Rivet detection device with fingerprint authentication function
The rivet detection device, which combines a fingerprint authentication module with a photoelectric/pressure dual-mode detector, solves the problems of low efficiency and insufficient authorization verification in existing equipment, and achieves high-precision and reliable rivet detection and production safety management.
Patent Information
- Application Number
- CN202520626781.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-05
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-04-05
AI Technical Summary
Existing rivet inspection equipment suffers from low efficiency, poor consistency, and a tendency to miss rivets. Furthermore, it lacks an operation authorization verification mechanism, allowing unauthorized personnel to start and stop the equipment at will, resulting in abnormal inspection data and difficulty in tracing responsibility.
The system combines a fingerprint authentication module with a photoelectric/pressure dual-mode detector to achieve hierarchical control of operation permissions. It ensures detection accuracy through a contour positioning groove and a lifting drive mechanism, integrates indicator lights and safety relays to prevent misoperation, and improves detection accuracy through dual-sensor logic judgment.
It achieves high-precision and reliable rivet detection, prevents misoperation, ensures the accuracy of detection data and production safety, and improves the convenience and adaptability of equipment management.
Smart Images
Figure CN223955826U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the industrial quality detection technical field, concretely relates to rivet detection device with fingerprint authentication. BACKGROUND
[0002] In the precision manufacturing field such as automobile, aviation, rivet as key connecting piece, its assembly integrity directly influences product structure safety. Traditional rivet detection depends on artificial visual inspection or simple contact type probe detection, and there are problems such as low efficiency, poor consistency and easy to miss detection.
[0003] In recent years, although automatic detection equipment gradually popularizes, but still there are some technical pain points. Detection sensor is easily interfered by workpiece surface reflection, oil stain or rivet slight deformation, leading to misjudgment. The existing equipment generally lacks operation permission verification mechanism, and non-authorized personnel can start and stop the equipment at will, and there is the risk of abnormal detection data caused by parameter tampering and misoperation, especially in multi-shift production scene, it is difficult to trace the responsibility subject. UTILITY MODEL CONTENT
[0004] In view of the deficiencies existing in the prior art, the utility model provides a rivet detection device with fingerprint authentication, aiming to provide a rivet detection device integrating high-precision detection, operation permission grading control and real-time state feedback, to meet the dual needs of quality control and production safety in modern intelligent manufacturing.
[0005] The rivet detection device with fingerprint authentication provided by the utility model comprises a test bin, a workpiece positioning table located in the test bin, a lifting driving element installed in the test bin, a lifting block driven by the lifting driving element, an opening on the operation side of the test bin for putting and taking the workpiece to be detected, a positioning groove on the surface of the workpiece positioning table for embedding and positioning the workpiece to be detected, a detector installed on the lifting block and downwardly facing the positioning groove to detect the existence of the rivet, a fingerprint authentication element on the operation side of the test bin to collect the fingerprint information of the operator and compare it with the pre-stored authorized information, and a lifting driving element based on the comparison result to control the start and stop permission.
[0006] As a further optimization scheme of the rivet detection device, the detector is an optical distance sensor, the detection end of which is vertically downwardly directed to the rivet mounting position in the positioning groove, the detector measures the distance value between the detection end and the obstacle below, the trigger threshold is set between the standard distance value from the top surface of the rivet to the detection end and the distance value from the bottom of the rivet hole to the detection end, the rivet is determined to exist when the detection distance value is less than the preset trigger threshold, and vice versa.
[0007] As a further optimization scheme of the rivet detection device, the detector is a pressure sensor, and the detection end of the pressure sensor is vertically downwardly directed to the rivet mounting position in the positioning groove; the detection end of the pressure sensor is provided with a hemispherical elastic contact head; the trigger threshold is set to be between the rated pressure value in the standard mounting state of the rivet and the pressure value in the non-riveting state; when the detected pressure value is greater than the preset trigger threshold, it is determined that the rivet exists, and otherwise, it is determined that the rivet is missing.
[0008] As a further optimization scheme of the rivet detection device, two independent detectors are arranged on the lifting block and are respectively opposite to the two rivet positions to be detected of the workpiece to be detected; only when the two photoelectric sensors simultaneously detect the existence of the rivets, the control element connected with the detectors generates a qualified signal, and otherwise, an unqualified signal is generated.
[0009] As a further optimization scheme of the rivet detection device, a detection indicating lamp is further arranged in the test bin, and the detection indicating lamp is electrically connected with the control element; when the control element receives the qualified signal, the detection indicating lamp is switched to a green constant-on state.
[0010] As a further optimization scheme of the rivet detection device, when the control element receives the unqualified signal, the control element controls the locking of the lifting driving element.
[0011] As a further optimization scheme of the rivet detection device, the fingerprint authentication element stores the hierarchical permission data corresponding to each input fingerprint, including the ordinary operator permission and the administrator permission; the ordinary operator permission only allows the device reset and detection operation, and the administrator permission additionally allows the adjustment of the trigger threshold parameter and the query of the historical operation record.
[0012] As a further optimization scheme of the rivet detection device, the bottom of the lifting block is provided with an adjustable height adjusting column, and each adjusting column is provided with a buffer pad at the bottom.
[0013] As a further optimization scheme of the rivet detection device, the lifting driving element is a gas cylinder, the cylinder body of the gas cylinder is mounted to the inner wall of the test bin, and the piston rod of the gas cylinder is rigidly connected with the lifting block; the test bin is further provided with a vertical guide rod in sliding fit with the lifting block.
[0014] Advantageous effects
[0015] The rivet detection device with the fingerprint authentication provided by the utility model realizes the double safety management and control of the operation permission and the detection process through the integrated fingerprint authentication module and the automatic detection mechanism. The profiling positioning groove in the test bin cooperates with the lifting driving mechanism to ensure the accurate positioning of the workpiece to be detected and the vertical alignment of the detector, effectively improving the detection repeatability; the fingerprint authentication element verifies the identity of the operator before starting and matches with the pre-stored permission, preventing unauthorized personnel from misoperating the device, which not only guarantees the reliability of the detection data, but also strengthens the safety management of the production site.
[0016] By employing dual-mode photoelectric / pressure detection, dual-sensor logic judgment, and hierarchical access control, the detection accuracy and system functionality have been further optimized. The photoelectric sensor provides non-contact measurement, avoiding mechanical damage, while the pressure sensor offers high sensitivity for identifying riveting status, allowing for rational selection based on actual needs. The fingerprint access control system enhances the operational traceability system, comprehensively improving the adaptability, reliability, automation level, and management convenience of the detection device, meeting the stringent quality control requirements of industries such as automotive and aerospace. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the detection device.
[0018] Figure 2 This is a schematic diagram of the internal structure of the detection device.
[0019] Figure 3 This is a schematic diagram of the lifting block.
[0020] Figure 4 This is a schematic diagram of the workpiece positioning stage.
[0021] In the diagram, 1 is the test chamber; 2 is the workpiece positioning stage; 3 is the lifting drive element; 4 is the lifting block; 5 is the detector; 6 is the fingerprint authentication element; 7 is the detection indicator light; 8 is the buffer pad; 9 is the adjusting column; 11 is the guide rod; and 21 is the positioning groove. Detailed Implementation
[0022] The present invention is further illustrated by the following embodiments, which are intended to more clearly illustrate the technical solution of the present invention, and should not be construed as a limitation.
