Wave soldering jig use frequency management system

Abstract

The utility model discloses a wave soldering jig use frequency management system which comprises a master control module, an LCD display module, an indicator light alarm module, a temperature measuring circuit and a button circuit, the master control module comprises a master control chip, the input end of the LCD display module and the input end of the indicator light alarm module are both connected with the output end of the master control chip, and the button circuit is connected with the master control chip. The output ends of the temperature measuring circuit and the button circuit are connected with the input end of the main control chip. According to the utility model, on one hand, the use times of the wave-soldering jig can be counted through the temperature measuring circuit and the main control module, and the jig is prompted to be replaced in time through the indicator light alarm module, so that the use reliability of the wave-soldering jig can be improved, and risks and potential quality problems in the production process are reduced; on the other hand, all modules of the system are integrated on one circuit board, and the system is simple in overall structure, low in cost, exquisite, small and convenient to carry. The tool can be widely applied to the technical field of tool maintenance.

Description

Technical Field

[0001] The utility model relates to the technical field of fixture maintenance, in particular to a wave soldering fixture use times management system. Background Art

[0002] Wave soldering refers to the process of jetting molten solder into a solder wave as required by the design through an electric pump or electromagnetic pump, so that the printed circuit board pre-installed with components passes through the solder wave to achieve the mechanical and electrical connection between the solder end or pin of the component and the pad of the printed circuit board. The main material is solder bar. Wave soldering fixture is a new type of PCB fixture for patch technology processing, which is suitable for various PCB boards with patch components on the solder surface of the plug-in material. Traditional wave soldering fixtures usually judge whether their reliability has dropped to the unusable range by observing the degree of wear and damage on their surface or manually recording the number of times they are used. However, this method has certain limitations, because the reliability of the fixture does not only depend on the degree of damage on its appearance. In fact, even if the surface of the fixture is intact, its internal structure may have fatigued or damaged, resulting in instability or failure during use, and manual records will inevitably have errors. Therefore, traditional methods often lead to some fixtures with poor reliability being misjudged as usable, and increase labor costs, resulting in an increase in defective soldered PCBs, increasing risks and potential quality problems in the production process. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a wave soldering fixture usage times management system, which can improve the reliability of the use of the wave soldering fixture.

[0004] The technical solution adopted by the utility model is:

[0005] A wave soldering fixture usage times management system comprises a main control module, an LCD display module, an indicator light alarm module, a temperature measurement circuit and a button circuit, wherein the main control module comprises a main control chip, the input ends of the LCD display module and the indicator light alarm module are both connected to the output end of the main control chip, and the output ends of the temperature measurement circuit and the button circuit are both connected to the input end of the main control chip.

[0006] Further, the LCD display module includes an LCD display screen and an LCD driving circuit, the LCD driving circuit includes an LCD driver, a first resistor, a second resistor, a third resistor, a fourth resistor and a seventeenth resistor, the LCD display screen is connected to the LCD driver, the LCD driver is connected to the main control chip, one end of the first resistor, the second resistor, the third resistor and the fourth resistor are all connected to the LCD driver, the other ends of the first resistor, the second resistor, the third resistor and the fourth resistor are connected to the first power input terminal, one ends of the first resistor, the second resistor and the third resistor are also connected to the main control chip, one end of the seventeenth resistor is connected to the first power input terminal, and the other end of the seventeenth resistor is connected to the second power input terminal.

[0007] Further, the temperature measurement circuit includes a fifth resistor and a sixth resistor, both ends of the fifth resistor are connected to the main control chip, the main control chip and the fifth resistor are both connected to one end of the sixth resistor, and the other end of the sixth resistor is grounded.

[0008] Furthermore, the indicator light alarm module includes a system operation indication circuit, a usage count alarm circuit and a low power alarm circuit, the system operation indication circuit includes a first transistor and a seventh resistor, the positive electrode of the first transistor is connected to the main control chip through the seventh resistor, and the negative electrode of the first transistor is grounded, the usage count alarm circuit includes a second transistor and a ninth resistor, the positive electrode of the second transistor is connected to the main control chip through the ninth resistor, and the negative electrode of the second transistor is grounded, the low power alarm circuit includes a third transistor and a tenth resistor, the positive electrode of the third transistor is connected to the main control chip through the tenth resistor, and the negative electrode of the third transistor is grounded.

