CN201847707U - Bone-density measuring device - Google Patents
Bone-density measuring device Download PDFInfo
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- CN201847707U CN201847707U CN2010205518090U CN201020551809U CN201847707U CN 201847707 U CN201847707 U CN 201847707U CN 2010205518090 U CN2010205518090 U CN 2010205518090U CN 201020551809 U CN201020551809 U CN 201020551809U CN 201847707 U CN201847707 U CN 201847707U
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- receiving transducer
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- dividing plate
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Abstract
The utility model discloses a measuring device for detecting bone density by an axial quantitative ultrasonic method, wherein a shell is fixedly connected with one end of a spring group, the other end of the spring group is connected with a lateral pad, an arm measuring slot is formed in the upper space of the lateral pad, and two identical transmitting probes and a receiving probe are arranged at the opposite sides of the lateral pad; the two transmitting probes and the receiving probe are positioned on the same plane at one side of a baffle plate, and the bottom end of the receiving probe is connected with a driving part; the lateral pad is driven to horizontally move in the arm measuring slot by the spring group, a lead screw is driven to rotate by the rotating shaft of a stepping motor so as to drive the receiving probe to move, the two transmitting probes are used for sequentially transmitting ultrasonic slow waves, and the receiving probe is used for converting the ultrasonic slow waves received at two times into an electrical signal to be sent for post treatment; and the measurement error brought by the thickness of soft tissues on a bone is eliminated, the position of the receiving probe is accurately positioned, and the measurement accuracy is improved.
Description
Technical field
This utility model relates to technical field of medical instruments, is specifically related to the measuring device that axial quantitative ultrasound method detects bone density.
Background technology
The quantitative ultrasound technology is existing so far historical for many years in the research of the loose disease context of detection of sclerotin, can predict that clinically fracture takes place, have noinvasive, portable, be suitable for advantages such as the crowd is wide, favorable repeatability.What application was maximum at present is the ultrasonic cross communications, and the horizontal transmission technology is used two piezoelectric transducers, and one of these two piezoelectric transducers another is as receptor as emitter, and the both sides that are placed on tested bony site are measured.This method is measured the slope relation of supersonic frequency and amplitude fading, i.e. broadband ultrasonic attenuation coefficient and ultrasonic propagation velocity.Ultrasonic when propagating in the bone both sides part propagate along bone bed, the distance of this part ultrasonic propagation will be greater than distance between the ultrasonic probe of bone both sides, and is less than normal by the spread speed that this ultrasonic propagation pattern is derived; And another part is propagated through medullary cavity, propagation medium difference on this paths, ultrasonic velocity is inhomogeneous, has intensive Dispersion simultaneously, the spread speed of Tui Suaning depends on the value mode of time delay to a great extent thus, and, calculate ultrasonic propagation velocity and attenuation quotient and be and suppose that the influence that soft tissue thickness brings on the known or bone of bone thickness ignores, this hypothesis has been brought coarse measurement result, has limited the degree of accuracy of spread speed and attenuation quotient.
Up-to-date instrument brings into use the axial communications of quantitative ultrasound to measure bone density, and axially the most homonymy that uses two piezoelectric transducers to be placed on tested bony site of transmission technology is measured.The ultrasonic signal that converts to through receiving transducer had both comprised first and had arrived ripple, also comprise ripple at a slow speed, ripple is one group of and then waveform of the first arrival ripple arrival at a slow speed, spread speed is slow, energy is higher, amplitude phase velocity big, signal meets basic bending wave pattern, arriving ripple with respect to first can provide more effective data to detect the loose disease of sclerotin, the monitoring bone growth.Traditional axial communications uses first to arrive ripple and calculate propagation delay, yet when ultrasonic wavelength during less than thickness of cortex of bone, first arrives ripple can not well reflect defectives such as thickness of cortex of bone, less, the long propagation decay of amplitude are too big.
Summary of the invention
The purpose of this utility model is for overcoming above-mentioned the deficiencies in the prior art, a kind of measuring device of bone density is provided, reject the measurement error that soft tissue thickness brings on the bone, convenient, accurate location, raising certainty of measurement.
