CN114371386A

CN114371386A - Test circuit for detecting circuit board function

Info

Publication number: CN114371386A
Application number: CN202111630595.5A
Authority: CN
Inventors: 华罗明
Original assignee: Ruima Guangzhou Electronic Technology Co ltd
Current assignee: Ruima Guangzhou Electronic Technology Co ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-04-19

Abstract

The application relates to a test circuit for detecting the function of a circuit board, which comprises a power supply module, an MCU control module, a switch module, an action module and a display driving module; the power supply module is coupled with the MCU control module, the switch module, the action module and the display driving module; the MCU control module is used for sending a closing control signal to the switch module and sending a driving control signal to the display driving module after sending the closing control signal; the switch module outputs a closing signal to the action module when receiving the closing control signal; the action module comprises a direct-acting electromagnetic valve, and when the electromagnetic valve receives a closing signal, a valve body of the electromagnetic valve pushes the switch component. This application has the effect that the switch components and parts are tested to PCB board conveniently.

Description

Test circuit for detecting circuit board function

Technical Field

The application relates to the technical field of automatic testing, in particular to a test circuit for detecting functions of a circuit board.

Background

At present, after the PCB finishes the procedures of tin coating, surface mounting and the like, the functions of the PCB and components on the PCB need to be tested, and the failed PCB is judged and recovered according to the test result to be reprocessed so as to improve the delivery quality of the PCB.

When the function of the circuit board of the aromatherapy machine is tested, the test circuit applies a working power supply and a test signal to the PCB to judge whether the function of the PCB normally operates. When testing components of switch class, generally still adopt the mode of manual pressure, stirring, the operation is comparatively loaded down with trivial details and have electrostatic interference, and PCB board switch components and parts's test is inconvenient, influences the efficiency of software testing of PCB board, consequently awaits the improvement.

Disclosure of Invention

The testing efficiency of the PCB is higher in order to test the switch components on the PCB conveniently; the application provides a test circuit for detecting circuit board functions.

The above object of the present invention is achieved by the following technical solutions:

a test circuit for detecting circuit board functions comprises a power supply module, an MCU control module, a switch module, an action module and a display drive module;

the power supply module is coupled with the MCU control module, the switch module, the action module and the display driving module to provide working voltage for normal work of the modules;

the MCU control module is used for sending a closing control signal to the switch module when power is on, sending a driving control signal to the display driving module after the MCU control module sends the closing control signal, and outputting the driving signal to display a detection result on an LCD screen when the display driving module receives the driving control signal;

the switch module outputs a closing signal to the action module when receiving the closing control signal; the action module comprises a direct-acting electromagnetic valve, the electromagnetic valve is arranged on one side of the switch component, and when the electromagnetic valve receives a closing signal, a valve body of the electromagnetic valve pushes the switch component;

when the switch module receives a turn-off control signal sent by the MCU control module, the switch module sends a turn-off signal to the electromagnetic valve, and when the electromagnetic valve receives the turn-off signal, the electromagnetic valve is powered off and the valve body of the electromagnetic valve is not in contact with the switch component.

By adopting the technical scheme, when the switch component of the circuit board is tested, the power supply module supplies working voltage to the MCU control module, the switch module, the action module and the display driving module, after the PCB is electrified, MCU control module sends closed control signal to switch module, switch module receives closed control signal back output closed signal and gets electricity with the control solenoid valve, the switch components and parts on the valve body promotion PCB board when the solenoid valve gets electricity, whether normal work of this switch is then realized examining to switch components and parts closure, further MCU control module sends turn-off control signal to switch module, switch module sends turn-off signal to solenoid valve when receiving turn-off control signal, the valve body of solenoid valve is in order to loosen switch components and parts towards the direction withdrawal of keeping away from switch components and parts, and then realized the automatic test to switch components and parts, the security performance is better simultaneously.

Optionally, the switch module includes a first MOS transistor Q1 and a first relay K1, a gate of the first MOS transistor Q1 is coupled to a switch control signal output end of the MCU control module, a drain of the first MOS transistor Q1 is coupled to the power supply module after being connected in series with a coil of the relay K1, a source of the first MOS transistor Q1 is grounded, the relay K1 includes a normally open contact switch K1-1, and the normally open contact switch K1-1 is connected in series in a power supply loop of the solenoid valve.

By adopting the technical scheme, the switch control signal output end of the MCU control module outputs a closing starting signal to the grid electrode of the first MOS tube Q1, so that the source electrode and the drain electrode of the first MOS tube Q1 are conducted, the coil of the first relay K1 is electrified, the normally open contact switch K1-1 is attracted, and the electromagnetic valve is electrified; when the grid of the first MOS tube Q1 receives a turn-off starting signal, the drain and the source of the first MOS tube Q1 are disconnected, the coil of the K1 loses power, the normally open contact switch K1-1 restores to a normally open state, the electromagnetic valve loses power, and the electromagnetic valve is controlled to lose power.

Optionally, the frequency testing module further includes a frequency testing module of the atomizing plate, the frequency testing module is coupled to a frequency starting signal output end of the MCU control module, when receiving a frequency starting signal sent by the MCU control module, the frequency testing module sends a closing signal to couple the atomizing plate of the PCB, the frequency testing module includes a second MOS transistor Q2, a third MOS transistor Q3 and a second relay K2, the second relay K2 includes a normally open contact switch K2-1, a drain of the second MOS transistor Q2 is coupled to a frequency testing end of the MCU control module, a drain of the second MOS transistor Q2 is coupled to the power supply module, a source of the second MOS transistor Q2 is grounded, a gate of the second MOS transistor Q2 is coupled to the atomizing plate after being connected in series with the normally open contact switch K2-1, a gate of the third MOS transistor Q3 is coupled to the frequency starting signal output end of the control module, a drain of the third MOS transistor Q3 is coupled to the power supply module after being connected in series with the second relay K2, the source of the third MOS transistor Q3 is grounded.

