CN209640364U - A kind of magnetoelectric tachometric measuring device of digital output - Google Patents
A kind of magnetoelectric tachometric measuring device of digital output Download PDFInfo
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- CN209640364U CN209640364U CN201822055928.6U CN201822055928U CN209640364U CN 209640364 U CN209640364 U CN 209640364U CN 201822055928 U CN201822055928 U CN 201822055928U CN 209640364 U CN209640364 U CN 209640364U
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Abstract
The utility model discloses a kind of magnetoelectric tachometric measuring devices of digital output, including shell, and armature, skeleton, permanent magnet, bushing, enameled wire, conducting wire, conditioning circuit plate and the cable of setting inside the housing, the skeleton is externally wrapped with enameled wire, through-hole is axially inside opened up, armature is set in through-hole；Permanent magnet is arranged in one end of the skeleton, and the armature passes through the end thereof contacts of skeleton and permanent magnet；Bushing is arranged in the other end of the permanent magnet；Conducting wire fairlead is also set up on the bushing and skeleton, the conducting wire and enameled wire terminal weld, and after winding on enamel wire coil, pass through skeleton and bushing, connect with difference conditioning circuit plate；The power supply line and signal wire of the conditioning circuit plate draw shell by cable.The utility model rotation-speed measuring device is small in size, light-weight, assembly process process is good, and output signal is digital signal, strong antijamming capability.
Description
Technical field
The utility model belongs to electron electric power technology, and in particular to a kind of magnetoelectric tachometric measuring device of digital output
Background technique
For aircraft during takeoff and landing, the speed of ground taxi is the important parameter for being related to aircraft safety.Due to
The speed of aircraft is directly proportional to wheel revolving speed when ground taxi, therefore, rotation-speed measuring device it is reliable whether, be directly related to winged
Safety during machine landing.Field of aviation measurement and test generally carries out wheel tachometric survey using magnetoelectric tachometric transducer, still
Magnetoelectric tachometric transducer volume weight is larger, assembly process process is poor, and signal processing is complicated, and output signal is sinusoidal signal,
Anti-interference ability is very poor, it is therefore desirable to develop a kind of miniaturization, lightweight, digital output rotation-speed measuring device.
Utility model content
The purpose of this utility model is to provide a kind of miniaturization, lightweight, digital output rotation-speed measuring device.
Realize the technical solution of the utility model aim are as follows: a kind of magnetoelectric tachometric measurement dress of digital output
It sets, including shell, and armature, skeleton, permanent magnet, bushing, enameled wire, conducting wire, the conditioning circuit plate of setting inside housings
And cable, the skeleton are externally wrapped with enameled wire, axially inside open up through-hole, armature is arranged in through-hole；The skeleton
One end be arranged permanent magnet, the armature pass through skeleton and permanent magnet end thereof contacts；Lining is arranged in the other end of the permanent magnet
Set；Conducting wire fairlead is also set up on the bushing and skeleton, the conducting wire and enameled wire terminal weld, on enamel wire coil
After winding, skeleton and bushing are passed through, is connect with difference conditioning circuit plate；The power supply line and signal wire of the conditioning circuit plate pass through
Cable draws shell.
As a kind of specific embodiment, the shell is an integral structure, and passes through sealant pouring and sealing.
As a kind of specific embodiment, the skeleton includes skeleton main body, end cap and permanent magnet fixing seat, middle skeleton
The diameter of section of main body is less than the internal diameter of shell, and the internal diameter gap of the outer diameter and shell of the end cap and permanent magnet fixing seat is matched
It closes, the internal diameter of the magnet fixing seat and the crest clearance of permanent magnet cooperate.
As a kind of more specific embodiment, the skeleton is an integral structure.
As a kind of more specific embodiment, groove is set on the side wall of the permanent magnet fixing seat.
As a kind of specific embodiment, fixing groove is arranged in the bushing, for the insertion and fixation of permanent magnet, outer diameter
With the internal diameter clearance fit of shell, the crest clearance of internal diameter and permanent magnet cooperates.
As a kind of specific embodiment, groove is arranged in the side wall of the bushing.
As a kind of specific embodiment, the conditioning circuit plate includes pressure limiting module, division module, differential amplification mould
Block, signal conversion module and signal conditioning module, wherein the output end of pressure limiting module and magnetic power rotation speed sensor connects, and being used for will
The output signal amplitude of magnetic power rotation speed sensor is limited in preset voltage range；Division module is used to divide by resistance value,
Realize single-ended bias voltage；Differential amplification module is connect with pressure limiting module and division module, for the output letter to pressure limiting module
It number amplifies；Signal conversion module is connect with differential amplification module and division module, and the input for carrying out double threshold is sluggish
Compare, realizes the conversion of signal；Signal conditioning module is connect with signal conversion module, for being filtered to converted signals,
Complete signal condition.
