Electronic buffer circuit for stage lamp software upgrading

Abstract

The utility model provides an electronic buffer circuit for stage lamp software upgrading, which comprises a control unit, a motor driving unit, a motor unit interface, an automatic change-over switch and a buffer capacitor bank, and the motor driving unit and the buffer capacitor bank are respectively connected to the motor unit interface through the automatic change-over switch; when the MCU chip works normally, the automatic change-over switch changes over the motor driving unit to be connected with the motor unit interface. When the MCU chip is in a software upgrading state, the automatic change-over switch switches the buffer capacitor bank to be connected with the motor unit interface; by sensitively monitoring the working state of the MCU chip, the motor driving unit or the buffer capacitor bank can be quickly switched to be connected to the motor unit interface in a corresponding normal working state or a software upgrading state, so that the stage lamp can normally work, and certain braking buffer can be provided for internal components of the stage lamp under the conditions of software upgrading and uninterruptible power supply; the electrical stability of the stage lamp system is improved, and the service life of the stage lamp is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of power electronics, especially relate to a stage lamp software upgrade time's electronic buffer circuit. BACKGROUND

[0002] The lamp head of stage lamp has various precise lens assemblies, when the stage lamp is normally used, the components in the stage lamp all depend on motor drive to normally run, but now many times, especially when debugging the lamp, the lamp will carry out software upgrade to the MCU chip in the use process, if when the focusing lens and the magnifying lens of the lamp are in the highest position, the MCU chip suddenly software upgrade, will cause the motor drive to be unstable, but since the buffer function in the hardware circuit of the prior art is all caused brake braking of components through power-off triggering, only in the situation of unstable driving, the focusing lens and magnifying lens components lack brake buffer function, may cause the focusing lens and magnifying lens components to suddenly fall, cause its damage, therefore, need to design a kind of hardware circuit, realize in the software updating process of stage lamp, whatever state the lamp is, will not cause damage to internal components. SUMMARY

[0003] The utility model aims at overcoming at least one of the above prior art defects, and provides a stage lamp software upgrade time's electronic buffer circuit.

[0004] The technical scheme provides a stage lamp software upgrade time's electronic buffer circuit, including control unit, motor drive unit, motor unit interface, automatic switching switch and buffer capacitor group, the motor drive unit with the buffer capacitor group is connected to the motor unit interface respectively through the automatic switching switch;The control unit includes MCU chip and buffer control circuit, and the buffer control circuit is connected the output end of MCU chip and the automatic switching switch;

[0005] When the MCU chip is normally worked, the I / O end of the MCU chip outputs first state signal, and the buffer control circuit correspondingly controls the automatic switching switch to switch the motor drive unit and the motor unit interface to be connected;

[0006] When the MCU chip is in software upgrade state, the I / O end of the MCU chip outputs second state signal, and the buffer control circuit correspondingly controls the automatic switching switch to switch the buffer capacitor group and the motor unit interface to be connected.

[0007] In the technical solution, the working state of the MCU chip is monitored sensitively, and the motor unit interface is connected to the motor drive unit or the buffer capacitor group in the corresponding normal working state or software upgrading state, so that the braking buffer function is provided for the internal components of the stage lamp in the software upgrading and uninterrupted power supply state without affecting the normal working mode of the stage lamp, the electrical stability of the stage lamp system is improved, and the service life of the stage lamp is prolonged. Specifically, in the normal working state of the MCU chip, the I / O end of the MCU chip outputs a first state signal, so that the motor drive unit is directly connected to the motor unit interface through the automatic switching switch, thereby ensuring that the stage lamp is directly driven by the motor unit interface to operate as expected. When the MCU chip enters the software upgrading state, the I / O end of the MCU chip outputs a second state signal to trigger the buffer control circuit switching switch to connect the buffer capacitor group to the motor unit interface, and cut off the connection between the motor drive unit and the motor unit interface, so as to avoid that the motor drive unit sends unstable signals to affect the working state of the motor unit interface. At the same time, the buffer capacitor group is connected to the motor unit interface through the switching connection, so as to provide stable power supply and buffer effect for the motor unit interface within a certain time, reduce the interference caused by unstable working of the MCU chip or instantaneous change of the power supply, thereby ensuring that the motor unit interface can still work normally during software upgrading, ensuring the working state of the internal components, and improving the electrical stability and anti-interference ability of the stage lamp.

