the smooth interruption of operation avoids the risks of severe mechanical shock and sudden changes in power system load caused by abrupt stops, effectively preventing secondary damage to the test bench equipment or other components of the vehicle under test, or causing the vehicle to lose control. On the other hand, the controlled shutdown ensures that all moving parts stop precisely at the moment the threshold is triggered. This provides engineers with a complete "fault scene," facilitating direct observation of the leaf spring fracture morphology, the impact wave and its range, and the inspection of other related effects, greatly simplifying and accelerating the root cause analysis and diagnosis process.

[0060] In one specific implementation, the preset threshold can be determined as follows: First, with the leaf spring intact, the vehicle test bench is controlled to complete at least one full durability test cycle. During this cycle, the maximum voltage value (representing the peak load under normal operating conditions) from multiple analog voltage signals output by the accelerometer is continuously acquired. Then, the preset threshold is determined by summing the maximum value and the redundancy value (positively correlated with the maximum value). This method ensures that the preset threshold is slightly higher than the normal vibration range, enabling highly sensitive detection of abnormal impact events such as leaf spring breakage while effectively filtering out fluctuations under normal operating conditions. This minimizes the risk of accidental shutdowns and ensures the continuity and efficiency of the test.

[0061] In one specific implementation, to achieve comprehensive monitoring of the longitudinal beam, the safety control system can include N acceleration sensors (N being a positive integer). These N acceleration sensors are fixed to N vibration and impact points on the longitudinal beam via N clamping fixtures. Specifically, the N acceleration sensors send N analog voltage signals from the N vibration and impact points to the test bench controller; the test bench controller then sends N voltage values ​​indicated by these analog voltage signals to the test bench main controller; and the test bench main controller stops the entire vehicle test bench if any of the N voltage values ​​exceeds a preset voltage threshold. This achieves simultaneous monitoring of multiple potential weak points or different impact transmission paths, significantly improving the safety control system's ability to detect local faults and the overall reliability of monitoring, eliminating blind spots.

[0062] It should be noted that after the vehicle test bench is shut down, the leaf springs can be identified manually through visual observation and auditory judgment to determine whether they are broken.

[0063] In summary, the embodiments of this application disclose a safety control system that can immediately determine the occurrence of an abnormal impact when the voltage value is greater than a preset voltage threshold, and control the entire vehicle test bench to stop. This solves the problem of delay or even missed detection caused by relying on manual visual observation and auditory judgment to determine whether the leaf spring has broken, and effectively avoids structural damage to components such as the frame and body caused by continuous abnormal impact.

[0064] See Figure 3 This figure is a flowchart of a safety control method provided in an embodiment of this application. The method is applied to a safety control system including an acceleration sensor, a test bench controller, and a test bench main control unit; the acceleration sensor is fixed to the vibration and impact point of the longitudinal beam by a clamping fixture; the acceleration sensor and the test bench controller are connected by a signal line, and the test bench controller and the test bench main control unit are connected by a network cable; the method includes:

[0065] S301: The accelerometer sends an analog voltage signal from the vibration and impact point to the test bench controller.

[0066] In one specific implementation, when the leaf spring buffer block is installed in the middle of the leaf spring, the vibration and impact area is the area before and after the contact area between the leaf spring buffer block and the longitudinal beam; or, when the leaf spring buffer block is installed on the longitudinal beam, the vibration and impact area is the area before and after the installation position of the leaf spring buffer block.

[0067] In one specific implementation, the clamping fixture includes an upper clamping plate and a lower clamping plate, which are detachably fixed to the upper and lower sides of the vibration and impact part of the longitudinal beam by at least two clamping bolts; the upper clamping plate and / or the lower clamping plate are provided with threaded holes, and the acceleration sensor is fixed in the threaded holes by threaded connection.

[0068] In one specific implementation, the thickness of both the upper and lower clamping plates is not less than 20mm.

[0069] S302: The bench controller sends the voltage value indicated by the analog voltage signal to the bench main controller.

[0070] S303: If the voltage value is greater than the preset voltage threshold, the main controller of the test bench will control the entire vehicle test bench to stop.

[0071] In one specific implementation, the preset threshold is determined as follows: with the leaf spring in an unbroken state, during at least one endurance test cycle of the controlled vehicle test bench, the maximum value among the voltage values ​​indicated by multiple analog voltage signals output by the acceleration sensor is obtained; the preset threshold is determined based on the sum of the maximum value and the redundancy value; the redundancy value is positively correlated with the maximum value.

[0072] In one specific implementation, the safety control system includes N acceleration sensors; the N acceleration sensors are fixed to N vibration and impact points on the longitudinal beam by N clamping fixtures; N is a positive integer;

[0073] Accelerometers send analog voltage signals from vibration and impact points to the test bench controller, including: N accelerometers sending N analog voltage signals from N vibration and impact points to the test bench controller;

[0074] The voltage value indicated by the analog voltage signal sent to the test bench main controller includes: sending N voltage values ​​indicated by N analog voltage signals to the test bench main controller;

[0075] If the voltage value is greater than the preset voltage threshold, the test bench main controller will control the vehicle test bench to stop, including: if among N voltage values, there is a voltage value greater than the preset voltage threshold, the test bench main controller will control the vehicle test bench to stop.

