CN105783685A - High-speed railway switch point closure state testing method and system - Google Patents

Abstract

The invention provides a high-speed railway switch point closure state testing method and system. The method comprises the steps of (A) recording the initial position and initial voltage value of a sensor magnetic block, (B) moving the magnetic block and collecting a voltage value, (C) with the square minimization of the difference of a position actual measurement value and a fitting value, fitting the linear relation between a magnetic block position and a voltage value, and (D) measuring the high-speed railway switch point closure state with the linear relation. By using the high-speed railway switch point closure state testing method and system of the invention, the hysteresis quality and economic efficiency of a traditional manual field detection method are avoided. In addition, with the application of the wireless sensing network technology in high-speed railway infrastructure detection, the project of the system is easy to realize with the efficient and practical detection method and clear implementation steps.

Description

A kind of high-speed railway switch close-fitting state method of testing and system

Technical field

The present invention relates to field of traffic facilities, especially relate to the range sensor measuring technology of monitoring means of transportation.

Background technology

Railway switch is the key foundation equipment of driving, and it uses state unimpeded with traffic safety directly related.But track switch has the features such as quantity is many, structure is complicated, service life is short, restriction train speed, travel safety is low, maintenance has high input, with curve, joint the three big weak links being called track simultaneously.Particularly on the Line for Passenger Transportation that the speed of service is higher, track switch becomes restriction and allows the capital equipment of Negotiation speed.

The construction of the 6th railway speed raising of China and Line for Passenger Transportation, has higher requirement to the safety and reliability of railway switch.But due to railway speed increase, long-distance operation vehicle increases, the departure interval is gradually shortened etc., and problem brings a lot of potential safety hazards to railway transportation, and the maintenance of the track switch of China is keeped in repair after mostly being fault, fault on high-speed line will have a strong impact on the operation of railway, and great vehicle accident even can occur.So, the Specifeca tion speeification affecting track switch is monitored, just becomes the important means ensureing track switch equipment safety and track switch maintenance.Currently, the monitoring safety status technology of track switch is all being studied by many scientific research institutions, but still encounters many problems, for instance can not effectively install monitoring device, cannot be avoided the impact of some act of god factors on the spot, be difficult to know that the reliability worked long hours in real time has many problems such as high.

Summary of the invention

In view of this, the present invention is directed to the problem lacked in prior art for high-speed railway switch close-fitting state means of testing, a kind of high-speed railway switch close-fitting state method of testing is proposed, switch closure state is detected by " position-function of voltage curve matching " method of employing, such that it is able to accurately detect track switch service state by remote collection sensor voltage information.

In order to realize this purpose, the technical scheme that the present invention takes is as follows.

A kind of high-speed railway switch close-fitting state method of testing, including step:

A, the initial position recording sensor magnetic piece and initial voltage value；

B, mobile magnetic piece, gather magnitude of voltage；

C, with square minimum linear relationship for target, between matching magnetic piece position and magnitude of voltage of position measured value Yu the difference of match value；

D, with described linear relationship measure high-speed railway switch close-fitting state.

Further, the described difference with position measured value and match value square minimum for target, the linear relationship between matching magnetic piece position and magnitude of voltage is:

S (t)=a+bV (t),

Wherein S (t) is position, and V (t) is magnitude of voltage,

$a=\stackrel{\‾}{D\left(t\right)}-b\stackrel{\‾}{V\left(t\right)},$

$b=\frac{\stackrel{\‾}{V\left(t\right)}\·\stackrel{\‾}{D\left(t\right)}-\stackrel{\‾}{V\left(t\right)D\left(t\right)}}{{\left(\stackrel{\‾}{V\left(t\right)}\right)}^2-V{\left(t\right)}^2},$

$\stackrel{\‾}{V\left(t\right)}=\frac{1}{n}\underset{t=1}{\overset{n}{\Σ}}V\left(t\right),$

$\stackrel{\‾}{D\left(t\right)}=\frac{1}{n}\underset{t=1}{\overset{n}{\Σ}}D\left(t\right),$

$\stackrel{\‾}{V\left(t\right)D\left(t\right)}=\frac{1}{n}\underset{t=1}{\overset{n}{\Σ}}V\left(t\right)D\left(t\right),$

$\stackrel{\‾}{V{\left(t\right)}^2}=\frac{1}{n}\underset{t=1}{\overset{n}{\Σ}}V{\left(t\right)}^2,$

V (t) is the magnitude of voltage of each measurement,

D (t) is the position of each measurement,

N is pendulous frequency.