[0008] Further, the buffer control circuit comprises an operation unit and a conduction unit, the operation unit is used for collecting the state signal of the MCU chip and outputting a control signal to the conduction unit correspondingly; the conduction unit comprises a power supply component and a selection conduction component, the power supply component comprises a Relay+ end and a Relay- end, and is connected to the control end of the automatic switching switch respectively, and the other end of the Relay+ end is connected to a first power supply, and the other end of the Relay- end is grounded through the selection conduction component; the selection conduction component is connected to the operation unit and is controlled by the operation unit to be turned on or off.

[0009] In one embodiment, the selection conduction component comprises a MOS tube Q4, a voltage dividing resistor R114 and a voltage dividing resistor R118, the output pin of the operation unit is connected to the ground through the voltage dividing resistor R114 and the voltage dividing resistor R118 in series, and the output pin of the operation unit is connected to the gate 1 of the MOS tube Q4 through the voltage dividing resistor R114, the source 2 of the MOS tube Q4 is grounded, and the drain 3 of the MOS tube Q4 is connected to the Relay- end of the power supply component.

[0010] Further, the operation unit comprises a charging unit, a guiding unit, a voltage dividing unit, and an operational amplifier unit. The I / O port of the MCU chip outputs a state signal to the charging unit, so that a potential is formed at both ends of the charging unit. The potential is processed by the guiding unit and then by the voltage dividing unit for voltage division, and is output by the operational amplifier unit as a control signal to the selection conduction component.

[0011] In one embodiment, the charging unit comprises a capacitor C129, the guiding unit comprises two diodes D3 connected in series, the positive electrode of the two diodes D3 connected in series is connected to a second power supply, and the negative electrode is connected to the voltage dividing unit. The I / O port of the MCU chip is connected to the capacitor C129 and further connected between the two diodes D3.

[0012] Further, the voltage dividing unit comprises a resistor R115 and a resistor R112 connected in series, a capacitor C126 connected in parallel to both the resistor R115 and the resistor R112, and a capacitor C61 connected in parallel to both sides of the resistor R112. The resistor R115 and the resistor R112 have a similar end connected to the operational amplifier unit as a voltage dividing node, and the other end of the resistor R115 is connected to the charging unit.

[0013] Further, the operational amplifier unit comprises a V+ terminal, a V- terminal, a -IN terminal, a +IN terminal, and an output terminal. The voltage dividing node is connected to the +IN terminal, the -IN terminal is connected to a third power supply, the V- terminal is grounded, the V+ terminal is connected to a fourth power supply, and the output terminal is connected to the conduction unit.

[0014] The capacitor C127 is connected in parallel between the V- terminal and the output terminal, and the V+ terminal is connected to the third power supply and further connected to the ground through the capacitor C128.

[0015] Further, the automatic switching switch comprises a switch unit, which comprises a power supply terminal, a common terminal, a normally open terminal, and a normally closed terminal. The power supply terminal serves as a control terminal. The power supply terminal is connected to the buffer control circuit, the common terminal is connected to the motor unit interface, the normally open terminal is connected to the motor driving unit, and the normally closed terminal is connected to the buffer capacitor group.

[0016] Specifically, when the MCU chip is in normal operation, the I / O end of the MCU chip outputs a first state signal, the buffer control circuit correspondingly controls the power end to be on, and the common end and the normally open end of the switch unit are connected to each other; when the MCU chip is in a software upgrade state, the I / O end of the MCU chip outputs a second state signal, the buffer control circuit correspondingly controls the power end to be off, and the common end and the normally closed end of the switch unit are connected to each other; and in the same switch unit, the normally open ends arranged in pairs are short-circuited, so that after the switch unit is powered on, the motor unit interface can be directly connected to the motor driving unit through the common end and the normally open end of the switch unit which is closed, and the expected operation is realized; at the same time, the power ends arranged in pairs are connected with a rectifier diode, so that the control end of the automatic switching switch can only be unidirectionally on, and damage caused by reverse voltage to the buffer control circuit when the switch unit is powered off is avoided.

