CN105510700A - Multifunctional power tester based on voltage comparison circuit - Google Patents
Multifunctional power tester based on voltage comparison circuit Download PDFInfo
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- CN105510700A CN105510700A CN201510919722.1A CN201510919722A CN105510700A CN 105510700 A CN105510700 A CN 105510700A CN 201510919722 A CN201510919722 A CN 201510919722A CN 105510700 A CN105510700 A CN 105510700A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R21/00—Arrangements for measuring electric power or power factor
- G01R21/06—Arrangements for measuring electric power or power factor by measuring current and voltage
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/30—Structural combination of electric measuring instruments with basic electronic circuits, e.g. with amplifier
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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
Abstract
The invention discloses a multifunctional power tester based on a voltage comparison circuit. The multifunctional power tester is mainly composed of a single-chip microcomputer, a voltage transducer and a current transducer. The multifunctional power tester is further composed of a signal conversion module, a phase detection circuit and a display which are respectively connected with the single-chip microcomputer, a voltage sampling maintaining circuit and a current sampling maintaining circuit which are respectively connected with the signal conversion module, and a current comparison circuit and the voltage comparison circuit which are respectively connected with the phase detection circuit, wherein the voltage transducer is connected in series between voltage sampling maintaining circuit and the voltage comparison circuit, and the current transducer is connected in series between the current sampling maintaining circuit and the current comparison circuit. The multifunctional power tester provided by the invention can simultaneously test voltages, currents and power parameter signals of equipment, and enables test personnel to more comprehensively understand the operation condition of the equipment. At the same time, the voltage comparison circuit can convert voltage signals acquired by the voltage transducer into corresponding square wave signals, the conversion efficiency is high, and the test efficiency is improved accordingly.
Description
Technical field
The present invention relates to a kind of power measuring, specifically refer to a kind of multi-function power tester based on voltage comparator circuit.
Background technology
Current power measuring has been widely used in on-line checkingi and the maintenance of commercial unit.But traditional power measuring function is comparatively single, be only limitted to detect the power of equipment, then can not detect the key job parameter information such as working voltage and electric current of equipment, therefore comprehensively cannot reflect the ruuning situation of equipment.
Summary of the invention
The object of the invention is to the defect overcoming existing power measuring function singleness, a kind of multi-function power tester based on voltage comparator circuit is provided.
Object of the present invention is achieved through the following technical solutions: a kind of multi-function power tester based on voltage comparator circuit, primarily of single-chip microcomputer, voltage sensor, current sensor, the signal conversion module be connected with single-chip microcomputer respectively, phase detecting circuit and display, the voltage sample holding circuit be connected with signal conversion module respectively and current sample-and-hold circuit, and the current comparison circuit be connected with phase detecting circuit respectively and voltage comparator circuit form, described voltage sensor is serially connected between voltage sample holding circuit and voltage comparator circuit, current sensor is then serially connected between current sample-and-hold circuit and current comparison circuit, described voltage comparator circuit is by comparable chip U3, triode VT3, triode VT4, one end is connected with the CSN pin of comparable chip U3, the resistance R15 that the other end is then connected with voltage sensor, be serially connected in the resistance R18 between the CSN pin of comparable chip U3 and VSS pin, positive pole is connected with the CSN pin of comparable chip U3, the electric capacity C6 that negative pole is then connected with the collector of triode VT3, one end is connected with the emitter of triode VT3, the resistance R16 of other end ground connection, be serially connected in the resistance R17 between the base stage of triode VT3 and the DIM pin of comparable chip U3, positive pole is connected with the VIN pin of comparable chip U3, the electric capacity C7 of minus earth, N pole is connected with the negative pole of electric capacity C7, the diode D7 that P pole is then connected with the emitter of triode VT4, positive pole is connected with the DRV pin of comparable chip U3 after electric capacity C8, the electric capacity C9 that negative pole is then connected with phase detecting circuit, the resistance R19 be in parallel with electric capacity C9, and N pole is connected with the positive pole of electric capacity C9, the voltage stabilizing diode D8 of P pole ground connection forms, the VIN pin of described comparable chip U3 is connected with the base stage of triode VT4, and its VCC pin is then connected with the positive pole of electric capacity C9, the collector of described triode VT4 is then connected with the base stage of triode VT3.