Additionally, the present invention is also claimed a kind of high-speed railway switch close-fitting state test system, including information Perception terminal, data processing platform (DPP) and operating board, wherein,

Track switch duty is monitored and recorded to information Perception terminal in real time, and positional information and the magnitude of voltage measured and collect are sent to data center,

Magnetic piece is moved in operating board adjustment, information Perception terminal gather magnitude of voltage and positional information；

Data center is used for the square minimum for target of the difference with position measured value and match value, linear relationship between matching magnetic piece position and magnitude of voltage, and measure high-speed railway switch close-fitting state by adopting the high-speed railway switch close-fitting state method of testing of the present invention with described linear relationship, track switch service state is accurately detected, it is to avoid the hysteresis quality of Traditional Man in-situ check and test method and economy by remote collection sensor voltage information.Additionally, the application detected at high speed railway foundation facility along with sensor network technology, its efficient, practical detection method and implement step clearly and be easier to the Project Realization of system.

Accompanying drawing explanation

Fig. 1 is the schematic flow sheet of specific embodiment of the invention high speed railroad switch point closure state test method.

Fig. 2 is the structural representation of specific embodiment of the invention high speed railroad switch point closure state verification system.

Detailed description of the invention

Below in conjunction with accompanying drawing, the present invention is elaborated.

The example embodiment that following discloses are detailed.But, concrete structure disclosed herein and function detail are merely for the sake of the purpose describing example embodiment.

It should be appreciated, however, that the present invention is not limited to disclosed particular exemplary embodiment, but cover all modifications, equivalent and the alternative that fall within the scope of the disclosure.In the description to whole accompanying drawings, identical accompanying drawing labelling represents identical element.

It will also be appreciated that term "and/or" includes one or more relevant any and all combination listing item as used in this.It will further be appreciated that when parts or unit are referred to as " connection " or during " coupled " to another parts or unit, it can be directly connected or coupled to miscellaneous part or unit, or can also there is intermediate member or unit.Additionally, be used for describing other words of relation between parts or unit should understand in the same fashion (such as, " and between " to " directly between ", " adjacent " to " direct neighbor " etc.).

With reference to Fig. 1, it is shown that the schematic flow sheet of a kind of high-speed railway switch close-fitting state detection method, described concrete grammar comprises the steps.

Step 1, on shell to dress magnetostrictive displacement sensor carry out coordinate demarcation.

Step 2, determine the initial position D (0) of sensor magnetic piece, with the transducer calibration scale of magnetic piece left alignment for benchmark metric position.

Step 3, gather current location initial voltage value V (0).Sensor acquisition, to current initial voltage value, is sent to host computer server by Sensor Network.

Step 4, mobile magnetic piece, obtain position D (t) and current voltage V (t) of current time.

Position-information of voltage matching position-function of voltage curve that step 5, basis collect；The position obtained-function of voltage relation is:

S (t)=a+bV (t)

The magnetic piece position that S (t) obtains for matching, V (t) measures the magnitude of voltage arrived, and a, b is fitting coefficient.

The deviation between measured value and Equation for Calculating magnitude of voltage out each time is

For the deviation between measured value and match value.

According to principle of least square method, the value of a, b should make to be ownedThe deviation of directivity square sum, namelyFor minima.

