A vibration and temperature sensor and a railway vehicle

Abstract

The utility model discloses a vibration temperature sensor and railway vehicle, vibration temperature sensor shell, shield shell, insulating part, temperature probe and cable, the shell has the accommodation, shield shell sets up in the accommodation cavity, is provided with vibration sensor in shield shell, and insulating part sets up between shield shell and the lateral wall of accommodation cavity, and temperature probe is connected in the shell, and cable is connected in the shell, and vibration sensor and temperature probe all are connected with cable electricity. The utility model discloses a double shielding design through shell and shield shell, combines the electrical isolation structure of insulating part setting between shield shell and the lateral wall of accommodation cavity, effectively inhibits external electromagnetic interference, prevents vibration sensor signal distortion and internal electronic component breakdown, and temperature probe and vibration sensor all are connected with cable electricity, realizes the integrated monitoring of vibration and temperature, improves the accuracy and reliability of signal acquisition, avoids false alarm or the alarm, ensures the long -term stable operation and the driving safety of railway vehicle under the harsh working condition.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, and in particular to a vibration temperature sensor and a rail vehicle. Background Technology

[0002] In the rail transit sector, real-time monitoring of vehicle operating status is crucial for ensuring safety, with vibration and temperature signals being key parameters reflecting vehicle health. Variable capacitance vibration sensors are widely used for vibration monitoring due to their high sensitivity and fast response. However, in the actual operating environment of rail vehicles, especially in critical components such as axle boxes, the coordinated operation of complex electrical equipment and high-voltage motors often generates strong surge transient high-voltage pulses and electromagnetic interference. These interference factors are easily conducted through the sensor input, leading to breakdown of internal electronic components or signal distortion. Simultaneously, electromagnetic noise couples into the signal lines, introducing noise and reducing the accuracy of monitoring data. Existing sensors mostly focus on single-function implementation, lacking integrated surge protection and electromagnetic interference immunity design, making it difficult to operate stably for extended periods under harsh conditions. Unreliable signal acquisition can lead to false alarms or missed alarms, directly threatening operational safety. Therefore, we provide a vibration and temperature sensor and a rail vehicle to address these issues. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a vibration temperature sensor and a rail vehicle.

[0004] The objective of this utility model is achieved through the following technical solution: A vibration temperature sensor, comprising: A housing having a receiving cavity; A shielding shell is disposed within the accommodating cavity, and a vibration sensor is disposed within the shielding shell; An insulating element is disposed between the shielding shell and the sidewall of the accommodating cavity; A temperature probe, which is connected to the housing; A cable is connected to the housing, and the vibration sensor and the temperature probe are both electrically connected to the cable.

[0005] Preferably, the outer shell includes a shell body and a base, the shell body and the base enclosing the receiving cavity, the shell body having an opening, the base for closing the opening, and the insulating member fixedly connected to the base.

[0006] Preferably, the base has a first recessed groove, the insulating component is fixedly disposed in the first recessed groove, the insulating component has a second recessed groove, and the vibration sensor is disposed in the second recessed groove.

[0007] Preferably, the vibration temperature sensor has a first direction, the depth of the second sink along the first direction is H1, and the height of the insulating member along the first direction is H2, satisfying: H2≥H1.

[0008] Preferably, the temperature probe includes a probe body connected to the housing, the probe body having a mounting cavity, and a temperature sensor disposed within the mounting cavity.

[0009] Preferably, the cable includes an outer jacket connected to the outer shell, and a cable body is disposed inside the outer jacket. The temperature probe and the vibration sensor are both electrically connected to the cable body.

[0010] Preferably, the cable further includes an electrical connector connected to the end of the outer jacket facing away from the outer shell, and the cable body is electrically connected to the electrical connector.

[0011] Preferably, the vibration temperature sensor further includes a surge protection module, which is disposed within the accommodating cavity and is electrically connected to the cable.

[0012] This application also provides a rail vehicle, characterized in that it comprises: The vehicle body has a mounting position; The vibration temperature sensor described in any of the above, wherein the vibration temperature sensor is disposed at the mounting position shown.

[0013] This utility model has the following advantages: 1. This utility model effectively suppresses external electromagnetic interference and prevents vibration sensor signal distortion and internal electronic component breakdown through a double shielding design of the outer shell and shielding shell, combined with an electrical isolation structure in which an insulating component is set between the shielding shell and the side wall of the accommodating cavity. At the same time, both the temperature probe and the vibration sensor are electrically connected to the cable, realizing integrated monitoring of vibration and temperature, improving the accuracy and reliability of signal acquisition, avoiding false alarms or missed alarms, and ensuring the long-term stable operation and driving safety of rail vehicles under harsh working conditions.

