CN201110957Y - Steady flow control device of liquid standard high flow rate test system - Google Patents
Steady flow control device of liquid standard high flow rate test system Download PDFInfo
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- CN201110957Y CN201110957Y CNU2007201024988U CN200720102498U CN201110957Y CN 201110957 Y CN201110957 Y CN 201110957Y CN U2007201024988 U CNU2007201024988 U CN U2007201024988U CN 200720102498 U CN200720102498 U CN 200720102498U CN 201110957 Y CN201110957 Y CN 201110957Y
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Abstract
Disclosed is a steady flow control device for a standard large liquid flow detection system, belonging to the technical field of liquid quantity transmission system. The steady flow control device for the standard large liquid flow detection system is provided with an electronic steady flow control part which is composed of an electronic circuit to control the steady flow and instruments controlled by the electronic circuit, an intelligentized steady flow monitoring and controlling mechanism which is a steady flow control mechanism with multi-fold, multi-path, multi-set and multi-group frequency conversion managed by a computer, and is a steady flow information collecting, processing and monitoring mechanism. The steady flow control device has the advantages that: 1, the device is intelligently managed, supported and controlled by a computer system; 2, adopting intelligentized switching and frequency conversion steady flow control technology, multiple signal and data collection and processing technology and standard frequency source technology, the device makes the steady flow control, signal collection, processing and monitoring reach the advanced level; 3, comprehensively applying advanced technologies, the steady flow control device improves the stability of the flow field of the system, improves the precision of data collection, the reliability of the detection and the operation efficiency of the system; 4, the device is reasonable in design with advanced technology and is the fruit of the innovation to a standard steady liquid flow detection system.
Description
One. technical field
It is technical field that the current stabilizing control device of the big flow verification system of the disclosed liquid standard of the utility model belongs to liquid value carrier, and what be specifically related to is the current stabilization electronic-controlled installation of the big flow verification system of liquid standard.
Two. background technology
Prime inlet bypass voltage regulation way is adopted in the voltage stabilizing of the big flow verification system of similar liquid standard that uses both at home and abroad now, promptly medium is pressurizeed by water pump, flow into pressurizing vessel through pipeline, change the medium amount that flows into pressurizing vessel by regulating the flexible valve of inlet, reach the stable of the interior liquid level of pressurizing vessel, the ultimate guarantee pressurizing vessel exports the stable of pressure medium.The subject matter that prior art exists has: 1. medium is carried transmission under water pump maximum capacity constant current constant voltage, has stored more kinetic energy in the medium, causes the instability of pressurizing vessel liquid fluctuating and top hole pressure easily; 2. pressurizing vessel inlet Bypass Control partly adopts conventional instrument control, regulates this valve regulation narrow range as adopting pneumatic diaphragm control valve, voltage stabilizing reaction velocity again is slow, and it is serious to lag behind, and causes pressurizing vessel top hole pressure unstability out of control, pressure surge is greater than ± 300Pa, regulation quality and poor as a result; 3. manual time-keeping is adopted in the timing of part of data acquisition, and it also is manually to read that flow value reads, and not only speed is slow, and attracts all multiple errors easily, and this calibrating speed and accuracy of detection to the big flow current stabilization of a liquid standard verification system all is very disadvantageous.
At above-mentioned deficiency and shortcoming, the big flow verification system of our right liquid standard improves, computer technology, converter technique, standard frequency source technology and several data collection and treatment technology in this system, have been used, the deficiencies in the prior art and shortcoming have thoroughly been solved, improved the accuracy that number is adopted greatly, the stability in flow field, the reliability of calibrating, improve the big flow current stabilization of this liquid standard verification system operational efficiency, also brought energy-saving and cost-reducing result.The big flow verification system of liquid standard is by can be used for calibrating, the calibration of high-precision liquid flowmeter, water meter to the reliable control of current stabilization, also can be widely used in aspects such as the production that needs current stabilization to supply water, experiment, the stable delivery of energy dependable flow value and condition controlled, the use of assurance measurement instrument are accurately, reliably.The big flow verification system of this liquid standard is reasonable in design, and advanced technology is the novelty invention achievement on liquid current stabilization useful test systems technology, should vigorously promote the use.
Three. summary of the invention
Goal of the invention of the present utility model is: the current stabilizing control device of the big flow verification system of this liquid standard is disclosed to society, for the raising of the big flow calibrating of the liquid standard technology of China and aborning should be used as a little work.
The technical solution of the utility model is as follows: the big flow verification system of this liquid standard includes: water storage part, water supply part, current stabilization part, assay calibration part, metering section, control section, monitoring part, power and power supply unit grade, and common combination forms.The equipment of described this system comprises: be used to make the water pump and the circulation horizontal flow basin of pressure, be used to provide the pressurizing vessel and the frequency conversion switching device in stable flow field, standard that is used to examine and determine and nonstandard pipeline, measuring container, measuring instrument etc.The current stabilizing control device of the big flow verification system of liquid standard described in the utility model, it is the electronic control part that forms and provide current stabilization for the big flow verification system of liquid standard, this part comprises equipment (as pipeline, motor), instrument of the electronic circuit of controlling current stabilization and controlled execution thereof etc., technical characterstic is: described this current stabilizing control device includes the intelligent current stabilization electronic control mechanism of computing machine and software program management control, and this intellectuality current stabilization electronic control mechanism is an intelligent current stabilization Monitoring and Controlling mechanism.Described this current stabilization Monitoring and Controlling mechanism is intelligentized, just be that these current stabilization Monitoring and Controlling mechanisms are that the powerful computer control system of ability that is provided with by this device is managed, controlled and supports, make this current stabilization Monitoring and Controlling mechanism become the intelligent current stabilization mechanism for monitoring of computer management control, the current stabilization control gear of intelligent switching frequency conversion.
Current stabilizing control device according to the big flow verification system of above-described liquid standard, technical characterstic has: the intelligent current stabilization Monitoring and Controlling mechanism of described this current stabilizing control device includes: intelligent current stabilization control gear, the current stabilization control gear of frequency conversions is switched by the intellectualities of the multichannel of computing machine and software program management control, many covers in this mechanism, this mechanism by wherein microcomputer or/and microprocessor, frequency changer circuit unit and switch circuit units thereof are mainly to constitute.The described intelligent current stabilization control gear that switches frequency conversion is multichannel, many covers, many cover liquid forced feed equipment for example can be arranged, multiple, a plurality of volumetric standards, routine, reducing (reducing and expansion footpath), standard or non-standard calibrating in parallel are switched the current stabilization control gear of frequency conversion and their frequency changer circuit unit and switch circuit units thereof with the intellectuality of multichannel pipeline.
