CN105182856A - High voltage alternating signal acquisition system - Google Patents
High voltage alternating signal acquisition system Download PDFInfo
- Publication number
- CN105182856A CN105182856A CN201510615763.1A CN201510615763A CN105182856A CN 105182856 A CN105182856 A CN 105182856A CN 201510615763 A CN201510615763 A CN 201510615763A CN 105182856 A CN105182856 A CN 105182856A
- Authority
- CN
- China
- Prior art keywords
- circuit
- voltage
- alternating signal
- voltage alternating
- signal
- 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
Classifications
-
- 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
-
- 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
- G05B2219/30—Nc systems
- G05B2219/31—From computer integrated manufacturing till monitoring
- G05B2219/31094—Data exchange between modules, cells, devices, processors
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Dc Digital Transmission (AREA)
Abstract
The present invention discloses a high voltage alternating signal acquisition system which is composed of a voltage division circuit, a high speed signal acquisition circuit, an isolating circuit, a data processing circuit of a single-chip microcomputer and a serial data bus. The data processing circuit of the single-chip microcomputer solves high-voltage variable frequency signals acquired by the high speed signal acquisition circuit through a data fitting algorithm and the weighted handling, and transmits the solved result to outer side through the serial data bus, thereby realizing the real-time acquisition and transmission of the high voltage variable frequency signals. Compared with the prior art, the high voltage alternating signal acquisition system realizes the real-time acquisition and transmission of the alternating signals with wide voltage and wide range, simplifies the product hardware design, improves the product reliability and has the advantages of high acquisition precision, strong environment adaptability, good anti-jamming capability, reasonable structure, high automation degree, stable performance and the like.
Description
Technical field
The present invention relates to signal acquiring system, particularly relate to a kind of high-voltage alternating signal acquiring system.
Background technology
Existing high-voltage alternating signal acquiring system comprises reduction voltage circuit, rectification circuit, direct current signal modulate circuit and AD Acquisition Circuit theory diagram.Reduction voltage circuit: high-voltage signal is transformed into the low-voltage signal that AD Acquisition Circuit input end can bear; Rectification circuit: alternating signal is organized into direct current signal; Direct current signal modulate circuit: the direct current signal after being converted by AC-DC does the conditionings such as filtering; AD Acquisition Circuit: analog signals is changed into digital quantity signal and export.There is following shortcoming in aforementioned prior art:
1, acquisition precision is low, and device temperature influence in rectification circuit is larger;
2, high-voltage signal acquisition module powers on period at collection terminal voltage, can produce a very high high voltage surge.Extremely difficult this high voltage surge of suppression, very easily causes expendable damage to AD Acquisition Circuit;
3, utilize the product of prior art can only complete a kind of high-voltage signal collection of frequency, when needing the voltage signal gathering multi-frequency simultaneously, just need the Acquisition Circuit of multiple kind to realize, make the application of product have significant limitation;
4, adopt software algorithm to realize, speed has limitation, for external interference not easily filtering, and bad adaptability.
Summary of the invention
The present invention is to solve above-mentioned deficiency, provides a kind of high-voltage alternating signal acquiring system.
Above-mentioned purpose of the present invention is realized by following technical scheme: a kind of high-voltage alternating signal acquiring system, is characterized in that: be made up of the data processing circuit of bleeder circuit, high-speed signal acquisition circuit, buffer circuit, single-chip microcomputer and serial data bus; The data processing circuit of described single-chip microcomputer is by data fitting algorithms and weighting process, the high-pressure frequency-conversion signal of high-speed signal acquisition circuit collection is resolved, and outwards sent by serial data bus, thus realize Real-time Collection and the transmission of high pressure (36V ~ 1000V) alternative frequency (0Hz ~ 440Hz) signal.
Described bleeder circuit is that high-voltage alternating signal is transformed to low pressure alternating signal; Effectively suppress high voltage surge to the damage of back-end circuit for reaching, high-voltage signal is down to the low-voltage signal of about 80mV by front end bleeder circuit, and high voltage surge also reduces thereupon; And this technology decreases and uses components and parts kind and quantity.
Described high-speed signal acquisition circuit adopts 24 ultra high speed A/D conversion chips, improves acquisition precision, and the digital quantity signal after AD conversion is exported by serial port; By serial port communications, greatly reduce the possibility to back-end circuit damage.
Described buffer circuit comprises two parts, and Part I is high-speed signal acquisition circuit by the digital quantity signal after conversion through isolation and amplifier to single-chip microcomputer; Part II be single-chip microcomputer data processing circuit by after data processing through isolation and amplifier to RS232/RS422 port, then report host computer by RS232/RS422 port; RS232/RS422 port adopts ESD technology, effectively prevents the damage of electrostatic.