This utility model is achieved through the following technical solutions: have a shell, shell connects base, fixedly connected groups of springs one end of shell, the groups of springs other end connects the side pad, side pad upper space is formed with the arm measuring flume, side pad couple positioned opposite has two identical transmitting probes and a receiving transducer, and receiving transducer is between two transmitting probes; Fixedly connected dividing plate of base and probe fixing head, two transmitting probes and receiving transducer are positioned at the same plane of dividing plate one side, and transmitting probe embeds the probe fixing hole on the probe fixing head left side and the dividing plate hole on the dividing plate left side; Transmitting probe embeds the probe fixing hole on probe fixing head the right and the dividing plate hole on dividing plate the right; The receiving transducer gap is nested in intermediary septalium of dividing plate and the probe fixing head intermediary probe holddown groove, the distance between the dividing plate hole, the left and right sides with about distance between the probe fixing hole equate; The bottom of receiving transducer connects drive disk assembly.
The beneficial effects of the utility model are: 1, adopt two-way ultrasound emission technology, the transmitting-receiving process is symmetry fully, has rejected the measurement error that soft tissue thickness brings on the bone.2, motor conveniently, is accurately located the position of receiving transducer and is repeatedly measured and get average, has improved certainty of measurement.3, two transmitting probe fixed-site, receiving transducer are between two transmitting probes, and the ultrasonic propagation distance is a certain value, and measuring distance is accurate.4, the arm measuring flume adopts the spring of retractility to regulate size, the arm of suitable different scale, and the measurement crowd is wide.
Description of drawings
Below in conjunction with the drawings and specific embodiments this utility model is described in further detail.
Fig. 1 is the structural representation of this utility model measuring device.
Fig. 2 is the structural representation of probe fixing head 10 among Fig. 1.
Fig. 3 is the structural representation of Fig. 1 median septum 9.
Fig. 4 is the structural representation of transmitting probe 6 among Fig. 1.
Fig. 5 is the assembling sketch map of transmitting probe 6,7 and receiving transducer 8 among Fig. 1.
Fig. 6 is motor 12 and leading screw 16 sketch map that is in transmission connection among Fig. 1.
Among the figure: 1. shell; 2. groups of springs; 3. side pad; 4. arm measuring flume; 5. base; 6,7. transmitting probe; 8. receiving transducer; 9. dividing plate; 10. probe fixing head; 11. pedestal; 12. motor; 13. motor pedestal; 14. another pedestal; 15. nut is paid; 16. leading screw.
The specific embodiment
As Fig. 1: the measuring device of bone density has a shell 1, and shell 1 connects base 5, an end of shell 1 fixedly connected groups of springs 2, and the other end of groups of springs 2 connects side pad 3, and promptly groups of springs 2 with Telescopic of side pad 3 and shell 1 usefulness links together both.The upper surface of side pad 3 bends to curve form, and the upper space of side pad 3 forms arm measuring flume 4, and arm measuring flume 4 has bigger open space, puts in the arm measuring flume 4 to hold tested arm.
At the opposite side of side pad 3, transmitting probe 6, transmitting probe 7, receiving transducer 8, dividing plate 9 and probe fixing head 10 are set, base 5 is fixedlyed connected at the two ends of the dividing plate 9 and the fixing head 10 of popping one's head in.The structure of probe fixing head 10 as shown in Figure 2, left-right symmetric has probe fixing hole 10a and 10b on the probe fixing head 10, has probe holddown groove 10c in the middle of probe fixing hole 10a and the 10b.The structure of dividing plate 9 as shown in Figure 3, left-right symmetric has dividing plate hole 9a and 9b on the dividing plate 9, is septalium 9c between dividing plate hole 9a and 9b, the distance between left and right sides dividing plate hole 9a and the 9b with about distance between probe fixing hole 10a and the 10b equate.Transmitting probe 6 is identical with the structure of transmitting probe 7; install relatively each other; its structure as shown in Figure 4; with transmitting probe 6 is the example explanation; transmitting probe 6 is by probe matching layer 6a; receiving transducer probe 6b; probe grooves 6c; retaining lobe 6d; spring 6e; signal lead hole 6f and probe fixing hole 6g form; wherein; receiving transducer probe 6b and spring 6e are housed in the probe grooves 6c; the top of receiving transducer probe 6b is probe matching layer 6a; probe matching layer 6a has one deck sphere material identical with the skin attribute, is easy to receive and dispatch ultrasonic signal when fully contacting with tested arm, plays the tested arm of protection again and is not launched the effect that probe tip 6b stabs.The bottom of receiving transducer probe 6b connects the end of spring 6e, the other end of spring 6e is connected with the base of transmitting probe 6, be retaining lobe 6d between probe grooves 6c inwall and receiving transducer probe 6b, retaining lobe 6d is used to limit transmitting probe probe 6b and does not eject probe grooves 6c.Have signal lead hole 6f on the probe grooves 6c, from then on control signal wire and test signal line are drawn in the hole, for the subsequent treatment resume module.Transmitting probe probe 6b is squeezed, and spring 6e is flexible in probe grooves 6c, drives transmitting probe probe 6b and moves horizontally the characteristics that the realization level is flexible.
