CN107028611A - A kind of body weight detection method and system for Medical Devices - Google Patents
A kind of body weight detection method and system for Medical Devices Download PDFInfo
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- 230000037396 body weight Effects 0.000 title claims abstract description 127
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- 230000005611 electricity Effects 0.000 description 6
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- 238000005481 NMR spectroscopy Methods 0.000 description 4
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/055—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
- A61B6/032—Transmission computed tomography [CT]
- A61B6/035—Mechanical aspects of CT
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/02—Arrangements for diagnosis sequentially in different planes; Stereoscopic radiation diagnosis
- A61B6/03—Computed tomography [CT]
- A61B6/037—Emission tomography
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/04—Positioning of patients; Tiltable beds or the like
- A61B6/0407—Supports, e.g. tables or beds, for the body or parts of the body
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61B6/00—Apparatus or devices for radiation diagnosis; Apparatus or devices for radiation diagnosis combined with radiation therapy equipment
- A61B6/54—Control of apparatus or devices for radiation diagnosis
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/10—X-ray therapy; Gamma-ray therapy; Particle-irradiation therapy
- A61N5/1048—Monitoring, verifying, controlling systems and methods
- A61N5/1064—Monitoring, verifying, controlling systems and methods for adjusting radiation treatment in response to monitoring
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G19/00—Weighing apparatus or methods adapted for special purposes not provided for in the preceding groups
- G01G19/52—Weighing apparatus combined with other objects, e.g. furniture
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Abstract
The invention discloses a kind of body weight detection method for Medical Devices, the Medical Devices include being used to hold in the palm the bogey and motor for carrying target to be measured, the described method comprises the following steps：S1, motor driving bogey are moved along preset direction；S2, the current value I for obtaining the motor；S3, the body weight m for determining according to the current value I target to be measured, calculation formula are that m=aI+b, wherein a and b are constant.Correspondingly, the invention also discloses a kind of body weight detecting system for Medical Devices.The body weight detection method and system of the present invention, has the advantages that：Do not increasing additionally dedicated for the part of measurement body weight, in the case of not increasing equipment cost, according to the relation between target weight to be measured and the electric current of drive device, the body weight of target to be measured can be calculated by way of the current value for obtaining drive device, has not only been facilitated but also accurate.
Description
Technical field
The present invention relates to check weighing technical field, more particularly to a kind of body weight detection side for Medical Devices
Method and system.
Background technology
In medical imaging diagnostic device, such as nuclear magnetic resonance (Magnetic Resonance, MR), meter
Calculation machine tomoscan (Computed Tomography, CT) etc., generally includes one and carries circular cavity
The imaging device of body and an examination couch.Examination couch generally includes bed board and the bedstead for supporting bed board,
Bed board is moved horizontally under the driving of motor relative to the bedstead, and patient is sent into imaging device refers to
Fixed position is scanned.
Nuclear magnetic resonance is a kind of biological magnetic spin imaging technique, and it is the spy using nuclear spin campaign
Point, in externally-applied magnetic field, produces radiofrequency signal after RF pulse-to-pulse impulse, is detected and inputted with detector
Computer, after computer disposal is changed on screen display image.In the scanned of nuclear magnetic resonance
, it is necessary to set the power of radiofrequency signal according to the body weight of patient in journey, to avoid causing patient damage.
Therefore, the body weight that patient is obtained before scanning has great importance.At present, the body weight of patient is obtained
Usual way is to provide an individual weight values by patient, or is believed by operating personnel according to observed patient
The individual weight values of breath estimation one.The above method, it is inaccurate because of body weight information, or due to operating personnel
Carelessness caused by data entry error, so as to cause the calculating deviation in security monitoring and dive
Safety problem, or cause application parameter limit.Another way is before the scan
Weighed, but operated comparatively laborious.
In order to overcome present in prior art due to needing patient to report body weight, operating personnel's estimation body certainly
Weight, automatic input of weighing, cause body weight information inaccurate, and information input easily the defect of mistake etc. occurs,
Need to propose a kind of new body weight detection method.
The content of the invention
In order to solve the above-mentioned technical problem, the invention provides a kind of body weight detection for Medical Devices
Method, the Medical Devices include being used to hold in the palm the bogey and motor for carrying target to be measured, methods described
Comprise the following steps：
S1, motor drive the bogey to be moved along preset direction；
S2, the current value I for obtaining the motor；
S3, the body weight m for determining according to the current value I target to be measured.
