Multifunctional calibration device, product assembly line body and calibration method thereof

Abstract

The invention discloses a multifunctional calibration device, a product assembly line body and a calibration method thereof, and relates to the technical field of equipment detection and calibration, the multifunctional calibration device comprises a mounting seat, a calibration assembly and a circuit board assembly, the mounting seat is provided with an identification part, and the identification part can be identified by equipment on the product assembly line body; the calibration assembly comprises a plurality of calibration parts arranged on the mounting base at intervals, and the calibration parts are used for being matched with function ends of corresponding equipment on the product assembly line body; the circuit board assembly is arranged on the mounting seat, is electrically connected with the corresponding calibration part, and is in communication connection with a control device of the product assembly line body. Calibration of various devices is met through one device, and good universality and compatibility are achieved. Automatic calibration, automatic point inspection and automatic data collection can be achieved, unmanned operation is achieved, calibration time is saved, calibration and detection precision is improved, and the multifunctional calibration device directly depends on a conveying belt of a line body to conduct circulation and can be matched with the line body to achieve automatic operation.

Description

Technical Field

[0001] The present invention relates to the technical field of equipment detection and calibration, and in particular to a multifunctional calibration device, a product assembly line and a calibration method thereof. Background Art

[0002] The assembly process of electronic equipment involves spot welding, curing, testing and other links. In order to ensure product assembly accuracy and production stability, the equipment needs to be calibrated regularly to ensure the accuracy of processing parameters.

[0003] The existing calibration method is to manually check and confirm different devices using different handheld devices. However, there are problems with the manual inspection process being uncontrolled, and manual calibration is time-consuming. Summary of the Invention

[0004] The main purpose of the present invention is to propose a multifunctional calibration device, a product assembly line and a calibration method thereof, which can use one device to meet the calibration and detection requirements of multiple devices in the entire line, cooperate with the line flow to realize automatic detection of equipment, save calibration time and improve detection accuracy.

[0005] To achieve the above objectives, the present invention proposes a multifunctional calibration device that can be used on a product assembly line. The multifunctional calibration device includes:

[0006] A mounting base, wherein the mounting base is provided with an identification portion, and the identification portion can be identified by equipment on the product assembly line;

[0007] a calibration assembly comprising a plurality of calibration portions spaced apart from each other on the mounting base, the calibration portions being adapted to engage with functional ends of corresponding devices on a product assembly line; and

[0008] A circuit board assembly is provided on the mounting seat. The circuit board assembly is electrically connected to the corresponding calibration portion and is used for communication connection with the control device of the product assembly line.

[0009] In one embodiment, the plurality of calibration units include at least one of a pressure sensor, a light intensity sensor, a height jig, and a standard resistor.

[0010] In one embodiment, the plurality of calibration parts include a height jig, and the height jig includes a plurality of matching blocks. The plurality of matching blocks are arranged on the upper surface of the mounting seat at intervals along the horizontal direction, and the heights of the plurality of matching blocks are arranged in a stepped manner.

[0011] In one embodiment, the multifunctional calibration device further comprises a display screen and / or a power button and / or a communication interface disposed on the mounting base and electrically connected to the circuit board assembly; and / or,

[0012] The circuit board assembly further comprises a main board, and a wireless sending module and a wireless receiving module electrically connected with the main board.

[0013] In an embodiment, the mounting base comprises a base body and a cover body, an upper end surface of the base body is provided with a groove, and the cover body is arranged on the upper side of the groove and is provided with a plurality of openings;

[0014] Among the plurality of calibration parts, part of the calibration parts are arranged in the groove and partially exposed to the corresponding openings, and part of the calibration parts are arranged on the cover body.

[0015] The circuit board assembly is arranged in the groove.

[0016] The identification part is arranged on the base body and outside the groove.

[0017] The present application also provides a product assembly line body, the product assembly line body has a plurality of stations, and the product assembly line body comprises:

[0018] A plurality of devices are arranged at the plurality of stations, the plurality of devices are arranged in a horizontal direction, and the plurality of devices comprise processing devices for product assembly and detection devices for product detection.

[0019] A conveying device, a conveying path of the conveying device passes through the plurality of stations.

[0020] A multifunctional calibration device comprises a mounting base, a calibration assembly, and a circuit board assembly, the mounting base is provided with an identification part, the identification part can be identified by a device on a product assembly line body, the calibration assembly comprises a plurality of calibration parts arranged at intervals on the mounting base, the calibration parts are used to cooperate with functional ends of corresponding devices on the product assembly line body, the circuit board assembly is arranged on the mounting base, the circuit board assembly is electrically connected with the corresponding calibration parts and is used to be communicatively connected with a control device of the product assembly line body, the multifunctional calibration device can be driven by the conveying device to sequentially pass through the plurality of stations, and the plurality of calibration parts of the multifunctional calibration device are one-to-one corresponding to the plurality of devices.

[0021] A control device is electrically connected with the plurality of processing devices, the plurality of detection devices, and the multifunctional calibration device.

