CN106681943B - Device for preventing motor operation from interfering data acquisition serial port transmission - Google Patents

Device for preventing motor operation from interfering data acquisition serial port transmission Download PDF

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Publication number
CN106681943B
CN106681943B CN201611157785.9A CN201611157785A CN106681943B CN 106681943 B CN106681943 B CN 106681943B CN 201611157785 A CN201611157785 A CN 201611157785A CN 106681943 B CN106681943 B CN 106681943B
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China
Prior art keywords
motor
serial port
relay
fixed contact
usb
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CN201611157785.9A
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CN106681943A (en
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苏洋
曾庆喜
袁华彬
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/40—Bus structure
    • G06F13/4063—Device-to-bus coupling
    • G06F13/4068—Electrical coupling
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/10—Program control for peripheral devices
    • G06F13/102—Program control for peripheral devices where the programme performs an interfacing function, e.g. device driver
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Control Of Electric Motors In General (AREA)
  • Information Transfer Systems (AREA)

Abstract

The invention relates to a device for preventing motor operation from interfering data acquisition serial port transmission, which comprises a relay, a USB (universal serial bus) serial port chip, a motor and a microcontroller; the input loop of the relay is respectively connected with the power supply and the positive electrode of the motor, and the microcontroller is used for controlling the switching of the power supply; the output loop of the relay comprises a movable contact, a first fixed contact and a second fixed contact, wherein the movable contact is grounded through a resistor, the first fixed contact is connected with the grounding end of the USB serial port chip, the second fixed contact is connected with the negative electrode of the motor, and the movable contact of the relay is normally closed with the first fixed contact. The circuit has a simple structure, and can avoid the situation that when the upper computer is not separated from the electric control equipment, the electric control equipment operates to start the lower computer, and the lower computer generates an uncertain signal after operating and influences the operation of the upper computer through a USB (universal serial bus) to serial port connected with the upper computer.

Description

Device for preventing motor operation from interfering data acquisition serial port transmission
Technical Field
The invention relates to a device for preventing motor operation from interfering data acquisition serial port transmission.
Background
Electronic control devices with motors are becoming more and more popular, and these devices usually need to be connected to a host computer such as a computer or a mobile phone through a USB-to-serial port to set them. In practical engineering, when the upper computer is not separated from the electric control equipment, i.e. the equipment is operated to start the lower computer, the lower computer often generates an uncertain signal after operation and influences the operation of the upper computer through a USB (universal serial bus) to serial port connected with the upper computer, and the upper computer can generate the dead halt and other consequences when serious.
Disclosure of Invention
The invention aims to: aiming at the prior art, a device for preventing the operation of a motor from interfering the transmission of a data acquisition serial port is provided, and the influence of the operation of a lower computer on an upper computer is prevented from being generated when the upper computer is not timely separated from electric control equipment from a physical layer.
The technical scheme is as follows: the device for preventing the motor operation from interfering the data acquisition serial port transmission comprises a relay, a USB (universal serial bus) to serial port chip, a motor and a microcontroller; the input loop of the relay is respectively connected with the power supply and the positive electrode of the motor, and the microcontroller is used for controlling the switching of the power supply; the output loop of the relay comprises a movable contact, a first fixed contact and a second fixed contact, wherein the movable contact is grounded through a resistor, the first fixed contact is connected with the grounding end of the USB serial port chip, the second fixed contact is connected with the negative electrode of the motor, and the movable contact of the relay is normally closed with the first fixed contact.
Further, the motor also comprises a diode, wherein the anode of the diode is connected with the anode of the motor, and the cathode of the diode is connected with the power supply.
The beneficial effects are that: the device for preventing the motor operation from interfering the data acquisition serial port transmission is simple in structure, and can avoid the situation that when the upper computer is not separated from the electric control equipment, the electric control equipment is operated to start the lower computer, and the lower computer generates an uncertain signal after operation and affects the operation of the upper computer through the USB to serial port connected with the upper computer.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
The invention is further explained below with reference to the drawings.
As shown in fig. 1, a device for preventing the operation of a motor from interfering with the transmission of a data acquisition serial port comprises a relay HK4100, a USB-to-serial port chip CH340G, a water pump motor M and a microcontroller, wherein the microcontroller can be a processor such as a single-chip microcomputer. One end of an input loop of the relay HK4100 is connected with an external power supply through a current limiting resistor R1, and the other end of the input loop is connected with the positive electrode of the water pump motor M. The microcontroller is connected with an external power supply and used for controlling the opening and closing of the external power supply. The output loop of the relay HK4100 comprises a movable contact, a first fixed contact and a second fixed contact, wherein the movable contact is grounded through a grounding resistor R2, the first fixed contact is connected with the grounding end GND of the USB serial port chip CH340G, the second fixed contact is connected with the power negative electrode of the water pump motor M, and the movable contact of the relay HK4100 is normally closed with the first fixed contact.
The circuit part further includes a diode IN4007, the anode of which is connected to the anode of the motor, and the cathode of which is connected to an external power source. The diode is a follow current diode of a relay, is used for protecting other elements from breakdown or burning by induced voltage in a circuit, is connected to two ends of the element of the relay for generating induced electromotive force in a parallel connection mode, and forms a loop with the element, so that high electromotive force generated by the diode is consumed in the loop in a continuous current mode, and the effect of protecting the elements in the circuit from being damaged is achieved.
In the circuit, the microcontroller is used as a component part of electric control equipment of the motor, and can be in communication connection with an upper computer such as a mobile phone, a computer and other equipment through the USB (universal serial bus) to facilitate the upper computer to set motor control. When the circuit of the invention works, the microcontroller controls the on and off time of the external power supply according to the setting of the upper computer, so that the motor operates according to the set requirement.
When the external power supply is turned off, the movable contact of the relay HK4100 is normally closed with the first stationary contact, namely, the grounding end GND of the USB-to-serial port chip CH340G is grounded through the grounding resistor R2, and the microcontroller can normally perform data communication with the upper computer at this moment, and the water pump motor M is in a stop running state.
When the microcontroller controls an external power supply to output electric energy, and current passes through an input loop of the relay, a movable contact of the relay acts, is disconnected with a first fixed contact and is closed with a second fixed contact; the external power supply is connected to the power supply anode of the motor through the input loop of the relay HK4100, then is grounded after the movable contact of the relay HK4100 is connected with the second stationary contact, a circuit loop is formed, and the motor starts to normally run. At this time, since the movable contact of the relay is disconnected from the first stationary contact, the ground end GND of the USB-to-serial chip CH340G is not grounded, the USB-to-serial chip CH340G cannot work normally, and at this time, the controller cannot perform data communication with the upper computer; therefore, an uncertain signal generated during the operation of the motor cannot be transmitted back to the upper computer through the microcontroller and the USB-to-serial port chip, and the influence of the operation of the lower computer on the upper computer is avoided.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims (2)

1. The utility model provides a prevent that motor from operation from interfering device of data acquisition serial ports transmission which characterized in that: the device comprises a relay, a USB-to-serial port chip, a motor and a microcontroller; the input loop of the relay is respectively connected with the power supply and the positive electrode of the motor, and the microcontroller is used for controlling the switching of the power supply; the output loop of the relay comprises a movable contact, a first fixed contact and a second fixed contact, wherein the movable contact is grounded through a resistor, the first fixed contact is connected with the grounding end of the USB serial port chip, the second fixed contact is connected with the negative electrode of the motor, and the movable contact of the relay is normally closed with the first fixed contact; the microcontroller is used as a component part of electric control equipment of the motor, and can be in communication connection with the upper computer through the USB-to-serial port chip.
2. The apparatus for preventing motor operation from interfering with data acquisition serial port transmission of claim 1, wherein: the motor also comprises a diode, wherein the positive electrode of the diode is connected with the positive electrode of the motor, and the negative electrode of the diode is connected with the power supply.
CN201611157785.9A 2016-12-15 2016-12-15 Device for preventing motor operation from interfering data acquisition serial port transmission Active CN106681943B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611157785.9A CN106681943B (en) 2016-12-15 2016-12-15 Device for preventing motor operation from interfering data acquisition serial port transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611157785.9A CN106681943B (en) 2016-12-15 2016-12-15 Device for preventing motor operation from interfering data acquisition serial port transmission

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CN106681943A CN106681943A (en) 2017-05-17
CN106681943B true CN106681943B (en) 2023-06-09

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5418678A (en) * 1993-09-02 1995-05-23 Hubbell Incorporated Manually set ground fault circuit interrupter
WO2005074241A1 (en) * 2004-01-29 2005-08-11 Tyco Electronics Argentina Sa Overvoltage protection in telephone/data lines, suitable for installations with low-quality earth connections
CN101276488A (en) * 2008-03-26 2008-10-01 中国科学院电工研究所 Vehicular recording instrument capable of implementing intelligent CAN bus communication
CN101520764A (en) * 2008-02-25 2009-09-02 福建星网锐捷通讯股份有限公司 System for directly using serial signal control device
CN206322156U (en) * 2016-12-15 2017-07-11 南京航空航天大学 A kind of device for preventing motor operation from disturbing data acquisition Serial Port Transmission

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5418678A (en) * 1993-09-02 1995-05-23 Hubbell Incorporated Manually set ground fault circuit interrupter
WO2005074241A1 (en) * 2004-01-29 2005-08-11 Tyco Electronics Argentina Sa Overvoltage protection in telephone/data lines, suitable for installations with low-quality earth connections
CN101520764A (en) * 2008-02-25 2009-09-02 福建星网锐捷通讯股份有限公司 System for directly using serial signal control device
CN101276488A (en) * 2008-03-26 2008-10-01 中国科学院电工研究所 Vehicular recording instrument capable of implementing intelligent CAN bus communication
CN206322156U (en) * 2016-12-15 2017-07-11 南京航空航天大学 A kind of device for preventing motor operation from disturbing data acquisition Serial Port Transmission

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