CN212111736U - Device for monitoring grounding state of PE grounding wire - Google Patents
Device for monitoring grounding state of PE grounding wire Download PDFInfo
- Publication number
- CN212111736U CN212111736U CN201922321458.8U CN201922321458U CN212111736U CN 212111736 U CN212111736 U CN 212111736U CN 201922321458 U CN201922321458 U CN 201922321458U CN 212111736 U CN212111736 U CN 212111736U
- Authority
- CN
- China
- Prior art keywords
- monitoring
- unit
- loop
- grounding
- chip microcomputer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
An apparatus for monitoring a grounding state of a PE grounding wire, comprising: DC direct current supply unit, singlechip, first monitoring unit, wherein: the DC direct current power supply unit is connected with the single chip microcomputer so as to supply power to the single chip microcomputer; the first monitoring unit is connected with the single chip microcomputer and at least comprises a first electric connection end and a second electric connection end; the PE grounding wire forms a monitoring loop through the first electric connection end and the second electric connection end; the single chip microcomputer provides first direct current low-voltage power supply for the monitoring loop and monitors the monitoring loop so as to monitor the grounding state of the PE grounding wire. Therefore, the device capable of monitoring the grounding state in real time is realized, so that the safety in the test or operation process is improved, and the reliability of test data is guaranteed.
Description
Technical Field
The field belongs to the field of electric power, and particularly relates to a device for monitoring the grounding state of a PE grounding wire.
Background
In the field of electric power, according to the regulations of electric power safety work regulations, the shell of various devices including experimental instruments and equipment should be reliably grounded (PE grounded).
The PE (protecting earth) wire can endanger personal safety when the conditions that the earth wire is not connected, the wire is broken, the far end of the earth wire head is loosened and cannot be found in time in the use process; when the PE grounding wire is used for testing equipment, if the grounding is poor, the test data is inaccurate, and the equipment state cannot be accurately judged.
SUMMERY OF THE UTILITY MODEL
In view of the above problem, the present disclosure discloses an apparatus for monitoring a grounding state of a PE grounding wire, including:
DC direct current supply unit, singlechip, first monitoring unit, wherein:
the DC direct current power supply unit is connected with the single chip microcomputer so as to supply power to the single chip microcomputer;
the first monitoring unit is connected with the single chip microcomputer and at least comprises a first electric connection end and a second electric connection end;
the PE grounding wire forms a monitoring loop through the first electric connection end and the second electric connection end;
the single chip microcomputer provides first direct current low-voltage power supply for the monitoring loop and monitors the monitoring loop so as to monitor the grounding state of the PE grounding wire.
Preferably, the first and second liquid crystal materials are,
the first monitoring unit further comprises a third electrical connection terminal.
Preferably, the first and second liquid crystal materials are,
the device also comprises a self-checking unit;
the self-checking unit is used for establishing a self-checking loop with the first monitoring unit;
and the singlechip supplies second direct-current low-voltage power to the self-checking loop and checks the self-checking loop to detect whether the condition of the first monitoring unit is normal or not.
Preferably, the first and second liquid crystal materials are,
the device further comprises a switching unit for switching between the self-test loop and the monitoring loop.
Preferably, the first and second liquid crystal materials are,
the DC direct current power supply unit comprises an isolation power supply module.
Preferably, the first and second liquid crystal materials are,
the device also comprises an alarm unit which alarms in a sound-light alarm mode when the grounding state is abnormal.
Preferably, the first and second liquid crystal materials are,
the device also comprises a user interaction unit, wherein the user interaction unit comprises an entity key or a virtual touch key;
the entity keys or the virtual touch keys at least comprise a first key and a second key, and each key is connected with the single chip microcomputer; when the first key is triggered, the device starts to work; the device is capable of interrupting the alarm for an earth fault when the second key is activated.
Preferably, the first and second liquid crystal materials are,
the device also includes a thermal protection unit.
