CN105333891A - Coding device and method and medical ward bed - Google Patents
Coding device and method and medical ward bed Download PDFInfo
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- CN105333891A CN105333891A CN201410390505.3A CN201410390505A CN105333891A CN 105333891 A CN105333891 A CN 105333891A CN 201410390505 A CN201410390505 A CN 201410390505A CN 105333891 A CN105333891 A CN 105333891A
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Abstract
The invention relates to a coding device and method and a medical ward bed. The coding device comprises a magnetic stripe group and a coil group, the magnetic stripe group further comprises a first magnetic stripe group and a second magnetic stripe, and the coil group comprises a first coil pair and a second coil pair; the first magnetic stripe group comprises N first magnetic stripes, N is an integer greater than 1, and the first end of the latter first magnetic stripe is connected with the second end of the former first magnetic stripe; the length of the first magnetic strip group is the same with that of the second magnetic stripe; and the first coil pair moves relative to the first magnetic stripe group, the second coil pair moves relative to the second magnetic stripe, the relative positions of the first and second coil pairs are fixed, and the relative positions of the first magnetic stripe group and the second magnetic stripe are fixed.
Description
Technical field
The present invention relates to a kind of code device, coding method and medical sickbed.
Background technology
For the consideration of security and operability, in the motion control of medical industry, often need the absolute position feedback of displacement of the lines.Existing magneto-electric absolute value circle scrambler realizes the absolute position encoder of individual pen by 90 degree orthogonal a pair Hall coils, then is realized the absolute position encoder of the number of turns by gear set deceleration, thus achieves the absolute position encoder of multi-turn.
At present, the magnetic induction chip being applied to linear movement measuring generally produces the position signalling of increment type by hall sensing.Hall subassembly, when moving along magnetic stripe direction, produces a sinusoidal signal, can obtain incremental position signal by interpolation.
But the precision of existing displacement of the lines absolute encoder device is lower, can not meet the demand of Medical Devices.
Summary of the invention
The problem that the present invention solves is that the precision of existing code device is lower.
For solving the problem, the embodiment of the present invention provides a kind of code device, comprising: magnetic stripe group and coil groups, and described magnetic stripe group comprises the first magnetic stripe group and the second magnetic stripe, described coil groups comprise the first coil to the second coil pair;
Described first magnetic stripe group comprises: N number of first magnetic stripe, N be greater than 1 integer, the first end of rear first magnetic stripe connects the second end of previous first magnetic stripe;
The length of described first magnetic stripe group is equal with the length of described second magnetic stripe;
Described first coil produces relative motion to being suitable for described first magnetic stripe group, described second coil produces relative motion to being suitable for described second magnetic stripe, described first coil pair and the right relative position of the second coil are fixed, and the relative position of described first magnetic stripe group and described second magnetic stripe is fixed.
Optionally, the first end of the 1st the first magnetic stripe in described first magnetic stripe group is relative with the first end of described second magnetic stripe, and the second end of last the first magnetic stripe is relative with the second end of described second magnetic stripe.
Optionally, described first coil is to comprising: the first coil and the second coil, and the length of described first magnetic stripe is the integral multiple of the distance of described first coil and the second coil.
Optionally, described second coil is to comprising: tertiary coil and the 4th coil, and the length of described second magnetic stripe is the integral multiple of the distance of described tertiary coil and the 4th coil.
Optionally, described first magnetic stripe group comprises 4 the first magnetic stripes, described first coil is to comprising: the first coil and the second coil, the length of described first magnetic stripe is 4 times of the distance of described first coil and the second coil, described second coil is to comprising: tertiary coil and the 4th coil, and the length of described second magnetic stripe is 4 times of the distance of described tertiary coil and the 4th coil.
Optionally, described first magnetic stripe is straight bar magnet or annular magnet, and described second magnetic stripe is straight bar magnet or annular magnet.
Optionally, described first magnetic stripe group is parallel with the second magnetic stripe.
