CN109030931A - Current signal detecting device based on Arduino single-chip microcontroller - Google Patents
Current signal detecting device based on Arduino single-chip microcontroller Download PDFInfo
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- CN109030931A CN109030931A CN201810986211.5A CN201810986211A CN109030931A CN 109030931 A CN109030931 A CN 109030931A CN 201810986211 A CN201810986211 A CN 201810986211A CN 109030931 A CN109030931 A CN 109030931A
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- 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
Abstract
The invention discloses a kind of small signal Handheld detection device based on Arduino single-chip microcontroller, including multiple voltage signal processing modules.Load, self-control current sensor sensed current signal are pushed using OCL power amplification circuit, after overcurrent signal improves, sampled with the ADC module in chip, handle analysis and conversion display output.The present invention using Arduino single-chip microcontroller as main control chip, gained device to test the result shows that: when inputting sinusoidal signal frequency range is that 50Hz~100kHz and peak-to-peak value are more than certain voltage amplitude, flow through the current value of load resistance not less than a fixed value；Current measurement precision is better than 5%, and frequency measurement accuracy is better than 1%.Solve the problems, such as that existing current signal detecting device measurement accuracy is low, live effect is poor.
Description
Technical field
The present invention relates to a kind of detection device technical field, specifically a kind of current signal based on Arduino single-chip microcontroller
Detection device.
Background technique
By electromagnetic induction principle it is found that the conductor being placed in change magnetic flux can generate induced electromotive force (inducts electronic
Gesture).And if conductor is closed into primary Ioops, which can drive electronics to flow, formed induced current (induced current).Electricity
The discovery of magnetic induction phenomenon brings a great revolution to the industry in the world and technology.With the development electromagnetism sense of society
It should be in development of the extensive use in terms of electrician, electronic technology, electrification, automation to social productive forces and science and technology are pushed
It played an important role.So us can be helped preferably to utilize it faradic research and measurement.
Currently, the small signal supervisory instrument used at home, the shadow due to conductor current variation and the variation of ambient enviroment
It rings electric current constantly to change, to can not accomplish the accurate and real-time detection of small signal.
Summary of the invention
The purpose of the present invention is to provide a kind of current signal detecting devices based on Arduino single-chip microcontroller, on solving
State the problem of proposing in background technique.
It is a further object of the present invention to provide a kind of small signal detecting methods based on Arduino single-chip microcontroller, can pass through
The coil of coiling collects induced current, by Arduino monolithic machine testing and shows the amplitude and frequency of current signal.
To achieve the above object, the invention provides the following technical scheme:
A kind of current signal detecting device based on Arduino single-chip microcontroller, including TDA power amplification circuit, inductance mutual inductance
Device, voltage amplifier circuit, virtual value conversion circuit, rectification circuit and Arduino single-chip microcontroller, the TDA power amplification circuit
Input terminal is electrically connected with the output end of the waveform generator of external disposable type, the output end of TDA power amplification circuit and one
One end of fixed load resistance is electrically connected, and the both ends of load resistance both ends with an external oscillograph respectively；It bears simultaneously
Distinguish the both ends of external multimeter in the both ends for carrying resistance；It is covered on conducting wire between the TDA power amplification circuit and load resistance
Equipped with current transformer；The output end of current transformer is electrically connected with the input terminal of voltage amplifier circuit, and current transformer will be received
In the low current signal input voltage amplifying circuit collected, voltage amplifier circuit is electric with rectification circuit and virtual value conversion simultaneously
The input terminal on road is electrically connected.
As a further solution of the present invention: small to one using power amplifier chip in the TDA power amplification circuit
Signal carries out power amplification, and power amplifier chip is specially audio power amplifier circuit TDA2030 chip, the same phase of power amplifier chip
Input terminal is electrically connected by capacitor C4 with the anode of external waveform generator, and the cathode of waveform generator passes through wired earth, function
It puts the non-inverting input terminal of circuit chip while passing through resistance R1 and be grounded, the negative electricity source and outside 5V power supply of power amplifier chip
Electrical connection, while being grounded by capacitor C1 and C5, the reverse input end of power amplifier chip is electrically connected with one end of resistance R2, electricity
Resistance R2 the other end be electrically connected respectively with one end of capacitor C2, C6 and C7, the other end of capacitor C2, C6 and C7 with external 16V
Power electric connection, and the other end of capacitor C2, C6 and C7 are electrically connected by capacitor C3 with one end of resistance R4, resistance R4's is another
End be electrically connected with the anode of the output end of power amplifier chip and ammeter simultaneously, the anode of ammeter and meanwhile with power amplifier core
The output end of piece is electrically connected, and cathode and the oscillograph electrical connection of ammeter, the one end of the cathode of ammeter also with resistance R5 is electrically connected
It connects, the other end and 16V power electric connection of resistance R5；The reverse input end of the power amplifier chip simultaneously with resistance R3 one
End electrical connection, the other end of resistance R3 are electrically connected with the anode of diode D1, cathode and the power amplifier chip of diode D1
The anode of the electrical connection of negative electricity source, diode D1 is electrically connected with the cathode of diode D2 simultaneously, the anode and function of diode D2
Put the cathode power supply end electrical connection of circuit chip.