[0022] The present application also provides a calibration method of a product assembly line body, based on the product assembly line body, and the calibration method of the product assembly line body comprises the following steps:

[0023] Controlling the conveying device to drive the multifunctional calibration device to flow, and when one of the devices recognizes the recognition portion, controlling the device to enter a calibration mode and causing the multifunctional calibration device to stay at the corresponding workstation;

[0024] In the calibration mode, obtaining calibration reference data corresponding to the device;

[0025] If the calibration reference data meets the preset conditions, controlling the conveying device to drive the multifunctional calibration device to flow;

[0026] The calibration is completed after the multifunctional calibration device passes through all the equipment.

[0027] In one embodiment, after the step of obtaining calibration reference data of the corresponding device in the calibration mode, the step further includes:

[0028] If the calibration reference data does not meet the preset conditions, the multifunctional calibration device is kept at the corresponding workstation and an equipment abnormality instruction is issued.

[0029] In one embodiment, after the step of obtaining calibration reference data of the corresponding device in the calibration mode, the step further includes:

[0030] Comparing the calibration reference data with a preset condition to obtain a difference value;

[0031] If the calibration reference data does not meet the preset condition and the difference value does not exceed the preset difference value, controlling the corresponding device to perform compensation according to the difference value;

[0032] If the calibration reference data does not meet the preset conditions and the difference value exceeds the preset difference value, the multifunctional calibration device is kept at the corresponding workstation and an equipment abnormality instruction is issued.

[0033] In one embodiment, the step of obtaining calibration reference data of the corresponding device in the calibration mode includes:

[0034] In the calibration mode, controlling the movement of the corresponding functional end of the device and making the device cooperate with the corresponding calibration part in a preset working state;

[0035] The detection information output by the multifunctional calibration device or the detection information of the corresponding device is obtained as calibration reference data.

[0036] In the technical solution of the present invention, the mounting seat circulates on the line body, so that it can pass through multiple devices on the line body. When the device recognizes the identification part, it can trigger the calibration program of the device so that the functional end of the device can cooperate with the matching calibration part to realize the calibration of the device, so that the measured value and the standard value can be communicated by relying on the communication connection between the circuit board assembly and the line body control device, so as to determine whether the current device is operating according to the set parameters. The calibration of multiple devices can be met through one device, which has good versatility and compatibility. Automatic calibration, automatic inspection, and automatic data collection can be performed to realize unmanned operation, save calibration time, and improve calibration detection accuracy. The multifunctional calibration device directly relies on the conveyor belt of the line body itself to circulate, and can cooperate with the line body to realize automated operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0038] Figure 1 A schematic structural diagram of an embodiment of a multifunctional calibration device provided by the present invention;

[0039] Figure 2 for Figure 1 Schematic diagram of the structure of the middle seat;

[0040] Figure 3 A schematic flow chart of an embodiment of a method for calibrating a product assembly line provided by the present invention;

[0041] Figure 4 for Figure 3 A flowchart of a calibration method for a product assembly line;

[0042] Figure 5 This is a flowchart of another embodiment of the calibration method for a product assembly line provided by the present invention.

[0043] Description of Figure Numbers:

[0044] 100. Multifunctional calibration device; 1. Mounting base; 10. Identification unit; 11. Base; 111. Groove; 12. Cover; 2. Calibration assembly; 21. Pressure sensor; 22. Light intensity sensor; 23. Height jig; 24. Standard resistor; 3. Circuit board assembly; 31. Main board; 32. Wireless transmission module; 33. Conversion module; 4. Display screen.

[0045] The objectives, functional characteristics and advantages of the present application will be further described with reference to the embodiments in combination with the accompanying drawings. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work are within the protection scope of the present application.

[0047] It should be noted that if the directionality indication is involved in the embodiments of the present application, the directionality indication is only used to explain the relative position relationship, movement condition and the like between components in a certain posture, and if the certain posture is changed, the directionality indication is also changed accordingly.

[0048] In addition, if the description of “first”, “second” and the like is involved in the embodiments of the present application, the description of “first”, “second” and the like is only for the description purpose, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by “first”, “second” can explicitly or implicitly include at least one feature. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on that a person of ordinary skill in the art can realize, and when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is also not within the protection scope required by the present application.

[0049] During the assembly process of the electronic device, the processes such as spot welding, curing, detection and the like are involved. In order to ensure the product assembly precision and production stability, the device needs to be calibrated regularly to ensure the accuracy of the processing parameters. The existing calibration method is to check and confirm different devices by manually using different handheld devices, however, the manual detection may have the following problems:

[0050] The calibration time of manual calibration is long, for example, the welding pressure calibration, the time spent in single calibration can reach 2H;

[0051] The manual calibration may need to fill in the paper version of the point inspection table with the calibration results for many times, the process is not controlled, and there is a problem of actually not calibrated and privately filling in the parameters;

[0052] For the calibration method of multi-point measurement, there is a situation that the position selection is unreasonable, causing data anomaly.

[0053] Based on the above situation, the present invention provides a multifunctional calibration device, a product assembly line and a calibration method thereof, which integrate the calibration functions of multiple devices into one device. Through the circulation of the multifunctional calibration device in the line, it can cooperate with multiple devices in turn to realize detection and calibration. One device can meet the calibration and testing requirements of multiple devices in the entire line. It has good versatility and can realize automatic calibration and detection of equipment.

