阅读说明：本技术 一种分区定位漏液检测系统和方法 (A kind of subregion positioning leakage detection system and method ) 是由 冯博 林祥龙 陈加正 于 2019-07-19 设计创作，主要内容包括：本发明公开了一种分区定位漏液检测系统和方法,该分区定位漏液检测系统通过平行设置的两根相同的感应线,在第一感应线上设置第一二极管来分区,并在两根感应线连接处设置反向的第二二极管,在分区的两端点对应两根平行设置的感应线上设置检测节点,每个检测节点都通过双控开关分别与恒流源和基准源相连,调控检测节点的双控开关导向,获取检测节点的电压。本发明可以检测整体布线区域是否漏夜,漏液发生的具体区域(第一区域或第二区域或两个区域均发生)以及漏液的具体位置,两个区域的漏液检测独立进行,互不干扰,适用于距离相隔很远的两个区域漏液检测,特别是能够检测两个区域同时发生漏液的具体位置的情况,适用性强。(The invention discloses a kind of subregion positioning leakage detection system and methods, the subregion positions leakage detection system and passes through two identical lines of induction disposed in parallel, first diode is set on first line of induction and carrys out subregion, and second diode reversed in two line of induction junction settings, detection node is set on corresponding two lines of induction disposed in parallel of two-end-point of subregion, each detection node passes through double control switch and is connected respectively with constant-current source and a reference source, the double control switch guiding for regulating and controlling detection node, obtains the voltage of detection node.Whether in the dead of night the present invention can detecte overall routing region, the specific location in specific region (first area or second area or two regions occur) and leakage that leakage occurs, the leakage detection in two regions is independent to be carried out, it does not interfere with each other, suitable for being detected apart from remote two region leakages, especially it is able to detect two regions while the specific location there is a situation where leakage, strong applicability.)

1. a kind of subregion positions leakage detection system, which is characterized in that the subregion leakage position detecting system includes setting in parallel It is placed in isometric first line of induction and second line of induction of first area and second area, is equipped with first in first line of induction Diode, the first area and the second area are separated by the first diode, the second end of first line of induction The second diode is connected between the second end of second line of induction, the first diode and second diode are anti- To setting,

The first end, described of the first end of first line of induction, the output end of the first diode, second line of induction The second end of output end and second line of induction that the first diode is corresponded in second line of induction is successively set as the first inspection Node, the second detection node, third detection node, the 4th detection node and the 5th detection node are surveyed,

First detection node, second detection node, the third detection node, the 4th detection node and described First voltage detection device, second voltage detection device, tertiary voltage detection device, the 4th are respectively equipped at 5th detection node Voltage check device and the 5th voltage check device,

The first voltage detection device, the second voltage detection device, the tertiary voltage detection device, the 4th electricity Press detection device and the 5th voltage check device respectively with the first double control switch, the second double control switch, third double control switch, 4th double control switch and the connection of the 5th double control switch,

First double control switch, second double control switch, the third double control switch, the 4th double control switch and described 5th double control switch, the first contact be connected with the constant-current source, the second contact is connected with a reference source.

2. subregion according to claim 1 positions leakage detection system, which is characterized in that first line of induction and described Second line of induction is the larger conducting wire with uniform resistance value of impedance.

3. subregion according to claim 1 positions leakage detection system, which is characterized in that the subregion leakage detection and localization System further includes filling respectively with the first voltage detection device, the second voltage detection device, tertiary voltage detection It sets, the subtracter that the 4th voltage check device is connected with the 5th voltage check device, the subtracter is for acquiring Pressure difference between the detection node.

4. subregion according to claim 3 positions leakage detection system, which is characterized in that the subregion leakage detection and localization System further includes the amplifier being connected with the subtracter, for amplifying the pressure difference.

5. subregion according to claim 1 to 4 positions leakage detection system, which is characterized in that the subregion leakage is fixed Position detecting system further includes that the microprocessor that is connected with the amplifier is used to judge whether leak according to the pressure difference, if so, Then calculate leak distance.

6. subregion according to claim 5 positions leakage detection system, which is characterized in that the subregion positioning leakage detection System further includes the alarm and display being respectively connected with the microprocessor, and the alarm is reminded for water leakage alarm, The display is for showing leaking area.

