CN111856278A - Multichannel multi-range frequency response test signal acquisition device and acquisition method - Google Patents
Multichannel multi-range frequency response test signal acquisition device and acquisition method Download PDFInfo
- Publication number
- CN111856278A CN111856278A CN202010775606.8A CN202010775606A CN111856278A CN 111856278 A CN111856278 A CN 111856278A CN 202010775606 A CN202010775606 A CN 202010775606A CN 111856278 A CN111856278 A CN 111856278A
- Authority
- CN
- China
- Prior art keywords
- acquisition
- channel
- terminal
- voltage
- frequency response
- 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
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/34—Testing dynamo-electric machines
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R23/00—Arrangements for measuring frequencies; Arrangements for analysing frequency spectra
- G01R23/02—Arrangements for measuring frequency, e.g. pulse repetition rate; Arrangements for measuring period of current or voltage
Abstract
The invention discloses a multi-channel multi-range frequency response test signal acquisition device and an acquisition method, wherein the multi-channel multi-range frequency response test signal acquisition device comprises an acquisition channel, wherein the acquisition channel is connected with an AD conversion module through a wire; the AD conversion module is connected with the USB interface; the USB interface is connected with the monitoring terminal; the acquisition channel comprises a voltage acquisition channel, a current acquisition channel, a frequency acquisition channel and a rotating speed acquisition channel; an acquisition terminal of an acquisition channel is connected to a signal output end of a prime motor, an acquisition device converts acquired analog quantity signals into digital quantity signals through an AD module, and then the digital quantity signals are sent to a monitoring terminal through a USB interface for signal processing; the problem of prior art to the frequency response test when using general oscillograph to carry out the frequency response test, need external components and parts to carry out voltage current conversion respectively and measure, record the range and mismatch and cause and record precision and descend the grade is solved.
Description
Technical Field
The invention belongs to the technical field of power generation equipment testing, and particularly relates to a multichannel multi-range frequency response test signal acquisition device and an acquisition method.
Background
With the rapid development of electric power utilities, the capacity of a power grid is increased sharply, and large-scale new energy is merged into the power grid on the basis of traditional energy, so that the stability of the power grid is in danger, and the problems of primary frequency modulation and the like are increasingly prominent. The power supply is ensured to be safe and reliable, the quality of electric energy is ensured to be the basic requirement of the operation of the power system, when a certain unit is in fault shutdown, great influence can be generated in a power grid, large frequency fluctuation can occur on the frequency of the power grid in response, and when the frequency fluctuation exceeds a certain limit value, serious threat can be caused to the power grid and access equipment on the power grid. Therefore, in order to meet the basic requirements of power grid operation, a primary frequency modulation equal frequency response test needs to be developed, and the frequency of all generator sets is guaranteed to be consistent. Therefore, the frequency response test is an important means for ensuring the safety of the power plant equipment, and is the key for ensuring the stability of the power grid frequency.
At present, a general wave recorder is widely adopted in a frequency response test for recording parameters, but the following problems mainly exist: firstly, the system connection is complicated, the frequency response characteristic is poor, the acquisition precision is low, and the recording equipment adopts external components and parts to carry out the conversion of voltage, current signal, and the easy distortion of acquisition signal can't really transmit the signal and lead to the acquisition precision low. Secondly, voltage and frequency signals of the wave recording equipment are input in a fixed range mode, so that the requirements of different field test scenes and large parameter changes of the voltage and frequency signals cannot be met, and the recording precision is reduced due to mismatching of the recording range. Therefore, the current universal wave recorder cannot well meet the field requirement of the frequency response test.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the utility model provides a frequency response test signal acquisition device and collection method of multichannel multirange to solve prior art and when using general oscillograph to carry out the frequency response test to the frequency response test, need external components and parts to carry out voltage current conversion measurement, record the range and mismatch and cause and record the scheduling problem that the precision descends.
