A redundant trigger control system and method

Abstract

This invention belongs to the field of trigger control technology, specifically relating to a redundant trigger control system and method. This redundant trigger control system combines a mechanical trigger module and an electronic trigger module. The mechanical trigger module uses a mass block and inertial spring structure to achieve multi-directional triggering functionality; the electronic trigger module uses a triaxial accelerometer and a "threshold + sliding time window" algorithm to provide precise electronic trigger signals. The two trigger modules operate independently, and a logical "OR" operation is used for judgment through a decision output module, significantly improving the system's reliability and safety. The aforementioned redundant trigger control system is suitable for various application scenarios requiring high-reliability triggering.

Description

Technical Field

[0001] This invention belongs to the field of trigger control technology, specifically relating to a redundant trigger control system and method. Background Technology

[0002] In existing technologies, trigger control systems typically employ a single detection mechanism. While mechanical trigger switches are simple in structure and inexpensive, they often suffer from problems such as high directional sensitivity, fixed response thresholds, and poor adaptability. For example, traditional inertial switches can usually only reliably trigger in a specific direction, making them poorly adaptable to multi-directional impact environments.

[0003] While electronic triggering systems can detect multiple parameters through sensors, their reliability is affected by various factors such as the performance of electronic components, algorithm complexity, and environmental interference. Under extreme environmental conditions, such as strong electromagnetic interference or alternating high and low temperatures, the electronic system may experience false triggering or failure.

[0004] Especially in safety-critical applications, such as vehicle airbag deployment and emergency braking of industrial equipment, system malfunctions or failures can lead to serious consequences. Therefore, there is an urgent need in this field for a trigger control scheme that combines the advantages of mechanical and electronic triggering, offering higher reliability and adaptability. Summary of the Invention

[0005] This invention provides a redundant trigger control system and method, which achieves a higher level of reliability and safety by organically combining mechanical triggering and electronic triggering mechanisms.

[0006] To achieve the above objectives, the present invention adopts the following specific technical solution:

[0007] First, the present invention provides a redundant triggering control system, which includes a mechanical triggering module, an electronic triggering module, a signal processing module, and a decision output module; The mechanical triggering module includes a multi-directional triggering switch capable of generating a triggering signal under impact in any direction, used to generate a mechanical triggering signal when there is an impact in any direction; The electronic triggering module is used to detect acceleration signals and send the detected acceleration signals to the signal processing module; The signal processing module is connected to the electronic triggering module and is used to calculate the velocity change based on the received acceleration signal, and generate an electronic triggering signal when the velocity change exceeds a set threshold. The decision output module is connected to the mechanical trigger module and the signal processing module, and is used to receive signals from the mechanical trigger module and the signal processing module, and perform a logical "OR" operation on the received signals. When any trigger signal is valid, the system trigger signal is immediately output.

[0008] Furthermore, the multi-directional trigger switch includes a housing, a cubic mass block, a guide structure, an inertial spring, a flexible electrode, and a fixed electrode; The cubic mass block, the guiding structure, the flexible electrode, and the fixed electrode are distributed sequentially from top to bottom within the outer shell along the height direction of the outer shell; The fixed electrode is fixedly installed at the bottom end of the housing and is positioned opposite to the flexible electrode; The guide structure slides into the inner wall of the outer shell and is provided with a groove that matches the shape of the bottom end of the cubic mass block; the groove is surrounded by an arc-shaped surface with a gradually increasing opening. The flexible electrode is fixedly installed on the end of the guide structure facing the fixed electrode; The bottom of the cubic mass block is located in the groove and has rounded corners on all four sides. The top of the block abuts against the outer shell and can respond to impacts in any direction and drive the guide structure to slide toward the fixed electrode. The inertial spring abuts between the guide structure and the fixed electrode, and the stiffness of the inertial spring is such that the flexible electrode remains disconnected from the fixed electrode under a first impact threshold and the flexible electrode contacts the fixed electrode under a second impact threshold. A trigger signal is generated when the cubic mass block drives the guide structure to move toward the fixed electrode under impact and the flexible electrode comes into contact with the fixed electrode.

[0009] Furthermore, the outer shell is made of high-strength stainless steel; the cubic mass block is made of tungsten steel; and the flexible electrode and the fixed electrode are made of gold-plated copper. The inertial spring is made of stainless steel.

