CN110308361A - A kind of grounded inspection circuit and detection method of sewing device - Google Patents
A kind of grounded inspection circuit and detection method of sewing device Download PDFInfo
- Publication number
- CN110308361A CN110308361A CN201810232089.2A CN201810232089A CN110308361A CN 110308361 A CN110308361 A CN 110308361A CN 201810232089 A CN201810232089 A CN 201810232089A CN 110308361 A CN110308361 A CN 110308361A
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- resistance
- input terminal
- circuit
- optocoupler
- voltage
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
Abstract
The present invention relates to power circuit fields, more particularly to a kind of grounded inspection circuit and detection method of sewing device, it include: AC earth sample circuit, for acquiring the input voltage of optocoupler input, the first output voltage is generated, using first output voltage as the first input voltage of first comparator non-inverting input terminal；Signal processing circuit exports judging result for judging whether the first input voltage of the first comparator non-inverting input terminal is greater than the second input voltage of inverting input terminal；Warning note circuit, for generating alarm signal to alarm when the first input voltage is greater than the second input voltage；Alarm output circuit, for the judging result to be sent to the governor circuit of sewing device to carry out corresponding operation processing.It is an advantage of the current invention that being prompted and being alarmed in time, ensured sewing device and the safety of staff by the Grounding of detection sewing device.
Description
Technical field
The present invention relates to power circuit field more particularly to the grounded inspection circuits and detection method of a kind of sewing device.
Background technique
The reliable ground of sewing device is protected, and is the basic demand to sewing device and personal safety, when sewing device does not have
When having ground connection or imperfect earth, it is easy to happen electric shock accidents, while being easy to produce electrostatic when sewing some chemical fiber fabrics, if not having
There is ground protection, interference easily is generated to sewing device, causes device systems bad.
The earthing detection of general sewing device judged simply by artificial, but be a lack of permanently effective supervision with
Early warning, and sewing device often sews the case where there is imperfect earth in the process, once the discovery system of operator not in time
Only, it is likely that bring safety accident.
The patent of Publication No. CN107589338 discloses the grounded inspection circuit in a kind of continuous on line monitor table,
Including voltage detecting is electric between voltage detecting circuit, zero curve and ground wire between voltage detecting circuit, firewire and zero curve between firewire and ground wire
Road and relay control output circuit, voltage detecting electricity between voltage detecting circuit, firewire and zero curve between the firewire and ground wire
It is connect after voltage detecting circuit is parallel with one another between road, zero curve and ground wire with relay control output circuit, the relay control
Output circuit includes single-chip microcontroller or decoder, the relay switching variable being connected on single-chip microcontroller or decoder output output electricity
Road and buzzer alarm circuit, voltage detecting circuit, zero curve between voltage detecting circuit, firewire and zero curve between the firewire and ground wire
It is connect after voltage detecting circuit is parallel with one another between ground wire with the input terminal of single-chip microcontroller or decoder.The invention can detecte existing
Instrument whether normal ground, but circuit access is complicated, needs the incoming end of three detection circuits, also lacks signal processing electricity
The further operating on road is handled.
Summary of the invention
The technical problem to be solved in the present invention is designed to provide grounded inspection circuit and the detection side of a kind of sewing device
Method to solve the problems, such as that sewing device Earthing Reliability detects, and carries out early warning to Grounding, ensures equipment and person peace
Entirely.
To achieve the goals above, the technical solution adopted by the present invention are as follows:
A kind of grounded inspection circuit of sewing device, comprising:
AC earth sample circuit, for acquiring the input voltage of optocoupler input, the first output voltage of generation will be described
First input voltage of first output voltage as first comparator non-inverting input terminal；
Signal processing circuit, for judging whether the first input voltage of the first comparator non-inverting input terminal is greater than instead
Second input voltage of phase input terminal exports judging result；
Warning note circuit, for generating alarm signal to carry out when the first input voltage is greater than the second input voltage
Alarm；
Alarm output circuit, for the judging result to be sent to the governor circuit of sewing device to be grasped accordingly
It deals with.