The technical scheme of the invention is as follows:
a multi-channel multi-range frequency response test signal acquisition device comprises an acquisition channel, wherein the acquisition channel is connected with an AD conversion module through a wire; the AD conversion module is connected with the USB interface; the USB interface is connected with the monitoring terminal; the acquisition channel comprises a voltage acquisition channel, a current acquisition channel, a frequency acquisition channel and a rotating speed acquisition channel.
The voltage acquisition channel and the current acquisition channel are 24 channels; each channel is provided with three measurement acquisition terminals, namely a red voltage acquisition terminal, a blue current acquisition terminal and a black public terminal; and a red voltage acquisition terminal and a black public terminal are connected when the voltage is measured and acquired, and a blue current acquisition terminal and a black public terminal are connected when the current is measured and acquired.
The frequency acquisition channel has one, is divided into two kinds of voltage range of 0~150Vrms, 150~400Vrms, and three measurement acquisition terminal altogether, and one of them terminal is public end, and other two adopt different measurement acquisition terminal respectively: when the frequency signal voltage is within 150Vrms, a red terminal and a black terminal are connected; when the frequency signal voltage is within 150Vrms to 400Vrms, a red terminal and a black terminal are connected.
The rotating speed acquisition channel is provided with the number of teeth of a dial plate of the rotating speed probe measuring instrument.
The voltage acquisition channels 24 have two voltage ranges of-10V to 10V and-400V to 400V, the voltage acquisition channels 24 are provided with measurement acquisition terminals of-10V to 10V, the red voltage acquisition terminals and the black common terminals are connected when voltage signals are acquired, and the measurement acquisition functions of-400V to 400V are added to the channels 17 to 24.
The high-voltage direct-current power supply also comprises an alternating-current and direct-current transformer, wherein the alternating-current and direct-current transformer is in the model number of MAK500-220S28, is provided with a single output channel, and outputs in a direct-current mode.
The model of the AD conversion module is DMM-32X-AT.
The current acquisition channel has an acquisition range of-20 mA; the acquisition range of the frequency signal measurement channel is 45 Hz-55 Hz, and the frequency resolution is 0.001 Hz; the acquisition range of the rotating speed signal acquisition channel is 0-3300 r/min, and the resolution is 0.06 r/min.
The acquisition method comprises the following steps: the acquisition terminal of gathering the passageway is received prime mover signal output end, and the analog signal that collection device will gather passes through AD module conversion to the digital signal, then sends to monitor terminal through the USB interface and carries out signal processing.
The invention has the beneficial effects that:
the invention has complete channel types, comprises a plurality of measurement and acquisition channels of voltage/current, frequency, rotating speed and the like, has a 24V voltage output channel and meets all requirements of a frequency response test; the measuring range of the invention is graded, and the requirements of measuring range and precision are met; the rotating speed measuring device has the function of setting the number of teeth of a dial plate of the rotating speed measuring device, and meets the requirements of different rotating speed measuring disks on site; the acquisition end of the acquisition channel is directly connected with the AD module to realize signal conversion, and the converted digital signal is directly sent to the monitoring terminal through the USB; the problem of prior art to the frequency response test when using general oscillograph to carry out the frequency response test, need external components and parts to carry out voltage current conversion respectively and measure, record the range and mismatch and cause and record precision and descend the grade is solved.
Drawings
FIG. 1 is a schematic view of the structure of the present invention.
Detailed Description
A multi-channel multi-range frequency response test signal acquisition device and an acquisition method comprise 24 voltage and current measurement acquisition channels, 1 frequency signal measurement acquisition channel and 1 rotating speed signal measurement acquisition channel. After data are collected, the data are transmitted to a computer through an A/D conversion module and a USB interface, and a 24V voltage output channel is provided.
The voltage and current signal measurement and collection has 24 channels, the frequency signal measurement and collection is 1 channel, and the rotating speed signal measurement and collection is 1 channel, and meets all requirements of a frequency response test.
The voltage and the current are three measurement and acquisition terminals which are respectively red (voltage), blue (current) and black (common terminal GND), wherein the black terminal is a common terminal, the voltage terminal and the common terminal are accessed when the voltage is measured and acquired, and the current terminal and the common terminal are accessed when the current is measured and acquired. Namely, the red and black terminals (common terminal GND) are connected when voltage signals are collected; when collecting current signals: the blue and black terminals (common terminal GND) are connected.
The voltage measurement and acquisition channel has two voltage ranges of-10V to 10V and-400V, and different measurement and acquisition terminals are respectively adopted. All have-10 ~10V to measure and gather the terminal in the 24 passageways, connect red (10V) and black terminal (common terminal GND) when gathering voltage signal, 17~24 passageways increase 400V range and measure the collection function, connect red (400V) and black terminal (common terminal GND).
The current measurement acquisition range is-20 mA.
The frequency acquisition channel has one, is divided into two kinds of ranges of 0~150Vrms, 150~400Vrms, totally three measurement acquisition terminals, and one of them terminal is public terminal, and other two adopt different measurement acquisition terminals respectively: when the frequency signal voltage is within 150Vrms, a red terminal (150 Vrms) and a black terminal (a common terminal GND) are connected; when the frequency signal voltage is within 150Vrms to 400Vrms, a red terminal (400 Vrms) and a black terminal (common terminal GND) are connected.
The rotating speed measurement acquisition channel can be provided with the number of teeth of a dial plate of the rotating speed probe measuring instrument, so that the requirements of different rotating speed measuring disks on site are met.
The A/D conversion module adopts DMM-32X-AT type.
The frequency signal measurement acquisition range is 45 Hz-55 Hz, and the frequency resolution is 0.001 Hz.
The measuring and collecting range of the rotating speed signal is 0-3300 r/min, and the resolution is 0.06 r/min.
The power supply comprises an 220/24V alternating current-direct current transformer, has a single output channel, and outputs in a direct current mode.
The 220/24V AC/DC transformer is of MAK500-220S28 type.
Claims (9)
1. The utility model provides a frequency response test signal pickup assembly of multichannel multirange, it includes the acquisition channel, its characterized in that: the acquisition channel is connected with the AD conversion module through a wire; the AD conversion module is connected with the USB interface; the USB interface is connected with the monitoring terminal; the acquisition channel comprises a voltage acquisition channel, a current acquisition channel, a frequency acquisition channel and a rotating speed acquisition channel.
2. The multi-channel multi-range frequency response test signal acquisition device according to claim 1, characterized in that: the voltage acquisition channel and the current acquisition channel are 24 channels; each channel is provided with three measurement acquisition terminals, namely a red voltage acquisition terminal, a blue current acquisition terminal and a black public terminal; and a red voltage acquisition terminal and a black public terminal are connected when the voltage is measured and acquired, and a blue current acquisition terminal and a black public terminal are connected when the current is measured and acquired.
3. The multi-channel multi-range frequency response test signal acquisition device according to claim 1, characterized in that: the frequency acquisition channel has one, is divided into two kinds of voltage range of 0~150Vrms, 150~400Vrms, and three measurement acquisition terminal altogether, and one of them terminal is public end, and other two adopt different measurement acquisition terminal respectively: when the frequency signal voltage is within 150Vrms, a red terminal and a black terminal are connected; when the frequency signal voltage is within 150Vrms to 400Vrms, a red terminal and a black terminal are connected.
4. The multi-channel multi-range frequency response test signal acquisition device according to claim 1, characterized in that: the rotating speed acquisition channel is provided with the number of teeth of a dial plate of the rotating speed probe measuring instrument.
5. The multi-channel multi-range frequency response test signal acquisition device according to claim 2, characterized in that: the voltage acquisition channels 24 have two voltage ranges of-10V to 10V and-400V to 400V, the voltage acquisition channels 24 are provided with measurement acquisition terminals of-10V to 10V, the red voltage acquisition terminals and the black common terminals are connected when voltage signals are acquired, and the measurement acquisition functions of-400V to 400V are added to the channels 17 to 24.
