Infrared sunlight interference resistant circuit and intelligent robot

Abstract

The utility model provides an infrared anti-sunlight interference circuit and an intelligent robot, and relates to the technical field of circuits, a voltage processing module can collect a first output voltage of an infrared receiving module after an infrared receiving lamp receives infrared light emitted by an infrared emitting lamp, and the first output voltage is combined with a target voltage to filter the interference of the infrared light in sunlight. Compared with the prior art, the infrared anti-sunlight interference circuit provided by the embodiment of the utility model can reduce the complexity of the structural design, the development difficulty and the anti-sunlight interference cost, and can enable the anti-sunlight interference capability of an intelligent robot applying the infrared technology to be stronger.

Description

Technical Field

[0001] This utility model relates to the field of circuit technology, and in particular to an infrared anti-sunlight interference circuit and an intelligent robot. Background Technology

[0002] With societal progress, smart robot products are increasingly entering ordinary households, and robotic vacuum cleaners, as one of the fastest-growing categories of smart robots in home applications, are becoming increasingly common.

[0003] Robotic vacuum cleaners intelligently avoid obstacles in their path, cleaning along edges or navigating cliffs, all requiring specific sensors. Infrared technology is widely used in cleaning robots, especially robotic vacuum cleaners, due to its cost advantage, for detecting obstacles, cleaning along edges, and navigating cliffs.

[0004] Infrared technology uses the wavelength of infrared light. Since sunlight also contains infrared light, it is easily interfered with under sunlight, causing the infrared receiver to fail and affecting detection accuracy. In outdoor scenarios, this can also lead to missed scans. To reduce interference from infrared light in sunlight, existing solutions typically add structural components to shield the infrared receiver or use optical lenses with concave and convex lenses to reduce the amount of sunlight entering and affecting the receiver.

[0005] However, implementing the existing solution will increase the design and manufacturing costs of the structure, may also result in a large number of defective products, increasing material costs, and will also have an adverse effect on the appearance of the machine. Utility Model Content

[0006] This invention provides an infrared anti-sunlight interference circuit and an intelligent robot to address the deficiencies in related technologies.

[0007] This utility model provides an infrared anti-sunlight interference circuit, including: an infrared emitting module, an infrared receiving module, and connected voltage processing module and control module;

[0008] The infrared emitting module includes a connected infrared emitting lamp and an infrared emitting circuit. The infrared emitting circuit includes a connected constant current source circuit and a power regulation circuit. The constant current source circuit and the power regulation circuit are respectively connected to the output port of the control module.

[0009] The infrared receiving module includes an infrared receiving lamp and an infrared receiving circuit connected together. The infrared receiving lamp is connected to the input port of the control module and the voltage processing module respectively.

[0010] The voltage processing module is used to collect the first output voltage of the infrared receiving module after the infrared receiving lamp receives the infrared light emitted by the infrared emitting lamp;

[0011] The control module is used to receive the first output voltage and filter out the interference of infrared light in sunlight based on the difference between the first output voltage and the target voltage; the target voltage is the output voltage of the infrared receiving module when the infrared emitting lamp is turned off.

[0012] According to the infrared anti-sunlight interference circuit provided by this utility model, the control module is further configured to output a first control signal to the constant current source circuit, and receive a second output voltage from the infrared receiving module when the infrared emitting lamp is turned off, and output a second control signal to the power adjustment circuit based on the second output voltage.

[0013] According to the present invention, an infrared anti-sunlight interference circuit is provided, wherein the infrared receiving circuit includes a Zener diode, a Zener resistor, and a first voltage divider resistor;

[0014] The negative terminal of the Zener diode is connected to the emitter of the infrared receiving lamp;

[0015] The positive terminal of the Zener diode is grounded through the Zener resistor;

[0016] One end of the first voltage divider resistor is connected to the negative terminal of the Zener diode, and the other end of the first voltage divider resistor is grounded.

[0017] According to the present invention, an infrared anti-sunlight interference circuit is provided, wherein the voltage processing module includes a connected isolation capacitor and an operational amplifier circuit;

[0018] The isolation capacitor is connected to the emitter of the infrared receiving lamp, and the operational amplifier circuit is connected to the control module;

[0019] The isolation capacitor is used to acquire the first output voltage;

[0020] The operational amplifier circuit is used to amplify the first output voltage.