Further, the AC earth sample circuit specifically includes ac input end L, P and ground connection input terminal PE；
The positive terminal of the ac input end L connection first diode, the negative pole end of the first diode and the first electricity
One end of resistance connects, the positive terminal of the second diode of the ac input end N connection, the negative pole end of second diode and the
One end of two resistance connects, the first resistor, second resistance the other end connect with the positive terminal of third diode, described the
One end of the negative pole end connection 3rd resistor of three diodes, the other end of the 3rd resistor is common end, is connected separately with the
The positive terminal of one end of four resistance, the negative pole end of the 4th diode and the optocoupler diode in optocoupler, the 4th resistance
The positive terminal of the other end and the 4th diode connects the ground connection input terminal PE, the ground connection input terminal PE and the optocoupler two
The negative pole end of pole pipe connects.
Further, optocoupler further includes optocoupler triode；
The base stage of the optocoupler triode and one end of first capacitor connect, and access between the base stage and electric first capacitor
To be powered, the other end of the first capacitor is grounded power supply, is connected between the base stage and collector of the optocoupler triode
There is the 5th resistance, the tie point of the 5th resistance and the optocoupler transistor collector is voltage output point, and output voltage is extremely
Signal processing circuit.
Further, the signal processing circuit specifically includes first comparator；
The non-inverting input terminal of the first comparator is connect with one end of the 6th resistance, the other end of the 6th resistance with
The collector of optocoupler triode connects；
The inverting input terminal of the first comparator is connect with one end of the 7th resistance, the 8th resistance, the 8th resistance
The other end ground connection, the 7th resistance the other end access power supply it is defeated with provide the inverting input terminal of first comparator second
Enter voltage.
Further, the 7th resistance, the resistance value of the 8th resistance are adjustable.
Further, the warning circuit specifically includes the first triode；
The base stage of first triode is connect with one end of the 9th resistance, the other end connection second of the 9th resistance
The output end of comparator, the emitter ground connection of first triode, connects between first transistor emitter and base stage
There are third capacitor, the tenth resistance, the third capacitor and the tenth resistor coupled in parallel, the collector of first triode connects driving
One end of buzzer, one end of the other end connection twelfth resistor of the driving buzzer, the other end of the second resistance
Power supply is accessed to be powered.
Further, the alarm output circuit specifically includes the second comparator；
One end of the non-inverting input terminal of second comparator and eleventh resistor connects, the eleventh resistor it is another
The output end of the second comparator of end connection, the inverting input terminal of second comparator are connect with the output end of the second comparator,
By the governor circuit of voltage output to sewing device.
Further, power supply power supply is carried out to signal processing circuit by way of isolation power supply.
Further, the optocoupler is exchange isolation optocoupler.
A kind of ground detecting method of sewing device, comprising steps of
S1: when being grounded input terminal PE ground connection, optocoupler input input voltage increases, and the first output voltage becomes smaller, and first
First input voltage of comparator non-inverting input terminal is less than the second input voltage of inverting input terminal voltage, and the first triode is cut
Only, driving buzzer does not work；
S2: when ground connection input terminal PE is not grounded, the input terminal input voltage of optocoupler is reduced, and the first output voltage becomes
Greatly, the first input voltage of first comparator non-inverting input terminal is greater than the second input voltage of inverting input terminal voltage, drives bee
The device that rings works, and issues alarm.
The present invention by detection sewing device Grounding, prompted and alarmed in time, ensured sewing device and
The safety of staff.
Detailed description of the invention
Fig. 1 is the schematic diagram of AC earth sample circuit provided by the invention；
Fig. 2 is a kind of ground detecting method of sewing device provided by the invention；
Fig. 3 is signal processing circuit schematic diagram provided by the invention；
Fig. 4 is warning note circuit diagram provided by the invention；
Fig. 5 is alarm output circuit schematic diagram provided by the invention；
Fig. 6 is the grounded inspection circuit schematic diagram of sewing device provided by the invention.
