Automobile door lock sound detection circuit, detection device, pipeline and detection method
By designing a car door lock sound detection circuit, the locking action is triggered by the door open signal and the door slightly open signal, which realizes the accurate capture of door lock sound in the background noise environment. This solves the problems of false alarm and timing asynchrony in the existing technology and reduces the equipment modification cost.
Patent Information
- Application Number
- CN202611422423.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-09-14
- Publication Date
- 2026-11-06
AI Technical Summary
In existing technologies, car door locks cannot accurately capture the sound of locking action during production line testing. Background noise interference is severe, and the timing is not synchronized with the control module, leading to false alarms and lack of safety redundancy.
A car door lock sound detection circuit was designed. Through the coordinated work of the control module and the sound detection module, the locking action is triggered by the door open signal and the door slightly open signal. Combined with the latch unit and the power supply module, the sound of the action is accurately captured and synchronized in time. An alarm voltage threshold is set for judgment.
It achieves accurate capture of door lock operation sounds in noisy environments, reduces false alarms, ensures timing synchronization with the control module, provides safety redundancy, and has low equipment modification costs.
Smart Images
Figure CN123045749A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the automotive field, specifically to a car door lock sound detection circuit, detection device, production line, and detection method. Background Technology
[0002] In production line testing of automotive self-closing door locks, a control module (such as a programmable logic controller, PLC) typically executes four consecutive door opening and closing actions: "self-closing," "self-closing reset," "electric unlocking," and "electric reset." The instantaneous sound produced by the door lock under test (approximately tens to hundreds of milliseconds) is a core indicator for determining its assembly quality. Existing technology has the following drawbacks: 1. Inaccurate capture of the locking action sound: Background noise from equipment start-up and shutdown, fixture movements, etc., on the production line is much greater than the sound pressure level of the door lock action. Continuous acquisition mode cannot accurately capture the locking action sound of the door lock under test, leading to frequent false alarms. 2. Insynchronous timing with the control module: Sound detection operates independently and cannot be accurately synchronized with the door lock action timing of the control module, resulting in a large amount of invalid noise mixed in the collected data. 3. Lack of safety redundancy: The judgment boundary is directly set as the pass value (e.g., 60dB), without an early warning mechanism, and products with edge values cannot be reliably intercepted. Summary of the Invention
[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a car door lock sound detection circuit, detection device, production line and detection method.
[0004] To achieve the above objectives, the present invention provides a car door lock sound detection circuit, detection device, production line, and detection method as follows: A car door lock sound detection circuit, used in the field of car door lock performance testing, includes: The door lock to be tested has its output terminal connected to the input terminal of the control module. The door lock to be tested is configured to issue a door open signal when it is unlocked, and to issue a door slightly open signal when it is unlocked and half-locked. A control module, the output of which is connected to the input of a sound detection module, and the input of which is connected to the output of the sound detection module, is configured to, in response to the disappearance of the door open signal but the continued existence of the door slightly open signal, energize the motor inside the door lock through the first output of the control module, causing the door lock under test to perform a locking action. During the full locking process, the test fixture applies resistance to the bolt of the door lock under test to simulate the compression of the sealing strip, and outputs a door lock judgment result signal in response to the locking action and the sound signal of the action. A sound detection module is configured to enter a working state in response to the working activation signal and output the corresponding action sound signal based on the locking action of the door lock to be detected.
[0005] Preferably, the signal output from the output terminal of the door lock to be tested includes a first door lock signal and a second door lock signal; The first door lock signal includes the door open signal, and the second door lock signal includes the door slightly open signal.
[0006] Preferably, the input terminal of the control module includes a first control input terminal and a second control input terminal, and the output terminal of the control module includes a first control output terminal; The first control input terminal is used to receive the door open signal and the door slightly open signal, and the second control input terminal is used to receive the action sound signal; The first control output terminal is used to output the working activation signal.
[0007] Preferably, the input terminal of the sound detection module includes a first detection input terminal and a second detection input terminal, and the output terminal of the sound detection module includes a first detection output terminal; The first detection input terminal is used to receive the working activation signal, the second detection input terminal is used to receive the action sound signal of the door lock to be tested performing the locking action, and the first detection output terminal is used to output the action sound signal.