Further, described phase detecting circuit by current input circuit, voltage input circuit, the coupled circuit be simultaneously connected with voltage input circuit with current input circuit, and the Phase Processing circuit be connected with coupled circuit forms.
Described current input circuit is by amplifier P1, be serially connected in the resistance R3 between the positive pole of amplifier P1 and output terminal, the diode D2 that P pole is connected with the positive pole of amplifier P1, N pole is then connected with the negative pole of amplifier P1, the diode D1 of ground connection while N pole is connected with the positive pole of amplifier P1, P pole is then connected with the negative pole of amplifier P1, the resistance R1 that one end is connected with the positive pole of amplifier P1, the other end is then connected with current comparison circuit, and the electric capacity C1 that positive pole is connected with the output terminal of amplifier P1, negative pole is then connected with coupled circuit forms.
Described voltage input circuit is by amplifier P2, be serially connected in the resistance R4 between the positive pole of amplifier P2 and output terminal, the diode D4 that P pole is connected with the positive pole of amplifier P2, N pole is then connected with the negative pole of amplifier P2, the diode D3 of ground connection while N pole is connected with the positive pole of amplifier P2, P pole is then connected with the negative pole of amplifier P2, the resistance R2 that one end is connected with the positive pole of amplifier P2, the other end is then connected with the negative pole of electric capacity C9, and the electric capacity C2 that positive pole is connected with the output terminal of amplifier P2, negative pole is then connected with coupled circuit forms.
Described coupled circuit is by coupling chip U1, triode VT1, electric capacity C3, N pole is connected with the emitter of triode VT1, the diode D5 that P pole is then connected with the positive pole of electric capacity C3 after resistance R5, be serially connected in the resistance R7 between the negative pole of electric capacity C3 and the VDD pin of coupling chip U1, one end is connected with the CS pin of coupling chip U1, the resistance R6 that the other end is then connected with the negative pole of electric capacity C2, be serially connected in the resistance R8 between the base stage of triode VT1 and emitter, and the resistance R10 be serially connected between the emitter of triode VT1 and the FB pin of coupling chip U1 forms, the BD pin of described coupling chip U1 is connected with the base stage of triode VT1, ground connection while its GND pin is then connected with the negative pole of electric capacity C3, and its FB pin is then connected with Phase Processing circuit, and its SW pin is then connected with the collector of triode VT1, the emitter of described triode VT1 is then connected with Phase Processing circuit with the negative pole of electric capacity C1 simultaneously.
Described Phase Processing circuit is by process chip U2, triode VT2, positive pole is connected with the RD pin of process chip U2 after resistance R9, the electric capacity C4 of minus earth, N pole is connected with the VDD pin of process chip U2 after resistance R12, the diode D6 that P pole is then connected with the B pin of process chip U2, be serially connected in the resistance R11 between the negative pole of electric capacity C4 and the VSS pin of process chip U2, be serially connected in the resistance R13 between the VDD pin of process chip U2 and CX pin, positive pole is connected with the Q pin of process chip U2, the electric capacity C5 that negative pole is then connected with the emitter of triode VT2, and one end is connected with the collector of triode VT2, the resistance R14 that the other end then forms the output terminal of this Phase Processing circuit jointly with the Q pin of process chip U2 forms, the VDD pin of described process chip U2 is connected with the emitter of triode VT1, its CX pin is then connected with the positive pole of electric capacity C5, its A pin is then connected with the base stage of triode VT2, its RX pin is connected with the collector of triode VT2, its VSS pin ground connection, its B pin is then connected with the FB pin of coupling chip U1, the output terminal of described Phase Processing circuit is connected with single-chip microcomputer.
