CN102087352A - Three-phase intelligent watt-hour meter inspection device and method - Google Patents
Three-phase intelligent watt-hour meter inspection device and method Download PDFInfo
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Abstract
The invention relates to a watt-hour meter inspection device and method, in particular relating to a three-phase intelligent watt-hour meter inspection device and method. The existing watt-hour inspection device has long inspection time, and needs an extra instrument for inspecting the power consumption of a watt-hour meter; the existing watt-hour meter inspection device has low efficiency and can inspect only one watt-hour meter for one time; and in addition, the existing watt-hour meter inspection device is inability of testing the cost-control trip of the intelligent watt-hour meter. The three-phase intelligent watt-hour meter inspection device comprises a standard clock, a three-phase program-controlled source, a standard watt-hour meter, error calculators, power consumption testers and a communication module. The inspection device provided by the invention is characterized by comprising trip monitoring units, wherein the inspection device has a plurality of testing work positions; one power consumption tester, one trip monitoring unit and one error calculator are arranged on each testing work position; each error calculator is provided with a counting calculation module; and the standard watt-hour meter is used for metering an output module. The three-phase intelligent watt-hour meter inspection device is rapid in inspecting watt-hour meters, and can inspect the power consumption and the cost-control trip.
Description
Technical field
The present invention relates to a kind of calibrator for watt-hour meter and method.
Background technology
In intelligent grid, intelligent electric energy meter has been endowed a lot of new functions, has important effect at present.According to the technical manual of three-phase intelligent electric energy meter, need test to its active energy error in dipping, reactive energy error in dipping, clocking error, and will examine, but also will test expense control function to the power consumption of himself.
Common calibrator for watt-hour meter is that serial is carried out for the meritorious error-tested of electric energy meter, idle error-tested, clock accuracy check, and proving time is long; For the check of electric energy meter power consumption, need to use extra instrument, can only check an electric energy meter, inefficiency at every turn; For intelligent electric energy meter to take the control trip test powerless.
Summary of the invention
The technical assignment of the technical problem to be solved in the present invention and proposition is that the prior art scheme is improved and improved, and a kind of three-phase intelligent calibrator for watt-hour meter and method are provided, and is quick to reach test of kilo watthour meter, can check the purpose of power consumption and expense control tripping operation simultaneously.For this reason, the present invention takes following technical scheme:
The three-phase intelligent calibrator for watt-hour meter comprises computing machine, is used for installing check software with control test equipment and handle testing result; The standard time clock instrument is used to take place the time clock of constant frequency; The program control source of three-phase is for standard electric energy meter and tested electric energy meter provide three-phase current and voltage; Standard electric energy meter, for tested electric energy meter with reference to electric energy meter; Error Calculator is used for calculating according to standard electric energy meter and standard time clock instrument the error of tested electric energy meter; The power consumption test instrument, the power consumption that is used to test tested table; Communication module is used to realize communicating to connect between computing machine and equipment, the tested electric energy meter, it is characterized in that: verifying attachment also comprises can monitor the trip signal and the tripping operation monitoring means of short circuit test station current return automatically; Verifying attachment is provided with a plurality of test station, and each test station is established a power consumption test instrument, a tripping operation monitoring means and an Error Calculator; Described Error Calculator is provided with the counting computing module that can count and calculate simultaneously three road high-frequency impulses, three road low-frequency pulses of input simultaneously; Described standard electric energy meter is provided with and can measures active energy and reactive energy simultaneously and export the metering output module of active energy pulse and reactive energy pulse simultaneously.Standard electric energy meter can be exported active energy pulse and reactive energy pulse simultaneously, and Error Calculator can be counted simultaneously to three group pulses of input, Error Calculation, improve detection speed, solve traditional calibrator for watt-hour meter for routine inspection projects such as the meritorious/reactive energy error in dipping of three-phase intelligent electric energy meter and clocking error can only check item by item, the problem of inefficiency.And solve a power consumption test difficult problem, and increase tripping operation monitoring check, improve inspection item, each test station is used to test an electric energy meter, establishes a plurality of test station and can check simultaneously a plurality of electric energy meters, saves proving time.
