CN104569850A - Switch power supply detection system circuit - Google Patents
Switch power supply detection system circuit Download PDFInfo
- Publication number
- CN104569850A CN104569850A CN201310501637.4A CN201310501637A CN104569850A CN 104569850 A CN104569850 A CN 104569850A CN 201310501637 A CN201310501637 A CN 201310501637A CN 104569850 A CN104569850 A CN 104569850A
- Authority
- CN
- China
- Prior art keywords
- circuit
- voltage
- detection system
- signal
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Protection Of Static Devices (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The invention discloses a switch power supply detection system circuit which is characterized by comprising a power supply conversion circuit, a voltage detection circuit, a current detection circuit, an over-heat detection circuit, a communication circuit, an address selection circuit, a control circuit, a relay control circuit and a launch and control unit, wherein the power supply conversion circuit is used for converting voltage of a detected power supply into expected voltage. By adopting the switch power supply detection system circuit, the problems that in the prior art, a voltage signal to be detected can be interfered and a detection system can be interfered by a communication digital signal in the process that a switch power supply is detected, and moreover the detection system can be damaged once the voltage of the detected power supply is too high are solved, by virtue of voltage isolation and communication isolation, the anti-interference property of a system is improved, and the security of the detection system is improved through steps of pressure separation, isolation and amplification of a voltage signal to be detected and current signal value reduction.
Description
Technical field
The present invention relates to automatic detection field, be mainly used in the automatic detection realizing switch power supply system.
Background technology
Along with various electric appliance and electronic product popularizing in work and life, the application scenario of Switching Power Supply is very extensive, at present in the process that Switching Power Supply is detected, the interference to voltage signal to be measured can be produced, and communication digital signal produces interference to detection system, if and once detected supply voltage is too high, the infringement to detection system can be caused.
Therefore, industry needs a kind of security high, and can not cause the Switching Power Supply detection system of interference to voltage signal to be measured and detection system self.
Summary of the invention
Switch power supply system requires that the voltage-regulation coefficient exported to be less than etc. 0.5%; overcurrent protection value is 110% ~ 130% of load current value; detection system of the present invention detects the voltage of power-supply system, electric current, superheat value; status information is sent to control unit; when system voltage stabilizes degree is more than or equal to 0.5%; when electric current exceedes load current value 110% ~ 130%, when overheating fault appears in system, sending out control unit need process the failure message detected.
For reaching above-mentioned purpose, the present invention aims to provide a kind of Switching Power Supply detection system circuit, comprise and detected supply voltage is carried out converting the power-switching circuit being converted to required voltage, voltage detecting circuit, current detection circuit, overheating detection circuit, communicating circuit, addressing circuit, control circuit, control relay circuit and a control unit; Required voltage signal is sent into described control circuit after the isolation of input voltage dividing potential drop being amplified and is gathered by described voltage detecting circuit; After described current detection circuit detects electric current, signal is sent into described control circuit; Described overheating detection circuit is by overheated on-off model input control circuit; By described communicating circuit, realize the transmission sending out signal between control unit and control circuit; Described coded message, by encoding to the selection of module, is flowed to described control circuit by described addressing circuit; Described control circuit sends status information to sending out control unit, and accepts the information sending out control unit; Described control relay circuit, can the load module of deenergization detection system according to the judgement of described control system to outside status information.
Power-switching circuit mainly realizes the conversion of voltage, the voltage of outside input is converted to required voltage through conversion, in the present invention, 30V voltage first can be converted to 12V voltage, then be converted to the voltage of 3 road 5V.In voltage detecting circuit, need isolate the voltage of input, the therefore input of isolation module, output voltage adopt two independently power supplys, guarantee the effect reaching isolation.The input of voltage isolation module and the light of overheating detection circuit are every input employing one road 5V power supply; The conditioning unit of the voltage process after isolation and current detection circuit, control system, overheating detection circuit another road public 5V power supply; For realizing communication isolation, prevent the interference of outer signals, communicating circuit digital circuits section adopts the 3rd road 5V power supply.
Voltage detecting circuit mainly comprises voltage isolation amplifying unit and voltage amplification unit, voltage to be detected is 30V, by obtaining the voltage of primary voltage 1/300 times after dividing potential drop, this voltage amplifies through signal condition after the voltage amplification of the isolation of HCPL-7800A and 8 times again to be sent required voltage signal into control system after twice and gathers.
Current signal is converted to about 5V voltage signal at prime unit by current detection circuit, this signal is reduced one times herein, in order to avoid accidental surge voltage damage control system.
