CN201340250Y

CN201340250Y - Hall-effect gear sensor

Info

Publication number: CN201340250Y
Application number: CNU2009200380594U
Authority: CN
Inventors: 徐振华; 孙克翔; 朱学敏
Original assignee: Nanjing New Zhongxu Microelectronics CO Ltd
Current assignee: Nanjing New Zhongxu Microelectronics CO Ltd
Priority date: 2009-01-09
Filing date: 2009-01-09
Publication date: 2009-11-04
Anticipated expiration: 2019-01-09

Abstract

The utility model provides a Hall-effect gear sensor. A copper ring (11) is injection-molded in a plastic shell (4), a socket connector lead needle (6) is injection-molded in a plastic bracket (5), a steel ball (7) is arranged in the plastic bracket (5), a magnetic steel (2) is arranged at one end of the plastic bracket (5) near a Hall integrated circuit (1), and the Hall integrated circuit (1) is arranged in the right center of the end face of the Hall-effect gear sensor; the opposite positions of the magnetic steel (2) and the Hall integrated circuit (1) are fixed, and the Hall integrated circuit (1) is connected with the socket connector lead needle (6) by a circuit board (3); the Hall integrated circuit (1), the magnetic steel (2), the circuit board (3), partial plastic bracket (5), the socket connector lead needle (6) and the steel ball (7) are arranged in the plastic shell (4); and an epoxy resin (5) is filled in the plastic shell (4). The Hall-effect gear sensor has the characteristics that the installation is simple, output voltage which is constant has no relationships with the installation distance as well as the rotating speed, and the frequency presents a square wave which is changed along with the changing of the rotating speed of a gear disc.

Description

The Hall effect gear sensor

Technical field

The utility model relates to a kind of Hall effect gear sensor, relates in particular to the sensor of a kind of measured automobiles diesel motor crank position, camshaft location and its rotating speed.

Background technology

What be used at present on the diesel motor measuring bent axle and camshaft is magnetoelectric sensor, and this sensor is output as sine wave, and its output amplitude increases with its rotating speed and to strengthen and detect distance close and increase, and output amplitude is from 0.5V-100V.Clearly sort signal is unfavorable for signal Processing, must be converted to square wave and just can calculate.And this sensor bothers when installing very much, and its signal output amplitude changes with distance.

The utility model content

1, technical matters to be solved:

At above deficiency, the utility model provides a kind of installation simple, and output voltage and mounting distance and rotating speed are irrelevant, and output voltage is a steady state value, and frequency is with a kind of Hall effect gear sensor of toothed disc rotation speed change.

2, technical scheme:

The utility model comprises that Hall integrated circuit 1, magnet steel 2, wiring board 3, plastic casing 4, plastic stent 5, connector draw pin 6, steel ball 7, copper ring 11; Copper ring 11 is injection-moulded in the plastic casing 4; Connector draws pin 6 and is injection-moulded in the plastic stent 5; Steel ball 7 is contained in the plastic stent 5; The plastic stent 5 that magnet steel 2 is contained in is near an end of Hall integrated circuit 1; Hall integrated circuit 1 is at the positive center of this Hall effect gear sensor end face; Magnet steel 2 is fixed with Hall integrated circuit 1 relative position, and Hall integrated circuit 1 draws pin 6 with connector and links to each other by wiring board 3; Hall integrated circuit 1, magnet steel 2, wiring board 3, partly plastic support 5, connector draw pin 6, steel ball 7 is positioned at plastic casing 4; Be filled with epoxy resin 10 in the plastic casing 4, plastic stent 5 is provided with the groove 8 that O-ring seal is housed, and plastic casing 4 is provided with the groove 9 that O-ring seal is housed; Hall integrated circuit 1 is formed the interface unit circuit by three pipe leg S1, S2, S3 and resistance R 1, resistance R 2, capacitor C 1, capacitor C 2, diode D, stabilivolt Z; Hall integrated circuit pipe leg S1 and power vd D (1) series diode D resistance R 1; Hall integrated circuit pipe leg S1 and ground GND (2) shunt regulator tube Z and capacitor C 1; Hall integrated circuit pipe leg S1 and Hall integrated circuit pipe leg S3 resistance in series R2; Ground GND (2) and Hall integrated circuit pipe leg S3 series capacitance C2; Hall integrated circuit pipe leg S2 directly links to each other with ground GND (2); Resistance R 2 is a pull-up resistor; Capacitor C 2, capacitor C 1 are filter capacitor.

3, beneficial effect:

Install simply, output voltage and mounting distance and rotating speed are irrelevant, and output voltage is a steady state value, and frequency is with the square wave of toothed disc rotation speed change.Improved the feasibility of reliability of products and production.

Description of drawings

Fig. 1 is circuit theory diagrams of the present utility model;

Fig. 2 is a structural drawing of the present utility model;

Fig. 3 is a scheme of installation of the present utility model.

Embodiment

The utility model utilizes the Hall IC of magnetic bias accurately to measure moving of class ferrous metal.Circuit that the Hall IC band of particular design separates and biasing magnet steel are sealed in the plastic casing of probe form.Its ultimate principle is: a gap (see figure 3) is arranged between Hall effect gear sensor and the engine relative distance, apart from d is 0-2.5mm, when class ferrous metal object is arranged in the external world near sensor, the magnetic field that sensor presets changes, the magnetic flux change in magnetic field reaches certain value, and Hall integrated circuit is changed to low level from high level; But when class ferrous metal object leaves sensor, the magnetic flux change in magnetic field reaches certain value, Hall integrated circuit is changed to high level from low level, as above repeatedly, sensor output signal is a square wave. sensor draws pin, steel ball, O-ring seal, epoxy resin and copper ring by Hall integrated circuit, magnet steel, wiring board, resistance, electric capacity, stabilivolt, diode, plastic casing, plastic stent, connector and forms.

Among Fig. 1,1 is Hall integrated circuit, and Hall integrated circuit is formed the interface unit circuit by three pipe leg S1, S2, S3 and resistance R 1, resistance R 2, capacitor C 1, capacitor C 2, diode D, stabilivolt Z.Hall integrated circuit pipe leg S1 and power vd D (1) series diode D resistance R 1.Hall integrated circuit pipe leg S1 and ground GND (2) shunt regulator tube Z and capacitor C 1.Hall integrated circuit pipe leg S1 and Hall integrated circuit pipe leg S3 resistance in series R2.Ground GND (2) and Hall integrated circuit pipe leg S3 series capacitance C2.Hall integrated circuit pipe leg S2 directly links to each other with ground GND (2).Diode D plays polarity protection.Resistance R 1 and stabilivolt Z play the surge protection.Resistance R 2 is a pull-up resistor.Capacitor C 2, capacitor C 1 are filter capacitor.

Among Fig. 2,1 is Hall integrated circuit, and 2 is magnet steel, and 3 is wiring board, and 4 is plastic casing, and 5 is plastic stent, and 6 for connector draws pin, and 7 is steel ball, and 8 is the groove of plastic stent, and 9 is the groove of plastic casing, and 10 is epoxy resin, and 11 is copper ring.

Copper ring 11 is installing and locating holes, is injection-moulded in the plastic casing 4; Connector draws pin 6 and is injection-moulded in the plastic stent 5; On the groove 8 of plastic stent O-ring seal is housed; Steel ball 7 is contained in the plastic stent 5; The plastic stent 5 that magnet steel 2 is contained in is near an end of Hall integrated circuit 1; Hall integrated circuit 1 is at the positive center of the utility model end face; Magnet steel 2 is fixed with Hall integrated circuit 1 relative position, and Hall integrated circuit 1 draws pin 6 with connector and links to each other by wiring board 3; Hall integrated circuit 1, magnet steel 2, wiring board 3, partly plastic support 5, connector draw pin 6, steel ball 7 is positioned at plastic casing 4; Be filled with epoxy resin 10 in the plastic casing 4; The groove 9 that plastic casing 4 is provided with plastic casing is equipped with O-ring seal.

Though the utility model with preferred embodiment openly as above; but they are not to be used for limiting the utility model; anyly have the knack of this skill person; in the spirit and scope that do not break away from the utility model; can do various variations or retouching from working as, what therefore protection domain of the present utility model should be defined with the application's claim protection domain is as the criterion.

Claims

1, a kind of Hall effect gear sensor is characterized in that: comprise that Hall integrated circuit (1), magnet steel (2), wiring board (3), plastic casing (4), plastic stent (5), connector draw pin (6), steel ball (7), copper ring (11); Copper ring (11) is injection-moulded in the plastic casing (4); Connector draws pin (6) and is injection-moulded in the plastic stent (5); Steel ball (7) is contained in the plastic stent (5); The plastic stent (5) that magnet steel (2) is contained in is near an end of Hall integrated circuit (1); Hall integrated circuit (1) is at the positive center of this Hall effect gear sensor end face; Magnet steel (2) is fixed with Hall integrated circuit (1) relative position, and Hall integrated circuit (1) draws pin (6) with connector and links to each other by wiring board (3); Hall integrated circuit (1), magnet steel (2), wiring board (3), partly plastic support (5), connector draw pin (6), steel ball (7) is positioned at plastic casing (4); Be filled with epoxy resin (10) in the plastic casing (4).

2, Hall effect gear sensor according to claim 1 is characterized in that: plastic stent (5) is provided with the groove (8) that O-ring seal is housed.

3, Hall effect gear sensor according to claim 1 is characterized in that: plastic casing (4) is provided with the groove (9) that O-ring seal is housed.

4, Hall effect gear sensor according to claim 1 is characterized in that: Hall integrated circuit (1) is formed the interface unit circuit by three pipe leg S1, S2, S3 and resistance R 1, resistance R 2, capacitor C 1, capacitor C 2, diode D, stabilivolt Z; Hall integrated circuit pipe leg S1 and power vd D (1) series diode D resistance R 1; Hall integrated circuit pipe leg S1 and ground GND (2) shunt regulator tube Z and capacitor C 1; Hall integrated circuit pipe leg S1 and Hall integrated circuit pipe leg S3 resistance in series R2; Ground GND (2) and Hall integrated circuit pipe leg S3 series capacitance C2; Hall integrated circuit pipe leg S2 directly links to each other with ground GND (2); Resistance R 2 is a pull-up resistor; Capacitor C 2, capacitor C 1 are filter capacitor.