CN216409974U - Digital display vernier caliper jump number automatic checkout device - Google Patents
Digital display vernier caliper jump number automatic checkout device Download PDFInfo
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- CN216409974U CN216409974U CN202122895089.0U CN202122895089U CN216409974U CN 216409974 U CN216409974 U CN 216409974U CN 202122895089 U CN202122895089 U CN 202122895089U CN 216409974 U CN216409974 U CN 216409974U
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Abstract
The utility model discloses an automatic detection device for the jump number of a digital display vernier caliper, which relates to the technical field of the jump number detection of the digital display vernier caliper and comprises a support column and an object stage, wherein the object stage is provided with a single chip microcomputer control unit, a two-phase stepping motor driver, a two-optical-axis ball screw linear sliding table guide rail, a two-output-axis stepping motor, an encoder, an industrial camera, a voice prompt module, a liquid crystal display screen module, a button control unit and a raspberry group main board; a screw rod sliding table is arranged on the double-optical-axis ball screw linear sliding table guide rail, and a caliper outer measuring claw clamping groove is formed in the screw rod sliding table; the two-phase stepping motor driver, the double-output-shaft stepping motor, the encoder and the button control unit are all connected with the single chip microcomputer control unit; the industrial camera, the voice prompt module and the liquid crystal display screen module are all connected with the raspberry pi main board. The device has replaced digital display slide caliper's artifical the measuring, adopts machine vision to detect, uses manpower sparingly, improves examination efficiency.
Description
Technical Field
The utility model relates to the technical field of digital display vernier caliper jump number detection, in particular to an automatic digital display vernier caliper jump number detection device.
Background
At present, a vernier caliper serving as a basic measuring tool is widely applied to measurement of internal and external dimensions of various mechanical parts all the time, in recent years, the use of a digital display vernier caliper is popularized, the mechanical vernier caliper is basically replaced, compared with the mechanical vernier caliper, the digital display vernier caliper is more convenient, more accurate and more efficient in measurement of the mechanical parts, and the defects that the reading of the traditional mechanical vernier caliper is not visual, the reading is slow, the measurement angle error is caused and the like are overcome.
In the production process of the digital display vernier caliper, the main ruler, the auxiliary ruler, the metal housing, the digital display screen, the conductive rubber, the PCB circuit main board, the capacitive grating sensor and other accessories are generally externally wrapped and customized for production, and the digital display vernier caliper is assembled by the accessories after the accessories are prepared.
When a manufacturer detects the jump number of the assembled digital display vernier caliper, a manual detection method is mostly adopted, namely, a detector manually pulls the auxiliary caliper of the caliper, and then observes the number of a display screen of the caliper by naked eyes to check whether the jump number of the caliper appears in the whole measuring range.
The manual detection method has the following disadvantages:
one is as follows: the detection personnel need to observe the numbers of the display screen by eyes for a long time, so that eye fatigue and omission are easily caused, the work is tedious, and the working enthusiasm of the detection personnel is reduced;
the second step is as follows: when different detection personnel detect the same digital display vernier caliper, the technical levels and the observation forms of the different detection personnel are different, so that the unicity of variables in the detection process is difficult to control, and the detection result of the digital display vernier caliper is easy to cause misjudgment;
and thirdly: the manual detection method is not only dull and inefficient, wastes time and labor, but also has high requirements on detection personnel, increases uncontrollable factors, and is not suitable for the concentrated jump number detection of large-batch digital vernier calipers.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects of an artificial jump number detection method and provide an automatic jump number detection device of a digital display vernier caliper, the device replaces the artificial jump number detection of the digital display vernier caliper, the device acquires images through an industrial camera to carry out visual detection, the detection result is judged, the labor is saved, the detection efficiency is improved, and the jump number detection result of the caliper is output to a liquid crystal display screen module through a raspberry group main board to be displayed.
The technical scheme for realizing the purpose of the utility model is as follows:
the automatic digital vernier caliper jump number detection device comprises an objective table, wherein a single chip microcomputer control unit, a two-phase stepping motor driver, a double-optical-axis ball screw linear sliding table guide rail, a double-output-axis stepping motor, an encoder, a voice prompt module, a liquid crystal display screen module, a button control unit and a raspberry group main board are arranged on the objective table; a wooden base is further arranged on the objective table on one side of the double-optical-axis ball screw linear sliding table guide rail, scale marks are arranged on the wooden base, a horizontal type quick clamp is fixed on the wooden base, and the head of the horizontal type quick clamp clamps the body of the digital display vernier caliper to be detected; a liftable support frame is arranged at one end of the double-optical-axis ball screw linear sliding table guide rail, an industrial camera is arranged on the liftable support frame, and the industrial camera is positioned above a digital display screen of the digital display vernier caliper to be detected and is used for collecting images of the digital display vernier caliper to be detected;
the single chip microcomputer control unit is respectively in communication connection with the button control unit and the encoder, the encoder is in communication connection with the two-phase stepping motor driver, and the two-phase stepping motor driver drives the double-output-shaft stepping motor;
the raspberry pi main board is in communication connection with the industrial camera, the voice prompt module and the liquid crystal display module respectively.
And the objective table is also provided with a power supply module for supplying power to the whole device.
The object stage is also provided with an interface module, and the interface module comprises a USB HOST interface, a USB CLIENT interface, a GPIO interface and a power supply interface; the USB HOST interface is used for connecting the industrial camera, the USB CLIENT interface is used for connecting the raspberry main board, the GPIO interface is used for connecting the singlechip control unit, and the power supply interface is used for connecting the power supply module.
The button control unit comprises 4 function buttons and 2 optical coupling limit switches; the functions of the 4 function buttons comprise starting the double-output-shaft stepping motor, stopping the double-output-shaft stepping motor, rotating the double-output-shaft stepping motor forwards, and rotating the double-output-shaft stepping motor backwards; 2 optical coupling limit switches are located two optical axis ball screw linear sliding table guide ways outsides, and its effect is when showing slide caliper and being pulled furthest or for minimumly, and 2 optical coupling limit switches make two play axle step motor be the stop condition, prevent to damage digital display slide caliper in the testing process.
The encoder adopts an incremental photoelectric rotary 600-line encoder.
Objective table, the bottom is equipped with the support column, the support column is the cylinder wood system support column of four apex angles below of objective table for being fixed in through the screw.
The raspberry pi main board is embedded with a convolution neural network model, the convolution neural network model carries out digital identification on a digital display area image of the digital display vernier caliper by 20 frames per second, and a detection result is output; the detection result is transmitted to the voice prompt module and the liquid crystal display screen module in the form of an electric signal, wherein the voice prompt module is used for prompting the detection state of the digital display vernier caliper, and the liquid crystal display screen module is used for displaying the real-time detection result of the digital display vernier caliper.
The raspberry pi main board is embedded with a program for automatically generating a digital display vernier caliper jump number detection report function, the program is compiled by technicians in the field according to functional requirements, and the detection report can be viewed or downloaded in a file form after the detection is finished.
The automatic digital display vernier caliper jump number detection device provided by the utility model has the following advantages:
(1) be equipped with the outer measuring jaw draw-in groove of slide caliper rule on the lead screw slip table, the rotatory draw-in groove knob of accessible carries out suitable regulation according to the outer measuring jaw size of standard digital display slide caliper rule, guarantee the fixed fastness of outer measuring jaw, the other wood system base that is equipped with appointed height of two optical axis ball screw linear sliding table guide rails simultaneously, wood system base top is drawn with the scale mark and has horizontal quick clamp through the screw fixation, horizontal quick clamp head presss from both sides tight digital display slide caliper rule body, guarantee that digital display slide caliper rule whole body keeps quiescent condition when external force pulling, effectively avoided the detection error because of the displacement of rule body position causes.
(2) Two optical axis ball screw linear sliding table guide rail outside 2 optical coupling limit switch's setting, effectively avoided when number display slide caliper is pulled furthest or minimums, two play axle step motor continue to rotate and lead to digital display slide caliper to damage, when digital display slide caliper is pulled furthest or minimums simultaneously, raspberry group mainboard can send the signal of telecommunication to the voice prompt module rather than being connected, voice prompt module carries out safety suggestion with pronunciation form afterwards.
(3) The device adopts visual detection technology in digital display slide caliper jump number testing process, has characteristics such as detect accuracy height, cycle are short, simple operation, and greatly degree has alleviateed measurement personnel's intensity of labour simultaneously, has improved detection efficiency.
Drawings
FIG. 1 is a schematic perspective view of an automatic digital vernier caliper jump number detecting device;
FIG. 2 is a top view of an automatic digital vernier caliper jump number detecting device;
FIG. 3 is a front view of an automatic digital vernier caliper jump number detecting device;
FIG. 4 is a block diagram of the communication among the SCM control unit, the raspberry pi board, and other modules;
in the figure: 1. a support pillar; 2. an object stage; 3. a two-phase stepper motor driver; 4. a liquid crystal display module; 5. a raspberry pi main board; 6. a voice prompt module; 7. a power supply module; 8. horizontal quick clamp; 9. a wooden base; 10. a singlechip control unit; 11. an encoder; 12. a stainless steel lifting bracket; 13. a double-output-shaft stepping motor; 14. an industrial camera; 15. a button control unit; 16. a digital display vernier caliper; 17. measuring a jaw clamping groove outside the caliper; 18. a screw rod sliding table; 19. double-optical-axis ball screw linear sliding table guide rail.
Detailed Description
The utility model will be further elucidated with reference to the drawings and examples, without however being limited thereto.
As shown in fig. 1, 2, 3 and 4:
an automatic digital display vernier caliper jump number detection device comprises a support column 1 and an object stage 2, wherein the support column 1 is used for bearing the object stage 2, the object stage 2 is fixed at the top of the support column 1 through screws, a single chip microcomputer control unit 10 is arranged at the upper right end of the surface of the object stage 2, a power supply module 7 is arranged on the left side of the single chip microcomputer control unit 10, a voice prompt module 6 is arranged adjacent to the left side of the power supply module 7, a two-phase stepping motor driver 3 is arranged on the left side of the voice prompt module 6, a liquid crystal display module 4 and a raspberry group mainboard 5 are respectively arranged in the middle of the lower part of the two-phase stepping motor driver 3 from left to right, a double-optical-axis ball screw linear sliding table guide rail 19 is arranged below the raspberry group mainboard 5, a double-axis ball screw linear sliding table guide rail 13 and an encoder 11 are arranged on the rightmost side of the double-optical-axis ball screw linear sliding table guide rail 19, and a screw sliding table 18 is arranged in the middle of the double-optical-axis ball screw linear sliding table guide rail 19, an outer measuring jaw clamping groove 17 of the digital display vernier caliper 16 is fixed on the screw rod sliding table 18, the outer measuring jaw clamping groove 17 of the digital display vernier caliper 16 is used for fixing an outer measuring jaw of the digital display vernier caliper 16, the digital display vernier caliper 16 is placed on the wooden base 9 at the bottom of the digital display vernier caliper 16, scale marks are drawn on the upper right of the wooden base 9, a horizontal quick clamp 8 is fixed through screws, the head of the horizontal quick clamp 8 clamps the body of the digital display vernier caliper 16, an industrial camera 14 is arranged above a digital display screen of the digital display vernier caliper 16, the industrial camera 14 is supported by a stainless steel lifting support 12, the stainless steel lifting support 12 is located at the middle position of the rightmost side of the objective table 2, and a button control unit 15 is further arranged above the lower right side of the objective table 2; the two-phase stepping motor driver 3, the double-output-shaft stepping motor 13, the encoder 11 and the button control unit 15 are all connected with the single chip microcomputer control unit 10, and the industrial camera 14, the voice prompt module 6 and the liquid crystal display screen module 4 are all connected with the raspberry pi main board 5.
The object stage is also provided with an interface module, and the interface module comprises a USB HOST interface, a USB CLIENT interface, a GPIO interface and a power supply interface; the USB HOST interface is used for connecting the industrial camera, the USB CLIENT interface is used for connecting the raspberry main board, the GPIO interface is used for connecting the singlechip control unit, and the power supply interface is used for connecting the power supply module.
The single chip microcomputer control unit can generate square wave pulse signals to be supplied to the two-phase stepping motor driver, and can also control the double-output-shaft stepping motor to rotate in the forward direction and the reverse direction.
The two-phase stepping motor driver has the input pulse frequency of 100HZ-10KHZ, and has the characteristics of low speed anti-shake, noise reduction, phase dislocation, overcurrent protection and the like.
The encoder is an incremental photoelectric rotary 600-line encoder.
The industrial camera is supported by a stainless steel lifting support, is a USB2.0 industrial camera with resolution of 2048 x 1536 and is used for acquiring digital images of a digital display area of the digital display vernier caliper and transmitting real-time detection images of the digital display vernier caliper to the raspberry pi main board and the liquid crystal display screen module.
The button control unit comprises 4 function buttons and 2 optical coupling limit switches; the functions of the 4 function buttons comprise starting the double-output-shaft stepping motor, stopping the double-output-shaft stepping motor, rotating the double-output-shaft stepping motor forwards, and rotating the double-output-shaft stepping motor backwards; wherein 2 optical coupling limit switches are located two optical axis ball screw straight line slip table guide rails outsides, and its effect is when showing slide caliper and being pulled furthest or for minimumly, 2 optical coupling limit switches make two play axle step motor are the stop condition, prevent to damage digital display slide caliper in the testing process.
The raspberry pi main board internally comprises a convolution neural network model, the convolution neural network model carries out digital identification on a digital display area image of the digital display vernier caliper by 20 frames per second, and a detection result is output.
The output detection result is transmitted to the voice prompt module and the liquid crystal display screen module in the form of an electric signal, wherein the voice prompt module is used for prompting the detection state of the digital display vernier caliper, and the liquid crystal display screen module is used for displaying the real-time detection result of the digital display vernier caliper.
The raspberry pi main board also comprises a function of automatically generating a digital display vernier caliper jump number detection report, and the detection report can be checked or downloaded in a file form after the detection is finished.
The working mode of the embodiment is as follows:
firstly, a tester places a digital vernier caliper 16 to be tested on a wooden base 9 at the bottom of the digital vernier caliper, horizontally embeds an outer measuring claw of the digital vernier caliper 16 into a caliper outer measuring claw clamping groove 17 fixed on a screw rod sliding table 18, fixes a body of the digital vernier caliper 16 through a rubber sleeve at the head of a horizontal quick clamp 8, then switches on a power supply module 7, presses a start function button of a button control unit 15 after a raspberry group main board 5 is initialized through a liquid crystal display module 4, then the raspberry group main board 5 sends an instruction to a single chip microcomputer control unit 10 through an internal algorithm, the single chip microcomputer control unit 10 generates a square wave pulse signal to supply to a two-phase stepping motor driver 3, the two-phase stepping motor driver 3 transmits an electric signal to a double-output-shaft stepping motor 13 through an encoder 11, and drives a double-optical-axis ball screw rod linear sliding table guide rail 19 to move in the horizontal direction through the rotation of the double-output-shaft stepping motor 13, the method comprises the steps that a double-optical-axis ball screw linear sliding table guide rail 19 moves in the horizontal direction and simultaneously drives a caliper outer measuring claw clamping groove 17 arranged on a screw sliding table 18, a digital display vernier caliper 16 enters a hop number detection state, an industrial camera 14 located above the digital display vernier caliper 16 transmits collected images to a raspberry sending main board 5 in real time and performs 20 frames of hop number detection calculation per second, hop number detection results and real-time detection images are transmitted to a liquid crystal display screen module 4, after detection is finished, a detector receives final hop number detection results through a voice prompt module 6 and the liquid crystal display screen module 4, the detector can check or download automatically generated hop number detection reports in a mode of touching software interface function buttons of the liquid crystal display screen module 4, and finally, the detector can analyze or archive the hop number detection reports.
Claims (6)
1. The automatic digital vernier caliper jump number detection device is characterized by comprising an objective table, wherein a single chip microcomputer control unit, a two-phase stepping motor driver, a double-optical-axis ball screw linear sliding table guide rail, a double-output-axis stepping motor, an encoder, a voice prompt module, a liquid crystal display screen module, a button control unit and a raspberry group main board are arranged on the objective table; a wooden base is further arranged on the objective table on one side of the double-optical-axis ball screw linear sliding table guide rail, scale marks are arranged on the wooden base, a horizontal type quick clamp is fixed on the wooden base, and the head of the horizontal type quick clamp clamps the body of the digital display vernier caliper to be detected; a liftable support frame is arranged at one end of the double-optical-axis ball screw linear sliding table guide rail, an industrial camera is arranged on the liftable support frame, and the industrial camera is positioned above a digital display screen of the digital display vernier caliper to be detected and is used for collecting images of the digital display vernier caliper to be detected;
the single chip microcomputer control unit is respectively in communication connection with the button control unit and the encoder, the encoder is in communication connection with the two-phase stepping motor driver, and the two-phase stepping motor driver drives the double-output-shaft stepping motor;
the raspberry pi main board is in communication connection with the industrial camera, the voice prompt module and the liquid crystal display module respectively.
2. The automatic digital vernier caliper jump number detection device according to claim 1, wherein a power module is further provided on the stage for supplying power to the whole device.
3. The automatic digital vernier caliper jump number detection device according to claim 2, wherein the stage is further provided with an interface module, the interface module comprises a USB HOST interface, a USB CLIENT interface, a GPIO interface and a power supply interface; the USB HOST interface is used for connecting the industrial camera, the USB CLIENT interface is used for connecting the raspberry main board, the GPIO interface is used for connecting the singlechip control unit, and the power supply interface is used for connecting the power supply module.
4. The automatic digital vernier caliper jump number detecting device according to claim 1, wherein the button control unit comprises 4 function buttons and 2 optical coupling limit switches.
5. The automatic digital vernier caliper jump number detecting device according to claim 1, wherein the encoder is an incremental photoelectric rotary 600-line encoder.
6. The automatic digital vernier caliper jump number detecting device according to claim 1, wherein the bottom of the objective table is provided with a support column, and the support column is a cylindrical wooden support column fixed below four top corners of the objective table through screws.
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| CN202122895089.0U CN216409974U (en) | 2021-11-24 | 2021-11-24 | Digital display vernier caliper jump number automatic checkout device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116817700A (en) * | 2023-08-25 | 2023-09-29 | 苏州英示测量科技有限公司 | Caliper quality detection method and system |
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- 2021-11-24 CN CN202122895089.0U patent/CN216409974U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116817700A (en) * | 2023-08-25 | 2023-09-29 | 苏州英示测量科技有限公司 | Caliper quality detection method and system |
| CN116817700B (en) * | 2023-08-25 | 2023-11-24 | 苏州英示测量科技有限公司 | Caliper quality detection method and system |
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