Optical part detection tool and use method thereof

Abstract

The invention relates to the technical field of automobile part detection, and discloses an optical part detection tool and a use method thereof.The optical part detection tool comprises a driving control module and a general white light detection module, the general white light detection module comprises a rectangular PCB, the rectangular PCB is provided with a plurality of light emitting units, and the light emitting units are connected with the driving control module. The input end of the driving control module is electrically connected with an external power supply, a plurality of electrified wire groups which are connected and combined in parallel and can work independently extend out of the output end of the driving control module, plugs are arranged at the tail ends of the electrified wire groups, and terminal seats matched with the plugs are arranged on the light-emitting units. Through cooperative arrangement of the mechanical switch module and the general white light detection module, the required brightness switching effect of changing red light into white light is realized under the condition of no additional wiring harness, universality is achieved, a specially-made PCBA module is not needed, and the situation that the performance of a PCBA cannot be guaranteed after LEDs are replaced due to the difference of polarity and technical parameters of red light LEDs and white light LEDs is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts detection, in particular to an optical parts detection tool and a use method thereof. Background Art

[0002] At present, the light guides, surfaces and similar optical parts used for automobile rear position lights or brake lights on the market usually need to be lit up to test the quality of the parts by simulating the lighting of the entire lamp. Since the color of the position lights and brake lights are both red, if the original PCBA module is used to make tooling for testing, the parts will be lit with red light during use, making it difficult for workers to determine the location of defects such as defects and flaws, which can easily lead to misjudgment. Therefore, the existing technology has made special PCBA modules, such as Figure 1 As shown, the red light LED of the corresponding optical component is replaced with a white light LED. White light can solve the problem that the defects of the components are not easy to see under red light, and can alleviate the adverse effects of red light on the eyes. However, this circuit is designed according to the characteristics of red light LEDs, and red light and white light LEDs differ in polarity and technical parameters. After replacing the LED, the performance of the PCBA cannot be guaranteed, resulting in easy damage to the module. Summary of the invention

[0003] In view of the deficiencies in the prior art, the technical solution adopted by the present invention to solve the technical problems is: an optical parts detection tooling, including a drive control module and a universal white light detection module, the universal white light detection module including a rectangular PCB circuit board, a plurality of light-emitting units being arranged on the rectangular PCB circuit board, the input end of the drive control module being electrically connected to an external power supply, and a plurality of power-carrying wire groups which are connected and combined in parallel and can work independently of each other are extended from the output end, a plug is arranged at the end of the power-carrying wire group, and a terminal seat which is compatible with the plug is arranged on the light-emitting unit.

[0004] Preferably, the light emitting unit comprises a white light LED and a matching resistor arranged in series.

[0005] Preferably, the drive control module comprises a PLC controller and a drive circuit, and the drive circuit is connected to the controller and is controlled in a PWM manner.

[0006] Preferably, the light emitting unit further comprises a solenoid valve connected to the driving circuit for controlling the on and off of the white light LED.

[0007] Preferably, the drive control module further comprises one or more solid-state relays respectively connected to the drive circuit and a plurality of solenoid valves, and the drive circuit controls the opening and closing of the solenoid valves by controlling the solid-state relays.

[0008] Preferably, a BOOST / PFC circuit and a DC / DC voltage regulating circuit are provided between the external power supply and the drive control module, the output end of the external power supply input interface is connected to the input end of the BOOST / PFC circuit, the output end of the BOOST / PFC circuit is connected to the input end of the DC / DC voltage regulating circuit, and the output end of the DC / DC voltage regulating circuit is connected to the input end of the drive control module.

[0009] Preferably, the BOOST / PFC circuit includes a DC source, an energy storage inductor L, a MOS tube, a diode VD and a filter capacitor C, the first end of the energy storage inductor L is connected to the positive electrode of the DC source, the second end is respectively connected to the source electrode of the MOS tube and the positive electrode of the diode VD, the negative electrode of the diode VD is connected to the first end of the filter capacitor C, and the second end of the filter capacitor C and the drain electrode of the MOS tube are both connected to the negative electrode of the DC source.

[0010] Preferably, the DC / DC voltage regulating circuit comprises a filter inductor and a plurality of half-bridge circuits or full-bridge circuits.

[0011] Preferably, it further comprises a tooling base, the tooling base having a plane for connecting a rectangular PCB circuit board, screw holes are reserved on the rectangular PCB circuit board, and connecting holes matching with the screw holes are opened on the plane.

[0012] The present invention also discloses a method for using an optical parts detection tool, comprising the following steps:

[0013] S1. Place the optical parts to be tested in the test area, connect the positive and negative electrodes of the external power supply to the module, and provide a stable DC output voltage for the drive control module through the BOOST / PFC circuit and DC / DC voltage regulation circuit;

[0014] S2, the PLC controller collects the set values ​​of each solenoid valve, that is, the input frequency and duty cycle. After obtaining the data, the PLC calculates the corresponding time value and opens the corresponding solenoid valve in sequence according to the generated PWM wave, thereby controlling the working quantity of the light-emitting unit;

[0015] S3. After the light-emitting unit is powered on, the white light LED illuminates the optical part to be inspected.