7. a kind of subregion positions method for detecting leakage, which is characterized in that the subregion leakage position finding and detection method includes following step It is rapid:

Detect the leakage situation of wiring area；

When detecting that there are the first leakage information for when leakage, acquiring first area for the wiring area, according to first leakage Liquid information judges whether the first area occurs leakage, if so, calculating the first leakage distance according to the first leakage information；

When detecting that there are the second leakage information for when leakage, acquiring second area for the wiring area, according to second leakage Liquid information judges whether the second area occurs leakage, if so, calculating the second leakage distance according to the second leakage information.

8. subregion according to claim 7 positions method for detecting leakage, which is characterized in that in " the leakage of detection wiring area It further include whether detect the wiring area route normal before liquid situation " step.

9. subregion according to claim 8 positions method for detecting leakage, which is characterized in that the step " detects the cloth Whether line region wire is normal " include:

Whether the length for detecting the line of induction is wrong.

10. subregion according to claim 8 positions method for detecting leakage, which is characterized in that the step " detects the cloth Whether line region wire is normal " further include:

Whether the route detected between the line of induction detection node is breaking.

Technical field

The present invention relates to leakage detection fields, position leakage detection system and method more particularly to a kind of subregion.

Background technique

With the continuous development of science and technology, the involvement big data of our life gradually.Big data analysis development is inevitable It is unable to do without the hardware facility on basis.The server for storing big data is run in Modern Electronic information system rooms, in order to protect The normal operation of the equipment such as server is demonstrate,proved, computer room can be equipped with the equipment such as precision air conditioner, air compressor machine, UPS and matched monitoring system It unites and provides stable power-supply system, good temperature and humidity environment and pressure environment to computer room.Air-conditioner humidifying water supply, compressor are all There can be the hidden danger of leakage.Not only equipment, the factors such as fire protection pipeline leakage, rain penetration are all broken for calculator room equipment The strike of bad property.In the environment of this high density electronic equipment, once leakage causes electronic system failures, it will and cause data to lose The serious consequences such as mistake, service disconnection.

Occur in order to avoid this kind of thing, leak detection controller is given birth in response to the market demand.Leak detection controller can Leakage situation is timely and effectively detected, alarm signal is issued at the first time and operation maintenance personnel is reminded to handle in time, risk is dropped to most It is low, guarantee the stabilization of facility environment.Nowadays big data era, computer room is extended so that more and more large data centers emerge in large numbers.No The leakage controller of positioning formula has been insufficient for testing requirements, at larger data center, occur leakage manually to check by A large amount of manpowers are wasted, and leakage point can not be found in time.Therefore demand gradually upgrades from delocalization leak detection in recent years To position formula leak detection.

Leakage register control has been used widely at present, is limited by cable structure and controller, at present Positioning formula leakage detector cannot achieve multipoint positioning leak detection.In controller end, the detection node that can be monitored is electric It is very limited for pressing information, therefore existing mode can only detect a leakage point.When the division of proprietor's use site is multiple Region when multiple regions occur and leaking, cannot be distinguished the specific distributed areas of leakage, can not also judge real leakage area The specific location in domain, influences positioning result.

According to product analysis on the market, existing multipoint positioning concept has only been beaten a time difference, has been gone out at the first time Current information is recorded when now alerting, other point leakage announcements occurs in prompt if the leakage signal detected changes greatly later It is alert, but second area can not be navigated to.This mode is other than it can not navigate to second area leakage point, if when first Between be as multipoint leakage it is common caused by alarm, then only can be considered as the alarm of point, and position inaccurate.

In consideration of it, overcoming the above defect in the prior art, the present invention provides a kind of subregions to position leakage detection system And method.

Summary of the invention

It is an object of the invention in view of the above drawbacks of the prior art, a kind of subregion positioning leakage detection system and side Method.

The purpose of the present invention can be realized by technical measures below:

To achieve the goals above, the present invention provides a kind of subregion positioning leakage detection system and method, the subregions Leakage position detecting system includes the first isometric line of induction and the second induction for being arranged in parallel in first area and second area Line is equipped with first diode in first line of induction, and the first area and the second area are by the first diode It separates, the second diode is connected between the second end of first line of induction and the second end of second line of induction, it is described First diode and second diode are oppositely arranged,

The first end of first line of induction, the output end of the first diode, second line of induction first end, The second end of output end and second line of induction that the first diode is corresponded in second line of induction is successively set as One detection node, the second detection node, third detection node, the 4th detection node and the 5th detection node,

First detection node, second detection node, the third detection node, the 4th detection node and Be respectively equipped at 5th detection node first voltage detection device, second voltage detection device, tertiary voltage detection device, 4th voltage check device and the 5th voltage check device,

The first voltage detection device, the second voltage detection device, the tertiary voltage detection device, described Four voltage check devices and the 5th voltage check device respectively with the first double control switch, the second double control switch, third dual control Switch, the 4th double control switch and the connection of the 5th double control switch,

First double control switch, second double control switch, the third double control switch, the 4th double control switch and 5th double control switch, the first contact be connected with the constant-current source, the second contact is connected with a reference source.

