WO2013063904A1 - 线路故障分段检测装置及检测方法 - Google Patents

线路故障分段检测装置及检测方法 Download PDF

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Publication number
WO2013063904A1
WO2013063904A1 PCT/CN2012/074312 CN2012074312W WO2013063904A1 WO 2013063904 A1 WO2013063904 A1 WO 2013063904A1 CN 2012074312 W CN2012074312 W CN 2012074312W WO 2013063904 A1 WO2013063904 A1 WO 2013063904A1
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line
detecting
detection
tested
segment
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PCT/CN2012/074312
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English (en)
French (fr)
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周翔
陈安涛
杨希宁
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湖南三一智能控制设备有限公司
三一重工股份有限公司
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Publication of WO2013063904A1 publication Critical patent/WO2013063904A1/zh

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/08Locating faults in cables, transmission lines, or networks
    • G01R31/081Locating faults in cables, transmission lines, or networks according to type of conductors
    • G01R31/085Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead

Definitions

  • Line fault segmentation detecting device and detecting method The present application claims priority to Chinese patent application filed on October 31, 2011 by the Chinese Patent Office, application number 201110338148.2, and the invention name is "line fault segmentation detecting device and detecting method" The entire contents of which are incorporated herein by reference.
  • the invention relates to segmentation detection of line faults, in particular to a line fault segmentation detection device and a detection method.
  • the carrier In actual production, the carrier is connected to the target device according to its specific needs and wiring harness characteristics. It may be a whole line. When the line is long, it may be divided into multiple lines through the connector. Once the line or connector has an open circuit failure. The fault phenomenon of the single tube alone cannot accurately determine the location of the line fault, and sometimes even lead to judgment errors, causing unnecessary troubles, wasting time, manpower and material resources, and seriously reducing work efficiency.
  • the existing detection circuit is more complicated, and the detection circuit itself may also malfunction, so that the entire line introduces a new fault point that may be faulty.
  • the existing detection circuit is used to segment the detection line, and the operation is not strong, and the cost is high.
  • the object of the present invention is to provide a line fault segmentation detecting device, which has a structural unit, high fault detection efficiency and low cost.
  • Another object of the present invention is to provide a line fault segmentation detection method, which is convenient to implement. Highly operability, troubleshooting, and high efficiency.
  • the present invention provides a line fault segmentation detecting device, wherein a plurality of nodes are sequentially arranged between a line start point and a line end point of a line to be tested, and the line to be tested is divided into a plurality of detection segments, which are close to each other.
  • the node and the detection segment of the starting point of the line are a first node and a first detection segment, and the remaining nodes and the detection segment are sequentially arranged.
  • the line fault segmentation detection system includes: a plurality of detection resistors, the number of which is on the line to be tested The number of the nodes is the same, wherein the two ends of the first detecting resistor are respectively connected to the starting point of the line and the first node, so that the first detecting resistor is connected in parallel with the line to be tested of the first detecting segment;
  • the second detecting resistor is connected to the circuit to be tested of the first detecting segment and the second detecting segment in parallel, and the two ends of the third detecting resistor are respectively connected to the starting point of the line and a third node, the third detecting resistor is connected in parallel with the line to be tested of the first detecting segment, the second detecting segment and the third detecting segment, and so on, and the last check
  • the two ends of the resistor are respectively connected to the starting point of the line and a node adjacent to the end point of the line;
  • the control device has one end connected to the end point of the line and the other end being grounded, and the control
  • the above-mentioned line fault segmentation detection system wherein the circuit to be tested is sequentially provided with three nodes, a first node, a second node and a third node, and the two ends of the first detecting resistor are respectively connected to the starting point of the line and the first a node, the two ends of the second detecting resistor are respectively connected to the starting point of the line and the second node, and the two ends of the third detecting resistor are respectively connected to the starting point of the line and the third node.
  • the circuit to be tested is divided into four detection segments by the three nodes, and the circuit to be tested of the first detection segment includes a toggle switch.
  • control device is a programmable controller.
  • control device is a three-one motion controller.
  • the present invention provides a line fault segmentation detection method, including: sequentially providing a plurality of nodes between a line start point and a line end point of a line to be tested, and dividing the line to be tested into a plurality of detection segments, a node and a detection segment near the starting point of the line are a first node and a first detection segment, and the remaining nodes and the detection segment are sequentially arranged; a plurality of detection resistors are disposed, and the detection resistor is The number of the nodes is the same as the number of the nodes on the line to be tested, and the two ends of the first detecting resistor are respectively connected to the starting point of the line and the first node, so that the first detecting resistor and the line to be tested of the first detecting section are Parallel; connecting two ends of the second detecting resistor to the starting point of the line and the second node respectively,
  • the method for detecting a line fault segmentation method is characterized in that: calculating a plurality of the standard values includes: setting an open circuit fault in the first detecting segment, and calculating the calculated end point voltage of the line as a first standard value;
  • the second detection segment has an open circuit fault, and the calculated line end voltage is defined as a second standard value;
  • the third detection segment has an open circuit fault, and the calculated line end voltage is defined as a third standard value; and so on.