In order to reach better implementation result, described coupling chip U1 is ACT364US-T integrated chip, and process chip U2 is then CD4528 integrated chip, and described comparable chip U3 is QX5241 integrated chip.
The present invention comparatively prior art compares, and has the following advantages and beneficial effect:
(1) the present invention can the simultaneously voltage of testing apparatus, electric current and power parameter signal, makes tester more comprehensively can understand the ruuning situation of equipment.
(2) the present invention is high to the test of voltage, electric current and power parameter very precision, avoids tester to produce erroneous judgement to machine operation.
(3) voltage comparator circuit of the present invention can be converted to the voltage signal that voltage sensor collects corresponding square-wave signal, and its conversion efficiency is high, thus improves testing efficiency of the present invention.
Accompanying drawing explanation
Fig. 1 is one-piece construction block diagram of the present invention.
Fig. 2 is the structural drawing of phase detecting circuit of the present invention.
Fig. 3 is the structural drawing of voltage comparator circuit of the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
As shown in Figure 1, multi-function power tester based on voltage comparator circuit of the present invention, primarily of single-chip microcomputer, voltage sensor, current sensor, the signal conversion module be connected with single-chip microcomputer respectively, phase detecting circuit and display, the voltage sample holding circuit be connected with signal conversion module respectively and current sample-and-hold circuit, and the current comparison circuit be connected with phase detecting circuit respectively and voltage comparator circuit form; Described voltage sensor is serially connected between voltage sample holding circuit and voltage comparator circuit; Current sensor is then serially connected between current sample-and-hold circuit and current comparison circuit.
Wherein, single-chip microcomputer is as processing enter of the present invention, and it preferentially adopts AT89C51 type single-chip microcomputer to realize.Signal conversion module is then for being converted to electric signal the voltage and current simulating signal collected, and it is preferably ADC0809 type A/D conversion chip, and the ALE pin of this ADC0809 type A/D conversion chip is connected with the PSEN pin of AT89C51 type single-chip microcomputer.Voltage sensor is used for the voltage signal of collecting device, its CHV-25P type voltage sensor preferentially selecting Beijing Sen She Electronics Co., Ltd. to produce.Current sensor is used for the current signal of collecting device, its CHB-100S type current sensor preferentially selecting Beijing Sen She Electronics Co., Ltd. to produce.The output terminal of voltage sample holding circuit is connected with the EOC pin of ADC0809 type A/D conversion chip, and it can make to remain unchanged through the voltage analog signal of its inside.The output terminal of current sample-and-hold circuit is then connected with the OE pin of ADC0809 type A/D conversion chip, and it can make to remain unchanged through the current analog signal of its inside.Current comparison circuit can be converted to the current signal that current sensor collects corresponding square-wave signal.Voltage comparator circuit then can be converted to the voltage signal that voltage sensor collects corresponding square-wave signal.The square-wave signal of this phase detecting circuit then for carrying current comparison circuit and voltage comparator circuit processes, thus the phase signal obtaining one group of complementation is carried through single-chip microcomputer.Display is then for the parameter value of the real-time working voltage of display device, electric current and output power.This voltage sample holding circuit, current sample-and-hold circuit and current comparison circuit all adopt existing technology to realize.
In order to better, the square-wave signal that current comparison circuit and voltage comparator circuit are carried is processed, as shown in Figure 2, this phase detecting circuit is by current input circuit, voltage input circuit, the coupled circuit be simultaneously connected with voltage input circuit with current input circuit, and the Phase Processing circuit be connected with coupled circuit forms.