Through adopting above-mentioned technical scheme, send frequency start signal through MCU control module, make the grid of third MOS pipe Q3 receive the high level, the source electrode and the drain electrode of third MOS pipe Q3 switch on, second relay K2's coil is electrified, normally open contact switch K2-1 actuation, the high level is received to second MOS pipe Q2's grid this moment, second MOS pipe Q2 switches on, second MOS pipe Q2's drain electrode sends frequency test signal to MCU control module's frequency test end this moment, realize the test of the operating frequency of last atomizing piece of champignon machine.

Optionally, the LED testing device further comprises an LED testing module for detecting the light emitting components on the PCB, the LED testing module comprises a color temperature detecting sub-module and a brightness detecting sub-module, the MCU control module also comprises a color temperature starting signal output end and a brightness starting signal output end, the color temperature starting signal output end is connected with the serial signal input end of the color temperature detection submodule through a serial port, the brightness starting signal output end is connected with the serial signal input end of the brightness conversion submodule through a serial port, the color temperature detection submodule and the brightness detection submodule are both coupled with a light-emitting component on the PCB board to receive brightness and color temperature signals, the serial signal output ends of the color temperature detection submodule and the brightness detection submodule are coupled to a serial data receiving end of the MCU control module to output brightness and color temperature signals, and the MCU control module receives the brightness and color temperature signals and outputs the brightness and color temperature signals to the display driving module.

Through adopting above-mentioned technical scheme, test circuit has still included the colour temperature and the luminance of LED lamp on the PCB board and has detected, with the qualification rate that sends the light-emitting component on the improvement PCB board, send the signal that begins to detect through MCU control module last excellent temperature start signal output part and luminance start signal output part, colour temperature detection submodule piece and luminance detection submodule piece acquire the luminance and the colour temperature of light-emitting component on the circuit board through serial ports connected's mode, through serial data's mode, with luminance, colour temperature signal exports the serial data receiving terminal of MCU control module through serial ports, MCU control module receives luminance, colour temperature signal and export to showing drive module, show colour temperature result and luminance result at the display screen so that whether the staff discerns the colour temperature and the luminance of light-emitting component and reach standard.

Optionally, the PCB control module is coupled to the MCU control module, so as to switch on a power supply loop between the power supply module and the positive electrode and the negative electrode of the PCB when receiving a power supply control signal sent by the MCU control module, the PCB control module includes a fourth MOS transistor Q4, a fifth MOS transistor Q5, a third relay K3, and a fourth relay K4, a gate of the fourth MOS transistor Q4 is coupled to the MCU control module to receive the power supply control signal, a source of the fourth MOS transistor Q4 is grounded, a drain of the fourth MOS transistor Q4 is coupled to the power supply module after being connected in series with the third relay K3, the third relay K3 includes a normally open contact switch K3-1, the normally open contact switch K3-1 is connected in series between the power supply module and the positive electrode of the PCB, a gate of the fifth transistor Q5 is coupled to the MCU control module to receive the power supply control signal, the source of the fifth MOS transistor Q5 is grounded, the drain of the fifth MOS transistor Q5 is coupled to the power supply module after being connected in series with the fourth relay K4, the fourth relay K4 includes a normally open contact switch K4-1, and the normally open contact switch K4-1 is connected in series between the negative electrode of the PCB and the ground terminal.

Through adopting above-mentioned technical scheme, send power supply control signal control fourth MOS pipe Q4, the on-state of fifth MOS pipe Q5 through MCU control module, and then make third relay K3, fourth relay K4 closed, switch on the positive negative pole return circuit of PCB board, integrated power supply and test function to the PCB board, improve the reliability of PCB board functional test, also make things convenient for the staff to control test circuit more simultaneously.

Optionally, the power supply module includes an electromagnetic valve power supply module, a PCB power supply module, a relay power supply module, and an MCU power supply module;

the electromagnetic valve power supply module is used for accessing 24V direct current and outputting VDD12V direct current to the electromagnetic valve so as to supply power to the electromagnetic valve; outputting the VDD12V direct current to an input end of a PCB power supply module; outputting 12V to the input end of the relay power supply module;

the input end of the PCB power supply module receives VDD12V direct current and outputs DC5V direct current to the anode of the PCB;

the relay power supply module receives VDD12V direct current and outputs VDD5V direct current to coils of a first relay K1, a second relay K2, a third relay K3 and a fourth relay K4;

the MCU power supply module is coupled to the relay power supply module to receive the VDD5V direct current and output VDD3.3V direct current to the MCU control module.

Through adopting above-mentioned technical scheme, power module divide into solenoid valve power supply module, PCB board power supply module, relay power supply module and MCU power supply module, provides the direct current of different voltage values to be applicable to different operating voltage's components and parts, test circuit's work is comparatively stable.

Optionally, the power supply module further includes an atomizer voltage detection module for testing voltage of an atomizer on the PCB, and the power supply module further includes an atomizer power supply module for supplying power to the atomizer on the PCB, where the atomizer power supply module is connected to VDD12V direct current and outputs VDDVAR direct current; the atomizer voltage detection module comprises a sixth MOS tube Q6, a fifth relay K5 and a first sliding resistor VR1, the grid electrode of the sixth MOS tube Q6 is coupled to the voltage starting signal output end of the MCU control module, the source electrode of the sixth MOS tube Q6 is grounded, the drain electrode of the sixth MOS tube Q6 is coupled to the VDD5V direct current after being connected with the coil of the fifth relay K5 in series, the fifth relay K5 comprises a normally-open contact switch K5-1, one end of the normally-open contact switch K5-1 is coupled to the atomizer power supply module to receive the VDDVR direct current, the other end of the normally-open contact switch K5-1 is coupled to a fixed end of the first sliding resistor VR1, and the other fixed end of the first sliding resistor VR1 is grounded.

