Barrier gate anti-power-down circuit and barrier gate

Abstract

The utility model provides a barrier gate anti-power-down circuit and a barrier gate. A main power supply can output a first voltage, and a standby power supply can output a second voltage. The voltage sampling module can perform voltage division operation on the first voltage to generate a sampling voltage. The main control module can compare the voltage value of the sampling voltage with a set value, and if the voltage value of the sampling voltage is larger than the set value, the main control module outputs a control signal. When the step-down module does not receive the control signal, the step-down module carries out step-down operation on the first voltage to generate a third voltage. When the step-down module receives the control signal, the step-down module carries out step-down operation on the second voltage to generate a fourth voltage. The boost module may boost the third voltage or the fourth voltage to generate a motor supply voltage. The voltage conversion module can perform voltage conversion operation on the third voltage or the fourth voltage to generate a chip power supply voltage.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit technical field, especially relate to a barrier gate anti power -down circuit and barrier gate. BACKGROUND

[0002] In the modern society, barrier gate needs drive circuit drive to carry out the operation of lifting and lowering.

[0003] However, when some toll parking lot abnormal power failure occurs, the drive circuit cannot drive the barrier gate, which will bring certain loss to the toll parking lot. Therefore, there is a technical problem that the existing barrier gate cannot work under abnormal power failure.

[0004] Therefore, a barrier gate anti power -down circuit and barrier gate are needed to solve the above technical problems. UTILITY MODEL CONTENTS

[0005] The utility model provides a barrier gate anti power -down circuit and barrier gate, effectively solve the technical problem that the existing barrier gate cannot work under abnormal power failure.

[0006] The utility model provides a barrier gate anti power -down circuit, it includes,

[0007] Main power supply for outputting first voltage;

[0008] Stand -by power supply for outputting second voltage;

[0009] Voltage sampling module is connected main power supply, for voltage dividing operation to first voltage, to generate sampling voltage;

[0010] Main control module is connected with voltage sampling module, for comparing the voltage value of sampling voltage and the size of setting, if the voltage value of sampling voltage is greater than setting, then main control module outputs control signal;

[0011] Buck module is connected main power supply, stand -by power supply and main control module, when buck module receives control signal, buck module carries out voltage -reducing operation to first voltage, to generate third voltage, when buck module does not receive control signal, buck module carries out voltage -reducing operation to second voltage, to generate fourth voltage;

[0012] Boost module is connected with buck module, for voltage -raising operation to third voltage or fourth voltage, to generate motor power supply voltage, and the motor power supply voltage is used to power supply drive motor in barrier gate interior;

[0013] The voltage conversion module is connected with the voltage reduction module, and is used for performing voltage conversion operation on the third voltage or the fourth voltage to generate a chip power supply voltage, which is used for power supply for integrated circuit chips inside the barrier gate.

[0014] Further, the voltage sampling module comprises a voltage sampling unit, the master control module comprises a master control chip, the master control chip comprises a master control input pin and a master control output pin, the voltage reduction module comprises an input interface, a MOS tube and a voltage reduction chip, the input interface comprises a first input pin and a second input pin, the voltage reduction chip comprises a voltage reduction input pin and a voltage reduction output pin, one end of the voltage sampling unit is connected with the main power supply, and the other end of the voltage sampling unit is connected with the master control input pin, and the voltage sampling unit is used for performing voltage division operation on the first voltage to generate a sampling voltage.

[0015] One end of the first input pin is connected with the main power supply, and the other end of the first input pin is connected with the voltage reduction input pin. One end of the second input pin is connected with the backup power supply, and the other end of the second input pin is connected with the drain of the MOS tube. The gate of the MOS tube is connected with the master control output pin. The master control chip is used for comparing the voltage value of the sampling voltage with a set value. If the voltage value of the sampling voltage is greater than the set value, the master control module outputs a control signal. The MOS tube is used for being turned on based on the control signal. The source of the MOS tube is connected with the voltage reduction input pin. The voltage reduction chip performs voltage reduction operation on the first voltage to generate a third voltage, or performs voltage reduction operation on the second voltage to generate a fourth voltage. The voltage reduction output pin is used for outputting the third voltage or the fourth voltage.

