CN116499564A - Track scale of non-foundation pit continuous rail bogie metering structure - Google Patents

Abstract

The invention relates to the technical field of automatic track scales, and discloses a track scale of a metering structure of a non-foundation pit continuous track bogie, which comprises a Y-shaped track weighing detection sensing device module assembly and a track pad sensor with double vertical force output, wherein the Y-shaped track weighing detection sensing device module assembly is permanently fixed on a steel rail web through a clamp, and the Y-shaped track weighing detection sensing device assembly is arranged on the track pad sensor. The track scale of the metering structure of the non-foundation pit continuous track bogie can be provided with the sensor with a shearing force function without drilling and welding on the rail web of the steel rail, so that the continuous track characteristic of the dynamic track scale is ensured; the structure compounded by the invention keeps the characteristic of no foundation pit of the dynamic rail scale; the invention breaks through the limitation that the attached steel rail wheel weight sensor needs to be installed on the steel rail in an on-line drilling mode, and the practical patent is that the output signal of the clamping contact type steel rail wheel weight sensor is weak.

Description

Track scale of non-foundation pit continuous rail bogie metering structure

Technical Field

The invention relates to the technical field of automatic rail balances, in particular to a rail balance of a non-foundation pit continuous rail bogie metering structure.

Background

Currently, the national standard GB/T11885-2015 of automatic track scale in China (namely dynamic track scale) is divided into the grades of 2, 1, 0.5, 0.2 and five metering accuracy.

To date, various dynamic rail balances without foundation pits (including various deep foundation pit structures and various shallow foundation pit structures) and with continuous rails (including broken rail structures) have not been approved by the national market supervision department for issuing 0.5-grade and 0.2-grade automatic rail balance type approval certificates, which means that the metering accuracy of automatic rail balances (or dynamic rail balances) for trade and trade settlement in China is always maintained at the technical level of metering of bulk materials of grade 2 (low accuracy) and grade 1 (medium accuracy).

The accuracy of trade settlement and the level of metering technology relate to fair buying and selling and require technical innovation.

For the last thirty years, we have invented (including novel and practical) various patent technologies related to foundation pit-free continuous track weighing technology in the past, namely, the invention patent: plug-in wheel load force transducer, the invention of the patent: attached steel rail wheel weight sensor is as follows: four-in-one sensor, the following practical patents: composite continuous rail weighing device is as follows: a composite continuous rail whole car weighing device is composed of static and dynamic three-in-one rail pad sensor, rail pad type non-foundation pit continuous rail balance, clamping contact type rail wheel weight sensor, invention patent acceptance-special line overload and so on. To date, no railway safety accident occurs or is caused by the railway safety accident, and great contribution is made to the technical development of fair transaction, safe transportation and accurate formulation and rapid metering of industrial and mining enterprise products in the field in China.

In order to eliminate the problem of the use unit that the sensor is installed by drilling holes in the rail web (or by welding the rail web), the sensor is installed after the rail web is drilled or by welding the rail web, which is an issue of safety.

Early, we studied and invented a Guan patent: the attached steel rail wheel weight sensor is characterized by comprising a clamping contact type steel rail wheel weight sensor, wherein the clamping contact type steel rail wheel weight sensor is used for realizing technical innovation and exploration of a non-drilling sensor in a non-foundation pit continuous rail weighing device, and good practical results are obtained.

Initially, we developed an invention patent for installing a sensor without drilling: the main purpose of the clamp contact type steel rail wheel weight sensor is to replace the prior art patent that the sensor needs to be installed on the steel rail web through drilling holes: the plug-in wheel weight force transducer is applied to the field of quick safety detection of railway goods trains in China and the field of medium-high speed safety detection of motor cars and high-speed railways.

Along with the development of weighing technology and automation of a dynamic rail scale, a dynamic rail scale (or a dynamic rail weighing device applied to industrial and mining enterprises) structure is expected to realize a sensor structure with a continuous rail shearing force function on the premise of not drilling and welding rail web of a steel rail, 0.5-level metering accuracy with a foundation pit-free continuous rail characteristic and quick installation and quick maintenance.

The conventional dynamic rail balance structure generally has the following three types:

the research work of the structure of the traditional foundation pit-free continuous rail composite dynamic rail weighbridge, also called as beam-free continuous rail dynamic rail weighbridge, starts in 2002 and is incorporated into the national standard of automatic rail weighbridge in 2015.

The non-foundation pit continuous rail-breaking composite dynamic rail weighbridge (or non-beam continuous rail-breaking dynamic rail weighbridge) is characterized in that a sensor with a non-foundation pit and shearing force function is installed after drilling is carried out on a rail web of a steel rail, namely 2008, the self-invention patent of the invention is: the structure formed by compounding the stuffing-in wheel load force sensor and the rail pad sensor with single-way output has the following problems:

drilling holes on the web plate of the rail web of the steel rail, and installing the plug-in type sensor with a shearing force function requires high accuracy and low speed of drilling holes.

On busy national railway lines, the web of the rail is drilled and the travelling plan is required to be interrupted.

The technical requirements for installation and replacement are high, and the accuracy of the system can be directly influenced by the quality of the installation technology.

Dynamic rail balance with beam type broken rail structure

Dynamic rail scale with beam type rail break structure = foundation pit structure (or shallow foundation pit) +structure such as column type sensor + girder+ (or weighing platform) +transition rail

The problems are that:

the weighing rail on the weighing platform is connected with the outer rail through a transition rail, and the weighing rail is connected in a rail breaking mode, so that when the wheels travel to the joint positions of the steel rails, the weighing rail, the weighing platform mechanical equipment, the sensors and the like are very easy to balance, and impact, vibration and large maintenance quantity are brought.

The dynamic rail balance with the broken rail structure has relatively poor safety, and the rail balance needs to be driven at a speed limit (low speed) in the metering process or during normal running, so that the traffic capacity of a line is restricted.

The mechanical structure is complex, and the maintenance amount is large; the concrete foundation cavity of the mechanical balance body is complex, and the civil engineering cost is high.