Current stabilizing control device according to the big flow verification system of above-described liquid standard, technical characterstic has: the intelligent current stabilization Monitoring and Controlling mechanism of described this current stabilizing control device includes: intelligent current stabilization mechanism for monitoring, this mechanism manages the multiple of control by computing machine and software program, multichannel, the intellectuality collection of many cover current stabilization signals and data, handle, mechanism for monitoring, this mechanism is by the computing machine of participating, microcomputer is or/and microprocessor and management thereof control multiple, multichannel, many covers, the intellectuality collection of many group current stabilization signals and data, handle, the electronic circuit cell of monitoring is main formation.The intellectuality collection of described current stabilization signal and data, handle, mechanism for monitoring is multiple, multichannel, many covers, many cover liquid supply apparatus for example can be arranged, multiple, a plurality of volumetric standards, conventional, reducing (reducing and expansion footpath), standard in parallel or non-standard calibrating the current stabilization signal of multichannel pipeline and the intellectuality collection of data, handle, mechanism for monitoring, these mechanisms include: computing machine, microcomputer is or/and microprocessor, routine, low frequency, the current stabilization signal of simulation and the collecting unit of data, monitoring means and their multiple sensors, the processing unit of current stabilization signal and data, the channel switch unit of channel switching and signal or data etc.
Current stabilizing control device according to the big flow verification system of above-described liquid standard, technical characterstic also has: the frequency changer circuit of the multichannel of control, many covers, many controlled plants forms or/and microprocessor is participated in directly and managed by microcomputer in the frequency changer circuit unit of described this current stabilizing control device, described frequency changer circuit unit is multichannel, many covers, many controlled plants, for example can have little, in, many covers of different flow, many liquid forced feed equipment (as water pump), form the scale and the layout of multichannel liquid supply passageway.
According to the current stabilizing control device of the big flow verification system of above-described liquid standard, technical characterstic also has: form or/and microprocessor is participated in directly and managed by the multi-way switch circuit of the frequency changer circuit of the multichannel of control, many covers, many controlled plants by microcomputer for the switch circuit units of described this current stabilizing control device frequency changer circuit unit.Described switch circuit units is multichannel, many covers, many controlled plants, for example can have many covers, many liquid forced feed equipment (as water pump) to move under power frequency, frequency conversion, forms many covers, many, the commutation circuit system of multichannel specification.
According to the current stabilizing control device of the big flow verification system of above-described liquid standard, the detailed technology characteristics also have: the described frequency changer circuit of a. of described this current stabilizing control device unit is by microcomputer or/and the intelligent frequency converter of microprocessor and management control is the work frequency circuit and the non-power frequency frequency changer circuit of the main multichannel that constitutes, many covers, many water supply motors.The switch circuit units of b. described frequency changer circuit unit is and multichannel, many covers, many water supply motor work frequency circuits and the supporting intelligent multi-way switch circuit of frequency changer circuit.The computing machine of the current stabilizing control device of the big flow verification system of c. described this liquid standard, microcomputer are or/and microprocessor is formed the two-stage or the multi-level computer hierarchy of control of host computer and the next group's machine.This computer control system and software systems thereof form intelligent management, control and support to big flow verification system of liquid standard and current stabilizing control device thereof with power.
Current stabilizing control device according to the big flow verification system of above-described liquid standard, technical characterstic also has: the intelligent current stabilization mechanism for monitoring of described this current stabilizing control device includes: base or clock circuit unit when a. should intellectuality current stabilization mechanism for monitoring, it is time base or the clock circuit unit of this current stabilizing control device and even the big flow verification system of whole liquid standard, it during by high precision base or clock circuit, microcomputer or microprocessor be mainly to constitute.B. data processing unit that should intellectuality current stabilization mechanism for monitoring, it during by high precision base or clock circuit, computing machine, microcomputer or microprocessor, signal and digital processing circuit, monitoring and control circuit be mainly to constitute, this unit also comprises in addition: the trigger circuit of channel commutation circuit, channel commutation circuit, relay module etc.This data processing unit and the time base or clock circuit unit native system is provided outside the clock signal of unified benchmark, (frequency division), the metering frequently of timing, meter, counting also are provided, relatively wait multiple function, service and support, form stronger data processing function.
Current stabilizing control device according to the big flow verification system of above-described liquid standard, technical characterstic also has: the intelligent current stabilization mechanism for monitoring of described this current stabilizing control device includes: multiple, multichannel, the intellectuality collection of many cover current stabilization signals, processing mechanism, this mechanism includes: computing machine is or/and the time base circuit of control is participated in and managed to microcomputer or microprocessor directly, digital processing circuit, memory circuit, the channel commutation circuit, display circuit, printer etc., and: the conventional frequency signal collection of a., processing unit, described conventional frequency signal is meant the signal of 1～4KHz, and this unit is made up of the equipment or the instrument connection of normal signal Acquisition Circuit and collection thereof.B. the low frequency frequency signal gather, processing unit, described low frequency frequency signal is meant the signal that 1KHz is following, this unit is connected and is formed by the equipment of low frequency pulse signal Acquisition Circuit and collection thereof or instrument, frequency dividing circuit.C. collection of simulant signal, processing unit, described simulating signal comprises: the simulating signal of electric current 0～20mA, 4～20mA etc. and voltage 0～5V, 1～5V, 0～10V etc., this unit is connected and is formed by the equipment of collection of simulant signal circuit and collection thereof or instrument, analog to digital conversion circuit, coding circuit.The current stabilization signal of basic, normal, high frequency word or simulation can be gathered, be handled to intellectuality collection, the processing mechanism of above current stabilization signal.
Current stabilizing control device according to the big flow verification system of above-described liquid standard, technical characterstic also has: the intelligent current stabilization mechanism for monitoring of described this current stabilizing control device includes: multiple, multichannel, the intellectuality collection of many cover current stabilization data, handle, mechanism for monitoring, this mechanism includes: computing machine is or/and the time base circuit of control is participated in and managed to microcomputer or microprocessor directly, digital processing circuit, memory circuit, the channel commutation circuit, display circuit, printer etc., and: a. current stabilization water pressure monitoring unit, described this unit is by pressure transducer, the container (as pressurizing vessel) that differential pressure pickup and data acquisition circuit thereof and these Acquisition Circuit are provided with and gather, feeding pipe compositions such as (as multichannels).B. instrument that current stabilization flow monitoring unit, described this unit are provided with and are gathered by temperature sensor, flow sensor and data acquisition circuit thereof and these Acquisition Circuit and instrument (as flowmeter etc.), pipeline etc. are formed.C. current stabilization useful test unit, the container that described this unit is provided with and is gathered by calibrating and metering circuit, useful test instrument (as instrument such as proving flowmeters) and these useful test instrument (as volumetric standard etc.), multichannel pipeline (as the calibrating pipeline etc.) form.D. the non-standard calibrating of current stabilization unit, the container that described this unit is provided with and is gathered by calibrating and metering circuit, non-standard calibrating instrument and these non-standard calibrating instrument (as volumetric standard etc.), multichannel pipeline (as non-standard calibrating pipeline etc.) form.E. the unit is directly examined and determine in reducing and expansion, and described this unit is made up of the different pipelines of multichannel of the undergauge (big footpath dwindles) of calibrating and metering circuit, calibrating instrument (as instrument such as flowmeters) and calibrating instrument setting and collection, hole enlargement (it is big that path becomes), (two pipe parallel connections reach reducing) in parallel reducing etc.
