Method and device for detecting opening force of belt buckle of automobile safety belt

Abstract

The embodiment of the invention discloses an automobile safety belt buckle opening force detection method and device, and relates to the technical field of automobile safety performance detection. According to the scheme, the safety belt is fixed to an opening force detection device, the tension of the safety belt is adjusted according to tension parameters corresponding to a to-be-detected safety belt, and under the tension, a belt buckle of the safety belt is pressed according to the tension parameters corresponding to the to-be-detected safety belt, and the opening force detection device detects the opening force of the safety belt according to detection parameters of the to-be-detected safety belt. The pulling force and opening force of the safety belt are automatically adjusted, the automation degree of automobile safety belt buckle opening force detection is improved, and the detection operation is simplified.

Description

Technical Field

[0001] The present application relates to the technical field of automobile safety performance testing, and in particular to a method and device for testing the opening force of an automobile seat belt buckle. Background Art

[0002] Seat belt buckle devices can be installed inside power-driven vehicles to reduce the wearer's injury risk by limiting the wearer's body movement in the event of a collision or sudden deceleration of the vehicle. As an important component connecting the seat belt to the vehicle, the opening force of the seat belt buckle directly affects the efficiency and safety of the passengers' evacuation in an emergency. Therefore, the detection of the opening force of the car seat belt buckle becomes particularly important.

[0003] In the currently used opening force detection method, it is necessary to manually adjust the tension and opening force of the seat belt, which consumes a lot of manpower and is complicated to operate. Summary of the invention

[0004] The embodiments of the present specification provide a method for detecting the opening force of a car seat belt buckle to solve the problems of consuming a lot of manpower and complicated operation in the prior art.

[0005] To solve the above technical problems, the embodiments of this specification are implemented as follows:

[0006] In a first aspect, an embodiment of this specification provides a method for detecting the opening force of a car seat belt buckle, wherein the seat belt is fixed on an opening force detection device, and the method is applied to the opening force detection device, comprising:

[0007] Acquire detection parameters of the seat belt to be detected, wherein the detection parameters include tension parameters and opening force parameters;

[0008] Adjusting the safety belt to achieve the tension parameter;

[0009] According to the opening force parameter, a buckle of the seat belt is pressed.

[0010] In a second aspect, an embodiment of the present specification provides a vehicle seat belt buckle opening force detection device, the seat belt is fixed on the opening force detection device, the seat belt includes a buckle and a belt rope, and the opening force detection device includes:

[0011] A fixing mechanism is provided with a plurality of holes;

[0012] A buckle clamp, detachably arranged on the first hole of the fixing mechanism, for clamping the buckle;

[0013] A position adjustment mechanism, detachably arranged on the second hole of the fixing mechanism, for fixing the belt rope;

[0014] A buckle opening device comprises a first end, a second end and a bracket for connecting the first end and the second end, wherein the first end and the second end are fixedly connected to the fixing mechanism, and a servo system, a lifting mechanism and a force sensor are sequentially installed on the bracket for pressing the buckle.

[0015] An embodiment of the present specification realizes the following beneficial effects: the seat belt is fixed on the opening force detection device, and the tension of the seat belt is adjusted according to the tension parameters corresponding to the seat belt to be detected. Under this tension, the buckle of the seat belt is pressed with the tension parameters corresponding to the seat belt to be detected, and the opening force detection device automatically adjusts the tension and opening force of the seat belt according to the detection parameters of the seat belt to be detected, thereby improving the degree of automation of the opening force detection of the car seat belt buckle and simplifying the detection operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0017] Figure 1 A schematic flow chart of a method for detecting the opening force of a car seat belt buckle in an embodiment of this specification;

[0018] Figure 2 A structural schematic diagram of a vehicle safety belt buckle opening force detection device provided in an embodiment of this specification;

[0019] Figure 3 Another structural schematic diagram of a vehicle seat belt buckle opening force detection device provided in an embodiment of this specification.

[0020] Description of the drawings: 1- buckle fixture; 2- buckle; 3- fixing mechanism; 4- position adjustment mechanism; 5- force sensor; 6- ejector pin; 7- lifting mechanism; 8- servo system. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of one or more embodiments of this specification clearer, the technical solutions of one or more embodiments of this specification will be clearly and completely described below in combination with the specific embodiments of this specification and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of one or more embodiments of this specification.