Specific embodiment
Following is a specific embodiment of the present invention in conjunction with the accompanying drawings, technical scheme of the present invention will be further described,
However, the present invention is not limited to these examples.
Embodiment one
The present invention provides a kind of grounded inspection circuit schematic diagrams of sewing device, as shown in Figure 1, comprising:
AC earth sample circuit, for acquiring the input voltage of optocoupler input, the first output voltage of generation will be described
First input voltage of first output voltage as first comparator U2A non-inverting input terminal；
Whether signal processing circuit, the first input voltage for judging the first comparator U2A non-inverting input terminal are big
In the second input voltage of inverting input terminal, judging result is exported；
Warning note circuit, for generating alarm signal to carry out when the first input voltage is greater than the second input voltage
Alarm；
Alarm output circuit, for the judging result to be sent to the governor circuit of sewing device to be grasped accordingly
It deals with.
Specifically,
AC earth is using in circuit, and ground connection input terminal PE is unearthed or imperfect earth, then the input voltage of optocoupler U1
Lower or without input, optocoupler diode does not generate optical signal, at this time output voltage V1 higher, when being grounded input terminal PE ground connection,
With above situation on the contrary, output voltage V1 is lower, output voltage V1 will be as first comparator U2A in signal processing electric current
First input voltage of non-inverting input terminal.
In signal processing circuit, the second input voltage of first comparator U2A inverting input terminal can be according to the 7th resistance
R7, the 8th resistance R8 are adjusted, and when being grounded input terminal PE unearthed or imperfect earth, it is defeated that output voltage V1 is greater than second
Enter voltage, it is high level signal that first comparator U2A, which exports vout1, and when being grounded input terminal PE ground connection, output voltage V1 will be small
In the second input voltage, first comparator U2A exports low level signal.
In warning note circuit, when the first triode Q1 receives the high level signal of first comparator U2A, it will lead
Logical, driving buzzer will work, and alarm to prompt sewing device unearthed or imperfect earth；First triode Q1 connects
When receiving the low level signal of first comparator U2A, it will cut-off, driving buzzer do not work.
In alarm output circuit, the governor circuit of sewing device recognizes sewing device when receiving high level signal
Current unearthed or imperfect earth, it will the control motor-driven output of sewing device closes sewing device and prompts to carry out
Ground connection checks.
According to the grounded inspection circuit of sewing device, the present invention also provides a kind of ground detecting method of sewing device,
As shown in Figure 2, comprising:
S1: when being grounded input terminal PE ground connection, optocoupler input input voltage increases, and the first output voltage becomes smaller, and first
First input voltage of comparator U2A non-inverting input terminal is less than the second input voltage of inverting input terminal voltage, the first triode
Cut-off, driving buzzer do not work；
S2: when ground connection input terminal PE is not grounded, the input terminal input voltage of optocoupler is reduced, and the first output voltage becomes
Greatly, the first input voltage of first comparator U2A non-inverting input terminal is greater than the second input voltage of inverting input terminal voltage, driving
Buzzer work, issues alarm.
Wherein, ground connection input terminal PE needs are corresponding with the ground terminal of sewing device connects, and optocoupler, which passes through alternating current, to carry out
Control, first comparator U2A are used to compare the input voltage of non-inverting input terminal and inverting input terminal, export vout1.
Fig. 3 is the schematic diagram of AC earth sample circuit provided by the invention, during use, by ac input end
L, corresponding L, N interface for being connected to sewing device of N, the ground terminal for being grounded input terminal PE and sewing device are correspondingly connected with, and are exchanged
First diode D1, first resistor R1 are connected behind input terminal L, connect the second diode behind resistance R1, ac input end N
D2, second resistance R2, wherein first resistor R1, second resistance R2 can be insurance resistance, when there is fault, such as
Short circuit can protect subsequent conditioning circuit and component.
