CN103054624B - Surgical skull grinding temperature online detection and controllable handheld grinding device - Google Patents
Surgical skull grinding temperature online detection and controllable handheld grinding device Download PDFInfo
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- CN103054624B CN103054624B CN201310030327.9A CN201310030327A CN103054624B CN 103054624 B CN103054624 B CN 103054624B CN 201310030327 A CN201310030327 A CN 201310030327A CN 103054624 B CN103054624 B CN 103054624B
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Abstract
The invention relates to a surgical skull grinding temperature online detection and controllable handheld grinding device. The surgical skull grinding temperature online detection and controllable handheld grinding device is high in control precision, and skull grinding acoustic emission signals are monitored, so that the rotational speed of a grinding wheel is adjusted, the grinding temperature is reduced in a skull grinding procedure, and heat injury to brain tissues of a patient can be effectively prevented. The surgical skull grinding temperature online detection and controllable handheld grinding device comprises a shell, the grinding wheel is mounted at the front end of the shell and is connected with a direct-current motor by a transmission, an acoustic emission sensor is arranged at a joint of the grinding wheel and the shell and is connected with a signal analysis processing module by a conducting wire, the signal analysis processing module is arranged in the shell and is respectively connected with a feedback device and a display and alarm device, and the direct-current motor is connected with a direct-current power source by the feedback device via a control switch. The signal analysis processing module receives the acoustic emission signals which are generated during skull grinding and are detected by the acoustic emission sensor, whether an overheating condition occurs or not is judged, and the rotational speed of the direct-current motor is controlled via the feedback device.
Description
Technical field
The present invention relates to a kind of medical apparatus and instruments, concrete is the online detection of a kind of surgical operation skull grinding temperature and controlled hand-held grinding device.
Background technology
During bone grinding, neurosurgeon treats as passage the patient that basis cranii suffers from cancer by nostril by the method for endoscope's expansion intranasal conventionally.This less invasive techniques in the condition that does not need to disfeature a passage that directly leads to tumor of base of skull is provided.In the process of excision cerebroma, finding and excise pathological changes tumor needs grinding ring widely identify and protect these mainly neural around the bone in optic nerve, cavernous sinus, nervi trigeminus branch.In the process of grinding bone, can produce heat and likely can injured nerve.Such hot injury can cause blind and lose face muscle control ability, owing to lacking heat in bone grinding, is delivered to neural knowledge, so worry very much concerning neurosurgeon.(surpass 50000 and turn per minute) at a high speed miniature bulb skive and can be used for such surgical operation.In bone grinding, the main type of cooling is cooling with normal saline.At the speed of grinding high speed emery wheel rotation and limited operative space, limited the effectiveness of normal saline Cooling and Lubricator together with all.This hot injury from bone grinding adjoins the phenomenon that nerve is generally acknowledged by neurosurgeon.In operation, facial hemiparalysis has been reported up to 3.6% in bone grinding.Abbas and Jones utilize skive to carry out bone grinding experiment in an obduction research, have measured face nerve temperature, and have confirmed neural hot injury.
Nervous tissue is especially easily subject to the impact of high temperature.The initial temperature of tissue injury is approximately 43 degree.In head neck operation, neural hot injury's thing was in the news.Neurosurgeon can not determine the heat producing at emery wheel/bone interface in bone grinding and the heat energy of transferring to bone and adjacent nerve have how many at present.
The apparatus of surgery skull grinding is at present hand-held grinding device; during operation, must rely on abundant clinical experience and the hand of doctor individual to feel to judge grinding force and grinding temperature; when grinding temperature is too high, can adjust grinding wheel speed, make grinding temperature reduce to protect surrounding tissue to escape injury.If while carrying out via the doctor who lacks rich experiences, careless slightly likely when the grinding of surgery skull temperature surpass the critical bearing temperature of surrounding tissue and injure meninges and the nervous tissue below skull.
Summary of the invention
Object of the present invention is exactly for addressing the above problem, the online detection of a kind of surgical operation skull grinding temperature and controlled hand-held grinding device are provided, the degree of accuracy that it is controlled is high, by the acoustic emission signal of monitoring bone grinding, adjust grinding wheel speed, reduce the grinding temperature in grinding bone process, thereby can effectively avoid the hot injury to cerebral tissue.