Not only the data processing circuit of described single-chip microcomputer, as the MCU of whole high-voltage alternating signal acquiring system, controls the workflow of whole system but also processes all data transmitted by signal acquisition circuit, finally complete the exchanges data in host computer.
Described power supply input have employed filtering, overcurrent, overvoltage correlation technique, and has protective device to reverse direct supply input; Adopt the reliability that improve product of this technology effective, security.
Described serial data bus carries out exchanges data by RS232 or RS422 two kinds of ports and host computer, and communication protocol is divided into 3 layers:
1, Physical layer: electrical connection adopts RS232/RS422 standard agreement;
2, transport layer protocol: the length that communication protocol agreement host computer sends Frame is 6 bytes, and the length that high-voltage alternating signal acquiring system program sends Frame is 29 bytes, 1 start bit, 8 data bit, no parity check position, 1 position of rest; Baud rate is 9600bps, and communication mode is simplex mode; The frequency of Frame is 4Hz;
3, application layer protocol: data communication is carried out in units of frame.
Table 1 data communication frame format
| Received frame | 0x23，0x30，0x31，0x41，0x0d，0x0a |
| Transmission frame | 0x3e+7 road (every road 4 byte) charge value |
The present invention's advantage is compared with prior art:
What 1, the present invention adopted is the ultra high speed A/D conversion chip of 24, and in data processing, has accomplished real-time update and carried out weighting process to data.So both solve the problem that original technical products acquisition precision is low, antijamming capability is weak, solve again the problem that original technical products can only complete a kind of high-voltage signal collection of frequency;
2, need in prior art use semiconductor devices convert alternating signal to direct current signal, semiconductor devices (particularly rectifier) is more responsive to temperature, particularly under cryogenic Acquisition Error reach ± 10%.The present invention effectively avoids this technological deficiency, does not carry out rectification and directly gathers alternating signal.System operating temperatures is made to meet higher requirement;
3, in order to effectively suppress high voltage surge, it is very low that high-voltage signal falls by native system, and high voltage surge is also reduced simultaneously.Meanwhile, the AD conversion chip selected can bear the high voltage surge of alternating signal;
4, pure hardware filtering, hardware algorithm, speed is high, strong adaptability;
5, use of the present invention is directly by communication port and main-machine communication, does not need to adopt bus folding Display Rack structure, and what both decreased that AD gathers that expansion board drives writes, debugs, and turn reduces the complexity of equipment, improves the reliability of equipment.
The present invention is owing to taking above-mentioned design, achieve Real-time Collection and the transmission of Width funtion, on a large scale alternating signal, simplify products-hardware design, improve the reliability of product, have that acquisition precision is high, environmental suitability is strong, antijamming capability is good, rational in infrastructure, automaticity is high, steady performance.
Accompanying drawing explanation
Fig. 1 is high-voltage alternating signal acquiring system composition frame chart of the present invention.
Fig. 2 is the schematic diagram of bleeder circuit in the present invention.
Fig. 3 is the schematic diagram of high speed data acquisition circuit of the present invention.
Fig. 4 is the data processing circuit schematic diagram of single-chip microcomputer in the present invention.
Fig. 5 is the circuit theory diagrams of serial data bus in the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
As shown in Figure 1, a kind of high-voltage alternating signal acquiring system, is made up of the data processing circuit of bleeder circuit, high-speed signal acquisition circuit, buffer circuit, single-chip microcomputer and serial data bus; The data processing circuit of described single-chip microcomputer is by data fitting algorithms and weighting process, the high-pressure frequency-conversion signal of high-speed signal acquisition circuit collection is resolved, and outwards sent by serial data bus, thus realize Real-time Collection and the transmission of high pressure (36V ~ 1000V) alternative frequency (0Hz ~ 440Hz) signal.
As shown in Figure 2, high-voltage alternating signal is transformed into low pressure alternating signal, employing be electric resistance partial pressure.Avoid the problem of serious interference after traditional transformer step-down, use electric resistance partial pressure to again save hardware cost simultaneously.
As shown in Figure 3, high-speed signal acquisition circuit can realize timing acquiring alternating signal by control CS-pin, and is transferred out by internal bus SPI by the digital quantity after conversion by control RS-/TX-pin.Overcome the loaded down with trivial details signal condition means such as the rectification of prior art, filtering.Use SPI isolating chip in the present invention, effectively prevent the damage of abnormal operation to MCU of leading portion.
