CN2307407Y - Push-button keyboard detector - Google Patents
Push-button keyboard detector Download PDFInfo
- Publication number
- CN2307407Y CN2307407Y CN97219050U CN97219050U CN2307407Y CN 2307407 Y CN2307407 Y CN 2307407Y CN 97219050 U CN97219050 U CN 97219050U CN 97219050 U CN97219050 U CN 97219050U CN 2307407 Y CN2307407 Y CN 2307407Y
- Authority
- CN
- China
- Prior art keywords
- keyboard
- led
- detector
- power supply
- parallel
- 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
Links
- 238000012360 testing method Methods 0.000 claims description 12
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000004904 shortening Methods 0.000 abstract 1
- 230000006641 stabilisation Effects 0.000 abstract 1
- 238000011105 stabilization Methods 0.000 abstract 1
- 238000001514 detection method Methods 0.000 description 2
- 230000011218 segmentation Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
Landscapes
- Input From Keyboards Or The Like (AREA)
Abstract
The utility model discloses a detector for an end office keyboard of wired talk-back equipment. The detector for an end office keyboard of wired talk-back equipment comprises a power supply, the positive end of which is connected with a socket connector matched with a keyboard via the keyboard. A keyboard indicating lamp is connected with a battery E via a switch K2. One circuit in a linking switch of a detected keyboard is connected with light emitting diodes correspondingly one by one via socket connectors, and the other circuit is connected with the negative end of the power supply via the light emitting diodes after connected in parallel. The battery E and the light emitting diodes are connected in parallel. Large numbers of press key type keyboards can be quickly and accurately detected by the detector. The detector for an end office keyboard of wired talk-back equipment has the advantages of simple circuits, stabilization, reliability, capability of increasing maintenance efficiency, reduction of erroneous judgments and shortening of maintenance time.
Description
The utility model relates to a kind of button keyboard detector, is specially adapted to end office's keyboard detection of wired intercom equipment.
The inner general wired intercom communication equipment that uses carries out two-way call in industrial and mining enterprises, during use, when the people calls out, callee's indicator light is bright, loud speaker is received instruction, and receiving terminal is pressed the telecommunication circuit work that makes with corresponding button, and receiving circuit turn-offs, the recipient can send signal, reaches the purpose that both sides transmit sound mutually.The installed capacity of this kind equipment generally has more than hundreds of doors, and the keyboard tester that does not generally have end office (EO) when end office (EO) breaks down, can only be used conventional repair method, carry out segmentation relatively, progressively judge and search processing, and repeatability fault ratio height, after simultaneously this end office (EO) being repaired, must carry out on-line testing to the keyboard after repairing at the scene, workload is very big, and in the prior art, the instrumentation that this type of keyboard detection is used yet there are no report.
The purpose of this utility model is to obtain a kind of wired intercom equipment end office (EO) keyboard detector, can check out the button that damage is malfunctioning quickly and accurately, and simple in structure.
The technical solution of the utility model is achieved in that
A kind of button keyboard detector, it comprises: power positive end joins keyboard indicator light Lp through the connector that keyboard and keyboard match
1～Lp
nThrough K switch
2E joins with battery, road J in the coupled switch of tested keyboard
K1A～J
KnAThrough connector correspondingly with LED
1～LED
nJoin another road J
K1B～J
KnBParallel connection is after LED
N+2Join with power supply negative terminal.
LED
1～LED
nConnect with anti-reverse diode.
LED
1～LED
nBack in parallel and Test Switchboard K
2Join.
Power supply E and LED
N+1In parallel.
Power supply E and mains switch K
1Join.
Power supply E is in parallel with filter capacitor C.
Below in conjunction with accompanying drawing the utility model is further described.
Accompanying drawing is the circuit theory diagrams of the utility model press key type keyboard test device.
Referring to accompanying drawing, the operation principle of end office's keyboard is: the signal that comes from the i road makes keyboard indicator light L
PiShinny, receiving terminal pushes button coupled switch J
KiPush (b), L by (a)
PiExtinguish, send the words end to turn-off, the signal that receiving terminal sends is through resistance R
N+2, LED
N+2Send.The utility model needs keyboard indicator light L
P1～L
PnWith coupled switch J
K1～J
Kn(being part in the frame of broken lines) tests, and is through connector and display circuit LED with keyboard
1～LED
nWith current-limiting resistance R
1～R
nLink to each other, display circuit is through anti-reverse diode D
1～D
nBack in parallel and Test Switchboard K
2Join.During test, with mains switch K
1Closure, source current is through current-limiting resistance R
N+1, make LED
N+1Conducting, LED
N+1Be for whether test battery group E is sufficient, if LED
N+1Dim light illustrates the battery that needs to change tester, and battery pack E is in parallel with capacitor C, and capacitor C plays the filtering voltage regulation effect, and the variation of load causes the fluctuation of the voltage at battery E two ends when reducing test.With the Test Switchboard closure, can detect keyboard indicator light L then
P1～L
PnQuality.Then keyboard is pressed, be about to switch and push (b) end, test coupled switch J by (a) end
K1～J
KnQuality, if LED i and LED in the corresponding display circuit
N+2Bright, the button that then proves the i road is good, otherwise illustrates that promptly this road button has problem, needs to repair to change.