[0022] In order to solve the defects in the prior art, the technical solutions provided by the embodiments of this specification are described in detail below with reference to the accompanying drawings.

[0023] A method for detecting the opening force of a car seat belt buckle provided in an embodiment of the specification is specifically described in conjunction with the accompanying drawings.

[0024] Figure 1 A schematic flow chart of a method for detecting the opening force of a car seat belt buckle provided in an embodiment of this specification.

[0025] The safety belt is fixed on the opening force detection device, and the method is applied to the opening force detection device, such as Figure 1 As shown, the process may include the following steps:

[0026] Step 110: Acquire detection parameters of the seat belt to be detected, wherein the detection parameters include a tension parameter and an opening force parameter.

[0027] In the embodiments of this specification, the safety belt is fixed on the opening force detection device according to the detection requirements. The inspector needs to edit the detection data according to the detection standard. The detection parameters may include tension parameters and opening force parameters. The tension parameters may include tension value and tension speed. For example, when the safety belt is a single webbing, the tension value is set to 600N; if it is a double webbing, the tension value is 300N and the tension speed is 120mm / min.

[0028] The opening force parameters can include the opening force speed and the opening force value. For example, the opening force speed is 400mm / min, which means that during the test, the seat belt buckle is moved downward at a speed of 400mm per minute to try to open the seat belt buckle. The opening force value is actually measured during the test and represents the actual opening force required to open the seat belt buckle under the set tension.

[0029] Step 120: Adjust the seat belt to achieve the tension parameter.

[0030] Step 130: Pressing the buckle of the seat belt according to the opening force parameter.

[0031] In the embodiments of the present specification, the opening force detection device stretches the seat belt according to the set tension parameters, and the motion control system on the opening force detection device can control the pressing mechanism to press the buckle according to the set opening force parameters to detect the safety of the seat belt.

[0032] It should be understood that the order of some steps in the methods described in one or more embodiments of this specification can be interchanged according to actual needs, or some steps can be omitted or deleted.

[0033] In the embodiments of the present specification, the seat belt is fixed on the opening force detection device, and the tension of the seat belt is adjusted according to the tension parameters corresponding to the seat belt to be detected. Under this tension, the buckle of the seat belt is pressed with the tension parameters corresponding to the seat belt to be detected. The opening force detection device automatically adjusts the tension and opening force of the seat belt according to the detection parameters of the seat belt to be detected, thereby improving the degree of automation of the opening force detection of the automobile seat belt buckle and simplifying the detection operation.

[0034] based on Figure 1 The method in this specification also provides some specific implementation plans of the method, which are described below.

[0035] Optionally, the adjusting the safety belt to achieve the tension parameter in the embodiments of this specification may specifically include:

[0036] Generating a detection curve according to the pulling force parameter and the opening force parameter;

[0037] Determining whether the detection curve is consistent with a preset standard curve;

[0038] If so, adjust the seat belt to achieve the tension parameter.

[0039] In the embodiments of this specification, corresponding test conditions are set on the opening force detection device according to the tension parameters and the opening force parameters, and a detection curve is generated through program operation, which can reflect the force value changes of the seat belt during the stretching and opening process.

[0040] The preset standard curve is a curve generated in advance according to the specifications, standards or requirements of the seat belt.

[0041] The generated detection curve is compared with the preset standard curve to evaluate the consistency between the two. If they are consistent, the detection is performed and the tension of the seat belt is adjusted; if they are inconsistent, the detection parameters are re-edited to make the generated detection curve consistent with the preset standard curve.

[0042] The consistency between the test curve and the preset standard curve is evaluated by observing the curve shape, calculating the correlation coefficient, etc. For example, the trend of the test curve and the standard curve is observed, including the slope and curvature of the curve. If the slope is obviously different or the curvature is inconsistent, it indicates that the two are inconsistent.

[0043] In practical applications, it is possible to observe whether the detection curve coincides with the preset standard curve. If there is no deviation, it indicates that the two are consistent.

