Infrared matrix detection system applied to mower

Abstract

The utility model relates to the technical field of hay mowers, in particular to an infrared matrix detection system applied to a hay mower, which is simple in structure, capable of detecting obstacles and low in use cost, and comprises a shell arranged at the position of a hay mower head, an infrared emitter LED1 and an infrared receiver module arranged in a matrix are arranged on the shell, and the infrared receiver module is connected with the infrared emitter LED1. The circuit structures of the infrared receiver modules are the same, the infrared receiver modules and the infrared emitter LED1 are connected with a single-chip microcomputer U5, one infrared receiver module comprises an operational amplifier U7.1, the positive phase input end of the operational amplifier U7.1 is connected with one end of a resistor R19, the other end of the resistor R19 is connected with the positive electrode of an infrared photodiode LED2, and the positive electrode of the infrared photodiode LED2 is connected with the positive electrode of the single-chip microcomputer U5. The negative electrode of the infrared photodiode LED2 is connected with a 5V power supply, the output end of the operational amplifier U7.1 is connected with one end of a resistor R17 and the fifth pin of the single chip microcomputer U5, the other end of the resistor R17 is connected with one end of a resistor R18 and the inverted input end of the operational amplifier U7.1, and the other end of the resistor R18 is grounded.

Description

Technical Field

[0001] The utility model relates to the technical field of lawn mowers, in particular to an infrared matrix detection system applied to lawn mowers. Background Art

[0002] Smart lawn mowers can autonomously complete the task of mowing the lawn without direct human control and operation, and have low power consumption, low noise, exquisite and beautiful appearance, which greatly reduces manual operation. They are becoming more and more popular, especially those suitable for lawn mowing and maintenance in home courtyards, public green spaces and other places. They have automatic walking function, prevent collision, prevent line outage within range, automatically return to charge, and have functions such as safety detection and battery power detection. Among them, anti-collision is very important, which can effectively prevent the lawn mower from colliding with obstacles and causing damage. The existing anti-collision device has a complex structure and high cost. Summary of the invention

[0003] In order to solve the above technical problems, the utility model provides an infrared matrix detection system applied to a lawn mower, which has a simple structure, can realize obstacle detection, and has low use cost.

[0004] The technical solution is as follows: an infrared matrix detection system applied to a lawn mower, characterized in that it includes a shell installed at the front position of the lawn mower, on which an infrared transmitter LED1 and infrared receiver modules arranged in a matrix are installed, each of the infrared receiver modules has the same circuit structure and is connected to a single-chip computer U5 with model STM32G473CBT6 as the infrared transmitter LED1, one of the infrared receiver modules includes an operational amplifier U7.1, the non-inverting input end of the operational amplifier U7.1 is connected to one end of a resistor R19, the other end of the resistor R19 is connected to the positive electrode of an infrared photodiode LED2, the negative electrode of the infrared photodiode LED2 is connected to a 5V power supply, the output end of the operational amplifier U7.1 is connected to one end of a resistor R17 and pin 5 of the single-chip computer U5, the other end of the resistor R17 is connected to one end of a resistor R18 and the inverting input end of the operational amplifier U7.1, and the other end of the resistor R18 is grounded.

[0005] It is further characterized in that the positive electrode of the infrared transmitter LED1 is connected to a 5V power supply through a resistor R16, the negative electrode is connected to the drain end of the MOS tube Q1, the source end of the MOS tube Q1 is grounded, the gate end is connected to one end of the resistor R15, and the other end of the resistor R15 is connected to the 22nd pin of the single chip computer U5;

[0006] The infrared transmitter LED1 is arranged in the middle of the housing, and the infrared receiver modules include two groups and are respectively arranged on both sides of the infrared transmitter LED1, and each group of the infrared receiver modules is composed of ten infrared receiver modules arranged in a matrix;

[0007] The bottom of the housing is provided with a mounting bracket, and an external data cable with a connector H1 is provided on the mounting bracket;

[0008] A light filter is arranged in front of the infrared receiver module;

[0009] A gyroscope module is arranged in the shell.

[0010] After adopting the utility model, the infrared transmitter LED1 at the front position of the lawn mower is used to emit infrared light, which is then received by the infrared receiver modules arranged in a matrix, so that the function of infrared obstacle recognition is achieved, the use safety of the lawn mower is improved, the overall mechanical structure and circuit structure are simple, and the use cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 This is the schematic diagram of the microcontroller circuit;

[0013] Figure 3 This is the schematic diagram of the power module circuit;

[0014] Figure 4 It is the circuit schematic diagram of infrared transmitter and infrared receiver;

[0015] Figure 5 This is the schematic diagram of the gyroscope module circuit. DETAILED DESCRIPTION

