Flickering xenon lamp circuit device

Abstract

The invention discloses a flashing xenon lamp circuit device, and relates to the technical field of discharge lamp ignition or control circuit devices, and the circuit device comprises an MCU, a transformer circuit, a voltage regulation unit, a sensor circuit, a voltage monitoring unit, a current monitoring unit, an OCP operational amplifier comparator, an OVP operational amplifier comparator, and an abnormity control unit. According to the detection protection module of the flashing xenon lamp circuit device provided by the invention, the circuit is cut off abnormally, so that potential safety hazards can be reduced; the triggering flexibility of the MCU is better; aiming at the PWM regulation and control unit, feedback regulation can be accurately and flexibly carried out, and the voltage value excited by the transformer and the waveform stability can be controlled; the flashing xenon lamp circuit provided by the invention can prolong the service life of the device, improve the technical level of various applications, and promote the progress and development of related industries.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit devices for igniting or controlling discharge lamps, and in particular to a circuit device for flash xenon lamps. Background Art

[0002] The light emission principle of the xenon flash lamp is based on the gas discharge phenomenon. Its working mechanism involves the following key steps: 1: Initial charging: Before use, the power supply will charge the energy storage capacitors, which can store a large amount of electrical energy. 2: Trigger pulse: When the xenon lamp needs to be lit, a high voltage trigger pulse is applied to the trigger coil or directly to the trigger point near the lamp tube. This high voltage can generate a strong electric field inside the lamp tube. 3: Ionization process: Due to the strong electric field generated by the trigger pulse, the electrons in the xenon gas will be accelerated and gain enough energy to collide with the xenon atoms, causing the electrons in the xenon atoms to be excited to a higher energy level. At the same time, collision ionization will occur, that is, the electrons will knock out the electrons in other xenon atoms, forming more free electrons and positive ions, thus starting an avalanche ionization process. 4: Discharge and luminescence: With the presence of a large number of free electrons, they will move quickly under the action of the strong electric field and frequently collide inelastically with the xenon atoms, causing the xenon atoms to continuously transition to an excited state. When the excited xenon atoms de-excite and return to the ground state or a lower energy state, photons will be released. Because xenon can emit a continuous spectrum from ultraviolet to infrared, its light appears white and very bright. 5: Continuous flash: Once the discharge channel is established, the electrical energy stored in the capacitor will be quickly released through the lamp tube, maintaining a short but strong current, resulting in instantaneous high-intensity light output. This process usually lasts from a few milliseconds to hundreds of milliseconds, depending on the specific application requirements and design parameters. 6: Cooling and recovery: After a flash ends, the temperature inside the lamp tube will gradually drop, and the gas will return to normal, ready to accept the next trigger. 7: Repeated work: For applications that require continuous work, the above process will be repeated at set time intervals.

[0003] Xenon lamp circuit devices are widely used in industry, medical treatment, scientific research, laboratories and other fields. However, the existing xenon lamp circuit devices have poor triggering flexibility, unstable waveforms, and certain safety hazards due to the lack of detection and protection modules, abnormal cut-off circuits, MCU control and communication circuits, etc., which can easily cause damage to the xenon lamp. Summary of the invention

[0004] In view of this, the present invention provides a xenon flash lamp circuit device, which has a compact circuit structure, good stability, high safety, and can extend the service life of the circuit device.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a flash xenon lamp circuit device, the device comprising: an MCU, a transformer circuit, a voltage regulating unit, a sensor circuit, a voltage monitoring unit, a current monitoring unit, an OCP operational amplifier comparator, an OVP operational amplifier comparator and an abnormal control unit; Among them, the voltage monitoring unit specifically includes: the output voltage V1 after conversion and rectification by the transformer circuit, after voltage division by 6 identical resistors R19, R21, R24, R28, R31, R33 and another different resistor R37, generates a voltage V2 at the connection between the resistors R33 and R37, the operational amplifier U5 is used for voltage following, the positive input terminal of U5 inputs the voltage V2, the negative input terminal is connected to the output terminal of U5, the voltage V2 is followed to OVP_AOUT, and output to the OVP operational amplifier comparator.

[0006] Furthermore, the current monitoring unit specifically includes: J1 is a schematic package of a flash xenon lamp L4642, with a total of 9 pins, of which pin 9 is a cathode, and pin 9 is grounded through a sampling resistor R4. When the flash xenon lamp is working, the positive and negative input terminals of the precision instrument amplifier U1 are connected to the two ends of the acquisition resistor R4, which is used to collect the voltage value across R4 and amplify the collected voltage value; U2 is used for voltage following, and the voltage divided by the power supply voltage VDD_3V3 of U2 through resistors R12 and R13 is followed to pin 5 of U1, which is used as the reference voltage when U1 is working; one end of the capacitor C22 and C18 are respectively connected to the power supply terminal of U2 and U1, and the other end is grounded for power supply filtering; U1 The other two input ends of are connected through the external gain resistor R10; R9 is connected between the negative input end of U1 and one end of the resistor R4, one end of the capacitor C19 is connected between the negative input end of U1 and one end of the resistor R9, and the other end is grounded, R11 is connected between the positive input end of U1 and the other end of the resistor R4, one end of the capacitor C21 is connected between the positive input end of U1 and one end of the resistor R11, and the other end is grounded, and the R9, C19, R11 and C21 constitute a low-pass filter for providing good RFI suppression for the circuit; one end of the C19 is connected to one end of the C21 through the common-mode suppression capacitor C20; after being followed by U2, the output OCP_AOUT is output to the OCP op amp comparator.

[0007] Furthermore, the OCP op amp comparator specifically includes: PWM_OCP is connected to the IO port of the MCU for receiving the PWM waveform signal output by the MCU, and the other end of PWM_OCP is connected to the base of the transistor Q1 for controlling the rapid on and off of the transistor Q1; the VDD_8V pull-up voltage is used to provide a voltage source for Q1, and the emitter of Q1 is grounded; one end of the resistor R15 is connected to the voltage source, and the other end is connected to the collector of Q1; one end of the resistor R17 is connected to the collector of Q1, and the other end is connected to one end of the resistor R18; an adjustable voltage is generated at the resistors R15 and R17, and the voltage value is determined by the duty cycle of the PWM waveform signal; the other end of the resistor R18 is connected to the negative input end of the comparison operational amplifier U3A; one end of the capacitor C30 is connected between the resistors R17 and R18, and the other end is grounded; one end of the capacitor C31 is connected between R18 and the negative input end of U3A. The other end is grounded; R17, R18, C30, and C31 constitute a π-type filtering circuit; one end of the pull-down resistor R23 is connected between the capacitor C31 and the negative input terminal of U3A, and the other end is grounded; one end of the pull-down resistor R25 is connected to the base of Q1, and the other end is grounded; the MCU controls the voltage value of the inverting input terminal of U3A by changing the duty cycle of the output waveform of the IO port, and the positive input terminal of U3A is connected to the current monitoring unit to collect the output OCP_AOUT; the capacitor C28 is connected between the power supply terminal of U3A connected to the positive voltage and the ground for power supply filtering; one end of the pull-up resistor R16 is connected between the output terminal of U3A and one end of the resistor R19, and the other end is connected to another voltage source for outputting a high-level voltage; the other end of the current limiting resistor R19 outputs OCP_Interrupt, and the OCP_Interrupt is output to the IO port of the MCU and the abnormal control unit.