[0014] 2. This utility model sets the outer shell as a split structure in which the shell body and the base enclose the cavity to accommodate it, and closes the opening of the shell body with the base, which makes the installation of the inner shielding shell and insulating components more convenient. At the same time, the insulating components are fixedly connected to the base, ensuring stable and reliable electrical isolation between the vibration sensor and the outer shell through the shielding shell and the insulating components. This structure is easy to manufacture and seal, and effectively enhances the sensor's anti-interference ability and the stability of the overall structure in the complex electromagnetic environment of rail vehicles. Attached Figure Description

[0015] Figure 1 This is a cross-sectional schematic diagram of the vibration temperature sensor of this utility model.

[0016] Figure 2 This utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0017] Figure 3 This is a cross-sectional view of the temperature sensor of this utility model under an explosion condition.

[0018] Figure 4 This is a schematic diagram of the structure of the vibration temperature sensor of this utility model under an explosion state.

[0019] Figure 5 This is a schematic diagram of the structure of the vibration temperature sensor of this utility model in its assembled state.

[0020] In the diagram, 100 is the outer casing; 101 is the accommodating cavity; 110 is the casing body; 111 is the opening; 120 is the base; 121 is the first recess; 200 is the shielding shell; 201 is the vibration sensor; 300 is the insulating component; 301 is the second recess; 400 is the temperature probe; 410 is the probe body; 411 is the mounting cavity; 420 is the temperature sensor; 500 is the cable; 510 is the outer jacket; 520 is the cable body; 530 is the electrical connector; 600 is the surge protection module; Z represents the first direction. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0022] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0023] like Figure 1 — Figure 5 The example shown.

[0024] A vibration-temperature sensor includes a housing 100, a shielding shell 200, an insulating element 300, a temperature probe 400, and a cable 500. Specifically, the housing 100 has a receiving cavity 101, the shielding shell 200 is disposed within the receiving cavity 101, a vibration sensor 201 is disposed within the shielding shell 200, the insulating element 300 is disposed between the shielding shell 200 and the side wall of the receiving cavity 101, the temperature probe 400 is connected to the housing 100, and the cable 500 is connected to the housing 100. Both the vibration sensor 201 and the temperature probe 400 are electrically connected to the cable 500.

[0025] Please see Figure 1 and Figure 2 As shown, in this embodiment, by placing the vibration sensor 201 inside the shielding shell 200, and placing the shielding shell 200 inside the accommodating cavity 101 of the outer shell 100, dual shielding of external signals is achieved through the combined action of the outer shell 100 and the shielding shell 200. Furthermore, an insulating component 300 is provided between the shielding shell 200 and the outer shell 100, thereby isolating the electrical connection between the shielding shell 200 and the outer shell 100. This ensures that the vibration sensor 201 in the shielding shell 200 is not conductive to the outer shell 100, thus ensuring that the chip output signal of the vibration sensor 201 is not grounded. This solves the problem of electromagnetic signal anti-interference in complex railway vehicle equipment and supporting high-voltage motor equipment. It can be understood that by not directly connecting the vibration sensor 201 to the outer shell 100 and by the dual isolation and shielding of the shielding shell 200 and the outer shell 100, the problem of surge pulse voltage conduction damage and electromagnetic interference in the environment of complex railway vehicle equipment and supporting high-voltage motor equipment is effectively solved, ensuring the stability and reliability of vehicle health status signal acquisition under track application conditions.

[0026] Furthermore, the outer casing 100 is installed in contact with the housing of the vehicle axle box, which can effectively ground and conduct electricity, thus effectively releasing external electromagnetic interference signals.

[0027] For example, vibration sensor 201 is a variable capacitance vibration sensor. A variable capacitance vibration sensor is a testing instrument that converts the force generated by physical phenomena such as acceleration, vibration, and impact into an easily measurable electrical signal. The variable capacitance vibration sensor uses a capacitor core as the conversion element, changing the distance between the capacitor plates or the dielectric constant through vibration, thereby converting the mechanical vibration into a change in capacitance. The capacitance is then converted into a measurable voltage or current signal through a circuit.

[0028] Data collected from temperature probe 400 and vibration sensor 201 can be connected to the corresponding processor via cable 500 for processing to complete vibration and temperature acquisition.

[0029] In some embodiments, the housing 100 includes a housing body 110 and a base 120, the housing body 110 and the base 120 enclosing a receiving cavity 101, the housing body 110 having an opening 111, the base 120 for closing the opening 111, and an insulating member 300 fixedly connected to the base 120.

[0030] Please continue reading. Figure 1 , Figure 2 , Figure 3 as well as Figure 4 As shown, in order to accommodate and install the shielding shell 200 and the insulating component 300, a shell body 110 is opened on the shell body 110, and then the opening 111 is closed by the base 120.

[0031] In this embodiment, the base 120 and the shell body 110 are connected and fixed by laser welding, and the gap between the base 120 and the shell body 110 can also be sealed.

[0032] In some embodiments, the base 120 has a first sink 121, the insulating member 300 is fixedly disposed in the first sink 121, the insulating member 300 has a second sink 301, and the vibration sensor 201 is disposed in the second sink 301.

[0033] Please see Figure 2 and Figure 3 As shown, in order to make the shielding shell 200 more stable, corresponding grooves are made on the base 120 and the insulating component 300. Specifically, the insulating component 300 is fixed in the first groove 121 by adhesive, and the shielding shell 200 is fixed in the second groove 301 by adhesive.

[0034] In some embodiments, the temperature sensor has a first direction, the depth of the second sink 301 along the first direction is H1, and the height of the insulating member 300 along the first direction is H2, satisfying: H2≥H1.

[0035] Please continue reading. Figure 2 As shown, in order to further insulate the shielding shell 200, i.e. to prevent the shielding shell 200 from contacting the outer shell 100 to achieve connection, the height of the insulating member 300 should be equal to or higher than the depth of the second sink 301, so that the top surface of the insulating member 300 is at least parallel to the upper surface of the base 120. In actual design, the height of the insulating member 300 should be greater than the depth of the second sink 301.

[0036] In some embodiments, the temperature probe 400 includes a probe body 410 connected to the housing 100, the probe body 410 having a mounting cavity 411, and a temperature sensor 420 disposed in the mounting cavity 411.

[0037] like Figure 1As shown, in order to enable the temperature sensor 420 to be electrically connected to the cable 500, a corresponding connecting hole should be opened on the base 120 so that the mounting cavity 411 is connected to the receiving cavity 101. The wire connected to the temperature sensor 420 passes through the mounting cavity 411, the connecting hole of the base 120 and the receiving cavity 101 to achieve electrical connection with the cable 500.

[0038] In some embodiments, the cable 500 includes a jacket 510 connected to the housing 100, and a cable body 520 is disposed inside the jacket 510. The temperature probe 400 and the vibration sensor 201 are both electrically connected to the cable body 520.

[0039] See Figure 1 and Figure 3 As shown, in order to prevent the cable body 520 from being damaged, the cable body 520 is placed inside the outer jacket 510 to prevent the cable body 520 from being damaged during long-term use.

[0040] To further shield against external electromagnetic interference that could cause data transmission to the cable body 520, a shielded cable can be selected for the cable body 520.

[0041] For example, the cable body 520 is a smokeless and halogen-free shielded cable. In practice, cables that can shield external electromagnetic fields can also be selected. The specific type is not limited here.

[0042] In some embodiments, the cable 500 further includes an electrical connector 530, which is connected to the end of the jacket 510 away from the housing 100, and the cable body 520 is electrically connected to the electrical connector 530.

[0043] Please see Figures 1 to 5 As shown, in order to transmit the signal from the line body 520 to the control processor, a connection is made through the electrical connector 530. It can be understood that the electrical connector 530 has a socket corresponding to the control processor.

[0044] For example, the control processor can be a computer or the like that capable of processing data.

[0045] In one embodiment, the vibration temperature sensor further includes a surge protection module 600, which is disposed within the accommodating cavity 101 and is electrically connected to the cable 500.

[0046] To protect the vibration sensor 201 and the temperature sensor 420, both are electrically connected to the surge protection module 600. Specifically, the surge protection module 600 smooths and releases the instantaneous high voltage in the external surge environment, thereby protecting the vibration sensor 201 and the temperature sensor 420 and preventing damage to them due to the high voltage environment.

[0047] For example, the surge protection module 600 uses a combination circuit of TVS diode and varistor, with a surge (impulse) immunity of ±4kV, to prevent sensor damage and safety accidents caused by instantaneous surges during pantograph retraction and extension on rail vehicles or by abnormal high voltage contact.

[0048] In this embodiment, a rail vehicle is also disclosed, the vehicle including a vehicle body having a mounting position, wherein the vibration temperature sensor of any of the above is disposed in the mounting position.

[0049] For example, the rail vehicle can be a train, a high-speed rail passenger car, or other similar vehicle; the specific type is not limited. The vibration and temperature sensor can be installed on the axle box to achieve real-time monitoring of the vibration and temperature generated by the gears, bearings, and shafts of the axle box.

[0050] The working process of this utility model is as follows: A shielding shell 200 is installed inside the accommodating cavity 101 of the outer shell 100, and a vibration sensor 201 is installed inside the shielding shell 200. Simultaneously, an insulating component 300 is placed between the shielding shell 200 and the side wall of the accommodating cavity 101 to achieve electrical isolation between the vibration sensor 201 and the outer shell 100, preventing signal grounding. A temperature probe 400 has a temperature sensor 420 installed in the mounting cavity 411 within the probe body 410 for collecting temperature signals. Both the vibration sensor 201 and the temperature sensor 420 are electrically connected to the cable body 520 of the cable 500. The signal is transmitted through the cable body 520 to the electrical connector 530, and finally connected to the outer shell. The sensor is processed by a processor. During operation, the shielding shell 200 and the outer shell 100 form a double electromagnetic shield, effectively suppressing external electromagnetic interference, while the insulating component 300 ensures that the vibration sensor 201 maintains signal integrity in complex electrical environments. In addition, the surge protection module 600 installed in the accommodating cavity 101 is electrically connected to the cable 500 to absorb surge instantaneous pulse high voltage and protect the vibration sensor 201 and temperature sensor 420 from damage. Overall, the sensor integrates vibration and temperature monitoring functions and combines shielding, insulation and surge protection design to collect vibration and temperature data of key parts such as axle boxes in real time during the operation of rail vehicles, ensuring the accuracy and reliability of the monitoring data.

[0051] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vibration temperature sensor, characterized in that, include: The housing (100) has a receiving cavity (101); A shielding shell (200) is disposed in the accommodating cavity (101), and a vibration sensor (201) is disposed in the shielding shell (200). An insulating element (300) is disposed between the shielding shell (200) and the side wall of the accommodating cavity (101); Temperature probe (400) is connected to the housing (100). A cable (500) is connected to the housing (100), and the vibration sensor (201) and the temperature probe (400) are both electrically connected to the cable (500).

2. The vibration temperature sensor according to claim 1, characterized in that: The outer shell (100) includes a shell body (110) and a base (120), the shell body (110) and the base (120) enclose the receiving cavity (101), the shell body (110) has an opening (111), the base (120) is used to close the opening (111), and the insulating member (300) is fixedly connected to the base (120).

3. The vibration temperature sensor according to claim 2, characterized in that: The base (120) has a first sink (121), the insulating component (300) is fixedly disposed in the first sink (121), the insulating component (300) has a second sink (301), and the vibration sensor (201) is disposed in the second sink (301).

4. The vibration temperature sensor according to claim 3, characterized in that: The vibration temperature sensor has a first direction, the depth of the second sink (301) along the first direction is H1, and the height of the insulating member (300) along the first direction is H2, satisfying: H2≥H1.

5. The temperature sensor according to claim 1, characterized in that: The temperature probe (400) includes a probe body (410) connected to the housing (100), the probe body (410) having a mounting cavity (411), and a temperature sensor (420) disposed in the mounting cavity (411).

6. The vibration temperature sensor according to claim 1, characterized in that: The cable (500) includes a jacket (510) connected to the housing (100), and a cable body (520) is disposed inside the jacket (510). The temperature probe (400) and the vibration sensor (201) are both electrically connected to the cable body (520).

7. The vibration temperature sensor according to claim 6, characterized in that: The cable (500) also includes an electrical connector (530) connected to the end of the jacket (510) away from the outer shell (100), and the cable body (520) is electrically connected to the electrical connector (530).

8. The vibration temperature sensor according to claim 1, characterized in that: The vibration temperature sensor also includes a surge protection module (600), which is disposed in the accommodating cavity (101) and is electrically connected to the cable (500).

9. A rail vehicle, characterized in that: include: The vehicle body has a mounting position; The vibration temperature sensor according to any one of claims 1 to 8, wherein the vibration temperature sensor is disposed at the mounting position shown.

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