CN105140875A - Vehicle power supply output photoelectric coupled isolation circuit - Google Patents
Vehicle power supply output photoelectric coupled isolation circuit Download PDFInfo
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- CN105140875A CN105140875A CN201510531034.8A CN201510531034A CN105140875A CN 105140875 A CN105140875 A CN 105140875A CN 201510531034 A CN201510531034 A CN 201510531034A CN 105140875 A CN105140875 A CN 105140875A
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Abstract
The invention discloses a vehicle power supply output photoelectric coupled isolation circuit, which comprises an input port, an output port, a detection control circuit, a presentation controller circuit and a photoelectric coupled isolation circuit, wherein the photoelectric coupled isolation circuit is connected between the input port and the detection control circuit; an output end of the detection control circuit is connected with the presentation controller circuit and the output port respectively; the detection control circuit comprises a rectifying circuit, a detection circuit, a control circuit and a processing circuit; a filter circuit comprises three filter capacitors which are connected with one another in parallel and are unequal in capacitance value; at least one order of magnitude is formed between every two filter capacitors. The vehicle power supply output photoelectric coupled isolation circuit plays a role in directly connecting an isolated power grid and vehicle power supply; when the power grid or equipment is in a fault, the connection between the power grid and the equipment is effectively cut off; the equipment is protected; and meanwhile, the safety of workers is ensured.
Description
Technical field
The present invention relates to a kind of vehicle power and export optical coupling isolation circuit, be applicable to various home appliance and industrial drives overhaul of the equipments occasion.
Background technology
The maintenance that powers on of legacy equipment product is all directly be connected on electrical network alternating current 220V or exchange on 380V.If short circuit or other fault appear in equipment, input current sharply increases, and gently then causes input current end proterctive equipment to trip, heavy then cause equipment explosion, jeopardizes the safety of maintainer.
Application number is 201310280745.3, and the applying date is that the patent of invention of 2013.07.05 discloses a kind of power output device, comprises input port, output port, detection control circuit, presentation controller circuit; Described input port is connected with the input of described detection control circuit, and the output of described detection control circuit is connected with presentation controller circuit, output port respectively.Power output device of the present invention is mainly used between the input of device power supply (DPS) and electrical network; play the effect that isolation electrical network is directly connected with equipment; when electrical network or equipment break down time; connection between effective cut-out electrical network and equipment; while protecting equipment, ensure that the safety of staff.
Although above-mentioned patent can effectively solve certain safety problem, the impact of big current or pulse still can not effectively be cut off or be isolated.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of vehicle power to export optical coupling isolation circuit, solves In-vehicle Power Source Device and to power on the problem can not effectively isolated in maintenance process.
The present invention, for solving the problems of the technologies described above, adopts following technical scheme:
A kind of vehicle power exports optical coupling isolation circuit, comprises input port, output port, detection control circuit, presentation controller circuit, optical coupling isolation circuit, optical coupling isolation circuit is connected between described input port and detection control circuit, the output of described detection control circuit is connected with presentation controller circuit, output port respectively, and described detection control circuit comprises rectification circuit, testing circuit, control circuit, treatment circuit, described optical coupling isolation circuit comprises photoelectrical coupler, filter circuit, pull-up resistor, current-limiting resistance, described photoelectrical coupler comprises first input end, second input, first output, second output, wherein, first input end is connected with external dc power by current-limiting resistance, second input is connected with input port, first output is divided into two-way, pull-up resistor of leading up to is connected with outside second DC power supply, another road is connected with output port, second output head grounding, second DC power supply is connected filter circuit with between ground, described filter circuit comprises three the unequal filter capacitors of capacitance be connected in parallel, and between each filter capacitor, at least differ an order of magnitude.
Described detection control circuit comprises rectification circuit, testing circuit, control circuit, treatment circuit.
Described testing circuit comprises over-current detection circuit, over-voltage detection circuit, overheating detection circuit, short-circuit detecting.
Described detection control circuit comprises auto-breaking equipment.
Described presentation controller circuit comprises display device, control panel; Wherein, display device receives the instruction of described treatment circuit, and display job information, described control panel arranges detection threshold, is sent to treatment circuit.
Described display device is LED display.
Compared with prior art, the present invention has following beneficial effect:
1, the present invention is mainly used between the input of vehicle power and electrical network; play the effect that isolation electrical network is directly connected with vehicle power, when electrical network or equipment break down time, effectively cut off the connection between electrical network and equipment; while protecting equipment, ensure that the safety of staff.
2, apply optical coupling isolation circuit to isolate, equipment is short-circuited in the process worked or overhaul and all can effectively isolates, improve security performance.
3, adopt three grades of capacitance isolation, effectively can carry out filtering to the interference of different frequency range, ensure that the stability that light-coupled isolation outputs signal.