Making W is zero to the first-order partial derivative of a, b, can obtain:

$\frac{\∂W}{\∂a}=-2\underset{t=1}{\overset{n}{\Σ}}-a-bV\left(t\right)=0$

$\frac{\∂W}{\∂b}=-2\underset{t=1}{\overset{n}{\Σ}}V\left(t\right)\left(D\right(t)-a-bV(t\left)\right)=0$

After arrangement:

$a+\stackrel{\‾}{V\left(t\right)}b=\stackrel{\‾}{D\left(t\right)},$

$\stackrel{\‾}{V}\left(t\right)a+\stackrel{\‾}{V{\left(t\right)}^{2}b}=\stackrel{\‾}{V\left(t\right)D\left(t\right)}.$

Simultaneous can obtain:

$a=\stackrel{\‾}{D\left(t\right)}-b\stackrel{\‾}{V\left(t\right)};$

$b=\frac{\stackrel{\‾}{V\left(t\right)}\·\stackrel{\‾}{D\left(t\right)}-\stackrel{\‾}{V\left(t\right)D\left(t\right)}}{{\left(\stackrel{\‾}{V\left(t\right)}\right)}^2-V{\left(t\right)}^2},$

Wherein: $\stackrel{\‾}{V\left(t\right)}=\frac{1}{n}\underset{t=1}{\overset{n}{\Σ}}V\left(t\right),$

$\stackrel{\‾}{D\left(t\right)}=\frac{1}{n}\underset{t=1}{\overset{n}{\Σ}}D\left(t\right),$

$\stackrel{\‾}{V\left(t\right)D\left(t\right)}=\frac{1}{n}\underset{t=1}{\overset{n}{\Σ}}V\left(t\right)D\left(t\right),$

$\stackrel{\‾}{V{\left(t\right)}^2}=\frac{1}{n}\underset{t=1}{\overset{n}{\Σ}}V{\left(t\right)}^2.$

By a, b determined equation S (t)=a+bV (t) exactly by data (V (t), D (t)) the institute matching given best straight line out, i.e. voltage-position function curve.

Step 6, any movable sensor magnetic piece, survey position and the information of voltage of reality respectively, compare with the function result of calculation of matching, verify the accuracy of this detection method with slide gauge and circuit tester.

As shown in Figure 2, it is shown that the population structure schematic diagram of native system, main thought is as follows.

The test system of the present invention is made up of three parts: " information Perception terminal ", " data processing platform (DPP) " and " operating board ".Wherein, track switch service state is monitored and recorded to information Perception terminal in real time, and positional information and the information of voltage measured and collect are sent to data center in real time.

Information Perception terminal is sent to the data of data center, position-function of voltage for matching track switch, then the positional information measured with reality is compared, and fitting function is optimized, the voltage signal that may finally pass through to record calculates the accurate location of magnetostrictive displacement sensor, thus drawing the close-fitting state of high-speed railway switch.

Therefore, the present invention includes a kind of high-speed railway switch close-fitting state method of testing, including step:

A, the initial position recording sensor magnetic piece and initial voltage value；

B, mobile magnetic piece, gather magnitude of voltage；

C, with square minimum linear relationship for target, between matching magnetic piece position and magnitude of voltage of position measured value Yu the difference of match value；

D, with described linear relationship measure high-speed railway switch close-fitting state.

Wherein, the described difference with position measured value and match value square minimum for target, the linear relationship between matching magnetic piece position and magnitude of voltage is:

S (t)=a+bV (t),

Wherein S (t) is position, and V (t) is magnitude of voltage,

$a=\stackrel{\‾}{D\left(t\right)}-b\stackrel{\‾}{V\left(t\right)},$

$b=\frac{\stackrel{\‾}{V\left(t\right)}\·\stackrel{\‾}{D\left(t\right)}-\stackrel{\‾}{V\left(t\right)D\left(t\right)}}{{\left(\stackrel{\‾}{V\left(t\right)}\right)}^2-V{\left(t\right)}^2},$

$\stackrel{\‾}{V\left(t\right)}=\frac{1}{n}\underset{t=1}{\overset{n}{\Σ}}V\left(t\right),$

$\stackrel{\‾}{D\left(t\right)}=\frac{1}{n}\underset{t=1}{\overset{n}{\Σ}}D\left(t\right),$

$\stackrel{\‾}{V\left(t\right)D\left(t\right)}=\frac{1}{n}\underset{t=1}{\overset{n}{\Σ}}V\left(t\right)D\left(t\right),$

$\stackrel{\‾}{V{\left(t\right)}^2}=\frac{1}{n}\underset{t=1}{\overset{n}{\Σ}}V{\left(t\right)}^2,$

V (t) is the magnitude of voltage of each measurement,

D (t) is the position of each measurement,

N is pendulous frequency.

