CN103616060B - The flexible relevant micro-flow measurement device of a kind of tertiary circulation shape - Google Patents

Abstract

The present invention relates to the flexible relevant micro-flow measurement device of a kind of tertiary circulation shape, belong to flow monitoring technical field. This measurement mechanism is by the signal processing circuit board chamber (3) that is placed with signal processing circuit board in it, part is placed in the output signal channel (1) of signal processing circuit board chamber (3), be placed in and meet the will of failing to be sold at auction (2) on output signal channel (1), be placed in below, signal processing circuit board chamber (3) and the flexible collection signal transmission channel of ring packing (4) that is connected with output signal channel (1) one end forms; Wherein: in the flexible collection signal transmission channel of ring packing (4), be connected with first sensor (5), the second sensor (6) and the 3rd sensor (7). The present invention has advantages of simple in structure, successful, has improved miniflow and has detected correlation, continuity and the accuracy of detection measured.

Description

The flexible relevant micro-flow measurement device of a kind of tertiary circulation shape

Technical field:

The present invention relates to the flexible relevant micro-flow measurement device of a kind of tertiary circulation shape, belong to flow monitoring technical field.

Background technology:

In recent years, scientific research and industrial production become more meticulous to develop tiny flow quantity detection method and accuracy have been proposedRequirements at the higher level. But because miniflow is conventionally in micro-change condition current downflow, can survey scope less, use is commonly used at presentThere is following defect to its detection in the relevant flow measurement device of the linear rigidity of secondary: 1, secondary measurement structure cannotThe completely level and smooth noise of measuring, measurement result is unstable. 2, certainty of measurement is not high. 3, linear structure correlation is notGood. 4, rigidity measurement mechanism intrinsic frequency has impact to measurement result. 5, install and measure installation method and pipeRoad material is relevant. The relevant flow measurement device of secondary rigidity is wanted for meeting various micrometeors detections both at home and abroad at presentAsk, have a significant improvement in following several respects: 1, improve antijamming capability. 2, improve sensor measurement performance.3, improve manufacture craft, improve linear structure correlation. 4, use the new material of making. But the linear rigidity of secondaryFlow measurement of correlation device is subject to the restriction of physical characteristic and architectural feature, still causes commonly using at present the linear rigidity of secondaryCorrelative flow checkout gear cannot meet the true requirement that micrometeor detects completely.

By literature search, do not find the relevant open of the correlative flow checkout gear identical with technical solution of the present inventionReport.

Summary of the invention:

The object of the invention is to overcome the linear rigidity flow of existing secondary related detection device examines tiny flow quantityThe deficiency of survey, provides a kind of tertiary circulation shape flexible relevant micro-flow measurement device.

The flexible relevant micro-flow measurement device of a kind of tertiary circulation shape of the present invention, processes electricity by being placed with signal in itThe signal processing circuit board chamber (3) of road plate, part is placed in the output signal of signal processing circuit board chamber (3)Passage (1), is placed in and meets the will of failing to be sold at auction (2) on output signal channel (1), is placed in signal processing circuit board chamber(3) below the ring packing flexibility collection signal transmission channel that is connected with output signal channel (1) one end(4) composition; Wherein: in the flexible collection signal transmission channel of ring packing (4), be connected with first sensor (5),The second sensor (6) and the 3rd sensor (7), first sensor (5), the second sensor (6) and the 3rdBetween sensor (7), distance equates, by first sensor (5) and the second sensor (6), and the second sensingThe miniflow random noise signal that device (6) and the 3rd sensor (7) gather is passed by the flexible collection signal of ring packingDefeated passage (4) is transferred to the signal processing circuit board of placing in signal processing circuit board chamber (3), signal processingResult output to external demonstration memory device by output signal channel (1).

The present invention's device used is that market is bought.

That the present invention has advantages of is simple in structure, successful, miniflow accuracy of detection are high.

Brief description of the drawings:

Fig. 1 is structural representation of the present invention.

Fig. 2 is the structural representation of measuring state of the present invention.

Detailed description of the invention:

The present invention's device used is that market is bought. Its assembly connection as shown in Figure 1.

The flexible relevant micro-flow measurement device of a kind of tertiary circulation shape of the present invention, processes electricity by being placed with signal in itThe signal processing circuit board chamber 3 of road plate, part is placed in the output signal channel 1 in signal processing circuit board chamber 3,Be placed in the will 2 of failing to be sold at auction of meeting on output signal channel 1, be placed in 3 belows, signal processing circuit board chamber and with outputThe flexible collection signal transmission channel 4 of ring packing that signalling channel 1 one end connects forms; Wherein: ring packingIn flexible collection signal transmission channel 4, be connected with first sensor 5, the second sensor 6 and the 3rd sensor 7,Between first sensor 5, the second sensor 6 and the 3rd sensor 7, distance equates, by first sensor 5 HesThe second sensor 6, and the miniflow random noise signal that the second sensor 6 and the 3rd sensor 7 gather is by annularSealed soft collection signal transmission channel 4 is transferred to the signal processing circuit of signal processing circuit board chamber 3 interior placementsPlate, the result of signal processing outputs to external demonstration memory device by output signal channel 1.