[0017] Further, by setting the first state signal as an alternating signal with high and low levels, the MCU chip is indicated to be in normal operation; if the MCU outputs a second state signal which is a continuous high level or low level, it indicates that the MCU chip is not in a normal state and is possibly being upgraded, so that all abnormal states of the MCU chip including the software upgrade state are sensitively identified, and the braking and buffering function of the internal components of the stage lamp can be provided under the condition that the MCU chip outputs abnormally and is not powered off, the electrical stability of the stage lamp system is improved, and the service life of the stage lamp is prolonged.

[0018] Preferably, the motor unit interface is connected to a two-phase motor or a three-phase motor; the electronic buffer circuit provided in the technical solution is applicable to the stage lamp system using a two-phase motor and a three-phase motor; specifically, the buffer capacitor group includes a first capacitor group, a second capacitor group and a third capacitor group; preferably, the first capacitor group, the second capacitor group and the third capacitor group each include a plurality of parallel buffer capacitors, which are used to match the component requirements of the braking of the motor.

[0019] When the motor unit interface is connected to a two-phase motor, the first capacitor group and the third capacitor group are connected between the switch unit and the motor unit interface, and the second capacitor group is normally closed.

[0020] When the motor unit interface is connected to a three-phase motor, the first capacitor group, the second capacitor group and the third capacitor group are all connected between the switch unit and the motor unit interface.

[0021] In one embodiment, the motor unit interface includes a connection port A1, a connection port B1, a connection port C1 and a connection port D1, which are used to connect a two-phase motor or a three-phase motor.

[0022] The automatic switch includes a switch unit K1 and a switch unit K2,

[0023] One end of the first capacitor group is connected to the normally closed end of the switch unit K1, and the other end is connected to the motor driving unit; the common end of the switch unit K1 is connected to the connection port A1;

[0024] One end of the second capacitor group is connected to the normally closed end of the switch unit K1, and the other end is connected to the normally closed end of the switch unit K2; the common end of the switch unit K2 is connected to the connection port C1;

[0025] One end of the third capacitor group is connected to the normally closed end of the switch unit K2, and the other end is connected to the connection port B1 through the resistance R47, and at the same time, connected to the connection port D1 through the resistance R49;

[0026] When the motor unit interface connects a two-phase motor, the resistance R47 is disconnected, the resistance R49 is short-circuited, one end of the third capacitor group is connected to the normally closed end of the switch unit K2, and the other end is connected to the connection port D1 through the resistance R49;

[0027] When the motor unit interface connects a three-phase motor, the resistance R49 is disconnected, and the resistance R47 is short-circuited, one end of the third capacitor group is connected to the normally closed end of the switch unit K2, and the other end is connected to the connection port B1 through the resistance R47.

[0028] The utility model discloses a beneficial effect is: provide an electronic buffer circuit for stage lamp software upgrade, through sensitive monitoring MCU chip's working condition, under corresponding normal work or software upgrade state can switch rapidly and make motor unit interface connect motor drive unit or buffer capacitor group to the stage lamp internal component provides certain brake buffer function under the condition of not influencing normal working mode, improves the electrical stability of stage lamp system, prolongs the service life of stage lamp. Specifically, under the condition of MCU chip normal work, motor drive unit and motor unit interface are connected directly through automatic switching switch, thereby guaranteeing that stage lamp is directly driven according to the expected operation through motor unit interface;When MCU chip enters software upgrade state, trigger buffer control circuit switching switch, connect buffer capacitor group with motor unit interface, and cut off the connection of motor drive unit and motor unit interface, avoid the unstable signal of motor drive unit to influence the working condition of motor unit interface, and simultaneously, through switching connection buffer capacitor group, the stable power supply and buffer effect are provided for motor unit interface in certain time, reduce the interference of the unstable work of MCU chip or power supply instantaneous change, thereby ensuring that motor unit interface can still keep normal work during software upgrade, guarantee the working condition of internal component, improve the electrical stability and anti -interference ability of stage lamp interior. BRIEF DESCRIPTION OF DRAWINGS

