CN206496726U - Absolute position measuring device and Medical Devices - Google Patents
Absolute position measuring device and Medical Devices Download PDFInfo
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- CN206496726U CN206496726U CN201621188128.6U CN201621188128U CN206496726U CN 206496726 U CN206496726 U CN 206496726U CN 201621188128 U CN201621188128 U CN 201621188128U CN 206496726 U CN206496726 U CN 206496726U
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Abstract
The present utility model application provides absolute position measuring device and Medical Devices.Absolute position measuring device includes：First absolute position transducer and the second absolute position transducer；First absolute position transducer, the second absolute position transducer are separately mounted on the afterbody transmission component of the driving-chain of tested moving component, wherein, first absolute position transducer is used for the rotation number of turns for measuring the second absolute position transducer, and the second absolute position transducer is used to measure this sensor when the absolute position of front ring.The application has reached the Absolute position measurement of low cost, high accuracy, wide scope.
Description
Technical field
The present utility model application is related to motion measurement technical field, and more particularly to absolute position measuring device and medical treatment is set
It is standby.
Background technology
For the Medical Devices with auto-action, absolute position sensing is a necessary funtion part.Every morning,
When doctor's activation system, each motion controller is firstly the need of the current location for detecting each moving component, because nobody knows
Whether these moving components of road are moved through after a loss of power, hereafter, and it could start working, drive motion components to purpose status
Put.Under normal circumstances, Absolute angular encoder is used for detecting the absolute position of a motion, or member of translational is exhausted
To the absolute position of position either rotary part.
Absolute position transducer is typically mounted on the afterbody power transmission shaft of the driving-chain of tested moving component.
If the gearratio of absolute position transducer and the afterbody drive of the driving-chain of tested moving component is k, then
If absolute position transducer measurement obtains the rotational angle of itself for θ, the afterbody transmission of the driving-chain of moving component is tested
The rotational angle θ of wheeloutIt is just θout=θ/k, the translation distance of tested moving component is：L=θ * d/2k, wherein, d is tested fortune
The diameter of the afterbody drive of the driving-chain of dynamic component.
As can be seen that being to obtain bigger θ to increase measurement rangeoutAnd L, there are two methods：
1st, reduction gearratio k.This means absolute position transducer needs bigger gear and smaller gear to export and drive
It is dynamic, but this will cause the reduction of Measurement Resolution, because Δ L=Δ θ * d/2k, Δ θout=Δ θ/k, in order to obtain higher survey
Accuracy of measurement, k can not be too small.
2nd, measurement range of the increase absolute position transducer to angle, θ.This, which means that, needs to use multi-turn position sensing
Device, but so cost can be far longer than use individual pen position sensor.However, in order to reach higher measurement accuracy, this is seemingly
Have to spend again.
At present, there are two kinds of conventional absolute position transducers：Potentiometer and encoder (including optical or magnetic), its
In：
Potentiometer, be essentially a slide-wire rheostat (here not include non-contact potentiometer because its principle and
Price is closer to encoder), it is relatively cheap, but is difficult to reach the very high degree of accuracy, because：High-precision measurement needs height
The sensor of resolution ratio, the signal cable that good analog-to-digital conversion circuit, good power quality are become reconciled is all these all inconvenient
Preferably.Therefore, it is the motion-sensing for being poorly suited for wide scope.Further, since using contact measurement method, being transported in long-time
After row, the linearity and precision of potentiometer can all decline.Contact measurement method also causes the mechanical trip of potentiometer to limit, this
Mean that it ad infinitum can not rotate to a direction；
Encoder, more more stable than potentiometer using contactless measurement, the life-span is longer, and without mechanical travel limit.
The output of encoder is typically data signal, so its robustness is stronger, can be easily reached high accuracy.But encoder is
Costly, especially multi-turn absolute position encoder, because it has complicated mechanical structure.
At present, in order to reach big measurement range, 2 position sensors are generally utilized more than, and it is exhausted to use multi-turn
To position coder, cost is higher.
Utility model content
To solve the above problems, the embodiment of the present application provides a kind of absolute position measuring device, to reduce absolute position survey
Measure cost；
The embodiment of the present application also provides a kind of Medical Devices, to reduce Absolute position measurement cost.