[0008] Preferably, the control module includes a latch unit, which is used to generate the working activation signal when the door open signal disappears but the door slightly open signal still exists; The latch unit is also used to send a stop signal to the sound detection module after the activation signal is sent, in response to the disappearance of both the door open signal and the door slightly open signal. The stop signal is used to cause the sound detection module to exit the working state.
[0009] Preferably, the car door lock sound detection circuit further includes: A power supply module is provided, wherein the power supply terminal of the power supply module is connected to the power receiving terminal of the control module and the power receiving terminal of the sound detection module, and the power supply module is used to supply power to the control module and the sound detection module.
[0010] Preferably, the car door lock sound detection circuit further includes: An alarm module is provided, the input of which is connected to the output of the control unit. The alarm module is configured to issue an alarm in response to an alarm action signal issued by the control unit.
[0011] The present invention also provides a car door lock sound detection device, which includes the car door lock sound detection circuit as described above.
[0012] The present invention also provides an assembly line, which includes the above-mentioned car door lock sound detection device.
[0013] The present invention also provides a method for detecting the sound of a car door lock, the method utilizing the aforementioned car door lock sound detection circuit, the method comprising: (1) In response to the disappearance of the door open signal but the door slightly open signal still being present, the operating mode is entered; (2) In the working mode, the loudness of the locking action sound signal of the door lock to be tested is detected, and a corresponding action sound voltage is generated based on the loudness of the action sound signal; The voltage of the action sound is positively correlated with the loudness of the action sound signal; (3) Determine whether the door lock to be tested is qualified based on the voltage of the action sound.
[0014] Preferably, step (2) specifically includes: Step (2) specifically includes: (2.1) Generate an action sound voltage of 0.3V based on an action sound signal loudness of 30dB, 0.4V based on an action sound signal loudness of 40dB, 0.505V based on an action sound signal loudness of 50dB, 0.61V based on an action sound signal loudness of 60dB, 0.715V based on an action sound signal loudness of 70dB, 0.82V based on an action sound signal loudness of 80dB, 0.911V based on an action sound signal loudness of 90dB, 1.02V based on an action sound signal loudness of 100dB, 1.087V based on an action sound signal loudness of 110dB, and 1.02V based on an action sound signal loudness of 120dB. At least one of the following: a 192V operating sound voltage and a 1.3V operating sound voltage generated based on a 130dB operating sound signal loudness.
[0015] Preferably, step (3) specifically includes: The suitability of the door lock to be tested is determined based on the action sound voltage and the alarm voltage threshold. The alarm loudness corresponding to the alarm voltage threshold is less than the qualified loudness of the door lock to be tested by 5 dB.
[0016] The car door lock sound detection circuit of this invention accurately captures the sound of the door lock locking action by triggering the acquisition of signals (door opening signal and door slightly opening signal) only during the door lock action period. In addition, the control module and the door lock action timing are completely synchronized, which is compatible with the production rhythm of relevant car door lock production lines. The entire circuit can reuse production line hardware, has a simple overall structure, and low equipment modification investment cost. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the automotive door lock sound detection circuit of the present invention. Detailed Implementation
[0018] To more clearly describe the technical content of the present invention, the following description is provided in conjunction with specific embodiments.
[0019] Please see Figure 1 A car door lock sound detection circuit, used in the field of car door lock performance testing, comprising: The door lock to be tested 1 has its output terminal connected to the input terminal of the control module 2. The door lock to be tested 1 is configured to issue a door open signal when it is unlocked, and to issue a door slightly open signal when it is unlocked and half-locked. Control module 2, the output of which is connected to the input of sound detection module 3, and the input of which is connected to the output of sound detection module 3, is configured to, in response to the disappearance of the door open signal but the still existence of the door slightly open signal, energize the motor inside the door lock through the first output of control module 2, so that the door lock under test performs a locking action. During the process of fully locking, the test fixture applies resistance to the bolt of the door lock under test to simulate the compression of the sealing strip, and outputs a door lock judgment result signal in response to the locking action. The sound detection module 3 is configured to enter a working state in response to the working activation signal and output the corresponding action sound signal based on the locking action of the door lock 1 to be detected.
[0020] In some embodiments, the action sound signal output by the sound detection module 3 is a voltage, and the higher the voltage, the louder the sound.
[0021] For the door lock 1 to be tested, the acceptable loudness should be less than or equal to 60 dB. The control module 2 can then set an alarm voltage threshold corresponding to 60 dB. When the sound signal exceeds this alarm voltage threshold, the door lock's determination result signal is considered unacceptable, and vice versa. In some embodiments, whether the door lock's determination result signal is acceptable can be represented by high or low levels.
[0022] In some embodiments, when the acceptable loudness should be less than or equal to 60 dB, the alarm voltage threshold can also be set to 55 dB to reserve a certain safety redundancy range.
[0023] In some embodiments, the voltage range is 0.3V to 1.3V, and the loudness of the action sound signal corresponding to the voltage signal is 30dB (corresponding to 0.3V) to 130dB (corresponding to 1.3V).
[0024] In some implementations, control module 2 can be a PLC with a scanning cycle of ≤10ms. It continuously reads two digital signals: door open and door slightly open. When both signals are read, an activation signal is generated. At this point, the PLC executes the door lock action. The door lock action sequence is: self-priming (1200ms) → delay 50ms → self-priming reset (1000ms) → power-on (300ms) → delay 50ms → power-on reset (300ms). The PLC continuously acquires analog voltage signals during the execution of the above door lock action.
[0025] In some embodiments, after outputting the activation signal, the PLC samples at a frequency ≥500Hz and continuously reads the action sound signal. Once the action sound signal is read, it is compared to the input signal to output the door lock determination result signal. Afterwards, the PLC clears all status registers and waits for the next door open signal and the door slightly open signal.
[0026] In some embodiments, the signals output from the output terminal of the door lock 1 to be detected include a first door lock signal and a second door lock signal; The first door lock signal includes the door open signal, and the second door lock signal includes the door slightly open signal.
[0027] In some embodiments, the input terminal of the control module 2 includes a first control input terminal and a second control input terminal, and the output terminal of the control module 2 includes a first control output terminal; The first control input terminal is used to receive the door open signal and the door slightly open signal, and the second control input terminal is used to receive the action sound signal; The first control output terminal is used to output the working activation signal.
[0028] In some embodiments, the input terminal of the sound detection module 3 includes a first detection input terminal and a second detection input terminal, and the output terminal of the sound detection module 3 includes a first detection output terminal; The first detection input terminal is used to receive the working activation signal, the second detection input terminal is used to receive the action sound signal of the door lock 1 under test performing the locking action, and the first detection output terminal is used to output the action sound signal.
[0029] In some embodiments, the control module 2 includes a latch unit, which is used to generate the working activation signal when the door open signal disappears but the door slightly open signal still exists; The latch unit is also used to send a stop signal to the sound detection module 3 after the activation signal is sent, in response to the disappearance of both the door open signal and the door slightly open signal. The work stop signal is used to cause the sound detection module 3 to exit the working state.
[0030] In some embodiments, the car door lock sound detection circuit further includes: The power supply module 4 has its power supply terminal connected to the power receiving terminal of the control module 2 and the power receiving terminal of the sound detection module 3, respectively. The power supply module 4 is used to supply power to the control module 2 and the sound detection module 3.
[0031] In some embodiments, the car door lock sound detection circuit further includes: Alarm module 5, the input terminal of which is connected to the output terminal of the control unit, is configured to issue an alarm in response to an alarm action signal issued by the control unit.
[0032] The present invention also provides a car door lock sound detection device, which includes the car door lock sound detection circuit as described above.
[0033] The present invention also provides an assembly line, which includes the above-mentioned car door lock sound detection device.
[0034] The present invention also provides a method for detecting the sound of a car door lock, the method utilizing the aforementioned car door lock sound detection circuit, the method comprising: (1) In response to the disappearance of the door open signal but the door slightly open signal still being present, the operating mode is entered; (2) In the working mode, the loudness of the locking action sound signal of the door lock 1 to be tested is detected, and a corresponding action sound voltage is generated based on the loudness of the action sound signal; The voltage of the action sound is positively correlated with the loudness of the action sound signal; (3) Determine whether the door lock 1 to be tested is qualified based on the voltage of the action sound.
