CN2929651Y

CN2929651Y - Inclination sensor

Info

Publication number: CN2929651Y
Application number: CN 200620200260
Authority: CN
Inventors: 钟涛; 倪巡; 周震; 马菱
Original assignee: SHANGHAI RUIKE SPORTS GOODS CO Ltd
Current assignee: SHANGHAI RUIKE SPORTS GOODS CO Ltd
Priority date: 2006-03-15
Filing date: 2006-03-15
Publication date: 2007-08-01
Anticipated expiration: 2016-03-15

Abstract

A leaned sensor is formed of a Hall element, swinging magnetic steel and a shell body, wherein a weight is equipped inside the shell body, the magnetic steel is equipped on the weight, the weight can swing freely within a certain range of the shell body, and the linear Hall element is equipped inside the shell body. Since the effect of earth gravity, the weight is always vertical to the horizon, so when the equipping surface of the sensor and the horizon are in a certain angle, the Hall element has a bias relative to the magnetic steel, the voltage or resistance exported by the Hall element changes, thereby detecting the leaned condition and outputting an on-off signal by comparing the circuit or the switch Hall element itself. The technological feature of the utility model is that swinging free magnetic steel contained weight force-swinging structure and a Hall magnetic sensing technology are adopted and sealed inside the shell body with a simple structure, a low cost, uneasy to be destroyed, a high reliability and a long using life, which can be used for a leaning sensor.

Description

A kind of inclination sensor

Technical field

The utility model is a kind of angle of bank measurement sensor, belongs to electronic technology.Use this sensor can be in gravity field in 0 ~ ± 90 ° of scope, send switching signal in the certain tilt angle, can be used for tilting sensing and detection according to setting value.

Background technology

Development along with automatic technology, in building machinery, robot, medical health apparatus and the wheel Wheel-chair of riding instead of walk, keep correct set, steadily of centre of gravity, heeling condition is controlled and dangerous angle is reported to the police and limited, and the detection of heeling condition is indispensable.The inclination sensor of having developed at present has some forms such as taps formula, steel ball rolling type, photo-electric.But there is following weak point to some extent in existing tilt switch: (1), frangible.(2), angle is difficult for accurately control (3), poor repeatability, consistance is bad.(4), reliability and poor durability, use output characteristics variation after a period of time, cause the sensing error.(5), contact, loose contact are easily arranged.

Summary of the invention

The purpose of this utility model is the novel sensor that proposes a kind of tilt detection, this inclination sensor adopts Hall element and magnet steel, can be by a voltage comparator circuit at the arbitrarily angled switching value signal that provides, because not contact and friction between magnet steel and the Hall element is so the product of making has overcome the repeatability and all poor problem of consistance of existing product; Because the electric signal of output does not pass through electric contact, so there is not the problem of loose contact; Compare with mercury formula sensor, owing to there is not frangible glass, so do not exist frangible and problem such as mercury pollution.Be a kind of simple in structure, with low cost, safe and reliable contactless sensitive switch has shock resistance preferably, anti-vibration, can adapt to the varying environment requirement, and this sensor can satisfy the user detected and measured control to degree of tilt needs.

Scheme one of the present utility model is: adopt linear hall element and magnet steel to form inclination sensor, this magnet steel is installed on the weight, and weight is hung on stationary shaft by bearing, and the two ends of stationary shaft tightly are fixed in the housing.Magnet steel is an arc magnetic shoe, and N and S magnetic pole are distributed in the two ends of magnetic shoe extrados respectively.This piece magnet steel also can substitute with two, with the extremely relative two ends that are placed in the lower camber side of weight of the N utmost point with S, be connected with a voltage comparator ic 1A in Hall component output, the reference voltage of this voltage comparator can be regulated by potentiometer W, by regulating reference voltage, the arbitrarily angled switching signal of sending that can be in sensing range.

Scheme two of the present utility model is: adopt switching Hall components and two blocks of magnet steel to form inclination sensor, these two blocks of magnet steel are installed on the weight, and weight is hung on stationary shaft by bearing, and the two ends of stationary shaft tightly are fixed in the housing.Two blocks of magnet steel are placed in the two ends of the lower camber side of weight, the direct output switching signal of Hall element respectively.The spacing of regulating two blocks of magnet steel just can be made the inclination sensor of different angles.

Description of drawings

Provide the detailed description of the utility model below in conjunction with accompanying drawing.

Fig. 1, Fig. 2 are principle schematic of the present utility model.

Fig. 3 is the synoptic diagram of sensor when being in clockwise extreme position.

Fig. 4 is the synoptic diagram of sensor when being in counterclockwise extreme position.

Fig. 5, Fig. 6 are the principle schematic of the relative magnet steel of two polarity of employing.

Fig. 7 is circuit theory diagrams.

Fig. 8 is the Fundamentals of Sensors synoptic diagram that adopts the switch Hall element.

Fig. 9, Figure 10 are the synoptic diagram of sensor when being in clockwise and counterclockwise two kinds of obliquities respectively.