6. The multi-channel multi-range frequency response test signal acquisition device according to claim 1, characterized in that: the high-voltage direct-current power supply also comprises an alternating-current and direct-current transformer, wherein the alternating-current and direct-current transformer is in the model number of MAK500-220S28, is provided with a single output channel, and outputs in a direct-current mode.
7. The multi-channel multi-range frequency response test signal acquisition device according to claim 1, characterized in that: the model of the AD conversion module is DMM-32X-AT.
8. The multi-channel multi-range frequency response test signal acquisition device according to claim 2, characterized in that: the current acquisition channel has an acquisition range of-20 mA; the acquisition range of the frequency signal measurement channel is 45 Hz-55 Hz, and the frequency resolution is 0.001 Hz; the acquisition range of the rotating speed signal acquisition channel is 0-3300 r/min, and the resolution is 0.06 r/min.
9. The acquisition method of the multi-channel multi-range frequency response test signal acquisition device according to claim 1, characterized in that: the acquisition method comprises the following steps: the acquisition terminal of gathering the passageway is received prime mover signal output end, and the analog signal that collection device will gather passes through AD module conversion to the digital signal, then sends to monitor terminal through the USB interface and carries out signal processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010775606.8A CN111856278A (en) | 2020-08-05 | 2020-08-05 | Multichannel multi-range frequency response test signal acquisition device and acquisition method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010775606.8A CN111856278A (en) | 2020-08-05 | 2020-08-05 | Multichannel multi-range frequency response test signal acquisition device and acquisition method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111856278A true CN111856278A (en) | 2020-10-30 |
Family
ID=72970981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010775606.8A Pending CN111856278A (en) | 2020-08-05 | 2020-08-05 | Multichannel multi-range frequency response test signal acquisition device and acquisition method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111856278A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329812A (en) * | 2008-07-24 | 2008-12-24 | 东南大学 | Multi-channel and high-accuracy data acquisition unit |
| CN201788237U (en) * | 2009-12-31 | 2011-04-06 | 西安爱邦电气有限公司 | Handheld electric wave recording analyzer |
| CN201984318U (en) * | 2011-03-07 | 2011-09-21 | 深圳市华邦德科技有限公司 | Multifunctional multi-channel data acquisition on-site controller |
| CN202421479U (en) * | 2011-12-24 | 2012-09-05 | 青岛艾诺智能仪器有限公司 | Multi-parameter test device |
| CN103018605A (en) * | 2012-12-11 | 2013-04-03 | 工业和信息化部电子第五研究所 | Electronic component detection test monitoring system |
| CN204287285U (en) * | 2014-11-13 | 2015-04-22 | 昆山凯捷特电子研发科技有限公司 | Capture card measured by a kind of multimeter |
| CN204374699U (en) * | 2015-01-28 | 2015-06-03 | 东莞理工学院 | A kind of network industrial signal pickup assembly |
| CN105067125A (en) * | 2015-08-04 | 2015-11-18 | 西安昆仑工业（集团）有限责任公司 | Artillery high-speed colorimetric infrared temperature measurement device and method |
| CN205232200U (en) * | 2015-12-31 | 2016-05-11 | 绵阳绵仪电子科技有限公司 | Multrirange signal pickup assembly |
| CN205374585U (en) * | 2015-11-12 | 2016-07-06 | 湖北一彰科技有限责任公司 | Current collection device |
| CN209215493U (en) * | 2018-10-31 | 2019-08-06 | 河南辉煌科技股份有限公司 | A kind of railway signal measuring device |
| CN209542698U (en) * | 2019-01-10 | 2019-10-25 | 深圳市中创智合科技有限公司 | A kind of multi-channel DC voltage and current collector of high-speed, high precision |
-
2020
- 2020-08-05 CN CN202010775606.8A patent/CN111856278A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101329812A (en) * | 2008-07-24 | 2008-12-24 | 东南大学 | Multi-channel and high-accuracy data acquisition unit |