As the further of technique scheme improved and replenish, the present invention also comprises following additional technical feature:
Described tripping operation detecting unit is established the automatic short circuit functional module that is used to detect built-in relay tripping operation measuring ability module, the external relay tripping operation measuring ability module of current open and is used for current open is carried out short circuit.When detecting, the test side of built-in relay tripping operation measuring ability module and the three-phase current incoming line of tested electric energy meter are connected in parallel, and the test side of external relay tripping operation measuring ability module is connected with the tripping operation control signal output ends of tested electric energy meter.
The applied power that described power consumption test unit is provided with the active power test module and the reactive power test module that are used to detect tested electric energy meter every phase voltage input circuit active power and reactive power, be used to detect the applied power consumption of the every phase current input circuit of tested electric energy meter consumes test module and is used to calculate the total active power of tested electrical energy meter electricity hydraulic circuit and applied power consumption, the total applied power power consumed test computing module of current return.
Described communication module comprises devices communicating bus and electric energy meter communication bus, computing machine links to each other by the program control source of devices communicating bus and three-phase, standard electric energy meter, Error Calculator, power consumption test unit, tripping operation detecting unit and makes computing machine communicate control and test result is passed to computing machine checkout equipment by the devices communicating bus, and computing machine links to each other with tested electric energy meter by the electric energy meter communication bus.
The program control source of three-phase is provided with communication interface and is connected three-phase voltage and angle between the amplitude of three-phase current, any phase voltage and the electric current and the angle between the three-phase voltage that the program control source output of computer control three-phase is set with the computing machine communication.
Three-phase intelligent test of kilo watthour meter method is characterized in that it may further comprise the steps:
1) verifying attachment and tested electric energy meter Connection Step, the program control source output of three-phase three-phase voltage, three-phase current insert standard electric energy meter and many tested electric energy meters, Voltage Series, current parallel; The Error Calculator of corresponding test station is received in the active energy pulse output of tested electric energy meter, reactive energy pulse output and time clock output simultaneously; The meritorious pulse input end of the standard of Error Calculator links to each other with the meritorious pulse output end of standard electric energy meter, and the idle pulse input end of standard links to each other with the idle pulse output end of standard electric energy meter, and the standard time clock pulse input end links to each other with the output terminal of standard time clock; The power consumption test instrument links to each other Voltage Series, current parallel with voltage, the current terminal of the tested electric energy meter of corresponding test station; Computing machine is connected to the PORT COM of the program control source of three-phase, standard electric energy meter, Error Calculator, power consumption test unit by the devices communicating bus; Computing machine is connected to each tested electric energy meter by the ammeter communication bus;
2) electric energy meter error testing procedure, computing machine sends the instruction that contains three-phase voltage, electric current, phase value by the devices communicating bus to program control source, the specific voltage and current of program control source output, standard electric energy meter measures and exports simultaneously active energy pulse, reactive energy pulse simultaneously to active energy, reactive energy, the pulse of tested electric energy meter output active energy, reactive energy pulse, time clock, standard time clock sends the standard time clock pulse signal; Computing machine sends the instruction that contains the presetting pulse number by the devices communicating bus to Error Calculator, Error Calculator begins three road high-frequency impulses and three road low-frequency pulses of input are simultaneously counted the also error of calculation simultaneously after receiving instruction, and result of calculation comprises meritorious electric energy error value, reactive energy error amount, clocking error value; Counter control software reads the error result data by the devices communicating bus from Error Calculator;
3) electric energy meter power consumption test step, computing machine sends the instruction that starts test by the devices communicating bus to the power consumption test unit; The active power and the applied power consumption of the every phase voltage input circuit of the tested electric energy meter of electric energy meter power consumption test unit testing, total active power of tested electrical energy meter electricity hydraulic circuit and applied power consumption, the total applied power consumption of current return are calculated in the applied power consumption of the every phase current input circuit of tested electric energy meter; Computing machine reads the power consumption test value by the devices communicating bus from the power consumption test unit.