  • the fault is detected in the last detection segment, and the calculated terminal end voltage is the final standard value, and the final standard value is equal to 0; the first standard value is the largest, and the remaining standard values are sequentially decreased.
  • the first standard value is less than the line starting point voltage.
  • the above-mentioned line fault segmentation detecting method wherein, when the measured actual voltage of the line end point is greater than the first standard value is less than the line starting point voltage, determining that the line to be tested in the first detecting section has an open circuit fault And determining that the line end actual voltage is greater than the second standard value is less than the first standard value, determining that the line to be tested in the second detection segment has an open circuit fault; and the line end actual voltage is greater than the third standard If the value is less than the second standard value, it is determined that there is an open circuit fault in the line to be tested in the third detecting segment; and so on, if the actual voltage of the line end point is between the last two standard values, the last detecting segment is determined. There is an open circuit fault in the line to be tested.
  • control device has a threshold voltage, and controls parallel resistance values of all the detecting resistors, so that the line end point voltage is smaller than the gate ⁇ voltage.
  • the structure of the line fault segmentation detecting device of the invention is adapted to the requirements of the current actual line wiring and carrier characteristics, has low cost and high efficiency, and solves the technical problem of fault detection of a long length line.
  • the line fault segmentation detection method of the invention is convenient and quick to implement, and the fault detection excludes the single unit, and the operation is strong and the efficiency is high.
  • the line fault segmentation detecting device and the detecting method of the invention have wide application range, the fault display is intuitive, and has strong promotion value.
  • FIG. 1 is a schematic diagram of a line fault segmentation detection system of the present invention disposed on a line to be detected;
  • FIG. 2 is a schematic circuit diagram of a line fault segmentation detection system according to the present invention;
  • FIG. 3 is a flowchart of a line fault segmentation detection method according to the present invention.
  • FIG. 4 is a schematic diagram of the collected values of the controller for the line fault segmentation detection method of the present invention.
  • FIG. 1 is a schematic diagram of a line fault segmentation detecting device disposed on a circuit to be detected
  • FIG. 2 is a circuit schematic diagram of a line fault segmentation detecting system according to the present invention.
  • the line end point P a plurality of nodes L1 to Ln are sequentially disposed between the line start point S and the line end point P, thereby dividing the line to be tested 10 into a plurality of detection sections (total n+1 sections), wherein, near the starting point of the line
  • the node of S is the first node, and the remaining nodes are arranged in sequence.
  • the detection segment near the start point S of the line is the first detection segment, and the remaining detection segments are sequentially arranged.
  • 1 and 2 show a preferred embodiment with three nodes on the line for illustrative purposes only.
  • the line fault segmentation detecting device of the present invention mainly comprises: a plurality of detecting resistors, the number of detecting resistors being the same as the number of nodes on the circuit to be tested 10, wherein the two ends of the first detecting resistor 11 are respectively connected to the starting point S of the line and the first a node L1, the first detecting resistor 11 is connected in parallel with the line to be tested of the first detecting section; the two ends of the second detecting resistor 12 are respectively connected to the line starting point S and the second node L2, so that the second detecting resistor 12 and the first detecting The segments of the second detecting section are connected in parallel with each other.
  • the two ends of the third detecting resistor 13 are respectively connected to the starting point S of the line and the third node L3, so that the third detecting resistor 13 and the first detecting section and the second detecting section are respectively connected.
  • the last detection resistor ie, the nth detection resistor
  • the nth detecting resistor is connected in parallel to the line to be tested of the first to nth detecting sections;
  • the control device 2 is connected to the line end point P and the other end is grounded, and the control device 2 is configured to collect the voltage of the line end point P , And the acquisition value and the standard value are compared to detect the location of the fault line; an output device 3, connected to 2, the detection result of the control apparatus 2 for outputting a control device.
  • the pumping line is taken as an example.
  • the entire pumping line is a three-segment line, and two connectors 20 are connected in the middle to connect the entire line.
  • the entire line to be tested is provided.
  • a button switch 30 may be included in the segment.
  • the detecting resistor is also provided with three: a first detecting resistor 11, a second detecting resistor 12 and a third detecting resistor 13, and the three detecting resistors are sequentially connected in parallel to each other in the above manner.
  • the detecting resistors can be respectively disposed in the connector, thereby directly integrating part of the detecting system into the circuit to be tested, so that the detecting operation is stronger, the structure is more clean, and the working efficiency is improved.