Preferably, the first and second liquid crystal materials are,
the device is mounted in a cavity in the middle of a power wire coil in a matching mode, and/or a DC direct current power supply unit of the device obtains electricity through the power wire coil.
Preferably, the first and second liquid crystal materials are,
the apparatus also includes a memory for storing a ground state.
Through the technical scheme, the device capable of monitoring the grounding state in real time is realized, so that the safety in a test or operation process is improved, and the reliability of test data is guaranteed.
Drawings
FIG. 1 is a schematic structural diagram of one embodiment of the present disclosure;
fig. 2 is a circuit schematic of another embodiment of the present disclosure.
Detailed Description
In order to make those skilled in the art understand the technical solutions disclosed in the present disclosure, the technical solutions of various embodiments will be described below with reference to the embodiments and the accompanying fig. 1 to 2, where the described embodiments are some embodiments of the present disclosure, but not all embodiments. The terms "first," "second," and the like as used in this disclosure are used for distinguishing between different objects and not for describing a particular order. Furthermore, "include" and "have," as well as any variations thereof, are intended to cover and not to exclude inclusions. For example, a process, method, system, or article or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, system, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the disclosure. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It will be appreciated by those skilled in the art that the embodiments described herein may be combined with other embodiments.
In one embodiment, the present disclosure discloses an apparatus for monitoring a grounding state of a PE grounding line, including:
DC direct current supply unit, singlechip, first monitoring unit, wherein:
the DC direct current power supply unit is connected with the single chip microcomputer so as to supply power to the single chip microcomputer;
the first monitoring unit is connected with the single chip microcomputer and at least comprises a first electric connection end and a second electric connection end;
the PE grounding wire forms a monitoring loop through the first electric connection end and the second electric connection end;
the single chip microcomputer provides first direct current low-voltage power supply for the monitoring loop and monitors the monitoring loop so as to monitor the grounding state of the PE grounding wire.
For the above embodiment, the DC power supply unit provides a necessary working power supply for the single chip microcomputer; singlechip and first monitoring element then are used for monitoring the ground connection state of PE earth connection, and its ingenious utilization: the PE grounding wire forms a monitoring loop through the first electric connection end and the second electric connection end; and the singlechip provides first direct current low voltage power supply for the monitoring loop and monitors the monitoring loop so as to monitor the grounding state of the PE grounding wire. Considering that the power supply of the single chip microcomputer includes +5V and +3.3V, the DC direct current power supply unit preferentially outputs +5V or + 3.3V. As for the first direct current low voltage, the voltage can also be selected to be +5V or +3.3V, which also accords with the safety range, and when the voltage is output, the pulse direct current modulated by PWM can be output through the singlechip, and continuous and smooth direct current can also be output.
For example, but not by way of limitation, the single chip microcomputer may monitor whether the current of the monitoring loop exists all the time to determine the grounding state, and when the current is suddenly interrupted, the loop is not on, which means that the ground is likely to have abnormality such as disconnection or loosening. Or, the single chip microcomputer can monitor whether the resistance of the monitoring loop is abnormal, and if the resistance of the monitoring loop is abnormal, the ground fault is probably indicated.
In another embodiment, the first and second electrical connections may be provided via a two-phase plug or a two-phase jack, thereby facilitating the device to interface with the PE connection line via the two-phase plug or the two-phase jack.
In another embodiment, the first monitoring unit further comprises a third electrical connection.
It will be appreciated that when a third electrical connection is included, the first monitoring unit may provide the first to third electrical connections in the form of a three-phase jack.
In another embodiment of the present invention, the substrate is,
the device also comprises a self-checking unit;
the self-checking unit is used for establishing a self-checking loop with the first monitoring unit;
and the singlechip supplies second direct-current low-voltage power to the self-checking loop and checks the self-checking loop to detect whether the condition of the first monitoring unit is normal or not.