Overheating detection circuit by overheated on-off model through optocoupler input control system.
Communicating circuit is made up of every two parts MAX489 and light, MAX489 is converted to the differential signal of two-way input/output signal, high-speed light sends into launching control system after signal isolation control system exported, or the input signal of launching control system is sent into control system after isolation.
Address selection unit realizes the selection to 17 modules mainly through five address wires.Encode to 17 modules, control system judges the coding obtained, then issues launching control system by after its decoding, and launching control system judges the decoding obtained, and determines the module specifically broken down.
Control system adopts PIC16F88 single-chip microcomputer, the inner integrated AD of PIC16F88, can gather the voltage signal after isolated variable and current signal, the I/O port link address line signal of PIC16F88, adopt the overheating fault information of interrupt mode to outside to process simultaneously.PIC16F88 single-chip microcomputer sends status information to sending out control unit simultaneously, and accepts the information sending out control unit.
Control relay circuit mainly judges the external status information that receives in control system, controls the Systematical control actuating of relay, the load module of deenergization detection system, protection detection system when finding overvoltage, overcurrent, the state such as overheated.
Instant invention overcomes in the process in prior art, Switching Power Supply detected, the interference to voltage signal to be measured can be produced, and communication digital signal is to the interference of detection system, if and once detected supply voltage is too high, the problem to detection system infringement can be caused, by adopting voltage isolation and communication isolating, improve the anti-interference function of system, and improve the security of detection system by the step reduced voltage signal dividing potential drop to be measured, isolation, amplification and current signal value.
By reference to the accompanying drawings, according to hereafter illustrate that the description of purport of the present invention can know other aspects of the present invention and advantage by example.
Accompanying drawing explanation
By reading the detailed description done non-limiting example done with reference to the following drawings, other features, objects and advantages of the present invention will become more obvious:
Fig. 1-1, Fig. 1-2 and Fig. 1-3 are power-switching circuit schematic diagrams;
Fig. 2 is voltage detecting circuit schematic diagram;
Fig. 3 is current detection circuit schematic diagram;
Fig. 4 is overheating detection circuit schematic diagram;
Fig. 5-1 and Fig. 5-2 is communicating circuit schematic diagrams;
Fig. 6 is addressing circuit schematic diagram;
Fig. 7 is control system circuit theory diagrams;
Fig. 8 is control relay circuit schematic diagram;
In accompanying drawing, same or analogous Reference numeral represents same or analogous parts.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail.Should be understood that following examples only for illustration of the present invention but not for limiting scope of the present invention.
Now describe a kind of Switching Power Supply detection system circuit according to the embodiment of the present invention in detail.
Fig. 1-1, Fig. 1-2 and Fig. 1-3 are power-switching circuit schematic diagrams, and the voltage transitions inputted outside mainly through FKC05-24S12W is 12V voltage, are then the 5V voltage on 3 tunnels by 12V voltage transitions by B1205 and 7805.Independently 3 road 5V voltages are convenient to the isolation of circuit.
Fig. 2 is voltage detecting circuit schematic diagram, the voltage signal magnitude of input is between 32V ~ 34V, some spikes need be there are, voltage signal before collection need be isolated by HCPL-7800A, the input voltage range of HCPL-7800A is between-200mV ~ 200mV, dividing potential drop is carried out by the divider resistance of R29 and R35, intrinsic standoff ratio is 300:1, get the voltage input HCPL-7800A at R35 two ends, the voltage of input meets-200mV ~ 200mV, HCPL-7800A can isolate voltage and amplify simultaneously, voltage magnitude after amplifying 8 times is less, it is amplified again, LM358D is difference amplifier, enlargement factor is R25/R28, get 2 times of enlargement factors, the voltage signal obtained is sent into control system.
In electric current is detected, current signal is converted to voltage signal by former-section circuit, the voltage signal that obtains first through anti-phase, consisted of the reverse amplification of a times, obtains the voltage signal that voltage is about 5V by the present invention the resistance of LM358D and R26 and front end circuit.For Protection control system, send into control system after one times of process is reduced to voltage, adopt LM358D, R27, R32, R34, R37 to form forward amplifier,
Fig. 4 is overheating detection circuit schematic diagram, and heat alarm is also on-off model, heat alarm by light every rear access control system.
Fig. 5-1 and Fig. 5-2 is communicating circuit schematic diagrams.Communicating circuit takes isolation method, reduces external interference.Communicating circuit is made up of MAX489 and ACSL-6210, and communicating circuit is half-duplex mode of operation, and by the read-write of control system EN signal communication control, ACSL-6210 plays buffer action.