The test of kilo watthour meter method also comprises electric energy meter expense control tripping operation testing procedure, before electric energy meter expense control tripping operation testing procedure, need the built-in relay tripping operation test side of tripping operation detecting unit and the three-phase current incoming line of tested electric energy meter are connected in parallel, or external relay tripping operation test side is connected to the tripping operation control signal output ends of tested electric energy meter; When electric energy meter took control tripping operation test, computing machine sent instruction by the devices communicating bus to the tripping operation detecting unit; The tripping operation detecting unit switches to the relevant detection passage according to the instruction of computing machine, begins tripping operation and detects; If tested electric energy meter is long-range expense control intelligent electric energy meter, computing machine sends trip command by the ammeter communication bus to it, the tripping operation of order electric energy meter; If tested electric energy meter is local expense control electric energy meter, the program control source of computer control keeps power output always, presets the electricity charge in tested electric energy meter exhausts table, trips; When the tripping operation detecting unit detects the tripping operation of built-in relay, the current return of the corresponding test station of short circuit at once; Computing machine reads the tripping operation testing result by the devices communicating bus from the tripping operation detecting unit; Computing machine sends to tested electric energy meter by the ammeter communication bus and supplements instruction with money, perhaps supplements with money by artificial plug-in card, and compounding practice personnel's operation makes tested electric energy meter generation feed motion; Computing machine reads the combined floodgate testing result by the devices communicating bus from the tripping operation detecting unit.
The tripping operation control signal that external relay tripping operation inserts when detecting is 220V interchange, pulse or level.
Pulse of high frequency active energy and reactive energy pulsed frequency that the three-phase standard electric energy meter is exported simultaneously are not less than 1000Hz; The clock frequency of described standard time clock instrument generation constant frequency is not less than 1MHz.
Error Calculator is calculated three group pulse signal errorss, and wherein the error amount resolution that calculates of two group pulses is not less than 0.0001%, and the error amount resolution that another group pulse calculates is not less than 0.00005%.
The invention has the beneficial effects as follows: can measure active energy error, the reactive energy sum of errors clocking error of three-phase intelligent electric energy meter simultaneously, improve the checkability of intelligent electric energy meter; The three-phase voltage loop active power that can measure intelligent electric energy meter consumes and applied power consumption, can measure the applied power consumption of three-phase current loop, solves a power consumption test difficult problem; But loading current carries out the trip test of built-in relay intelligent electric energy meter, can carry out the trip test of external relay intelligent electric energy meter, external tripping operation control signal can be pulse, level signal or alternating current 220V, solve built-in/external relay intelligent electric energy meter trip test problem simultaneously, solved the detection problem of the dissimilar tripping operation control signals of external relay intelligent electric energy meter especially.
Description of drawings
Fig. 1 is a theory diagram of the present invention.
Embodiment
Below in conjunction with Figure of description technical scheme of the present invention is described in further detail.
The present invention includes computing machine, be used for installing check software with control test equipment and handle testing result; The standard time clock instrument is used to take place the time clock of constant frequency; The program control source of three-phase is for standard electric energy meter and tested electric energy meter provide three-phase current and voltage; Standard electric energy meter, for tested electric energy meter with reference to electric energy meter; Error Calculator is used for calculating according to standard electric energy meter and standard time clock instrument the error of tested electric energy meter; The power consumption test instrument, the power consumption that is used to test tested table; Communication module is used to realize communicating to connect between computing machine and equipment, the tested electric energy meter; The tripping operation monitoring means is used to monitor trip signal and automatic short circuit test station current return; Verifying attachment is provided with a plurality of test station, and each test station is established a power consumption test instrument, a tripping operation monitoring means and an Error Calculator; The Error Calculator of described Error Calculator for counting and calculate simultaneously three road high-frequency impulses, three road low-frequency pulses of input simultaneously; Described standard electric energy meter is for measuring active energy and reactive energy simultaneously and exporting the standard electric energy meter of active energy pulse and reactive energy pulse simultaneously.The tripping operation detecting unit is established the automatic short circuit functional module that is used to detect built-in relay tripping operation measuring ability module, the external relay tripping operation measuring ability module of current open and is used for current open is carried out short circuit.The applied power that the power consumption test unit is provided with the active power test module and the reactive power test module that are used to detect tested electric energy meter every phase voltage input circuit active power and reactive power, be used to detect the applied power consumption of the every phase current input circuit of tested electric energy meter consumes test module and is used to calculate the total active power of tested electrical energy meter electricity hydraulic circuit and applied power consumption, the total applied power power consumed test computing module of current return.Communication module comprises devices communicating bus and electric energy meter communication bus, computing machine links to each other by the program control source of devices communicating bus and three-phase, standard electric energy meter, Error Calculator, power consumption test unit, tripping operation detecting unit and makes computing machine communicate control and test result is passed to computing machine checkout equipment by the devices communicating bus, and computing machine links to each other with tested electric energy meter by the electric energy meter communication bus.The program control source of three-phase is provided with communication interface and is connected three-phase voltage and angle between the amplitude of three-phase current, any phase voltage and the electric current and the angle between the three-phase voltage that the program control source output of computer control three-phase is set with the computing machine communication.