First resistor R1, second resistance R2 finally link together, and connect with the positive terminal of third diode D3, the three or two
The negative pole end of pole pipe D3 is connect with one end of 3rd resistor R3, the optocoupler two inside the other end access optocoupler U1 of 3rd resistor R3
The negative pole end of pole pipe positive terminal, optocoupler diode is connect with ground connection input terminal PE, wherein in the outside of optocoupler U1, there are also the 4th electricity
Hinder R4, the 4th diode D4 respectively with optocoupler diodes in parallel.
Further, it is made of inside optocoupler U1 an optocoupler diode and optocoupler triode, the optocoupler in the present invention is
Isolation optocoupler is exchanged, can be controlled by alternating current, optocoupler diode is light emitting diode, when the LEDs ON
Afterwards, the base stage that optical signal is given to optocoupler triode is generated, base stage will generate electric current, so that the conversion of electrical-optical-electrical is realized,
Signal processing circuit is facilitated to carry out isolation power supply.
Wherein, the base stage of optocoupler U1 is also connected with power supply VCC1, is connected between the collector and power supply VCC1 of optocoupler U1
5th resistance R5, and pass through the tie point output voltage V1 of the 5th resistance R5 and collector, output voltage V1 will be used as signal
First input voltage of first comparator U2A non-inverting input terminal in processing circuit.
Specifically, when ground connection input terminal PE is no ground or imperfect earth causes ground resistance to become larger, optocoupler U1 is without defeated
Enter voltage or input voltage is lower, the output voltage V1 voltage value of optocoupler is higher at this time；When ground connection input terminal PE ground connection is good,
Generate input voltage and be input to optocoupler U1, at this point, the output voltage V1 voltage value of optocoupler is lower, by using output voltage V1 as
First input voltage of first comparator U2A non-inverting input terminal, the second input voltage with first comparator U2A inverting input terminal
It compares, the ground state of confirmation ground connection input terminal PE.
In the present invention, as shown in figure 4, first comparator U2A in signal processing circuit for compare non-inverting input terminal with
The voltage swing of inverting input terminal, first comparator U2A is according to comparison result input high level or low level vout1 to control
Alarm output circuit and warning circuit.
First comparator U2A non-inverting input terminal is connect by the 6th resistance R6 with the collector of optocoupler three-level light, is received defeated
Voltage V1 is as the first input voltage out；First comparator U2A inverting input terminal is connected with the 7th resistance R7, the 8th resistance R8
One end, the other end ground connection of the 8th resistance R8, the other end of the 7th resistance R7 connect another power supply VCC2, thus for the first ratio
Inverting input terminal compared with device U2A provides the second input voltage V2, can pass through the resistance value of the 7th resistance R7 of adjusting, the 8th resistance R8
To adjust the second input voltage V2, facilitates and the second different input voltage V2 is set in different situations with electric with the first input
Pressure V1 is compared.
First comparator U2A is powered by power supply VCC3, is powered by way of isolation, guarantees the peace of circuit
Quan Xing.Power supply VCC3 is also connected with the other end ground connection of the second capacitor C2, the second capacitor C2.
Fig. 5 is warning circuit schematic diagram provided by the invention, wherein as the vout1 of first comparator U2A output end output
When for high level, the first triode ON, it is unearthed or connect that driving buzzer LS1 will carry out warning note ground connection input terminal PE
Ground is bad；When the vout1 of first comparator U2A output end output is low level, the cut-off of the first triode drives buzzer
LS1 does not work.
Warning circuit further includes the 9th resistance R9, third capacitor C3, the tenth resistance R10, twelfth resistor R12, Yi Ji electricity
Source VCC4, wherein the tenth resistance R10 is in parallel with third capacitor C3, and be connected with the emitter of the first triode Q1 ground connection later.
Fig. 6 is alarm output circuit schematic diagram provided by the invention, wherein alarm output circuit can be with sewing device
Governor circuit connection, governor circuit receive the high level or low level of first comparator U2A output end output, if high electricity
It is flat, then it represents that ground connection input terminal PE and sewing device is unearthed or imperfect earth will control the motor driven of sewing device, with control
The working condition of sewing device processed.