Further, the step S2 includes：When motor drives the bogey even along predetermined direction
When speed is mobile, the current value I of the motor is obtained.
Further, in the step S3, the body weight of the target to be measured and the electric current it
Between relation be：M=a*I+b, wherein a and b are constant.
Further, it is further comprising the steps of：Utilize (m1, I1)、……(mn, In) to described to be measured
Relation between the body weight of target and the electric current is fitted, amendment a andbValue, wherein m1、……
mnThe respectively body weight of several targets to be measured, I1、……InRespectively described motor driving is described some
Individual target to be measured along preset direction at the uniform velocity move when the motor current value, n >=2.
Further, when in the step S1, when preset direction is horizontal direction, the step S3
In：A=k1Cm/ ug, b=-k1T0/ug-m0, wherein k1·For motor output torque and motor pulling force
Direct ratio coefficient, CmFor electric torque coefficient, T0For motor idle torque, μ is the coefficient of kinetic friction, g
For acceleration of gravity, m0For the weight of the bogey.
Further, when in the step S1, when preset direction is vertical direction, the step S3
In：A=ck1·Cm/k2G, b=-ck1T0/k2g-m0, wherein, k1·For motor output torque
With the direct ratio coefficient of motor pulling force, CmFor electric torque coefficient, k2For the equivalent ratio of vertical lifting driving force
Example coefficient, c is motor power output to the equieffective ratio coefficient of screw mandrel thrust, T0For motor idle torque,
μ is the coefficient of kinetic friction, and g is acceleration of gravity, m0For the weight of the bogey.
Further, being obtained in the step S2 also includes following step after the current value I of the motor
Suddenly：The current value I is filtered and correction process, to obtain the correction value of electric current；The correction
Processing includes calculating average value or calculates virtual value.
The present invention also provides another body weight detection method for Medical Devices, the Medical Devices bag
The bogey and motor that target to be measured is carried for holding in the palm are included, be the described method comprises the following steps：
Corresponding relation between S1, the body weight for prestoring target to be measured and motor electric current；
S2, motor drive the bogey to be moved along preset direction；
S3, the current value I for obtaining the motor；
S4, according to pair between the electric current of the body weight and motor of the current value I and the target to be measured
The body weight m for determining target to be measured should be related to.
In addition, the present invention also provides a kind of body weight detecting system for Medical Devices, for detecting position
In the body weight of the target to be measured on bogey, the bogey is pre- in the driving lower edge of drive device
Set direction is moved, and the system includes：
Acquisition module, the current value I for obtaining the drive device；
Computing module, the body weight m for calculating the target to be measured according to the current value I.
Further, the drive device drive the bogey along preset direction at the uniform velocity move when,
The acquisition module obtains the current value I of the drive device.
Further, the relation between the body weight and the electric current of the target to be measured is：
M=a*I+b, wherein a and b are constant.
Further, in addition to fitting module, for according to (m1, I1)、……(mn, In) to described
Relation between the body weight of target to be measured and the electric current is fitted, and corrects a and b value, wherein
m1、……mnThe respectively body weight of several targets to be measured, I1、、……InRespectively described driving dress
Put several described targets to be measured of driving along preset direction at the uniform velocity move when the drive device electric current
Value, and n >=2.
Further, the drive device is motor.
The present invention also provides another body weight detecting system, to be measured on bogey for detecting
The body weight of target, the bogey is moved under the driving of drive device along preset direction, the system
System includes：
Memory module, for storing between the body weight of the target to be measured and the electric current of drive device
Corresponding relation；
Acquisition module：When drive device driving bogey is at the uniform velocity moved along preset direction, obtain and drive
The current value I of dynamic device, and body weight and driving dress according to the electric current I values and the target to be measured
Corresponding relation between the electric current put determines the body weight m of target to be measured.
Present invention also offers a kind of Medical Devices, including body weight detecting system as described above.
The body weight detection method and system of the present invention, has the advantages that：The present invention is not extra
Increase dedicated for measuring the part of body weight, in the case of not increasing equipment cost, according to target to be measured
Relation between body weight and the electric current of drive device, by way of the current value for obtaining drive device i.e.