Current stabilizing control device according to the big flow verification system of above-described liquid standard, the detailed technology characteristics also have: base or clock circuit unit when a. is described, base or clock circuit are the high precision clock pulsing circuits that produces 1MHz during wherein high precision, also comprise its crystal oscillating circuit.B. described data processing unit, its signal and digital processing circuit, monitoring and control circuit comprise PLC frequency acquisition module, PLC relay module, frequency division commutation circuit, channel commutation circuit; These circuit and Shi Ji or clock circuit, microcomputer or microprocessor are formed signal and DPA data processing activity jointly.The frequency dividing circuit of c. described low frequency signal and data acquisition, processing unit is a frequency dividing circuit of cutting apart low-frequency pulse, this frequency dividing circuit be low frequency and clock frequency relatively and low frequency is converted to the counting circuit of clock frequency.The coding circuit of d. described simulating signal and data acquisition, processing unit is a binary digital encoding circuit, this coding circuit by the computing machine of participating in directly or/and microcomputer or microprocessor hold a concurrent post, in fact by computing machine or/and microcomputer or microprocessor and software thereof these simulating signals and data are handled again.
The advantage of the current stabilizing control device of the big flow verification system of liquid standard of the present utility model is a lot: used computer technology in this system 1., the computing machine of system's (comprising in this device), microcomputer be or/and microprocessor is formed the two-stage or the multi-level computer hierarchy of control of host computer and the next group's machine, and its computer control system and software systems thereof form intelligent management, control and support to big flow verification system of liquid standard and current stabilizing control device thereof with power; 2. used intelligent switching converter technique in system and this device thereof, current stabilization control is greatly improved, the fluctuation of the top hole pressure of pressurizing vessel from original ± 300Pa drop to ± below the 100Pa, the liquid fluctuating scope of pressurizing vessel from original ± 15mm drop to ± below the 5mm; 3. system comprises and has used multiple signal and data acquisition and treatment technology in this device, make the current stabilization control of this device reach intelligent collection, handle, monitor advanced level, the flow value range of stability of flow calibrating point from original ± 5% drop to ± below 1%, the conventional meter proof time has shortened 60%, and system accuracy is from 0.1 grade of the raising of 0.2 utmost point; 4. system comprises and has used the standard frequency source technology in this device, this standard frequency source is except providing for native system the clock signal of unified benchmark, (frequency division), the metering frequently of timing, meter also is provided, counts, relatively wait multiple function, service and support, this device can be gathered various signals and data such as low frequency, intermediate frequency, high frequency, simulation, the calibrating scope expands to ten standards or non-standard pipeline from DN40～300mm from four original standard pipelines of DN80～200mm, more than 85% of full Shanxi Province of meter proof area coverage expansion; 5. the comprehensive employing of these state-of-the-art technologys, improved the stability in system flow field greatly, the accuracy that number is adopted, the reliability of calibrating has improved the big flow current stabilization of this liquid standard verification system operational efficiency, and for example system works efficient obviously promotes, shortened 75% before the time that the calibrating point settles out, also bring energy-saving and cost-reducing result, can save energy 380,000 yuan the whole year, increase income 660,000 yuan; 6. the big flow verification system of this liquid standard is reasonable in design, and advanced technology is the novelty invention achievement on liquid current stabilization useful test systems technology, should vigorously promote the use.
Four. description of drawings
Figure of description of the present utility model has 16 width of cloth:
Fig. 1 is the structured flowchart of the big flow verification system of liquid standard;
Fig. 2 is the liquid line and the schematic flow sheet of the big flow verification system of liquid standard;
Fig. 3 is the current stabilizing control device structured flowchart of the big flow verification system of liquid standard;
Fig. 4 is the automatic frequency-conversion unit or the mechanism structure schematic diagram of this current stabilizing control device;
Fig. 5～Fig. 8 is the automatic switch unit or the mechanism structure schematic diagram of the converter unit of this current stabilizing control device, wherein Fig. 5 is the main commutation circuit schematic diagram of automatic switch unit, Fig. 6 is the auxiliary commutation circuit schematic diagram of Fig. 5, Fig. 7 is the main commutation circuit schematic diagram of automatic switch unit, and Fig. 8 is the auxiliary commutation circuit schematic diagram of Fig. 7;
Fig. 9 is conventional frequency signal collection, the processing unit structured flowchart of this current stabilizing control device;
Figure 10 is that the low frequency frequency signal of this current stabilizing control device is gathered, the processing unit structured flowchart;
Figure 11 is collection of simulant signal, the processing unit structured flowchart of this current stabilizing control device
Figure 12 is signal and data acquisition channel (channel and channel) automatic switch-over circuit schematic diagram;
The DPA data processing activity structural representation of base or clock circuit and microcomputer or microprocessor management control when Figure 13 is high precision;
Figure 14～Figure 16 is the frequency dividing circuit schematic diagram of this current stabilizing control device, and wherein Figure 14 is the frequency dividing circuit schematic diagram, and Figure 15 is the forward and reverse output circuit schematic diagram of frequency division, and Figure 16 is a frequency division output circuit schematic diagram.
