CN112596002B - Automatic testing method for color backlight module of notebook computer keyboard - Google Patents
Automatic testing method for color backlight module of notebook computer keyboard Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
- G01R31/70—Testing of connections between components and printed circuit boards
- G01R31/71—Testing of solder joints
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G47/00—Article or material-handling devices associated with conveyors; Methods employing such devices
- B65G47/74—Feeding, transfer, or discharging devices of particular kinds or types
- B65G47/90—Devices for picking-up and depositing articles or materials
- B65G47/91—Devices for picking-up and depositing articles or materials incorporating pneumatic, e.g. suction, grippers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
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- G—PHYSICS
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- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
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- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
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- G01J1/38—Photometry, e.g. photographic exposure meter using wholly visual means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/89—Investigating the presence of flaws or contamination in moving material, e.g. running paper or textiles
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/44—Testing lamps
Abstract
An automatic testing method for a color backlight module of a notebook computer keyboard comprises the following steps: a pneumatic sucker on the mechanical arm sucks up a test sample and places the test sample on the upper surface of the test equipment main body, and an LED lamp of the test sample is placed in a window of the color sensor; the pressing platform descends, the pressing probe presses the back of the LED lamp to enable the test sample to generate micro deformation, and the test probe on the pressing platform presses the golden finger of the test sample; the test circuit board judges that if a feedback signal of a loop formed by the test probe and the golden finger of the test sample is received, current signal data are collected and sent to the data processing unit after the condition that poor contact does not exist in the connection of the test probe and the golden finger of the test sample is determined; the color sensor collects brightness signal data of the LED lamp and sends the brightness signal data to the data processing unit. The invention solves the problems that the false welding condition of the LED lamp cannot be eliminated and the brightness difference of different LED lamps cannot be accurately mastered by manual visual inspection in the current notebook computer color backlight module detection.
Description
Technical Field
The invention relates to the field of testing of color backlight modules, in particular to an automatic testing method of a color backlight module of a notebook computer keyboard.
Background
The backlight module of the notebook computer keyboard is arranged below the notebook computer keyboard, and the possibility of using the keyboard in a scene with dark ambient light is enhanced by emitting light. With the reduction of the production cost of the backlight module of the notebook computer keyboard, people have aesthetic changes to the backlight of the keyboard, and the backlight of the colored notebook computer keyboard gradually becomes a trend. However, the color backlight module of the notebook computer is basically detected by manual visual inspection, so that false welding of the RGB-LED lamp cannot be eliminated, and the brightness difference of different LED lamps cannot be accurately grasped. Along with the increase of the working time of detection personnel, the eye fatigue degree deepens, and the color sensitivity degree is reduced, so that the reliability of a detection result cannot be ensured.
Therefore, a technical scheme for automatically testing a color backlight module of a notebook computer keyboard is needed at present, and the problems that the detection of the color backlight module of the notebook computer is finished through manual visual inspection, the false welding condition of the RGB-LED lamp cannot be eliminated, the brightness difference of different LED lamps cannot be accurately grasped, and simultaneously, the eye fatigue degree is deepened along with the increase of the working time of detection personnel, the color sensitivity degree is reduced, and the reliability of a detection result cannot be ensured are solved.
Disclosure of Invention
The invention provides an automatic test method of a color backlight module of a notebook computer keyboard, which aims to solve the problems that the conventional color backlight module of the notebook computer is detected by manual visual inspection, the false welding condition of RGB-LED lamps cannot be eliminated, the brightness difference of different LED lamps cannot be accurately mastered, and simultaneously, the eye fatigue degree is deepened along with the increase of the working time of a detector, the color sensitivity degree is reduced, and the reliability of a detection result cannot be ensured.
In order to solve the above problems, the present invention provides an automatic testing method for a color backlight module of a notebook computer keyboard, comprising:
a pneumatic sucker on the mechanical arm sucks up a test sample of the color backlight module of the notebook computer keyboard and places the test sample on the upper surface of the test equipment main body, and RGB-LED lamps of the test sample fall in a color sensor window; wherein, be provided with in the test equipment main part: the test device comprises a servo push rod motor, a mechanical arm, a pressing platform, a pressing probe, a test circuit board and a data processing unit, wherein the pressing platform is arranged on a push rod of the servo push rod motor and moves up and down along with the servo push rod motor; arranging a test circuit board and a data processing unit in a test equipment main body, welding color sensors on the test circuit board, and arranging the color sensors on the upper surface of the test equipment main body in a windowing manner; a pressing probe and a testing probe are arranged on the pressing platform, and the pressing probe is arranged at a position, corresponding to the position right above the window of the color sensor, on the pressing platform; arranging a test probe at a position, corresponding to the position right above the gold finger of the test sample, on the pressing platform;
after the data processing unit controls the servo push rod motor to drive, the pressing platform performs descending motion, a pressing probe on the pressing platform presses down on the back side of the RGB-LED lamp on the test sample, so that the test sample generates micro-deformation, and meanwhile, the test probe on the pressing platform presses down on a golden finger of the test sample;
the test circuit board judges that if a feedback signal of a loop formed by the test probe and the golden finger of the test sample is received, current signal data are collected and sent to the data processing unit after the condition that poor contact does not exist in the connection of the test probe and the golden finger of the test sample is determined; the color sensor collects brightness signal data of the RGB-LED lamp and sends the brightness signal data to the data processing unit, and testing of a test sample of the notebook computer keyboard color backlight module is completed.