For achieving the above object, the present invention adopts following technical scheme:
A kind of surgical operation skull grinding temperature is online to be detected and controlled hand-held grinding device, it comprises housing, housing front end is installed emery wheel, emery wheel is connected with direct current generator by actuating device, at emery wheel and housing junction, be provided with calibrate AE sensor, it is connected with the signal analysis and processing module arranging in housing by wire, and signal analysis and processing module is connected with demonstration and alarm device with feedback device respectively, and direct current generator is connected with DC source through gauge tap by feedback device; Acoustic emission signal when signal analysis and processing module receives the bone grinding that calibrate AE sensor detects, judges whether to occur overheat condition, controls the rotating speed of direct current generator by feedback device.
Described calibrate AE sensor comprises: the acoustic matching layer of surface configuration and installed surface conjugation, and realize acoustic emission signal and to sensor, carry out radiation to greatest extent; On acoustic matching layer, have cannelure, ring shape permanent magnet is installed to fix with installed surface within it, between acoustic matching layer and piezoelectric element, by glue line, carry out bonding connection, on piezoelectric element, add that backing is eliminated or reduce the sound wave interface reflection that sees through piezoelectric element and return to once again piezoelectric element and form secondary piezoelectric effect, be wired on joint the signal of telecommunication is exported, acoustic matching layer is connected with outer casing screw and its inner member is fixed, and adopts thread connecting mode to realize and regulates the direction of joint to facilitate wiring.
A rubber sheet gasket is installed on the shell top of described calibrate AE sensor.
Described signal analysis and processing module is mainly by wave filter, main amplifier, and signal picker, signal analyzer forms; Wherein preamplifier is connected with holding wire with wave filter, and wave filter is connected with main amplifier, and main amplifier is connected with signal picker, and signal picker is connected with signal analyzer, and signal analyzer is connected with demonstration and alarm device with feedback device respectively.
The relation that described signal analysis and processing module is directly proportional to bone surface temperature according to the voltage signal of calibrate AE sensor output, by setting threshold, judge that whether bone grinding temperature is too high, when the signal detecting surpasses setting threshold, by feedback device, control the rotating speed of direct current generator.
Described actuating device comprises two-stage transmission:
The first order is gear drive, comprise a driving gear and a driven gear, both engagements, wherein driving gear is arranged on driving gear shaft, driving gear shaft is connected with shaft coupling one end by flat key III, the shaft coupling other end is connected with direct current generator main shaft, and direct current generator is arranged on motor base; Driven gear is arranged on by flat key II on one end of axle, the other end installing sleeve II of axle;
Second level Bevel Gear Transmission, comprises the bevel gear of pair of meshing, and one of them bevel gear is connected with axle by sleeve II, and bevel gear opposite side is provided with retainer nut; Another bevel gear is connected with bevel gear shaft, bevel gear shaft stretches out the part chuck for installing I of housing, and chuck I mono-side is located by the shaft shoulder, then liner II, emery wheel are installed, emery wheel one side is enclosed within on chuck, and emery wheel is chosen identical nominal diameter with chuck axis and adopted the mode of interference fits to install; Emery wheel opposite side is installed liner I and chuck II again, finally with packing ring and nut, clamps.
Deep groove ball bearing III and deep groove ball bearing IV are installed in described driving gear shaft two ends, and two bearings are all realized location by the shaft shoulder and the housing of driving gear shaft.
Described driven gear one side is by the shaft shoulder of axle, opposite side is installed axle sleeve and deep groove ball bearing II, deep groove ball bearing II is by housing location, at axle, near both sides, center, taper roll bearing II and taper roll bearing I are installed, a pair of taper roll bearing adopts the mode of anti-dress to install, and is positioned by housing and the shaft shoulder.
Described bevel gear shaft one side installing sleeve I and deep groove ball bearing I are also located it by housing, and opposite side is installed deep groove ball bearing V, by the shaft shoulder and housing location, are embedded with sealing ring on housing.
The installation position fluting of described deep groove ball bearing V, the diameter of groove is less than the width of deep groove ball bearing V, the diameter of calibrate AE sensor is less than the diameter of groove, calibrate AE sensor is arranged in groove, contact with outer watt of deep groove ball bearing V, the contact site of deep groove ball bearing V is carried out to surface finish scale removal or grease, and with sensor contact surface daubing coupling agent, fill the slight void between contact surface.
The invention has the beneficial effects as follows: the acoustic emission signal producing in wheel grinding process, through signal picker and signal analyzer, obtain a result and pass to feedback device, feedback device judges whether this result surpasses the threshold value of setting, if do not surpassed, direct current generator is normally worked; If surpass threshold value; feedback device provides feedback information and regulates the electric current that is input to direct current generator; reducing electric current reduces DC motor speed; and then grinding wheel speed is reduced; reduced emery wheel to bone active force; realize the reduction of grinding skin temperature, realize and to detect the temperature of grinding skin and to make it can be controlled online, to protect surrounding tissue to escape injury.
Accompanying drawing explanation
Fig. 1 is the cutaway view of Medical surgical hand-held grinding device;
Fig. 2 is calibrate AE sensor installation site enlarged drawing;
Fig. 3 is Novel acoustic-emission sensor;
Fig. 4 is signal analysis and processing module composition diagram;
Fig. 5 is acoustic emission signal transitive graph;
Fig. 6 is acoustic emission signal detection display figure;
Fig. 7 is that acoustic emission signal detects feedback diagram;
Wherein, 1-bevel gear shaft, 2-sleeve I, 3-deep groove ball bearing I, 4-retainer nut, 5-flat key I, 6-bevel gear, 7-sleeve II, 8-taper roll bearing I, 9-axle, 10-housing, 11-taper roll bearing II, 12-flat key II, 13-driven gear, 14-axle sleeve, 15-deep groove ball bearing II, 16-signal analysis and processing module, 17-shows and alarm device, 18-feedback device, 19-gauge tap, 20-screwed hole, 21-motor base, 22-direct current generator, 23-shaft coupling, 24-flat key III, 25-deep groove ball bearing III, 26-driving gear shaft, 27-deep groove ball bearing IV, 28-preamplifier, 29-rubber sheet gasket, 30-calibrate AE sensor, 31-emery wheel, 32-chuck I, 33 liner I, 34-packing ring, 35-nut, 36-chuck II, 37-liner II, 38-sealing ring, 39-deep groove ball bearing V, 40-acoustic matching layer, 41-glue line, 42-piezoelectric element, 43-permanent magnet, 44-backing, 45-joint, 46-shell, 47-signal picker, 48-signal analyzer, 49 wave filter, 50-main amplifier.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention will be further described.
Fig. 1 has shown each ingredient with the hospital handheld formula grinding attachment of temperature measuring equipment, the transmission of its various piece be positioned such that: its middle shell 10 consists of the two halves up and down of symmetry, and be connected and fixed by screwed hole 20 by screw, grinding attachment external direct current power supply, DC source is connected by wire with gauge tap 19, gauge tap 19 is connected by wire with feedback device 18, feedback device 18 is connected with direct current generator 22 use wires, direct current generator 22 is fixed on motor base 21, direct current generator 22 is connected by shaft coupling 23 with driving gear shaft 26, shaft coupling 23 one end are connected and realize axial location with direct current generator main shaft by pin, by concavo-convex cooperation of direct current generator main shaft and shaft coupling 23 realizing circumferential transmission, the other end is connected with driving gear shaft 26 and is realized circumferentially location by flat key III24, driving gear shaft 26 is installed deep groove ball bearing III25 and deep groove ball bearing IV27 at gear two ends, two bearings are all realized location by the shaft shoulder and the housing 10 of driving gear shaft 26, driving gear shaft 26 and driven gear 13 engagements, driven gear 13 is arranged on axle 9, circumferentially locate by flat key II12 with axle 9, driven gear 13 1 sides are by the shaft shoulder of axle 9, opposite side is installed axle sleeve 14 and deep groove ball bearing II15, deep groove ball bearing II15 is by housing 10 location, at axle 9, near both sides, center, taper roll bearing II11 and taper roll bearing I8 are installed, a pair of taper roll bearing adopts the mode of anti-dress to install, and positioned by housing 10 and the shaft shoulder, the first installing sleeve II7 of the other end at axle 9 installs bevel gear 6 again, bevel gear 6 is installed and by flat key I5, realizes circumferential transmission, bevel gear 6 both sides are respectively by sleeve II7 and retainer nut's 4 axial location, bevel gear 6 and bevel gear shaft 1 engaged transmission, bevel gear shaft 1 one side installing sleeve I2 and deep groove ball bearing I3 and by housing 10 to its location, opposite side is installed deep groove ball bearing V39, by the shaft shoulder and housing 10 location, on housing 10, being embedded with sealing ring 38 seals, bevel gear shaft 1 stretches out the part chuck for installing I32 of housing 10, chuck I32 mono-side is by shaft shoulder location, liner II37 is installed again, emery wheel 31, emery wheel 31 has limited three degree of freedom by liner II37 and has comprised a moving sets and two revolute pairs, emery wheel 31 is enclosed within on chuck I32, emery wheel 31 is chosen identical nominal diameter with chuck I32 axle and is adopted the mode of interference fits to install, therefore chuck I32 can limit emery wheel 31 three degree of freedoms and comprises two moving sets and a revolute pair, so emery wheel 31 is located completely, install liner I33 and chuck II36, finally with packing ring 34 and nut 35, clamp.
As Fig. 2, installation position partial enlarged drawing, the installation position of deep groove ball bearing V39 fluting on housing 10, the diameter of groove is less than the width of deep groove ball bearing V39, the diameter of calibrate AE sensor 30 is less than the diameter of groove, calibrate AE sensor 30 is arranged in groove, contact with outer watt of deep groove ball bearing V39, the contact site of deep groove ball bearing V39 is carried out to surface finish scale removal or grease etc., and with sensor contact surface daubing coupling agent, fill the slight void between contact surface, do not make these interstitial micro-airs affect the acoustical coupling effect that penetrated of sound wave, by its transitional function, reduce acoustic wave energy in the reflection loss at this interface, also lubricate reduces the friction between sensor and outer watt, reducing signal disturbs, one rubber sheet gasket 29 is installed on the top of calibrate AE sensor 30, reduce the vibration of calibrate AE sensor 30 and calibrate AE sensor 30 applied to active force to make itself and deep groove ball bearing V39 watt good contact outward, rubber sheet gasket 29 covers on calibrate AE sensor 30 and realizes its location.
As Fig. 3, because outer watt of deep groove ball bearing V39 is shaped as periphery, for with good the contacting of its realization, so new calibrate AE sensor of shape design for contact surface, by acoustic matching layer 40, piezoelectric element 42, permanent magnet 43, backing 44, joint 45 and shell 46 form, as seen from the figure, acoustic matching layer 40 surface configurations are interior concaved circular cambered surface and the outer watt shape conjugation of deep groove ball bearing 39, by acoustic matching layer 40, can realize acoustic emission signal and to sensor, carry out radiation to greatest extent, in addition sensor is played the effect of protection, on acoustic matching layer 40, have cannelure, annular permanent magnnet object is installed is within it sensor is adsorbed on outer watt of deep groove ball bearing V39, between acoustic matching layer 40 and piezoelectric element 42, by glue line 41, carry out bonding connection, select suitable glue line 41 thickness to can greatly improve acoustic energy transmission, glue line 41 can be regarded as to acoustic matching layer and form two matching layers, so just expanded the range of choice of material, on piezoelectric element 42, adding backing 44 eliminates or reduces through the sound wave interface reflection of piezoelectric element 42 and return to once again the secondary piezoelectric effect of piezoelectric element 42 formation, can improve resolution and the signal to noise ratio of sensor, be wired on joint 45 signal of telecommunication is exported, acoustic matching layer 40 is connected by screw thread with shell 46 and its inner member is fixed, the direction that can realize adjusting joint 45 due to the particularity employing thread connecting mode of contact surface shape facilitates wiring.
When emery wheel 31 grinding bone, emery wheel has active force to make to produce grinding temperature to bone to produce acoustic emission signal simultaneously, and it is that q, the length thermal source that is l is with constant speed V that wheel grinding bone can be regarded a heat flow density as
wwhile moving on half infinitely great body surface, the coefficient of heat conduction of establishing bone is λ, and volume specific heat is c
pρ, the mean temperature of bone surface
for:
Condition is L=Vl/ α > 20, and α is thermal diffusivity, α=λ/c
pρ; R is energy proportion coefficient.
Heat source strength q is:
In formula: E
efor than grinding energy; v
wfor work speed; B is polishing width; A is grinding depth.