[0016] Further, the voltage conversion module comprises a voltage conversion chip, the voltage conversion chip comprises a voltage conversion input pin and a voltage conversion output pin, the voltage conversion input pin is connected with the voltage reduction output pin, and the voltage conversion chip is used for performing voltage conversion operation on the third voltage or the fourth voltage to generate a chip power supply voltage, and the voltage conversion output pin is used for outputting the chip power supply voltage.

[0017] Further, the voltage conversion module comprises a voltage conversion chip, the voltage conversion chip comprises a voltage conversion input pin and a voltage conversion output pin, the voltage conversion input pin is connected with the voltage reduction output pin, and the voltage conversion chip is used for performing voltage conversion operation on the third voltage or the fourth voltage to generate a chip power supply voltage, and the voltage conversion output pin is used for outputting the chip power supply voltage.

[0018] Further, the voltage reducing module comprises a first diode and a second diode, a positive electrode of the first diode is connected to the second input pin, a negative electrode of the first diode is connected to the drain of the MOS tube, the second diode is connected in parallel with the first diode, and the first diode and the second diode are used for preventing reverse charging of the backup power supply.

[0019] Further, the voltage reducing module further comprises a filtering unit, the filtering unit is connected in parallel with the voltage reducing output pin, and the filtering unit is used for filtering operation on the third voltage or the fourth voltage.

[0020] Further, the voltage reducing module further comprises a protection unit, the protection unit is connected in parallel with the voltage reducing output pin and is used for protection operation on a circuit at a rear stage, so as to avoid damage of a large voltage generated by short circuit of the main power supply to the circuit at the rear stage.

[0021] Further, the voltage sampling unit comprises a first sampling resistor and a second sampling resistor, one end of the first sampling resistor is connected to the main power supply, the other end of the first sampling resistor is connected to one end of the second sampling resistor, and the other end of the second sampling resistor is connected to the main control input pin.

[0022] Further, the model of the voltage reducing chip is LM2576, and the signal of the voltage increasing chip is MT3608.

[0023] A barrier gate comprises the barrier gate anti-power failure circuit.

[0024] The utility model discloses compared with prior art, its beneficial effect is: the utility model provides a barrier anti -power -down circuit, this barrier anti -power -down circuit includes main power supply, spare power supply, voltage sampling module, main control module, voltage reducing module, voltage increasing module, voltage conversion module. Main power supply can output first voltage, and spare power supply can output second voltage. Voltage sampling module can carry out voltage division operation to first voltage, and voltage sampling module can generate sampling voltage. Main control module can compare the voltage value of sampling voltage and the size of setting, and if the voltage value of sampling voltage is greater than setting, then main control module exports control signal. When voltage reducing module has not received control signal, voltage reducing module carries out voltage reducing operation to first voltage, and voltage reducing module can generate third voltage. When voltage reducing module receives control signal, voltage reducing module carries out voltage reducing operation to second voltage, and voltage reducing module can generate fourth voltage. Voltage increasing module can carry out voltage increasing operation to third voltage or fourth voltage, and voltage increasing module can generate motor power supply voltage, and motor power supply voltage is used to power drive motor inside barrier. Voltage conversion module can carry out voltage conversion operation to third voltage or fourth voltage, and voltage conversion module can generate chip power supply voltage, and chip power supply voltage is used to power integrated circuit chip inside barrier. Therefore, when abnormal power failure, this barrier anti -power -down circuit can also convert second voltage exported by spare power supply into motor power supply voltage and chip power supply voltage, thereby maintaining the power supply of barrier. Effectively solved the technical problem that present barrier can not work under abnormal power failure. If the barrier with the circuit is installed in the toll parking lot, the loss caused by abnormal power failure can be effectively avoided. Moreover, the barrier can also keep stable working state for a long time, and sudden power failure does not occur. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following briefly introduces the drawings needed to be used in the embodiments, and the drawings in the following description are only corresponding drawings of some embodiments of the utility model.

[0026] Figure 1 It is the block diagram of barrier anti -power -down circuit one embodiment of the utility model.

[0027] Figure 2 It is the circuit diagram of main control module of barrier anti -power -down circuit one embodiment of the utility model.

[0028] Figure 3 It is the circuit diagram of voltage sampling module and voltage reducing module of barrier anti -power -down circuit one embodiment of the utility model.

