An acceleration sensor

Abstract

The application discloses an acceleration sensor, which comprises a body, a main heat dissipation mechanism and a squeezing mechanism, the body is internally hollow and filled with damping liquid, the main heat dissipation mechanism comprises first heat dissipation fins and a heat dissipation pipeline, opposite two sides of the body are respectively provided with a liquid inlet and a liquid outlet, two ends of the heat dissipation pipeline are respectively connected with the liquid inlet and the liquid outlet, the first heat dissipation fins are arranged on the heat dissipation pipeline, and one-way valves are arranged at the two ends of the heat dissipation pipeline; the squeezing mechanism comprises a balloon, an electric push rod and a pressing plate, the balloon is arranged at the middle position of the heat dissipation pipeline in communication, and the end of the telescopic rod of the electric push rod is fixedly connected with the end surface of the pressing plate. The electric push rod pushes the pressing plate downward, the pressing plate squeezes the balloon, the damping liquid in the balloon is squeezed out from the liquid outlet, meanwhile, due to the negative pressure generated in the balloon when the balloon rebounds, the liquid inlet sucks the damping liquid into the heat dissipation pipeline, so that the damping liquid in the body is circulated, heat dissipation is carried out through the heat dissipation fins, and the heat dissipation effect in the acceleration sensor is better.

Description

Technical Field

[0001] This invention relates to an accelerometer, and more particularly to an accelerometer with good heat dissipation. Background Technology

[0002] An accelerometer is a sensor that can measure acceleration. It is usually composed of a mass, a damper, an elastic element, a sensitive element, and an adaptation circuit. During acceleration, the sensor obtains the acceleration value by measuring the inertial force on the mass and using Newton's second law. Depending on the sensor's sensitive element, common accelerometers include capacitive, inductive, strain gauge, piezoresistive, and piezoelectric types.

[0003] Existing accelerometers with good heat dissipation performance have a semiconductor cooling chip installed at the lower end of the mounting base. Utilizing the Peltier effect of semiconductor materials, when direct current passes through a thermocouple made of two different semiconductor materials connected in series, heat can be absorbed and released at the two ends of the thermocouple, respectively, releasing cold air. By aligning the cold end with the accelerometer body, the accelerometer body can be cooled down.

[0004] Although the above solution provides external heat dissipation for the accelerometer, the heat generated by the accelerometer is mainly internal. Simply cooling the surface of the accelerometer through the heat dissipation device is not effective. When measuring vibration velocity, the high temperature generated may lead to distorted measurement results or damage to the sensor. Summary of the Invention

[0005] This application provides an accelerometer that solves the technical problem of poor heat dissipation inside accelerometers in the prior art.

[0006] This application provides an acceleration sensor, including a body, the interior of which is a cavity filled with damping fluid, and further comprising:

[0007] An active heat dissipation mechanism includes a first heat dissipation fin and a heat dissipation pipe. An inlet and an outlet are respectively provided on two opposite sides of the main body. The two ends of the heat dissipation pipe are respectively connected to the inlet and the outlet. Several first heat dissipation fins are arranged on the heat dissipation pipe. A one-way valve is provided at both ends of the heat dissipation pipe.

[0008] The extrusion mechanism includes a balloon, an electric actuator, and a pressure plate. The balloon is connected to the middle position of the heat dissipation pipe, the pressure plate is fixedly installed on the top surface of the balloon, and the telescopic end of the electric actuator is fixedly connected to the end face of the pressure plate.

[0009] According to an accelerometer provided by the present invention, a base is fixedly disposed on the end face of the main body, the heat dissipation pipe is a corrugated pipe, the balloon is fixedly disposed on the base, and the first heat dissipation fin is fixedly disposed at the crest of the corrugated pipe.

[0010] According to an acceleration sensor provided by the present invention, the extrusion mechanism further includes a first connecting rod and a second connecting rod. The bellows is connected to both ends of the balloon. A baffle is fixedly provided at the middle position of each bellows. A mounting block is fixedly provided on the telescopic rod of the electric push rod. The first connecting rod is rotatably mounted on the mounting block. A synchronizing rod is fixedly connected between the two second connecting rods. One of the second connecting rods is located above the pressure plate, and the other second connecting rod passes through the base. The two ends of the second connecting rod are respectively fixedly connected to the corresponding baffles. The other end of the first connecting rod is hinged to the middle position of the second connecting rod near the liquid outlet.