Through adopting above-mentioned technical scheme, test circuit has the test to atomizer during operation voltage, in order to confirm the voltage condition of atomizer during operation, the condition that reduces atomizer during operation and cross undervoltage appears, MCU control module sends voltage start signal makes sixth MOS pipe Q6 switch on, fifth relay K5's coil is electrified, normally open contact switch K5-1 actuation, the power supply circuit of VDDVR direct current and atomizer test point on the PCB board has switched on, test signal sends to MCU control module through sixth MOS pipe Q6's grid, MCU control module sends the display drive module with the test result again and shows in order showing at the display screen.

Optionally, the device further comprises an acousto-optic prompting module, wherein the acousto-optic prompting module comprises a light emitting diode D1 which is powered to emit red light, a light emitting diode D2 which is powered to emit green light, a light emitting diode D1 and a light emitting diode D2 which are connected in parallel in the same direction, anodes of the light emitting diodes D1 and D2 are coupled to the MCU power supply module to obtain VDD3.3V dc power, cathodes of the light emitting diodes D1 and D2 are coupled to a light-activated signal output end of the MCU control module, when the MCU control module tests the voltage, the current, the frequency of the atomization sheet, the voltage of the atomizer or the color temperature and the brightness of the LED, the MCU control module sends out a light starting signal to conduct the light emitting diode D1, when the MCU control module completes the test of the voltage, the current, the frequency of the atomization sheet, the voltage of the atomizer or the color temperature and the brightness of the LED, the MCU control module sends out a light starting signal to conduct the light emitting diode D2.

Through adopting above-mentioned technical scheme, send red light and send the diode of green glow through the setting to the real-time test condition of suggestion staff test circuit, so that remind the staff to learn whether test circuit is in operating condition, the suggestion effect is better.

Optionally, the reputation suggestion module still includes bee calling organ and first triode Q1, the one end of bee calling organ is coupled in MCU power supply module in order to obtain the VDD3.3V direct current, the other end of bee calling organ is coupled in first triode Q1's collecting electrode, first triode Q1's projecting pole ground connection, first triode Q1's base is coupled in MCU control module's sound start signal output, tests when PCB board voltage, electric current, atomizing piece frequency, atomizer voltage or LED colour temperature, luminance test completion when MCU control module, MCU control module sends sound start signal, and first triode Q1 switches on bee calling organ and sends sound prompt signal.

Through adopting above-mentioned technical scheme, still through setting up bee calling organ, send sound prompt signal when the test is accomplished to the PCB board, if the staff is difficult for perceiving emitting diode D1, emitting diode D2's change in the bright environment of light, then send sound prompt signal through bee calling organ and accomplish in order to remind the staff to test to improve the efficiency that the staff changed the test PCB board.

In summary, the present application includes at least one of the following beneficial technical effects:

the method comprises the following steps that 1, an MCU control module sends a turn-off control signal to a switch module, the switch module sends the turn-off signal to an electromagnetic valve when receiving the turn-off control signal, and a valve body of the electromagnetic valve retracts in the direction far away from a switch component to loosen the switch component, so that automatic testing of the switch component is realized, and meanwhile, the safety performance is good;

2. when the grid electrode of the first MOS tube Q1 receives a turn-off starting signal, the drain electrode and the source electrode of the first MOS tube Q1 are disconnected, the coil of the K1 loses power, the normally open contact switch K1-1 is restored to a normally open state, the electromagnetic valve loses power, and the electromagnetic valve is controlled to lose power;

3. through the mode of serial data, with luminance, colour temperature signal through serial signal output to MCU control module's serial data receiving terminal, MCU control module receives luminance, colour temperature signal and exports to display driver module, shows colour temperature result and luminance result at the display screen so that whether the staff discerns the colour temperature and the luminance of light emitting component and reach standard.

Drawings

FIG. 1 is a block diagram of the overall architecture of an embodiment of the present application;

FIG. 2 is a circuit diagram of an MCU control module in the embodiment of the present application;

FIG. 3 is a circuit diagram of a switch module and an action module in an embodiment of the present application;

FIG. 4 is a circuit diagram of a frequency test module in an embodiment of the present application;

FIG. 5 is a circuit diagram of an LED test module in an embodiment of the present application;

FIG. 6 is a circuit diagram of a PCB control module in an embodiment of the present application;

FIG. 7 is a circuit diagram of an atomizer power supply module and an atomizer voltage detection module in an embodiment of the present application;

FIG. 8 is a circuit diagram of a power supply module of the solenoid valve in the embodiment of the present application;

FIG. 9 is a circuit diagram of a power supply module of a PCB board in an embodiment of the present application;

FIG. 10 is a circuit diagram of a relay power supply module and an MCU power supply module in the embodiment of the present application;

FIG. 11 is a circuit diagram of an acousto-optic prompt module in an embodiment of the present application;

FIG. 12 is a circuit diagram of a display driver module according to an embodiment of the present application;

fig. 13 is a circuit diagram of a PCB board current voltage detection module in the embodiment of the present application.

Description of reference numerals: 1. a color temperature detection submodule; 2. a brightness detection sub-module; 3. an atomizer power supply module; 4. an atomizer voltage detection module; 5. a relay power supply module; 6. and the MCU supplies power to the electronic module.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is further described in detail below with reference to fig. 1-13 and the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

Including being used for with the vaporizer of perfume gasification on the PCB board of champignon machine, including the atomizing piece that plays main atomization in the atomizer, test circuit mainly is applied to the test of champignon machine circuit board in this embodiment, in other embodiments, also can be used to the PCB board of the equipment that has the atomizing function.