The body weight of target to be measured can be calculated, has not only been facilitated but also accurate.
Brief description of the drawings
Fig. 1 is the flow chart of the body weight detection method for Medical Devices of the embodiment of the present invention one；
Fig. 2 is the test data curve map of the embodiment of the present invention one；
Fig. 3 is the flow chart of the body weight detection method for Medical Devices of the embodiment of the present invention three；
Fig. 4 is the block diagram of the body weight detecting system for Medical Devices of the embodiment of the present invention four；
Fig. 5 is the block diagram of the body weight detecting system for Medical Devices of the embodiment of the present invention four；
Fig. 6 is the block diagram of the body weight detecting system for Medical Devices of the embodiment of the present invention five.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is entered
Row is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the invention,
Rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not having
There is the every other embodiment obtained on the premise of making creative work, belong to protection of the present invention
Scope.
Embodiment one
The embodiments of the invention provide a kind of body weight detection method, it is mainly used in patient's body in Medical Devices
The measurement of weight, the Medical Devices can be nuclear magnetic resonance equipment, ct apparatus, put
Penetrate therapeutic equipment, XRAY equipment, PET/CT equipment etc..Above-mentioned Medical Devices would generally include checking
Bed, examination couch includes bedstead and is disposed thereon the bed board for carrying patient, and the drive device can
So that including motor, the bed board carrying patient moves in the horizontal direction under the driving of motor, in bed board
Roller can be installed, the roller can also be arranged on bedstead towards bed board on towards the one side of bedstead
On simultaneously.
Fig. 1 is the flow chart of the body weight detection method of the embodiment of the present invention one, with reference to shown in Fig. 1, institute
The method of stating comprises the following steps：
S1, motor driving bogey are moved in the horizontal direction；
S2, the current value for obtaining the motor when bogey uniform motion in the horizontal direction, and to described
Electric current is filtered and correction process；
Before image scan is carried out, target to be measured is inspection on the bed board of examination couch positioned at bogey
During looking into the target location that the bed board of bed is specified from static initial position to arrival system, in control
Under the control of system processed, successively experience accelerate, at the uniform velocity, slow down moving process.Motor is in control system
Under the control of system, driving bed board is moved with corresponding speed；Sensor is provided with control system, is passed
Sensor can read not the electric current of motor in the same time in real time, to during the bed board uniform motion of acquisition not
Electric current in the same time is filtered processing, then by way of calculating average value or calculating virtual value
The electric current handled after filtering is corrected, to obtain the electric current after correction.
S3, the body weight m according to the current value calculating target to be measured after correction.
During motor driving bed board is moved in the horizontal direction, the pulling force of motor
FMotor=(m+m0)a+μ(m+m0)g (1)
Wherein, m is the body weight of patient, m0For the weight of bed board, a is horizontal acceleration, and μ is bed board
Roller coefficient of rolling friction.It should be understood that when being connected by other means between bed board and bedstead,
μ value is different, but for a certain specific examination couch, μ is constant, and is definite value.
When bed board uniform motion in the horizontal direction under the driving of motor, i.e. when acceleration a is 0：
FMotor=f=μ (m+m0)g (2)
And then can draw：
M=FMotor/μg-m0 (3)
The weight m of bed board0, coefficient of rolling friction μ is constant.By taking direct current generator as an example, motor production
Raw pulling force FMotorClosed with the output torque T-phase of motor, according to electromagnetic torque equation：
Te=T+T0=CmI (4)
It can draw：
FMotor=k1T=k1(Te-T0)=k1CmI-k1T0 (5)
Wherein, TeFor motor electromagnetic torque, T0For motor idle torque, k1For motor output torque and drawing
The direct ratio coefficient of power, CmFor electric torque coefficient, I is the armature supply of the current value, i.e. motor of motor.