[0021] According to the present invention, an infrared anti-sunlight interference circuit is provided, wherein the constant current source circuit includes a current limiting resistor, a first transistor, a second transistor, and a second voltage divider resistor;

[0022] The current-limiting resistor is used to connect the first control signal;

[0023] The second voltage divider resistor is connected to the power regulation circuit;

[0024] The current-limiting resistor is connected to the base of the first transistor and the collector of the second transistor, respectively.

[0025] The collector of the first transistor is connected to the negative terminal of the infrared emitting lamp, the emitter of the first transistor and the base of the second transistor are both connected to the second voltage divider resistor, and the emitter of the second transistor is grounded.

[0026] According to the infrared anti-sunlight interference circuit provided by this utility model, the emission power of the infrared emitting lamp is determined by the resistance value of the second voltage divider resistor and adjusted based on the frequency of the second control signal.

[0027] According to the present invention, an infrared anti-sunlight interference circuit is provided, wherein the operational amplifier circuit includes a first filter circuit, an amplifier, and a second filter circuit.

[0028] The first filter circuit is connected to the isolation capacitor;

[0029] The non-inverting input terminal of the amplifier is connected to the first filter circuit;

[0030] The inverting input terminal of the amplifier is connected to a grounding resistor and is connected to the output terminal of the amplifier through a feedback resistor.

[0031] The output of the amplifier is connected to the control module through the second filter circuit.

[0032] According to the infrared anti-sunlight interference circuit provided by this utility model, the operational amplifier circuit further includes a first diode and a second diode;

[0033] The positive terminal of the first diode is grounded, the negative terminal of the first diode is connected to the positive terminal of the second diode, and the negative terminal of the second diode is connected to the power supply voltage.

[0034] Both the second filter circuit and the control module are connected to the negative terminal of the first diode.

[0035] According to the present invention, an infrared anti-sunlight interference circuit is provided, wherein the power adjustment circuit includes a first adjustment resistor, a second adjustment resistor, and an adjustment capacitor;

[0036] Both the first regulating resistor and the second regulating resistor are connected to the constant current source circuit;

[0037] The first regulating resistor and the regulating capacitor are connected in parallel and both are grounded;

[0038] The second regulating resistor is used to connect the second control signal.

[0039] According to the infrared anti-sunlight interference circuit provided by this utility model, the frequency of the second control signal is adjusted between a first frequency threshold and a second frequency threshold.

[0040] The first frequency threshold and the second frequency threshold are determined based on the resistance value of the first regulating resistor, the resistance value of the second regulating resistor, and the capacitance value of the regulating capacitor.

[0041] This utility model also provides an intelligent robot, including: a robot body and the above-mentioned infrared anti-sunlight interference circuit;

[0042] The infrared anti-sunlight interference circuit is built into the robot body.

[0043] The infrared anti-sunlight interference circuit and intelligent robot provided by this utility model can collect the first output voltage of the infrared receiving module after the infrared receiving lamp receives the infrared light emitted by the infrared emitting lamp through the voltage processing module, and combine it with the target voltage to filter the interference of infrared light in sunlight. Compared with the prior art, the infrared anti-sunlight interference circuit provided in the embodiments of this utility model can reduce the complexity of structural design, reduce the development difficulty and the cost of anti-sunlight interference, and make the intelligent robot using infrared technology more resistant to sunlight interference. Attached Figure Description

[0044] To more clearly illustrate the technical solutions in this utility model or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 This is one of the structural schematic diagrams of the infrared anti-sunlight interference circuit provided by this utility model.

[0046] Figure 2 This is the second schematic diagram of the infrared anti-sunlight interference circuit provided by this utility model.

[0047] Figure 3 This is one of the structural schematic diagrams of the infrared receiving module in the infrared anti-sunlight interference circuit provided by this utility model.

[0048] Figure 4 This is the second schematic diagram of the infrared receiving module in the infrared anti-sunlight interference circuit provided by this utility model.