Further, the method may further include: pneumatic sucking disc on the arm sucks up notebook computer keyboard color backlight unit's test sample and places before the step of the upper surface of test equipment main part, still includes: after the test sample is conveyed to the position below the high-speed camera by the feeding conveyor belt device, the high-speed camera scans the image of the test sample and transmits the image data to the data processing unit; the data processing unit analyzes whether the test sample has a state of poor appearance and obtains position data of the test sample according to the received image data, and sends the position data of the test sample to the mechanical arm; the mechanical arm controls the pneumatic sucker to suck up the test sample of the color backlight module of the notebook computer keyboard and place the test sample on the upper surface of the test equipment main body according to the obtained position data of the test sample; the test equipment comprises a test equipment main body, a mechanical arm, a pneumatic sucker and a feeding conveyor belt device, wherein the test equipment main body is also provided with the feeding conveyor belt device, a high-speed camera support, a high-speed camera and a discharging conveyor belt device; the high-speed camera support is arranged at a position, close to the left side of the rear end, of the testing equipment main body, and the high-speed camera is arranged on the high-speed camera support and is arranged at a position right above the feeding conveyor belt device.
Further, the method may further include: the upper surface of the testing equipment main body is provided with a testing sample placing groove, the shape of a groove for arranging the testing sample placing groove is matched with the shape of a testing sample, the testing sample can be placed in the testing sample placing groove, a plurality of color sensor windows are arranged in the testing sample placing groove, and the shape and the position of each color sensor window are matched with the shape and the position of each RGB-LED lamp of the corresponding testing sample; the step that the arm is according to the position data of the test sample that obtains, control pneumatic sucking disc and suck up the test sample of the colored backlight unit of notebook computer keyboard and place the upper surface to the test equipment main part includes: and the mechanical arm controls the pneumatic sucker to suck the test sample of the color backlight module of the notebook computer keyboard and place the test sample into the test sample placing groove on the upper surface of the test equipment main body according to the obtained position data of the test sample, wherein the RGB-LED lamp of the test sample is placed in the color sensor window, and then the mechanical arm resets.
Further, the method may further include: the testing sample of the color backlight module of the notebook computer keyboard is in a T shape, a golden finger is arranged at the end part of the vertical bar extending outwards, the golden finger comprises 4 terminals, a sample identity identification code is arranged on the vertical bar on the front side of the testing sample, and a plurality of RGB-LED lamps which are uniformly arranged are arranged on the horizontal bar on the back side of the testing sample;
the high-speed camera carries out image scanning to the test sample to after transmitting image data to data processing unit, still include: and the data processing unit records the data of the sample identification code on the test sample according to the received image data.
Further, the method may further include: the test equipment main body is also provided with a servo push rod motor bracket, the servo push rod motor bracket is arranged on the test equipment main body and is close to the middle part of the rear end, and the servo push rod motor is arranged on the test equipment main body through the servo push rod motor bracket; the mechanical arm is arranged on the test equipment main body and close to the middle part of the front end; the inside of the test equipment main body is also provided with a wireless network access unit, wherein the data processing unit, the wireless network access unit, the high-speed camera, the servo push rod motor, the blanking conveying belt device, the feeding conveying belt device, the mechanical arm, the test probe, the test circuit board, the color sensor and the test sample are electrically connected.
Further, the method may further include: the test circuit board comprises a main control chip (U1), a current measurement chip (U5), an optical coupling isolation chip (U8), a relay (K1) and a test sample circuit (U3), wherein the current measurement chip (U5), the optical coupling isolation chip (U8), the relay K1) and the test sample circuit (U3) are all connected with the main control chip (U1).
Further, the method may further include: the test probes comprise 4 test probes, wherein a first test probe is connected with the main control chip (U1), a second test probe is connected with the common end of the relay (K1), a third test probe is connected with the normally closed end of the relay (K1), and a fourth test probe is grounded; the first terminal and the second terminal of the golden finger of the test sample are connected with a VCC end in the test sample circuit (U3), and the third terminal and the fourth terminal of the golden finger of the test sample are connected with a GND end in the test sample circuit (U3).
Further, the method may further include: the test probe is pressed down on a golden finger of the test sample, and the method further comprises the following steps: the first test probe presses down on the first terminal of the golden finger of the test sample, the second test probe presses down on the second terminal of the golden finger of the test sample, the third test probe presses down on the third terminal of the golden finger of the test sample, and the fourth test probe presses down on the fourth terminal of the golden finger of the test sample.
