CN1415931A

CN1415931A - Rolling digital displayed capacitor caliper with

Info

Publication number: CN1415931A
Application number: CN 02145659
Authority: CN
Inventors: 赵志强; 赵飙
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-10-22
Filing date: 2002-10-22
Publication date: 2003-05-07
Also published as: WO2004038323A1; AU2003275522A1

Abstract

This invention relates to a condenser digital display caliber rule which is to turn the linear relative shifts of a primary and a sub rule into angle shift of a roller to be converted into electric signal via emitter plate, receiving electrode plate and grid plate then to be processed by digit-to-analog conversion circuit and single chip processor to display the displacement on screen in digits, and a closed cavity is formed between the case and base with the emitter plate, receiver electrode plate, grid plate, digit-to-analog conversion circuit, single chip, cell display screen, function keys in it, all elements are isolated from outside having the effect if dust-proof, oil-proof and water-proof.

Description

Rolling electric capacity digital display calliper

Technical field:

The present invention relates to a kind of Capacitive Digital Display Vernier Callipers.

Background technology:

The digital display calliper of making of the capacitance displacement sensor principle has convenient reading, and the resolution advantages of higher is widely used.Its major defect is that the environmental baseline of using is had relatively high expectations, be air-gap between the major and minor grid, invade the pollutants such as oil, water and dust that specific inductive capacity is different from air-gap in air-gap, capacitance will change, thereby have influence on the reliability and the accuracy of measured value, damage even.Greatly limited applying of electric capacity digital display calliper.In order to overcome the above-mentioned shortcoming of electric capacity digital display calliper, people such as Cerhand, Andermo have made various effort in US Patent No 5.172485 among Chinese patent CN1114412A, the CN1147084A, but all not yet in effect addressing this problem.In 1998 people's such as Mr. Chen Qiliang patent CN2337526Y " a kind of Capacitive Digital Display Vernier Callipers " proposes a kind of employing gear ﹠ rack structure and changes straight-line displacement into angular displacement, and it is angular displacement sensor is hermetically sealed, preferably resolve the problems referred to above, but its structure school complexity, cost are higher, the equipment technology difficulty is bigger, run into no small problem in industrialization.

Technology contents:

The objective of the invention is to overcome the deficiency of existing method, seek a kind of simple in structure, cost of manufacture is low, good manufacturability and can effectively solve the electric capacity digital display calliper to the pollutant sensitive issue, can be in pollutant environment such as oil, water and dust the highly reliable electric capacity digital display calliper of reliably working.

Technical scheme of the present invention is:

1, a slide rail is installed on the main scale of slide calliper rule, one base is installed on secondary chi, the bearing of one band roller bearing is housed on the base, roller bearing relies on two bearings to be installed on the bearing, and roller bearing one end extends out by the hole on the base, is pressed on the main scale slide rail by the extension of elastomeric objects with roller bearing on the bearing, because the effect of friction force, when main scale and secondary chi relative motion, roller bearing is done the rolling of no slippage on slide rail, the relative straight-line displacement between the major and minor chi is converted to the angular displacement of roller bearing.

2, emission pole plate and reception pole plate are installed on the bearing on the above-mentioned base, there is in the middle of the two-plate pad to keep working clearance between them, launching pole plate and accepting to install between the pole plate one with the synchronous screen that rotates of roller bearing, rotation by screen makes the electric signal of accepting on the pole plate take place clocklike to change, and this signal becomes digital signal by the digital-to-analog conversion integrated circuit and is sent to enterprising row operation of single-chip microcomputer and processing again.

3, a case is installed on above-mentioned base, junction at case and base all is equipped with sealing joint strip, roller bearing perforation place at base, be equipped with an O-ring seal between base and the bearing, thereby between case and base, form a closed cavity, the emission pole plate, accept pole plate, screen, D/A converting circuit, single-chip microcomputer, battery, display screen, function button etc. and be placed in this cavity, all elements are hedged off from the outer world, play grease proofing, dustproof, good waterproof effect.

The present invention's advantage compared with prior art is:

1, rolling friction is paid simple in structurely than gear pair, and cost of manufacture is low.

2, launch pole plate, accept elements such as pole plate, screen, D/A converting circuit, single-chip microcomputer, battery, display screen, function button by the sealing of base and case, effectively solve the electric capacity digital display calliper to the pollutant sensitive issue

3, emission pole plate and reception pole plate are fixture, and the working clearance between them stablizes constant, and the grid sheet rotates, the grid sheet is beated does not influence its working clearance, greatly reduces the influence of kinematic accuracy to the sensor measurement precision.

Description of drawings of the present invention

Fig. 1 is a front view of the present invention

Fig. 2 is that A-A of the present invention is to cut-open view

Fig. 3 is that B-B of the present invention is to cut-open view

Fig. 4 is that C-C of the present invention is to cut-open view

It below is preferred embodiment with reference to the accompanying drawings to describe the present invention.

As Fig. 1,2,3, the present invention includes main scale (1) shown in 4, secondary chi (2), case (3) shows glass pane (4), battery cover (5), slide rail (6), pit gauge bar (7), function button (8), accept pole plate (9), screen (10), emission pole plate (11), bearing pressing plate (12), bearing (13), function wiring board (14), base (15), sealing joint strip (16), O-ring seal (17), bearing plate (18), bearing (19), roller bearing (20), pad (21), dust blowing sheet (22), holddown spring (23), display screen (24), battery (25), cell sealing cushion rubber (26) etc., wherein be fixed with a slide rail (6) on the main scale (1), one groove is arranged in the middle of the secondary chi (2), base (15) is positioned on and forms a passage on the groove of secondary chi (2), main scale (1) passes this passage, make secondary chi (2) on the length direction of main scale (1), do relative motion, the groove that sealing around is arranged on the base (15), bearing (13) is placed in the groove, and the size of the length direction of groove and bearing (13) are of a size of and are slidingly matched, bearing (13) can move forward and backward in groove, but can move left and right, there is a bearing pressing plate (12) that it is limited in the groove above the bearing (13), to prevent bearing (13) play up and down, emission pole plate (11) and one receives pole plate (9) and is fixed on the bearing (13), emission pole plate (11) and one receives between the pole plate (9) and is lined with an annular gasket (21), an emission pole plate (11) and a distance that receives pole plate (9) are fixed, emission pole plate (11) and one receives the screen (10) that a circle is arranged between the pole plate (9), screen (10) can receive between the pole plate (9) at emission pole plate (11) and and freely rotate, one through hole is arranged in the middle of bearing, two pieces of bearings (19) are housed in the hole, be installed with a roller bearing (20) in the middle of the bearing (19), the outer ring of bearing (19) and inner ring are wringing fit with bearing (13) and roller bearing (20) respectively, one spring washer (27) is arranged between the two bearings (19), the outer end of two bearings (19) uses base (15) and bearing plate (18) to compress respectively, to prevent bearing (19) play and the gap of elimination bearing (19) own in the hole, the through hole that one end of roller bearing (20) passes base (15) extends out, its extension contacts roller bearing (20) with slide rail (6) on the main scale (1) the other end passes bearing plate (18), the screen (10) that termination and emission pole plate (11) and one receive between the pole plate (9) is fixing, screen (10) rotates synchronously with roller bearing (20), perpendicular to main scale (1), secondary chi (2) relatively moves has a holddown spring (23) between the direction upper bed-plate (15) of direction and the bearing (13), make on the bearing (13) roller bearing (20) all the time with slide rail (6) close contact on main scale (1), can effectively prevent between roller bearing (20) and the slide rail (6) sliding phenomenon to take place, we can be clearly seen that by above description, when main scale (1) and secondary chi (2) when relatively moving, roller bearing (20) on slide rail (6) on the main scale (1) and the secondary chi (2) also can relatively move, because roller bearing (20) is sliding contact with slide rail (6), with bearing (13) is to roll to contact, the friction force of well-known sliding contact will be much larger than the friction force of the contact of rolling, so roller bearing (20) only can be gone up at slide rail (6) and roll, and equaling the girth of roller bearing (20), the distance that straight line moves multiply by the number of turns of rotation, like this we can be easily be the angle displacement of roller bearing (20) with the displacement conversion of rectilinear direction, and the angle displacement of roller bearing (20) is become the variation that receives the electric signal on the pole plate (9) by the screen (10) that rotates synchronously with roller bearing (20), again electric signal is converted to digital signal by the digital-to-analog conversion integrated circuit of accepting on the pole plate (9), and send the single-chip microcomputer on the function circuit (14) to by lead (or conduct electricity soft band), by single-chip microcomputer result is sent to display screen or by function button (8) single-chip microcomputer made operational order by lead (or conduct electricity soft band).

Fig. 2 for another example, 3, on 4 institute's bases that are shown in (15) case (3) is arranged, glass pane of showing (4) and battery cover (5) are arranged on the case (3), show that glass pane (4) is bonding with fluid sealant or other water proof type bonding agents and case (3), available draw-in groove of battery cover (5) or screw are connected with case (3), in battery cover (5) and case (3) junction one cell sealing cushion rubber (26) is arranged, case also has key hole on (3), function button (8) is made by rubber, its shirt rim is an O-ring seal, can prevent oil, water or other materials enter in the case (3) by key hole, case (3) is equipped with sealing joint strip (16) with the junction of base (15), roller bearing perforation place at base (15), also be equipped with O-ring seal (17) between base (15) and the bearing (13), thereby between base (15) and case (3), form a closed cavity, emission pole plate (11), accept pole plate (9), screen (10), D/A converting circuit, single-chip microcomputer, battery (25), display screen (24), function button (8) etc. is placed in this cavity, all elements are hedged off from the outer world, play grease proofing, dustproof, good waterproof effect.Pit gauge bar (7) and dust blowing sheet (22) are installed in the bottom of base (15), pit gauge bar (7) can be used for step and depth survey, dust blowing sheet (22) is positioned at the both sides of roller bearing (20), at main scale (1), secondary chi (2) when relatively moving, dust blowing sheet (22) plays the effect of cleaning slide rail (6), in case the dust of on-slip rail (6) influences the accuracy of measurement data.

Claims

1, a kind of Capacitive Digital Display Vernier Callipers, by main scale, secondary chi, D/A converting circuit, single-chip microcomputer, parts such as emission pole plate and reception pole plate constitute, it is characterized in that comprising: a slide rail is installed on the main scale of slide calliper rule, one base is installed on secondary chi, the bearing of one band roller bearing is housed on the base, roller bearing relies on two roller bearings to hold and is installed on the bearing, roller bearing one end extends out by the hole on the base, be pressed on the main scale slide rail by the extension of elastomeric objects roller bearing on the bearing, because the effect of friction force, when main scale and secondary chi relative motion, roller bearing is done the rolling of no slippage on slide rail, and roller bearing drives the screen that is fixed on the roller bearing other end simultaneously and rotates synchronously.

2, according to claims 1 described electric capacity digital display calliper, it is characterized in that: the emission pole plate is installed on the bearing on the above-mentioned base and receives pole plate, there is in the middle of the two-plate pad to keep working clearance between them, launching pole plate and accepting to install between the pole plate one with the synchronous screen that rotates of roller bearing, the rotation of screen makes the electric signal of accepting on the pole plate take place clocklike to change, and this signal becomes digital signal by the digital-to-analog conversion integrated circuit and is sent to enterprising row operation of single-chip microcomputer and processing again.

3, according to claims 1 described electric capacity digital display calliper, it is characterized in that: a case is installed on above-mentioned base, junction at case and base all is equipped with sealing joint strip, roller bearing perforation place at base, be equipped with an O-ring seal between base and the bearing, thereby between case and base, form a closed cavity, the emission pole plate, accept pole plate, screen, D/A converting circuit, single-chip microcomputer, battery, display screen, function button etc. and be placed in this cavity.