As a kind of more specific embodiment, the pressure limiting module includes first diode and the second diode, and the one or two
The anode of pole pipe connects the first input end of conditioning circuit with the cathode of the second diode, the cathode of first diode D1 and the
Second input terminal of the anode connection conditioning circuit of two diodes；
The division module includes second resistance and 3rd resistor, and wherein second resistance one end connects 5V power supply, the other end
Connect 3rd resistor and differential amplification module；The other end of 3rd resistor is grounded；
The differential amplification module includes first resistor, the 4th resistance, the 5th resistance, first capacitor and differential amplification fortune
It puts, wherein the second input terminal of first resistor one end connection conditioning circuit, the other end connect the homophase input of difference amplifier U1A
The connecting pin at end and division module second resistance and 3rd resistor；4th resistance one end connects the first input end of conditioning circuit,
The inverting input terminal and the 5th resistance of other end connection difference amplifier U1A；The other end of 5th resistance connects the defeated of difference amplifier
Outlet；The connecting pin of voltage termination the 5V power supply and first capacitor of difference amplifier, the other end ground connection of first capacitor, difference amplifier
Ground terminal ground connection；
The signal conversion module includes the 6th resistance, the 7th resistance and sluggish relatively amplifier, wherein the 6th resistance one end
Connect the output end of the difference amplifier of differential amplification module, the sluggish relatively amplifier non-inverting input terminal of other end connection and the 7th electricity
Resistance；The output end of the sluggish relatively amplifier of the other end connection of 7th resistance；The inverting input terminal of sluggishness relatively amplifier connects partial pressure
Module；
The signal conditioning module includes the 8th resistance and the second capacitor, wherein the 8th resistance one end connection signal modulus of conversion
The output end of the sluggish relatively amplifier of block, the other end connect conditioning circuit output end and the second capacitor；The other end of second capacitor
Ground connection.
The utility model compared with prior art, remarkable advantage are as follows: 1) the utility model housing bottom face is adopted with side
With integrated design, the glue after circuit board is solidified by enclosure interior is fixed, and does not need other special retention mechanisms, product knot
Structure is succinct, and assembly process process is good；2) the utility model opens up semi-circular groove in skeleton and excircle of bushing cylinder, alleviates product
Weight, provide space when couple by skeleton, permanent magnet, bushing with circuit board for conducting wire, can be avoided conducting wire and skeleton,
The friction of permanent magnet, bushing improves the resistance to shock and stable output signal of product, while also flowing from above to below and mentioning for glue
The useful space has been supplied, the abundant encapsulating encapsulation of product is conducive to；3) the utility model conducting wire and enameled wire terminal weld, and first exist
After being wound on enamel wire coil, it is then passed through skeleton and bushing, is connect with difference conditioning circuit plate, to the solder joint of conducting wire and enameled wire
Be effectively protected, reduce the stress that vibratory impulse environment descends on solder joint, improve product resistance to shock and
Stable output signal；4) sinusoidal signal is converted to square-wave signal by the difference conditioning circuit of circuit board by the utility model,
Convenient for the acquisition and processing of signal, while the conversion of the conditioning to small signal may be implemented, anti-interference ability enhancing.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model rotation-speed measuring device.
Fig. 2 is the structural schematic diagram of the utility model skeleton.
Fig. 3 is the structural schematic diagram of the utility model bushing.
Fig. 4 is the circuit diagram of the utility model circuit board.
Specific embodiment
Below with reference to specific the drawings and specific embodiments, the utility model is further illustrated.
As shown in Figure 1, the magnetoelectric tachometric measuring device of digital output includes shell 1, and it is arranged inside shell 1
Armature 2, skeleton 3, permanent magnet 4, bushing 5, enameled wire 6, conducting wire 7, conditioning circuit plate 8 and cable 9, the outside of the skeleton 3
Enameled wire 6 is wound, through-hole is axially inside opened up, armature 2 is set in through-hole；Permanent magnet 4 is arranged in one end of the skeleton 3,
The armature 2 passes through the end thereof contacts of skeleton 3 and permanent magnet 4；Bushing 5 is arranged in the other end of the permanent magnet 4；The bushing 5
With also set up conducting wire fairlead on skeleton 3, the conducting wire 7 is welded with 6 terminal of enameled wire, after being wound on 6 coil of enameled wire,
Across skeleton 3 and bushing 5, it is connect with difference conditioning circuit plate 8；The power supply line and signal wire of the conditioning circuit plate 8 pass through line
Cable 9 draws shell 1.
In some embodiments, the end cap of shell 1 and body design are integrated, later period sealant pouring and sealing, circuit board 8
It can be fixed by the glue of 1 solidified inside of shell, not need other special retention mechanisms.
In some embodiments, the structure of skeleton 3 is optimized, specific structure is as shown in Fig. 2, the skeleton 3 wraps
Skeleton main body, end cap and permanent magnet fixing seat are included, wherein end cap and the outer diameter of permanent magnet fixing seat are consistent with the internal diameter of shell 1,
The internal diameter of the magnet fixing seat is consistent with the outer diameter of permanent magnet 4, and the diameter of section of the skeleton main body is less than the interior of shell 1
Diameter.When completed knocked down products, 3 end cap of skeleton is close to the end face of shell 1, and enameled wire 6 and conducting wire are wrapped in skeleton body outer wall, armature 2
Across the through-hole through skeleton main body, end cap and permanent magnet fixing seat, contacted with the permanent magnet 4 of insertion permanent magnet fixing seat.
Skeleton can be designed as package assembly, but in order to simplify product installation procedure, guarantee the stability of product structure,
Skeleton structure can also be designed and be an integral structure.
In order to guarantee smoothly being pierced by for conducting wire, the friction of conducting wire 7 Yu skeleton 3, permanent magnet 4 is avoided, the antivibration of product is improved
Conducting wire punched out can be arranged in performance and stable output signal on the side wall of permanent magnet fixing seat, can also be by permanent magnet
Groove 10 is set on the side wall of fixing seat.Groove design alleviates the weight of product, not only provides sky for being pierced by for conducting wire 7
Between, it is a kind of preferred embodiment that the flowing of glue, which provides space, when also encapsulating for subsequent encapsulating.Fig. 2 illustrates four
Groove is evenly distributed with one week situation of permanent magnet fixing seat.In actual production, the quantity, size of groove and distribution the case where all may be used
To be adjusted.
Fixing groove is arranged in bushing 5, and convenient for the insertion and fixation of permanent magnet 4, outer diameter is consistent with the internal diameter of shell 1, internal diameter
It is consistent with the outer diameter of permanent magnet 4.In some embodiments, encapsulated for the ease of being pierced by for conducting wire 7 with the encapsulating in later period, meanwhile, it keeps away
The friction for exempting from conducting wire 7 Yu bushing 5 improves the resistance to shock and stable output signal of product, and groove is arranged in the side wall of bushing 5
10.Fig. 3 illustrates four grooves and is evenly distributed with 5 one weeks situations of bushing.In actual production, the quantity, size and distribution of groove
The case where can be carried out adjusting.
In order to which sinusoidal signal is preferably changed into square-wave signal, convenient for the acquisition and processing of signal, while realizing to small
The conditioning of signal is converted, and anti-interference ability is enhanced, and some embodiments optimize conditioning circuit board 8.As shown in figure 4, conditioning
Circuit board 8 includes pressure limiting module, division module, differential amplification module, signal conversion module and signal conditioning module.Wherein pressure limiting
Module is made of diode D1, D2, and division module is made of resistance R2 and resistance R3, and differential amplification module is by resistance R1, resistance
R5, resistance R4, capacitor C1 and differential amplification amplifier U1A composition, signal conversion module are compared by resistance R6, resistance R7 and sluggishness
Amplifier U1B composition, signal conditioning module are made of resistance R8 and capacitor C2；The input terminal of conditioning circuit is Vin1, Vin2, conditioning
The output end of circuit is OUT.
One end of resistance R4, Vin2 parallel connection limit are accessed after input terminal Vin1 parallel connection voltage limiting diode D1, D2 of conditioning circuit
One end of resistance R1,3 foot of non-inverting input terminal of the other end access differential amplifier U1A of R1 are accessed after pressure diode D1, D2；Electricity
Hinder 2 foot of inverting input terminal of the other end access differential amplifier U1A of R4,3 foot of the non-inverting input terminal access resistance R3 and electricity of U1A
The connecting pin of R2 is hindered, the other end of R2 accesses 5V power supply, the other end ground connection of R3；8 foot of voltage end of difference amplifier U1A meets 5V
The connecting pin of power supply and filter capacitor C1, the other end ground connection of C1,4 foot of the ground terminal ground connection of difference amplifier U1A.Difference amplifier
One end of 2 foot of the inverting input terminal access resistance R5 of U1A, 1 foot of output end of the other end access differential amplifier U1A of R5.Difference
One end of 1 foot of the output end access resistance R6 of amplifier U1A, the sluggish relatively amplifier U1B non-inverting input terminal 5 of the other end access of R6
The connecting pin of foot and resistance R7, the connecting pin of the access of 6 foot of inverting input terminal the resistance R2 and resistance R3 of sluggishness relatively amplifier U1B；
7 foot of output end of the other end of resistance R7 amplifier U1B compared with sluggish connects.Sluggishness relatively 7 foot of output end of amplifier U1B and electricity
R8 connection is hindered, the other end of R8 is connect with conditioning circuit output end OUT, and output end OUT is connect with filter capacitor C2, and C2's is another
End ground connection.
The specific work process of conditioning circuit is as follows:
Magnetoelectricity revolution speed sensing output signal accesses conditioning circuit by Vin1 and Vin2, is inhibited by the input mode of difference
The common mode interference of sensor output and the crosstalk couplings of conditioning circuit；It simultaneously will by two Schottky diodes D1 and D2
Sensor output signal amplitude is limited in very low voltage range, prevents the high-amplitude threshold voltage under high revolving speed situation to rear end electricity
The damage on road.
Differential amplification amplifier U1A and resistance R4, resistance R5 constitute differential amplifier circuit, and front end magnetic power rotation speed sensor is defeated
The small signal that the small signal or Schottky diode entered is clamped down on amplifies, avoid because circuit couple generate interference signal or
The subsequent small signal hysteresis of influence of noise compares, to improve the anti-interference ability of small signal condition.
Sluggishness relatively amplifier U1B and resistance R6, resistance R7 constitute hysteresis comparator circuit, by one there is sluggish winding to pass
The comparator of defeated characteristic realizes that the input sluggishness of double threshold compares, and avoids the limit of the simple gate due to caused by noise or interference voltage
The output of voltage comparator is unstable, substantially increases anti-interference ability.
First-order filtering is carried out by resistance R8 and filter capacitor C2 in the output end of hysteresis comparator, realizes that conditioning circuit is defeated
Signal is reliable and stable out；In conditioning circuit, realize that single-ended bias voltage, circuit structure are simple by resistance value partial pressure.
Claims (9)
1. a kind of magnetoelectric tachometric measuring device of digital output, which is characterized in that including shell (1), and be arranged in shell
The internal armature (2) of body (1), skeleton (3), permanent magnet (4), bushing (5), enameled wire (6), conducting wire (7), conditioning circuit plate (8)
With cable (9), the skeleton (3) is externally wrapped with enameled wire (6), axially inside opens up through-hole, armature is arranged in through-hole
(2)；Permanent magnet (4) are arranged in one end of the skeleton (3), and the armature (2) passes through a termination of skeleton (3) and permanent magnet (4)
Touching；Bushing (5) are arranged in the other end of the permanent magnet (4)；Conducting wire fairlead, institute are also set up on the bushing (5) and skeleton (3)
It states conducting wire (7) and enameled wire (6) terminal welds, after winding on enameled wire (6) coil, pass through skeleton (3) and bushing (5),
It is connect with difference conditioning circuit plate (8)；The power supply line and signal wire of the conditioning circuit plate (8) draw shell by cable (9)
(1)。
2. magnetoelectric tachometric measuring device according to claim 1, which is characterized in that the shell (1) is integral type knot
Structure passes through sealant pouring and sealing.
3. magnetoelectric tachometric measuring device according to claim 1, which is characterized in that the skeleton (3) includes skeleton master
Body, end cap and permanent magnet fixing seat, the diameter of section of middle skeleton main body are less than the internal diameter of shell (1), the end cap and permanent magnetism
The outer diameter of body fixing seat and the internal diameter clearance fit of shell (1), between the internal diameter of the magnet fixing seat and the outer diameter of permanent magnet (4)
Gap cooperation.
4. magnetoelectric tachometric measuring device according to claim 3, which is characterized in that the skeleton is an integral structure.
5. magnetoelectric tachometric measuring device according to claim 3, which is characterized in that the side wall of the permanent magnet fixing seat
Upper setting groove (10).
6. magnetoelectric tachometric measuring device according to claim 1, which is characterized in that fixing groove is arranged in the bushing (5),
For the insertion and fixation of permanent magnet (4), the internal diameter clearance fit of outer diameter and shell (1), the outer diameter of internal diameter and permanent magnet (4)
Clearance fit.
7. magnetoelectric tachometric measuring device according to claim 1, which is characterized in that the side wall of the bushing (5) is arranged
Groove (10).
8. magnetoelectric tachometric measuring device according to claim 1, which is characterized in that the conditioning circuit plate (8) includes
Pressure limiting module, division module, differential amplification module, signal conversion module and signal conditioning module, wherein pressure limiting module and magnetoelectricity
The output end of speed probe connects, for the output signal amplitude of magnetic power rotation speed sensor to be limited in preset voltage range
It is interior；Division module is used to divide by resistance value, realizes single-ended bias voltage；Differential amplification module and pressure limiting module and division module
Connection, amplifies for the output signal to pressure limiting module；Signal conversion module and differential amplification module and division module connect
It connects, the input sluggishness for carrying out double threshold compares, and realizes the conversion of signal；Signal conditioning module and signal conversion module connect
It connects, for being filtered to converted signals, completes signal condition.
9. magnetoelectric tachometric measuring device according to claim 8, which is characterized in that the pressure limiting module includes the one or two
Pole pipe (D1) and the second diode (D2), the anode of first diode (D1) connect conditioning electricity with the cathode of the second diode (D2)
The of the anode connection conditioning circuit of the first input end Vin1 on road, the cathode of first diode (D1) and the second diode (D2)
Two input terminal Vin2；
The division module includes second resistance (R2) and 3rd resistor (R3), and wherein connection 5V in second resistance one end (R2) is electric
Source, the other end connect 3rd resistor (R3) and differential amplification module；The other end of 3rd resistor (R3) is grounded；
The differential amplification module include first resistor (R1), the 4th resistance (R4), the 5th resistance (R5), first capacitor (C1) and
Differential amplification amplifier (U1A), wherein the second input terminal Vin2 of first resistor one end (R1) connection conditioning circuit, the other end connect
3 foot of non-inverting input terminal of difference amplifier (U1A) and the connecting pin of division module second resistance (R2) and 3rd resistor (R3)；4th
Resistance one end (R4) connects the first input end Vin1 of conditioning circuit, and the other end connects the inverting input terminal 2 of difference amplifier (U1A)
Foot and the 5th resistance (R5)；1 foot of output end of other end connection difference amplifier (U1A) of 5th resistance (R5)；Difference amplifier
(U1A) 8 foot of voltage end connects the connecting pin of 5V power supply and first capacitor (C1), the other end ground connection of first capacitor (C1), difference
4 foot of ground terminal of amplifier (U1A) is grounded；
The signal conversion module includes that the 6th resistance (R6), the 7th resistance (R7) and sluggishness compare amplifier (U1B), wherein the 6th
Resistance one end (R6) connects 1 foot of output end of the difference amplifier (U1A) of differential amplification module, the sluggish relatively amplifier of other end connection
(U1B) 5 foot of non-inverting input terminal and the 7th resistance (R7)；The other end connection of 7th resistance (R7) sluggish relatively amplifier (U1B)
7 foot of output end；6 foot of inverting input terminal of sluggishness relatively amplifier (U1B) connects division module；
The signal conditioning module includes the 8th resistance (R8) and the second capacitor (C2), wherein the 8th resistance one end (R8) connection letter
7 foot of output end of sluggish relatively amplifier (U1B) of number conversion module, the other end connect the electricity of conditioning circuit output end OUT and second
Hold (C2)；The other end of second capacitor (C2) is grounded.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822055928.6U CN209640364U (en) | 2018-12-09 | 2018-12-09 | A kind of magnetoelectric tachometric measuring device of digital output |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822055928.6U CN209640364U (en) | 2018-12-09 | 2018-12-09 | A kind of magnetoelectric tachometric measuring device of digital output |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444453A (en) * | 2018-12-09 | 2019-03-08 | 中国航空工业集团公司上海航空测控技术研究所 | A kind of magnetoelectric tachometric measuring device of digital output |
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2018
- 2018-12-09 CN CN201822055928.6U patent/CN209640364U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109444453A (en) * | 2018-12-09 | 2019-03-08 | 中国航空工业集团公司上海航空测控技术研究所 | A kind of magnetoelectric tachometric measuring device of digital output |
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