[0029] Fig. 1 It is the circuit principle drawing of the control unit of the electronic buffer circuit of the utility model provides a stage lamp software upgrade.

[0030] Fig. 2 It is the circuit principle drawing of the electronic buffer circuit of the utility model provides a stage lamp software upgrade.

[0031] BRIEF DESCRIPTION OF DRAWINGS: buffer control circuit 100, operation unit 110, charging unit 111, guide unit 112, voltage division unit 113, operational amplifier unit 114, conduction unit 120, power supply component 121, selection conduction component 122, motor drive unit 200, motor unit interface 300, automatic switching switch 400, first capacitor group 510, second capacitor group 520, third capacitor group 530. DETAILED DESCRIPTION

[0032] The utility model drawing is only for example explanation, can not be understood as the limitation of the utility model. In order to better illustrate the following embodiment, some components of the drawing can be omitted, enlarged or reduced, and the size of actual product is not represented;For those skilled in the art, it is understandable that some well-known structures and their description in the drawing can be omitted.

[0033] Embodiment 1

[0034] As Figs. 1-2 The embodiment provides an electronic buffer circuit for software upgrade of a stage lamp, which comprises a control unit, a motor driving unit 200, a motor unit interface 300, an automatic switching switch 400 and a buffer capacitor group, the motor driving unit 200 and the buffer capacitor group are connected to the motor unit interface 300 through the automatic switching switch 400 respectively; the control unit comprises an MCU chip and a buffer control circuit 100, the buffer control circuit 100 is connected to the output end of the MCU chip and the automatic switching switch 400;

[0035] When the MCU chip works normally, the I / O end of the MCU chip outputs a first state signal, and the buffer control circuit 100 controls the automatic switching switch 400 to switch the motor driving unit 200 and the motor unit interface 300 to be connected;

[0036] When the MCU chip is in a software upgrade state, the I / O end of the MCU chip outputs a second state signal, and the buffer control circuit 100 controls the automatic switching switch 400 to switch the buffer capacitor group and the motor unit interface 300 to be connected.

[0037] Further, the buffer control circuit 100 comprises an operation unit 110 and a conduction unit 120, the operation unit 110 is used for collecting the state signal of the MCU chip and outputting a corresponding control signal to the conduction unit 120;

[0038] The conduction unit 120 comprises a power supply component 121 and a selection conduction component 122, the power supply component 121 comprises a Relay+ end and a Relay- end, and is connected to the control end of the automatic switching switch respectively, and the other end of the Relay+ end is connected to a first power supply, and the other end of the Relay- end is grounded through the selection conduction component 122; the selection conduction component 122 is connected to the operation unit 110 and is controlled to be turned on and turned off by the operation unit 110.

[0039] Further, the operation unit 110 comprises a charging unit 111, a guide unit 112, a voltage division unit 113 and an operational amplifier unit 114, the I / O end of the MCU chip outputs a state signal to the charging unit 111, so that the two ends of the charging unit 111 form a potential, the potential is subjected to voltage drop processing through the guide unit 112 and then subjected to voltage division processing through the voltage division unit 113, and the output of the operational amplifier unit 114 is subjected to operational amplification to be a control signal to the selection conduction component 122.

[0040] Further, the automatic switching switch 400 comprises a switch unit, the switch unit comprises a power supply end, a common end, a normally open end and a normally closed end, the power supply end is used as a control end, and in the same switch unit, a rectifier diode is connected between the power supply ends arranged in pairs;

[0041] The power supply end is connected to the buffer control circuit 100, the common end is connected to the motor unit interface 300, the normally open end is connected to the motor driving unit 200, and the normally closed end is connected to the buffer capacitor group.

