阅读说明：本技术 一种轮轨应力测量接线器及测量装置 (Wheel rail stress measurement wire connector and measuring device ) 是由 程曜彦 于 2019-09-16 设计创作，主要内容包括：本发明提供一种轮轨应力测量接线器,包括：连接电路板,具有电桥搭建电路；四个信号输入部,每个信号输入部均具有四个信号输入端子；信号输出部,具有四个信号输出端子；其中,信号输出端子用于分别通过信号输出导线与应变仪相连接,信号输入端子用于分别通过信号输入导线与对应的应变片相连接,从而使得应变片两两串联形成惠斯通电桥电路,进而通过惠斯通电桥电路将应变信号传送至应变仪。本发明还提供一种轮轨应力测量装置,用于对钢轨的轮轨应力进行测量,包括应变片、应变仪以及上述轮轨应力测量接线器。该测量装置操作简单、测量速度快、测量结果精度高,且无需考虑应变片连接原理,可以避免接线出错。(The invention provides a wheel rail stress measurement wire connector, comprising: a connection circuit board having a bridge building circuit; four signal input sections each having four signal input terminals; a signal output section having four signal output terminals; the signal output terminals are used for being connected with the strain gauges through signal output wires respectively, and the signal input terminals are used for being connected with corresponding strain gauges through signal input wires respectively, so that the strain gauges are connected in series in pairs to form a Wheatstone bridge circuit, and strain signals are transmitted to the strain gauges through the Wheatstone bridge circuit. The invention also provides a wheel-rail stress measuring device which is used for measuring the wheel-rail stress of the steel rail and comprises a strain gauge, a strain gauge and the wheel-rail stress measuring connector. The measuring device is simple to operate, high in measuring speed and high in measuring result precision, and can avoid wiring errors without considering a strain gauge connection principle.)

1. A wheel rail stress measurement connector for connecting a strain gauge and a strain gauge arranged on a steel rail in a predetermined manner, so that the strain gauge measures wheel rail stress of the steel rail according to a strain signal of the strain gauge, comprising:

the connecting circuit board is provided with a bridge building circuit, and the bridge building circuit is provided with sixteen bridge access ends and four bridge output ends;

each signal input part is provided with four signal input terminals which are respectively arranged on the corresponding bridge access ends and correspondingly connected with the bridge access ends;

the signal output part is provided with four signal output terminals which are respectively arranged on the corresponding bridge output ends and are correspondingly connected with the bridge output ends;

wherein the signal output terminals are respectively connected with the instrument input terminals of the strain gauge through signal output leads,

the signal input terminals are used for being connected with the corresponding strain terminals at two ends of the strain gauge respectively through signal input wires, so that the strain gauges are connected in series in pairs to form a Wheatstone bridge arm, and strain signals are transmitted to the strain gauge through a Wheatstone bridge circuit.

2. The wheel track stress-measuring wire connector of claim 1, wherein:

wherein the output ends of the bridge are respectively an output end A of the bridge, an output end B of the bridge, an output end C of the bridge and an output end D of the bridge,

the strain gauges are respectively strain gauge a1, strain gauge a2, strain gauge a3, strain gauge a4, strain gauge a5, strain gauge a6, strain gauge a7 and strain gauge a8,

the signal input terminals corresponding to the signal input parts are respectively a signal input terminal a11, a signal input terminal a12, a signal input terminal a21, a signal input terminal a22, a signal input terminal a31, a signal input terminal a32, a signal input terminal a41, a signal input terminal 42, a signal input terminal a51, a signal input terminal a52, a signal input terminal a61, a signal input terminal a62, a signal input terminal a71, a signal input terminal a72, a signal input terminal a81 and a signal input terminal a82,

the signal input terminal a11 and the signal input terminal a12 are respectively connected with the strain terminals at two ends of the strain gauge a1,

the signal input terminal a21 and the signal input terminal a22 are respectively connected with the strain terminals at two ends of the strain gauge a2,

the signal input terminal a31 and the signal input terminal a32 are respectively connected with the strain terminals at two ends of the strain gauge a3,

the signal input terminal a41 and the signal input terminal a42 are respectively connected with the strain terminals at two ends of the strain gauge a4,

the signal input terminal a51 and the signal input terminal a52 are respectively connected with the strain terminals at two ends of the strain gauge a5,

the signal input terminal a61 and the signal input terminal a62 are respectively connected with the strain terminals at two ends of the strain gauge a6,

the signal input terminal a71 and the signal input terminal a72 are respectively connected with the strain terminals at two ends of the strain gauge a7,

the signal input terminal a81 and the signal input terminal a82 are connected to the strain terminals at both ends of the strain gauge a8, respectively.

3. The wheel track stress-measuring wire connector of claim 2, wherein:

wherein the bridge building circuit is a vertical force bridge building circuit,

the bridge access ends of the vertical force bridge building circuit are respectively a bridge access end A1a, a bridge access end A1b, a bridge access end A2a, a bridge access end A2b, a bridge access end A3a, a bridge access end A3b, a bridge access end A4a, a bridge access end A4b, a bridge access end A5a, a bridge access end A5b, a bridge access end A6a, a bridge access end A6b, a bridge access end A7a, a bridge access end A7b, a bridge access end A8a and a bridge access end A8b,

the bridge input end A1a is connected to the bridge input end A2a and the bridge output end D,

the bridge access A1b is connected to the bridge access A3a,

the bridge access A2b is connected to the bridge access A4a,

the bridge input end A3b is connected to the bridge input end A8b and the bridge output end A,

the bridge input terminal A4b is connected to the bridge input terminal A7b and the bridge output terminal C,

the bridge input terminal A5a is connected to the bridge input terminal A6a and the bridge output terminal B,

the bridge access A5b is connected to the bridge access A7a,

the bridge access A6b is connected to the bridge access A8 a.

4. The wheel track stress-measuring wire connector of claim 2, wherein:

wherein the bridge building circuit is a transverse force bridge building circuit,

the bridge access ends of the transverse force bridge building circuit are respectively a bridge access end B1a, a bridge access end B1B, a bridge access end B2a, a bridge access end B2B, a bridge access end B3a, a bridge access end B3B, a bridge access end B4a, a bridge access end B4B, a bridge access end B5a, a bridge access end B5B, a bridge access end B6a, a bridge access end B6B, a bridge access end B7a, a bridge access end B7B, a bridge access end B8a and a bridge access end B8B,

the bridge input terminal B1a is connected to the bridge input terminal B5a and the bridge output terminal D,

the bridge access B1B is connected to the bridge access B3a,

the bridge input terminal B2a is connected to the bridge input terminal B6a and the bridge output terminal B,

the bridge access B2B is connected to the bridge access B4a,

the bridge input terminal B3B is connected to the bridge input terminal B4B and the bridge output terminal C,

the bridge access B5B is connected to the bridge access B7a,

the bridge access B6B is connected to the bridge access B8a,

the bridge input terminal B7B is connected to the bridge input terminal B8B and the bridge output terminal a.

5. The wheel track stress-measuring wire connector of claim 1, wherein:

the signal input part and the signal output part are both arranged on the surface of the resin sealing layer.

6. The wheel track stress-measuring wire connector of claim 5, wherein:

wherein, the surface of the resin sealing layer is provided with twenty open pores for respectively accommodating the bridge input end and the bridge output end,

and the top ends of the bridge access end and the bridge output end are provided with conducting strips.

7. The wheel track stress-measuring wire connector of claim 6, wherein:

wherein the bottom surfaces of the signal input part and the signal output part are respectively provided with four through holes which are penetrated through, and the through holes are in one-to-one correspondence with the conducting strips,

the top of the through hole is provided with internal threads, and screwing screws are inserted into the through hole,

the signal input portion with the side of signal output portion all is provided with four wiring holes, just wiring hole respectively with correspond the through-hole switches on.

8. The wheel track stress-measuring wire connector of claim 6, wherein:

wherein, the conducting strip is an elastic conducting strip.

9. The wheel track stress-measuring wire connector of claim 7, wherein:

wherein, the outer part of the resin sealing layer is provided with a bottom shell, the top of the bottom shell is provided with a box cover matched with the bottom shell,

the side bottom of lid is equipped with twenty bar openings, just the bar opening with wiring hole one-to-one.

10. A wheel rail stress measuring device for measuring wheel rail stress of a steel rail, comprising:

the strain gauge is arranged on the steel rail according to a preset mode and used for acquiring a strain signal of the steel rail;

the strain gauge is used for receiving the strain signal and recording the strain signal so as to analyze and obtain the wheel-rail vertical force and the wheel-rail transverse force of the steel rail; and

the wheel-rail stress measuring wire connector is provided with a wheel-rail stress measuring wire connector,

wherein the wheel track stress-measuring wire connector is as claimed in any one of claims 1 to 9.

Technical Field

The invention belongs to the technical field of rail vehicle dynamics detection, relates to a wheel rail stress measuring device, and particularly relates to a wheel rail stress measuring wire connector and a measuring device.

Background

With the increasing speed and axle weight of trains, the safety situation of railway transportation becomes more severe, and for the safety of railway transportation, the wheel-rail relationship has become an important content of railway design, maintenance and management. The wheel-rail stress is an important index for judging the operation safety performance of the train, the wheel-rail stress comprises a wheel-rail vertical force and a wheel-rail transverse force, and the accurate real-time measurement of the wheel-rail vertical force and the wheel-rail transverse force is a key for judging whether the train is safe to operate. In the wheel-rail stress measuring method, the ground wheel-rail stress measurement is one of more accurate and low-cost methods, and the wheel-rail stress state during the running of a train can be recorded and analyzed by combining a strain gauge patch and a bridge circuit and then connecting the strain gauge patch and the bridge circuit to a test system, so that whether the potential safety hazard occurs on a track line or not can be analyzed and judged.

The industrial standard TB/T2489-2016 wheel rail transverse force and vertical force ground test method mainly utilizes four groups of 90-degree strain rosettes adhered to the surface of a steel rail to perform bridge measurement by the Wheatstone bridge principle, wherein 8 strain gages are required to be measured by 4 groups of strain rosettes for testing one wheel rail force, and after 16 signal input wires are connected to form a bridge, the bridge is connected to a strain gauge by 4 signal output wires to perform measurement.

However, in actual measurement, a wheatstone bridge needs to be built on the site by a tester, the requirement on the tester is high, the consumed time is long, meanwhile, the measurement site is usually in the field, and is influenced by the external environment and more wiring, a wrong line is easily connected, the precision of a measurement result is influenced, and further the safety of train operation is influenced.

Disclosure of Invention

In order to solve the problems, the invention provides the wheel track stress measurement wire connector which is simple to operate, high in measurement speed and high in measurement result precision, and does not need to consider the strain gauge connection principle, and the invention adopts the following technical scheme:

the invention provides a wheel rail stress measuring connector, which is used for connecting a strain gauge and a strain gauge arranged on a steel rail in a preset mode so as to measure the wheel rail stress of the steel rail according to a strain signal of the strain gauge, and is characterized by comprising the following components: the connecting circuit board is provided with a bridge building circuit, and the bridge building circuit is provided with sixteen bridge access ends and four bridge output ends; the four signal input parts are respectively provided with four signal input terminals which are respectively arranged on the corresponding bridge access ends and correspondingly connected with the bridge access ends; the signal output part is provided with four signal output terminals which are respectively arranged on the corresponding bridge output ends and are correspondingly connected with the bridge output ends; the signal output terminals are respectively connected with instrument input terminals of the strain gauges through signal output wires, and the signal input terminals are respectively connected with strain terminals at two ends of corresponding strain gauges through signal input wires, so that the strain gauges are connected in series in pairs to form a Wheatstone bridge arm, and strain signals are transmitted to the strain gauges through Wheatstone bridge circuits.

The wheel track stress measuring wire connector provided by the invention can also have the technical characteristics that the bridge output ends are respectively a bridge output end A, a bridge output end B, a bridge output end C and a bridge output end D, the strain gauges are respectively a strain gauge a1, a strain gauge a2, a strain gauge a3, a strain gauge a4, a strain gauge a5, a strain gauge a6, a strain gauge a7 and a strain gauge a8, the signal input terminals corresponding to the signal input part are respectively a signal input terminal a11, a signal input terminal a12, a signal input terminal a21, a signal input terminal a22, a signal input terminal a31, a signal input terminal a32, a signal input terminal a41, a signal input terminal 42, a signal input terminal a51, a signal input terminal a52, a signal input terminal a61, a signal input terminal a62, a signal input terminal a71, a signal input terminal a72, a signal input terminal a81 and a signal input terminal a82, the signal input terminal a11 and the signal input terminal a12 are respectively connected to strain terminals at both ends of a strain gauge a1, the signal input terminal a21 and the signal input terminal a22 are respectively connected to strain terminals at both ends of a strain gauge a2, the signal input terminal a31 and the signal input terminal a32 are respectively connected to strain terminals at both ends of a strain gauge 3, the signal input terminal a41 and the signal input terminal a42 are respectively connected to strain terminals at both ends of a strain gauge a4, and the signal input terminal a51, the signal input terminal a52 corresponds to the strain terminals at both ends of the strain gauge a5, the signal input terminal a61 and the signal input terminal a62 correspond to the strain terminals at both ends of the strain gauge a6, the signal input terminal a71 and the signal input terminal a72 correspond to the strain terminals at both ends of the strain gauge a7, and the signal input terminal a81 and the signal input terminal a82 correspond to the strain terminals at both ends of the strain gauge a 8.

The wheel rail stress measurement wire connector provided by the invention can also have the technical characteristics that the bridge building circuit is a vertical force bridge building circuit, the bridge access ends of the vertical force bridge building circuit are respectively a bridge access end A1a, a bridge access end A1b, a bridge access end A2a, a bridge access end A2b, a bridge access end A3a, a bridge access end A3b, a bridge access end A4a, a bridge access end A4b, a bridge access end A5a, a bridge access end A5b, a bridge access end A6a, a bridge access end A6b, a bridge access end A7a, a bridge access end A7b, a bridge access end A8a and a bridge access end A8b, a bridge access end A1a is connected with a bridge access end A2a and a bridge output end D, a bridge access end A1b is connected with A3 access end A a, A2 access end A2 is connected with a bridge access end A56, a bridge access end A828653 is connected with a bridge access end A8653 and a bridge output end 828653, the bridge access end A4B is connected to the bridge access end A7B and the bridge output end C, the bridge access end A5a is connected to the bridge access end A6a and the bridge output end B, the bridge access end A5B is connected to the bridge access end A7a, and the bridge access end A6B is connected to the bridge access end A8 a.

The wheel rail stress measuring wire connector provided by the invention can also have the technical characteristics that the bridge building circuit is a transverse force bridge building circuit, the bridge access ends of the transverse force bridge building circuit are respectively a bridge access end B1a, a bridge access end B1B, a bridge access end B2a, a bridge access end B2B, a bridge access end B3a, a bridge access end B3B, a bridge access end B4a, a bridge access end B4B, a bridge access end B5a, a bridge access end B5B, a bridge access end B6a, a bridge access end B6B, a bridge access end B7a, a bridge access end B7B, a bridge access end B8a and a bridge access end B8B, the bridge access end B1a is connected with a bridge access end B5a and a bridge output end D, the bridge access end B1B is connected with a bridge access end B3a, the bridge access end B2 is connected with a bridge access end B2B 8656, a bridge access end B2B 8653 and a bridge access end 8653, the bridge access end B3B is connected to the bridge access end B4B and the bridge output end C, the bridge access end B5B is connected to the bridge access end B7a, the bridge access end B6B is connected to the bridge access end B8a, and the bridge access end B7B is connected to the bridge access end B8B and the bridge output end a.

The wheel track stress measuring wire connector provided by the invention can also have the technical characteristics that the outer part of the connecting circuit board is wrapped by the resin sealing layer, and the signal input part and the signal output part are both arranged on the surface of the resin sealing layer.

The wheel track stress measuring wire connector provided by the invention can also have the technical characteristics that twenty open holes are formed in the surface of the resin sealing layer and are respectively used for accommodating the bridge connecting end and the bridge output end, and conducting strips are arranged at the top ends of the bridge connecting end and the bridge output end.

The wheel track stress measurement wire connector provided by the invention also has the technical characteristics that the bottom surfaces of the signal input part and the signal output part are respectively provided with four through holes which penetrate through the bottom surfaces, the through holes correspond to the conducting strips one by one, the top parts of the through holes are respectively provided with internal threads, screwing screws are inserted into the through holes, the side surfaces of the signal input part and the signal output part are respectively provided with four wire connecting holes, and the wire connecting holes are respectively communicated with the corresponding through holes.

The wheel track stress measuring wire connector provided by the invention can also have the technical characteristics that the conducting strips are elastic conducting strips.

The wheel track stress measurement wire connector provided by the invention can also have the technical characteristics that a bottom shell is arranged outside the resin sealing layer, a box cover matched with the bottom shell is arranged at the top of the bottom shell, twenty strip-shaped openings are arranged at the bottom of the side surface of the box cover, and the strip-shaped openings correspond to the wire connecting holes one by one.

The invention also provides a wheel rail stress measuring device, which is used for measuring the wheel rail stress of the steel rail and is characterized by comprising the following components: the strain gauge is arranged on the steel rail according to a preset mode and used for acquiring a strain signal of the wheel rail; the strain gauge is used for receiving the strain signal and recording the strain signal so as to analyze and obtain the wheel-rail vertical force and the wheel-rail transverse force of the steel rail; and a wheel track stress-measuring wire connector, wherein the wheel track stress-measuring wire connector is the wheel track stress-measuring wire connector of any one of claims 1-9.

Action and Effect of the invention

According to the wheel rail stress measuring wire connector provided by the invention, the connecting circuit board is provided with a bridge building circuit which is provided with sixteen bridge access ends and four bridge output ends, each signal input part is provided with four signal input terminals, the signal input terminals are respectively arranged on the corresponding bridge access ends and correspondingly connected with the bridge access ends, the signal output part is provided with four signal output terminals, the signal output terminals are respectively arranged on the corresponding bridge output ends and correspondingly connected with the bridge output ends, the signal output terminals are respectively connected with instrument input terminals of a strain gauge through signal output leads, the signal input terminals are respectively connected with strain terminals at two ends of the corresponding strain gauge through the signal input leads, so that the strain gauges can be connected in series two by two to form a Wheatstone bridge arm circuit, and then convey the strain signal to the strain gauge through the bridge arm circuit of Wheatstone bridge, therefore, when measuring wheel rail stress, need not to consider the connection principle of foil gage, only need to insert the signal input wire that is connected with the foil gage into the signal input terminal that corresponds, insert the signal output wire that is connected with the foil gage into the signal output terminal that corresponds and can accomplish the construction of Wheatstone bridge, it is not high to measurement personnel's professional knowledge requirement, and can save a large amount of wiring time, can avoid receiving external environment and the more influence of wiring, avoid the wiring mistake, thereby improve measuring result's precision, and then guarantee the safety of train operation.

Drawings

Fig. 1 is a schematic connection structure diagram of a wheel-rail stress measuring device according to an embodiment of the invention;

FIG. 2 is a schematic diagram of a strain gage for measuring vertical force of a wheel rail in an industry standard;

FIG. 3 is a schematic diagram of a vertical force bridge circuit configuration of a wheel track stress measuring wire connector in accordance with an embodiment of the present invention;

FIG. 4 is a cross-sectional structural schematic view of a wheel track stress measuring wire connector of an embodiment of the present invention;

FIG. 5 is a schematic cross-sectional view of a signal input portion of a wheel track stress measuring wire connector according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of the front structure of the signal output part of the wheel track stress measuring wire connector according to the embodiment of the invention;

FIG. 7 is a schematic diagram of a back structure of a signal output portion of the wheel track stress measuring connector according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a front structure of a cover of the wheel track stress measuring connector according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of a structure of the back side of the cover of the wheel track stress measuring connector according to an embodiment of the present invention;

FIG. 10 is a schematic diagram of a Wheatstone bridge circuit for measuring vertical force of the wheel rail stress measuring apparatus according to the embodiment of the invention;

FIG. 11 is a schematic diagram of a strain gage patch in an industry standard for measuring transverse force of a wheel track;

FIG. 12 is a schematic diagram of a transverse force bridge configuration circuit connection for a wheel track stress measuring wire connector in accordance with an embodiment of the present invention;

fig. 13 is a schematic circuit diagram of a wheatstone bridge circuit for measuring a transverse force of a wheel rail of the wheel rail stress measuring apparatus according to the embodiment of the present invention.

Detailed Description

The conception, the specific structure and the technical effects of the present invention will be further described with reference to the accompanying drawings to fully understand the objects, the features and the effects of the present invention.

< example one >

Fig. 1 is a schematic connection structure diagram of a wheel-rail stress measuring device according to an embodiment of the present invention.

As shown in FIG. 1, the invention provides a wheel rail stress measuring device 1 for measuring the wheel rail vertical force of a steel rail, which comprises a strain gauge 10, a strain gauge 20 and a wheel rail stress measuring connector 30.

FIG. 2 is a schematic diagram of a strain gage patch in an industry standard for measuring vertical force on a wheel rail.

As shown in fig. 2, the strain gauge 10 is disposed on the rail in a predetermined manner for acquiring a strain signal of the rail.

The specific installation mode of the strain gauge 10 is installed according to the installation mode in the wheel rail transverse force and vertical force ground test method of the industry standard TB/T2489-2016, when the wheel rail vertical force is measured, the strain gauge 10 (A1, A2, A3, A4, A5, A6, A7 and A8 in the attached drawing 2) is attached to the two sides of the steel rail and the shaft of the left-right symmetrical section of the center line between the supporting points of the steel rail, and the direction of the strain gauge 10 forms an angle of 45 degrees with the longitudinal direction of the steel rail.

The strain gauge 20 is used for receiving the strain signal and recording the strain signal, so as to analyze and obtain the wheel-rail vertical force of the steel rail.

The wheel track stress measuring connector 30 is used for connecting the strain gauge 20 and the strain gauge 10 arranged on the steel rail in a preset mode, so that the strain gauge 20 measures the wheel track vertical force of the steel rail according to the strain signal of the strain gauge 10, and the wheel track stress measuring connector 30 comprises a connecting circuit board 301, four signal input parts 302 and a signal output part 303.

The connection circuit board 301 has a bridge construction circuit, which is provided with sixteen bridge input ends 3011 and four bridge output ends 3012, where the bridge output ends 3012 are a bridge output end a, a bridge output end B, a bridge output end C, and a bridge output end D, respectively.

FIG. 3 is a schematic diagram of a vertical force bridge circuit for a wheel track stress measuring wire connector according to an embodiment of the present invention.

As shown in fig. 3, the bridge building circuit may be a vertical power bridge building circuit, the bridge access terminals of the vertical power bridge building circuit are a bridge access terminal A1a, a bridge access terminal A1b, a bridge access terminal A2a, a bridge access terminal A2b, a bridge access terminal A3a, a bridge access terminal A3b, a bridge access terminal A4a, a bridge access terminal A4b, a bridge access terminal A5a, a bridge access terminal A5b, a bridge access terminal A6a, a bridge access terminal A6b, a bridge access terminal A7a, a bridge access terminal A7b, a bridge access terminal A8a and a bridge access terminal A8b, the bridge access terminal A1a is connected with the bridge access terminal A2a and the bridge output terminal D, the bridge access terminal A1b is connected with A3a, the bridge access terminal A2b is connected with the bridge access terminal A4a, the bridge access terminal A3 is connected with the bridge access terminal a72, the bridge access terminal a a, and the bridge output terminal a a a, the bridge access end A5a is connected to the bridge access end A6a and the bridge output end B, the bridge access end A5B is connected to the bridge access end A7a, and the bridge access end A6B is connected to the bridge access end A8 a.

Each of the signal input units 302 has four signal input terminals 3021, and the signal input terminals 3021 are provided at the corresponding bridge input terminals 3011 and are connected to the corresponding bridge input terminals 3011.

The signal output unit 303 has four signal output terminals 3031, and the signal output terminals 3031 are provided at the corresponding bridge output terminals 3012, respectively, and are connected to the corresponding bridge output terminals 3012.

The signal output terminals 3031 are respectively connected with the instrument input terminals of the strain gauge 20 through signal output wires, and the signal input terminals 3021 are respectively connected with the strain terminals at two ends of the corresponding strain gauge 10 through signal input wires, so that the strain gauges 10 can be connected in series two by two to form a wheatstone bridge arm, thereby forming a wheatstone bridge circuit, and further, the strain signals are transmitted to the strain gauge 20 through the wheatstone bridge circuit.

In the present embodiment, the strain gauges 10 are strain gauge a1, strain gauge a2, strain gauge a3, strain gauge a4, strain gauge a5, strain gauge a6, strain gauge a7 and strain gauge a8, the signal input terminals 3021 corresponding to the signal input unit 302 are signal input terminals a11, signal input terminals a12, signal input terminals a21, signal input terminals a22, signal input terminals a31, signal input terminals 42, signal input terminals a31 and signal input terminals a31, the signal input terminals a31 and the signal input terminals a31 are respectively connected to the strain terminals at both ends of the strain gauge a31, the signal input terminals a31 and the strain input terminals a31 a are respectively connected to both ends of the strain gauges a31, the signal input terminal a31 and the signal input terminal a32 are connected to strain terminals at both ends of a strain gauge a3, respectively, the signal input terminal a41 and the signal input terminal a42 are connected to strain terminals at both ends of a strain gauge a4, respectively, the signal input terminal a51 and the signal input terminal a52 are connected to strain terminals at both ends of a strain gauge a5, the signal input terminal a61 and the signal input terminal a62 are connected to strain terminals at both ends of a strain gauge a6, respectively, the signal input terminal a71 and the signal input terminal a72 are connected to strain terminals at both ends of a strain gauge 7, respectively, and the signal input terminal a81 and the signal input terminal a82 are connected to strain terminals at both ends of a strain gauge 8, respectively.

FIG. 4 is a schematic diagram of the overall cross-sectional configuration of a wheel track stress measuring wire connector of an embodiment of the present invention; FIG. 5 is a schematic cross-sectional view of a signal input portion of a wheel track stress measuring wire connector according to an embodiment of the present invention; FIG. 6 is a schematic diagram of the front structure of the signal output part of the wheel track stress measuring wire connector according to the embodiment of the invention; FIG. 7 is a schematic diagram of a back structure of a signal output portion of the wheel track stress measuring connector according to an embodiment of the present invention; FIG. 8 is a schematic diagram of a front structure of a cover of the wheel track stress measuring connector according to an embodiment of the present invention; fig. 9 is a schematic structural diagram of the back of the box cover of the wheel track stress measuring connector according to the embodiment of the invention.

As shown in fig. 4 to 9, in the present embodiment, the exterior of the connection circuit board 301 is wrapped with a resin sealing layer 3013, and the signal input portion 302 and the signal output portion 303 are mounted on the surface of the resin sealing layer 3013.

Twenty openings 3014 are formed in the surface of the resin sealing layer 3013 and are used for accommodating the bridge incoming end 3011 and the bridge output end 3012, conductive sheets 3015 are mounted at the top ends of the bridge incoming end 3011 and the bridge output end 3012, and the conductive sheets 3015 are elastic conductive sheets.

The bottom surfaces of the signal input part 302 and the signal output part 303 are provided with four through holes 304 which penetrate through the through holes, the through holes 304 correspond to the conducting strips 3015 one by one, the top parts of the through holes 304 are provided with internal threads, screwing screws 305 are inserted into the through holes 304, the side surfaces of the signal input part 302 and the signal output part 303 are provided with four wiring holes 306, and the wiring holes 306 are respectively communicated with the corresponding through holes 304, so that a signal input lead connected with the strain gauge 10 and a signal output lead connected with the strain gauge 20 can be respectively connected with a circuit through the signal input part 302 and the signal output part 303 and a bridge.

A bottom shell 3016 is arranged outside the resin sealing layer 3013, a box cover 3017 matched with the bottom shell 3016 is arranged on the top of the bottom shell 3016, twenty strip-shaped openings 3018 are arranged at the bottom of the side face of the box cover 3017, and the strip-shaped openings 3018 correspond to the wiring holes 306 one by one, so that the bottom shell 3016 and the box cover 3017 can seal the wheel-rail stress measuring wire connector 30, and the wiring of the signal input lead, the signal output lead and the wheel-rail stress measuring wire connector 30 is not affected.

Fig. 10 is a schematic diagram of a wheatstone bridge for measuring wheel rail stress of the wheel rail stress measuring apparatus according to the embodiment of the present invention.

As shown in fig. 10, when measuring the wheel rail vertical force, first, the strain gauge 10 is mounted on the steel rail in a predetermined manner, then the signal input leads at both ends of the strain gauge 10 are correspondingly connected to the signal input terminals 3021 in the signal input unit 302, and the signal output leads of the strain gauge 20 are correspondingly connected to the signal output terminals 3031 in the signal output unit 303, so that the strain gauge 10 (strain gauge a1, strain gauge a2, strain gauge A3, strain gauge a4, strain gauge a5, strain gauge A6, strain gauge a7, and strain gauge A8, that is, a1, a2, A3, a4, a5, A6, a7, and A8 in fig. 10) can be connected in series to form a wheatstone bridge arm in pairs to realize the transmission of the strain signal, and further realize the measurement of the wheel rail vertical force.

< example two >

In this embodiment, the same structures, methods, and conditions as those in the first embodiment are given the same reference numerals, and the same descriptions are omitted.