[0023] like Figures 1 to 4 The rivet detection device with fingerprint authentication shown includes a test chamber 1, a workpiece positioning stage 2 located inside the test chamber 1, a lifting drive element 3 installed inside the test chamber 1, and a lifting block 4 driven by the lifting drive element 3. The test chamber 1 is made of aluminum alloy, and the front operating surface has a rectangular opening for inserting and removing the workpiece to be tested. The workpiece positioning stage 2 is set at the bottom of the test chamber 1, and its surface is machined with a contour positioning groove 21 that matches the outer contour of the workpiece to be tested. The lifting drive element 3 is installed near the top of the test chamber 1, and its driving end is rigidly connected to the lifting block 4, driving the lifting block 4 to move up and down. A detector 5 is installed on the lifting block 4, and the detection end is vertically downward aligned with the rivet detection position of the positioning groove 21. A fingerprint authentication element 6 is embedded in the front of the test chamber to collect the operator's fingerprint information and compare it with pre-stored authorization information, and control the start and stop permissions of the lifting drive element 3 based on the comparison result.
[0024] In operation, the operator first inserts the workpiece to be tested into the positioning groove 21, ensuring that the rivet detection position is aligned with the avoidance hole. Then the fingerprint authentication element 6 performs identity verification: the system compares the collected fingerprint feature points with the pre-stored template, and after successful matching, activates the control authority of the lifting drive element 3. At this time, the operator controls the lifting drive element 3 to make the lifting block 4 move down, making the detector 5 move down to detect the presence of the rivet signal, completing a single detection.
[0025] The detector 5 can be an optical distance sensor, whose detection end is fixed vertically in the lifting block 4 mounting hole through a threaded interface, and is adjusted to be strictly aligned with the pre-set rivet installation coordinate point in the positioning groove 21 through a laser calibration instrument. The optical distance sensor axis is deviated from the vertical direction by less than ±0.5°, ensuring that the detection beam is projected vertically to the surface of the rivet. The detector 5 measures the distance value between its detection end and the obstacle below; the trigger threshold is set to be between the standard distance value from the rivet top surface to the detection end and the distance value from the rivet hole bottom to the detection end; assuming that the standard distance D1 from the rivet top surface to the detection end is 15.0±0.2mm when the rivet is correctly installed, and the distance D2 from the rivet hole bottom to the detection end is 18.0±0.2mm when the rivet is missing, the trigger threshold can be set to 16.5mm. In this way, when the detection distance value is less than the pre-set trigger threshold, it is determined that the rivet exists, otherwise it is determined that the rivet is missing. Thus, by accurately measuring the distance from the detection end to the rivet, it can be non-contact and high-precision to detect whether the rivet exists, avoiding errors and damage that may be caused by contact detection, and the response speed is fast.
[0026] The detector 5 can also be a pressure sensor, such as a micro force-sensitive resistor pressure sensor, with a detection end pointing vertically downward into the rivet installation position in the positioning groove 21, and the detection end being vertically installed on a rigid support at the bottom of the lifting block 4 through threads. The detection axis of the sensor is controlled within ±0.5° of the vertical direction, ensuring that the force direction coincides with the rivet axis. The detection end of the pressure sensor is provided with a hemispherical elastic contact head; the trigger threshold is set between the rated pressure value in the standard installation state of the rivet and the pressure value in the un-riveted state; assuming that the rated pressure F1 generated when the rivet is correctly installed is 50±2N, corresponding to a sensor output voltage of 2.5V; when the rivet is missing, the contact head does not contact or slightly contacts the workpiece surface, generating a pressure F2 of not more than 10N, corresponding to an output voltage of 0.5V; the trigger threshold can be set to 30N, corresponding to an output voltage of 1.5V. When the detected pressure value is greater than the preset trigger threshold, it is determined that the rivet exists, and vice versa. In actual debugging, a calibration device with a standard weight is used for verification: when a standard force of 30N is applied, the sensor output fluctuation range needs to be controlled within ±0.5%. In this way, by detecting the pressure change of the rivet installation position, it is determined whether the rivet exists, which has high sensitivity and reliability, can effectively avoid the structural safety hazards caused by the missing rivet, and is suitable for scenes that require accurate detection of the rivet installation state.
