CN105891589B - A kind of zero cross detection circuit and preparation method thereof for power line - Google Patents
A kind of zero cross detection circuit and preparation method thereof for power line Download PDFInfo
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- CN105891589B CN105891589B CN201610362033.XA CN201610362033A CN105891589B CN 105891589 B CN105891589 B CN 105891589B CN 201610362033 A CN201610362033 A CN 201610362033A CN 105891589 B CN105891589 B CN 105891589B
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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
- G01R19/175—Indicating the instants of passage of current or voltage through a given value, e.g. passage through zero
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Abstract
The invention discloses a kind of zero cross detection circuits for power line, the zero cross detection circuit has output end and input terminal, the input terminal is electrically connected with power line L and power line N, it includes reference voltage module (1), capacitor C1, capacitor C2, resistance R1, resistance R2, capacitor CL, capacitor CN and pcb board (2)；The reference voltage module (1), capacitor C1, capacitor C2, resistance R1, resistance R2, capacitor CL and capacitor CN are located on pcb board (2), it is an advantage of the invention that the zero cross detection circuit, circuit structure is simple, at low cost.
Description
Technical field
The zero cross detection circuit and preparation method thereof that the present invention relates to a kind of for power line.
Background technique
Power-line carrier communication is a kind of power supply line by alternating current to carry out the technology of data communication, the technology
It is carried to modulate data on a typically greater than sine wave of tens of KHzs or more different from mains frequency (50Hz or 60Hz)
On wave.In order to reach preferable communication efficiency in power-line carrier communication system, need to detect alternating current zero crossing.But it is existing
Alternating current zero cross detection circuit or excessively complicated or had for its precision by the variation of component parameters and line voltage biggish
It influences, in order to overcome above-mentioned situation, 203759106 U of Authorization Notice No. CN discloses a kind of alternating current zero cross detection circuit, the city
Electric zero cross detection circuit includes that the pulse for accelerating discharge process when line voltage is from positive half cycle to zero crossing generates control mould
Block and optocoupler, wherein it includes resistance R1, resistance R2, capacitor C1 that pulse, which generates control module, the triode Q1 of NPN type,
Triode Q2, resistance R3 and the diode D1 of NPN type, although circuit structure has accomplished a degree of simplification, by
In needing to use multiple triodes and light misfortune device, cause the cost of entire circuit relatively high.
Summary of the invention
The technical problem to be solved by the present invention is to provide a kind of zero cross detection circuit for power line, the zero passage detection
Circuit, circuit structure is simple, at low cost.
In order to solve the above technical problems, technical solution provided by the invention are as follows: a kind of zero passage detection electricity for power line
Road, the zero cross detection circuit have output end and input terminal, and the input terminal is electrically connected with power line L and power line N, it is wrapped
Include reference voltage module, capacitive reactive element C1, capacitive reactive element C2, impedor Z1, impedor Z2, capacitor CL, capacitor CN and PCB
Plate；The reference voltage module, capacitive reactive element C1, capacitive reactive element C2, impedor Z1, impedor Z2, capacitor CL are with capacitor
CN is located on pcb board, and one end of the capacitor CL is electrically connected with power line L, and the other end is electrically connected with one end of impedor Z1；
The other end of the impedor Z1 is electrically connected with the anode of capacitive reactive element C1, the cathode ground connection of the capacitive reactive element C1, described
One end of capacitor CN is electrically connected with power line N, and the other end of the capacitor CN is electrically connected with one end of impedor Z2, the resistance
The other end of anti-element Z2 is electrically connected with the anode of capacitive reactive element C2, the cathode ground connection of the capacitive reactive element C2, the capacitive reactance member
The anode of part C1 is electrically connected with an output end of the input terminal of reference voltage module and zero cross detection circuit, the capacitive reactive element
The anode of C2 is electrically connected with another output end of the output end of reference voltage module and zero cross detection circuit.
As a preference, the reference voltage module include reference voltage VCC, resistance R3, resistance R4, resistance R5 and
Resistance R6；One end of the resistance R3 is electrically connected with the anode of capacitive reactive element C1, and the other end is electrically connected with one end of resistance R4, institute
The other end for stating resistance R4 is electrically connected with the anode of capacitive reactive element C2, and one end of the resistance R5 is electrically connected with reference voltage VCC,
The other end is electrically connected with one end of resistance R6, the other end ground connection of resistance R6, the connecting node and resistance of resistance R3 and resistance R4
R5 is electrically connected with the connecting node of resistance R6.