Fig. 6 is addressing circuit schematic diagram, and address location is also on-off model, access control system after pull-up resistor.
Fig. 7 is control system schematic diagram, control system carries AD mainly through inside and detects voltage, current variable, by interrupting being detected thermal signal, signal is sent to the IO mouth of control system by address selection unit, and the magnitude of voltage detected, current value, superheat state information are passed to launching control system by 485 communication buses by control system.Launching control system sends information to control system.When occurring that voltage, electric current, superheat state do not meet the demands, control system can by the break-make of pilot relay signal control circuit.
Fig. 8 is control relay circuit schematic diagram.When control system detects the voltage, current signal and the superheat state information that do not meet the demands, pilot relay disconnects.Prevent front-end circuit to the infringement of detection system.
Tool of the present invention has the following advantages:
(1) there is voltage isolation features; Take voltage to isolate to voltage signal to be measured, prevent the interference to voltage signal to be measured.
(2) there is communication isolating function; Adopt Phototube Coupling, prevent the interference to communication digital signal, improve the antijamming capability of system.
(3) can bear larger voltage signal and current signal input range, security of system is high.Voltage signal is isolated by system after dividing potential drop, amplify again, the voltage signal that current signal is changed by system is reduced by signal value after difference operational amplifier, magnitude of voltage under normal running conditions is through these dividing potential drops, isolation, amplification, and the I/O port of current signal value far below single-chip microcomputer after reducing bears voltage.
Claims (10)
1. a Switching Power Supply detection system circuit, it is characterized in that comprising and detected supply voltage is carried out converting the power-switching circuit being converted to required voltage, voltage detecting circuit, current detection circuit, overheating detection circuit, communicating circuit, addressing circuit, control circuit, control relay circuit and a control unit; Required voltage signal is sent into described control circuit after the isolation of input voltage dividing potential drop being amplified and is gathered by described voltage detecting circuit; After described current detection circuit detects electric current, signal is sent into described control circuit; Described overheating detection circuit is by overheated on-off model input control circuit; By described communicating circuit, realize the transmission sending out signal between control unit and control circuit; Described coded message, by encoding to the selection of module, is flowed to described control circuit by described addressing circuit; Described control circuit sends status information to sending out control unit, and accepts the information sending out control unit; Described control relay circuit, can the load module of deenergization detection system according to the judgement of described control system to outside status information.
2. detection system circuit according to claim 1, is characterized in that described power-switching circuit comprises FKC05-24S12W, B1205S-1W, 7805 power supply chips, filter capacitor and resistance; The voltage that outside inputs is changed by described FKC05-24S12W, is then independently plurality of voltages by the change in voltage after conversion by B1205S-1W and 7805 power supply chips.
3. detection system circuit according to claim 1, it is characterized in that described voltage detecting circuit mainly comprised buffer action HCPL-7800A and difference put LM358D, electric capacity and resistance; Described HCPL-7800A isolates the voltage signal before collection, and get the voltage input HCPL-7800A at R35 two ends, its input voltage range, between-200mV ~ 200mV, carries out dividing potential drop by the divider resistance of R29 and R35; Described HCPL-7800A can isolate voltage and amplify simultaneously; Described LM358D can to voltage signal difference amplifier, and enlargement factor is R25/R28.
4. detection system circuit according to claim 3, is characterized in that the intrinsic standoff ratio that described voltage detecting circuit carries out dividing potential drop by the divider resistance of R29 and R35 is 300:1; Described HCPL-7800A gets 8 times to the multiple of voltage amplification simultaneously; 2 times are got by the enlargement factor of LM358D to voltage signal.
5. detection system circuit according to claim 1, is characterized in that described current detection circuit comprises LM358, electric capacity and resistance; The voltage signal that obtains after front-end circuit conversion first through anti-phase, consisted of the reverse amplification of a times, obtains the voltage signal after reducing by described current detection circuit the resistance of described LM358 and R26 and front end circuit.
6. detection system circuit according to claim 1, is characterized in that described overheating detection circuit comprises TLP521-1 and resistance.
7. detection system circuit according to claim 1, it is characterized in that described communicating circuit comprise MAX489, light every and resistance; Described MAX489 is converted to the differential signal of two-way input/output signal; Light sends into described control unit after signal isolation control system exported, or the input signal of described control unit is sent into control circuit after isolation.
8. detection system circuit according to claim 1, it is characterized in that described addressing circuit comprises resistance, the selection to multiple module is realized by address wire, and these modules are encoded, described control circuit judges the coding obtained, control unit by issuing described sending out after its decoding again, described control unit judges the decoding obtained, and determines the module specifically broken down.