[0010] Furthermore, the stiffness of the inertial spring is 859 N / m; the distance between the flexible electrode and the fixed electrode is 0.35 mm; the first impact threshold is set to 40 g, and the second impact threshold is set to 180 g.

[0011] Furthermore, the electronic triggering module includes a triaxial accelerometer, a signal conditioning circuit, and an analog-to-digital converter; The triaxial accelerometer is used to simultaneously detect acceleration signals in three directions; The signal conditioning circuit includes a filter and an amplifier, used to preprocess the sensor signals acquired by the triaxial accelerometer. The analog-to-digital converter is used to perform analog-to-digital conversion on the signal preprocessed by the signal conditioning circuit.

[0012] Furthermore, the triaxial accelerometer is a piezoresistive MEMS sensor with a triaxial sensing structure and a Wheatstone bridge. The triaxial sensing structure integrates sensitive resistor beams in the X, Y, and Z directions respectively. When subjected to acceleration, it outputs a corresponding voltage signal through the Wheatstone bridge.

[0013] Furthermore, the signal processing module uses a "threshold + sliding time window" algorithm to analyze and process the acceleration signal collected by the triaxial accelerometer. The specific process is as follows: data is collected at a fixed sampling frequency, a fixed-length time window is set, the velocity change is calculated using a numerical integration method, and the total velocity change is obtained through vector synthesis; when the total velocity change exceeds the set threshold, an electronic trigger signal is generated.

[0014] Furthermore, numerical integration is performed using the composite trapezoidal rule:

[0015] in, a , b The integration interval is the period of integration. n To divide the integration period into n equal parts, let n = n. h =( b - a ) / n , points k = (0, 1, ..., n).

[0016] Furthermore, the decision output module uses hardware logic circuits to implement the logical "OR" operation.

[0017] In addition, the present invention also provides a redundant trigger control method employing the above-mentioned redundant trigger control system, the trigger control method comprising: Impact signals are detected via a mechanical trigger module; Acceleration signals are detected via an electronic trigger module; The output trigger signal is determined by using a logical "OR" operation.

[0018] Compared with the prior art, the technical solution of the present invention has the following beneficial effects: The redundant trigger control system of this invention significantly improves system reliability by employing both mechanical and electronic triggering mechanisms. The mechanical trigger module adopts a multi-directional design, overcoming the directional limitations of traditional mechanical switches; the electronic trigger module uses advanced algorithms to improve the accuracy and adaptability of triggering; the mechanical and electronic trigger modules work independently and serve as backups for each other, ensuring that the system can still function normally even if a single trigger module fails.

[0019] The redundant triggering control system of the present invention is suitable for various application scenarios that require high-reliability triggering, and has important practical value and broad application prospects. Attached Figure Description

[0020] Figure 1 This is a schematic diagram illustrating the principle of the redundant triggering control system of the present invention; Figure 2 This is a structural schematic diagram of the mechanical trigger module; Figure 3 The balancing circuit diagram for the decision output module; Figure 4 This is a flowchart of the redundant trigger control system.

[0021] Figure label: 1-Mechanical trigger module, 2-Electronic trigger module, 3-Signal processing module, 4-Decision output module, 11-Housing shell, 12-Cube-shaped mass block, 13-Guiding structure, 14-Inertia spring, 15-Flexible electrode, 16-Fixed electrode, 17-Base, 18-Base plate. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] In the description of this invention, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances. Furthermore, in the description of this invention, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0024] Example 1 This embodiment provides a redundant triggering control system, such as Figure 1 As shown, this redundant trigger control system includes a mechanical trigger module 1, an electronic trigger module 2, a signal processing module 3, and a decision output module 4. These modules are electrically connected for signal transmission and data exchange. Specifically: the mechanical trigger module 1 includes a multi-directional trigger switch capable of generating a trigger signal under impact in any direction, used to generate a mechanical trigger signal when impact occurs in any direction. The electronic trigger module 2 detects acceleration signals and sends them to the signal processing module 3. The signal processing module 3, connected to the electronic trigger module 2, calculates the velocity change based on the received acceleration signal and generates an electronic trigger signal when the velocity change exceeds a set threshold. The decision output module 4, connected to both the mechanical trigger module 1 and the signal processing module 3, receives signals from both modules and performs a logical OR operation on the received signals. When either trigger signal is valid, a system trigger signal is immediately output. The decision output module 4 uses hardware logic circuitry to implement the logical OR operation. The mechanical and electronic trigger signals are optically isolated and then sent to a logic chip. When either signal is high, a system trigger signal is output, thus achieving true redundancy.