As a preference, the capacitor CN and capacitor the CL capacitor between plate.
As a preference, capacitor includes the substrate layer and the upper table for being located at substrate layer that pcb board is medium between the plate
The conducting block in face and lower surface.
As a preference, the conducting block be copper at and be in round pie conducting block.
As a preference, the surface area a of the conducting block of capacitor CN is equal to the capacitance of capacitor CN and the thickness of pcb board between plate
The product of degree divided by the dielectric constant of free space and the relative dielectric constant of pcb board material product；The conduction of capacitor CL between plate
The surface area a of block equal to capacitor CL capacitance and pcb board thickness product divided by free space dielectric constant and pcb board
The product of the relative dielectric constant of material.
After structure more than, compared with prior art, the present invention having the advantage that it mainly includes reference voltage
Module and capacitive reactive element C1, capacitive reactive element C2, impedor Z1, impedor Z2, capacitor CL, capacitor CN and pcb board etc. are first
Device；Reference voltage module, capacitive reactive element C1, capacitive reactive element C2, impedor Z1, impedor Z2, capacitor CL and capacitor
CN is located on pcb board, and one end of capacitor CL is electrically connected with power line L, and the other end is electrically connected with one end of impedor Z1；Impedance
The other end of element Z1 is electrically connected with the anode of capacitive reactive element C1, the cathode ground connection of capacitive reactive element C1, one end of capacitor CN and electricity
Line of force N electrical connection, the other end of capacitor CN are electrically connected with one end of impedor Z2, the other end of impedor Z2 and capacitive reactance member
The anode electrical connection of part C2, the cathode ground connection of capacitive reactive element C2, the anode and the input terminal of reference voltage module of capacitive reactive element C1
And the output end electrical connection of zero cross detection circuit, the anode and the output end and mistake of reference voltage module of capacitive reactive element C2
Another output end of zero detection circuit is electrically connected.The zero cross detection circuit of above structure, circuit structure on the whole is simple, secondly
The most most common resistance in practical applications and capacitor this kind component are only used, this kind of component is at low cost, secondly,
The performance of this kind of component is stablized, so that the low cost of entire circuit, enables entire circuit steadily to run.
Wherein, the reference voltage mould formed using reference voltage VCC, resistance R3, resistance R4, resistance R5 and resistance R6
Block, causes at low cost, is only to use some conventional components, and performance is stablized, it is ensured that reference voltage module can be long-term
Effectively run.
Wherein, using pcb board as the substrate layer of medium and the conducting block institute structure for the upper and lower surfaces for being located at substrate layer
At plate between capacitor, have it is at low cost, it is high pressure resistant, be not easy to puncture, it is highly-safe, be suitable for forceful electric power environment.
Meanwhile it will be located at the conducting block of the upper and lower surfaces of substrate layer, and it is made into round pie structure made of copper, it is convenient
The size for obtaining the surface area a of conducting block, can be calculated the capacitance of capacitor between plate by the size of surface area a.
The technical problem to be solved by the present invention is to, a kind of production method of zero cross detection circuit for power line is provided,
Stable using zero cross detection circuit made of the production method, circuit structure is simple, causes low.
In order to solve the above technical problems, technical solution provided by the invention are as follows: a kind of zero passage detection electricity for power line
The production method on road,
Step 1: prepare reference voltage module, capacitive reactive element C1, capacitive reactive element C2, impedor Z1, impedor Z2,
Capacitor CL, capacitor CN, pcb board, reference voltage VCC, resistance R3, resistance R4, resistance R5, resistance R6 and four pieces of round pie coppers
At conducting block, wherein the surface area a of two pieces of conducting blocks equal to capacitor CL capacitance and pcb board thickness product divided by
The surface area a of the product of the relative dielectric constant of the dielectric constant and pcb board material of free space, remaining two pieces of conducting blocks is equal to electricity
Hold the product of the capacitance of CN and the thickness of pcb board divided by the dielectric constant of free space and the relative dielectric constant of pcb board material
Product；
Step 2: two regions being spaced apart will be delimited on pcb board, welded in the upper and lower surfaces in the region
Upper conducting block；
Step 3: where conducting block is electrically connected with power line L, the conducting block immediately below the conducting block and impedor Z1
One end electrical connection, the other end of impedor Z1 is electrically connected with the anode of capacitive reactive element C1, and the cathode of capacitive reactive element C1 is grounded；
Another conducting block is electrically connected with power line N, and the conducting block immediately below the conducting block is electrically connected with one end of impedor Z2, impedance
The other end of element Z2 is electrically connected with the anode of capacitive reactive element C2, the cathode ground connection of capacitive reactive element C2, the anode of capacitive reactive element C1
It is electrically connected with an output end of zero detection circuit, another output end of the anode and zero cross detection circuit of capacitive reactive element C2 is electrically connected
It connects；The anode of capacitive reactive element C1 is electrically connected with one end of resistance R3, and the other end of resistance R3 is electrically connected with one end of resistance R4, electricity
The other end for hindering R4 is electrically connected with the anode of capacitive reactive element C2, and one end of resistance R5 is electrically connected with reference voltage VCC, resistance R5's
The other end is electrically connected with one end of resistance R6, the other end ground connection of resistance R6, the connecting node and resistance of resistance R3 and resistance R4
R5 is electrically connected with the connecting node of resistance R6.