[0008] Furthermore, the OVP op amp comparator specifically includes: PWM_OVP is connected to the IO port of the MCU for receiving the PWM waveform signal output by the MCU, and the other end of PWM_OVP is connected to the base of the transistor Q3 for controlling the rapid on and off of the transistor Q3; the VDD_8V pull-up voltage is used to provide a voltage source for Q3, and the emitter of Q3 is grounded; one end of the resistor R29 is connected to the voltage source, and the other end is connected to the collector of Q3; one end of the resistor R31 is connected to the collector of Q3, and the other end is connected to one end of the resistor R32; an adjustable voltage is generated at the resistors R29 and R31, and the voltage value is determined by the duty cycle of the PWM waveform signal; the other end of the resistor R32 is connected to the negative input end of the comparison operational amplifier U3B; one end of the capacitor C32 is connected between the resistors R31 and R32, and the other end is grounded; one end of the capacitor C33 It is connected between R32 and the negative input terminal of U3B, and the other end is grounded; R31, R32, C32, and C33 constitute a π-type filter circuit; one end of the pull-down resistor R35 is connected between the capacitor C33 and the negative input terminal of U3B, and the other end is grounded; one end of the pull-down resistor R36 is connected to the base of Q3, and the other end is grounded; the MCU controls the voltage value of the inverting input terminal of U3B by changing the duty cycle of the output waveform of the IO port, and the positive input terminal of U3B is connected to the voltage monitoring unit to collect the output OVP_AOUT; one end of the pull-up resistor R30 is connected between the output terminal of U3B and one end of the resistor R33, and the other end is connected to another voltage source, which is used to output a high-level voltage; the other end of the current limiting resistor R33 outputs OVP_Interrupt, and the OVP_Interrupt is output to the IO port of the MCU and the abnormal control unit.

[0009] Furthermore, the abnormal control unit specifically includes: U6 and U7 are two identical OR gate logic integrated circuits, each including 5 pins, U6 pin 1 is connected to OVP_Interrupt, U6 pin 2 is connected to OCP_Interrupt, U6 pin 3 is grounded, when overvoltage or overcurrent occurs, or both occur at the same time, U6 pin 4 outputs a high level, otherwise it outputs a low level and inputs to the next OR gate U7 pin 1, U6 pin 5 is connected to a voltage source, one end of a capacitor C48 is connected between the voltage source and pin 5, and the other end of C48 is connected to the capacitor C48. One end is grounded; Pin 2 of U7 is connected to the Timer_OUT square wave signal, which is the trigger signal of the subsequent starting circuit and is directly output by the MCU. Pin 1 of U7 receives a high level in the event of overcurrent or overvoltage. Regardless of whether the Timer_OUT square wave signal is high or low, the Alert_Ctr signal output by pin 4 of U7 is high; Pin 3 of U7 is grounded, and Pin 5 is connected to a voltage source. One end of capacitor C37 is connected between the voltage source and Pin 5, and the other end of C37 is grounded.

[0010] Furthermore, the transformer circuit specifically includes: the Alert_Ctr signal is output to the base of the PNP transistor through a current limiting resistor R12, the collector of the PNP transistor is connected between the current limiting resistor R11 and the gate of the NMOS transistor Q2, the emitter of the PNP transistor is grounded, and when Alert_Ctr is at a high level, the PNP transistor is turned on; one end of the pull-down resistor R15 is connected between R12 and the base of the PNP transistor, and the other end of R15 is grounded; the gate of the NMOS transistor Q2 is connected to a current limiting resistor R11, the drain of Q2 is connected to the 7th pin of a transformer, and the source is grounded through a current limiting resistor R16; the voltage between the gate and the source of the NMOS tube Q2 is not enough to turn on Q2, the input end of the transformer is open, and the output is cut off; the transformer includes 8 pins, pins 1, 5 and 8 are not connected, pin 6 is connected to the voltage VIN, pin 4 outputs the voltage through two rectifier diodes D2 and D3, and pin 2 is grounded; voltage regulator diodes D6 and D7 are connected in series, the other end of D7 is grounded, and the other end of D6 is connected between D3 and the voltage output end, and connected to a voltage source; When there is no overvoltage or overcurrent, the 4th pin of U6 outputs a low level. At this time, the output Alert_Ctr of U7 is the level of Timer_OUT. This signal is the trigger signal of the subsequent ignition circuit. The high level enables it. At the same time, at the high level, the transformer circuit conversion output is turned off. The lighting of the flashing xenon lamp requires capacitor charging and discharge ionization. When Timer_OUT is a low level, the 3rd pin of the transformer outputs VCC6 through two rectifier diodes D4 and D5 to charge the subsequent capacitor and trigger the optocoupler to turn off. When Timer_OUT is a high level, the transformer circuit conversion output is cut off, triggering the optocoupler to turn on, and the subsequent capacitor begins to discharge, generating a kilovolt voltage through the trigger coil to ionize the xenon gas and emit light.

[0011] Further, the sensor circuit specifically includes temperature detection, light detection and tipping detection sensor circuits; Wherein, the temperature detection sensor circuit includes a temperature detection sensor RP1, which exhibits different resistance values ​​at different ambient temperatures. After voltage division with R1, the 11th pin of the MCU detects different voltages and then calculates the ambient temperature through a formula; The light detection sensor circuit includes a light detection sensor RL1, which exhibits different resistance values ​​under different light conditions. After voltage division with R8, the MCU's 7-pin detects different voltages and then calculates the ambient light intensity through a formula; The tipping detection sensor circuit includes a tipping sensor R3, which is used to detect whether the device has tipped over to prevent dust contamination or optical path deviation. The R3 is a hollow sealed metal tube. There is a welding foot at each end of the metal tube, one is gold and the other is silver. There are two steel columns inside. When the steel column rolls to the gold end, the metal tube is turned on. When it rolls to the silver end, the metal tube is open. After voltage division with R2 and combined with the voltage source VIN, the 6th pin of the MCU detects different level states for detecting the placement state of the device.

