CN104344875A - Pulse timing and counting device and method for liquid flow verification - Google Patents
Pulse timing and counting device and method for liquid flow verification Download PDFInfo
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- CN104344875A CN104344875A CN201410637208.4A CN201410637208A CN104344875A CN 104344875 A CN104344875 A CN 104344875A CN 201410637208 A CN201410637208 A CN 201410637208A CN 104344875 A CN104344875 A CN 104344875A
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Abstract
The invention provides a pulse timing and counting device and method for liquid flow verification. A pulse timing and counting device is arranged above a flow meter of a liquid flow device and comprises a main controller; the main controller coordinates the work of external modules; the external modules comprise a timing and counting module, a communication module, a key input module, a level trigger module, a display module and an output module. A diverter diverts to enable water to flow into a weighing water tank, a blocking piece on the diverter blocks a photoelectric switch to generate a trigger signal, and the trigger signal is transmitted to the pulse timing and counting device to start to time and count; when the water in the weighing water tank reaches predetermined weight, the diverter diverts to stop timing and counting, and the weight, the time and the pulse count for weighing are recorded. By adopting the pulse timing and counting device and method, the synchronization of timing and counting of the flow verification device can be realized; meanwhile the diversion time difference of each diversion of the diverter can be detected.
Description
Technical field
The invention belongs to fluid flow or volumetric metering technical field, be specifically related to a kind of pulse timing counting assembly for fluid flow calibrating and method.
Background technology
Flow metering is that the ingredient of wanting most of measuring science is widely applied in each field.A kind of standard set-up that flow standard device transmits as flow instrument, based on the fluid flow device of Static mass method.
In " JJG164-2000 fluid flow device vertification regulation ", define two kinds of methods examine and determine commutator, progressive error method and flowmeter method.Progressive error method is the time swapping out by measuring commutator respectively and change to, and calculates their standard deviation and mistiming of swapping out and changing to, and then calculates the uncertainty of commutator.The method is comparatively simple, and it is convenient to implement, and is widely used, but in verification process, because timer and timer are two independently equipment, their synchronism is difficult to ensure.
Summary of the invention
The object of the present invention is to provide a kind of pulse timing counting assembly for fluid flow calibrating and method, it can time of the umber of pulse that sends of synchro measure flowmeter and calibrating, and the commutating period can measuring commutator in standard water flow apparatus is poor.
Realize the technical scheme of the object of the invention: a kind of pulse timing counting assembly for fluid flow calibrating, this device is used for fluid flow device, and it arranges pulse timing counting assembly above the flowmeter of fluid flow device;
Described fluid flow device comprises cyclic water tank, and cyclic water tank connects water pump by pipeline; Water pump connects buffer tank by pipeline, and buffer tank is by pipeline connection traffic meter, and flowmeter connects the rising pipe be arranged on above commutator by pipeline; Above cyclic water tank, arrange electronic scales, water tank of weighing placed by electronic scales, and water tank side of weighing is cyclic water tank entrance; Commutator is arranged on weigh water tank and cyclic water tank entrance top, and rising pipe is arranged on above commutator; This rising pipe side, with washer, is provided with optoelectronic switch with the commutator of its corresponding position; Be provided with water delivering orifice bottom commutator, changed by commutator position, the water that rising pipe is flowed out its only flow into cyclic water tank entrance or only flow into and to weigh water tank;
Described pulse timing counting assembly comprises master controller, and external module work coordinated by master controller, and external module comprises timing counting module, communication module, keyboard input module, level triggers module, display module, output module; Wherein, the pulse signal that timing counting module flow meter produces counts, and carries out enable according to the trigger pip pulse count function of level triggers module; Timing, tally function use the same processor in this module to complete, and ensure the synchronous of time reference; In timing, counting process, the umber of pulse of record can be presented in display module in real time; Keyboard input module has one group of button, by operative combination button, in conjunction with the content of display screen display, can reset, arrange messaging parameter timing counting; Communication module has RS485 interface, by modbus485 agreement, reads umber of pulse.