It can be drawn with reference to formula (3) and (5)：
M=(k1CmI-k1T0)/μg-m0 (6)
M=k1CmI/ug-k1T0/μg-m0 (7)
Due to motor idle torque T0It is related with the friction of mechanical part to motor shaft, electric torque coefficient
CmAnd the direct ratio coefficient k of motor output torque and pulling force1Also it is constant, is passed for a certain specific level
For motivation structure, above-mentioned numerical value is definite value.Therefore weight in patients m and current of electric I is in linear function
Relation：
M=a*I+b (8)
Wherein, a=k1Cm/ μ g, b=-k1T0/μg-m0
S4：Several targets to be measured are chosen, its body weight is respectively m1、m2……mn, and obtain electricity
When the target to be measured that machine drives at the uniform velocity is moved in the horizontal direction, the current value I of the motor1、I2、……In,
Utilize (m1, I1)、(m2, I2)……(mn, In) to the pass between the body weight and current of electric of target to be measured
System is fitted, and corrects a and b value, wherein, n >=2.
Specifically, when examination couch bed board is unloaded, i.e., no patient couches when on examination couch bed board,
The bed board of motor driving examination couch is at the uniform velocity moved in the horizontal direction, by CANreport softwares to inspection
Bed PTC onboard softwares program sends the electric current reading order specified and obtains horizontal drive current of electric, warp
Cross filtering and correction process obtains the current value of the motor when bed board of examination couch at the uniform velocity advances and is
205.4mA, is stepped up, and obtains the results list as follows：
| Load (kg) | 0 | 20 | 40 | 60 | 80 | 100 | 120 | 140 | 160 |
| Electric current (I/mA) | 205.4 | 224 | 228 | 257 | 287 | 294 | 310 | 313 | 317 |
Fig. 2 is the test data curve map of the embodiment of the present invention, with reference to shown in Fig. 2, and abscissa is represented
The weight of examination couch load, ordinate represents current of electric, above-mentioned data is corresponded in coordinate system,
Each point, which is connected, constitutes curve L1, i.e. L1For the weight in patients and motor electricity obtained according to above-mentioned test data
The relation curve of stream；L2To be fitted the relation curve of weight in patients and current of electric later,
M=a*I+b.In the present embodiment, a and b value are asked for by the way of least square fitting, wherein
A=1.312, b=-275.11.
Therefore, calculating weight in patients formula can be fitted to：M=1.312*I-275.11, now,
When only needing to motor driving patient's uniform motion, the electric current of motor, you can calculated and suffered from using above-mentioned formula
The body weight of person is simple to operate accurate.
Embodiment two
A kind of body weight detection method for Medical Devices is present embodiments provided, it is different from embodiment one
, in the present embodiment, bed board carrying patient vertically moves up and down, and methods described includes
Following steps：
S1, motor driving bogey are vertically moved；
S2, the current value I' for obtaining the motor when bogey vertically uniform motion, and to institute
Current value I' is stated to be filtered and correction process；
S3, the body weight m' according to the electric current I' calculating target to be measured after correction.
In the vertical lifting drive system of examination couch, motor drive screw is moved up and down, and screw mandrel drives
Transmission mechanism, so as to drive bed board to do vertical lifting motion by transmission mechanism, it is assumed that screw mandrel thrust is F,
So when motor drives the bed board vertically at the uniform velocity elevating movement of examination couch：
F=k2·(m0+m')g (9)
Wherein k2For vertical lifting driving force equieffective ratio coefficient, the mechanical mechanism with vertical drive device
Size is related；
F=ck1(Te-T0) (10)
Wherein c be motor power output to the equieffective ratio coefficient of screw mandrel thrust, have with screw mandrel mechanical structure
Close；TeFor motor electromagnetic torque, T0For motor idle torque, k1For motor output torque and pulling force just
Than coefficient, and then obtain：
F=ck1(CmI'-T0) (11)
Wherein CmFor electric torque coefficient；
It can be obtained according to formula (9) and (11)：
M'=ck1(CmI-T0)/k2g-m0=ck1·Cm·I/k2g-(ck1T0/k2g+m0) (12)
Due to motor idle torque T0Related with the friction of mechanical part to motor shaft, c is motor power output
It is relevant with screw mandrel mechanical structure to the equieffective ratio coefficient of screw mandrel thrust, electric torque coefficient CmAnd electricity
The direct ratio coefficient k of machine output torque and pulling force1Also it is constant, is driven for a certain specific vertical lifting
For system, above-mentioned numerical value is definite value.Therefore weight in patients m' and current of electric I' is closed in linear function
System：
M'=dI'+e, wherein d and e are constant, d=ck1·Cm/k2G,
E=-ck1T0/k2g-m0,
It is therefore, right because each coefficient is differed for different bogey and drive device
The d and e concrete numerical value answered is also differed, but d and e is a constant, is specifically held for a certain
Carry and put and drive device, its value is definite value.