Alarm output circuit includes the second comparator U2B, eleventh resistor R11, the non-inverting input terminal of the second comparator U2B
It being connect with one end of eleventh resistor R11, the other end of eleventh resistor R11 is connect with the output end of first comparator U2A, with
Receive the vout1 of first comparator U2A output.
The Grounding that sewing device is detected by way of carrying out isolation power supply to signal processing circuit, guarantees circuit
Safety has also ensured sewing device and the safety of staff.
Specific embodiment described herein is only an example for the spirit of the invention.The neck of technology belonging to the present invention
The technical staff in domain can make various modifications or additions to the described embodiments or replace by a similar method
In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.
Claims (10)
1. a kind of grounded inspection circuit of sewing device characterized by comprising
AC earth sample circuit generates the first output voltage, by described first for acquiring the input voltage of optocoupler input
First input voltage of the output voltage as first comparator non-inverting input terminal；
Signal processing circuit, for judging it is defeated whether the first input voltage of the first comparator non-inverting input terminal is greater than reverse phase
Enter second input voltage at end, exports judging result；
Warning note circuit, for generating alarm signal to alarm when the first input voltage is greater than the second input voltage；
Alarm output circuit, for the judging result to be sent to the governor circuit of sewing device to carry out at corresponding operation
Reason.
2. a kind of grounded inspection circuit of sewing device according to claim 1, which is characterized in that the AC earth is adopted
Sample circuit specifically includes ac input end L, P and ground connection input terminal PE；
The positive terminal of the ac input end L connection first diode, the negative pole end of the first diode and first resistor
One end connection, the positive terminal of the second diode of the ac input end N connection, the negative pole end of second diode and the second electricity
One end of resistance connects, the first resistor, second resistance the other end connect with the positive terminal of third diode, the described 3rd 2
One end of the negative pole end connection 3rd resistor of pole pipe, the other end of the 3rd resistor is common end, is connected separately with the 4th electricity
The positive terminal of one end of resistance, the negative pole end of the 4th diode and the optocoupler diode in optocoupler, the 4th resistance it is another
The positive terminal of end and the 4th diode connects the ground connection input terminal PE, the ground connection input terminal PE and the optocoupler diode
Negative pole end connection.
3. a kind of grounded inspection circuit of sewing device according to claim 2, which is characterized in that optocoupler further includes optocoupler
Triode；
The base stage of the optocoupler triode and one end of first capacitor connect, and access power supply between the base stage and electric first capacitor
To be powered, the other end of the first capacitor is grounded, and the is connected between the base stage and collector of the optocoupler triode
The tie point of five resistance, the 5th resistance and the optocoupler transistor collector is voltage output point, output voltage to signal
Processing circuit.
4. a kind of grounded inspection circuit of sewing device according to claim 1 or 3, which is characterized in that at the signal
Reason circuit specifically includes first comparator；
The non-inverting input terminal of the first comparator is connect with one end of the 6th resistance, the other end and optocoupler of the 6th resistance
The collector of triode connects；
The inverting input terminal of the first comparator is connect with one end of the 7th resistance, the 8th resistance, the 8th resistance it is another
One end ground connection, the other end access power supply of the 7th resistance is to provide the second input electricity of the inverting input terminal of first comparator
Pressure.
5. a kind of grounded inspection circuit of sewing device according to claim 4, which is characterized in that the 7th resistance,
The resistance value of 8th resistance is adjustable.
6. a kind of grounded inspection circuit of sewing device according to claim 1, which is characterized in that the warning circuit tool
Body includes the first triode；
The base stage of first triode is connect with one end of the 9th resistance, and the other end connection second of the 9th resistance is compared
The output end of device, the emitter ground connection of first triode, is connected with the between first transistor emitter and base stage
Three capacitors, the tenth resistance, the third capacitor and the tenth resistor coupled in parallel, the collector connection driving buzzing of first triode
One end of device, one end of the other end connection twelfth resistor of the driving buzzer, the other end access of the second resistance
Power supply is to be powered.