[0011] According to an acceleration sensor provided by the present invention, a first bracket is fixedly provided on the top surface of the main body corresponding to the position of the base, a slide rail is fixedly provided on the first bracket, a second connecting rod above the pressure plate is slidably provided in the slide rail, a second bracket is fixedly provided on the top surface of the main body corresponding to the position of the baffle, a retaining ring is fixedly provided on the second bracket, and a spring is connected between the baffle and the retaining ring.

[0012] According to an accelerometer provided by the present invention, the accelerometer further includes a heat sink and a thermally conductive gel. The heat sink is fixedly disposed on the end face of the main body, and the thermally conductive gel is disposed between the first heat sink fins near the liquid outlet. The thermally conductive gel is operably compressible and in contact with the heat sink, and the heat sink is provided with a plurality of second heat sink fins.

[0013] According to an accelerometer provided by the present invention, the second heat dissipation fin is hinged to the heat dissipation plate, and an adjusting rod is hinged to the end of the second heat dissipation fin. The balloon is provided with push plates on both sides corresponding to the second heat dissipation fin. The push plates are slidably disposed on the heat dissipation plate, and the end of the adjusting rod is slidably disposed on the push plates.

[0014] According to an accelerometer provided by the present invention, the accelerometer further includes a housing, the main body is fixedly disposed in the housing, and an auxiliary heat dissipation mechanism is fixedly disposed on the top surface of the housing. The auxiliary heat dissipation mechanism is disposed corresponding to the second heat dissipation fins on both sides of the balloon, and the auxiliary heat dissipation mechanism includes:

[0015] Mounting base, the mounting base is fixedly disposed on the top surface inside the housing, the mounting base is corresponding to the position of the second heat dissipation fin;

[0016] A bellows, the top of which is fixedly connected to the mounting base;

[0017] The heat-conducting strips are multiple strips fixedly installed on the bottom surface of the air box, and the heat-conducting strips are arranged corresponding to the gaps between the second heat dissipation fins.

[0018] According to an accelerometer provided by the present invention, the accelerometer further includes a housing, the main body is fixedly disposed in the housing, the housing has an air inlet and an air outlet respectively on two sides corresponding to the liquid inlet and the liquid outlet, and an exhaust fan is fixedly disposed on the housing corresponding to the air outlet position.

[0019] According to an acceleration sensor provided by the present invention, the acceleration sensor further includes a first temperature sensor, a second temperature sensor, and a controller. The first temperature sensor is disposed inside the main body, the second temperature sensor is disposed inside the balloon, and the first temperature sensor, the second temperature sensor, the electric push rod, and the exhaust fan are all connected to the controller.

[0020] The present invention also provides a heat dissipation method for an accelerometer, which is applied to the aforementioned accelerometer, and the specific method is as follows:

[0021] The first temperature sensor and the second temperature sensor detect the temperature information inside the body and inside the balloon, respectively, and transmit the temperature information to the controller.

[0022] The controller receives temperature information detected by the first temperature sensor and the second temperature sensor, and compares the temperature information detected by the first temperature sensor and the second temperature sensor.

[0023] Set the temperature threshold of the first temperature sensor and the temperature difference threshold between the first temperature sensor and the second temperature sensor;

[0024] When the temperature detected by the first temperature sensor is greater than or equal to the temperature threshold, the controller sends an action signal to the electric actuator, and the electric actuator starts working after receiving the action signal.

[0025] When the temperature detected by the first temperature sensor is greater than or equal to the temperature threshold, and the temperature difference between the first temperature sensor and the second temperature sensor is less than the temperature difference threshold, the controller sends an action signal to the exhaust fan and the electric actuator respectively, and the exhaust fan and the electric actuator start working after receiving the action signal.

[0026] When the temperature detected by the first temperature sensor is greater than or equal to the temperature threshold, and the temperature difference between the first temperature sensor and the second temperature sensor is greater than or equal to the temperature difference threshold, the controller sends a high-frequency action signal to the electric actuator, and the electric actuator performs high-frequency operation after receiving the high-frequency action signal.

[0027] When the temperature detected by the first temperature sensor is lower than the temperature threshold, the electric actuator and exhaust fan will not work.