  • the integration of package sense resistors in the connector is well known to those skilled in the art in light of the principles of the present invention and will not be described in detail.
  • the control device 2 is connected to the line end point P, and the other end is grounded.
  • the control device 2 collects the voltage value of the line end point P. Since a plurality of detecting resistors are connected in parallel on the line to be tested 10, the circuit of a detecting section of the line to be tested 10 When an open circuit fault occurs, according to the circuit principle, the voltage value of the line end point P will change, and the detection section where the open circuit fault is located is different, and the voltage value of the line end point P is also different. It is pre-calculated that in the ideal case, the open circuit fault is located in each detection.
  • the voltage value of the line end point P corresponding to the segment, that is, the standard value, and then comparing the voltage value of the P point actually collected by the control device 2 with the standard value, can determine the detection segment where the open circuit fault is located, in the process
  • the function of the control device 2 is to collect the voltage value of the line end point P, compare the collected voltage value with the standard value, obtain a comparison result, and determine the detection segment where the fault is located.
  • the control device 2 can adopt a conventional programmable controller (PLC).
  • PLC programmable controller
  • SYMC Sudapore Motion Controller
  • the output device 3 is connected to the control device 2 for outputting the detection result of the control device 2, and the output device 3 can select a common display device or the like to display the voltage value of the P point in an intuitive manner or directly display the detection segment where the fault is located.
  • the application of the output device 3 is a conventional technique in the art, and the technician can select and set the output device 3 according to the attributes of the control device 2. The technical solutions are various and will not be described again.
  • FIG. 3 is a flowchart of a line fault segmentation detection method according to the present invention
  • FIG. 4 is a schematic diagram of a comparison of collected values of a line fault segmentation detection method controller according to the present invention, and is combined with FIG. 1 and FIG. 2 .
  • the above-mentioned pumping line is taken as an example, and the entire line to be tested is provided with three nodes, which are divided into four detecting segments.
  • the line fault segmentation detecting method of the present invention mainly includes the following steps:
  • the segmentation detection system of the present invention is connected to the line to be tested 10, including: three nodes are arranged on the line to be tested, and the line to be tested is divided into four detection segments;
  • the detecting resistors are connected in parallel with the corresponding detecting segments, that is, the two ends of the first detecting resistor 11 are respectively connected to the starting point S of the line and the first node L1, so that the first detecting resistor 11 and the first detecting segment are to be tested.
  • the two parallel detecting resistors 12 are respectively connected to the starting point S of the line and the second node L2, so that the second detecting resistor 12 is connected in parallel with the line to be tested of the first detecting section and the second detecting section; similarly, the third The two ends of the detecting resistor 13 are respectively connected to the starting point S of the line and the third node L3, so that the third detecting resistor 13 is connected in parallel with the line to be tested of the first detecting section, the second detecting section and the third detecting section; Connected to the line end point P, the other end is grounded; the output device 3 is connected to the control device 2.
  • the standard values are calculated according to the respective detection resistors, the control device 2, and the relevant parameters of the line to be tested 10, that is, in the ideal case, the circuit corresponding to the disconnection fault is located in each detection segment.
  • the voltage value of the end point P Set the starting point S voltage of the line to Vcc, the resistance values of the first, second and third detecting resistors are Rl, R2 and R3 respectively, and the internal resistance of the control device 2 is Rin. To realize line detection, the above values should be Value.
  • This voltage value can be defined as the fourth standard value. It is easy to see that the location of the open circuit fault is different, the voltage standard value of the P point is different, and there are 0 ⁇ Up3 ⁇ Up2 ⁇ Upl, and each standard value should have a gradual change rule.
  • the first detection section may include a toggle switch 30, and when the toggle switch 30 is opened, it is equivalent to the circuit of the first detection section being disconnected, and the voltage value of the defect point should be the above.
  • the first standard value the number of switches and the setting position are not limited.
  • the voltage values of various situations can be calculated according to the circuit principle, which will be obvious to those skilled in the art, and therefore will not be described again.
  • the line to be tested 10 itself also has a certain resistance value, the actual collected point voltage value cannot be completely equal to the above standard values.
  • the resulting fault location detection result is transmitted to the output device 3 for output, and the output device 3 can be a display device that directly displays the result of the detection.
  • the segmentation detection of the line is completed, and the device is quickly determined to determine the location of the disconnection fault, and the work efficiency is high.
  • the programmable controller PLC selected by the control device 2 will have a threshold voltage Um, which must be operated under the condition of less than the threshold voltage, that is, the voltage value of the P point should be Less than the threshold voltage Um.
  • the threshold voltage Um which must be operated under the condition of less than the threshold voltage, that is, the voltage value of the P point should be Less than the threshold voltage Um.

