CN205374647U - System for detection pen -shape metre inserts - Google Patents
System for detection pen -shape metre inserts Download PDFInfo
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- CN205374647U CN205374647U CN201521047019.8U CN201521047019U CN205374647U CN 205374647 U CN205374647 U CN 205374647U CN 201521047019 U CN201521047019 U CN 201521047019U CN 205374647 U CN205374647 U CN 205374647U
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- test pencil
- sheet metal
- operational amplifier
- inserts
- detection
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Abstract
The utility model discloses a system for detection pen -shape metre inserts, it includes: pen -shape metre seat, operational amplifier and detecting element, wherein, the pen -shape metre seat is two discrete sheetmetals, is first sheetmetal and second sheetmetal respectively, first sheetmetal is connected to the power, and is connected to operational amplifier's first input end, the second sheetmetal is connected to ground, and is connected to operational amplifier's second input, operational amplifier's output is connected to detecting element. The utility model discloses a system for detection pen -shape metre inserts can correctly, reliably not insert the broken string problem that produces because of the pen -shape metre in quick location, improves the efficiency of field usage, wiring investigation, and detects the rate of accuracy height.
Description
Technical field
This utility model relates to test pencil and inserts detection field, detects, particularly to a kind of, the system that test pencil inserts.
Background technology
The instrument and equipment being operated need to be coordinated by test pencil, as: circuit tester, tester etc., after insertion only correct at test pencil, reliable, could normal operation.But in actual use, can cause that test pencil insertion correct, reliable is broken because of many reasons, cause instrument and equipment cisco unity malfunction.Possible reason has: test pencil is not fully inserted into test pencil seat；Metal contact surface surface oxidation produces insulating barrier；Metal contact surface is corroded；Foreign body etc. is fallen in test pencil seat.And when the problem of investigation, even relate to link because of signal more, to quickly navigate to problem points, it is not so easy.
The method that whether detection test pencil is correctly inserted at present mainly has following two:
(1) change-detection of front and back is inserted at test pencil by optical signal: the program arranges a luminous source at test pencil seat interior side, and another time arranges optical receiving end, and when test pencil is not inserted into, receiving terminal can receive optical signal；When test pencil inserts, optical signal is blocked by test pencil, and receiving terminal cannot receive optical signal.The defect of the program is to judge the disconnection problem that metal contact surface produces because of oxidation, corrosion, as long as namely optical signal is blocked and all can think that contact is good, there is the possibility of certain misoperation.
(2) USB interface, earphone interface, the signal level variation detection of the terminal interface insertion front and back such as charger mouth: the program, by judging the segment signal line level change in terminal interface, detects whether to be correctly inserted into.The program need to detect the holding wire level of terminal interface, and distinct interface is equipped with different pull-up, pull down resistor, inserts detection by the realization of level upset or change before and after inserting.The program needs the cooperation of internal signal wire, if holding wire is abnormal, detection exists the possibility that cannot perform.
All there is certain defect in above two method, therefore, is badly in need of providing a kind of and detects the method that test pencil inserts efficiently, accurately.
Utility model content
This utility model is for above-mentioned problems of the prior art, a kind of system detecting test pencil insertion is proposed, can quickly be positioned the disconnection problem produced because of test pencil insertion correct, reliable by native system, improve the efficiency of onsite application, wiring investigation, and Detection accuracy is high.
For solving above-mentioned technical problem, this utility model is achieved by the following technical solution:
This utility model provides a kind of and detects the system that test pencil inserts, comprising: test pencil seat, operational amplifier and detection unit, wherein,
Described test pencil seat is the discontinuous sheet metal of two panels, respectively the first sheet metal and the second sheet metal；
Described first sheet metal is connected to power supply, and is connected to the first input end of described operational amplifier；Described second sheet metal is connected to the ground, and is connected to the second input of described operational amplifier；
The outfan of described operational amplifier is connected to described detection unit.
It is preferred that described first input end is positive input, described second input is negative input.
It is preferred that described first sheet metal is connected to described power supply by the first resistance；Described first sheet metal is connected to described by the second resistance.
It is preferred that the resistance of described first resistance and described second resistance is more than 1M Ω, it is possible to avoid the first resistance, the second Resistance Influence normally to input, export signal.
It is preferred that fastened by isolation material between described first sheet metal and described second sheet metal.
