CN205539039U - Intelligent sensor - Google Patents

Abstract

The utility model relates to an intelligent sensor, its structure includes casing and the fixing base of connecting the casing, be equipped with contact pin and detection module on the fixing base, be equipped with sensing chip and output circuit among the detection module, a last hall probe, the 2nd hall probe, the 3rd hall probe and the probe circuit of being equipped with of sensing chip, a hall probe and the 2nd hall probe receive the differential signal, the 3rd hall probe receives and judges the signal, probe circuit is according to differential signal and judgement signal formation direction information, direction information passes through output circuit output. Its direction information and speed information that can independently detect and export the vehicle, and have the characteristics of high integrated, high accuracy and high stability.

Description

A kind of intelligence sensor

Technical field

This utility model relates to a kind of vehicle detection apparatus, particularly a kind of intelligence sensor.

Background technology

Traditional passive type abs sensor produces sinusoidal wave analog voltage by coil, magnetic conductor and Magnet to be believed Number, but when low speed (pinion rotation is slow), the amplitude of its output signal is less than the voltage that can be detected by Change, thus passive type abs sensor is in failure state when low speed；Therefore occur in that based on Hall unit The active type ABS sensor of part, this kind of sensor can export more stable voltage magnitude, can identify low Speed signal, but active type ABS sensor None-identified direction signal, cause vehicle feelings such as such as slipping by slope occur Cannot be found in time during condition.

China application publication number CN103808960A discloses a kind of rotating speed measuring rotating shaft and the device in direction And method, it is at strong and weak magnetic field two Hall elements of alternate location arrangements, when tachometer disc rotates, by it In the Hall element level conditions that another Hall element is in when being in saltus step judge rotation direction.But The program applies in vehicle ABS sensor that there are the following problems: 1, the phase para-position of two Hall elements Put and require too high thus drastically increase installation difficulty, and during vehicle is kept in motion, even if accurately pacifying Dress also cannot ensure that vehicle does not offsets in operation process, although if two Hall elements in theory The incomplete same direction signal that all can draw of saltus step within a cycle, but require that circuit adapts to not stop to become The hop period changed, its complexity can be substantially increased and stability also cannot ensure；2, conventional Hall sensor Precision relatively low and be easily disturbed, the detection numerical value of two Hall elements is separate, if in gear Certain tooth go wrong or wherein a Hall element by external interference, circuit cannot resoluting signal the most normal Consequently, it is possible to draw the opposite way round information.

Utility model content

Technical problem to be solved in the utility model is to provide a kind of intelligence sensor, and it can be with independent detection And export directional information and the velocity information of vehicle, and there is highly integrated, high accuracy and the feature of high stability.

This utility model solves above-mentioned technical problem and be the technical scheme is that

A kind of intelligence sensor, its structure includes housing and connects the fixing seat of housing, described fixing seat sets There are contact pin and detection module, described detection module is provided with induction chip and output circuit, described induction chip Being provided with the first hall probe, the second hall probe, the 3rd hall probe and probe circuit, described first suddenly You receive differential signal with the second hall probe by probe, and described 3rd hall probe receives and judges signal；Described Probe circuit is according to differential signal and judges that signal forms directional information, and described directional information passes through output circuit Output.Intelligence sensor by arrange on induction chip the first hall probe, the second hall probe, the 3rd Hall probe is also connected by probe circuit, makes intelligence sensor by adjusting the spacing between itself and signal wheel i.e. Can complete the judgement in direction, it is not necessary to adjust the position relationship between multiple probe again, convenience is installed and will not be at car Motor process affects testing result because thinking by a small margin；By arranging the first hall probe and second suddenly Your probe forms the differential signal judgement signal again with the 3rd hall probe and compares, and improves the voltage amplitude of signal Value, it is ensured that the precision of speed and readable range, and decrease disturbed condition.

Further, described 3rd hall probe is arranged on the road between the first hall probe and the second hall probe In footpath.3rd hall probe is arranged between path the overall volume reducing chip, and ensure that judgement signal Identical saltus step is not formed with differential signal.

As preferably, described 3rd hall probe is arranged on the road between the first hall probe and the second hall probe Footpath central point.3rd hall probe is arranged on path center promise circuit just can obtain outgoing direction in half period Information.

As preferably, the spacing range between described first hall probe and the second hall probe is 2.5～5mm. Setting, winding displacement and the signal of effect of distance the 3rd hall probe between the first hall probe and the second hall probe Wheel spacing, selection 2.5～5mm is the most suitable.

Further, described probe circuit includes direction analog-digital converter and digital circuit, described differential signal With judge that signal forms directional information after direction analog-digital converter and digital circuit.Described judgement signal and difference Sub-signal average is passed through direction analog-digital converter and is believed by forming direction after digital circuit digitized after comparing Breath is sent out and is forwarded to output coder, carries out information transmission by contact pin and external device.

As preferably, described digital circuit exports two kinds of different square waves of ripple width as directional information, described side The ripple of ripple is wide to be all higher than equal to 90 μ s, and the wide difference of ripple of two kinds of square waves is more than or equal to 90 μ s.For convenience of directional information Reading ripple is wide and the wide poor setting of ripple should be greater than equal to 90 μ s.

Further, described probe circuit also includes speed A/D converter and digital circuit, and described difference is believed Form velocity information number after speed A/D converter and digital circuit.Speed A/D converter and digital circuit Can be by the wavelength ripple frequency output speed information of differential signal.

As preferably, described probe circuit also includes filtering circuit and amplifying circuit, and described differential signal passes through Velocity information is formed after filter and amplification.Differential signal forms standard block after filtering and amplifying, and improves signal Precision.

As preferably, described output circuit is provided with electric capacity.Electric capacity is provided for protecting induction chip.

This utility model compared with the existing technology has the following advantages and effect: intelligence sensor is by sensing First hall probe, the second hall probe, the 3rd hall probe are set on chip and are connected by probe circuit, Make intelligence sensor can complete the judgement in direction by adjusting the spacing between itself and signal wheel, it is not necessary to adjust again Position relationship between multiple probes, convenience is installed and will not be because being thought and shadow by a small margin in vehicle motor process Ring testing result；Close by arranging the position of the first hall probe, the second hall probe and the 3rd hall probe System makes the structure of induction chip the most reasonable and stability is higher；The change of detectable signal and circuit makes intelligence biography Sensor has the feature of high accuracy and high stability, thus is applicable to vehicle detection.

Accompanying drawing explanation

In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below by right In embodiment or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that below, Accompanying drawing in description is only embodiments more of the present utility model, for those of ordinary skill in the art, On the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.

Fig. 1 is structural representation of the present utility model.

Fig. 2 is circuit diagram of the present utility model.

Fig. 3 is the structural representation of induction chip.

Fig. 4 is induction chip coordinates schematic diagram with signal is taken turns.

Fig. 5 is the structural representation of probe circuit.

Fig. 6 a is signal output waveform during gear ring left-hand rotation.

Fig. 6 b is signal output waveform during gear ring right-hand rotation.

Label declaration:

Housing 1 fixes seat 2 contact pin 3

Induction chip 4 first hall probe 41 second hall probe 42

3rd hall probe 43 signal wheel 5

Detailed description of the invention

Being described in further detail this utility model below in conjunction with embodiment, following example are to this reality With novel explanation, this utility model is not limited to following example.

Embodiment 1:

As it is shown in figure 1, the present embodiment is by housing 1, fixing seat 2, contact pin 3, induction chip 4 and circuit group Becoming, wherein circuit includes probe circuit and output circuit.Contact pin 3 and induction chip 4 are solid by fixing seat 2 Determine and be connected on housing 1, wherein welding with contact pin 3 after induction chip 4 bending, fixing seat 2 and contact pin 3 Model be Sumitomo 6188-4797.As in figure 2 it is shown, circuit forms letter by induction chip 4 and probe circuit Number and exported by output circuit, the wherein resistance Rm=75 Ω/5W in output circuit, electric capacity C=1nF/1000V.

Fig. 3 is to as described in 4, and induction chip 4 is provided with first hall probe the 41, second hall probe 42 and 3rd hall probe 43, the first hall probe 41 and the second hall probe 42 are at a distance of 2.5mm, the 3rd Hall Probe 43 is arranged on the center between the first hall probe 41 and the second hall probe 42, the 3rd hall probe 43 The ideal position long limit away from induction chip 4 be 1.44mm, the broadside away from induction chip 4 is 2.67mm. Induction chip 4 is arranged on signal and takes turns at 5 air gaps 1～3mm when operating, makes induction chip 4 take turns 5 with signal Perpendicular tangent line and the first hall probe the 41, second hall probe 42 and the 3rd hall probe 43 central point Connect formed straight line parallel so that induction chip 4 can detectable signal wheel 5 rotation information.Sense Answer the probe circuit structure on chip 4 as it is shown in figure 5, wherein the first hall probe 41 obtains signal L, the Two hall probes 42 obtain signal R, and the 3rd hall probe 43 obtains signal C, and forms difference by L, R Sub-signal also becomes direction signal X with signal C-shaped, and this process is that prior art is not described in detail in this, as passed through The average of comparison L and R and the relation of C: X=(L+R)/2-C define direction signal, and X passes through direction mould Number converter (direction A/D) enters digital circuit and carries out DSP digitized, during the phase place of signal is entered Directional information after row is analyzed and will be analyzed is forwarded to output coder, when signal wheel 5 is from the first hall probe 41 export (DR-L) signal when the second hall probe 42 rotates；Otherwise (DR-R) is turned right in output Signal, the most as shown in figure 6 a and 6b, (DR-L) signal that turns left is that high electric current is the square wave of 90 μ s and right Turn (DR-R) signal be high electric current be the square wave of 180 μ s, thus allow external equipment reading side by contact pin 3 To information.It addition, differential signal Negotiation speed analog-digital converter (speed A/D) that L, R are formed sends to The DSP digitized of circuit, digitized signal is output speed information after amplifying, filtering.

Furthermore, it is necessary to illustrate, the specific embodiment described in this specification, the shape of its parts and components Shape, be named title etc. can be different.All according to structure, feature and the principle described in this utility model inventional idea The equivalence done or simple change, be all included in the protection domain of this utility model patent.This utility model Described specific embodiment can be made various amendment or supplement by person of ordinary skill in the field Or use similar mode to substitute, without departing from structure of the present utility model or surmount the claims Defined scope, all should belong to protection domain of the present utility model.

Claims (9)

1. an intelligence sensor, including housing and the fixing seat of connection housing, described fixing seat is provided with slotting Pin and detection module, it is characterised in that: described detection module is provided with induction chip and output circuit, described Induction chip is provided with the first hall probe, the second hall probe, the 3rd hall probe and probe circuit, institute Stating the first hall probe and the second hall probe receives differential signal, described 3rd hall probe receives and judges letter Number；Described probe circuit is according to differential signal and judges that signal forms directional information, and described directional information is passed through Output circuit exports.

Intelligence sensor the most according to claim 1, it is characterised in that: described 3rd hall probe sets Put in the path between the first hall probe and the second hall probe.

Intelligence sensor the most according to claim 2, it is characterised in that: described 3rd hall probe sets Put the path center point between the first hall probe and the second hall probe.

4. according to the arbitrary described intelligence sensor of claims 1 to 3, it is characterised in that: described first suddenly Spacing range between you probe and the second hall probe is 2.5～5mm.

Intelligence sensor the most according to claim 1, it is characterised in that: the described probe circuit side of including To analog-digital converter and digital circuit, described differential signal and judge that signal is through direction analog-digital converter and numeral Directional information is formed after circuit.

Intelligence sensor the most according to claim 5, it is characterised in that: described digital circuit output two The different square wave of kind of ripple width is as directional information, and the ripple of described square wave is wide to be all higher than equal to 90 μ s, two kinds of square waves The wide difference of ripple more than or equal to 90 μ s.

7. according to the intelligence sensor described in claim 5 or 6, it is characterised in that: described probe circuit is also Including speed A/D converter and digital circuit, described differential signal is through speed A/D converter and digital circuit Rear formation velocity information.

Intelligence sensor the most according to claim 7, it is characterised in that: described probe circuit also includes Filtering circuit and amplifying circuit, described differential signal forms velocity information after filtering and amplifying.

Intelligence sensor the most according to claim 1, it is characterised in that: described output circuit is provided with Electric capacity.