[0029] Figure 4 It is the circuit diagram of voltage increasing module of barrier anti -power -down circuit one embodiment of the utility model.

[0030] Figure 5The utility model discloses a gate anti -power -down circuit one embodiment's voltage conversion module's circuit diagram.

[0031] In the drawing, 10, gate anti -power -down circuit, 11, main power supply, 12, standby power supply, 13, voltage sampling module, 131, voltage sampling unit, 14, main control module, 15, voltage reduction module, 151, filter unit, 152, protection unit, 16, voltage increase module, 17, voltage conversion module, 18, first input pin, 19, second input pin. DETAILED DESCRIPTION

[0032] The technical scheme in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative work belong to the range of protection of the utility model.

[0033] The direction terms mentioned in the utility model, for example, "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom" are only the orientation of the drawings, and the direction terms are used to explain and understand the utility model and not to limit the utility model.

[0034] The terms "first", "second" and the like in the utility model are only for the purpose of description and cannot be understood as indicating or implying relative importance and not as a limitation on the order.

[0035] In the drawings, the units with similar structures are indicated with the same reference numerals.

[0036] Please refer to Figure 1 The utility model provides a kind of gate anti -power -down circuit 10.The gate anti -power -down circuit 10 is applied to a kind of gate, and the gate anti -power -down circuit 10 includes main power supply 11, standby power supply 12, voltage sampling module 13, main control module 14, voltage reduction module 15, voltage increase module 16, voltage conversion module 17.Main power supply 11 is used to output first voltage, and the first voltage is 24V.Second voltage is output by standby power supply 12, and the second voltage is 12V.Voltage sampling module 13 is connected with main power supply 11, and voltage sampling module 13 is used to carry out voltage division operation to first voltage, and voltage sampling module 13 can generate sampling voltage.Main control module 14 is connected with voltage sampling module 13, and main control module 14 can compare the voltage value of sampling voltage and the size of set value, and the set value can be 0V.If the voltage value of sampling voltage is greater than set value, then main control module 14 outputs control signal.

[0037] Please refer to Figure 1The voltage sampling module 13 is connected to the main power supply 11 and the backup power supply 12. When the voltage sampling module 13 receives the control signal, the voltage sampling module 13 performs a voltage sampling operation on the first voltage, and the voltage sampling module 13 can generate a sampling voltage. When the voltage sampling module 13 does not receive the control signal, the voltage sampling module 13 performs a voltage sampling operation on the second voltage, and the voltage sampling module 13 generates a fourth voltage. The third voltage and the fourth voltage are both 5V. The voltage conversion module 17 is connected to the voltage sampling module 13, and the voltage conversion module 17 can perform a voltage conversion operation on the third voltage or the fourth voltage. The voltage conversion module 17 can generate a chip supply voltage, and the chip supply voltage is 3.3V. The chip supply voltage is used to supply power to the integrated circuit chip inside the barrier gate.

[0038] Please refer to Figures 2 to 5 The specific structure of the barrier gate anti-power-down circuit 10 is described in detail as follows:

[0039] Please refer to Figure 2 and Figure 3 The voltage sampling module 13 includes a voltage sampling unit 131, and the main control module 14 includes a main control chip U1. The main control chip U1 includes a main control input pin T3C3 / ADC8 / PB0 and a main control output pin BOOT1 / PB2. The voltage reduction module 15 includes an input interface J9, a MOS tube G10, and a voltage reduction chip U18. The model of the voltage reduction chip U18 is LM2576. The input interface J9 includes a first input pin 18 and a second input pin 19. The voltage reduction chip U18 includes a voltage reduction input pin in and a voltage reduction output pin out. One end of the voltage sampling unit 131 is connected to the main power supply 11 through the input interface J9, and the other end of the voltage sampling unit 131 is connected to the main control input pin T3C3 / ADC8 / PB0. The voltage sampling unit 131 is used to perform a voltage division operation on the first voltage, and the voltage sampling unit 131 can generate a sampling voltage. The voltage sampling unit 131 includes a first sampling resistor R57 and a second sampling resistor R58. One end of the first sampling resistor R57 is connected to the main power supply 11, the other end of the first sampling resistor R57 is connected to one end of the second sampling resistor R58, and the other end of the second sampling resistor R58 is connected to the main control input pin.