Three-phase intelligent test of kilo watthour meter method may further comprise the steps:
1) checkout equipment and tested electric energy meter Connection Step, prepare the program control source of three-phase 1 cover, 1 of standard time clock has active energy pulse/reactive energy pulse 1 of the standard electric energy meter of output function simultaneously, and having three road high frequencies/three road low frequencies, to import the Error Calculator N(N of computing function simultaneously be the test station number, it can be any positive integer, as 16,24 etc.) individual, power consumption test unit N, N of tripping operation detecting unit, 2 groups of RS485 communication buss, one in the computing machine of installation and measuring software.The program control source output of three-phase three-phase voltage, three-phase current insert standard electric energy meter and many tested electric energy meters, Voltage Series, current parallel.The Error Calculator of corresponding test station is received in the active energy pulse output of tested electric energy meter, reactive energy pulse output and time clock output simultaneously.The meritorious pulse input end of the standard of Error Calculator links to each other with the meritorious pulse output end of standard scale, and the idle pulse input end of standard links to each other with the idle pulse output end of standard scale, and the standard time clock pulse input end links to each other with the output terminal of standard time clock.The power consumption test instrument links to each other Voltage Series, current parallel with voltage, the current terminal of the tested electric energy meter of corresponding test station.The built-in relay tripping operation test side of tripping operation detecting unit and the three-phase current incoming line of tested electric energy meter are connected in parallel, and external relay tripping operation test side is connected to the tripping operation control signal output ends of tested electric energy meter; Control computer is connected to the PORT COM of the program control source of three-phase, standard electric energy meter, Error Calculator, power consumption test unit, tripping operation detecting unit by the devices communicating bus; Control computer is connected to each tested electric energy meter by the ammeter communication bus.
2) electric energy meter error testing procedure, computing machine sends the instruction that contains three-phase voltage, electric current, phase value by the devices communicating bus to program control source, the specific voltage and current of program control source output, standard electric energy meter measures and exports simultaneously active energy pulse, reactive energy pulse simultaneously to active energy, reactive energy, the pulse of tested electric energy meter output active energy, reactive energy pulse, time clock, standard time clock sends the standard time clock pulse signal; Computing machine sends the instruction that contains the presetting pulse number by the devices communicating bus to Error Calculator, Error Calculator begins three road high-frequency impulses and three road low-frequency pulses of input are simultaneously counted the also error of calculation simultaneously after receiving instruction, and result of calculation comprises meritorious electric energy error value, reactive energy error amount, clocking error value; Counter control software reads the error result data by the devices communicating bus from Error Calculator.
3) electric energy meter power consumption test step, computing machine sends the instruction that starts test by the devices communicating bus to the power consumption test unit; The active power and the applied power consumption of the every phase voltage input circuit of the tested electric energy meter of electric energy meter power consumption test unit testing, total active power of tested electrical energy meter electricity hydraulic circuit and applied power consumption, the total applied power consumption of current return are calculated in the applied power consumption of the every phase current input circuit of tested electric energy meter; Computing machine reads the power consumption test value by the devices communicating bus from the power consumption test unit.
4) electric energy meter takes control tripping operation testing procedure, before electric energy meter expense control tripping operation testing procedure, need the built-in relay tripping operation test side of tripping operation detecting unit and the three-phase current incoming line of tested electric energy meter are connected in parallel, or external relay tripping operation test side is connected to the tripping operation control signal output ends of tested electric energy meter; When electric energy meter took control tripping operation test, computing machine sent instruction by the devices communicating bus to the tripping operation detecting unit; The tripping operation detecting unit switches to the relevant detection passage according to the instruction of computing machine, begins tripping operation and detects; If tested electric energy meter is long-range expense control intelligent electric energy meter, computing machine sends trip command by the ammeter communication bus to it, the tripping operation of order electric energy meter; If tested electric energy meter is local expense control electric energy meter, the program control source of computer control keeps power output always, presets the electricity charge in tested electric energy meter exhausts table, trips; When the tripping operation detecting unit detects the tripping operation of built-in relay, the current return of the corresponding test station of short circuit at once; Computing machine reads the tripping operation testing result by the devices communicating bus from the tripping operation detecting unit; Computing machine sends to tested electric energy meter by the ammeter communication bus and supplements instruction with money, perhaps supplements with money by artificial plug-in card, and compounding practice personnel's operation makes tested electric energy meter generation feed motion; Computing machine reads the combined floodgate testing result by the devices communicating bus from the tripping operation detecting unit.