In order to achieve the above object, this application provides following technical scheme：
A kind of absolute position measuring device, the device includes：First absolute position transducer and the second absolute position sensing
Device；
First absolute position transducer, the second absolute position transducer are separately mounted to the driving-chain of tested moving component
On afterbody transmission component,
Wherein, the first absolute position transducer is used for the rotation number of turns for measuring the second absolute position transducer, and second is absolute
Position sensor is used to measure this sensor when the absolute position of front ring.
In one embodiment, first absolute position transducer and the second absolute position transducer are all individual pen absolute position
Sensor.
In one embodiment, the afterbody transmission component of the driving-chain of the tested moving component is driven including afterbody
Axle and/or afterbody drive.
In one embodiment, second absolute position transducer is encoder, and first absolute position transducer is volume
Code device or potentiometer.
In one embodiment, when the afterbody transmission component of the driving-chain of the tested moving component is passed including afterbody
When moving axis and afterbody drive, any in first absolute position transducer, second absolute position transducer
Individual to be connected by shaft coupling with the afterbody power transmission shaft of the driving-chain of the tested moving component, first absolute position is passed
Another in sensor, second absolute position transducer is engaged on the tested moving component by the first drive
On the afterbody drive of driving-chain；
Or, when the afterbody transmission component of the driving-chain of the tested moving component includes afterbody drive
When, first absolute position transducer, second absolute position transducer pass through the second drive, the 3rd drive respectively
On the afterbody drive for being engaged on the driving-chain of the tested moving component.
In one embodiment, when the afterbody transmission component of the driving-chain of the tested moving component is passed including afterbody
During moving axis,
The first chain wheel set and the second sprocket wheel are connected with the afterbody power transmission shaft of the driving-chain of the tested moving component
Group, first chain wheel set includes：First sprocket wheel and the second sprocket wheel and the chain of supporting installation, the second chain wheel set include：The
Three sprocket wheels and the 4th sprocket wheel and the chain of supporting installation, wherein, first sprocket wheel and the 3rd steering sprocket key are connected to most
On rear stage power transmission shaft, one in first absolute position transducer, second absolute position transducer and described the
Two steering sprocket keies are connected, and another in first absolute position transducer, second absolute position transducer is with described the
Four steering sprocket keies are connected；Or,
The 3rd chain wheel set, the 3rd chain wheel set are connected with the afterbody power transmission shaft of the driving-chain of the tested moving component
Including：5th sprocket wheel and the 6th sprocket wheel and the chain of supporting installation, wherein, the 5th steering sprocket key is connected to afterbody biography
On moving axis, one in first absolute position transducer, second absolute position transducer by shaft coupling with it is last
Primary transmission axle is connected, in first absolute position transducer, second absolute position transducer another with it is described
6th steering sprocket key is connected.
In one embodiment, when the afterbody transmission component of the driving-chain of the tested moving component is passed including afterbody
During moving axis,
The first synchronous pulley group and second are connected with the afterbody power transmission shaft of the driving-chain of the tested moving component
Synchronous pulley group, the first synchronous pulley group includes：First synchronous pulley and the second synchronous pulley and the timing belt of supporting installation,
Second synchronous pulley group includes：3rd synchronous pulley and the 4th synchronous pulley and the timing belt of supporting installation, wherein, described
One synchronous pulley and the 3rd synchronous pulley key are connected on afterbody power transmission shaft, first absolute position transducer,
One in second absolute position transducer is connected with the second synchronous pulley key, the first absolute position sensing
Another in device, second absolute position transducer is connected with the 4th synchronous pulley key；Or,
The 3rd synchronous pulley group is connected with the afterbody power transmission shaft of the driving-chain of the tested moving component, the 3rd is same
Step belt wheel group includes：5th synchronous pulley and the 6th synchronous pulley and the timing belt of supporting installation, wherein, the described 5th is synchronous
Belt wheel key is connected on afterbody power transmission shaft, in first absolute position transducer, second absolute position transducer
One be connected by shaft coupling with afterbody power transmission shaft, first absolute position transducer, second absolute position
Another in sensor is connected with the 6th synchronous pulley key.
