CN205157636U - Alternating current acquisition circuit that pottery mechanical equipment used - Google Patents
Alternating current acquisition circuit that pottery mechanical equipment used Download PDFInfo
- Publication number
- CN205157636U CN205157636U CN201520816987.4U CN201520816987U CN205157636U CN 205157636 U CN205157636 U CN 205157636U CN 201520816987 U CN201520816987 U CN 201520816987U CN 205157636 U CN205157636 U CN 205157636U
- Authority
- CN
- China
- Prior art keywords
- circuit
- output terminal
- operational amplifier
- reference voltage
- resistance
- 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.)
- Withdrawn - After Issue
Links
Landscapes
- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model relates to an alternating current acquisition circuit that pottery mechanical equipment used, the circuit includes electric current collection network, operational amplifier circuit, reference voltage circuit and singlechip. The output of electric current collection network is connected with operational amplifier circuit's non inverting input end, and the output of reference voltage circuit is connected with operational amplifier circuit's non inverting input end, and the ADC input of singlechip is connected to operational amplifier circuit's output. Operational amplifier circuit has adopted differential amplifier circuit, shifts through the level and improves incoming signal voltage, has solved single power during operation operational amplifier problem of 0V output completely, has realized alternating current's two -way collection moreover, and the range is wide, and the precision is high. Alternating current acquisition circuit uses single mains operated, has reduced power supply, does not increase acquisition circuit's complexity moreover, and circuit structure is succinct, and the cost is practiced thrift to easy the realization.
Description
Technical field
The utility model belongs to electronic technology and signal detection technique field, is specifically related to a kind of AC current collecting circuit of ceramic machinery equipment use.
Background technology
At present, in the occasion of general ceramic machinery equipment Inspection alternating current, can realize in the amplifying circuit of bipolar voltage output, power supply mode is all that negative and positive dual power is powered, if employing single power supply, then amplifier exports necessarily positive voltage, and can not export negative voltage.Simultaneously, when single power supply, the output saturation of amplifier input amplifier when a few below mV, namely in single supply work, amplifier can not export by 0V completely, this causes great trouble to the negative current part detecting alternating current, brings very large error to the AD sampling processing of single-chip microcomputer.In addition, adopt dual power supply than single power supply Duo Liao one road negative supply, add cost, resource is not fully utilized.
Utility model content
In order to solve the problem, under the prerequisite reducing power supply, current collection circuit complicacy of not increasing exchanges, the utility model provides a kind of structure AC current collecting circuit that is simple, that easily realize, to realize the accurate detection that single-chip microcomputer carries out alternating current under the condition of single power supply.
The technical solution of the utility model is: a kind of AC current collecting circuit of ceramic machinery equipment use, comprises current acquisition network, operational amplification circuit, reference voltage circuit and single-chip microcomputer; This circuit is connected with the in-phase input end of described operational amplification circuit by the output terminal of described current acquisition network, the output terminal of described reference voltage circuit is connected with the in-phase input end of described operational amplification circuit, and the output terminal of described operational amplification circuit connects the ADC input end of described single-chip microcomputer; Be characterized in: described operational amplification circuit is made up of operational amplifier OP1, resistance R1, R2, R3, R4, R8, electric capacity C3, C4, wherein said operational amplifier OP1 is powered by single supply+5V; Described operational amplifier OP1 and described resistance R1, R2, R3, R4 form differential operational amplifying circuit, amplify and level moves process to input ac voltage signal, generating positive and negative voltage input is converted to positive voltage and exports; The output terminal of described operational amplifier OP1 is connected to inverting input by described resistance R3, and the inverting input of described operational amplifier OP1 is by described resistance R1 ground connection; The in-phase input end of described operational amplifier OP1 draws the input end of a terminal as described operational amplification circuit by described resistance R2, and is connected to the output terminal of described current acquisition network; The in-phase input end of described operational amplifier OP1 draws the input end of a terminal as described operational amplification circuit by described resistance R4, and is connected to the output terminal of described reference voltage circuit; Described resistance R8 and described electric capacity C4 RC low-pass filter network in series, connect the output terminal of described operational amplifier OP1 in one end of described resistance R8, other end ground connection, adjacent terminal of drawing between the two is as the output terminal of operational amplification circuit.