In each figure: 1. pond; 2～4. water pumps; 5. pressurizing vessel; 6. to container; 7. stop valve; 8. tested table; 9. variable valve; 10. standard scale; 11. commutator; 12. volumetric standard; 13. stop valve; 14 (14.a and b). frequency divider; 15. digital watch; 16. master control system; 17. frequency converter; 18. host computer; 19. standard frequency source; 20. dotted line is represented old control gear; 21. pneumatic control valve; 22. pneumatic cut-off valve; 23. standard electric magnetic flowmeter; 24. electric control valve; 25. tested electromagnetic flowmeter; 26. dotted line signal backflow water route; 27. tensimeter; 28. pressure transducer; 29. interface circuit; 30. power frequency/frequency conversion automatic switch unit; 31. pressure unit; 32. calibrating unit; 33. flow regulating unit; 34. reversing unit; 35. people/machine dialogue input (as keyboard); 36. flow transmitter; 37. lock is switched in frequency conversion; 38. power frequency is switched lock; 39. fuse; 40～42. are respectively the motor of water pump 2～4; 43. clamp on amperemeter; 44. power control 220V power supply side; 45. power switch; The serial change-over switch that 46～No. 49.1 pump motor power frequencies start, move, stop, wherein 47 is relay assembly (serial change-over switch); 50. delay switch; The serial change-over switch that 51～54. is No. 1 pump motor variable frequency starting, moves, stops, wherein 52 is relay assembly (serial change-over switch); 55～58. is serial change-over switches that No. 2 pump motor power frequencies start, move, stop, and wherein 56 is relay assembly (serial change-over switch); 59. delay switch; The serial change-over switch that 60～63. is No. 2 pump motor variable frequency startings, moves, stops, wherein 61 is relay assembly (serial change-over switch); 64,65 is that the control contactor of lock (sending electric brake) is started in No. 1, No. 2 pump motors, and wherein 65 is relay assembly (serial change-over switch); 66,67,70,71. be No. 1 pump motor power frequency and variable frequency starting, the pilot lamp that moves, stop; 68,69,72,73. be No. 2 pump motor power frequencies and variable frequency starting, the pilot lamp that moves, stop; 74. prime low-voltage control power feeder ear; 75. be that three retaining switches 82,83 are its end of convert; 76～78. is serial low voltage control change-over switches that No. 1 pump motor power frequency starts, moves, stops, and 84,85,87 is its end of convert; The serial low voltage control change-over switch that 79～81. is No. 1 pump motor variable frequency starting, moves, stops, 84,86,88 is its end of convert; 89. be three retaining switches, 97,98 is its end of convert; 90～92. is serial low voltage control change-over switches that No. 2 pump motor power frequencies start, move, stop, and 99,100,102 is its end of convert; The serial low voltage control change-over switch that 93～95. is No. 2 pump motor variable frequency startings, moves, stops, 99,101,103 is its end of convert; 96. be the low-voltage control switch of the control contactor of power supply lock, 104 is its control end; 105～108. is serial change-over switches that No. 3 pump motor power frequencies start, move, stop, and wherein 106 is relay assembly (serial change-over switch); 109 delay switchs; The serial change-over switch that 110～113. is No. 3 pump motor variable frequency startings, moves, stops, wherein 111 is relay assembly (serial change-over switch); The pilot lamp that 114～117. is No. 3 pump motor power frequencies and variable frequency starting, moves, stops; 118. be three retaining switches, 125,126 is its end of convert; 119～121. is serial low voltage control change-over switches that No. 3 pump motor power frequencies start, move, stop, and 127,128,130 is its end of convert; The serial low voltage control change-over switch that 122～124. is No. 3 pump motor variable frequency startings, moves, stops, 127,129,131 is its end of convert; 132. conventional frequency signal; 133. data processing software; 134. display unit; 135. low frequency frequency (pulse) signal; 136. simulating signal; 137. high accuracy number indicator gauge; 138. be converted to binary data; 139,140. two-way switching signals input, 141 is its transfer relay assembly; 142. phase inverter; 143. positive designature transfer relay assembly; 144. low frequency signal input; 145. low frequency signal conversion; 146, the transfer relay assembly is selected in 147. tested table pulse frequency divisions; 148. the transfer relay assembly is selected in tested table step-by-step counting input; 149. the transfer relay assembly is selected in tested table trigger action input; 150,151. some standard scale signal inputs, 152 is its transfer relay assembly; 153,154. other standard scale signal inputs, 155 is its transfer relay assembly; 156,157. some standard scale signal inputs again, 158 is its transfer relay assembly; 159. the nominal time (jar water time), unit 10 microseconds; 160. tested table step-by-step counting/timing (step-by-step counting during the tested table jar water/each recurrence interval timing is promptly surveyed the cycle); 161,162. standard scale step-by-step countings; 163. data processing unit or module; 164. data interaction bus; 165. relay trigger module; 166. microprocessor unit; 167. control signal I/O; 168. channel/channel switch unit; 169. Be Controlled unit or equipment; U. power circuit; V. feeder ear; 170. standard clock signal input; 171,175,176,182. all is inverter modules; 172,177,178,183～187. all is amplifier modules; 173. fractional frequency signal output; 174. forward and reverse signal input; 179. oppositely 24V direct current output; 180. forward 24V direct current output; 181. imported by fractional frequency signal; 188.1 fractional frequency signal output; 189.2 fractional frequency signal output; 190.8 fractional frequency signal output; 191.32 fractional frequency signal output; 192.128 fractional frequency signal output; 193. ground end; R
1～R
10. be resistance; C
1～C
2. be electric capacity; D
1～D
2. be diode; T
1～T
8. be triode; IC
1, IC
2. be integrated circuit (IC) chip; K. toggle switch.
