CN203689450U - Piezoelectric ceramic type intrinsically safe keyboard for underground coal mine - Google Patents
Piezoelectric ceramic type intrinsically safe keyboard for underground coal mine Download PDFInfo
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- CN203689450U CN203689450U CN201420016307.6U CN201420016307U CN203689450U CN 203689450 U CN203689450 U CN 203689450U CN 201420016307 U CN201420016307 U CN 201420016307U CN 203689450 U CN203689450 U CN 203689450U
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- keyboard
- piezoelectric ceramic
- photoelectrical coupler
- coal mine
- intrinsically safe
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Abstract
The utility model relates to a piezoelectric ceramic type intrinsically safe keyboard for an underground coal mine. The piezoelectric ceramic type intrinsically safe keyboard for the underground coal mine is mainly characterized by comprising a keyboard rear cover, a pressing plate, piezoelectric ceramic keys, a protective plate and a plastic flexible film, wherein the pressing plate is fixedly installed on the keyboard rear cover, the piezoelectric ceramic keys are installed on the pressing plate, the protective plate is installed on the piezoelectric ceramic keys, the protective plate is covered with the plastic flexible film, and a keyboard circuit is installed in the keyboard rear cover; on one hand, the keyboard circuit is connected with the piezoelectric ceramic keys; on the other hand, the keyboard circuit is connected with an upper computer for communication. According to the piezoelectric ceramic type intrinsically safe keyboard, the design is reasonable, the piezoelectric ceramic keys are used as a body of the intrinsically safe keyboard, the intrinsic safety of the keyboard is achieved through front and rear signal isolation and selection of an intrinsically safe power source, and it is guaranteed that the keyboard can be applied to the environment with explosive gas dust. The piezoelectric ceramic type intrinsically safe keyboard for the underground coal mine has the advantages of being long in service life, light in weight, resistant to corrosion and abrasion, free of pollution and the like.
Description
Technical field
The utility model belongs to colliery downhole equipment technical field, especially a kind of for the piezoelectric ceramic type essential safe type keyboard under coal mine.
Background technology
At present the input equipment under coal mine is divided into two kinds of essential safe type and flame-proof types, wherein, essential safe type keyboard, as the requisite input equipment of man-machine interface, has the advantages such as easy and simple to handle, power input is low, under coal mine, is widely used.But, in input equipment under existing coal mine, be generally mechanical keyboard, the problem of its existence mainly contains the following aspects: accommodative ability of environment is low, easily by dust pollution, have that the mechanical wear of contact, anti-interference are poor, control circuit process complicated, the life-span is short, button reaction is sensitive not etc.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of reasonable in design, adaptable, button flexibly and long service life for the piezoelectric ceramic type essential safe type keyboard under coal mine.
The utility model solves existing technical matters and takes following technical scheme to realize:
A kind of for the piezoelectric ceramic type essential safe type keyboard under coal mine, comprise keyboard bonnet, pressing plate, Piezoceramic press key, backplate and plastics mantle, described pressing plate is packed on keyboard bonnet, described Piezoceramic press key is arranged on pressing plate, described backplate is arranged on Piezoceramic press key, described plastics mantle covers on backplate, in keyboard bonnet, keyboard circuit is installed, this keyboard circuit is connected with Piezoceramic press key on the one hand, is connected and carries out communication on the other hand with host computer.
And, described keyboard circuit comprises signals collecting chip, the first photoelectrical coupler, single-chip microcomputer, the second photoelectrical coupler and power module, described power module and signals collecting chip, the first photoelectrical coupler, single-chip microcomputer, the second photoelectrical coupler is connected for its power supply, described signals collecting chip, the first photoelectrical coupler, single-chip microcomputer, the second photoelectrical coupler is connected successively, the input end of this signals collecting chip is connected with Piezoceramic press key for detection of piezoelectric ceramics signal by wire, the output terminal of this second photoelectrical coupler is connected with host computer and carries out data transmission.
And described power module is insulating power supply module.
Advantage of the present utility model and good effect are:
1, the utility model adopts the main body of Piezoceramic press key as essential safety keyboard, and by the signal isolation of front and back, and the selection of intrinsically safe power supply has realized the intrinsic safety processing of keyboard, guarantee that keyboard can be applied in the middle of the environment with damp dust, the weight of the input media of electric, the electronic equipment that meanwhile, makes to use in the middle of the environment of damp, dust alleviates greatly.
2, the Piezoceramic press key that the utility model adopts belongs to contactless inductive keyboard, and greatly improved and external electromagnetic-radiation-free the serviceable life of keyboard.
3, the utility model adopts Piezoceramic press key, keyboard itself is had corrosion-resistant, resistance to wears, free of contamination advantage.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is keyboard circuit block scheme of the present utility model;
Fig. 3 is the piezoelectric effect schematic diagram of piezoelectric ceramics.
Embodiment
Below in conjunction with accompanying drawing, the utility model embodiment is further described.
A kind of for the piezoelectric ceramic type essential safe type keyboard under coal mine; as shown in Figure 1; comprise keyboard bonnet 1, pressing plate 2, Piezoceramic press key 3, backplate 4 and plastics mantle 5; described pressing plate is packed on keyboard bonnet; described Piezoceramic press key is arranged on pressing plate; described backplate is arranged on Piezoceramic press key; described plastics mantle covers on backplate; wherein keyboard bonnet, pressing plate and backplate play support protective effect to Piezoceramic press key, and flexible plastic film can play the effect of waterproof and dustproof.In keyboard bonnet, keyboard circuit is installed, this keyboard circuit is connected with Piezoceramic press key on the one hand, is connected and carries out communication on the other hand with host computer.
As shown in Figure 2, keyboard circuit comprises signals collecting chip, the first photoelectrical coupler, single-chip microcomputer, the second photoelectrical coupler and insulating power supply module, insulating power supply module and signals collecting chip, the first photoelectrical coupler, single-chip microcomputer, the second photoelectrical coupler is connected for its power supply, signals collecting chip, the first photoelectrical coupler, single-chip microcomputer, the second photoelectrical coupler is connected successively, the input end of signals collecting chip is connected with Piezoceramic press key for detection of piezoelectric ceramics signal by wire, signals collecting chip can be by Piezoceramic press key because the electric signal that piezoelectric effect produces is transferred in single-chip microcomputer by the first photoelectrical coupler, single-chip microcomputer is by judging that electrical signal levels saltus step judges key position, and output on the second photoelectrical coupler, the output terminal of the second photoelectrical coupler is connected with host computer and carries out data transmission.
Piezoceramic press key can be converted into electric energy by mechanical energy, and in the time applying ambient pressure, piezoelectric ceramics two ends there will be electric discharge phenomena, as shown in Figure 3.The utility model is realized according to above-mentioned principle.
The course of work of the present utility model is:
(1) signals collecting chip gathers, amplifies by the electric signal that Piezoceramic press key is produced the input end that exports the first photoelectrical coupler to;
(2) first photoelectrical couplers by this signal isolate, intrinsic safety process export by the output terminal of the first photoelectrical coupler judgement, the coding that single-chip microcomputer carries out signal to, then exported to the input end of the second photoelectrical coupler by the delivery outlet of single-chip microcomputer;
(3) second photoelectrical couplers will be isolated by the outupt coded signal of single-chip microcomputer, then export host computer by the output terminal of the second photoelectrical coupler to by bus mode.
(4) host computer is decoded this signal and logic judgement, is used for judging current operational order, thereby has realized the intrinsic safety processing capacity to keyboard.
It is emphasized that; embodiment described in the utility model is illustrative; rather than determinate; therefore the utility model comprises and is not limited to the embodiment described in embodiment; every other embodiments that drawn according to the technical solution of the utility model by those skilled in the art, belong to the scope that the utility model is protected equally.
Claims (3)
1. one kind for the piezoelectric ceramic type essential safe type keyboard under coal mine, it is characterized in that: comprise keyboard bonnet, pressing plate, Piezoceramic press key, backplate and plastics mantle, described pressing plate is packed on keyboard bonnet, described Piezoceramic press key is arranged on pressing plate, described backplate is arranged on Piezoceramic press key, described plastics mantle covers on backplate, in keyboard bonnet, keyboard circuit is installed, this keyboard circuit is connected with Piezoceramic press key on the one hand, is connected and carries out communication on the other hand with host computer.
2. according to claim 1 a kind of for the piezoelectric ceramic type essential safe type keyboard under coal mine, it is characterized in that: described keyboard circuit comprises signals collecting chip, the first photoelectrical coupler, single-chip microcomputer, the second photoelectrical coupler and power module, described power module and signals collecting chip, the first photoelectrical coupler, single-chip microcomputer, the second photoelectrical coupler is connected for its power supply, described signals collecting chip, the first photoelectrical coupler, single-chip microcomputer, the second photoelectrical coupler is connected successively, the input end of this signals collecting chip is connected with Piezoceramic press key for detection of piezoelectric ceramics signal by wire, the output terminal of this second photoelectrical coupler is connected with host computer and carries out data transmission.
3. according to claim 2 a kind of for the piezoelectric ceramic type essential safe type keyboard under coal mine, it is characterized in that: described power module is insulating power supply module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420016307.6U CN203689450U (en) | 2014-01-10 | 2014-01-10 | Piezoelectric ceramic type intrinsically safe keyboard for underground coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420016307.6U CN203689450U (en) | 2014-01-10 | 2014-01-10 | Piezoelectric ceramic type intrinsically safe keyboard for underground coal mine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203689450U true CN203689450U (en) | 2014-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420016307.6U Expired - Fee Related CN203689450U (en) | 2014-01-10 | 2014-01-10 | Piezoelectric ceramic type intrinsically safe keyboard for underground coal mine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203689450U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107272915A (en) * | 2017-06-20 | 2017-10-20 | 煤科集团沈阳研究院有限公司 | A kind of intelligent intrinsic safety communication keypad device |
-
2014
- 2014-01-10 CN CN201420016307.6U patent/CN203689450U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107272915A (en) * | 2017-06-20 | 2017-10-20 | 煤科集团沈阳研究院有限公司 | A kind of intelligent intrinsic safety communication keypad device |
| CN107272915B (en) * | 2017-06-20 | 2024-04-26 | 煤科集团沈阳研究院有限公司 | Intelligent intrinsic safety communication keyboard device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140702 Termination date: 20170110 |