[0054] In the present invention, the product assembly line has multiple workstations, and the product assembly line includes multiple equipment, a conveying device, a multifunctional calibration device 100 and a control device. The multiple equipment are distributed at multiple workstations, and the multiple equipment are arranged at intervals in the horizontal direction. The multiple equipment include processing equipment for product assembly and detection settings for product detection; the conveying path of the conveying device passes through multiple workstations; the multifunctional calibration device 100 can pass through multiple workstations in sequence under the drive of the conveying device, and the multiple calibration parts of the multifunctional calibration device 100 are arranged one-to-one corresponding to the multiple equipment; the control device is electrically connected to the multiple processing equipment, the multiple detection settings and the multifunctional calibration device 100.

[0055] In the technical solution of the present invention, after the equipment is started, the processing parameters of each device are first set according to the processing requirements. The multifunctional calibration device 100 is first driven by the conveyor device to circulate at multiple stations, thereby cooperating with multiple devices to calibrate and test the set working parameters of the processing equipment and testing equipment. After the calibration of multiple devices is completed, the multifunctional calibration device 100 is removed, and the products to be assembled can be circulated at multiple stations driven by the conveyor device through the circulation tooling, thereby completing assembly and testing. The calibration of the equipment can be automatically performed with the help of the line body, without the need for manual inspection, and can be automated in conjunction with the processing program of the line body.

[0056] It should be noted that the arrangement of multiple workstations can be reasonably set according to space limitations. Multiple workstations can be arranged on the same plane in a straight line, L-shape, cross shape, or circular shape. Multiple workstations can also be arranged in an up-and-down direction based on the frame. A corresponding lifting mechanism can ensure the flow of multiple workstations at different heights. The present invention does not impose any restrictions on this.

[0057] The specific structure of the conveying device is not limited, as long as it can drive the corresponding tooling and equipment to flow. The conveying device can be in the form of a conveyor belt, a sprocket, or a combination of multiple rollers.

[0058] Please refer to Figures 1 to 2The multifunctional calibration device 100 includes a mounting base 1, a calibration component 2 and a circuit board component 3. The mounting base 1 is provided with an identification part 10, which can be identified by the equipment on the product assembly line; the calibration component 2 includes a plurality of calibration parts spaced apart on the mounting base 1, and the calibration parts are used to cooperate with the functional ends of the corresponding equipment on the product assembly line; the circuit board component 3 is provided on the mounting base 1, and the circuit board component 3 is electrically connected to the corresponding calibration part, and is used to communicate with the control device of the product assembly line.

[0059] In the technical solution of the present invention, the mounting base 1 circulates on the line body, so that it can pass through multiple devices on the line body. When the device recognizes the identification part 10, it can trigger the calibration program of the device so that the functional end of the device can cooperate with the matching calibration part to realize the calibration of the device, so that the measured value and the standard value can be communicated by relying on the communication connection between the circuit board assembly 3 and the line body control device, so as to determine whether the current device is operating according to the set parameters. The calibration of multiple devices is met by one device, which has good versatility and compatibility. Automatic calibration, automatic inspection, and automatic data collection can be performed to realize unmanned operation, save calibration time, and improve calibration detection accuracy. The multifunctional calibration device 100 directly relies on the conveyor belt of the line body itself to circulate, and can cooperate with the line body to realize automated operation.

[0060] It should be understood that the calibration unit can be configured in different configurations depending on the type of equipment. It can be a measuring tool capable of detecting a value, such as a sensor, or a testing fixture, such as a jig or gauge block, that provides indirect readings. Based on the calibration requirements for commonly used equipment in the electronic product manufacturing process, the multiple calibration units include at least one of a pressure sensor 21, an illumination sensor 22, a height jig 23, and a standard resistor 24.

[0061] Specifically, the present invention is not limited to the type of corresponding electronic products, and the following description will be made using an assembly line of a speaker as an example.

[0062] Based on the welding, curing and testing requirements of the speaker during assembly, multiple processing equipment includes welding machines, UV curing equipment, etc., and multiple testing equipment includes height detectors and resistance testers. Corresponding to these equipment, multiple calibration parts are set as pressure sensors 21, light intensity sensors 22, height jigs 23, and standard resistors 24. Multiple calibration parts are arranged at intervals in the horizontal direction without interfering with each other.

[0063] The pressure sensor 21 and the light intensity sensor 22 need to be electrically connected to the circuit board assembly 3. The pressure sensor 21 can contact the spot welding head of the welding machine, read the welding pressure value of the spot welding head, and compare the value with the working pressure value set by the welding machine to determine the accuracy of the equipment.

[0064] The light intensity sensor 22 can measure the light intensity of the UV curing device according to the set light requirements, thereby evaluating the accuracy of the device, avoiding the curing effect being affected by insufficient light intensity, and avoiding abnormal curing effect caused by excessive light intensity.

[0065] The height jig 23 and standard resistor 24 do not directly read their values, so they can be fixed to the mounting base 1 by means of adhesive or other means. The height jig 23 contacts the probe of the height detector, which can obtain the test value. The test value is compared with the standard value of the height jig 23 to confirm the device's test accuracy. The standard resistor 24 has two pads. The two probes of the resistance tester contact the two pads, forming a conductive circuit. The current passing through the two pads can confirm the test resistance value of the standard resistor 24. Comparing the test resistance value with the standard resistance value can confirm the device's test accuracy.