[0016] The beneficial effects of the present invention are as follows:

[0017] By coordinating the mechanical switch module with the universal white light detection module, the required brightness switching effect from red light to white light can be achieved without additional wiring harnesses. It is universal and does not require a special PCBA module. It only needs a conventional power supply to work. It avoids the performance of the PCBA after replacing the LED due to differences in polarity and technical parameters between red and white LEDs. At the same time, it also simplifies the composition of the detection tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a scheme structure diagram of the prior art;

[0019] Figure 2 It is a scheme structure diagram of the present invention;

[0020] Figure 3 is a structural diagram of a universal white light detection module in the present invention;

[0021] Figure 4 It is a driving circuit diagram of the present invention;

[0022] Figure 5 is the BOOST / PFC circuit diagram of the present invention;

[0023] Figure 6 This is a DC / DC voltage regulation circuit diagram of the present invention.

[0024] In the figure: 1. Rectangular PCB circuit board; 2. Light-emitting unit; 3. Tooling base. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0026] like Figure 2-3 As shown, an optical parts detection tooling is mainly composed of a drive control module, a universal white light detection module and a tooling base 3, wherein the universal white light detection module includes a rectangular PCB circuit board 1, and the rectangular PCB circuit board 1 is a single-sided FR4 board, which has a low cost and is easy to produce; double-sided FR4 boards, aluminum substrates, FPC soft boards and other boards can also be considered, but the cost and production difficulty will be increased, and a plurality of light-emitting units 2 are provided on the rectangular PCB circuit board 1, the input end of the drive control module is electrically connected to an external power supply, and a plurality of energized wire groups that can work independently of each other and are connected and combined in parallel are extended from the output end, a plug is provided at the end of the energized wire group, and a terminal seat compatible with the plug is provided on the light-emitting unit 2; the tooling base 3 has a plane for connecting the rectangular PCB circuit board 1, screw holes are reserved on the rectangular PCB circuit board 1, and connecting holes matching the screw holes are opened on the plane.

[0027] Taking into account the shape requirements of the light guide and related optical parts (such as differences in length, angle, and width), the driving control module can freely adjust the number of light-emitting units 2. The module includes a PLC controller and a driving circuit. The driving circuit is connected to the controller and is controlled by PWM. The light-emitting unit 2 includes a white light LED arranged in series, a matching resistor, and a solenoid valve connected to the driving circuit for controlling the opening and closing of the white light LED. Because each light-emitting unit 2 is an independent circuit, such as Figure 4 As shown, the drive circuit is controlled by PWM mode, which is combined with the solenoid valve. The user can control the working number of the light-emitting unit 2 by adjusting the frequency and duty cycle as needed; if one of the light-emitting units 2 is damaged, any employee can complete the replacement in a short time, and the design engineer is no longer required to make special PCBA in advance, which improves the maintainability of the detection tooling, reduces the workload of related personnel, and saves time and resources.

[0028] To ensure that the driving current of the solenoid valve is sufficient, one or more solid-state relays can be added between the driving circuit and several solenoid valves, which are respectively connected to multiple solenoid valves and the driving circuit. The driving circuit controls the opening and closing of the solenoid valve by controlling the opening and closing of the solid-state relays.

[0029] like Figure 5-6 As shown, a BOOST / PFC circuit and a DC / DC voltage regulating circuit are provided between the external power supply and the drive control module, the output end of the external power supply input interface is connected to the input end of the BOOST / PFC circuit, the output end of the BOOST / PFC circuit is connected to the input end of the DC / DC voltage regulating circuit, and the output end of the DC / DC voltage regulating circuit is connected to the input end of the drive control module; the BOOST / PFC circuit includes a DC source, an energy storage inductor L, a MOS tube, a diode VD and a filter capacitor C, the first end of the energy storage inductor L is connected to the positive electrode of the DC source, the second end is respectively connected to the source electrode of the MOS tube and the positive electrode of the diode VD, the negative electrode of the diode VD is connected to the first end of the filter capacitor C, and the second end of the filter capacitor C and the drain electrode of the MOS tube are both connected to the negative electrode of the DC source; when the MOS tube is in the on state, the DC input voltage charges the energy storage inductor L, and the diode VD is cut off due to reverse bias. During this period, energy is stored in the energy storage inductor in the form of magnetic energy. L, and the voltage on the filter capacitor C supplies power to the DC / DC voltage regulation circuit; when the MOS tube is in the cut-off state, the diode VD is forward-conducted, the voltage polarity of the two ends of the energy storage inductor L is reversed, and the energy stored during the conduction is transmitted to the filter capacitor C and the DC / DC voltage regulation circuit. In order to achieve dynamic balance, the energy stored in the energy storage inductor L during the conduction period of the MOS tube in one cycle should be equal to the energy released by the energy storage inductor L during the cut-off period, so as to provide a stable DC output voltage; the DC / DC voltage regulation circuit is a multi-level step-down Buck circuit, which includes a filter inductor and two sets of half-bridge circuits, the midpoint of the bridge arm of the half-bridge circuit is connected to the output capacitor of the DC / DC voltage regulation circuit through the filter inductor, and the output voltage is borne by the output capacitor, and the output end of the half-bridge circuit is connected to the input end of the drive control module, and the power tube type can be MOSFET, IGBT, HEMT, IGCT, GTO, GTR, thyristor or diode.