[0009] Furthermore, the button circuit includes a second button and a sixteenth resistor, one end of the second button is connected to the main control chip through the sixteenth resistor, and the other end of the second button is grounded.

[0010] Furthermore, the wave soldering jig usage management system also includes a data storage circuit, which includes a memory, a ninth capacitor, an eighteenth resistor and a nineteenth resistor. The first pin, the second pin, the third pin, the fourth pin and the seventh pin of the memory are all grounded, the fifth pin and the sixth pin of the memory are both connected to the main control chip, the fifth pin of the memory is also grounded through the eighteenth resistor and the ninth capacitor, the sixth pin of the memory is also grounded through the nineteenth resistor and the ninth capacitor, the eighth pin of the memory is connected to the second power input terminal, and the second power input terminal is also connected between the eighteenth resistor and the nineteenth resistor and the ninth capacitor.

[0011] Furthermore, the wave soldering jig usage management system also includes a reset circuit, which includes a first button, a third capacitor and a fourteenth resistor, one end of the fourteenth resistor is connected to the second power input terminal, the other end of the fourteenth resistor is grounded through the third capacitor, the main control chip is connected between the fourteenth resistor and the third capacitor, and one end of the first button is also connected between the fourteenth resistor and the third capacitor, and the other end of the first button is grounded.

[0012] Furthermore, the wave soldering fixture usage times management system also includes a power module, and the power module is connected to the main control chip.

[0013] Furthermore, the wave soldering fixture usage times management system also includes a debugging interface module and a serial communication module, and both the debugging interface module and the serial communication module are connected to the main control chip.

[0014] Furthermore, the main control module also includes a crystal oscillator module and a filter module, and both the crystal oscillator module and the filter module are connected to the main control chip.

[0015] The beneficial effects of the utility model are as follows: it includes a main control module, an LCD display module, an indicator light alarm module, a temperature measurement circuit and a button circuit. The main control module includes a main control chip. The temperature measurement circuit collects the current ambient temperature signal in the wave soldering fixture furnace, and then the main control chip determines whether the wave soldering fixture is used according to the collected current temperature signal, and records the number of uses. The button circuit displays the statistical number of uses on the LCD display module. When the number of uses exceeds the preset threshold, the indicator light alarm module sends an alarm signal to prompt the staff to replace the wave soldering fixture in time. The system can realize the statistics of the number of times the wave soldering fixture is used, and judge whether the wave soldering fixture has reached its service life by the number of uses, which can improve the reliability of the use of the wave soldering fixture and reduce the risks and potential quality problems in the production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A structural block diagram of a wave soldering fixture usage times management system provided by the utility model;

[0017] Figure 2 A circuit schematic diagram of an LCD driving circuit provided by the utility model;

[0018] Figure 3 A circuit schematic diagram of a temperature measurement circuit provided by the utility model;

[0019] FIG4( a) is a circuit schematic diagram of a system operation indication circuit provided by the present invention;

[0020] FIG4( b ) is a circuit schematic diagram of the usage frequency alarm circuit provided by the present invention;

[0021] FIG4( c ) is a circuit schematic diagram of a low battery alarm circuit provided by the present invention;

[0022] Figure 5 A circuit schematic diagram of a button circuit provided by the utility model;

[0023] Figure 6 A circuit schematic diagram of a data storage circuit provided by the utility model;

[0024] Figure 7 A circuit schematic diagram of a reset circuit provided by the utility model;

[0025] Figure 8 A circuit schematic diagram of the power interface circuit provided by the utility model;

[0026] Fig. 9 A circuit schematic diagram of the debugging interface module provided by the utility model;

[0027] Fig.10 A circuit schematic diagram of the serial communication module provided by the utility model;

[0028] Fig.11 The circuit schematic diagram of the main control chip and crystal oscillator module provided by the utility model;

[0029] Fig.12 A circuit schematic diagram of the filter module provided by the utility model;

[0030] Fig.13 The utility model provides a general circuit schematic diagram of a wave soldering fixture usage times management system;

[0031] Fig.14 The utility model provides a temperature curve diagram of the wave soldering fixture furnace.