For this embodiment, the purpose is to check whether the condition of the first monitoring unit is normal, for example, including but not limited to checking: the first electrical connection end and the second electrical connection end can conduct electricity. Wherein, the second direct current low voltage can also be selected to be +5V or + 3.3V.
In another embodiment of the present invention, the substrate is,
the device further comprises a switching unit for switching between the self-test loop and the monitoring loop.
It can be understood that after the self-checking is finished, the working state of the device can be switched to, at the moment, the switching unit can be used for conveniently switching, and after the switching, the singlechip monitors the monitoring loop in real time so as to master the grounding state.
In another embodiment of the present invention, the substrate is,
the DC direct current power supply unit comprises an isolation power supply module.
It can be understood that the isolation power supply module is adopted to play an isolation role and ensure the electricity utilization safety of the device.
In another embodiment of the present invention, the substrate is,
the device also comprises an alarm unit which alarms in a sound-light alarm mode when the grounding state is abnormal.
For this embodiment, it is intended to alarm in time, avoiding losses.
In another embodiment of the present invention, the substrate is,
the device also comprises a user interaction unit, wherein the user interaction unit comprises an entity key or a virtual touch key;
the entity keys or the virtual touch keys at least comprise a first key and a second key, and each key is connected with the single chip microcomputer; when the first key is triggered, the device starts to work; the device is capable of interrupting the alarm for an earth fault when the second key is activated.
For this embodiment, manual control of the operation of the device is achieved by said user interaction unit. If the alarm is used in a simple way, a user interaction unit is not provided, and the singlechip calls related firmware or programs to automatically perform self-checking and automatically interrupt the alarm after the alarm is given for a period of time.
In another embodiment of the present invention, the substrate is,
the device also includes a thermal protection unit.
In another embodiment of the present invention, the substrate is,
the device is mounted in a cavity in the middle of a power wire coil in a matching mode, and/or a DC direct current power supply unit of the device obtains electricity through the power wire coil.
This embodiment allows in the art to realize a new power cord reel with monitoring of the grounding condition of the PE ground wires due to the present device fitted in its intermediate cavity. Furthermore, preferably, the DC power supply unit is supplied with external electric energy by using the power wire coil's ability to take power from an external power source, and at this time, the DC power supply unit may include an AC/DC module so as to take power directly from the 220V or even 380V power wire coil. Of course, as previously mentioned, it is preferred to employ an isolated power module.
In another embodiment of the present invention, the substrate is,
the apparatus also includes a memory for storing a ground state.
It can be understood that this is to fully record the ground state, so as to facilitate the post analysis or statistics, so as to improve the problems in the operation process.
In another embodiment of the present invention, the substrate is,
the device also includes a second monitoring unit. Preferably, the device further provides a third monitoring unit. Therefore, the device can make full use of the processing capacity of the single chip microcomputer and provide multi-path monitoring capacity so as to monitor the grounding states of the plurality of grounding wires.
In another embodiment of the present invention, the substrate is,
the utility model discloses a power drum with PE earth connection real-time supervision function comprises embedded singlechip system of observing and controling, PE ground state LED lamp display circuit, audible-visual alarm module and key input module. The power line panel has a good PE monitoring effect. The whole device is small in size and powerful, is completely embedded into the power panel, does not affect the normal use of the power panel, and ensures the safety of a monitoring loop by adopting a completely isolated positive 5-volt power supply for the monitoring voltage of the loop.
The power supply wire coil composition structure with PE grounding state monitoring is shown in fig. 1, and is composed of an embedded single chip microcomputer measurement and control system (wherein the single chip microcomputer specifically refers to a low-power consumption embedded single chip microcomputer STM32L151C8T6 in fig. 1), an isolated power supply module, an audible and visual alarm unit, an LED indicator lamp set (not shown in the figure), a multi-path PE monitoring output module (for example, PE monitoring output 1, PE monitoring output 2, PE monitoring output 3, and PE monitoring output 4 in fig. 1), a PE power connection detection module (for example, a power supply end PE detection unit in fig. 1, that is, an implementation manner of the above self-detection unit), a key input module, and the like.
