CN2367273Y - Signal device of moveable force-measuring instrument for tooth - Google Patents
Signal device of moveable force-measuring instrument for tooth Download PDFInfo
- Publication number
- CN2367273Y CN2367273Y CN 99203349 CN99203349U CN2367273Y CN 2367273 Y CN2367273 Y CN 2367273Y CN 99203349 CN99203349 CN 99203349 CN 99203349 U CN99203349 U CN 99203349U CN 2367273 Y CN2367273 Y CN 2367273Y
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- CN
- China
- Prior art keywords
- resistance
- microvolt
- amplifier
- flexible member
- operational amplifier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
The utility model discloses a signal device of a moveable force-measuring instrument for teeth, comprising a casing. The casing is provided with a sensor and a microvolt amplifier, the sensor is an elastic element, the two ends of the sensor form a strip shape, and the middle part of the sensor forms a ring shape. An end head at the lower end of the elastic element is provided with a screw connected with a force-measuring contact, and four resistive strain elements are adhered inside and outside a circular ring at the middle position of the sensor. The strain elements produce electrical quantity signals according to the stressed deformation of the elastic element, and the electrical quantity signals are output from an OUT end and enters the input end IN of the microvolt amplifier and are amplified with microvolt. The utility model has the advantage of simple structure, and the digital measurement of the movable force of teeth becomes possible, and the force-measuring precision is increased.
Description
This utility model belongs to a kind of electric signaling device, relates to a kind of advertiser that tooth moves dynamometer that is used for.
At present, the device that is used to measure the tooth locomotivity that the dentist uses is normally introduced external a kind of spring scale formula tooth and is moved then power meter, and its dynamometry precision is not high, easily causes personal error, uses also inconvenient.Particularly the dynamometry scope is not utilized clinically at present as yet at the more accurate digital dynamometry instrument of 0.01-20N, and what wherein determine the dynamometer precision is the electric signaling device that provides for it.
The purpose of this utility model provides a kind of simple in structure, advertiser that tooth moves dynamometer that is used for that can improve dynamometer dynamometry precision and operating efficiency.
The purpose of this utility model adopts following technical scheme to realize: described advertiser comprises a housing, be provided with the big circuit of a pick off and a microvolt in the housing, pick off is that two ends are strip, middle flexible member in the form of a ring, there is a hole that is used for fixing flexible member flexible member upper end, the screw that one connection dynamometry contact is arranged on the termination, lower end of flexible member, inside and outside on the annulus of pick off middle part, be bonded with four resistive strain gauge elements, four strain gauge elements are bridge-type and connect, enter into the input of microvolt amplifying circuit from the electric quantity signal of strain gauge element, signal is output to the digital display gauge outfit after amplifying.
Described microvolt amplifier circuit mainly is made up of operational amplifier ICL7650 and peripheral Resistor-Capacitor Unit thereof, the filter circuit of forming through resistance R 1, capacitor C 1 from the signal of pick off connects a resistance R 2 one ends, resistance R 2 another termination one resistance R 7.1, in the two ends of resistance R 7.1 capacitor C 4 in parallel, a termination operational amplifier input cathode in parallel, the outfan of another termination operational amplifier.The operational amplifier input cathode meets potentiometer W2 by a resistance R 5, potentiometer W2 one end meets a two-way correction voltage circuit E by resistance R 4, the other end is by a resistance R 9 ground connection, the positive pole of operational amplifier input is by resistance R 6 ground connection, and the outfan of operational amplifier connects the digital display gauge outfit by resistance R 8.
In order to limit stressed hyperelastic deformation when excessive of flexible member, long trough limit power hole is set in the lower end of flexible member, limit power can be placed a hard gag lever post in the middle of the hole, and the gag lever post two ends are positioned on the housing.
Resistance R 7.1 in the described microvolt amplifier circuit is composed in series by resistance R 7 and trimmer potentiometer W1, and it is 180dB that the ratio of resistance R 1+R2 and resistance R 7.1 makes amplifier magnification ratio.
