CN214223982U - Pendulum-type angle sensor and portal inclination detection device - Google Patents
Pendulum-type angle sensor and portal inclination detection device Download PDFInfo
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- CN214223982U CN214223982U CN202120340733.5U CN202120340733U CN214223982U CN 214223982 U CN214223982 U CN 214223982U CN 202120340733 U CN202120340733 U CN 202120340733U CN 214223982 U CN214223982 U CN 214223982U
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Abstract
The utility model provides a pendulum angle sensor and a portal inclination angle detection device, belonging to the technical field of industrial vehicles, comprising a base, a rotating shaft and a rotating shaft, wherein the rotating shaft is horizontally inserted into the base and is rotatably connected with the base; the pendulum bob is fixedly arranged at the front end of the rotating shaft, the gravity center of the pendulum bob is kept on a vertical plane passing through the rotating axis of the rotating shaft under the action of gravity, and the gravity center of the pendulum bob is deviated from the rotating axis of the rotating shaft by a preset distance; a magnet fixedly installed at the rear end of the rotating shaft; the circuit board, its fixed mounting is equipped with the response chip on the circuit board in the base rear side, and the response chip is just to the rotation angle that the magnet set up and is used for detecting the magnet, and the circuit board is according to the voltage signal that the rotation angle output of magnet corresponds the utility model has the advantages of simple and reasonable, installation convenient to use, the detection precision is higher.
Description
Technical Field
The invention belongs to the technical field of industrial vehicles, and particularly relates to a pendulum angle sensor and a portal inclination angle detection device for detecting the inclination angles of a portal and a vehicle body of an industrial vehicle.
Background
The industrial vehicles often have forward rollover and side rollover accidents in the use process, most of the industrial vehicles are not automatically controlled in forward rollover and side rollover during design at present, and the operation experience of a driver is more relied. In order to improve the operation safety of industrial vehicles, a plurality of industrial vehicle host plants begin to conduct research in the aspect, the stability of the industrial vehicles is intervened and controlled by detecting the forward inclination and the side inclination angle in the vehicle operation process, and the purpose of ensuring the use safety of the industrial vehicles in design is achieved, and meanwhile, GB/T38893-.
In order to control the stability of the vehicle during operation, a control system needs to acquire angle data, an angle sensor needs to be installed at a certain part of a vehicle body for acquiring the angle data, and most of sensors for detecting the angle at present adopt a digital potentiometer with voltage output.
For example, in a chinese patent No. ZL201410337881.6, entitled forklift mast tilt control device and forklift anti-tilt control method, a mechanical linkage structure is provided between a potentiometer and a tilt cylinder to detect the tilt angle of the mast.
However, the mechanical linkage structure is inconvenient to install and debug, the detection precision can be reduced due to more transmission links, the mechanical linkage structure is exposed outside, detection faults are easily caused due to external factors such as collision, and the reliability is poor.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a pendulum angle sensor which is simple and reasonable in structure, convenient to install and use and higher in detection precision.
The purpose of the invention can be realized by the following technical scheme: a pendulum angle sensor comprising:
the bearing is embedded into the base, and the rotating shaft is rotatably connected with the base through the bearing;
the pendulum bob is fixedly arranged at the front end of the rotating shaft, the gravity center of the pendulum bob is kept on a vertical plane passing through the rotating axis of the rotating shaft under the action of gravity, and the gravity center of the pendulum bob is deviated from the rotating axis of the rotating shaft by a preset distance;
a magnet fixedly installed at the rear end of the rotating shaft;
the circuit board is fixedly installed on the rear side of the base, an induction chip is arranged on the circuit board, the induction chip is arranged right opposite to the magnet and used for detecting the rotation angle of the magnet, and the circuit board outputs a corresponding voltage signal according to the rotation angle of the magnet.
As a further improvement of the present invention, the first pin of the sensing chip is connected to one end of a resistor R1, the other end of the resistor R1 is connected to a power supply, one end of the resistor R1, which is connected to the power supply, is further connected to one end of a capacitor C4, the other end of the capacitor C4 is grounded, the first pin of the sensing chip is further connected to one end of a capacitor C1, the other end of the capacitor C1 is grounded, the fifth pin of the sensing chip is connected to one end of a resistor R2, the other end of the resistor R2 is connected to an output terminal, one end of the resistor R2, which is connected to the output terminal, is further connected to one end of a capacitor C5, the other end of the capacitor C5 is grounded, the seventh pin of the sensing chip is grounded through a capacitor C3, and the eighth pin of the sensing chip is grounded.
