A magnetoelectric speed sensor for monitoring engine speed

Abstract

This utility model discloses a magnetoelectric speed sensor for monitoring engine speed, including a housing and a body installed inside the housing. A probe body is disposed inside the body, and a probe base is disposed on the rear side of the housing. Connecting lines are disposed on the rear outer wall of the probe base near both the left and right sides. Multiple bonding pieces are equidistantly disposed on the circular outer wall of the body, and a heat-conducting rod is fixedly connected to one end of each bonding piece. Multiple heat dissipation columns are disposed inside the circular outer wall of the housing. By installing the bonding pieces, heat-conducting rod, and heat dissipation columns, the heat dissipation columns dissipate heat to the outside of the housing, effectively reducing the body temperature and minimizing thermal aging of electronic components caused by prolonged exposure to high temperatures. This ensures the stable performance of electronic components and guarantees that the signal processing circuit can accurately amplify, filter, and shape the sensed signal.

Description

Technical Field

[0001] This utility model belongs to the technical field of speed sensors, specifically relating to a magnetoelectric speed sensor for monitoring engine speed. Background Technology

[0002] A magnetoelectric speed sensor is a device specifically designed for accurately monitoring engine speed. It uses the principle of electromagnetic induction to convert the engine's rotational motion into an electrical signal output, providing crucial speed information to the engine control system and related equipment to ensure the engine's stable and efficient operation.

[0003] However, after prolonged operation, the performance of the magnetoelectric speed sensor gradually decreases as the temperature rises because the device is completely sealed. Utility Model Content

[0004] The purpose of this invention is to provide a magnetoelectric speed sensor for monitoring engine speed, in order to solve the problem that the performance of the magnetoelectric speed sensor mentioned in the background art gradually decreases as the temperature gradually increases.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a magnetoelectric speed sensor for monitoring engine speed, comprising a housing and a body installed inside the housing;

[0006] The probe body is installed inside the body;

[0007] A probe base is provided on the rear side of the housing;

[0008] The probe base has connecting wires on its rear outer wall, near the left and right sides respectively.

[0009] Multiple bonding pieces are equidistantly arranged on the circular outer wall of the body, and a heat-conducting rod is fixedly connected to one end of each bonding piece. Multiple heat dissipation columns are arranged inside the circular outer wall of the outer shell.

[0010] Preferably, a central ring is fixedly connected between the plurality of heat-conducting rods to restrict the position of the heat-conducting rods and the heat dissipation column.

[0011] Preferably, the outer circular wall of the outer shell has multiple limiting grooves inside to limit the position of the heat dissipation column, and the inner circular walls of the multiple limiting grooves and the outer circular wall of the heat dissipation column are in contact with each other.

[0012] Preferably, a distance is reserved between the circular outer wall of the plurality of heat dissipation columns and the opening of the limiting groove.

[0013] Preferably, a cover is embedded inside the front outer wall of the housing to restrict the position of the body.

[0014] Preferably, a first adjusting nut and a second adjusting nut are respectively provided on the circular outer wall of the outer casing and near the front and rear sides.

[0015] Preferably, the outer circular wall of the housing and the inner circular wall of the first adjusting nut and the second adjusting nut are both provided with threads, and the outer circular wall of the housing and the first adjusting nut and the second adjusting nut are screwed together.

[0016] Preferably, a circuit board is provided inside the probe base.

[0017] Compared with the prior art, this utility model provides a magnetoelectric speed sensor for monitoring engine speed, which has the following advantages:

[0018] By installing bonding pads, heat-conducting rods, and heat dissipation columns, the body's temperature can be guided and transferred outwards through the bonding pads during prolonged operation. After being guided by the bonding pads, the temperature is transferred a second time through the heat-conducting rods, and finally delivered to the heat dissipation columns. The heat dissipation columns then dissipate the temperature to the outside of the casing, effectively reducing the body temperature and minimizing thermal aging of electronic components caused by prolonged exposure to high temperatures. This ensures the stable performance of electronic components and guarantees that the signal processing circuit can accurately amplify, filter, and shape the sensed signals. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a magnetoelectric speed sensor for monitoring engine speed according to the present invention.

[0020] Figure 2 This is a frontal partial structural diagram of the fuselage area of ​​this utility model.

[0021] Figure 3 This is a partial structural schematic diagram of the fuselage area of ​​this utility model from a frontal cross-section.