[0044] If there is a deviation, determine whether the rate of change between the value corresponding to the detection curve at the deviation position and the value corresponding to the preset standard curve at the deviation position is greater than 1%. If the rate of change is greater than 1%, it indicates that the two are inconsistent. If the rate of change is less than or equal to 1%, it indicates that the two are consistent.

[0045] Optionally, the method described in the embodiments of this specification further includes:

[0046] Determining whether the buckle is open;

[0047] If yes, stop testing;

[0048] If not, generate a warning message.

[0049] In the embodiments of this specification, the sensor provided on the opening force detection device detects whether the seat belt is opened successfully. When it is detected that the buckle is opened successfully, the detection process can be stopped immediately. If the seat belt is not opened, the detection will continue. When the detection reaches a preset limit protection value, such as a set force value or displacement limit, the detection is stopped and an early warning message is automatically generated. The early warning message may include the reason for the detection failure (such as the buckle is not opened successfully), the current detection parameters (such as the tension value, the opening force speed, etc.), and possible follow-up operation suggestions.

[0050] There are various types of seat belt buckles, which can be divided into right-angle type and straight type based on shape, and long type and short type based on length. Moreover, the opening force test can only be performed on a single type of seat belt buckle, which cannot take into account every type of seat belt buckle.

[0051] In order to solve the defects in the prior art, the automotive seat belt buckle opening force detection device described in the embodiment of this specification, the seat belt is fixed on the opening force detection device, the seat belt includes a buckle and a belt rope, and the opening force detection device may include:

[0052] The fixing mechanism 3 is provided with a plurality of holes;

[0053] A buckle clamp 1, detachably arranged on the first hole of the fixing mechanism 3, for clamping the buckle 2;

[0054] The position adjustment mechanism 4 is detachably arranged on the second hole position of the fixing mechanism 3, and is used to fix the belt rope; the safety belt has a certain pre-tightening force through the first hole position and the second hole position, and the buckle clamp 1 and the position adjustment mechanism 4 meet the detection position requirements.

[0055] The buckle 2 opening device comprises a first end, a second end and a bracket for connecting the first end and the second end, wherein the first end and the second end are fixedly connected to the fixing mechanism 3, and a servo system 8, a lifting mechanism 7 and a force sensor 5 are sequentially installed on the bracket for pressing the buckle 2.

[0056] Figure 2 A structural schematic diagram of a vehicle seat belt buckle opening force detection device provided in an embodiment of this specification.

[0057] like Figure 2 As shown, the fixing mechanism 3 provides a stable platform, which can be a rectangular multi-hole fixing plate for installing and fixing other components. The fixing mechanism 3 is provided with a plurality of holes, which are used to install and position the buckle clamp 1 and the position adjustment mechanism 4.

[0058] The buckle clamp 1 firmly fixes the buckle 2 by mechanical clamping, and is detachably arranged on the first hole position of the fixing mechanism 3, so as to facilitate replacement or adjustment.

[0059] The position adjustment mechanism 4 may include a clamping device to fix the safety belt rope, which is detachably arranged on the second hole position of the fixing mechanism 3 to facilitate replacement or adjustment.

[0060] Buckle 2 opening device, press the seat belt buckle 2 to test its opening performance.

[0061] The first end and the second end are fixedly connected to the fixing mechanism 3 to ensure the stability of the whole device. The bracket connects the first end and the second end to provide a platform for supporting and installing the servo system 8, the lifting mechanism 7, and the force sensor 5. The servo system 8 includes a servo motor and a servo drive, which can provide precisely controlled movement, such as speed and position control. Under the control of the servo system 8, the lifting mechanism 7 realizes vertical movement to press the buckle 2. The force sensor 5 measures the force required to press the buckle 2 to evaluate the opening performance of the buckle 2.

[0062] In practical applications, the servo system 8 controls the lifting mechanism 7 to move the ejector pin 6 on the force sensor 5 to open and reset the buckle 2. The buckle fixture 1 and the position adjustment mechanism 4 can be moved at any hole position on the fixing mechanism 3, so that different types of safety belts can be tested.

[0063] Optionally, the opening force detection device in the embodiment of this specification further includes: a motion control system and a lower computer connected to the motion control system;

[0064] The lower computer is used to obtain the detection parameters of the safety belt to be detected, wherein the detection parameters include tension parameters and opening force parameters;

[0065] The motion control system is used to adjust the safety belt to reach the tension parameter and press the buckle 2 according to the opening force parameter. The lower computer and the motion control system can be connected by wire or wirelessly.

