CN201813670U

CN201813670U - Infrared sowing detecting device

Info

Publication number: CN201813670U
Application number: CN2010201643015U
Authority: CN
Inventors: 谢方平; 李旭; 刘大为; 孙松林; 蒋蘋; 吴明亮
Original assignee: Hunan Agricultural University
Current assignee: Hunan Agricultural University
Priority date: 2010-04-21
Filing date: 2010-04-21
Publication date: 2011-05-04
Anticipated expiration: 2020-04-21

Abstract

The utility model relates to an infrared sowing detecting device, which consists of a microcontroller, an infrared emission circuit, an infrared detection circuit, a buzzer sound alarm circuit and a liquid crystal display (LCD) circuit. A control unit of the detecting device is a 8-bit microcontroller, a power circuit consists of voltage stabilization modules and provides stable +5V voltage for a system through capacitor filtering, an infrared tube is adopted in the infrared emission circuit, signals are modulated into 38kHz infrared carrier signals by a timer of the microcontroller, and the infrared carrier signals are output from a P2.7 port, amplified through a transistor, and sent by an infrared emission tube. An infrared receiving module is the core of an infrared receiving circuit, the receiving module is a receiver integrating infrared signal receiving and amplifying, the center receiving frequency is 38kHz, TTL (Transistor Transistor Logic) level is output, high level is output at ordinary times, and when code signals are received, low level is output. The infrared sowing detecting device precisely controls the signals through the microcontroller, and has a simple and stable mechanical structure, and the circuit design is reasonable.

Description

Infrared seeding monitoring device

Technical field

The utility model relates to monitoring device, is specially a kind of infrared tube that utilizes seeding quantity is carried out precise metering, and give sowing mechanism with feedback information, realizes the real-time monitoring device of sowing.

Background technology

Sowing is a link very important in the agricultural production process, and along with the development of seeding technique, seeding method, seeder implement are constantly changing.In recent years, along with carrying out of precision agriculture, the precise sowing technology has obtained great development, and secret sower has become the developing direction of modern seeding technique.And in the process of seeding operation, because of its totally enclosed characteristics, the operator can't directly monitor its operation quality, thereby when technology troubles such as generation kind of a case emptying, grain tube obstruction, seeding unit fault or plough obstruction, the pipe that all can cause sowing can not normally be sowed and cause the broadcast leakage phenomenon, thereby causes the agriculture underproduction.

At present, the used monitoring device of sower mainly contains three kinds: mechanical type alarm, electromechanical alarm and electronic monitoring and control system.The mechanical type alarm is the typical case with jingle bell formula seeding fault alarm, is obstructed when blocking at seeding unit, utilize hand hammer to knock the bell cover and send the sound and realize reporting to the police, but because the noise and the ambient noise of machine self are very big, so poor effect.Compare with the mechanical type alarm, the dynamoelectric signal warning device on the seeding unit of electromechanical warning device such as Britain S870 type Precision Seeding machine not only can audible alarm, can also carry out indicator lamp and report to the police.Its principle is when the seeding band normally rotates, utilize the periodicity conducting of sheet metal on the roller and contact and make indicator lamp periodically glittering, motionless or suddenly neglect slowly when fast when the seeding band that breaks down, then indicator lamp is normal bright or also do not work or irregular glittering, and expression should be checked.Along with development of electronic technology, electronic monitoring and control system begins to be applied to modern the sowing in the testing agency, and it is made of sensor, change-over circuit, warning circuit and signal display apparatus.The effect of sensor is that the mobility status with seed in the grain tube is transformed into the signal of telecommunication.At present photoelectric sensor or piezoelectricity acoustoelectric sensors of adopting more, the former utilizes in the seed decline process interdicts light beam, makes photoelectric conversion device output electric pulse signal; The latter is converted to electric impulse signal with the ping that whereabouts seed mechanical collision produces.The electric impulse signal that the change-over circuit receiving sensor produces drives warning circuit to relevant treatment such as signal amplify and reports to the police and show on display unit.