[0022] Figure 4 This is a partial side view of the outer shell area of ​​this utility model.

[0023] In the diagram: 1. Cover; 2. Outer shell; 3. Thread; 4. First adjusting nut; 5. Second adjusting nut; 6. Probe base; 7. Connecting wire; 8. Body; 9. Probe body; 10. Adhesive piece; 11. Heat-conducting rod; 12. Heat dissipation column; 13. Concentrated ring; 14. Limiting groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] This utility model provides, for example Figure 1-4 The magnetoelectric speed sensor shown includes a housing 2 and a body 8 installed inside the housing 2.

[0026] The probe body 9 is located inside the body 8;

[0027] A probe base 6 is provided on the rear side of the outer casing 2;

[0028] Connecting lines 7 are provided on the outer rear wall of the probe base 6, near the left and right sides respectively. The housing 2 of the magnetoelectric speed sensor is installed at a specific position on the engine to ensure that the probe body 9 and the rotating parts of the engine maintain a suitable distance and relative position. The connecting lines 7 on the left and right sides of the outer rear wall of the probe base 6 are connected to the corresponding interfaces of the engine control system. After the engine starts running, its rotating parts move in the magnetic field around the probe body 9, causing a periodic change in the magnetic flux of the induction coil, which in turn generates an induced electromotive force signal in the induction coil. As the engine speed changes, the frequency of the change in magnetic flux also changes accordingly, causing the frequency of the induced electromotive force signal to change. This frequency is proportional to the engine speed. The induced electromotive force signal is transmitted to the signal processing circuit in the engine body 8. After amplification, filtering and shaping, it is converted into a regular pulse signal. By measuring the frequency of the pulse signal, the real-time speed of the engine is calculated.

[0029] Multiple bonding pieces 10 are equidistantly arranged on the circular outer wall of the body 8. One end of each bonding piece 10 is fixedly connected to a heat-conducting rod 11. Multiple heat dissipation columns 12 are arranged inside the circular outer wall of the outer shell 2. The heat on the surface of the body 8 is quickly absorbed by the bonding pieces 10. The bonding pieces 10 transfer the heat to the heat-conducting rod 11. The heat-conducting rod 11 transfers the heat to the heat dissipation column 12. The heat dissipation column 12 dissipates the heat to the external environment through convection with the surrounding air.

[0030] like Figure 3 and Figure 4As shown, a central ring 13 is fixedly connected between multiple heat-conducting rods 11 to limit the position of the heat-conducting rods 11 and the heat dissipation column 12. Multiple limiting grooves 14 are opened inside the circular outer wall of the outer shell 2 to limit the position of the heat dissipation column 12. The circular inner wall of the multiple limiting grooves 14 and the circular outer wall of the heat dissipation column 12 fit together. A distance is reserved between the circular outer wall of the multiple heat dissipation column 12 and the opening of the limiting groove 14.

[0031] The concentrating ring 13, through its fixed connection with the heat-conducting rods 11, connects multiple heat-conducting rods 11 into a single structure. This prevents the heat-conducting rods 11 from shifting or deforming during operation due to factors such as vibration and thermal expansion and contraction. This ensures that the heat-conducting rods 11 can stably transfer the heat from the bonding sheet 10 to the heat dissipation column 12. The reserved distance allows for better air convection channels around the heat dissipation column 12. When air flows across the surface of the heat dissipation column 12 and carries away heat, the reserved space allows cool air to flow in more smoothly, accelerating the heat exchange process and improving heat dissipation efficiency.

[0032] like Figure 1 As shown, a cover 1 is embedded inside the front outer wall of the outer casing 2 to restrict the position of the body 8.

[0033] After the body 8 is installed inside the housing 2, the cover 1 blocks the body 8 from the front to prevent the body 8 from moving forward due to vibration, external impact or other factors during the operation of the sensor.

[0034] like Figure 1 As shown, a first adjusting nut 4 and a second adjusting nut 5 are respectively provided on the circular outer wall of the outer casing 2 and near the front and rear sides. Threads 3 are provided on the circular outer wall of the outer casing 2 and the circular inner walls of the first adjusting nut 4 and the second adjusting nut 5. The circular outer wall of the outer casing 2 and the first adjusting nut 4 and the second adjusting nut 5 are screwed together.