As a further improvement of the invention, a rear groove is formed in the rear side of the base in a concave manner, the circuit board is embedded into the rear groove, the rear cover closes the rear groove, the rear end of the rotating shaft extends into the rear groove, and an electric wire connected with the circuit board is arranged on the side wall of the rear groove in a penetrating manner.
As a further improvement of the invention, the magnet is embedded in the rear end of the rotating shaft and is tightly matched with the rotating shaft.
As a further improvement of the invention, the magnets are arranged in a circle, and one half of the circle is an N pole, and the other half is an S pole.
As a further improvement of the invention, the pendulum bob comprises a circular ring part matched with the rotating shaft, and a fan-shaped part radially extends along the lower edge of the circular ring part.
As a further improvement of the invention, a set screw is radially inserted into the circular ring part, and the set screw is in threaded connection with the circular ring part and abuts against the rotating shaft.
As a further improvement of the invention, the front side of the base is also provided with a front cover in an attaching manner, the rear side of the front cover is recessed inwards to form a front groove for the swinging and dropping to move, and a sealing ring is also arranged between the front cover and the base.
The invention also provides a device for detecting the inclination angle of the portal frame, which comprises the pendulum angle sensor, wherein the base is arranged on the side surface of the portal frame, and the rotation axis of the rotating shaft is horizontally vertical to the side surface of the portal frame.
As a further improvement of the present invention, the circuit board output voltage varies linearly as the gantry rotates from a maximum reverse tilt angle to a maximum forward tilt angle.
Based on the technical scheme, the embodiment of the invention can at least produce the following technical effects:
1. after the base uses the axis of revolution of pivot to rotate certain angle as the center, the pendulum weighs down and can rotate under the action of gravity to make its focus be in same vertical plane all the time with the pivot axis of revolution, see with the base as the benchmark, it drives magnet reverse rotation certain angle to weigh down in other words to the pendulum, and the response chip on the circuit board is fixed because relative base, then can perceive this magnet turned angle, and output corresponding voltage signal. Because the different of absolute position between response chip and the magnet, just can output different voltage signal, consequently carry out analysis processes to the voltage signal of circuit board output, can learn the turned angle of base. Through the pendulum-type angle sensor of this application, can save the complicated mechanical linkage structure of potentiometre to satisfy different inclination and detect the demand, and it is convenient to install, detects the precision height.
2. The circuit board and the magnet are arranged in the rear groove of the base in a sealed mode, so that interference of the external environment can be reduced, and detection precision is guaranteed.
3. The front cover can play a role in protection, and the sealing ring can play waterproof and dustproof roles, so that the reliability of the sensor is ensured.
Drawings
FIG. 1 is a partial sectional view in front elevation of a preferred embodiment of the invention.
FIG. 2 is a left side half sectional view of a preferred embodiment of the present invention.
Fig. 3 is a state diagram when the gantry is not tilted.
Fig. 4 is a state diagram when the gantry is tilted.
FIG. 5 is a circuit diagram of a preferred embodiment of the present invention.
In the figure, 100, the base; 110. a rear groove; 120. a bearing; 200. a rotating shaft; 210. a boss; 300. swinging the pendant; 310. a circular ring part; 320. a sector; 330. tightening the screw; 400. a magnet; 500. a circuit board; 510. an induction chip; 520. an electric wire; 600. a rear cover; 700. a front cover; 710. a front groove; 720. a seal ring; 10. a gantry.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1 to 2, the pendulum type angle sensor includes a base 100, a rotating shaft 200 and two bearings 120 adapted to the rotating shaft 200 are horizontally inserted into the base 100, the two bearings 120 are respectively embedded into front and rear sides of the base 100, the rotating shaft 200 is rotatably connected to the base 100 through the two bearings 120, a pendulum 300 is installed at a front end of the rotating shaft 200, under the action of gravity, a center of gravity of the pendulum 300 is maintained on a vertical plane passing through a rotation axis of the rotating shaft 200, and the center of gravity of the pendulum 300 is shifted by a predetermined distance with respect to the rotation axis of the rotating shaft 200, a magnet 400 is fixedly installed at a rear end of the rotating shaft 200, a circuit board 500 is further fixedly installed at the rear side of the base 100, a sensing chip 510 is installed on the circuit board 500, the sensing chip 510 is directly opposite to the magnet 400 and is used for detecting a rotation angle of the magnet 400, and the circuit board 500 outputs a corresponding voltage signal according to the rotation angle of the magnet 400.
