Current detection circuit of alternating current fan of sweeping robot

Abstract

The utility model discloses a current detection circuit of an alternating current fan of a sweeping robot, which comprises a signal acquisition module, a power supply module, a comparison module, a control module and a reminding module, and the signal acquisition module, the comparison module, the control module and the reminding module are electrically connected in sequence. The output end of the power supply module is electrically connected with the signal acquisition module and the comparison module. The signal acquisition module is used for acquiring a voltage signal of an alternating current fan of the sweeping robot and transmitting the voltage signal to the comparison module; the comparison module is used for comparing the voltage signal with a reference voltage signal and outputting a result signal to the control module; the control module is used for controlling a power management system of the alternating current fan to close power supply of the alternating current fan, and the control module transmits a result signal to the reminding module.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit detection, and particularly relates to a current detection circuit for an AC fan of a sweeping robot. Background Technique

[0002] With the development of electricity, more and more motor technologies and applications have been widely studied and promoted. The development of motor technology has greatly promoted the technological progress and application innovation in various fields. The application of motor technology in fields such as high-efficiency motors, intelligent control, electric vehicles, industrial automation, renewable energy, household appliances, and medical equipment not only improves the performance and efficiency of equipment but also promotes energy conservation, emission reduction, and sustainable development.

[0003] With the vigorous development of motor technology, people have put forward higher requirements for the safety performance of various products or fields composed of motors. The working principle of a motor is to convert electrical energy into mechanical energy, and then through mechanical devices to meet the needs of people's daily life or production requirements. Once a problem occurs in the mechanical device, it is very easy to cause a short circuit in the motor, resulting in a sudden increase in current and burning out electronic components. Content of the Utility Model

[0004] The purpose of the utility model is to provide a current detection circuit for an AC fan of a sweeping robot to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A current detection circuit for an AC fan of a sweeping robot includes a signal acquisition module, a power supply module, a comparison module, a control module, and a reminder module. The signal acquisition module, the comparison module, the control module, and the reminder module are electrically connected in sequence. The output end of the power supply module is electrically connected to the signal acquisition module and the comparison module respectively;

[0007] The signal acquisition module is used to collect the voltage signal of the AC fan of the sweeping robot and transmit the voltage signal to the comparison module;

[0008] The comparison module is used to compare the voltage signal with a reference voltage signal and output a result signal to the control module;

[0009] The control module is used to control the power management system of the AC fan to turn off the power supply of the AC fan, and the control module transmits the result signal to the reminder module.

[0010] Further technical solution: The power supply module includes a first external power supply and an integrated chip U11. The integrated chip U11 includes a Vin pin, a Vout pin, and a GND pin. The first external power supply is electrically connected to the Vin pin of the integrated chip U11. The Vout pin of the integrated chip U11 forms an intermediate node with the comparison module and the signal acquisition module. The integrated chip U11 is used for voltage reduction, and the GND pin of the integrated chip U11 is grounded.

[0011] Further technical solution: The signal acquisition module includes an integrated chip U10. The integrated chip U10 includes a plurality of IP+ pins and a plurality of IP- pins. The plurality of IP+ pins of the integrated chip U10 are electrically connected to the AC fan. The plurality of IP- pins of the integrated chip U10 are electrically connected to a second external power supply. The second external power supply, the AC fan, and the integrated chip U10 form a loop. The integrated chip U10 further includes a VCC pin and an OUT pin. The VCC pin of the integrated chip U10 is electrically connected to the Vout pin of the integrated chip U11. The OUT pin of the integrated chip U10 is electrically connected to the comparison module.

[0012] Further technical solution: The comparison module includes a voltage comparator U12-A, a resistor R49, a capacitor C16, and a resistor R50. The resistor R49 and the capacitor C16 are connected in series. The resistor R49 is electrically connected to the OUT pin of the integrated chip U10. The other end of the capacitor C16 is electrically connected to the positive input terminal of the voltage comparator U12-A. The positive terminal of the voltage comparator U12-A is electrically connected to the Vout pin of the integrated chip U11. The negative terminal of the voltage comparator U12-A is grounded. The negative input terminal of the voltage comparator U12-A is electrically connected to a resistor R51. The other end of the resistor R51 is grounded. The output terminal of the voltage comparator U12-A is electrically connected to a diode D5. The cathode of the diode D5 is electrically connected to the control module. The cathode of the diode D5 and the control module form a node. One end of the resistor R50 is electrically connected to the node, and the other end of the resistor R50 is electrically connected to the negative input terminal of the voltage comparator U12-A.

[0013] Further technical solution: The control module includes an MCU microprocessor. The MCU microprocessor is electrically connected to the cathode of the diode D5. The MCU microprocessor is electrically connected to the power management system of the AC fan and is also electrically connected to the reminder module.