The embodiment of the application discloses a test circuit for detecting the function of a circuit board. In a first embodiment, referring to fig. 1, the circuit board function detection test circuit includes a power supply module, an MCU control module, a switch module, an action module, a frequency test module, an LED test module, a PCB control module, an atomizer voltage detection module 4, an acousto-optic prompt module, a PCB current voltage test module, and a display driver module.

The power supply module comprises an electromagnetic valve power supply module, a PCB power supply module, a relay power supply module 5, an atomizer power supply module 3 and an MCU power supply module 6. The LED test module comprises a color temperature detection submodule 1 and a brightness detection submodule 2.

The electromagnetic valve power supply module is connected with 24V direct current and outputs VDD12V direct current to supply power to the action module and the atomizer voltage detection module 4; outputting the VDD12V direct current to an input end of a PCB power supply module; and 12V is output to the input end of the relay power supply module 5.

And the PCB power supply module receives the VDD12V direct current and outputs DC5V direct current to the anode of the PCB.

The relay power supply module 5 receives the VDD12V direct current and outputs a VDD5V direct current to supply power to the switch module, the frequency testing module, the PCB control module and the atomizer voltage detection module 4;

the MCU power supply module 6 is coupled to the relay power supply module 5 to receive VDD5V direct current and output VDD3.3V direct current to supply power to the MCU control module, the atomizer voltage detection module 4, the acousto-optic prompt module, the display drive module, the color temperature detection sub-module 1 and the brightness detection sub-module 2.

The atomizer power supply module 3 is connected with the VDD12V direct current and outputs VDDVAR direct current to the atomizer voltage detection module 4.

The MCU control module comprises a switch control signal output end, a frequency starting signal output end, a frequency testing end, a color temperature starting signal output end, a brightness starting signal output end, a serial data receiving end, a power supply control signal output end, a voltage starting signal output end, a light starting signal output end, a sound starting signal output end and a drive control signal output end; the switch control signal output end is used for sending a closing control signal and a switching-off control signal to the switch module. The frequency starting signal output end is used for sending a frequency starting signal to the frequency testing module to start the detection of the working frequency of the atomizing plate, and the frequency testing end is coupled to the frequency testing module to receive the testing signal. The color temperature starting signal output end is coupled with the color temperature detection submodule 1 and sends out a color temperature starting signal to start the detection of the color temperature of the LED, and the brightness starting signal output end is coupled with the brightness detection submodule 2 and sends out a brightness starting signal to start the detection of the brightness of the LED; the serial data receiving terminal is coupled to the color temperature detection sub-module 1 and the brightness detection sub-module 2 for receiving the serial data. The power supply control signal output end is coupled to the positive pole of the PCB which is conducted by the PCB control module. The voltage start signal output end is coupled to the atomizer voltage detection module 4 and sends a voltage start signal to start the test of the atomizer voltage. The light starting signal output end and the sound starting signal output end are both coupled to the sound and light prompting module to enable the sound and light prompting module to send out sound and light prompting signals. The drive control signal output end is used for outputting a drive control signal to the display drive module so as to display the test result on the LCD screen in a data form.

The switch module is coupled to the MCU control module and outputs a closing signal to the action module when receiving the closing control signal, and sends a closing signal to the action module when receiving the closing control signal.

The action module comprises a direct-acting electromagnetic valve, the electromagnetic valve is arranged on one side of the switch component, and when the electromagnetic valve receives a closing signal, a valve body of the electromagnetic valve pushes the switch component; when the electromagnetic valve receives the turn-off signal, the power is lost and the valve body of the electromagnetic valve is not contacted with the switch component.

The frequency testing module is used for sending a closing signal to couple the atomizing sheet of the PCB when receiving a frequency starting signal sent by the MCU control module; and sends the test signal back to the frequency test terminal.

The color temperature detection submodule 1 and the brightness detection submodule 2 are both coupled to the light-emitting component on the PCB board to receive the brightness and color temperature signals, and output the brightness and color temperature signals to the serial data receiving end of the MCU control module through the serial signal output end.

And the PCB control module is coupled to the MCU control module and used for conducting a power supply loop between the power supply module and the anode and the cathode of the PCB when receiving a power supply control signal sent by the MCU control module.

The atomizer voltage detection module 4 is coupled in the MCU control module and in the working circuit of atomizer, when receiving the voltage start signal of MCU control module output, switches on atomizer power supply module 3 and atomizer working circuit.

And the acousto-optic prompt module is coupled with the MCU control module to send out an optical prompt signal when receiving the optical start signal, and is coupled with the MCU control module to send out a sound prompt signal when receiving the sound start signal.

The PCB current voltage test module is coupled to the MCU control module to detect the working voltage of each point of the PCB and the working current of the PCB.

And the display driving module is coupled with the MCU control module and used for displaying the test result data on the LCD screen when receiving the driving signal.

Referring to fig. 2, the MCU control module includes an MCU control chip U1, and a ninety-sixth pin of the MCU control chip U1 is a switch control signal output terminal; u1, a first hundred pin of the MCU control chip U1 is a frequency starting signal output end, a first hundred three pins of the MCU control chip U1 are frequency testing ends, a first hundred pin of the MCU control chip U1 is a color temperature starting signal output end and a brightness starting signal output end, and a first hundred two pins of the MCU control chip U1 are serial data receiving ends; a fifty-fifth pin and a fifty-third pin of the MCU control chip U1 are power supply control signal output ends; a forty-eighth pin of the MCU control chip U1 is a voltage starting signal output end; a twenty-eighth pin and a twenty-ninth pin of the MCU control chip U1 are optical starting signal output ends; the one hundred thirty-fifth pin of the MCU control chip U1 is a sound start signal output terminal, and the first to fifth pins, the fifty-fourth to sixty-first pin, the sixty-third to sixty-eight pin, the one hundred forty-first pin, and the one hundred forty-twelve pin of the MCU control chip U1 are driving control signal output terminals. The sixth pin, the seventeenth pin, the fortieth pin, the fifty-second pin, the sixtieth pin, the seventy-second pin, the eighty-fourth pin, the ninety-fifth pin, the one-hundred-eight pin, the one-hundred-twenty-first pin, the one-hundred-thirty-one pin and the one-hundred-forty-four pin of the MCU control chip U1 are all connected with VDD3.3V direct current. Coupled to the twenty-fifth pin of MCU control chip U1 is an activation button SW 1.