A kind of Medical Devices, including any of the above-described described device.
In one embodiment, the Medical Devices are X-ray machine or CT machines.
In the embodiment of the present application, by installing two on the afterbody transmission component of the driving-chain of tested moving component
Individual pen absolute position transducer, one of sensor is used for the rotation number of turns for measuring another sensor, another sensor
For measuring this sensor when the absolute position of front ring, it is achieved thereby that the Absolute position measurement to being tested moving component, and
The Absolute position measurement of low cost, high accuracy, wide scope is reached.
Brief description of the drawings
The structural representation for the absolute position measuring device that Fig. 1 provides for the embodiment of the application one；
The structural representation for the absolute position measuring device that Fig. 2 provides for another embodiment of the application；
The structural representation for the absolute position measuring device that Fig. 3 provides for the another embodiment of the application；
The structural representation for the absolute position measuring device that Fig. 4 provides for the another embodiment of the application；
Fig. 5 for the driving-chain of output valve and the tested moving component of first and second individual pen absolute position transducer last
The relation schematic diagram of the angle of rotation angle value of level drive.
Wherein, reference is as follows：
Embodiment
In order that the object, technical solution and advantage of the application are more clearly understood, below in conjunction with the accompanying drawings and according to embodiment,
Technical scheme to the application is described in detail.
" one " and " described " of the singulative such as used in the description of the present application and appended claims
It is also intended to include plural form, unless present disclosure is clearly separately specified.
The absolute position measuring device that the embodiment of the present application is provided includes：First absolute position transducer and the second absolute position
Put sensor；
First absolute position transducer, the second absolute position transducer are separately mounted to the driving-chain of tested moving component
On afterbody transmission component,
Wherein, the first absolute position transducer is used for the rotation number of turns for measuring the second absolute position transducer, and second is absolute
Position sensor is used to measure this sensor when the absolute position of front ring.
In a particular application, the first absolute position transducer and the second absolute position transducer all pass for individual pen absolute position
Sensor.
In a particular application, being tested the afterbody transmission component of the driving-chain of moving component includes afterbody power transmission shaft
And/or afterbody drive.
In a particular application, the second absolute position transducer is single-ring encoder, and the first absolute position transducer is individual pen
Encoder or single-turn potentiometer.
Wherein, any one in the first absolute position transducer, the second absolute position transducer is by shaft coupling and is tested
In the afterbody power transmission shaft connection of the driving-chain of moving component, the first absolute position transducer, the second absolute position transducer
Another be engaged on by the first drive on the afterbody drive of the driving-chain of tested moving component, now, on
Stating the afterbody transmission component of the driving-chain of tested moving component includes afterbody power transmission shaft and afterbody drive；
Or, the first absolute position transducer, the second absolute position transducer pass through the second drive, the 3rd transmission respectively
Wheel is engaged on the afterbody drive of the driving-chain of tested moving component, now, the driving-chain of above-mentioned tested moving component
Afterbody transmission component refer only to afterbody drive.
Or, it is connected with the first chain wheel set and the second sprocket wheel on the afterbody power transmission shaft of the driving-chain of tested moving component
Group, the first chain wheel set includes：First sprocket wheel and the second sprocket wheel and the chain of supporting installation, the second chain wheel set include：3rd chain
Wheel and the 4th sprocket wheel and the chain of supporting installation, wherein, the first sprocket wheel and the 3rd steering sprocket key are connected to afterbody power transmission shaft
On, one in the first absolute position transducer, the second absolute position transducer is connected with the second steering sprocket key, the first absolute position
Another in sensor, the second absolute position transducer is connected with the 4th steering sprocket key, now, the biography of above-mentioned tested moving component
The afterbody transmission component of dynamic chain refers only to afterbody power transmission shaft；
Or, it is connected with the 3rd chain wheel set, the 3rd sprocket wheel on the afterbody power transmission shaft of the driving-chain of tested moving component
Group includes：5th sprocket wheel and the 6th sprocket wheel and the chain of supporting installation, wherein, the 5th steering sprocket key is connected on power transmission shaft, the
One in one absolute position transducer, the second absolute position transducer is connected by shaft coupling with power transmission shaft, the first absolute position
Another put in sensor, the second absolute position transducer is connected with the 6th steering sprocket key, now, above-mentioned tested moving component
The afterbody transmission component of driving-chain refers only to afterbody power transmission shaft.
Or, it is connected with the first synchronous pulley group and second on the afterbody power transmission shaft of the driving-chain of tested moving component
Synchronous pulley group, the first synchronous pulley group includes：First synchronous pulley and the second synchronous pulley and the timing belt of supporting installation,
Second synchronous pulley group includes：3rd synchronous pulley and the 4th synchronous pulley and the timing belt of supporting installation, wherein, first is same
Step belt wheel and the 3rd synchronous pulley key are connected on afterbody power transmission shaft, the first absolute position transducer, the second absolute position
One in sensor is connected with the second synchronous pulley key, in the first absolute position transducer, the second absolute position transducer
Another is connected with the 4th synchronous pulley key, now, and the afterbody transmission component of the driving-chain of above-mentioned tested moving component is only
Refer to afterbody power transmission shaft；
Or, it is connected with the 3rd synchronous pulley group, the 3rd on the afterbody power transmission shaft of the driving-chain of tested moving component
Synchronous pulley group includes：5th synchronous pulley and the 6th synchronous pulley and the timing belt of supporting installation, wherein, the 5th timing belt
Wheel key be connected on power transmission shaft, one in the first absolute position transducer, the second absolute position transducer by shaft coupling with
Power transmission shaft is connected, and another in the first absolute position transducer, the second absolute position transducer connects with the 6th synchronous pulley key
Connect, now, the afterbody transmission component of the driving-chain of above-mentioned tested moving component refers only to afterbody power transmission shaft.
The embodiment of the present application also provides a kind of Medical Devices, including any of the above-described described device.
Medical Devices can be X-ray machine or CT machines.
The application is described in detail below：
The absolute position measuring device that the embodiment of the present application is provided mainly includes：First absolute position transducer and second exhausted
To position sensor, in a particular application, the first absolute position transducer and the second absolute position transducer are all exhausted using individual pen
To position sensor.
Wherein, the second individual pen absolute position transducer does not have mechanical trip limitation, i.e. the second individual pen absolute position transducer
Can unrestrictedly it rotate in one direction, the first individual pen absolute position transducer can have mechanical travel limit not have
Mechanical trip is limited.
First individual pen absolute position transducer, the second individual pen absolute position transducer are separately mounted to tested moving component
The afterbody transmission component of driving-chain：On power transmission shaft and/or drive.
By the power source of equipment where tested moving component (such as：Engine) arrive movement output axle (such as：Tire) between
All transmission components of chain connection are referred to as driving-chain, and the afterbody transmission component of the driving-chain refers to the driving-chain most
The power transmission shaft and/or drive of end.For example：By taking automobile as an example, all transmission components between engine to tire are constituted
Driving-chain, the afterbody of driving-chain refers to the axle of tire and/or the drive of inside tires.
" the tested moving component " mentioned in the application had both included translational motion part or including rotating moving part no matter
It is translation or rotating moving part, the afterbody that first and second individual pen absolute position transducer is all mounted in driving-chain is passed
On dynamic component.
In actual applications, the second individual pen absolute position transducer can use single-ring encoder, the absolute position of the first individual pen
Single-turn potentiometer can also be used using single-ring encoder by putting sensor.
Wherein, the first individual pen absolute position transducer is used for the rotation number of turns for measuring the second individual pen absolute position transducer,
Second individual pen absolute position transducer is used to measure this sensor when the particular location of front ring, i.e. the second individual pen absolute position is passed
The maximum measurement range of sensor is a circle, and after a circle has been measured, its measured value can return to 0 and restart.