When use, by the measurement mechanism shown in Fig. 1 by meet will 2 pointing directions of failing to be sold at auction meet banish monitor at needs micro-The position (as shown in Figure 2) of flow, and be connected with external demonstration memory device. Open external demonstration storageEquipment, shows the measured flow velocity of storage and flow value. For ensureing miniflow flow measurement accuracy, need guarantee smallFluid flows to first sensor 5 and the second sensor 6, and between the second sensor 6 and the 3rd sensor 7Geometry is substantially without impact.

Flow measurement process is as follows:

The first step: the miniflow that collection first sensor 5, the second sensor 6 and the 3rd sensor 7 detect is randomNoise signal X₅(t_i)、X₆(t_i) and X₇(t_i), access letter by the flexible collection signal transmission channel 4 of ring packingNumber treatment circuit plate chamber 3. Wherein measure number of times 1≤i≤100, Measuring Time 0≤t_i≤ T, T enough surveysGo out the time of miniflow flow velocity.

Second step: the signal processing circuit board of signal processing circuit board chamber 3 interior placements is to input signal X₅(t_i)、X₆(t_i) and X₇(t_i) process to obtain t_iMoment miniflow speed, detailed process is:

(a) by signal X₅(t_i) and X₆(t_i) delay time T, 0≤τ≤T obtains X₅(t_i+τ)、X₆(t_i+τ)；

(b) calculate X₅(t_i)、X₆(t_i) and X₆(t_i)、X₇(t_i) for the cross correlation value of different value τ:

$R_{X_5{X}_6}(\mathrm{\τ},T)=\frac{1}{T}\underset{0}{\overset{T}{\∫}}{X}_5(t_i+\mathrm{\τ})X_6\left(t_i\right){\mathrm{dt}}_i$

$R_{X_6{X}_7}(\mathrm{\τ},T)=\frac{1}{T}\underset{0}{\overset{T}{\∫}}{X}_6(t_i+\mathrm{\τ})X_7\left(t_i\right)d{t}_i$

(c) relativelyWithObtain respectively the corresponding delay time T of its maximum₁、τ₂。

(d) by distance d between sensor and the corresponding delay time T of maximum₁、τ₂Calculate miniflow speed。

$v_{t_i}=\frac{1}{2}(\frac{d}{{\mathrm{\τ}}_1}+\frac{d}{{\mathrm{\τ}}_2})$

The 3rd step: calculate and remove error miniflow mean flow rate

$\stackrel{\‾}{v}=v_{t_1},$ Work as i=1; $\stackrel{\‾}{v}=\frac{\stackrel{\‾}{v}+v_{t_i}}{2},$ When i >=2.

The 4th step: according to going error miniflow speedObtain miniflow flow Q.

Claims (1)

1. the flexible relevant micro-flow measurement device of tertiary circulation shape, it is characterized in that this measurement mechanism is by the signal processing circuit board chamber (3) that is placed with signal processing circuit board in it, part is placed in the output signal channel (1) of signal processing circuit board chamber (3), be placed in and meet the will of failing to be sold at auction (2) on output signal channel (1), be placed in below, signal processing circuit board chamber (3) and the flexible collection signal transmission channel of ring packing (4) that is connected with output signal channel (1) one end forms, wherein: in the flexible collection signal transmission channel of ring packing (4), be connected with first sensor (5), the second sensor (6) and the 3rd sensor (7), first sensor (5), between the second sensor (6) and the 3rd sensor (7), distance equates, by first sensor (5) and the second sensor (6), and second the miniflow random noise signal that gathers of sensor (6) and the 3rd sensor (7) be transferred to the signal processing circuit board of placing in signal processing circuit board chamber (3) by the flexible collection signal transmission channel of ring packing (4), the result of signal processing outputs to external demonstration memory device by output signal channel (1),

This measurement mechanism flow measurement process is as follows:

The first step: gather the miniflow random noise signal X that first sensor (5), the second sensor (6) and the 3rd sensor (7) detect₅(t_i)、X₆(t_i) and X₇(t_i), by the flexible collection signal transmission channel of ring packing (4) access signal processing circuit board chamber (3), wherein measure number of times 1≤i≤100, Measuring Time 0≤t_i≤ T, T is the time of enough measuring miniflow flow velocity;

Second step: the signal processing circuit board of placing in signal processing circuit board chamber (3) is to input signal X₅(t_i)、X₆(t_i) and X₇(t_i) process to obtain t_iMoment miniflow speed v_ti, detailed process is:

(a) by signal X₅(t_i) and X₆(t_i) delay time T, 0≤τ≤T obtains X₅(t_i+τ)、X₆(t_i+τ)；

(b) calculate X₅(t_i)、X₆(t_i) and X₆(t_i)、X₇(t_i) for the cross correlation value of different value τ:

(c) relativelyWithObtain respectively the corresponding delay time T of its maximum₁、τ₂；

(d) by distance d between sensor and the corresponding delay time T of maximum₁、τ₂Calculate miniflow speed

The 3rd step: calculate and remove error miniflow mean flow rate

Work as i=1;When i >=2; The 4th step: according to going error miniflow speedObtain miniflow flow Q.