The mechanical type of comparing alarm and electromechanical alarm, the faster sensitivity of electronic monitoring type alarm response speed is higher, but remains aspect two further perfect.One, accuracy of detection.No matter be to adopt photo-electric or piezoelectricity acoustoelectric sensor, in the sowing process, all might occur many seeds simultaneously or break time extremely short pass through sensor, then may cause flase drop to be surveyed and the precision of influence detection.Its two, can't realize automatic compensation.When the pipe of sowing can not normally be sowed, monitoring system gave the alarm, because there is certain speed in car self, can cause certain broadcast leakage, replay before the operator proposes car test and looks into.Therefore, the structure of necessary improvement checkout gear is to improve the work quality of sower, and the automatic compensation function that enriches checkout gear is to improve the automation and the intelligent level of sower.

The utility model content

The purpose of this utility model is providing a kind of infrared seeding monitoring device, to solve the deficiency in the background technology.

The infrared seeding checkout gear is by single-chip microcomputer, the infrared emission circuit, infrared circuit, buzzer sound warning circuit and LCD liquid crystal display circuit are formed, the control module of described checkout gear adopts 8 single-chip microcomputers, power circuit is made of Voltage stabilizing module, what the infrared emission circuit adopted is infrared tube, timer by single-chip microcomputer is modulated into the infrared carrier signal of 38kHz, export by the P2.7 mouth, amplify through triode, send by infrared emission tube, the infrared receiving circuit core is an infrared receiving module, receiver module is that the collection infrared signal receives the receiver that is enlarged into one, and described warning circuit connects yowl buzzer and single-chip microcomputer.

The technical scheme that infrared seeding monitoring device adopted is: adopt part flow arrangement in the pipe of sowing, promptly connect three smaller parallel branches of diameters pipe of sowing in total pipe exit of sowing, every branch pipe of sowing is equipped with infrared detecting device, planting grain shunts by circular cone through the junction time, reduced on the physical arrangement that to plant grain parallel by the sow probability of tube sensor of branch, thereby improved precision, in conjunction with one chip microcomputer is that single-chip microcomputer is powerful, cost is low, volume is little, the characteristics of being convenient to install, utilize single-chip microcomputer to sensor, conversion line and warning system are monitored, the sensitivity of monitoring system and the performance of system works have further been improved, the quantity that shows sowing in real time, when breaking down, receive warning system and send signal, single-chip microcomputer can start automatic compensation function in real time, as the braking of motor and the startup of spare unit etc.Can significantly reduce and leak kind of a loss that causes, improve the intelligent level of sower.

The infrared seeding checkout gear is by single-chip microcomputer, the infrared emission circuit, infrared circuit, buzzer sound warning circuit and LCD liquid crystal display circuit are formed, the control module of this checkout gear adopts 8 single-chip microcomputers, power circuit is made of Voltage stabilizing module, through capacitor filtering, stable+5V voltage is provided to system, what the infrared emission circuit adopted is infrared tube, timer by single-chip microcomputer is modulated into the infrared carrier signal of 38kHz, export by the P2.7 mouth, amplify through triode, sent by infrared emission tube, the infrared receiving circuit core is an infrared receiving module, receiver module is that the collection infrared signal receives the receiver that is enlarged into one, its center receive frequency is 38kHz, is output as Transistor-Transistor Logic level, exports high level at ordinary times, after receiving coded signal, output low level.Warning circuit has utilized the yowl buzzer, and two pins are respectively both positive and negative polarity, and described warning circuit connects yowl buzzer and single-chip microcomputer, and after positive and negative end added 5v voltage, buzzer sent sound.The LCD liquid crystal display circuit adopts the P1 mouth of TC1602 module and single-chip microcomputer to be connected and realizes showing.

After the sowing checkout gear powers on, single-chip microcomputer starts timer conter 0 and begins counting, counter is single upwards counter, produces in the full back of counting and overflows interruption, and every generation once interrupts just changing the level state of a P2.7 pin, thereby produce the square-wave signal of 38kHz at the P2.7 pin, amplify through triode, drive infrared transmitting tube and send infrared signal, when gutless grain is managed by sowing, infrared receiving tube is accepted infrared signal, output low level always; As grain by the time then blocked the transmission of infrared signal, adopter output high level.Utilize the external interrupt of change triggers single-chip microcomputer of level of the output of infrared receiving tube, thereby realize kind of a grain counting, and showing kind of a grain number by the LCD LCD, kind grain number that will pass through and the number that presets kind of grain compare can judge whether broadcast leakage.If, then think obstruction taken place, single-chip microcomputer P2.6 output low level, buzzer warning if gutless grain passes through in the time of setting.