[0040] Please refer to Figure 2 and Figure 3One end of the first input pin 18 is connected to the main power supply 11, and the other end of the first input pin 18 is connected to the step-down input pin in. One end of the second input pin 19 is connected to the backup power supply 12, and the other end of the second input pin 19 is connected to the drain of the MOS tube G10. The gate of the MOS tube G10 is connected to the master control output pin BOOT1 / PB2, and the source of the MOS tube G10 is connected to the step-down input pin in. The master control chip U1 is used to compare the voltage value of the sampling voltage with the set value, and if the voltage value of the sampling voltage is greater than the set value, the master control module 14 outputs a control signal, and the MOS tube G10 can be turned on based on the control signal. The step-down chip U18 performs a step-down operation on the first voltage, and the step-down chip U18 can generate a third voltage. Alternatively, the step-down chip performs a step-down operation on the second voltage, and the step-down chip U18 can generate a fourth voltage. The step-down output pin out is used to output the third voltage or the fourth voltage.

[0041] Please refer to Figure 3 and Figure 4 The boost module 16 includes a boost chip U19, and the model of the boost chip U19 is MT3608. The boost chip U19 includes a boost input pin in and a boost output pin sw, and the boost input pin in is connected to the step-down output pin out. The boost chip U19 is used to perform a boost operation on the third voltage or the fourth voltage, and the boost chip U19 generates a motor supply voltage, and the boost output pin sw is used to output the motor supply voltage. The boost module 16 is also provided with a resistor R66 and a resistor R67, and both the resistor R66 and the resistor R67 are high-precision resistors with an accuracy of 1%. The resistor R66 and the resistor R67 can constitute a voltage division feedback circuit, so that the motor supply voltage output by the boost chip is stably controlled at 15V.

[0042] Please refer to Figure 3 and Figure 5 The voltage conversion module 17 includes a voltage conversion chip U10. The voltage conversion chip U10 includes a voltage conversion input pin IN and a voltage conversion output pin OUT, and the voltage conversion input pin IN is connected to the step-down output pin out. The voltage conversion chip U10 is used to perform a voltage conversion operation on the third voltage or the fourth voltage, and the voltage conversion chip U10 can generate a chip supply voltage, and the voltage conversion output pin OUT is used to output the chip supply voltage.

[0043] Please refer to Figure 3The voltage reduction module 15 comprises a first diode D7 and a second diode D8. The positive pole of the first diode D7 is connected to the second input pin 19. The negative pole of the first diode D7 is connected to the drain of a MOS tube G10. The second diode D7 is connected in parallel with the first diode D8. The first diode D7 and the second diode D8 are used to prevent reverse charging of the backup power supply 12. The arrangement of the first diode D7 and the second diode D8 makes it difficult for reverse voltage to enter the backup power supply 12, effectively protecting the backup power supply 12 and prolonging the service life of the backup power supply 12. In addition, the barrier anti-power failure circuit 10 further comprises an MT9221 chip, which is a Hall current sampling chip. The MT9221 chip comprises an IP pin and an OUTP pin. The main control chip U1 comprises a current detection pin T3C4 / ADC9 / PB1. The IP pin is connected to the main power supply 11 through an input interface, and the OUTP pin is connected to the current detection pin T3C4 / ADC9 / PB1. The MT9221 chip can perform current sampling operation on the main power supply 11, so that the main control chip U1 can detect the output current of the main power supply 11.

[0044] Please refer to Figure 3 The voltage reduction module 15 further comprises a filtering unit 151 connected in parallel with the voltage reduction output pin. The filtering unit 151 is used to perform filtering operation on the third voltage or the fourth voltage. The filtering unit 151 comprises a first filtering capacitor G44 and a second filtering capacitor G45. The voltage reduction module 15 further comprises a protection unit 152 connected in parallel with the voltage reduction output pin out and used to protect the subsequent circuit, thereby avoiding damage to the subsequent circuit caused by large voltage generated by short circuit of the main power supply 11. The protection unit 152 comprises a fuse F6 and a transient voltage suppression diode D14. When the main power supply 11 is damaged, the arrangement of the protection unit 152 makes the main power supply 11 not directly short-circuit output, thereby preventing the motor Hall supplied by the third voltage and the chips supplied by the third voltage in the periphery from being damaged. Therefore, the protection unit 152 can further reduce the loss during decoupling protection.