As above for a pulse timing counting assembly for fluid flow calibrating, its pipeline be connected with water pump at cyclic water tank is provided with pump intake valve; Water pump and the tank connected pipeline of voltage stabilizing are provided with pump discharge valve; The pipeline that buffer tank is connected with flowmeter is provided with flowmeter inlet valve; The pipeline that flowmeter is connected with rising pipe is provided with variable valve.
A kind of pulse timing method of counting for fluid flow calibrating of the present invention, first cyclic water tank is filled with the water of more than 80% by it, weigh after water tank unwatering and remove the peel, commutator makes flow direction cyclic water tank, open pump intake valve respectively, pump discharge valve, flowmeter inlet valve, by water pump and variable valve, after adjust flux arrives certified value, commutator commutates, current direction is made to weigh in water tank, washer on commutator can block optoelectronic switch and produce trigger pip, trigger pip passes to pulse timing counting assembly, start timing and counting, when the water in water tank of weighing reaches predetermined quality, commutator commutation stops timing and counting, record the quality of weighing, timing time and umber of pulse N, instrument coefficient and the uncertainty of flowmeter is calculated according to vertification regulation, the counting mode of pulse timing counting assembly has two kinds, and one is trigger action pattern, and one is long letter trigger mode, can realize recording commutating period in verification process poor, at the integrated flow of flowmeter use procedure recording flowmeter.
A kind of pulse timing method of counting for fluid flow calibrating as above, trigger action pattern described in it, when to start control inputs in level triggers module be high level, this function enable, when gating pulse one is the signal of optoelectronic switch generation, first rising edge that optoelectronic switch produces, timer, counter O reset, and by timer, counter is enable, the umber of pulse that chronoscope digital-to-analogue BOB(beginning of block) record receives, when optoelectronic switch produces second rising edge, stop counting, in the process, the time t1 of first pulse can be recorded simultaneously, time t2 between first rising edge and second rising edge, time t3 between first rising edge and second negative edge, wherein t1 is for changing to the time, and t2 is the calibrating time, and the difference of t3 and t2 is the time of swapping out, difference △ t=|t3-t2-t1| commutating period in verification process,
Described long letter trigger mode, when in level triggers module, gating pulse two input receives rising edge, timer, counter do not reset, and timer, counter is enable, return pulse signal inputs, bulk registration, gating pulse two input receives negative edge and stops timing, counting, records to be added with cumulative time before by this time to draw cumulative time tc.
A kind of pulse timing method of counting for fluid flow calibrating as above, it is in timing counting process, the umber of pulse of record can be presented in display module in real time, and by operation push-button load module, the value can transferring t1, t2, t3, tc is presented in display module.
As above for a pulse timing method of counting for fluid flow calibrating, it is in timing counting process, and the umber of pulse of record can be presented in display module in real time; Keyboard input module has one group of button, by operative combination button, in conjunction with the content of display screen display, resets timing counting, arrange RS485 messaging parameter, also can show t1, t2, t3, tc and umber of pulse respectively or arrange alarm threshold value; After alarm threshold value transfinites, this alerting signal can show in display module, and exports digital quantity signal to output module; Communication module has RS485 interface, can pass through modbus485 agreement, reads the value of umber of pulse, t1, t2, t3, tc, also can arrange their alarm threshold value, read warning message, and reset.
Effect of the present invention is: the present invention is directed to the deficiency that in existing standard flow apparatus, the time is synchronous with count measurement, designs a kind of pulse timing counting assembly for fluid flow calibrating and method.By adopting the pulse timing counting assembly that the present invention relates to and method, can realize flow calibrating device timing, counting synchronous; Can detect that the commutating period that commutator commutates at every turn is poor simultaneously, can alarm be produced when pulse is transfinited or commutating period transfinites.