Referring to fig. 3, the switch module includes a first MOS transistor Q1, a first relay K1, a first resistor R1 and a second resistor R2, a gate of the first MOS transistor Q1 is connected in series with the first resistor R1 and then coupled to a ninety-sixth pin of the MCU control module, a gate of the first MOS transistor Q1 is connected in series with the second resistor R2 and then grounded, a drain of the first MOS transistor Q1 is connected in series with a coil of the relay K1 and then coupled to the power supply module, a source of the first MOS transistor Q1 is grounded, the relay K1 includes a normally open contact switch K1-1, and the normally open contact switch K1-1 is connected in series in a power supply loop of the solenoid valve.

Referring to fig. 4, the frequency test module includes a second MOS transistor Q2, a third MOS transistor Q3, a second relay K2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a seventh resistor R7, the second relay K2 includes a normally open contact switch K2-1, a drain of the second MOS transistor Q2 is coupled to the first three pins of the MCU control module, a drain of the second MOS transistor Q2 is coupled to the MCU power supply module 6 after being connected in series with the third resistor R3, a source of the second MOS transistor Q2 is grounded, a gate of the second MOS transistor Q2 is coupled to the fourth resistor R4 after being connected in series with the normally open contact switch K2-1 on the PCB board after being connected in series with the third resistor R3, a gate of the second MOS transistor Q2 is coupled to the ground after being connected in series with the fourth resistor R4, a gate of the third MOS transistor Q3 is coupled to the sixth resistor R6 after being connected in series with the third pin, and a seventh resistor R3, the drain of the third MOS transistor Q3 is coupled to the power supply module after being connected in series with the second relay K2, and the source of the third MOS transistor Q3 is grounded.

Referring to fig. 5, the luminance detection sub-module 2 includes a signal conversion chip U2, a thirteenth pin of the signal conversion chip U2 is a serial signal output terminal, a fourteenth pin of the signal conversion chip U2 is a serial signal input terminal, a thirteenth pin and a fourteenth pin of the signal conversion chip U2 are both coupled to an LED on a PCB board to obtain a luminance signal, an eleventh pin of the signal conversion chip U2 is coupled to a first-hundred-th pin of the MCU control module to receive a signal for starting a luminance test, and a twelfth pin of the signal conversion chip U2 is coupled to a second-hundred-th pin of the MCU control module to transmit serial data to the MCU control chip.

Referring to fig. 5, the color temperature detection sub-module 1 includes a signal conversion chip U3, a thirteenth pin of the signal conversion chip U3 is a serial signal output terminal, a fourteenth pin of the signal conversion chip U3 is a serial signal input terminal, a thirteenth pin and a fourteenth pin of the signal conversion chip U3 are both coupled to an LED on a PCB board to obtain a color temperature signal, an eleventh pin of the signal conversion chip U3 is coupled to a first-hundred-th pin of the MCU control module to receive a signal for starting a color temperature test, and a twelfth pin of the signal conversion chip U3 is coupled to a second-hundred-th pin of the MCU control module to transmit serial data to the MCU control chip.

Referring to fig. 6, the PCB control module includes a fourth MOS transistor Q4, a fifth MOS transistor Q5, a third relay K3, a fourth relay K4, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, an eleventh resistor R11, a twelfth resistor R12, a fourteenth resistor R14, a fifteenth resistor R15, and a fuse F1, a gate of the fourth MOS transistor Q4 is coupled to the MCU control module after being connected in series with the eighth resistor R8 to receive a power supply control signal, a gate of the fourth MOS transistor Q4 is coupled to the ninth resistor R9 and then connected to ground, a source of the fourth MOS transistor Q4 is connected to ground, a drain of the fourth MOS transistor Q4 is coupled to the relay power supply module 5 after being connected in series with the third relay K3, the third relay K367 includes a normally open contact switch K3-1, the normally open contact switch K3-1 is coupled to the PCB 3 power supply module and the fuse F3, and a positive electrode of the fifth transistor F3 is coupled to the gate of the fifth relay Q3 and the fifth relay K3, and the gate of the fifth transistor Q3 are coupled to the switch The power supply control signal is received, the source of the fifth MOS transistor Q5 is grounded, the drain of the fifth MOS transistor Q5 is coupled to the relay power supply module 5 after being connected in series with the fourth relay K4, the fourth relay K4 comprises a normally open contact switch K4-1, one end of the normally open contact switch K4-1 is coupled to the negative electrode of the PCB, the other end of the normally open contact switch K4-1 is grounded after being connected in series with an eleventh resistor R11, a tenth resistor R10 is connected in parallel to two sides of a normally open contact switch K4-1, and a twelfth resistor R12 is connected in parallel to two sides of an eleventh resistor R11.

Referring to fig. 7, the atomizer voltage detecting module 4 includes a sixth MOS transistor Q6, a fifth relay K5, a first sliding resistor VR1, a seventeenth resistor R17 and an eighteenth resistor R18, a gate of the sixth MOS transistor Q6 is coupled to the forty-eighth pin of the MCU control module after being connected in series with the seventeenth resistor R17 to receive a voltage start signal, a gate of the sixth MOS transistor Q6 is coupled to the eighteenth pin of the MCU control module after being connected in series with the eighteenth resistor R17, a source of the sixth MOS transistor Q6 is grounded, a drain of the sixth MOS transistor Q6 is coupled to the VDD5V dc after being connected in series with a coil of the fifth relay K5, the fifth relay K5 includes a normally open contact switch K5-1, one end of the normally open contact switch K5-1 is coupled to the atomizer power supply module 3 to receive the VDDVAR dc, the other end of the normally open contact switch K5-1 is coupled to a fixed end of the first sliding resistor VR1, and the other fixed end of the first sliding resistor VR1 is grounded.