The foundation structure of the shallow foundation pit or the deep foundation pit is easy to accumulate water and corrode the scale body.

The rail joint position at the broken rail is frozen in winter when being subjected to rain and snow, which is very easy to cause incapability of metering or misalignment of metering.

The limit control requirement for preventing the scale platform from shaking back and forth and left and right is strict.

Dynamic rail balance with beam type continuous rail

After 2014, the dynamic rail balance (old product) with the beam type broken rail structure is developed by technical improvement or technical transformation into a continuous rail structure.

The structure of a sensor with a shearing force function (2008, an invention patent of the invention: a plug-in wheel load force sensor), a deep foundation pit, a column type sensor, a weighing platform and a girder, which is called as a deep foundation pit continuous rail dynamic rail balance or a continuous rail girder dynamic rail balance, is adopted after a steel rail web is drilled.

After drilling holes on the rail web of the steel rail, a structure of a structure sensor with a shearing force function (2008, the self-invention patent of the plug-in type wheel load force sensor) +a shallow foundation pit) +a column type and the like and a girder (or weighing platform) is installed, namely a structure called a 'shallow foundation pit continuous rail dynamic rail balance', or a 'continuous rail girder dynamic rail balance'.

The problems are that:

the mechanical structure is complex, and the maintenance amount is large; the concrete foundation cavity of the mechanical balance body is complex, and the civil engineering cost is high.

The foundation structure of the shallow foundation pit or the deep foundation pit is easy to accumulate water and corrode the mechanical scale body.

Drilling is carried out on a web plate of a rail web of a steel rail, and a 'plug-in type wheel load force sensor' with a shearing force function is installed, so that high drilling precision is required.

Drilling holes in webs of rail web of steel rail web in busy national railway, and stopping driving plan is needed.

The requirement for installing and replacing the sensor is high, and the accuracy of the system is directly affected.

The limit control requirement for preventing the scale platform from shaking back and forth and left and right is strict.

It can be seen that there is a need for a track scale without a pit continuous track bogie metering structure that solves the above problems.

Disclosure of Invention

The invention aims to provide a track scale without a foundation pit and a continuous track bogie metering structure, so as to solve the problems in the background technology.

In order to solve the technical problems, the invention provides the following technical scheme: the utility model provides a no foundation ditch continuous track bogie metering structure's track scale, includes Y type track weighing detection sensing device module and two perpendicular force output's rail pad sensor, Y type track weighing detection sensing device module passes through anchor clamps to be permanently fixed in the rail web of rail, Y type track weighing detection sensing device module includes: the left side and the right side of the two Y-shaped track weighing sensors are combined into a complete Y-shaped track weighing detection sensor, wherein: the device comprises a left side Y-shaped track weighing sensor, a right side Y-shaped track weighing sensor, a mounting base, an adjustable positioning rod, a locking buckle, a special clamping compression bar, a steel rail or a rigid member part;

the rail pad sensor with double vertical force output comprises an elastic body, a resistance strain gauge, elastic strip fastener fixing screw holes, elastic strips, elastic strip accessories, steel rail positioning grooves, damping rubber pads, steel rails, circuits, compensation plates, silica gel, nitrogen and stainless steel sealing welding covers, sensor mounting fixing holes, sensor high-strength fixing bolts and accessories, waterproof sealing joints, double-path output shielding cables, sensor mounting bases and embedded steel plates of a concrete foundation.

Preferably, the Y-shaped track weighing detection sensing device module is clamped on a steel rail or a rigid member, or is directly adhered to a web plate of the steel rail or the web plate of the rail web of the rigid member by adopting metal glue.

Preferably, the Y-shaped track weighing sensors on the left side and the right side of the rail web of the steel rail are composed of an elastomer, a Wheatstone bridge, a compensation circuit board, a waterproof sealing outlet connector, a shielding signal cable, sealant and inert gas in a cavity, a flexible transition isolation area, a three-grab resistor strain gauge, a stress control area cavity web, an anti-slip damping contact surface, a Y-shaped track weighing sensor fixing and a moment applying positioning hole.

Preferably, R1 and R2 in the Wheatstone bridge and the compensation circuit board are pull-to-resistance strain gauges; r3 and R4 are pressed resistance strain gauges; rct/2 is the elastic modulus compensation resistor; r0 is output resistance standardized compensation resistance; rz is zero output compensation resistor; rs is sensitivity coefficient compensation resistance; ri, input resistance standardized compensation resistance; RL is a nonlinear compensation resistor; rmt sensitivity temperature compensation resistor; rt is zero temperature compensation resistor; rp is a linear compensation resistor for sensitivity temperature compensation; "U+" is the positive pole of bridge supply; "U-" is the negative pole of the bridge supply; "E+" is the signal output positive electrode; "E-" is the negative electrode of signal output.

Preferably, when P >0, the resistance strain gages R1, R3 exhibit tensile stress when the rail or the rigid member is deformed, and the resistance strain gages R2, R4 exhibit compressive stress when the rail or the rigid member is deformed.

Preferably, the resistance strain gauges R1, R2, R3 and R4 on the left and right Y-shaped track weighing sensor elastic bodies are synthesized into a complete Y-shaped track weighing detection sensor through a Wheatstone bridge circuit and a compensation circuit board.

Preferably, the Y-shaped track weighing detection sensing device outputs a triangular waveform, and the double vertical force output track pad sensor outputs a trapezoidal waveform.

Preferably, the triangular waveform characteristics output by the Y-shaped track weighing detection sensing device are overlapped and complemented with the trapezoidal waveform output by the double vertical force output track pad sensor to form a rectangular waveform which is suitable for dynamic track scale.

Preferably, the resistance strain gauge of the dual vertical force output rail pad sensor consists of a pair of pull tabs and a pressing sheet;

wherein the method comprises the steps of

R1, R3, R5, R7, R9, R11, R13 and R15 are pull tabs;

r2, R4, R6, R8, R10, R12, R14 and R16 are tabletting.

