CN218577727U - Digital sensor of high-speed rail brake system - Google Patents
Digital sensor of high-speed rail brake system Download PDFInfo
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- CN218577727U CN218577727U CN202222975084.3U CN202222975084U CN218577727U CN 218577727 U CN218577727 U CN 218577727U CN 202222975084 U CN202222975084 U CN 202222975084U CN 218577727 U CN218577727 U CN 218577727U
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- flexible pcb
- strain
- brake system
- circuit board
- digital amplifier
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Abstract
The utility model discloses a digital sensor of a high-speed rail brake system, which comprises an elastic body, 8 strain units, a flexible PCB circuit board, 2 cable assemblies and a digital amplifier, wherein the elastic body is of a hollow cylindrical structure, and the upper end surface of the elastic body is provided with an annular groove; 8 strain units constitute 2 Wheatstone measuring circuit, and strain unit, flexible PCB circuit board, digital amplifier pass through the silica gel encapsulation and set up in the annular groove, and 2 Wheatstone measuring circuit's output is connected with the input electricity of flexible PCB circuit board, and the output of flexible PCB circuit board is connected with digital amplifier's input electricity. The utility model is used for integrated brake actuator goes up in order to measure the applied brake force, through 2 mutually independent Wheatstone measuring circuit, realizes independent dual output, and two way output signal are the same, both can real-time supervision feedback brake system in the applied brake force, can realize monitoring each other again.
Description
Technical Field
The utility model belongs to the technical field of the sensor, concretely relates to high-speed railway braking system's digital sensor.
Background
At present, the traditional pneumatic brake is generally replaced by an electronic mechanical brake system, and the defects of a hydraulic system in the aspects of complicated structure, high installation difficulty, high maintenance cost and the like can be overcome, so that the development of the industry is promoted. The braking system is critical to the safety of the railway vehicle.
The pressure and the joint pressure of a brake cylinder are respectively measured by two groups of pressure sensors in a traditional pneumatic braking system, the pressure sensors are accurate electronic measurement components, the requirement on the environment is very high, and the high temperature and the low temperature can influence the acquisition precision, the acquisition efficiency and the service life of the pressure sensors. The existing electromechanical brake system is not provided with the sensor for monitoring the stress condition of the brake system, and the stress condition of the brake system cannot be monitored.
Therefore, in order to control and monitor the electric motor and the whole brake system, an accurate digital sensor with an independent dual-output high-speed rail brake system is needed to be provided.
SUMMERY OF THE UTILITY MODEL
For solving the defect that prior art exists, the utility model provides a high-speed railway braking system's digital sensor.
In order to solve the technical problem, the utility model provides a following technical scheme:
the utility model provides a digital sensor of a high-speed rail brake system, which comprises an elastic body, 8 strain units, a flexible PCB (printed circuit board), 2 cable assemblies and a digital amplifier, wherein the elastic body is of a hollow cylindrical structure, and an annular groove is arranged on the upper end face of the elastic body; 8 strain units can constitute 2 wheatstone measuring circuit, strain unit, flexible PCB circuit board, digital amplifier pass through the silica gel encapsulation and set up in the annular groove, and 2 wheatstone measuring circuit's output is connected with the input electricity of flexible PCB circuit board, the output of flexible PCB circuit board is connected with digital amplifier's input electricity, digital amplifier's output is connected with cable assembly's input electricity.
Preferably, each strain unit includes a substrate, a first strain gauge and a second strain gauge, the first strain gauge and the second strain gauge are disposed on the substrate, and 8 first strain gauges and 8 second strain gauges respectively constitute 2 wheatstone measurement circuits.
Preferably, the flexible PCB circuit board is of a circular sheet structure, the flexible PCB circuit board is provided with 4 first rectangular positioning holes and 4 second positioning holes, the inner long side of the 4 first rectangular positioning holes is of an opening structure, and the outer long side of the 4 first rectangular positioning holes is circumscribed on the same circle which is coaxial with the flexible PCB circuit board; the 4 first rectangular positioning holes and the 4 second positioning holes are uniformly arranged in the circumferential direction of the flexible PCB at intervals, the inner long side and the outer long side of the 4 second positioning holes are externally tangent to the same circle which is coaxial with the flexible PCB, and the outer long side of each second positioning hole is radially positioned on the outer side of the outer long side of each first rectangular positioning hole on the flexible PCB.
Preferably, the strain unit 2 is attached to the bottom wall of the annular groove and located in the first rectangular positioning hole to form a positive strain unit, and the strain unit 2 is attached to the bottom wall of the annular groove and located in the second positioning hole to form a negative strain unit.
Preferably, the digital amplifier is of a fan-ring sheet structure, the digital amplifier is positioned above the flexible PCB, and a separation mechanism is arranged between the digital amplifier and the flexible PCB.
Preferably, the separation mechanism is a silica gel layer, and the silica gel layer is arranged between the digital amplifier and the flexible PCB.
Preferably, the separation mechanism is a positioning column, and the positioning column is arranged on the wall of the annular groove.
The utility model discloses compare in prior art, have following beneficial effect:
the utility model is used for integrated brake actuator goes up in order to measure the applied brake force, through 2 mutually independent Wheatstone measuring circuit, realizes independent dual output, and two way output signal are the same, both can real-time supervision feedback brake system in the applied brake force, can realize monitoring each other again.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a digital sensor of a high-speed rail brake system according to the present invention;
fig. 2 is a schematic wiring diagram of a digital sensor digital amplifier of a high-speed rail brake system according to the present invention;
FIG. 3 is a schematic view of the structure of the elastomer of the present invention;
fig. 4 is a schematic structural diagram of a flexible PCB of the present invention;
fig. 5 is a schematic structural diagram of a strain element according to the present invention.
Detailed Description
The preferred embodiments of the present invention will be described hereinafter with reference to the accompanying drawings, and it should be understood that the preferred embodiments described herein are merely for purposes of illustration and explanation, and are not intended to limit the present invention.
In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", etc. indicate the orientation or positional relationship based on the figure 1 of the specification, which is only for the convenience of description of the present invention and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore should not be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may for example be fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.
As shown in fig. 1 to 5, the present embodiment provides a digital sensor of a high-speed rail brake system, which includes an elastic body 1, 8 strain elements 2, a flexible PCB 3, 2 cable assemblies 5, and a digital amplifier 6. The elastic body 1 is a flat hollow cylindrical structure, and an annular groove 11 is arranged on the upper end face of the elastic body 1. Due to the restriction of the installation position of the sensor, in the present embodiment, the maximum diameter of the elastic body 1 is 100mm, and the height is 12mm; the elastic body 1 is made of aluminum, so that the light weight design of the sensor is realized, and the cost is low.
In the present embodiment, the strain element 2, the flexible PCB 3, and the digital amplifier 6 are disposed in the annular groove 11 by silicone encapsulation. Wherein 8 first strain gauges 21 constitute 1 wheatstone measurement circuit, and the other 8 second strain gauges 22 constitute 1 wheatstone measurement circuit. The output end of the 2 Wheatstone measuring circuits is electrically connected with the input end of the flexible PCB circuit board 3, the output end of the flexible PCB circuit board 3 is electrically connected with the input end of the digital amplifier 6 through the wire 4, and the output end of the digital amplifier 6 is electrically connected with the input end of the cable assembly 5. Wherein, 2 wheatstone measuring circuit mutual independence, 2 wheatstone measuring circuit can realize independent dual output through cable assembly 5 respectively, simultaneously, because 2 wheatstone measuring circuit output signal are the same, can also realize mutual monitoring, are convenient for judge every way output data true effective.
In this embodiment, each strain unit 2 includes a substrate 20, a first strain gauge 21, and a second strain gauge 22, the first strain gauge 21 and the second strain gauge 22 are disposed on the substrate 20, and 8 first strain gauges 21 and 8 second strain gauges 22 respectively form 2 wheatstone measurement circuits. Wherein the substrate 20 has a thickness of 35 microns. Typically, the strain gage substrate 20 has a thickness of about 25 microns, which has been shown experimentally to be incapable of withstanding voltages above 700VAC, whereas the present sensor can withstand high voltages of 1000VAC by increasing the thickness of the substrate 20 to 35 microns, thereby improving the high voltage resistance of the product.
In this embodiment, the flexible PCB 3 is a circular sheet structure, the flexible PCB 3 is provided with 4 first rectangular positioning holes 31 and 4 second positioning holes 32, the inner long sides of the 4 first rectangular positioning holes 31 are open structures, and the outer long sides of the 4 first rectangular positioning holes 32 are circumscribed on the same circle coaxial with the flexible PCB 3; the 4 first rectangular positioning holes 31 and the 4 second positioning holes 32 are uniformly arranged in the circumferential direction of the flexible PCB 3 at intervals, the inner long side and the outer long side of the 4 second positioning holes 32 are externally tangent to the same circle coaxial with the flexible PCB 3, and the outer long side of the second positioning hole 32 is located outside the outer long side of the first rectangular positioning hole 31 in the radial direction of the flexible PCB 3. The strain unit 2 is attached to the bottom wall of the annular groove and located in the first rectangular positioning hole 31 to form a positive strain unit, and the strain unit 2 is attached to the bottom wall of the annular groove and located in the second positioning hole 32 to form a negative strain unit. The first rectangular positioning holes 31 and the second rectangular positioning holes 32 are uniformly distributed at intervals in the circumferential direction of the flexible PCB 3, the positions of the positive strain unit and the negative strain unit are respectively limited by the first rectangular positioning holes 31 and the second rectangular positioning holes 32, and 2 independent wheatstone circuits formed by 8 first strain gauges 21 and 8 second strain gauges 22 can effectively prevent output abnormality caused by load eccentricity or unbalance loading, and improve the linear performance of products.
In some embodiments, the digital amplifier 6 is a fan-ring sheet structure, and the digital amplifier 6 is located above the flexible PCB 3 with a separation mechanism disposed therebetween. The separation mechanism adopts a silica gel layer which is arranged between the digital amplifier 6 and the flexible PCB 3.
When the product is assembled, 8 strain units 2 are attached to the bottom wall of the annular groove, then the flexible PCB is placed into the annular groove, so that the 8 strain units 2 are respectively located in the first rectangular positioning hole 31 and the second positioning hole 32 to form corresponding positive strain units and negative strain units, then a silica gel layer is coated on the upper surface of the flexible PCB, the digital amplifier, the flexible PCB and the cable assembly are welded and then placed on the silica gel layer, and finally the digital amplifier, the flexible PCB and the cable assembly are packaged through silica gel. In the embodiment, interference influence between the digital amplifier and the flexible PCB can be effectively prevented through the silica gel layer.
In some embodiments, the digital amplifier 6 is a fan-ring sheet structure, and the digital amplifier 6 is located above the flexible PCB 3 with a separation mechanism disposed therebetween. The partition mechanism adopts 3 reference columns, and 3 reference columns are vertically arranged on the bottom wall of the annular groove, and the flexible PCB circuit board is provided with 3 through holes.
When the product equipment, with the unit of meeting an emergency 2 attached on the diapire of annular groove, then put into the annular groove with flexible PCB circuit board, make unit of meeting an emergency 2 be located first rectangle locating hole 31 and second locating hole 32 respectively and constitute positive strain unit and negative strain unit, at this moment, 3 reference columns pass 3 through-holes of flexible PCB circuit board and the top of reference column and bulge the upper surface certain distance of flexible PCB circuit board, then with digital amplifier and flexible PCB circuit board, place in the top of reference column after the cable subassembly welding, encapsulate through silica gel at last. In the embodiment, interference influence between the digital amplifier and the flexible PCB can be effectively prevented through the positioning column.
The working principle of the present embodiment is further explained as follows:
the sensor is integrated on a brake actuator to measure the applied braking force, the strain gauge senses the pressure to generate signal change, then the digital amplifier converts an analog signal into a digital signal, and when the braking force changes, the signal can be transferred to the sensor, and then the sensor feeds back the signal to a brake system in real time.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The digital sensor of the high-speed rail brake system is characterized by comprising an elastic body (1), 8 strain units (2), a flexible PCB (printed circuit board) (3), 2 cable assemblies (5) and a digital amplifier (6), wherein the elastic body (1) is of a hollow cylindrical structure, and an annular groove (11) is formed in the upper end face of the elastic body (1); 8 strain unit (2) constitute 2 Wheatstone measuring circuit, strain unit (2), flexible PCB circuit board (3), digital amplifier (6) set up in annular groove (11) through the silica gel encapsulation, and 2 Wheatstone measuring circuit's output is connected with the input electricity of flexible PCB circuit board (3), the output of flexible PCB circuit board (3) is connected with the input electricity of digital amplifier (6), the output of digital amplifier (6) is connected with the input electricity of cable subassembly (5).
2. The digital sensor of the high-speed rail brake system according to claim 1, wherein each strain unit (2) comprises a substrate (20), a first strain gauge (21) and a second strain gauge (22), the first strain gauge (21) and the second strain gauge (22) are arranged on the substrate (20), and 8 first strain gauges (21) and 8 second strain gauges (22) respectively form 2 Wheatstone measuring circuits.
3. The digital sensor of the high-speed rail brake system according to claim 2, wherein the flexible PCB (3) is a circular sheet-shaped structure, 4 first rectangular positioning holes (31) and 4 second positioning holes (32) are formed in the flexible PCB (3), the inner long side of the 4 first rectangular positioning holes (31) is an open structure, and the outer long side of the 4 first rectangular positioning holes (31) is circumscribed on the same circle coaxial with the flexible PCB (3); the 4 first rectangular positioning holes (31) and the 4 second positioning holes (32) are uniformly arranged in the circumferential direction of the flexible PCB (3) at intervals, the inner long side and the outer long side of the 4 second positioning holes (32) are externally tangent to the same circle which is coaxial with the flexible PCB (3), and the outer long side of the second positioning holes (32) is located on the outer side of the outer long side of the first rectangular positioning holes (31) in the radial direction of the flexible PCB (3).
4. The digital sensor of the high-speed rail brake system according to claim 3, wherein the strain unit (2) is attached to the bottom wall of the annular groove and located in the first rectangular positioning hole (31) to form a positive strain unit, and the strain unit (2) is attached to the bottom wall of the annular groove and located in the second positioning hole (32) to form a negative strain unit.
5. The digital sensor of the high-speed rail brake system according to claim 1, wherein the digital amplifier (6) is a fan-ring sheet structure, the digital amplifier (6) is located above the flexible PCB (3) and a separation mechanism is arranged between the digital amplifier and the flexible PCB.
6. The digital sensor of the high-speed rail brake system according to claim 5, wherein the separation mechanism is a silica gel layer, and the silica gel layer is arranged between the digital amplifier (6) and the flexible PCB circuit board (3).
7. The digital sensor for the brake system of a high-speed rail according to claim 5, wherein the separation mechanism is a positioning column, and the positioning column is arranged on the wall of the annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222975084.3U CN218577727U (en) | 2022-11-09 | 2022-11-09 | Digital sensor of high-speed rail brake system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222975084.3U CN218577727U (en) | 2022-11-09 | 2022-11-09 | Digital sensor of high-speed rail brake system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218577727U true CN218577727U (en) | 2023-03-07 |
Family
ID=85376609
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222975084.3U Active CN218577727U (en) | 2022-11-09 | 2022-11-09 | Digital sensor of high-speed rail brake system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218577727U (en) |
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2022
- 2022-11-09 CN CN202222975084.3U patent/CN218577727U/en active Active
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