Abstract

一种线路故障分段检测装置及检测方法,其中线路故障分段检测装置包括:多个检测电阻(11,12,13),分别并联于各自对应的检测段的待测线路(10);控制设备(2),其一端连接于待测线路(10)的线路终点(P),另一端接地,所述控制设备(2)用于采集线路终点(P)的电压值,并将采集值和标准值进行比较,以检测出线路故障所在位置;输出设备(3),连接于控制设备(2),用于输出控制设备(2)的检测结果,该线路故障分段检测装置及检测方法结构简单,操作性强,检测结果可靠,工作效率高。

Description

线路故障分段检测装置及检测方法 本申请要求于 2011 年 10 月 31 日提交中国专利局、 申请号为 201110338148.2、发明名称为"线路故障分段检测装置及检测方法 "的中国专 利申请的优先权, 其全部内容通过引用结合在本申请中。
技术领域
本发明涉及线路故障的分段检测, 特别涉及一种线路故障分段检测装 置及检测方法。
背景技术
机械设备内部的线路往往比较复杂,且长度较长,一旦线路发生故障, 对线路进行检测以确定故障点所在将是十分繁瑣和困难的工作。
实际生产中, 载体根据其具体需要及线束布线特点, 线路连接到目标 设备, 可能是一整段线路, 线路较长时也可能通过接插件分为多段线路, 一旦线路或者接插件发生了断路故障, 单凭筒单的故障现象, 并不能准确 判定线路故障所在位置, 有时甚至导致判断错误, 造成不必要的麻烦, 浪 费时间、 人力、 物力, 严重降低工作效率。
为了能够提高线路检测速度, 有相应的检测电路被开发出来, 但使用 现有的检测电路进行检测存在以下缺陷:
1、 现有的检测电路比较复杂, 检测电路本身也可能出现故障, 使整个 线路引入了新的可能出现故障的故障点。
2、 实际应用中采用现有的检测电路来分段检测线路操作性不强,且成 本较高。
3、 多段线路故障原因查找目的性不强, 没有分类故障代码显示, 不利 于快速解决问题, 工作效率低下。
鉴于上述情况, 本设计人借其多年相关领域的技术经验以及丰富的专 业知识, 不断研发改进, 并经大量的实践验证, 提出了本发明的线路故障 分段检测装置及检测方法的技术方案。
发明内容
本发明的目的在于提供一种线路故障分段检测装置, 结构筒单, 故障 检测效率高, 成本低。
本发明的另一目的在于提供一种线路故障分段检测方法, 实施方便, 操作性强, 故障排除筒单, 效率高。
为了实现上述目的,本发明提供了一种线路故障分段检测装置, 其中, 待测线路的线路起点和线路终点之间依次设有多个节点, 将待测线路划分 为多个检测段, 靠近所述线路起点的节点和检测段为第一节点和第一检测 段, 其余节点和检测段依次排列, 所述线路故障分段检测系统包括: 多个 检测电阻, 其个数与待测线路上的所述节点个数相同, 其中第一检测电阻 两端分别连接于所述线路起点和第一节点, 使所述第一检测电阻与第一检 测段的待测线路并联; 第二检测电阻两端分别连接于所述线路起点和第二 节点, 使所述第二检测电阻与第一检测段和第二检测段的待测线路并联; 第三检测电阻两端分别连接于所述线路起点和第三节点, 使所述第三检测 电阻与第一检测段、第二检测段和第三检测段的待测线路并联, 以此类推, 最后一个检测电阻两端分别连接于所述线路起点和与所述线路终点相邻的 节点; 控制设备, 其一端连接于所述线路终点, 另一端接地, 所述控制设 备用于采集所述线路终点的电压值, 并将采集值和标准值进行比较, 以检 测出线路故障所在位置; 输出设备, 连接于所述控制设备, 所述输出设备 用于输出所述控制设备的检测结果。
上述的线路故障分段检测系统,其中,待测线路上依次设有三个节点, 第一节点、 第二节点和第三节点, 所述第一检测电阻两端分别连接于所述 线路起点和第一节点, 所述第二检测电阻两端分别连接于所述线路起点和 第二节点, 所述第三检测电阻两端分别连接于所述线路起点和第三节点。
上述的线路故障分段检测系统, 其中, 所述待测线路由所述三个节点 划分为四个检测段, 所述第一检测段的待测线路上包括一钮子开关。
上述的线路故障分段检测系统,其中,所述控制设备为可编程控制器。 上述的线路故障分段检测系统, 其中, 所述控制设备为三一运动控制 器。