[0025] In the aforementioned redundant trigger control system, such as Figure 2 As shown, the multi-directional trigger switch includes a housing 11, a cubic mass block 12, a guide structure 13, an inertial spring 14, a flexible electrode 15, and a fixed electrode 16. The housing 11, serving as a stop structure, is made of high-strength stainless steel. The cubic mass block 12 is made of tungsten carbide. The flexible electrode 15 and the fixed electrode 16 are made of gold-plated copper to ensure good conductivity. The inertial spring 14 is made of stainless steel. The cubic mass block 12, guide structure 13, inertial spring 14, flexible electrode 15, and fixed electrode 16 are all installed inside the housing 11, as shown. Figure 2As shown, along the height direction of the outer shell, the cubic mass block, the guide structure, the flexible electrode, and the fixed electrode are distributed sequentially from top to bottom within the outer shell. The fixed electrode 16 and the flexible electrode 15 are positioned opposite each other. The fixed electrode 16 is fixedly mounted to the bottom end of the outer shell 11 via a base 17 and a bottom plate 18, and is fixed relative to the outer shell 11. The guide structure 13 slides against the inner wall of the outer shell 11 and has a groove that matches the shape of the bottom end of the cubic mass block 12; the groove forms an arc-shaped surface with gradually increasing openings around its perimeter; the guide structure 13 can slide along the arrangement direction of the fixed electrode 16 and the flexible electrode 15. The flexible electrode 15 is fixedly mounted on the end of the guide structure 13 facing the fixed electrode 16, allowing the flexible electrode 15 to slide towards or away from the fixed electrode 16 under the guidance and drive of the guide structure 13. When the impact is strong enough, the cubic mass block 12 can drive the guide structure 13 to slide towards the fixed electrode 16, causing the flexible electrode 15 to contact and conduct with the fixed electrode 16, thereby generating a trigger signal. The bottom end of the cubic mass block 12 is located in the groove at the top of the guide structure 13, and the top end of the cubic mass block 12 abuts against the outer shell 11. The bottom end of the cubic mass block 12 has rounded corners on all four sides, allowing it to slide smoothly against the curved surfaces around the groove. Since the top end of the cubic mass block 12 is limited by the outer shell 11, under impact, when the cubic mass block 12 moves horizontally, it can push the guide structure 13 downwards through the sliding of the rounded and curved surfaces. When the cubic mass block 12 moves vertically, it can directly push the guide structure 13 downwards, allowing the cubic mass block 12 to respond to impacts in any direction and drive the guide structure 13 to slide towards the fixed electrode 16. An inertia spring 14 abuts between the guide structure 13 and the fixed electrode 16. When there is no impact, the inertia spring 14 causes the end of the cubic mass block 12 away from the guide structure 13 to abut against the inner top wall of the outer shell 11. The stiffness of the inertial spring 14 is precisely calculated to ensure reliable triggering at a set threshold. The circuit remains open at the first impact threshold and reliably connected at the second impact threshold. That is, the stiffness of the inertial spring 14 ensures that the flexible electrode 15 remains open at the first impact threshold and that the flexible electrode 15 contacts the fixed electrode 16 at the second impact threshold. When the cubic mass block 12 drives the guide structure 13 to move toward the fixed electrode 16 under the action of impact and the flexible electrode 15 contacts the fixed electrode 16, a trigger signal is generated.

[0026] The first impact threshold is set to 40g, and the second impact threshold is set to 180g, such that the inertial spring 14 satisfies the following conditions: under a 40g impact, the flexible electrode 15 remains disconnected from the fixed electrode 16, and under a 180g impact, the flexible electrode 15 and the fixed electrode 16 make reliable contact. In this embodiment, the stiffness of the inertial spring 14 is 859 N / m; the distance between the flexible electrode 15 and the fixed electrode 16 is 0.35 mm.