Wherein, described current input circuit is used for the square-wave signal that received current comparator circuit exports, and it is by amplifier P1, resistance R1, resistance R3, diode D1, and diode D2 and electric capacity C1 forms.During connection, between the positive pole that resistance R3 is serially connected in amplifier P1 and output terminal.The P pole of diode D2 is connected with the positive pole of amplifier P1, its N pole is then connected with the negative pole of amplifier P1.Ground connection while the N pole of diode D1 is connected with the positive pole of amplifier P1, its P pole is then connected with the negative pole of amplifier P1.One end of resistance R1 is connected with the positive pole of amplifier P1, its other end is then connected with current comparison circuit.The positive pole of electric capacity C1 is connected with the output terminal of amplifier P1, its negative pole is then connected with coupled circuit.
Described voltage input circuit is then for the square-wave signal of receiver voltage comparator circuit output, it is by amplifier P2, be serially connected in the resistance R4 between the positive pole of amplifier P2 and output terminal, P pole is connected with the positive pole of amplifier P2, the diode D4 that N pole is then connected with the negative pole of amplifier P2, N pole is connected with the positive pole of amplifier P2, the diode D3 of ground connection while P pole is then connected with the negative pole of amplifier P2, one end is connected with the positive pole of amplifier P2, the resistance R2 that the other end is then connected with the output terminal of voltage comparator circuit, and positive pole is connected with the output terminal of amplifier P2, the electric capacity C2 that negative pole is then connected with coupled circuit forms.
Described coupled circuit be used for current input circuit and voltage input circuit the square-wave signal carried into be coupled, it is by coupling chip U1, triode VT1, electric capacity C3, resistance R5, resistance R6, resistance R7, resistance R8, resistance R10, and diode D5 forms.
Wherein, coupling chip U1, triode VT1 and resistance R8 form one-level amplifier circuit, and the concrete structure of this one-level amplifier circuit is: between the base stage that resistance R8 is serially connected in triode VT1 and emitter.The BD pin of coupling chip U1 is connected with the base stage of triode VT1, and its SW pin is then connected with the collector of triode VT1.Meanwhile, the N pole of diode D5 is connected with the emitter of triode VT1, its P pole is then connected with the positive pole of electric capacity C3 after resistance R5.Resistance R7 is serially connected between the negative pole of electric capacity C3 and the VDD pin of coupling chip U1.One end of resistance R6 is connected with the CS pin of coupling chip U1, its other end is then connected with the negative pole of electric capacity C2.Resistance R10 is then serially connected between the emitter of triode VT1 and the FB pin of coupling chip U1.Ground connection while the GND pin of described coupling chip U1 is connected with the negative pole of electric capacity C3, its FB pin is then connected with Phase Processing circuit.The emitter of described triode VT1 is then connected with Phase Processing circuit with the negative pole of electric capacity C1 simultaneously.
This diode D5, resistance R5, resistance R6, electric capacity C3 and resistance R7 form identification circuit, and this identification circuit can identify square-wave signal that current comparison circuit exports and the square-wave signal that voltage comparator circuit exports.Square-wave signal after identifying is input to one-level amplifier circuit and carries out coupling amplification process, and two kinds of square wave transfer efficiency after coupling amplification process are higher, and square-wave signal can be avoided in the process of transmission to occur loss.In order to reach better implementation result, this coupling chip is preferably ACT364US-T integrated chip to realize, and this electric capacity C3 then adopts coupling capacitance.
Described Phase Processing circuit is by process chip U2, and triode VT2, resistance R9, resistance R11, resistance R12, resistance R13, resistance R14, electric capacity C4, electric capacity C5 and diode D6 form.
During connection, the positive pole of electric capacity C4 is connected with the RD pin of process chip U2 after resistance R9, its minus earth.The N pole of diode D6 is connected with the VDD pin of process chip U2 after resistance R12, its P pole is then connected with the B pin of process chip U2.Resistance R11 is serially connected between the negative pole of electric capacity C4 and the VSS pin of process chip U2.Resistance R13 is serially connected between the VDD pin of process chip U2 and CX pin.The positive pole of electric capacity C5 is connected with the Q pin of process chip U2, its negative pole is then connected with the emitter of triode VT2.One end of resistance R14 is connected with the collector of triode VT2, its other end is then connected with the XTAL2 pin of AT89C51 type single-chip microcomputer.The Q pin of described process chip U2 is then connected with the XTAL1 pin of AT89C51 type single-chip microcomputer.The VDD pin of described process chip U2 is connected with the emitter of triode VT1, its CX pin is then connected with the positive pole of electric capacity C5, its A pin is then connected with the base stage of triode VT2, its RX pin is connected with the collector of triode VT2, its VSS pin ground connection, its B pin is then connected with the FB pin of coupling chip U1.
Wherein, resistance R12, resistance R9, resistance R11, electric capacity C4 and diode D6 form testing circuit, and this testing circuit can detect the phase differential of two kinds of different square waves.Process chip U2 then processes two kinds of square waves according to this phase differential, thus the phase signal obtaining a composition complementation flows to single-chip microcomputer.This electric capacity C5 then strobes, and it can filter out the undesired signal that circuit self produces.In order to reach better implementation result, process chip U2 is preferably CD4528 integrated chip to realize.
As shown in Figure 3, described voltage comparator circuit is by comparable chip U3, and triode VT3, triode VT4, resistance R15, resistance R16, resistance R17, resistance R18, resistance R19, electric capacity C6, electric capacity C7, electric capacity C8, electric capacity C9, diode D7 and voltage stabilizing diode D8 form.
During connection, one end of resistance R15 is connected with the CSN pin of comparable chip U3, its other end is then connected with voltage sensor.Resistance R18 is serially connected between the CSN pin of comparable chip U3 and VSS pin.The positive pole of electric capacity C6 is connected with the CSN pin of comparable chip U3, its negative pole is then connected with the collector of triode VT3.One end of resistance R16 is connected with the emitter of triode VT3, its other end ground connection.Resistance R17 is serially connected between the base stage of triode VT3 and the DIM pin of comparable chip U3.The positive pole of electric capacity C7 is connected with the VIN pin of comparable chip U3, its minus earth.The N pole of diode D7 is connected with the negative pole of electric capacity C7, its P pole is then connected with the emitter of triode VT4.The positive pole of electric capacity C9 is connected with the negative pole of electric capacity C8, and its negative pole is then connected with the positive pole of amplifier P2 after resistance R2.The positive pole of described electric capacity C8 is then connected with the DRV pin of comparable chip U3.Resistance R19 and electric capacity C9 is in parallel.The N pole of voltage stabilizing diode D8 is connected with the positive pole of electric capacity C9, its P pole ground connection.The VIN pin of described comparable chip U3 is connected with the base stage of triode VT4, and its VCC pin is then connected with the positive pole of electric capacity C9.The collector of described triode VT4 is then connected with the base stage of triode VT3.
After being input to voltage comparator circuit from the voltage analog signal of voltage sensor output, after triode VT3 and triode VT4 process, become more stable.Signal after treatment exports, because signal is through triode VT3 and triode VT4 process, so the conversion efficiency of comparable chip U3 to signal is higher from its DRV pin after being converted to square-wave signal by comparable chip U3.Phase detecting circuit is exported to after the RC filter filtering of this square-wave signal via resistance R19 and electric capacity C9 composition.Voltage stabilizing diode D8 then can make the square-wave signal after output more stable.In order to reach better implementation result, described comparable chip U3 is preferably QX5241 integrated chip to realize.
During work, the operating voltage simulating signal of voltage sensor collecting device also sends to voltage sample holding circuit, current sensor then collecting device working current simulating signal and send to current sample-and-hold circuit.This voltage analog signal inputs to signal conversion module after voltage sample resume module, and current analog signal also inputs to signal conversion module after current sample-and-hold circuit process.This signal conversion module is converted to corresponding electric signal voltage analog signal and current analog signal and flows to single-chip microcomputer, and send to display after the electric signal of single-chip microcomputer to input identifies, display then shows corresponding magnitude of voltage and current value.
Meanwhile, voltage sensor also sends to voltage comparator circuit voltage analog signal, and current sensor then sends to current comparison circuit current analog signal.This voltage comparator circuit is converted to the voltage analog signal of input corresponding square-wave signal and sends to phase detecting circuit, current comparison circuit is also converted to corresponding square-wave signal the current analog signal of input and sends to phase detecting circuit, this phase detecting circuit sends to single-chip microcomputer the phase signal that two kinds of square-wave signals carry out processing rear formation one group of complementation, single-chip microcomputer calculates the output power of equipment by this signal, and power signal is sent to display, display then demonstrates concrete power parameter.
As mentioned above, just well the present invention can be implemented.
Claims (7)
1. the multi-function power tester based on voltage comparator circuit, primarily of single-chip microcomputer, voltage sensor, current sensor, the signal conversion module be connected with single-chip microcomputer respectively, phase detecting circuit and display, the voltage sample holding circuit be connected with signal conversion module respectively and current sample-and-hold circuit, and the current comparison circuit be connected with phase detecting circuit respectively and voltage comparator circuit form, described voltage sensor is serially connected between voltage sample holding circuit and voltage comparator circuit, current sensor is then serially connected between current sample-and-hold circuit and current comparison circuit, it is characterized in that, described voltage comparator circuit is by comparable chip U3, triode VT3, triode VT4, one end is connected with the CSN pin of comparable chip U3, the resistance R15 that the other end is then connected with voltage sensor, be serially connected in the resistance R18 between the CSN pin of comparable chip U3 and VSS pin, positive pole is connected with the CSN pin of comparable chip U3, the electric capacity C6 that negative pole is then connected with the collector of triode VT3, one end is connected with the emitter of triode VT3, the resistance R16 of other end ground connection, be serially connected in the resistance R17 between the base stage of triode VT3 and the DIM pin of comparable chip U3, positive pole is connected with the VIN pin of comparable chip U3, the electric capacity C7 of minus earth, N pole is connected with the negative pole of electric capacity C7, the diode D7 that P pole is then connected with the emitter of triode VT4, positive pole is connected with the DRV pin of comparable chip U3 after electric capacity C8, the electric capacity C9 that negative pole is then connected with phase detecting circuit, the resistance R19 be in parallel with electric capacity C9, and N pole is connected with the positive pole of electric capacity C9, the voltage stabilizing diode D8 of P pole ground connection forms, the VIN pin of described comparable chip U3 is connected with the base stage of triode VT4, and its VCC pin is then connected with the positive pole of electric capacity C9, the collector of described triode VT4 is then connected with the base stage of triode VT3.
2. a kind of multi-function power tester based on voltage comparator circuit according to claim 1, it is characterized in that: described phase detecting circuit is by current input circuit, voltage input circuit, the coupled circuit be simultaneously connected with voltage input circuit with current input circuit, and the Phase Processing circuit be connected with coupled circuit forms.
3. a kind of multi-function power tester based on voltage comparator circuit according to claim 2, it is characterized in that: described current input circuit is by amplifier P1, be serially connected in the resistance R3 between the positive pole of amplifier P1 and output terminal, P pole is connected with the positive pole of amplifier P1, the diode D2 that N pole is then connected with the negative pole of amplifier P1, N pole is connected with the positive pole of amplifier P1, the diode D1 of ground connection while P pole is then connected with the negative pole of amplifier P1, one end is connected with the positive pole of amplifier P1, the resistance R1 that the other end is then connected with current comparison circuit, and positive pole is connected with the output terminal of amplifier P1, the electric capacity C1 that negative pole is then connected with coupled circuit forms.