After method more than, compared with prior art, the present invention having the advantage that the area Liang Ge by pcb board
The upper and lower surface in domain welds upper conducting block, and capacitor constitutes capacitor CL and capacitor CN between constituting two plates, so that above-mentioned zero passage is examined
Slowdown monitoring circuit be suitable for forceful electric power environment, while between plate capacitor have it is at low cost, it is high pressure resistant, be not easy to puncture, it is highly-safe, in the circuit
In addition and the most conventional component, i.e. resistance and capacitor are applied, the circuit structure of entire circuit is simple, causes low, energy
Enough stable operation.
Detailed description of the invention
Fig. 1 is circuit diagram of the invention.
Fig. 2 is the structure chart of capacitor between plate.
It is as shown in the figure: 1, reference voltage module, 2, pcb board, 3, conducting block.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings.
As shown in Figure 1 and Figure 2, a kind of zero cross detection circuit for power line of the present invention, the zero passage detection electricity
Road has output end and input terminal, and the input terminal is electrically connected with power line L and power line N, it include reference voltage module 1,
Capacitive reactive element C1, capacitive reactive element C2, impedor Z1, impedor Z2, capacitor CL, capacitor CN and pcb board 2；The benchmark electricity
Die block 1, capacitive reactive element C1, capacitive reactive element C2, impedor Z1, impedor Z2, capacitor CL and capacitor CN are located at pcb board
On 2, one end of the capacitor CL is electrically connected with power line L, and the other end is electrically connected with one end of impedor Z1；The impedance element
The other end of part Z1 is electrically connected with the anode of capacitive reactive element C1, the cathode ground connection of the capacitive reactive element C1, and the one of the capacitor CN
End is electrically connected with power line N, and the other end of the capacitor CN is electrically connected with one end of impedor Z2, the impedor Z2's
The other end is electrically connected with the anode of capacitive reactive element C2, the cathode ground connection of the capacitive reactive element C2, the anode of the capacitive reactive element C1
It is electrically connected with an output end of the input terminal of reference voltage module 1 and zero cross detection circuit, the anode of the capacitive reactive element C2
It is electrically connected with another output end of the output end of reference voltage module 1 and zero cross detection circuit.
Wherein, impedor Z1 is resistance R1, and impedor Z2 is resistance R2, and capacitive reactive element C1 is capacitor C1, capacitive reactance member
Part C2 is capacitor C2.
The reference voltage module 1 includes reference voltage VCC, resistance R3, resistance R4, resistance R5 and resistance R6；It is described
One end of resistance R3 is electrically connected with the anode of capacitive reactive element C1, and the other end is electrically connected with one end of resistance R4, the resistance R4's
The other end is electrically connected with the anode of capacitive reactive element C2, and one end of the resistance R5 is electrically connected with reference voltage VCC, the other end and electricity
Hinder one end electrical connection of R6, the other end ground connection of resistance R6, the connecting node and resistance R5 and resistance R6 of resistance R3 and resistance R4
Connecting node electrical connection.
The capacitor CN and capacitor the CL capacitor between plate.
Capacitor includes the substrate layer and the upper and lower surfaces for being located at substrate layer that pcb board 2 is medium between the plate
Conducting block.
The conducting block be copper at and be in round pie conducting block 3.
Capacitance of the surface area a of the conducting block 3 of capacitor CN equal to capacitor CN and the product of the thickness of pcb board 2 are removed between plate
With the product of the dielectric constant of free space and the relative dielectric constant of pcb board material；The surface area of the conducting block 3 of capacitor CL between plate
A is opposite with pcb board material divided by the dielectric constant of free space with the product of the thickness of pcb board 2 equal to the capacitance of capacitor CL
The product of dielectric constant.