[0014] Further technical solution: The reminder module includes a warning light and a buzzer. The warning light and the buzzer are connected in series, and the warning light, the buzzer and the MCU microprocessor are electrically connected.

[0015] Advantages of the present utility model:

[0016] The power supply module is used to supply power to the signal acquisition module and the comparison module. The signal acquisition module is used to acquire the signal of the AC fan and transmit the signal of the AC fan to the comparison module for comparison, so as to output a high-level or low-level signal to the control module. Therefore, the control module selectively outputs a signal to the power management system of the AC fan according to the input high-level or low-level signal, and further controls the opening and closing of the second external power supply for the AC fan. Usually, when the AC fan has a sudden situation such as a locked rotor, resulting in a sudden increase in current or other abnormal situations, the signal acquisition module can acquire the voltage signal and transmit the voltage signal to the comparison module. After passing through the comparison module, a low-level signal is output to the control module, and the control module closes the second external power supply through the power management system of the AC fan. At the same time, the control module will control the reminder module to give a reminder.

[0017] Other features and advantages of the present utility model will be described in detail in the subsequent specific implementation part. Description of the drawings

[0018] Figure 1 : The circuit diagram of the present utility model.

[0019] Reference numerals: 1. Signal acquisition module; 2. Power supply module; 3. Comparison module Specific implementation mode

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the drawings in the embodiments of the present utility model.

[0021] Please refer to Figure 1 ;

[0022] An alternating current detection circuit for a floor cleaning robot's AC fan, comprising a signal acquisition module 1, a power supply module 2, a comparison module 3, and a control module. The signal acquisition module 1, the comparison module 3, and the control module are electrically connected in sequence. In this embodiment, the output terminals of the power supply module 2 are respectively electrically connected to the signal acquisition module 1 and the comparison module 3. The power supply module 2 can supply power to the signal acquisition module 1 and the comparison module 3, enabling the signal acquisition module 1 and the comparison module 3 to operate normally. The signal acquisition module 1 is used to acquire the voltage signal when the floor cleaning robot's AC fan is operating normally and the voltage signal when the AC fan experiences current surges such as jams or other abnormal states. When the signal acquisition module 1 acquires the voltage signal, it can output the voltage signal to the comparison module 3. The comparison module 3 is used to receive the voltage signal output by the signal acquisition module 1, and the comparison module 3 can compare the input voltage signal and output a result signal to be transmitted to the control module. In this implementation, the result signal is preferably a high-level signal and a low-level signal. The control module can, according to the difference between the high-level signal or the low-level signal input by the comparison module 3, choose whether to output the signal to the power management system of the floor cleaning robot's AC fan, thereby cutting off the voltage input to the AC fan.

[0023] In order to quickly remind the user to cut off the voltage input to the AC fan when a fault occurs in the AC fan of the floor cleaning robot, the control module is electrically connected to a reminder module. The reminder module is used to send a reminder to the user immediately when the AC fan experiences a jam or other situations.

[0024] The working principle is as follows: The operator first ensures that the power supply module 2 can supply power to the signal acquisition module 1 and the comparison module 3 normally, enabling the signal acquisition module 1 and the comparison module 3 to operate normally. In the initial state, that is, when the AC fan is operating normally, the signal acquisition module 1 acquires the voltage signal of the AC fan when it is operating normally and transmits the voltage signal to the comparison module 3. The comparison module 3 receives the voltage signal, makes a comparison, and then outputs a high-level signal to the control module. After receiving the high-voltage signal, the control module does not react, enabling the AC fan to operate normally.

[0025] Conversely, when the AC fan is in an abnormal working state or suddenly fails, usually the current in the circuit will suddenly increase. The signal acquisition module 1 can acquire a second voltage signal. The second voltage signal is output to the comparison module 3 through the signal acquisition module 1. After receiving the second voltage signal, the comparison module 3 makes a comparison and outputs a low-voltage signal to the control module. After receiving the low-voltage signal, the control module reacts by controlling the power management system of the AC fan, causing the second external power supply to stop supplying power to the AC fan, that is, cutting off the power input terminal of the AC fan, thereby playing a role in protecting the circuit. At the same time, the control module will control the reminder module to issue a warning to remind the user that the AC fan has failed.

