CN102928730A - Grounding detection device - Google Patents
Grounding detection device Download PDFInfo
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- CN102928730A CN102928730A CN2012104259302A CN201210425930A CN102928730A CN 102928730 A CN102928730 A CN 102928730A CN 2012104259302 A CN2012104259302 A CN 2012104259302A CN 201210425930 A CN201210425930 A CN 201210425930A CN 102928730 A CN102928730 A CN 102928730A
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- grounding
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Abstract
The invention relates to a grounding detection device which is used for carrying out grounding status detection on the devices which have grounding requirements and are to be detected. The grounding detection device consists of a power supply, a current limit resistor, an auxiliary detection line, a trigger, an alarm unit, a signal driving unit and an alternating current contactor. The grounding detection device has the beneficial effect of giving continuous sound-light alarms to prompt the users and ensure the product safety and the personal safety when the function modules for grounding detection have ground wire breakage or bad contact.
Description
Technical field:
The present invention relates to a kind of ground detection device, this device is specially adapted to ensure the good contact between monitored equipment over the ground.
Background technology:
In the various application of electron trade, a lot of places need that a certain local module contacts well over the ground on support equipment or the equipment.For example, in the operational process of craft of manual gold wire bonding, wafer-supporting platform is heated to suitable temperature, operating personnel ceaselessly move wafer-supporting platform or rotate with hand, make and treat on the wafer-supporting platform that the bonding zone is in and carry out bonding under the bonding head, for products quality guarantee and personal safety, wafer-supporting platform requires ground connection good.And for example, in manual eutectic welding technology, also be not stop mobile heating wafer-supporting platform, to ensure that also ground connection is good.
For support equipment or wherein a certain local module contact over the ground well, generally can adopt regular detection can satisfy request for utilization.But for above-mentioned situation about mentioning (or similar situation), the one, operating personnel need to move wafer-supporting platform with hand, the 2nd, the product on the wafer-supporting platform has much grounding requirement, these 2 all requirement ground wire can not occur and contact bad situation and occur.But in operational process of craft, operating personnel are mobile wafer-supporting platform ceaselessly, will the spot thread breakage or the situation of loose contact, and there is certain randomness the time and the position that occur.
In order to solve the real-time detection to ground wire contact situation, can adopt the mode of neon bulb, if during the ground thread breakage, produce induced voltage on the wafer-supporting platform, neon bulb is luminous.But mainly there are two problems in this mode: when first induced voltage was not high, neon bulb was not luminous, and it two is exactly that loose contact is difficult for being found.
Summary of the invention:
The objective of the invention is the shortcoming and the drawback that exist in order to solve above-mentioned testing process, increase grounding wire detection device, ruptured by geodesic line or during loose contact and alarm, remove a hidden danger.
For realizing purpose of the present invention, following technical solution has been proposed:
A kind of ground detection device is characterized in that: be comprised of power supply, current-limiting resistance, auxiliary detection line, trigger, alarm unit, signal driving unit and A.C. contactor;
The shell of auxiliary detection line one termination device to be detected, the other end joins as the input end of check point and trigger and the positive pole of power supply;
The level signal of the input end test-accepting point of trigger, its output signal is given alarm unit;
Alarm unit is accepted the output signal of trigger, and outputs to signal driving unit;
Signal driving unit is accepted the signal that alarm unit is sent here, and outputs to the input end of A.C. contactor;
A.C. contactor is serially connected with in the device input and output circuit to be detected, and receives signal that signal driving unit sends here with the break-make of control A.C. contactor.
In the technical scheme of the present invention, be connected by ground wire between device to be detected and the earth point, increase check point, check point generally be beneficial near the earth point and earth point between carry out voltage ratio.
Check point one end by detection line connect device to be detected, the other end accesses high level by current-limiting resistance.
When ground wire and detection line contact when good, check point voltage is all low level mutually with ground, and when ground wire fracture or loose contact, the check point level becomes high level from low level.Change the control alarm unit by the check point level, to realize the real-time detection to ground wire.
Advantage of the present invention:
The present invention compared with prior art, its remarkable advantage is:
Adopt this ground detection device, can detect in real time module Grounding to be detected, when ground thread breakage or loose contact, in time send warning, take measures, the product quality problem that occurs when preventing the ground wire loose contact and personal injury problem.
Description of drawings:
Fig. 1 is that device to be detected can heat the wafer-supporting platform structural drawing;
Fig. 2 is the theory diagram of ground detection device of the present invention;
Fig. 3 is the flip-flop circuit figure among Fig. 2.
Embodiment:
In the technological process of manual spun gold ball bonding, wafer-supporting platform is heated to suitable temperature, and operating personnel do not stop mobile wafer-supporting platform with hand, and for products quality guarantee and personal safety, wafer-supporting platform requires ground connection good.For this reason, increased ground detection device.
Below in conjunction with accompanying drawing most preferred embodiment of the present invention is described in further detail:
Can heat the structure of wafer-supporting platform as shown in Figure 1.Heater element is equipped with in wafer-supporting platform inside, and the temperature control of warm table is controlled by the closed network that temperature controller, thermopair, solid-state relay and heater element form.
According to technological requirement temperature controller is arranged, the actual temperature of thermopair feedback warm table, temperature controller is according to the observed temperature of warm table and the difference of setting value, the break-make of control solid-state relay, finish the power control to warm table, make warm table reach default temperature, the heating voltage of wafer-supporting platform is generally controlled 220V alternating voltage here.
Can heat between wafer-supporting platform and the earth point and be connected by ground wire, during such as spot thread breakage or loose contact, usually can occur the induced voltage of tens volts even upper hectovolt on the wafer-supporting platform.
For the ground connection that can heat wafer-supporting platform is measured in real time, and when the ground wire loose contact occurs, can disconnect the power supply of wafer-supporting platform, adopt ground detection device shown in Figure 2, this device is comprised of power supply, current-limiting resistance, auxiliary detection line, trigger, alarm unit, signal driving unit and A.C. contactor.Check point links to each other with the wafer-supporting platform shell by the auxiliary detection line, when the grounding connection line is excellent, check point links to each other with earth point with the grounding connection line by the auxiliary detection line, the check point current potential is electronegative potential, when the grounding connection thread breakage or come in contact when bad, the check point current potential becomes high level or moment becomes high level, high level appears in check point, trigger generation trigger action, state changes, the output trigger pip is to alarm unit, alarm unit sound (or light) report to the police, notify operating personnel to note.Simultaneously, alarm unit output AC contactor control signal, behind signal driver, the adhesive A.C. contactor.The connected mode of the A.C. contactor among Fig. 2 is normal open state when being no power, and when the A.C. contactor adhesive, the contact disconnects, the wafer-supporting platform stopped heating.
In order to realize that when check point voltage became high level, trigger produced retainable trigger pip, can adopt flip-flop circuit shown in Figure 3, wherein 1 end signal of trigger is exported to alarm unit.
Adopt this ground detection device, can detect in real time module Grounding to be detected, when ground thread breakage or loose contact, in time send warning, take measures, the product quality problem that occurs when preventing the ground wire loose contact and personal safety problem.
Claims (1)
1. a ground detection device is characterized in that: be comprised of power supply, current-limiting resistance, auxiliary detection line, trigger, alarm unit, signal driving unit and A.C. contactor;
Shell, the other end that auxiliary detection line one end connects device to be detected join as the input end of check point and trigger and the positive pole of power supply;
The level signal of the input end test-accepting point of trigger, its output signal is given alarm unit;
Alarm unit is accepted the output signal of trigger, and outputs to signal driving unit;
Signal driving unit is accepted the signal that alarm unit is sent here, and outputs to the input end of A.C. contactor;