[0012] Furthermore, the MCU specifically includes 32 pins, pins 1, 5 and 17 are connected to a voltage source respectively, one end of capacitors C43, C46 and C47 are connected between pins 1, 5 and 17 and the voltage source respectively, the other ends of C43, C46 and C47 are all grounded, one end of capacitor C44 is also connected between pin 1 and C43, the other end of C44 is grounded, and C43, C44, C46 and C47 are used for MCU power supply filtering; pins 16 and 32 are grounded; pin 31 is connected to a BOOT circuit, and the BOOT circuit includes resistors R38 and R39 connected in series, the other end of R38 is connected to a voltage source, and the other end of R39 is grounded , pin 31 is connected between R38 and R39, and is used for level control during program burning; U10 is a monitoring and reset chip, including 5 pins, pin 1 is connected to pin 4 of the MCU, and automatically resets when powered on. At the same time, a manual reset circuit is designed, pin 3 is connected to one end of switch SW1, and the other end of SW1 is grounded. It is controlled by the touch switch of SW1, one end of capacitor C45 is connected to pin 3 of U10, and the other end is connected to the other end of SW1, and C45 is used for jitter waveform filtering; pin 5 of U10 is connected to a voltage source, pin 2 is grounded, and a capacitor C42 is connected between pin 5 and pin 2, and C42 is used for U10 power supply filtering; MCU Pin 2 is connected to the oscillation signal OSC_IN, and pin 3 outputs the oscillation signal OSC_OUT; pins 26-30 are short-circuited; pins 14 and 15 of the MCU are overcurrent and overvoltage interrupt trigger ports, pin 14 is connected to OCP_Interrupt, and pin 15 is connected to OVP_Interrupt; pins 23 and 24 of the MCU are respectively connected to pins 2 and 3 of the 4X1 pin header J3 for program burning, pin 1 of the 4X1 pin header J3 is connected to the voltage source, and pin 4 of the 4X1 pin header J3 is grounded; pins 6, 7 and 11 of the MCU are respectively connected to the tipping detection, light detection and temperature detection sensor circuits, and pin 8 is connected to the overcurrent detection, light detection and temperature detection sensor circuits. Pins 10 and 12 are 485 debugging ports, pin 13 and 18 are PWM waveform output ports for OCP op amp comparator and OVP op amp comparator, pins 19 and 20 are timer signal ports for controlling the generation of Timer_OUT signal, pin 21 is the output of Alert_OUT alarm signal, pin 25 is the direct output port of Timer_OUT signal, and pin 22 is connected to light-emitting diode LED2 or LED1, LED2 is used for program debugging, and LED1 is a power indicator light.

[0013] Furthermore, the voltage regulating unit specifically includes: one end of the filter capacitor C26 is connected to the voltage VTTC divided by the potentiometer, and the other end is grounded; one end of the voltage dividing resistor R23 is connected between one end of C26 and the voltage VTTC, and the other end of R23 is connected in series to one end of the voltage dividing resistor R30, and the other end of R30 is grounded; one end of the filter capacitor C22 is connected between the series resistors R23 and R30, and the other end is grounded; U4A together with R27 and C21 constitute an operational amplifier proportional integral circuit, and the resistor R27 and the capacitor C21 are connected in series to the U4A negative feedback circuit, that is, Pin 2 of the negative input terminal of U4A is connected to pin 1 of the output terminal; one end of R25 is the collection point of the transformer output voltage and is connected to one end of C22. The voltage of the other end of R25 is sent to the negative input terminal of U4A in one way and to the positive input terminal of U4A in the other way through diode D14. When the voltage of pin 3 of the positive input terminal changes, the voltage value of the output terminal of U4A will change accordingly; the positive pole of diode D15 is connected to pin 3 of U4A, and the negative pole is connected to the other end of R25. D14 and D15 are diodes used to limit the common-mode input voltage range of the operational amplifier as an unloading path. Avoid damaging the operational amplifier; the positive electrode of the voltage stabilizing diode D13 is grounded, and the negative electrode is connected to the other end of the R25; one power supply terminal of U4A is connected to a positive voltage, and the other power supply terminal is grounded; the power supply filter capacitors C19 and C17 are connected in parallel to the positive power supply terminal of U4A, and the other ends of C19 and C17 are both grounded; a current limiting resistor R32 is connected in series to the output end of U4A, and the other end of R32 is connected to the base of the PNP transistor Q6; one end of the pull-down resistor R36 is connected between the other end of R32 and the base of Q6, and the other end is grounded; the emitter of Q6 is grounded, and the collector of Q6 is connected to The FB pin of the flyback switching regulator chip U3 is connected to the output of an error amplifier inside U3, and is also connected to the non-inverting input of the PWM generator. The non-inverting end of the error amplifier is a reference voltage, the inverting end is grounded, and the output end is a positive saturation voltage. The output end of the error amplifier has a certain internal resistance. When the CE path current of Q6 changes, the voltage of the FB pin will fluctuate dynamically and be transmitted to the non-inverting input of the PWM generator, affecting the output duty cycle of the flyback switching regulator chip U3, and then affecting the voltage value of the transformer output end.

[0014] Compared with the prior art, the flash xenon lamp circuit device provided by the present application includes a detection and protection module, such as the detection of voltage and current in the circuit, the illumination when the discharge lamp is emitting light, temperature detection and the tipping detection of the device; the circuit includes an abnormal cut-off circuit, which can reduce safety hazards; the circuit includes an MCU control and communication circuit, and has good triggering flexibility; the circuit is for a PWM control unit, can accurately and flexibly perform feedback adjustment, and can easily control the voltage value and waveform stability excited by the transformer.