[0042] When the MCU chip is normally working, the I / O end of the MCU chip outputs a first state signal, the buffer control circuit 100 correspondingly controls the power supply end to be on, and the common end and the normally open end of the switch unit are connected to each other.

[0043] When the MCU chip is in a software upgrading state, the I / O end of the MCU chip outputs a second state signal, the buffer control circuit 100 correspondingly controls the power supply end to be off, and the common end and the normally closed end of the switch unit are connected to each other.

[0044] Further, by setting the first state signal as an alternating signal with high and low levels alternately, the MCU chip is indicated to be normally working, at this time, if the MCU outputs the second state signal as a continuous high level or low level, it indicates that the MCU chip is not in a normal working state and may be in a software upgrading state, thereby all abnormal states of the MCU chip including the software upgrading state are sensitively identified, and the brake buffer function for internal components of the stage lamp can be provided under the condition that the MCU chip outputs abnormally and the power is not interrupted, the electrical stability of the stage lamp system is improved, and the service life of the stage lamp is prolonged.

[0045] Preferably, the motor unit interface 300 is connected to a two-phase motor or a three-phase motor; the electronic buffer circuit in the embodiment is applicable to the stage lamp system using the two-phase motor and the three-phase motor, specifically, the buffer capacitor group includes a first capacitor group 510, a second capacitor group 520 and a third capacitor group 530, and the first capacitor group 510, the second capacitor group 520 and the third capacitor group 530 each include a plurality of parallel buffer capacitors, which are convenient for matching the requirements of components to be braked by the motor.

[0046] When the motor unit interface 300 is connected to the two-phase motor, the first capacitor group 510 and the third capacitor group 530 are connected between the switch unit and the motor unit interface 300, and the second capacitor group 520 is usually closed.

[0047] When the motor unit interface 300 is connected to the three-phase motor, the first capacitor group 510, the second capacitor group 520 and the third capacitor group 530 are all connected between the switch unit and the motor unit interface 300.

[0048] Embodiment 2

[0049] As Figs. 1-2As shown, the embodiment also provides an electronic buffer circuit for software upgrading of a stage lamp, which comprises a control unit, a motor driving unit 200, a motor unit interface 300, an automatic switching switch 400 and a buffer capacitor group. The control unit comprises an MCU chip and a buffer control circuit 100. The buffer capacitor group comprises a first capacitor group 510, a second capacitor group 520 and a third capacitor group 530. Preferably, in order to facilitate matching the requirements of components required for braking of the motor, the first capacitor group 510, the second capacitor group 520 and the third capacitor group 530 each comprise a plurality of parallel buffer capacitors.

[0050] The buffer control circuit 100 comprises an operation unit 110 and a conduction unit 120. The conduction unit 120 comprises a power supply component 121 and a selection conduction component 122. The power supply component 121 comprises a Relay+ end and a Relay- end, and is connected to the control end of the automatic switching switch, respectively. The Relay+ end is connected to a first power supply of +5V at the other end, and the Relay- end is connected to the ground through the selection conduction component 122. The selection conduction component 122 is connected to the operation unit 110 and is controlled by the operation unit 110. The selection conduction component 122 comprises a MOS tube Q4, a voltage dividing resistor R114 and a voltage dividing resistor R118. The output pin of the operation unit 110 is connected to the ground through the voltage dividing resistor R114 and the voltage dividing resistor R118 in series, and the output pin of the operation unit 110 is connected to the gate 1 of the MOS tube Q4 through the voltage dividing resistor R114. The source 2 of the MOS tube Q4 is connected to the ground, and the drain 3 of the MOS tube Q4 is connected to the Relay- end of the power supply component 121.

