CN101937039B - Connecting detection method - Google Patents
Connecting detection method Download PDFInfo
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- CN101937039B CN101937039B CN201010186735.XA CN201010186735A CN101937039B CN 101937039 B CN101937039 B CN 101937039B CN 201010186735 A CN201010186735 A CN 201010186735A CN 101937039 B CN101937039 B CN 101937039B
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- electrically connected
- main equipment
- signal wire
- signal line
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Abstract
The invention provides a connecting detection method, comprising the following steps of: arranging a signal line in a main apparatus, arranging a pull-down resistor in a sub-apparatus, and connecting the pull-down resistor with the signal line when the sub-apparatus is electrically connected to the main apparatus; and outputting a high level to the signal line by the main apparatus and detecting the current of the signal line, determining the electrical connection of the signal line and the sub-apparatus if the current is detected, and determining the electrical disconnection of the signal line and the sub-apparatus if the current is not detected. By adopting the method, physical resources can be saved and stronger practicability is obtained.
Description
Technical field
The present invention relates to application of electronic technology field, particularly the connection detection method of a kind of main equipment and subset.
Background technology
At present, when two electronic equipments are electrically connected, main equipment one side detects (namely detecting subset whether to be electrically connected with main equipment) mode for the connection of subset one side and is generally:
1) junction on the master arranges mechanical contact, when subset and main equipment are electrically connected, can cause the closed of mechanical contact, and whether main equipment closes determines whether subset is electrically connected with self by detecting mechanical contact;
2) main equipment is electrically connected with subset by many signal wires, after subset and main equipment are electrically connected, can cause on signal wire and occur voltage difference, by detecting this voltage difference, main equipment can determine whether subset is electrically connected with it.
Wherein, 1st) kind mode is mainly used in integrated circuit (IC, Integrate Circuit) connection between card reader and IC-card detects, 2nd) connection that kind mode is mainly used in being undertaken between the main equipment that is electrically connected and subset by USB (universal serial bus) (USB, Universal Serial BUS) interface detects.
But above-mentioned two kinds of modes all also exist certain problem in actual applications, as: for the 1st) plant mode, need to arrange special mechanical contact, implement very inconvenient, practicality is not strong; For the 2nd) plant mode, need to arrange many signal wires, cause the use amount of physical resource to increase.
Summary of the invention
In view of this, fundamental purpose of the present invention is that providing a kind of connects detection method, can save physical resource, and have stronger practicality.
For achieving the above object, technical scheme of the present invention is achieved in that
A kind of connection detection method, comprising:
Arrange a signal wire in the host, arrange a pull down resistor in subset, when described subset is connected to described main equipment, described pull down resistor will be connected with described signal wire;
Described main equipment exports high level to described signal wire, and carries out current detecting to described signal wire, if electric current detected, then determines to be electrically connected with described subset, if electric current do not detected, then determines not to be electrically connected with described subset.
Preferably, when determining to be electrically connected with described subset, the method comprises further:
Described main equipment to described signal wire output digit signals, sends to described subset by voltage system; Described subset receives described digital signal by voltage detecting mode.
Visible, adopt technical scheme of the present invention, a signal wire is set in the host, whether main equipment exists electric current determine whether subset is electrically connected with self by detecting in this signal wire, and compared to prior art, scheme of the present invention is without the need to arranging mechanical contact, also without the need to arranging many signal wires, therefore can save physical resource preferably, and implement simple and convenient, there is stronger practicality.In addition, in scheme of the present invention, described signal wire also can be utilized to complete main equipment the digital signal of subset is exported, save physical resource further.
Accompanying drawing explanation
Fig. 1 is the process flow diagram that the present invention connects detection method embodiment.
Fig. 2 is schematic equivalent circuit corresponding to the method for the invention.
Fig. 3 is a physical circuit schematic diagram corresponding to the method for the invention.
Embodiment
For problems of the prior art, propose a kind of connection detection method completely newly in the present invention, can physical resource be saved, and there is stronger practicality.
For make technical scheme of the present invention clearly, understand, to develop simultaneously embodiment referring to accompanying drawing, scheme of the present invention be described in further detail.