Referring to fig. 7, the atomizer power supply module 3 includes a voltage regulation chip U4, a first inductor L1, a first voltage regulation diode D1 and a second sliding resistor VR2, a fifth pin of the voltage regulation chip U4 is coupled to the relay power supply module 5 to access VDD12V, a third pin of the voltage regulation chip U4 is coupled to a fixed end of the second sliding resistor VR2 after being connected in series with the first inductor L1, another fixed end of the second sliding resistor VR2 is coupled to a ground after being coupled to a sliding end, a sliding end of the second sliding resistor VR2 is coupled to a sliding end of the first sliding resistor VR2, a sliding end of the second sliding resistor VR2 is coupled to a second pin of the voltage regulation chip U4, and the first voltage regulation diode D1 is connected in parallel between the third pin and the first pin of the voltage regulation chip U4.

Referring to fig. 8, the solenoid power supply module includes a voltage regulator chip U8, a fourth inductor L4, a fourth zener diode D4 and a fifth sliding resistor VR5, a fifth pin of the voltage regulator chip U8 is connected to 24VDC direct current, a third pin of the voltage regulator chip U8 is coupled to a fixed end of the fifth sliding resistor VR5 after being connected in series with the fourth inductor L4, another fixed end of the fifth sliding resistor VR5 is coupled to a ground after being coupled to a sliding end, a sliding end of the fifth sliding resistor VR5 is coupled to a second pin of the voltage regulator chip U8, and the fourth zener diode D4 is connected in parallel between the third pin and the first pin of the voltage regulator chip U8.

Referring to fig. 9, the PCB power supply module includes a voltage regulator chip U7, a third inductor L3, a third zener diode D3 and a fourth sliding resistor VR4, a fifth pin of the voltage regulator chip U7 is connected to the VDD12V dc, a third pin of the voltage regulator chip U7 is coupled to a fixed end of the fourth sliding resistor VR4 after being connected in series with the third inductor L3, another fixed end of the fourth sliding resistor VR4 is coupled to a ground after being coupled to a sliding end, a sliding end of the fourth sliding resistor VR4 is coupled to a second pin of the voltage regulator chip U7, and the third zener diode D3 is connected in parallel between the third pin and the first pin of the voltage regulator chip U7.

Referring to fig. 10, the relay power supply module 5 includes a voltage regulator chip U5, a second inductor L2, a second zener diode D2 and a third sliding resistor VR3, a fifth pin of the voltage regulator chip U5 is connected to the VDD12V direct current, a third pin of the voltage regulator chip U5 is coupled to a fixed end of the third sliding resistor VR3 after being connected in series with the second inductor L2, another fixed end of the third sliding resistor VR3 is coupled to a ground after being coupled to a sliding end, a sliding end of the third sliding resistor VR3 is coupled to a second pin of the voltage regulator chip U5, the second zener diode D2 is connected in parallel between the third pin and the first pin of the voltage regulator chip U5, a single-pole double-throw switch is coupled to the third sliding resistor VR3, and a certain contact of the single-pole double-throw switch is coupled to the third sliding resistor VR 3.

Referring to fig. 10, the MCU power supply module 6 includes a voltage regulator chip U6, a third fuse F3, a fourth fuse F4, and a fifth voltage regulator diode D5, wherein a third pin of the voltage regulator chip U6 is coupled to a moving contact of the single-pole double-throw switch, a second pin of the voltage regulator chip U6 is coupled to a fourth fuse F4, and the third fuse F3 is connected in parallel to two ends of the fourth fuse F4.

Referring to fig. 11, the audio-visual prompting module includes an audio-visual prompting module including a light emitting diode D1 for emitting red light, a light emitting diode D2 for emitting green light, a buzzer, and a first triode Q1, the light emitting diode D1 and the light emitting diode D2 are connected in parallel in the same direction, anodes of the light emitting diode D1 and the light emitting diode D2 are coupled to the MCU power supply module 6 to obtain VDD3.3V direct current, cathodes of the light emitting diode D1 and the light emitting diode D2 are coupled to a light-activated signal output terminal of the MCU control module, when the MCU control module tests the voltage, the current, the frequency of the atomization sheet, the voltage of the atomizer or the color temperature and the brightness of the LED, the MCU control module sends out a light starting signal to conduct the LED D1, when the MCU control module completes the test of the voltage, the current, the frequency of the atomization sheet, the voltage of the atomizer or the color temperature and the brightness of the LED, the MCU control module sends out a light starting signal to conduct the light emitting diode D2.

The acousto-optic prompt module still includes bee calling organ and first triode Q1, the one end of bee calling organ is coupled in order to obtain VDD3.3V direct current in MCU power supply sub module 6, the other end of bee calling organ is coupled in the collecting electrode of first triode Q1, the projecting pole ground connection of first triode Q1, the base of first triode Q1 is coupled in MCU control module's sound start signal output part, when MCU control module tests PCB board voltage, the electric current, the fog piece frequency, atomizer voltage or LED colour temperature, when the luminance test is accomplished, MCU control module sends sound start signal, first triode Q1 switches on the bee calling organ and sends sound prompt signal.

Referring to fig. 12, the display driving module includes a 3V3LCD chip P1, a pair of pins from the third pin to the fifteenth pin of the 3V3LCD chip P1, and a seventeenth pin and an eighteenth pin both connected to the MCU control chip U1.