The transmission of moving component is being tested according to the first individual pen absolute position transducer, the second individual pen absolute position transducer
Mounting means on the afterbody transmission component of chain, provides each specific embodiment of the application：
The structural representation for the absolute position measuring device that Fig. 1 provides for the embodiment of the application one, wherein：
Any one in first individual pen absolute position transducer 11, the second individual pen absolute position transducer 21 (is the in Fig. 1
One individual pen absolute position transducer 11) axle pass through the afterbody power transmission shaft 31 of shaft coupling and the driving-chain of tested moving component
Connection, another (being the second individual pen absolute position transducer 21 in Fig. 1) is engaged on tested motion by the first drive 12
On the afterbody drive 41 of the driving-chain of part, i.e. the axle of another individual pen absolute position transducer and the first transmission
The connection of 12 keys is taken turns, the first drive 12 is engaged on the afterbody drive 41 of the driving-chain of tested moving component.
First drive 12, drive 41 for example can be gear.
The structural representation for the absolute position measuring device that Fig. 2 provides for another embodiment of the application, wherein：
First individual pen absolute position transducer 11, the second individual pen absolute position transducer 12 pass through the second drive respectively
13rd, the 3rd drive 14 is engaged on the afterbody drive 41 of the driving-chain of tested moving component, i.e. the first individual pen is absolute
The axle of position sensor 11 is connected with the key of the second drive 13, the axle and the 3rd drive of the second individual pen absolute position transducer 21
14 keys are connected, and the second drive 13, the 3rd drive 14 are engaged with drive 41.
Second drive 13, the 3rd drive 14 for example can be gear.
The structural representation for the absolute position measuring device that Fig. 3 provides for the another embodiment of the application, wherein：
Two chain wheel sets are connected with the afterbody power transmission shaft 31 of the driving-chain of tested moving component：First chain wheel set and
Second chain wheel set, the first chain wheel set includes：First sprocket wheel 51 and the second sprocket wheel 52 and the chain of supporting installation, the second chain wheel set
Including：3rd sprocket wheel 61 and the 4th sprocket wheel 62 and the chain of supporting installation, wherein, the first sprocket wheel 51 and the key of the 3rd sprocket wheel 61 connect
It is connected on power transmission shaft 31, (Fig. 3 in the first individual pen absolute position transducer 11, the second individual pen absolute position transducer 21
In be the first individual pen absolute position transducer 11) axle be connected with the key of the second sprocket wheel 52, the first individual pen absolute position transducer 11,
The axle and the 4th of another (being the second individual pen absolute position transducer 21 in Fig. 3) in the second individual pen absolute position transducer 21
The key of sprocket wheel 62 is connected.
The structural representation for the absolute position measuring device that Fig. 4 provides for the another embodiment of the application, wherein：
A chain wheel set is connected with the afterbody power transmission shaft 31 of the driving-chain of tested moving component：3rd chain wheel set,
3rd chain wheel set includes：5th sprocket wheel 71 and the 6th sprocket wheel 72 and the chain of supporting installation, wherein, the connection of the key of the 5th sprocket wheel 71
On power transmission shaft 31, one in the first individual pen absolute position transducer 11, the second individual pen absolute position transducer 21 is (in Fig. 4
For the first individual pen absolute position transducer 11) axle be connected by shaft coupling with power transmission shaft 31, the first individual pen absolute position sensing
The axle of another (being the second individual pen absolute position transducer 21 in Fig. 4) in device 11, the second individual pen absolute position transducer 21
It is connected with the key of the 6th sprocket wheel 72.
In actual applications, Fig. 3, the sprocket wheel shown in 4 can also replace with synchronous pulley, specific as follows：
Two synchronous pulley groups are connected with the afterbody power transmission shaft 31 of the driving-chain of tested moving component：First is synchronous
Belt wheel group and the second synchronous pulley group, the first synchronous pulley group include：First synchronous pulley and the second synchronous pulley and supporting
The timing belt of installation, the second synchronous pulley group includes：3rd synchronous pulley and the synchronization of the 4th synchronous pulley and supporting installation
Band, wherein, the first synchronous pulley and the 3rd synchronous pulley key are connected on power transmission shaft 31, the first individual pen absolute position transducer
11st, the axle of one in the second individual pen absolute position transducer 21 is connected with the second synchronous pulley key, the first individual pen absolute position
Another axle in sensor 11, the second individual pen absolute position transducer 21 is connected with the 4th synchronous pulley key.
Or, it is connected with a synchronous pulley group on the afterbody power transmission shaft 31 of the driving-chain of tested moving component：The
Three synchronous pulley groups, the 3rd synchronous pulley group includes：5th synchronous pulley and the synchronization of the 6th synchronous pulley and supporting installation
Band, wherein, the 5th synchronous pulley key is connected on power transmission shaft 31, and the first individual pen absolute position transducer 11, the second individual pen are absolute
The axle of one in position sensor 21 is connected by shaft coupling with power transmission shaft 31, the first individual pen absolute position transducer 11,
Another axle in two individual pen absolute position transducers 21 is connected with the 6th synchronous pulley key.
The application is applied to any equipment that there is Absolute position measurement demand, such as Medical Devices (X-ray machine or CT machines)
Or other equipment.
The concrete application example of the application given below：
This application example is by taking the structure of the absolute position measuring device shown in Fig. 2 as an example, first, second individual pen absolute position
Sensor represents that the gearratio of sensor1 and drive 41 is m, sensor2 and drive with sensor1, sensor2 respectively
41 gearratio is that n, i.e. drive 41 rotate a circle, and sensor1 input shaft rotates m circles, and sensor2 input shaft rotates n
Circle, m and n can be any value (can might be less that 1 more than 1) more than 0.
Sensor1 is used for the rotation number of turns for measuring sensor2.
Fig. 5 for sensor1, sensor output valve and drive 41 angle of rotation angle value relation schematic diagram, such as Fig. 5 institutes
Show, transverse axis represents the angle of rotation angle value of drive 41, the longitudinal axis is sensor1, sensor2 output valve, and the output valve can be
Magnitude of voltage or counted number of pulses, real skew lines therein represent sensor1 output valve and the angle of rotation of drive 41
The relation of angle value, imaginary broken line therein represents the relation of sensor2 output valve and the angle of rotation angle value of drive 41.For
Sensor2, when its output valve peaks, represents that sensor2 have rotated a circle, then output valve can quickly recover to 0.
As shown in figure 5, when drive 41 is moved to second place P2 from first position P1, sensor1 output valve from
First output valve s11 to second output valve s12, sensor2 output valve are then from the 3rd output valve s21 to the 4th output valve s22.
If m：N=1：When 10, i.e. sensor2 turn 10 circle, sensor1 turns 1 circle,
The maximum possible for setting sensor2 rotates number of turns MaxPossible_Turns of Sensor2 as 10 circles,
Sensor1 maximum output value Max_Value of Sensor1 are 4096 pulses, at a time, sensor1 reality
Output valve Actual_Value of Sensor1 are 676 pulses, then now sensor2 actual rotation number of turns Actual_
Turn is：
Actual_Turn=Int ((MaxPossible_Turns of Sensor2) * (Actual_Value of
Sensor1)/(Max_Value of Sensor1))
=Int (10*676/4096)
=Int (1.650390625)
=1
That is, sensor2 has turned 1.650390625 circles, it is, having turned 1 circle, is currently on the 2nd circle.
By further merging sensor1 data, the physical location Actual_ of drive 41 can be obtained
Position：
Actual_Position=(Actual_Turn) * (Max_Value of Sensor2)+(Actual_Value
of Sensor2)。
Wherein, Max_Value of Sensor2 are sensor2 maximum output value, Actual_Value of
Sensor2 is sensor2 real output value.
It should be noted that the output valve of individual pen absolute position transducer and the linear ratio of rotational angle of its output shaft
Example.The measurement stroke for such as assuming individual pen absolute position transducer is 1 circle, and exports maximum for 4096 pulses, then every
The corresponding angle of individual pulse is 0.087890625 ° of 360 °/4096 ≈, i.e. often one pulse of increase, equivalent to the output of sensor
Axle turns over 0.087890625 °.
The absolute position measuring device provided using the embodiment of the present application, measurement range (is tested the translation of moving component
Apart from L or rotational angle) only by sensor1 (i.e. the first individual pen absolute position transducer) and the driving-chain of tested moving component
The gearratio m decisions of afterbody drive, because：L=θout* d/2=(θ 1*d)/2m, wherein, L is tested moving component
Translation distance, θoutFor the rotational angle of the afterbody drive of the driving-chain of tested moving component, θ 1 turns for sensor1's
Dynamic angle, d is the diameter of the afterbody drive of the driving-chain of tested moving component.It can be seen that, m is smaller, and L measurement range is just
It is bigger.
