A three-axis vibration temperature composite rail transit sensor

Abstract

The invention discloses a three-axis vibration temperature composite rail transit sensor. The sensor comprises an outer shell, a temperature chip and an insulating gasket are arranged at the bottom of the outer shell, a positioning ring is arranged around the insulating gasket, a base is installed in the positioning ring, an inner cylinder is pressed around the base, a piezoelectric chip and a mass block are installed in the middle of the base, the piezoelectric chip is electrically connected to the spindle signal adjustment circuit, a pressure ring is threadedly connected to the outer shell, the pressure ring is tightly pressed on the top of the inner cylinder, a MEMS chip and a conditioning circuit are arranged between the outer side of the positioning ring and the outer shell, the MEMS chip and the conditioning circuit, the spindle signal adjustment circuit, the temperature chip are electrically connected to the six-core socket, the positioning ring and the pressure ring are both insulators, and the gap between the positioning ring, the inner cylinder, the pressure ring and the outer shell is filled with epoxy glue. The MEMS chip detects the vibration signals in the X and Y directions, the sensitive parts composed of the piezoelectric chip, the mass block, the fastening ring and the base detect the vibration signal in the Z direction, and the temperature chip detects the temperature signal, so as to comprehensively judge the fault of the locomotive.

Description

Technical Field

[0001] The invention relates to the field of sensors, and in particular to a three-axis vibration-temperature composite rail transit sensor. Background Art

[0002] Existing rail transit sensors are mainly based on temperature detection with axial (Z-direction) vibration, and cannot take into account vibration signals in other directions (X and Y directions). Due to the lack of vibration signals in other directions, it is impossible to fully detect locomotive faults. Summary of the invention

[0003] The purpose of the present invention is to provide a three-axis vibration-temperature composite rail transit sensor which can detect vibration signals in three directions of X, Y and Z and can detect temperature, which is more conducive to comprehensively judging the fault condition of the locomotive.

[0004] In order to achieve the above-mentioned purpose of the invention, the triaxial vibration temperature composite rail transit sensor of the present invention adopts the following technical scheme:

[0005] A three-axis vibration and temperature composite rail transit sensor comprises a mounting seat, wherein the mounting seat comprises a hollow outer shell body with a closed lower end, a bolt head is arranged at the bottom of the outer shell body, the inside of the bolt head is hollow, a temperature chip is installed inside the bolt head, an insulating gasket is sealed at the bottom of the outer shell body, a positioning ring is connected to the periphery of the insulating gasket, a base pressed on the top of the insulating gasket is installed in the positioning ring, an inner cylinder embedded in the positioning ring is pressed on the periphery of the base, the inner cylinder is a hollow structure, an upwardly protruding mounting boss is arranged in the middle of the base, the cross section of the mounting boss is triangular, piezoelectric chips are attached to the three side surfaces of the mounting boss, a mass block is attached to the outer side of each piezoelectric chip, and a clamping ring is sleeved on the outer sides of the three mass blocks, A spindle signal adjustment circuit embedded in the inner cylinder is arranged above the mounting boss, the piezoelectric chip is electrically connected to the spindle signal adjustment circuit, a pressure ring is threadedly connected in the outer shell, the pressure ring is pressed tightly on the top of the inner cylinder, a cover plate installed on the top of the outer shell is sealed above the pressure ring, a MEMS chip and a conditioning circuit are arranged between the outer side of the positioning ring and the outer shell, a six-core socket is arranged on the outer side of the outer shell, the MEMS chip and the conditioning circuit, the spindle signal adjustment circuit are electrically connected to the six-core socket, the temperature chip is electrically connected to the six-core socket, the insulating gasket, the positioning ring, and the pressure ring are all insulators, the gap between the positioning ring, the inner cylinder, the pressure ring and the outer shell is filled with epoxy glue, and the MEMS chip has built-in X and Y acceleration sensors. The sensitive parts composed of the base, the chip, the mass block, and the fastening ring are fixed in the mounting seat through the insulating gasket, the positioning ring and the pressure ring, and the electrical isolation from the mounting seat is formed by the insulating gasket, the positioning ring, the pressure ring and the epoxy glue. The cover plate and the outer shell form a waterproof and sealed shell. The spindle signal adjustment circuit processes the vibration signal collected by the sensitive component and converts it into a voltage signal output; the temperature chip is installed in the bottom bolt head of the outer shell to detect the internal working temperature of the locomotive in real time.