Beneficial effect:

The utility model square tube is crossed single-chip microcomputer can make signal precisely controlled, when improving the sowing accuracy of detection, utilize LCD liquid crystal display mode, can clearly know sowing information, when broadcast leakage occurring and blocking, utilize sound to realize in time reporting to the police, the frame for movement simple and stable, circuit design is reasonable.

Description of drawings:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is an electrical schematic diagram of the present utility model;

Primary clustering annex among the figure: 1 infrared emission circuit, 2 single-chip microcomputers, 3 power circuits, 4 buzzer sound warning circuits, 5 infrared receiving circuits, 6 LCDs.

Embodiment

Following example is used to illustrate the utility model, but does not constitute restriction of the present utility model.As shown in Figure 1, the infrared seeding checkout gear is made up of infrared emission circuit 1, single-chip microcomputer 2, power circuit 3, buzzer sound warning circuit 4, infrared receiving circuit 5, LCD 6.

As shown in Figure 2, control single chip computer Unit 2 of this checkout gear adopt 8 single-chip microcomputer 89c51, power circuit 3 is made of the REG1117-5 Voltage stabilizing module, through capacitor filtering, stable+5V voltage is provided to system, what infrared emission circuit 1 adopted is infrared tube, timer by 89c51 is modulated into the infrared carrier signal of 38kHz, by the output of P2.7 mouth, amplify through triode, send by infrared emission tube.Infrared receiving circuit 5 cores are infrared receiving modules, and receiver module is that the collection infrared signal receives the receiver that is enlarged into one, and its center receive frequency is 38kHz, is output as Transistor-Transistor Logic level, exports high level at ordinary times, after receiving coded signal, and output low level.Warning circuit has utilized 4, two pins of buzzer sound warning circuit to be respectively both positive and negative polarity, and after positive and negative end added 5v voltage, buzzer sent sound.The LCD liquid crystal display circuit adopts the P1 mouth of TC1602 module and single-chip microcomputer to be connected and realizes showing.

After the sowing checkout gear powers on, 89c51 starts timer conter 0 and begins counting, counter is single upwards counter, overflow interruption in counting full back generation, every generation once interrupts just changing the level state of a P2.7 pin, thereby the square-wave signal at P2.7 pin generation 38kHz amplifies through triode, drives infrared transmitting tube and sends infrared signal.When gutless grain was managed by sowing, infrared receiving circuit 5 was accepted infrared signal, output low level by infrared receiving tube always; As grain by the time then blocked the transmission of infrared signal, adopter output high level.Utilize the external interrupt of change triggers single-chip microcomputer 2 of level of the output of infrared receiving tube, thereby realize kind of a grain counting, and showing kind of grain numbers by LCD LCD 6, kind grain number that will pass through and the number that presets kind of grain compare can judge whether broadcast leakage.If, then think obstruction taken place, single-chip microcomputer P2.6 output low level, buzzer warning if gutless grain passes through in the time of setting.

More than show and described basic principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. the infrared seeding checkout gear is by single-chip microcomputer, the infrared emission circuit, infrared circuit, buzzer sound warning circuit and LCD liquid crystal display circuit are formed, it is characterized in that, the control module of described checkout gear adopts 8 single-chip microcomputers, power circuit is made of Voltage stabilizing module, what the infrared emission circuit adopted is infrared tube, timer by single-chip microcomputer is modulated into the infrared carrier signal of 38kHz, export by the P2.7 mouth, amplify through triode, send by infrared emission tube, the infrared receiving circuit core is an infrared receiving module, and receiver module is that the collection infrared signal receives the receiver that is enlarged into one, and described warning circuit connects yowl buzzer and single-chip microcomputer.