Further, first line of induction and second line of induction are the larger conducting wire with uniform resistance value of impedance.

Further, the subregion leakage position detecting system further include respectively with the first voltage detection device, institute State second voltage detection device, the tertiary voltage detection device, the 4th voltage check device and the 5th voltage inspection The connected subtracter of device is surveyed, the subtracter is used to acquire the pressure difference between the detection node.

Further, the subregion leakage position detecting system further includes the amplifier being connected with the subtracter, is used for Amplify the pressure difference.

Further, the subregion leakage position detecting system further includes that the microprocessor being connected with the amplifier is used for Judge whether leak according to the pressure difference, if so, calculating leak distance.

Further, the subregion positioning leakage detection system further includes the alarm being respectively connected with the microprocessor And display, the alarm are reminded for water leakage alarm, the display is for showing leaking area.

The present invention also provides a kind of subregion position method for detecting leakage, the subregion leakage position finding and detection method include with Lower step:

Detect the leakage situation of wiring area；

When detecting that there are the first leakage information for when leakage, acquiring first area for the wiring area, according to described One leakage information judges whether the first area occurs leakage, if so, calculating the first leakage according to the first leakage information Distance；

When detecting that there are the second leakage information for when leakage, acquiring second area for the wiring area, according to described Two leakage information judge whether the second area occurs leakage, if so, calculating the second leakage according to the second leakage information Distance.

It further, further include detecting the wiring area route before " the leakage situation of detection wiring area " step It is whether normal.

Further, the step " whether normal detecting the wiring area route " includes:

Whether the length for detecting the line of induction is wrong.

Further, the step " whether normal detecting the wiring area route " further include:

Whether the route detected between the line of induction detection node is breaking.

The beneficial effects of the invention are as follows a kind of subregion positioning leakage detection system and method is provided, which positions leakage Detection system is arranged first diode on first line of induction and carrys out subregion by two identical lines of induction disposed in parallel, and In the second reversed diode of two line of induction junction settings, in corresponding two lines of induction disposed in parallel of the two-end-point of subregion Upper setting detection node, each detection node pass through double control switch and are connected respectively with constant-current source and a reference source, regulation detection section The double control switch guiding of point, obtains the voltage of detection node.System and method of the invention can detecte overall routing region The no specific region (first area, second area or two regions occur) and leakage is specific that in the dead of night, leakage occurs Position (first area specific location, the equal specific location of second area specific location or two regions), the leakage in two regions Liquid detection is independent to be carried out, and is not interfere with each other, and is suitable for detecting apart from remote two region leakages, is especially able to detect two There is a situation where the specific location of leakage, strong applicabilities simultaneously in a region.

Detailed description of the invention

Fig. 1 is the subregion positioning leakage detection system structural schematic diagram of first embodiment of the invention.

Fig. 2 is that there are structures when leakage to show for leakage detection system first area for the subregion positioning of first embodiment of the invention It is intended to.

Fig. 3 be first embodiment of the invention subregion positioning leakage detection system second area there are structures when leakage to show It is intended to.

Specific embodiment

In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawing and specific implementation Invention is further described in detail for example.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, It is not intended to limit the present invention.

In order to keep the narration of this disclosure more detailed with it is complete, below for embodiments of the present invention and specific real It applies example and proposes illustrative description；But this not implements or uses the unique forms of the specific embodiment of the invention.Embodiment In cover multiple specific embodiments feature and to construction with operate these specific embodiments method and step it is suitable with it Sequence.However, can also reach identical or impartial function and sequence of steps using other specific embodiments.

The principle of the present invention is that two parallel lines of induction with uniform resistance value are arranged in wiring area, wherein incuding One diode D1 is set in line 1, and wherein the left side D1 is first area, is second area on the right of D1, leads between the line of induction 1,2 Diode D2 connection is crossed, diode D1 and diode D3 are oppositely arranged, and phase is arranged in the two-end-point of first area and second area The detection node of the line of induction is answered, detection node is connected to form whole system with a reference source and constant-current source respectively by double control switch. Whole system in the process of running can by double control switch be applied in combination and two contacts of each double control switch are cut Use is changed, the voltage of acquisition testing node is carried out, by the analysis to voltage, resistance and electric current, determines the leakage feelings of wiring area Condition, leakage generation area and specific leakage position.It is especially able to detect two regions while leakage occurs, and leak The specific location of liquid, the leakage detection in two regions is independent to be carried out, and is not interfere with each other, is suitable for apart from remote two regions Leakage detection, increases the application range and applicability of leakage detection system.