[0027] In one specific embodiment, the electronic triggering module 2 includes a triaxial accelerometer, a signal conditioning circuit, and an analog-to-digital converter; the triaxial accelerometer is used to simultaneously detect acceleration signals in three directions; the signal conditioning circuit includes a filter and an amplifier, used to preprocess the sensor signals acquired by the triaxial accelerometer; the analog-to-digital converter is used to perform analog-to-digital conversion on the signals preprocessed by the signal conditioning circuit. Figure 3 As shown, the triaxial accelerometer adopts a piezoresistive MEMS sensor and has a triaxial sensing structure and a Wheatstone bridge. The triaxial sensing structure integrates sensitive resistor beams in the X, Y, and Z directions respectively. When subjected to acceleration, it outputs a corresponding voltage signal through the Wheatstone bridge.

[0028] Furthermore, signal processing module 3 employs a "threshold + sliding time window" algorithm to analyze and process the acceleration signals acquired by the triaxial accelerometer. The specific process is as follows: data is acquired at a fixed sampling frequency, such as 200kHz; a fixed-length time window is set for data buffering, such as 3ms; the velocity change is calculated using numerical integration, and the total velocity change is obtained through vector synthesis; when the total velocity change exceeds a set threshold, an electronic trigger signal is generated, with the threshold being 10m / s². Numerical integration is performed using the composite trapezoidal rule.

[0029] in, a , b The integration interval is the period of integration. n To divide the integration period into n equal parts, let n = n. h =( b - a ) / n , points k = (0, 1, ..., n).

[0030] like Figure 4 As shown, a specific implementation step of the "threshold + sliding time window" algorithm used by signal processing module 3 is as follows: 1. Data Acquisition: Synchronously acquire triaxial acceleration data at a sampling rate of 200kHz; 2. Sliding window: Set a 3ms time window, corresponding to 600 sampling points; 3. Numerical Integration: The velocity changes of each axis are calculated using the composite trapezoidal rule. x For example, the shaft:

[0031] In the above formula, For time windows T Internal accelerometer x Change in shaft velocity; For time windows The acceleration value within; The value is related to the time window size and the sampling rate and satisfies .

[0032] 4. Vector composition: Calculate the total change in velocity:

[0033] in, The vector sum of the total velocity changes. , , It represents the change in velocity of acceleration in the three axes.

[0034] 5. Threshold comparison: When Δ v A trigger signal is generated when the speed is >10m / s.

[0035] The aforementioned redundant trigger control system also includes a system self-test function, which can periodically detect the working status of each module.

[0036] Example 2 This embodiment provides a redundant trigger control method employing the above-described redundant trigger control system. The trigger control method includes: The impact signal is detected by the mechanical trigger module 1; Acceleration signals are detected by electronic trigger module 2; The system uses a logical OR operation to comprehensively determine the output trigger signal and execute the corresponding protection or control action.

[0037] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the invention. Therefore, if these modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and variations.

[0038] In summary, the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0039] Example 3 This embodiment provides a specific scheme for a redundant trigger control system, such as... Figure 4 As shown, this scheme combines an inertial power-on switch with an accelerometer through redundant design, achieving a dual judgment mechanism and increasing trigger reliability. When subjected to a high overload impact, the inertial power-on switch senses the overload information in the environment, while the accelerometer collects acceleration information. For the inertial power-on switch, when the overload information exceeds its closing threshold, the switch closes and outputs a trigger signal. After collecting the overload data, the accelerometer integrates the data using a "threshold + sliding time window" to obtain the velocity change within a 3ms time window, comparing it with a preset velocity change threshold. When the calculated velocity change exceeds the preset velocity change threshold, an ignition signal is output. Compared to a single-method ignition system, this scheme, through redundant design, enhances the system's robustness and fault tolerance. Even if the inertial power-on switch fails to close due to mechanical failure, the sensor can still complete the ignition judgment through the algorithm, reducing the risk of system paralysis due to the failure of a single component. Furthermore, its modularity and configurability enable it to flexibly adapt to diverse needs. For example, the inertial power switch and the triaxial accelerometer can be designed as independent modules, allowing for individual module upgrades or maintenance, thus reducing the overall system iteration cost.