In Fig. 1, Fig. 2, (1) housing, (2) bearing, (3) axle, (4) weight, (5) magnet steel, (6) Hall element, (7) vibration damping spring, (5) regulate bolt, (6) base plate.

Embodiment

Scheme one is a preferred embodiment of the present utility model, by linear hall element with can swing magnet steel and constitute sensor, sees Fig. 1, Fig. 2.Be connected to a voltage comparator and switch output circuit in the back of sensor, see Fig. 7.As seen, dispose weight in the sensor from Fig. 1, Fig. 2, magnet steel is installed on this weight, and weight can freely swing in the certain limit in housing, and linear hall element is installed on the housing of sensor.Owing to be subjected to gravitational effect weight all the time perpendicular to the level ground, therefore when installed surface during horizontal by certain angle linear hall element produce between with respect to magnet steel and be offset, voltage by linear hall element output changes, this magnitude of voltage, be proportional to the pitch angle of this sensor, thereby detect the angle of inclination about the level ground.Back at sensor is connected to voltage comparator circuit, integrated circuit (IC) 1A is a voltage comparator, R2, R3, W are composed in series reference voltage circuit, the end of R3 is connected on the power Vcc, the other end links to each other with an end of potentiometer, and one of R2 terminates at the low reference point of power supply, and the other end links to each other with the other end of potentiometer, the variable tap end of potentiometer links to each other with the inverting input of comparer, and this reference voltage circuit provides the reference power supply that can change for comparer; R4 is a feedback resistance, is connected across between the output and homophase input pin of comparer, makes comparer produce hysteresis characteristic, prevents the output jitter of critical point; Triode V1 forms output switch circuit, outwards provides switching signal to the power supply reference point in OC door mode; R5 is connected between the base stage of the output terminal of comparer and triode, and comparer provides input current to make its conducting by R5 to triode; C1 is a power supply filter capacitor, and R1 is the input resistance of comparer.

When sensor was in Fig. 1, Fig. 2 and horizontal level shown in Figure 7, the lower camber side center of weight faced linear hall element, and the magnetic field at this center is close to 0, when the power supply that offers Hall element is 5V voltage, and the about 2.5V of hall element output voltage; When sensor was in clockwise extreme position shown in Figure 3, the S utmost point magnet steel on the weight faced linear hall element, and the magnetic field at this place is close to negative maximal value, when the power Vcc that offers Hall element is 5V voltage, and the about 0.9V of hall element output voltage; When sensor was in counterclockwise extreme position shown in Figure 4, the N utmost point magnet steel on the weight faced linear hall element, and the magnetic field at this place is close to positive maximal value, when the power Vcc that offers Hall element is 5V voltage, and the about 4.2V of hall element output voltage.When sensor was between counterclockwise extreme position and the mid point, the N utmost point section magnet steel on the weight was facing to linear hall element, when the power Vcc that offers Hall element is 5V voltage, the hall element output voltage value at 2.5V between the 4.2V.When sensor was between clockwise extreme position and the mid point, the S utmost point section magnet steel on the weight was facing to linear hall element, when the power Vcc that offers Hall element is 5V voltage, the hall element output voltage value at 0.9V between the 2.5V.

This shows, in whole tilting procedure, Hall element corresponding all the time an ad-hoc location on the magnet steel, thereby export different voltage.If W is set in 3V, when sensor was in counterclockwise certain angle a, the voltage of Hall element output made the in-phase input end voltage of comparer be higher than end of oppisite phase voltage greater than 3V, comparer output high level, triode V1 conducting.When sensor less than counterclockwise this angle a of state, perhaps be in horizontality, when perhaps being in clockwise state, the output voltage of Hall element is all less than 3V, the in-phase end voltage of comparer is all less than end of oppisite phase voltage, the comparer output low level, and triode V1 ends.Like this conducting by triode with end, the switching signal of set angle outwards is provided.

When the angular range that detects hour, Fig. 5, Fig. 6 adopt two blocks of relative magnet steel of polarity to replace the arc magnet steel among Fig. 1, Fig. 2 to have identical detection effect.

This programme two is by the switch Hall element and can swings magnet steel and constitute sensor, sees Fig. 8.Less with respect to the angle of inclination of horizontal level when sensor, Hall element is between two blocks of magnet steel, and Hall element does not have signal output; When the angle of inclination of sensor increases to when making magnet steel face Hall element clockwise or counterclockwise, see Fig. 9, Figure 10, the hall element output voltage signal has so just constituted the twocouese inclination sensor.A magnet steel only is installed, is just constituted folk prescription to gradient sensor.Regulate magnet steel and just can make the inclination sensor of different angles with respect to the distance of weight vertical line.

Claims

1. inclination sensor, it is characterized in that: Hall element (6) is fixed on the housing (1), magnet steel (5) is installed on the weight (4), weight (4) can freely swing in the certain limit in housing (1), magnet steel (5) can be the arc magnetic shoe, also can be with two blocks of magnet steel that polarity is relative, can also be with a magnet steel.