上述的线路故障分段检测系统, 其中, 所述输出设备为显示设备。 为了实现上述目的,本发明提供了一种线路故障分段检测方法, 包括: 在待测线路的线路起点和线路终点之间依次设有多个节点, 将待测线路划 分为多个检测段, 靠近所述线路起点的节点和检测段为第一节点和第一检 测段, 其余节点和检测段依次排列; 设置多个检测电阻, 所述检测电阻的 个数与待测线路上的所述节点个数相同, 将第一检测电阻两端分别连接于 所述线路起点和第一节点, 使所述第一检测电阻与第一检测段的待测线路 并联; 将第二检测电阻两端分别连接于所述线路起点和第二节点, 使所述 第二检测电阻与第一检测段和第二检测段的待测线路并联; 将第三检测电 阻两端分别连接于所述线路起点和第三节点, 使所述第三检测电阻与第一 检测段、 第二检测段和第三检测段的待测线路并联, 以此类推, 将最后一 个检测电阻两端分别连接于所述线路起点和与所述线路终点相邻的节点; 将控制设备一端连接于所述线路终点, 另一端接地; 将输出设备与所述控 制设备相连接以输出其检测结果; 根据各所述检测电阻、 控制设备以及待 测线路的参数来计算所述线路终点电压的多个标准值; 利用所述控制设备 对所述线路终点进行实际电压采集, 并将实际测得的线路终点电压值与多 个所述标准值相比较, 进而推出断路故障所在的位置, 得出检测结果; 将 得出的故障位置检测结果传送到所述输出设备进行输出。
上述的线路故障分段检测方法, 其特征在于, 计算多个所述标准值包 括: 设所述第一检测段存在断路故障, 计算所得所述线路终点电压定义为 第一标准值; 设所述第二检测段存在断路故障, 计算所得所述线路终点电 压定义为第二标准值; 设所述第三检测段存在断路故障, 计算所得所述线 路终点电压定义为第三标准值; 以此类推,设最后一检测段存在断路故障, 计算所得所述线路终点电压为最后标准值, 所述最后标准值等于 0; 所述 第一标准值最大, 其余各所述标准值依次减小, 所述第一标准值小于所述 线路起点电压。
上述的线路故障分段检测方法, 其中, 所测得的所述线路终点实际电 压大于所述第一标准值小于所述线路起点电压, 则判定所述第一检测段的 待测线路存在断路故障; 所述线路终点实际电压大于所述第二标准值小于 所述第一标准值, 则判定所述第二检测段的待测线路存在断路故障; 所述 线路终点实际电压大于所述第三标准值小于所述第二标准值, 则判定所述 第三检测段的待测线路存在断路故障; 以此类推, 所述线路终点实际电压 介于最后两标准值之间,则判定最后一段检测段的待测线路存在断路故障。
上述的线路故障分段检测方法, 其中, 所述控制设备具有门槛电压, 控制所有所述检测电阻的并联电阻值, 以使所述线路终点电压小于所述门 槛电压。
由上述可知, 本发明的线路故障分段检测装置及检测方法具有下列优 点及特点:
1、本发明的线路故障分段检测装置结构筒单,适应目前实际线路布线 以及载体特点的需求, 成本低, 效率高, 解决了长度较长线路的故障检测 的技术难题。
2、本发明的线路故障分段检测方法实施方便快捷,故障检测排除筒单, 操作性强, 效率高。
3、本发明的线路故障分段检测装置及检测方法适用范围广,故障显示 直观, 具有较强的推广价值。
附图说明
以下附图仅旨在于对本发明做示意性说明和解释, 并不限定本发明的 范围
图 1为本发明线路故障分段检测系统设置于待检测线路示意图; 图 2为本发明线路故障分段检测系统电路原理图;
图 3为本发明线路故障分段检测方法流程图;
图 4为本发明线路故障分段检测方法控制器采集值对照示意图。
主要元件标号说明:
10 待测线路
20 接插件
30 钮子开关
11 第一检测电阻
12 第二检测电阻
13 第三检测电阻
2 采集控制设备
3 输出设备
41 第一检测段
42 第二检测段
43 第三检测段
44 第四检测段 s 线路起点
P 线路终点
Ll、 L2、 L3 节点
具体实施方式
为了对本发明的技术特征、 目的和效果有更加清楚的理解, 现对照附 的实质范围。
请参考图 1及图 2, 其中图 1为本发明线路故障分段检测装置设置于 待检测线路示意图, 图 2为本发明线路故障分段检测系统电路原理图, 待 测线路 10包括线路起点 S和线路终点 P,在线路起点 S和线路终点 P之间 依次设有多个节点 L1至 Ln, 从而将待测线路 10划分为多个检测段 (总共 n+1段), 其中, 靠近线路起点 S的节点为第一节点, 其余节点依次排列, 靠近线路起点 S的检测段为第一检测段, 其余检测段依次排列。 图 1和图 2所示为一优选实施例, 其线路上设有三个节点, 仅为示意性说明。