The 26S Proteasome Structure and Function of transmitting probe 7 is identical with transmitting probe 6, and the probe grooves on the receiving transducer 8 is longer than transmitting probe 6, and all the other 26S Proteasome Structure and Functions are all identical with transmitting probe 6,7, repeat no more.
The assembling of transmitting probe 6,7 and receiving transducer 8 as shown in Figure 5, transmitting probe 6,7 and receiving transducer 8 are positioned at the same plane of dividing plate 9 one sides, probe fixing hole 10a on transmitting probe 6 and the probe fixing head 10 and the dividing plate hole 9a on the dividing plate 9 match, and probe fixing hole 10b on transmitting probe 7 and the probe fixing head 10 and the dividing plate hole 9b on the dividing plate 9 match.Receiving transducer 8 matches with septalium 9c and probe holddown groove 10c, makes receiving transducer 8 between transmitting probe 6,7.Transmitting probe 6 is embedded among probe fixing hole 10a and the dividing plate hole 9a, transmitting probe 6 and probe fixing head 10 are fixed together with screw at probe fixing hole 6g place, equally, transmitting probe 7 is embedded among probe fixing hole 10b and the dividing plate hole 9b, with screw transmitting probe 7 and probe fixing head 10 is fixed together.Receiving transducer 8 gap simultaneously is nested among septalium 9c and the probe holddown groove 10c, and can move in septalium 9c and probe holddown groove 10c, receiving transducer 8 the bottom attaching nut pay 15.
Shown in Fig. 1,6, the bottom of receiving transducer 8 connects drive disk assembly, and this drive disk assembly is by pedestal 11, motor 12, motor pedestal 13, another pedestal 14, nut pay 15 and leading screw 16 form.Wherein, the motor main body 12b that motor 12 has partly is screwed on motor pedestal 13, and pedestal 11 relatively is fixed on the base 5 with motor pedestal 13.Leading screw 16 1 ends connect pedestal 11, embed among the pedestal hole 11b on the pedestal 11, have pedestal fixing hole 11a on the pedestal 11, and 11a is fixed on pedestal 11 on the base 5 with screw by this pedestal fixing hole; Leading screw 16 mid portions are leading screw main body 16a, be with nut and pay 15 on leading screw main body 16a; Leading screw 16 other end 16b are hollow tubular structures, and the rotating shaft 12a of motor 12 embeds among the other end 16b of leading screw 16, and is screwed connection.The bottom of receiving transducer 8 is paid 15 by nut and is connected with leading screw 16.Nut pay 15 and motor 12 between be another pedestal 14, leading screw 16 other end 16b pass the pedestal hole 14b on another pedestal 14, another pedestal 14 bottoms have pedestal fixing hole 14a, another pedestal 14 are fixed on the base 5 with screw by pedestal fixing hole 14a.
This utility model adopts axially and measures, the same side that transmitting probe 7 and receiving transducer 8 is placed on tested bone is measured, transmitting probe 6 and transmitting probe 7 are launched ultrasonic ripple at a slow speed successively, and receiving transducer 8 receives between transmitting probe 6 and transmitting probe 7 propagates the ultrasonic ripple at a slow speed of coming.Ripple is propagated in whole thickness of cortex of bone at a slow speed, and is very sensitive to thickness of cortex of bone, can access comprehensive cortical bone inside configuration information.The decay of ripple is less at a slow speed, compares with existing other ultrasonic method, and more how long the characteristic information of cortical bone bone can be provided.During measurement, put tested arm into arm measuring flume 4, groups of springs 2 drives side pad 3 and moves horizontally in arm measuring flume 4, regulate the size of arm measuring flume 4, the crowd who is fit to different arm sizes measures, can guarantee that again tested arm closely contacts with transmitting probe 6, transmitting probe 7 and receiving transducer 8, and be unlikely to the tested arm of crush injury.Start motor 12, the rotating shaft 12a of motor drives leading screw 16 and rotates, and makes nut pay 15 and moves that drive receiving transducer 8 moves on leading screw main body 16a, thereby change the receiving position of receiving transducer 8 in probe loose slot 10c and septalium 9c.Motor 12 drives receiving transducer 8 by leading screw 16 and moves accurately and easily, the position of location receiving transducer 8, each receiving transducer 8 moves a position, transmitting probe 6 and transmitting probe 7 are launched ultrasonic ripple at a slow speed successively, the ultrasonic ripple at a slow speed that receiving transducer 8 will receive is converted into the signal of telecommunication and send subsequent module for processing, so repeatedly measure, make receiving transducer 8, transmitting probe 6, transmitting probe 7 positions symmetry fully, rejected on the bone soft tissue thickness the influence of bone density when detecting.Repeatedly measure the ultrasonic propagation velocity in different parts interval, obtain average then, can reduce the error of single measurement, further improve certainty of measurement as its final ultrasonic propagation velocity.