When the base 100 rotates a certain angle around the rotation axis of the rotating shaft 200, the pendulum 300 rotates under the action of gravity, so that the center of gravity and the rotation axis of the rotating shaft 200 are always in the same vertical plane, and when the base 100 is used as a reference, the pendulum 300 drives the magnet 400 to rotate reversely by a certain angle, and the sensing chip 510 on the circuit board 500 is fixed relative to the base 100, and can sense the rotation angle of the magnet 400 and output a corresponding voltage signal. Since different voltage signals can be output due to different absolute positions between the sensor chip 510 and the magnet 400, the rotation angle of the base 100 can be obtained by analyzing and processing the voltage signals output by the circuit board 500. Through the pendulum-type angle sensor of this application, can save the complicated mechanical linkage structure of potentiometre to satisfy different inclination and detect the demand, and it is convenient to install, detects the precision height.
As shown in fig. 5, the sensing chip 510 may be an MLX90360 three-axis position sensing chip packaged by SOIC-8, the first pin of the sensing chip 510 is connected to one end of a resistor R1, the other end of the resistor R1 is connected to a power supply, one end of the resistor R1, which is connected to the power supply, is also connected to one end of a capacitor C4, the other end of the capacitor C4 is grounded, the first pin of the sensing chip 510 is further connected to one end of a capacitor C1, the other end of the capacitor C1 is grounded, the fifth pin of the sensing chip 510 is connected to one end of a resistor R2, the other end of the resistor R2 is connected to an output end, one end of the resistor R2, which is connected to the output end, is also connected to one end of a capacitor C5, the other end of the capacitor C5 is grounded, the seventh pin of the sensing chip 510 is grounded through a capacitor C3, and the eighth pin of the sensing chip 510 is grounded, so that the circuit board 500 can accurately detect the reliable rotation angle of the pendulum 300.
The MLX90360 can sense the absolute position of the magnet 400 facing the MLX from 0 to 360 ° and can be programmed to set the corresponding output voltages at different positions, for example, as shown in fig. 2, when the base 100 is at the maximum reverse deflection position, the circuit board 500 outputs a voltage of 2.5V when the circuit board 500 outputs a voltage of 0V, and when the base 100 is at the maximum forward deflection position, the circuit board 500 outputs a voltage of 5V.
In addition, a rear groove 110 is formed in the rear side of the base 100, the circuit board 500 is embedded in the rear groove 110, the rear cover 600 closes the rear groove 110, the rear end of the rotating shaft 200 extends into the rear groove 110, and the side wall of the rear groove 110 is provided with a wire 520 connected with the circuit board 500 in a penetrating manner. The circuit board 500 and the magnet 400 are sealed in the rear groove 110 of the base 100, so that the interference of the external environment can be reduced, and the detection precision can be ensured.
For the installation of making things convenient for magnet 400, magnet 400 embedding pivot 200 rear end and with pivot 200 tight fit, wherein magnet 400 is circular setting and circular shape half be the N utmost point, and half be the S utmost point for magnetism is felt line and is distributed evenly, and it is more accurate that induction chip 510 perception magnet 400 rotates, and then improves and detects the precision.
The pendulum bob 300 comprises a circular ring part 310 matched with the rotating shaft 200, and a fan-shaped part 320 extends along the lower edge of the circular ring part 310 along the radial direction, so that the pendulum bob 300 with the structure can swing smoothly, and the detection sensitivity can be ensured.
In order to facilitate the installation of the pendulum bob 300, the ring portion 310 is radially inserted with the set screw 330, the set screw 330 is screwed with the ring portion 310 and abuts against the rotating shaft 200, and the sensor is more convenient to assemble, disassemble and debug.
It should be mentioned that a front cover 700 is further attached to the front side of the base 100, a front groove 710 for the pendulum 300 to move is formed in the back side of the front cover 700, and a sealing ring 720 is further disposed between the front cover 700 and the base 100. The front cover 700 can play a role in protection, and the sealing ring 720 can play a role in water prevention and dust prevention, so that the reliability of the sensor is ensured.
As shown in fig. 3 to 4, the present invention further provides a device for detecting a tilt angle of a gantry, comprising the above-mentioned pendulum type angle sensor, wherein the base 100 of the pendulum type angle sensor is installed at a side of the gantry 10, and the rotation axis of the rotating shaft 200 is horizontally perpendicular to the side of the gantry 10.