[0066] Specifically, standard values ​​for the height jig 23 and standard resistor 24 can be pre-stored in the circuit board assembly 3. The control device can obtain the test values ​​after the height detector and resistance tester are in contact with the height jig 23 and standard resistor 24. Data can be transmitted and compared via a communication connection, automatically determining whether the equipment is normal or has accuracy anomalies.

[0067] It should be noted that the resistance value of the standard resistor 24 is not limited and can be 6Ω, 8Ω, etc., and the height value of the height fixture 23 is not limited and can be 1mm, 3mm, or 5mm.

[0068] In the technical solution of the present invention, pressure sensor 21 and light intensity sensor 22 are connected to circuit board assembly 3 to achieve circuit continuity. The entire circuit is powered by a built-in lithium battery, and display screen 4 is an LCD screen that can display test values. Height and resistance measurements only provide a standard fixture and standard resistor 24. The circuit does not perform data processing. The device's own measuring device completes the data acquisition process. The data is transmitted to the identification unit 10 of the multifunctional calibration device 100 for identification, thereby confirming the current program to be executed, completing the switching of measurement programs and data determination.

[0069] Furthermore, the height jig 23 includes a plurality of mating blocks, which are arranged horizontally and spaced apart on the upper surface of the mounting base 1, and the heights of the plurality of mating blocks are arranged in a stepped manner. That is, the lower end surfaces of the plurality of mating blocks are flush, and the upper end surfaces are arranged in a stepped manner in the vertical direction. The probe of the height detector needs to contact and measure with multiple mating blocks at a time to obtain multiple measurement values. Only when all the multiple measurement values ​​are error-free can it be determined that the equipment accuracy meets the requirements. This can avoid the influence of external factors. Three tests are usually considered to be the most authoritative results. Therefore, the plurality of mating blocks are set to three. That is, the height jig 23 is stepped.

[0070] In addition, the multifunctional calibration device 100 further comprises a display screen 4 arranged on the mounting base 1 and electrically connected with the circuit board assembly 3, the display screen 4 can display numerical values, in order to facilitate the intuitive detection of the production line technician, the display screen 4 can not only display the numerical values detected by the sensor, but also can limit the actual detection value of the detection equipment through the communication connection.

[0071] In order to facilitate control, a power key can be arranged on the surface of the mounting base 1, so that the opening and closing of the device can be manually controlled, and correspondingly, the mounting base 1 should have a battery inside to meet the endurance requirements.

[0072] In order to facilitate the export of data and the import of programs, the mounting base 1 is provided with a communication interface.

[0073] The circuit board assembly 3 further comprises a main board 31 and a wireless sending module 32 and a wireless receiving module electrically connected with the main board 31, so as to transmit and receive data. The wireless receiving module can be an external structure or arranged inside the mounting base 1, which is not limited by the present application.

[0074] In addition, the circuit board assembly 3 further comprises a conversion module 33 for converting power and signals.

[0075] Considering the rational use of space, the identification part 10 is arranged on the side or upper edge of the mounting base 1. In order to adapt to the line body, the setting position of the identification part 10 should be similar to the position of the identification chip on the product flow tooling, so as to be identified by the equipment and avoid omission.

[0076] Please refer to Figure 1 and Figure 2 , the mounting base 1 comprises a seat body 11 and a cover body 12, the upper end surface of the seat body 11 is provided with a groove 111, the cover body 12 is arranged on the upper side of the groove 111, the cover body 12 is provided with a plurality of openings, among the plurality of calibration parts, part of the calibration parts are arranged in the groove 111 and partially exposed in the corresponding openings, part of the calibration parts are arranged on the cover body 12; the circuit board assembly 3 is arranged in the groove 111; the identification part 10 is arranged on the seat body 11 and outside the groove 111. The groove 111 plays a role of accommodation, which can facilitate the hiding of the electrical connection components and the main board 31, at the same time, the opening setting can ensure that the functional part of the calibration part is exposed. For example, the whole pressure sensor 21 is hidden in the groove 111, only the part in contact with the spot welding head is exposed at the opening. The height fixture 23 and the standard resistor 24 can be directly arranged on the cover body 12 and directly exposed to the outside.

[0077] The multifunctional calibration device 100 adopted by the present invention includes the measurement of pressure, light intensity, resistance, and height, realizing an integrated setting, which can meet the testing requirements of the entire line and can meet the line calibration of different products and different projects. It has good versatility and is equipped with a communication module to realize transmission with the line data end. The design of the identification part 10 has an anti-foolproof function.

[0078] Improved manual calibration efficiency: The original 3 hours of manual measurement time for a single project has been reduced to 0.5 hours using online measurement, significantly improving calibration efficiency. Production line experiments have confirmed an 83% increase in overall efficiency, a 5% reduction in single-line downtime, and reduced labor costs.