[0027] Further, two independent detectors 5 are provided on the lifting block 4, respectively facing two rivet positions to be detected on the workpiece to be detected; only when the two photoelectric sensors simultaneously detect the existence of the rivet, i.e. both detectors 5 return "existence" signals, the control element connected to the detector 5 generates a qualified signal, and vice versa. In this way, through logical "and" judgment, assembly defects caused by single rivet missed detection can be effectively prevented, and it is particularly suitable for workpieces with strict double-rivet installation requirements, such as automobile brake supports.
[0028] Further, a three-color LED detection indicator 7 is embedded in the inner surface of the test bin 1, and the power supply end is connected to the PLC digital output module. When the PLC receives the qualified signal of the control element, the DO1 port outputs 24V high level, driving the indicator 7 to switch to green constant state; otherwise, the DO2 port triggers red flashing with a frequency of 2Hz, and the DO3 port outputs an alarm buzzer signal with a frequency of 1kHz and a sound pressure level of 85dB. The green constant state of the indicator 7 can directly display that the qualified product passes, and the red flashing and buzzing realize instant perception of abnormal production line.
[0029] Further, when the control element receives the unqualified signal, the control of the lifting driving element 3 is locked. A safety relay module is connected in series in the control circuit of the lifting driving element 3, and when the unqualified signal is received, the lifting driving element 3 is immediately locked. After locking, only when the operator completes the identity verification in the fingerprint authentication element 6, the safety relay re-closes the control circuit, preventing the equipment from being forced to operate in the case of missing rivets, so as to fix the scene and start the traceability mechanism to find the source of the problem.
[0030] Further, the fingerprint authentication element 6 stores hierarchical permission data corresponding to each input fingerprint, including ordinary operator permission and administrator permission; the ordinary operator permission only allows equipment reset and detection operation, and the administrator permission additionally allows adjustment of trigger threshold parameters and query of historical operation records. Through hierarchical management of fingerprint permissions, ordinary operators are limited to only perform basic operations to prevent parameter misadjustment, and administrators are given key setting and query permissions, realizing accurate division of rights and responsibilities and operation traceability, and improving equipment management safety and standardization.
[0031] Further, the lifting block 4 is provided with an adjustable height adjusting column 9 at the bottom, and each adjusting column 9 is provided with a buffer pad 8 at the bottom. The adjusting column 9 has a fine thread on the side, and the rotation depth is fixed by a locking nut matched on the upper part of the adjusting column 9, and the adjustment range is ±10mm. The end of each adjusting column 9 is bonded with a buffer pad 8 of silica gel material, and the bottom of the buffer pad 8 is processed with anti-skid lines. The fine adjustment of the adjusting column 9 is to adapt the rivet detection requirements of different heights of the test device.
[0032] Further, the lifting driving element 3 is a gas cylinder, the cylinder body of which is installed on the inner wall of the test chamber 1, and the piston rod end thereof is rigidly connected with the lifting block 4; chrome-plated guide rods 11 are also vertically arranged on the two sides in the test chamber 1, and copper-based graphite self-lubricating bushings are arranged on the two sides of the lifting block 4, which form a sliding fit with the guide rods 11, so as to ensure that there is no deflection during lifting, and the positioning repeatability of the detector 5 can be within ±0.03mm.
[0033] The above embodiments are exemplary, and the purpose is to illustrate the technical concept and characteristics of the utility model, so that those skilled in the art can understand the content of the utility model and implement it, and the protection scope of the utility model cannot be limited thereby. Any equivalent changes or modifications made according to the spirit and essence of the utility model shall be covered within the protection scope of the utility model.
Claims
1. A rivet detection device with fingerprint authentication, characterized by, The application relates to a rivet detection device, which comprises a test chamber (1), a workpiece positioning table (2) in the test chamber (1), a lifting driving element (3) installed in the test chamber (1), and a lifting block (4) driven by the lifting driving element (3); the operation side of the test chamber (1) is provided with an opening for putting and taking a workpiece to be detected; the surface of the workpiece positioning table (2) is provided with a positioning groove (21) for embedding and positioning the workpiece to be detected; a detector (5) is installed on the lifting block (4) and faces downward and the positioning groove (21) to detect the existence of a rivet; the operation side of the test chamber (1) is provided with a fingerprint authentication element (6) for collecting fingerprint information of an operator and comparing the fingerprint information with pre-stored authorized information, and the start and stop permission of the lifting driving element (3) is controlled based on the comparison result. The detector (5) is an optical distance sensor, the detection end of the optical distance sensor vertically points downward to a rivet mounting position in the positioning groove (21); the detector (5) measures the distance value between the detection end and the lower obstacle; the trigger threshold value is set between the standard distance value from the top surface of the rivet to the detection end and the distance value from the bottom of the rivet hole to the detection end; when the detection distance value is smaller than the preset trigger threshold value, it is determined that the rivet exists, otherwise it is determined that the rivet is missing.
2. The rivet detection device with fingerprint authentication according to claim 1, characterized in that, The detector (5) is a pressure sensor, the detection end of the pressure sensor vertically points downward to a rivet mounting position in the positioning groove (21); the detection end of the pressure sensor is provided with a hemispherical elastic contact head; the trigger threshold value is set between the rated pressure value in the standard installation state of the rivet and the pressure value in the non-riveting state; when the detected pressure value is greater than the preset trigger threshold value, it is determined that the rivet exists, otherwise it is determined that the rivet is missing.
3. The rivet detection device with fingerprint authentication according to claim 1, characterized in that, Two independent detectors (5) are arranged on the lifting block (4) and face two rivet positions to be detected of the workpiece to be detected respectively; only when the two optical sensors simultaneously detect the existence of the rivets, a control element connected with the detectors (5) generates a qualified signal, otherwise an unqualified signal is generated.
4. The rivet detection apparatus with fingerprint authentication according to claim 2 or 3, characterized by, A detection indicating lamp (7) is further arranged in the test chamber (1), the detection indicating lamp (7) is electrically connected with the control element; when the control element receives the qualified signal, the detection indicating lamp (7) is switched to a green constant state.
5. The rivet detection device with fingerprint authentication according to claim 4, characterized in that, When the control element receives the unqualified signal, the lifting driving element (3) is controlled to be locked.
6. The rivet detection device with fingerprint authentication according to claim 4, characterized by, The fingerprint authentication element (6) stores hierarchical permission data corresponding to each input fingerprint, including ordinary operator permission and administrator permission; 7. The rivet detecting apparatus with the fingerprint authentication according to claim 2 or 3, characterized by, The ordinary operator permission only allows device reset and detection operation, and the administrator permission additionally allows adjustment of a trigger threshold parameter and query of historical operation records. An adjustable column (9) with adjustable height is arranged at the bottom of the lifting block (4), and a buffer pad (8) is arranged at the bottom of each adjustable column (9).
8. The rivet detection apparatus with fingerprint authentication according to claim 7, characterized by, The lifting driving element (3) is a gas cylinder, the cylinder body of the gas cylinder is installed on the inner wall of the test chamber (1), the piston rod tail end of the gas cylinder is rigidly connected with the lifting block (4), and a vertical guide rod (11) is further arranged in the test chamber (1) and is in sliding fit with the lifting block (4).
9. The rivet detection device with fingerprint authentication according to claim 1, characterized by, The fingerprint authentication element (6) stores hierarchical permission data corresponding to each input fingerprint, including ordinary operator permission and administrator permission; 10. The rivet detection device with fingerprint authentication according to claim 4, characterized by, The common operator permission only allows device reset and detection operation, and the administrator permission additionally allows adjustment of trigger threshold parameters and query of historical operation records.