Infrared detection mower structure
Incorporating infrared probes for active obstacle detection in lawn mowers addresses passive collision issues, enhancing durability and reducing maintenance through proactive avoidance.
Patent Information
- Application Number
- CN202323638206.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2033-12-29
AI Technical Summary
Existing automatic lawn mowers passively collide with obstacles due to lack of active detection, leading to wear, damage, increased maintenance costs, and reduced service life.
Incorporating infrared probes on the lawn mower to actively detect obstacles and transmit data to an MCU circuit for proactive collision avoidance.
Reduces collisions, extends the machine's service life, and lowers maintenance costs by enabling proactive obstacle detection and avoidance.
Smart Images
Figure CN222280838U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lawn mowers, in particular to an infrared detection lawn mower structure. Background Art
[0002] With the rapid development of economy, the improvement of people's living standards and the improvement of environment, the demand for lawn is gradually increasing. With the development of society, more and more people have less and less time to mow the lawn due to busy work or aging. The elderly are increasingly unable to do it, and the high cost of manual mowing is also a burden on some people. The existing automatic lawn mower has a single obstacle avoidance function, which uses a collision method to passively detect obstacles. It has no active detection function. When encountering obstacles, it needs to hit them head-on, which is not a good experience. The machine will cause the device to wear and damage if it collides with obstacles for a long time, which increases the maintenance cost and reduces the service life of the machine. Summary of the invention
[0003] In order to solve the problem that existing automatic lawn mowers passively collide with obstacles, the utility model provides an infrared detection lawn mower structure, which can realize obstacle detection, reduce collisions, extend the use of the machine, reduce maintenance costs, and improve the mowing experience.
[0004] The technical scheme is as follows: an infrared detection lawn mower structure, which includes a cover body, characterized in that infrared probes are respectively installed in front and on both sides of the cover body, the infrared probe is connected to the MCU circuit through a transmission circuit, the transmission circuit, the MCU circuit, and the infrared probe are all connected to the power supply circuit, the MCU circuit includes an STM32F103C8T6 single-chip microcomputer U4, the transmission circuit includes four channels, each of the transmission circuits includes an operational amplifier U1 and an operational amplifier U2, the positive phase input end of the operational amplifier U1 is connected to the infrared probe, the output end of the operational amplifier U1 is connected to one end of a resistor R22 and one end of a resistor R24, the other end of the resistor R22 is connected to one end of a resistor R21 and the inverting input end of the operational amplifier U1, the other end of the resistor R21 is connected to one end of a resistor R20 and the positive phase input end of the operational amplifier U2, and the inverting input end of the operational amplifier U2 is connected A 1.2V power supply is connected, the output end of the operational amplifier U2 is connected to one end of a resistor R23 and the other end of the resistor R20, the other end of the resistor R23 is connected to one end of a resistor R25 and the inverting input end of the operational amplifier U3, the other end of the resistor R24 is connected to one end of a resistor R26 and the non-inverting input end of the operational amplifier U3, the output end of the operational amplifier U3 is connected to the other end of the resistor R25 and the 11th pin of the STM32F103C8T6 single-chip computer U4, and the other end of the resistor R26 is grounded; the MCU circuit is also connected to an infrared transmitting circuit, and the infrared transmitting circuit includes an infrared transmitting lamp U6, the positive electrode of the infrared transmitting lamp U6 is connected to the power supply VCC through a resistor R27, and the negative electrode is connected to the emitter of the transistor Q2, the collector of the transistor Q2 is grounded, and the base is connected to the 12th pin of the STM32F103C8T6 single-chip computer U4 through a resistor R19.