本发明线路故障分段检测装置主要包括: 多个检测电阻, 检测电阻的 个数与待测线路 10上的节点个数相同, 其中, 第一检测电阻 11两端分别 连接于线路起点 S和第一节点 L1 , 使第一检测电阻 11与第一检测段的待 测线路并联;第二检测电阻 12两端分别连接于线路起点 S和第二节点 L2, 使第二检测电阻 12与第一检测段和第二检测段的待测线路并联; 同理, 第 三检测电阻 13两端分别连接于线路起点 S和第三节点 L3, 使第三检测电 阻 13与第一检测段、第二检测段和第三检测段的待测线路并联,以此类推, 最后一个检测电阻 (即第 n检测电阻)两端将分别连接于线路起点 S和与线 路终点 P相邻的节点(即第 n节点 Ln),使第 n检测电阻并联于第一至第 n检 测段的待测线路; 控制设备 2, —端连接于线路终点 P, 另一端接地, 控制 设备 2用于采集线路终点 P的电压值, 并将采集值和标准值进行比较, 以 检测出线路故障所在位置; 输出设备 3, 连接于控制设备 2, 用于输出控制 设备 2的检测结果。
本实施例中以泵车线路为例, 整条泵车线路为三段线路, 中间设有两 个接插件 20将整条线路连接起来, 如图 1所示, 整条待测线路 10上设有 三个节点: 第一节点 Ll、 第二节点 L2和第三节点 L3, 将整条待测线路 10划分为四个检测段,靠近线路起点 S的为第一检测段 41 ,然后第二检测 段 42、 第三检测段 43、 第四检测段 44依次排列, 其中靠近线路起点 S的 第一检测段上可包括一钮子开关 30, 相应的, 检测电阻也设有三个: 第一 检测电阻 11、 第二检测电阻 12和第三检测电阻 13 , 三个检测电阻如上述 方式依次并联于各自对应的待测线路的检测段,其中第一检测电阻 11相当 于与钮子开关 30并联。
进一步优选的, 检测电阻可分别内设于接插件之中, 从而直接将部分 的检测系统整合到待测线路中, 使检测的操作性更强, 结构更加筒洁, 有 利于提高工作效率, 在接插件中整合封装检测电阻是本领域技术人员能够 根据本发明原理推知的, 故不再详细说明。
控制设备 2—端连接于线路终点 P, 另一端接地, 控制设备 2采集线 路终点 P的电压值, 由于待测线路 10上并联了多个检测电阻, 当待测线路 10某一检测段的电路发生断路故障时, 根据电路原理, 线路终点 P的电压 值会发生变化, 且断路故障所在的检测段不同, 线路终点 P的电压值也不 同, 预先计算出在理想情况下, 断路故障位于各检测段时所对应的线路终 点 P的电压值, 也就是标准值, 然后将控制设备 2实际采集到的 P点电压 值与标准值进行比较, 即可判断出断路故障所在的检测段, 在此过程中, 控制设备 2的作用为采集线路终点 P的电压值、 将采集到的电压值与标准 值比较、 得出比较结果并判定故障所在检测段。 控制设备 2可采用常规的 可编程控制器 (PLC) , 例如可使用三一集团的产品 "三一运动控制器 (SYMC)", 关于具体的如何比较电压值以判定断路故障所在位置, 在下文 介绍本发明分段检测方法时将会详细说明。
输出设备 3连接于控制设备 2, 用于输出控制设备 2的检测结果, 输 出设备 3可选用常见的显示设备等, 以直观的方式显示出 P点电压值或者 直接显示出故障所在的检测段, 关于输出设备 3的应用已为本领域的常规 技术,技术人员可根据控制设备 2的属性而相应的选择和设置输出设备 3 , 技术方案多种多样, 在此不再——赘述。
下面请参考图 3及图 4, 其中图 3为本发明线路故障分段检测方法流 程图, 图 4为本发明线路故障分段检测方法控制器采集值对照示意图, 并 结合图 1及图 2来说明本发明的线路故障分段检测方法, 如图所示, 仍以 上述的泵车线路为例, 整条待测线路设有三个节点, 划分为四个检测段, 本发明的线路故障分段检测方法主要包括如下步骤:
首先, 将本发明的分段检测系统连接到待测线路 10中, 包括: 在待测 线路 10上设三个节点,将待测线路划分为四个检测段;依照上面所述的方 式将多个检测电阻与其对应的各检测段相并联, 也就是说, 将第一检测电 阻 11两端分别连接于线路起点 S和第一节点 L1 ,使第一检测电阻 11与第 一检测段的待测线路并联;将第二检测电阻 12两端分别连接于线路起点 S 和第二节点 L2, 使第二检测电阻 12与第一检测段和第二检测段的待测线 路并联; 同理, 第三检测电阻 13两端分别连接于线路起点 S和第三节点 L3, 使第三检测电阻 13 与第一检测段、 第二检测段和第三检测段的待测 线路并联; 将控制设备 2—端连接于线路终点 P, 另一端接地; 将输出设 备 3与控制设备 2相连接。
