CN207502600U - The ground wire monitor that a kind of band is examined automatically - Google Patents
The ground wire monitor that a kind of band is examined automatically Download PDFInfo
- Publication number
- CN207502600U CN207502600U CN201721515856.8U CN201721515856U CN207502600U CN 207502600 U CN207502600 U CN 207502600U CN 201721515856 U CN201721515856 U CN 201721515856U CN 207502600 U CN207502600 U CN 207502600U
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- resistance
- ground wire
- pin
- circuit
- relay
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Abstract
The utility model discloses the ground wire monitor that a kind of band is examined automatically, including MCU, warning circuit, insulating resistance measuring circuit, timer and storage circuit, it is characterized in that, the warning circuit, insulating resistance measuring circuit, timer and storage circuit are connect respectively with MCU.The beneficial effects of the utility model are, when ground wire monitor to the time that need to be calibrated, relay can be switched on reference resistance, system measures automatically, and the pre-stored values in the result of measurement and storage circuit EPPROM are compared, then relay automatically switches back into monitored object within a preset range, and then warning circuit warning reminding is not unqualified within a preset range, needs to calibrate.It is therefore not necessary to which each ground wire monitor manually goes to verify, the ground wire monitor of only automatic disqualified upon inspection just needs manually to go to calibrate, greatly saves manpower.
Description
Technical field
The utility model is related to the ground wire monitors that ground wire monitoring field more particularly to a kind of band are examined automatically.
Background technology
Some scenes higher to grounding requirement in production operation, can all use some ground wire monitors, such as：Platform
Pad ground wire monitor, equipment ground wire monitor.When testing at the scene to ground wire monitor at present, it is required for manually quilt
Monitored object removes, then connects measuring resistance and test, and it is qualified to examine, then monitored object is taken back；If do not conform to
Lattice, then calibrated.Such Comparision is cumbersome, time-consuming and laborious.
Utility model content
For it is existing the problem of, the utility model provides the ground wire monitor that a kind of band is examined automatically, and the utility model is straight
It connects and reference resistance is arranged on ground wire monitor, then pass through program and the monitored object of relay switching and reference resistance.
When needing to test to ground wire monitor, relay is switched on reference resistance, the voltage at circuit measuring reference resistance both ends,
Pre-stored values in measured value and storage circuit EPPROM are compared by MCU, and then relay is automatic within a preset range for measured value
Monitored object is switched back into, continues to monitor；Not within a preset range, warning circuit warning reminding ground wire monitor does not conform to measured value
Lattice need manual calibration.
The ground wire monitor that a kind of band is examined automatically, including MCU, warning circuit, insulating resistance measuring circuit, timer and
Storage circuit, which is characterized in that warning circuit, insulating resistance measuring circuit, timer and the storage circuit respectively with MCU
Connection, the C-terminal of the insulating resistance measuring circuit are connect with resistance Ref, RX1 and ground wire GND, the resistance Ref other ends
The K1C feet of relay K1, the other end connection of resistance RX1 and the K1B feet of monitoring line leading point A and relay K1 are connected to, after
The K1D feet of electric appliance K1 are connected to D1 and+5V power supplys, another pin 3 for being terminated at triode Q1 of D1, and the K1E feet of relay K1 connect
In the pin 3 of triode Q1, the pin 1 of triode Q1 is connected to the I/O pin of MCU, and the pin 2 of triode Q1 is connected to ground wire
The K1A feet of GND, relay K1 are connected to resistance R1 and the resistance R2 at insulating resistance measuring circuit B ends, and the other end of resistance R1 connects
It is connected to+5V power supplys.
Preferably, the insulating resistance measuring circuit includes U1, and the pin 3 of U1 is connected to resistance R2 and C1, resistance R2
The other end be connected to the K1A feet of relay K1 and resistance R1, the other end of capacitance C1 is connected to resistance Ref, RX1 and ground wire
GND, resistance R4, U1 pin 2 be connected to resistance R3 and resistance R4, the other end of resistance R3 is connected to the pin 1 of U1, U1's
Pin 1 is also attached to the ADC pins of MCU, and the pin 8 that the pin 4 of U1 is connected to ground wire GND, U1 is connected to+5V power supplys.
