CN104991102A - Weak current test automatic switching device - Google Patents
Weak current test automatic switching device Download PDFInfo
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- CN104991102A CN104991102A CN201510369690.2A CN201510369690A CN104991102A CN 104991102 A CN104991102 A CN 104991102A CN 201510369690 A CN201510369690 A CN 201510369690A CN 104991102 A CN104991102 A CN 104991102A
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Abstract
The invention provides a weak current test automatic switching device, comprising a diode U1, a working ammeter mA and a standby ammeter [mu]A. The diode U1 and the standby ammeter [mu]A are connected in parallel. The diode U1 and the working ammeter mA are connected in series. The working ammeter mA and the standby ammeter [mu]A are connected in series. The beneficial effects are that a change-over switch is omitted; the voltage conduction characteristics of the diode U1 are utilized to automatically switch the working ammeter mA and the standby ammeter [mu]A; operation current and standby current of a product can be observed timely, and the labor cost is saved; the diode U1 is adopted, the working ammeter mA is parallelly protected, and over deflection of a pointer and burnout are prevented when a switching mode is changed and heavy current passes through.
Description
Technical field
The present invention relates to proving installation, particularly relate to a kind of weak current test automatic transfer equipment.
Background technology
When telepilot maybe needs to use battery-powered products test job and standby (static state) electric current, after product is converted to holding state by duty, manual switch operating electric current (mA) table and standby current (μ A) show switch, observe correlation.Manual switching ammeter switch, action is wasted; After product is converted to holding state by duty, manual observation working current table return just can judge, man-hour is reacted in waste.
Summary of the invention
In order to solve the problems of the prior art, the invention provides the weak current test automatic transfer equipment that a kind of testing efficiency is higher.
The invention provides a kind of weak current test automatic transfer equipment, comprise diode U1, working current table mA and standby current table μ A, described diode U1, standby current table μ A are in parallel, described diode U1, working current table mA are in series, and described standby current table μ A, working current table mA are in series.
As a further improvement on the present invention, described weak current test automatic transfer equipment also comprises power supply, the input end of described diode U1, standby current table μ A is connected with the positive pole of described power supply, the negative pole of described power supply is connected with negative pole test port, and the output terminal of described working current table mA is connected with positive pole test port.
As a further improvement on the present invention, described weak current test automatic transfer equipment also comprises test products, and the positive pole of described test products is connected with described positive pole test port, and the negative pole of described test products is connected with described negative pole test port.
As a further improvement on the present invention, described test products is telepilot.
As a further improvement on the present invention, described power supply is battery.
As a further improvement on the present invention, the conduction voltage drop of described diode U1 is 0.3V.
The invention has the beneficial effects as follows: by such scheme, cancel switch, utilize diode U1 voltage turn-on characteristic, automatic pong current table mA and standby current table μ A, the very first time can be observed product work and standby current, has saved cost of labor; Utilize diode U1, protection working current table mA in parallel, if avoid change-over switch mode to have big current to pass through to cause, needle deflection is excessive to be burnt out.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of a kind of weak current test of the present invention automatic transfer equipment.
Embodiment
Illustrate below in conjunction with accompanying drawing and embodiment the present invention is further described.
As shown in Figure 1, a kind of weak current test automatic transfer equipment, comprise diode U1, working current table mA and standby current table μ A, described diode U1, standby current table μ A are in parallel, described diode U1, working current table mA are in series, and described standby current table μ A, working current table mA are in series.
As shown in Figure 1, working current table mA is milliammeter, and standby current table μ A is microampere meter.
As shown in Figure 1, described weak current test automatic transfer equipment also comprises power supply, the input end of described diode U1, standby current table μ A is connected with the positive pole of described power supply, the negative pole of described power supply is connected with negative pole test port, and the output terminal of described working current table mA is connected with positive pole test port.
As shown in Figure 1, described weak current test automatic transfer equipment also comprises test products, and the positive pole of described test products is connected with described positive pole test port, and the negative pole of described test products is connected with described negative pole test port.
As shown in Figure 1, described test products is telepilot.
As shown in Figure 1, described power supply is battery.
As shown in Figure 1, the conduction voltage drop of described diode U1 is 0.3V.
A kind of weak current test automatic transfer equipment provided by the invention, is, for the purpose of semiautomatic working, utilize diode voltage on state characteristic by manual work, proposes a kind of switching current table scheme automatically, designs a simple and easy weak current test automatic transfer equipment.This device is by connecting standby current table μ A input end by positive electrode of power, again by 1 diode U1(germanium tube) be parallel to standby current table μ A, connect a working current table mA again, power end can use battery or Power supply, working current table mA output terminal and power supply-pole are connected to test products both positive and negative polarity, can conversion testing product work electric current and standby current.
As shown in Figure 1, during use, first device is accessed power supply (pond) end, then its working current table mA output terminal and power supply-pole are connected to product both positive and negative polarity to be tested, now, because product has Power supply work, larger current I1 > 1mA(mA shows minimum scale) electric current by standby current table μ A in parallel with diode U1 time, U1=I1 × 3K > 0.3V, diode U1 forward conduction, now resistance value is close to 0 Ω, electric current directly by after diode again by working current table mA, just observable working current table mA value record, a period of time after product is without any operational motion, be automatically converted to holding state, now small electric stream I2 < 50 μ A is by standby current table μ A in parallel with diode U1, U2=I2 × 3K < 0.3V, diode U1 ends, electric current is shown by standby current table μ A, just (now working current table mA shows close to 0 observable record, internal resistance is less, current sinking value can be ignored).