[0045] The utility model discloses a working principle is: when parking area normal power supply, barrier gate can normally work, at this moment, main power supply 11 can output first voltage. Voltage sampling module 13 can carry out voltage division operation to first voltage, and voltage sampling module 13 can generate sampling voltage. Main control module 14 can compare the voltage value of sampling voltage with the size of setting, if the voltage value of sampling voltage is greater than setting, then main control module 14 outputs control signal. When the step-down module 15 receives control signal, the step-down module 15 carries out voltage reduction operation to first voltage, and the step-down module 15 can generate third voltage. The step-up module 16 can carry out voltage increase operation to third voltage, and the step-up module 16 generates motor supply voltage, and motor supply voltage is used to supply power for the drive motor inside barrier gate. Voltage conversion module 17 can carry out voltage conversion operation to third voltage, and voltage conversion module 17 can generate chip supply voltage, and chip supply voltage is used to supply power for the integrated circuit chip inside barrier gate.

[0046] When parking area abnormal power failure, spare power supply 12 can output second voltage. Main power supply 11 does not output first voltage, and therefore, voltage sampling module 13 does not generate sampling voltage. Therefore, if the voltage value of sampling voltage is less than setting, and then main control module 14 does not output control signal. When the step-down module 15 does not receive control signal, the step-down module 15 carries out voltage reduction operation to second voltage, and the step-down module 15 can generate fourth voltage. The step-up module 16 can carry out voltage increase operation to fourth voltage, and the step-up module 16 generates motor supply voltage, and motor supply voltage is used to supply power for the drive motor inside barrier gate. Voltage conversion module 17 can carry out voltage conversion operation to fourth voltage, and voltage conversion module 17 can generate chip supply voltage, and chip supply voltage is used to supply power for the integrated circuit chip inside barrier gate.

[0047] The utility model provides a barrier anti -power -down circuit, this barrier anti -power -down circuit includes main power supply, spare power supply, voltage sampling module, main control module, voltage reducing module, voltage increasing module, voltage conversion module. Main power supply can output first voltage, and spare power supply can output second voltage. Voltage sampling module can carry out voltage division operation to first voltage, and voltage sampling module can generate sampling voltage. Main control module can compare the voltage value of sampling voltage with the size of setting value, if the voltage value of sampling voltage is greater than setting value, then main control module outputs control signal. When voltage reducing module does not receive control signal, voltage reducing module carries out voltage reduction operation to first voltage, and voltage reducing module can generate third voltage. When voltage reducing module receives control signal, voltage reducing module carries out voltage reduction operation to second voltage, and voltage reducing module can generate fourth voltage. Voltage increasing module can carry out voltage increasing operation to third voltage or fourth voltage, and voltage increasing module can generate motor power supply voltage, and motor power supply voltage is used for supplying power for the drive motor inside barrier. Voltage conversion module can carry out voltage conversion operation to third voltage or fourth voltage, and voltage conversion module can generate chip power supply voltage, and chip power supply voltage is used for supplying power for the integrated circuit chip inside barrier. Therefore, when abnormal power failure, this barrier anti -power -down circuit can also convert second voltage of spare power supply into motor power supply voltage and chip power supply voltage, thereby maintaining the power supply to barrier. Effectively solve the technical problem that existing barrier cannot work under abnormal power failure. If the toll parking lot is installed with the barrier with the circuit, then can effectively avoid the loss caused by abnormal power failure. And, the barrier can also keep stable working state for a long time, and will not occur sudden power failure.

[0048] In conclusion, although the utility model has disclosed as above with preferred embodiments, the above preferred embodiments are not used to limit the utility model, and the ordinary skilled in the art can make various changes and decorations without departing from the spirit and scope of the utility model, therefore the protection scope of the utility model is the range defined by claims.