连接好检测系统和待测线路后, 根据各检测电阻、 控制设备 2以及待 测线路 10的相关参数来计算各标准值,也就是在理想情况下, 断路故障位 于各检测段时所对应的线路终点 P的电压值。 设线路起点 S电压为 Vcc, 第一、 第二、 第三检测电阻的阻值分别为 Rl、 R2、 R3, 控制设备 2的内 阻为 Rin, 若要实现线路检测, 上述各值均应为定值。
那么当第一检测段 41 存在断路故障时, 根据电路原理, 线路终点 P 的电压值 Up为:
Uu RIIIR2 ^IIR——+Rin V v cc
定义该电压值为第一标准值 Upl ;
当第二检测段 42存在断路故障时: 线路终点 P的电压值 Up为: Un -—— R2 II―R——+Rin V v cc,
定义该电压值为第二标准值 Up2;
当第三检测段 43存在断路故障时: 线路终点 P的电压值 Up为: JJn - R3 R+iRnin Vcccc '
定义该电压值为第三标准值 Up3;
当第四检测段 44存在断路故障时: 线路终点 P的电压值 Up为: Up = ,
该电压值可定义为第四标准值。 很容易看出, 断路故障存在的位置不同, P 点的电压标准值不同, 并 且有 0< Up3< Up2< Upl , 各标准值应存在渐变规律。
上文中提到, 第一检测段可包括一钮子开关 30, 那么当钮子开关 30 打开时, 就相当于第一检测段的待测线路断路, 这时 Ρ点的电压值应为上 述的第一标准值。 当然, 开关的设置数量和设置位置并不作限定, 根据电 路原理均可推算各种情况相应的电压值, 这对本领域技术人员来说是显而 易见的, 故不再赘述。
然后,可以通电,利用控制设备 2对线路终点 Ρ进行实际的电压采集, 并将实际测得的 Ρ点电压值与上述的各标准值相比较, 进而推得断路故障 所在的位置, 即得出检测结果。 由于待测线路 10本身也具有一定的阻值, 所以实际采集得到的 Ρ点电压值并不能完全等于上述的各标准值。
经推算可知, 当 Ρ点实际电压值大于 0小于第三标准值 Up3时, 为第 四检测段 44存在断路故障; 当 P点实际电压值大于第三标准值 Up3小于 第二标准值 Up2时, 为第三检测段 43存在断路故障; 当 P点实际电压值 大于第二标准值 Up2小于第一标准值 Upl时, 为第二检测段 42存在断路 故障; 当 P点实际电压值大于第一标准值 Upl小于 Vcc时, 为第一检测段 41存在断路故障。
最后, 经比较, 将最后得出的故障位置检测结果传送到输出设备 3进 行输出, 输出设备 3可为显示设备, 其直接显示检测的结果。
经过上述各步骤, 完成线路的分段检测, 筒单快捷的确定断路故障所 在位置, 工作效率高。
上述仅以三节点的待测线路为例进行说明, 但本领域的技术人员应可 根据上述实施例轻易推得更多节点的待测线路的检测方法,在此不再赘述。
值得提出的是, 一般来说, 控制设备 2所选用的可编程控制器 PLC都 会具有一门槛电压 Um, 必须在小于门槛电压的条件下, 其才能正常工作, 也就是说 P点的电压值应小于门槛电压 Um。请结合图 2,设线路中整个并 联部分的电阻为 R, 那么 P点的电压应为:
Up二 U R+Rin cc 那么也就是说:
Figure imgf000010_0001
进一步推算得出:
R > Rin Vcc -UmRin
Um 也就是说, 应保证所有检测电阻的并联电阻值 R满足上述条件。 以上所述仅为本发明示意性的具体实施方式, 并非用以限定本发明的 范围。 任何本领域的技术人员, 在不脱离本发明的构思和原则的前提下所 作出的等同变化与修改, 均应属于本发明保护的范围。

Claims

权 利 要 求
1、一种线路故障分段检测系统, 其特征在于, 待测线路的线路起点和 线路终点之间依次设有多个节点, 将待测线路划分为多个检测段, 靠近所 述线路起点的节点和检测段为第一节点和第一检测段, 其余节点和检测段 依次排列, 所述线路故障分段检测系统包括:
多个检测电阻, 其个数与待测线路上的所述节点个数相同, 其中第一 检测电阻两端分别连接于所述线路起点和第一节点, 使所述第一检测电阻 与第一检测段的待测线路并联; 第二检测电阻两端分别连接于所述线路起 点和第二节点, 使所述第二检测电阻与第一检测段和第二检测段的待测线 路并联; 第三检测电阻两端分别连接于所述线路起点和第三节点, 使所述 第三检测电阻与第一检测段、 第二检测段和第三检测段的待测线路并联, 以此类推, 最后一个检测电阻两端分别连接于所述线路起点和与所述线路 终点相邻的节点;