[0076] In summary, the embodiments of this application disclose a safety control method that can immediately determine the occurrence of an abnormal impact when the voltage value is greater than a preset voltage threshold, and control the entire vehicle test bench to stop. This solves the problem of delay or even missed judgment caused by relying on manual visual observation and auditory judgment to determine whether the leaf spring has broken, and effectively avoids structural damage to components such as the frame and body caused by continuous abnormal impact.

[0077] This application discloses a vehicle testing bench, characterized in that the vehicle testing bench includes the safety control system described in the first aspect. This vehicle testing bench possesses the beneficial effects of the safety control system described in the first aspect.

[0078] See Figure 4This figure is a schematic diagram of a computer-readable medium provided in an embodiment of this application. The computer-readable medium 400 stores a computer program 411, which, when executed by a processor, implements the above-described... Figure 3 The steps of the safety control method.

[0079] It should be noted that, in the context of this application, a machine-readable medium can be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, apparatus, or device. A machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. Machine-readable media can be, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0080] It should be noted that the machine-readable medium described above in this application can be a computer-readable signal medium or a computer-readable storage medium, or any combination of the two. A computer-readable storage medium can be, for example,—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of a computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this application, a computer-readable storage medium can be any tangible medium containing or storing a program that can be used by or in conjunction with an instruction execution system, apparatus, or device. In this application, a computer-readable signal medium can include a data signal propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals can take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination thereof. A computer-readable signal medium can be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The program code contained on the computer-readable medium can be transmitted using any suitable medium, including but not limited to: wires, optical fibers, RF (radio frequency), etc., or any suitable combination thereof.

[0081] The aforementioned computer-readable medium may be included in the aforementioned electronic device; or it may exist independently and not assembled into the electronic device.

[0082] Although the subject matter has been described using language specific to structural features and / or methodological logic, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or actions described above. Rather, the specific features and actions described above are merely illustrative examples of implementing the claims.

[0083] While several specific implementation details are included in the foregoing discussion, these should not be construed as limiting the scope of this application. Certain features described in the context of individual embodiments may also be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment may also be implemented individually or in any suitable sub-combination in multiple embodiments.

[0084] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of disclosure in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the above-described concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A safety control system, characterized in that, The safety control system includes: an acceleration sensor, a test bench controller, and a test bench main control unit; the acceleration sensor is fixed to the vibration and impact part of the longitudinal beam by a clamping fixture; the acceleration sensor and the test bench controller are connected by a signal line, and the test bench controller and the test bench main control unit are connected by a network cable; The acceleration sensor is used to send an analog voltage signal from the vibration and impact site to the test bench controller; The test bench controller is used to send the voltage value indicated by the analog voltage signal to the test bench main controller; The main control unit of the test bench is used to control the vehicle test bench to stop if the voltage value is greater than a preset voltage threshold.

2. The system according to claim 1, characterized in that, When the leaf spring buffer block is installed in the middle of the leaf spring, the vibration and impact area is the area before and after the contact area between the leaf spring buffer block and the longitudinal beam; or, when the leaf spring buffer block is installed on the longitudinal beam, the vibration and impact area is the area before and after the installation position of the leaf spring buffer block.

3. The system according to claim 1, characterized in that, The clamping fixture includes an upper clamping plate and a lower clamping plate. The upper clamping plate and the lower clamping plate are detachably fixed to the upper and lower sides of the vibration and impact part of the longitudinal beam by at least two clamping bolts. The upper clamping plate and / or the lower clamping plate are provided with threaded holes, and the acceleration sensor is fixed in the threaded holes by threaded connection.

4. The system according to claim 3, characterized in that, The thickness of both the upper clamping plate and the lower clamping plate is not less than 20mm.

5. The system according to claim 1, characterized in that, The preset threshold is determined in the following way: With the leaf spring intact, during at least one endurance test cycle of the vehicle test bench, the maximum value of the voltage indicated by multiple analog voltage signals output by the acceleration sensor is obtained. A preset threshold is determined by summing the maximum value and the redundancy value; the redundancy value is positively correlated with the maximum value.

6. The system according to claim 1, characterized in that, The safety control system includes N acceleration sensors; the N acceleration sensors are fixed to N vibration and impact points on the longitudinal beam by N clamping fixtures; N is a positive integer; The N acceleration sensors are specifically used to send N analog voltage signals from the N vibration and impact points to the bench controller; The bench controller is specifically used to send the N voltage values ​​indicated by the N analog voltage signals to the bench main controller; The main control unit of the test bench is specifically used to control the vehicle test bench to stop if there is a voltage value greater than a preset voltage threshold among the N voltage values.

7. The system according to claim 1, characterized in that, The accelerometer is a piezoelectric accelerometer with a built-in amplifier.

8. A safety control method, characterized in that, An application is made in a safety control system comprising an accelerometer, a test bench controller, and a test bench main controller; the accelerometer is fixed to the vibration and impact point of the longitudinal beam using a clamping fixture; the accelerometer and the test bench controller are connected via a signal line, and the test bench controller and the test bench main controller are connected via a network cable; the method includes: The accelerometer sends an analog voltage signal from the vibration and impact point to the test bench controller; The test bench controller sends the voltage value indicated by the analog voltage signal to the test bench main controller; If the voltage value is greater than the preset voltage threshold, the main control unit of the test bench will control the vehicle test bench to stop.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the security control method as described in claim 8.

10. A vehicle testing platform, characterized in that, The vehicle test bench includes the safety control system as described in any one of claims 1-7.

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