Claims (3)
1. the measuring device of a bone density, has a shell (1), shell (1) connects base (5), it is characterized in that: fixedly connected groups of springs (2) one ends of shell (1), groups of springs (2) other end connects side pad (3), side pad (3) upper space is formed with arm measuring flume (4), and side pad (3) couple positioned opposite has two identical transmitting probes (6,7) and a receiving transducer (8), and receiving transducer (8) is positioned between two transmitting probes (6,7); Fixedly connected dividing plate of base (5) (9) and probe fixing head (10), two transmitting probes (6,7) and receiving transducer (8) are positioned at the same plane of dividing plate (9) one sides, and transmitting probe (6) embeds the probe fixing hole (10a) on probe fixing head (10) left side and the dividing plate hole (9a) on dividing plate (9) left side; Transmitting probe (7) embeds the probe fixing hole (10b) on probe fixing head (10) the right and the dividing plate hole (9b) on dividing plate (9) the right; Receiving transducer (8) gap is nested in intermediary septalium of dividing plate (9) (9c) and probe fixing head (10) intermediary probe holddown grooves (10c), the distance between dividing plate hole, the left and right sides (9a, 9b) with about the distance of popping one's head between the fixing hole (10a, 10b) equate; The bottom of receiving transducer (8) connects drive disk assembly.
2. the measuring device of bone density according to claim 1, it is characterized in that: described drive disk assembly comprises pedestal (11), motor (12), motor pedestal (13), nut are paid (15) and leading screw (16); The fixedly connected motor pedestal of motor (12) (13), pedestal (11) relatively is fixed on the described base (5) with motor pedestal (13); Leading screw (16) one ends connect pedestal (11), are with nut on the leading screw main body (16a) of mid portion and pay (15); Leading screw (16) other end connects the rotating shaft (12a) of motor (12), and the bottom of described receiving transducer (8) is paid (15) by nut and connected leading screw (16).
3. the measuring device of bone density according to claim 1, it is characterized in that: transmitting probe (6) is by probe matching layer (6a), receiving transducer probe (6b), probe grooves (6c), retaining lobe (6d), spring (6e), signal lead hole (6f) and probe fixing hole (6g) are formed, receiving transducer probe (6b) and spring (6e) are housed in the probe grooves (6c), the top of receiving transducer probe (6b) is a probe matching layer (6a), the bottom of receiving transducer probe (6b) connects spring (6e) end, spring (6e) other end is connected with the base of transmitting probe (6), be retaining lobe (6d) between probe grooves (6c) inwall and receiving transducer probe (6b), have signal lead hole (6f) on the probe grooves (6c); Probe grooves on the described receiving transducer (8) is longer than transmitting probe (6), and all the other structures are identical with two transmitting probes (6,7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205518090U CN201847707U (en) | 2010-09-27 | 2010-09-27 | Bone-density measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205518090U CN201847707U (en) | 2010-09-27 | 2010-09-27 | Bone-density measuring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201847707U true CN201847707U (en) | 2011-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205518090U Expired - Fee Related CN201847707U (en) | 2010-09-27 | 2010-09-27 | Bone-density measuring device |
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| CN (1) | CN201847707U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101947116A (en) * | 2010-09-27 | 2011-01-19 | 江苏大学 | Measurement device and detection method for bone density |
| CN102670257A (en) * | 2012-05-16 | 2012-09-19 | 北京航空航天大学 | Heel width measuring device and measuring method suitable for ultrasonic osteoporosis tester |
-
2010
- 2010-09-27 CN CN2010205518090U patent/CN201847707U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101947116A (en) * | 2010-09-27 | 2011-01-19 | 江苏大学 | Measurement device and detection method for bone density |
| CN101947116B (en) * | 2010-09-27 | 2012-02-29 | 江苏大学 | Measurement device and detection method for bone density |
| CN102670257A (en) * | 2012-05-16 | 2012-09-19 | 北京航空航天大学 | Heel width measuring device and measuring method suitable for ultrasonic osteoporosis tester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110601 Termination date: 20110927 |