During practical application, need between remote two area routings, the two regions across The as entire wiring area of distance.Fig. 1 illustrates the subregion positioning leakage detection system structural representation of first embodiment of the invention Figure.As shown in Figure 1, subregion positioning leakage detection system includes the line of induction 1 and 2 of two parallel arrangements across first area and the Two regions, and by the way that two poles are arranged on the line of induction 1 (line of induction 2 can also be set to) between first area and second area Pipe D1 is provided with two reversed with diode D1 in the connecting wire between the endpoint a2 of the line of induction 1 and the endpoint b3 of the line of induction 2 Pole pipe D2.By the way that 5 detection nodes a1, a2, b1, b2 and b3 are arranged on the line of induction 1 and 2, wherein a1, b1 and b3 are induction The endpoint of line 1 and 2, a2 are set on the line of induction between first area and second area, are set to diode D1 electric current and are flowed out Behind direction, b2 is located on the position of the corresponding a2 of the line of induction 2, is respectively set in this 5 detection nodes of a1, a2, b1, b2 and b3 Voltage collecting device AIN1~5, the voltage of the acquisition testing node of voltage collecting device AIN1~5 a1, a2, b1, b2 and b3, voltage Acquisition device AIN1~5 are separately connected double control switch S1~5, and two contacts of S1~5 are connected with constant-current source 3 and a reference source respectively 4.Constant-current source 3 can provide constant electric current I for whole system_C, electric current I_CIt is flowed out from a reference source 4, forms complete circuit.

Fig. 2 is that there are structures when leakage to show for leakage detection system first area for the subregion positioning of first embodiment of the invention It is intended to.As shown in Fig. 2, when leakage occurs for first area, for example the N point in first area occurs for leakage point, is equivalent to first The n1 point of the line of induction 1 in region and the n2 point of the line of induction 2 are connected by resistance, and wherein n1, n2 correspond to leakage N point.

Fig. 3 be first embodiment of the invention subregion positioning leakage detection system second area there are structures when leakage to show It is intended to.As shown in figure 3, when leakage occurs for second area, for example the M point in second area occurs for leakage point, is equivalent to second The m1 point of the line of induction 1 in region and the m2 point of the line of induction 2 are connected by resistance, and wherein m1, m2 correspond to leakage m point.

In order to which whole system is explained further, detailed introduction is done to the application method of whole system below, the present invention mentions Supply a kind of subregion positioning method for detecting leakage, comprising the following steps:

In step sl, the leakage situation of wiring area is detected.

Specifically, referring to Fig. 1, in whole system in use, double control switch S1 should be connected with constant-current source 3, it is double Control switch S4 is connected with a reference source 4, disconnects double control switch S2, S3 and S5, electric current I_CIt is flowed into from S1, the acquisition of AIN1~5 corresponds to The voltage of detection node mainly detects the leakage situation of entire wiring area, circuit 1 by this circuit 1 of a1-a3-b3-b1 In include the line of induction 1 and 2 across wiring area.

When there is no leakage in wiring area, since direction phase is accessed in the direction of the diode D1 in the line of induction 1 and electric current Together, there are electric currents in detection node a1 and a2, then AIN1 and AIN2 can detect voltage, but diode D2 and current direction phase Instead, breaking at diode D2, electric current can not continue to flow to subsequent conditioning circuit, then detection node b1, b2 and b3 does not have an electric current, and AIN3~ 5 detect that voltage is 0；

When there are (deposit no matter leakage exists with first area or second area or two regions when leakage for wiring area In leakage), it is shorted by water droplet at the diode D2 open circuit in circuit 1, R1 and R2 (which is not described herein again) referring to figs. 2 and 3, At this point, there is current reflux at b1, then the voltage that AIN4 is detected is not 0.

It is connected by double control switch S1 with constant-current source 3, double control switch S4 is connected with a reference source 4, detects detection node Voltage at b1, when the collected voltage of AIN4 is 0, leakage is not present in wiring area；When the collected voltage of AIN4 is not 0, Leakage occurs for corresponding wiring area.

In step s 2, when detect wiring area there are the first leakage information for when leakage, acquiring first area, according to First leakage information judges whether first area occurs leakage, if so, calculating the first leakage distance according to the first leakage information.

Specifically, when detecting first area leakage situation, referring to Fig. 2, should be by double control switch S4 and 3 phase of constant-current source Connection, double control switch S1 are connected with a reference source 4, disconnect double control switch S2, S3 and S5, electric current I_CIt is flowed into from S4, AIN1~5 are adopted The voltage for collecting corresponding detection node, mainly detects the leakage feelings of entire wiring area by this circuit 2 of b1-b2-a2-a1 Condition only includes the line of induction 1 and 2 of first area in circuit 2.

When first area does not have leakage, the direction of diode D2 is identical with electric current access direction, but diode D1 and electricity Flow contrary, breaking at diode D1, electric current can not continue to flow to subsequent conditioning circuit, then detection node a1 does not have electric current, AIN1 Detect that voltage is 0；

When second area is there are when leakage, it is shorted at the diode D1 open circuit in circuit 2 by water droplet, R1 referring to fig. 2, this When, there is current reflux at a1, then the voltage that AIN1 is detected is not 0.

It is connected by double control switch S4 with constant-current source 3, double control switch S1 is connected with a reference source 4, detects detection node Voltage at a1, when the collected voltage of AIN1 is 0, leakage is not present in first area；When the collected voltage of AIN1 is not 0, Leakage occurs for first area.

The unit resistance of the line of induction 1 and 2 is set as Rate, constant current source current is set as I_C, 1,2 total length of the line of induction is set as L, first area distance are set as a1a2=b1b3=L0 (being suitable for whole system and method).

When detecting first area there are first area generation leakage point N when leakage, is determined, leakage distance is set as a1n1= B1n2=L1 please refers to Fig. 2.Obtaining the voltage that measures of AIN3, AIN4 and AIN5 in circuit 2 is respectively V3, V4 and V5, In, the voltage of V3 and V5 are equal to the voltage of n2 point, and V4 voltage is the voltage at b1, ignore liquid resistance R1, then the voltage of L1 For (V4- (V3+V5)/2), V5 is once represented with (V3+V5)/2 is average here, it is determined that first area leakage distance L1=(V4- (V3+V5)/2)/Ic/Rate。

In step s3, when detect wiring area there are the second leakage information for when leakage, acquiring second area, according to Second leakage information judges whether second area occurs leakage, if so, calculating the second leakage distance according to the second leakage information.

Specifically, when detecting second area leakage situation, referring to Fig. 3, should be by double control switch S2 and 3 phase of constant-current source Connection, double control switch S3 are connected with a reference source 4, disconnect double control switch S1, S4 and S5, electric current I_CIt is flowed into from S2, AIN1~5 are adopted The voltage for collecting corresponding detection node, mainly detects the leakage feelings of entire wiring area by this circuit 3 of a2-a3-b3-b2 Condition only includes the line of induction 1 and 2 of second area in circuit 3.

When second area does not have leakage, the direction of diode D2 and electric current access are contrary, breaking at diode D2, Electric current can not continue to flow to subsequent conditioning circuit, then detection node b2 does not have electric current, and AIN3 detects that voltage is 0；

When second area is there are when leakage, it is shorted at the diode D2 open circuit in circuit 3 by water droplet, referring to the R2 of Fig. 3, this When, there is current reflux at b2, then the voltage that AIN3 is detected is not 0.

It is connected by double control switch S2 with constant-current source 3, double control switch S3 is connected with a reference source 4, detects detection node Voltage at b2, when the collected voltage of AIN3 is 0, leakage is not present in first area；When the collected voltage of AIN3 is not 0, Leakage occurs for second area.

When detecting first area there are first area generation leakage point M when leakage, is determined, leakage distance is set as a1m1= B1m2=L2 please refers to Fig. 3.Obtaining the voltage that AIN2 and AIN3 in circuit 3 are measured is respectively V2 ' and V3 ', wherein ignore The voltage of liquid R2, then the voltage of a2m1+b2m2 is V2 '-V3 ', a2m1=b2m2=(V2 '-V3 ')/Ic/Rate, it is determined that Second area leakage distance L2=(V2 '-V3 ')/Ic/Rate+L0.

In order to guarantee entire detection method data accuracy, the also packet step S0 before step S1, in step S0 In, whether normal detect entire wiring area route.

Step S0 includes:

In step S001, whether the length for detecting the line of induction is wrong.