Five. specific embodiments
Non-limiting examples of the present utility model is as follows:
Embodiment one. the current stabilizing control device of the big flow verification system of liquid standard
Fig. 1 provides the structured flowchart of the big flow verification system of this example liquid standard, as shown in Figure 1: the big flow verification system of this liquid standard includes: water storage part (pond 1), water supply part (water pump 2～4 etc.), current stabilization part (pressurizing vessel 5, to container 6, volumetric standard 12 etc.), assay calibration part (tested table 8, standard scale 10, digital watch 15 etc.), metering section (standard electric magnetic flowmeter 23, tested electromagnetic flowmeter 25, tensimeter 27, pressure transducer 28 etc.), control section (various pipelines, stop valve 7 and 13, variable valve 9, commutator 11, pneumatic control valve 21, pneumatic cut-off valve 22, electric control valve 24 etc.), monitoring part (master control system 16, frequency divider 14, frequency converter 17, host computer 18, standard frequency source 19 etc.), power (pump motor 40～42 etc.) grades with power supply unit, and common combination forms.The equipment of described this system comprises: be used to make the water pump (2～4) of pressure and circulation horizontal flow basin 1 etc., be used to provide the pressurizing vessel 5 and the frequency conversion switching device (power frequency/frequency conversion automatic switch unit 30 etc.) in stable flow field, standard that is used to examine and determine and nonstandard pipeline, measuring container (6 and 12) etc., measuring instrument (8,10,15,43) etc.The current stabilizing control device of the big flow verification system of liquid standard that this is routine, it is the electronic control part that forms and provide current stabilization for the big flow verification system of liquid standard, this part comprises equipment (as pipeline, motor), instrument of the electronic circuit of controlling current stabilization and controlled execution thereof etc., the current stabilizing control device of the big flow verification system of this routine described liquid standard is united by Fig. 2～Figure 16 and to be illustrated.Shown in Figure 2 is the liquid line and the schematic flow sheet of this routine big flow verification system of liquid standard, and shown in Figure 3 is the structured flowchart of this example current stabilizing control device.Technical characterstic is: described this current stabilizing control device includes the intelligent current stabilization electronic control mechanism of computing machine and software program management control, and this intellectuality current stabilization electronic control mechanism is an intelligent current stabilization Monitoring and Controlling mechanism.Described this current stabilization Monitoring and Controlling mechanism is intelligentized, just be that these current stabilization Monitoring and Controlling mechanisms are by the ability that is provided with in this device powerful computer control system management, control and support, the computing machine of the current stabilizing control device of the big flow verification system of this liquid standard, microcomputer make this current stabilization Monitoring and Controlling mechanism become the intelligent current stabilization mechanism for monitoring of computer management control, the intelligent current stabilization control gear that switches frequency conversion or/and microprocessor is formed multistage (as three grades) computer control system of host computer 18 and the next group's machine (master control system 16 etc.).The intelligent current stabilization Monitoring and Controlling mechanism of this current stabilizing control device includes: intelligent current stabilization control gear, the current stabilization control gear of frequency conversion is switched by computing machine and the multichannel of software program management control, the intellectuality of many covers in this mechanism, (as master control system 16 etc.), frequency changer circuit unit and switch circuit units thereof are mainly to constitute or/and microprocessor by wherein microcomputer in this mechanism, and this mechanism and said units can be united by Fig. 4～Fig. 8 and illustrated.The described intelligent current stabilization control gear that switches frequency conversion is multichannel, many covers, for example from Fig. 1～Fig. 3 as can be seen: many cover liquid forced feed equipment (as three cover water pumps 2～4) are arranged, multiple, a plurality of volumetric standards 12 etc., conventional, reducing (reducing and expansion footpath), in parallel, standard or non-standard calibrating are switched the current stabilization control gear of frequency conversion and their frequency changer circuit unit and switch circuit units thereof with the intellectuality of multichannel pipeline.The frequency changer circuit of the multichannel of control, many covers, many controlled plants forms or/and microprocessor is participated in directly and managed by microcomputer in the frequency changer circuit unit of this example current stabilizing control device.Also the frequency changer circuit unit of current stabilizing control device that promptly should example is by microcomputer or/and the intelligent frequency converter of microprocessor and management control is the work frequency circuit and the non-power frequency frequency changer circuit of the main multichannel that constitutes, many covers, many water supply motors.Form or/and microprocessor is participated in directly and managed by the multi-way switch circuit of the frequency changer circuit of the multichannel of control, many covers, many controlled plants by microcomputer for the switch circuit units of this example current stabilizing control device frequency changer circuit unit.The switch circuit units that also is the frequency changer circuit unit is and multichannel, many covers, many water supply motor work frequency circuits and the supporting intelligent multi-way switch circuit of frequency changer circuit.Fig. 4 signal provides the structure of the motor 40～42 and the frequency changer circuit unit thereof of three water pumps 2～4.Fig. 5, Fig. 6 unite the structure of master control that No. 1, No. 2 pump motor is shown and the two-stage switch circuit units of secondary control.In Fig. 5 of master switching circuit: 46～49 is the serial change-over switch that No. 1 pump motor power frequency starts, moves, stops, and wherein 47 is relay assembly (serial change-over switch); The 50th, delay switch; The serial change-over switch that 51～54 is No. 1 pump motor variable frequency starting, moves, stops, wherein 52 is relay assembly (serial change-over switch); 66,67,70,71 be No. 1 pump motor power frequency and variable frequency starting, the pilot lamp that moves, stop.55～58 is serial change-over switches that No. 2 pump motor power frequencies start, move, stop, and wherein 56 is relay assembly (serial change-over switch); The 59th, delay switch; The serial change-over switch that 60～63 is No. 2 pump motor variable frequency startings, moves, stops, wherein 61 is relay assembly (serial change-over switch); 68,69,72,73 be No. 2 pump motor power frequencies and variable frequency starting, the pilot lamp that moves, stop.In Fig. 6 of pair control (low voltage control switching) commutation circuit: 76～78 is serial low voltage control change-over switches that No. 1 pump motor power frequency starts, moves, stops, and 84,85,87 is its end of convert; The serial low voltage control change-over switch that 79～81 is No. 1 pump motor variable frequency starting, moves, stops, 84,86,88 is its end of convert.90～92 is serial low voltage control change-over switches that No. 2 pump motor power frequencies start, move, stop, and 99,100,102 is its end of convert; The serial low voltage control change-over switch that 93～95 is No. 2 pump motor variable frequency startings, moves, stops, 99,101,103 is its end of convert.Fig. 7, Fig. 8 unite the structure of master control that No. 3 pump motors are shown and the two-stage switch circuit units of secondary control.In Fig. 7 of master switching circuit: 105～108 is serial change-over switches that No. 3 pump motor power frequencies start, move, stop, and wherein 106 is relay assembly (serial change-over switch); 109 is delay switch; The serial change-over switch that 110～113 is No. 3 pump motor variable frequency startings, moves, stops, wherein 111 is relay assembly (serial change-over switch); The pilot lamp that 114～117 is No. 3 pump motor power frequencies and variable frequency starting, moves, stops.In Fig. 8 of pair control (low voltage control switching) commutation circuit: 119～121 is serial low voltage control change-over switches that No. 3 pump motor power frequencies start, move, stop, and 127,128,130 is its end of convert; The serial low voltage control change-over switch that 122～124 is No. 3 pump motor variable frequency startings, moves, stops, 127,129,131 is its end of convert.The structure of examples of implementation is: utilize a frequency converter 17 to realize from 0～1100m by commutation circuit
3The flexibility of/h supplies water, low discharge 0～400m
3/ h separate unit pump variable frequency supplies water; Middle flow 400～800m
3Pump variable frequency of/h supplies water, and a water pump power frequency supplies water; Big flow 800～1100m