To in formula (3) substitution formula (2), obtain:
To in formula (4) substitution formula (1), obtain:
By formula (5), can be found out, the mean temperature of bone surface is directly proportional to grinding force, and the grinding force that when mean temperature raises, bone is subject to is larger.
When wheel grinding, producing grinding force acts on bone, bone is due to the effect of the grinding force generation Elastic wave that can release energy fast, the amplitude of elastic wave is relevant with power, and the amplitude of the elastic wave producing when grinding force is larger is just higher, and the oscillating curve of elastic wave is:
In formula: A is parameter; W is the natural frequency of part.
Elastic wave is at emery wheel 31, and chuck II37, has relaxation phenomenon in the transmittance process of bevel gear shaft 1 and each part of deep groove ball bearing V39, and the elastic wave oscillating curve after decay is:
Acoustic emission signal is delivered to chuck I32 with the form of elastic wave by emery wheel 31, bevel gear shaft 1, be delivered to deep groove ball bearing V39, finally be delivered to calibrate AE sensor 30, the size of the calibrate AE sensor 30 generation signals of telecommunication is relevant with elasticity intensity of wave, and acoustic emission signal can be expressed as through calibrate AE sensor 30 output voltages:
V＝g·f·l (8)
In formula: the piezoelectric constant that g is piezoelectric element; F is the suffered stress intensity of sensor; L is piezoelectric element thickness.
Summary formula (1) is known to formula (8), the grinding force of emery wheel 31 effects is directly proportional to bone surface temperature, the voltage signal of calibrate AE sensor 30 outputs is directly proportional to the grinding force of emery wheel 31, i.e. the voltage signal of calibrate AE sensor 30 outputs is directly proportional to bone surface temperature.
After calibrate AE sensor 30 output voltages, need to carry out signal amplification through preamplifier 28, so that signal long-distance transmissions is to signal analysis and processing module 16.
As Fig. 4, signal analysis and processing module 16 is by wave filter 49, main amplifier 50, and signal picker 47, signal analyzer 48 forms.Wherein preamplifier 28 is connected with wave filter 49 use holding wires, wave filter 49 is connected with main amplifier 50, main amplifier 50 is connected with signal picker 47, and signal picker 47 is connected with signal analyzer 48, and signal analyzer 48 is connected with demonstration and alarm device 17 with feedback device 18 respectively.
As shown in Figure 5, in the process of grinding, acoustic emission signal transfer route is that bone retroaction is on emery wheel 31, emery wheel 31 passes to chuck I32, and chuck I32 passes to bevel gear shaft 1, and bevel gear shaft 1 passes to deep groove ball bearing V39, deep groove ball bearing V39 passes to calibrate AE sensor 30, calibrate AE sensor 30 will receive acoustic emission signal like this, causes calibrate AE sensor 30 to produce the signal of telecommunication, and acoustic emission signal is just changed into the signal of telecommunication by calibrate AE sensor 30 like this.
As shown in Figure 6, calibrate AE sensor 30 receives acoustic emission signal and produces the signal of telecommunication, so need to settle preamplifier 28 in the place near calibrate AE sensor 30 because the signal of telecommunication is very faint, the signal of telecommunication transmits after preamplifier amplifies, then device 49 carries out filtering after filtering, discharge background noise etc., again through main amplifier 50 amplification signals, be amplified to and be applicable to the scope that signal picker 47 gathers, through signal picker 47, extract sound emission signal characteristic information, through signal analyzer 48, process and draw end product and show and provide prompting by demonstration and alarm device 17.
As shown in Figure 7, during emery wheel 31 grinding, produce acoustic emission signal through signal picker 47 information extractions, through signal analyzer 48, process and obtain a result, be input to and in feedback device 18, judge whether to meet feedback condition, feedback device is set to a threshold value, when being less than threshold value, feedback device 18 does not provide feedback signal, direct current generator 22 is normally worked, when surpassing threshold value, feedback device 18 provides feedback information, change the electric current that is input to direct current generator 22, making electric current reduce direct current generator 22 rotating speeds reductions finally makes emery wheel 31 rotating speeds reduce, thereby the rotating speed that changes emery wheel 31 reduces the temperature that the active force of 31 pairs of bones of emery wheel reduces grinding skin.