It is preferred that described first sheet metal and described second sheet metal are half-round metal sheet.
It is preferred that described test pencil seat and described operational amplifier include multiple, the corresponding described operational amplifier of each described test pencil seat, multiple described test pencil seats and described operational amplifier are connected in parallel.
Compared to prior art, this utility model has the advantage that
(1) system that the detection test pencil that this utility model provides inserts, highly versatile, can detect the plugging condition of a test pencil, it is not necessary to the cooperation of terminal signaling line, and individually can detect for each test pencil, accurate positioning；
(2) system of detection test pencil of the present utility model insertion, only detects metal contact surface, the level height change of the signal of telecommunication before and after the insertion correct, reliable of detection test pencil；Malfuncton probability is much smaller, it is judged that accuracy rate is high, can quickly position the disconnection problem produced because of test pencil insertion correct, reliable, improve the efficiency of onsite application, wiring investigation.
Certainly, implement arbitrary product of the present utility model to it is not absolutely required to reach all the above advantage simultaneously.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further:
Fig. 1 is the test pencil of embodiment 1 of the present utility model system construction drawing when being not inserted into；
Fig. 2 is the system construction drawing during test pencil insertion of embodiment 2 of the present utility model；
Fig. 3 is the system construction drawing of embodiment 2 of the present utility model.
Label declaration: 1-test pencil seat, 2-operational amplifier, 3-detects unit；
11-the first sheet metal, 12-the second sheet metal.
Detailed description of the invention
Below embodiment of the present utility model being elaborated, the present embodiment is carried out under premised on technical solutions of the utility model, gives detailed embodiment and concrete operating process, but protection domain of the present utility model is not limited to following embodiment.
Embodiment 1:
In conjunction with Fig. 1-Fig. 2, the system that detection test pencil of the present utility model is inserted is described in detail, comprising: test pencil seat 1, operational amplifier 2 and detection unit 3, test pencil seat is made up of the discontinuous sheet metal of two panels, respectively the first sheet metal 11 and the second sheet metal 12；First sheet metal 11 connects power supply by the first resistance R1, by being connected to the positive input of operational amplifier 2 after the first resistance R1 pull-up, second sheet metal 12, by the second resistance R2 ground connection, is connected to the negative input of operational amplifier 2 by the second resistance R2 after drop-down；The outfan of operational amplifier 2 is connected to detection unit 3, and detection unit is for the output level of detection calculations amplifier 2, and then judges whether test pencil inserts.
First sheet metal 11 and the second sheet metal pull up respectively, drop-down be followed by operational amplifier 2；Two panels sheet metal is fastened by isolation material.
As shown in Figure 1, when test pencil is not inserted into test pencil seat 1, two panels sheet metal is not turned on, because respectively connecing a resistance, R1 is pulled to power supply, and R2 is pulled down to ground, and is connected to two inputs of operational amplifier 2, now the positive input voltage of operational amplifier 2 is more than negative input voltage, and therefore the outfan of operational amplifier exports a high level to detection unit 3.
As shown in Figure 2, when the fully-inserted test pencil seat of test pencil, originally the first sheet metal 11 being not turned on test pencil seat can be connected by the metallic plug of test pencil with the second sheet metal 12, now two input terminal voltages of operational amplifier 2 are equal, and therefore the outfan of operational amplifier 2 can export a low level to detection unit.
It is different that the present embodiment exports the low and high level to detection unit 3 according to operational amplifier 2, it is achieved that the detection whether test pencil reliably inserts.
In preferred embodiment, for avoiding the normal input of pull-up resistor R1, pull down resistor R2 impact, output signal, its resistance can not be too little, is generally higher than 1M Ω.
In the present embodiment, the first sheet metal 11 and the second sheet metal 12 are symmetrical half-round metal sheet.In different embodiments, two panels sheet metal can also be asymmetric structure；Circle can also be formed in a further embodiment, it is possible to carry out different designs according to the difformity of test pencil seat.
The existing change-detection by optical signal before and after test pencil inserts, arranges a luminous source at test pencil seat interior side, and the other end arranges receiving terminal, and when test pencil is not inserted into, receiving terminal can receive optical signal；When test pencil inserts, optical signal is blocked by test pencil, and receiving terminal can receive optical signal, and the method cannot judge the disconnection problem that metal contact surface produces because of oxidation, corrosion；And the system that the detection test pencil of the present embodiment inserts, only metal contact surface being detected and namely can determine whether whether to break, malfuncton probability is smaller.Existing by the terminal interface such as USB interface, earphone interface insert before and after signal level variation detection, it is necessary to the holding wire level of detection terminal interface, distinct interface need to be equipped with different pull-up, pull down resistor, poor universality；And the system of the present embodiment has good versatility, the plugging condition of each test pencil can be detected, it is not necessary to the cooperation of terminal signaling line, and individually detect for each test pencil, accurate positioning.
Embodiment 2:
The present embodiment is the system that multiple test pencils are detected, and it includes multiple test pencil seat 1 being connected in parallel, the corresponding operational amplifier 2 of each test pencil seat 1, and the output level of multiple operational amplifiers 2 exports in a detection unit 3.
The system of the present embodiment detects while can apply to multiple test pencil, and can respectively each test pencil individually be detected, the plug signal of each test pencil is exported to detecting unit, detection unit can insert signal by the test pencil of the required test pencil position inserted of current demand signal and actual measurement and compare, the insert state of the prompting current each test pencil of user, the information such as correctness.
Disclosed herein is only preferred embodiment of the present utility model, and these embodiments are chosen and specifically described to this specification, is to explain principle of the present utility model and practical application better, is not to restriction of the present utility model.The modifications and variations that any those skilled in the art do within the scope of description, all should drop in the scope that this utility model is protected.
Claims (7)
1. one kind is detected the system that test pencil inserts, it is characterised in that including: test pencil seat, operational amplifier and detection unit, wherein,
Described test pencil seat is the discontinuous sheet metal of two panels, respectively the first sheet metal and the second sheet metal；
Described first sheet metal is connected to power supply, and is connected to the first input end of described operational amplifier；Described second sheet metal is connected to the ground, and is connected to the second input of described operational amplifier；
The outfan of described operational amplifier is connected to described detection unit.
2. the system that detection test pencil according to claim 1 inserts, it is characterised in that described first input end is positive input, and described second input is negative input.
3. the system that detection test pencil according to claim 1 inserts, it is characterised in that described first sheet metal is connected to described power supply by the first resistance；Described first sheet metal is connected to described by the second resistance.
4. the system that detection test pencil according to claim 3 inserts, it is characterised in that the resistance of described first resistance and described second resistance is more than 1M Ω.
5. the system that detection test pencil according to claim 1 inserts, it is characterised in that fastened by isolation material between described first sheet metal and described second sheet metal.
6. the system that detection test pencil according to claim 1 inserts, it is characterised in that described first sheet metal and described second sheet metal are half-round metal sheet.
7. the system that the detection test pencil according to any one of claim 1 to 6 inserts, it is characterized in that, described test pencil seat and described operational amplifier include multiple, and the corresponding described operational amplifier of each described test pencil seat, multiple described test pencil seats and described operational amplifier are connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521047019.8U CN205374647U (en) | 2015-12-16 | 2015-12-16 | System for detection pen -shape metre inserts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521047019.8U CN205374647U (en) | 2015-12-16 | 2015-12-16 | System for detection pen -shape metre inserts |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205374647U true CN205374647U (en) | 2016-07-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521047019.8U Active CN205374647U (en) | 2015-12-16 | 2015-12-16 | System for detection pen -shape metre inserts |
Country Status (1)
| Country | Link |
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| CN (1) | CN205374647U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108107242A (en) * | 2017-12-28 | 2018-06-01 | 优利德科技(中国)有限公司 | A kind of test pencil warning device |
| WO2022252125A1 (en) * | 2021-06-01 | 2022-12-08 | 深圳市华盛昌科技实业股份有限公司 | Input socket module for pen probe and multimeter |
-
2015
- 2015-12-16 CN CN201521047019.8U patent/CN205374647U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108107242A (en) * | 2017-12-28 | 2018-06-01 | 优利德科技(中国)有限公司 | A kind of test pencil warning device |
| WO2022252125A1 (en) * | 2021-06-01 | 2022-12-08 | 深圳市华盛昌科技实业股份有限公司 | Input socket module for pen probe and multimeter |
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| GR01 | Patent grant |