As Figure 1 and Figure 4, the data of collection to be transferred to the data processing unit based on C8051F04 series by spi bus by high-speed signal acquisition circuit, in this data processing unit, by specific data fitting algorithms and weighting process, real-time resolving is carried out to received data, and draw actual value and the effective value of high-voltage alternating signal, then by serial data bus, final calculation result is sent.The mode of MCU and host computer exchanges data is divided into two kinds: one is that host computer sends request of data to MCU, the image data that after the MCU request of receiving, transmission processing is complete.Another kind is that MCU powers on the complete latest data of automatic transmission processing, sends any instruction without the need to host computer.
As shown in Figure 5, what the present invention adopted is carry out exchanges data by RS232 or RS422 serial communication mode and host computer, is conveniently connected with host computer, only needs host computer to have communication port.Other communication modes (RS485) can also be changed as required in addition.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize instructions of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (7)
1. a high-voltage alternating signal acquiring system, is characterized in that: be made up of the data processing circuit of bleeder circuit, high-speed signal acquisition circuit, buffer circuit, single-chip microcomputer and serial data bus; The data processing circuit of described single-chip microcomputer is by data fitting algorithms and weighting process, the high-pressure frequency-conversion signal of high-speed signal acquisition circuit collection is resolved, and outwards sent by serial data bus, thus realize Real-time Collection and the transmission of high pressure (36V ~ 1000V) alternative frequency (0Hz ~ 440Hz) signal.
2. a kind of high-voltage alternating signal acquiring system according to claim 1, is characterized in that: described bleeder circuit is that high-voltage alternating signal is transformed to low pressure alternating signal; Effectively suppress high voltage surge to the damage of back-end circuit for reaching, high-voltage signal is down to the low-voltage signal of about 80mV by front end bleeder circuit, and high voltage surge also reduces thereupon; And decrease and use components and parts kind and quantity.
3. a kind of high-voltage alternating signal acquiring system according to claim 1, is characterized in that: described high-speed signal acquisition circuit adopts 24 ultra high speed A/D conversion chips, improves acquisition precision, and the digital quantity signal after AD conversion is exported by serial port; By serial port communications, greatly reduce the possibility to back-end circuit damage.
4. a kind of high-voltage alternating signal acquiring system according to claim 1, is characterized in that: described buffer circuit comprises two parts, and Part I is high-speed signal acquisition circuit by the digital quantity signal after conversion through isolation and amplifier to single-chip microcomputer; Part II be single-chip microcomputer data processing circuit by after data processing through isolation and amplifier to RS232/RS422 port, then report host computer by RS232/RS422 port; RS232/RS422 port adopts ESD technology, effectively prevents the damage of electrostatic.
5. a kind of high-voltage alternating signal acquiring system according to claim 1, it is characterized in that: the data processing circuit of described single-chip microcomputer is as the MCU of whole high-voltage alternating signal acquiring system, not only control the workflow of whole system but also process all data transmitted by signal acquisition circuit, finally complete the exchanges data in host computer.
6. a kind of high-voltage alternating signal acquiring system according to claim 1, is characterized in that: described power supply input have employed filtering, overcurrent, overvoltage technology, and has protective device to reverse direct supply input.
7. a kind of high-voltage alternating signal acquiring system according to claim 1, is characterized in that: described serial data bus carries out exchanges data by RS232 or RS422 two kinds of ports and host computer, and communication protocol is divided into 3 layers:
(1) Physical layer: electrical connection adopts RS232/RS422 standard agreement;
(2) transport layer protocol: the length that communication protocol agreement host computer sends Frame is 6 bytes, and the length that high-voltage alternating signal acquiring system program sends Frame is 29 bytes, 1 start bit, 8 data bit, no parity check position, 1 position of rest; Baud rate is 9600bps, and communication mode is simplex mode; The frequency of Frame is 4Hz;
(3) application layer protocol: data communication is carried out in units of frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510615763.1A CN105182856A (en) | 2015-09-24 | 2015-09-24 | High voltage alternating signal acquisition system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510615763.1A CN105182856A (en) | 2015-09-24 | 2015-09-24 | High voltage alternating signal acquisition system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105182856A true CN105182856A (en) | 2015-12-23 |