控制设备, 其一端连接于所述线路终点, 另一端接地, 所述控制设备 用于采集所述线路终点的电压值, 并将采集值和标准值进行比较, 以检测 出线路故障所在位置;
输出设备, 连接于所述控制设备, 所述输出设备用于输出所述控制设 备的检测结果。
2、根据权利要求 1所述的线路故障分段检测系统, 其特征在于, 待测 线路上依次设有三个节点, 第一节点、 第二节点和第三节点, 所述第一检 测电阻两端分别连接于所述线路起点和第一节点, 所述第二检测电阻两端 分别连接于所述线路起点和第二节点, 所述第三检测电阻两端分别连接于 所述线路起点和第三节点。
3、根据权利要求 2所述的线路故障分段检测系统, 其特征在于, 所述 待测线路由所述三个节点划分为四个检测段, 所述第一检测段的待测线路 上包括一钮子开关。
4、根据权利要求 1所述的线路故障分段检测系统, 其特征在于, 所述 控制设备为可编程控制器。
5、根据权利要求 4所述的线路故障分段检测系统, 其特征在于, 所述 控制设备为三一运动控制器。
6、根据权利要求 1所述的线路故障分段检测系统, 其特征在于, 所述 输出设备为显示设备。
7、一种线路故障分段检测方法, 其特征在于, 所述线路故障分段检测 方法包括:
在待测线路的线路起点和线路终点之间依次设有多个节点, 将待测线 路划分为多个检测段, 靠近所述线路起点的节点和检测段为第一节点和第 一检测段, 其余节点和检测段依次排列;
设置多个检测电阻, 所述检测电阻的个数与待测线路上的所述节点个 数相同, 将第一检测电阻两端分别连接于所述线路起点和第一节点, 使所 述第一检测电阻与第一检测段的待测线路并联; 将第二检测电阻两端分别 连接于所述线路起点和第二节点, 使所述第二检测电阻与第一检测段和第 二检测段的待测线路并联; 将第三检测电阻两端分别连接于所述线路起点 和第三节点, 使所述第三检测电阻与第一检测段、 第二检测段和第三检测 段的待测线路并联, 以此类推, 将最后一个检测电阻两端分别连接于所述 线路起点和与所述线路终点相邻的节点; 将控制设备一端连接于所述线路 终点, 另一端接地; 将输出设备与所述控制设备相连接以输出其检测结果; 根据各所述检测电阻、 控制设备以及待测线路的参数来计算所述线路 终点电压的多个标准值;
利用所述控制设备对所述线路终点进行实际电压采集, 并将实际测得 的线路终点电压值与多个所述标准值相比较, 进而推出断路故障所在的位 置, 得出检测结果;
将得出的故障位置检测结果传送到所述输出设备进行输出。
8、根据权利要求 7所述的线路故障分段检测方法, 其特征在于, 计算 多个所述标准值包括:
设所述第一检测段存在断路故障, 计算所得所述线路终点电压定义为 第一标准值;
设所述第二检测段存在断路故障, 计算所得所述线路终点电压定义为 第二标准值;
设所述第三检测段存在断路故障, 计算所得所述线路终点电压定义为 第三标准值; 以此类推, 设最后一检测段存在断路故障, 计算所得所述线路终点电 压为最后标准值, 所述最后标准值等于 0;
所述第一标准值最大, 其余各所述标准值依次减小, 所述第一标准值 小于所述线路起点电压。
9、根据权利要求 8所述的线路故障分段检测方法, 其特征在于, 所测 得的所述线路终点实际电压大于所述第一标准值小于所述线路起点电压, 则判定所述第一检测段的待测线路存在断路故障;
所述线路终点实际电压大于所述第二标准值小于所述第一标准值, 则 判定所述第二检测段的待测线路存在断路故障;
所述线路终点实际电压大于所述第三标准值小于所述第二标准值, 则 判定所述第三检测段的待测线路存在断路故障;
以此类推, 所述线路终点实际电压介于最后两标准值之间, 则判定最 后一段检测段的待测线路存在断路故障。
10、 根据权利要求 7所述的线路故障分段检测方法, 其特征在于, 所 述控制设备具有门槛电压, 控制所有所述检测电阻的并联电阻值, 以使所 述线路终点电压小于所述门槛电压。
PCT/CN2012/074312 2011-10-31 2012-04-18 线路故障分段检测装置及检测方法 WO2013063904A1 (zh)

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