In order to match with various electric energy meters, the tripping operation control signal that external relay tripping operation inserts when detecting is 220V interchange, pulse or level.
For improving accuracy of detection, pulse of high frequency active energy and reactive energy pulsed frequency that the three-phase standard electric energy meter is exported simultaneously are not less than 1000Hz; The clock frequency of standard time clock instrument generation constant frequency is not less than 1MHz.Error Calculator is calculated three group pulse signal errorss, and wherein the error amount resolution that calculates of two group pulses is not less than 0.0001%, and the error amount resolution that another group pulse calculates is not less than 0.00005%.
Claims (10)
1. the three-phase intelligent calibrator for watt-hour meter comprises computing machine, is used for installing check software with control test equipment and handle testing result; The standard time clock instrument is used to take place the time clock of constant frequency; The program control source of three-phase is for standard electric energy meter and tested electric energy meter provide three-phase current and voltage; Standard electric energy meter, for tested electric energy meter with reference to electric energy meter; Error Calculator is used for calculating according to standard electric energy meter and standard time clock instrument the error of tested electric energy meter; The power consumption test instrument, the power consumption that is used to test tested table; Communication module is used to realize communicating to connect between computing machine and equipment, the tested electric energy meter, it is characterized in that: verifying attachment also comprises can monitor the trip signal and the tripping operation monitoring means of short circuit test station current return automatically; Verifying attachment is provided with a plurality of test station, and each test station is established a power consumption test instrument, a tripping operation monitoring means and an Error Calculator; Described Error Calculator is provided with the counting computing module that can count and calculate simultaneously three road high-frequency impulses, three road low-frequency pulses of input simultaneously; Described standard electric energy meter is provided with and can measures active energy and reactive energy simultaneously and export the metering output module of active energy pulse and reactive energy pulse simultaneously.
2. three-phase intelligent calibrator for watt-hour meter according to claim 1 is characterized in that: described tripping operation detecting unit is established the automatic short circuit functional module that is used to detect built-in relay tripping operation measuring ability module, the external relay tripping operation measuring ability module of current open and is used for current open is carried out short circuit.
3. three-phase intelligent calibrator for watt-hour meter according to claim 1 is characterized in that: the applied power that described power consumption test unit is provided with the active power test module and the reactive power test module that are used to detect tested electric energy meter every phase voltage input circuit active power and reactive power, be used to detect the applied power consumption of the every phase current input circuit of tested electric energy meter consumes test module and is used to calculate the total active power of tested electrical energy meter electricity hydraulic circuit and applied power consumption, the total applied power power consumed test computing module of current return.
4. according to claim 1 or 2 or 3 described three-phase intelligent calibrator for watt-hour meter, it is characterized in that: described communication module comprises devices communicating bus and electric energy meter communication bus, computing machine links to each other by the program control source of devices communicating bus and three-phase, standard electric energy meter, Error Calculator, power consumption test unit, tripping operation detecting unit and makes computing machine communicate control and test result is passed to computing machine checkout equipment by the devices communicating bus, and computing machine links to each other with tested electric energy meter by the electric energy meter communication bus.
5. three-phase intelligent calibrator for watt-hour meter according to claim 4 is characterized in that: the program control source of three-phase is provided with communication interface and is connected three-phase voltage and angle between the amplitude of three-phase current, any phase voltage and the electric current and the angle between the three-phase voltage that the program control source output of computer control three-phase is set with the computing machine communication.