When the gantry 10 tilts forward by the angle α, the base 100 is driven to tilt forward by the angle α, the pendulums 300 are kept in the original state under gravity, and the base 100 is used as a reference, which is equivalent to the pendulums 300 driving the magnet 400 to rotate backward by the angle α, so that the circuit board 500 can output corresponding voltage signals, and the tilt angle of the gantry 10 can be known after the voltage signals are analyzed and processed, thereby realizing the function of detecting the tilt angle of the gantry 10.
It is worth mentioning that when the mast 10 rotates from the maximum reverse tilt angle to the maximum forward tilt angle, the output voltage of the circuit board 500 varies linearly, so as to realize the real-time monitoring of the tilt angle of the mast 10.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (10)
1. A pendulum angle sensor, comprising:
the bearing is embedded into the base, and the rotating shaft is rotatably connected with the base through the bearing;
the pendulum bob is fixedly arranged at the front end of the rotating shaft, the gravity center of the pendulum bob is kept on a vertical plane passing through the rotating axis of the rotating shaft under the action of gravity, and the gravity center of the pendulum bob is deviated from the rotating axis of the rotating shaft by a preset distance;
a magnet fixedly installed at the rear end of the rotating shaft;
the circuit board is fixedly installed on the rear side of the base, an induction chip is arranged on the circuit board, the induction chip is arranged right opposite to the magnet and used for detecting the rotation angle of the magnet, and the circuit board outputs a corresponding voltage signal according to the rotation angle of the magnet.
2. A pendulum angle sensor according to claim 1, wherein: the first pin of response chip links to each other with resistance R1 one end, the power is connected to the resistance R1 other end, electric capacity C4 one end is still connected to the one end that resistance R1 connects the power, electric capacity C4 other end ground connection, the first pin of response chip still links to each other with electric capacity C1 one end, electric capacity C1 other end ground connection, the fifth pin of response chip links to each other with resistance R2 one end, the output is connected to the resistance R2 other end, electric capacity C5 one end is still connected to the one end that resistance R2 connects the output, electric capacity C5 other end ground connection, the seventh pin of response chip passes through electric capacity C3 ground connection, the eighth pin ground connection of response chip.
3. A pendulum angle sensor according to claim 1, wherein: the base rear side is recessed to form the back groove, and the circuit board embedding back groove, back lid closed back groove, and the pivot rear end stretches into the back inslot, and the electric wire that links to each other with the circuit board is worn to establish by the back groove lateral wall.
4. A pendulum angle sensor according to claim 1, wherein: the magnet is embedded in the rear end of the rotating shaft and is tightly matched with the rotating shaft.
5. A pendulum angle sensor according to claim 1, wherein: the magnet is circular setting and circular half is the N utmost point, and another half is the S utmost point.
6. A pendulum angle sensor according to claim 1, wherein: the pendulum bob comprises a circular ring part matched with the rotating shaft, and a fan-shaped part radially extends along the lower edge of the circular ring part.
7. The pendulum angle sensor of claim 6, wherein: and a set screw is radially inserted into the circular ring part and is in threaded connection with the circular ring part and abuts against the rotating shaft.
8. A pendulum angle sensor according to claim 1, wherein: the base front side still laminates and is provided with the protecgulum, and the indent forms the front groove that supplies the pendulum to weigh down the activity in the protecgulum rear side, still is provided with the sealing washer between protecgulum and the base.
9. The utility model provides a portal frame inclination detection device which characterized in that: comprising a pendulum angle sensor according to any of claims 1-8, said base being mounted to the side of the gantry and the axis of rotation of the shaft being horizontally perpendicular to the side of the gantry.
10. The apparatus for detecting a tilt angle of a door frame according to claim 9, wherein: when the gantry rotates from the maximum reverse inclination angle to the maximum forward inclination angle, the output voltage of the circuit board changes linearly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120340733.5U CN214223982U (en) | 2021-02-05 | 2021-02-05 | Pendulum-type angle sensor and portal inclination detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120340733.5U CN214223982U (en) | 2021-02-05 | 2021-02-05 | Pendulum-type angle sensor and portal inclination detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214223982U true CN214223982U (en) | 2021-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120340733.5U Active CN214223982U (en) | 2021-02-05 | 2021-02-05 | Pendulum-type angle sensor and portal inclination detection device |
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| Country | Link |
|---|---|
| CN (1) | CN214223982U (en) |
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2021
- 2021-02-05 CN CN202120340733.5U patent/CN214223982U/en active Active
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