The embodiment of the present invention also provides a kind of and utilizes above-mentioned code device to carry out the coding method of encoding, and comprising:
Make described first coil to the second coil to simultaneously producing relative motion with described first magnetic stripe group and the second magnetic stripe;
Obtain the primary importance numerical value that the magnitude of voltage right with described first coil is corresponding;
Obtain the second place numerical value that the magnitude of voltage right with described second coil is corresponding;
The accumulation result of described primary importance numerical value and second place numerical value is encoded as final position.
Optionally, described coding method also comprises:
Set up described first coil to the corresponding relation with the relative position value of described first magnetic stripe and the right magnitude of voltage of described first coil;
Set up described second coil to the corresponding relation with the relative position value of described second magnetic stripe and the right magnitude of voltage of described second coil.
Optionally, the primary importance numerical value that the magnitude of voltage that described acquisition is right with described first coil is corresponding comprises:
Primary importance numerical value corresponding to the magnitude of voltage right with described first coil is obtained based on the corresponding relation of described first coil to the magnitude of voltage right with described first coil of the relative position value with described first magnetic stripe.
Optionally, the second place numerical value that the magnitude of voltage that described acquisition is right with described second coil is corresponding comprises:
Second place numerical value corresponding to the magnitude of voltage right with described second coil is obtained based on the corresponding relation of described second coil to the magnitude of voltage right with described first coil of the relative position value with described second magnetic stripe.
Optionally, described first coil is pair parallel with described first magnetic stripe group with the relative movement orbit of described first magnetic stripe group, and described second coil is pair parallel with described second magnetic stripe with the relative movement orbit of described second magnetic stripe.
The embodiment of the present invention also provides a kind of medical sickbed, comprising: above-mentioned code device, and described code device is suitable for encoding to the position of described medical sickbed.
Compared with prior art, the accumulation result of two position numerical value, to acquisition two position numerical value, is encoded as final position, is significantly improved the precision of coding by technical scheme foundation two groups of magnetic stripes of the present invention and two groups of coils.
Accompanying drawing explanation
Fig. 1 is the code device structural representation of the embodiment of the present invention;
Fig. 2 is the magnetic stripe of the embodiment of the present invention and the corresponding relation schematic diagram of induced signal waveform.
Embodiment
For enabling above-mentioned purpose of the present invention, feature and advantage more become apparent, and are described in detail specific embodiments of the invention below in conjunction with accompanying drawing.
As shown in Figure 1, the embodiment of the present invention provides a kind of code device, and described code device comprises magnetic stripe group and coil groups, and described magnetic stripe group comprises the first magnetic stripe group 11 and the second magnetic stripe 21, described coil groups comprise the first coil to 12 and second coil to 22.
Described first magnetic stripe group 11 comprises: N number of first magnetic stripe 111, N be greater than 1 integer, the first end of rear first magnetic stripe 111 connects the second end of previous first magnetic stripe 111.The length L1 of described first magnetic stripe group 11 is equal with the length L1 of described second magnetic stripe 21.Described first coil is suitable for producing relative motion with described first magnetic stripe group 11 to 12, described second coil is suitable for producing relative motion with described second magnetic stripe 21 to 22, described first coil to 12 and second coil to 22 relative position fix, the relative position of described first magnetic stripe group 11 and described second magnetic stripe 21 is fixed.
Described first magnetic stripe 111 can be vertical bar shape magnet or annular magnet, and described second magnetic stripe 21 is straight bar magnet or annular magnet.Straight bar magnet or annular magnet all can realize the coding to straight-line displacement or curve displacement.Following examples are straight bar magnet with the first magnetic stripe and the second magnetic stripe and are described in detail, those skilled in the art can know the implementation of annular magnet according to the embodiment of straight bar magnet, such as annular magnet is distributed in circumferentially, changed by motion, the coding of circumferential displacement can be obtained.
In the code device shown in Fig. 1, the first magnetic stripe group 11 comprises 4 the first magnetic stripes 111.The first end of described first magnetic stripe 111 is the extreme face of N, and the second end is the extreme face of S.The first end of the 2nd the first magnetic stripe 111 connects the second end of the 1st the first magnetic stripe 111, and namely the extreme face of N of the 2nd the first magnetic stripe 111 connects the extreme face of S of the 1st the first magnetic stripe 111.Similar, the first end of the 3rd the first magnetic stripe 111 connects the second end of the 2nd the first magnetic stripe 111, and the first end of the 4th the first magnetic stripe 111 connects the second end of the 3rd the first magnetic stripe 111.The first end of the second magnetic stripe 21 is the extreme face of N, and the second end is the extreme face of S.The first end of the 1st the first magnetic stripe 111 in the first magnetic stripe group 11 is relative with the first end of described second magnetic stripe 21, and the second end of the 4th the first magnetic stripe 111 is relative with the second end of described second magnetic stripe 21.The corresponding relation of described " relatively " indication can be positioned on same perpendicular line.
In the present embodiment, first coil to 12 and first magnetic stripe group 11 can produce relative motion, for producing induced signal according to Hall effect in relative motion, second coil to 22 and second magnetic stripe 21 can produce relative motion, for producing induced signal according to Hall effect in relative motion, but, even if in relative motion the first coil to 12 and second coil to 22 relative position fix, the relative position of the first magnetic stripe group 11 and described second magnetic stripe 21 is fixed.Described first magnetic stripe group 11 can be parallel with the second magnetic stripe 21.
Described first coil can comprise 12: the first coil 121 and the second coil 122, and the length L2 of described first magnetic stripe 111 is integral multiples of the distance L3 of described first coil 121 and the second coil 122.The distance of described first coil 121 and the second coil 122 refers to: the distance of the central point of described first coil 121 and the second coil 122.Described first coil 121 and the second coil 122 can be a pair Hall coil.
The ratio of the length L2 of the first magnetic stripe 111 and the distance L3 of the first coil 121 and the second coil 122 determine the first coil to 12 and first magnetic stripe group 11 can produce relative motion time, the phase differential of the induced signal that the first coil 121 and the second coil 122 produce.As L2/L3=4, the first coil 121 and the second coil 122 can produce two induced signals that phase differential is 90 degree.
Described second coil comprises 22: tertiary coil 221 and the 4th coil 222, and the length L1 of described second magnetic stripe 21 is integral multiples of the distance L4 of described tertiary coil 221 and the 4th coil 222.The distance of described tertiary coil 221 and the 4th coil 222 refers to: the distance of the central point of described tertiary coil 221 and the 4th coil 222.Described tertiary coil 221 and the 4th coil 222 can be a pair Hall coil.
The ratio of the distance L4 of the length L1 of the second magnetic stripe 21 and tertiary coil 221 and the 4th coil 222 determine the second coil to 22 and second magnetic stripe 21 can produce relative motion time, the phase differential of the induced signal that tertiary coil 221 and the 4th coil 222 produce.As L1/L4=4, tertiary coil 221 and the 4th coil 222 can produce two induced signals that phase differential is 90 degree.
The ratio of the distance L3 of the length L2 of described first magnetic stripe 111 and the first coil 121 and the second coil 122 can be equal with the ratio of the distance L4 of the length L1 of the second magnetic stripe 21 and tertiary coil 221 and the 4th coil 222.The quantity of the first magnetic stripe 111 in described first magnetic stripe group 11 also can be equal with the ratio of the distance L4 of the ratio of distance L3 of the length L2 of described first magnetic stripe 111 and the first coil 121 and the second coil 122 and the length L1 of the second magnetic stripe 21 and tertiary coil 221 and the 4th coil 222, i.e. N=L2/L3=L1/L4.