Specifically, S1, S2, S3 are disconnected, S4 is connected to a reference source, S5 is connected to constant-current source.Constant-current source release current is from b3 Detection node flows into.Because S1, S2, S3 are off-state, loop current will be flowed out from b1 detection node.Acquire the voltage of AIN4 V4 " similarly acquires the voltage V5 " of AIN5.Surveyed length of cable L '=(V5 "-V4 ")/Ic/Rate, L ' and L is compared, seeing is It is no equal.

By the detection to induction length of cable, the accuracy of the calculating of above-mentioned leakage position can be improved.

Step S0 further include:

In step S002, whether the route between detection line of induction detection detection node is breaking.

Specifically, S1, S2, S3 are disconnected, S4 is connected to a reference source, and S5 is connected to constant-current source.Constant current source current enters from b3, It is flowed out from b1.When the voltage V4 that Ain4 is detected is not 0, then the cable of b1b3 detection node connection (including detection node connects Conducting wire and the intermediate line of induction) normally, otherwise judge that the cable of b1b3 detection node connection exists and break.

S1, S2, S4 are disconnected, and S3 is connected to a reference source, and S5 is connected to constant-current source.Constant current source current enters from b3, flows from b2 Out.When the voltage V3 that Ain3 is detected is not 0, then the cable (explanation is same as above) of b2b3 detection node connection normally, otherwise judges There is broken string in the cable of b2b3 detection node connection.

S1, S3, S4 are disconnected, and S2 is connected to a reference source, and S5 is connected to constant-current source.Constant current source current enters from a3, flows from a2 Out.When the voltage V2 that Ain2 is detected is not 0, then the cable (explanation is same as above) of a2a3 detection node connection normally, otherwise judges There is broken string in the cable of a2a3 detection node connection.

S3, S4, S5 are disconnected, and S2 is connected to a reference source, and S1 is connected to constant-current source.Constant current source current enters from a1, flows from a2 Out.When the voltage V2 that Ain2 is detected is not 0, then the cable (explanation is same as above) of a1a2 detection node connection normally, otherwise judges There is broken string in the cable of a1a2 detection node connection.

It is detected by the broken string situation of the cable to each detection node of system and the extraction of each detection node, improves step The accuracy that leakage detects in S1.Also ensure the accurate of the leakage detection of whole system.

Above, AIN1~5 measures obtained node voltage and requires to carry out seeking difference operation.In hardware circuit, Ke Yishe It counts the subtracter being connected with AIN1~5 and obtains required pressure difference, amplifier is added behind subtracter and carries out signal amplification, amplification Pressure difference, to facilitate microprocessor that can measure to obtain.For example, before amplification, V0=V2-V1；After amplification, Vout=K*V0.

Present system is also judged and is calculated to the pressure difference acquired by the microprocessor being connected with amplifier, is judged Wiring area whether leak information, determine specific leaking area if leak occurs and calculates leak distance.If leak occurs, pass through The alarm being connected with microprocessor carries out water leakage alarm prompting, can also be leaked by the display display being connected with microprocessor The specific location of water, display show leak region (first area or second area according to the calculated result of microprocessor Or two equal leaks in region) and specific leaking area.

Liquid leakage to incude to be formed into a loop between cable, and the liquid of leakage is equally equal to resistance at this time to count It calculates.However the impedance variations actually in liquid are very big.The activity of mixing liquid intermediate ion, fluid temperature, liquid The data that mobility obtains us during acquisition are very discrete.Measure to obtain leak data need hardware with And set about in terms of software two.

Microprocessor acquires each point voltage and needs to switch switch, and is to acquire by the way of in turn respectively in many cases The data of a current potential, thus obtain data combination tend not to truly be synchronization data.Such as it first adopts Collect A point voltage Va, then acquires B point voltage Vb.The switching of this process needs the time, and A point voltage has been when measuring B point voltage Through being changed.Therefore it needs to acquire enough data, obtains enough data from the sample survey.Discrete-time signal passes through RC Filtering approaches original waveform as far as possible.

The precision of constant-current source will influence whether final calculated result, in conventional design, usually using temperature-sensitives such as NTC Resistance device carries out temperature-compensating to circuit.However even if the curve characteristic of thermistor may not be able to carry out one to circuit Compensation well, therefore the present invention will carry out one to the current values size that the current source under current environment provides before measuring A measurement acquisition, this has benefited from circuit using microprocessor.It is calculated using the current value of real-time measurement, to solve Because the factors brings such as environment temperature, humidity, component technology difference influence.

The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.