Preferably, R1, R2, R3, R4, R5, R6, R7 and R8 and the compensation circuit form a vertical force sensor A with independent output through a Weston bridge circuit;

R9, R10, R11, R12, R13, R14, R15 and R16 and the compensation circuit form another independent output vertical force sensor B through a Weston bridge circuit.

Compared with the prior art, the invention has the following beneficial effects:

the sensor with the shearing force function can be installed without drilling and welding on the rail web of the steel rail, so that the continuous rail breaking characteristic of the dynamic rail scale is ensured;

the structure compounded by the invention keeps the characteristic of no foundation pit of the dynamic rail scale;

the invention breaks through the limitation that the attached steel rail wheel weight sensor needs to be installed on the steel rail in an on-line drilling way, and the practical patent is that the output signal of the clamping contact type steel rail wheel weight sensor is weak;

in the invention, a sensor with a shearing force function is adopted, and the following two modes can be adopted;

the modular installation method of the Y-type track weighing detection sensing device is adopted, and a special fixture is used for fixing, so that nondestructive installation is realized, drilling of a steel rail web plate position is not required, electric welding of the steel rail web plate position is not required, and modularization rapid installation, rapid maintenance and rapid updating can be realized by utilizing running clearance time;

the invention can also directly adopt a Y-shaped track weighing sensor structure, the Y-shaped track weighing sensor is adhered to the rail web of the steel rail through special metal glue, the three-grab anti-slip damping contact surface is coated with special metal glue with uniform thickness, the special clamp is used for clamping according to a certain pressing force, after the steel rail is naturally solidified at a constant temperature for 12 hours, the clamp is removed, the nondestructive installation is realized, the drilling of the position of the web of the steel rail is not required, the electric welding of the position of the web of the steel rail is not required, the running clearance is utilized, and the quick adhering installation, the quick maintenance and the quick updating are realized;

The rail pad sensor with double vertical force output is adopted, so that under the condition that the effective weighing area is of a certain length at the same metering speed, the acquired metering data is doubled, the technical breakthrough of the dynamic rail balance accuracy from 1 level to 0.5 level to 0.2 level is facilitated, and the accuracy of a dynamic rail balance system is less than or equal to 0.5 level;

the rail pad sensor with double vertical force output is beneficial to the system to timely compare, judge and remove the measured wheel, and is beneficial to the improvement of the accuracy of the dynamic rail scale system due to sudden impact caused by the flat, out-of-round and flanging of the wheel and abnormal abrupt change data of the flanging clamping rail of the weighing rail.

Drawings

FIG. 1 is a schematic diagram of a module assembly of a Y-type track weighing detection sensing device of the present invention;

FIG. 2 is a schematic diagram of a Y-type track weighing sensor of the present invention;

FIG. 3 is a schematic diagram of a left and right Y-shaped track weighing sensor stuck by metal glue;

FIG. 4 is a schematic view of a Y-type track weighing sensor on the left side of a rail web of the present invention;

FIG. 5 is a schematic view of a Y-type track load cell of the present invention on the right side of a rail web;

FIG. 6 is a diagram of a left and right side Y-type track weighing sensor resistive strain gauge arrangement of the present invention;

FIG. 7 is a schematic diagram of the stress of the Y-type track weighing detection sensing device;

FIG. 8 is a diagram showing the deformation analysis of the Y-type track weighing detection sensor module when P >0 according to the present invention;

FIG. 9 is a graph showing the analysis of the metal paste adhesion deformation of the Y-type track weighing sensor when P > 0;

FIG. 10 is a schematic diagram of a Wheatstone bridge circuit and its compensation electronics in accordance with the present invention;

FIG. 11 is a signal synthesis diagram of the Y-type track weighing detection sensing device A, B of the invention;

FIG. 12 is a schematic diagram of an assembly of a dual vertical force output rail pad sensor of the present invention;

FIG. 13 is a diagram of a dual vertical force output rail sensor resistive strain gauge arrangement of the present invention;

FIG. 14 is a two-way diagram of an A-way parallel connection of n dual vertical force output rail pad sensors of the present invention;

FIG. 15 is a B-path parallel two-path diagram of n dual vertical force output rail pad sensors of the present invention;

FIG. 16 is a schematic diagram of a dual vertical force pad sensor A, B path output measurement in accordance with the present invention;

FIG. 17 is a graph showing a comparison of the output waveforms of the Y-type track weighing detection sensing device and the double vertical force rail pad A;

FIG. 18 is an automated railroad track scale measurement principle of the present invention;

fig. 19 is a schematic block diagram of the system of the present invention.

Wherein: 1. a mounting base; 2. an adjustable positioning rod; 3. locking buckles; 4. a left Y-type track weighing sensor; 5. a special clamping compression bar; 6. the left side is Y-shaped, anti-slip and damping three-grab; 7. rails or rigid members; 8. y-shaped anti-slip damping three-grab on the right side; 9. right Y-shaped track weighing sensor; A. an elastomer; B. a Wheatstone bridge and a compensation circuit board; C. waterproof sealing wire outlet connector; D. shielding the signal cable; E. sealant and inert gas in the cavity; F. a flexible transition isolation region; G. three grabs; H. resistance strain gauge; I. a stress control zone cavity web; J. an anti-slip damping contact surface; K. fixing a Y-shaped track weighing sensor and applying torque to a positioning hole; 10. an elastomer; 11. resistance strain gauge; 12. the elastic strip fastener is fixed with the screw hole; 13. spring strip and spring strip attachment; 14. a steel rail positioning groove; 15. damping rubber cushion; 16. a steel rail; 17. a circuit and a compensation board; 18. a silica gel and nitrogen gas and stainless steel sealing welding cover; 19. a sensor mounting fixing hole; 20. high-strength fixing bolts and accessories of the sensor; 21. a waterproof sealing joint; 22. a two-way output shielded cable; 23. a sensor mounting base; 24. and (5) embedding steel plates of the concrete foundation.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1-19, a track scale of a metering structure of a non-foundation pit continuous track bogie, wherein a Y-shaped track weighing detection sensing device module is shown in fig. 1, and is formed by combining a Y-shaped track weighing detection sensing device module and a double-vertical force output track pad sensor shown in fig. 12;

or the Y-shaped rail weighing sensor shown in figure 2 is directly adhered to the web plate of the rail web of the steel rail (containing section steel) by adopting special metal adhesive, and the Y-shaped rail weighing sensor shown in figure 1 and the rail pad sensor with double vertical force output are compounded;

the device comprises a Y-shaped track weighing detection sensing device module assembly with a shearing function or a rail pad sensor which directly adopts special metal glue to paste a Y-shaped track weighing sensor on the rail web of a steel rail and outputs double vertical forces, a concrete embedded steel plate foundation, the steel rail, a fastener, an electric appliance, software and the like. Wherein:

The steel rail can be a light rail, a heavy rail, a crane steel rail or a profile steel with the standard length of 12.5 meters or 25 meters.

The foundation can be a concrete embedded steel plate foundation, a concrete-poured special cement sleeper embedded foundation, a concrete-poured profile steel embedded foundation and a concrete-poured steel frame embedded foundation.

The Y-shaped track weighing detection sensing device module or the Y-shaped track weighing sensor is permanently fixed on the rail web of the steel rail through a clamp by adopting the Y-shaped track weighing detection sensing device module assembly figure 1, or the Y-shaped track weighing sensor figure 2 is stuck on the rail web of the steel rail through a special metal adhesive;

y type track weighing detection sensing device module adopts the Y type track weighing detection sensing device subassembly that belongs to modular structure, and the fig. 1 shows, includes: the left and right side two Y-shaped track weighing sensors are combined into a complete set of Y-shaped track weighing detection sensors, as shown in figure 2, wherein: the left Y-shaped track weighing sensor (mounted on the front surface of the component and shown in figure 4), the right Y-shaped track weighing sensor (mounted on the back surface of the component and shown in figure 5), the mounting base 1, the adjustable positioning rod 2, the locking buckle 3, the special clamping compression rod 4, the steel rail or the rigid component 5 and other components form the figure 1.

The Y-shaped track weighing sensor is adopted as shown in figure 2, the principle of the modularized structure of the Y-shaped track weighing detection sensing device is the same (the assembly method is different),

when adopting Y type track weighing sensor, need paste through special metal glue figure 3 mode, temporary clamping frock when being equipped with special metal glue and paste includes: left Y-shaped track weighing sensor (mounted on the front surface of the component in figure 4), right Y-shaped track weighing sensor (mounted on the back surface of the component in figure 5), special metal glue and temporary clamping tool.

The Y-shaped track weighing sensors on the left side and the right side of the steel rail web are respectively composed of an elastomer A, a Wheatstone bridge, a compensation circuit board B, a waterproof sealing outlet connector C, a shielding signal cable D, sealant and inert gas E in a cavity, a flexible transition isolation area F, a three-grab G, resistance strain gauges H (R1, R2, R3 and R4) which are arranged and adhered on the inner side of the cavity web of the stress control area, a figure 6 of the cavity web of the stress control area, an anti-skid damping contact surface J, Y type track weighing sensor fixing and moment applying positioning hole K and the like.

The principle of the Y-shaped track weighing detection sensing device module or the Y-shaped track weighing sensor is analyzed as follows according to the stress of the Y-shaped track weighing detection sensing device module in the figures 1-8;

Similarly, according to the Y-shaped track weighing sensor, the stress analysis of FIGS. 2-6 and 9 is as follows;

when P >0, the resistance strain gauges R1 and R3 are tensile stress when the steel rail or the rigid member is deformed, and the resistance strain gauges R2 and R4 are compressive stress when the steel rail or the rigid member is deformed. The resistance strain gauges R1, R2, R3 and R4 are synthesized into a complete Y-shaped track weighing detection sensor diagram 2 through a Wheatstone bridge circuit and a compensation circuit diagram 10, wherein the resistance strain gauges R1, R2, R3 and R4 on the left Y-shaped track weighing sensor elastomer and the right Y-shaped track weighing sensor elastomer are synthesized, and the following components are arranged in the whole Y-shaped track weighing detection sensor diagram, wherein:

r1 and R2 are pull-to-resistance strain gauges; r3 and R4 are pressed resistance strain gauges; rct/2 is the elastic modulus compensation resistor; r0 is output resistance standardized compensation resistance; rz is zero output compensation resistor; rs is sensitivity coefficient compensation resistance; ri, input resistance standardized compensation resistance; RL is a nonlinear compensation resistor; rmt sensitivity temperature (elastic modulus) compensation resistance; rt is zero temperature compensation resistor; rp is a linear compensation resistor for sensitivity temperature compensation; "U+" is the positive pole of bridge supply; "U-" is the negative pole of the bridge supply; "E+" is the signal output positive electrode; "E-" is the negative electrode of signal output.

Y-type track weighing detection sensing device or function of Y-type track weighing sensor

The device replaces a 'plug-in type wheel load force transducer' commonly used in a reciprocating continuous rail weighing device, and achieves nondestructive installation of steel rails or components;

the sensitivity output coefficient is improved, the technical problems of distortion caused by overlarge gain on weak signals in the past are overcome, and the method is extremely beneficial to improving the metering performance of the dynamic track scale and the accuracy, reliability and stability of the dynamic track scale;

the device replaces the conventional attached steel rail wheel weight sensor and clamping contact steel rail wheel weight sensor in the reciprocating continuous rail weighing device, greatly reduces the specific gravity of the early pretightening force which is too large and is easy to interfere normal shear stress transmission, and is beneficial to improving the linearization of the dynamic rail balance synthetic waveform and the improvement of the metering performance of the sensor;

the Y-shaped track weighing detection sensing device or the Y-shaped track weighing sensor is adopted, the adjacent wheels outside the weighing area can be still isolated from the weight influence of the adjacent wheels, and the characteristic of continuous rail breaking is realized.

A Y-shaped track weighing detection sensor device or a Y-shaped track weighing sensor is adopted, and a sensor in the device participates in weight compensation calculation;

the Y-shaped track weighing detection sensor device or the Y-shaped track weighing sensor is adopted to judge the direction of the coming vehicle;

A Y-shaped track weighing detection sensor device or a Y-shaped track weighing sensor is adopted to count the wheels or axles of the dynamic track scale in real time;

the Y-type track weighing detection sensor device or the Y-type track weighing sensor is adopted, so that the speed of the dynamic track scale when the dynamic track scale is overstocked can be measured;

the Y-shaped track weighing detection sensor device or the Y-shaped track weighing sensor is adopted, so that vehicles which advance, retreat and advance can be identified, and the automatic management of the railway freight yard on the safe marshalling of the railway vehicles is particularly adapted;

the triangular waveform characteristics output by the Y-shaped track weighing detection sensor device or the Y-shaped track weighing sensor are overlapped and complemented with the trapezoidal waveform output by the double-vertical-force output track pad sensor, so that a rectangular waveform which is suitable for dynamic track scales is formed.

Principle of measurement

Measurement principle of Y-shaped track weighing detection sensing device or Y-shaped track weighing sensor at A

A set of Y-shaped track weighing detection sensor module or Y-shaped track weighing sensor is arranged at a steel rail web plate or rigid member A between two sleepers, the Y-shaped track weighing sensor synthesized on the left side and the right side of the steel rail web plate or rigid member A is fixed (clamped) on a detection area with the best shearing stress effect of the steel rail or rigid member web plate A, when external force or wheel weight P acts on the steel rail or rigid member with supporting point support, when P >0, the steel rail or rigid member generates deflection bending deformation, and the magnitude of the shearing stress output by the Y-shaped track weighing sensor is shown in figure 8 or figure 9.

The deflection deformation of the steel rail or the rigid member is transferred to an anti-slip damping three-grip contact surface J of 120-degree distribution of the elastomer of the Y-shaped track weighing sensor, so that the elastomer A and a cavity web I of a stress control area are subjected to elliptical deformation, the extrusion force between the directions I and III in the figures 6-9 (in the control area) is increased and compressed, and the extrusion force between the directions II and IV is reduced (in the control area) and stretched.

The resistance values of R2 and R4 sheets of the resistance strain gauge wire grids adhered to the inner side of the cavity web of the stress control area along the direction of 45 degrees are reduced, and the resistance values are formed into pressed sheets; and the resistance values of the R1 and R3 sheets which are arranged along the 135-degree direction of the resistance strain gauge wire grid and stuck on the inner side of the cavity web of the stress control area are increased to form a pull tab.

Measurement principle of Y-shaped track weighing detection sensing device or Y-shaped track weighing sensor at A, B two positions

Two sets of Y-shaped track weighing detection sensing device modules or two sets of Y-shaped track weighing sensors are respectively arranged at two positions A, B of a steel rail web plate or a rigid member between two sleepers, and when an external force or a wheel weight P acts on the Y-shaped track weighing detection sensing device at the position A or the Y-shaped track weighing sensor at the position A, the shearing force measured by the Y-shaped track weighing sensor at the position A is QA. When an external force or a wheel weight P acts on a Y-shaped track weighing detection sensing device at the position B or two sets of Y-shaped track weighing sensors at the position B, the shearing force measured by the two sets of Y-shaped track weighing detection sensing devices or the two sets of Y-shaped track weighing sensors is QB, and the shearing force signals measured by the two sets of Y-shaped track weighing detection sensing devices or the two sets of Y-shaped track weighing sensors are synthesized into a figure 11, the Y-shaped track weighing detection sensing device or the Y-shaped track weighing sensors are arranged at two positions of rail waists (rigid members) A, B at the sleeper opening positions, railway specifications prescribe that the sleeper opening spacing is 1760 pieces/1000 meters, and a plurality of rail pad weighing sensors are needed to form a multi-pivot stress structure in order to realize a longer weighing area.

Dual vertical force output rail pad sensor

In order to improve the system accuracy of the current dynamic rail weigher from level 1 to level 0.5-0.2, besides the innovation, the innovation of a single-channel vertical force output rail pad sensor used for the prior rail weigher is also needed, and the novel double-vertical force output rail pad sensor is designed by optimizing the sensor process in the prior single-channel vertical force output rail pad sensor.

Dual vertical force output rail pad sensor

1) Two double vertical force output sensors with the same structure and technical parameters are designed on the elastic body of the same rail pad sensor. One path of the system can participate in two paths of simultaneous acquisition of metering data and can also be used as a standby of the system.

2) In a weighing area (or called as the length of a weighing platform) of the rail weighbridge with the same length, the double vertical force output of the sensor is equivalent to the rail pad sensors with the same number and accuracy, and the system error of the dynamic rail weighbridge is greatly reduced according to the number of the sensors and the mathematical statistics conclusion between the accuracy of the sensors and the system error of the rail weighbridge.

3) In a weighing area (or called as the length of a weighing platform) of the rail weighbridge with the same length, as the rail pad sensor is output by adopting double vertical forces, the weighing instrument is collected by two paths, which means that the collected metering data is doubled in the weighing area or the weighing platform area with the same length, and the metering data is more stable and accurate.

4) The effective metering data is doubled, so that the weighing software is more beneficial to the analysis and judgment of error records of abnormal impact pulses and the calculation of a mathematical model for the conditions of flat, out-of-round, unfilled corner, braking, acceleration, impact, vibration, rail head flanging of a weighing rail and the like of the tested wheel.

5) The steel rail of the weighing area is made to form a multi-pivot force transmission structure, and the design of increasing and decreasing the length of the weighing area 'scale body' can be realized by increasing and decreasing the double vertical force output rail pad sensor.

6) The dynamic and static railroad track scale collects main sources of weight data;

7) The sleeper has the functions of a track weighing or force measuring sensor and a sleeper for fixing the steel rail;

8) The embarrassment that the rail weighbridge with foundation pit, girder and weighing platform structure (because the rail pad type sensor structure is adopted in the past, namely the bearing platform or the four corners below the bearing girder are often provided with a sensor with a pressing structure respectively) cannot be scientifically, truly and accurately distinguished from each wheel weight of the vehicle is broken through;

9) By adopting the sensor, mechanical components such as a mechanical girder, a transition device, a transition rail, a weighing platform, a weighing body, a longitudinal limiting pull rod, a transverse limiting pull rod, a weighing sensor loading pressure head and the like and a foundation pit structure of a common dynamic rail scale can be omitted, so that additional errors caused by the components are reduced or are close to zero, and the sensor is extremely beneficial to improving the accuracy of the dynamic rail scale.

10 Influence of sensor uncertainty on track scale uncertainty)

The uncertainty of the sensor is mainly synthesized by two parts of uncertainty of a force standard machine for measuring the sensor and repeatability of independent repeated measurement. Uncertainty due to uncertainty of force standard machine and repeatability error of sensorThe uncertainty of the sensor is approximately equal to the uncertainty caused by the sensor repeatability error, since the uncertainty is much smaller. The sensor repeatability error comprises repeatability error and azimuth error, and if the sensor repeatability error is delta, the standard uncertainty of the sensor is approximate to

Relationship between rail scale uncertainty and sensor uncertainty u for multiple sensor compositions:

assuming that the uncertainty of the track scale is uG, i=1, 2.

The rail scale uncertainty introduced by the sensor is:

analysis of rail scale characteristics consisting of a plurality of sensors, assuming a weighing platform consisting of n sensors, each sensor being characterized by a linear error L, a hysteresis error H, a repeatability error R, if a weighing platform is considered to be a composite sensor

And the linear error of the weighing platform is still L, the hysteresis error is still H, and the repeatability error is as follows:

And (3) injection: the above analysis does not take into account additional errors caused by deformations of the weighing platform structure and by the force-transmitting components. (when the foundation pit-free continuous rail structure is adopted, the additional errors caused by the original mechanical girder, a transition device, a weighing platform and a weighing body structure are avoided, and the structure is more beneficial):

since the linearity errors can be corrected by the meters, the hysteresis in the rapid metering process of the dynamic railroad track scale is much smaller than the empty wheel weights, which is immediately covered by the linear wheel weights of the following vehicles. Therefore, the rail balance system formed by the combination of the multiple sensors has the main error of repeatability. Therefore, the rail weighbridge composed of a plurality of sensors can actually obtain better metering performance than the rail weighbridge composed of four sensors or a small number of sensors.

Through various technical measures, the system accuracy of the dynamic railway scale is enough to be ensured, and the technical span from level 1 to level 0.5 is improved.

Structure of double vertical force output rail pad sensor

The double vertical force output rail pad sensor figure 12 consists of an elastic body 10, a resistance strain gauge 11, an elastic strip fastener fixing screw hole 12, an elastic strip and elastic strip accessory 13, a steel rail positioning groove 14, a damping rubber pad 15, a steel rail 16 circuit and compensation plate 17, a silica gel and nitrogen gas and stainless steel sealing welding cover 18, a sensor mounting fixing hole 19, a sensor high-strength fixing bolt and accessory 20, a waterproof sealing joint 21, a double-path output shielding cable 22, a sensor mounting base 23, a pre-buried steel plate 24 of a concrete foundation and the like.

Electrical principle of dual vertical force output rail pad sensor

The dual vertical force output rail sensor resistive strain gauge arrangement as shown in fig. 13 is comprised of R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16.

Wherein: r1, R3, R5, R7, R9, R11, R13 and R15 are pull tabs;

r2, R4, R6, R8, R10, R12, R14 and R16 are tabletting.

The vertical force sensor A with independent output is formed by R1, R2, R3, R4, R5, R6, R7 and R8 and a compensation circuit through a Weston bridge circuit as shown in figure 14;

the vertical force sensor B with another independent output is formed by using a Weiston bridge circuit, wherein R9, R10, R11, R12, R13, R14, R15 and R16 and a compensation circuit are shown in figure 15.

Measuring principle of combination of a plurality of double vertical force output rail pad sensors

According to parameters such as a vehicle type, a wheel base, a bogie center distance, length changing, rail type and the like, the length of a weighing area of the rail scale is expanded by increasing and decreasing the number of double vertical force output rail pad sensors according to the interval requirement of the special technical specifications of iron.

The output signals of A paths (A1 and A2 ﹍ An) in all the double vertical force output rail pad sensors in the weighing area are transmitted into the dynamic weighing instrument in parallel (the output signals of the sensors of A1 and A2 ﹍ An which are independent can be also correspondingly connected into An input interface of the dynamic weighing instrument for amplification, filtering and analog/digital conversion). The code value or weight (the code value waveform or weight waveform is displayed by a computer) output by the dynamic weighing instrument is shown as a trapezoid output waveform in the double vertical force A paths (A1 and A2 ﹍ An) in the figure 16.

Similarly, the signals output by the B paths (B1 and B2 ﹍ Bn) of all the double vertical force output rail pad sensors in the weighing area are transmitted to the dynamic weighing instrument after being connected in parallel (the signals output by the sensors of B1 and B2 ﹍ Bn which are independent can be correspondingly connected to the input interface of the dynamic weighing instrument for amplification, filtering, analog-to-digital conversion and the like). The digital signal (code value waveform or weight waveform is displayed by a computer) output by the dynamic weighing instrument is a trapezoid output waveform synthesized by double vertical force paths B (B1 and B2 ﹍ Bn) in a figure 16.

The double vertical force output rail pad sensor plays a role in the foundation pit-free continuous rail balance, skillfully utilizes the principle of multi-fulcrum mechanics, directly transfers the wheel weight to each rail pad sensor near the lower part of the wheel through the steel rail in a dispersing way, and forms the signal output of a multi-point sensor by a plurality of double vertical force output rail pad sensors. As the wheel weight of a given load moves along the track above the trackpad sensor, the superimposed output signals in the multiple-point sensor area are constant-thus forming a weighing area which similarly forms a weighing platform as shown in fig. 17-18. Ei=E1+E2+En in the figure, wherein E1, E2 … … En are signal output values of each sensor; the length of the weighing area depends on the number of the rail pad sensors.

Measurement principle of output signal synthesis of second-class sensor

The triangular waveform of the Y-shaped track weighing detection sensor or the Y-shaped track weighing sensor B is overlapped with the trapezoidal waveform synthesized by all the double vertical force output rail pad sensors to form a rectangular waveform.

The output signals of the A path (A1 and A2 ﹍ An) in the Y-shaped track weighing detection sensing device A or the Y-shaped track weighing sensor A, Y-shaped track weighing detection sensing device B or the Y-shaped track weighing sensor B and all the double vertical force output rail pad sensors are connected in parallel and then sent into the dynamic weighing instrument to amplify, filter, analog-to-digital conversion and the like (the output signals of the independent sensors can be respectively and correspondingly connected into corresponding input interfaces of the dynamic weighing instrument to amplify, filter, analog-to-digital conversion and the like). The digital signal (code value waveform or weight waveform is displayed by a computer) output by the dynamic weighing instrument is An output P waveform formed by combining a Y-shaped track weighing detection sensing device or a Y-shaped track weighing sensor in figures 17-18 and An A path (A1 and A2 ﹍ An) in a double vertical force output track pad sensor.

Similarly, the output signals of the path B (B1, B2 ﹍ Bn) in the Y-shaped track weighing detection sensing device A or the Y-shaped track weighing sensor A, Y-shaped track weighing detection sensing device B or the Y-shaped track weighing sensor B and all the double vertical force output track pad sensors are compounded and connected in parallel and then sent into a dynamic weighing instrument to amplify, filter, analog/digital convert and the like (the output signals of the independent sensors can be correspondingly connected into an input interface of the dynamic weighing instrument to amplify, filter, analog/digital convert and the like). Digital signals (code value waveforms or weight P waveforms are displayed by a computer) output by the dynamic weighing instrument. The Y-shaped track weighing detection sensing device or the Y-shaped track weighing sensor B in the figures 17-18 and the double vertical force output track pad sensor are combined to form an output P' waveform, namely the acquired data, which is equivalent to doubling the length of a weighing area.

When the resistance of the resistance strain gauge changes along with the magnitude of the external force P, the Wheatstone bridge circuit generates a voltage output signal proportional to the magnitude of the external force:

E＝K×P。

wherein: e-sensor output voltage; p-wheel weight (or external force);

k-constant.

The wheel moves along the X axis between A and B to be a constant, and the interval of the constant is called an effective weighing area of the dynamic track scale.

The computer collects the data for analysis, comparison, judgment, calculation and synthesis P, P', thereby improving the accuracy of dynamic track weighing and further improving the reliability of the weighing.

The system of the invention

As shown in fig. 19, the Y-type track weighing detection sensor or the Y-type track weighing sensor and the dual vertical force output rail pad sensor are key to determining the dynamic and static track balance structure without foundation pit and without broken rail; the sensors are novel primary meters of the automatic rail weigher with the foundation pit-free continuous rail bogie structure, and after being provided with a channel power supply, an alternating current stabilized power supply, a UPS uninterrupted direct current power supply, a sensor debugging box, a weighing instrument, an industrial personal computer, vehicle number identification, camera shooting monitoring, metering software, management software, network communication, a printer, a weighing rail and outer rail anti-climbing device, rail fasteners, a sensor base, a sensor protection cover and other mechanical parts, a concrete embedded steel plate foundation and the like, the high-performance rail weigher is formed.

The sensor of the invention has the function of synthesis

The sensor with the shearing force function can be installed without drilling and welding on the rail web of the steel rail, and the continuous rail breaking characteristic of the dynamic rail scale is ensured.

Avoiding the disadvantages caused by the fact that the web plate of the rail web of the steel rail is drilled in a busy national railway, and the travelling crane is required to be interrupted, so that the traffic capacity is influenced.

The structure of the invention maintains the characteristics of the foundation pit-free continuous rail structure of the dynamic rail scale.

The dual vertical force output rail pad sensor is adopted, so that enough metering data can be collected under different vehicle speed conditions, and the improvement of the accuracy of the system is promoted.

The problem that the accuracy requirement of drilling holes on the web plate of the rail web of the steel rail is high, and the accuracy of a system can be directly influenced due to the fact that the 'plug-in type wheel load force sensor' with the functions of installing and replacing shearing force is high is solved;

the weighing and detecting device for the Y-shaped track or the combination of different numbers of the two types of sensors, namely the Y-shaped track weighing sensor and the double vertical force output rail pad sensor, can be conveniently designed into a metering mode of wheels, shafts, bogies and a whole vehicle of the foundation pit-free continuous rail dynamic rail balance.

The embarrassment that the rail balance structure with foundation pit and weighing platform structure can not scientifically and truly accurately distinguish the weight of the left wheel and the right wheel of the vehicle in the past is broken through;

The invention not only meets the highest and lowest metering speed of the national standard on the dynamic rail scale or the rail weighing device, but also meets the highest passing speed of the railway on the line when the invention is not metered.

The invention realizes the nondestructive installation of the rail weigher equipment and eliminates worry and anxiety of people about the application of the Y-shaped rail weighing detection sensing device or the Y-shaped rail weighing sensor in the past.

The novel combination of the invention reduces the distortion caused by increasing the gain after improving the sensitivity output coefficient of the Y-shaped track weighing detection sensing device or the Y-shaped track weighing sensor, is beneficial to improving the linearity of the synthesized waveform of the dynamic track scale, and is extremely beneficial to improving the dynamic metering performance, the accuracy, the reliability and the stability of the track scale.

The weight of the wheels (adjacent wheels) outside the weighing area is blocked from causing adjacent wheel influence on the metering area by the Y-shaped track weighing detection sensing device or the Y-shaped track weighing sensor.

Through the technical innovation of the Y-shaped track weighing detection sensor device or the Y-shaped track weighing sensor and the double vertical force output track pad sensor and the guarantee of technical measures, the system accuracy of the dynamic track scale is achieved, and the technical crossing from 1 level to 0.5 level is improved.

Other description of the invention

The metering mode of the invention

The metering mode is mainly a bogie metering mode, and can also be a wheel weight metering mode or an axle weight metering mode.

The steel rail of the invention

The steel rail can be a light rail with various specifications and types, a heavy rail with various specifications and types and a crane steel rail with various specifications and types.

The foundation of the invention

The foundation can be in the forms of a reinforced concrete embedded steel plate foundation, a reinforced concrete foundation of a special cement sleeper, a reinforced concrete foundation of a special steel sleeper, a gravel ballast bed foundation of a steel frame balance body and the like.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (10)

1. The utility model provides a no foundation ditch continuous track bogie metering structure's track scale, includes Y track weighing detection sensing device module assembly and two perpendicular force output's rail pad sensor, its characterized in that: the Y-shaped track weighing detection sensing device module assembly is permanently fixed on the rail web of the steel rail through a clamp, and the Y-shaped track weighing detection sensing device module assembly comprises: the left side and the right side of the two Y-shaped track weighing sensors are combined into a complete Y-shaped track weighing detection sensor, wherein: the device comprises a left Y-shaped track weighing sensor (4), a right Y-shaped track weighing sensor (9), a mounting base (1), an adjustable positioning rod (2), a locking buckle (3), a special clamping pressure rod (5) and a steel rail or rigid member component (5);

The rail pad sensor with double vertical force output comprises an elastic body (10), a resistance strain gauge (11), elastic strip fastener fixing screw holes (12), elastic strips, elastic strip accessories (13), steel rail locating grooves (14), damping rubber pads (15), steel rails (16), circuits and compensation plates (17), silica gel, nitrogen and stainless steel sealing welding covers (18), sensor mounting fixing holes (19), sensor high-strength fixing bolts and accessories (20), waterproof sealing joints (21), double-path output shielding cables (22), sensor mounting bases (23) and embedded steel plates (24) of a concrete foundation.

2. The track scale of a foundation pit-free continuous track bogie metering structure of claim 1, wherein: the Y-shaped track weighing detection sensing device module is clamped on a steel rail or a rigid member (7), or is directly adhered to a web plate of the steel rail or the web plate of the rigid member (7) by adopting metal glue.

3. The track scale of a foundation pit-free continuous track bogie metering structure of claim 1, wherein: the Y-shaped track weighing sensors on the left side and the right side of the rail web of the steel rail are composed of an elastomer (A), a Wheatstone bridge, a compensation circuit board (B), a waterproof sealing outlet connector (C), a shielding signal cable (D), sealant and inert gas (E) in a cavity, a flexible transition isolation area (F), a three-grab (G) and a resistance strain gauge (H) which are arranged and adhered to the inner side of a cavity web of a stress control area, the cavity web (I) of the stress control area, an anti-slip damping contact surface (J), and a fixing and moment applying positioning hole (K) of the Y-shaped track weighing sensor.

4. A track scale for a foundation pit-free continuous track bogie metering structure according to claim 3, wherein: r1 and R2 in the Wheatstone bridge and the compensation circuit board (B) are pull-to resistance strain gauges; r3 and R4 are pressed resistance strain gauges; rct/2 is the elastic modulus compensation resistor; r0 is output resistance standardized compensation resistance; rz is zero output compensation resistor; rs is sensitivity coefficient compensation resistance; ri, input resistance standardized compensation resistance; RL is a nonlinear compensation resistor; rmt sensitivity temperature compensation resistor; rt is zero temperature compensation resistor; rp is a linear compensation resistor for sensitivity temperature compensation; "U+" is the positive pole of bridge supply; "U-" is the negative pole of the bridge supply; "E+" is the signal output positive electrode; "E-" is the negative electrode of signal output.

5. The track scale of the foundation pit-free continuous track bogie metering structure of claim 4, wherein: when P >0, the resistance strain gauges R1, R3 are in tensile stress when the steel rail or the rigid member (7) is deformed, and the resistance strain gauges R2, R4 are in compression stress when the steel rail or the rigid member (7) is deformed.

6. The track scale of the foundation pit-free continuous track bogie metering structure of claim 5, wherein: the resistance strain gauges R1, R2, R3 and R4 on the left and right Y-shaped track weighing sensor elastic bodies are synthesized into a complete Y-shaped track weighing detection sensor through a Wheatstone bridge circuit and a compensation circuit board.

7. A track scale for a non-pit continuous track bogie metering structure according to any one of claims 1 to 6, wherein: the Y-shaped track weighing detection sensing device outputs a triangular waveform, and the double-vertical force output track pad sensor outputs a trapezoidal waveform.

8. The track scale of a foundation pit-free continuous track bogie metering structure of claim 7, wherein: the triangular waveform characteristics output by the Y-shaped track weighing detection sensing device are overlapped and complemented with the trapezoidal waveform output by the double-vertical-force output track pad sensor, so that a rectangular waveform which is suitable for dynamic track scales is formed.

9. The track scale of a foundation pit-free continuous track bogie metering structure of claim 1, wherein: the resistance strain gauge (11) of the dual vertical force output rail pad sensor consists of a pair of pull tabs and a pressing sheet;

wherein the method comprises the steps of

R1, R3, R5, R7, R9, R11, R13 and R15 are pull tabs;

r2, R4, R6, R8, R10, R12, R14 and R16 are tabletting.

10. The track scale of a foundation pit-free continuous track bogie metering structure of claim 9, wherein: r1, R2, R3, R4, R5, R6, R7 and R8 and a compensation circuit form an independent output vertical force sensor A through a Weston bridge circuit;

R9, R10, R11, R12, R13, R14, R15 and R16 and the compensation circuit form another independent output vertical force sensor B through a Weston bridge circuit.