Corresponding above-mentioned code device, the present embodiment provides a kind of coding method, and described coding method comprises:
Step S1, make described first coil to 12 and second coil simultaneously produce relative motion with described first magnetic stripe group 11 and the second magnetic stripe 21 to 22;
Step S2, obtains the primary importance numerical value corresponding to the magnitude of voltage of 12 with described first coil;
Step S3, obtains the second place numerical value corresponding to the magnitude of voltage of 22 with described second coil;
Step S5, encodes the accumulation result of described primary importance numerical value and second place numerical value as final position.
In step sl, the first magnetic stripe group 11 and the second magnetic stripe 21 can be made to be in geo-stationary, and the first coil to 12 and second coil to 22 relative motions.Also can make the first coil to 12 and second coil to 22 geo-stationary, and the first magnetic stripe group 11 and the second magnetic stripe 21 relative motion.But, no matter in above two kinds of situations, the first coil to 12 and second coil to 22 relative position fix, the relative position of the first magnetic stripe group 11 and described second magnetic stripe 21 is fixed.Described first coil can be parallel with described first magnetic stripe group 11 with the relative movement orbit of described first magnetic stripe group 11 to 12, and described second coil can be parallel with described second magnetic stripe 21 with the relative movement orbit of described second magnetic stripe 21 to 22.
First coil to 12 and second coil can produce induced signal to 22 in the process of relative motion, as shown in Figure 2, first coil 121 produces sinusoidal signal W121, second coil 122 produces sinusoidal signal W122, tertiary coil 221 produces sinusoidal signal W221, and the 4th coil 222 produces sinusoidal signal W222.
The magnitude of voltage of induced signal and coil are have fixing corresponding relation to the relative position with magnetic stripe, apply this corresponding relation, can according to the magnitude of voltage of induced signal obtain the first coil to 12 relative to the position of the first magnetic stripe 111 and the second coil to 22 relative to the position of the second magnetic stripe 21.
First magnetic stripe group 11 comprises N number of first magnetic stripe 111, the induced signal produced when first coil moves relative to each first magnetic stripe 111 to 12 is identical, so the sinusoidal signal W121 that the first coil 121 and the second coil 122 produce and sinusoidal signal W122 comprises the sinusoidal signal in N number of cycle.And the second coil only has one-period to 22 relative to the sinusoidal signal of the second magnetic stripe 21 generation.
In order to the magnitude of voltage right by coil obtains corresponding position numerical value, the corresponding relation of the right magnitude of voltage of coil and position numerical value first can be set up.
Concrete, set up described first coil to 12 and the relative position value of described first magnetic stripe 111 and described first coil to the corresponding relation of magnitude of voltage of 12, and obtain the primary importance numerical value corresponding to the magnitude of voltage of 12 with described first coil based on described corresponding relation.Set up described second coil to 22 and the relative position value of described second magnetic stripe 21 and described second coil to the corresponding relation of magnitude of voltage of 22, obtain the second place numerical value corresponding to the magnitude of voltage of 22 with described second coil based on described corresponding relation.Magnitude of voltage in relative position value described in the present embodiment and coil voltage value corresponding relation refers to range of voltage values.
Still comprise 4 the first magnetic stripes 111 for the first magnetic stripe group 11 below, the length L2 of described first magnetic stripe 111 is the first coil 121 and 4 times of distance L3 of the second coil 122, the length L1 of the second magnetic stripe 21 is that 4 times of the distance L4 of tertiary coil 221 and the 4th coil 222 go on to say.
1/4 cycle of phase of the sinusoidal signal W121 that the first coil 121 produces and the sinusoidal signal W122 that the second coil 122 produces, the sinusoidal signal W121 of the corresponding one-period of each first magnetic stripe 111 and sinusoidal signal W122 of one-period.The sinusoidal signal W122 in sinusoidal signal W121 and four cycle in the first magnetic stripe group 11 corresponding four cycles.
Fig. 2 shows the corresponding relation of sinusoidal signal W121 and W122 and the first magnetic stripe group 11 length L1, and transverse axis represents length, and the longitudinal axis represents magnitude of voltage.
The length L2 of the first magnetic stripe 111 is known numeric value that can be measured, and therefore, 0 extremely extremely extremely extremely extremely corresponding to position to position and 1 to position, 3/4 to position, 1/2 to position, 1/4 position numerical value of each first magnetic stripe 111 can be known.Such as, the length of the first magnetic stripe 111 is 10mm, then 0 of the first magnetic stripe 111 extremely corresponding to position position numerical value is 0mm, and 1/4 extremely corresponding to position position numerical value is 2.5mm, 1/2 extremely corresponding to position position numerical value is 5mm, and 3/4 extremely corresponding to position position numerical value is 7.5mm.
Corresponding each first magnetic stripe 111 0 extremely to position, the magnitude of voltage of sinusoidal signal W121 is greater than 0V and is less than V1, and the magnitude of voltage of sinusoidal signal W122 is greater than 0V and is less than V1;
Corresponding each first magnetic stripe 111 1/4 extremely to position, the magnitude of voltage of sinusoidal signal W121 is greater than 0V and is less than V1, and the magnitude of voltage of sinusoidal signal W122 is less than 0V and is greater than-V1;
Corresponding each first magnetic stripe 111 1/2 extremely to position, the magnitude of voltage of sinusoidal signal W121 is less than 0V and is greater than-V1, and the magnitude of voltage of sinusoidal signal W122 is less than 0V and is greater than-V1;
Corresponding each first magnetic stripe 111 3/4 extremely to position, the magnitude of voltage of sinusoidal signal W121 is less than 0V and is greater than-V1, and the magnitude of voltage of sinusoidal signal W122 is greater than 0V and is less than V1.
1/4 cycle of phase of the sinusoidal signal W221 that tertiary coil 221 produces and the sinusoidal signal W222 that the 4th coil 222 produces.A sinusoidal signal W221 and one sinusoidal signal W222 of the corresponding one-period of the second magnetic stripe 21.
The length L1 of the second magnetic stripe 21 is also known numeric value that can be measured, and therefore, 0 extremely extremely extremely extremely extremely corresponding to position to position and 1 to position, 3/4 to position, 1/2 to position, 1/4 position numerical value of the second magnetic stripe 21 can be known.Such as, when the length of the first magnetic stripe 111 is 10mm, the length of the second magnetic stripe 21 is 40mm, then 0 of the second magnetic stripe 21 extremely corresponding to position position numerical value is 0mm, 1/4 extremely corresponding to position position numerical value is 10mm, 1/2 extremely corresponding to position position numerical value is 20mm, and 3/4 extremely corresponding to position position numerical value is 30mm.
Corresponding second magnetic stripe 21 0 extremely to position, the magnitude of voltage of sinusoidal signal W221 is greater than 0V and is less than V2, and the magnitude of voltage of sinusoidal signal W222 is greater than 0V and is less than V2;
Corresponding second magnetic stripe 21 1/4 extremely to position, the magnitude of voltage of sinusoidal signal W221 is greater than 0V and is less than V2, and the magnitude of voltage of sinusoidal signal W222 is less than 0V and is greater than-V2;
Corresponding second magnetic stripe 21 1/2 extremely to position, the magnitude of voltage of sinusoidal signal W221 is less than 0V and is greater than-V2, and the magnitude of voltage of sinusoidal signal W222 is less than 0V and is greater than-V2;
Corresponding second magnetic stripe 21 3/4 extremely to position, the magnitude of voltage of sinusoidal signal W221 is less than 0V and is greater than-V2, and the magnitude of voltage of sinusoidal signal W222 is greater than 0V and is less than V2.
As can be seen from above-mentioned corresponding relation, because each coil has fixing phase relation to two sinusoidal signals produced, so the corresponding position numerical value of magnitude of voltage that each coil is right.Such as, the magnitude of voltage recording the first coil 121 be V1 and the magnitude of voltage of the second coil 122 is 0V time, the first coil can be determined to 1/4 of 12 corresponding first magnetic stripes 111 extremely to position.The magnitude of voltage recording tertiary coil 221 be-V2 and the magnitude of voltage of the 4th coil 222 is 0V time, the second coil can be determined to 3/4 of 22 corresponding second magnetic stripes 21 extremely to position.