Accompanying drawing explanation
Fig. 1 is system block diagram of the present invention.
Fig. 2 is optical coupling isolation circuit schematic diagram of the present invention.
Embodiment
Below technical scheme of the present invention is described in detail:
Those skilled in the art of the present technique are understandable that, unless otherwise defined, all terms used herein (comprising technical term and scientific terminology) have the meaning identical with the general understanding of the those of ordinary skill in field belonging to the present invention.Should also be understood that those terms defined in such as general dictionary should be understood to have the meaning consistent with the meaning in the context of prior art, unless and define as here, can not explain by idealized or too formal implication.
As shown in Figure 1 and Figure 2, a kind of vehicle power exports optical coupling isolation circuit, comprises input port, output port, detection control circuit, presentation controller circuit, optical coupling isolation circuit, optical coupling isolation circuit is connected between described input port and detection control circuit, the output of described detection control circuit is connected with presentation controller circuit, output port respectively, and described detection control circuit comprises rectification circuit, testing circuit, control circuit, treatment circuit, described optical coupling isolation circuit comprises photoelectrical coupler, filter circuit, pull-up resistor, current-limiting resistance, described photoelectrical coupler comprises first input end, second input, first output, second output, wherein, first input end is connected with external dc power by current-limiting resistance, second input is connected with input port, first output is divided into two-way, pull-up resistor of leading up to is connected with outside second DC power supply, another road is connected with output port, second output head grounding, second DC power supply is connected filter circuit with between ground, described filter circuit comprises three the unequal filter capacitors of capacitance be connected in parallel, and between each filter capacitor, at least differ an order of magnitude.
Described detection control circuit comprises rectification circuit, testing circuit, control circuit, treatment circuit.
Described testing circuit comprises over-current detection circuit, over-voltage detection circuit, overheating detection circuit, short-circuit detecting.
Described detection control circuit comprises auto-breaking equipment.
Described presentation controller circuit comprises display device, control panel; Wherein, display device receives the instruction of described treatment circuit, and display job information, described control panel arranges detection threshold, is sent to treatment circuit.
Described display device is LED display.
Function and the operation principle of each module of this circuit are as follows:
Rectification circuit: become direct voltage output to testing circuit the ac voltage rectifier of input.
Testing circuit: testing circuit according to the signal received, and is sent to treatment circuit by after this signal transacting in real time, and testing circuit is at least one in over-current detection circuit, over-voltage detection circuit, overheating detection circuit, short-circuit detecting.
Control circuit: the electrical connection controlled between electrical network and Devices to test is switched on or switched off.
Treatment circuit: the information sent according to testing circuit and the threshold value preset compare, judge that whether current operating state is normal, if current operating state is abnormal, send the control end of control command to control circuit, control to disconnect electrical network and be connected with the power supply between Devices to test.Treatment circuit sends work state information in real time and shows to display device.
Display device: display current operating state information in real time.
Control panel: arrange detection threshold voltage, be sent to processing module, can arrange different threshold values, makes this equipment can be operated in different states, compatible good.
This equipment is such equipment in the power input series connection of equipment, line voltage is input in detected equipment by this equipment again, and this equipment plays the effect of a limiting input current, when a failure occurs, timely cut-out is detected the power supply of equipment, avoids dangerous generation.
The treatment circuit of the present embodiment can adopt the AT89S52 of 51 single-chip microcomputer series, and AT89S52 possesses following features:
AT89S52 is a kind of low-power consumption, high-performance CMOS 8 8-digit microcontroller, has 8K in-system programmable components flash storage.Use the manufacture of Atmel company high-density nonvolatile memory technology, with the instruction of industrial 80C51 product and pin completely compatible.On sheet, Flash allows program storage in-system programmable components, is also suitable for conventional programming device.On a single chip, have 8 dexterous bit CPUs and in-system programmable components Flash, height is flexible, the solution of super efficient for numerous embedded Control application system provides to make AT89S52.AT89S52 has following standard feature: 8k bytes Flash, 256 byte RAM, 32 I/O mouth lines, WatchDog Timer, 2 data pointers, three 16 bit timing device/counters, one 6 vector, 2 grades of interrupt structures, full duplex serial port, crystal oscillator and clock circuit in sheet.In addition, AT89S52 can be down to the operation of 0Hz static logic, supports that 2 kinds of software-selectable select energy-saving mode.Under idle pulley, CPU quits work, and permission RAM, timer/counter, serial ports, interruption work on.Under power down protection mode, RAM content is saved, and oscillator is frozen, and all work of single-chip microcomputer stop, and interrupt or hardware reset until next.
MCS-51 device has independent program storage and data storage.External program memory and data storage can 64K addressing.