Corresponding with the high-speed railway switch close-fitting state method of testing of the present invention, the invention also discloses a kind of high-speed railway switch close-fitting state test system, including information Perception terminal, data processing platform (DPP) and operating board, wherein,

Track switch duty is monitored and recorded to information Perception terminal in real time, and positional information and the magnitude of voltage measured and collect are sent to data center,

Magnetic piece is moved in operating board adjustment, information Perception terminal gather magnitude of voltage and positional information；

Data center is used for the square minimum for target of the difference with position measured value and match value, the linear relationship between matching magnetic piece position and magnitude of voltage, and measures high-speed railway switch close-fitting state with described linear relationship.

It should be noted that; above-mentioned embodiment is only the present invention preferably embodiment; can not being understood as limiting the scope of the invention, without departing under present inventive concept premise, any minor variations that the present invention is done and modification belong to protection scope of the present invention.

Claims (3)

1. a high-speed railway switch close-fitting state method of testing, including step:

A, the initial position recording sensor magnetic piece and initial voltage value；

B, mobile magnetic piece, gather magnitude of voltage；

C, with square minimum linear relationship for target, between matching magnetic piece position and magnitude of voltage of position measured value Yu the difference of match value；

D, with described linear relationship measure high-speed railway switch close-fitting state.

2. the high-speed railway switch close-fitting state method of testing according to claim 1, it is characterised in that the described difference with position measured value and match value square minimum for target, the linear relationship between matching magnetic piece position and magnitude of voltage is:

S (t)=a+bV (t),

Wherein S (t) is position, and V (t) is magnitude of voltage,

$a=\stackrel{\‾}{D\left(t\right)}-b\stackrel{\‾}{V\left(t\right)},$

$b=\frac{\stackrel{\‾}{V\left(t\right)}\·\stackrel{\‾}{D\left(t\right)}-\stackrel{\‾}{V\left(t\right)D\left(t\right)}}{{\left(\stackrel{\‾}{V\left(t\right)}\right)}^2-V{\left(t\right)}^2},$

$\stackrel{\‾}{V\left(t\right)}=\frac{1}{n}\underset{t=1}{\overset{n}{\Σ}}V\left(t\right),$

$\stackrel{\‾}{D\left(t\right)}=\frac{1}{n}\underset{t=1}{\overset{n}{\Σ}}D\left(t\right),$

$\stackrel{\‾}{V\left(t\right)D\left(t\right)}=\frac{1}{n}\underset{t=1}{\overset{n}{\Σ}}V\left(t\right)D\left(t\right),$

$\stackrel{\‾}{V{\left(t\right)}^2}=\frac{1}{n}\underset{t=1}{\overset{n}{\Σ}}V{\left(t\right)}^2,$

V (t) is the magnitude of voltage of each measurement,

D (t) is the position of each measurement,

N is pendulous frequency.

3. a high-speed railway switch close-fitting state test system, including information Perception terminal, data processing platform (DPP) and operating board, wherein,

Track switch duty is monitored and recorded to information Perception terminal in real time, and positional information and the magnitude of voltage measured and collect are sent to data center,

Magnetic piece is moved in operating board adjustment, information Perception terminal gather magnitude of voltage and positional information；

Data center is used for the square minimum for target of the difference with position measured value and match value, the linear relationship between matching magnetic piece position and magnitude of voltage, and measures high-speed railway switch close-fitting state with described linear relationship.