[0015] Xenon flash lamps are of great significance in many fields, and their applications are wide and diverse. This application provides a xenon flash lamp circuit device from the perspective of being more convenient, more efficient, more flexible, and safer, which can extend the service life of the xenon lamp device, improve the technical level of various applications, and promote the progress and development of related industries. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the voltage monitoring unit; Figure 2 is a schematic diagram of the structure of the current monitoring unit; Figure 3 This is the schematic diagram of the OCP op amp comparator structure; Figure 4 This is the schematic diagram of the OVP op amp comparator structure; Figure 5 It is a schematic diagram of the structure of the abnormal control unit; Figure 6 It is a schematic diagram of the transformer structure; Figure 7 is a schematic diagram of the sensor circuit structure; Figure 8 It is a schematic diagram of the MCU structure; Fig. 9 is a schematic diagram of the voltage regulating unit structure; Fig.10 It is a schematic diagram of the structure of the flyback switching regulator chip U3; Fig.11 1 is an overall circuit diagram of a xenon flash lamp circuit device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention, so as to more clearly understand the purposes, features and advantages of the present invention. It should be understood that the embodiments shown in the drawings are not limitations on the scope of the present invention, but are only intended to illustrate the essential spirit of the technical solutions of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the present invention.

[0018] Unless the context requires otherwise, throughout the specification and claims, the word "comprise" and variations such as "include" and "have" should be construed in an open, inclusive sense, ie, should be interpreted as "including, but not limited to."

[0019] References throughout the specification to "one embodiment" or "an embodiment" indicate that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of "in one embodiment" or "in an embodiment" in various places throughout the specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any manner in one or more embodiments.

[0020] As used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and / or" unless the context clearly dictates otherwise.

[0021] In the following description, in order to clearly show the structure and working mode of the present invention, many directional words will be used for description, but the words "front", "back", "left", "right", "outside", "inside", "outward", "inward", "up", "down", etc. should be understood as convenient terms and should not be understood as restrictive terms.

[0022] The implementation details of the embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following content is only provided for easy understanding of the implementation details and is not necessary for implementing the present solution.

[0023] In order to solve the shortcomings of the prior art and achieve the purpose of the invention, the present invention provides a flash xenon lamp circuit device, which includes: a xenon lamp, an RS232 interface unit, an MCU, a ignition control unit, a ignition circuit, a PWM generation unit, a transformer, a capacitor energy storage unit, a voltage regulation unit, a sensor circuit, an energy discharge unit, a voltage monitoring unit, a current monitoring unit, an OCP operational amplifier comparator, an OVP operational amplifier comparator and an abnormality control unit; wherein the sensor circuit includes light detection, temperature detection and tipping detection sensor circuits.

[0024] Next, various modules of the xenon flash lamp circuit device will be described in detail with reference to the accompanying drawings.

[0025] In some embodiments, the process of lighting up the flash xenon lamp is divided into different stages. A very high voltage is required during ionization, and a certain value of current will exist after stabilization. In order to extend the service life of the xenon lamp device as much as possible and for safe use, the circuit device is provided with an overvoltage detection protection circuit and an overcurrent detection protection circuit, wherein the overvoltage detection protection circuit includes Figure 1 The voltage monitoring unit and Figure 4 The OVP op amp comparator, overcurrent detection protection circuit includes Figure 2 The current monitoring unit and Figure 3 OCP op amp comparator.

[0026] like Figure 1 The figure shows the schematic diagram of the voltage monitoring unit. V_600V is the output voltage after the transformer conversion and rectification. After being divided by six 640K ohm resistors and one 10K ohm resistor, a voltage of about 2.9V will be generated at the connection of R33 and R37. The operational amplifier U5 is used for voltage following here, and the capacitor C24 is used for power supply filtering. The 2.9V voltage is followed to OVP_AOUT and output to the OVP operational amplifier comparator, as shown in the figure. Figure 4 shown.

[0027] like Figure 2 The current monitoring unit is shown. J1 is the schematic package of the flash xenon lamp L4642, with a total of 9 pins, of which pin 9 is the cathode. R4 is connected here for sampling resistance. When the flash xenon lamp is working, there is a certain value of current in the path where the sampling resistor R4 is located. According to Ohm's law, a certain value of voltage drop will be generated at both ends of R4. U1 is a precision instrument amplifier, which is used to collect the voltage value at both ends of R4 and amplify it according to the design. Here it is amplified 1001 times. For example, if the voltage drop across R4 is 1uV, OCP_AOUT will output a voltage value of 1001uV. U2 is used for voltage following here, and the voltage of VDD_3V3 divided by R12 and R13 is followed to pin 5 of U1, which is used as the reference voltage when U1 is working. Capacitors C22 and C18 are used for power supply filtering, R10 is the external gain resistor of U1, R9 and C19 (as well as R11 and C21) form a low-pass filter to provide good RFI suppression for the circuit, and C20 is a common-mode suppression capacitor. OCP_AOUT outputs to the OCP op amp comparator, such as Figure 3 .

[0028] like Figure 3 , 4 The following are the OCP op amp comparator and OVP op amp comparator. PWM_OCP and PWM_OVP are connected to the IO port of the microcontroller (see Figure 8 ), used to receive the PWM waveform signal output by the microcontroller, control the rapid conduction and shutdown of Q1 and Q3, VDD_8V pull-up voltage is used to provide a voltage source. Under the control described above, the circuit in the figure above will generate an adjustable voltage at R15 and R17 (R29 and R31). The specific voltage value is determined by the duty cycle of the PWM wave. R17, R18, C30, C31 (R31, R32, C32, C33) are π-type filter circuits, and R23 and R25 are pull-down resistors. Through such a circuit, the microcontroller can control the voltage value of the inverting input terminal of the comparison operational amplifier U3A and the comparison operational amplifier U3B by changing the duty cycle of the output waveform of the IO port. OCP_AOUT and OVP_AOUT are Figure 2 and Figure 1In the acquisition output, C28 is used for power supply filtering, R16 and R30 are pull-up resistors for passing high-level voltage for the output, and R19 and R33 are current limiting resistors.

[0029] The function of the overvoltage detection protection circuit and the overcurrent detection protection circuit is to set the threshold of overvoltage protection and overcurrent protection. When the voltage and current of the flash xenon lamp exceed the set threshold, the level of U3A and U3B will be reversed and output to the MCU IO port through OVP_Interrupt and OCP_Interrupt (see Figure 8 ) and abnormal control unit (see Figure 5 ).

[0030] In some embodiments, Figure 5 The figure shows an abnormal control unit, which is used to skip the code control of the single-chip microcomputer MCU. When the voltage or current is abnormal, the input path of the transformer is directly disconnected through the hardware circuit, so as to achieve the purpose of cutting off the power supply of the flash xenon lamp.

[0031] U6 and U7 are two identical OR gate logic integrated circuits. When overvoltage or overcurrent occurs, or both occur at the same time, U6's 4-pin outputs a high level, otherwise it outputs a low level and is input to the next OR gate U7's input terminal (1-pin). U7's 2-pin is another input terminal, connected to Timer_OUT. This signal is the trigger signal of the subsequent ignition circuit and is directly output by the microcontroller (see Figure 8 ), which can also be output by the timer circuit. This is a square wave signal. Since the 1st pin of U7 receives a high level in the case of overcurrent or overvoltage, no matter whether the square wave signal is high or low at this time, the 4th pin of U7 outputs a high level, that is, the Alert_Ctr (alarm control) signal. Figure 6 The transformer circuit shown is connected to the base of a PNP transistor. When Alert_Ctr is at a high level, Q3 is turned on and Q2 is an NMOS tube. At this time, the voltage between the gate and the source of Q2 is not enough to turn on Q2. The input end of the transformer is open and the output is cut off.

[0032] When there is no overvoltage or overcurrent, the 4th pin of U6 outputs a low level. At this time, the output of U7 (Alert_Ctr) is completely equivalent to the level of Timer_OUT. This signal is the trigger signal of the subsequent ignition circuit. The high level enables it. At the same time, when the level is high, the transformer conversion output is turned off. In short, the lighting of the flashing xenon lamp requires two parts to complete, capacitor charging and discharge ionization. When Timer_OUT is a low level, the transformer output VCC6 charges the subsequent capacitor and triggers the optocoupler to turn off; when Timer_OUT is a high level, the transformer conversion output is cut off, triggering the optocoupler to turn on, and the subsequent capacitor begins to discharge, generating a kilovolt voltage through the trigger coil to ionize the xenon gas and emit light.

[0033] exist Figure 6 In the circuit, R11, R12 and R16 are used for current limiting, R15 is a pull-down resistor, D2, D3, D4, D5 are used for rectification, and D6 and D7 are used for voltage stabilization.

[0034] In some embodiments, considering that the present solution may be used in a variety of occasions, a set of sensor circuits is designed in the xenon lamp circuit device to detect the environmental parameters and usage status around the xenon lamp. Figure 7 As shown in the figure, the temperature detection, light detection and tipping detection sensor circuit. Among them, RP1 is a temperature detection sensor, which shows different resistance values ​​at different ambient temperatures. After voltage division with R1, the PA5 port (pin 11) of the microcontroller detects different voltages and then calculates the ambient temperature through the formula.

[0035] RL1 is a light detection sensor, and its working principle is similar to that of the temperature detection sensor. Under different lighting conditions, it exhibits different resistance values. After voltage division with R8, the PA1 port (pin 7) of the microcontroller detects different voltages and then calculates the ambient light intensity through a formula.

[0036] R3 is a tipping sensor, which is used to detect whether the substrate (or product) is tipped over to prevent dust contamination or optical path deviation. It is a hollow sealed metal tube with a welding foot at each end of the metal tube, one is gold and the other is silver. There are two steel columns inside. When the steel column rolls to the gold end, the tube is conductive, and when it rolls to the silver end, the tube is open. It is matched with R2 and combined with VIN. The PA0 port (6th pin) of the microcontroller will detect different electrical level states. The PCB layout can be planned according to the product usage environment and sensor characteristics, and the product placement status can be detected.

[0037] In some embodiments, in order to more flexibly adjust the excitation frequency of the xenon lamp and read the working information, as well as control other circuits, the xenon lamp circuit configuration also designs a (single-chip microcomputer) controller unit MCU. The circuit is as follows: Figure 8As shown. 3.3V working voltage, R38 and R39 are BOOT circuits, used for level control during program burning; U10 is a monitoring and reset chip, which automatically resets when powered on. At the same time, a manual reset circuit is designed, which is controlled by the SW1 touch switch. C45 is used for jitter waveform filtering, C42 is used for U10 power filtering, and C43, C44, C46, ​​and C47 are used for microcontroller power filtering; J3 is a 4X1 pin header, used for program burning, using pins 23 and 24; LED2 and LED1 are light-emitting diodes, the former is used for program debugging, and the latter is a power indicator ; Pins 14 and 15 are overcurrent and overvoltage interrupt trigger ports; Pins 8 and 9 are 485 debug ports; Pin 10 is the external ignition control signal input receiving port; Pin 12 is the watchdog signal output, which is given to the monitoring and reset chip; Pins 13 and 18 are PWM waveform output ports, used for OCP op amp comparator and OVP op amp comparator; Pins 19 and 20 are timer signal ports, used to control the generation of Timer_OUT signal; Pin 21 is the output of Alert_OUT alarm signal; Pin 25 is the direct output of Timer_OUT signal.

[0038] In some embodiments, the high voltage value that excites the xenon lamp to light up has a great influence on the operating state of the xenon lamp, including the xenon lamp's startup stability, light intensity, spectrum, service life, energy conversion efficiency, maintaining output stability and consistency, and safety performance, etc. Therefore, the present solution also includes a voltage regulating unit for adjusting the output voltage amplitude and waveform stability of the transformer's rear stage. The circuit is as follows Fig. 9 shown.

[0039] like Fig. 9 The figure shows the voltage regulating unit. VTTC is the voltage divided by the potentiometer, ranging from 1V3 to 2V3. C26 is a filter capacitor, C19 and C17 are power filter capacitors, D14 and D15 are diodes used to limit the common-mode input voltage range of the op amp as an unloading path to avoid damaging the op amp; R23 and R30 are voltage-dividing resistors, taking 33 / 34 of the VTTC voltage as a reference voltage; C22 is a filter capacitor, and D13 is a voltage-stabilizing diode; U4A together with R27 and C21 constitute an op amp proportional integral circuit, and the right side of R25 is the transformer output voltage. The two voltages are sent to the inverting output and the non-inverting output of the op amp respectively at the collection point (at about 2.9V voltage). When the voltage at pin 3 of the op amp changes (that is, when the voltage value at the output of the transformer changes), the voltage value at the output of the op amp will change accordingly after passing through the proportional integral circuit. R32 is a current limiting resistor, and R36 is a pull-down resistor, which in turn affects the current between the base and the emitter of Q6 (PNP transistor). Q6 works in the amplification area. The current change between BE will affect the current between CE. The collector of Q6 is connected to the FB pin of the flyback switching regulator chip U3, as shown in Figure 2. Fig.10This is the internal block diagram of U3. Inside U3, the FB pin is connected to the output of an error amplifier and the non-inverting input of the PWM generator. The non-inverting end of the error amplifier is a reference voltage of 0.52V and the inverting end is grounded, so the output is close to the positive saturation voltage. The output of the error amplifier has a certain internal resistance. When the CE path current of Q6 changes, the voltage at the FB point will fluctuate dynamically and be transmitted to the non-inverting input of the PWM generator, affecting the output duty cycle of the flyback switching regulator chip U3, and then affecting the voltage value at the output of the transformer.

[0040] In summary, when the voltage at pin 3 of the op amp changes, the FB pin shows different voltage values, which in turn affects the parameter input of the PWM generator and adjusts the output duty cycle, ultimately to keep the output of the transformer within a set range.

[0041] Another significance of this circuit is that the reference voltage is adjustable, so that the output voltage value at the output end of the transformer can be flexibly adjusted.

[0042] The overall circuit of the xenon flash lamp circuit device is as follows Fig.11 shown.

[0043] The working principle of this circuit is: The RS232 interface unit is the only unit that interacts with the outside world, and has customized fault alarm signal output, ignition control signal input, 485 communication, and 12V power input pins. The fault alarm signal is used to convey abnormal information to the outside world, and the user can customize the peripherals; the ignition control signal is a square wave with a certain number of cycles, which can be output by the MCU to the ignition control unit, or input by the user from the outside world; 485 communication is used for the device to exchange information with the outside world; the 12V power supply is used to provide energy supply for all operating units of the device, and through the DCDC and LDO unit topology, 3.3V, 8V and adjustable output VTTC power supplies are supplied to different operating units respectively.

[0044] When the power supply is normal, the PWM generating unit outputs a high-frequency voltage stabilization control signal, converts the input end of the step-up transformer into an AC signal, and outputs a 600V AC high voltage at the output end through the transformer, which is then rectified into a DC signal by a diode to store energy for the large capacitor as the main discharge voltage to provide continuous energy for the xenon lamp. And a VCC6 DC voltage is output through voltage division and rectification. The output voltage value of the step-up transformer can be controlled by the voltage regulating unit to stabilize it within a certain range.

[0045] The MCU or the outside world can output a signal to control the photoelectric relay, and output a square wave signal through the timer module. This square wave signal is applied to the ignition control unit. The working principle of the ignition circuit is: in the low-level state, VCC6 charges the capacitor, and in the high-level state, the capacitor begins to discharge, and outputs an ultra-high voltage ignition voltage through the trigger coil, which is transmitted to the xenon lamp to generate a complete discharge arc; at the same time, this square wave signal is applied to the transistor gate of the PWM output stage through the ignition control unit to control the generation of the AC signal at the input end of the step-up transformer, so that the capacitor energy storage unit performs interval charging to achieve the purpose of flashing.

[0046] The MCU unit is equipped with light detection, temperature detection and tipping detection sensor circuits to detect environmental parameters during the operation of the xenon lamp and flexibly adjust the working status of the product according to the product's usage scenario.

[0047] When the xenon lamp is not working, the voltage of the capacitor energy storage unit is discharged to the ground through the energy discharge unit to avoid potential energy hazards.

[0048] During the operation of the xenon lamp, the voltage and current monitoring units detect the voltage and current in the circuit. The MCU can customize the voltage and current thresholds, and compare them through the OCP and OVP op amp comparators to output the logic level. The abnormal control unit integrates the level logic. When the voltage or current is abnormal, the PWM generation unit is disconnected, causing the step-up transformer output to fail, thereby achieving the purpose of protection.

[0049] The flash xenon lamp circuit device of the present application is of great significance in many fields, and its application is wide and diverse. The present invention aims to provide a flash xenon lamp circuit device from a more convenient, more efficient, more flexible and safer perspective, which can extend the service life of the xenon lamp device, improve the technical level of various applications, and promote the progress and development of related industries.

[0050] Although the present invention has been described in detail by referring to the accompanying drawings and in combination with the preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and essence of the present invention, a person of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and these modifications or substitutions shall be within the scope of the present invention or any person skilled in the art who is familiar with the present invention may easily think of changes or substitutions within the technical scope disclosed by the present invention, and shall be within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be subject to the scope of protection of the claims.

Claims

1. A xenon flash lamp circuit device, characterized in that: The device includes: an MCU, a transformer circuit, a voltage regulating unit, a sensor circuit, a voltage monitoring unit, a current monitoring unit, an OCP operational amplifier comparator, an OVP operational amplifier comparator and an abnormal control unit; Among them, the voltage monitoring unit specifically includes: the output voltage V1 after conversion and rectification by the transformer circuit, after voltage division by 6 identical resistors R19, R21, R24, R28, R31, R33 and another different resistor R37, generates a voltage V2 at the connection between the resistors R33 and R37, the operational amplifier U5 is used for voltage following, the positive input terminal of U5 inputs the voltage V2, the negative input terminal is connected to the output terminal of U5, the voltage V2 is followed to OVP_AOUT, and output to the OVP operational amplifier comparator.

2. A xenon flash lamp circuit device according to claim 1, characterized in that: The current monitoring unit specifically includes: J1 is the schematic package of the flash xenon lamp L4642, with a total of 9 pins, of which pin 9 is the cathode, and pin 9 is grounded through a sampling resistor R4. When the flash xenon lamp is working, the positive and negative input terminals of the precision instrument amplifier U1 are connected to the two ends of the acquisition resistor R4, which is used to collect the voltage value across R4 and amplify the collected voltage value; U2 is used for voltage following, and the voltage divided by the power supply voltage VDD_3V3 of U2 through resistors R12 and R13 is followed to pin 5 of U1, which is used as the reference voltage when U1 is working; one end of the capacitor C22 and one end of the capacitor C18 are respectively connected to the power supply end of U2 and U1, and the other end is grounded for power supply filtering; the other two ends of U1 are connected to the power supply end of U2 and U1, and the other end is grounded for power supply filtering; The input end is connected through an external gain resistor R10; R9 is connected between the negative input end of U1 and one end of the resistor R4, one end of the capacitor C19 is connected between the negative input end of U1 and one end of the resistor R9, and the other end is grounded, R11 is connected between the positive input end of U1 and the other end of the resistor R4, one end of the capacitor C21 is connected between the positive input end of U1 and one end of the resistor R11, and the other end is grounded, and the R9, C19, R11 and C21 constitute a low-pass filter for providing good RFI suppression for the circuit; one end of the C19 is connected to one end of the C21 through the common mode suppression capacitor C20; after being followed by U2, OCP_AOUT is output to the OCP op amp comparator.

3. A xenon flash lamp circuit device according to claim 2, characterized in that: The OCP op amp comparator specifically includes: PWM_OCP is connected to the IO port of the MCU for receiving the PWM waveform signal output by the MCU, and the other end of PWM_OCP is connected to the base of the transistor Q1 for controlling the rapid on and off of the transistor Q1; the VDD_8V pull-up voltage is used to provide a voltage source for Q1, and the emitter of Q1 is grounded; one end of the resistor R15 is connected to the voltage source, and the other end is connected to the collector of Q1; one end of the resistor R17 is connected to the collector of Q1, and the other end is connected to one end of the resistor R18; an adjustable voltage is generated at the resistors R15 and R17, and the voltage value is determined by the duty cycle of the PWM waveform signal; the other end of the resistor R18 is connected to the negative input end of the comparison operational amplifier U3A; one end of the capacitor C30 is connected between the resistors R17 and R18, and the other end is grounded; one end of the capacitor C31 is connected between R18 and the negative input end of U3A, The other end is grounded; R17, R18, C30, and C31 constitute a π-type filtering circuit; one end of the pull-down resistor R23 is connected between the capacitor C31 and the negative input end of U3A, and the other end is grounded; one end of the pull-down resistor R25 is connected to the base of Q1, and the other end is grounded; the MCU controls the voltage value of the inverting input end of U3A by changing the duty cycle of the output waveform of the IO port, and the positive input end of U3A is connected to the current monitoring unit to collect the output OCP_AOUT; the capacitor C28 is connected between the power supply end of U3A connected to the positive voltage and the ground for power supply filtering; one end of the pull-up resistor R16 is connected between the output end of U3A and one end of the resistor R19, and the other end is connected to another voltage source for outputting a high-level voltage; the other end of the current limiting resistor R19 outputs OCP_Interrupt, and the OCP_Interrupt is output to the IO port of the MCU and the abnormal control unit.

4. A xenon flash lamp circuit device according to claim 1, characterized in that: The OVP op amp comparator specifically includes: PWM_OVP is connected to the IO port of the MCU for receiving the PWM waveform signal output by the MCU, and the other end of PWM_OVP is connected to the base of the transistor Q3 for controlling the rapid on and off of the transistor Q3; the VDD_8V pull-up voltage is used to provide a voltage source for Q3, and the emitter of Q3 is grounded; one end of the resistor R29 is connected to the voltage source, and the other end is connected to the collector of Q3; one end of the resistor R31 is connected to the collector of Q3, and the other end is connected to one end of the resistor R32; an adjustable voltage is generated at the resistors R29 and R31, and the voltage value is determined by the duty cycle of the PWM waveform signal; the other end of the resistor R32 is connected to the negative input end of the comparison operational amplifier U3B; one end of the capacitor C32 is connected between the resistors R31 and R32, and the other end is grounded; one end of the capacitor C33 is connected Between R32 and the negative input terminal of U3B, the other end is grounded; R31, R32, C32, and C33 constitute a π-type filter circuit; one end of the pull-down resistor R35 is connected between the capacitor C33 and the negative input terminal of U3B, and the other end is grounded; one end of the pull-down resistor R36 is connected to the base of Q3, and the other end is grounded; the MCU controls the voltage value of the inverting input terminal of U3B by changing the duty cycle of the output waveform of the IO port, and the positive input terminal of U3B is connected to the voltage monitoring unit to collect the output OVP_AOUT; one end of the pull-up resistor R30 is connected between the output terminal of U3B and one end of the resistor R33, and the other end is connected to another voltage source for outputting a high-level voltage; the other end of the current limiting resistor R33 outputs OVP_Interrupt, and the OVP_Interrupt is output to the IO port of the MCU and the abnormal control unit.

5. A xenon flash lamp circuit device according to claim 1, characterized in that: The abnormal control unit specifically includes: U6 and U7 are two identical OR gate logic integrated circuits, each including 5 pins, U6 pin 1 is connected to OVP_Interrupt, U6 pin 2 is connected to OCP_Interrupt, U6 pin 3 is grounded, when overvoltage or overcurrent occurs, or both occur at the same time, U6 pin 4 outputs a high level, otherwise it outputs a low level and inputs to the next OR gate U7 pin 1, U6 pin 5 is connected to a voltage source, one end of a capacitor C48 is connected between the voltage source and pin 5, and the other end of C48 is connected to the capacitor C48. Grounded; Pin 2 of U7 is connected to the Timer_OUT square wave signal, which is the trigger signal of the subsequent starting circuit and is directly output by the MCU. Pin 1 of U7 receives a high level in the event of overcurrent or overvoltage. Regardless of whether the Timer_OUT square wave signal is high or low, the Alert_Ctr signal output by pin 4 of U7 is high; Pin 3 of U7 is grounded, and Pin 5 is connected to a voltage source. One end of a capacitor C37 is connected between the voltage source and Pin 5, and the other end of C37 is grounded.

6. A xenon flash lamp circuit device according to claim 5, characterized in that: The transformer circuit specifically includes: the Alert_Ctr signal is output to the base of the PNP transistor through a current limiting resistor R12, the collector of the PNP transistor is connected between the current limiting resistor R11 and the gate of the NMOS transistor Q2, the emitter of the PNP transistor is grounded, and when Alert_Ctr is at a high level, the PNP transistor is turned on; one end of the pull-down resistor R15 is connected between R12 and the base of the PNP transistor, and the other end of R15 is grounded; the gate of the NMOS transistor Q2 is connected to a current limiting resistor R11.

1. The drain of Q2 is connected to the 7th pin of a transformer, and the source is grounded through a current limiting resistor R16; the voltage between the gate and the source of the NMOS tube Q2 is not enough to turn on Q2, the input end of the transformer is open, and the output is cut off; the transformer includes 8 pins, pins 1, 5 and 8 are not connected, pin 6 is connected to the voltage VIN, pin 4 outputs the voltage through two rectifier diodes D2 and D3, and pin 2 is grounded; the voltage regulator diodes D6 and D7 are connected in series, the other end of D7 is grounded, and the other end of D6 is connected between D3 and the voltage output end, and connected to a voltage source; When there is no overvoltage or overcurrent, the 4th pin of U6 outputs a low level. At this time, the output Alert_Ctr of U7 is the level of Timer_OUT. This signal is the trigger signal of the subsequent ignition circuit. The high level enables it. At the same time, at the high level, the transformer circuit conversion output is turned off. The lighting of the flashing xenon lamp requires capacitor charging and discharge ionization. When Timer_OUT is a low level, the 3rd pin of the transformer outputs VCC6 through two rectifier diodes D4 and D5 to charge the subsequent capacitor and trigger the optocoupler to turn off. When Timer_OUT is a high level, the transformer circuit conversion output is cut off, triggering the optocoupler to turn on, and the subsequent capacitor begins to discharge, generating a kilovolt voltage through the trigger coil to ionize the xenon gas and emit light.