The scheme further walked as the present invention: current transformer coil as made of polyester enamel covered wire coiling.
The scheme further walked as the present invention: including the first chip LM324N, the first chip in the voltage amplifier circuit
The non-inverting input terminal of LM324N is electrically connected with one end of resistance R11, the other end ground connection of resistance R11, the first chip LM324N's
Inverting input terminal is electrically connected with one end of resistance R41 and electronics R21, the other end and inductance mutual inductor of resistance R41 and electronics R21
2 output end electrical connection, the input with rectification circuit 5 and virtual value conversion circuit 4 respectively of the output end of the first chip LM324N
End electrical connection, the output of the first chip LM324N pass through resistance R31 electricity all between the inverting input terminal of the first chip LM324N
Connection, the cathode power supply end of the first chip LM324N and outside 16V power electric connection, the negative electricity source of the first chip LM324N
With external -16V power electric connection.
The scheme further walked as the present invention: the rectification circuit includes the second chip LM324N, the second chip LM324N
Non-inverting input terminal ground connection, the inverting input terminal of the second chip LM324N is electrically connected with one end of resistance R12, and resistance R12's is another
One end is electrically connected with the output end of voltage amplifier circuit 3, and one end of the output end and resistance R42 of the second chip LM324N is electrically connected
It connects, the other end of resistance R42 is electrically connected with one end of the input terminal of Arduino single-chip microcontroller 6 and resistance R32 respectively, resistance R32's
The other end is electrically connected while ground connection with the input terminal of semiconductor D12, the other end and the Arduino single-chip microcontroller of semiconductor D12
Input terminal electrical connection.
The scheme further walked as the present invention: the virtual value conversion circuit includes AD637 chip, and the 1 of AD637 chip is drawn
Foot and 3 pins are grounded, and 4 pins of AD637 chip are electrically connected with one end of resistance R13, and the other end of resistance R13 and sliding become
The binding post electrical connection of device R23 is hindered, the both ends of slide rheostat R23 are electrically connected with the anode and cathode of external power supply respectively,
6 pins of AD637 chip are electrically connected with one end of slide rheostat R33, and the other end and binding post of slide rheostat R33 is simultaneously
Be electrically connected with one end of 8 pins of AD637 chip and capacitor C13, the other end of capacitor C13 simultaneously with Arduino single-chip microcontroller 6
The electrical connection of 9 pins of input terminal and AD637 chip, 13 pins of AD637 chip are electrically connected with one end of resistance R43, resistance R43
The other end be electrically connected with the output end of voltage amplifier circuit.
Compared with prior art, the beneficial effects of the present invention are: the present invention provides a set of based on small-signal amplitude and
The hand-held detection system of frequency solves the problems, such as that existing current signal detection accuracy is low, real-time is poor and very square
Just；The present apparatus is by modules rational deployment, and induced current amplification that coil is collected into is using virtual value conversion and whole
The processing such as stream maximizes the effect for improving measurement and reduces the use of ground modular circuit in conjunction with software, presents a kind of reasonable
Mentality of designing achieves good effect.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the current signal detecting device based on Arduino single-chip microcontroller.
Fig. 2 is the power amplifier modular circuit figure of the current signal detecting device based on Arduino single-chip microcontroller.
Fig. 3 is the rectification module circuit diagram of the current signal detecting device based on Arduino single-chip microcontroller.
Fig. 4 is the voltage amplification module circuit diagram of the current signal detecting device based on Arduino single-chip microcontroller.