3Pump variable frequency of/h supplies water, and two water pump power frequencies supply water.The intelligent current stabilization Monitoring and Controlling mechanism of described this current stabilizing control device also includes: intelligent current stabilization mechanism for monitoring, this mechanism is by multiple, the multichannel of computer management control, overlaps intellectuality collection, processing, the mechanism for monitoring of current stabilization signal and data more, this mechanism by the computing machine of participating, microcomputer or/and the electronic circuit cell of multiple, the multichannel of microprocessor and management control thereof, many covers, the intellectuality collection of organizing current stabilization signal and data, processing, monitoring is that the master constitutes more.The current stabilization signal that this is routine and the intellectuality collection of data, handle, mechanism for monitoring is multiple, multichannel, many covers, many cover liquid supply apparatus for example can be arranged, multiple, a plurality of volumetric standards, conventional, reducing (reducing and expansion footpath), standard in parallel or non-standard calibrating the current stabilization signal of multichannel pipeline and the intellectuality collection of data, handle, mechanism for monitoring, the intelligent current stabilization mechanism for monitoring of this example is united by Fig. 9～Figure 16 and is illustrated, these mechanisms include: computing machine, microcomputer is or/and microprocessor, routine, low frequency, the current stabilization signal of simulation and the collecting unit of data, monitoring means and their multiple sensors, the processing unit 163 of current stabilization signal and data, the channel switch unit 168 of channel switching and signal or data etc.The intelligent current stabilization mechanism for monitoring of this example current stabilizing control device is individual multiple, multichannel, the intellectuality collection of many cover current stabilization signals, processing mechanism, this mechanism includes: computing machine is or/and the time base circuit of control is participated in and managed to microcomputer or microprocessor directly, digital processing circuit, memory circuit, the channel commutation circuit, display circuit, printer etc., and: the conventional frequency signal collection of a., processing unit, described conventional frequency signal is meant the signal of 1～4KHz, this unit is made up of the equipment or the instrument connection of normal signal Acquisition Circuit and collection thereof, and Fig. 9 illustrates the conventional frequency signal collection of this routine current stabilizing control device, the processing unit structured flowchart.B. low frequency frequency signal collection, processing unit, described low frequency frequency signal is meant the signal that 1KHz is following, this unit is connected and is formed by the equipment of low frequency pulse signal Acquisition Circuit and collection thereof or instrument, frequency dividing circuit, Figure 10 illustrates the collection of low frequency frequency signal, the processing unit structured flowchart of this routine current stabilizing control device, the frequency dividing circuit of described low frequency signal and data acquisition, processing unit is a frequency dividing circuit of cutting apart low-frequency pulse, this frequency dividing circuit be low frequency and clock frequency relatively and low frequency is converted to the counting circuit of clock frequency.C. collection of simulant signal, processing unit, described simulating signal comprises: the simulating signal of electric current 0～20mA, 4～20mA etc. and voltage 0～5V, 1～5V, 0～10V etc., this unit is connected and is formed by the equipment of collection of simulant signal circuit and collection thereof or instrument, analog to digital conversion circuit, coding circuit, also promptly be made up of signal source, high accuracy number table, 232 converters, computing machine, PLC, Figure 11 illustrates collection of simulant signal, the processing unit structured flowchart of this routine current stabilizing control device.Described simulating signal and data acquisition, the coding circuit of processing unit is a binary digital encoding circuit, this coding circuit by the computing machine of participating in directly or/and microcomputer or microprocessor hold a concurrent post, tested table signal is generally 4～20mA (1～5V etc.), by signal cable signals collecting is arrived the high accuracy number table, show and convert digital signal to by the high accuracy number table by 232 conversion interface circuits, by computer acquisition, by advanced language programming real time data is carried out communication with Siemens software wincc, participate in control and data computation by PLC, avoided conventional method directly to gather the loss of significance that analog signals causes by PLC.The current stabilization signal of basic, normal, high frequency word or simulation can be gathered, be handled to intellectuality collection, the processing mechanism of above current stabilization signal.Figure 12 illustrates this routine signal and data acquisition channel (channel and channel) automatic switch-over circuit schematic diagram.In Figure 12: 139,140 are the input of two-way switching signal, 141 is its transfer relay assembly, the 142nd, phase inverter, the 143rd, positive designature transfer relay assembly, 144 are the low frequency signal input, the 145th, and the low frequency signal conversion, 146,147 is that the transfer relay assembly is selected in tested table pulse frequency division, 148 is that the transfer relay assembly is selected in tested table step-by-step counting input, the 149th, and the transfer relay assembly is selected in tested table trigger action input; 150,151 is some standard scale signal inputs, and 152 is its transfer relay assembly; 153, the 154th, other standard scale signal inputs, 155 is its transfer relay assembly; 156,15 are some standard scale signal inputs again, and 158 is its transfer relay assembly; 159 nominal times (jar water time), unit 10 microseconds, 160 are tested table step-by-step counting/timing (step-by-step counting during the tested table jar water/each recurrence interval timing is promptly surveyed the cycle); 161,162 is the standard scale step-by-step counting.The intelligent current stabilization mechanism for monitoring of the current stabilizing control device that this is routine also includes: time base or the clock circuit unit of this intellectuality current stabilization mechanism for monitoring, it is time base or the clock circuit unit of this current stabilizing control device and even the big flow verification system of whole liquid standard, it during by high precision base or clock circuit, microcomputer or microprocessor be mainly to constitute.The data processing unit of the intelligent current stabilization mechanism for monitoring of this example during by high precision base or clock circuit, microcomputer or microprocessor, signal and digital processing circuit, monitoring and control circuit be mainly to constitute.The DPA data processing activity structural representation of base or clock circuit and microcomputer or microprocessor management control when Figure 13 illustrates this routine high precision, in Figure 13: the 16th, master control system, it can be microcomputer or microprocessor group, for example be technical grade PLC, form as the S7-300 series that can adopt Siemens.19 promptly is standard frequency source, and base or clock circuit are the high precision clock pulsing circuits that produces 1MHz or 0.1MHz during this high precision.Described data processing unit, its signal and digital processing circuit, monitoring and control circuit comprise: PLC frequency acquisition module, PLC relay module, frequency division commutation circuit, channel commutation circuit.These circuit and Shi Ji or clock circuit, microcomputer or microprocessor are formed signal and DPA data processing activity jointly.The 163rd, data processing unit or module, the 164th, the data interaction bus, the 165th, the relay trigger module, 166 is microprocessor unit, and 167 is the control signal I/O, and 168 is channel/channel switch unit, and 169 is Be Controlled unit or equipment.Figure 14～Figure 16 is the frequency dividing circuit schematic diagram of this routine current stabilizing control device, and wherein Figure 14 is the frequency dividing circuit schematic diagram, and this frequency dividing circuit can be respectively from 173 outputs, 16,32,64,128 fractional frequency signals by toggle switch K.Figure 15 is the forward and reverse output circuit schematic diagram of frequency division, the circuit of this figure can+5V～+ conversion of 24V input signal into about the positive and negative square wave of 5V respectively from 179 and 180 outputs.Figure 16 is a frequency division output circuit schematic diagram, and this frequency division output circuit is through integrated circuit die I C
2Frequency division is as IC
2Can adopt integrated circuit (IC) chip 74HC393 etc., respectively from 188 outputs, 1 fractional frequency signal, 189 outputs, 2 fractional frequency signals, 190 outputs, 8 fractional frequency signals, 191 outputs, 32 fractional frequency signals, 192 outputs, 128 fractional frequency signals.The intelligent current stabilization mechanism for monitoring of the current stabilizing control device that this is routine also includes: multiple, multichannel, the intellectuality collection of many cover current stabilization data, handle, mechanism for monitoring, this mechanism includes: computing machine is or/and the time base circuit of control is participated in and managed to microcomputer or microprocessor directly, digital processing circuit, memory circuit, the channel commutation circuit, display circuit, printer etc., and: a. current stabilization water pressure monitoring unit, this unit is by pressure transducer, the container (as pressurizing vessel 5) that differential pressure pickup (high-precision pressure sensor) and data acquisition circuit thereof and these Acquisition Circuit are provided with and gather, feeding pipe compositions such as (as multichannels).B. instrument that current stabilization flow monitoring unit, this unit are provided with and are gathered by temperature sensor, flow sensor and data acquisition circuit thereof and these Acquisition Circuit and instrument (as flowmeter etc.), pipeline etc. are formed.C. current stabilization useful test unit, the container that this unit is provided with and is gathered by calibrating and metering circuit, useful test instrument (as instrument such as standard electric magnetic flowmeters 23) and these useful test instrument (as volumetric standard 12 etc.), multichannel pipeline (as the calibrating pipeline etc.) form.D. the non-standard calibrating of current stabilization unit, the container that described this unit is provided with and is gathered by calibrating and metering circuit, non-standard calibrating instrument and these non-standard calibrating instrument (as volumetric standard 12 etc.), multichannel pipeline (as non-standard calibrating pipeline etc.) form.