7. a kind of grounded inspection circuit of sewing device according to claim 1, which is characterized in that the warning output electricity
Road specifically includes the second comparator；
The non-inverting input terminal of second comparator and one end of eleventh resistor connect, and the other end of the eleventh resistor connects
The output end of the second comparator is connect, the inverting input terminal of second comparator is connect with the output end of the second comparator, will be electric
Pressure is exported to the governor circuit of sewing device.
8. a kind of grounded inspection circuit of sewing device according to claim 1, which is characterized in that pass through isolation power supply
Mode carries out power supply power supply to signal processing circuit.
9. a kind of grounded inspection circuit of sewing device according to claim 2 or 3, which is characterized in that the optocoupler is
Exchange isolation optocoupler.
10. a kind of ground detecting method of sewing device, which is characterized in that comprising steps of
S1: when being grounded input terminal PE ground connection, optocoupler input input voltage increases, and the first output voltage becomes smaller, and first compares
First input voltage of device non-inverting input terminal is less than the second input voltage of inverting input terminal voltage, and the cut-off of the first triode is driven
Dynamic buzzer does not work；
S2: when ground connection input terminal PE is not grounded, the input terminal input voltage of optocoupler is reduced, and the first output voltage becomes larger, the
First input voltage of one comparator non-inverting input terminal is greater than the second input voltage of inverting input terminal voltage, drives buzzer work
Make, issues alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810232089.2A CN110308361A (en) | 2018-03-20 | 2018-03-20 | A kind of grounded inspection circuit and detection method of sewing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810232089.2A CN110308361A (en) | 2018-03-20 | 2018-03-20 | A kind of grounded inspection circuit and detection method of sewing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110308361A true CN110308361A (en) | 2019-10-08 |
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ID=68073559
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810232089.2A Pending CN110308361A (en) | 2018-03-20 | 2018-03-20 | A kind of grounded inspection circuit and detection method of sewing device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203572906U (en) * | 2013-11-12 | 2014-04-30 | 阿里斯顿热能产品(中国)有限公司 | Grounding wire electrified detection device |
| CN105158625A (en) * | 2015-07-30 | 2015-12-16 | 青岛海尔科技有限公司 | Grounding detection device for household electrical appliance ground wire |
| CN206161762U (en) * | 2016-08-02 | 2017-05-10 | 浙江达峰科技有限公司 | Grounded inspection circuit |
| CN206697023U (en) * | 2017-05-15 | 2017-12-01 | 蚌埠依爱消防电子有限责任公司 | One kind is used for fire alarm control unit bus grounded inspection circuit |
| CN107589338A (en) * | 2017-10-12 | 2018-01-16 | 杭州春来科技有限公司 | Grounded inspection circuit and its detection method in continuous on line monitor table |
-
2018
- 2018-03-20 CN CN201810232089.2A patent/CN110308361A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203572906U (en) * | 2013-11-12 | 2014-04-30 | 阿里斯顿热能产品(中国)有限公司 | Grounding wire electrified detection device |
| CN105158625A (en) * | 2015-07-30 | 2015-12-16 | 青岛海尔科技有限公司 | Grounding detection device for household electrical appliance ground wire |
| CN206161762U (en) * | 2016-08-02 | 2017-05-10 | 浙江达峰科技有限公司 | Grounded inspection circuit |
| CN206697023U (en) * | 2017-05-15 | 2017-12-01 | 蚌埠依爱消防电子有限责任公司 | One kind is used for fire alarm control unit bus grounded inspection circuit |
| CN107589338A (en) * | 2017-10-12 | 2018-01-16 | 杭州春来科技有限公司 | Grounded inspection circuit and its detection method in continuous on line monitor table |
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Application publication date: 20191008 |