CN205139275U - Isolated form electric wire netting transition detection device - Google Patents
Isolated form electric wire netting transition detection device Download PDFInfo
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- CN205139275U CN205139275U CN201520908906.3U CN201520908906U CN205139275U CN 205139275 U CN205139275 U CN 205139275U CN 201520908906 U CN201520908906 U CN 201520908906U CN 205139275 U CN205139275 U CN 205139275U
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Abstract
The utility model relates to an isolated form electric wire netting transition detection device, including positive transition sampling circuit, a sample hold circuit, burden transition sampling circuit, the 2nd sample hold circuit, alternating current rising edge acquisition circuit, positive transition detection circuitry, burden transition detection circuitry, the discharge circuit, charging circuit, microprocessor, sharing drive circuit, sample hold circuit 0, sample hold circuit 1 and RS232 interface, its sample hold circuit 2: positive transition sampling circuit, burden transition sampling circuit, alternating current rising edge acquisition circuit, positive transition detection circuitry and burden transition detection circuitry's input all with electric wire netting looks line connection, a sample hold circuit and the 2nd sample hold circuit's one end is connected with burden transition sampling circuit's output with positive transition sampling circuit respectively, the electric wire netting central line is all connected to the other end, discharge circuit connection between a sample hold circuit's one end and electric wire netting central line, charging circuit connects between the 2nd sample hold circuit's one end and positive electricity potential source.
Description
Technical field
The utility model relates to a kind of electric energy quality detection device, particularly discloses a kind of isolated form electric network transient inspecting device, is applied in the digital electronic products such as computing machine.
Background technology
Emerging in multitude and using along with digital electronic products such as such as computing machines, constantly produce transition interference feed-in electrical network, and electronic equipment causes work not normal due to the transition interference of electrical network when a large amount of electronic equipment uses.Therefore, during the quality of power supply is evaluated, grid transient is an evaluation index of can not ignore, and is very necessary to the detection of grid transient.
Because grid transient pulse width is generally 1 ~ 20 μ S, amplitude may be up to 2500V, therefore higher to the requirement of detection technique, such as just require checkout equipment can to sample in time ringing pulse storing when pulse width is as short as 1 μ S, in the process, the voltage of high-amplitude is to the requirement of attenuator circuit, and the interference that pulse may bring is the factor needing to consider.
Existing electric energy quality detection device only can measure mains frequency, voltage and current effective value, power and harmonic analysis etc. usually, does not have the measuring ability to grid transient.
Summary of the invention
The purpose of this utility model is the defect in order to solve existing for existing electric energy quality detection device, and open one can to detect pulse width low, voltage amplitude is high, record the transition polarity of its grid transient, transient amplitude and transition phase place, and can the isolated form electric network transient inspecting device detecting data feeding internet.
The utility model is achieved in that a kind of isolated form electric network transient inspecting device, comprise positive transition sample circuit, first sampling hold circuit, negative transition sample circuit, second sampling hold circuit, alternating current rising edge Acquisition Circuit, positive transient detection circuit, negative transient detection circuit, discharge circuit, charging circuit, microprocessor, common drive circuit, clock chip, nonvolatile memory and RS232 interface, it is characterized in that: the input end of described positive transition sample circuit is connected with electrical network phase line, to sample positive transition from electrical network phase line, to the positive transient voltage after its decay also output attenuatoin, one end of the first described sampling hold circuit is connected with the output terminal of positive transition sample circuit, and the other end connects electrical network center line, for keeping the positive transient voltage after decaying, the input end of described negative transition sample circuit is connected with electrical network phase line, from the negative transition of electrical network phase line sampling, to the negative transient voltage after its decay also output attenuatoin, one end of the second described sampling hold circuit is connected with the output terminal of negative transition sample circuit, and the other end connects electrical network center line, for keeping the negative transient voltage after decaying, the input end of described alternating current rising edge Acquisition Circuit is connected with electrical network phase line, for detecting alternating current rising edge and exporting the 3rd look-at-me accordingly, the input end of described positive transient detection circuit is connected with electrical network phase line, for responding positive transition, exports the first look-at-me by photo-coupler, the input end of described negative transient detection circuit is connected with electrical network phase line, for responding negative transition, exports the second look-at-me by photo-coupler, described discharge circuit is connected between one end of the first sampling hold circuit and electrical network center line, receives the first control signal and discharge to the first sampling hold circuit by photo-coupler, between one end that described charging circuit is connected to the second sampling hold circuit and positive voltage source, receive the second control signal by photo-coupler and the second sampling hold circuit is charged, two counting mouths of described microprocessor are connected with one end of one end of the V/F voltage to frequency converter of the first sampling hold circuit and the V/F voltage to frequency converter of the second sampling hold circuit respectively by two photo-couplers, the middle fracture of microprocessor is connected with the output terminal of alternating current rising edge Acquisition Circuit, positive transient detection circuit and negative transient detection circuit respectively by photo-coupler, and the I/O mouth of microprocessor is connected with the control end of discharge circuit and charging circuit respectively by two photo-couplers, described microprocessor responds the 3rd look-at-me and start timing, microprocessor responds first look-at-me or the second look-at-me and to sample positive transient voltage or negative transient voltage stop timing from two counting mouths, and the first control signal or the second control signal is exported to discharge circuit or charging circuit by photo-coupler after sampling terminates.The diode that described positive transition sample circuit comprises a resistance of mutually series connection, an electric capacity is connected with a forward; The first described sampling hold circuit is made up of electric capacity; Described negative transition sample circuit comprises the diode of a resistance, an electric capacity and an Opposite direction connection of connecting mutually; The second described sampling hold circuit is made up of electric capacity.Described alternating current rising edge Acquisition Circuit comprises the stabilivolt being connected on a resistance between electrical network phase line and electrical network center line and an Opposite direction connection successively, also comprise one first driving circuit, the input end of the first driving circuit is connected with the link of stabilivolt with the resistance of alternating current rising edge Acquisition Circuit, and the output terminal of the first driving circuit exports the 3rd look-at-me by photo-coupler.Described positive transient detection circuit comprise be connected on an electric capacity between electrical network phase line with electrical network center line successively, diode that a forward is connected and a resistance, also comprise one second driving circuit, the input end of the second driving circuit is connected with the link of resistance with the positive diode of transient detection circuit, and the output terminal of the second driving circuit exports the first look-at-me by photo-coupler.Described common drive circuit is XOR circuit, one input end of common drive circuit is connected with the link of stabilivolt with the resistance of alternating current rising edge Acquisition Circuit, another input end of common drive circuit is connected with the link of resistance with the positive diode of transient detection circuit, and the output terminal of common drive circuit exports the 3rd look-at-me and the first look-at-me by photo-coupler.Described negative transient detection circuit comprises the first resistance, the first stabilivolt of differential concatenation and the second stabilivolt, the diode that the forward of connecting successively connects, the second resistance and the 3rd resistance, the electric capacity of connecting successively and the 4th resistance, and phase inverter; One end of the first described resistance is connected on a constant pressure source; First stabilivolt of described differential concatenation and the second stabilivolt, one end of its series circuit is connected with the other end of the first resistance, and the other end of series circuit is connected with electrical network center line; The diode that the described forward of connecting successively connects, the second resistance and the 3rd resistance, one end of its series circuit is connected with the other end of the first resistance, and the other end of series circuit is connected with electrical network center line; The described electric capacity of connecting successively and the 4th resistance, one end of its series circuit is connected with electrical network phase line, and the other end of series circuit is connected with the link of the second resistance and the 3rd resistance; One end of described phase inverter is connected with the link of the second resistance and the 3rd resistance, and the other end of phase inverter exports the second look-at-me.Described clock chip is connected with microprocessor, in order to real-time timing; Described nonvolatile memory is connected with microprocessor.The first control signal that described microprocessor exports is elementary to ground through photo-coupler by resistance, and photo-coupler is secondary is connected to the first sampling hold circuit with resistance; The second control signal that described microprocessor exports is elementary to ground through photo-coupler by resistance, and photo-coupler is secondary is connected to the second sampling hold circuit with resistance.The output of described alternating current rising edge Acquisition Circuit is elementary and through resistance to ground by photo-coupler, secondary the 3rd look-at-me exporting microprocessor with resistance of photo-coupler; The output of described positive transient detection circuit is elementary and through resistance to ground by photo-coupler, secondary the first look-at-me exporting microprocessor with resistance of photo-coupler; The output of described negative transient detection circuit is elementary and through resistance to ground by photo-coupler, secondary the second look-at-me exporting microprocessor with resistance of photo-coupler.One end of the first described sampling hold circuit is connected with V/F voltage to frequency converter, the frequency output terminal of V/F voltage to frequency converter by photo-coupler elementary and through resistance to, the secondary counting mouth being connected microprocessor with resistance of photo-coupler, positive transient voltage of sampling; One end of the second described sampling hold circuit is connected with V/F voltage to frequency converter, the frequency output terminal of V/F voltage to frequency converter by photo-coupler elementary and through resistance to, the secondary counting mouth being connected microprocessor with resistance of photo-coupler, the negative transient voltage of sampling.
The beneficial effects of the utility model are: with simple circuit realiration, the grid transient that pulsewidth is little, amplitude is high detects the utility model, solves the defect that electric energy quality detection device for a long time can not detect this very important parameter of grid transient.The utility model have recorded polarity, amplitude, the phase angle of grid transient, and the parameters such as time of origin, for analysis, provide scientific basis for improving power grid quality.The utility model uses photo-coupler that grid transient detection is isolated with microprocessor and data network, greatly reduce grid transient pulse to the impact of microprocessor and interference, improve the operational reliability of microprocessor, simultaneously, photo-coupler has been isolated the circuit between electrical network and microprocessor and has been contacted, and makes microprocessor can accessing Internet by RS232 interface.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the utility model isolated form electric network transient inspecting device embodiment 1.
Fig. 2 is the electrical schematic diagram of embodiment illustrated in fig. 11.
Fig. 3 is the theory diagram of the utility model isolated form electric network transient inspecting device embodiment 2.
Fig. 4 is the electrical schematic diagram of embodiment illustrated in fig. 32.
Fig. 5 is grid transient waveform schematic diagram.
In the drawings: 110, positive transition sample circuit; 120, the first sampling hold circuit; 130, negative transition sample circuit; 140, the second sampling hold circuit; 150, alternating current rising edge Acquisition Circuit; 160, positive transient detection circuit; 170, negative transient detection circuit; 180, discharge circuit; 190, charging circuit; 10, microprocessor; 11, common drive circuit; 12, clock chip; 13, nonvolatile memory; 14, RS232 interface; 15, electrical network phase line; 16, positive transition; 17, electrical network center line; 18, negative transition; 19, the 3rd look-at-me; 21, the first look-at-me; 22, the second look-at-me; 210, the first photo-coupler; 220, the second photo-coupler; 230, the 3rd photo-coupler; 240, the 4th photo-coupler; 250, the 5th photo-coupler; 260, the 6th photo-coupler; 270, the 7th photo-coupler; 23, the first control signal; 24, positive voltage source; 25, the second control signal; 26, mouth is counted; 280, a V/F voltage to frequency converter; 290, the 2nd V/F voltage to frequency converter; 28, middle fracture; 29, I/O mouth; 111, the 5th resistance; 112, the first electric capacity; 113, the first diode; 121, the second electric capacity; 131, the 6th resistance; 132, the 3rd electric capacity; 133, the second diode; 141, the 4th electric capacity; 151, the 7th resistance; 152, the 3rd stabilivolt; 153, the first driving circuit; 161, the 5th electric capacity; 162, the 3rd diode; 163, the 8th resistance; 164, the second driving circuit; 171, the first resistance; 172, the first stabilivolt; 173, the second stabilivolt; 174, the 4th diode; 175, the second resistance; 176, the 3rd resistance; 177, the 6th electric capacity; 178, the 4th resistance; 179, phase inverter; 30, constant pressure source; 211, the 9th resistance; 212, the first photo-coupler is elementary; 213, the first photo-coupler is secondary; 214, the tenth resistance; 241, the 11 resistance; 242, the 4th photo-coupler is elementary; 243, the 4th photo-coupler is secondary; 244, the 12 resistance; 252, the 5th photo-coupler is elementary; 251, the 13 resistance; 253, the 5th photo-coupler is secondary; 254, the 14 resistance; 262, the 6th photo-coupler is elementary; 261, the 15 resistance; 263, the 6th photo-coupler is secondary; 264, the 16 resistance; 272, the 7th photo-coupler is elementary; 271, the 17 resistance; 273, the 7th photo-coupler is secondary; 274, the 18 resistance; 222, the second photo-coupler is elementary; 221, the 19 resistance; 223, the second photo-coupler is secondary; 224, the 20 resistance; 232, the 3rd photo-coupler is elementary; 231, the 21 resistance; 233, the 3rd photo-coupler is secondary; 234, the 22 resistance.
Embodiment
Below in conjunction with specific embodiment, set forth originally newly practical further.
Embodiment 1:
With reference to the accompanying drawings 1 and 2, the structure of isolated form electric network transient inspecting device comprises positive transition sample circuit 110, first sampling hold circuit 120, negative transition sample circuit 130, second sampling hold circuit 140, alternating current rising edge Acquisition Circuit 150, positive transient detection circuit 160, negative transient detection circuit 170, discharge circuit 180, charging circuit 190, microprocessor 10, clock chip 12, nonvolatile memory 13 and RS232 interface 14, the input end of described positive transition sample circuit 110 is connected with electrical network phase line 15, to sample positive transition 16 from electrical network phase line 15, to the positive transient voltage after its decay also output attenuatoin, one end of the first described sampling hold circuit 120 is connected with the output terminal of positive transition sample circuit 110, and the other end connects electrical network center line 17, for keeping the positive transient voltage after decaying, the input end of described negative transition sample circuit 130 is connected with electrical network phase line 15, samples bear transition 18 from electrical network phase line 15, to the negative transient voltage after its decay also output attenuatoin, one end of the second described sampling hold circuit 140 is connected with the output terminal of negative transition sample circuit 130, and the other end connects electrical network center line 17, for keeping the negative transient voltage after decaying, the input end of described alternating current rising edge Acquisition Circuit 150 is connected with electrical network phase line 15, for detecting alternating current rising edge and exporting the 3rd look-at-me 19 accordingly, the input end of described positive transient detection circuit 160 is connected with electrical network phase line 15, for responding positive transition 16, exports the first look-at-me 21 by the 6th photo-coupler 260, the input end of described negative transient detection circuit 170 is connected with electrical network phase line 15, for responding negative transition 18, exports the second look-at-me 22 by the 7th photo-coupler 270, between one end that described discharge circuit 180 is connected to the first sampling hold circuit 120 and electrical network center line 17, receive the first control signal 23 by the first photo-coupler 210 and the first sampling hold circuit 120 is discharged, between one end that described charging circuit 190 is connected to the second sampling hold circuit 140 and positive voltage source 24, receive the second control signal 25 by the 4th photo-coupler 240 and the second sampling hold circuit 140 is charged, one counting mouth 26 of described microprocessor 10 is connected with one end of a V/F voltage to frequency converter 280 of the first sampling hold circuit 120 by the second photo-coupler 220, another counting mouth 26 of microprocessor 10 is connected with one end of the 2nd V/F voltage to frequency converter 290 of the second sampling hold circuit 140 by the 3rd photo-coupler 230, microprocessor 10 one in fracture 28 be connected with the output terminal of alternating current rising edge Acquisition Circuit 150 by the 5th photo-coupler 250, microprocessor 10 one in fracture 28 be connected with the output terminal of positive transient detection circuit 160 by the 6th photo-coupler 260, microprocessor 10 one in fracture 28 be connected with the output terminal of negative transient detection circuit 170 by the 7th photo-coupler 270, one I/O mouth 29 of microprocessor 10 is connected with the control end of discharge circuit 180 by the first photo-coupler 210, another I/O mouth 29 of microprocessor 10 is connected with the control end of charging circuit 190 by the 4th photo-coupler 240, described microprocessor 10 responds the 3rd look-at-me 19 and starts timing, microprocessor 10 responds the first look-at-me 21 or the second look-at-me 22 and to sample positive transient voltage or negative transient voltage stop timing from two counting mouths 26, and the first control signal 23 is exported to discharge circuit 180 by the first photo-coupler 210 after sampling terminates, export the second control signal 25 to charging circuit 190 by the 4th photo-coupler 240.The first diode 113 that the 5th resistance 111, first electric capacity 112 that described positive transition sample circuit 110 comprises series connection is mutually connected with forward; The first described sampling hold circuit 120 is made up of the second electric capacity 121; Described negative transition sample circuit 130 comprises the second diode 133 of the 6th resistance 131, the 3rd electric capacity 132 and the Opposite direction connection of connecting mutually; The second described sampling hold circuit 140 is made up of the 4th electric capacity 141.Described alternating current rising edge Acquisition Circuit 150 comprises the 3rd stabilivolt 152 being connected on the 7th resistance 151 between electrical network phase line 15 and electrical network center line 17 and Opposite direction connection successively, also comprise the first driving circuit 153, the input end of the first driving circuit 153 is connected with the link of the 3rd stabilivolt 152 with the 7th resistance 151 of alternating current rising edge Acquisition Circuit 150, and the output terminal of the first driving circuit 153 exports the 3rd look-at-me 19 by the 5th photo-coupler 250.Described positive transient detection circuit 160 comprise be connected on the 5th electric capacity 161 between electrical network phase line 15 with electrical network center line 17 successively, the 3rd diode 162 that forward is connected and the 8th resistance 163, also comprise the second driving circuit 164, the input end of the second driving circuit 164 is connected with the link of the 8th resistance 163 with the 3rd diode 162 of positive transient detection circuit 160, and the output terminal of the second driving circuit 164 exports the first look-at-me 21 by the 6th photo-coupler 260.Described negative transient detection circuit 170 comprises the first resistance 171, first stabilivolt 172 and the second stabilivolt 173 of differential concatenation, the 4th diode 174, second resistance 175 that the forward of connecting successively connects and the 3rd resistance 176,6th electric capacity 177 of connecting successively and the 4th resistance 178, and phase inverter 179; One end of the first described resistance 171 is connected on a constant pressure source 30; First stabilivolt 172 and the second stabilivolt 173 of described differential concatenation, one end of its series circuit is connected with the other end of the first resistance 171, and the other end of series circuit is connected with electrical network center line 17; The 4th diode 174, second resistance 175 that the described forward of connecting successively connects and the 3rd resistance 176, one end of its series circuit is connected with the other end of the first resistance 171, and the other end of series circuit is connected with electrical network center line 17; Described the 6th electric capacity 177 of connecting successively and the 4th resistance 178, one end of its series circuit is connected with electrical network phase line 15, and the other end of series circuit is connected with the link of the second resistance 175 and the 3rd resistance 176; One end of described phase inverter 179 is connected with the link of the second resistance 175 and the 3rd resistance 176, and the other end of phase inverter 179 exports the second look-at-me 22.Described clock chip 12 is connected with microprocessor 10, in order to real-time timing; Described nonvolatile memory 13 is connected with microprocessor 10.The first control signal 23 that described microprocessor 10 exports arrives ground by the 9th resistance 211 through the first photo-coupler elementary 212, and the first photo-coupler secondary 213 and the tenth resistance 214 are connected to the first sampling hold circuit 120; The second control signal 25 that described microprocessor 10 exports arrives ground by the 11 resistance 241 through the 4th photo-coupler elementary 242, and the 4th photo-coupler the secondary 243 and the 12 resistance 244 is connected to the second sampling hold circuit 140.The output of described alternating current rising edge Acquisition Circuit 150 is by the 5th photo-coupler elementary 252 and through the 13 resistance 251 to ground, the 5th photo-coupler the secondary 253 and the 14 resistance 254 exports the 3rd look-at-me 19 of microprocessor 10; The output of described positive transient detection circuit 160 is by the 6th photo-coupler elementary 262 and through the 15 resistance 261 to ground, the 6th photo-coupler the secondary 263 and the 16 resistance 264 exports the first look-at-me 21 of microprocessor 10; The output of described negative transient detection circuit 170 is by the 7th photo-coupler elementary 272 and through the 17 resistance 271 to ground, the 7th photo-coupler the secondary 273 and the 18 resistance 274 exports the second look-at-me 22 of microprocessor 10.One end of the first described sampling hold circuit 120 is connected with a V/F voltage to frequency converter 280, the frequency output terminal of the one V/F voltage to frequency converter 280 is by the second photo-coupler elementary 222 and through the 19 resistance 221 to ground, second photo-coupler secondary 223 is connected the counting mouth 26 of microprocessor 10 with the 20 resistance 224, positive transient voltage of sampling; One end of the second described sampling hold circuit 140 is connected with the 2nd V/F voltage to frequency converter 290, the frequency output terminal of the 2nd V/F voltage to frequency converter 290 is by the 3rd photo-coupler elementary 232 and through the 21 resistance 231 to ground, 3rd photo-coupler secondary 233 is connected the counting mouth 26 of microprocessor 10 with the 22 resistance 234, the negative transient voltage of sampling.
Embodiment 2:
With reference to the accompanying drawings 3 and 4, the structure of isolated form electric network transient inspecting device comprises positive transition sample circuit 110, first sampling hold circuit 120, negative transition sample circuit 130, second sampling hold circuit 140, alternating current rising edge Acquisition Circuit 150, positive transient detection circuit 160, negative transient detection circuit 170, discharge circuit 180, charging circuit 190, microprocessor 10, common drive circuit 11, clock chip 12, nonvolatile memory 13 and RS232 interface 14, the input end of described positive transition sample circuit 110 is connected with electrical network phase line 15, to sample positive transition 16 from electrical network phase line 15, to the positive transient voltage after its decay also output attenuatoin, one end of the first described sampling hold circuit 120 is connected with the output terminal of positive transition sample circuit 110, and the other end connects electrical network center line 17, for keeping the positive transient voltage after decaying, the input end of described negative transition sample circuit 130 is connected with electrical network phase line 15, samples bear transition 18 from electrical network phase line 15, to the negative transient voltage after its decay also output attenuatoin, one end of the second described sampling hold circuit 140 is connected with the output terminal of negative transition sample circuit 130, and the other end connects electrical network center line 17, for keeping the negative transient voltage after decaying, the input end of described alternating current rising edge Acquisition Circuit 150 is connected with electrical network phase line 15, for detecting alternating current rising edge and exporting the 3rd look-at-me 19 accordingly, the input end of described positive transient detection circuit 160 is connected with electrical network phase line 15, for responding positive transition 16, exports the first look-at-me 21 by the 6th photo-coupler 260, the input end of described negative transient detection circuit 170 is connected with electrical network phase line 15, for responding negative transition 18, exports the second look-at-me 22 by the 7th photo-coupler 270, between one end that described discharge circuit 180 is connected to the first sampling hold circuit 120 and electrical network center line 17, receive the first control signal 23 by the first photo-coupler 210 and the first sampling hold circuit 120 is discharged, between one end that described charging circuit 190 is connected to the second sampling hold circuit 140 and positive voltage source 24, receive the second control signal 25 by the 4th photo-coupler 240 and the second sampling hold circuit 140 is charged, one counting mouth 26 of described microprocessor 10 is connected with one end of a V/F voltage to frequency converter 280 of the first sampling hold circuit 120 by the second photo-coupler 220, another counting mouth 26 of microprocessor 10 is connected with one end of the 2nd V/F voltage to frequency converter 290 of the second sampling hold circuit 140 by the 3rd photo-coupler 230, microprocessor 10 one in fracture 28 be connected with the output terminal of shared driving circuit 11 by the 6th photo-coupler 260, in another of microprocessor 10, fracture 28 is connected with the output terminal of negative transient detection circuit 170 by the 7th photo-coupler 270, one I/O mouth 29 of microprocessor 10 is connected with the control end of discharge circuit 180 by the first photo-coupler 210, another I/O mouth 29 of microprocessor 10 is connected with the control end of charging circuit 190 by the 4th photo-coupler 240, described microprocessor 10 responds the 3rd look-at-me 19 and starts timing, microprocessor 10 responds the first look-at-me 21 or the second look-at-me 22 and to sample positive transient voltage or negative transient voltage stop timing from two counting mouths 26, and the first control signal 23 is exported to discharge circuit 180 by the first photo-coupler 210 after sampling terminates, export the second control signal 25 to charging circuit 190 by the 4th photo-coupler 240.The first diode 113 that the 5th resistance 111, first electric capacity 112 that described positive transition sample circuit 110 comprises series connection is mutually connected with forward; The first described sampling hold circuit 120 is made up of the second electric capacity 121; Described negative transition sample circuit 130 comprises the second diode 133 of the 6th resistance 131, the 3rd electric capacity 132 and the Opposite direction connection of connecting mutually; The second described sampling hold circuit 140 is made up of the 4th electric capacity 141.Described alternating current rising edge Acquisition Circuit 150 comprises the 3rd stabilivolt 152 being connected on the 7th resistance 151 between electrical network phase line 15 and electrical network center line 17 and Opposite direction connection successively.Described positive transient detection circuit 160 comprise be connected on the 5th electric capacity 161 between electrical network phase line 15 with electrical network center line 17 successively, the 3rd diode 162 that forward is connected and the 8th resistance 163.Described common drive circuit 11 is XOR circuit, one input end of common drive circuit 11 is connected with the link of the 3rd stabilivolt 152 with the 7th resistance 151 of alternating current rising edge Acquisition Circuit 150, another input end of common drive circuit 11 is connected with the link of the 8th resistance 163 with the 3rd diode 162 of positive transient detection circuit 160, and the output terminal of common drive circuit 11 exports the 3rd look-at-me 19 and the first look-at-me 21 by the 6th photo-coupler 260.Described negative transient detection circuit 170 comprises the first resistance 171, first stabilivolt 172 and the second stabilivolt 173 of differential concatenation, the 4th diode 174, second resistance 175 that the forward of connecting successively connects and the 3rd resistance 176,6th electric capacity 177 of connecting successively and the 4th resistance 178, and phase inverter 179; One end of the first described resistance 171 is connected on a constant pressure source 30; First stabilivolt 172 and the second stabilivolt 173 of described differential concatenation, one end of its series circuit is connected with the other end of the first resistance 171, and the other end of series circuit is connected with electrical network center line 17; The 4th diode 174, second resistance 175 that the described forward of connecting successively connects and the 3rd resistance 176, one end of its series circuit is connected with the other end of the first resistance 171, and the other end of series circuit is connected with electrical network center line 17; Described the 6th electric capacity 177 of connecting successively and the 4th resistance 178, one end of its series circuit is connected with electrical network phase line 15, and the other end of series circuit is connected with the link of the second resistance 175 and the 3rd resistance 176; One end of described phase inverter 179 is connected with the link of the second resistance 175 and the 3rd resistance 176, and the other end of phase inverter 179 exports the second look-at-me 22.Described clock chip 12 is connected with microprocessor 10, in order to real-time timing; Described nonvolatile memory 13 is connected with microprocessor 10.The first control signal 23 that described microprocessor 10 exports arrives ground by the 9th resistance 211 through the first photo-coupler elementary 212, and the first photo-coupler secondary 213 and the tenth resistance 214 are connected to the first sampling hold circuit 120; The second control signal 25 that described microprocessor 10 exports arrives ground by the 11 resistance 241 through the 4th photo-coupler elementary 242, and the 4th photo-coupler the secondary 243 and the 12 resistance 244 is connected to the second sampling hold circuit 140.The output of described common drive circuit 11 is by the 6th photo-coupler elementary 262 and through the 15 resistance 261 to ground, the 6th photo-coupler the secondary 263 and the 16 resistance 264 exports the 3rd look-at-me 19 and the first look-at-me 21 of microprocessor 10; The output of described negative transient detection circuit 170 is by the 7th photo-coupler elementary 272 and through the 17 resistance 271 to ground, the 7th photo-coupler the secondary 273 and the 18 resistance 274 exports the second look-at-me 22 of microprocessor 10.One end of the first described sampling hold circuit 120 is connected with a V/F voltage to frequency converter 280, the frequency output terminal of the one V/F voltage to frequency converter 280 is by the second photo-coupler elementary 222 and through the 19 resistance 221 to ground, second photo-coupler secondary 223 is connected the counting mouth 26 of microprocessor 10 with the 20 resistance 224, positive transient voltage of sampling; One end of the second described sampling hold circuit 140 is connected with the 2nd V/F voltage to frequency converter 290, the frequency output terminal of the 2nd V/F voltage to frequency converter 290 is by the 3rd photo-coupler elementary 232 and through the 21 resistance 231 to ground, 3rd photo-coupler secondary 233 is connected the counting mouth 26 of microprocessor 10 with the 22 resistance 234, the negative transient voltage of sampling.