Described current acquisition network comprises: current transformer (CT1), precision resister (R
l) and filter capacitor (C1), the output terminal of wherein said current transformer (CT1) is correspondingly connected to described precision resister (R
l) two ends, described precision resister (R
l) two ends be correspondingly connected to the two ends of described filter capacitor (C1), and described precision resister (R
l) output terminal as current acquisition network is drawn in one end of being connected with described filter capacitor (C1), and other end ground connection.
Described reference voltage circuit is made up of reference voltage circuit, bleeder circuit and voltage follower, wherein said reference voltage circuit is connected to power supply+5V by resistance R5 and electric capacity C2 connection leading-out terminal, the other end ground connection of electric capacity C2, the other end of resistance R5 is connected with three-terminal shunt regulator U1 and exports the reference voltage of 2.5V, and leading-out terminal is as the output terminal of reference voltage circuit; Described bleeder circuit carries out dividing potential drop to reference voltage 2.5V, is composed in series by precision resister R6, R7, and its one end connects the output terminal of reference voltage 2.5V, other end ground connection, and resistance in series connecting place leading-out terminal is as the output terminal of bleeder circuit; Described voltage follower is connected to the output terminal of described bleeder circuit by the in-phase input end of operational amplifier OP2, and inverting input is connected to its output terminal, and from the output terminal of the output terminal leading-out terminal of operational amplifier OP2 circuit as the reference voltage.
Described single-chip microcomputer adopts integrated circuit (IC) chip, it has the ADC module carried, the input port of the ADC module of described single-chip microcomputer receives the output signal (Uo) from described operational amplification circuit, and carries out AD conversion to this output signal (Uo) and carry out logic analysis.
The beneficial effects of the utility model are as follows: operational amplification circuit have employed differential operational amplifying circuit, by level shift, applied signal voltage is improved, solve single supply work time operational amplifier can not completely 0V output problem, realize again the two-way collection to alternating current, broad quantum, precision is high.AC current collecting circuit uses single power supply, decreases power supply, and does not increase the complicacy of Acquisition Circuit, and circuit structure is succinct, easily realizes, cost-saving.
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is overall circuit schematic diagram of the present utility model;
Embodiment
The utility model is as shown in Figure 1: a kind of AC current collecting circuit of ceramic machinery equipment use, comprises current acquisition network, operational amplification circuit, reference voltage circuit and single-chip microcomputer; This circuit is connected with the in-phase input end of described operational amplification circuit by the output terminal of described current acquisition network, the output terminal of described reference voltage circuit is connected with the in-phase input end of described operational amplification circuit, and the output terminal of described operational amplification circuit connects the ADC input end of described single-chip microcomputer; Be characterized in: described operational amplification circuit is made up of operational amplifier OP1, resistance R1, R2, R3, R4, R8, electric capacity C3, C4, wherein said operational amplifier OP1 is powered by single supply+5V; Described operational amplifier OP1 and described resistance R1, R2, R3, R4 form differential operational amplifying circuit, amplify and level moves process to input ac voltage signal, generating positive and negative voltage input is converted to positive voltage and exports; The output terminal of described operational amplifier OP1 is connected to inverting input by described resistance R3, and the inverting input of described operational amplifier OP1 is by described resistance R1 ground connection; The in-phase input end of described operational amplifier OP1 draws the input end of a terminal as described operational amplification circuit by described resistance R2, and is connected to the output terminal of described current acquisition network; The in-phase input end of described operational amplifier OP1 draws the input end of a terminal as described operational amplification circuit by described resistance R4, and is connected to the output terminal of described reference voltage circuit; Described resistance R8 and described electric capacity C4 RC low-pass filter network in series, connect the output terminal of described operational amplifier OP1 in one end of described resistance R8, other end ground connection, adjacent terminal of drawing between the two is as the output terminal of operational amplification circuit.