A kind of weak current test automatic transfer equipment provided by the invention, can be used for telepilot when maybe needing to use battery-powered products test job and standby (static state) electric current.
A kind of weak current test automatic transfer equipment provided by the invention has the following advantages:
1, switch is cancelled, owing to utilizing diode U1 voltage turn-on characteristic, automatic conversion standby current table μ A and working current table mA, the very first time can be observed product work and standby current, utilize the on state characteristic coordinating test products can be automatically converted to holding state and diode U1 after nothing operation a period of time, achieve the automatic conversion that standby current table μ A tests and working current table mA tests, save cost of labor.
2, utilize diode U1 conduction voltage drop 0.3V, protection standby current table μ A in parallel, if avoid change-over switch mode to have big current to pass through to cause, needle deflection is excessive to be burnt out.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (6)
1. a weak current test automatic transfer equipment, it is characterized in that: comprise diode U1, working current table mA and standby current table μ A, described diode U1, standby current table μ A are in parallel, described diode U1, working current table mA are in series, and described standby current table μ A, working current table mA are in series.
2. weak current test automatic transfer equipment according to claim 1, it is characterized in that: described weak current test automatic transfer equipment also comprises power supply, the input end of described diode U1, standby current table μ A is connected with the positive pole of described power supply, the negative pole of described power supply is connected with negative pole test port, and the output terminal of described working current table mA is connected with positive pole test port.
3. weak current test automatic transfer equipment according to claim 2, it is characterized in that: described weak current test automatic transfer equipment also comprises test products, the positive pole of described test products is connected with described positive pole test port, and the negative pole of described test products is connected with described negative pole test port.
4. weak current test automatic transfer equipment according to claim 3, is characterized in that: described test products is telepilot.
5. weak current test automatic transfer equipment according to claim 2, is characterized in that: described power supply is battery.
6. weak current test automatic transfer equipment according to claim 1, is characterized in that: the conduction voltage drop of described diode U1 is 0.3V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510369690.2A CN104991102A (en) | 2015-06-29 | 2015-06-29 | Weak current test automatic switching device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510369690.2A CN104991102A (en) | 2015-06-29 | 2015-06-29 | Weak current test automatic switching device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104991102A true CN104991102A (en) | 2015-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510369690.2A Pending CN104991102A (en) | 2015-06-29 | 2015-06-29 | Weak current test automatic switching device |
Country Status (1)
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| CN (1) | CN104991102A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068721A (en) * | 2018-01-24 | 2019-07-30 | 中科院微电子研究所昆山分所 | A kind of test device of electric lockset electric current |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4369341A (en) * | 1981-05-11 | 1983-01-18 | Tii Industries, Inc. | Customer line test termination device |
| CN101399864A (en) * | 2007-09-29 | 2009-04-01 | 中兴通讯股份有限公司 | Test system and method for standby current of mobile terminal |
| CN201994652U (en) * | 2011-04-13 | 2011-09-28 | 王鹏 | Open-circuit protector of current transformer |
| CN202256515U (en) * | 2011-08-09 | 2012-05-30 | 武汉海创电子股份有限公司 | Constant current power load table for negative temperature coefficient (NTC) thermistor |
| CN202794292U (en) * | 2012-06-27 | 2013-03-13 | 惠州市德赛西威汽车电子有限公司 | Device for testing standby current |
| CN203616370U (en) * | 2013-12-24 | 2014-05-28 | 惠州市德赛西威汽车电子有限公司 | Gear shift jack automatic selection device of ammeter |
| CN204832305U (en) * | 2015-06-29 | 2015-12-02 | 深圳市创荣发电子有限公司 | Weak current test automatic switching device |
-
2015
- 2015-06-29 CN CN201510369690.2A patent/CN104991102A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4369341A (en) * | 1981-05-11 | 1983-01-18 | Tii Industries, Inc. | Customer line test termination device |
| CN101399864A (en) * | 2007-09-29 | 2009-04-01 | 中兴通讯股份有限公司 | Test system and method for standby current of mobile terminal |
| CN201994652U (en) * | 2011-04-13 | 2011-09-28 | 王鹏 | Open-circuit protector of current transformer |
| CN202256515U (en) * | 2011-08-09 | 2012-05-30 | 武汉海创电子股份有限公司 | Constant current power load table for negative temperature coefficient (NTC) thermistor |
| CN202794292U (en) * | 2012-06-27 | 2013-03-13 | 惠州市德赛西威汽车电子有限公司 | Device for testing standby current |
| CN203616370U (en) * | 2013-12-24 | 2014-05-28 | 惠州市德赛西威汽车电子有限公司 | Gear shift jack automatic selection device of ammeter |
| CN204832305U (en) * | 2015-06-29 | 2015-12-02 | 深圳市创荣发电子有限公司 | Weak current test automatic switching device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110068721A (en) * | 2018-01-24 | 2019-07-30 | 中科院微电子研究所昆山分所 | A kind of test device of electric lockset electric current |
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Application publication date: 20151021 |