Accompanying drawing explanation
Fig. 1 is fluid flow device schematic diagram;
Fig. 2 is pulse timing counting assembly schematic diagram;
Fig. 3 trigger action pattern sequential chart;
Fig. 4 long letter trigger mode sequential chart;
In figure: 1. washer; 2. optoelectronic switch; 3. commutator; 4. to weigh water tank; 5. rising pipe; 6. electronic scales; 7. pump intake valve; 8. cyclic water tank; 9. pulse timing counting assembly; 10. water pump; 11. pump discharge valves; 12. buffer tanks; 13. flowmeter inlet valves; 14. flowmeters; 15. variable valve; 16. cyclic water tank entrances; 21. master controllers; 22. timing counting modules; 23. communication modules; 24. keyboard input modules; 25. level triggers modules; 26. display modules; 27. output modules; 31. start control inputs; 32. gating pulses one; 33. counter enabled state; 41. gating pulses two; 42. counter enabled state.
Embodiment
Below in conjunction with the drawings and specific embodiments, a kind of pulse timing counting assembly for fluid flow calibrating of the present invention and method are further described.
Embodiment 1
A kind of pulse timing counting assembly for fluid flow calibrating of the present invention, this device is used for fluid flow device, and it arranges pulse timing counting assembly 9 above the flowmeter 14 of fluid flow device;
As shown in Figure 1, described fluid flow device comprises cyclic water tank 8, and cyclic water tank 8 connects water pump 10 by pipeline; Water pump 10 connects buffer tank 12 by pipeline, and buffer tank 12 is by pipeline connection traffic meter 14, and flowmeter 14 connects the rising pipe 5 be arranged on above commutator 2 by pipeline; Above cyclic water tank 8, arrange electronic scales 6, water tank 4 of weighing placed by electronic scales 6, and water tank 4 side of weighing is cyclic water tank entrance 16; Commutator 3 is arranged on weigh water tank 4 and cyclic water tank entrance top, and rising pipe 5 is arranged on above commutator 3; This rising pipe 5 side, with washer 1, is provided with optoelectronic switch 2 with the commutator 3 of its corresponding position; Be provided with water delivering orifice bottom commutator 3, by the conversion of commutator 3 position, the water that rising pipe 5 is flowed out its only flow into cyclic water tank entrance 16 or only inflow to weigh water tank 4;
The pipeline that cyclic water tank 8 is connected with water pump 10 is provided with pump intake valve 7; The pipeline that water pump 10 is connected with buffer tank 12 is provided with pump discharge valve 11; The pipeline that buffer tank 12 is connected with flowmeter 14 is provided with flowmeter inlet valve 13; The pipeline that flowmeter 15 is connected with rising pipe 17 is provided with variable valve 15.
As shown in Figure 2, described pulse timing counting assembly 9 comprises master controller 21, each external module work coordinated by master controller 21, and external module comprises timing counting module 22, communication module 23, keyboard input module 24, level triggers module 25, display module 26, output module 27; Wherein, the pulse signal that timing counting module 22 flow meter 14 produces counts, and carries out enable according to the trigger pip pulse count function of level triggers module 25; Timing, tally function use the same processor in this module to complete, and ensure the synchronous of time reference; In timing, counting process, the umber of pulse of record can be presented in display module 26 in real time; Keyboard input module 24 has one group of button, by operative combination button, in conjunction with the content of display screen display, can reset, arrange messaging parameter timing counting; Communication module 23 has RS485 interface, by modbus485 agreement, reads umber of pulse.