Set up the quantity of the corresponding relation of the right magnitude of voltage of coil and position numerical value, can set according to actual needs, above-described embodiment only illustrates with one-period collection five points, but should not be limited to this.
The final position obtained in the present embodiment step S3 is encoded to the accumulation result of primary importance numerical value and second place numerical value, can improve the precision obtaining final position coding like this.
Concrete, suppose that the first magnetic stripe group 11 and the second magnetic stripe 21 are fixed on the slide rail of medical sickbed, be in relative static conditions, the first magnetic stripe 111 length is 1m, and the second magnetic stripe 21 length is 4m.First coil to 12 and second coil be fixed on the bed body of medical sickbed to 22, this body can relative to slide rail produce motion.The corresponding relation of magnetic stripe and induced signal as shown in Figure 2.First coil to 12 the corresponding first magnetic stripe group 11 of initial position the 1st the first magnetic stripe 111 0 extremely to position, the second coil to 22 corresponding second magnetic stripe 21 of initial position 0 extremely to position.
Bed body from initial position along slide rail mobile, namely the first coil to 12 the first magnetic stripe group 11 the 1st the first magnetic stripe 111 0 extremely to position setting in motion, the second coil to 22 to keep the mode of fixing relative position relation extremely to move to position from 0 of the second magnetic stripe 21 with the first coil to 12 simultaneously.First coil to 12 and second coil embody the existing position for slide rail of medical sickbed to 22 relative to the position of the first magnetic stripe group 11 and the second magnetic stripe 21.
Bed body is when sliding into a certain position, and recording the first coil to the magnitude of voltage of the first coil 121 in 12 is V1, and the magnitude of voltage of the second coil 122 is 0V, and the magnitude of voltage of tertiary coil 221 is greater than 0V and is less than V2, and the magnitude of voltage of the 4th coil 222 is less than 0V and is greater than-V2.
Magnitude of voltage according to the first coil 121 and the second coil 122 can learn the first coil to 1/4 of 12 current corresponding first magnetic stripes 111 extremely to position, and therefore, the primary importance numerical value of acquisition is 0.25m.Magnitude of voltage according to tertiary coil 221 and the 4th coil 222 can learn the second coil to 1/4 of 22 current corresponding second magnetic stripes 21 extremely to position, and therefore, the second place numerical value of acquisition is 1m.Be that 1m adds up by primary importance numerical value 0.25m and second place numerical value, obtain when the final position of external crucible body is encoded to 1.25m.
Can obviously be found out by above-mentioned citing, compared to only having a magnetic stripe in prior art, signal in the induced signal cycle can only be encoded, only to encode when sample frequency is limited several position, the present embodiment code device and coding method according to two groups of magnetic stripes and two groups of coils to acquisition two position numerical value, using the mode that the accumulation result of two position numerical value is encoded as final position, under identical sample frequency, more only relying on a magnetic stripe and a coil to determining the mode encoded in final position, significantly improving the precision of coding.
Although the present invention discloses as above, the present invention is not defined in this.Any those skilled in the art, without departing from the spirit and scope of the present invention, all can make various changes or modifications, and therefore protection scope of the present invention should be as the criterion with claim limited range.
Claims (13)
1. a code device, is characterized in that, comprising: magnetic stripe group and coil groups, and described magnetic stripe group comprises the first magnetic stripe group and the second magnetic stripe, described coil groups comprise the first coil to the second coil pair;
Described first magnetic stripe group comprises: N number of first magnetic stripe, N be greater than 1 integer, the first end of rear first magnetic stripe connects the second end of previous first magnetic stripe;
The length of described first magnetic stripe group is equal with the length of described second magnetic stripe;
Described first coil produces relative motion to being suitable for described first magnetic stripe group, described second coil produces relative motion to being suitable for described second magnetic stripe, described first coil pair and the right relative position of the second coil are fixed, and the relative position of described first magnetic stripe group and described second magnetic stripe is fixed.
2. code device as claimed in claim 1, it is characterized in that, the first end of the 1st the first magnetic stripe in described first magnetic stripe group is relative with the first end of described second magnetic stripe, and the second end of last the first magnetic stripe is relative with the second end of described second magnetic stripe.
3. code device as claimed in claim 1, it is characterized in that, described first coil is to comprising: the first coil and the second coil, and the length of described first magnetic stripe is the integral multiple of the distance of described first coil and the second coil.
4. code device as claimed in claim 1, it is characterized in that, described second coil is to comprising: tertiary coil and the 4th coil, and the length of described second magnetic stripe is the integral multiple of the distance of described tertiary coil and the 4th coil.
5. code device as claimed in claim 1, it is characterized in that, described first magnetic stripe group comprises 4 the first magnetic stripes, described first coil is to comprising: the first coil and the second coil, the length of described first magnetic stripe is 4 times of the distance of described first coil and the second coil, described second coil is to comprising: tertiary coil and the 4th coil, and the length of described second magnetic stripe is 4 times of the distance of described tertiary coil and the 4th coil.
6. code device as claimed in claim 1, it is characterized in that, described first magnetic stripe is straight bar magnet or annular magnet, and described second magnetic stripe is straight bar magnet or annular magnet.
7. code device as claimed in claim 1, it is characterized in that, described first magnetic stripe group is parallel with the second magnetic stripe.
8. utilize code device described in claim 1 to carry out a coding method of encoding, it is characterized in that, comprising:
Make described first coil to the second coil to simultaneously producing relative motion with described first magnetic stripe group and the second magnetic stripe;
Obtain the primary importance numerical value that the magnitude of voltage right with described first coil is corresponding;
Obtain the second place numerical value that the magnitude of voltage right with described second coil is corresponding;
The accumulation result of described primary importance numerical value and second place numerical value is encoded as final position.
9. coding method as claimed in claim 8, is characterized in that, also comprise:
Set up described first coil to the corresponding relation with the relative position value of described first magnetic stripe and the right magnitude of voltage of described first coil;
Set up described second coil to the corresponding relation with the relative position value of described second magnetic stripe and the right magnitude of voltage of described second coil.
10. coding method as claimed in claim 9, is characterized in that, the primary importance numerical value that the described acquisition magnitude of voltage right with described first coil is corresponding comprises:
Primary importance numerical value corresponding to the magnitude of voltage right with described first coil is obtained based on the corresponding relation of described first coil to the magnitude of voltage right with described first coil of the relative position value with described first magnetic stripe.
11. coding methods as claimed in claim 9, is characterized in that, the second place numerical value that the described acquisition magnitude of voltage right with described second coil is corresponding comprises:
Second place numerical value corresponding to the magnitude of voltage right with described second coil is obtained based on the corresponding relation of described second coil to the magnitude of voltage right with described first coil of the relative position value with described second magnetic stripe.
12. coding methods as claimed in claim 8, it is characterized in that, described first coil is pair parallel with described first magnetic stripe group with the relative movement orbit of described first magnetic stripe group, and described second coil is pair parallel with described second magnetic stripe with the relative movement orbit of described second magnetic stripe.
13. 1 kinds of medical sickbeds, is characterized in that, comprising: code device according to claim 1, and described code device is suitable for encoding to the position of described medical sickbed.
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| CN201410390505.3A CN105333891A (en) | 2014-08-08 | 2014-08-08 | Coding device and method and medical ward bed |
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| CN201410390505.3A CN105333891A (en) | 2014-08-08 | 2014-08-08 | Coding device and method and medical ward bed |
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Application publication date: 20160217 |