[0016] See Figures 1 to 5 As shown, an infrared matrix detection system for a lawn mower includes a housing 2 installed at the front of the lawn mower, an infrared transmitter 3 and infrared receiver modules 1 arranged in a matrix are installed on the housing 2, each infrared receiver module 1 has the same circuit structure and is connected to a single chip microcomputer U5 with a model of STM32G473CBT6 as the infrared transmitter 3, one infrared receiver module 1 includes an operational amplifier U7.1, a non-inverting input terminal of the operational amplifier U7.1 is connected to one end of a resistor R19, and the other end of the resistor R19 is connected to an infrared photodiode LE The positive pole of D2 and the negative pole of the infrared photodiode LED2 are connected to a 5V power supply, the output end of the operational amplifier U7.1 is connected to one end of the resistor R17 and the 5th pin of the single-chip microcomputer U5, the other end of the resistor R17 is connected to one end of the resistor R18 and the inverting input end of the operational amplifier U7.1, and the other end of the resistor R18 is grounded; the positive pole of the infrared transmitter LED1 is connected to a 5V power supply through a resistor R16, and the negative pole is connected to the drain end of the MOS tube Q1, the source end of the MOS tube Q1 is grounded, and the gate end is connected to one end of the resistor R15, and the other end of the resistor R15 is connected to the 22nd pin of the single-chip microcomputer U5.

[0017] The infrared transmitter 3 is disposed in the middle of the housing 2 . The infrared receiver modules 1 include two groups and are disposed on both sides of the infrared transmitter 3 . Each group of infrared receiver modules 1 is composed of ten infrared receiver modules arranged in a matrix.

[0018] The infrared transmitter 3 emits infrared light, and the infrared receiver module 1 receives the infrared signal reflected by the obstacle in front to understand the distance of the obstacle.

[0019] A mounting bracket 4 is provided at the bottom of the housing 2 , and an external data line 5 with a connector H1 is provided on the mounting bracket 4 , and the connector H1 is connected to pins 32 and 33 of the single-chip computer U5 .

[0020] A light filter is arranged in front of the infrared receiver module 1 to filter out unusable light to prevent stray light from being received and causing misjudgment.

[0021] A gyroscope module is also provided in the shell 2. The gyroscope module includes pins 23 and 24 of the gyroscope U2 connected to pins 41 and 42 of the microcontroller U5. The current posture state can be determined. When encountering a special state, short-term data processing can be performed to prevent misjudgment in front.

[0022] The power module provides power for the entire module and is composed of a voltage regulator chip U6, wherein the diode D1 is a power indicator light, the connector H1 is used for external communication, and the connector H2 is used for program downloading.

Claims

1. An infrared matrix detection system for a lawn mower, characterized in that: It includes a shell installed at the front position of the lawn mower, on which an infrared transmitter LED1 and infrared receiver modules arranged in a matrix are installed. The circuit structure of each infrared receiver module is the same and is connected to the single-chip microcomputer U5 as the infrared transmitter LED1. The model of the single-chip microcomputer U5 is STM32G473CBT6. One of the infrared receiver modules includes an operational amplifier U7.

1. The positive input end of the operational amplifier U7.1 is connected to one end of a resistor R19, the other end of the resistor R19 is connected to the positive electrode of an infrared photodiode LED2, the negative electrode of the infrared photodiode LED2 is connected to a 5V power supply, the output end of the operational amplifier U7.1 is connected to one end of a resistor R17 and pin 5 of the single-chip microcomputer U5, the other end of the resistor R17 is connected to one end of a resistor R18 and the inverting input end of the operational amplifier U7.1, and the other end of the resistor R18 is grounded.

2. The infrared matrix detection system for lawn mower according to claim 1, characterized in that: The positive electrode of the infrared transmitter LED1 is connected to a 5V power supply through a resistor R16, and the negative electrode is connected to the drain end of the MOS tube Q1. The source end of the MOS tube Q1 is grounded, and the gate end is connected to one end of the resistor R15. The other end of the resistor R15 is connected to pin 22 of the microcontroller U5.

3. The infrared matrix detection system for lawn mower according to claim 1, characterized in that: The infrared transmitter LED1 is arranged in the middle of the housing, the infrared receiver modules include two groups and are respectively arranged on both sides of the infrared transmitter LED1, and each group of the infrared receiver modules is composed of ten infrared receiver modules arranged in a matrix.

4. The infrared matrix detection system for a lawn mower according to claim 1, characterized in that: A mounting bracket is disposed at the bottom of the housing, and an external data cable with a connector H1 is disposed on the mounting bracket.

5. The infrared matrix detection system for lawn mower according to claim 1, characterized in that: A light filter is arranged in front of the infrared receiver module.

6. The infrared matrix detection system for lawn mower according to claim 1, characterized in that: A gyroscope module is arranged in the shell.

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