Embodiment 2
Adopt the pulse timing method of counting of the pulse timing counting assembly for fluid flow calibrating described in embodiment 1, its step is as follows:
First cyclic water tank 8 is filled with the water of more than 80%, weigh after water tank 4 unwatering and remove the peel, commutator 5 makes flow direction cyclic water tank 8, open pump intake valve 7 respectively, pump discharge valve 11, flowmeter inlet valve 13, by water pump 10 and variable valve 15, after adjust flux arrives certified value, commutator 3 commutates, current direction is made to weigh in water tank 4, washer 1 on commutator 3 can block optoelectronic switch 2 and produce trigger pip, trigger pip passes to pulse timing counting assembly 9, start timing and counting, when the water in water tank 4 of weighing reaches predetermined quality, commutator 3 commutates and stops timing and counting, record the quality of weighing, the time of timer and the umber of pulse N of counter, instrument coefficient and the uncertainty of flowmeter is calculated according to vertification regulation,
The counting mode of pulse timing counting assembly has two kinds, and one is trigger action pattern, and one is long letter trigger mode, can realize recording commutating period in verification process poor, at the integrated flow of flowmeter use procedure recording flowmeter.Specific as follows:
As shown in Figure 3, described trigger action pattern, when starting control inputs 31 in level triggers module 25 for high level, this function enable, when gating pulse 1 is the signal of optoelectronic switch 2 generation, first rising edge that optoelectronic switch 2 produces, timer, counter O reset, and by timer, counter is enable, timing counting module 22 starts to record the umber of pulse received, when optoelectronic switch 2 produces second rising edge, stop counting, in the process, the time t1 of first pulse can be recorded simultaneously, time t2 between first rising edge and second rising edge, time t3 between first rising edge and second negative edge, wherein t1 is for changing to the time, and t2 is the calibrating time, and the difference of t3 and t2 is the time of swapping out, difference △ t=|t3-t2-t1| commutating period in verification process,
As shown in Figure 4, described long letter trigger mode, when in level triggers module 25, gating pulse 2 41 input receives rising edge, timer, counter do not reset, and timer, counter is enable, return pulse signal inputs, bulk registration, gating pulse two input receives negative edge and stops timing, counting, records to be added with cumulative time before by this time to draw cumulative time tc.
In timing counting process, the umber of pulse of record can be presented in display module 26 in real time; Keyboard input module 24 has one group of button, by operative combination button, in conjunction with the content of display screen display, resets timing counting, arrange RS485 messaging parameter, also can show t1, t2, t3, tc and umber of pulse respectively or arrange alarm threshold value; After alarm threshold value transfinites, this alerting signal 26 to show in display module, and exports digital quantity signal to output module 27; Communication module 23 has RS485 interface, can pass through modbus485 agreement, reads the value of umber of pulse, t1, t2, t3, tc, also can arrange their alarm threshold value, read warning message, and reset.
In the present invention when commutator 3 side starts to enter opposite side, washer 1 starts to trigger optoelectronic switch 2, when commutator 3 enters opposite side completely, the trigger pip of optoelectronic switch 2 disappears, realize commutator 3 thus in commutation process, make optoelectronic switch 2 produce two pulses, these two pulses are respectively the time of changing to and swap out the time.The timing of pulse timing counting assembly and counting module adopt same crystal oscillator generation time benchmark, ensure the synchronism of timing and counting.
Claims (6)
1. for a pulse timing counting assembly for fluid flow calibrating, this device is used for fluid flow device, it is characterized in that: arrange pulse timing counting assembly (9) in flowmeter (14) top of fluid flow device;
Described fluid flow device comprises cyclic water tank (8), and cyclic water tank (8) connects water pump (10) by pipeline; Water pump (10) connects buffer tank (12) by pipeline, buffer tank (12) is by pipeline connection traffic meter (14), and flowmeter (14) connects the rising pipe (5) being arranged on commutator (2) top by pipeline; Arrange electronic scales (6) in cyclic water tank (8) top, the upper placement of electronic scales (6) is weighed water tank (4), and water tank of weighing (4) side is cyclic water tank entrance (16); Commutator (3) is arranged on water tank of weighing (4) and cyclic water tank entrance top, and rising pipe (5) is arranged on commutator (3) top; This rising pipe (5) side, with washer (1), is provided with optoelectronic switch (2) with the commutator (3) of its corresponding position; Commutator (3) bottom is provided with water delivering orifice, by the conversion of commutator (3) position, the water that rising pipe (5) is flowed out its only flow into cyclic water tank entrance (16) or only flow into and to weigh water tank (4);
Described pulse timing counting assembly (9) comprises master controller (21), each external module work coordinated by master controller (21), and external module comprises timing counting module (22), communication module (23), keyboard input module (24), level triggers module (25), display module (26), output module (27); Wherein, the pulse signal that timing counting module (22) flow meter (14) produces counts, and carries out enable according to the trigger pip pulse count function of level triggers module (25); Timing, tally function use the same processor in this module to complete, and ensure the synchronous of time reference; In timing, counting process, the umber of pulse of record can be presented in display module (26) in real time; Keyboard input module (24) has one group of button, by operative combination button, in conjunction with the content of display screen display, can reset, arrange messaging parameter timing counting; Communication module (23) has RS485 interface, by modbus485 agreement, reads umber of pulse.