In addition, sensor1 resolution ratio is inessential, because sensor1 effect is that (i.e. the second individual pen is exhausted by several sensor2
To position sensor) the rotation number of turns, the resolution ratio needed for sensor1 will determine by sensor2.
Measurement accuracy be by the driving-chain of sensor2 resolution ratio and sensor2 and tested moving component last
The gearratio n decisions of level drive, because：Δ L=(Δ θout* d)/2n, (Δ θ 2*d)/2n, wherein, θ 2 turns for sensor2's
Dynamic angle.It can be seen that, n is bigger, and measurement accuracy is higher.But n can not be excessive, because it influences whether the resolution ratio to sensor1
It is required that：Δθ1<(Max_Value of Sensor1) * m/n, otherwise sensor1 will be unable to accurate recording sensor2 turning collar
Number.
The embodiment of the present application has the beneficial effect that：
First, it is achieved that only by two individual pen absolute position transducers and the absolute position for being tested moving component is surveyed
Amount, has reached the Absolute position measurement of low cost, high accuracy, wide scope.
2nd, by selecting the gearratio of two sensors and the afterbody drive of the driving-chain of tested moving component,
Measurement range and measurement accuracy can be easily customized, and implementation can be with flexible and changeable.
The preferred embodiment of the application is the foregoing is only, not to limit the application, all essences in the application
God is with principle, and any modification, equivalent substitution and improvements done etc. should be included within the scope of the application protection.
Claims (9)
1. a kind of absolute position measuring device, it is characterised in that the absolute position measuring device includes：First absolute position is sensed
Device (11) and the second absolute position transducer (21)；
First absolute position transducer (11), the second absolute position transducer (21) are separately mounted to the transmission of tested moving component
On the afterbody transmission component of chain,
Wherein, the first absolute position transducer (11) is used for the rotation number of turns for measuring the second absolute position transducer (21), second
Absolute position transducer (21) is used to measure this sensor when the absolute position of front ring.
2. absolute position measuring device according to claim 1, it is characterised in that first absolute position transducer
(11) and the second absolute position transducer (21) all be individual pen absolute position transducer.
3. absolute position measuring device according to claim 1 or 2, it is characterised in that the biography of the tested moving component
The afterbody transmission component of dynamic chain includes afterbody power transmission shaft (31) and/or afterbody drive (41).
4. absolute position measuring device according to claim 1 or 2, it is characterised in that the second absolute position sensing
Device (21) is encoder, and first absolute position transducer (11) is encoder or potentiometer.
5. absolute position measuring device according to claim 3, it is characterised in that when the transmission of the tested moving component
When the afterbody transmission component of chain includes afterbody power transmission shaft (31) and afterbody drive (41), described first is absolute
Any one in position sensor (11), second absolute position transducer (21) passes through shaft coupling and the tested motion portion
Afterbody power transmission shaft (31) connection of the driving-chain of part, first absolute position transducer (11), the second absolute position
Another put in sensor (21) is engaged on the driving-chain of the tested moving component most by the first drive (12)
On rear stage drive (41)；
Or, when the afterbody transmission component of the driving-chain of the tested moving component includes afterbody drive (41)
When, first absolute position transducer (11), second absolute position transducer (21) pass through the second drive respectively
(13), the 3rd drive (14) is engaged on the afterbody drive (41) of the driving-chain of the tested moving component.