The detector that the utility model obtains can detect the two-way of indicator light in the keyboard and coupled switch, can detect a large amount of end office (EO)s keyboard rapidly accurately, has remedied the segmentation deficiency of system testing maintenance; The LED of this detector high-performance, high brightness is as the demonstration of abort situation, and circuit is simple, and is reliable and stable, easy to carry, can improve maintenance efficiency, reduces erroneous judgement, shortens the repair time.
Claims (6)
1. button keyboard detector is characterized in that: power positive end joins keyboard indicator light Lp through the connector that keyboard and and keyboard match
1～Lp
nThrough K switch
2E joins with battery, road J in the coupled switch of tested keyboard
K1A～J
KnAThrough connector correspondingly with LED
1～LED
nJoin another road J
K1B～J
KnBParallel connection is after LED
N+2Join with power supply negative terminal.
2. detector according to claim 1 is characterized in that: described LED
1～LED
nConnect with anti-reverse diode.
3. detector according to claim 1 is characterized in that: described LED
1～LED
nBack in parallel and Test Switchboard K
2Join.
4. detector according to claim 1 is characterized in that: described power supply E and LED
N+1In parallel.
5. detector according to claim 1 is characterized in that: described power supply E and mains switch K
1Join.
6. detector according to claim 1 is characterized in that: described power supply E is in parallel with filter capacitor C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97219050U CN2307407Y (en) | 1997-06-26 | 1997-06-26 | Push-button keyboard detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97219050U CN2307407Y (en) | 1997-06-26 | 1997-06-26 | Push-button keyboard detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2307407Y true CN2307407Y (en) | 1999-02-10 |
Family
ID=33935189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97219050U Expired - Fee Related CN2307407Y (en) | 1997-06-26 | 1997-06-26 | Push-button keyboard detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2307407Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253297A (en) * | 2011-06-23 | 2011-11-23 | 奇瑞汽车股份有限公司 | Detector for manual control box of chassis combined loading trolley |
| CN110865258A (en) * | 2019-11-28 | 2020-03-06 | 西安中颖电子有限公司 | Key detection circuit and key detection method for segmented comparison by using multiple thresholds |
-
1997
- 1997-06-26 CN CN97219050U patent/CN2307407Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102253297A (en) * | 2011-06-23 | 2011-11-23 | 奇瑞汽车股份有限公司 | Detector for manual control box of chassis combined loading trolley |
| CN110865258A (en) * | 2019-11-28 | 2020-03-06 | 西安中颖电子有限公司 | Key detection circuit and key detection method for segmented comparison by using multiple thresholds |
| CN110865258B (en) * | 2019-11-28 | 2022-02-22 | 西安中颖电子有限公司 | Key detection circuit and key detection method for segmented comparison by using multiple thresholds |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN200979592Y (en) | An inspection apparatus for single-phase load of electric meter | |
| CN202256621U (en) | Relay tester | |
| CN2307407Y (en) | Push-button keyboard detector | |
| CN201096858Y (en) | A wiring harness detection table | |
| CN207488412U (en) | A kind of Beam Detector | |
| CN101699305A (en) | Automatic circuit fault diagnosis and alarm device | |
| CN110687482B (en) | Visual secondary circuit comprehensive detector | |
| CN205017100U (en) | Switch condition monitoring device in transformer substation's cabinet | |
| CN111124857B (en) | Fault rating notification system | |
| CN202600032U (en) | All-loop electroscope | |
| CN109507614B (en) | Testing device for emergency lighting lamp | |
| CN209102856U (en) | Test device | |
| CN209746781U (en) | Test fixture suitable for looped netowrk cabinet protection device | |
| CN212845787U (en) | Automatic module testing device | |
| CN216699998U (en) | LED signal lamp light-emitting lamp panel LED fault detection device that opens circuit | |
| CN2415367Y (en) | Line diagnosis, inspection and connecting tester | |
| CN213302480U (en) | Power supply maintenance protection circuit | |
| CN219590491U (en) | Multi-lead connector testing tool | |
| CN201477181U (en) | Short circuit testing device | |
| CN2388604Y (en) | Switchhouse power fault radio paging alarm device | |
| CN218067434U (en) | New forms of energy battery utmost point ear check out test set | |
| CN218727827U (en) | Quick detection device of high tension switchgear handcart trouble | |
| CN219997264U (en) | Street lamp fault checking and repairing box | |
| CN2279614Y (en) | LED line testing device independently operated by single person | |
| CN217717948U (en) | High-power rectifier bridge arm signal detection box |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: BAOSHAN IRON & STEEL CO., LTD. Free format text: FORMER NAME OR ADDRESS: SHANGHAI BAOSHAN STEEL( GROUP ) CO.,LTD. |
|
| CP03 | Change of name, title or address |
Address after: 201900, Fujin Road, Shanghai, Baoshan District orchard Patentee after: Baoshan Iron & Steel Co., Ltd. Address before: No. 1, Middle Road, Baoshan District, Shanghai Patentee before: Shanghai Baosteel (Group) Company |
|
| 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 |