Correction voltage circuit E in the described microvolt amplifying circuit, form by power vd D and resistance R 3 and bi-directional voltage stabilizing pipe D3, the utmost point of stabilivolt D3 meets power vd D by resistance R 3, junction point connecting resistance R4 one end of stabilivolt D3 and resistance R 3, another utmost point ground connection of stabilivolt D3 makes gauged Control of Voltage at 1.5V.
In sum, this utility model is simple in structure, and is cheap, makes the digitized measurement of tooth locomotivity become possibility, makes the dentist improve operating efficiency, the artificial error in reading when having exempted with weight beam again.
Below in conjunction with embodiment this utility model is further described:
Fig. 1 is a sensor construction sketch map of the present utility model.
Fig. 2 is the strain gauge element connection diagram among Fig. 1.
Fig. 3 is microvolt amplifier circuit theory diagrams of the present utility model.
Described advertiser comprises a housing, is provided with a pick off (Fig. 1) and a microvolt amplifier circuit (Fig. 3) in the housing.Pick off as shown in Figure 1 is that two ends are strip, middle flexible member 1 in the form of a ring, there is a hole 1.1 that is used for fixing flexible member flexible member 1 upper end, the lower end of flexible member is provided with flute profile limit power hole 1.2, can place a hard gag lever post in the middle of the limit power hole 1.2, the two ends of gag lever post are positioned on the housing.Be used to limit stressed hyperelastic deformation when excessive of flexible member 1.There is the screw 1.3 of a connection dynamometry contact termination, flexible member 1 lower end, be bonded with four resistive strain gauge elements 2,3,4,5 inside and outside on the annulus of pick off middle part, as shown in Figure 2, four strain gauge elements are bridge-type and connect, it connects a DC8 dc source, and strain gauge element 2,3,4,5 signal of telecommunication that distortion produces when stressed with flexible member 1 carries out the microvolt amplification by the microvolt amplifier input IN end that OUT outputs to as shown in Figure 3.
Microvolt amplifier circuit as shown in Figure 3 is made of operational amplifier ICL7650 and some resistor-capacitor units, one end ground connection of its input IN end, parallel diode D1, D2 between two ends, filter circuit connecting resistance R2 one end of forming through resistance R 1, capacitor C 1 from the signal of pick off, resistance R 2 another termination one resistance R 7.1, in the two ends of resistance R 7.1 capacitor C 4 in parallel, the termination operational amplifier ICL7650 input cathode that resistance R 7.1 and capacitor C 4 are in parallel, the outfan of another termination operational amplifier ICL7650.Resistance R 7.1 is composed in series by a resistance R 7 and a trimmer potentiometer W1, and it is 180dB that the ratio of resistance R 1+R2 and resistance R 7.1 makes amplifier magnification ratio.Operational amplifier ICL7650 input cathode meets potentiometer W2 by a resistance R 5, potentiometer W2 one end meets a two-way correction voltage circuit E by resistance R 4, the other end is by a resistance R 9 ground connection, the positive pole of operational amplifier ICL7650 input is by resistance R 6 ground connection, and the outfan of operational amplifier ICL7650 connects the digital display gauge outfit by resistance R 8.Described correction voltage circuit E is made up of power vd D, resistance R 3 and bi-directional voltage stabilizing pipe D3, the utmost point of stabilivolt D3 meets power vd D by resistance R 3, junction point connecting resistance R4 one end of stabilivolt D3 and resistance R 3, another utmost point ground connection of stabilivolt D3 makes gauged Control of Voltage on the 1.5V point.
During use, the dynamometry contact is contained in the screw 1.3 on the flexible member 1 lower end end, strain gauge element 2,3,4,5 produces electric quantity signal with the flexible member stress deformation, this electric quantity signal is servo carries out the microvolt amplification for input IN end shown in Figure 3, the last exportable digital display gauge outfit of giving of amplifying signal, the digital display gauge outfit demonstrates the size of institute's dynamometry.
