CN114967560A - Communication interface circuit with low power consumption control - Google Patents
Communication interface circuit with low power consumption control Download PDFInfo
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- CN114967560A CN114967560A CN202210634965.0A CN202210634965A CN114967560A CN 114967560 A CN114967560 A CN 114967560A CN 202210634965 A CN202210634965 A CN 202210634965A CN 114967560 A CN114967560 A CN 114967560A
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- 238000004891 communication Methods 0.000 title claims abstract description 44
- 238000002955 isolation Methods 0.000 claims abstract description 28
- 238000006243 chemical reaction Methods 0.000 claims abstract description 4
- 230000003287 optical effect Effects 0.000 claims description 14
- 230000003068 static effect Effects 0.000 claims description 6
- 102100039435 C-X-C motif chemokine 17 Human genes 0.000 claims description 3
- 101000889048 Homo sapiens C-X-C motif chemokine 17 Proteins 0.000 claims description 3
- 101100484930 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) VPS41 gene Proteins 0.000 claims description 3
- 230000003111 delayed effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 230000001629 suppression Effects 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 2
- 230000005611 electricity Effects 0.000 claims 1
- 230000005540 biological transmission Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
- G05B2219/25257—Microcontroller
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- 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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Abstract
The invention discloses a communication interface circuit with low power consumption control, which comprises MCB communication interfaces D2 and D3, wherein a No. 2 pin and a No. 5 pin GND of the MCB communication interfaces are connected with 12V output of input alternating current commercial power through 6-pole energy efficiency switch power supply isolation conversion and are used for providing power for a master control instrument upper computer, and the other path of isolation power supply of the switch power supply is connected with +18VP to provide power for a control circuit. And a serial port of the master control instrument is connected with the C _ TXD of the 3 rd pin and the C _ RXD of the 4 th pin of the MCB. In the invention, a group of switching power supplies are adopted to control the on-off of the input +18VP to realize low-power consumption standby requirements without additionally adding an ERP control small plate, the data transmission rate of a communication interface is improved, the OTA upgrade of a main control MCU firmware program of a lower computer control plate can be realized through the communication control interface of a control instrument under the condition of normally used data communication control, and a user can download an upgrade package through a network to realize the OTA firmware program upgrade of the whole system through Bluetooth or WiFi wireless connection of the main control instrument.
Description
Technical Field
The invention belongs to the technical field of communication interface circuits, and particularly relates to a communication interface circuit with low power consumption control.
Background
The fitness equipment mainly comprises a running machine, a fitness vehicle, an elliptical machine and the like, wherein the running machine, the fitness vehicle, the elliptical machine and the like are powered by alternating current mains supply generally, relevant authentication requirements on equipment standby power consumption are required, the standby power consumption requirement of the fitness equipment is required to be less than or equal to 0.5W, an independent ERP control board is added at the power input pre-stage of an equipment control system at present, when the equipment enters a standby mode, the main power supply of the whole control system is cut off by the ERP control board, and an ERP small board supplies power to a control instrument in a low power consumption mode to reduce the standby power consumption in the standby mode.
Disclosure of Invention
The invention aims to: the communication interface circuit with low power consumption control is provided for solving the problem that the circuit in the prior art is complex and has relatively high cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
a communication interface circuit with low power consumption control comprises MCB communication interfaces D2 and D3, and is characterized in that a 2 nd pin and a 5 th pin GND of the MCB communication interfaces are connected with 12V output of input alternating current mains supply through 6-pole energy efficiency switch power supply isolation conversion and used for providing power for a master control instrument upper computer, the other path of isolation power supply of the switch power supply is connected with +18VP to provide power for a control circuit, a serial port sending signal of the master control instrument is connected with C _ RXD of a 4 th pin of the MCB, C _ RXD of the 4 th pin of the MCB is reversed through a C7 filtering FET2, U3 and R14 are connected with a serial port D receiving end of a master control MCU of a lower computer, the master control MCU of the lower computer is connected with a 3 rd pin C _ TXD of an MCB port through R11, U3 and R10, the 3 rd pin TXC _ D of the MCB port is connected with a serial port receiving port of the master control upper computer, a 1 st pin of the MCB port is connected with an input port of an LDO U2, an IO port of the lower computer main control MCU is connected with an SW-ON signal output by a U1 optical coupler, a C2 is connected with a FET1, the FET1 is conducted, Q2 and Q1 are also kept conducted, and +15VP and +5VP supply power for the main control MCU and a driving circuit and the like.
As a further description of the above technical solution:
the alternating current mains supply voltage reduction isolation is VCC1+12V after passing through one secondary rectification filter of the switch transformer, and provides power for the electronic instrument.
As a further description of the above technical solution:
the function of the D1 is to prevent the SW-ON signal voltage from being too high when the U1 optical coupler is turned off, and the function of voltage clamping is realized.
As a further description of the above technical solution:
the D2 and D3 are ESD static suppression tubes which are mainly used for absorbing static which is possibly conducted by the master control upper computer to avoid damaging a communication interface of the MCB lower computer.