[0051] Further, the operation unit 110 comprises a charging unit 111, a guide unit 112, a voltage dividing unit 113 and an operational amplifier unit 114. The charging unit 111 comprises a capacitor C129. The guide unit 112 comprises two diodes D3 connected in series. One end of the two diodes D3 connected in series is connected to a second power supply of 3.3V, the negative electrode is connected to the voltage dividing unit 113, and the I / O end of the MCU chip is connected to the capacitor C129 and further connected between the two diodes D3. The voltage dividing unit 113 comprises resistors R115 and R112 connected in series, a capacitor C126 connected in parallel to the resistors R115 and R112, and a capacitor C61 connected in parallel to the resistors R112. The resistors R115 and R112 are connected to the voltage dividing node and the operational amplifier unit 114. The operational amplifier unit 114 comprises a V+ end, a V- end, a -IN end, a +IN end and an output end. The voltage dividing node is connected to the +IN end, the -IN end is connected to a third power supply of 3.3V, the V- end is connected to the ground, the V+ end is connected to a fourth power supply of +5V, and the output end is connected to the conduction unit 120. The capacitor C127 is connected in parallel to the V- end and the output end, and the V+ end is connected to the third power supply and further connected to the ground through the capacitor C128.

[0052] The automatic switch 400 includes the switch unit K1 and the switch unit K2. Specifically, when the MCU chip is in a normal working state, the I / O end of the MCU chip sends a PWM signal with a frequency of 20 KHz and a duty cycle of 50%, charges the capacitor C129, and makes the voltage on the left side of the capacitor C129 rise to 3.3V. The voltage and the output voltage (3V-0.7V=2.3V, 0.7V is the voltage drop of the diode) of the diode D3 directly connected to the second power supply are added, and a voltage of 4.9V is input to another diode D3. After the voltage of 4.2V is divided by the resistor R112 and the resistor R115, a voltage greater than 3V is input to the +IN end of the operational amplifier unit 114, so that the output end of the operational amplifier unit 114 outputs a high-level control signal to the gate of the transistor Q4. The high-level gate turns on the transistor Q4, so that the Relay-ground, so that the power supply ends of the switch unit K1 and the switch unit K2 are turned on, the common end is connected to the normally closed end, the motor unit interface 300 is directly connected to the motor driving unit 200, and the predetermined working mode is realized.

[0053] When the MCU chip is in a software upgrading state, the I / O end of the MCU chip continuously sends a high-level or low-level state signal, the capacitor C129 cannot be charged, and the output voltage (3V-0.7V=2.3V, 0.7V is the voltage drop of the diode) of the diode D3 directly connected to the second power supply is input to another diode D3. After the voltage of 1.6V is obtained at the output end of the diode D3, the voltage of 1.6V is divided by the resistor R112 and the resistor R115, a voltage less than 3V is input to the +IN end of the operational amplifier unit 115, so that the output end of the operational amplifier unit 114 outputs a low-level control signal to the gate of the transistor Q4. The low-level gate of the transistor Q4 makes the Relay-end float and cannot be grounded smoothly, so that the power supply ends of the switch unit K1 and the switch unit K2 are disconnected, the common end is connected to the normally closed end, the motor unit interface 300 is directly connected to the buffer capacitor group, the power supply fluctuation is relieved through the buffer capacitor group, and the buffer brake of the motor to the controlled components is realized.

[0054] Preferably, the electronic buffer circuit in the embodiment is applicable to the stage lamp system when a two-phase motor and a three-phase motor are used. Specifically, the motor unit interface 300 includes the connection port A1, the connection port B1, the connection port C1, and the connection port D1, which are used to connect the two-phase motor or the three-phase motor.

[0055] One end of the first capacitor group 510 is connected to the normally closed ends 2 and 7 of the switch unit K1, and the other end is connected to the motor driving unit 200. The common ends 3 and 6 of the switch unit K1 are connected to the connection port A1.