[0028] The beneficial effects of this application are as follows:

[0029] The accelerometer provided by this invention uses an electric push rod to push a pressure plate downwards, which squeezes the balloon. The damping fluid in the balloon is squeezed out from the outlet. At the same time, due to the negative pressure generated inside the balloon when it rebounds, the inlet draws the damping fluid into the heat dissipation pipe, so that the damping fluid in the body can circulate and dissipate heat through the heat dissipation fins, thus improving the heat dissipation effect inside the accelerometer. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention.

[0031] Figure 1 This is one of the overall structural schematic diagrams of an acceleration sensor provided in this application;

[0032] Figure 2 This is the second schematic diagram of the overall structure of an acceleration sensor provided in this application;

[0033] Figure 3 This application provides a schematic diagram of the extrusion mechanism in an accelerometer.

[0034] Figure 4 This application provides a schematic diagram of the engagement state of a baffle and a retaining ring in an accelerometer.

[0035] Figure 5 This is one of the structural schematic diagrams of an auxiliary heat dissipation mechanism in an accelerometer provided in this application;

[0036] Figure 6 This application provides a second schematic diagram of the auxiliary heat dissipation mechanism in an accelerometer.

[0037] Figure 7 This application provides a schematic diagram of the mating state between the body and the housing in an accelerometer.

[0038] Among them, 100-body; 110-liquid inlet; 120-liquid outlet; 130-one-way valve; 140-base; 150-baffle; 160-first bracket; 161-slide rail; 170-second bracket; 171-retaining ring; 172-spring; 180-heat sink; 181-thermal conductive gel; 182-second heat sink fins; 183-adjusting rod; 184-push plate; 190-shell; 191-air inlet; 192-air outlet; 193-exhaust fan;

[0039] 200 - Active cooling mechanism; 210 - First heat dissipation fin; 220 - Heat dissipation pipe; 340 - First connecting rod; 350 - Second connecting rod; 360 - Synchronizing rod;

[0040] 300 - Extrusion mechanism; 310 - Balloon; 320 - Electric actuator; 321 - Mounting block; 330 - Pressure plate;

[0041] 400 - Auxiliary heat dissipation mechanism; 410 - Mounting base; 420 - Air box; 430 - Heat conduction strip; 431 - Notch. Detailed Implementation

[0042] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0043] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0044] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0045] This application provides an acceleration sensor that solves the technical problem of poor heat dissipation in existing acceleration sensors.

[0046] The technical solution in this application is to solve the above-mentioned technical problems, and the general idea is as follows:

[0047] like Figure 1 , Figure 2 As shown, this application provides an acceleration sensor, including a body 100, the body 100 having an internal cavity filled with damping fluid, and further comprising:

[0048] An active heat dissipation mechanism 200 includes first heat dissipation fins 210 and heat dissipation pipes 220. Two opposite sides of the main body 100 are respectively provided with liquid inlet 110 and liquid outlet 120. The two ends of the heat dissipation pipes 220 are respectively connected to the liquid inlet 110 and liquid outlet 120. Several first heat dissipation fins 210 are provided on the heat dissipation pipes 220. One-way valves 130 are provided at both ends of the heat dissipation pipes 220.

[0049] The extrusion mechanism 300 includes a balloon 310, an electric actuator 320, and a pressure plate 330. The balloon 310 is connected to the middle position of the heat dissipation pipe 220. The pressure plate 330 is fixedly installed on the top surface of the balloon 310. The telescopic rod end of the electric actuator 320 is fixedly connected to the end face of the pressure plate 330.

[0050] The balloon 310 is made of silicone or polyurethane. By squeezing the balloon 310, the damping fluid inside is squeezed out. Due to the action of the one-way valve 130, the damping fluid in the heat dissipation pipe 220 flows in one direction, so that the damping fluid in the body 100 circulates in the active heat dissipation mechanism 200.

[0051] The electric actuator 320 pushes the pressure plate 330 downward, which squeezes the balloon 310. The damping fluid in the balloon 310 is squeezed out from the outlet 120. At the same time, due to the negative pressure generated inside the balloon 310 when it rebounds, the inlet 110 draws the damping fluid into the heat dissipation pipe 220, so that the damping fluid in the body 100 is circulated and dissipated through the heat dissipation fins, which improves the heat dissipation effect inside the accelerometer.