[0049] Figure 5 This is a schematic diagram of the infrared emitting module in the infrared anti-sunlight interference circuit provided by this utility model.

[0050] Figure 6 This is a schematic diagram of the back-end circuit of the infrared receiving module in the infrared anti-sunlight interference circuit provided by this utility model.

[0051] Figure 7 This is a structural schematic diagram of the intelligent robot provided by this utility model. Detailed Implementation

[0052] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0053] To reduce interference from infrared light in sunlight, existing technologies typically involve adding structural components to block the infrared receiver or using optical lenses with concave and convex lenses to minimize sunlight's impact on the receiver. This not only increases design and manufacturing costs but can also lead to a large number of defective products, increasing material costs and negatively affecting the machine's appearance. Therefore, this invention provides an infrared anti-sunlight interference circuit that can be applied to intelligent robots to prevent interference from infrared light in sunlight.

[0054] Figure 1 This is a schematic diagram of an infrared anti-sunlight interference circuit provided in an embodiment of this utility model, as shown below. Figure 1 As shown, the infrared anti-sunlight interference circuit includes an infrared emitting module 1, an infrared receiving module 2, and connected voltage processing module 3 and control module 4.

[0055] The infrared emitting module 1 includes an infrared emitting lamp D1 and an infrared emitting circuit 11 connected to it. The infrared emitting circuit 11 includes a constant current source circuit 111 and a power adjustment circuit 112 connected to it. The constant current source circuit 111 and the power adjustment circuit 112 are respectively connected to the output port of the control module 4.

[0056] The infrared receiving module 2 includes an infrared receiving lamp D2 and an infrared receiving circuit 21 connected together. The infrared receiving lamp D2 is connected to the input port of the control module 4 and the voltage processing module 3 respectively.

[0057] The voltage processing module 3 is used to collect the first output voltage of the infrared receiving module 2 after the infrared receiving lamp D2 receives the infrared light emitted by the infrared emitting lamp D1;

[0058] The control module 4 is used to receive the first output voltage and filter the interference of infrared light in sunlight based on the difference between the first output voltage and the preset voltage; the target voltage is the output voltage of the infrared receiving module when the infrared emitting lamp is turned off.

[0059] Specifically, the infrared anti-sunlight interference circuit provided in this embodiment of the present invention includes an infrared emitting module 1 comprising an infrared emitting lamp D1 and an infrared emitting circuit 11. The infrared emitting lamp D1 is a light-emitting diode that emits infrared light. The infrared emitting circuit 11 provides power to the infrared emitting lamp D1. The infrared emitting circuit 11 may include a power supply, which can be connected to the positive terminal of the infrared emitting lamp D1. The power supply voltage can be 5V or other values.

[0060] The infrared emitting circuit 11 may include a constant current source circuit 111 and a power adjustment circuit 112 connected together. The constant current source circuit 111 can provide a stable emission power for the infrared emitting lamp D1, and the power adjustment circuit 112 can make the emission power of the infrared emitting lamp D1 adjustable. The constant current source circuit 111 and the power adjustment circuit 112 are respectively connected to the output ports of the control module 4. The control module 4 can be connected to the constant current source circuit 111 through the first output port to output a first control signal to the constant current source circuit 111. Through the first control signal, the infrared emitting lamp D1 can be controlled to turn on or off.

[0061] The control module 4 can be connected to the power adjustment circuit 112 through the second output port to output a second control signal to the power adjustment circuit 112. The transmission power of the infrared emitting lamp D1 can be controlled by the second control signal.

[0062] Here, control module 4 can be a microcontroller or a system-on-chip (SoC). Both the first control signal and the second control signal can be AC ​​signals, such as pulse width modulation (PWM) signals in sinusoidal or square wave form. Therefore, the first control signal can be represented as PWM1 and the second control signal can be represented as PWM2.

[0063] The infrared receiving module 2 includes an infrared receiving lamp D2 and an infrared receiving circuit 21. The infrared emitting lamp D1 can be a phototransistor, with its base serving as the infrared light receiving window. The infrared receiving lamp D2 can receive infrared light, which can be either the infrared light emitted by the infrared emitting lamp D1 or the infrared light from sunlight.