[0032] Reference numerals: U1, LCD driver; U2, LCD display screen; U3, main control chip; R1-R20, first to twentieth resistors; D1-D4, first to fourth transistors; C1-C9, first to ninth capacitors; S1-S2, first to second buttons;

[0033] X1, crystal resonator; J1, debugging interface; J2, serial communication interface; J3, power interface; LCD_VCC, first power input terminal; VCC, second power input terminal; GND, ground wire. DETAILED DESCRIPTION

[0034] Wave soldering refers to the process of jetting molten solder into a solder wave as required by the design through an electric pump or electromagnetic pump, so that the printed circuit board pre-installed with components passes through the solder wave to achieve the mechanical and electrical connection between the solder end or pin of the component and the pad of the printed circuit board. The main material is solder bar. Wave soldering fixture is a new type of PCB fixture for patch technology processing, suitable for various PCB boards with patch components on the solder surface of the plug-in material. It has the following functions: 1. Support thin substrates or flexible circuit boards; 2. Prevent the substrate from bending during reflow; 3. Wave soldering has the ability to continue to maintain its physical properties in an environment with gradually rising temperatures; 4. It will not cause the artificial stone base to separate even in a harsh environment of being placed at 360℃ for a short time and continuously at an operating temperature of 300℃. Traditional wave soldering fixtures usually judge whether their reliability has dropped to an unusable range by observing the degree of wear and damage on their surface or manually recording the number of times they are used. However, this method has certain limitations, because the reliability of the fixture does not only depend on the degree of damage on its appearance. In fact, even if the surface of the fixture is intact, its internal structure may have been fatigued or damaged, causing instability or failure during use, and human records will inevitably have errors. Therefore, traditional methods often lead to some fixtures with poor reliability being misjudged as usable, and increase labor costs, resulting in an increase in defective soldered PCBs, increasing risks and potential quality problems in the production process.

[0035] To this end, the utility model embodiment proposes a wave soldering jig usage management system, including a main control module, an LCD display module, an indicator light alarm module, a temperature measurement circuit and a button circuit. The main control module includes a main control chip, which collects the current ambient temperature signal in the wave soldering jig furnace through the temperature measurement circuit, and then determines whether the wave soldering jig is used according to the collected current temperature signal through the main control chip, and records the number of uses. The number of uses is displayed on the LCD display module through the button circuit. When the number of uses exceeds the preset threshold, the indicator light alarm module sends an alarm signal to prompt the staff to replace the wave soldering jig in time. This system can realize the statistics of the number of times the wave soldering jig is used, and judge whether the wave soldering jig has reached its service life through the number of uses, which can improve the reliability of the use of the wave soldering jig and reduce the risks and potential quality problems in the production process.

[0036] Reference Figure 1 , Figure 1 The present invention is a structural block diagram of a wave soldering fixture usage times management system, which includes a main control module, an LCD display module, an indicator light alarm module, a temperature measurement circuit and a button circuit. The main control module includes a main control chip U3, the input ends of the LCD display module and the indicator light alarm module are connected to the output end of the main control chip U3, and the output ends of the temperature measurement circuit and the button circuit are connected to the input end of the main control chip U3.

[0037] Among them, the temperature measurement circuit is used to collect the current temperature signal in the wave soldering fixture furnace;

[0038] LCD display module, used to display information such as the number of times used and the current temperature of the fixture;

[0039] Indicator light alarm module, used to indicate system operation status, fixture usage alarm and system low battery alarm;

[0040] A button circuit is used to call up the usage count and display it on the LCD display screen of the LCD display module;

[0041] The main control chip U3 is used to determine whether the wave soldering fixture is used according to the current temperature signal of the fixture collected, so as to record the number of times it is used, and control the indicator light alarm module to send out an alarm signal according to the number of times it is used. The main control chip U3 includes but is not limited to a microcontroller of the model STM32F103C8T6.