7. A xenon flash lamp circuit device according to claim 1, characterized in that: The sensor circuit specifically includes temperature detection, light detection and tipping detection sensor circuits; Wherein, the temperature detection sensor circuit includes a temperature detection sensor RP1, which exhibits different resistance values ​​at different ambient temperatures. After voltage division with R1, the 11th pin of the MCU detects different voltages and then calculates the ambient temperature through a formula; The light detection sensor circuit includes a light detection sensor RL1, which exhibits different resistance values ​​under different light conditions. After voltage division with R8, the MCU's 7-pin detects different voltages and then calculates the ambient light intensity through a formula; The tipping detection sensor circuit includes a tipping sensor R3, which is used to detect whether the device has tipped over to prevent dust contamination or optical path deviation. The R3 is a hollow sealed metal tube. There is a welding foot at each end of the metal tube, one is gold and the other is silver. There are two steel columns inside. When the steel column rolls to the gold end, the metal tube is turned on. When it rolls to the silver end, the metal tube is open. After voltage division with R2 and combined with the voltage source VIN, the 6th pin of the MCU detects different level states for detecting the placement state of the device.

8. A xenon flash lamp circuit device according to claim 7, characterized in that: The MCU specifically includes 32 pins, pins 1, 5 and 17 are connected to a voltage source respectively, one end of capacitors C43, C46 and C47 are connected between pins 1, 5 and 17 and the voltage source respectively, the other ends of C43, C46 and C47 are all grounded, one end of capacitor C44 is also connected between pin 1 and C43, the other end of C44 is grounded, and C43, C44, C46 and C47 are used for MCU power supply filtering; pins 16 and 32 are grounded; pin 31 is connected to a BOOT circuit, and the BOOT circuit includes resistors R38 and R39 connected in series, the other end of R38 is connected to a voltage source, the other end of R39 is grounded, and pin 31 is connected between R38 and R39 for level control during program burning; U10 is a monitoring and reset chip, including 5 pins, 1 pin is connected to 4 pin of MCU, automatically reset when powered on, and a manual reset circuit is designed, 3 pin is connected to one end of switch SW1, the other end of SW1 is grounded, and controlled by SW1 touch switch, one end of capacitor C45 is connected to 3 pin of U10, and the other end is connected to the other end of SW1, and C45 is used for jitter waveform filtering; Pin 5 of U10 is connected to a voltage source, and pin 2 is grounded. A capacitor C42 is connected between pins 5 and 2, and C42 is used for U10 power filtering; pin 2 of MCU is connected to an oscillation signal OSC_IN, and pin 3 outputs an oscillation signal OSC_OUT; pins 26-30 are short-circuited; pins 14 and 15 of the MCU are overcurrent and overvoltage interrupt trigger ports, pin 14 is connected to OCP_Interrupt, and pin 15 is connected to OVP_Interrupt; pins 23 and 24 of the MCU are respectively connected to pins 2 and 3 of the 4X1 pin header J3 for program burning, pin 1 of the 4X1 pin header J3 is connected to a voltage source, and pin 4 of the 4X1 pin header J3 is grounded; pins 6, 7, and 11 of the MCU are connected to the 4X1 pin header J3. The pins are respectively connected to the tipping detection, light detection and temperature detection sensor circuits, pins 8 and 9 are 485 debugging ports, pin 10 is the external ignition control signal input receiving port, pin 12 is the watchdog signal output, which is given to the monitoring and reset chip, pins 13 and 18 are PWM waveform output ports, which are used for OCP op amp comparator and OVP op amp comparator, pins 19 and 20 are timer signal ports, which are used to control the generation of Timer_OUT signal, pin 21 is the output of Alert_OUT alarm signal, pin 25 is the direct output port of Timer_OUT signal, and pin 22 is connected to light-emitting diode LED2 or LED1, LED2 is used for program debugging, and LED1 is the power indicator light.

9. A xenon flash lamp circuit device according to claim 1, characterized in that: The voltage regulating unit specifically includes: one end of the filter capacitor C26 is connected to the voltage VTTC obtained by the potentiometer, and the other end is grounded; one end of the voltage dividing resistor R23 is connected between one end of C26 and the voltage VTTC, and the other end of R23 is connected in series to one end of the voltage dividing resistor R30, and the other end of R30 is grounded; one end of the filter capacitor C22 is connected between the series resistors R23 and R30, and the other end is grounded; U4A together with R27 and C21 constitute an operational amplifier proportional integral circuit, and the resistor R27 and the capacitor C21 are connected in series to the U4A negative feedback circuit, that is, the U4A negative feedback circuit Pin 2 of the input terminal is connected to pin 1 of the output terminal; one end of R25 is the collection point of the transformer output voltage and is connected to one end of C22. The voltage of the other end of R25 is sent to the negative input terminal of U4A in one way and to the positive input terminal of U4A in another way through diode D14. When the voltage of pin 3 of the positive input terminal changes, the voltage value of the output terminal of U4A will change accordingly; the positive pole of diode D15 is connected to pin 3 of U4A, and the negative pole is connected to the other end of R25. D14 and D15 are diodes used to limit the common-mode input voltage range of the op amp and serve as an unloading path to avoid damage. The positive electrode of the voltage stabilizing diode D13 is grounded, and the negative electrode is connected to the other end of R25; one power supply end of U4A is connected to a positive voltage, and the other power supply end is grounded; the power supply filter capacitors C19 and C17 are connected in parallel to the positive power supply end of U4A, and the other ends of C19 and C17 are both grounded; a current limiting resistor R32 is connected in series to the output end of U4A, and the other end of R32 is connected to the base of the PNP transistor Q6; one end of the pull-down resistor R36 is connected between the other end of R32 and the base of Q6, and the other end is grounded; the emitter of Q6 is grounded, and the collector of Q6 is connected to the flyback The FB pin of the flyback switching regulator chip U3, inside U3, the FB pin is connected to the output of an error amplifier and the non-inverting input of the PWM generator. The non-inverting end of the error amplifier is a reference voltage, the inverting end is grounded, and the output end is a positive saturation voltage. The output end of the error amplifier has a certain internal resistance. When the CE path current of Q6 changes, the voltage of the FB pin will fluctuate dynamically and be transmitted to the non-inverting input of the PWM generator, affecting the output duty cycle of the flyback switching regulator chip U3, and then affecting the voltage value of the transformer output end.

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