9. detection system circuit according to claim 1, it is characterized in that described control circuit comprises resistance and comprises PIC16F88 single-chip microcomputer and peripheral resistance, the inner integrated AD that can gather the voltage signal after isolated variable and current signal of described PIC16F88, the I/O port link address line signal of described PIC16F88, adopts the overheating fault information of interrupt mode to outside to process simultaneously; Described PIC16F88 single-chip microcomputer sends status information to sending out control unit simultaneously, and accepts the information sending out control unit.
10. detection system circuit according to claim 1, is characterized in that described control relay circuit comprises N-MOSFET pipe, resistance and electric capacity; When described control circuit detects the voltage, current signal and the superheat state information that do not meet the demands, described control circuit is by controlling described relay, the load module of deenergization detection system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310501637.4A CN104569850A (en) | 2013-10-23 | 2013-10-23 | Switch power supply detection system circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310501637.4A CN104569850A (en) | 2013-10-23 | 2013-10-23 | Switch power supply detection system circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104569850A true CN104569850A (en) | 2015-04-29 |
Family
ID=53086373
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310501637.4A Pending CN104569850A (en) | 2013-10-23 | 2013-10-23 | Switch power supply detection system circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104569850A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108061835A (en) * | 2017-12-25 | 2018-05-22 | 重庆多邦科技股份有限公司 | A kind of solar energy photovoltaic panel voltage sampling method, system and circuit |
| CN108235526A (en) * | 2018-04-03 | 2018-06-29 | 深圳茂硕电子科技有限公司 | A kind of control circuit |
| CN108732512A (en) * | 2018-06-13 | 2018-11-02 | 任志广 | A kind of data collection module applied to high voltage power supply |
| CN109738831A (en) * | 2018-12-04 | 2019-05-10 | 广州市扬新技术研究有限责任公司 | A kind of electrical two self-locking station pressure-adjusting type Switching Power Supply wiring board detection circuits of band |
| CN110687472A (en) * | 2019-11-08 | 2020-01-14 | 腾讯科技（深圳）有限公司 | Power supply monitoring device, electronic equipment, power supply monitoring method and storage medium |
| CN110927611A (en) * | 2019-12-09 | 2020-03-27 | 佛山市锐诚云智能照明科技有限公司 | Automatic fault reporting power supply, system and fault detection method |
| CN112986665A (en) * | 2021-03-30 | 2021-06-18 | 中国南方电网有限责任公司超高压输电公司梧州局 | Secondary ground grid voltage monitoring device and method |
| CN113030773A (en) * | 2019-07-30 | 2021-06-25 | 深圳市泛海三江电子股份有限公司 | Automatic test method for testing stability of output voltage of fire power supply |
| CN113252970A (en) * | 2021-04-23 | 2021-08-13 | 长城电源技术有限公司 | Load detection circuit and power supply system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2659001Y (en) * | 2003-10-31 | 2004-11-24 | 上海新华电子设备有限公司 | Switch power-supply monitoring board based on CAN bus |
| US20070164717A1 (en) * | 2004-05-07 | 2007-07-19 | Sanken Electric Co., Ltd. | Power factor improving circuit and switching power supply |
| CN103023331A (en) * | 2011-09-28 | 2013-04-03 | 中国科学院微电子研究所 | Isolated voltage and current detection control circuit of high-voltage switch power supply |
| CN103066843A (en) * | 2012-12-14 | 2013-04-24 | 大连海事大学 | Detection circuit and obtaining method of power source and voltage of switch |
| CN202978234U (en) * | 2012-12-06 | 2013-06-05 | 哈尔滨九洲电气股份有限公司 | Fault-detection protection apparatus for DC high-frequency switch power supply |
-
2013
- 2013-10-23 CN CN201310501637.4A patent/CN104569850A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2659001Y (en) * | 2003-10-31 | 2004-11-24 | 上海新华电子设备有限公司 | Switch power-supply monitoring board based on CAN bus |
| US20070164717A1 (en) * | 2004-05-07 | 2007-07-19 | Sanken Electric Co., Ltd. | Power factor improving circuit and switching power supply |
| CN103023331A (en) * | 2011-09-28 | 2013-04-03 | 中国科学院微电子研究所 | Isolated voltage and current detection control circuit of high-voltage switch power supply |