Described current acquisition network comprises: current transformer (CT1), precision resister (R
l) and filter capacitor (C1), the output terminal of wherein said current transformer (CT1) is correspondingly connected to described precision resister (R
l) two ends, described precision resister (R
l) two ends be correspondingly connected to the two ends of described filter capacitor (C1), and described precision resister (R
l) output terminal as current acquisition network is drawn in one end of being connected with described filter capacitor (C1), and other end ground connection.
Described reference voltage circuit is made up of reference voltage circuit, bleeder circuit and voltage follower, wherein said reference voltage circuit is connected to power supply+5V by resistance R5 and electric capacity C2 connection leading-out terminal, the other end ground connection of electric capacity C2, the other end of resistance R5 is connected with three-terminal shunt regulator U1 and exports the reference voltage of 2.5V, and leading-out terminal is as the output terminal of reference voltage circuit; Described bleeder circuit carries out dividing potential drop to reference voltage 2.5V, is composed in series by precision resister R6, R7, and its one end connects the output terminal of reference voltage 2.5V, other end ground connection, and resistance in series connecting place leading-out terminal is as the output terminal of bleeder circuit; Described voltage follower is connected to the output terminal of described bleeder circuit by the in-phase input end of operational amplifier OP2, and inverting input is connected to its output terminal, and from the output terminal of the output terminal leading-out terminal of operational amplifier OP2 circuit as the reference voltage.
Described single-chip microcomputer adopts integrated circuit (IC) chip, it has the ADC module carried, the input port of the ADC module of described single-chip microcomputer receives the output signal (Uo) from described operational amplification circuit, and carries out AD conversion to this output signal (Uo) and carry out logic analysis.
Detect electric current and be converted to current signal I needed for measurement through the Current Transmit 1 of current acquisition network
in, then current signal I
inthrough precision resister R
lafter convert measurable voltage signal to, after electric capacity C1 filtering, enter the input end of operational amplification circuit.Wherein, precision resister R
lit is the build-out resistor of Current Transmit 1.
Reference voltage circuit comprises reference voltage circuit, bleeder circuit and voltage follower, and the translation level that this circuit produces a 1.5V outputs to the input end of operational amplification circuit.Reference voltage circuit produces the normal voltage of 2.5V, and is powered by positive supply+5V, and bleeder circuit will export the input end of voltage to voltage follower of 1.5V after 2.5V dividing potential drop, 1.5V voltage is delivered to the input end of operational amplification circuit by voltage follower again.
Operational amplifier OP1 and resistance R1, R2, R3, R4 constitute differential operational amplifying circuit, and superpose a translation level at the in-phase input end of input voltage signal, input voltage is adjusted to unidirectional positive voltage scope by two-way generating positive and negative voltage scope, when making the input of operational amplifier OP1 remain on a few more than mV, operational amplifier OP1 just can not output saturation.Resistance R8, electric capacity C4 form RC low-pass filter network, will deliver to the ADC input end of single-chip microcomputer again after the high frequency noise filtering of the output voltage signal of differential operational amplifying circuit.
Single-chip microcomputer adopts integrated circuit (IC) chip, and it has the ADC module carried, and can sample to the input signal of 0 ~ 5V; The input port of the ADC module of single-chip microcomputer receives the output signal (Uo) from operational amplification circuit, and carries out AD conversion to this output signal (Uo) and carry out logic analysis.
During described circuit working, in Fig. 1 the output voltage of operational amplifier OP1 and input current relation as follows:
Through foregoing circuit, by the parameter of adjusting resistance R1, R2, R3, R4, R6, R7, make the scope of the output voltage of operational amplifier OP1 within 0 ~ 3.5V, this signal after filtering after directly can deliver to single-chip microcomputer ADC input end detect, thus to the precise acquisition of alternating current when realizing single power supply.
Claims (4)
1. an AC current collecting circuit for ceramic machinery equipment use, comprises current acquisition network (1), operational amplification circuit (2), reference voltage circuit (3) and single-chip microcomputer (4), this circuit is connected with the in-phase input end of described operational amplification circuit (2) by the output terminal of described current acquisition network (1), the output terminal of described reference voltage circuit (3) is connected with the in-phase input end of described operational amplification circuit (2), the output terminal of described operational amplification circuit (2) connects the ADC input end of described single-chip microcomputer (4), it is characterized in that, described operational amplification circuit (2) is by operational amplifier OP1, resistance R1, R2, R3, R4, R8, electric capacity C3, C4 forms, wherein said operational amplifier OP1 is powered by single supply+5V, described operational amplifier OP1 and described resistance R1, R2, R3, R4 form differential operational amplifying circuit, amplify and level moves process to input ac voltage signal, generating positive and negative voltage input is converted to positive voltage and exports, the output terminal of described operational amplifier OP1 is connected to inverting input by described resistance R3, and the inverting input of described operational amplifier OP1 is by described resistance R1 ground connection, the in-phase input end of described operational amplifier OP1 draws the input end of a terminal as described operational amplification circuit (2) by described resistance R2, and is connected to the output terminal of described current acquisition network (1), the in-phase input end of described operational amplifier OP1 draws the input end of a terminal as described operational amplification circuit (2) by described resistance R4, and is connected to the output terminal of described reference voltage circuit (3), described resistance R8 and described electric capacity C4 RC low-pass filter network in series, the output terminal of described operational amplifier OP1 is connected in one end of described resistance R8, other end ground connection, adjacent terminal of drawing between the two is as the output terminal of operational amplification circuit (2).
2. the AC current collecting circuit of a kind of ceramic machinery equipment use according to claim 1, is characterized in that, described current acquisition network (1) comprising: current transformer (CT1), precision resister (R
l) and filter capacitor (C1), wherein: the output terminal of described current transformer (CT1) is correspondingly connected to described precision resister (R
l) two ends, described precision resister (R
l) two ends be correspondingly connected to the two ends of described filter capacitor (C1), and described precision resister (R
l) output terminal as current acquisition network (1) is drawn in one end of being connected with described filter capacitor (C1), and other end ground connection.
3. the AC current collecting circuit of a kind of ceramic machinery equipment use according to claim 1, it is characterized in that, described reference voltage circuit (3) is made up of reference voltage circuit, bleeder circuit and voltage follower, wherein: described reference voltage circuit is connected to power supply+5V by resistance R5 and electric capacity C2 connection leading-out terminal, the other end ground connection of electric capacity C2, the other end of resistance R5 is connected with three-terminal shunt regulator U1 and exports the reference voltage of 2.5V, and leading-out terminal is as the output terminal of reference voltage circuit; Described bleeder circuit carries out dividing potential drop to reference voltage 2.5V, is composed in series by precision resister R6, R7, and its one end connects the output terminal of reference voltage 2.5V, other end ground connection, and resistance in series connecting place leading-out terminal is as the output terminal of bleeder circuit; Described voltage follower is connected to the output terminal of described bleeder circuit by the in-phase input end of operational amplifier OP2, inverting input is connected to its output terminal, and from the output terminal of the output terminal leading-out terminal of operational amplifier OP2 circuit (3) as the reference voltage.
4. the AC current collecting circuit of a kind of ceramic machinery equipment use according to claim 1, it is characterized in that, described single-chip microcomputer (4) adopts integrated circuit (IC) chip, it has the ADC module carried, the input port of the ADC module of described single-chip microcomputer (4) receives the output signal (Uo) from described operational amplification circuit (2), and carries out AD conversion to this output signal (Uo) and carry out logic analysis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520816987.4U CN205157636U (en) | 2015-10-20 | 2015-10-20 | Alternating current acquisition circuit that pottery mechanical equipment used |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520816987.4U CN205157636U (en) | 2015-10-20 | 2015-10-20 | Alternating current acquisition circuit that pottery mechanical equipment used |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205157636U true CN205157636U (en) | 2016-04-13 |
Family
ID=55693315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520816987.4U Withdrawn - After Issue CN205157636U (en) | 2015-10-20 | 2015-10-20 | Alternating current acquisition circuit that pottery mechanical equipment used |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205157636U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525267A (en) * | 2016-12-16 | 2017-03-22 | 山东金洲科瑞节能科技有限公司 | Bus type temperature measuring device |
| CN106647492A (en) * | 2016-12-20 | 2017-05-10 | 施耐德万高（天津）电气设备有限公司 | Alternating-current switching value signal acquisition circuit |
| WO2018072407A1 (en) * | 2016-10-18 | 2018-04-26 | 珠海格力电器股份有限公司 | Current detection circuit |
| CN111426873A (en) * | 2020-05-13 | 2020-07-17 | 南京海兴电网技术有限公司 | Electronic AC sensor sampling and metering circuit |
-
2015
- 2015-10-20 CN CN201520816987.4U patent/CN205157636U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018072407A1 (en) * | 2016-10-18 | 2018-04-26 | 珠海格力电器股份有限公司 | Current detection circuit |
| CN106525267A (en) * | 2016-12-16 | 2017-03-22 | 山东金洲科瑞节能科技有限公司 | Bus type temperature measuring device |
| CN106525267B (en) * | 2016-12-16 | 2023-08-01 | 山东金洲科瑞节能科技有限公司 | Bus type temperature measuring device |
| CN106647492A (en) * | 2016-12-20 | 2017-05-10 | 施耐德万高（天津）电气设备有限公司 | Alternating-current switching value signal acquisition circuit |
| CN111426873A (en) * | 2020-05-13 | 2020-07-17 | 南京海兴电网技术有限公司 | Electronic AC sensor sampling and metering circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105182061B (en) | A kind of AC current collecting circuit that ceramic machinery equipment uses | |
| CN205157636U (en) | Alternating current acquisition circuit that pottery mechanical equipment used | |
| CN210142143U (en) | High-precision current sampling circuit | |
| CN203688619U (en) | Isolation alternating current sampling circuit based on AMC 1200 | |
| CN203299279U (en) | Internal resistance monitoring system of electric vehicle power battery pack | |
| CN204116463U (en) | A kind of signal processing circuit measured for electromagnetic field intensity | |
| CN206497148U (en) | Isolated ac high voltage signal deteching circuit | |
| CN209070006U (en) | A kind of current sensor | |
| CN107132167A (en) | High precision two line system industrial dust detection means | |
| CN211720479U (en) | Signal conditioning circuit for transmitting electric quantity alternating current | |
| CN205317841U (en) | A keep apart current detection circuit for photovoltaic power generation | |
| CN103076480B (en) | Tiny signal collecting card | |
| CN202583316U (en) | Circuit for collecting positive and negative current by single power supply | |
| CN203519696U (en) | AC-DC voltage universal detecting circuit | |
| CN205049679U (en) | Residual current transformer sampling circuit | |
| CN204115881U (en) | A kind of electrical equipment temperature supervisory system | |
| CN203812008U (en) | Analog signal collector | |
| CN202189088U (en) | Alternating-current voltage isolating and measuring circuit based on combination of mutual inductor and operational amplifier | |
| CN206292304U (en) | Transformer station's electricity self-operated measuring unit | |
| CN110346731B (en) | Battery current detection circuit for communication | |
| CN205210164U (en) | Electric power system gathers signal conditioning module | |
| CN103954828A (en) | Voltage detection circuit and device based on single-phase PFC | |
| CN208477002U (en) | A kind of measurement protective device | |
| CN202994876U (en) | Micro-signal acquisition card | |
| CN204142832U (en) | A kind of current signal collection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160413 Effective date of abandoning: 20180925 |