CN2582005Y - Safety starter for measuring impedance - Google Patents
Safety starter for measuring impedance Download PDFInfo
- Publication number
- CN2582005Y CN2582005Y CN 02255164 CN02255164U CN2582005Y CN 2582005 Y CN2582005 Y CN 2582005Y CN 02255164 CN02255164 CN 02255164 CN 02255164 U CN02255164 U CN 02255164U CN 2582005 Y CN2582005 Y CN 2582005Y
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- current
- thing
- checked
- current generator
- impedance measurement
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Abstract
The utility model relates to a safety starter for measuring impedance. The starter at least comprises a current generator used for supplying independent current and voltage to a measuring object, a current detector used for detecting the output current state of the current generator and a system control unit which can control current output values of current generator according to detecting signals provided by the current detector. The starter can carry out tests before the formal measurement of the measuring object. Minor current flow is used for determining whether the measuring object is connected with a test fixture or not. Determining states can be continuously fed back to a measuring system. When the measuring object is detected, a signal is output to driving a circuit to increase output current and voltage to rated standards, and then a test can be carried out. When testing time is over, the minor voltage and the current states can be restored. Moreover, the utility model can detect whether the measuring object is removed or not. The utility model satisfies the security requirements in the test.
Description
Technical field
The utility model relates to a kind of impedance measurement safety starting device, and this device provides testing tool and operator's personal safety protection when starting measurement thing to be checked, and simple to operate.
Background technology
When carrying out the impedance ground measurement, must provide up to 25 amperes or above measurement electric current, judge whether ground path can bear the measurement electric current, and the situation that circuit burns can not take place according to safety standard.Therefore when beginning to measure, connecting line must be connected, restart measurement mechanism, to prevent that big electric current from contact thing to be checked moment generation spark, jeopardizing user and device to be measured.Between measuring and judging, therefore because do not connect thing to be checked as yet, differentiate whether to be the judgement system of certified products can be shown as unacceptable product always, wait to connect after the thing to be checked, the quality of thing to be checked just can normally be judged by system.
So, the essential starting switch that uses of traditional Super-Current Measurement, connect thing to be checked after, press starting switch again, cause testing apparatus must place by the thing to be checked, therefore measurement environment is restricted, perhaps must add gauge tap and start measurement mechanism, service efficiency is lower.
In addition, if use test probe (probe) is measured, probe (probe) must install starter gear additional, and probe is made the degree of difficulty height, and connecting line increases.
Therefore, the impedance measurement safety starting device security under the technology at present is low, and service efficiency is also lower.
The utility model content
For addressing the above problem, the purpose of this utility model provides a kind of function of safety protection impedance measurement safety starting device safe in utilization that has.
The another purpose of impedance measurement safety starting device of the present utility model is to reduce operating personnel's job content, raising effect.
A purpose again of impedance measurement safety starting device of the present utility model is to reduce the structure complexity of measurement mechanism, and then improves equipment reliability.
The utility model provides a kind of impedance measurement safety starting device, and this device comprises at least: one is used for providing to thing to be checked the current generator of separate current and voltage; The detection signal that one current detector and that is used to detect the current status that above-mentioned current generator exports provides according to current detector, the system control unit of Control current generator current output value;
The impedance measurement safety starting device that the utility model provides also comprises and detects that the thing end is connected, is used to show the status displays of detection thing state.
The impedance measurement safety starting device that the utility model provides, described current generator produces and is used to detect first electric current of described thing connection status to be checked and is used for formal second electric current that detects, described system control unit is according to the detection signal of described current detector output, judge whether described thing to be checked connects, when a thing to be checked is connected with described testing circuit, described system control unit is controlled described current generator and is produced described second electric current, treat formally to detect to finish, remove until above-mentioned thing to be checked, and connect another thing to be checked, before beginning detected next time, described control system was controlled described current generator and is produced described first electric current.
The impedance measurement safety starting device that the utility model provides, described first electric current is less than described second electric current.
Above-mentioned impedance measurement safety starting device is the test before in advance system being measured, by judging with the less current amount whether thing to be checked has been connected on the test fixture, this estimate of situation can continue to feed back to described system control unit, when detection has thing to be checked, promptly export a signal and make circuit increase output current, voltage, carry out test action to rated specification.The output of above-mentioned impedance measurement safety starting device using system control module Control current value, the security that has improved system has reduced starting switch, has reduced the structure complexity of system, has improved the fiduciary level and the work efficiency of system.
Description of drawings
Fig. 1 is the schematic block diagram of the utility model impedance measurement safety starting device.
Fig. 2 is the job step process flow diagram of the utility model impedance measurement safety starting device.
Embodiment
Fig. 1 is the synoptic diagram of the utility model impedance measurement safety starting device.This device mainly includes for the function of security protection is provided in the test macro: a system control unit 1, the output valve of coming the Control current generator by the signal that detects gained; One current generator 2 can provide thing one separate current to be checked and voltage, and can be according to the required value of requirement output of system control unit; One current detector 3 detects the current status that the aforementioned currents generator is exported, and the effect of security protection is provided.Aforementioned each unit, device form a testing circuit, the measurement before this testing circuit is formally measured thing to be checked in advance.
Before test, for preventing that test macro from burning and personnel's security protection problem, system control unit 1 requires current generator 2 to produce the first less electric current in order to judge whether thing 4 to be checked has been connected on the test fixture, and this estimate of situation can continue to feed back to system control unit 1 earlier; When being provided with thing 4 to be checked, the user finishes, and when all circuit all present armed state, this moment, system control unit 1 can detect the situation of thing 4 to be checked, export a semaphore request current generator 2 immediately and increase output, generation meets second electric current, the voltage of testing thing requirement to be checked, carries out test action; When test duration end or the flow process end of setting, system control unit 1 is promptly exported a semaphore request current generator 2 and is returned to first electric current, i.e. small voltage, current status.At this moment, when if thing 4 to be checked is not removed as yet, system control unit 1 is provided by the safe condition that is originally provided, just make the first small electric current of current generator 2 outputs, the state of voltage, need not carry out next step test action, after thing 4 to be checked is removed, promptly begin to start test loop next time.In addition, connect a status displays 5, the state of thing 4 ends to be checked can be presented on the status displays 5, judge the correctness of its measurement by current detector 3 compounding practice person's visual types at thing to be checked 4 two ends.
Fig. 2 is the more detailed flow chart of steps of the utility model impedance measurement safety starting device.Earlier judge with micro-current whether thing to be checked has been connected on the test fixture at step 60 current generator, this system control unit can continue to receive this signal and make connection judgment 62, when thing setting to be checked finishes 61, promptly begin to start testing apparatus 63, require current generator to increase output current, voltage to rated specification; Otherwise, then continue to keep the safety of micro-current with maintenance system and personnel.System to be tested should make quality judgement 64 by thing to be checked, and information offered the operator, definite test duration judge 65 errorless after, send " qualified " or " defective " signal, and stop " testing " signal, if detecting the GB test lead does not connect thing to be checked, turn back to the state of step 60 during this period.
Though impedance measurement safety starting device described in the utility model proving installation more in the past increases by a step that detects in advance, but utilize this circuit to cooperate the control of software, there is no too many difference in time, and provide safety guarantee for test macro and operating personnel.
The safety starter gear can be applicable on many safety requirements testing tools.
Claims (4)
1. impedance measurement safety starting device, this device comprises at least:
One is used for providing to thing to be checked (4) current generator (2) of separate current and voltage;
One is used to detect the current detector (3) of the current status that above-mentioned current generator (2) exported;
It is characterized in that:
A detection signal that provides according to current detector (3), the system control unit (1) of Control current generator (2) current output value also are provided described impedance measurement safety starting device.
2. impedance measurement safety starting device according to claim 1 is characterized in that: said apparatus also comprises and detects that the thing end is connected, is used to show the status displays (5) of detection thing state.
3. impedance measurement safety starting device according to claim 1, it is characterized in that: described current generator (2) produces and is used to detect first electric current of described thing to be checked (4) connection status and is used for formal second electric current that detects, described system control unit (1) is according to the detection signal of described current detector (3) output, judge whether described thing to be checked (4) connects, when a thing to be checked (4) is connected with described testing circuit, described system control unit (1) is controlled described current generator (2) and is produced described second electric current, treat formally to detect to finish, remove until above-mentioned thing to be checked (4), and connect another thing to be checked (4), before beginning detected next time, described control system was controlled described current generator and is produced described first electric current.
4. impedance measurement safety starting device according to claim 3 is characterized in that: described first electric current is less than described second electric current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02255164 CN2582005Y (en) | 2002-09-28 | 2002-09-28 | Safety starter for measuring impedance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02255164 CN2582005Y (en) | 2002-09-28 | 2002-09-28 | Safety starter for measuring impedance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2582005Y true CN2582005Y (en) | 2003-10-22 |
Family
ID=33723717
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02255164 Expired - Fee Related CN2582005Y (en) | 2002-09-28 | 2002-09-28 | Safety starter for measuring impedance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2582005Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102455962A (en) * | 2010-10-29 | 2012-05-16 | 上海三旗通信科技股份有限公司 | Method for automatically starting program test through current detection |
| CN101441235B (en) * | 2007-08-14 | 2012-09-05 | 福鲁克公司 | Systems and methods for an open circuit current limiter |
-
2002
- 2002-09-28 CN CN 02255164 patent/CN2582005Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101441235B (en) * | 2007-08-14 | 2012-09-05 | 福鲁克公司 | Systems and methods for an open circuit current limiter |
| US9116177B2 (en) | 2007-08-14 | 2015-08-25 | Fluke Corporation | Systems and methods for an open circuit current limiter |
| CN102455962A (en) * | 2010-10-29 | 2012-05-16 | 上海三旗通信科技股份有限公司 | Method for automatically starting program test through current detection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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 |