| CN202978234U (en) * | 2012-12-06 | 2013-06-05 | 哈尔滨九洲电气股份有限公司 | Fault-detection protection apparatus for DC high-frequency switch power supply |
| CN103066843A (en) * | 2012-12-14 | 2013-04-24 | 大连海事大学 | Detection circuit and obtaining method of power source and voltage of switch |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108061835A (en) * | 2017-12-25 | 2018-05-22 | 重庆多邦科技股份有限公司 | A kind of solar energy photovoltaic panel voltage sampling method, system and circuit |
| CN108235526A (en) * | 2018-04-03 | 2018-06-29 | 深圳茂硕电子科技有限公司 | A kind of control circuit |
| CN108235526B (en) * | 2018-04-03 | 2024-02-23 | 深圳茂硕电子科技有限公司 | Control circuit |
| CN108732512B (en) * | 2018-06-13 | 2020-11-24 | 任志广 | Data collection module applied to high-voltage power supply |
| CN108732512A (en) * | 2018-06-13 | 2018-11-02 | 任志广 | A kind of data collection module applied to high voltage power supply |
| CN109738831A (en) * | 2018-12-04 | 2019-05-10 | 广州市扬新技术研究有限责任公司 | A kind of electrical two self-locking station pressure-adjusting type Switching Power Supply wiring board detection circuits of band |
| CN113030773A (en) * | 2019-07-30 | 2021-06-25 | 深圳市泛海三江电子股份有限公司 | Automatic test method for testing stability of output voltage of fire power supply |
| CN110687472B (en) * | 2019-11-08 | 2022-03-11 | 腾讯科技（深圳）有限公司 | Power supply monitoring device, electronic equipment, power supply monitoring method and storage medium |
| CN110687472A (en) * | 2019-11-08 | 2020-01-14 | 腾讯科技（深圳）有限公司 | Power supply monitoring device, electronic equipment, power supply monitoring method and storage medium |
| CN110927611A (en) * | 2019-12-09 | 2020-03-27 | 佛山市锐诚云智能照明科技有限公司 | Automatic fault reporting power supply, system and fault detection method |
| CN112986665A (en) * | 2021-03-30 | 2021-06-18 | 中国南方电网有限责任公司超高压输电公司梧州局 | Secondary ground grid voltage monitoring device and method |
| CN112986665B (en) * | 2021-03-30 | 2024-06-04 | 中国南方电网有限责任公司超高压输电公司梧州局 | Secondary grounding grid voltage monitoring device and method |
| CN113252970A (en) * | 2021-04-23 | 2021-08-13 | 长城电源技术有限公司 | Load detection circuit and power supply system |
| CN113252970B (en) * | 2021-04-23 | 2022-11-18 | 长城电源技术有限公司 | Load detection circuit and power supply system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104569850A (en) | Switch power supply detection system circuit | |
| CN101995876B (en) | M-BUS controller | |
| CN102916689A (en) | Digital value acquisition circuit with fault diagnosis capacity | |
| CN102457196B (en) | Power unit control plate of high-voltage frequency converter | |
| CN104976731A (en) | Air conditioner controller and safety control circuit thereof | |
| CN103368524A (en) | Signal conditioning circuit for remote monitoring system of distribution transformer | |
| CN201886347U (en) | M-BUS controller | |
| CN101559785A (en) | Motor drive system based on drive module IPM | |
| CN104820457B (en) | Voltage adaptive Multipath digital quantity input card | |
| CN204138119U (en) | The safety protective circuit of a kind of escalator or moving sidewalk | |
| CN104077260A (en) | Concentrator M-BUS host communication interface device | |
| CN206023185U (en) | A kind of electric motor protecting control circuit | |
| CN102130671A (en) | Special chip for DiSEqC switch | |
| CN103475196B (en) | A kind of insulated gate bipolar transistor driver | |
| CN203596821U (en) | Electric power multimedia bridge | |
| CN107272813B (en) | A kind of switching signal input circuit | |
| CN100403623C (en) | Power supply module for communication equipment | |
| CN204856079U (en) | Switching value isolated safety barrier | |
| CN203054518U (en) | RS485 serial port detecting and repairing device | |
| CN103728903A (en) | User terminal | |
| CN211892841U (en) | Double-signal output induction circuit of accelerator pedal sensor | |
| CN202384263U (en) | Mechanical and electronic combined relay | |
| CN103501263A (en) | CAN (controller area network) communication protection circuit | |
| CN203398748U (en) | Multiple fault detection and protection device of bus | |
| CN202797904U (en) | Capacitor series voltage-sharing detection protecting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150429 |
|
| RJ01 | Rejection of invention patent application after publication |