[0042] Reference Figure 1 and Figure 2 , Figure 2It is a circuit schematic diagram of an LCD driving circuit. Further as an optional implementation scheme, the LCD display module includes an LCD display screen U2 and an LCD driving circuit. The LCD driving circuit includes an LCD driver U1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4 and a seventeenth resistor R17. The LCD display screen U2 is connected to the LCD driver U1, and the LCD driver U1 is connected to the main control chip U3. One ends of the first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 are all connected to the LCD driver U1, and the other ends of the first resistor R1, the second resistor R2, the third resistor R3 and the fourth resistor R4 are connected to the first power input terminal LCD_VCC. One ends of the first resistor R1, the second resistor R2 and the third resistor R3 are also connected to the main control chip U3. One end of the seventeenth resistor R17 is connected to the first power input terminal LCD_VCC, and the other end of the seventeenth resistor R17 is connected to the second power input terminal VCC.

[0043] The LCD display screen U2 is used to display information such as the number of times used and the current temperature of the fixture, including but not limited to the segment digital tube model QYT2977 produced by Qiyun Electronics Co., Ltd.;

[0044] LCD driver U1 is used to drive LCD display screen U2. It includes but is not limited to LCD driver model HT1621B;

[0045] The first resistor R1, the second resistor R2 and the third resistor R3 are pull-up resistors, which are used to make the CS, WR and DATA pins of the LCD driver high level by default;

[0046] The fourth resistor R4 is used to connect the first power input terminal LCD_VCC to the VLCD pin of the LCD driver U1;

[0047] The seventeenth resistor R17 is used to connect the second power input terminal VCC to the first power input terminal LCD_VCC;

[0048] In addition, a twentieth resistor R20 is reserved between the first power input terminal LCD_VCC and the PA15 pin of the main control chip U3. The twentieth resistor R20 is used to adjust the brightness of the LCD display U2. Different voltages in the range of 0-3.3V are provided through the PA15 pin of the main control chip U3 to make the brightness of the LCD display U2 change accordingly. When the twentieth resistor R20 is connected to the circuit, the seventeenth resistor R17 needs to be removed.

[0049] Reference Figure 3 , Figure 3This is a circuit schematic diagram of the temperature measurement circuit. Further as an optional implementation scheme, the temperature measurement circuit includes a fifth resistor R5 and a sixth resistor R6. Both ends of the fifth resistor R5 are connected to the main control chip U3. The main control chip U3 and the fifth resistor R5 are both connected to one end of the sixth resistor R6. The other end of the sixth resistor R6 is grounded.

[0050] The sixth resistor R6 is a thermistor. When the ambient temperature in the furnace changes, the resistance of the thermistor will also change accordingly, so that the current temperature in the wave soldering fixture furnace can be monitored in real time through the resistance of the thermistor. Including but not limited to the thermistor model PAT1000;

[0051] The fifth resistor R5 and the sixth resistor R6 together form a voltage divider circuit to achieve one-tenth voltage division.

[0052] 4(a), 4(b) and 4(c), FIG4(a) is a circuit schematic diagram of a system operation indication circuit, FIG4(b) is a circuit schematic diagram of a usage count alarm circuit, and FIG4(c) is a circuit schematic diagram of a low power alarm circuit. Further as an optional implementation scheme, the indicator light alarm module includes a system operation indication circuit, a usage count alarm circuit and a low power alarm circuit. The system operation indication circuit includes a first transistor D1 and a seventh resistor R7, the positive electrode of the first transistor D1 is connected to the main control chip U3 through the seventh resistor R7, and the negative electrode of the first transistor D1 is grounded. The usage count alarm circuit includes a second transistor D2 and a ninth resistor R9, the positive electrode of the second transistor D2 is connected to the main control chip U3 through the ninth resistor R9, and the negative electrode of the second transistor D2 is grounded. The low power alarm circuit includes a third transistor D3 and a tenth resistor R10, the positive electrode of the third transistor D3 is connected to the main control chip U3 through the tenth resistor R10, and the negative electrode of the third transistor D3 is grounded.