Preferably, the MCU uses LPC2103, U1 to use AD8628.
Preferably, resistance Ref is that preset measuring resistance is known as reference resistance.
The beneficial effects of the utility model are that ground wire monitor manually goes to verify without each, and relay is switched to
On reference resistance, the voltage at circuit measuring reference resistance both ends, MCU by the pre-stored values in measured value and storage circuit EPPROM into
Row compares, and then relay automatically switches back into monitored object to measured value within a preset range, continues to monitor；Measured value is not default
In the range of, warning circuit warning reminding ground wire monitor is unqualified, needs manual calibration；Only circuit is underproof after examining automatically
Ground wire monitor just needs manually to go to calibrate, greatly saves manpower.
Description of the drawings
Fig. 1 is the utility model principle frame diagram.
Fig. 2 is the electric operation control circuit figure that the utility model insulating resistance measuring circuit is connected to reference resistance Ref.
Fig. 3 is the utility model insulating resistance measuring circuit diagram.
Specific embodiment
The utility model is described further below in conjunction with the accompanying drawings.
As shown in Figs. 1-3, the ground wire monitor that a kind of band is examined automatically, including MCU, warning circuit, insulating resistance measuring
Circuit, timer and storage circuit, which is characterized in that warning circuit, insulating resistance measuring circuit, timer and the storage
Circuit is connect respectively with MCU, and the C-terminal of the insulating resistance measuring circuit is connect with resistance Ref, RX1 and ground wire GND, described
The resistance Ref other ends are connected to the K1C feet of relay K1, other end connection and monitoring line leading point A and the relay of resistance RX1
The K1B feet of K1, the K1D feet of relay K1 are connected to D1 and+5V power supplys, another pin 3 for being terminated at triode Q1 of D1, K1's
K1E feet are connected to the pin 3 of triode Q1, and the pin 1 of triode Q1 is connected to the I/O pin of MCU, and the pin 2 of triode Q1 connects
In ground wire GND, the K1A feet of relay K1 are connected to resistance R1 and the resistance R2 at insulating resistance measuring circuit B ends, and resistance R1's is another
One end is connected to+5V power supplys.
Preferably, the insulating resistance measuring circuit includes U1, and the pin 3 of U1 is connected to resistance R2 and C1, resistance R2
The other end be connected to the K1A feet of relay K1 and resistance R1, the other end of capacitance C1 is connected to resistance Ref, RX1 and ground wire
GND, resistance R4, U1 pin 2 be connected to resistance R3 and resistance R4, the other end of resistance R3 is connected to the pin 1 of U1, U1's
Pin 1 is also attached to the ADC pins of MCU, and the pin 8 that the pin 4 of U1 is connected to ground wire GND, U1 is connected to+5V power supplys.
Preferably, the MCU uses LPC2103, U1 to use AD8628.
Preferably, resistance Ref is that preset measuring resistance is known as reference resistance.
Operation principle：Reference resistance Ref is directly arranged on ground wire monitor by the utility model, passes through cutting for relay
The voltage for changing detection reference resistance Ref is detected ground wire monitor formedness.
When ground wire monitor needs self to detect, MCU transmits control signals to triode Q1, triode Q1 drivings after
The K1A of electric appliance K1 gets to K1C, the voltage at reference resistance Ref both ends, and the ADC of MCU is transferred to after U1 amplifies, and MCU is calculated
After measured value, the parameter preset with having in storage circuit EPPROM is compared, if measured value is in preset error range
It is interior, then it represents that ground wire monitor is normal, and the K1A of MCU control relay K1 switches gets to K1B, continues to monitor；If measured value is not
In preset error range, MCU driving warning circuit work, warning circuit can send out warning, and ground wire monitor is unqualified.
The beneficial effects of the utility model are that ground wire monitor manually goes to verify without each, and relay is switched to
On reference resistance, the voltage at circuit measuring reference resistance both ends, MCU by the pre-stored values in measured value and storage circuit EPPROM into
Row compares, and then relay automatically switches back into monitored object to measured value within a preset range, continues to monitor；Measured value is not default
In the range of, warning circuit warning reminding ground wire monitor is unqualified, needs manual calibration；Only circuit is underproof after examining automatically
Ground wire monitor just needs manually to go to calibrate, greatly saves manpower.