[0052] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0053] Specifically, such as Figure 1 , Figure 2As shown, a base 140 is fixedly installed on the end face of the main body 100. The heat dissipation pipe 220 is a corrugated pipe. The balloon 310 is fixedly installed on the base 140. The first heat dissipation fin 210 is fixedly installed at the crest of the corrugated pipe. In order to clearly show the specific structure of the active heat dissipation mechanism 200, the specific structure of the corrugated pipe is not shown in the figure.

[0054] The bellows is an elastic and stretchable bellows, and the first heat dissipation fin 210 is set at the crest of the bellows, which increases the heat dissipation radius of the first heat dissipation fin 210 and makes the heat dissipation effect of the first heat dissipation fin 210 better. Furthermore, the first heat dissipation fin 210 can move with the movement of the bellows, which can further improve the heat dissipation effect of the active heat dissipation mechanism 200.

[0055] Furthermore, such as Figure 1 , Figure 2 , Figure 3 As shown, the extrusion mechanism 300 also includes a first connecting rod 340 and a second connecting rod 350. The corrugated tubes are connected to both ends of the balloon 310. A baffle 150 is fixedly installed in the middle of each corrugated tube. An installation block 321 is fixedly installed on the telescopic rod of the electric push rod 320. The first connecting rod 340 is rotatably mounted on the installation block 321. A synchronizing rod 360 is fixedly connected between the two second connecting rods 350. One of the second connecting rods 350 is located above the pressure plate 330, and the other second connecting rod 350 passes through the base 140. The two ends of the second connecting rod 350 are fixedly connected to the corresponding baffles 150. The other end of the first connecting rod 340 is hinged to the middle of the second connecting rod 350 near the liquid outlet 120.

[0056] A mounting block 321 is fixedly installed on the telescopic rod of the electric actuator 320. The installation position of the mounting block 321 does not involve the area where the telescopic rod retracts, and the mounting block 321 does not affect the normal extension and retraction of the telescopic rod. During the up-and-down movement of the electric actuator 320, the first connecting rod 340 moves up and down with the electric actuator 320. Since the first connecting rod 340 and the second connecting rod 350 are set at a certain angle in the initial position, when the first connecting rod 340 moves downward, the first connecting rod 340 will gradually push the second connecting rod 350 towards the liquid outlet 120. The connecting rod 340 moves upward, and the first connecting rod 340 drives the second connecting rod 350 to move towards the liquid inlet 110. Then, the two second connecting rods 350 are fixedly connected by the synchronizing rod 360 and guided by the base 140, so that the second connecting rod 350 pushes the baffle 150 to move horizontally back and forth. Finally, the corrugated pipe moves horizontally back and forth. The first heat dissipation fin 210 on the outside of the corrugated pipe moves to facilitate the dissipation of heat. The inside of the corrugated pipe will provide a certain thrust to the damping fluid inside, which will further help the damping fluid inside the corrugated pipe to flow towards the liquid outlet 120.

[0057] Optionally, a gear and rack structure can also be used, with a first rack fixedly disposed between the two baffles 150 and a second rack fixedly disposed on the side of the electric push rod 320. The first rack and the second rack are arranged perpendicularly, and a gear is disposed at the intersection of the first rack and the second rack. The gear is fixedly disposed on the body 100 by a frame. When the electric push rod 320 moves downward, the second rack moves with the electric push rod 320. The gear transmits the vertical motion of the second rack to the horizontal motion of the first rack, and then the first rack moves horizontally with the two baffles 150, realizing the horizontal movement of the bellows. The connection relationship between the structures can be clearly expressed by the above description, so no corresponding schematic diagram is provided.

[0058] To further stabilize the second link 350 above the pressure plate 330, as follows: Figures 1-4 As shown, a first bracket 160 is fixedly installed on the top surface of the main body 100 corresponding to the position of the base 140. A slide rail 161 is fixedly installed on the first bracket 160. The second connecting rod 350 above the pressure plate 330 is slidably installed in the slide rail 161. A second bracket 170 is fixedly installed on the top surface of the main body 100 corresponding to the position of the baffle 150. A retaining ring 171 is fixedly installed on the second bracket 170. A spring 172 is connected between the baffle 150 and the retaining ring 171.