[0064] The infrared receiving circuit 21 supplies power to the infrared receiving lamp D2. The infrared receiving circuit 21 may include a power supply, which can be connected to the collector c of the infrared receiving lamp D2. The power supply voltage can be 5V or other values. Pulling the collector c of the infrared receiving lamp D2 directly up to 5V from the power supply increases the voltage of the infrared receiving lamp D2, making it less susceptible to saturation due to sunlight.

[0065] The infrared receiver lamp D2 is connected to the input port of the control module 4 and the voltage processing module 3 respectively. The input port of the control module 4 can be an analog-to-digital converter (ADC) interface. The control module 4 can be connected to the emitter of the infrared receiver lamp D2 through the first input port (ADC1) and receive the second output voltage of the infrared receiver module 2 when the infrared transmitter lamp D1 is turned off through ADC1.

[0066] The control module 4 can also be connected to the voltage processing module 3 through the second input port (ADC2) to receive the first output voltage of the infrared receiving module 2 after the infrared receiving lamp D2 receives the infrared light emitted by the infrared emitting lamp D1.

[0067] Here, since the infrared emitting lamp D1 is switched on and off under the control of the second control signal from the control module 4, if the infrared receiving lamp D2 receives the infrared light emitted by the infrared emitting lamp D1, the output voltage of the infrared receiving module is the first output voltage, which is an AC voltage. However, sunlight is continuous illumination; if the infrared receiving lamp D2 receives the infrared light from sunlight, the output voltage of the infrared receiving module is a DC voltage. Therefore, the voltage processing module 3 can utilize the difference between AC and DC voltages to obtain the first output voltage. In other words, if the voltage processing module 3 has an output, it means that the infrared receiving lamp D2 is receiving the infrared light emitted by the infrared emitting lamp D1.

[0068] To filter out interference from infrared light in sunlight, the output voltage of the voltage processing module 3 when the infrared emitting lamp D1 is off can be determined and used as the target voltage. The difference between the first output voltage and the target voltage can then be calculated. This difference is the voltage after filtering out the interference from infrared light in sunlight and can be used for subsequent applications. For example, if this infrared anti-sunlight interference circuit is applied to an intelligent robot, the control module can compare this difference with a voltage threshold and determine whether the intelligent robot has encountered an obstacle or stairs based on the comparison result.

[0069] The infrared anti-sunlight interference circuit provided in this embodiment includes: an infrared emitting module, an infrared receiving module, and connected voltage processing and control modules. The voltage processing module can collect the first output voltage of the infrared receiving module after the infrared light emitted by the infrared emitting lamp is received by the infrared receiving lamp, and combine it with a target voltage to filter interference from infrared light in sunlight. Compared with existing technologies, the infrared anti-sunlight interference circuit provided in this embodiment can reduce the complexity of structural design, lower development difficulty, and reduce the cost of anti-sunlight interference, thus enhancing the anti-sunlight interference capability of intelligent robots using infrared technology.

[0070] Based on the above embodiments, such as Figure 2 As shown, the control module 4 is also used to output a first control signal to the constant current source circuit 111, and receive the second output voltage of the infrared receiving module 2 when the infrared emitting lamp is turned off, and output a second control signal to the power adjustment circuit 112 based on the second output voltage.

[0071] Specifically, the control module 4 can output a first control signal to the constant current source circuit 111 to control the infrared emitting lamp D1 to turn off, and determine the output voltage of the voltage processing module 3 as the target voltage.

[0072] The control module 4 can also receive the second output voltage of the infrared receiving module 2 when the infrared emitting lamp D1 is off. If the second output voltage is 0, it indicates that the infrared receiving lamp D2 is not affected by sunlight. If the second output voltage is greater than 0, it indicates that the infrared light in the external sunlight will affect the infrared receiving lamp D2. In this case, a second control signal can be output to the power adjustment circuit 112. For example, by increasing the frequency of the second control signal, the current of the infrared emitting lamp D1 can be adjusted, the total impedance of the power adjustment circuit 112 can be reduced, and the emission power of the infrared emitting lamp D1 can be increased, thereby improving the sunlight resistance of the infrared anti-sunlight interference circuit.

[0073] In this embodiment of the invention, the control module receives the second output voltage of the infrared receiving module when the infrared emitting lamp is off, and can output a second control signal to the power adjustment circuit to improve the sunlight resistance of the infrared anti-sunlight interference circuit.

[0074] Based on the above embodiments, such as Figure 3 As shown, the infrared receiving circuit 2 includes a Zener diode D3, a Zener resistor R21, and a first voltage divider resistor R22;

[0075] The negative terminal of the Zener diode D3 is connected to the emitter e of the infrared receiver D2;

[0076] The positive terminal of the Zener diode D3 is grounded through the Zener resistor R21;

[0077] One end of the first voltage divider resistor R22 is connected to the negative terminal of the Zener diode D3, and the other end of the first voltage divider resistor R22 is grounded.

[0078] Specifically, the infrared receiving circuit 2 may include a 5V power supply, which can provide a 5V power supply voltage and is connected to the collector c of the infrared receiving lamp D2.

[0079] The emitter e of the infrared receiver lamp D2 also serves as the output terminal of the infrared receiver circuit 2, which can be connected to the first input port of the control module 4 or to the voltage processing module 3.

[0080] In this embodiment of the invention, by utilizing the equivalent capacitance characteristics of the Zener diode D3, the infrared receiving lamp D2, which is outside a certain frequency range, fails to generate a reverse bias current on the Zener diode D3. Meanwhile, the current generated by the infrared receiving lamp D2, which is affected by sunlight, can be stabilized within the supply voltage range by the Zener diode D3, thereby improving the circuit's ability to resist sunlight interference.

[0081] Based on the above embodiments, such as Figure 4 As shown, the voltage processing module 3 includes a connected isolation capacitor C1 and an operational amplifier circuit 31;

[0082] The isolation capacitor C1 is connected to the emitter e of the infrared receiving lamp D2, and the operational amplifier circuit 31 is connected to the control module 4;

[0083] The isolation capacitor C1 is used to collect the first output voltage;

[0084] The operational amplifier circuit 31 is used to amplify the first output voltage.

[0085] In this embodiment of the invention, the isolation capacitor C1 can filter out the DC voltage caused by sunlight through a voltage waveform of a specific frequency using the principle of capacitive coupling, and collect the first output voltage and transmit it to the operational amplifier circuit 31 so that the operational amplifier circuit 31 can amplify the first output voltage.

[0086] Based on the above embodiments, such as Figure 5 As shown, the constant current source circuit 111 includes a current limiting resistor R11, a first transistor Q1, a second transistor Q2, and a second voltage divider resistor R12;

[0087] The current-limiting resistor R11 is used to connect the first control signal PWM1;

[0088] The second voltage divider resistor R12 is connected to the power regulation circuit 112;

[0089] The current-limiting resistor R11 is connected to the base b of the first transistor Q1 and the collector c of the second transistor Q2, respectively.

[0090] The collector c of the first transistor Q1 is connected to the negative terminal of the infrared emitting lamp D1. The emitter e of the first transistor Q1 and the base b of the second transistor Q2 are both connected to the second voltage divider resistor R12. The emitter e of the second transistor Q2 is grounded.

[0091] The infrared emitting lamp D1 can be turned on or off by the constant current source circuit 111.

[0092] By adjusting the resistance of the second voltage divider resistor R12, the emission power of the infrared emitter D1 can be controlled, allowing it to operate at a constant emission power. The emission power of the infrared emitter D1 can be adjusted by the frequency of the second control signal PWM2.

[0093] Based on the above embodiments, such as Figure 5 As shown, the power regulation circuit 112 includes a first regulating resistor R13, a second regulating resistor R14, and a regulating capacitor C2;

[0094] Both the first regulating resistor R13 and the second regulating resistor R14 are connected to the constant current source circuit 111;

[0095] The first regulating resistor R13 and the regulating capacitor C2 are connected in parallel and both are grounded;

[0096] The second regulating resistor R14 is used to connect the second control signal PWM2.