[0005] It is further characterized in that the power supply circuit includes two identical power supply circuits, one of which includes a voltage conversion chip U8, and the 7th pin of the voltage conversion chip U8 is connected to one end of the capacitor C18, one end of the capacitor C19, one end of the capacitor C20, and the power supply VCC, the 1st pin of the voltage conversion chip U8 is connected to one end of the capacitor C21, and the other end of the capacitor C21 is connected to one end of the transient suppression diode D2, one end of the inductor L1, and the 8th pin of the voltage conversion chip U8, and the other end of the capacitor C18, the other end of the capacitor C19, the other end of the capacitor C20, the 6th pin and the 9th pin of the voltage conversion chip U8. All are grounded, the other end of the inductor L1 is connected to one end of the capacitor C25, one end of the resistor R28, one end of the capacitor C23, one end of the capacitor C22, one end of the capacitor C24, one end of the resistor R30 and outputs the power supply VDD, the other end of the resistor R30 is connected to the positive electrode of the diode D1, the 4th pin of the voltage conversion chip U8 is connected to one end of the resistor R29 and the other end of the resistor R28, the other end of the transient suppression diode D2, the other end of the capacitor C25, the other end of the resistor R29, the other end of the capacitor C23, the other end of the capacitor C22, the other end of the capacitor C24, and the negative electrode of the diode D1 are all grounded.
[0006] After adopting the utility model, an infrared probe is added to the cover of the lawn mower, and the infrared probe is used to detect obstacles and transmit the information to the MCU circuit. After the MCU circuit processes the data, it transmits it to the main control of the automatic lawn mower, and the main control takes corresponding actions to avoid collision. BRIEF DESCRIPTION OF THE DRAWINGS
[0007] Figure 1 It is a schematic diagram of the structure of the utility model;
[0008] Figure 2 This is the schematic diagram of the MCU module of the utility model;
[0009] Figure 3 This is the principle diagram of the infrared probe and transmission circuit of the utility model;
[0010] Figure 4 This is the power supply circuit schematic. DETAILED DESCRIPTION
[0011] See Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, an infrared detection lawn mower structure includes a cover body 1, and infrared probes 2 are respectively installed in front and on both sides of the cover body 1. A total of four are designed to cover a large range in front. Each infrared probe is connected to an MCU circuit through a transmission circuit. The transmission circuit, the MCU circuit, and the infrared probe are all connected to a power supply circuit. The MCU circuit includes an STM32F103C8T6 single-chip computer U4. Four transmission circuits are correspondingly arranged. Each transmission circuit includes an operational amplifier U1 and an operational amplifier U2. The positive input end of the operational amplifier U1 is connected to the infrared probe LED1, the output end of the operational amplifier U1 is connected to one end of a resistor R22 and one end of a resistor R24, the other end of the resistor R22 is connected to one end of a resistor R21 and the inverting input end of the operational amplifier U1, the other end of the resistor R21 is connected to one end of a resistor R20 and the positive input end of the operational amplifier U2, the inverting input end of the operational amplifier U2 is connected to a 1.2V power supply, and the output end of the operational amplifier U2 is connected to one end of a resistor R23 And the other end of resistor R20, the other end of resistor R23 is connected to one end of resistor R25 and the inverting input end of operational amplifier U3, the other end of resistor R24 is connected to one end of resistor R26 and the non-inverting input end of operational amplifier U3, the output end of operational amplifier U3 is connected to the other end of resistor R25 and pin 11 of STM32F103C8T6 single-chip computer U4, and the other end of resistor R26 is grounded; the MCU circuit is also connected to the infrared transmitting circuit, the infrared transmitting circuit includes an infrared transmitting lamp U6, the positive electrode of the infrared transmitting lamp U6 is connected to the power supply VCC through resistor R27, the negative electrode is connected to the emitter of transistor Q2, the collector of transistor Q2 is grounded, and the base is connected to pin 12 of STM32F103C8T6 single-chip computer U4 through resistor R19, the infrared transmitting lamp is installed next to the infrared probe, and the remaining three transmission circuits and the corresponding infrared transmitting circuits are correspondingly connected to pins 13-17 and pin 29 of STM32F103C8T6 single-chip computer U4.