6. absolute position measuring device according to claim 3, it is characterised in that when the transmission of the tested moving component
When the afterbody transmission component of chain includes afterbody power transmission shaft (31),
The first chain wheel set and the second sprocket wheel are connected with the afterbody power transmission shaft (31) of the driving-chain of the tested moving component
Group, first chain wheel set includes：First sprocket wheel (51) and the second sprocket wheel (52) and the chain of supporting installation, the second chain wheel set
Including：3rd sprocket wheel (61) and the 4th sprocket wheel (62) and the chain of supporting installation, wherein, first sprocket wheel (51) and described
3rd sprocket wheel (61) key is connected on afterbody power transmission shaft (31), first absolute position transducer (11), described second
One in absolute position transducer (21) is connected with the second sprocket wheel (52) key, first absolute position transducer
(11), in second absolute position transducer (21) another is connected with the 4th sprocket wheel (62) key；Or,
The 3rd chain wheel set, the 3rd chain wheel set are connected with the afterbody power transmission shaft (31) of the driving-chain of the tested moving component
Including：5th sprocket wheel (71) and the 6th sprocket wheel (72) and the chain of supporting installation, wherein, the 5th sprocket wheel (71) the key connection
On afterbody power transmission shaft (31), first absolute position transducer (11), second absolute position transducer (21)
In one be connected by shaft coupling with afterbody power transmission shaft (31), first absolute position transducer (11), described
Another in two absolute position transducers (21) is connected with the 6th sprocket wheel (72) key.
7. absolute position measuring device according to claim 3, it is characterised in that when the transmission of the tested moving component
When the afterbody transmission component of chain includes afterbody power transmission shaft (31),
The first synchronous pulley group and second are connected with the afterbody power transmission shaft (31) of the driving-chain of the tested moving component
Synchronous pulley group, the first synchronous pulley group includes：First synchronous pulley and the second synchronous pulley and the timing belt of supporting installation,
Second synchronous pulley group includes：3rd synchronous pulley and the 4th synchronous pulley and the timing belt of supporting installation, wherein, described
One synchronous pulley and the 3rd synchronous pulley key are connected on afterbody power transmission shaft (31), the first absolute position sensing
One in device (11), second absolute position transducer (21) is connected with the second synchronous pulley key, and described first is exhausted
Another in position sensor (11), second absolute position transducer (21) is connected with the 4th synchronous pulley key
Connect；Or,
The 3rd synchronous pulley group is connected with the afterbody power transmission shaft (31) of the driving-chain of the tested moving component, the 3rd is same
Step belt wheel group includes：5th synchronous pulley and the 6th synchronous pulley and the timing belt of supporting installation, wherein, the described 5th is synchronous
Belt wheel key is connected on afterbody power transmission shaft (31), first absolute position transducer (11), second absolute position
One in sensor (21) is connected by shaft coupling with afterbody power transmission shaft (31), first absolute position transducer
(11), in second absolute position transducer (21) another is connected with the 6th synchronous pulley key.
8. a kind of Medical Devices, it is characterised in that including the absolute position measuring device as described in claim 1 to 7 is any.
9. Medical Devices according to claim 8, it is characterised in that the Medical Devices are X-ray machine or CT machines.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621188128.6U CN206496726U (en) | 2016-10-28 | 2016-10-28 | Absolute position measuring device and Medical Devices |
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| CN201621188128.6U CN206496726U (en) | 2016-10-28 | 2016-10-28 | Absolute position measuring device and Medical Devices |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108007418A (en) * | 2017-11-30 | 2018-05-08 | 国网江苏省电力有限公司检修分公司 | Based on gear-driven high voltage isolator transmission shaft corner measuring apparatus and method |
| CN110875672A (en) * | 2018-08-29 | 2020-03-10 | 斯凯孚线性驱动技术有限责任公司 | System for obtaining the position of a linear unit of a linear system |
| CN113639622A (en) * | 2021-07-29 | 2021-11-12 | 上海联影医疗科技股份有限公司 | Position sensor, position measuring method, position measuring device, and storage medium |
-
2016
- 2016-10-28 CN CN201621188128.6U patent/CN206496726U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108007418A (en) * | 2017-11-30 | 2018-05-08 | 国网江苏省电力有限公司检修分公司 | Based on gear-driven high voltage isolator transmission shaft corner measuring apparatus and method |
| CN110875672A (en) * | 2018-08-29 | 2020-03-10 | 斯凯孚线性驱动技术有限责任公司 | System for obtaining the position of a linear unit of a linear system |
| CN113639622A (en) * | 2021-07-29 | 2021-11-12 | 上海联影医疗科技股份有限公司 | Position sensor, position measuring method, position measuring device, and storage medium |
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