(1) Embedded single-chip microcomputer measurement and control system
The system is composed of an industrial-grade low-power-consumption embedded single chip microcomputer and a peripheral circuit, realizes the functions of detection, control, display and the like of the whole system, and has high reliability and higher processing speed.
(2) Isolated power supply module
A miniaturized AC/DC power supply module is adopted, the effective isolation voltage is 3000Vpp, the power supply power is 2W, and the power supply voltage is + 5V.
(3) PE connects electric detection module
A220 alternating current power supply of a power supply wire coil is utilized, a pulsating direct current signal formed after rectification is injected into a PE wire for a short time (about 1 second) through a current limiting resistor of 100k ohm, so that whether the state of a PE end of the power supply is good or not is detected, and then the PE wire is switched into an output loop of state monitoring through a relay.
(4) Key input module
2 function keys of the power supply wire coil panel are respectively a 'monitoring' button and a 'returning' button. When a 'monitoring' button is pressed, the monitoring indicator lamp flickers at a rate of 1 second per time, which means that the current PE grounding output line is monitored, and when a certain PE line changes from 'presence' to 'absence', an audible and visual signal alarm is given. The "return" (also called "reset") button has two functions, namely, the button can be a multiplexing button, when the button is pressed for a short time (for example, less than 1 second), the current alarm sound is silenced without exiting the PE state monitoring, and when the button is pressed for a long time (for example, more than 1 second), the singlechip control system exits the PE state monitoring, and at the moment, any state of the PE monitoring loop does not perform sound alarm any more, but does not affect the states of the on and off indicator lights of the PE grounding loop.
(5) PE monitoring output
In the aspect of PE monitoring, multiple independent monitoring outputs, such as the 4-way PE monitoring output shown in fig. 1, may be provided. When the PE output end is effectively connected with the instrument through a three-terminal (namely, a zero terminal, a fire terminal and a ground terminal) power plug and is grounded, a grounding indicator lamp of a related loop is automatically lightened by hardware. And simultaneously, the embedded single chip microcomputer performs real-time logic sampling judgment on the potential of each PE output end, the sampling signal is 0 to indicate that the grounding is normal, the sampling signal is 1 to indicate that the grounding loop is not communicated, and the signal is used for monitoring the PE state, so that multi-path monitoring is realized. It can be appreciated that the present disclosure employs 2 of the terminals to detect the path. In summary, the use of the relevant terminals in this disclosure, rather than taking power or supplying power in the traditional sense, is used for the above monitoring.
By way of example, fig. 2 shows a schematic circuit diagram of the above-described embodiment.
As described above, the above embodiments are only used to illustrate the technical solutions of the present disclosure, and not to limit the same; although the present disclosure has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present disclosure.
Claims (10)
1. An apparatus for monitoring a grounding state of a PE grounding wire, comprising:
DC direct current supply unit, singlechip, first monitoring unit, wherein:
the DC direct current power supply unit is connected with the single chip microcomputer so as to supply power to the single chip microcomputer;
the first monitoring unit is connected with the single chip microcomputer and at least comprises a first electric connection end and a second electric connection end;
the PE grounding wire forms a monitoring loop through the first electric connection end and the second electric connection end;
the single chip microcomputer provides first direct current low-voltage power supply for the monitoring loop and monitors the monitoring loop so as to monitor the grounding state of the PE grounding wire.
2. The apparatus of claim 1, wherein:
the first monitoring unit further comprises a third electrical connection terminal.
3. The apparatus of claim 1, wherein:
the device also comprises a self-checking unit;
the self-checking unit is used for establishing a self-checking loop with the first monitoring unit;
and the singlechip supplies second direct-current low-voltage power to the self-checking loop and checks the self-checking loop to detect whether the condition of the first monitoring unit is normal or not.