Work process of the present invention is as follows:
Known in conjunction with Fig. 1, switch on power, Closed control switch 19, feedback device 18 judgements realize power supply without feedback information and power to direct current generator 22 by gauge tap 19, direct current generator 22 is normally worked, direct current generator 22 produces power, by direct current generator main shaft, pass to shaft coupling 23, effect by flat key III24 passes to driving gear shaft 26, driving gear shaft 26 and driven gear 13 engaged transmission, by the effect of flat key II12, driven gear 13 by transmission of power to axle 9, by the effect of flat key I5, axle 9 by transmission of power to bevel gear 6, bevel gear 6 is by meshing transmission of power to bevel gear shaft 1, bevel gear shaft 1 passes to chuck I32, chuck II36 and liner II37, liner I33, transmission of power is to emery wheel 31 the most at last, realize rotatablely moving of emery wheel, known in conjunction with Fig. 5, in grinding process, the acoustic emission signal of bone surface is delivered on emery wheel 31, from emery wheel 31, be delivered to chuck I32, chuck I32 is delivered to bevel gear shaft 1, bevel gear shaft 1 is delivered to deep groove ball bearing V39, deep groove ball bearing V39 is delivered to calibrate AE sensor 30, in conjunction with Fig. 6, calibrate AE sensor 30 detects acoustic emission signal and produces the faint signal of telecommunication, through holding wire, be delivered to preamplifier 28, after amplifying, preamplifier 28 transmits, be transferred to wave filter 49, through wave filter 49, get rid of background noises etc. and be transferred to main amplifier 50, the signal of telecommunication is amplified to and is applicable to the scope that signal picker 47 gathers through main amplifier 50, after signal picker 47 and signal analyzer 48 processing, obtaining result shows through demonstration and alarm device 17, when showing that result surpasses a value alarm device of setting and provides alarm, known in conjunction with Fig. 7, the acoustic emission signal producing in emery wheel 31 grinding process, through signal picker 47 and signal analyzer 48, obtain a result and pass to feedback device 18, feedback device 18 judges whether this result surpasses the threshold value of setting, if do not surpass, do not provide feedback information, direct current generator 22 is normally worked, if surpass threshold value, feedback device 18 provides feedback information and regulates the electric current that is input to direct current generator 22, reducing electric current reduces direct current generator 22 rotating speeds, and then emery wheel 31 rotating speeds are reduced, 31 pairs of bone active forces of emery wheel have been reduced, realize the reduction of grinding skin temperature, can realize thus and detect the temperature of grinding skin and make it can be controlled, after grinding completes, bone surface is carried out disinfection and clean, equipment for grinding is carried out disinfection and keep properly.
Claims (9)
1. a surgical operation skull grinding temperature detects and controlled hand-held grinding device online, it comprises housing, housing front end is installed emery wheel, emery wheel is connected with direct current generator by actuating device, it is characterized in that, at emery wheel and housing junction, be provided with calibrate AE sensor, it is connected with the signal analysis and processing module arranging in housing by wire, signal analysis and processing module is connected with demonstration and alarm device with feedback device respectively, and direct current generator is connected with DC source through gauge tap by feedback device; Acoustic emission signal when signal analysis and processing module receives the bone grinding that calibrate AE sensor detects, judges whether to occur overheat condition, controls the rotating speed of direct current generator by feedback device; The relation that described signal analysis and processing module is directly proportional to bone surface temperature according to the voltage signal of calibrate AE sensor output, by setting threshold, judge that whether bone grinding temperature is too high, when the signal detecting surpasses setting threshold, by feedback device, control the rotating speed of direct current generator.
2. surgical operation skull grinding temperature as claimed in claim 1 is online detects and controlled hand-held grinding device, it is characterized in that, described calibrate AE sensor comprises: the acoustic matching layer of surface configuration and installed surface conjugation, and realize acoustic emission signal and to sensor, carry out radiation to greatest extent; On acoustic matching layer, have cannelure, ring shape permanent magnet is installed to fix with installed surface within it, between acoustic matching layer and piezoelectric element, by glue line, carry out bonding connection, on piezoelectric element, add that backing is eliminated or reduce the sound wave interface reflection that sees through piezoelectric element and return to once again piezoelectric element and form secondary piezoelectric effect, be wired on joint the signal of telecommunication is exported, acoustic matching layer is connected with outer casing screw and its inner member is fixed, and adopts thread connecting mode to realize and regulates the direction of joint to facilitate wiring.