[0079] It should be noted that the control device can be an industrial computer. Specifically, the control device may include a processing device (such as a central processing unit, a graphics processing unit, etc.), which can perform various appropriate actions and processes according to programs stored in read-only memory (ROM) or programs loaded from a storage device into random access memory (RAM). The RAM also stores various programs and data required for the operation of the control device. The processing device, ROM, and RAM are interconnected via a bus. An input / output (I / O) interface is also connected to the bus. Typically, the following systems can be connected to the I / O interface: input devices such as a touch screen, touchpad, keyboard, mouse, image sensor, microphone, accelerometer, gyroscope, etc.; output devices such as a liquid crystal display (LCD), speaker, vibrator, etc.; storage devices such as magnetic tape, hard disk, etc.; and communication devices. The communication devices can allow the control device to communicate with other devices wirelessly or wired to exchange data. Although the figures illustrate a control device with various systems, it should be understood that implementation or inclusion of all the illustrated systems is not required. More or fewer systems may alternatively be implemented or included.

[0080] In one embodiment of the present invention, the main electronic components and their functions are as follows:

[0081] ESP32-WROOM-32E: main controller for data processing, display control, and wireless communication;

[0082] 8H8K64U: slave controller, specifically responsible for controlling AD7190 for high-precision data acquisition;

[0083] AD7190: 24-bit Σ-Δ ADC (analog-to-digital converter) for high-precision acquisition of sensor signals;

[0084] TP4056: lithium battery charging management chip;

[0085] 8205A: Dual MOSFETs (metal oxide semiconductor field effect transistors), used for battery protection circuits (overcharge, overdischarge, overcurrent);

[0086] IM319: Digital isolator (magnetic isolation), used to isolate digital signals between ADC (analog-to-digital converter) and MCU (microcontroller), improving anti-interference ability;

[0087] LLVB: LDO (Low Dropout Regulator) low voltage difference linear regulator, providing clean power for analog circuits;

[0088] UHFNA: high-frequency noise filter, used for power supply filtering;

[0089] WW2311: High-efficiency DC-DC step-down converter that reduces the lithium battery voltage to 3.3V or 5V;

[0090] AD8552: Zero-drift operational amplifier, used to amplify sensor signals;

[0091] LDFPB: ESD protection device, used for electrostatic protection of sensor interface;

[0092] SS34A: Schottky diode, used to prevent reverse connection of power supply;

[0093] VTGWA: Precision voltage reference source, providing high-precision reference voltage (e.g., 2.5V) for AD7190;

[0094] 2R2, 1R5: Power inductor for DC-DC converter;

[0095] MDS-2KG-GE: Miniature force sensor, used to collect pressure and convert it into analog output;

[0096] S2386-44K: Photodiode, used to convert UV light signals into electrical signals;

[0097] SDNT1608X103F3950FTF: Thermistor, used to measure the current temperature and compensate for the temperature drift of the photodiode.

[0098] The control system has two main control chips: ESP32-WROOM-32E and 8H8K64U. The 8H8K64U serves as the front-end data acquisition controller, controlling the AD7190 and reading high-precision ADC data, then sending this data to the ESP32 via the serial port. The ESP32, as the main controller, receives and processes data from the 8H8K64U and drives Display 4. It also has WiFi / BLE wireless transmission capabilities, enabling data exchange with the wireless receiving module.

[0099] Based on the above electronic components, the circuit is implemented as follows:

[0100] Power supply: The positive terminal of the lithium battery passes through an SS34A (for reverse polarity protection) and is then connected to the input of a TP4056 (with a large parallel capacitor filter). The TP4056 output is protected by an 8205A protection MOSFET. The battery voltage is then connected to the input of a WW2311 (step-down DC-DC converter), which outputs 3.3V (or 5V, depending on system requirements) to power the main system. Simultaneously, the 3.3V is passed through the LLVB to generate a cleaner 3.3V analog power supply (AVDD) for the analog sections of the AD8552 and AD7190. Charging is accomplished via a USB interface, with a corresponding charge status indicator (LED).

[0101] Pressure sensor circuit: Use the MDS-2KG-GE sensor to collect spot welding pressure and convert it into analog output; four-wire connection: V+: connected to AVDD (analog 3.3V after LDO); V-: connected to analog ground (AGND); S+ and S-: differential outputs, respectively connected to the two input terminals of the AD7190 (ESD protection through LDFPB).

[0102] UV sensor circuit: An S2386-44K photodiode is used to collect UV light intensity. The cathode (T1) is connected to the inverting input of the AD8552 (via an LDFPB), and the anode (S1) is connected to AGND. The AD8552 is configured as a transimpedance amplifier (TIA), with appropriate resistors connected to convert current into voltage. A resistor divider is also used to provide a bias voltage at the non-inverting input (this allows for a 1.65V output in the absence of light, with margin in both positive and negative directions). The output of the TIA is connected to another single-ended input channel of the AD7190. To ensure measurement accuracy, a thermistor (SDNT1608X103F3950FTF) is added to the circuit, forming a voltage divider: AVDD -> resistor -> thermistor -> AGND. The voltage divider point is connected to the third channel of the AD7190 for temperature compensation. This compensates for temperature variations on the sensor surface due to varying UV exposure times, resulting in more accurate measurement data.