Referring to fig. 13, the PCB voltage test module includes a twenty-second resistor R22, a twenty-third resistor R23, a twenty-fifth resistor R25, a twenty-sixth resistor R26, a twenty-second resistor R22, a twenty-fifth resistor R25, and a twenty-sixth resistor R26, wherein one end of the twenty-second resistor R22 is coupled to the 37 th pin of the MCU control module, the other end of the twenty-second resistor R22 is coupled to the 5V T1 test end of the PCB, the other end of the twenty-fifth resistor R25 is coupled to the 4V T4 test end of the PCB, the twenty-sixth resistor R26 is coupled to the 12V T5 test end of the PCB to test the operating voltage of the PCB, one end of the twenty-third resistor R23 is coupled to the thirty-fourth pin of the MCU control module, and the other end of the twenty-third resistor R23 is coupled to the a 1-test end of the PCB.

The implementation principle of the first embodiment of the application is as follows: when the PCB component is tested, the testing circuit is started, the MCU control module obtains electricity to send a switch control signal to the switch module, send a frequency starting signal to the frequency testing module, send a color temperature starting signal, send a brightness starting signal to the color temperature detection submodule 1 and the brightness detection submodule 2, send a voltage starting signal to the atomizer voltage detection module 4, send a power supply control signal to the PCB control module, and send a light starting signal and a sound starting signal to the acousto-optic prompting module.

When the switch module receives the switch control signal, the switch module sends a closing signal to enable the valve body of the electromagnetic valve to stretch out to abut against the switch component, then the switch module receives the switch control signal sent by the MCU control module again, and then the switch module sends a turn-off signal to control the electromagnetic valve to lose power.

The frequency test module detects the working frequency of the atomization piece after receiving the frequency starting signal and outputs test data to the frequency test end of the MCU control signal, the MCU control module sends the frequency test data received by the frequency test end to the display drive module, and the display drive module sends out a drive signal to display the power frequency of the atomization piece on the LCD screen.

When the color temperature detection submodule 1 receives a color temperature starting signal, the color temperature of an LED on the PCB is detected, and serial data are transmitted to the MCU control module through RS232 serial port connection; the MCU control module transmits the color temperature data to the display driving module, and the display driving module sends out a driving signal to display the color temperature data on the LCD screen.

When the brightness detection submodule 2 receives the brightness starting signal, the brightness of the LED on the PCB is detected, serial data are transmitted to the MCU control module through RS232 serial port connection, the MCU control module transmits the received brightness data to the display driving module, and the display driving module sends out a driving signal to display the brightness on the LCD display screen.

When the atomizer voltage detection module 4 receives the voltage starting signal, the working voltage of the atomizer is detected and the detection signal is sent to the MCU control module, the MCU control module converts the received voltage signal and sends the converted voltage signal to the display driving module, and the display driving module sends the driving signal to display the voltage detection result on the LCD display screen.

When the PCB control module receives the power supply control signal, the PCB is switched on, and then the working current and the voltage on the PCB can be detected.

When the sound and light prompting module receives the light starting signal, the light prompting module sends a light prompting signal to remind a worker whether the testing circuit is in a working state, and when the sound and light prompting module receives the sound starting signal, the sound prompting module sends a sound prompting signal to prompt the worker to complete various tests on the testing circuit.

In a second embodiment, the present embodiment is different from the first embodiment only in that a plurality of switch modules are provided, each switch module is coupled to one solenoid valve, and the plurality of switch modules are all coupled to the switch control signal output end of the MCU control module.

Furthermore, the plurality of switch modules are controlled to receive the switch control signals according to a preset sequence, so that the electromagnetic valve can move back and forth, and whether the switching function of the circuit board in different working states is normal or not can be tested.

The implementation principle of the second embodiment of the present application is as follows: through setting up a plurality of switch module, a plurality of switch module all receive MCU control module's control, can realize testing a plurality of switch components and parts promptly.

The third embodiment is different from the first and second embodiments only in that: the atomizer voltage detection module 4 includes a plurality of voltage test sub-modules, and a plurality of voltage test sub-modules are used for testing the operating voltage of the atomizer under different frequencies, and a plurality of voltage test sub-modules are respectively coupled to the PB1_ HPowerOn pin, the PB2_ mpower on pin and the PF11_ LPowerOn pin of the MCU control chip U1.

The third embodiment of the present application has the following implementation principle: through setting up a plurality of voltage test submodule pieces, can just detect the atomizer that works under different frequencies, whether its voltage is normal, the test effect is more comprehensive.

The foregoing is a preferred embodiment of the present application and is not intended to limit the scope of the application in any way, and any features disclosed in this specification (including the abstract and drawings) may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.

Claims

1. The utility model provides a circuit board function detects uses test circuit which characterized in that: the device comprises a power supply module, an MCU control module, a switch module, an action module and a display driving module;

2. The circuit board function test circuit according to claim 1, wherein: the switch module includes first MOS pipe Q1 and first relay K1, the grid of first MOS pipe Q1 is coupled in MCU control module's switch control signal output end, the drain-source resistance of first MOS pipe Q1 is coupled in the power module with relay K1's coil after establishing ties, the source ground of first MOS pipe Q1, relay K1 includes normally open contact switch K1-1, normally open contact switch K1-1 establishes ties in the power supply circuit of solenoid valve.

3. The circuit board function test circuit according to claim 1, wherein: the frequency test module comprises a second MOS tube Q2, a third MOS tube Q3 and a second relay K2, the second relay K2 comprises a normally open contact switch K2-1, the drain electrode of the second MOS tube Q2 is coupled to the frequency test end of the MCU control module, the drain electrode of the second MOS tube Q2 is coupled to the power supply module, the source electrode of the second MOS tube Q2 is grounded, the grid electrode of the second MOS tube Q2 is coupled to the atomizing sheet after being connected in series with the normally open contact switch K2-1, the grid electrode of the third MOS tube Q3 is coupled to the frequency start signal output end of the MCU control module, the drain electrode of the third MOS tube Q3 is coupled to the power supply module after being connected in series with the second relay K2, the source of the third MOS transistor Q3 is grounded.