[0026] Referring to Figure 1 , in this embodiment, the power supply module 2 includes a first external power supply and an integrated chip U11. The first external power supply is a voltage of 12V. The integrated chip U11 includes a Vin pin, a Vout pin, and a GND pin. The first external power supply is electrically connected to the Vin pin of the integrated chip U11, so that the first external power supply can supply power to the integrated chip U11. The Vout pin of the integrated chip U11 forms an intermediate node with the comparison module 3 and the signal acquisition module 1. The GND pin of the integrated chip U11 is grounded. A capacitor C14 is electrically connected to the Vin pin of the integrated chip U11, and the other end of the capacitor C14 is grounded. A capacitor C15 is electrically connected to the Vout pin of the integrated chip U11, and the other end of the capacitor C15 is grounded. In this embodiment, the integrated chip U11 is used for voltage reduction, and the integrated chip U11 can convert the 12V voltage of the first external power supply into a 5V voltage to supply power to the comparison module 3 and the signal acquisition module 1.

[0027] Referring to Figure 1, in a preferred embodiment, the voltage of the second external power supply is usually 220V. The second external power supply is used to supply power to the AC fan. In this embodiment, the signal acquisition module 1 includes an integrated chip U10. The integrated chip U10 includes a number of IP+ pin terminals and a number of IP- pin terminals. A number of IP+ pin terminals of the integrated chip U10 are electrically connected to the AC fan, and a number of IP- pin terminals of the integrated chip U10 are electrically connected to the second external power supply. The second external power supply, the AC fan and the integrated chip U10 form a loop. The integrated chip U10 also includes a VCC pin terminal and an OUT pin terminal. The VCC pin terminal of the integrated chip U10 is electrically connected to the Vout pin terminal of the integrated chip U11, and the OUT pin terminal of the integrated chip U10 is electrically connected to the comparison module 3. In this embodiment, the comparison module 34 includes a voltage comparator U12-A, a resistor R49 and a capacitor C16. The resistor R49 and the capacitor C16 are connected in series. The resistor R49 is electrically connected to the OUT pin terminal of the integrated chip U10, and the other end of the capacitor C16 is electrically connected to the positive input terminal of the voltage comparator U12-A. The GND terminal of the integrated chip U10 is grounded; the voltage comparator U12-A is a voltage comparator of the LM358 model. This model has a wide application range and is widely used. A first node is formed between the positive input terminal of the voltage comparator U12-A and the capacitor C16. The capacitor C16 is electrically connected to a resistor R52. The input terminal of the resistor R52 is electrically connected to the first node, and the output terminal of the resistor R52 is grounded. The positive terminal of the voltage comparator U12-A is electrically connected to the Vout pin terminal of the integrated chip U11. The first external power supply can supply power to the voltage comparator U12-A through the integrated chip U11. The negative terminal of the voltage comparator U12-A is grounded. The negative input terminal of the voltage comparator U12-A is electrically connected to a resistor R51, and the other end of the resistor R51 is grounded. The output terminal of the voltage comparator U12-A is electrically connected to a diode D5. The cathode of the diode D5 is electrically connected to the control module. The cathode of the diode D5 and the control module form a node. A resistor R50 is electrically connected between this node and the negative input terminal of the voltage comparator U12-A, and a capacitor C17 is connected in parallel with the resistor R51. One end of the capacitor C17 is connected to the node formed by the cathode of the diode D5 and the control module, and the other end of the capacitor C17 is grounded;

[0028] Please continue to refer to Figure 1, in the control module of this embodiment, an MCU microprocessor is preferably used. The MCU microprocessor is electrically connected to the cathode of the diode D5, so that the output terminal of the voltage comparator U12-A can output a high-level signal or a low-level signal to the MCU microprocessor. The MCU microprocessor is electrically connected to the power management system of the AC fan. When an emergency occurs in the AC fan, the MCU microprocessor can transmit a signal to the power management system, so that the power management system can timely cut off the power supply of the AC fan, that is, the second external power supply; the reminder module includes a warning light and a buzzer. The warning light and the buzzer are connected in series, and the warning light, the buzzer and the MCU microprocessor are electrically connected. When an emergency occurs in the AC fan, the MCU microprocessor can timely control the warning light to light up and the buzzer to sound to remind the user to repair the AC fan.

[0029] The working principle is as follows: The operator first ensures that the first external power supply can supply power to the integrated chip U10 and the voltage comparator U12-A normally, so that the integrated chip U10 and the voltage comparator U12-A work normally; the first external power supply is 12V, and the voltage that can be converted into 5V through the integrated chip U11 supplies power to the integrated chip U10 and the voltage comparator U12-A; in the initial state, that is, when the AC fan is working normally, the integrated chip U10 collects the voltage signal when the AC fan is working normally, and the voltage signal passes through the OUT pin of the integrated chip U10, passes through the resistor R49 and the capacitor C16, and then is transmitted to the voltage comparator U12-A through the positive input terminal of the voltage comparator U12-A. It is worth noting that the negative input terminal of the voltage comparator U12-A is grounded through the resistor R51, and a resistor R50 is electrically connected between the negative input terminal of the voltage comparator U12-A and the node. When the voltage signal input by the integrated chip U10 is normal, the voltage comparator U12-A outputs a high-level signal to the MCU microprocessor after comparison. After receiving the high-level signal, the MCU microprocessor does not react, so that the AC fan can work normally;