4. a kind of multi-function power tester based on voltage comparator circuit according to claim 3, it is characterized in that: described voltage input circuit is by amplifier P2, be serially connected in the resistance R4 between the positive pole of amplifier P2 and output terminal, P pole is connected with the positive pole of amplifier P2, the diode D4 that N pole is then connected with the negative pole of amplifier P2, N pole is connected with the positive pole of amplifier P2, the diode D3 of ground connection while P pole is then connected with the negative pole of amplifier P2, one end is connected with the positive pole of amplifier P2, the resistance R2 that the other end is then connected with the negative pole of electric capacity C9, and positive pole is connected with the output terminal of amplifier P2, the electric capacity C2 that negative pole is then connected with coupled circuit forms.
5. a kind of multi-function power tester based on voltage comparator circuit according to claim 4, it is characterized in that: described coupled circuit is by coupling chip U1, triode VT1, electric capacity C3, N pole is connected with the emitter of triode VT1, the diode D5 that P pole is then connected with the positive pole of electric capacity C3 after resistance R5, be serially connected in the resistance R7 between the negative pole of electric capacity C3 and the VDD pin of coupling chip U1, one end is connected with the CS pin of coupling chip U1, the resistance R6 that the other end is then connected with the negative pole of electric capacity C2, be serially connected in the resistance R8 between the base stage of triode VT1 and emitter, and the resistance R10 be serially connected between the emitter of triode VT1 and the FB pin of coupling chip U1 forms, the BD pin of described coupling chip U1 is connected with the base stage of triode VT1, ground connection while its GND pin is then connected with the negative pole of electric capacity C3, and its FB pin is then connected with Phase Processing circuit, and its SW pin is then connected with the collector of triode VT1, the emitter of described triode VT1 is then connected with Phase Processing circuit with the negative pole of electric capacity C1 simultaneously.
6. a kind of multi-function power tester based on voltage comparator circuit according to claim 5, it is characterized in that: described Phase Processing circuit is by process chip U2, triode VT2, positive pole is connected with the RD pin of process chip U2 after resistance R9, the electric capacity C4 of minus earth, N pole is connected with the VDD pin of process chip U2 after resistance R12, the diode D6 that P pole is then connected with the B pin of process chip U2, be serially connected in the resistance R11 between the negative pole of electric capacity C4 and the VSS pin of process chip U2, be serially connected in the resistance R13 between the VDD pin of process chip U2 and CX pin, positive pole is connected with the Q pin of process chip U2, the electric capacity C5 that negative pole is then connected with the emitter of triode VT2, and one end is connected with the collector of triode VT2, the resistance R14 that the other end then forms the output terminal of this Phase Processing circuit jointly with the Q pin of process chip U2 forms, the VDD pin of described process chip U2 is connected with the emitter of triode VT1, its CX pin is then connected with the positive pole of electric capacity C5, its A pin is then connected with the base stage of triode VT2, its RX pin is connected with the collector of triode VT2, its VSS pin ground connection, its B pin is then connected with the FB pin of coupling chip U1, the output terminal of described Phase Processing circuit is connected with single-chip microcomputer.
7. a kind of multi-function power tester based on voltage comparator circuit according to claim 6, is characterized in that: described coupling chip U1 is ACT364US-T integrated chip, and process chip U2 is then CD4528 integrated chip; Described comparable chip U3 is QX5241 integrated chip.
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| CN204131426U (en) * | 2013-12-04 | 2015-01-28 | 广东电网公司佛山供电局 | With the high-voltage pulse generator of phase-detection |
| US20150212130A1 (en) * | 2014-01-28 | 2015-07-30 | Lsis Co., Ltd. | Three-phase wiring detection device and coincidence phase detection method |
| CN203965514U (en) * | 2014-02-08 | 2014-11-26 | 山东明华光电科技有限公司 | Digital power tester |
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Application publication date: 20160420 |