[0097] The frequency of the second control signal PWM2 is adjusted between the first frequency threshold f1 and the second frequency threshold f2;

[0098] Both the first frequency threshold f1 and the second frequency threshold f2 are determined based on the resistance value r13 of the first regulating resistor R13, the resistance value r14 of the second regulating resistor R14, and the capacitance value C of the regulating capacitor C2.

[0099] The formula for calculating the first frequency threshold f1 can be: .

[0100] The formula for calculating the second frequency threshold f2 can be: .

[0101] Based on the above embodiments, such as Figure 6 As shown, the operational amplifier circuit 31 includes a first filter circuit 311, an amplifier U1A, and a second filter circuit 312;

[0102] The first filter circuit 311 is connected to the isolation capacitor C1;

[0103] The non-inverting input terminal of the amplifier U1A is connected to the first filter circuit 311;

[0104] The inverting input terminal of the amplifier U1A is connected to a grounding resistor R31, and is connected to the output terminal of the amplifier U1A through a feedback resistor R32.

[0105] The output terminal of the amplifier U1A is connected to the second input port ADC2 of the control module 4 through the second filter circuit 312.

[0106] like Figure 6 As shown, a grounding resistor R33 is also connected between the first filter circuit 311 and the isolation capacitor C1. The power input terminal of amplifier U1A is connected to a power supply, which can have a voltage of 5V. The power input terminal of amplifier U1A can also be grounded through the isolation capacitor C3.

[0107] The first filter circuit 311 may include a first filter resistor R34 and a first filter capacitor C4. The first filter resistor R34 is connected between the isolation capacitor C1 and the non-inverting input terminal of the amplifier U1A. The non-inverting input terminal of the amplifier U1A is grounded through the first filter capacitor C4.

[0108] The second filter circuit 312 may include a second filter resistor R35 and a second filter capacitor C5. The second filter resistor R35 is connected between the output terminal of amplifier U1A and the second input port ADC2 of control module 4. The output terminal of amplifier U1A is grounded through the second filter capacitor C5.

[0109] High-frequency interference in the operational amplifier circuit 31 can be filtered out by the first filter circuit 311 and the second filter circuit 312.

[0110] Based on the above embodiments, such as Figure 6 As shown, the operational amplifier circuit 31 also includes a first diode D31 and a second diode D32;

[0111] The anode of the first diode D31 is grounded, and the cathode of the first diode D31 is connected to the anode of the second diode D32. The cathode of the second diode D32 is connected to a power supply voltage, which can be 3.3V.

[0112] Both the second filter circuit 312 and the control module 4 are connected to the negative terminal of the first diode D31.

[0113] Based on the above embodiments, such as Figure 6As shown, the infrared anti-sunlight interference circuit also includes a third diode D33 and a fourth diode D34;

[0114] The positive terminal of the third diode D33 is grounded, the negative terminal of the third diode D33 is connected to the positive terminal of the fourth diode D34, and the negative terminal of the fourth diode D34 is connected to a power supply voltage, which can be 3.3V.

[0115] The emitter of the infrared receiver lamp D2 is connected to the negative terminal of the third diode D33.

[0116] Based on the above embodiments, such as Figure 7 As shown, this utility model embodiment also provides an intelligent robot, including: a robot body 61 and an infrared anti-sunlight interference circuit 62 provided in the above embodiments;

[0117] The infrared anti-sunlight interference circuit 62 is built into the robot body 61 and can be used to guide the movement of the robot body 61.

[0118] This intelligent robot can be a sweeping robot, a cleaning robot, or other intelligent device that uses infrared technology to detect obstacles.

[0119] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0120] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the parts that contribute to the related technology, can be embodied in the form of software products. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0121] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An infrared anti-sunlight interference circuit, characterized by comprising: include: Infrared transmitting module, infrared receiving module, and connected voltage processing module and control module; The infrared emitting module includes a connected infrared emitting lamp and an infrared emitting circuit. The infrared emitting circuit includes a connected constant current source circuit and a power regulation circuit. The constant current source circuit and the power regulation circuit are respectively connected to the output port of the control module. The infrared receiving module includes an infrared receiving lamp and an infrared receiving circuit connected together. The infrared receiving lamp is connected to the input port of the control module and the voltage processing module respectively. The voltage processing module is used to collect the first output voltage of the infrared receiving module after the infrared receiving lamp receives the infrared light emitted by the infrared emitting lamp; The control module is used to receive the first output voltage and filter out the interference of infrared light in sunlight based on the difference between the first output voltage and the target voltage; the target voltage is the output voltage of the infrared receiving module when the infrared emitting lamp is turned off.