Fig. 1 is the process flow diagram that the present invention connects detection method embodiment.Arrange a signal wire in advance in the host, arrange a pull down resistor in subset, when subset is electrically connected to main equipment, pull down resistor will be connected with signal wire.As shown in Figure 1, comprise the following steps:
Step 11: main equipment exports high level to signal wire, and current detecting is carried out to signal wire, if electric current detected, then determine to be electrically connected with subset, if electric current do not detected, then determine not to be electrically connected with subset.
In actual applications, main equipment can utilize the signal output apparatus of self to come to export high level to signal wire, and utilizes the current detection circuit of self to carry out current detecting to signal wire.After subset is electrically connected to main equipment, pull down resistor wherein can and main equipment in current detection circuit and signal output apparatus formation current return, like this, can determine whether subset is electrically connected to main equipment by whether there is electric current in signal lines.
Step 12: when determining main equipment and subset is electrically connected, main equipment to signal wire output digit signals, sends to subset by voltage system, and subset receives described digital signal by voltage detecting mode.
Existing mode 1) in, completing utilizing mechanical contact while connecting detection, also needing, special signal wire is set and comes for main equipment to subset output digit signals; Existing mode 2) in, complete utilizing many signal wires while connecting detection, main equipment also can utilize these many signal wires to subset output digit signals.
In the present embodiment, when determining main equipment and subset is electrically connected, main equipment also can further by voltage system to signal wire output digit signals, send to subset, correspondingly, subset utilizes self voltage detecting circuit, described digital signal (namely 1 or 0 is received by voltage detecting mode, represent high level and low level respectively), how to receive described digital signal by voltage detecting mode is prior art, repeats no more.That is, in the present embodiment, utilize a signal wire complete simultaneously connect detect and digital signal export two kinds of functions.
Fig. 2 is schematic equivalent circuit corresponding to the method for the invention.As shown in Figure 2, resistance R wherein plays metering function, and current detection circuit can be prevented to be burned; Signal output apparatus exports high level to signal wire, after subset is electrically connected to main equipment, pull down resistor R ', signal output apparatus and current detection circuit etc. are by formation current return, current detection circuit will detect the existence of electric current, like this, can determine that subset and main equipment are electrically connected; Afterwards, signal output apparatus is by voltage system to signal wire output digit signals, and correspondingly, the voltage detecting circuit in subset completes the reception to digital signal.
Fig. 3 is a physical circuit schematic diagram corresponding to the method for the invention.As shown in Figure 3, suppose that main equipment and subset are electrically connected by USB interface, how to be undertaken electrically connecting as prior art by USB interface, repeat no more.
For main equipment side, resistance R1 is mainly comprised in current detection circuit wherein, resistance R4, triode Q1 and not gate U3A etc., after main equipment and subset are electrically connected, resistance R1 will produce pressure drop, thus cause triode Q1 conducting, and then the one end making resistance R4 be connected with triode Q1 produces high level, correspondingly, not gate U3A is by output low level, otherwise, if main equipment and subset are electrically connected, one end that then resistance R4 is connected with triode Q1 will be low level, correspondingly, not gate U3A will export high level, by detecting the output of not gate U3A, can determine whether subset is electrically connected to main equipment, mainly comprise in signal output apparatus: triode Q2, resistance R5 and resistance R6 etc., for carrying out the process such as power amplification to the digital signal exported.For subset side, resistance R16 is wherein pull down resistor, and electric capacity C4 mainly plays the effect of filtering clutter, and resistance R18 mainly plays a protective role with the resistance R17 etc. being arranged in voltage detecting circuit.Other and scheme of the present invention are introduced no longer one by one without the part of direct relation.
In a word, adopt technical scheme of the present invention, can physical resource be saved, and there is stronger practicality.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within the scope of protection of the invention.
Claims (2)
1. connect a detection method, it is characterized in that, the method comprises:
Arrange a signal wire in the host, arrange a pull down resistor in subset, when described subset is electrically connected to described main equipment, described pull down resistor will be connected with described signal wire;
Described main equipment exports high level to described signal wire, and carries out current detecting to described signal wire, if electric current detected, then determines to be electrically connected with described subset, if electric current do not detected, then determines not to be electrically connected with described subset.
2. method according to claim 1, is characterized in that, when determining to be electrically connected with described subset, the method comprises further:
Described main equipment to described signal wire output digit signals, sends to described subset by voltage system; Described subset receives described digital signal by voltage detecting mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010186735.XA CN101937039B (en) | 2010-05-21 | 2010-05-21 | Connecting detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010186735.XA CN101937039B (en) | 2010-05-21 | 2010-05-21 | Connecting detection method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101937039A CN101937039A (en) | 2011-01-05 |
| CN101937039B true CN101937039B (en) | 2015-01-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010186735.XA Active CN101937039B (en) | 2010-05-21 | 2010-05-21 | Connecting detection method |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102063400B (en) * | 2011-01-06 | 2013-03-13 | 天地融科技股份有限公司 | Switching device for general serial bus equipment |
| CN102721852B (en) * | 2012-06-21 | 2014-08-20 | 天地融科技股份有限公司 | Method and device for measuring working current of electronic device |
| CN102883255B (en) * | 2012-09-13 | 2014-12-03 | 天地融科技股份有限公司 | Switching device, electronic signing tool, detection device and interface detection system |
| CN108148447B (en) * | 2017-12-25 | 2019-03-19 | 泰兴锦云染料有限公司 | The compound de- ester reactive black dye of one kind, preparation method and application |
| CN111025195B (en) * | 2019-12-19 | 2021-10-19 | 山东爱德邦智能科技有限公司 | Detection circuit |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5581201A (en) * | 1994-06-30 | 1996-12-03 | Tandem Computers Incorporated | Apparatus for unit control and presence detection |
| JP2003087147A (en) * | 2001-09-17 | 2003-03-20 | Matsushita Electric Ind Co Ltd | On-vehicle device for automatic tollage transaction |
| CN1417681A (en) * | 2001-11-07 | 2003-05-14 | 旺玖科技股份有限公司 | Universal serial bus (USB) connection detecting circuit system and its operation method |
| JP2006178079A (en) * | 2004-12-21 | 2006-07-06 | Kyocera Mita Corp | Device for detecting connection of external equipment, and image forming apparatus including the same |
| JP2009302736A (en) * | 2008-06-11 | 2009-12-24 | Mitsubishi Electric Corp | Antenna connection detection circuit |
| US7928738B2 (en) * | 2008-12-30 | 2011-04-19 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Detecting system for detecting connection of connectors and connector assemblies having same |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW512232B (en) * | 2001-05-08 | 2002-12-01 | Prolific Technology Inc | USB connection-detection circuitry and operation methods of the same |
-
2010
- 2010-05-21 CN CN201010186735.XA patent/CN101937039B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5581201A (en) * | 1994-06-30 | 1996-12-03 | Tandem Computers Incorporated | Apparatus for unit control and presence detection |
| JP2003087147A (en) * | 2001-09-17 | 2003-03-20 | Matsushita Electric Ind Co Ltd | On-vehicle device for automatic tollage transaction |
| CN1417681A (en) * | 2001-11-07 | 2003-05-14 | 旺玖科技股份有限公司 | Universal serial bus (USB) connection detecting circuit system and its operation method |
| JP2006178079A (en) * | 2004-12-21 | 2006-07-06 | Kyocera Mita Corp | Device for detecting connection of external equipment, and image forming apparatus including the same |
| JP2009302736A (en) * | 2008-06-11 | 2009-12-24 | Mitsubishi Electric Corp | Antenna connection detection circuit |
| US7928738B2 (en) * | 2008-12-30 | 2011-04-19 | Hong Fu Jin Precision Industry (Shenzhen) Co., Ltd. | Detecting system for detecting connection of connectors and connector assemblies having same |
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| CN101937039A (en) | 2011-01-05 |
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Address after: 100083, room 1810, block B, golden building, No. 17, Qinghua East Road, Beijing, Haidian District Applicant after: Tendyron Technology Co., Ltd. Address before: 100083, B, block 17, golden building, No. 1810 Qinghua East Road, Beijing, Haidian District Applicant before: Beijing Tendyron Technology Co., Ltd. |
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