[0035] Preferably, step (2) specifically includes: (2.1) Generate an action sound voltage of 0.3V based on an action sound signal loudness of 30dB, 0.4V based on an action sound signal loudness of 40dB, 0.505V based on an action sound signal loudness of 50dB, 0.61V based on an action sound signal loudness of 60dB, 0.715V based on an action sound signal loudness of 70dB, 0.82V based on an action sound signal loudness of 80dB, 0.911V based on an action sound signal loudness of 90dB, 1.02V based on an action sound signal loudness of 100dB, 1.087V based on an action sound signal loudness of 110dB, and 1.02V based on an action sound signal loudness of 120dB. At least one of the following: a 192V action sound voltage and a 1.3V action sound voltage generated based on a 130dB action sound signal loudness. In the above embodiment, the action sound signal loudness and action sound voltage in step (2) are tested in a semi-anechoic chamber using standard sound sources of 30dB, 60dB, 90dB, and 130dB respectively. The analog voltages corresponding to each decibel value (approximately 0.3V, 0.8V, 1.0V, and 1.3V) are recorded, a linear correlation curve between voltage and decibel is fitted, and the data is stored in the PLC.
[0036] Preferably, step (3) specifically includes: determining whether the door lock 1 to be tested is qualified based on the action sound voltage and the alarm voltage threshold; The alarm loudness corresponding to the alarm voltage threshold is less than the qualified loudness of the door lock 1 to be tested by 5 dB.
[0037] The car door lock sound detection circuit of this invention accurately captures the sound of the door lock locking action by triggering the collected signals (door opening signal and door slightly opening signal) only during the door lock action period. In addition, the control module 2 and the door lock action timing are completely synchronized, which is compatible with the production rhythm of relevant car door lock production lines. The entire circuit can reuse production line hardware, has a simple overall structure, and low equipment modification investment cost.
[0038] For the specific implementation scheme of this embodiment, please refer to the relevant descriptions in the above embodiments, which will not be repeated here.
[0039] It is understood that the same or similar parts in the above embodiments can be referred to each other, and the contents not described in detail in some embodiments can be referred to the same or similar contents in other embodiments.
[0040] It should be noted that in the description of this invention, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means at least two.
[0041] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process, and the scope of the preferred embodiments of the invention includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as will be understood by those skilled in the art to which embodiments of the invention pertain.
[0042] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution device. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.
[0043] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The corresponding program can be stored in a computer-readable storage medium. When the program is executed, it includes one or a combination of the steps of the method embodiments.
[0044] Furthermore, the functional units in the various embodiments of the present invention can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium.
[0045] The storage media mentioned above can be read-only memory, disk, or optical disk, etc.
[0046] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0047] The car door lock sound detection circuit of this invention accurately captures the sound of the door lock locking action by triggering the acquisition of signals (door opening signal and door slightly opening signal) only during the door lock action period. In addition, the control module and the door lock action timing are completely synchronized, which is compatible with the production rhythm of relevant car door lock production lines. The entire circuit can reuse production line hardware, has a simple overall structure, and low equipment modification investment cost.
[0048] In this specification, the invention has been described with reference to specific embodiments thereof. However, it will be apparent that various modifications and variations can be made without departing from the spirit and scope of the invention. Therefore, the specification and drawings should be considered illustrative rather than restrictive.
Claims
1. A car door lock sound detection circuit, characterized in that, The car door lock sound detection circuit is used in the field of car door lock performance testing, including: The door lock to be tested has its output terminal connected to the input terminal of the control module. The door lock to be tested is configured to issue a door open signal when it is unlocked, and to issue a door slightly open signal when it is unlocked and half-locked. A control module, the output of which is connected to the input of a sound detection module, and the input of which is connected to the output of the sound detection module, is configured to, in response to the disappearance of the door open signal but the continued existence of the door slightly open signal, energize the motor inside the door lock through the first output of the control module, causing the door lock under test to perform a locking action. During the full locking process, the test fixture applies resistance to the bolt of the door lock under test to simulate the compression of the sealing strip, and the action sound signal in response to the locking action is output as a door lock judgment result signal. A sound detection module is configured to enter a working state in response to the working activation signal and output the corresponding action sound signal based on the locking action of the door lock to be detected.