3. surgical operation skull grinding temperature as claimed in claim 2 is online detects and controlled hand-held grinding device, it is characterized in that, rubber sheet gasket is installed on the shell top of described calibrate AE sensor.
4. surgical operation skull grinding temperature as claimed in claim 1 is online detects and controlled hand-held grinding device, it is characterized in that, described signal analysis and processing module is mainly by wave filter, main amplifier, and signal picker, signal analyzer forms; Wherein preamplifier is connected with holding wire with wave filter, and wave filter is connected with main amplifier, and main amplifier is connected with signal picker, and signal picker is connected with signal analyzer, and signal analyzer is connected with demonstration and alarm device with feedback device respectively.
5. surgical operation skull grinding temperature as claimed in claim 1 is online detects and controlled hand-held grinding device, it is characterized in that, described actuating device comprises two-stage transmission: the first order is gear drive, comprise a driving gear and a driven gear, both engagements, wherein driving gear is arranged on driving gear shaft, and driving gear shaft is connected with shaft coupling one end by flat key III, the shaft coupling other end is connected with direct current generator main shaft, and direct current generator is arranged on motor base; Driven gear is arranged on by flat key II on one end of axle, the other end installing sleeve II of axle;
Second level Bevel Gear Transmission, comprises the bevel gear of pair of meshing, and one of them bevel gear is connected with axle by sleeve II, and bevel gear opposite side is provided with retainer nut; Another bevel gear is connected with bevel gear shaft, bevel gear shaft stretches out the part chuck for installing I of housing, and chuck I mono-side is located by the shaft shoulder, then liner II, emery wheel are installed, emery wheel one side is enclosed within on chuck, and emery wheel is chosen identical nominal diameter with chuck axis and adopted the mode of interference fits to install; Emery wheel opposite side is installed liner I and chuck II again, finally with packing ring and nut, clamps.
6. surgical operation skull grinding temperature as claimed in claim 5 is online detects and controlled hand-held grinding device, it is characterized in that, deep groove ball bearing III and deep groove ball bearing IV are installed in described driving gear shaft two ends, and two bearings are all realized location by the shaft shoulder and the housing of driving gear shaft.
7. surgical operation skull grinding temperature as claimed in claim 5 is online detects and controlled hand-held grinding device, it is characterized in that, described driven gear one side is by the shaft shoulder of axle, opposite side is installed axle sleeve and deep groove ball bearing II, deep groove ball bearing II is by housing location, at axle, near both sides, center, taper roll bearing II and taper roll bearing I are installed, a pair of taper roll bearing adopts the mode of anti-dress to install, and is positioned by housing and the shaft shoulder.
8. surgical operation skull grinding temperature as claimed in claim 5 is online detects and controlled hand-held grinding device, it is characterized in that, described bevel gear shaft one side installing sleeve I and deep groove ball bearing I are also located it by housing, opposite side is installed deep groove ball bearing V, by the shaft shoulder and housing location, on housing, be embedded with sealing ring.
9. surgical operation skull grinding temperature as claimed in claim 8 is online detects and controlled hand-held grinding device, it is characterized in that, the installation position fluting of described deep groove ball bearing V, the diameter of groove is less than the width of deep groove ball bearing V, the diameter of calibrate AE sensor is less than the diameter of groove, calibrate AE sensor is arranged in groove, contact with outer watt of deep groove ball bearing V, the contact site of deep groove ball bearing V is carried out to surface finish scale removal or grease, and with sensor contact surface daubing coupling agent, fill the slight void between contact surface.
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| EP1712194B1 (en) * | 2004-02-05 | 2009-12-09 | Bti, I+D, S.L. | Tools for low-speed milling without irrigation and with extraction and recovery of tissue particles |
| CN1745721A (en) * | 2005-07-15 | 2006-03-15 | 北京博达高科技有限公司 | Bone-operating ultrasonic knife with expanding function |
| CN203089277U (en) * | 2013-01-28 | 2013-07-31 | 青岛理工大学 | Surgical operation skull grinding temperature on-line detection and controllable handheld type grinding device |
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2013
- 2013-01-28 CN CN201310030327.9A patent/CN103054624B/en active Active
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