[0035] When the sensor is installed on the engine, it can be firmly fixed to the mounting position on the engine by rotating the first adjusting nut 4 and the second adjusting nut 5. This screwing method provides a reliable fastening force to ensure that the sensor will not loosen under engine vibration. When installing the sensor, the axial position of the sensor on the engine can be slightly adjusted by rotating the adjusting nut appropriately.

[0036] like Figure 1 As shown, a circuit board is installed inside the probe base 6.

[0037] The induced electromotive force signal generated by the probe body 9 inside the fuselage 8 is transmitted to the circuit board inside the probe base 6 after preliminary processing inside the fuselage 8. On this circuit board, the signal undergoes further fine processing such as amplification, filtering, and shaping to convert it into a signal form that is more suitable for long-distance transmission and can be accurately recognized by the engine control unit.

[0038] The implementation principle of this embodiment is as follows: The housing 2 of the magnetoelectric speed sensor is installed at a specific position on the engine, ensuring that the probe body 9 maintains a suitable distance and relative position with the rotating parts of the engine. The connecting lines 7 on the left and right sides of the rear outer wall of the probe base 6 are connected to the corresponding interfaces of the engine control system. After the engine starts running, its rotating parts move in the magnetic field around the probe body 9, causing a periodic change in the magnetic flux of the induction coil, which in turn generates an induced electromotive force signal in the induction coil. As the engine speed changes, the frequency of the change in magnetic flux also changes accordingly, causing the frequency of the induced electromotive force signal to change. This frequency is proportional to the engine speed. The induced electromotive force signal is transmitted to the signal processing circuit in the body 8. After amplification, filtering and shaping, it is converted into a regular pulse signal. By measuring the frequency of the pulse signal, the real-time speed of the engine is calculated. The heat on the surface of the body 8 is quickly absorbed by the bonding sheet 10. The bonding sheet 10 transfers the heat to the heat conduction rod 11. The heat conduction rod 11 transfers the heat to the heat dissipation column 12. The heat dissipation column 12 dissipates the heat to the external environment through convection with the surrounding air.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A magnetoelectric speed sensor for monitoring engine speed, comprising a housing (2) and a body (8) installed inside the housing (2); The probe body (9) is installed inside the body (8); A probe base (6) is provided on the rear side of the outer casing (2); The probe base (6) has connecting lines (7) on its rear outer wall and near the left and right sides respectively; characterized in that Multiple bonding pieces (10) are equidistantly arranged on the circular outer wall of the body (8), and a heat-conducting rod (11) is fixedly connected to one end of each bonding piece (10). Multiple heat dissipation columns (12) are arranged inside the circular outer wall of the outer shell (2).

2. A magneto-electric speed sensor for monitoring the rotational speed of an engine according to claim 1, characterized in that: A central ring (13) is fixedly connected between the plurality of heat-conducting rods (11) to limit the position of the heat-conducting rods (11) and the heat dissipation column (12).

3. A magneto-electric speed sensor for monitoring the rotational speed of an engine according to claim 1, characterized in that: The outer circular wall of the outer shell (2) is provided with multiple limiting grooves (14) to limit the position of the heat dissipation column (12). The inner circular walls of the multiple limiting grooves (14) and the outer circular wall of the heat dissipation column (12) are in contact with each other.

4. A magneto-electric speed sensor for monitoring the rotational speed of an engine according to claim 1, characterized in that: A distance is reserved between the circular outer wall of the plurality of heat dissipation columns (12) and the opening of the limiting groove (14).

5. A magneto-electric speed sensor for monitoring the engine speed according to claim 1, characterized in that: The front outer wall of the outer casing (2) is fitted with a cover (1) to restrict the position of the body (8).

6. A magneto-electric speed sensor for monitoring the rotational speed of an engine according to claim 1, characterized in that: The outer circular wall of the outer casing (2) is provided with a first adjusting nut (4) and a second adjusting nut (5) respectively near the front and rear sides.

7. A magneto-electric speed sensor for monitoring the rotational speed of an engine according to claim 1, characterized in that: The outer circular wall of the outer shell (2) and the inner circular wall of the first adjusting nut (4) and the second adjusting nut (5) are both provided with threads (3), and the outer circular wall of the outer shell (2) and the first adjusting nut (4) and the second adjusting nut (5) are screwed together.

8. A magneto-electric speed sensor for monitoring the rotational speed of an engine according to claim 1, characterized in that: The probe base (6) has a circuit board installed inside.

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