Further, the method may further include: the step that the test circuit board judges that if a feedback signal of a loop formed by the test probe and the golden finger of the test sample is received, after the condition that poor contact does not exist in the connection of the test probe and the golden finger of the test sample is determined, current signal data are collected and sent to the data processing unit, the step comprises the following steps:
the Detection end of a main control chip (U1) of the test circuit board is pulled down to GND through a diode (D23), a first test probe, a first terminal of a golden finger, a second terminal of the golden finger, a second test probe, a common end of a relay (K1), a normally closed end of the relay (K1), a third test probe, a third terminal of the golden finger, a fourth terminal of the golden finger and a fourth test probe, and then if a pull-down signal is captured, the test probe and the golden finger of the test sample are judged to be in a good contact state;
the main control chip (U1) enables the optical coupling isolation chip (U8) to be closed by switching the level of the Switch end, the triode (Q3) is conducted, one end of the relay (K1) connected with the collector is pulled down to GND, the common end of the relay (K1) is connected with the normally open end, and the second test probe is connected to the IN-end of the current measurement chip (U5); the current flows from a power supply network (VCC 5) through a current sampling resistor (R51) and a VCC end of a test sample circuit (U3) contacted by a second test probe, and flows out from the GND end; the current measuring chip (U5) collects current signal data and sends the current signal data to the data processing unit.
Further, the method may further include: the color sensor collects brightness signal data of the RGB-LED lamp and sends the brightness signal data to the data processing unit, and the step of testing a test sample of the color backlight module of the notebook computer keyboard is completed, and the color backlight module testing device further comprises the following steps:
the color sensor is a high-precision color sensor, collected red, green and blue light brightness of the RGB-LED lamp is converted into 65536-level brightness signal data, the data are sent to the data processing unit, the data processing unit controls the servo push rod motor to drive the pressing platform to move upwards, the pneumatic sucker on the mechanical arm sucks up a test sample in the test sample placing groove and sends the test sample to the blanking conveyor belt device, and test on the test sample of the notebook computer keyboard color backlight module is completed.
By the scheme, the collected red, green and blue light brightness of the RGB-LED lamp is converted into 65536-level brightness signal data through the high-precision color sensor, so that the brightness value is accurately controlled, and the integral light emitting impression of the backlight module is consistent; the method comprises the steps that the back face of a position where an RGB-LED lamp of a test sample of the color backlight module of the notebook computer is located is extruded through a pressing probe, so that a flexible circuit board generates micro-deformation, and whether the RGB-LED lamp has a false welding condition or not is judged by combining data collected by a current detection circuit and data collected by a color sensor; the contact test of 4 terminals of the golden finger is realized through the relay K1 and the test sample circuit U3, so that the contact of the golden finger is ensured to be normal, and the problem of poor contact caused by the oxidation or scratch of the golden finger is avoided; the pneumatic sucker on the mechanical arm is used for feeding and receiving materials, the whole testing process avoids manual participation, the process is reliable, and the efficiency is improved; the method comprises the steps of carrying out appearance detection on the color backlight module of the notebook computer before feeding through the high-speed camera, collecting data of a sample identification code on the color backlight module of the notebook computer, binding detection result data and the data of the sample identification code and uploading the binding result data and the data of the sample identification code to a cloud server for subsequent sorting and tracing of products, wherein image data collected by the high-speed camera are also used for positioning and calibrating in the feeding process of a mechanical arm. The method is simple in measurement, visual in reading, high in measurement accuracy and resolution ratio, suitable for automatic batch production testing of factories and capable of improving working efficiency.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a flowchart illustrating an automatic testing method for a color backlight module of a notebook computer keyboard according to the present application;
FIG. 2 is a schematic structural diagram of a front side of a test sample of a color backlight module for a notebook computer keyboard according to an embodiment of the present application;
FIG. 3 is a schematic structural diagram of a reverse side of a test sample of a color backlight module for a notebook computer keyboard according to an embodiment of the present application;
FIG. 4 is a schematic diagram of a circuit structure of a test circuit board according to an embodiment of the present application;
FIG. 5 is a schematic structural diagram of an automatic testing apparatus for a color backlight module of a notebook computer keyboard according to an embodiment of the present application;
fig. 6 is a schematic diagram showing a state where the push-down probe is about to be pushed down to the back surface of the RGB-LED lamp of the test sample when the push-down stage 7 is lowered in the example of the present application.
Detailed Description
To make the objects, technical solutions and advantages of the present application more clear, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
The application provides an automatic testing method of a color backlight module of a notebook computer keyboard, as shown in fig. 1, comprising the following steps:
the test equipment comprises a test equipment main body, a test equipment main body and a mechanical arm, wherein the test equipment main body is also provided with a feeding conveyor belt device, a high-speed camera support, a high-speed camera and a discharging conveyor belt device, the feeding conveyor belt device is arranged at a position, close to the left end, on the test equipment main body, the discharging conveyor belt device is arranged at a position, close to the right end, on the test equipment main body, the feeding conveyor belt device and the discharging conveyor belt device roll through conveyor belts to realize feeding, and a test sample is conveyed to a sucking-up position preset by a pneumatic sucker on the mechanical arm (the feeding conveyor belt device and the discharging conveyor belt device can improve the working efficiency of the automatic test equipment); the high-speed camera support is arranged at a position, close to the left side of the rear end, of the testing equipment main body, and the high-speed camera is arranged on the high-speed camera support and is arranged at a position right above the feeding conveyor belt device. (carry out outward appearance detection to the colored backlight unit of notebook computer before the material loading through high-speed camera to sample identification code on the colored backlight unit of notebook computer is gathered, bind the data of testing result data and sample identification code and upload to the high in the clouds server, be used for subsequent letter sorting of product and trace to the source, wherein, the image data that high-speed camera was gathered can also be used for the location and the calibration of the pneumatic chuck material loading in-process on the arm).
Further comprising: as shown in fig. 2 and 3, the test sample of the color backlight module for the notebook computer keyboard is T-shaped, a golden finger is arranged at the end of the vertical bar extending outwards, the golden finger 12 is arranged on the front side of the test sample 10 in fig. 2, the golden finger comprises 4 terminals, a sample identification code 11 is arranged on the vertical bar on the front side of the test sample, and a plurality of RGB-LED lamps 13 are uniformly arranged on the horizontal bar on the back side of the test sample in fig. 3; (the sample identification code is a two-dimensional code for recording the basic information of the test sample, and is used for subsequent sorting and tracing of products, the information of the test sample can be traced through the sample identification code, and if the test sample has problems, the problems existing in the production stage can be further traced through the sample identification code).
The high-speed camera carries out image scanning to the test sample to after transmitting image data to data processing unit, still include: and the data processing unit records the data of the sample identification code 11 on the test sample according to the received image data.
Further comprising: the test equipment main body is also provided with a servo push rod motor bracket, the servo push rod motor bracket is arranged on the test equipment main body and is close to the middle part of the rear end, and the servo push rod motor is arranged on the test equipment main body through the servo push rod motor bracket; the mechanical arm is arranged on the test equipment main body and close to the middle part of the front end; the inside of the test equipment main body is also provided with a wireless network access unit, wherein the data processing unit, the wireless network access unit, the high-speed camera, the servo push rod motor, the blanking conveying belt device, the feeding conveying belt device, the mechanical arm, the test probe, the test circuit board, the color sensor and the test sample are electrically connected. (the setting of above-mentioned electricity connection forms a return circuit, main control chip U1 of test circuit board passes through protection end, diode D23, first test probe, the first terminal of golden finger, the second test probe, relay K1 common port, relay K1 normally closes the end, the third test probe, the third terminal of golden finger, the fourth terminal of golden finger and fourth test probe can catch the pull-down signal after pulling down to GND, judge whether test probe and test sample golden finger are good state of contact or not).
further comprising: the upper surface of the testing equipment main body is provided with a testing sample placing groove, the shape of the groove of the testing sample placing groove is matched with the shape of a testing sample, and the testing sample can be placed in the testing sample placing groove; the step that the arm is according to the position data of the test sample that obtains, and the pneumatic sucking disc is sucked up the test sample of the colored backlight unit of notebook computer keyboard and is placed the upper surface of test equipment main part includes: the mechanical arm controls the pneumatic sucker to suck up a test sample of the color backlight module of the notebook computer keyboard and place the test sample into the test sample placing groove on the upper surface of the testing equipment main body according to the obtained position data of the test sample, wherein RGB-LED lamps of the test sample fall into the color sensor window (light emitted by the RGB-LED lamps can penetrate through the color sensor window to be emitted onto the color sensor), and then the mechanical arm resets. (the shape of the groove of the test sample placement groove is in accordance with the shape of the test sample, a plurality of color sensor windows are arranged in the test sample placement groove, the shape and position of each color sensor window are adapted to the shape and position of each RGB-LED lamp of the corresponding test sample, so that the test sample can be accurately positioned in the test process, the correct operation of the position of the pressing probe for pressing the back of the RGB-LED lamp of the color backlight module of the notebook computer at the next step can be conveniently ensured, the correct operation of the position of the pressing probe for pressing the golden finger of the test sample can also be ensured, and the normal operation of the test is finally ensured); (the test sample is sucked up by the pneumatic sucker and placed in the test sample placing groove; the pneumatic sucker on the mechanical arm is used for feeding and receiving materials, the whole test process avoids manual participation, the process is reliable, and the efficiency is improved).
The test circuit board comprises a main control chip U1, a current measurement chip U5, an optical coupling isolation chip U8, a relay K1 and a test sample circuit U3, wherein the current measurement chip U5, the optical coupling isolation chip U8, the relay K1 and the test sample circuit U3 are all connected with the main control chip U1.
As shown in fig. 4, the main control chip U1 includes 3 pins, where the IIC bus pin includes an IIC-SCL pin and an IIC-SDA pin, and is connected to the IIC communication interface of the current measurement chip U5 after being pulled up to 3.3V through two current limiting resistors R47 and R39, respectively (the resistance values of the two current limiting resistors R47 and R39 are set to 10K Ω, which ensures the stability of current limiting and the safety of the automatic test device); current measurement chip U5 includes pins A1, A0, SDA, SCL, IN +, IN-, GND, and Vs; the SDA and the SCL are IIC bus communication interfaces and are connected to a main control chip U1; a0 and A1 are IIC address switching pins, and 4 different IIC addresses are set through level configuration of A0 and A1; vs is a power supply end connected to a VCC3.3 power supply network, and power supply filtering processing is carried out through a capacitor C27 (the value of the capacitor C27 is 100nF, so that a good filtering effect can be ensured); a current sampling resistor R51 is connected between the IN + and the IN-, the IN + end is connected with a VCC5 power supply network, and the IN-end is connected with the normally open end of the relay K1; the resistance value of the current sampling resistor R51 is 0.1 omega, (the resistance value of the current sampling resistor R51 is set to be 0.1 omega, so that the current sampling precision is improved, the precision is less than or equal to 1 percent, and the design requirement working power is 1W); the driving circuit of the relay K1 consists of an optocoupler isolation chip U8 and a triode Q3 (the action of the optocoupler isolation chip U8 is more sensitive through the secondary amplification effect of the triode Q3, the control is smoother, and besides the increase of the driving capability, the triode Q3 can also greatly increase the linear slope of the optocoupler isolation chip U8, so that the control efficiency is improved); one end of a coil of the relay K1 is connected with a VCC5 network, the other end of the coil is connected with a collector of the triode Q3, the middle of the relay K1 adopts a resistor R46 for current limiting, and the resistance value of the R46 is 10K omega (the resistance value of the current limiting resistor R46 is set to be 10K omega, so that the stability of current limiting is ensured, and the safety of an automatic testing device is ensured); in addition, both ends of a coil of the relay K1 are connected with a freewheeling diode D22, a cathode of the freewheeling diode D22 is connected with the power supply network VCC5, and an anode of the freewheeling diode D22 is connected with the other end of the coil of the relay K1 (the freewheeling diode D22 can protect the safety of the relay K1); in addition, two ends of a coil of the relay K1 are connected with a light-emitting diode D21 in parallel, the anode of the light-emitting diode D21 is connected to a power supply network VCC5, a resistor R48 is used in the middle of the relay K1 for current limiting, and the resistance value of the resistor R48 is 10K omega (the setting of the light-emitting diode D21 and the setting of the resistance value of the current-limiting resistor R48 to 10K omega ensures the stability of current limiting and the safety of the automatic testing device); the cathode of the light-emitting diode D21 is connected to the other end of the coil of the relay K1; the anode of the optical coupling isolation chip U8 is pulled up to 3.3V through a resistor R45 (the resistance value of a load resistor R45 is 10K omega, the stability of voltage is ensured), and is connected to the Switch end of the main control chip U1, the cathode of the optical coupling isolation chip U8 is grounded, the collector of the optical coupling isolation chip U8 is pulled up to 5V through a resistor R44 (the resistance value of the load R44 is 10K omega, the stability of voltage is ensured), and is connected to the base of the triode Q3, and the emitter of the optical coupling isolation chip U8 is grounded; the Detection end of the main control chip U1 is pulled up to 3.3V through a resistor R50 (the resistance value of the load resistor R50 is 10K Ω, which ensures the stability of voltage), and is connected to the first test probe through a diode D23; the second test probe is connected to the common end of the relay K1, the third test probe is connected to the normally closed end of the relay K1, and the fourth test probe is grounded.
in the step, the back face of the position where the RGB-LED lamp of the test sample of the color backlight module of the notebook computer is located is extruded through the press probe, so that the flexible circuit board is slightly deformed, and then the condition that whether the RGB-LED lamp has the false welding or not is judged by combining the data collected by the current detection circuit and the data collected by the color sensor (the number of the press probes is multiple, the number of the press probes is consistent with that of the RGB-LED lamp of the test sample of the color backlight module of the notebook computer, and each press probe corresponds to the RGB-LED lamp of the test sample of the color backlight module of the notebook computer.
The test probes comprise 4 test probes, wherein a first test probe is connected with the main control chip U1, a second test probe is connected with the common end of the relay K1, a third test probe is connected with the normally closed end of the relay K1, and a fourth test probe is grounded; the first terminal and the second terminal of the golden finger of the test sample are connected with a VCC end in the test sample circuit U3, and the third terminal and the fourth terminal of the golden finger of the test sample are connected with a GND end in the test sample circuit U3. (specifically, the Detection end of the main control chip U1 is pulled up to 3.3V through a resistor R50 and is connected to a first test probe through a diode D23; a second test probe is connected to the common end of the relay K1, a third test probe is connected to the normally closed end of the relay K1, a fourth test probe is grounded; a first terminal of a golden finger and a second terminal of the golden finger on a test sample are connected to VCC in the test sample circuit U3, and a third terminal of the golden finger and a fourth terminal of the golden finger are connected to a GND end in the test sample circuit U3); the contact test of 4 terminals of the golden finger is realized through the relay K1 and the test sample circuit U3 on the test circuit board, the contact of the golden finger is ensured to be normal, and the problem that the golden finger is poor in contact caused by oxidation or scratch is avoided.
The test probe is pressed down on a golden finger of a test sample, and the test probe further comprises: the first test probe presses down on the first terminal of the golden finger of the test sample, the second test probe presses down on the second terminal of the golden finger of the test sample, the third test probe presses down on the third terminal of the golden finger of the test sample, and the fourth test probe presses down on the fourth terminal of the golden finger of the test sample. The four terminals of the four test probes and the four terminals of the golden finger are contacted, so that the integrity of the golden finger test can be ensured, each terminal of the golden finger is subjected to the contact test, the normal contact of the whole golden finger is ensured, and the problem that the golden finger is oxidized or scratched to cause poor contact is avoided.
The step that the test circuit board judges that if a feedback signal of a loop formed by the test probe and the golden finger of the test sample is received, after the condition that poor contact does not exist in the connection of the test probe and the golden finger of the test sample is determined, current signal data are collected and sent to the data processing unit comprises the following steps:
the Detection end of a main control chip U1 of the test circuit board is pulled down to GND through a diode D23, a first test probe, a first terminal of a golden finger, a second terminal of the golden finger, a second test probe, a common end of a relay K1, a normally closed end of the relay K1, a third test probe, a third terminal of the golden finger, a fourth terminal of the golden finger and a fourth test probe, and then if a pull-down signal is captured, the test probe and the golden finger of the test sample are judged to be in a good contact state;
the main control chip U1 enables the optocoupler isolation chip U8 to be closed by switching the level of the Switch end, the triode Q3 is conducted, one end, connected with a collector, of the relay K1 is pulled down to GND, the common end of the relay K1 is connected with the normally open end, and the second test probe is connected to the IN-end of the current measurement chip U5; the current flows from a power supply network VCC5 through the current sampling resistor R51 and the VCC end of the test sample circuit U3 contacted by the second test probe, and flows out from the GND end; the current measuring chip U5 collects current signal data and sends the current signal data to the data processing unit.
The color sensor collects brightness signal data of the RGB-LED lamp and sends the brightness signal data to the data processing unit, and the step of testing a test sample of the color backlight module of the notebook computer keyboard is completed, and the color backlight module testing device further comprises the following steps:
the color sensor is a high-precision color sensor, collected red, green and blue light brightness of the RGB-LED lamp is converted into 65536-level brightness signal data, the data are sent to the data processing unit, the data processing unit controls the servo push rod motor to drive the pressing platform to move upwards, the pneumatic sucker on the mechanical arm sucks up a test sample in the test sample placing groove and sends the test sample to the blanking conveyor belt device, and test on the test sample of the notebook computer keyboard color backlight module is completed. (the color sensor of this application is high accuracy color sensor, can quantify the red, green and blue light luminance of RGB-LED lamp into 65536 rank luminance signal data, can be accurate controlling the luminance value like this, guarantees that the whole of notebook computer keyboard color backlight unit shines the impression unanimously).
The method of the application relates to an automatic testing device of a color backlight module of a notebook computer keyboard, as shown in fig. 5, wherein the automatic testing device is arranged to be a desk structure, the desk structure comprises a testing device main body 2, and the testing device main body 2 is further provided with: the device comprises a feeding conveyor belt device 1, a high-speed camera support 3, a high-speed camera 4, a servo push rod motor support 5, a servo push rod motor 6, a pressing platform 7, a test probe (not shown in the figure), a pressing probe (not shown in the figure), a discharging conveyor belt device 8, a mechanical arm 9, a test sample (not shown in the figure) and a test circuit board (not shown in the figure); the servo push rod motor support 5 is arranged on the testing device main body 2 at a position close to the middle of the rear end, and the servo push rod motor 6 is arranged on the testing device main body 2 through the servo push rod motor support 5; the pressing platform 7 is arranged on a push rod of the servo push rod motor 6 and moves up and down along with the servo push rod motor 6; the mechanical arm 9 is arranged on the testing equipment main body 2 near the middle of the front end, and the pneumatic sucker is arranged on the mechanical arm 9 (the pneumatic sucker can suck a test sample and place the test sample in the test sample placing groove); the test circuit board is arranged in the test equipment main body, the color sensors are welded on the test circuit board, and the windowing distribution of the color sensors is arranged on the upper surface of the test equipment main body; the test sample is placed on the upper surface of the test device body 2 and the RGB-LED lamps of the test sample fall in the color sensor window; the pressing probe is arranged at a position, corresponding to the position right above the window of the color sensor, on the pressing platform 7, and when the pressing platform descends, the pressing probe presses the back position of the RGB-LED lamp of the test sample; the test probe is arranged at a position right above the golden finger 12 of the test sample on the pressing platform 7, and when the pressing platform 7 descends, the test probe presses the golden finger 12 of the test sample.
Fig. 6 is a schematic diagram showing a state where the push-down probe is about to be pushed down to the back surface of the RGB-LED lamp of the test sample when the push-down stage 7 is lowered. The test circuit board 203 inside the test apparatus main body 2 is shown, the color sensors 202 are soldered to the test circuit board 203, the color sensor windows 204 are distributed on the upper surface of the test apparatus main body 2, and the RGB-LED lamps of the test sample fall in the color sensor windows 204.