Fig. 5 is the virtual value conversion module circuit diagram of the current signal detecting device based on Arduino single-chip microcontroller.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Please refer to Fig. 1~5, in the embodiment of the present invention, a kind of current signal detecting device based on Arduino single-chip microcontroller,
Including TDA power amplification circuit, inductance mutual inductor, voltage amplifier circuit, virtual value conversion circuit, rectification circuit and Arduino
Single-chip microcontroller, the input terminal of the TDA power amplification circuit are electrically connected with the output end of the waveform generator of external disposable type,
The output end of TDA power amplification circuit is electrically connected with one end of a fixed load resistance, and the both ends difference of load resistance
It sees whether to be distorted by external oscillograph detection load both end voltage waveform with the both ends of an external oscillograph；Simultaneously
The both ends of external multimeter are distinguished at the both ends of load resistance, by multimeter detection load current, guarantee its with input signal at
Linear relationship, and output waveform is undistorted in a certain range；
Power amplification, power amplifier electricity are carried out to one small signal using power amplifier chip in the TDA power amplification circuit
Road chip is specially audio power amplifier circuit TDA2030 chip, the non-inverting input terminal of power amplifier chip by capacitor C4 with it is external
The anode electrical connection of waveform generator, the cathode of waveform generator pass through wired earth, the non-inverting input terminal of power amplifier chip
It is grounded simultaneously by resistance R1, the negative electricity source and outside 5V power electric connection of power amplifier chip, while passing through capacitor C1
Be grounded with C5, the reverse input end of power amplifier chip is electrically connected with one end of resistance R2, the other end of resistance R2 respectively with electricity
Hold C2, C6 and C7 one end electrical connection, the other end of capacitor C2, C6 and C7 with external 16V power electric connection, and capacitor C2,
The other end of C6 and C7 is electrically connected by capacitor C3 with one end of resistance R4, the other end of resistance R4 and meanwhile with power amplifier chip
Output end and ammeter anode electrical connection, the anode of ammeter be electrically connected with the output end of power amplifier chip simultaneously, electric
The cathode and oscillograph of flow table are electrically connected, and the cathode of ammeter is also electrically connected with one end of resistance R5, the other end of resistance R5 with
16V power electric connection；The reverse input end of the power amplifier chip is electrically connected with one end of resistance R3 simultaneously, and resistance R3's is another
One end is electrically connected with the anode of diode D1, and the cathode of diode D1 is electrically connected with the negative electricity source of power amplifier chip, and two
The anode of pole pipe D1 is electrically connected with the cathode of diode D2 simultaneously, the cathode power supply of the anode and power amplifier chip of diode D2
End electrical connection；
Current transformer, current transformer are arranged on conducting wire between the TDA power amplification circuit and load resistance
The coil as made of polyester enamel covered wire coiling makes in the electric current and current transformer in TDA power amplification circuit circuit
The induced current of generation is linear, avoids to measure current value mistake due to loop current, which changes, causes coil impedance to change
Very；The output end of current transformer is electrically connected with the input terminal of voltage amplifier circuit, the faint electricity that current transformer will be collected into
It flows in signal input voltage amplifying circuit, can preferably detect sensor current signal, voltage amplifier circuit while and rectification circuit
It is electrically connected with the input terminal of virtual value conversion circuit；
It include the first chip LM324N, the non-inverting input terminal and resistance of the first chip LM324N in the voltage amplifier circuit
One end of R11 is electrically connected, the other end ground connection of resistance R11, the inverting input terminal and resistance R41 and electronics of the first chip LM324N
One end of R21 is electrically connected, and the other end of resistance R41 and electronics R21 are electrically connected with the output end of inductance mutual inductor 2, the first chip
The output end of LM324N is electrically connected with the input terminal of rectification circuit 5 and virtual value conversion circuit 4 respectively, the first chip LM324N's
Output is all electrically connected between the inverting input terminal of the first chip LM324N by resistance R31, the anode of the first chip LM324N
Power end and outside 16V power electric connection, the negative electricity source of the first chip LM324N and external -16V power electric connection；
The rectification circuit includes that the non-inverting input terminal of the second chip LM324N, the second chip LM324N is grounded, the second core
The inverting input terminal of piece LM324N is electrically connected with one end of resistance R12, and the other end of resistance R12 is defeated with voltage amplifier circuit 3
Outlet electrical connection, the output end of the second chip LM324N is electrically connected with one end of resistance R42, the other end of resistance R42 respectively with
One end of the input terminal of Arduino single-chip microcontroller 6 and resistance R32 electrical connection, while the other end ground connection of resistance R32 and semiconductor
The input terminal of D12 is electrically connected, and the other end of semiconductor D12 is electrically connected with the input terminal of Arduino single-chip microcontroller；
The virtual value conversion circuit includes AD637 chip, and 1 pin and 3 pins of AD637 chip are grounded, AD637 core
4 pins of piece are electrically connected with one end of resistance R13, and the other end of resistance R13 is electrically connected with the binding post of slide rheostat R23,
The both ends of slide rheostat R23 are electrically connected with the anode and cathode of external power supply respectively, and 6 pins of AD637 chip and sliding become
Hinder one end electrical connection of device R33, the other end and binding post of slide rheostat R33 while 8 pins and capacitor with AD637 chip
One end of C13 is electrically connected, the other end of capacitor C13 simultaneously with the input terminal of Arduino single-chip microcontroller 6 and 9 pins of AD637 chip
Electrical connection, 13 pins of AD637 chip are electrically connected with one end of resistance R43, the other end of resistance R43 and voltage amplifier circuit
Output end electrical connection.