The working principle of the invention is analyzed as follows: as shown in Fig. 1, the voltage condition U of capacitor CL in circuitCL=Acos
(wt), the voltage condition at the end circuit output pThe voltage condition of capacitor CL in circuit
UCNThe voltage condition at the end=Acos (- wt), circuit output pWherein C1=C2, CCL
=CCN,Work as UP-UN=0 judges that carrier wave is in zero point, has reached zero passage detection
Purpose.
A kind of production method of the zero cross detection circuit for power line of the present invention, it includes the following steps,
Step 1: prepare reference voltage module 1, capacitive reactive element C1, capacitive reactive element C2, impedor Z1, impedor Z2,
Capacitor CL, capacitor CN, pcb board 2, reference voltage VCC, resistance R3, resistance R4, resistance R5, resistance R6 and four blocks of round pie copper
Manufactured conducting block 3, wherein the product of the thickness of capacitance of the surface area a of two pieces of conducting blocks 3 equal to capacitor CL and pcb board 2
Divided by the product of the relative dielectric constant of the dielectric constant and pcb board material of free space, the surface area a of remaining two pieces of conducting blocks 3
The product of the thickness of capacitance and pcb board 2 equal to capacitor CN is situated between divided by the dielectric constant of free space and the opposite of pcb board material
The product of electric constant；
Step 2: two regions being spaced apart will be delimited on pcb board 2, welded in the upper and lower surfaces in the region
Connect conducting block 3；
Step 3: where conducting block 3 is electrically connected with power line L, the conducting block 3 and impedor immediately below the conducting block 3
One end of Z1 is electrically connected, and the other end of impedor Z1 is electrically connected with the anode of capacitive reactive element C1, and the cathode of capacitive reactive element C1 connects
Ground；Another conducting block 3 is electrically connected with power line N, and the conducting block 3 and one end of impedor Z2 immediately below the conducting block 3 are electrically connected
It connects, the other end of impedor Z2 is electrically connected with the anode of capacitive reactive element C2, the cathode ground connection of capacitive reactive element C2, capacitive reactive element C1
Anode be electrically connected with an output end of zero detection circuit, another output end of the positive and zero cross detection circuit of capacitive reactive element C2
Electrical connection；The anode of capacitive reactive element C1 is electrically connected with one end of resistance R3, and one end of the other end and resistance R4 of resistance R3 is electrically connected
It connects, the other end of resistance R4 is electrically connected with the anode of capacitive reactive element C2, and one end of resistance R5 is electrically connected with reference voltage VCC, electricity
The other end of resistance R5 is electrically connected with one end of resistance R6, the other end ground connection of resistance R6, the connecting node of resistance R3 and resistance R4
It is electrically connected with resistance R5 with the connecting node of resistance R6.
Only highly preferred embodiment of the present invention is described above, but is not to be construed as limiting the scope of the invention.This
Invention is not limited only to above embodiments, and various changes made within the protection scope of the independent claims of the invention are at this
In the protection scope of invention.
Claims (6)
1. a kind of zero cross detection circuit for power line, the zero cross detection circuit has output end and input terminal, described defeated
Enter end to be electrically connected with power line L and power line N, it is characterised in that: it includes reference voltage module (1), capacitive reactive element C1, capacitive reactance
Element C2, impedor Z1, impedor Z2, capacitor CL, capacitor CN and pcb board (2)；The reference voltage module (1), capacitive reactance
Element C1, capacitive reactive element C2, impedor Z1, impedor Z2, capacitor CL and capacitor CN are located on pcb board (2), the electricity
The one end for holding CL is electrically connected with power line L, and the other end is electrically connected with one end of impedor Z1；The impedor Z1's is another
It holds and is electrically connected with the anode of capacitive reactive element C1, the cathode ground connection of the capacitive reactive element C1, one end and the power line N of the capacitor CN
Electrical connection, the other end of the capacitor CN are electrically connected with one end of impedor Z2, the other end and appearance of the impedor Z2
The anode electrical connection of anti-element C2, the cathode ground connection of the capacitive reactive element C2, the anode and reference voltage of the capacitive reactive element C1
The output end electrical connection of the input terminal and zero cross detection circuit of module (1), anode and the benchmark electricity of the capacitive reactive element C2
Another output end electrical connection of the output end and zero cross detection circuit of die block (1), the reference voltage module (1) includes base
Quasi- voltage VCC, resistance R3, resistance R4, resistance R5 and resistance R6；One end of the resistance R3 and the anode electricity of capacitive reactive element C1
Connection, the other end are electrically connected with one end of resistance R4, and the other end of the resistance R4 is electrically connected with the anode of capacitive reactive element C2, institute
The one end for stating resistance R5 is electrically connected with reference voltage VCC, and the other end is electrically connected with one end of resistance R6, another termination of resistance R6
Ground, resistance R3 are electrically connected with the connecting node of resistance R4 with resistance R5 with the connecting node of resistance R6.