6. three-phase intelligent test of kilo watthour meter method according to claim 1 is characterized in that it may further comprise the steps:
1) verifying attachment and tested electric energy meter Connection Step, the program control source output of three-phase three-phase voltage, three-phase current insert standard electric energy meter and many tested electric energy meters, Voltage Series, current parallel; The Error Calculator of corresponding test station is received in the active energy pulse output of tested electric energy meter, reactive energy pulse output and time clock output simultaneously; The meritorious pulse input end of the standard of Error Calculator links to each other with the meritorious pulse output end of standard electric energy meter, and the idle pulse input end of standard links to each other with the idle pulse output end of standard electric energy meter, and the standard time clock pulse input end links to each other with the output terminal of standard time clock; The power consumption test instrument links to each other Voltage Series, current parallel with voltage, the current terminal of the tested electric energy meter of corresponding test station; Computing machine is connected to the PORT COM of the program control source of three-phase, standard electric energy meter, Error Calculator, power consumption test unit by the devices communicating bus; Computing machine is connected to each tested electric energy meter by the ammeter communication bus;
2) electric energy meter error testing procedure, computing machine sends the instruction that contains three-phase voltage, electric current, phase value by the devices communicating bus to program control source, the specific voltage and current of program control source output, standard electric energy meter measures and exports simultaneously active energy pulse, reactive energy pulse simultaneously to active energy, reactive energy, the pulse of tested electric energy meter output active energy, reactive energy pulse, time clock, standard time clock sends the standard time clock pulse signal; Computing machine sends the instruction that contains the presetting pulse number by the devices communicating bus to Error Calculator, Error Calculator begins three road high-frequency impulses and three road low-frequency pulses of input are simultaneously counted the also error of calculation simultaneously after receiving instruction, and result of calculation comprises meritorious electric energy error value, reactive energy error amount, clocking error value; Counter control software reads the error result data by the devices communicating bus from Error Calculator;
3) electric energy meter power consumption test step, computing machine sends the instruction that starts test by the devices communicating bus to the power consumption test unit; The active power and the applied power consumption of the every phase voltage input circuit of the tested electric energy meter of electric energy meter power consumption test unit testing, total active power of tested electrical energy meter electricity hydraulic circuit and applied power consumption, the total applied power consumption of current return are calculated in the applied power consumption of the every phase current input circuit of tested electric energy meter; Computing machine reads the power consumption test value by the devices communicating bus from the power consumption test unit.
7. three-phase intelligent test of kilo watthour meter method according to claim 6, it is characterized in that: the test of kilo watthour meter method also comprises electric energy meter expense control tripping operation testing procedure, before electric energy meter expense control tripping operation testing procedure, need the built-in relay tripping operation test side of tripping operation detecting unit and the three-phase current incoming line of tested electric energy meter are connected in parallel, or external relay tripping operation test side is connected to the tripping operation control signal output ends of tested electric energy meter; When electric energy meter took control tripping operation test, computing machine sent instruction by the devices communicating bus to the tripping operation detecting unit; The tripping operation detecting unit switches to the relevant detection passage according to the instruction of computing machine, begins tripping operation and detects; If tested electric energy meter is long-range expense control intelligent electric energy meter, computing machine sends trip command by the ammeter communication bus to it, the tripping operation of order electric energy meter; If tested electric energy meter is local expense control electric energy meter, the program control source of computer control keeps power output always, presets the electricity charge in tested electric energy meter exhausts table, trips; When the tripping operation detecting unit detects the tripping operation of built-in relay, the current return of the corresponding test station of short circuit at once; Computing machine reads the tripping operation testing result by the devices communicating bus from the tripping operation detecting unit; Computing machine sends to tested electric energy meter by the ammeter communication bus and supplements instruction with money, perhaps supplements with money by artificial plug-in card, and compounding practice personnel's operation makes tested electric energy meter generation feed motion; Computing machine reads the combined floodgate testing result by the devices communicating bus from the tripping operation detecting unit.
8. three-phase intelligent test of kilo watthour meter method according to claim 7 is characterized in that: the tripping operation control signal that external relay tripping operation inserts when detecting is 220V interchange, pulse or level.
9. three-phase intelligent test of kilo watthour meter method according to claim 8 is characterized in that: pulse of high frequency active energy and reactive energy pulsed frequency that the three-phase standard electric energy meter is exported simultaneously are not less than 1000Hz; The clock frequency of described standard time clock instrument generation constant frequency is not less than 1MHz.
10. three-phase intelligent test of kilo watthour meter method according to claim 9, it is characterized in that: Error Calculator is calculated three group pulse signal errorss, wherein the error amount resolution that calculates of two group pulses is not less than 0.0001%, and the error amount resolution that another group pulse calculates is not less than 0.00005%.
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