[0030] On the contrary, when the AC fan is in abnormal operation or suddenly fails, the current in the circuit usually increases suddenly. The integrated chip U10 can collect a second voltage signal. The second voltage signal passes through the OUT pin of the integrated chip U10, passes through the resistor R49 and the capacitor C16, and then is transmitted to the voltage comparator U12-A through the positive input terminal of the voltage comparator U12-A. At this time, the voltage comparator U12-A outputs a low-level signal to the MCU microprocessor after comparison. After receiving the low-voltage signal, the MCU microprocessor will output a signal to the power management system of the AC fan to control the second external power supply to stop supplying power to the AC fan, that is, cut off the power input terminal of the AC fan, so as to play a role in protecting the circuit. At the same time, the MCU microprocessor will control the warning light to light up and the buzzer to sound to remind the user to repair the AC fan.

[0031] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

[0032] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An electric current detection circuit for an AC fan of a floor sweeping robot, comprising a signal acquisition module (1), a power supply module (2), a comparison module (3), a control module and a reminder module, characterized in that: The signal acquisition module (1), the comparison module (3), the control module and the reminder module are electrically connected in sequence, and the output terminals of the power supply module (2) are electrically connected to the signal acquisition module (1) and the comparison module (3) respectively; The signal acquisition module (1) is used to acquire the voltage signal of the AC fan of the floor sweeping robot and transmit the voltage signal to the comparison module (3); The comparison module (3) is used to compare the voltage signal with a reference voltage signal and output a result signal to the control module; The control module is used to control the power management system of the AC fan to cut off the power supply of the AC fan, and the control module also transmits the result signal to the reminder module.

2. The current detection circuit of an AC fan for a floor cleaning robot according to claim 1, wherein, The power supply module (2) includes a first external power supply and an integrated chip U11. The integrated chip U11 includes a Vin pin, a Vout pin and a GND pin. The first external power supply is electrically connected to the Vin pin of the integrated chip U11. The Vout pin of the integrated chip U11 forms an intermediate node with the comparison module (3) and the signal acquisition module (1). The integrated chip U11 is used for step-down, and the GND pin of the integrated chip U11 is grounded.

3. The current detection circuit of an AC fan for a floor sweeping robot according to claim 2, characterized in that The signal acquisition module (1) includes an integrated chip U10. The integrated chip U10 includes a plurality of IP+ pins and a plurality of IP- pins. The plurality of IP+ pins of the integrated chip U10 are electrically connected to the AC fan. The plurality of IP- pins of the integrated chip U10 are electrically connected to a second external power supply. The second external power supply, the AC fan and the integrated chip U10 form a loop. The integrated chip U10 also includes a VCC pin and an OUT pin. The VCC pin of the integrated chip U10 is electrically connected to the Vout pin of the integrated chip U11. The OUT pin of the integrated chip U10 is electrically connected to the comparison module (3).

4. The current detection circuit of an AC fan for a floor sweeping robot according to claim 3, wherein, The comparison module (3) includes a voltage comparator U12-A, a resistor R49, a capacitor C16, and a resistor R50. The resistor R49 is in series with the capacitor C16. The resistor R49 is electrically connected to the OUT pin of the integrated chip U10. The other end of the capacitor C16 is electrically connected to the non-inverting input terminal of the voltage comparator U12-A. The positive terminal of the voltage comparator U12-A is electrically connected to the Vout pin of the integrated chip U11. The negative terminal of the voltage comparator U12-A is grounded. The inverting input terminal of the voltage comparator U12-A is electrically connected to a resistor R51, and the other end of the resistor R51 is grounded. The output terminal of the voltage comparator U12-A is electrically connected to a diode D5. The cathode of the diode D5 is electrically connected to the control module. The cathode of the diode D5 and the control module form a node. One end of the resistor R50 is electrically connected to the node, and the other end of the resistor R50 is electrically connected to the inverting input terminal of the voltage comparator U12-A.

5. The current detection circuit of an AC fan for a floor sweeping robot according to claim 4, wherein, The control module includes an MCU microprocessor. The MCU microprocessor is electrically connected to the cathode of the diode D5. The MCU microprocessor is electrically connected to the power management system of the AC fan and is also electrically connected to the reminder module.

6. The current detection circuit of an AC fan for a floor cleaning robot according to claim 5, characterized in that, The reminder module includes a warning light and a buzzer. The warning light and the buzzer are in series. The warning light, the buzzer, and the MCU microprocessor are electrically connected.

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