[0059] During the horizontal movement of the second link 350, the second link 350 slides in the slide rail 161. The slide rail 161 and the base 140 guide the two second links 350, so that the bellows can remain stable during the expansion and contraction. During the process of the second link 350 pushing the baffle 150 to move towards the liquid outlet 120, the baffle 150 compresses the spring 172. During the process of the electric actuator 320 driving the first link 340 to move upward, the thrust of the spring 172 pushes the baffle 150 and the second link 350 to move towards the liquid inlet 110, so as to avoid the second link 350 from being stuck due to friction during the movement.

[0060] Optional, such as Figures 1-4 As shown, the accelerometer also includes a heat sink 180 and a thermally conductive gel 181. The heat sink 180 is fixedly disposed on the end face of the body 100. The thermally conductive gel 181 is disposed between the first heat sink fins 210 near the liquid outlet 120. The thermally conductive gel 181 is disposed below the bellows. The thermally conductive gel 181 is operably compressible and in contact with the heat sink 180. The heat sink 180 is provided with a plurality of second heat sink fins 182.

[0061] As the second connecting rod 350 moves the bellows toward the outlet 120, the first heat dissipation fin 210 near the outlet 120 deforms the thermal conductive gel 181. The thermal conductive gel 181 contacts the heat dissipation plate 180 and transfers heat to the heat dissipation plate 180. At the same time, the heat dissipation plate 180 transfers the temperature of the body 100 surface and the thermal conductive gel 181 to the second heat dissipation fin 182, further improving the heat dissipation effect of the speed sensor.

[0062] Furthermore, such as Figure 5 , Figure 6 As shown, the second heat dissipation fin 182 is hinged to the heat dissipation plate 180. A torsion spring is provided at the hinge point between the second heat dissipation fin 182 and the heat dissipation plate 180. An adjusting rod 183 is hinged to the end of the second heat dissipation fin 182. The balloon 310 is provided with push plates 184 on both sides corresponding to the second heat dissipation fin 182. The push plates 184 are slidably disposed on the heat dissipation plate 180. The end of the adjusting rod 183 is slidably disposed on the push plate 184.

[0063] During the process of the electric push rod 320 flattening and expanding the balloon 310, the flattening and deformation of the balloon 310 will push the push plate 184 to move. During the movement, the push plate 184 will drive the second heat dissipation fin 182 to stand upright through the adjusting rod 183. The balloon 310 expands the second heat dissipation fin 182 and rotates towards the heat dissipation plate 180 through the action of the torsion spring. During the repeated flattening and expanding of the balloon 310, the second heat dissipation fin 182 can fully contact the air, improving the heat dissipation effect of the body 100 surface and the first heat dissipation fin 210.

[0064] In an alternative embodiment, such as Figures 5-7 As shown, the accelerometer also includes a housing 190, the main body 100 is fixedly disposed in the housing 190, and an auxiliary heat dissipation mechanism 400 is fixedly disposed on the top surface of the housing 190. The auxiliary heat dissipation mechanism 400 is disposed corresponding to the second heat dissipation fins 182 on both sides of the balloon 310. The auxiliary heat dissipation mechanism 400 includes:

[0065] Mounting base 410 is fixedly disposed on the top surface inside the housing 190, and the mounting base 410 corresponds to the position of the second heat dissipation fin 182;

[0066] The top end of the bellows 420 is fixedly connected to the mounting base 410;

[0067] The heat-conducting strip 430 consists of multiple strips fixedly installed on the bottom surface of the air box 420. The heat-conducting strip 430 is provided in the gap between the second heat dissipation fins 182. The heat-conducting strip 430 has a notch 431 at the position of the adjusting rod 183, so that the heat-conducting strip 430 can pass over the adjusting rod 183 and extend into the gap between the second heat dissipation fins 182.

[0068] During the impact process, the accelerometer vibrates, causing the bellows 420 to shake up and down. When the bellows 420 shakes, it compresses the gas inside, which facilitates the flow of gas inside the housing 190. During the up and down movement of the bellows 420, the heat conduction strip 430 will also come into contact with the second heat dissipation fin 182. The contact between the heat conduction strip 430 and the second heat dissipation fin 182 will transfer heat, which can improve the heat dissipation effect of the second heat dissipation fin 182.