With simple circuit realiration, the grid transient that pulsewidth is little, amplitude is high detects the utility model, solves the defect that electric energy quality detection device for a long time can not detect this very important parameter of grid transient.The utility model have recorded polarity, amplitude, the phase angle of grid transient, and the parameters such as time of origin, for analysis, provide scientific basis for improving power grid quality.The utility model uses photo-coupler that grid transient detection is isolated with microprocessor and data network, greatly reduce grid transient pulse to the impact of microprocessor and interference, improve the operational reliability of microprocessor, simultaneously, photo-coupler has been isolated the circuit between electrical network and microprocessor and has been contacted, and makes microprocessor can accessing Internet by RS232 interface.
Claims (10)
1. an isolated form electric network transient inspecting device, comprise positive transition sample circuit, first sampling hold circuit, negative transition sample circuit, second sampling hold circuit, alternating current rising edge Acquisition Circuit, positive transient detection circuit, negative transient detection circuit, discharge circuit, charging circuit, microprocessor, common drive circuit, clock chip, nonvolatile memory and RS232 interface, is characterized in that: the input end of described positive transition sample circuit is connected with electrical network phase line, to sample positive transition from electrical network phase line, the positive transient voltage to its decay and after output attenuatoin; One end of the first described sampling hold circuit is connected with the output terminal of positive transition sample circuit, and the other end connects electrical network center line, for keeping the positive transient voltage after decaying; The input end of described negative transition sample circuit is connected with electrical network phase line, from the negative transition of electrical network phase line sampling, to the negative transient voltage after its decay also output attenuatoin; One end of the second described sampling hold circuit is connected with the output terminal of negative transition sample circuit, and the other end connects electrical network center line, for keeping the negative transient voltage after decaying; The input end of described alternating current rising edge Acquisition Circuit is connected with electrical network phase line, for detecting alternating current rising edge and exporting the 3rd look-at-me accordingly; The input end of described positive transient detection circuit is connected with electrical network phase line, for responding positive transition, exports the first look-at-me by photo-coupler; The input end of described negative transient detection circuit is connected with electrical network phase line, for responding negative transition, exports the second look-at-me by photo-coupler; Described discharge circuit is connected between one end of the first sampling hold circuit and electrical network center line, receives the first control signal and discharge to the first sampling hold circuit by photo-coupler; Between one end that described charging circuit is connected to the second sampling hold circuit and positive voltage source, receive the second control signal by photo-coupler and the second sampling hold circuit is charged; Two counting mouths of described microprocessor are connected with one end of one end of the V/F voltage to frequency converter of the first sampling hold circuit and the V/F voltage to frequency converter of the second sampling hold circuit respectively by two photo-couplers, the middle fracture of microprocessor is connected with the output terminal of alternating current rising edge Acquisition Circuit, positive transient detection circuit and negative transient detection circuit respectively by photo-coupler, and the I/O mouth of microprocessor is connected with the control end of discharge circuit and charging circuit respectively by two photo-couplers; Described microprocessor responds the 3rd look-at-me and start timing, microprocessor responds first look-at-me or the second look-at-me and to sample positive transient voltage or negative transient voltage stop timing from two counting mouths, and the first control signal or the second control signal is exported to discharge circuit or charging circuit by photo-coupler after sampling terminates.
2. isolated form electric network transient inspecting device according to claim 1, is characterized in that: the diode that described positive transition sample circuit comprises a resistance of mutually series connection, an electric capacity is connected with a forward; The first described sampling hold circuit is made up of electric capacity; Described negative transition sample circuit comprises the diode of a resistance, an electric capacity and an Opposite direction connection of connecting mutually; The second described sampling hold circuit is made up of electric capacity.
3. isolated form electric network transient inspecting device according to claim 1, it is characterized in that: described alternating current rising edge Acquisition Circuit comprises the stabilivolt being connected on a resistance between electrical network phase line and electrical network center line and an Opposite direction connection successively, also comprise one first driving circuit, the input end of the first driving circuit is connected with the link of stabilivolt with the resistance of alternating current rising edge Acquisition Circuit, and the output terminal of the first driving circuit exports the 3rd look-at-me by photo-coupler.
4. isolated form electric network transient inspecting device according to claim 1, it is characterized in that: described positive transient detection circuit comprise be connected on an electric capacity between electrical network phase line with electrical network center line successively, diode that a forward is connected and a resistance, also comprise one second driving circuit, the input end of the second driving circuit is connected with the link of resistance with the positive diode of transient detection circuit, and the output terminal of the second driving circuit exports the first look-at-me by photo-coupler.
5. the isolated form electric network transient inspecting device according to claim 1,3 or 4, it is characterized in that: described common drive circuit is XOR circuit, one input end of common drive circuit is connected with the link of stabilivolt with the resistance of alternating current rising edge Acquisition Circuit, another input end of common drive circuit is connected with the link of resistance with the positive diode of transient detection circuit, and the output terminal of common drive circuit exports the 3rd look-at-me and the first look-at-me by photo-coupler.
6. isolated form electric network transient inspecting device according to claim 1, it is characterized in that: described negative transient detection circuit comprises the first resistance, first stabilivolt of differential concatenation and the second stabilivolt, the diode that the forward of connecting successively connects, the second resistance and the 3rd resistance, the electric capacity of connecting successively and the 4th resistance, and phase inverter; One end of the first described resistance is connected on a constant pressure source; First stabilivolt of described differential concatenation and the second stabilivolt, one end of its series circuit is connected with the other end of the first resistance, and the other end of series circuit is connected with electrical network center line; The diode that the described forward of connecting successively connects, the second resistance and the 3rd resistance, one end of its series circuit is connected with the other end of the first resistance, and the other end of series circuit is connected with electrical network center line; The described electric capacity of connecting successively and the 4th resistance, one end of its series circuit is connected with electrical network phase line, and the other end of series circuit is connected with the link of the second resistance and the 3rd resistance; One end of described phase inverter is connected with the link of the second resistance and the 3rd resistance, and the other end of phase inverter exports the second look-at-me.
7. isolated form electric network transient inspecting device according to claim 1, is characterized in that: described clock chip is connected with microprocessor, in order to real-time timing; Described nonvolatile memory is connected with microprocessor.
8. isolated form electric network transient inspecting device according to claim 1, is characterized in that: the first control signal that described microprocessor exports is elementary to ground through photo-coupler by resistance, and photo-coupler is secondary is connected to the first sampling hold circuit with resistance; The second control signal that described microprocessor exports is elementary to ground through photo-coupler by resistance, and photo-coupler is secondary is connected to the second sampling hold circuit with resistance.
9. isolated form electric network transient inspecting device according to claim 1, it is characterized in that: the output of described alternating current rising edge Acquisition Circuit is elementary and through resistance to ground by photo-coupler, secondary the 3rd look-at-me exporting microprocessor with resistance of photo-coupler; The output of described positive transient detection circuit is elementary and through resistance to ground by photo-coupler, secondary the first look-at-me exporting microprocessor with resistance of photo-coupler; The output of described negative transient detection circuit is elementary and through resistance to ground by photo-coupler, secondary the second look-at-me exporting microprocessor with resistance of photo-coupler.
10. isolated form electric network transient inspecting device according to claim 1, it is characterized in that: one end of the first described sampling hold circuit is connected with V/F voltage to frequency converter, the frequency output terminal of V/F voltage to frequency converter by photo-coupler elementary and through resistance to, the secondary counting mouth being connected microprocessor with resistance of photo-coupler, positive transient voltage of sampling; One end of the second described sampling hold circuit is connected with V/F voltage to frequency converter, the frequency output terminal of V/F voltage to frequency converter by photo-coupler elementary and through resistance to, the secondary counting mouth being connected microprocessor with resistance of photo-coupler, the negative transient voltage of sampling.
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| CN201520908906.3U CN205139275U (en) | 2015-11-16 | 2015-11-16 | Isolated form electric wire netting transition detection device |
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| CN201520908906.3U CN205139275U (en) | 2015-11-16 | 2015-11-16 | Isolated form electric wire netting transition detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109212303A (en) * | 2018-10-22 | 2019-01-15 | 大禹电气科技股份有限公司 | Digital signal samples processing circuit for high-voltage frequency converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109212303A (en) * | 2018-10-22 | 2019-01-15 | 大禹电气科技股份有限公司 | Digital signal samples processing circuit for high-voltage frequency converter |
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