2. a kind of pulse timing counting assembly for fluid flow calibrating according to claim 1, is characterized in that: on the pipeline that cyclic water tank (8) is connected with water pump (10), be provided with pump intake valve (7); The pipeline that water pump (10) is connected with buffer tank (12) is provided with pump discharge valve (11); The pipeline that buffer tank (12) is connected with flowmeter (14) is provided with flowmeter inlet valve (13); The pipeline that flowmeter (15) is connected with rising pipe (17) is provided with variable valve (15).
3. adopt a pulse timing method of counting for the pulse timing counting assembly for fluid flow calibrating according to claim 1, it is characterized in that:
First cyclic water tank (8) is filled with the water of more than 80%, weigh after water tank (4) unwatering and remove the peel, commutator (5) makes flow direction cyclic water tank (8), open pump intake valve (7) respectively, pump discharge valve (11), flowmeter inlet valve (13), by water pump (10) and variable valve (15), after adjust flux arrives certified value, commutator (3) commutates, current direction is made to weigh in water tank (4), washer (1) on commutator (3) can block optoelectronic switch (2) and produce trigger pip, trigger pip passes to pulse timing counting assembly (9), start timing and counting, when the water in water tank of weighing (4) reaches predetermined quality, commutator (3) commutation stops timing and counting, record the quality of weighing, timing time and umber of pulse N, instrument coefficient and the uncertainty of flowmeter is calculated according to vertification regulation,
The counting mode of pulse timing counting assembly has two kinds, and one is trigger action pattern, and one is long letter trigger mode, can realize recording commutating period in verification process poor, at the integrated flow of flowmeter use procedure recording flowmeter.
4. a kind of pulse timing method of counting for fluid flow calibrating according to claim 3, is characterized in that:
Described trigger action pattern, when starting control inputs (31) for high level in level triggers module (25), this function enable, when gating pulse one (32) is the signal that optoelectronic switch (2) produces, first rising edge that optoelectronic switch (2) produces, timer, counter O reset, and by timer, counter is enable, timing counting module (22) starts to record the umber of pulse received, when optoelectronic switch (2) produces second rising edge, stop counting, in the process, the time t1 of first pulse can be recorded simultaneously, time t2 between first rising edge and second rising edge, time t3 between first rising edge and second negative edge, wherein t1 is for changing to the time, and t2 is the calibrating time, and the difference of t3 and t2 is the time of swapping out, difference △ t=|t3-t2-t1| commutating period in verification process,
Described long letter trigger mode, when in level triggers module (25), gating pulse two (41) input receives rising edge, timer, counter do not reset, and timer, counter is enable, return pulse signal inputs, bulk registration, gating pulse two input receives negative edge and stops timing, counting, records to be added with cumulative time before by this time to draw cumulative time tc.
5. a kind of pulse timing method of counting for fluid flow calibrating according to claim 4, it is characterized in that: in timing counting process, the umber of pulse of record can be presented in display module (26) in real time, by operation push-button load module (24), the value can transferring t1, t2, t3, tc is presented in display module (26).