[0066] In the embodiments of this specification, the lower computer can obtain and process the detection parameters of the seat belt to be detected. Through sensors or other input devices, the lower computer can read the tension parameters of the seat belt, such as the maximum tension, tension change curve, etc. and the opening force parameters, such as the expected opening force, the opening force change range, etc. The acquired detection parameters are transmitted to the motion control system so that the latter can perform precise operations according to these parameters.

[0067] In practical applications, the lower computer can generate a detection curve based on the tension parameters and opening force parameters, and compare the detection curve with a preset standard curve. When the detection curve is inconsistent with the standard curve, the user can re-edit the detection parameters to ensure the accuracy of the obtained tension parameters and opening force parameters.

[0068] The motion control system may include a servo system 8, which may control the motion part of the entire detection device, including the stretching and pressing actions. According to the tension parameter provided by the lower computer, the motion control system controls the servo system 8 to stretch the seat belt to adjust the tension of the seat belt to reach a predetermined test value. After the seat belt tension reaches the requirement, the motion control system controls the servo system 8 to adjust the ejector pin 6 on the force sensor to press the buckle 2 according to the opening force parameter provided by the lower computer, simulating the opening action in actual use.

[0069] The motion control system controls the servo system 8 through a motion control card, a connecting line, and an axis card, wherein the motion control card is a high-performance servo motor motion control card that can realize multi-axis coordinated control of multiple servo motors, emit a continuous, high-frequency pulse train, and control the speed of the motor by changing the frequency of the emitted pulses, and control the position of the motor by changing the number of emitted pulses. The connecting line is the line connecting the motion control card and the axis card. The axis card, commonly known as the terminal board, is connected to the driver of the servo motor and is a bridge between the motion control card and the driver, thereby ensuring that the tension of the seat belt and the opening force of the buckle 2 are kept within a predetermined range during the test.

[0070] Optionally, the opening force detection device in the embodiment of this specification further includes: a data acquisition system and a host computer connected to the lower computer;

[0071] The data acquisition system is used to collect the pulling force and the opening force, and send them to the lower computer;

[0072] The host computer is used to receive the data transmitted by the lower computer and display the data on the display of the host computer. The lower computer, the host computer and the data acquisition system can be connected by wires or wirelessly.

[0073] In the embodiments of this specification, the data acquisition system can collect key data during the test, including tension, opening force, opening force speed, opening displacement, etc. The data acquisition system may include a sensor and a signal conditioning circuit. The sensor is responsible for converting the tension and opening force into electrical signals, and the signal conditioning circuit amplifies, filters and converts these electrical signals so that the lower computer can read them accurately. The collected data is sent to the lower computer via a data line or wirelessly for further processing and analysis.

[0074] The upper computer can receive the data transmitted by the lower computer, and display and store it. The received data is intuitively displayed in the form of charts, curves or numbers on the display for operators to monitor and analyze. The test data is saved in a hard disk, flash memory or other storage device for subsequent query and comparison.

[0075] In actual applications, the user can input the detection parameters of the seat belt to be tested through the display of the host computer, and the host computer can display the detection curve and the standard curve so that the user can intuitively feel the consistency between the detection curve and the standard curve.

[0076] Optionally, in the embodiment of the present specification, proximity switches are provided at both ends of the running track of the lifting mechanism 7. When the proximity switches detect that the lifting mechanism 7 moves to a preset limit position, the servo system 8 controls the lifting mechanism 7 to stop running.

[0077] In the embodiment of the present specification, the lifting mechanism 7 can move up and down in the vertical direction along a fixed track to press the seat belt buckle 2 to perform an opening force test.

[0078] The proximity switch is used to detect whether the lifting mechanism 7 has reached the preset limit position. The proximity switch is installed at both ends of the running track of the lifting mechanism 7, namely the rising limit position and the falling limit position of the lifting mechanism 7. When the lifting mechanism 7 moves into the sensing range of the proximity switch, the proximity switch will send a signal to the data acquisition system. In order to ensure safety, the motion control system controls the servo system 8 to stop providing power to the lifting mechanism 7, so that it stops running, which can prevent the lifting mechanism 7 from continuing to run after reaching the limit position, thereby avoiding damage to the equipment itself or the surrounding environment.

