CN105823533A

CN105823533A - Double-clock detecting method for flowmeter

Info

Publication number: CN105823533A
Application number: CN201610427097.3A
Authority: CN
Inventors: 余小宝; 洪浩
Original assignee: NINGBO MINGTAI TRAFFIC EQUIPMENT CO Ltd
Current assignee: NINGBO MINGTAI TRAFFIC EQUIPMENT CO Ltd
Priority date: 2016-06-17
Filing date: 2016-06-17
Publication date: 2016-08-03

Abstract

The invention relates to a method for detecting a flowmeter, in particular to an embedded water meter recognizer. The method totally comprises the six steps, and whether the flowmeter to be detected is qualified or not is detected mainly by calculating whether the difference value between the mass of fluid passing through the flowmeter to be detected within unit time and the mass of fluid weighed by an electronic scale within the unit time is within the error value range or not. Compared with the prior art, whether the flowmeter is qualified or not can be detected fast and precisely by measuring and calculating the conversion comparison of the weight weighed by the electronic scale within the unit time with the flow of the flowmeter to be detected, and the problems that during previous detection, consumed time is long, and water resources are consumed are solved.

Description

A kind of flow meter doubleclocking detection method

Technical field

The present invention relates to the calibration method of a kind of flow meter.

Background technology

Calibrating commonly used single clock checking method to flow meter at present, such as by traditional photoelectric acquisition technology, respectively two pulse signals of standard scale and table to be measured are measured in the range of at the same time, the error of metering is generally between a pulse to two pulse, so calculate by 0.2 grade of the most conventional flow meter, in order to ensure certainty of measurement, during one-shot measurement, the required umber of pulse gathered will more than 10000, for being exactly the relatively low water meter of ratio of precision, the most also to gather 1000 pulses.Calculate by DN15 water meter, the umber of pulse of water meter turbine can be collected in system by laser probe, the minimum pointer of general water meter often encloses as 1L, the rotating ratio of impeller substantially 10, calculating by each impeller 6 tooth, will gather 400 pulses substantially needs the water consumption to be: L=400/10/6=6.6 rises by the calculating of minimum discharge 24L/h, needs 17 minutes, if using the standard measuring device metering of 10L, the required time is longer.The obvious time-consuming long water consumption of existing flow meter calibration method is big, is unfavorable for the extensive calibrating of flow meter.

Summary of the invention

The present invention is directed to deficiency of the prior art, provide a kind of flow meter doubleclocking detection method, it is the most qualified that the weight that this method is claimed by electronic scale in the measuring and calculating unit interval and the conversion of flow-meter to be measured contrast can examine and determine flow meter the most accurately, solve calibrating in the past time-consuming long, the problem of consumption of water resource.

In order to solve above-mentioned technical problem, the present invention is addressed by following technical proposals: a kind of flow meter doubleclocking detection method, including diverter clock detector, table clock detector to be measured, table pulse collector to be measured, diverter, signal indicator and electronic scale, it is characterised in that include following step: step A): by signal indicator, diverter clock detector, table clock detector to be measured, table pulse collector to be measured, electronic scale are carried out signal communication with diverter；Step B): diverter and electronic scale are formed a path, a bypass organized separately by diverter simultaneously, it is used for recording the diverter time by diverter clock detector, is used for recording the table time to be measured by table clock detector to be measured, be used for recording table pulse to be measured by table pulse collector to be measured；Step C): bypass water flowing, by the current in diverter at the uniform velocity, and table water flowing to be measured, identical with diverter by surveying the flow rate of water flow of Biao Tongnei；Step D): diverter is current both electronic scale direction from bypass changeover to path, now diverter triggers commencing signal, diverter clock detector starts diverter is carried out timing, table pulse collector to be measured starts to collect table umber of pulse to be measured, table clock detector to be measured starts timing when table pulse collector to be measured collects first pulse, and electronic scale starts meter weight；Step E): diverter is switched to bypass current from path, now diverter triggers end signal, diverter clock detector, table clock detector to be measured, table pulse collector to be measured and electronic scale stop record after receiving end signal respectively, wherein diverter clock detector obtains the time t1 of diverter commutation start to finish, table clock detector to be measured obtains within the t1 time table inceptive impulse to be measured to the differential time t2 between final pulse, the volume V of flow in table to be measured in calculating the t2 time according to table clock detector to be measured and table pulse collector to be measured, the alleged fluid mass W1 obtained of electronic scale；Step F): arranging time error is K, K=t2/t1, and arranging standard quality is W2, W2=K*W1, arranges table quality W3=V* fluid density to be measured, finally compares W3 and W2, it is judged that whether the error of W3 Yu W2 is within normal value.

In technique scheme, it is preferred that described signal is photosignal.

In technique scheme, preferably, also include flow meter evaluator, described flow meter evaluator carries out signal communication by signal indicator and table clock detector to be measured, described flow meter evaluator starts to identify table instrumental panel reading to be measured after receiving first pulse signal of table clock detector to be measured, terminates to identify after receiving last pulse signal of table clock detector to be measured.

Single clock photoelectric detection method is generally passed through in calibrating to flow meter now, and this method is time-consumingly grown, water wasting is many, it usually needs expend at least 15 minutes and 10 liters of water could examine and determine a table to be measured.And this method changes the mode of existing calibrating, it is only necessary to just examined and determine a flow meter less time and in the case of the water yield.Firstly the need of allowing the current of two strands of phase same rates respectively by table to be checked and diverter, then diverter commutates to electronic scale direction, now carry out timing, until diverter commutates again by current.Being exactly t1 during this period of time, the weight that electronic scale claims within this t1 time is exactly W1, and in twice commutation of diverter, the time between table initial pulse to be measured and last pulse is t2, and now can obtain standard quality is W2=t2/t1*W1.Owing to table to be measured can directly read flow from its dial plate, it is readily obtained table quality W3=V* fluid density to be measured, just table to be measured can be instructed the most qualified by comparing W3 and W2.Because this method is being not the comparison by both sides' number of pulses, but directly by flows per unit time weight ratio relatively, it is only necessary to few water yield is with regard to energy accurate measure thus reaches a conclusion.

Compared with prior art, it is the most qualified that the weight that this method is claimed by electronic scale in the measuring and calculating unit interval and the conversion of flow-meter to be measured contrast can examine and determine flow meter the most accurately, solves calibrating in the past time-consuming long, the problem of consumption of water resource.

Detailed description of the invention

Below in conjunction with detailed description of the invention, the present invention is described in further detail.

Embodiment 1, a kind of flow meter doubleclocking detection method, including diverter clock detector, table clock detector to be measured, table pulse collector to be measured, diverter, signal indicator, flow meter evaluator and electronic scale, including following step: step A): by signal indicator, diverter clock detector, table clock detector to be measured, table pulse collector to be measured, electronic scale are carried out photosignal communication with diverter.Step B): diverter and electronic scale are formed a path, a bypass organized separately by diverter simultaneously, it is used for recording the diverter time by diverter clock detector, is used for recording the table time to be measured by table clock detector to be measured, be used for recording table pulse to be measured by table pulse collector to be measured.Step C): bypass water flowing, by the current in diverter at the uniform velocity, and table water flowing to be measured, identical with diverter by surveying the flow rate of water flow of Biao Tongnei.Step D): diverter is current both electronic scale direction from bypass changeover to path, now diverter triggers commencing signal, diverter clock detector starts diverter is carried out timing, table pulse collector to be measured starts to collect table umber of pulse to be measured, table clock detector to be measured starts timing when table pulse collector to be measured collects first pulse, and electronic scale starts meter weight；nullStep E): diverter is switched to bypass current from path，Now diverter triggers end signal，Diverter clock detector、Table clock detector to be measured、Table pulse collector to be measured and electronic scale stop record after receiving end signal respectively，Wherein diverter clock detector obtains the time t1 of diverter commutation start to finish，Table clock detector to be measured obtains within the t1 time table inceptive impulse to be measured to the differential time t2 between final pulse，The volume V of flow in table to be measured in calculating the t2 time according to table clock detector to be measured and table pulse collector to be measured，The alleged fluid mass W1 obtained of electronic scale，Flow meter evaluator starts to identify table instrumental panel reading to be measured after receiving first pulse signal of table clock detector to be measured，Terminate to identify after receiving last pulse signal of table clock detector to be measured.The flow volume that flow meter evaluator is surveyed at this moment is V.Step F): arranging time error is K, K=t2/t1, and arranging standard quality is W2, W2=K*W1, arranges table quality W3=V* fluid density to be measured, finally compares W3 and W2, it is judged that whether the error of W3 Yu W2 is within normal value.

The principle of this method is to measure quality W3 by table water to be measured in identical flow velocity of identical time and by weight W2 of water on electronic scale, and it is the most qualified to judge table to be measured to compare the difference between W3 and W2.A W2 not value directly measured, but the value converted by error, wherein W2=t2/t1*W1.The present invention changes in calibrating in the past needs standard scale and table to be measured to do the single clock Photoelectric Detection mode contrasted, it not the comparison by both sides' number of pulses, but directly by flows per unit time weight ratio relatively, it is only necessary to a small amount of flow and time just can carry out the calibrating of flow meter.

Claims

1. a flow meter doubleclocking detection method, including diverter clock detector, table clock detector to be measured, table pulse collector to be measured, diverter, signal indicator and electronic scale, it is characterised in that include following step: step A): by signal indicator, diverter clock detector, table clock detector to be measured, table pulse collector to be measured, electronic scale are carried out signal communication with diverter；Step B): diverter and electronic scale are formed a path, a bypass organized separately by diverter simultaneously, it is used for recording the diverter time by diverter clock detector, is used for recording the table time to be measured by table clock detector to be measured, be used for recording table pulse to be measured by table pulse collector to be measured；Step C): bypass water flowing, by the current in diverter at the uniform velocity, and table water flowing to be measured, identical with diverter by surveying the flow rate of water flow of Biao Tongnei；Step D): diverter is current both electronic scale direction from bypass changeover to path, now diverter triggers commencing signal, diverter clock detector starts diverter is carried out timing, table pulse collector to be measured starts to collect table umber of pulse to be measured, table clock detector to be measured starts timing when table pulse collector to be measured collects first pulse, and electronic scale starts meter weight；Step E): diverter is switched to bypass current from path, now diverter triggers end signal, diverter clock detector, table clock detector to be measured, table pulse collector to be measured and electronic scale stop record after receiving end signal respectively, wherein diverter clock detector obtains the time t1 of diverter commutation start to finish, table clock detector to be measured obtains within the t1 time table inceptive impulse to be measured to the differential time t2 between final pulse, the volume V of flow in table to be measured in calculating the t2 time according to table clock detector to be measured and table pulse collector to be measured, the alleged fluid mass W1 obtained of electronic scale；Step F): arranging time error is K, K=t2/t1, and arranging standard quality is W2, W2=K*W1, arranges table quality W3=V* fluid density to be measured, finally compares W3 and W2, it is judged that whether the error of W3 Yu W2 is within normal value.

A kind of flow meter doubleclocking detection method the most according to claim 1, is characterized by, described signal is photosignal.

A kind of flow meter doubleclocking detection method the most according to claim 1, it is characterized by, also include flow meter evaluator, described flow meter evaluator carries out signal communication by signal indicator and table clock detector to be measured, described flow meter evaluator starts to identify table instrumental panel reading to be measured after receiving first pulse signal of table clock detector to be measured, terminates to identify after receiving last pulse signal of table clock detector to be measured.