The specific operation flow of the automatic testing method for the color backlight module of the notebook computer keyboard is as follows: the feeding conveyor belt device conveys the test sample to the position below the high-speed camera, the high-speed camera scans the image of the test sample, the image data is transmitted to the data processing unit, the data processing unit analyzes whether the test sample has poor appearance and position data, and the data on the sample identification code on the test sample is recorded; the pneumatic sucker on the machine sucks the test sample from the conveying belt and places the test sample on the test sample placing groove on the test equipment main body through the position data analyzed by the data processing unit, and the mechanical arm resets. The servo push rod motor works, the pressing platform performs pressing operation, and the pressing probe on the pressing platform presses the back of the RGB-LED lamp on the test sample, so that the test sample generates micro-deformation; pressing the test probe to the gold finger of the test sample; if the contact between the test probe and the golden finger of the test sample is good, the Detection end of the main control chip U1 is pulled down to GND through a diode D23, a first test probe, a first terminal of the golden finger, a second test probe, a common end of a relay K1, a normally closed end of the relay K1, a third test probe, a third terminal of the golden finger, a fourth terminal of the golden finger and a fourth test probe, and the pull-down signal is captured by the main control chip U1; if any point in the test probe and the golden finger of the test sample is in poor contact, a loop is not formed, and the Detection of the main control chip U1 cannot be pulled down; after the contact test of the golden finger of the test sample is finished, the main control chip switches the level of the Switch end, the optical coupling isolation chip U8 is closed, the triode Q3 is conducted, so that one end, connected with the collector, of the relay K1 is pulled down to GND, the common end of the relay K1 is connected with the normally open end, and the second test probe is connected to the IN-end of the current measurement chip U5; the current flows from the power supply network VCC5 through the current sampling resistor R51 and the second test probe into the VCC end of the test sample circuit U3, and flows out from the GND end; the current measuring chip U5 collects current data and sends the current data to the data processing unit; the color sensor collects brightness signal data of the RGB-LED lamp and sends the brightness signal data to the data processing unit; after the detection is finished, the data processing unit binds, packages and uploads the current signal data, the golden finger contact test data, the brightness signal data, the appearance detection data and the sample identification code data to the cloud server; the data processing unit controls the servo push rod motor to drive the pressing platform to lift, the pneumatic sucker on the mechanical arm sucks up the test sample in the test sample placing groove and sends the test sample to the discharging conveying belt device, and a test cycle is completed.
In the present application, only the emphasis on each preferred embodiment is described to be different from other preferred embodiments, each preferred embodiment may be arbitrarily combined as long as there is no conflict, and the embodiments formed by combining are also within the scope disclosed in the present specification.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.
Claims (9)
1. An automatic testing method for a color backlight module of a notebook computer keyboard is characterized by comprising the following steps:
after the test sample is conveyed to the position below the high-speed camera by the feeding conveyor belt device, the high-speed camera scans the image of the test sample and transmits image data to the data processing unit; the data processing unit analyzes whether the test sample has a state of poor appearance and obtains position data of the test sample according to the received image data, and sends the position data of the test sample to the mechanical arm; the mechanical arm controls the pneumatic sucker to suck up the test sample of the color backlight module of the notebook computer keyboard and place the test sample on the upper surface of the test equipment main body according to the obtained position data of the test sample; the test equipment comprises a test equipment main body, a mechanical arm, a pneumatic sucker and a feeding conveyor belt device, wherein the test equipment main body is also provided with the feeding conveyor belt device, a high-speed camera support, a high-speed camera and a discharging conveyor belt device; the high-speed camera support is arranged at a position, close to the left side of the rear end, of the testing equipment main body, the high-speed camera is arranged on the high-speed camera support, and a lens of the high-speed camera is arranged at a position right above the feeding conveyor belt device;
a pneumatic sucking disc on the mechanical arm sucks up a test sample of the color backlight module of the notebook computer keyboard and places the test sample on the upper surface of the test equipment main body, and RGB-LED lamps of the test sample fall in the color sensor window; wherein, be provided with in the test equipment main part: the test device comprises a servo push rod motor, a mechanical arm, a pressing platform, a pressing probe, a test circuit board and a data processing unit, wherein the pressing platform is arranged on a push rod of the servo push rod motor and moves up and down along with the servo push rod motor; arranging a test circuit board and a data processing unit in a test equipment main body, welding color sensors on the test circuit board, and arranging the color sensors on the upper surface of the test equipment main body in a windowing manner; a pressing probe and a test probe are arranged on the pressing platform, and the pressing probe is arranged at a position, corresponding to the position right above the windowing of the color sensor, on the pressing platform; arranging a test probe at a position on the pressing platform, which corresponds to the position right above the gold finger of the test sample;
after the data processing unit controls the servo push rod motor to drive, the pressing platform descends, a pressing probe on the pressing platform presses down on the back of the RGB-LED lamp on the test sample, so that the test sample is slightly deformed, and meanwhile, the test probe on the pressing platform presses down on a golden finger of the test sample;
the test circuit board judges that if a feedback signal of a loop formed by the test probe and the golden finger of the test sample is received, current signal data are collected and sent to the data processing unit after the condition that poor contact does not exist in the connection of the test probe and the golden finger of the test sample is determined; the color sensor collects brightness signal data of the RGB-LED lamp and sends the brightness signal data to the data processing unit, and testing of a test sample of the notebook computer keyboard color backlight module is completed.