[0069] Furthermore, such as Figure 7 As shown, the acceleration sensor also includes a housing 190, and the body 100 is fixedly disposed in the housing 190. The housing 190 has an air inlet 191 and an air outlet 192 respectively on its two sides corresponding to the liquid inlet 110 and the liquid outlet 120. An exhaust fan 193 is fixedly disposed on the housing 190 at the position corresponding to the air outlet 192.

[0070] The acceleration sensor also includes a first temperature sensor, a second temperature sensor, and a controller. The first temperature sensor is disposed inside the body 100, and the second temperature sensor is disposed inside the balloon 310. The first temperature sensor, the second temperature sensor, the electric push rod 320, and the exhaust fan 193 are all connected to the controller.

[0071] The temperature inside the body 100 and the balloon 310 is detected by the first temperature sensor and the second temperature sensor. The first temperature sensor and the second temperature sensor transmit the detected temperature information to the controller, which controls the electric push rod 320 and the exhaust fan 193 to work, so that the hot air inside the shell 190 can be dissipated as soon as possible, and the temperature inside the shell 190 is too high, which will affect the heat dissipation effect of the first heat dissipation fin 210 and the second heat dissipation fin 182.

[0072] Specifically, in practical applications, a heat dissipation method for an accelerometer is provided, applied to the aforementioned accelerometer, and the specific method is as follows:

[0073] The first temperature sensor and the second temperature sensor respectively detect the temperature information inside the body 100 and the balloon 310, and transmit the temperature information to the controller.

[0074] The controller receives temperature information detected by the first temperature sensor and the second temperature sensor, and compares the temperature information detected by the first temperature sensor and the second temperature sensor.

[0075] Set the temperature threshold of the first temperature sensor and the temperature difference threshold between the first temperature sensor and the second temperature sensor;

[0076] When the temperature detected by the first temperature sensor is greater than or equal to the temperature threshold, the controller sends an action signal to the electric actuator 320, and the electric actuator 320 starts working after receiving the action signal;

[0077] When the temperature detected by the first temperature sensor is greater than or equal to the temperature threshold, and the temperature difference between the first temperature sensor and the second temperature sensor is less than the temperature difference threshold, the controller sends an action signal to the exhaust fan 193 and the electric push rod 320 respectively. After receiving the action signal, the exhaust fan 193 and the electric push rod 320 start working.

[0078] When the temperature detected by the first temperature sensor is greater than or equal to the temperature threshold, and the temperature difference between the first temperature sensor and the second temperature sensor is greater than or equal to the temperature difference threshold, the controller sends a high-frequency action signal to the electric actuator 320, and the electric actuator 320 performs high-frequency operation after receiving the high-frequency action signal.

[0079] When the temperature detected by the first temperature sensor is lower than the temperature threshold, the electric actuator 320 and the exhaust fan 193 do not work.

[0080] By judging the temperature difference between the first and second temperature sensors, the current temperature status and heat dissipation effect of the accelerometer can be more accurately grasped. Then, the heat dissipation method can be quickly adjusted by the controller, so that the accelerometer can quickly dissipate heat from overheated parts, improving the accuracy of the accelerometer and extending its service life.