[0006] The bottom of the pressing ring is provided with an inner cover plate embedded in the top of the inner cylinder. The inner cover plate can provide certain electromagnetic shielding and protection for the spindle signal adjustment circuit.

[0007] The mount, base and inner barrel are made of stainless steel.

[0008] The temperature chip uses a single-line digital temperature chip.

[0009] Compared with the prior art, the present invention has the following beneficial effects:

[0010] The MEMS chip senses the vibration signals in the X and Y directions and converts them into voltage signals. The mass block of the sensitive part and the piezoelectric chip generate relative motion. The piezoelectric chip generates a charge signal of corresponding size according to the piezoelectric effect. The charge signal is converted into a vibration signal in the Z direction through the spindle signal adjustment circuit. The temperature chip detects the temperature model inside the locomotive. The sensor of the present invention can detect the vibration signals in the three directions of X\Y\Z at the same time and integrates the temperature detection function.

[0011] Vibration test integration: Integrate piezoelectric principle and MEMS technology into one sensor to give full play to their respective advantages;

[0012] The temperature chip adopts a single-line digital temperature chip with high precision and stable and reliable performance;

[0013] The insulating gasket, positioning ring and pressure ring are all insulators, using effective electrical isolation means to provide 1500V AC withstand voltage;

[0014] The sensitive parts are sealed inside the outer shell with epoxy glue to ensure the long-term accuracy of vibration signal detection;

[0015] The output mode adopts a six-core socket connector with three-button bayonet connection used in aviation and aerospace, which has excellent electrical parameters and air tightness, ensuring firmness and sealing performance while facilitating the installation and removal of product cables;

[0016] The mounting base is made of high-strength steel and treated with Dacromet, which greatly improves the strength and life of the overall structure.

[0017] The inner cover can provide certain electromagnetic shielding and protection for the spindle signal adjustment circuit, and can be used in complex electromagnetic environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 for Figure 1 sectional view of .

[0020] Among them, 1. six-core socket; 2. wire; 3. cover plate; 4. mounting seat; 41. outer shell; 42. bolt head; 5. pressure ring; 6. inner cover plate; 7. spindle signal conditioning circuit; 8. inner cylinder; 9. fastening ring; 10. piezoelectric chip; 11. mass block; 12. MEMS chip and conditioning circuit; 13. base; 131. mounting boss; 14. insulating gasket; 15. positioning ring; 16. temperature chip; 17. epoxy glue. DETAILED DESCRIPTION

[0021] The present invention is further explained below in conjunction with specific implementation methods. It should be understood that these implementation methods are only used to illustrate the present invention and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the present invention by those skilled in the art all fall within the scope defined by the claims attached to this application.

[0022] like Figure 1-2As shown, a three-axis vibration temperature composite rail transit sensor includes a mounting base 4, the mounting base includes a hollow outer shell 41 with a closed lower end, a bolt head 42 is arranged at the bottom of the outer shell, the inside of the bolt head is hollow, a temperature chip 16 is installed inside the bolt head, the temperature chip adopts a DS8B20 temperature chip, and the DS8B20 temperature chip is a single-line digital temperature chip, an insulating gasket 14 is sealed at the bottom of the outer shell 41, and a positioning ring 15 is sealed around the periphery of the insulating gasket 14, the positioning ring 15 is embedded in the inner bottom side of the outer shell, and a base 13 pressed on the top of the insulating gasket 14 is installed in the positioning ring, and the base The inner cylinder 8 embedded in the positioning ring is pressed around the periphery. The inner cylinder 8 is a hollow structure. The middle part of the base 13 is provided with an upwardly protruding mounting boss 131. The cross section of the mounting boss is triangular. The three sides of the mounting boss are attached with piezoelectric chips. The outer side of each piezoelectric chip 10 is attached with a mass block 11. The outer sides of the three mass blocks are sleeved with a clamping ring 9. The spindle signal adjustment circuit 7 embedded in the inner cylinder is arranged above the mounting boss. The piezoelectric chip is electrically connected to the spindle signal adjustment circuit. The outer shell is threadedly connected with a clamping ring 5. The clamping ring 5 is tightly pressed on the top of the inner cylinder. The bottom of the clamping ring 5 is provided with an inner cover plate 6 embedded in the top of the inner cylinder. The inner cover plate can provide certain electromagnetic shielding and protection for the spindle signal adjustment circuit. The cover plate 3 installed on the top of the outer shell is sealed above the pressure ring 5. A MEMS chip and a conditioning circuit 12 are installed between the outer side of the positioning ring and the outer shell. A six-core socket 1 is laser-welded on the outer side of the outer shell. The MEMS chip and conditioning circuit, the spindle signal adjustment circuit, the temperature chip and the six-core socket are electrically connected through a wire 2. The insulating gasket, the positioning ring, and the pressure ring are all insulators. The gap between the positioning ring, the inner tube, the pressure ring and the outer shell is filled with epoxy glue 17. The mounting seat, the base and the inner tube are made of stainless steel. The MEMS chip has built-in X and Y acceleration sensors. The sensitive parts composed of the base, the piezoelectric chip, the mass block, and the fastening ring are fixed in the mounting seat through the insulating gasket, the positioning ring and the pressure ring, and the insulating electrical isolation is formed by the insulating gasket, the positioning ring, the pressure ring and the epoxy glue. The cover plate and the outer shell form a waterproof and sealed shell. The spindle signal adjustment circuit processes the vibration signal collected by the sensitive part and converts it into a voltage signal output; the temperature chip is installed in the bottom bolt head of the outer shell to detect the internal working temperature of the locomotive in real time.