E. the unit is directly examined and determine in reducing and expansion, and this unit is made up of the different pipelines of multichannel of the undergauge (big footpath dwindles) of calibrating and metering circuit, calibrating instrument (as instrument such as flowmeters) and calibrating instrument setting and collection, hole enlargement (it is big that path becomes), (two pipe parallel connections reach reducing) in parallel reducing etc.Some examples of implementation are: use reducing and expansion footpath technology, hole enlargement (little change is big), undergauge (diminishing greatly) are examined and determine or are calibrated the tested table of non-standard caliber.Or adopt many little calibers in parallel that the large-caliber flow meter is examined and determine or calibrated.Detection capability develops into ten standards of DN40～DN300mm (non-standard) pipeline from four standard pipelines of DN80～DN200mm.The pipeline of above c, d, e etc. also can be referring to shown in Figure 3.
Embodiment two. the current stabilizing control device of the big flow verification system of liquid standard
The general structure of the current stabilizing control device of the big flow verification system of liquid standard of this embodiment can be referring to the structure shown in Fig. 1～Figure 16 associating.The current stabilizing control device of the big flow verification system of liquid standard that this is routine and the current stabilizing control device difference of the big flow verification system of liquid standard described in the embodiment one have: 1. computing machine that should example, microcomputer are or/and microprocessor is formed the two level computer hierarchy of control of host computer and the next group's machine.2. intelligent current stabilization control gear that should example, this mechanism be by computing machine and the multichannel of software program management control, many groups, many water pumps of two covers intellectuality switch the current stabilization control gear of frequency conversion.All the other are not stated, and are same as entirely described in the embodiment one, no longer repeat.
Embodiment three. the current stabilizing control device of the big flow verification system of liquid standard
The general structure of the current stabilizing control device of the big flow verification system of liquid standard of this embodiment can be referring to the structure shown in Fig. 1～Figure 16 associating.The current stabilizing control device difference of the big flow verification system of liquid standard described in the current stabilizing control device of the big flow verification system of liquid standard that this is routine and embodiment one, the embodiment two has: 1. intelligent current stabilization control gear that should example, this mechanism be by computing machine and the multichannel of software program management control, many groups, many cover (as quadruplet) many (Ru Wutai) water pumps intellectuality switch the current stabilization control gear of frequency conversion.2. the microcomputer of intelligent current stabilization control gear that should example is or/and microprocessor, frequency changer circuit unit and switch circuit units thereof, the computing machine of intelligent current stabilization mechanism for monitoring, microcomputer is or/and microprocessor and management thereof control multiple, multichannel, many covers, the intellectuality collection of many group current stabilization signals and data, handle, the electronic circuit cell of monitoring, all can adopt public technology to design, make, described each electronic circuit all can adopt public technology to design, and all can adopt the various electronic components of commercial goods, device, assembly, Component Design, assembling and manufacturing are as long as it can finish or realize all can adopting of each electronic circuit function.All the other are not stated, and are same as entirely described in embodiment one, the embodiment two, no longer repeat.
Claims (10)
1. the current stabilizing control device of the big flow verification system of liquid standard, this device is the electronic control part that forms and provide current stabilization for the big flow verification system of liquid standard, this part comprises the electronic circuit of controlling current stabilization and equipment, the instrument of controlled execution thereof, be characterised in that: described this current stabilizing control device includes the intelligent current stabilization electronic control mechanism of computer management control, and this intellectuality current stabilization electronic control mechanism is an intelligent current stabilization Monitoring and Controlling mechanism.
2. the current stabilizing control device of the big flow verification system of liquid standard according to claim 1, be characterised in that: the intelligent current stabilization Monitoring and Controlling mechanism of described this current stabilizing control device includes: intelligent current stabilization control gear, the current stabilization control gear of frequency conversions is switched by the intellectualities of the multichannel of computer management control, many covers in this mechanism, this mechanism by wherein microcomputer or/and microprocessor, frequency changer circuit unit and switch circuit units thereof are mainly to constitute.
3. the current stabilizing control device of the big flow verification system of liquid standard according to claim 1, be characterised in that: the intelligent current stabilization Monitoring and Controlling mechanism of described this current stabilizing control device includes: intelligent current stabilization mechanism for monitoring, this mechanism is multiple by computer management control, multichannel, the intellectuality collection of many cover current stabilization signals and data, handle, mechanism for monitoring, this mechanism is by the computing machine of participating, microcomputer is or/and microprocessor and management thereof control multiple, multichannel, many covers, the intellectuality collection of many group current stabilization signals and data, handle, the electronic circuit cell of monitoring is main formation.
4. the current stabilizing control device of the big flow verification system of liquid standard according to claim 2 is characterised in that: the frequency changer circuit of the multichannel of control, many covers, many controlled plants forms or/and microprocessor is participated in directly and managed by microcomputer in the frequency changer circuit unit of described this current stabilizing control device.
5. the current stabilizing control device of the big flow verification system of liquid standard according to claim 2 is characterised in that: form or/and microprocessor is participated in directly and managed by the multi-way switch circuit of the frequency changer circuit of the multichannel of control, many covers, many controlled plants by microcomputer for the switch circuit units of described this current stabilizing control device frequency changer circuit unit.
6. according to the current stabilizing control device of claim 4 or the big flow verification system of 5 described liquid standard, be characterised in that: described this current stabilizing control device
A. the frequency changer circuit unit is by microcomputer or/and the intelligent frequency converter of microprocessor and management control is the work frequency circuit and the non-power frequency frequency changer circuit of the main multichannel that constitutes, many covers, many water supply motors;
B. the switch circuit units of frequency changer circuit unit is and multichannel, many covers, many water supply motor work frequency circuits and the supporting intelligent multi-way switch circuit of frequency changer circuit;
The computing machine of the current stabilizing control device of the big flow verification system of c. described this liquid standard, microcomputer are or/and microprocessor is formed the two-stage or the multi-level computer hierarchy of control of host computer and the next group's machine.
7. the current stabilizing control device of the big flow verification system of liquid standard according to claim 3 is characterised in that: the intelligent current stabilization mechanism for monitoring of described this current stabilizing control device includes:
A. time base or clock circuit unit that should intellectuality current stabilization mechanism for monitoring, it is time base or the clock circuit unit of this current stabilizing control device and even the big flow verification system of whole liquid standard, it during by high precision base or clock circuit, microcomputer or microprocessor be mainly to constitute;
B. data processing unit that should intellectuality current stabilization mechanism for monitoring, it during by high precision base or clock circuit, microcomputer or microprocessor, signal and digital processing circuit, monitoring and control circuit be mainly to constitute.
8. the current stabilizing control device of the big flow verification system of liquid standard according to claim 3, be characterised in that: the intelligent current stabilization mechanism for monitoring of described this current stabilizing control device includes: multiple, multichannel, overlap intellectuality collection, the processing mechanism of current stabilization signal more, this mechanism includes: computing machine is or/and time base circuit, digital processing circuit, memory circuit, channel commutation circuit, display circuit, the printer of control are participated in and managed to microcomputer or microprocessor directly, and:
A. conventional frequency signal collection, processing unit, described this unit is made up of the equipment or the instrument connection of normal signal Acquisition Circuit and collection thereof;
B. the low frequency frequency signal gather, processing unit, described this unit is connected and is formed by the equipment of low frequency pulse signal Acquisition Circuit and collection thereof or instrument, frequency dividing circuit;
C. collection of simulant signal, processing unit, described this unit is connected and is formed by the equipment of collection of simulant signal circuit and collection thereof or instrument, analog to digital conversion circuit, coding circuit.
9. the current stabilizing control device of the big flow verification system of liquid standard according to claim 3, be characterised in that: the intelligent current stabilization mechanism for monitoring of described this current stabilizing control device includes: multiple, multichannel, overlap intellectuality collection, processing, the mechanism for monitoring of current stabilization data more, this mechanism includes: computing machine is or/and time base circuit, digital processing circuit, memory circuit, channel commutation circuit, display circuit, the printer of control are participated in and managed to microcomputer or microprocessor directly, and:
A. current stabilization water pressure monitoring unit, described this unit is made up of container, pipeline that pressure transducer, differential pressure pickup and data acquisition circuit thereof and these Acquisition Circuit are provided with and gather;
B. current stabilization flow monitoring unit, described this unit is made up of instrument, instrument, pipeline that temperature sensor, flow sensor and data acquisition circuit thereof and these Acquisition Circuit are provided with and gather;
C. current stabilization useful test unit, described this unit is made up of container, multichannel pipeline that calibrating and metering circuit, useful test instrument and these useful test instrument are provided with and gather;
D. the non-standard calibrating of current stabilization unit, described this unit is made up of container, multichannel pipeline that calibrating and metering circuit, non-standard calibrating instrument and these non-standard calibrating instrument are provided with and gather;
E. the unit is directly examined and determine in reducing and expansion, and described this unit is made up of with the different pipelines of multichannel of the reducing of metering circuit, the undergauge of examining and determine instrument and calibrating instrument setting and collection, hole enlargement, parallel connection calibrating.
10. according to the current stabilizing control device of claim 7 or the big flow verification system of 8 or 9 described liquid standard, be characterised in that:
Base or clock circuit are the high precision clock pulsing circuits that produces 1MHz when base or clock circuit unit when a. described, wherein high precision;
B. described data processing unit, its signal and digital processing circuit, monitoring and control circuit comprise PLC frequency acquisition module, PLC relay module, frequency division commutation circuit, channel commutation circuit; These circuit and Shi Ji or clock circuit, microcomputer or microprocessor are formed signal and DPA data processing activity jointly;
The frequency dividing circuit of c. described low frequency signal and data acquisition, processing unit is a frequency dividing circuit of cutting apart low-frequency pulse, this frequency dividing circuit be low frequency and clock frequency relatively and low frequency is converted to the counting circuit of clock frequency;
The coding circuit of d. described simulating signal and data acquisition, processing unit is a binary digital encoding circuit, this coding circuit by the computing machine of participating in directly or/and microcomputer or microprocessor hold a concurrent post.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201024988U CN201110957Y (en) | 2007-09-12 | 2007-09-12 | Steady flow control device of liquid standard high flow rate test system |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2007201024988U CN201110957Y (en) | 2007-09-12 | 2007-09-12 | Steady flow control device of liquid standard high flow rate test system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107102615A (en) * | 2017-07-03 | 2017-08-29 | 四川理工学院 | A kind of irrigated area intelligence control system based on intelligent integral plate lock |
| CN117587522A (en) * | 2024-01-19 | 2024-02-23 | 苏州优晶半导体科技股份有限公司 | Silicon carbide crystal growth equipment with high-precision cooling control and control method |
-
2007
- 2007-09-12 CN CNU2007201024988U patent/CN201110957Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107102615A (en) * | 2017-07-03 | 2017-08-29 | 四川理工学院 | A kind of irrigated area intelligence control system based on intelligent integral plate lock |
| CN117587522A (en) * | 2024-01-19 | 2024-02-23 | 苏州优晶半导体科技股份有限公司 | Silicon carbide crystal growth equipment with high-precision cooling control and control method |
| CN117587522B (en) * | 2024-01-19 | 2024-05-14 | 苏州优晶半导体科技股份有限公司 | Silicon carbide crystal growth equipment with high-precision cooling control and control method |
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