[0081] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0082] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. An accelerometer, comprising a body, wherein the interior of the body is a cavity filled with damping fluid, characterized in that: Also includes: An active heat dissipation mechanism includes a first heat dissipation fin and a heat dissipation pipe. An inlet and an outlet are respectively provided on two opposite sides of the main body. The two ends of the heat dissipation pipe are respectively connected to the inlet and the outlet. Several first heat dissipation fins are arranged on the heat dissipation pipe. A one-way valve is provided at both ends of the heat dissipation pipe. The extrusion mechanism includes a balloon, an electric actuator, and a pressure plate. The balloon is connected to the middle of the heat dissipation pipe, and the pressure plate is fixedly mounted on the top surface of the balloon. The telescopic end of the electric actuator is fixedly connected to the end face of the pressure plate. A base is fixedly mounted on the end face of the main body. The heat dissipation pipe is a corrugated pipe. The balloon is fixedly mounted on the base, and the first heat dissipation fins are fixedly mounted at the crests of the corrugated pipe. The extrusion mechanism also includes a first connecting rod and a second connecting rod. The corrugated pipe is connected to both ends of the balloon. A baffle is fixedly mounted in the middle of each corrugated pipe. A mounting block is fixedly mounted on the telescopic rod of the electric actuator. The first connecting rod is rotatably mounted on the mounting block. A synchronizing rod is fixedly connected between the two second connecting rods. One of the second connecting rods is located above the pressure plate, and the other second connecting rod passes through the base. Both ends of the second connecting rod are fixedly connected to the corresponding baffles. The other end of the first connecting rod is hinged to the middle of the second connecting rod near the liquid outlet. A first bracket is fixedly mounted on the top surface of the main body corresponding to the position of the base. A slide rail is fixedly mounted on the first bracket. The second connecting rod above the pressure plate is slidably mounted in the slide rail. A second bracket is fixedly mounted on the top surface of the main body corresponding to the position of the baffle. A retaining ring is fixedly mounted on the second bracket. A spring connects the baffle and the retaining ring. The accelerometer also includes a heat sink and thermally conductive gel. The heat sink is fixedly mounted on the end face of the main body. The thermally conductive gel is disposed between the first heat dissipation fins near the liquid outlet end. The thermally conductive gel is operably compressible and in contact with the heat sink. The heat sink is provided with a plurality of second heat dissipation fins. The second heat dissipation fin is hinged to the heat dissipation plate. An adjusting rod is hinged to the end of the second heat dissipation fin. The spherical balloon has push plates on both sides corresponding to the second heat dissipation fin. The push plates are slidably mounted on the heat dissipation plate. The end of the adjusting rod is slidably mounted on the push plates. The accelerometer also includes a housing, the main body of which is fixedly disposed within the housing. An auxiliary heat dissipation mechanism is fixedly disposed on the top surface of the housing. The auxiliary heat dissipation mechanism is disposed corresponding to the second heat dissipation fins on both sides of the balloon. The auxiliary heat dissipation mechanism includes: Mounting base, the mounting base is fixedly disposed on the top surface inside the housing, the mounting base is corresponding to the position of the second heat dissipation fin; A bellows, the top of which is fixedly connected to the mounting base; The heat-conducting strips are multiple strips fixedly installed on the bottom surface of the air box, and the heat-conducting strips are arranged corresponding to the gaps between the second heat dissipation fins.

2. The acceleration sensor as described in claim 1, characterized in that, The accelerometer also includes a housing, and the main body is fixedly installed in the housing. The housing has an air inlet and an air outlet on two sides corresponding to the liquid inlet and the liquid outlet, respectively. An exhaust fan is fixedly installed on the housing at the position corresponding to the air outlet.

3. The acceleration sensor as described in claim 2, characterized in that, The acceleration sensor also includes a first temperature sensor, a second temperature sensor, and a controller. The first temperature sensor is disposed inside the main body, and the second temperature sensor is disposed inside the balloon. The first temperature sensor, the second temperature sensor, the electric push rod, and the exhaust fan are all connected to the controller.

4. A heat dissipation method for an accelerometer, characterized in that, When applied to the accelerometer sensor described in claim 3, the specific method is as follows: The first temperature sensor and the second temperature sensor detect the temperature information inside the body and inside the balloon, respectively, and transmit the temperature information to the controller. The controller receives temperature information detected by the first temperature sensor and the second temperature sensor, and compares the temperature information detected by the first temperature sensor and the second temperature sensor. Set the temperature threshold of the first temperature sensor and the temperature difference threshold between the first temperature sensor and the second temperature sensor; When the temperature detected by the first temperature sensor is greater than or equal to the temperature threshold, the controller sends an action signal to the electric actuator, and the electric actuator starts working after receiving the action signal. When the temperature detected by the first temperature sensor is greater than or equal to the temperature threshold, and the temperature difference between the first temperature sensor and the second temperature sensor is less than the temperature difference threshold, the controller sends an action signal to the exhaust fan and the electric actuator respectively, and the exhaust fan and the electric actuator start working after receiving the action signal. When the temperature detected by the first temperature sensor is greater than or equal to the temperature threshold, and the temperature difference between the first temperature sensor and the second temperature sensor is greater than or equal to the temperature difference threshold, the controller sends a high-frequency action signal to the electric actuator, and the electric actuator performs high-frequency operation after receiving the high-frequency action signal. When the temperature detected by the first temperature sensor is lower than the temperature threshold, the electric actuator and exhaust fan will not work.

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