6. a kind of pulse timing method of counting for fluid flow calibrating according to claim 4, it is characterized in that: in timing counting process, the umber of pulse of record can be presented in display module (26) in real time; Keyboard input module (24) has one group of button, by operative combination button, in conjunction with the content of display screen display, timing counting is reset, arranges RS485 messaging parameter, also can show t1, t2, t3, tc and umber of pulse respectively or arrange alarm threshold value; After alarm threshold value transfinites, this alerting signal (26) can show in display module, and exports digital quantity signal to output module (27); Communication module (23) has RS485 interface, can pass through modbus485 agreement, reads the value of umber of pulse, t1, t2, t3, tc, also can arrange their alarm threshold value, read warning message, and reset.
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Cited By (8)
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| CN104776896A (en) * | 2015-03-30 | 2015-07-15 | 东南大学 | Dynamic verification system and method of liquid flow instrument |
| CN105509844A (en) * | 2015-11-23 | 2016-04-20 | 华南理工大学 | Open type commutator calibration method for general liquid flow calibrating apparatus |
| CN105662158A (en) * | 2016-01-13 | 2016-06-15 | 北京婴萌科技有限公司 | Liquid discharge device and calibration device thereof |
| CN105955005A (en) * | 2016-07-01 | 2016-09-21 | 上海市同济医院 | Cardiopulmonary resuscitation timing beat meter and method |
| CN106129476A (en) * | 2016-08-25 | 2016-11-16 | 无锡溥汇机械科技有限公司 | A kind of lithium ion battery barrier film slurry spin coating system |
| CN110632885A (en) * | 2019-07-12 | 2019-12-31 | 南京意瑞可科技有限公司 | Waste liquid collection supervision method |
| CN110853200A (en) * | 2019-11-29 | 2020-02-28 | 河南职业技术学院 | Device for limiting number of people in closed occasions |
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| CN104776896A (en) * | 2015-03-30 | 2015-07-15 | 东南大学 | Dynamic verification system and method of liquid flow instrument |
| CN104776896B (en) * | 2015-03-30 | 2018-02-23 | 东南大学 | A kind of fluid flow instrument dynamic calibration system and method |
| CN105509844B (en) * | 2015-11-23 | 2018-09-28 | 华南理工大学 | A kind of universal liquid flowrate calibrating device open commutator calibration method |
| CN105509844A (en) * | 2015-11-23 | 2016-04-20 | 华南理工大学 | Open type commutator calibration method for general liquid flow calibrating apparatus |
| CN105662158A (en) * | 2016-01-13 | 2016-06-15 | 北京婴萌科技有限公司 | Liquid discharge device and calibration device thereof |
| CN105662158B (en) * | 2016-01-13 | 2018-11-13 | 北京婴萌科技有限公司 | Liquid discharge device and its calibrating installation |
| CN105955005A (en) * | 2016-07-01 | 2016-09-21 | 上海市同济医院 | Cardiopulmonary resuscitation timing beat meter and method |
| CN106129476A (en) * | 2016-08-25 | 2016-11-16 | 无锡溥汇机械科技有限公司 | A kind of lithium ion battery barrier film slurry spin coating system |
| CN110632885A (en) * | 2019-07-12 | 2019-12-31 | 南京意瑞可科技有限公司 | Waste liquid collection supervision method |
| CN110632885B (en) * | 2019-07-12 | 2024-02-20 | 南京意瑞可科技有限公司 | Waste liquid collection supervision method |
| CN110853200A (en) * | 2019-11-29 | 2020-02-28 | 河南职业技术学院 | Device for limiting number of people in closed occasions |
| CN110853200B (en) * | 2019-11-29 | 2021-10-26 | 河南职业技术学院 | Device for limiting number of people in closed occasions |
| CN114370899A (en) * | 2022-01-18 | 2022-04-19 | 上海交通大学 | LNG tank wagon unloads liquid measurement system with position monitoring function |
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