| CN201788237U (en) * | 2009-12-31 | 2011-04-06 | 西安爱邦电气有限公司 | Handheld electric wave recording analyzer |
| CN201984318U (en) * | 2011-03-07 | 2011-09-21 | 深圳市华邦德科技有限公司 | Multifunctional multi-channel data acquisition on-site controller |
| CN202421479U (en) * | 2011-12-24 | 2012-09-05 | 青岛艾诺智能仪器有限公司 | Multi-parameter test device |
| CN103018605A (en) * | 2012-12-11 | 2013-04-03 | 工业和信息化部电子第五研究所 | Electronic component detection test monitoring system |
| CN204287285U (en) * | 2014-11-13 | 2015-04-22 | 昆山凯捷特电子研发科技有限公司 | Capture card measured by a kind of multimeter |
| CN204374699U (en) * | 2015-01-28 | 2015-06-03 | 东莞理工学院 | A kind of network industrial signal pickup assembly |
| CN105067125A (en) * | 2015-08-04 | 2015-11-18 | 西安昆仑工业（集团）有限责任公司 | Artillery high-speed colorimetric infrared temperature measurement device and method |
| CN205374585U (en) * | 2015-11-12 | 2016-07-06 | 湖北一彰科技有限责任公司 | Current collection device |
| CN205232200U (en) * | 2015-12-31 | 2016-05-11 | 绵阳绵仪电子科技有限公司 | Multrirange signal pickup assembly |
| CN209215493U (en) * | 2018-10-31 | 2019-08-06 | 河南辉煌科技股份有限公司 | A kind of railway signal measuring device |
| CN209542698U (en) * | 2019-01-10 | 2019-10-25 | 深圳市中创智合科技有限公司 | A kind of multi-channel DC voltage and current collector of high-speed, high precision |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103257286A (en) | Method and system of automatic testing of electric automobile charging facilities | |
| CN207730875U (en) | A kind of wind-driven generator winding insulation failure detector | |
| CN101614798B (en) | Polarity detection system of electronic transformer | |
| CN112381467A (en) | Artificial intelligence line loss analysis system based on big data of distribution station district total collection | |
| CN201819940U (en) | Special multichannel electrical isolation digital oscilloscope for electric power detection | |
| CN108318732B (en) | On-line monitoring device and method for grounding current of transformer core | |
| CN102928778B (en) | A kind of three-phase motor of nuclear power station starts overall characteristic test system | |
| CN201965224U (en) | Automatic school system that examines of proof voltage instrument | |
| CN112904147B (en) | Power transmission line fault and pre-discharge monitoring device and signal processing method | |
| CN111856278A (en) | Multichannel multi-range frequency response test signal acquisition device and acquisition method | |
| CN201166685Y (en) | Wide band high voltage intelligent resistance voltage division type voltage sensor | |
| CN112505610A (en) | Voltage transformer insulation and metering performance integrated test device and method for metering of 35kV and below | |
| CN201576046U (en) | Condition monitoring and data recording system used on subway traction inverter | |
| CN201126447Y (en) | Numeralization electric energy metered system | |
| CN111896806A (en) | Frequency response test system and test method | |
| CN211426639U (en) | Accurate measurement system for ground grid of operating transformer substation | |
| CN106526303B (en) | A kind of the C-V characteristic test device and method of solid decoupling device | |
| CN106772190A (en) | The test comparison method and device of electronic type voltage transformer under the conditions of a kind of VFTO | |
| CN202120080U (en) | Transformer temperature rise automatic measurement and control system | |
| CN107769175B (en) | Method and device for judging overvoltage in power grid | |
| CN218445705U (en) | High-precision measurement system for time-varying power and frequency of power grid | |
| CN210665937U (en) | Lightning arrester insulation on-line monitoring system based on optical fiber digitization | |
| CN214042086U (en) | Signal controller of electric power system data recording analyzer | |
| CN201464596U (en) | Electronic transducer polarity detecting system | |
| CN216485455U (en) | Wireless remote control polarity test system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |