CN107643116A - A kind of water meter rotating speed scaling method, system and device - Google Patents

Abstract

The invention discloses a kind of indicator of water gauge rotating speed scaling method, system and device, three light sources is installed above water meter, and three light sources irradiate the black of same water meter or red plum blossom pointer simultaneously；Effective impulse number is made to be initialized as 0；The voltage pulse signal of three light sources is gathered simultaneously；If in a cycle T, arbitrarily voltage pulse signal has and only two rising edges or two trailing edges all the way, then the value of effective impulse number adds 1, the total D of effective impulse number in timing statisticses section t1~t2；The rotating speed V of indicator of water gauge is calculated using following formula：V=D/(t2‑t1)；Wherein, t2 t1 >=T.The present invention can effectively prevent that it is accurate to count, and method is simple, easily realizes because there is bubble either pulse by mistake caused by shake or remaining interference at indicator of water gauge.

Description

A kind of water meter rotating speed scaling method, system and device

Technical field

The present invention relates to a kind of indicator of water gauge rotating speed scaling method and device.

Background technology

Existing indicator of water gauge rotating speed scaling method irradiates a black plum blossom pointer using a light source or red refers to Pin, there is bubble either shake or when remaining interference at indicator of water gauge, be easy for producing pulse by mistake, cause to count inaccurate Really.

The content of the invention

The technical problems to be solved by the invention are, in view of the shortcomings of the prior art, providing a kind of indicator of water gauge rotating speed demarcation Method, system and device, prevent because having bubble either pulse by mistake caused by shake or remaining interference, accurate meter at indicator of water gauge Number.

In order to solve the above technical problems, the technical solution adopted in the present invention is：A kind of indicator of water gauge rotating speed demarcation side Method, comprise the following steps：

1）Three light sources are installed above water meter, and three light sources irradiate the black of same water meter simultaneously or red plum blossom refers to Pin；Effective impulse number is made to be initialized as 0；

2）The voltage pulse signal of three light sources is gathered simultaneously；

3）If in a cycle T, arbitrarily voltage pulse signal has and only two rising edges or two trailing edges all the way, then The value of effective impulse number adds 1, the total D of effective impulse number in timing statisticses section t1~t2；

4）The rotating speed V of indicator of water gauge is calculated using following formula：V=D/(t2-t1)；Wherein, t2-t1 >=T.

Corresponding to the above method, present invention also offers a kind of indicator of water gauge rotating speed calibration system, it includes：

Acquisition module：For gathering the voltage pulse signal for three light sources being installed on above water meter；Wherein described three light sources Irradiate the black of same water meter or red plum blossom pointer simultaneously；

Counting module：For counting in a cycle T, when arbitrarily all the way voltage pulse signal have and only two rising edges or During two trailing edges so that the value of effective impulse number adds 1, and in timing statisticses section t1~t2 effective impulse number total D；

Computing module：For calculating the rotating speed V of indicator of water gauge using following formula：V= D/(t2-t1)；Wherein, t2-t1 >=T.

Accordingly, present invention also offers one kind to realize above method indicator of water gauge rotating speed caliberating device, including：

Three light sources being installed on above each water meter, and three light sources irradiate the black of same water meter or red plum simultaneously Flower pointer；

For gathering the acquisition chip of the voltage pulse signal of three light sources corresponding to each water meter；And

The communication module being connected with the acquisition chip.

The acquisition chip includes：

Six counters, wherein the rising edge number of three counter records voltage pulse signals, a counter records are per road The effective impulse number of voltage pulse signal, two other counter record demarcation time started and end time respectively.

Compared with prior art, the advantageous effect of present invention is that：The present invention can be prevented effectively because of indicator of water gauge There are bubble either shake or the caused pulse by mistake of remaining interference in place, and it is accurate to count, and method is simple, easily realization.

Brief description of the drawings

Fig. 1 is the inventive method schematic diagram.

Embodiment

Such as Fig. 1, by taking three light sources as an example, if three road pulse signals are respectively 1,2,3 caused by three light sources, due to three light The black plum blossom pointer of same water meter is irradiated in source simultaneously, and all cycles are essentially identical, it is assumed that any mutually corresponding week in the same time It is normal always to have two paths of signals in phase, therefore the moment abnormal that road letter can be weeded out using two-way normal signal Number, specific practice is as follows：

Design circuit and include clock and at least chip, communication module and peripheral circuit of three road I/O mouths etc., open up counter A, B, C, D, E, F, the rising edge number of 1,2,3 road signals, D record effective impulse numbers, E, F record time, Ke Yitong are recorded respectively Oversampling circuit button starts to record the rising edge of three road signals respectively by the extraneous instruction of the receiving that communicates, it is assumed that first from the graph Dotted line position assigns sign on, then when reaching the Article 2 dotted line moment, A=A+1, E=t1.

B=B+1 successively, C=C+1, A=A+1, when reaching the Article 3 dotted line position moment, B=B+1, at this moment meet A≤2 And the condition of B≤2（Any two are more than or equal to 2 in ABC）, then D=D+1, A=A-1, B=B-1, C=C-1.

The rest may be inferred, and until being connected to END instruction, F=t2, the rotating speed of water meter is D/ (t2-t1).

Claims (4)

1. a kind of indicator of water gauge rotating speed scaling method, it is characterised in that comprise the following steps：

1）Three light sources are installed above water meter, and three light sources irradiate the black of same water meter simultaneously or red plum blossom refers to Pin；Effective impulse number is made to be initialized as 0；

2）The voltage pulse signal of three light sources is gathered simultaneously；

3）If in a cycle T, arbitrarily voltage pulse signal has and only two rising edges or two trailing edges all the way, then The value of effective impulse number adds 1, the total D of effective impulse number in timing statisticses section t1~t2；

The rotating speed V of indicator of water gauge is calculated using following formula：V= D/(t2-t1)；Wherein, t2-t1 >=T.

A kind of 2. indicator of water gauge rotating speed calibration system, it is characterised in that including：

Acquisition module：For gathering the voltage pulse signal for three light sources being installed on above water meter；Wherein described three light sources Irradiate the black of same water meter or red plum blossom pointer simultaneously；

Counting module：For counting in a cycle T, when arbitrarily all the way voltage pulse signal have and only two rising edges or During two trailing edges so that the value of effective impulse number adds 1, and in timing statisticses section t1~t2 effective impulse number total D；

Computing module：For calculating the rotating speed V of indicator of water gauge using following formula：V= D/(t2-t1)；Wherein, t2-t1 >=T.

A kind of 3. indicator of water gauge rotating speed caliberating device for realizing claim 1 methods described, it is characterised in that including：

Three light sources being installed on above each water meter, and three light sources irradiate the black of same water meter or red plum simultaneously Flower pointer；

For gathering the acquisition chip of the voltage pulse signal of three light sources corresponding to each water meter；And

The communication module being connected with the acquisition chip.

4. caliberating device according to claim 3, it is characterised in that the acquisition chip includes：

Six counters, wherein the rising edge number of three counter records voltage pulse signals, a counter records are per road The effective impulse number of voltage pulse signal, two other counter record demarcation time started and end time respectively.