Claims

1. A barrier anti-brownout circuit, comprising: It includes, a main power supply for outputting a first voltage; a backup power supply for outputting a second voltage; a voltage sampling module connected to the main power supply for voltage dividing the first voltage to generate a sampling voltage; a main control module connected to the voltage sampling module for comparing the voltage value of the sampling voltage with a set value, and if the voltage value of the sampling voltage is greater than the set value, the main control module outputs a control signal; a voltage conversion module connected to the voltage sampling module, for voltage conversion operation on the third voltage or the fourth voltage to generate a chip supply voltage, the chip supply voltage is used for power supply for integrated circuit chip inside the barrier gate. The voltage sampling module includes a voltage sampling unit, the main control module includes a main control chip, the main control chip includes a main control input pin and a main control output pin, the voltage conversion module includes an input interface, a MOS tube and a voltage conversion chip, the input interface includes a first input pin and a second input pin, the voltage conversion chip includes a voltage conversion input pin and a voltage conversion output pin, one end of the voltage sampling unit is connected to the main power supply, the other end of the voltage sampling unit is connected to the main control input pin, and the voltage sampling unit is used for voltage dividing the first voltage to generate a sampling voltage; One end of the first input pin is connected to the main power supply, and the other end of the first input pin is connected to the voltage conversion input pin; one end of the second input pin is connected to the backup power supply, and the other end of the second input pin is connected to the drain of the MOS tube, the gate of the MOS tube is connected to the main control output pin, the main control chip is used for comparing the voltage value of the sampling voltage with a set value, and if the voltage value of the sampling voltage is greater than the set value, the main control module outputs a control signal, the MOS tube is used for conduction based on the control signal, the source of the MOS tube is connected to the voltage conversion input pin, the voltage conversion chip is used for voltage conversion operation on the first voltage to generate a third voltage, or the voltage conversion chip is used for voltage conversion operation on the second voltage to generate a fourth voltage, and the voltage conversion output pin is used for outputting the third voltage or the fourth voltage.

2. The barrier anti-brownout circuit of claim 1, wherein, The voltage conversion module includes a voltage conversion chip, the voltage conversion chip includes a voltage conversion input pin and a voltage conversion output pin, the voltage conversion input pin is connected to the voltage conversion output pin of the voltage conversion chip, and the voltage conversion chip is used for voltage conversion operation on the third voltage or the fourth voltage to generate a chip supply voltage. ​ 3. The barrier anti-brownout circuit of claim 2, wherein, ​ 4. The anti-brownout circuit for a barrier gate according to claim 2, wherein, The voltage conversion module comprises a voltage conversion chip, the voltage conversion chip comprises a voltage conversion input pin and a voltage conversion output pin, the voltage conversion input pin is connected to the step-down output pin, and the voltage conversion chip is configured to perform a voltage conversion operation on the third voltage or the fourth voltage to generate a chip supply voltage, and the voltage conversion output pin is configured to output the chip supply voltage.

5. The anti-brownout circuit for a barrier gate according to claim 2, wherein, The step-down module comprises a first diode and a second diode, the positive electrode of the first diode is connected to the second input pin, the negative electrode of the first diode is connected to the drain of the MOS tube, the second diode is connected in parallel with the first diode, and the first diode and the second diode are configured to prevent reverse charging of the backup power supply.

6. The anti-brownout circuit for a barrier gate according to claim 2, wherein, The step-down module further comprises a filtering unit, the filtering unit is connected in parallel with the step-down output pin, and the filtering unit is configured to perform a filtering operation on the third voltage or the fourth voltage.

7. The anti-brownout circuit for a barrier gate according to claim 2, wherein, The step-down module further comprises a protection unit, the protection unit is connected in parallel with the step-down output pin and is configured to perform a protection operation on a circuit at a rear stage, so as to avoid damage to the circuit at the rear stage caused by a large voltage generated by a short circuit of the main power supply.

8. The anti-brownout circuit for a barrier gate according to claim 2, wherein, The voltage sampling unit comprises a first sampling resistor and a second sampling resistor, one end of the first sampling resistor is connected to the main power supply, the other end of the first sampling resistor is connected to one end of the second sampling resistor, and the other end of the second sampling resistor is connected to the master control input pin.

9. The anti-brownout circuit for a barrier gate according to claim 3, wherein, The model of the step-down chip is LM2576, and the signal of the step-up chip is MT3608.

10. A barrier gate characterized by, The barrier gate anti-power-down circuit comprises the barrier gate anti-power-down circuit according to any one of claims 1-9. The barrier gate anti-power-down circuit comprises the barrier gate anti-power-down circuit according to any one of claims 1-9.

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