S4：Several targets to be measured are chosen, its body weight is respectively m'1、m'2……m'n, and obtain electricity
When the machine driving target to be measured is vertically at the uniform velocity lifted, the current value I' of motor1、I'2、……I'n,
Utilize (m'1, I'1)、(m'2, I'2)……(m'n, I'n) to the body weight of the target to be measured and the electric current it
Between relation be fitted, correct d and e value, wherein, n >=2.
The process being specifically fitted is identical with the mode described in embodiment one, and here is omitted.
Embodiment three
Fig. 3 is a kind of flow chart of the body weight detection method for Medical Devices, and the Medical Devices include
The bogey and motor of target to be measured are carried for holding in the palm, with reference to shown in Fig. 3, the body weight inspection of the present embodiment
Survey method comprises the following steps：
Corresponding relation between S1', the body weight for prestoring target to be measured and motor electric current；
S2', motor drive the target to be measured to be moved along preset direction；
S3', the current value I for obtaining the motor；
Between S4', the electric current according to the body weight and motor of the current value I and the target to be measured
Corresponding relation determines the body weight m of target to be measured.The present embodiment exists with embodiment one, the difference of embodiment two
In, it is not the body weight that patient is calculated according to formula m=a*I+b in the present embodiment, but in advance
The patient of different weight is chosen, and obtains the patient levels of motor driving different weight or at the uniform velocity transports vertically
When dynamic, the current value of corresponding motor is pre- by the corresponding relation of the body weight of patient and the current value of motor
It is first stored in memory.Specifically, because the body weight of human body is generally between 0-100KG, this
The weight for the target to be measured that embodiment is chosen is between 0-150KG, and the number of target to be measured is 300
Individual, the weight of 300 targets to be measured is respectively 1KG, 1.5KG, 2KG, 2.5KG ... 150KG,
Motor drives above-mentioned target to be measured at the uniform velocity to move, and measures corresponding motor current value, and treat above-mentioned
The corresponding relation storage surveyed between the weight and current of electric of target is in memory.To a certain patient
Before being scanned, as long as obtaining when motor drives target uniform motion to be measured, the current value of motor,
The body weight of current patents can be obtained by way of accessing memory, easy to operate, precision is higher.
Example IV
Present invention also offers a kind of body weight detecting system, for weight in patients in Medical Devices
Detection, Fig. 4, Fig. 5 are the block diagrams of the body weight detecting system of the embodiment of the present invention four, with reference to shown in Fig. 4,
The body weight detecting system of the present embodiment is used for the body weight for detecting the target to be measured being located on bogey 10,
The bogey 10 is moved under the driving of drive device 20 along preset direction, the body weight detection
System, including acquisition module 30, the current value I for obtaining the drive device 10；Computing module
40, the body weight m for calculating the target to be measured according to the current value I.
Wherein, bogey 10 is the bed board of examination couch, and drive device 20 is motor, the present embodiment
In, motor is direct current generator, and the bed board can carry patient in the horizontal direction under the driving of motor
Or vertical direction movement；The acquisition module 31 can be sensor, and the electricity of motor can be obtained in real time
Stream.
With reference to shown in Fig. 5, in the body weight detecting system of the present embodiment, the acquisition module 30 also includes
Unit 31 is corrected, is filtered for the current value to acquisition and correction process, the correction process can
So that by the way of average value or calculating virtual value is calculated, this is known in the art general knowledge, herein not
Repeat again.
The computing module 40 is used for the body weight that target to be measured is calculated according to the current value, calculation formula
It is constant for m=a*I+b, wherein a and b.
When the drive device 20 is horizontal drive motor, then the acquisition module 30 is used to obtain and worked as
The current value for being moved to horizontal drive motor when at the uniform velocity of bogey 10 in the horizontal direction, the meter
Calculate in formula：A=k1Cm/ μ g, b=-k1T0/μg-m0, k1For output torque and the direct ratio of pulling force
Coefficient, CmFor electric torque coefficient, T0For motor idle torque, m0For the weight of bed board.