[0079] Figure 3 Another structural schematic diagram of a vehicle seat belt buckle opening force detection device provided in an embodiment of this specification.

[0080] like Figure 3 As shown, the upper computer is connected to the lower computer, and the lower computer is respectively connected to the data acquisition system and the motion control system. The data acquisition system can collect information from sensors and proximity switches, and the motion control system can control the servo system 8.

[0081] In actual application, the seat belt to be inspected is selected, the buckle clamp 1 clamps the buckle 2 of the seat belt, and the position adjustment mechanism 4 fixes the belt rope of the seat belt. Adjust the position of the buckle clamp 1 and the position adjustment mechanism 4 on the fixing mechanism 3 according to the type of the seat belt to be inspected. Enter the main detection interface through the display of the upper computer, and edit the detection parameters of the seat belt to be inspected in the main interface according to the type of the seat belt to be inspected, such as editing the detection name, detection number, tension speed, tension value, opening force speed, etc., and store the edited information. The lower computer obtains the detection parameters of the seat belt to be inspected, generates a detection curve, and determines whether the detection curve is consistent with the standard curve. If not, re-edit the detection parameters in the display. If consistent, the motion control system controls the servo system 8 to adjust the seat belt to the tension parameter, and presses the buckle 2 of the seat belt according to the opening force parameter. The detection is completed and the detection results are checked.

[0082] The above describes specific embodiments of this specification, and other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily have to be performed in the specific order or continuous order shown to achieve the desired results. The various embodiments in this specification are described in a progressive manner, and the same and similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0083] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0084] The above is only an embodiment of this specification and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.

Claims

1. A method for detecting the opening force of a car seat belt buckle, characterized in that: The safety belt is fixed on an opening force detection device, and the method is applied to the opening force detection device, and the method comprises: Acquire detection parameters of the seat belt to be detected, wherein the detection parameters include tension parameters and opening force parameters; Adjusting the safety belt to achieve the tension parameter; According to the opening force parameter, a buckle of the seat belt is pressed.

2. The method according to claim 1, characterized in that The step of adjusting the safety belt to achieve the tension parameter specifically includes: Generating a detection curve according to the pulling force parameter and the opening force parameter; Determining whether the detection curve is consistent with a preset standard curve; If so, adjust the seat belt to achieve the tension parameter.

3. The method according to claim 1, characterized in that The method comprises: Determining whether the buckle is open; If yes, stop testing; If not, generate a warning message.

4. A vehicle seat belt buckle opening force detection device, characterized in that: The safety belt is fixed on the opening force detection device, the safety belt includes a buckle and a belt rope, and the opening force detection device includes: A fixing mechanism is provided with a plurality of holes; A buckle clamp, detachably arranged on the first hole of the fixing mechanism, for clamping the buckle; A position adjustment mechanism, detachably arranged on the second hole of the fixing mechanism, for fixing the belt rope; A buckle opening device comprises a first end, a second end and a bracket for connecting the first end and the second end, wherein the first end and the second end are fixedly connected to the fixing mechanism, and a servo system, a lifting mechanism and a force sensor are sequentially installed on the bracket for pressing the buckle.

5. The opening force detection device according to claim 4, characterized in that: The opening force detection device further includes: a motion control system and a lower computer connected to the motion control system; The lower computer is used to obtain the detection parameters of the safety belt to be detected, wherein the detection parameters include tension parameters and opening force parameters; The motion control system is used to adjust the safety belt to reach the tension parameter; and press the buckle according to the opening force parameter.

6. The opening force detection device according to claim 5, characterized in that: The opening force detection device further comprises: a data acquisition system and a host computer connected to the lower computer; The data acquisition system is used to collect the pulling force and the opening force, and send them to the lower computer; The host computer is used to receive the data transmitted by the slave computer and display the data through the display of the host computer.

7. The opening force detection device according to claim 4, characterized in that: Proximity switches are provided at both ends of the running track of the lifting mechanism. When the proximity switches detect that the lifting mechanism moves to a preset limit position, the servo system controls the lifting mechanism to stop running.

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