[0053] Wherein, the system operation indication circuit is used to indicate the operating status of the system;

[0054] A usage count alarm circuit is used to provide a light indication alarm when the counted usage count reaches a usage count threshold;

[0055] Low battery alarm circuit, used to indicate the alarm with light when the system battery is too low;

[0056] The first transistor D1, the second transistor D2 and the third transistor D3 are light emitting diodes, the first transistor D1 includes but is not limited to a green light emitting diode of model VLMTG1300-GS08, the second transistor D2 includes but is not limited to a red light emitting diode of model 19-217 / R6C-P1Q2 / 3T, and the third transistor D3 includes but is not limited to a yellow light emitting diode of model 19-213UYC / S530-A3 / TR8;

[0057] The seventh resistor R7 , the ninth resistor R9 and the tenth resistor R10 are current limiting resistors for limiting the current flowing through the first transistor D1 , the second transistor D2 and the third transistor D3 to adjust the corresponding brightness.

[0058] Reference Figure 5 , Figure 5 : is a circuit schematic diagram of a button circuit. Further as an optional implementation scheme, the button circuit includes a second button S2 and a sixteenth resistor R16. One end of the second button S2 is connected to the main control chip U3 through the sixteenth resistor R16, and the other end of the second button S2 is grounded.

[0059] The sixteenth resistor R16 is a current limiting resistor, which is used to limit the current flowing through the second button S2 so as to protect it from damage;

[0060] The second button S2 is used to trigger the usage count display operation. By pressing the second button S2, the usage count is called up and displayed on the LCD display screen U2.

[0061] Reference Figure 1 and Figure 6 , Figure 6 This is a circuit schematic diagram of a data storage circuit. Further as an optional implementation scheme, the wave soldering fixture usage times management system also includes a data storage circuit, which includes a memory U4, a ninth capacitor C9, an eighteenth resistor R18 and a nineteenth resistor R19. The first pin, the second pin, the third pin, the fourth pin and the seventh pin of the memory U4 are all grounded, the fifth pin and the sixth pin of the memory U4 are both connected to the main control chip U3, the fifth pin of the memory U4 is also grounded through the eighteenth resistor R18 and the ninth capacitor C9, the sixth pin of the memory U4 is also grounded through the nineteenth resistor R19 and the ninth capacitor C9, the eighth pin of the memory U4 is connected to the second power input terminal VCC, and the second power input terminal VCC is also connected between the eighteenth resistor R18 and the nineteenth resistor R19 and the ninth capacitor C9.

[0062] The data storage circuit is used to store the real-time collected temperature data and the statistical usage data to prevent the data from being lost due to a sudden power failure of the system.

[0063] Memory U4, used to store data to ensure that data is not lost when the system is powered off. Including but not limited to the EEPROM memory chip model AT24C04N-10SU-1.8 produced by Atmel;

[0064] The eighteenth resistor R18 and the nineteenth resistor R19 are pull-up resistors, which are used to make the SCL and SDA pins of the memory U4 default to a high level.

[0065] Reference Figure 1 and Figure 7 , Figure 7 This is a circuit schematic diagram of a reset circuit. Further as an optional implementation scheme, the wave soldering fixture usage management system also includes a reset circuit. The reset circuit includes a first button S1, a third capacitor C3 and a fourteenth resistor R14. One end of the fourteenth resistor R14 is connected to the second power input terminal VCC, and the other end of the fourteenth resistor R14 is grounded through the third capacitor C3. A main control chip U3 is connected between the fourteenth resistor R14 and the third capacitor C3. The fourteenth resistor R14 and the third capacitor C3 are also connected to one end of the first button S1, and the other end of the first button S1 is grounded.

[0066] Among them, the reset circuit is used to restore the system or program to the initial state;

[0067] The fourteenth resistor R14 is a pull-up resistor, which is used to make the NRST pin of the main control chip U3 high level by default;

[0068] The third capacitor C3 is a de-jitter capacitor, used to eliminate the jitter generated by the first button S1 to ensure the accuracy of the reset signal;

[0069] The first button S1 is used to trigger a reset operation. By pressing the first button S1, the charging process of the third capacitor C3 is triggered to generate a reset signal.

[0070] Reference Figure 1 As an optional implementation scheme, the wave soldering fixture usage times management system also includes a power module, which is connected to the main control chip U3.

[0071] The power module is used to supply power to the system. Specifically, the power module includes a power interface circuit and an external power supply, such as Figure 8 This is the circuit schematic diagram of the power interface circuit. The power interface circuit includes a power interface J3 and a diode D4. When an external power supply is inserted into the power interface J3, the positive electrode of the power interface J3 outputs a 3.3V DC power supply (the second power input terminal) through the diode D4 to power the system, and the negative electrode of the power interface J3 is grounded.

[0072] Reference Figure 1 , Fig. 9 as well as Fig.10 , Fig. 9 This is the circuit schematic diagram of the debug interface module. Fig.10 This is a circuit schematic diagram of the serial communication module. Further as an optional implementation scheme, the wave soldering fixture usage times management system also includes a debugging interface module and a serial communication module. Both the debugging interface module and the serial communication module are connected to the main control chip U3.

[0073] Among them, the debugging interface module is used to connect the burner through the debugging interface J1 to realize online debugging program burning;

[0074] The serial communication module is used to implement the serial communication function through the serial communication interface J2 for serial debugging.

[0075] Reference Figure 1 , Fig.11 as well as Fig.12 , Fig.11 This is the circuit schematic diagram of the main control chip and crystal oscillator module. Fig.12 : is a circuit schematic diagram of the filter module. Further as an optional implementation scheme, the main control module also includes a crystal oscillator module and a filter module, and both the crystal oscillator module and the filter module are connected to the main control chip U3.

[0076] The crystal oscillator module is used to provide a stable clock source for the system, and includes a first capacitor C1, a second capacitor C2, a crystal resonator X1 and an eleventh resistor R11, and the crystal resonator X1 includes but is not limited to a passive crystal oscillator of model 9C-8MHz;

[0077] The filter module is used to filter out noise in the circuit to make the main control chip work stably, and includes a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7 and an eighth capacitor C8.

[0078] In addition, the wave soldering fixture usage times management system also includes a BOOT circuit for determining the startup mode of the main control chip.

[0079] In summary, if Fig.13 This is the overall circuit schematic diagram of the wave soldering fixture usage times management system. The wave soldering fixture usage times management system is placed under the wave soldering fixture to detect the temperature inside the wave soldering fixture furnace and thus count the usage times.

[0080] like Fig.14 The temperature curve of the wave soldering fixture furnace is shown. The temperature measurement circuit collects the current temperature signal of the furnace environment every 2 seconds, and then transmits the collected current temperature signal to the main control chip. The main control chip records when the current temperature exceeds the preset temperature upper limit; when the temperature drops to room temperature, the number of uses is recorded as 1, and saved to the memory to prevent the number of uses from being lost due to battery power failure. The system loops the above steps until the recorded number of uses reaches the upper limit of the count, and the indicator light alarm circuit flashes the light signal alarm. The following Table 1 is the experimental statistical temperature measurement data table of the wave soldering fixture. The temperature upper limit is set to 150℃ according to the preheating temperature and welding temperature data of the fixture. When the current temperature in the furnace collected exceeds 150℃, the preparatory count is triggered.

[0081]

[0082] Table 1

[0083] Compared with the traditional wave soldering jig, the utility model collects the current ambient temperature signal in the wave soldering jig furnace through the temperature measurement circuit, and then determines whether the wave soldering jig is used according to the collected current temperature signal through the main control chip, and records the number of times it is used. The number of times it is used is displayed on the LCD display module through the button circuit. When the number of times it is used exceeds the preset threshold, the indicator light alarm module sends an alarm signal to prompt the staff to replace the wave soldering jig in time. On the one hand, it can realize the statistics of the number of times the wave soldering jig is used, and judge whether the wave soldering jig has reached its service life and replace it in time through the statistical number of uses, which can improve the reliability of the use of the wave soldering jig and reduce the risks and potential quality problems in the production process; on the other hand, the main control module, LCD display module, temperature measurement module and indicator light alarm circuit are integrated on a circuit board. The overall structure of the system is simple, the cost is low, and it is exquisite and compact, and easy to carry.