The effect of timer is periodically to transmit on the signal to MCU that need to be detected, and makes MCU timing driving relays K1's
K1A gets to K1C, and detection is timed to ground wire monitor.
For warning circuit, timer and storage circuit to be connect with MCU in the utility model, MCU controls warning circuit,
Timer and storage circuit are the prior art, and be not the main innovation point of the utility model, therefore are not described in detail.
Embodiment of above is merely to illustrate the utility model, and is not limitation of the utility model, related technology neck
The those of ordinary skill in domain, in the case where not departing from the spirit and scope of the utility model, can also make a variety of changes and
Modification, therefore all equivalent technical solutions also belong to the scope of the utility model, the scope of patent protection of the utility model should
It is defined by the claims.
Claims (3)
1. the ground wire monitor that a kind of band is examined automatically including MCU, warning circuit, insulating resistance measuring circuit, timer and is deposited
Storing up electricity road, which is characterized in that warning circuit, insulating resistance measuring circuit, timer and the storage circuit connects respectively with MCU
It connects, the C-terminal of the insulating resistance measuring circuit is connect with resistance Ref, RX1 and ground wire GND, and the resistance Ref other ends connect
It is connected to the K1C feet of relay K1, the other end connection of resistance RX1 and the K1B feet of monitoring line leading point A and relay K1, relay
The K1D feet of device K1 are connected to D1 and+5V power supplys, another pin 3 for being terminated at triode Q1 of D1, and the K1E feet of relay K1 are connected to
The pin 3 of triode Q1, the pin 1 of triode Q1 are connected to the I/O pin of MCU, and the pin 2 of triode Q1 is connected to ground wire
The K1A feet of GND, relay K1 are connected to resistance R1 and the resistance R2 at insulating resistance measuring circuit B ends, and the other end of resistance R1 connects
It is connected to+5V power supplys.
2. the ground wire monitor that a kind of band according to claim 1 is examined automatically, which is characterized in that the ground resistance
Detection circuit includes U1, and the pin 3 of U1 is connected to resistance R2 and C1, and the other end of resistance R2 is connected to the K1A feet of relay K1
With resistance R1, the other end of capacitance C1 is connected to resistance Ref, RX1 and ground wire GND, the pin 2 of resistance R4, U1 are connected to resistance
The other end of R3 and resistance R4, resistance R3 are connected to the pin 1 of U1, and the pin 1 of U1 is also attached to the ADC pins of MCU, U1's
The pin 8 that pin 4 is connected to ground wire GND, U1 is connected to+5V power supplys.
3. the ground wire monitor that a kind of band according to claim 1 is examined automatically, which is characterized in that the MCU is used
LPC2103, U1 use AD8628.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721515856.8U CN207502600U (en) | 2017-11-14 | 2017-11-14 | The ground wire monitor that a kind of band is examined automatically |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721515856.8U CN207502600U (en) | 2017-11-14 | 2017-11-14 | The ground wire monitor that a kind of band is examined automatically |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207502600U true CN207502600U (en) | 2018-06-15 |
Family
ID=62504943
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721515856.8U Active CN207502600U (en) | 2017-11-14 | 2017-11-14 | The ground wire monitor that a kind of band is examined automatically |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207502600U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021043041A1 (en) * | 2019-09-04 | 2021-03-11 | 上海乐研电气有限公司 | Contact signal acquisition circuit for on-site on-line check of gas density relay |
| CN117409554A (en) * | 2023-12-12 | 2024-01-16 | 深圳市研成工业技术有限公司 | Alarm monitoring system based on tri-color lamp |
-
2017
- 2017-11-14 CN CN201721515856.8U patent/CN207502600U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021043041A1 (en) * | 2019-09-04 | 2021-03-11 | 上海乐研电气有限公司 | Contact signal acquisition circuit for on-site on-line check of gas density relay |
| CN117409554A (en) * | 2023-12-12 | 2024-01-16 | 深圳市研成工业技术有限公司 | Alarm monitoring system based on tri-color lamp |
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