[0023] The MEMS chip will sense the vibration signals in the X and Y directions and convert them into voltage signals, which will be output through the six-core socket. The external vibration signals will be transmitted to the spindle sensitive part through the mounting seat and the base. The mass block of the sensitive part and the piezoelectric chip will produce relative movement. The piezoelectric chip will produce a charge signal of corresponding size according to the piezoelectric effect. The charge signal generated by the sensitive part will be converted into a vibration voltage signal in the Z direction through the spindle signal adjustment circuit and output through the six-core socket.

[0024] In the description of the present invention, it is necessary to understand that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of description and simplified description of the present invention, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] In the present invention, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0026] The above description shows and describes the preferred embodiments of the present invention. As mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A three-axis vibration temperature composite rail transit sensor, comprising a mounting seat, characterized in that: The mounting seat comprises a hollow outer shell body with a closed lower end, a bolt head is arranged at the bottom of the outer shell body, the bolt head is hollow inside, a temperature chip is installed inside the bolt head, an insulating gasket is sealed at the bottom of the outer shell body, a positioning ring is sealed and connected to the periphery of the insulating gasket, a base pressed on the top of the insulating gasket is installed in the positioning ring, an inner cylinder embedded in the positioning ring is pressed on the periphery of the base, the inner cylinder is a hollow structure, an upwardly protruding mounting boss is arranged in the middle of the base, the cross section of the mounting boss is triangular, piezoelectric chips are attached to the three sides of the mounting boss, a mass block is attached to the outer side of each piezoelectric chip, a clamping ring is sleeved on the outer sides of the three mass blocks, and a mounting boss is mounted on the top of the mounting boss. A spindle signal adjustment circuit is embedded in the inner cylinder, the piezoelectric chip is electrically connected to the spindle signal adjustment circuit, a pressure ring is threadedly connected to the outer shell, the pressure ring is tightly pressed on the top of the inner cylinder, and a cover plate installed on the top of the outer shell is closed above the pressure ring. A MEMS chip and a conditioning circuit are arranged between the outer side of the positioning ring and the outer shell, and a six-core socket is arranged on the outer side of the outer shell, the MEMS chip and the conditioning circuit, the spindle signal adjustment circuit, and the temperature chip are electrically connected to the six-core socket, the insulating gasket, the positioning ring, and the pressure ring are all insulators, the gaps between the positioning ring, the inner cylinder, the pressure ring and the outer shell are filled with epoxy glue, and the MEMS chip has built-in X and Y acceleration sensors.

2. The three-axis vibration temperature composite rail transit sensor according to claim 1 is characterized in that: An inner cover plate embedded in the top of the inner cylinder is arranged at the bottom of the pressing ring.

3. The three-axis vibration temperature composite rail transit sensor according to claim 1 is characterized in that: The mount, base and inner barrel are made of stainless steel.

4. The three-axis vibration temperature composite rail transit sensor according to claim 1 is characterized in that: The six-core socket and the outer shell are connected together by laser welding.

5. The three-axis vibration temperature composite rail transit sensor according to claim 1 is characterized in that: The temperature chip uses a single-line digital temperature chip.

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