When the drive device 20 is vertical lifting motor, a=ck1·Cm/k2G,
B=-ck1T0/k2g-m0, k1For output torque and the direct ratio coefficient of pulling force, k2For vertical lifting
Driving force equieffective ratio coefficient, c is motor power output to the equieffective ratio coefficient of screw mandrel thrust, CmFor electricity
Magnetic torque coefficient, T0For motor idle torque, m0For the weight of bed board.
With continued reference to shown in Fig. 5, the body weight detecting system of the present embodiment, in addition to a fitting module
50, several targets to be measured are chosen, its body weight is respectively m1、m2……mn, and obtain motor driving
When target to be measured is at the uniform velocity moved in the horizontal direction, the current value I of the motor1、I2、……In, utilize
(m1, I1)、(m2, I2)……(mn, In) relation between the body weight and current of electric of target to be measured is entered
Row fitting, corrects a and b value, wherein, n >=2.Described in the process and embodiment one being specifically fitted
Mode is identical.
The body weight detecting system of the present embodiment, can also include a display module, to be measured for showing
The body weight m of target.
Embodiment five
The present embodiment provides a kind of body weight detecting system, and Fig. 6 is the body weight detection of the embodiment of the present invention five
The block diagram of system, with reference to shown in Fig. 6：The body weight detecting system of the present embodiment, holds for detecting to be located at
The body weight for the target to be measured put on 10 is carried, the bogey 10 is under the driving of drive device 20
Moved along preset direction, the body weight detecting system includes：Memory module 60, is treated for prestoring
The corresponding relation surveyed between the body weight and current of electric of target；Specifically, several targets to be measured are chosen,
Because the body weight of human body is generally between 0-100KG, the weight for the target to be measured that the present embodiment is chosen
Between 0-150KG, the number of target to be measured is 300, the weight of 300 targets to be measured
Respectively 1KG, 1.5KG, 2KG, 2.5KG ... 150KG, bogey 10 is held in the palm in load respectively
State target to be measured at the uniform velocity to move, acquisition module 30 measures corresponding motor current value, and treats above-mentioned
The corresponding relation surveyed between the body weight and current of electric of target is stored in memory module 60；It is special at some
Determine before patient is scanned, couch on bogey, to carry the particular patient even when bogey support
When speed is mobile, acquisition module 30 obtains the current value of drive device, and according to the current value, Yi Jisuo
The corresponding relation between the body weight and current of electric of target to be measured is stated, target to be measured can be directly obtained
Body weight.
The embodiment of the present invention also provides a kind of Medical Devices, including image-forming assembly, examination couch, processor,
Controller and body weight detecting system as described above, wherein, the bed board of examination couch is used to carry patient,
And under the driving of drive device, patient is transported to the imaging region of the image-forming assembly, the body
Re-detection system is used for the body weight for detecting the patient being located on examination couch, and the processor is used for according to institute
Body weight information adjustment imaging parameters are stated, the controller is used to control the bed according to the body weight information
Plate stretches out the horizontal range of the examination couch bedstead.
The body weight detection method and system of the present invention, has the advantages that：It is special not increasing additionally
Door is used to measure the part of body weight, in the case of not increasing equipment cost, according to target weight to be measured and
Relation between the electric current of drive device, can be calculated by way of the electric current for obtaining drive device
The body weight of target to be measured, had not only facilitated but also accurate.
Described above is the preferred embodiment of the present invention, it is noted that for the general of the art
For logical technical staff, under the premise without departing from the principles of the invention, can also make some improvement and
Retouching, these improvements and modifications are also considered as protection scope of the present invention.
Claims (15)
1. a kind of body weight detection method for Medical Devices, the Medical Devices include motor and are used for
Support carries the bogey of target to be measured, it is characterised in that the described method comprises the following steps：
S1, motor drive the bogey to be moved along preset direction；
S2, the current value I for obtaining the motor；
S3, the body weight m for determining according to the current value I target to be measured.
2. body weight detection method according to claim 1, it is characterised in that the step S2 tools
Body is：When motor drives the bogey at the uniform velocity to be moved along predetermined direction, the motor is obtained
Current value I.