Claims (5)
1, a kind ofly be used for the advertiser that tooth moves dynamometer, comprise a housing, it is characterized in that: be provided with a pick off and a microvolt amplifier in the housing, pick off is that two ends are strip, middle flexible member (1) in the form of a ring, there is a hole (1.1) that is used for fixing flexible member (1) flexible member (1) upper end, the lower end end of flexible member (1) is provided with the screw (1.3) of a connection dynamometry contact, inside and outside on the annulus of pick off middle part, be bonded with four resistive strain gauge elements (2,3,4,5), four strain gauge elements (2,3,4,5) be bridge-type and connect, the input IN end that the electric quantity signal that strain gauge element produces with flexible member (1) the dynamics force deformation of being subjected to enters into microvolt amplifier by OUT output carries out microvolt and amplifies.
2, according to claim 1ly be used for the advertiser that tooth moves dynamometer, it is characterized in that: described microvolt amplifier is made up of operational amplifier (ICL7650) and peripheral Resistor-Capacitor Unit thereof, from the signal of pick off through resistance R 1, filter circuit connecting resistance R2 one end that capacitor C 1 is formed, resistance R 2 another termination one resistance R 7.1, in the two ends of resistance R 7.1 capacitor C 4 in parallel, the input cathode of the termination operational amplifier (ICL7650) that resistance R 7.1 and capacitor C 4 are in parallel, the outfan of another termination operational amplifier, the operational amplifier input cathode meets a potentiometer W2 by a resistance R 5, potentiometer W2 one end connects a two-way correction voltage circuit E other end by a resistance R 9 ground connection by resistance R 4, the positive pole of operational amplifier input is by resistance R 6 ground connection, and the outfan of operational amplifier connects dynamometer digital display gauge outfit by resistance R 8.
3, according to claim 1ly be used for the advertiser that tooth moves dynamometer, it is characterized in that: long trough limit power (1.2) is set in the lower end of flexible member, and limit power can be placed a hard gag lever post in the middle of the hole, and the gag lever post two ends are positioned on the housing.
4, describedly be used for the advertiser that tooth moves dynamometer according to claim 1,2, it is characterized in that: the resistance R 7.1 in the described microvolt amplifier circuit is composed in series by a resistance R 7 and a trimmer potentiometer W1, and it is 180dB that the ratio of resistance R 1+R2 and resistance R 7.1 makes amplifier magnification ratio.
5, describedly be used for the advertiser that tooth moves dynamometer according to claim 1,2, it is characterized in that: the correction voltage circuit E in the described microvolt amplifier circuit is made up of power vd D and resistance R 3 and bi-directional voltage stabilizing pipe D3, the utmost point of stabilivolt D3 meets power vd D by resistance R 3, junction point connecting resistance R4 one end of stabilivolt D3 and resistance R 3, another utmost point ground connection of stabilivolt D3 makes gauged Control of Voltage at 1.5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99203349 CN2367273Y (en) | 1999-02-05 | 1999-02-05 | Signal device of moveable force-measuring instrument for tooth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99203349 CN2367273Y (en) | 1999-02-05 | 1999-02-05 | Signal device of moveable force-measuring instrument for tooth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2367273Y true CN2367273Y (en) | 2000-03-08 |
Family
ID=33998490
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99203349 Expired - Fee Related CN2367273Y (en) | 1999-02-05 | 1999-02-05 | Signal device of moveable force-measuring instrument for tooth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2367273Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106880412A (en) * | 2017-03-22 | 2017-06-23 | 浙江中医药大学 | A kind of pulling force observing and controlling correction neckstrap |
-
1999
- 1999-02-05 CN CN 99203349 patent/CN2367273Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106880412A (en) * | 2017-03-22 | 2017-06-23 | 浙江中医药大学 | A kind of pulling force observing and controlling correction neckstrap |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |