CN2509566Y - Digital sensor of print wheel code wheel reading - Google Patents
Digital sensor of print wheel code wheel reading Download PDFInfo
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- CN2509566Y CN2509566Y CN 01254704 CN01254704U CN2509566Y CN 2509566 Y CN2509566 Y CN 2509566Y CN 01254704 CN01254704 CN 01254704 CN 01254704 U CN01254704 U CN 01254704U CN 2509566 Y CN2509566 Y CN 2509566Y
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- reading
- wheel
- character wheel
- contact
- cam
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Abstract
The utility model discloses a digital sensor of print wheel code wheel reading, comprising a machinery counter and number-reading sense switch groups. Six print wheels are arranged along the centre axis of number-reading print wheel in the machinery counter. The cam at one side of the print wheel consists of two arcs with different radius and a smooth-connected transmitting section. Five sensing switches are arrayed in the direction of the radius of the print wheel with a pair of touching points at the top and at the bottom. The touching points are connected with the cam. The special codes of the touching switches of the utility model correspond to the number-reading print wheel to transform the digital signals of the counter into automatic-measured electrical signals. The utility model measures easily and reliably in a unique reading way to overcome the abrasion of the touching point and bad touch caused by the oxygenation. The sensor can be used in the automatic counting of the water meter without resource and the gas meter without resource.
Description
Technical field:
The utility model relates to a kind of digital sensor of character wheel code wheel reading, mechanical type digital signal in the counting gear of mechanical counter is converted into the electric signal of automatic gauge, can be used for the automatic gauge of readings such as passive water meter, passive gas meter, belong to the sensing measurement technical field.
Background technology:
A large amount of at present measuring apparatus of using (water meter, gas meter etc.) read the amount of use by mechanical counter, for the robotization that realizes measuring, need convert metering reading to electric signal, make the form output of continuous data, so that this signal is further processed with electric signal.Adopt more passive measurement method in recent years, when measuring apparatus is worked, need not supply power, show usage readings, supply power when requiring usage readings output by mechanical counter.Have resistance-type to measure and photoelectric type measuring in the passive measurement method, wherein the resistance-type measuring method that generally adopts is whenever to be advanced the rotation drive changes in resistance of a number (0～9) by counting gear, and the difference of resistance value is distinguished different gear readings.When metering, add power supply and reading through realization signals such as follow-up A/D change-over circuits.In actual applications, when measuring apparatus need be used the long period (＞10 years),, make reading that difficulty take place because wearing and tearing or oxidation due to the friction of contact point and surface of contact cause loose contact; Owing to by the measurement actual read number of resistance, need follow-up A/D translation circuit, can not directly export digital pulse signal; As want output pulse signal, also must increase resilient contact.
The utility model content:
The utility model is at the deficiencies in the prior art, and design provides a kind of digital sensor of character wheel code wheel reading of new structure, comprises mechanical counter and reading sensitive switch group two parts.Mechanical counter is the same substantially with conventional counter, its difference is to have increased a cam structure in a side of mechanical reading character wheel, this cam is divided into two parts, 0～180 degree circular arc is called high cam, 180～360 degree circular arcs, be called low cam, the radius of the low cam of the radius of high cam is big, and is selected by practical application, and the junction of high cam and low cam is the smooth transition arc less than 90 degree.
Arrange 6 character wheels along reading character wheel central shaft in the mechanical counter, represent the not numeral of isotopic number respectively,, can enlarge or reduce range ability by increasing or reduce the number of character wheel.The principle of its counting and carry is with the conventional counter that adopts is consistent at present.Circular arc direction at the reading character wheel is mounted with five 36 sensitive switches of spending of being separated by, and the T shape contact of sensitive switch contacts with the cam on the character wheel.A pair of upper and lower contact is arranged in each sensitive switch, draw lead, constitute a switch from upper and lower contact.
When character wheel rotated, the contact of sensitive switch was inwardly done or outwards motion by the stressing influence of the different arc radius of cam, that is to say that when contact touched high cam, contact was to the internal motion of switch; When contact left high cam, because the retroaction of switch contained spring, contact contacted to the external movement of switch and with low cam.The inner upper contact of to-and-fro movement drive of contact contacts with lower contact or disconnects, and makes switch be in " contact " or " disconnection " state.
It is reciprocating that character wheel rotates five switches set contacts of (cam rotation) drive, obtains one group and the corresponding on off state coding of character wheel reading.Rationally arrange reading on the character wheel, be not difficult to obtain the following relationship of character wheel reading and switches set:
Switch contact is in " contact " state and is called for short " closing ", and switch contact is in " disconnection " state and is called for short " opening "
| The character wheel reading | The switches set state |
| 0 | Kai Kaikaikaikai |
| 1 | The Kai Kaikai folding |
| 2 | Opening folding closes |
| 3 | Folding is closed |
| 4 | Folding is closed |
| 5 | Close |
| 6 | Run jointly |
| 7 | Close and run jointly open |
| 8 | Run jointly and open |
| 9 | Run Kai Kaikai jointly |
The method that reads the character wheel reading is to convert former character wheel reading 0,1,2,3,4,5,6,7,8,9 to one group of five two-value sign indicating numbers, and the five-bit code of each reading correspondence is by 0000011111 decision of one group of reflected code.With numeral 0 usefulness coding " 00000 " expression, promptly get the Far Left five-bit code of reflected code, during the adjacent variation of reading, the window that is equivalent to five circulates one to the right, gets interior five of window and obtains the corresponding coding of character wheel reading, and the distinguishing feature of reflected code is, adjacent code word only differs a binary code, the state of five switches only changes one at every turn in sensor, can avoid in the reading transfer process (0 to 1,1 to 2 like this, 2 to 3,, 8 to 9,9 to 0) and the mess code phenomenon that may occur.Analyze theoretically, change cam structure,, get 4 of length of window and also can realize with reflected code 0000111101, sensitive switch on every character wheel is four, but can't avoid in the reading transfer process (0 to 1,1 to 2,2 to 3,, 8 to 9,9 to 0) and the mess code phenomenon that may occur.
The motion of sensitive switch is translation, does not have friction between conductive contact.When producing, make the conduction upper and lower contact with antirust conductive material (stainless steel etc.) and get final product.T type contact and character wheel cam have certain friction, after the long period work, has certain wearing and tearing S, by control conduction upper contact and conduction lower contact clearance D elt, low cam radius R2 and the high cam radius R1 when the contactless state, can solve wear problem, concern as follows:
R1-R2-S＞Delt
The utility model is corresponding with the character wheel reading with the specific coding of touch switch combination, mechanical type digital signal in the counting gear of mechanical counter is converted into the electric signal of automatic gauge.Because there is not the friction of switch in the unique design of read method, thereby can effectively overcome the loose contact that contact point weares and teares or oxidation causes.The counting gear structure that the present invention adopts makes mechanical reading transfer state measurement to, and its output is converted into pulse code signal and directly carries out digital processing, need not follow-up A/D translation circuit.The utility model device makes the measurement of state simple and reliable, and it is long to satisfy service time, and the occasion of circumstance complication can be used for the automatic gauge of readings such as passive water meter, passive gas meter.Drawing explanation and embodiment:
Fig. 1 is the utility model structural representation.
The structural representation of observing from character wheel reading direction shown in the figure.The utility model comprises mechanical counter and reading sensitive switch group two parts, arrange 6 character wheels along reading character wheel central shaft (6) in the mechanical counter, wherein the 6th character wheel is 0.1 digit order number, and other character wheel is represented unit numbers, tens word, hundred bit digital, kilobit numeral and myriabit numeral respectively.By increasing or reduce the number of character wheel, can enlarge or reduce range ability.The principle of its counting and carry is with the conventional counter that adopts is consistent at present.
Side at character wheel (1) has a cam (2) with two different radii circular arcs and smooth transition section, and power wheel (3) links to each other with the transmission gear (5) of character wheel by transmission shaft (4), and the numeral that power wheel (3) is used between adjacent character wheel changes driving.Except that the expression 0.1 digit order number the 6th character wheel, the radial direction of other character wheel is mounted with five sensitive switches (8), adjacent sensitive switch be separated by 36 the degree.
Character wheel reading sensitive switch (8) comprises T type contact head (7), two compression springs (9,12), upper contact (10) and lower contact (11).The T shape contact (7) of sensitive switch contacts with character wheel overhead cam (2), T shape contact (7) and upper contact (10) one, compression spring (9) is enclosed within on the upper contact (10), and compression spring (12) is arranged under the lower contact (11), and upper contact (10) and lower contact (11) are the anti-rust metal conductor.Draw lead from upper contact (10) and lower contact (11), constitute a switch.
When character wheel (1) rotated, switch contact (7) was inwardly done or outwards motion by the stressing influence of the different arc radius of cam (2), thereby drive upper contact (10) contacts with lower contact (11) or disconnects.By the spring pressure in the by-pass cock, the influence that may command T type contact head (7) rotates character wheel.
Fig. 2 is the relative position synoptic diagram of character wheel and sensitive switch in the utility model.
The structural drawing of observing from the character wheel axis direction shown in the figure.Cam (2) by the high cam (13) of two different radiis, low cam (14) and between smooth transition section (15) form.Radial direction at character wheel (1) is arranged with five sensitive switches (8), adjacent sensitive switch 36 degree of being separated by, and the T shape contact (7) of sensitive switch contacts with cam (2) on the character wheel.Power wheel (3) links to each other with character wheel transmission gear (5) by transmission shaft (4).
Claims (3)
1, a kind of digital sensor of character wheel code wheel reading, it is characterized in that comprising mechanical counter and reading sensitive switch group, be furnished with character wheel (1) along reading character wheel central shaft (6) in the mechanical counter, power wheel (3) links to each other with the transmission gear (5) of character wheel by transmission shaft (4), side at character wheel (1) has the cam (2) with two different radii circular arcs and smooth transition section, be arranged with sensitive switch (8) and contact in the circular arc direction of character wheel (1), draw lead from the upper contact (10) of sensitive switch (8) and lower contact (11) and constitute switch with cam (2).
2, as the digital sensor of the said character wheel code wheel reading of claim 1, it is characterized in that in the sensitive switch (8), the switch T shape contact (7) that contacts with cam (2) is an one with upper contact (10), compression spring (9) is enclosed within on the upper contact (10), and compression spring (12) is arranged under the lower contact (11).
3, as the digital sensor of the said character wheel code wheel reading of claim 1, it is characterized in that being furnished with six character wheels (1) along character wheel central shaft (6), be arranged with the sensitive switch (8) of five 36 degree of being separated by at the radial direction of character wheel (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01254704 CN2509566Y (en) | 2001-11-15 | 2001-11-15 | Digital sensor of print wheel code wheel reading |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01254704 CN2509566Y (en) | 2001-11-15 | 2001-11-15 | Digital sensor of print wheel code wheel reading |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2509566Y true CN2509566Y (en) | 2002-09-04 |
Family
ID=33663969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01254704 Expired - Fee Related CN2509566Y (en) | 2001-11-15 | 2001-11-15 | Digital sensor of print wheel code wheel reading |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2509566Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007121620A1 (en) * | 2006-04-24 | 2007-11-01 | Ange Zhang | A contactless read out sensor for mechanical character wheel counter |
| CN102306332A (en) * | 2011-07-26 | 2012-01-04 | 杭州柯林电力设备有限公司 | Mechanical digital wheel value reading device |
| CN108180958A (en) * | 2018-03-01 | 2018-06-19 | 北京优耐燃气仪表有限公司 | A kind of gas meter counting mechanism and gas meter, flow meter |
-
2001
- 2001-11-15 CN CN 01254704 patent/CN2509566Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007121620A1 (en) * | 2006-04-24 | 2007-11-01 | Ange Zhang | A contactless read out sensor for mechanical character wheel counter |
| CN102306332A (en) * | 2011-07-26 | 2012-01-04 | 杭州柯林电力设备有限公司 | Mechanical digital wheel value reading device |
| CN108180958A (en) * | 2018-03-01 | 2018-06-19 | 北京优耐燃气仪表有限公司 | A kind of gas meter counting mechanism and gas meter, flow meter |
| CN108180958B (en) * | 2018-03-01 | 2023-12-01 | 北京优耐燃气仪表有限公司 | Gas meter counting mechanism and gas meter |
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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 |