The working principle of the invention is: when using the present invention, it is broadly divided into following steps:
Step 1, it first has to give all circuit boards welded common source altogether, in addition to rectification circuit is single supply power supply,
His three circuits are all dual power supplies, and are all made of positive and negative 16V AC power source；
Step 2, then by external waveform generator to power amplifier input a waveform frequency range 50Hz~
Signal in 100kHz, and obtain output end in power amplifier and access a fixed load resistance.Whether check load voltage waveform
The relationship of distortion and load current and input amplitude；
Step 3, Current Transformer 2 is then passed through into power amplifier output loop, then the output of coil is connected to voltage amplification
The input terminal of circuit；
Step 4, then by the output of amplifying circuit it is divided into two-way, amplification circuit output end is respectively connected to virtual value conversion circuit
And the input terminal of rectification circuit the output end of the two is respectively connected to the input terminal of Arduino single-chip microcontroller, carry out respectively
The sampling of amplitude and frequency；
By the above-mentioned means, being achieved that the small signal supervisory instrument based on Arduino single-chip microcontroller, a set of base is provided
In the detection system of the faint sensor current signal of Arduino single-chip microcontroller, solves existing current detecting equipment measurement data essence
The problem that exactness is low and real-time is poor, and this is handheld apparatus, it is very convenient；The present invention is using the signal source in laboratory just
Negative 16V dual power supply, Arduino single-chip microcontroller need 5V voltage, can also be provided by 5V voltage regulator circuit；This safe and stable arrangement
Again easily, the detection suitable for random waveform of any occasion lower frequency range within 50Hz~100kHz.
Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art,
It is still possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is carried out etc.
With replacement, all within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in this
Within the protection scope of invention.
Claims (6)
1. a kind of current signal detecting device based on Arduino single-chip microcontroller, including TDA power amplification circuit, inductance mutual inductor,
Voltage amplifier circuit, virtual value conversion circuit, rectification circuit and Arduino single-chip microcontroller, which is characterized in that the TDA power is put
The input terminal of big circuit is electrically connected with the output end of the waveform generator of external disposable type, the output of TDA power amplification circuit
End be electrically connected with one end of a fixed load resistance, and the both ends of load resistance respectively with an external oscillograph two
End；The both ends of external multimeter are distinguished at the both ends of load resistance simultaneously；Between the TDA power amplification circuit and load resistance
Current transformer is arranged on conducting wire；The output end of current transformer is electrically connected with the input terminal of voltage amplifier circuit, and electric current is mutual
Sensor by the low current signal input voltage amplifying circuit being collected into, voltage amplifier circuit simultaneously with rectification circuit and effective
It is worth the input terminal electrical connection of conversion circuit.
2. the current signal detecting device according to claim 1 based on Arduino single-chip microcontroller, which is characterized in that described
Power amplification is carried out to one small signal using power amplifier chip in TDA power amplification circuit, power amplifier chip is specially
The non-inverting input terminal of audio power amplifier circuit TDA2030 chip, power amplifier chip passes through capacitor C4 and external waveform generator
Anode electrical connection, for the cathode of waveform generator by wired earth, the non-inverting input terminal of power amplifier chip passes through resistance simultaneously
R1 ground connection, the negative electricity source and outside 5V power electric connection of power amplifier chip, while being grounded by capacitor C1 and C5, power amplifier
The reverse input end of circuit chip is electrically connected with one end of resistance R2, the other end of resistance R2 respectively with capacitor C2, C6 and C7
One end electrical connection, the other end of capacitor C2, C6 and C7 with external 16V power electric connection, and the other end of capacitor C2, C6 and C7
It is electrically connected by capacitor C3 with one end of resistance R4, the other end of resistance R4 while output end and electric current with power amplifier chip
Table anode electrical connection, ammeter anode simultaneously be electrically connected with the output end of power amplifier chip, the cathode of ammeter with show
The electrical connection of wave device, the cathode of ammeter are also electrically connected with one end of resistance R5, the other end and 16V power electric connection of resistance R5；
The reverse input end of the power amplifier chip is electrically connected with one end of resistance R3 simultaneously, the other end and diode D1 of resistance R3
Anode electrical connection, the cathode of diode D1 be electrically connected with the negative electricity source of power amplifier chip, diode D1 it is positive together
When be electrically connected with the cathode of diode D2, diode D2 anode be electrically connected with the cathode power supply end of power amplifier chip.
3. the current signal detecting device according to claim 1 based on Arduino single-chip microcontroller, which is characterized in that described
Current transformer coil as made of polyester enamel covered wire coiling.
4. the current signal detecting device according to claim 1 based on Arduino single-chip microcontroller, which is characterized in that described
One end electricity of non-inverting input terminal and resistance R11 in voltage amplifier circuit including the first chip LM324N, the first chip LM324N
Connection, the other end ground connection of resistance R11, the inverting input terminal of the first chip LM324N and one end electricity of resistance R41 and electronics R21
The other end of connection, resistance R41 and electronics R21 are electrically connected with the output end of inductance mutual inductor 2, the output of the first chip LM324N
End is electrically connected with the input terminal of rectification circuit 5 and virtual value conversion circuit 4 respectively, and the output of the first chip LM324N is all with first
It is electrically connected between the inverting input terminal of chip LM324N by resistance R31, the cathode power supply end and outside of the first chip LM324N
16V power electric connection, the negative electricity source of the first chip LM324N and external -16V power electric connection.
5. the current signal detecting device according to claim 1 based on Arduino single-chip microcontroller, which is characterized in that described
Rectification circuit includes that the non-inverting input terminal of the second chip LM324N, the second chip LM324N is grounded, and the second chip LM324N's is anti-
Phase input terminal is electrically connected with one end of resistance R12, and the other end of resistance R12 is electrically connected with the output end of voltage amplifier circuit 3, the
The output end of two chip LM324N is electrically connected with one end of resistance R42, the other end of resistance R42 respectively with Arduino single-chip microcontroller 6
Input terminal and resistance R32 one end electrical connection, while the other end ground connection of resistance R32 with the input terminal of semiconductor D12 electricity
Connection, the other end of semiconductor D12 are electrically connected with the input terminal of Arduino single-chip microcontroller.
6. the current signal detecting device according to claim 1 based on Arduino single-chip microcontroller, which is characterized in that described
Virtual value conversion circuit includes AD637 chip, and 1 pin and 3 pins of AD637 chip are grounded, 4 pins of AD637 chip with
One end of resistance R13 is electrically connected, and the other end of resistance R13 is electrically connected with the binding post of slide rheostat R23, slide rheostat
The both ends of R23 are electrically connected with the anode and cathode of external power supply respectively, 6 pins of AD637 chip and the one of slide rheostat R33
End electrical connection, the other end and binding post of slide rheostat R33 are electric with one end of 8 pins of AD637 chip and capacitor C13 simultaneously
The other end of connection, capacitor C13 is electrically connected with 9 pins of the input terminal of Arduino single-chip microcontroller 6 and AD637 chip simultaneously,
13 pins of AD637 chip are electrically connected with one end of resistance R43, the other end of resistance R43 and the output end of voltage amplifier circuit
Electrical connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810986211.5A CN109030931A (en) | 2018-08-22 | 2018-08-22 | Current signal detecting device based on Arduino single-chip microcontroller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810986211.5A CN109030931A (en) | 2018-08-22 | 2018-08-22 | Current signal detecting device based on Arduino single-chip microcontroller |
Publications (1)
| Publication Number | Publication Date |
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| CN109030931A true CN109030931A (en) | 2018-12-18 |
Family
ID=64625576
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810986211.5A Pending CN109030931A (en) | 2018-08-22 | 2018-08-22 | Current signal detecting device based on Arduino single-chip microcontroller |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112147402A (en) * | 2019-06-28 | 2020-12-29 | 华东师范大学 | Non-contact current signal detection device and detection method based on stm32 |
| CN113671229A (en) * | 2020-05-13 | 2021-11-19 | 杨夏瑞 | A multi-functional universal meter for physical teaching |
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| CN113671229A (en) * | 2020-05-13 | 2021-11-19 | 杨夏瑞 | A multi-functional universal meter for physical teaching |
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Application publication date: 20181218 |