[0056] The second capacitor group 520 is connected to the normally closed end 2, 7 of the switch unit K1 at one end and to the normally closed end 2, 7 of the switch unit K2 at the other end; the common end 3, 6 of the switch unit K2 is connected to the connection port C1;

[0057] The third capacitor group 530 is connected to the normally closed end 2, 7 of the switch unit K2 at one end and to the connection port B1 through the resistor R47 at the other end, and is connected to the connection port D1 through the resistor R49 at the same time;

[0058] When the motor unit interface 300 connects a two-phase motor, the first capacitor group 510 and the third capacitor group 530 are connected between the switch unit and the motor unit interface 300, the second capacitor group 520 is normally closed, the resistor R47 is set to be disconnected, the resistor R49 is short-circuited, one end of the third capacitor group 530 is connected to the normally closed end of the switch unit K2, and the other end is connected to the connection port D1 through the resistor R49;

[0059] When the motor unit interface 300 connects a three-phase motor, the first capacitor group 510, the second capacitor group 520 and the third capacitor group 530 are all connected between the switch unit and the motor unit interface 300, the resistor R49 is set to be disconnected, the resistor R47 is short-circuited, one end of the third capacitor group 530 is connected to the normally closed end of the switch unit K2, and the other end is connected to the connection port B1 through the resistor R47.

[0060] Obviously, the embodiments of the present application are merely examples for clearly illustrating the technical solutions of the present application, and are not intended to limit the specific embodiments of the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An electronic buffer circuit for software upgrades of a stage light, characterized in that The control unit, the motor driving unit, the motor unit interface, the automatic switching switch and the buffer capacitor group are connected to the motor unit interface through the automatic switching switch respectively; the control unit includes the MCU chip and the buffer control circuit, and the buffer control circuit is connected to the output end of the MCU chip and the automatic switching switch; When the MCU chip works normally, the I / O end of the MCU chip outputs the first state signal, and the buffer control circuit controls the automatic switching switch to connect the motor driving unit and the motor unit interface; When the MCU chip is in the software upgrading state, the I / O end of the MCU chip outputs the second state signal, and the buffer control circuit controls the automatic switching switch to connect the buffer capacitor group and the motor unit interface.

2. The electronic buffer circuit for software upgrade of a stage light according to claim 1, wherein, The buffer control circuit includes the operation unit and the conduction unit, the operation unit is used for collecting the state signal of the MCU chip and outputting the control signal to the conduction unit correspondingly; The conduction unit includes the power supply component and the selection conduction component, the power supply component includes the Relay+ end and the Relay- end, and is connected to the control end of the automatic switching switch respectively, and the other end of the Relay+ end is connected to the first power supply, and the other end of the Relay- end is grounded through the selection conduction component; the selection conduction component is connected to the operation unit and is controlled to be turned on and turned off by the operation unit.

3. The electronic buffer circuit for software upgrade of a stage light according to claim 2, wherein, The selection conduction component includes the MOS tube Q4, the voltage dividing resistor R114 and the voltage dividing resistor R118, the output pin of the operation unit is connected to the ground through the voltage dividing resistor R114 and the voltage dividing resistor R118 in series, and the output pin of the operation unit is connected to the gate 1 of the MOS tube Q4 through the voltage dividing resistor R114, the source 2 of the MOS tube Q4 is grounded, and the drain 3 of the MOS tube Q4 is connected to the Relay- end of the power supply component.

4. The electronic buffer circuit for software upgrade of a stage light according to any one of claims 2-3, characterized in that, The operation unit includes the charging unit, the guide unit, the voltage dividing unit and the operational amplifier unit, the I / O end of the MCU chip outputs the state signal to the charging unit, so that the two ends of the charging unit form the electric potential, the electric potential is processed by the voltage dropping of the guide unit and then is processed by the voltage dividing of the voltage dividing unit, and the control signal is output to the selection conduction component by the operational amplifier unit.

5. The electronic buffer circuit for stage lighting software upgrades according to claim 4, characterized in that, The charging unit includes the capacitor C129, the guide unit includes two diodes D3 connected in series, the positive electrode of the two diodes D3 connected in series is connected to the second power supply, the negative electrode is connected to the voltage dividing unit, and the I / O end of the MCU chip is connected to the capacitor C129 and further connected to the two diodes D3.

6. The electronic buffer circuit for software upgrade of a stage light according to claim 4, wherein, The voltage dividing unit includes the resistor R115 and the resistor R112 connected in series, the capacitor C126 connected in parallel to the resistor R115 and the resistor R112, and the capacitor C61 connected in parallel to the resistor R112, the resistor R115 and the resistor R112 are connected to the operational amplifier unit at the voltage dividing node, and the other end of the resistor R115 is connected to the charging unit.

7. The electronic buffer circuit for software upgrade of a stage light according to claim 6, wherein, The operational amplifier unit comprises a V+ terminal, a V- terminal, an -IN terminal, a +IN terminal and an output terminal, the voltage division node is connected to the +IN terminal, the -IN terminal is connected to a third power supply, the V- terminal is grounded, the V+ terminal is connected to a fourth power supply, and the output terminal is connected to the conduction unit; The V- terminal is connected in parallel with the output terminal through a capacitor C127, and the V+ terminal is connected to the third power supply and further connected to the ground through a capacitor C128.

8. The electronic buffer circuit for software upgrade of a stage light according to claim 2, wherein, The automatic switching switch comprises a switching unit, the switching unit comprises a power supply terminal, a common terminal, a normally open terminal and a normally closed terminal, the power supply terminal serves as a control terminal, and a pair of power supply terminals are connected through a rectifier diode; The power supply terminal is connected to the buffer control circuit, the common terminal is connected to the motor unit interface, the normally open terminal is connected to the motor drive unit, and the normally closed terminal is connected to the buffer capacitor group; When the MCU chip works normally, the I / O terminal of the MCU chip outputs a first state signal, the buffer control circuit correspondingly controls the conduction between the power supply terminals, and the common terminal and the normally open terminal of the switching unit are connected to each other; When the MCU chip is in a software upgrading state, the I / O terminal of the MCU chip outputs a second state signal, the buffer control circuit correspondingly controls the disconnection between the power supply terminals, and the common terminal and the normally closed terminal of the switching unit are connected to each other.

9. The electronic buffer circuit for software upgrading of a stage lamp according to claim 8, characterized in that The motor unit interface is connected to a two-phase motor or a three-phase motor; The buffer capacitor group comprises a first capacitor group, a second capacitor group and a third capacitor group; When the motor unit interface is connected to a two-phase motor, the first capacitor group and the third capacitor group are connected between the switching unit and the motor unit interface, and the second capacitor group is normally closed; When the motor unit interface is connected to a three-phase motor, the first capacitor group, the second capacitor group and the third capacitor group are all connected between the switching unit and the motor unit interface.

10. The electronic buffer circuit for software upgrade of a stage light according to claim 9, wherein, The first state signal is an alternating signal with high level and low level, and the second state signal is a continuous high level or low level.

11. The electronic buffer circuit for software upgrade of a stage light according to claim 10, wherein, The motor unit interface comprises connection ports A1, B1, C1 and D1, and is used for connecting a two-phase motor or a three-phase motor; The automatic switching switch comprises switching units K1 and K2, One end of the first capacitor group is connected to the normally closed terminal of the switching unit K1, and the other end is connected to the motor drive unit; The common terminal of the switching unit K1 is connected to the connection port A1; One end of the second capacitor group is connected to the normally closed terminal of the switching unit K1, and the other end is connected to the normally closed terminal of the switching unit K2; The common terminal of the switching unit K2 is connected to the connection port C1; One end of the third capacitor group is connected to the normally closed terminal of the switching unit K2, and the other end is connected to the connection port B1 through a resistor R47, and is connected to the connection port D1 through a resistor R49. When the motor unit interface connects a two-phase motor, one end of the third capacitor group is connected to the normally closed end of the switch unit K2, and the other end is connected to the connection port D1 through the resistor R49; When the motor unit interface connects a three-phase motor, one end of the third capacitor group is connected to the normally closed end of the switch unit K2, and the other end is connected to the connection port B1 through the resistor R47.

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