Family
ID=54905001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510615763.1A Pending CN105182856A (en) | 2015-09-24 | 2015-09-24 | High voltage alternating signal acquisition system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105182856A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107018614A (en) * | 2017-05-18 | 2017-08-04 | 益阳市首航电子科技有限公司 | Navigation light communication protocol |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2061287U (en) * | 1989-12-22 | 1990-08-29 | 孟越峰 | Multifunctional intelligence type kilowatt-hour meter |
| US20070197168A1 (en) * | 2006-01-31 | 2007-08-23 | Advantest Corporation | Measurement apparatus, test apparatus, and measurement method |
| CN101118253A (en) * | 2006-07-31 | 2008-02-06 | 深圳市计量质量检测研究院 | High-frequency high-pressure measurement mechanism |
| CN201796082U (en) * | 2009-09-22 | 2011-04-13 | 北京杜朗自动化系统技术有限公司 | Intelligent device for measuring current, voltage and power |
| CN102540101A (en) * | 2012-03-01 | 2012-07-04 | 宁德新能源科技有限公司 | Integrated device for detecting high-pressure value and insulating resistance value of battery pack |
| CN103353550A (en) * | 2013-04-24 | 2013-10-16 | 武汉大学 | Method for measuring signal frequency and harmonic parameters of electric power system |
-
2015
- 2015-09-24 CN CN201510615763.1A patent/CN105182856A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2061287U (en) * | 1989-12-22 | 1990-08-29 | 孟越峰 | Multifunctional intelligence type kilowatt-hour meter |
| US20070197168A1 (en) * | 2006-01-31 | 2007-08-23 | Advantest Corporation | Measurement apparatus, test apparatus, and measurement method |
| CN101118253A (en) * | 2006-07-31 | 2008-02-06 | 深圳市计量质量检测研究院 | High-frequency high-pressure measurement mechanism |
| CN201796082U (en) * | 2009-09-22 | 2011-04-13 | 北京杜朗自动化系统技术有限公司 | Intelligent device for measuring current, voltage and power |
| CN102540101A (en) * | 2012-03-01 | 2012-07-04 | 宁德新能源科技有限公司 | Integrated device for detecting high-pressure value and insulating resistance value of battery pack |
| CN103353550A (en) * | 2013-04-24 | 2013-10-16 | 武汉大学 | Method for measuring signal frequency and harmonic parameters of electric power system |
Non-Patent Citations (2)
| Title |
|---|
| 中国电子学会教育工作委员会: "《创新人才培养与实践教学改革》", 31 August 2008, 成都：电子科技大学出版社 * |
| 国网山西省电力公司: "《特高压交流变电运维检修技能培训教材》", 31 December 2014, 北京：中国水利水电出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107018614A (en) * | 2017-05-18 | 2017-08-04 | 益阳市首航电子科技有限公司 | Navigation light communication protocol |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105572453A (en) | Voltage acquisition electronic sensor apparatus | |
| CN202679686U (en) | Voltage sampling and surge protection circuit of electromagnetic stove | |
| CN102331522B (en) | Isolated voltage acquisition circuit for light transmission equipment | |
| CN205786995U (en) | Direct current transportation Thyristors in series all presses performance detecting system and voltage check device | |
| CN204666729U (en) | A kind of capacitive apparatus medium loss measuring device with electricity | |
| CN104077260B (en) | A kind of concentrator M BUS host communication interface arrangements | |
| CN105182856A (en) | High voltage alternating signal acquisition system | |
| CN106908684B (en) | Multipoint measuring device for live-line detection of metal oxide arrester | |
| CN203178369U (en) | Bushing monitoring system for intelligent substation | |
| CN105092947B (en) | A kind of over-voltage monitoring system and method for three-phase circuit | |
| CN107069649A (en) | A kind of electrical load safety operation control system | |
| CN204142835U (en) | A kind of single-phase electric energy meter | |
| CN202837390U (en) | Power factor detection circuit | |
| CN205610225U (en) | Transformer excess load automatic switching control equipment | |
| CN210720502U (en) | Electronic transformer acquisition equipment for realizing common power supply and common ground | |
| CN203849585U (en) | Microcomputer protection device switching value detection circuit | |
| CN204188339U (en) | A kind of network distribution transformer fuel tank sealing exponential forecasting device | |
| CN203490323U (en) | Electronic transformer-based travelling wave fault location system | |
| CN203455388U (en) | Current and temperature monitoring system applied to industrial environment | |
| CN203135585U (en) | Four-in-one device integrating functions of protection, control, measurement and reactive power switch and used for transformer substation | |
| CN206147038U (en) | Electric power system partial discharge monitoring device | |
| CN105444787A (en) | Direct current transmitter with high reliability | |
| CN205982422U (en) | Infrared communication electric energy meter | |
| CN205246745U (en) | Electrified detecting instrument of portable arrester based on wireless synchronization technique | |
| CN203241481U (en) | Middle-high voltage open-phase detecting alarm |
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: 20151223 |
|
| RJ01 | Rejection of invention patent application after publication |