CN102288851A - Device for detecting connection between working ground and protected ground - Google Patents
Device for detecting connection between working ground and protected ground Download PDFInfo
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- CN102288851A CN102288851A CN201010201882XA CN201010201882A CN102288851A CN 102288851 A CN102288851 A CN 102288851A CN 201010201882X A CN201010201882X A CN 201010201882XA CN 201010201882 A CN201010201882 A CN 201010201882A CN 102288851 A CN102288851 A CN 102288851A
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Abstract
The invention discloses a device for detecting the connecting between a working ground and a protected ground. The device comprises an active circuit and a detection output circuit, wherein an input end of the active circuit is connected with the working ground and the protected ground respectively, and is used for forming an active loop with the ground through the working ground and the protected ground and detecting current of the active loop; and the detection output circuit is used for outputting a signal of reliable connection between the working ground and the protected ground when the current detection result is that current exists in the active loop, and outputting a signal of unreliable connection between the working ground and the protected ground when the current detection result is that the current does not exist in the active loop. The device can be used for effectively judging whether the working ground is in reliable connection with the protected ground through detecting the current in the active loop, and prompting an engineer to reliably reconnect the working ground and the protected ground through outputting the signal of the unreliable connection, thereby reducing electromagnetic interference to external circuits and equipment caused by the unreliable connection between the working ground and the protected ground as well as hidden dangers of reducing the reliability of a base station system, such as the burnout of a single board of the system caused by the unreliable connection.
Description
Technical field
The present invention relates to mobile communication base station system, particularly a kind of testing ground and the device of connection with being connected.
Background technology
Along with improving constantly of electronic equipment signal rate, the high frequency electric that veneer produces disturbs constantly and increases.On the one hand, owing to there are a lot of holding wires between work place and protected place, high frequency electric can be transferred to connector on the veneer by described holding wire, and then is transferred in the outside line and external equipment that links to each other with connector.Therefore, if the high frequency electric that veneer is not produced disturbs suppress, will cause the electromagnetic interference to outside line and external equipment.
On the other hand, when work place and protected place reliably do not connect, the abominable situations such as surge can take place, in addition, also may cause electric charge with can't releasing fast protection, the electromotive force in place of working is elevated, the catastrophe failure that causes system single board to burn.
At present in the mobile communication base station system; do not have testing ground and protect the device that whether reliably connects between the ground; the electromagnetic interference that veneer generation high frequency electric causes will have a strong impact on the environmental protection of communication base station, and work place and protected place reliably connect the reliability that can reduce whole base station system simultaneously.Therefore, how to design a kind of automatically testing ground and be connected the product of the connection problem that need solve with regard to becoming the industry utmost point whether reliably.
Summary of the invention
The technical problem to be solved in the present invention provide a kind of automatic detection and reporting base station system works ground and be connected the device of connection whether reliably, can better solve that work place and protected place reliably do not connect and the electromagnetic interference that causes, the problem of base station system poor stability.
A kind of testing provided by the invention ground and the device that connects comprise with being connected:
Active circuit, its input connects respectively work place and protected place, is used for forming active loop via place of working, protection ground and the earth, and to there being resource loop to carry out current detecting;
Detect output circuit; be used in the current detecting result when having resource loop to have electric current; output services ground and be connected the reliable signal that connects in ground, and in the current detecting result when having resource loop not have electric current, output services ground and be connected the signal of unreliable connection.
Compared with prior art; a kind of automatic testing provided by the invention ground and the device that whether reliably is connected with protecting; whether the backstage can reliably be connected with protection ground according to the output signal judgment task ground that detects output circuit; thereby the engineering staff is in time handled to insecure connection; minimizing is because of place of working and the unreliable problems such as electromagnetic interference (EMI) that cause that are connected in protection ground; and hidden danger such as reduced that veneer burns has improved the reliability of whole base station system.
Description of drawings
Fig. 1 is a theory diagram of the present invention;
Fig. 2 is the device process flow diagram after wireless base station that the embodiment of the invention provides powers on;
Fig. 3 is a preferred embodiment of the present invention synoptic diagram;
Fig. 4 is another preferred embodiment synoptic diagram of the present invention;
Wherein, 301 is optocoupler, and 302 is working power, and 303,304 is resistor, and 401 is monostable electromagnetic relay, and 402 is working power, and 403,404 is resistor.
Embodiment
To a preferred embodiment of the present invention will be described in detail, should be appreciated that following illustrated preferred embodiment only is used for description and interpretation the present invention, is not limited to the present invention below in conjunction with accompanying drawing.
Fig. 1 has shown theory diagram of the present invention, and as shown in Figure 1, pick-up unit (101) includes source circuit and detects output circuit.Wherein, active circuit has two inputs, and respectively cut-in operation ground and protection ground form the resource loop that has via place of working, protection ground, the earth.Detect output circuit and detect have whether the electric current existence is arranged in the resource loop, if there is electric current, represent that then work place and protected place reliably connect, the output signal that detects output circuit output is the reliable signal that connects; If there is not electric current, the then unreliable connection in work place and protected place, the output signal that detects output circuit output is the signal of unreliable connection.The reliable signal that connects can be low level signal, and then the signal of unreliable connection is high level signal; The reliable signal that connects also can be high level signal, and then the signal of unreliable connection is low level signal.
Fig. 2 has shown the device flow chart after wireless base station that this device embodiment provides powers on, as shown in Figure 2, when the output signal that detects output circuit is low level signal, judge that the place of working reliably is connected with protection ground in the present embodiment, namely low level signal is the reliable signal that connects; When the output signal that detects output circuit is high level signal, judge place of working and protection unreliable connection of ground, namely high level signal is the signal of unreliable connection.The workflow of device is: after the base station powered on, whether be low level signal, if output signal is low level signal, show that then work place and protected place reliably connect if at first detecting output signal; If output signal is high level signal, then show the unreliable connection in work place and protected place, the backstage alarm reliably connects work place and protected place again with the prompting engineering staff, and whether again detect output signal be low level signal.
Fig. 3 has shown a preferred embodiment of the present invention schematic diagram, as shown in Figure 3, describes as example as the signal of the unreliable connection in work place and protected place take output signal as high level signal in the present embodiment.
Comprise light emitting diode in the input circuit of optocoupler (301), be connected the working power (302) between light emitting diode one end and the place of working and be connected the light emitting diode other end and the resistor (303) of protection between the ground.Input circuit cut-in operation ground and protection ground form the resource loop that has via place of working, protection ground, the earth.
The output circuit of optocoupler (301) forms and detects output circuit, and being used for detecting has resource loop whether to have electric current.Described detection output circuit comprises that an end connects the photistor in place of working, is connected working power (302) and resistor (304) between the place of working and the photistor other end, and the wherein said photistor other end connects output line.
Above-mentioned resistor is used for current limliting.
If the place of working reliably is connected with protection ground; so behind the input circuit cut-in operation of optocoupler (301) ground and the protection ground; formation is via the resource loop that has of place of working, protection ground, the earth; produce electric current in the active circuit; optocoupler (301) conducting; the detection output circuit has detected and has had electric current in the resource loop, and then the output signal through output line is the signal of low level reliable connection.If the unreliable connection in work place and protected place; then having does not have electric current to exist in the resource loop, the detection output circuit can't detect and has electric current in the active circuit, and optocoupler (301) ends; therefore, the output signal through output line is the signal of the unreliable connection of high level.
Shown in the accompanying drawing 4 is another preferred embodiment synoptic diagram of the present invention, as shown in Figure 4, in the present embodiment is that high level signal is that example describes as the place of working with the unreliable signal that is connected in protection ground with the output signal.
One end of the input circuit of monostable electromagnetic relay (401) by working power (402) link to each other with the place of working, the resistor (403) of the other end by being used for current limliting link to each other with protection ground, forms the resource loop that has via protection ground, place of working, the earth.
The output circuit of monostable electromagnetic relay (401) forms and detects output circuit, and being used for detecting has resource loop whether to have electric current.Described detection output circuit comprises relay first stationary contact that connects the place of working, relay second stationary contact that connects place of working, working power (402) and resistor (404) series circuit, and connect the relay moving contact of output line with output signal.Wherein, the switch between relay moving contact and relay second stationary contact is a normally closed switch.
If work place and protected place reliably connect; behind the input circuit cut-in operation ground and protection ground of so monostable electromagnetic relay (401); formation is via the resource loop that has of place of working, protection ground, the earth; have and have electric current in the resource loop; the switch closure between relay movable contact and relay first stationary contact then; namely detect output circuit and detect and have electric current in the active circuit, then the output signal via output line is the signal of low level reliable connection.If the unreliable connection in work place and protected place; behind the input circuit cut-in operation ground and protection ground of so monostable electromagnetic relay (401); the detection output circuit can't detect resource loop and has had electric current; then the switch between relay movable contact and relay first stationary contact disconnects; therefore, the output signal via output line is the signal of the unreliable connection of high level.
In sum; the present invention uses active circuit cut-in operation ground and protection ground to form via the place of working; protect the resource loop that has of ground and the earth; the existence that electric current in the resource loop is arranged by detection whether; judge effectively whether work place and protected place reliably connect; thereby in work place and protected place during unreliable connection; the unreliable connection in work place and protected place can be judged by the signal of unreliable connection in the backstage; thereby the engineering staff is in time reliably connected work place and protected place; the electromagnetic interference to outside line and equipment that minimizing causes because of the unreliable connection in work place and protected place, and the hidden danger of burning the reduction base station system reliabilities such as system single board.
Although above the present invention is had been described in detail, the invention is not restricted to this, those skilled in the art of the present technique can carry out various modifications according to principle of the present invention.Therefore, all modifications of making according to the principle of the invention all should be understood to fall into protection scope of the present invention.
Claims (5)
1. testing ground and the device of connection is characterized in that with being connected, comprising:
Active circuit, its input connects respectively work place and protected place, is used for forming active loop via place of working, protection ground and the earth, and to there being resource loop to carry out current detecting;
Detect output circuit; be used in the current detecting result when having resource loop to have electric current; output services ground and be connected the reliable signal that connects in ground, and in the current detecting result when having resource loop not have electric current, output services ground and be connected the signal of unreliable connection.
2. the device that testing according to claim 1 ground is connected with protection ground; it is characterized in that; described active circuit is the input circuit of optocoupler, comprises light emitting diode, is connected the working power between light emitting diode one end and the place of working and is connected the light emitting diode other end and the resistor of protection between the ground.
3. the device that testing according to claim 2 ground is connected with protection ground; it is characterized in that; described detection output circuit is the output circuit of optocoupler; comprise that an end connects the photistor in place of working, is connected working power and resistor between the place of working and the photistor other end, the wherein said photistor other end connects output line.
4. the device that testing according to claim 1 ground is connected with protection ground; it is characterized in that; described active circuit is the input circuit of electromagnetic relay, comprises the relay winding, is connected the working power between relay winding one end and the place of working and is connected the relay winding other end and the resistor of protection between the ground.
5. the device that testing according to claim 4 ground is connected with protection ground; it is characterized in that; described detection output circuit is the output circuit of electromagnetic relay; comprise relay first stationary contact that connects the place of working; relay second stationary contact that connects place of working, working power and resistor in series circuit, and the relay moving contact that connects output line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010201882XA CN102288851A (en) | 2010-06-17 | 2010-06-17 | Device for detecting connection between working ground and protected ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010201882XA CN102288851A (en) | 2010-06-17 | 2010-06-17 | Device for detecting connection between working ground and protected ground |
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| Publication Number | Publication Date |
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| CN102288851A true CN102288851A (en) | 2011-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010201882XA Pending CN102288851A (en) | 2010-06-17 | 2010-06-17 | Device for detecting connection between working ground and protected ground |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2342455A (en) * | 1997-10-20 | 2000-04-12 | Chang Yang Hsueh | Anti-static earth connection test system |
| CN201156662Y (en) * | 2008-01-27 | 2008-11-26 | 陈校波 | Earthing detection protection circuit controlled by micro-controller |
| CN101419265A (en) * | 2008-12-05 | 2009-04-29 | 韩俊 | Signal generating circuit for detecting protective earthing connecting status |
| US20090315538A1 (en) * | 2006-11-23 | 2009-12-24 | Jun Han | Signal generating circuit for detecting ground status |
| CN201477166U (en) * | 2009-08-20 | 2010-05-19 | 杭州鸿尔泰电器有限公司 | Automatic detection module for failure of working grounding cable |
-
2010
- 2010-06-17 CN CN201010201882XA patent/CN102288851A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2342455A (en) * | 1997-10-20 | 2000-04-12 | Chang Yang Hsueh | Anti-static earth connection test system |
| US20090315538A1 (en) * | 2006-11-23 | 2009-12-24 | Jun Han | Signal generating circuit for detecting ground status |
| CN201156662Y (en) * | 2008-01-27 | 2008-11-26 | 陈校波 | Earthing detection protection circuit controlled by micro-controller |
| CN101419265A (en) * | 2008-12-05 | 2009-04-29 | 韩俊 | Signal generating circuit for detecting protective earthing connecting status |
| CN201477166U (en) * | 2009-08-20 | 2010-05-19 | 杭州鸿尔泰电器有限公司 | Automatic detection module for failure of working grounding cable |
Non-Patent Citations (1)
| Title |
|---|
| 丁小东: "电子设备的接地和接地设计", 《环境技术》 * |
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Application publication date: 20111221 |