2. The car door lock sound detection circuit according to claim 1, characterized in that, The signals output from the output terminal of the door lock to be tested include a first door lock signal and a second door lock signal; The first door lock signal includes the door open signal, and the second door lock signal includes the door slightly open signal.
3. The car door lock sound detection circuit according to claim 1, characterized in that, The input terminals of the control module include a first control input terminal and a second control input terminal, and the output terminals of the control module include a first control output terminal; The first control input terminal is used to receive the door open signal and the door slightly open signal, and the second control input terminal is used to receive the action sound signal; The first control output terminal is used to output the working activation signal.
4. The car door lock sound detection circuit according to claim 1, characterized in that, The sound detection module has a first detection input terminal and a second detection input terminal as its input terminals, and a first detection output terminal as its output terminal. The first detection input terminal is used to receive the working activation signal, the second detection input terminal is used to receive the action sound signal of the door lock to be tested performing the locking action, and the first detection output terminal is used to output the action sound signal.
5. The car door lock sound detection circuit according to claim 1, characterized in that, The control module includes a latch unit, which is used to generate the working activation signal when the door open signal disappears but the door slightly open signal still exists. The latch unit is also used to send a stop signal to the sound detection module after the activation signal is sent, in response to the disappearance of both the door open signal and the door slightly open signal. The stop signal is used to cause the sound detection module to exit the working state.
6. The car door lock sound detection circuit according to claim 1, characterized in that, The car door lock sound detection circuit also includes: A power supply module is provided, wherein the power supply terminal of the power supply module is connected to the power receiving terminal of the control module and the power receiving terminal of the sound detection module, and the power supply module is used to supply power to the control module and the sound detection module.
7. The car door lock sound detection circuit according to claim 6, characterized in that, The car door lock sound detection circuit also includes: An alarm module is provided, the input of which is connected to the output of the control unit. The alarm module is configured to issue an alarm in response to an alarm action signal issued by the control unit.
8. A car door lock sound detection device, characterized in that, The car door lock sound detection device includes the car door lock sound detection circuit as described in any one of claims 1 to 7.
9. An assembly line, characterized in that, The production line includes the car door lock sound detection device as described in claim 8.
10. A method for detecting the sound of a car door lock, characterized in that, The car door lock sound detection method utilizes the car door lock sound detection circuit as described in any one of claims 1 to 7, and the car door lock sound detection method includes: (1) In response to the disappearance of the door open signal but the door slightly open signal still being present, the operating mode is entered; (2) In the working mode, the loudness of the locking action sound signal of the door lock to be tested is detected, and a corresponding action sound voltage is generated based on the loudness of the action sound signal; The voltage of the action sound is positively correlated with the loudness of the action sound signal; (3) Determine whether the door lock to be tested is qualified based on the voltage of the action sound.
11. The method for detecting the sound of a car door lock according to claim 10, characterized in that, Step (2) specifically includes: (2.1) Generate an action sound voltage of 0.3V based on an action sound signal loudness of 30dB, 0.4V based on an action sound signal loudness of 40dB, 0.505V based on an action sound signal loudness of 50dB, 0.61V based on an action sound signal loudness of 60dB, 0.715V based on an action sound signal loudness of 70dB, 0.82V based on an action sound signal loudness of 80dB, 0.911V based on an action sound signal loudness of 90dB, 1.02V based on an action sound signal loudness of 100dB, 1.087V based on an action sound signal loudness of 110dB, and 1.02V based on an action sound signal loudness of 120dB. At least one of the following: a 192V operating sound voltage and a 1.3V operating sound voltage generated based on a 130dB operating sound signal loudness.
12. The method for detecting the sound of a car door lock according to claim 10, characterized in that, Step (3) specifically includes: The suitability of the door lock to be tested is determined based on the action sound voltage and the alarm voltage threshold. The alarm loudness corresponding to the alarm voltage threshold is less than the qualified loudness of the door lock to be tested by 5 dB.