Program storage: if EA pin ground connection, program reads only from external memory storage.
For 89S52, if EA meets VCC, program read-write is first from internal storage (address is 0000H ~ 1FFFH), and then from outside addressing, addressable address is: 2000H ~ FFFFH.
Data storage: AT89S52 has data storage in 256 chunks.High 128 bytes are overlapping with special function register.That is high 128 bytes have identical address with special function register, and physically separate.
When the address of an instruction access higher than 7FH, addressing system determines that CPU accesses high 128 byte RAM or special function register space.Direct addressing method access special function register (SFR).
Such as, below direct addressing instruction access 0A0H (P2 mouth) memory cell MOV0A0H, #data use indirect addressing mode access high 128 byte RAM.Such as, in indirect addressing mode below, R0 content is 0A0H, access be the register of address 0A0H, instead of P2 mouth (its address is also 0A0H).
MOVR0, #data stack manipulation is also indirect addressing mode.Therefore, high 128 byte data RAM also can be used for stack space.
The above is only some embodiments of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. vehicle power exports an optical coupling isolation circuit, comprises input port, output port, detection control circuit, presentation controller circuit, optical coupling isolation circuit, optical coupling isolation circuit is connected between described input port and detection control circuit, the output of described detection control circuit is connected with presentation controller circuit, output port respectively, and described detection control circuit comprises rectification circuit, testing circuit, control circuit, treatment circuit, it is characterized in that: described optical coupling isolation circuit comprises photoelectrical coupler, filter circuit, pull-up resistor, current-limiting resistance, described photoelectrical coupler comprises first input end, second input, first output, second output, wherein, first input end is connected with external dc power by current-limiting resistance, second input is connected with input port, first output is divided into two-way, pull-up resistor of leading up to is connected with outside second DC power supply, another road is connected with output port, second output head grounding, second DC power supply is connected filter circuit with between ground, described filter circuit comprises three the unequal filter capacitors of capacitance be connected in parallel, and between each filter capacitor, at least differ an order of magnitude.
2. vehicle power according to claim 1 exports optical coupling isolation circuit, it is characterized in that: described detection control circuit comprises rectification circuit, testing circuit, control circuit, treatment circuit.
3. vehicle power according to claim 2 exports optical coupling isolation circuit, it is characterized in that: described testing circuit comprises over-current detection circuit, over-voltage detection circuit, overheating detection circuit, short-circuit detecting.
4. vehicle power according to claim 1 exports optical coupling isolation circuit, it is characterized in that: described detection control circuit comprises auto-breaking equipment.
5. vehicle power according to claim 1 exports optical coupling isolation circuit, it is characterized in that: described presentation controller circuit comprises display device, control panel; Wherein, display device receives the instruction of described treatment circuit, and display job information, described control panel arranges detection threshold, is sent to treatment circuit.
6. vehicle power according to claim 5 exports optical coupling isolation circuit, it is characterized in that: described display device is LED display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510531034.8A CN105140875A (en) | 2015-08-27 | 2015-08-27 | Vehicle power supply output photoelectric coupled isolation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510531034.8A CN105140875A (en) | 2015-08-27 | 2015-08-27 | Vehicle power supply output photoelectric coupled isolation circuit |
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| Publication Number | Publication Date |
|---|---|
| CN105140875A true CN105140875A (en) | 2015-12-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201510531034.8A Pending CN105140875A (en) | 2015-08-27 | 2015-08-27 | Vehicle power supply output photoelectric coupled isolation circuit |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130135909A1 (en) * | 2011-11-29 | 2013-05-30 | Hon Hai Precision Industry Co., Ltd. | Output adjustment circuit for power supply unit |
| CN103346524A (en) * | 2013-07-05 | 2013-10-09 | 无锡商业职业技术学院 | Power output device |
| CN203734532U (en) * | 2013-12-25 | 2014-07-23 | 四川新力光源股份有限公司 | Chopper circuit used for LED driver |
-
2015
- 2015-08-27 CN CN201510531034.8A patent/CN105140875A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130135909A1 (en) * | 2011-11-29 | 2013-05-30 | Hon Hai Precision Industry Co., Ltd. | Output adjustment circuit for power supply unit |
| CN103346524A (en) * | 2013-07-05 | 2013-10-09 | 无锡商业职业技术学院 | Power output device |
| CN203734532U (en) * | 2013-12-25 | 2014-07-23 | 四川新力光源股份有限公司 | Chopper circuit used for LED driver |
Non-Patent Citations (1)
| Title |
|---|
| 刘青川 等: "基于DSP的无速度传感器直接转矩控制系统设计", 《电子质量》 * |
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Application publication date: 20151209 |
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| RJ01 | Rejection of invention patent application after publication |