[0084] The above is a specific description of the preferred implementation of the utility model, but the utility model is not limited to the embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A wave soldering fixture usage times management system, characterized by: It includes a main control module, an LCD display module, an indicator light alarm module, a temperature measurement circuit and a button circuit. The main control module includes a main control chip. The input ends of the LCD display module and the indicator light alarm module are connected to the output end of the main control chip. The output ends of the temperature measurement circuit and the button circuit are connected to the input end of the main control chip.

2. A wave soldering fixture usage times management system according to claim 1, characterized in that: The LCD display module includes an LCD display screen and an LCD driving circuit, wherein the LCD driving circuit includes an LCD driver, a first resistor, a second resistor, a third resistor, a fourth resistor and a seventeenth resistor, the LCD display screen is connected to the LCD driver, the LCD driver is connected to the main control chip, one end of the first resistor, the second resistor, the third resistor and the fourth resistor are all connected to the LCD driver, the other ends of the first resistor, the second resistor, the third resistor and the fourth resistor are connected to a first power input terminal, one ends of the first resistor, the second resistor and the third resistor are also connected to the main control chip, one end of the seventeenth resistor is connected to the first power input terminal, and the other end of the seventeenth resistor is connected to the second power input terminal.

3. A wave soldering fixture usage times management system according to claim 1, characterized in that: The temperature measurement circuit includes a fifth resistor and a sixth resistor, both ends of the fifth resistor are connected to the main control chip, the main control chip and the fifth resistor are both connected to one end of the sixth resistor, and the other end of the sixth resistor is grounded.

4. A wave soldering fixture usage times management system according to claim 1, characterized in that: The indicator light alarm module includes a system operation indication circuit, a usage count alarm circuit and a low power alarm circuit. The system operation indication circuit includes a first transistor and a seventh resistor. The positive electrode of the first transistor is connected to the main control chip through the seventh resistor, and the negative electrode of the first transistor is grounded. The usage count alarm circuit includes a second transistor and a ninth resistor. The positive electrode of the second transistor is connected to the main control chip through the ninth resistor, and the negative electrode of the second transistor is grounded. The low power alarm circuit includes a third transistor and a tenth resistor. The positive electrode of the third transistor is connected to the main control chip through the tenth resistor, and the negative electrode of the third transistor is grounded.

5. A wave soldering fixture usage times management system according to claim 1, characterized in that: The button circuit includes a second button and a sixteenth resistor, one end of the second button is connected to the main control chip through the sixteenth resistor, and the other end of the second button is grounded.

6. A wave soldering fixture usage times management system according to claim 1, characterized in that: The wave soldering fixture usage times management system also includes a data storage circuit, which includes a memory, a ninth capacitor, an eighteenth resistor and a nineteenth resistor. The first pin, the second pin, the third pin, the fourth pin and the seventh pin of the memory are all grounded, the fifth pin and the sixth pin of the memory are both connected to the main control chip, the fifth pin of the memory is also grounded through the eighteenth resistor and the ninth capacitor, the sixth pin of the memory is also grounded through the nineteenth resistor and the ninth capacitor, the eighth pin of the memory is connected to the second power input terminal, and the second power input terminal is also connected between the eighteenth resistor and the nineteenth resistor and the ninth capacitor.

7. A wave soldering fixture usage times management system according to claim 1, characterized in that: The wave soldering fixture usage times management system also includes a reset circuit, which includes a first button, a third capacitor and a fourteenth resistor, one end of the fourteenth resistor is connected to the second power input terminal, the other end of the fourteenth resistor is grounded through the third capacitor, the main control chip is connected between the fourteenth resistor and the third capacitor, and one end of the first button is also connected between the fourteenth resistor and the third capacitor, and the other end of the first button is grounded.

8. A wave soldering fixture usage times management system according to claim 1, characterized in that: The wave soldering fixture usage times management system also includes a power module, and the power module is connected to the main control chip.

9. A wave soldering fixture usage times management system according to claim 1, characterized in that: The wave soldering fixture usage times management system also includes a debugging interface module and a serial communication module, and both the debugging interface module and the serial communication module are connected to the main control chip.

10. A wave soldering fixture usage times management system according to claim 1, characterized in that: The main control module also includes a crystal oscillator module and a filter module, and both the crystal oscillator module and the filter module are connected to the main control chip.

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