2. The automatic test method of claim 1,
further comprising: the upper surface of the testing equipment main body is provided with a testing sample placing groove, the shape of a groove for setting the testing sample placing groove is matched with the shape of a testing sample, the testing sample can be placed in the testing sample placing groove, a plurality of color sensor windows are arranged in the testing sample placing groove, and the shape and the position of each color sensor window are matched with the shape and the position of each RGB-LED lamp of the corresponding testing sample; the step that the arm is according to the position data of the test sample that obtains, control pneumatic sucking disc and suck up the test sample of the colored backlight unit of notebook computer keyboard and place the upper surface to the test equipment main part includes: and the mechanical arm controls the pneumatic sucker to suck up the test sample of the color backlight module of the notebook computer keyboard and place the test sample into the test sample placing groove on the upper surface of the test equipment main body according to the obtained position data of the test sample, wherein the RGB-LED lamp of the test sample is dropped into the color sensor window, and then the mechanical arm resets.
3. The automatic test method of claim 2,
further comprising: the testing sample of the color backlight module of the notebook computer keyboard is in a T shape, a golden finger is arranged at the end part of the vertical bar extending outwards, the golden finger comprises 4 terminals, a sample identity identification code is arranged on the vertical bar on the front side of the testing sample, and a plurality of RGB-LED lamps which are uniformly arranged are arranged on the horizontal bar on the back side of the testing sample;
the high-speed camera carries out image scanning to the test sample to after transmitting image data to data processing unit, still include: and the data processing unit records the data of the sample identification code on the test sample according to the received image data.
4. The automatic test method of claim 3,
further comprising: the test equipment main body is also provided with a servo push rod motor bracket, the servo push rod motor bracket is arranged on the test equipment main body and is close to the middle part of the rear end, and the servo push rod motor is arranged on the test equipment main body through the servo push rod motor bracket; the mechanical arm is arranged on the testing equipment main body and close to the middle part of the front end; and a wireless network access unit is also arranged in the test equipment main body.
5. The automatic test method of claim 4,
the test circuit board comprises a main control chip (U1), a current measurement chip (U5), an optical coupling isolation chip (U8), a relay (K1) and a test sample circuit (U3), wherein the current measurement chip (U5), the optical coupling isolation chip (U8), the relay (K1) and the test sample circuit (U3) are all connected with the main control chip (U1).
6. The automatic test method of claim 5,
further comprising: the testing probes comprise 4 testing probes, wherein the first testing probe is connected with the main control chip (U1), the second testing probe is connected with the common end of the relay (K1), the third testing probe is connected with the normally closed end of the relay (K1), and the fourth testing probe is grounded; the first terminal and the second terminal of the golden finger of the test sample are connected with a VCC end in the test sample circuit (U3), and the third terminal and the fourth terminal of the golden finger of the test sample are connected with a GND end in the test sample circuit (U3).
7. The automatic test method of claim 6,
the test probe is pressed down on a golden finger of the test sample, and the method further comprises the following steps: the first test probe presses down on the first terminal of the golden finger of the test sample, the second test probe presses down on the second terminal of the golden finger of the test sample, the third test probe presses down on the third terminal of the golden finger of the test sample, and the fourth test probe presses down on the fourth terminal of the golden finger of the test sample.
8. The automatic test method of claim 7,
the step that the test circuit board judges that if a feedback signal of a loop formed by the test probe and the golden finger of the test sample is received, after the condition that poor contact does not exist in the connection of the test probe and the golden finger of the test sample is determined, current signal data are collected and sent to the data processing unit comprises the following steps:
the Detection end of a main control chip (U1) of the test circuit board is pulled down to GND through a diode (D23), a first test probe, a first terminal of a golden finger, a second terminal of the golden finger, a second test probe, a common end of a relay (K1), a normally closed end of the relay (K1), a third test probe, a third terminal of the golden finger, a fourth terminal of the golden finger and a fourth test probe, and then if a pull-down signal is captured, the test probe and the golden finger of the test sample are judged to be in a good contact state;
the main control chip (U1) enables the optical coupling isolation chip (U8) to be closed by switching the level of the Switch end, the triode (Q3) is conducted, one end of the relay (K1) connected with the collector is pulled down to GND, the common end of the relay (K1) is connected with the normally open end, and the second test probe is connected to the IN-end of the current measurement chip (U5); the current flows from a power supply network (VCC 5) through a current sampling resistor (R51) and a VCC end of a test sample circuit (U3) contacted by a second test probe, and flows out from the GND end; the current measuring chip (U5) collects current signal data and sends the current signal data to the data processing unit.
9. The automatic test method of claim 8,
the color sensor collects brightness signal data of the RGB-LED lamp and sends the brightness signal data to the data processing unit, and the step of testing a test sample of the color backlight module of the notebook computer keyboard is completed, and the color backlight module testing device further comprises the following steps:
the color sensor is a high-precision color sensor, collected red, green and blue light brightness of the RGB-LED lamp is converted into 65536-order brightness signal data, the brightness signal data are sent to the data processing unit, the data processing unit controls the servo push rod motor to drive the pressing platform to move upwards, the pneumatic sucking disc on the mechanical arm sucks up a test sample in the test sample placing groove and sends the test sample to the blanking conveying belt device, and the test on the test sample of the color backlight module of the notebook computer keyboard is completed.
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