A.C. contactor is serially connected with in the device input and output circuit to be detected, and receives signal that signal driving unit sends here with the break-make of control A.C. contactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210425930.2A CN102928730B (en) | 2012-10-31 | 2012-10-31 | A kind of ground detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210425930.2A CN102928730B (en) | 2012-10-31 | 2012-10-31 | A kind of ground detection device |
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| Publication Number | Publication Date |
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| CN102928730A true CN102928730A (en) | 2013-02-13 |
| CN102928730B CN102928730B (en) | 2016-01-27 |
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| CN201210425930.2A Active CN102928730B (en) | 2012-10-31 | 2012-10-31 | A kind of ground detection device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104833891A (en) * | 2014-02-11 | 2015-08-12 | 英飞凌科技股份有限公司 | Ground fault detection |
| CN105572522A (en) * | 2014-10-09 | 2016-05-11 | 台达电子工业股份有限公司 | Grounding detection device and method thereof, relay operation detection device and method thereof |
| CN105676049A (en) * | 2016-01-18 | 2016-06-15 | 华为技术有限公司 | Circuit for detecting poor grounding |
| CN110553747A (en) * | 2019-08-30 | 2019-12-10 | 华为技术有限公司 | device, method and system for detecting thermal runaway of electrical equipment |
| CN116124389A (en) * | 2023-04-19 | 2023-05-16 | 合智熔炼装备（上海）有限公司 | Crucible leakage detection pre-judging device and detection method thereof |
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| JP2004096818A (en) * | 2002-08-29 | 2004-03-25 | Mitsubishi Electric Corp | Ground fault interrupter |
| JP2006141111A (en) * | 2004-11-11 | 2006-06-01 | Mitsubishi Electric Corp | Earth fault detector |
| CN1982900A (en) * | 2005-12-14 | 2007-06-20 | 比亚迪股份有限公司 | Grounding inspector and electrostatic spraying system |
| CN200954566Y (en) * | 2006-09-04 | 2007-10-03 | 孟加顷 | Quick returning-to-temperature electric iron with earthing immediatly monitoring function |
| CN101762773A (en) * | 2010-01-19 | 2010-06-30 | 山东科汇电力自动化有限公司 | Detection method and detection device for ground protection of high-voltage equipment |
| CN201589839U (en) * | 2009-12-25 | 2010-09-22 | 上海希明电气技术有限公司 | Integrated device for inspecting ground fault of direct-current system |
| CN202256570U (en) * | 2011-10-31 | 2012-05-30 | 惠州市蓝微电子有限公司 | Earthing wire detecting circuit |
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2012
- 2012-10-31 CN CN201210425930.2A patent/CN102928730B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004096818A (en) * | 2002-08-29 | 2004-03-25 | Mitsubishi Electric Corp | Ground fault interrupter |
| JP2006141111A (en) * | 2004-11-11 | 2006-06-01 | Mitsubishi Electric Corp | Earth fault detector |
| CN1982900A (en) * | 2005-12-14 | 2007-06-20 | 比亚迪股份有限公司 | Grounding inspector and electrostatic spraying system |
| CN200954566Y (en) * | 2006-09-04 | 2007-10-03 | 孟加顷 | Quick returning-to-temperature electric iron with earthing immediatly monitoring function |
| CN201589839U (en) * | 2009-12-25 | 2010-09-22 | 上海希明电气技术有限公司 | Integrated device for inspecting ground fault of direct-current system |
| CN101762773A (en) * | 2010-01-19 | 2010-06-30 | 山东科汇电力自动化有限公司 | Detection method and detection device for ground protection of high-voltage equipment |
| CN202256570U (en) * | 2011-10-31 | 2012-05-30 | 惠州市蓝微电子有限公司 | Earthing wire detecting circuit |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104833891A (en) * | 2014-02-11 | 2015-08-12 | 英飞凌科技股份有限公司 | Ground fault detection |
| CN104833891B (en) * | 2014-02-11 | 2018-05-01 | 英飞凌科技股份有限公司 | Earth Fault Detection |
| CN105572522A (en) * | 2014-10-09 | 2016-05-11 | 台达电子工业股份有限公司 | Grounding detection device and method thereof, relay operation detection device and method thereof |
| CN105572522B (en) * | 2014-10-09 | 2018-09-04 | 台达电子工业股份有限公司 | Ground detection device and its method, actuating of relay detection device and its method |
| CN105676049A (en) * | 2016-01-18 | 2016-06-15 | 华为技术有限公司 | Circuit for detecting poor grounding |
| CN110553747A (en) * | 2019-08-30 | 2019-12-10 | 华为技术有限公司 | device, method and system for detecting thermal runaway of electrical equipment |
| CN116124389A (en) * | 2023-04-19 | 2023-05-16 | 合智熔炼装备（上海）有限公司 | Crucible leakage detection pre-judging device and detection method thereof |
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| Publication number | Publication date |
|---|---|
| CN102928730B (en) | 2016-01-27 |
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