4. The apparatus of claim 3, wherein:
the device further comprises a switching unit for switching between the self-test loop and the monitoring loop.
5. The apparatus of claim 1, wherein:
the DC direct current power supply unit comprises an isolation power supply module.
6. The apparatus of claim 1, wherein:
the device also comprises an alarm unit which alarms in a sound-light alarm mode when the grounding state is abnormal.
7. The apparatus of claim 1, wherein:
the device also comprises a user interaction unit, wherein the user interaction unit comprises an entity key or a virtual touch key;
the entity keys or the virtual touch keys at least comprise a first key and a second key, and each key is connected with the single chip microcomputer; when the first key is triggered, the device starts to work; the device is capable of interrupting the alarm for an earth fault when the second key is activated.
8. The apparatus of claim 1, wherein:
the device also includes a thermal protection unit.
9. The apparatus of claim 1, wherein:
the device is mounted in a cavity in the middle of a power wire coil in a matching mode, and/or a DC direct current power supply unit of the device obtains electricity through the power wire coil.
10. The apparatus of claim 1, wherein:
the apparatus also includes a memory for storing a ground state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922321458.8U CN212111736U (en) | 2019-12-20 | 2019-12-20 | Device for monitoring grounding state of PE grounding wire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922321458.8U CN212111736U (en) | 2019-12-20 | 2019-12-20 | Device for monitoring grounding state of PE grounding wire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212111736U true CN212111736U (en) | 2020-12-08 |
Family
ID=73625534
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922321458.8U Expired - Fee Related CN212111736U (en) | 2019-12-20 | 2019-12-20 | Device for monitoring grounding state of PE grounding wire |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212111736U (en) |
-
2019
- 2019-12-20 CN CN201922321458.8U patent/CN212111736U/en not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108550244B (en) | Safety grounding monitoring alarm device with multiple channels | |
| CN212749196U (en) | Input/output ground wire detection circuit | |
| CN105044542A (en) | State automatic detection method of temporary grounding line of electrical equipment | |
| CN207557400U (en) | A kind of low voltage failure circuit investigates instrument | |
| CN212111736U (en) | Device for monitoring grounding state of PE grounding wire | |
| CN202353313U (en) | Monitoring system of power supply equipment for power | |
| CN107276024A (en) | One kind electric leakage monitoring device | |
| CN208256069U (en) | A kind of safety ground monitoring alarm with multichannel | |
| CN208833834U (en) | Residual current monitors system | |
| CN207851154U (en) | A kind of detection of Power System Intelligent and protection output device | |
| CN110865703A (en) | Power distribution unit PDU and cabinet power monitoring system | |
| CN208753985U (en) | Intelligent lightning protection device and the lightning protection box for protecting three-phase circuit | |
| CN106066445A (en) | Voltage transformer open delta circuit breaking monitoring device and application process | |
| CN216086135U (en) | Online comprehensive intelligent circuit breaker | |
| CN207611461U (en) | A kind of microcomputer protecting device with fire monitoring function | |
| CN208092163U (en) | A kind of EKL5-D-Q novel cables type accident indicator | |
| CN206725721U (en) | Alarm relay protection device | |
| CN206992687U (en) | A kind of electrical management device based on power line communication technology | |
| CN208580151U (en) | A kind of power information acquisition terminal with higher hamonic wave monitoring function | |
| CN106160236A (en) | Power supply online monitoring system | |
| CN207303980U (en) | A kind of earth leakage protective device with auto-alarm function | |
| CN207833305U (en) | A kind of computer network automatic control device | |
| CN207249077U (en) | A kind of energy saving fire-fighting emergency power supply condition checkout gear | |
| CN208752157U (en) | Portable high-pressure direct current cabinet PDU socket detector | |
| CN202204899U (en) | Fire prevention detector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201208 Termination date: 20211220 |