[0030] A method for using an optical parts inspection tool comprises the following steps:

[0031] S1. Place the optical parts to be tested in the test area, connect the positive and negative electrodes of the external power supply to the module, and provide a stable DC output voltage for the drive control module through the BOOST / PFC circuit and DC / DC voltage regulation circuit;

[0032] S2, the PLC controller collects the set values ​​of each solenoid valve, that is, the input frequency and duty cycle. After obtaining the data, the PLC calculates the corresponding time value and opens the corresponding solenoid valve in sequence according to the generated PWM wave, thereby controlling the working quantity of the light-emitting unit 2;

[0033] S3. After the light-emitting unit 2 is powered on, the white light LED illuminates the optical part to be inspected.

[0034] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. An optical parts inspection tool, characterized in that: The invention comprises a driving control module and a universal white light detection module, wherein the universal white light detection module comprises a rectangular PCB circuit board (1), wherein a plurality of light-emitting units (2) are arranged on the rectangular PCB circuit board (1), wherein an input end of the driving control module is electrically connected to an external power supply, and an output end extends a plurality of power-carrying wire groups which are connected and combined in parallel and can work independently of each other, wherein a plug is arranged at the end of the power-carrying wire group, and a terminal seat which is compatible with the plug is arranged on the light-emitting unit (2).

2. The optical parts inspection tool according to claim 1, characterized in that: The light-emitting unit (2) comprises a white light LED and a matching resistor which are arranged in series.

3. The optical parts inspection tool according to claim 2, characterized in that: The drive control module includes a PLC controller and a drive circuit. The drive circuit is connected to the controller and is controlled in a PWM manner.

4. The optical parts inspection tool according to claim 3, characterized in that: The light-emitting unit (2) also includes a solenoid valve connected to the drive circuit and used for controlling the on and off of the white light LED.

5. The optical parts inspection tool according to claim 4, characterized in that: The drive control module further includes one or more solid-state relays respectively connected to the drive circuit and a plurality of electromagnetic valves. The drive circuit controls the opening and closing of the electromagnetic valves by controlling the solid-state relays.

6. The optical parts inspection tool according to claim 1, characterized in that: A BOOST / PFC circuit and a DC / DC voltage regulating circuit are provided between the external power supply and the drive control module, the output end of the external power input interface is connected to the input end of the BOOST / PFC circuit, the output end of the BOOST / PFC circuit is connected to the input end of the DC / DC voltage regulating circuit, and the output end of the DC / DC voltage regulating circuit is connected to the input end of the drive control module.

7. The optical parts inspection tool according to claim 6, characterized in that: The BOOST / PFC circuit includes a DC source, an energy storage inductor L, a MOS tube, a diode VD and a filter capacitor C. The first end of the energy storage inductor L is connected to the positive electrode of the DC source, and the second end is respectively connected to the source electrode of the MOS tube and the positive electrode of the diode VD. The negative electrode of the diode VD is connected to the first end of the filter capacitor C, and the second end of the filter capacitor C and the drain electrode of the MOS tube are both connected to the negative electrode of the DC source.

8. The optical parts inspection tool according to claim 7, characterized in that: The DC / DC voltage regulating circuit comprises a filter inductor and a plurality of groups of half-bridge circuits or full-bridge circuits.

9. The optical parts inspection tool according to claim 1, characterized in that: It also comprises a tooling base (3), wherein the tooling base (3) has a plane for connecting to a rectangular PCB circuit board (1), screw holes are reserved on the rectangular PCB circuit board (1), and connecting holes matching the screw holes are opened on the plane.

10. A method for using the optical parts inspection tool according to claim 1, characterized in that: The following steps are involved: S1. Place the optical parts to be tested in the test area, connect the positive and negative electrodes of the external power supply to the module, and provide a stable DC output voltage for the drive control module through the BOOST / PFC circuit and DC / DC voltage regulation circuit; S2, the PLC controller collects the set values ​​of each solenoid valve, that is, the input frequency and duty cycle. After obtaining the data, the PLC calculates the corresponding time value and opens the corresponding solenoid valve in a timely manner according to the generated PWM wave, thereby controlling the working quantity of the light-emitting unit (2); S3. After the light-emitting unit (2) is powered on, the white light LED illuminates the optical part to be inspected.

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