4. The circuit board function test circuit according to claim 1, wherein: the LED test module comprises a color temperature detection submodule (1) and a brightness detection submodule (2), the MCU control module further comprises a color temperature starting signal output end and a brightness starting signal output end, the color temperature starting signal output end is connected to the serial signal input end of the color temperature detection submodule (1) through a serial port, the brightness starting signal output end is connected to the serial signal input end of the brightness conversion submodule through a serial port, the color temperature detection submodule (1) and the brightness detection submodule (2) are both coupled to the PCB to receive brightness and color temperature signals, the serial signal output ends of the color temperature detection submodule (1) and the brightness detection submodule (2) are coupled to the serial data receiving end of the MCU control module to output brightness and color temperature signals, and the MCU control module receives brightness, brightness and brightness signals, And outputting the color temperature signal to the display driving module.

5. The circuit board function test circuit according to claim 1, wherein: the PCB control module is coupled to the MCU control module to conduct a power supply loop between the power supply module and the positive electrode and the negative electrode of the PCB when receiving a power supply control signal sent by the MCU control module, the PCB control module comprises a fourth MOS tube Q4, a fifth MOS tube Q5, a third relay K3 and a fourth relay K4, the grid electrode of the fourth MOS tube Q4 is coupled to the MCU control module to receive the power supply control signal, the source electrode of the fourth MOS tube Q4 is grounded, the drain electrode of the fourth MOS tube Q4 is coupled to the power supply module after being connected in series with the third relay K3, the third relay K3 comprises a normally open contact switch K3-1, the normally open contact switch K3-1 is connected in series between the power supply module and the positive electrode of the PCB, the grid electrode of the fifth MOS tube Q5 is coupled to the MCU control module to receive the power supply control signal, the source of the fifth MOS transistor Q5 is grounded, the drain of the fifth MOS transistor Q5 is coupled to the power supply module after being connected in series with the fourth relay K4, the fourth relay K4 includes a normally open contact switch K4-1, and the normally open contact switch K4-1 is connected in series between the negative electrode of the PCB and the ground terminal.

6. The circuit board function test circuit according to claim 1, wherein: the power supply module comprises an electromagnetic valve power supply module, a PCB power supply module, a relay power supply module (5) and an MCU power supply module (6);

the electromagnetic valve power supply module is used for accessing 24V direct current and outputting VDD12V direct current to the electromagnetic valve so as to supply power to the electromagnetic valve; outputting the VDD12V direct current to an input end of a PCB power supply module; outputting 12V to the input end of the relay power supply module (5);

the relay power supply module (5) receives VDD12V direct current and outputs VDD5V direct current to coils of a first relay K1, a second relay K2, a third relay K3 and a fourth relay K4;

the MCU power supply module (6) is coupled to the relay power supply module (5) to receive the VDD5V direct current and output VDD3.3V direct current to the MCU control module.

7. The circuit board function test circuit according to claim 6, wherein: the power supply module also comprises an atomizer voltage detection module (4) used for testing the voltage of the atomizer on the PCB, the power supply module also comprises an atomizer power supply module (3) used for supplying power to the atomizer on the PCB, and the atomizer power supply module (3) is connected with VDD12V direct current and outputs VDDVAR direct current; the atomizer voltage detection module (4) comprises a sixth MOS tube Q6, a fifth relay K5 and a first sliding resistor VR1, wherein the grid electrode of the sixth MOS tube Q6 is coupled to the voltage starting signal output end of the MCU control module, the source electrode of the sixth MOS tube Q6 is grounded, the drain electrode of the sixth MOS tube Q6 is coupled to VDD5V direct current after being connected with the coil of the fifth relay K5 in series, the fifth relay K5 comprises a normally open contact switch K5-1, one end of the normally open contact switch K5-1 is coupled to the atomizer power supply sub-module (3) to receive VDDVR direct current, the other end of the normally open contact switch K5-1 is coupled to a fixed end of the first sliding resistor VR1, and the other fixed end of the first sliding resistor VR1 is grounded.

8. The circuit board function test circuit according to claim 6, wherein: the sound and light prompting module comprises a light emitting diode D1 which is electrified to emit red light, a light emitting diode D2 which is electrified to emit green light, a light emitting diode D1 and a light emitting diode D2 which are connected in parallel in the same direction, the anodes of the light emitting diodes D1 and D2 are coupled to the MCU power supply module (6) to obtain VDD3.3V DC power, cathodes of the light emitting diodes D1 and D2 are coupled to a light-activated signal output end of the MCU control module, when the MCU control module tests the voltage, the current, the frequency of the atomization sheet, the voltage of the atomizer or the color temperature and the brightness of the LED, the MCU control module sends out a light starting signal to conduct the light emitting diode D1, when the MCU control module completes the test of the voltage, the current, the frequency of the atomization sheet, the voltage of the atomizer or the color temperature and the brightness of the LED, the MCU control module sends out a light starting signal to conduct the light emitting diode D2.

9. The circuit board function test circuit according to claim 8, wherein: the reputation suggestion module still includes bee calling organ and first triode Q1, the one end of bee calling organ is coupled in MCU power supply sub module (6) in order to obtain VDD3.3V direct current, the other end of bee calling organ is coupled in first triode Q1's collecting electrode, first triode Q1's projecting pole ground connection, first triode Q1's base is coupled in MCU control module's sound start signal output part, and when MCU control module tested PCB board voltage, electric current, atomizing piece frequency, atomizer voltage or LED colour temperature, luminance test completion, MCU control module sent sound start signal, and first triode Q1 switches on bee calling organ and sends sound prompt signal.