3. body weight detection method according to claim 2, it is characterised in that in the step S3,
Relation between the body weight and the electric current of the target to be measured is：M=a*I+b, wherein a and b are
Constant.
4. body weight detection method according to claim 3, it is characterised in that also including following step
Suddenly：Utilize (m1, I1)、……(mn, In) between the body weight and the electric current of the target to be measured
Relation is fitted, and corrects a and b value, wherein m1、……mnRespectively several targets to be measured
Body weight, I1、……InRespectively described several described targets to be measured of motor driving are even along preset direction
The current value of the motor, n >=2 when speed is mobile.
5. the body weight detection method according to claim 3 or 4, it is characterised in that when the step
In rapid S1, when preset direction is horizontal direction, in the step S3：A=k1Cm/ ug,
B=-k1T0/ug-m0, wherein k1·For motor output torque and the direct ratio coefficient of motor pulling force, CmFor
Electric torque coefficient, T0For motor idle torque, μ is the coefficient of kinetic friction, and g is acceleration of gravity, m0
For the weight of the bogey.
6. the body weight detection method according to claim 3 or 4, it is characterised in that when the step
In rapid S1, when preset direction is vertical direction, in the step S3：A=ck1·Cm/k2G,
B=-ck1T0/k2g-m0, wherein, k1·For motor output torque and the direct ratio coefficient of motor pulling force,
CmFor electric torque coefficient, k2For vertical lifting driving force equieffective ratio coefficient, c is that motor power output is arrived
The equieffective ratio coefficient of screw mandrel thrust, T0For motor idle torque, μ is the coefficient of kinetic friction, and g is gravity
Acceleration, m0For the weight of the bogey.
7. body weight detection method according to claim 3, it is characterised in that in the step S2
Obtain further comprising the steps of after the current value I of the motor：The current value I is filtered and
Correction process, to obtain the correction value of electric current；The correction process includes calculating average value or calculating having
Valid value.
8. a kind of body weight detection method for Medical Devices, the Medical Devices include being used to ask load to treat
Survey the bogey and motor of target, it is characterised in that the described method comprises the following steps：
Corresponding relation between S1, the body weight for prestoring the target to be measured and motor electric current；
S2, motor drive the bogey to be moved along preset direction；
S3, the current value I for obtaining the motor；
S4, according to pair between the electric current of the body weight and motor of the current value I and the target to be measured
The body weight m for determining target to be measured should be related to.
9. a kind of body weight detecting system for Medical Devices, is located at treating on bogey for detecting
The body weight of target is surveyed, the bogey is moved under the driving of drive device along preset direction, it is special
Levy and be, the system includes：
Acquisition module, the current value I for obtaining the drive device；
Computing module, the body weight m for calculating the target to be measured according to the current value I.
10. body weight detecting system according to claim 9, it is characterised in that the drive device
Drive the bogey along preset direction at the uniform velocity move when, the acquisition module obtains the driving dress
The current value I put.
11. body weight detecting system according to claim 10, it is characterised in that the mesh to be measured
Relation between target body weight and the electric current is：M=a*I+b, wherein a and b are constant.
12. body weight detecting system according to claim 11, it is characterised in that also including fitting
Module, for according to (m1, I1)、……(mn, In) to body weight and the electric current of the target to be measured
Between relation be fitted, correct a and b value, wherein m1、……mnRespectively several are treated
Survey the body weight of target, I1、……InRespectively described several described target edges to be measured of drive device driving
When preset direction is at the uniform velocity moved, the current value of the drive device, and n >=2.
13. the body weight detecting system according to claim 9-12 any one, it is characterised in that
The drive device is motor.
14. a kind of body weight detecting system for Medical Devices, is located at treating on bogey for detecting
The body weight of target is surveyed, the bogey is moved under the driving of drive device along preset direction, it is special
Levy and be, the system includes：
Memory module, for storing between the body weight of the target to be measured and the electric current of drive device
Corresponding relation；
Acquisition module：When drive device driving bogey is at the uniform velocity moved along preset direction, obtain and drive
The current value I of dynamic device, and body weight and driving dress according to the current value I and the target to be measured
Corresponding relation between the electric current put determines the body weight m of target to be measured.
15. a kind of Medical Devices, it is characterised in that including as described in claim any one of 9-14
Body weight detecting system.
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