[0103] ADC circuit: The AD7190 uses a precision 2.5V voltage reference provided by VTGWA. The AD7190's analog power supply is supplied by AVDD (LLVB output), and its digital power supply is supplied by the system's 3.3V (WW2311 output). The AD7190's SPI interface is connected to the 8H8K64U via the IM319 digital isolator (to isolate digital noise).

[0104] Control and Display: The 8H8K64U controls the AD7190 and reads the conversion results via the SPI interface (isolated via an IM319 digital isolator). The data is then sent to the ESP32 via the serial port (UART). The ESP32 processes the data (converting it into actual pressure and UV light intensity) and drives an LCD to display the actual values ​​via the I2C interface.

[0105] Taking spot welding pressure calibration as an example, the data transmission path is as follows:

[0106] The RFID (Radio Frequency Identification) installed by the PLC (Programmable Logic Controller) reads the identification unit 10 on the calibration device that has been transferred here. When it is recognized that the calibration procedure needs to be executed, the PLC controls the three-axis device in the welding equipment to complete the program switching. The three-axis device completes the action according to the set program, so that its spot welding head falls to the test position of the multi-functional calibration device 100 (MDS-2KG-GE sensor test position) and presses down to generate constant pressure. After a stabilization delay of 1S, the ESP32 inside the multi-functional calibration device 100 completes the data reading and sends it to the PLC wireless receiver through the wireless transmission module 32, and stores it in the PLC register A. After receiving the wireless data, the PLC completes the reading of the current value through the pressure device built into the three-axis device, and reads it into the PLC register B through RS485.

[0107] The value stored in PLC register A is compared with the reference value (basic value is 8N). When it exceeds ±2N, an alarm will be triggered to remind that the downward stroke is out of limit and the three-axis calibration position needs to be adjusted.

[0108] The PLC compares the difference between the data stored in register A and register B. When the difference exceeds ±0.5N-2N, an alarm will be issued to remind that the current value of the equipment pressure sensor 21 needs to be calibrated (the internal controller has a compensation mechanism).

[0109] Based on this, the embodiment of the present application provides a calibration method for a product assembly line. Figures 3 and 4 This is a flow chart of the first embodiment of the calibration method for the product assembly line of the present application.

[0110] In this embodiment, the calibration method of the product assembly line specifically includes the following steps:

[0111] Step S10, controlling the conveying device to drive the multifunctional calibration device 100 to flow, and when one of the devices recognizes the recognition part 10, controlling the device to enter the calibration mode and causing the multifunctional calibration device 100 to stay at the corresponding station;

[0112] It should be noted that, according to different production needs, not all devices need to be turned on and working. Therefore, although multiple devices are arranged in a fixed order along the conveying direction of the conveying device, during the flow of the multifunctional calibration device 100 along the conveying direction of the conveying device, the first device passing by may be in the turned-on state to perform information recognition of the identification unit 10, and the first device passing by may also be in a non-working state of shutdown or standby. At this time, even if the first device passing by automatically captures the identification unit 10, the device will not perform any action.

[0113] When one of the devices to be calibrated recognizes the identification unit 10, the device enters calibration mode. At this point, the relative positions of the device and the multifunctional calibration device 100 must be maintained to ensure coordination between the functional end of the device and the calibration unit. Therefore, the multifunctional calibration device 100 must remain at the corresponding workstation. It should be understood that the conveyor device can be paused, or a limiting structure can be provided to prevent the multifunctional calibration device 100 from continuing to move. It should be understood that to ensure stability during the processing or testing of the circulation tooling carrying the product, a lifting and limiting structure is provided on the line to separate the circulation tooling carrying the product from the conveyor device. The multifunctional calibration device 100 can also utilize this structure during the calibration process. That is, no adjustments are required for the entire line.

[0114] Step S20, in the calibration mode, obtaining calibration reference data of the corresponding device;

[0115] It should be noted that the correspondence between each device and each calibration part is pre-set. After the device enters the calibration mode, the device can confirm the corresponding calibration part on the multi-function calibration device 100, thereby confirming the exact position of the calibration part, and the functional end activity of the corresponding control device can obtain the calibration reference data.

[0116] Different devices have different processing parameters and, likewise, different corresponding calibration sections. Therefore, after entering the calibration mode, the activity paths of different devices are also different.

[0117] Step S30A: If the calibration reference data meets the preset conditions, the conveying device is controlled to drive the multifunctional calibration device 100 to flow;

[0118] It should be noted that the preset conditions of different equipment are different. For example, the preset condition of a welding machine should be a pressure value within a certain tolerance range, and the preset condition of a height detector should be a fixed value.

[0119] In step S40 , the multifunctional calibration device 100 completes calibration after passing through all devices.

[0120] It should be noted that after passing through a plurality of devices, the multifunctional calibration device 100 can flow out from the end of the conveying device, and among the plurality of devices, all devices can be calibrated, or part of the devices can be calibrated, but the flow path of the multifunctional calibration device 100 is consistent, and when passing through a device that does not need to be calibrated, it can stop.

[0121] The technical scheme of the present application realizes the calibration of a plurality of devices at multiple stations during the circulation of the multifunctional calibration device 100 through communication interaction between the multifunctional calibration device 100 and the control device of the wire body, and the entire process has high automation and high calibration accuracy, thereby reducing labor costs.

[0122] Further, step S20 further includes:

[0123] Step S21, in the calibration mode, the functional end of the corresponding device is controlled to move, and the device is caused to cooperate with the corresponding calibration part in the preset working state;

[0124] It should be noted that according to the type of the device and the structure of the calibration part, the functional end of the device and the calibration part may be in contact, or the functional end of the device and the calibration part may be close to each other.

[0125] For example, in the calibration mode, the functional end of the UV curing device is controlled to move so that the light emitting part thereof can be directly above the illuminance sensor 22 and close to the illuminance sensor 22, and the distance therebetween should be determined according to the detection range of the illuminance sensor 22.

[0126] For example, in the calibration mode, the spot welding head of the welding machine is controlled to move to contact the pressure sensor 21.

[0127] Step S22, the detection information output by the multifunctional calibration device 100 or the detection information of the corresponding device is obtained as calibration reference data.

[0128] It should be noted that if the calibration part obtains data information through measurement, the data information obtained by the calibration part is used as the calibration reference data, for example, when the calibration part has a determined size structure, the measurement value of the corresponding calibration device is used as the calibration reference data.

[0129] For example, the detection values of the pressure sensor 21 and the illuminance sensor 22 are used as the calibration reference data, and the measurement values of the height detector and the resistance tester are used as the calibration reference data.

[0130] Further, step S20 further includes:

[0131] Step S30B, if the calibration reference data does not meet the preset condition, the multifunctional calibration device 100 is kept at the corresponding station, and an equipment abnormality instruction is issued.

[0132] However, it should be understood that a buzzer or indicator light can be set on the equipment to alert the production line technician through an alarm or light after an equipment abnormality instruction is issued, and the production line technician can confirm the cause of the equipment abnormality and debug and maintain it.

[0133] The multifunctional calibration device 100 moves in one direction during the circulation process. Therefore, after confirming that the accuracy of one of the devices is abnormal, it is necessary to wait at the corresponding workstation and perform calibration test again after the device is debugged. The circulation will not continue until the device is calibrated and qualified.

[0134] In the second embodiment, please refer to Figure 5 , after step S20, further comprising:

[0135] Step S301, comparing the calibration reference data with the preset conditions to obtain a difference value;

[0136] For example, the pressure value P1 of the spot welding head detected by the pressure sensor 21 is used as calibration reference data, and the preset condition is the set welding pressure P of the spot welding head. The two are compared to obtain the difference value P1-P.

[0137] For example, the resistance tester detects and obtains the detection value R1 of the standard resistor 24 on the multifunctional calibration device 100 , and the preset condition is the actual value R of the standard resistor 24 . The two are compared to obtain the difference value R1 −R.

[0138] It should be understood that the difference value may be positive or negative.

[0139] Step S302A: If the calibration reference data does not meet the preset conditions and the difference value does not exceed the preset difference value, control the corresponding device to perform compensation according to the difference value;

[0140] It should be noted that the preset difference is reasonably formulated based on the tolerance range or fixed value in the preset conditions and the degree of impact on the equipment after compensation.

[0141] If the difference is positive and does not exceed the preset difference, the difference is used as the compensation value and debugged directly in the device program. For example, the difference value obtained by calibration of the height detector is P1-P=0.5N. After compensation, the actual detection value of the height detector is P+0.5N.

[0142] In step S302B, if the calibration reference data does not meet the preset conditions and the difference value exceeds the preset difference value, the multifunctional calibration device 100 is kept at the corresponding workstation and an equipment abnormality instruction is issued.

[0143] If the difference is too large, it means that the accuracy of the current equipment is quite different. In this case, it is necessary to remind the production line technician to confirm through equipment abnormality instructions and perform manual intervention through equipment debugging and maintenance.

[0144] Taking the calibration of the speaker assembly line as an example, the calibration process of the line is as follows:

[0145] A tool is driven by the conveyor belt of the conveyor device and flows into one of the workstations (for example: spot welding station, height measurement station, UV curing station, resistance testing station). The PLC scans the code to identify the identification part 10 of this tool, confirms it is a multi-function calibration device 100, obtains the tool number information from the identification part 10, and sends the server data with the tool number information as the index value.

[0146] The PLC sends a connection command to the wireless receiving module, which establishes a wireless connection with the wireless transmitting module 32 of the multifunctional calibration device 100. The multifunctional calibration device 100 is transferred to the automation equipment, and the automation equipment program is switched to calibration mode.

[0147] Pressure calibration: The automated equipment presses the spot welding head onto the force measuring point of the pressure sensor 21 (steering calibration) of the multifunctional calibration device 100 .

[0148] Light calibration: The automated equipment drives the UV curing device to the position of the light intensity sensor 22.

[0149] Height calibration: The automated equipment presses the height detector probe onto position 23 of the standard height fixture and measures three different fitting blocks in sequence.

[0150] Resistance calibration: The automated equipment moves the probe of the resistance tester to the position of the standard resistor 24 (6Ω) and presses it down to the pad position of the standard resistor 24.