Claims

1. A redundant triggering control system, characterized in that, It includes a mechanical triggering module, an electronic triggering module, a signal processing module, and a decision output module; The mechanical triggering module includes a multi-directional triggering switch capable of generating a triggering signal under impact in any direction, used to generate a mechanical triggering signal when there is an impact in any direction; The electronic triggering module is used to detect acceleration signals and send the detected acceleration signals to the signal processing module; The signal processing module is connected to the electronic triggering module and is used to calculate the velocity change based on the received acceleration signal, and generate an electronic triggering signal when the velocity change exceeds a set threshold. The decision output module is connected to the mechanical trigger module and the signal processing module, and is used to receive signals from the mechanical trigger module and the signal processing module, and perform a logical "OR" operation on the received signals. When any trigger signal is valid, the system trigger signal is immediately output.

2. The redundant triggering control system as described in claim 1, characterized in that, The multi-directional trigger switch includes a housing, a cubic mass block, a guide structure, an inertial spring, a flexible electrode, and a fixed electrode; The cubic mass block, the guiding structure, the flexible electrode, and the fixed electrode are distributed sequentially from top to bottom within the outer shell along the height direction of the outer shell; The fixed electrode is fixedly installed at the bottom end of the housing and is positioned opposite to the flexible electrode; The guide structure slides into the inner wall of the outer shell and is provided with a groove that matches the shape of the bottom end of the cubic mass block; the groove is surrounded by an arc-shaped surface with a gradually increasing opening. The flexible electrode is fixedly installed on the end of the guide structure facing the fixed electrode; The bottom of the cubic mass block is located in the groove and has rounded corners on all four sides. The top of the block abuts against the outer shell and can respond to impacts in any direction and drive the guide structure to slide toward the fixed electrode. The inertial spring abuts between the guide structure and the fixed electrode, and the stiffness of the inertial spring is such that the flexible electrode remains disconnected from the fixed electrode under a first impact threshold and the flexible electrode contacts the fixed electrode under a second impact threshold. A trigger signal is generated when the cubic mass block drives the guide structure to move toward the fixed electrode under impact and the flexible electrode comes into contact with the fixed electrode.

3. The redundant triggering control system as described in claim 2, characterized in that, The outer shell is made of high-strength stainless steel; the cubic mass block is made of tungsten steel; the flexible electrode and the fixed electrode are made of gold-plated copper. The inertial spring is made of stainless steel.

4. The redundant triggering control system as described in claim 3, characterized in that, The stiffness of the inertial spring is 859 N / m; the distance between the flexible electrode and the fixed electrode is 0.35 mm; the first impact threshold is set to 40 g, and the second impact threshold is set to 180 g.

5. The redundant triggering control system as described in claim 1, characterized in that, The electronic triggering module includes a triaxial accelerometer, a signal conditioning circuit, and an analog-to-digital converter; The triaxial accelerometer is used to simultaneously detect acceleration signals in three directions; The signal conditioning circuit includes a filter and an amplifier, used to preprocess the sensor signals acquired by the triaxial accelerometer. The analog-to-digital converter is used to perform analog-to-digital conversion on the signal preprocessed by the signal conditioning circuit.

6. The redundant triggering control system as described in claim 5, characterized in that, The triaxial accelerometer is a piezoresistive MEMS sensor with a triaxial sensing structure and a Wheatstone bridge. The triaxial sensing structure integrates sensitive resistor beams in the X, Y, and Z directions respectively. When subjected to acceleration, it outputs a corresponding voltage signal through the Wheatstone bridge.

7. The redundant triggering control system as described in claim 6, characterized in that, The signal processing module uses a "threshold + sliding time window" algorithm to analyze and process the acceleration signal collected by the triaxial accelerometer. The specific process is as follows: data is collected at a fixed sampling frequency, a fixed-length time window is set, the velocity change is calculated using a numerical integration method, and the total velocity change is obtained through vector synthesis. When the total velocity change exceeds a set threshold, an electronic trigger signal is generated.

8. The redundant triggering control system as described in claim 7, characterized in that, Numerical integration is performed using the composite trapezoidal rule: in, a , b The integration interval is the period of integration. n To divide the integration period into n equal parts, let n = n. h =( b - a ) / n , points k = (0, 1, ..., n).

9. The redundant triggering control system according to any one of claims 1-8, characterized in that, The decision output module uses hardware logic circuits to implement the logical "OR" operation.

10. A redundant trigger control method employing the redundant trigger control system according to any one of claims 1-9, characterized in that, include: Impact signals are detected via a mechanical trigger module; Acceleration signals are detected via an electronic trigger module; The logical "OR" operation is used to comprehensively determine the output trigger signal.

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