As a further description of the above technical solution:
when the SW-ON signal is in a high level state, the C2 is rapidly charged through the D4, when the SW-ON signal is in a low level state, the electric energy stored in the C2 continues to provide an ON voltage for the FET1, meanwhile, the D4 is reversely cut off, the C2 is slowly discharged through the R9, the FET1 is turned off in a delayed mode, the Q2 and the Q1 are cut off, and the power consumption of a lower computer is reduced to the minimum after the +15VP and the +5VP are cut off.
As a further description of the above technical solution:
the 12V SW enabling signal of the main control instrument is isolated by the optocoupler U1 to transmit an SW-ON control signal, and meanwhile, the voltage is reduced to 5V by the LDO power chip U2 to supply power to the isolation end of the high-speed digital isolation chip.
As a further description of the above technical solution:
the U3 adopts a high-speed digital isolation chip, the communication speed of the digital isolation chip is many times higher than that of a common optical coupler, and the communication speed of the upper computer and the lower computer can be improved to meet the requirement of a large amount of data flow of the lower computer in the OTA upgrading process so as to shorten the OTA upgrading time within an acceptable range.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. in the invention, a group of switching power supplies and auxiliary power supplies are adopted to control to realize low-power standby requirements without additionally adding an ERP control small plate, the data transmission rate of a communication interface is improved, OTA upgrading of a main control MCU firmware program of a lower computer control panel can be realized through the communication control interface of a control instrument under the condition of normally used data communication control, a user can download an upgrading packet through a network to realize OTA firmware program upgrading of the whole system through Bluetooth or WiFi wireless connection of the main control instrument, and the problem that after-sale upgrading software programs of products need to be provided for service at home to reduce after-sale cost is solved.
2. According to the invention, an onboard 6-pole energy efficiency switching power supply provides power support for the main control instrument and the controllable auxiliary power supply, and the high-speed digital signal isolation chip replaces the traditional optical coupler isolation, so that the serial port communication speed can be accelerated, the online OTA program upgrade of the controller main control MCU can be conveniently realized, the problem of after-sale program upgrade optimization of a product is solved, and after-sale personnel are not needed to visit to serve users, so that the after-sale cost of the product is reduced. In addition, the design mode can only need one group of switching power supplies to supply power to the master control instrument, an additional ERP control board is not needed, the circuit and the design cost are simplified, the circuit is simpler, and the reject ratio of products can be reduced.
Drawings
Fig. 1 is a schematic structural diagram of a communication interface circuit with low power consumption control according to the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a communication interface circuit with low power consumption control comprises an MCB communication interface D2 and a D3, wherein a No. 2 pin and a No. 5 pin GND of the MCB communication interface are connected with 12V output of input alternating current mains supply through 6-pole energy efficiency switching power supply isolation conversion and are used for providing power for a master control instrument upper computer, the other path of isolation power supply of the switching power supply is connected with +18VP to provide power for a control circuit, and alternating current mains supply voltage reduction isolation is VCC1+12V after passing through one path of secondary rectification filter of a switching transformer and provides power for an electronic instrument;
the serial port of the master control instrument is connected with the C _ RXD of the 4 th pin of the MCB, the serial port of the master control instrument is used for sending signals, the C _ RXD of the 4 th pin of the MCB is reversed through a C7 filter FET2, the U3 and the R14 are connected with the serial port RXD receiving end of the master control MCU of the lower computer, the master control MCU of the lower computer is connected with the 3 rd pin C _ TXD of the MCB port through R11, U3 and R10, the U3 adopts a high-speed digital isolation chip, the communication speed of the digital isolation chip is higher than that of a common optical coupler by a plurality of times, the communication speed of the upper computer and the communication speed of the lower computer can be improved to meet the mass data flow of the lower computer in the OTA upgrading process so as to shorten the upgrading time within an acceptable range, the C _ TXD of the 3 rd pin of the MCB port is connected with the serial port receiving port of the master control instrument, the master control MCU of the lower computer transmits the related operation of rotating speed, voltage, current and the order to the master control instrument after receiving end of the order, and the order execution, and realizes the communication control loop function, the 1 st pin of the MCB port is connected with the input port of the LDO U2, one IO port of the lower computer main control MCU is connected with the SW-ON signal output by the U1 optical coupler at low level, the C2 is connected with the FET1, the FET1 is conducted, the Q2 and the Q1 are also kept conducted, the +15VP and the +5VP supply power for the main control MCU and the drive circuit, the reliability and compatibility of circuit signals are increased for the input serial port signals of the isolated chip after the signals are processed by the FET1 level inverse filter circuit, the 12V SW enabling signal of the main control instrument is isolated by an optical coupler U1 to transmit an SW-ON control signal, meanwhile, the voltage is reduced to 5v by the LDO power chip U2 and then the power is supplied to the isolation end of the high-speed digital isolation chip, the high-speed isolation chip replaces optical coupling isolation to improve the serial port communication rate of the control system, realize that the firmware program of the main control MCU can be upgraded OTA except for serial port communication control, and reduce the after-sale upgrade service cost of the product;
the D1 has the function of preventing the SW-ON signal voltage from being too high when the U1 optical coupler is turned off to play a role of voltage clamping, and the D2 and the D3 are communication interfaces of an ESD static suppression tube which are mainly used for absorbing static possibly conducted by a main control upper computer to avoid damaging an MCB lower computer.