2. The infrared sunlight rejection circuit of claim 1, wherein, The control module is also used to output a first control signal to the constant current source circuit, and to receive a second output voltage from the infrared receiving module when the infrared emitting lamp is off, and to output a second control signal to the power adjustment circuit based on the second output voltage.

3. The infrared sunlight rejection circuit of claim 1, wherein, The infrared receiving circuit includes a Zener diode, a Zener resistor, and a first voltage divider resistor; The negative terminal of the Zener diode is connected to the emitter of the infrared receiving lamp; The positive terminal of the Zener diode is grounded through the Zener resistor; One end of the first voltage divider resistor is connected to the negative terminal of the Zener diode, and the other end of the first voltage divider resistor is grounded.

4. The infrared anti-sunlight interference circuit according to claim 1, characterized in that, The voltage processing module includes a connected isolation capacitor and an operational amplifier circuit; The isolation capacitor is connected to the emitter of the infrared receiving lamp, and the operational amplifier circuit is connected to the control module; The isolation capacitor is used to acquire the first output voltage; The operational amplifier circuit is used to amplify the first output voltage.

5. The infrared sunlight rejection circuit of claim 2, wherein, The constant current source circuit includes a current-limiting resistor, a first transistor, a second transistor, and a second voltage-dividing resistor; The current-limiting resistor is used to connect the first control signal; The second voltage divider resistor is connected to the power regulation circuit; The current-limiting resistor is connected to the base of the first transistor and the collector of the second transistor, respectively. The collector of the first transistor is connected to the negative terminal of the infrared emitting lamp, the emitter of the first transistor and the base of the second transistor are both connected to the second voltage divider resistor, and the emitter of the second transistor is grounded.

6. The infrared sunlight rejection circuit of claim 5, wherein, The emission power of the infrared emitting lamp is determined by the resistance value of the second voltage divider resistor and is adjusted based on the frequency of the second control signal.

7. The infrared sunlight rejection circuit of claim 4, wherein, The operational amplifier circuit includes a first filter circuit, an amplifier, and a second filter circuit. The first filter circuit is connected to the isolation capacitor; The non-inverting input terminal of the amplifier is connected to the first filter circuit; The inverting input terminal of the amplifier is connected to a grounding resistor and is connected to the output terminal of the amplifier through a feedback resistor. The output of the amplifier is connected to the control module through the second filter circuit.

8. The infrared sunlight rejection circuit of claim 7, wherein, The operational amplifier circuit also includes a first diode and a second diode; The positive terminal of the first diode is grounded, the negative terminal of the first diode is connected to the positive terminal of the second diode, and the negative terminal of the second diode is connected to the power supply voltage. Both the second filter circuit and the control module are connected to the negative terminal of the first diode.

9. The infrared sunlight rejection circuit of claim 2, wherein, The power regulation circuit includes a first regulating resistor, a second regulating resistor, and a regulating capacitor; Both the first regulating resistor and the second regulating resistor are connected to the constant current source circuit; The first regulating resistor and the regulating capacitor are connected in parallel and both are grounded; The second regulating resistor is used to connect the second control signal.

10. The infrared sunlight rejection circuit of claim 9, wherein, The frequency of the second control signal is adjusted between a first frequency threshold and a second frequency threshold; The first frequency threshold and the second frequency threshold are determined based on the resistance value of the first regulating resistor, the resistance value of the second regulating resistor, and the capacitance value of the regulating capacitor.

11. An intelligent robot, characterized in that, include: The robot body and the infrared anti-sunlight interference circuit as described in any one of claims 1-10; The infrared anti-sunlight interference circuit is built into the robot body.

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