2. a kind of zero cross detection circuit for power line according to claim 1, it is characterised in that: the capacitor CN and
Capacitor CL capacitor between plate.
3. a kind of zero cross detection circuit for power line according to claim 2, it is characterised in that: capacitor between the plate
It is the substrate layer of medium and the conducting block for the upper and lower surfaces for being located at substrate layer including pcb board (2).
4. a kind of zero cross detection circuit for power line according to claim 3, it is characterised in that: the conducting block is
Copper at and be in round pie conducting block (3).
5. a kind of zero cross detection circuit for power line according to claim 4, it is characterised in that: capacitor CN between plate
The surface area a of conducting block (3) equal to capacitor CN capacitance and pcb board (2) thickness product divided by free space dielectric
The product of the relative dielectric constant of constant and pcb board material；The surface area a of the conducting block (3) of capacitor CL is equal to capacitor CL's between plate
The product of capacitance and the thickness of pcb board (2) is divided by the dielectric constant of free space and multiplying for the relative dielectric constant of pcb board material
Product.
6. a kind of production method of the zero cross detection circuit according to claim 1 for power line, it includes following step
Suddenly, it is characterised in that:
Step 1: prepare reference voltage module (1), capacitive reactive element C1, capacitive reactive element C2, impedor Z1, impedor Z2, electricity
Hold CL, capacitor CN, pcb board (2), reference voltage VCC, resistance R3, resistance R4, resistance R5, resistance R6 and four blocks of round pie copper
Manufactured conducting block (3), wherein the thickness of the surface area a of two pieces of conducting blocks (3) capacitance equal to capacitor CL and pcb board (2)
Product divided by the dielectric constant of free space and the relative dielectric constant of pcb board material product, remaining two pieces of conducting blocks (3)
Surface area a equal to capacitor CN capacitance and pcb board (2) thickness product divided by free space dielectric constant and pcb board
The product of the relative dielectric constant of material；
Step 2: two regions being spaced apart will be delimited on pcb board (2), welded in the upper and lower surfaces in the region
Upper conducting block (3)；
Step 3: where conducting block (3) is electrically connected with power line L, conducting block (3) and impedance element immediately below the conducting block (3)
One end of part Z1 is electrically connected, and the other end of impedor Z1 is electrically connected with the anode of capacitive reactive element C1, the cathode of capacitive reactive element C1
Ground connection；Another conducting block (3) is electrically connected with power line N, and the conducting block (3) immediately below the conducting block (3) is with impedor Z2's
One end electrical connection, the other end of impedor Z2 are electrically connected with the anode of capacitive reactive element C2, and the cathode ground connection of capacitive reactive element C2 is held
The anode of anti-element C1 is electrically connected with an output end of zero detection circuit, and capacitive reactive element C2's is positive another with zero cross detection circuit
The electrical connection of one output end；The anode of capacitive reactive element C1 is electrically connected with one end of resistance R3, and the other end of resistance R3 is with resistance R4's
One end electrical connection, the other end of resistance R4 are electrically connected with the anode of capacitive reactive element C2, one end of resistance R5 and reference voltage VCC electricity
Connection, the other end of resistance R5 are electrically connected with one end of resistance R6, the other end ground connection of resistance R6, the company of resistance R3 and resistance R4
Node is connect to be electrically connected with resistance R5 with the connecting node of resistance R6.
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| CN201610362033.XA CN105891589B (en) | 2016-05-26 | 2016-05-26 | A kind of zero cross detection circuit and preparation method thereof for power line |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610362033.XA CN105891589B (en) | 2016-05-26 | 2016-05-26 | A kind of zero cross detection circuit and preparation method thereof for power line |
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| CN105891589B true CN105891589B (en) | 2018-12-25 |
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