[0151] The above measurement data is connected to the wireless receiving module through the wireless sending module 32. The wireless receiving module is connected to the PLC in network port mode through the communication interface position and transmitted to the PLC according to the standard communication protocol. The PLC uploads this value to the equipment inspection management system. The system compares the set value. When it exceeds the standard, it alarms and shuts down. When it passes the test, it will be measured at the next work station.

[0152] After the measurement is successful, the multifunctional calibration device 100 moves to the next station and sends a disconnect instruction to the receiver.

[0153] The calibration is carried out in sequence online to complete the calibration of the entire line, and the multifunctional calibration device 100 is discharged after the calibration of the last station is completed.

[0154] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's description and drawings, or direct / indirect applications in other related technical fields, within the scope of the present invention are included in the patent protection scope of the present invention.

Claims

1. A multifunctional calibration device capable of being circulated on a product assembly line, characterized in that: The multifunctional calibration device includes: A mounting base, wherein the mounting base is provided with an identification portion, and the identification portion can be identified by equipment on the product assembly line; a calibration assembly comprising a plurality of calibration portions spaced apart from each other on the mounting base, the calibration portions being adapted to engage with functional ends of corresponding devices on a product assembly line; and A circuit board assembly is provided on the mounting seat. The circuit board assembly is electrically connected to the corresponding calibration portion and is used for communication connection with the control device of the product assembly line.

2. The multifunctional calibration device according to claim 1, wherein: The plurality of calibration units include at least one of a pressure sensor, a light intensity sensor, a height jig, and a standard resistor.

3. The multifunctional calibration device according to claim 1, wherein: The plurality of calibration parts include a height jig, and the height jig includes a plurality of matching blocks. The plurality of matching blocks are arranged on the upper surface of the mounting seat at intervals along the horizontal direction, and the heights of the plurality of matching blocks are arranged in a stepped manner.

4. The multifunctional calibration device according to claim 1, wherein: The multifunctional calibration device further comprises a display screen and / or a power button and / or a communication interface provided on the mounting base and electrically connected to the circuit board assembly; and / or, The circuit board assembly further includes a mainboard, and a wireless transmitting module and a wireless receiving module electrically connected to the mainboard.

5. The multifunctional calibration device according to claim 1, wherein: The mounting base includes a base body and a cover body, the upper end surface of the base body is provided with a groove, the cover body is provided on the upper side of the groove, and the cover body is provided with a plurality of openings; Among the plurality of calibration parts, some of the calibration parts are arranged in the groove and partially exposed in the corresponding opening, and some of the calibration parts are arranged in the cover body; The circuit board assembly is arranged in the groove; The identification portion is arranged on the base and is located outside the groove.

6. A product assembly line, characterized in that: The product assembly line has multiple workstations, and the product assembly line includes: A plurality of devices are separately provided at the plurality of workstations, the plurality of devices are arranged at intervals in the horizontal direction, and the plurality of devices include processing equipment for product assembly and detection equipment for product testing; A conveying device, wherein a conveying path of the conveying device passes through a plurality of the workstations; The multifunctional calibration device according to any one of claims 1 to 5, capable of sequentially passing through a plurality of said workstations under the drive of said conveying device, wherein said plurality of said calibration parts of said multifunctional calibration device are provided in a one-to-one correspondence with said plurality of said devices; and A control device is electrically connected to the plurality of processing devices, the plurality of detection devices and the multifunctional calibration device.

7. A calibration method for a product assembly line, based on the product assembly line according to claim 6, characterized in that: The calibration method of the product assembly line includes the following steps: Controlling the conveying device to drive the multifunctional calibration device to flow, and when one of the devices recognizes the corresponding recognition part, controlling the device to enter a calibration mode and causing the multifunctional calibration device to stay at the corresponding workstation; In the calibration mode, obtaining calibration reference data corresponding to the device; If the calibration reference data meets the preset conditions, controlling the conveying device to drive the multifunctional calibration device to continue to flow; The calibration is completed after the multifunctional calibration device passes through all the equipment.

8. The method for calibrating a product assembly line according to claim 7, wherein: After the step of obtaining calibration reference data of the corresponding device in the calibration mode, the step further includes: If the calibration reference data does not meet the preset conditions, the multifunctional calibration device is kept at the corresponding workstation and an equipment abnormality instruction is issued.

9. The method for calibrating a product assembly line according to claim 7, wherein: After the step of obtaining calibration reference data of the corresponding device in the calibration mode, the step further includes: Comparing the calibration reference data with a preset condition to obtain a difference value; If the calibration reference data does not meet the preset condition and the difference value does not exceed the preset difference value, controlling the corresponding device to perform compensation according to the difference value; If the calibration reference data does not meet the preset conditions and the difference value exceeds the preset difference value, the multifunctional calibration device is kept at the corresponding workstation and an equipment abnormality instruction is issued.

10. The method for calibrating a product assembly line according to claim 7, wherein: In the calibration mode, the step of obtaining calibration reference data of the corresponding device includes: In the calibration mode, controlling the movement of the corresponding functional end of the device and making the device cooperate with the corresponding calibration part in a preset working state; The detection information output by the multifunctional calibration device or the detection information of the corresponding device is obtained as calibration reference data.

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