[0012] The power supply circuit includes two identical power supply circuits, which convert VCC into VDD and VSS respectively, and provide positive power and negative power to the operational amplifier respectively. Since the structures of the two circuits are the same, only one of them, namely, VCC into VDD, is introduced in detail. It includes a voltage conversion chip U8, model TPS5430DDAR, and the 7th pin of the voltage conversion chip U8 is connected to one end of capacitor C18, one end of capacitor C19, one end of capacitor C20, and power supply VCC. The 1st pin of the voltage conversion chip U8 is connected to one end of capacitor C21, and the other end of capacitor C21 is connected to one end of transient suppression diode D2, one end of inductor L1, and the 8th pin of the voltage conversion chip U8. The other end of capacitor C18 , the other end of capacitor C19, the other end of capacitor C20, and pins 6 and 9 of the voltage conversion chip U8 are all grounded, the other end of the inductor L1 is connected to one end of capacitor C25, one end of resistor R28, one end of capacitor C23, one end of capacitor C22, one end of capacitor C24, one end of resistor R30 and output the power supply VDD, the other end of resistor R30 is connected to the positive electrode of diode D1, pin 4 of the voltage conversion chip U8 is connected to one end of resistor R29 and the other end of resistor R28, the other end of transient suppression diode D2, the other end of capacitor C25, the other end of resistor R29, the other end of capacitor C23, the other end of capacitor C22, the other end of capacitor C24, and the negative electrode of diode D1 are all grounded.
[0013] In addition, a VDD to 1.2V circuit is included, which is implemented using the voltage regulator U10.
[0014] In the present application, an infrared probe is added to the cover of the lawn mower to detect obstacles in front. When obstacles appear, the automatic lawn mower can sense them in advance and avoid them in advance to prevent collisions.
Claims
1. An infrared detection lawn mower structure, comprising a housing body, characterized in that: Infrared probes are installed in front and on both sides of the cover body respectively. The infrared probes are connected to the MCU circuit through a transmission circuit. The transmission circuit, the MCU circuit and the infrared probe are all connected to the power supply circuit. The MCU circuit includes an STM32F103C8T6 single-chip computer U4. The transmission circuit includes four channels, each of which includes an operational amplifier U1 and an operational amplifier U2. The positive input end of the operational amplifier U1 is connected to the infrared probe, and the output end of the operational amplifier U1 is connected to one end of a resistor R22 and one end of a resistor R24. The other end of the resistor R22 is connected to one end of a resistor R21 and the inverting input end of the operational amplifier U1. The other end of the resistor R21 is connected to one end of a resistor R20 and the positive input end of the operational amplifier U2. The inverting input end of the operational amplifier U2 is connected to a 1.2V power supply. The output end of the operational amplifier U2 Connect one end of resistor R23 and the other end of the resistor R20, the other end of the resistor R23 is connected to one end of resistor R25 and the inverting input end of op amp U3, the other end of resistor R24 is connected to one end of resistor R26 and the non-inverting input end of op amp U3, the output end of op amp U3 is connected to the other end of resistor R25 and pin 11 of the STM32F103C8T6 single-chip computer U4, and the other end of resistor R26 is grounded; the MCU circuit is also connected to an infrared transmitting circuit, which includes an infrared transmitting lamp U6, the positive electrode of the infrared transmitting lamp U6 is connected to the power supply VCC through resistor R27, the negative electrode is connected to the emitter of transistor Q2, the collector of transistor Q2 is grounded, and the base is connected to pin 12 of the STM32F103C8T6 single-chip computer U4 through resistor R19.
2. The infrared detection lawn mower structure according to claim 1, characterized in that: The power supply circuit includes two identical power supply circuits, one of which includes a voltage conversion chip U8, model TPS5430DDAR, the 7th pin of the voltage conversion chip U8 is connected to one end of the capacitor C18, one end of the capacitor C19, one end of the capacitor C20, and the power supply VCC, the 1st pin of the voltage conversion chip U8 is connected to one end of the capacitor C21, the other end of the capacitor C21 is connected to one end of the transient suppression diode D2, one end of the inductor L1, and the 8th pin of the voltage conversion chip U8, the other end of the capacitor C18, the other end of the capacitor C19, the other end of the capacitor C20, and the 6th pin of the voltage conversion chip U8. Pins 4 and 9 are grounded, the other end of the inductor L1 is connected to one end of capacitor C25, one end of resistor R28, one end of capacitor C23, one end of capacitor C22, one end of capacitor C24, one end of resistor R30 and outputs the power supply VDD, the other end of the resistor R30 is connected to the positive electrode of diode D1, pin 4 of the voltage conversion chip U8 is connected to one end of resistor R29 and the other end of the resistor R28, the other end of the transient suppression diode D2, the other end of capacitor C25, the other end of resistor R29, the other end of capacitor C23, the other end of capacitor C22, the other end of capacitor C24, and the negative electrode of diode D1 are all grounded.