The working principle is as follows: when the main control instrument upper computer enters a sleep standby mode, a 12V S/W signal can be turned off to turn off the power supply of the LDO U2 through the 1 st pin of an MCB port, meanwhile, a control end light-emitting tube of a U1 optical coupler stops emitting light, an isolation receiving end is in a cut-off state, an SW-ON signal is a low level and is connected to one IO port of a main control MCU of a lower computer, the main control IO of the lower computer immediately enters a stop mode after receiving the low level signal, at the moment, the FET1 is continuously turned ON because the electric energy stored in the C2 with the unidirectional conduction characteristic of a D4 diode, as the FET1 is turned ON, the Q2 and the Q1 are also continuously turned ON, the +15VP and the +5VP continuously supply power to the main control MCU, the driving and other circuits, as the electric energy stored in the C2 is discharged through the R9, the voltage at the two ends of the C2 is reduced to the voltage which can not maintain the conduction of the FET1, the FET1 is turned off, and the Q2 and the Q1 can not reach the cut-off state after 1 is turned ON condition, when the SW-ON signal is in a high level state, the C2 is rapidly charged through the D4, when the SW-ON signal is in a low level state, the electric energy stored by the C2 continues to provide a conducting voltage for the FET1, meanwhile, the D4 is reversely cut off, the C2 is slowly discharged through the R9, the FET1 is delayed to be turned off, the Q2 and the Q1 are cut off, and the power consumption of a lower computer is reduced to the minimum after +15VP and +5VP are cut off. When the master control instrument upper computer needs to end the low power consumption mode and enters a normal working state, a control signal of 12V can be output by opening S/W, the LDO U2 supplies power for the high-speed isolation chip U3, the U1 optical coupler is conducted with Q2, the Q1 is conducted with +15VP and +5VP to supply power and output the lower computer to normally work, and the U1 optical coupler is conducted with the C2 rapid charging FET1 through a D4 diode.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (7)
1. A communication interface circuit with low power consumption control comprises MCB communication interfaces D2 and D3, and is characterized in that a 2 nd pin and a 5 th pin GND of the MCB communication interfaces are connected with 12V output of input alternating current mains supply through 6-pole energy efficiency switch power supply isolation conversion and used for providing power for a master control instrument upper computer, the other path of isolation power supply of the switch power supply is connected with +18VP to provide power for a control circuit, a serial port sending signal of the master control instrument is connected with C _ RXD of a 4 th pin of the MCB, C _ RXD of the 4 th pin of the MCB is reversed through a C7 filtering FET2, U3 and R14 are connected with a serial port D receiving end of a master control MCU of a lower computer, the master control MCU of the lower computer is connected with a 3 rd pin C _ TXD of an MCB port through R11, U3 and R10, the 3 rd pin TXC _ D of the MCB port is connected with a serial port receiving port of the master control upper computer, a 1 st pin of the MCB port is connected with an input port of an LDO U2, an IO port of the lower computer main control MCU is connected with an SW-ON signal output by a U1 optical coupler, a C2 is connected with a FET1, the FET1 is conducted, Q2 and Q1 are also kept conducted, and +15VP and +5VP supply power for the main control MCU and a driving circuit and the like.
2. The communication interface circuit with low power consumption control of claim 1, wherein the ac mains voltage reduction isolation is VCC1+12V after being rectified and filtered by one secondary of the switching transformer, and provides power for the electronic instrument.
3. The communication interface circuit with low power consumption control of claim 1, wherein the D1 is used for avoiding the SW-ON signal voltage from being too high to perform a voltage clamping function when the U1 optical coupler is turned off.
4. The communication interface circuit with low power consumption control of claim 1, wherein the D2 and D3 are ESD static suppression tubes mainly used for absorbing static electricity possibly conducted by the master upper computer to avoid damaging the communication interface of the MCB lower computer.
5. The communication interface circuit with low power consumption control of claim 1, wherein the SW-ON signal is in a high state, the C2 is charged quickly through D4, the power stored in C2 continues to provide the ON voltage for the FET1, the D4 turns off the C2 in the reverse direction and discharges slowly through R9, the FET1 is turned off in a delayed manner, the Q2 and the Q1 are turned off, and the power consumption of the lower computer is reduced to the minimum after the +15VP and the +5VP are turned off.
6. The communication interface circuit with low power consumption control of claim 1, wherein a 12V SW enable signal of the main control instrument is isolated by an optocoupler U1 to transmit an SW-ON control signal, and is stepped down to 5V by an LDO power chip U2 to supply power to an isolated end of the high-speed digital isolation chip.
7. The communication interface circuit with low power consumption control according to claim 1,
the U3 adopts high-speed digital isolation chip, and digital isolation chip is many times than ordinary opto-coupler communication speed, can improve the communication speed of host computer and lower computer and satisfy the massive data stream of lower computer in the OTA upgrading process to shorten OTA upgrading time and be in acceptable range.
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