CN106066443B - A kind of sample circuit of safety ground detector and safety ground detector - Google Patents
A kind of sample circuit of safety ground detector and safety ground detector Download PDFInfo
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- CN106066443B CN106066443B CN201610403197.2A CN201610403197A CN106066443B CN 106066443 B CN106066443 B CN 106066443B CN 201610403197 A CN201610403197 A CN 201610403197A CN 106066443 B CN106066443 B CN 106066443B
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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 invention discloses a kind of sample circuit of safety ground detector and safety ground detectors, safety ground detector includes sample circuit, data processing circuit and power supply, and sample circuit includes first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the first capacitance, the second capacitance, third capacitance, the first diode, the second diode, third diode, the 4th diode, the 5th diode and the 6th diode；Advantage is that circuit structure is simple, first resistor, second resistance and the second capacitance carry out voltage division processing to the voltage of the firewire input terminal of collected Power Entry Module, 3rd resistor, the 4th resistance, the first capacitance and third capacitance carry out voltage division processing to the voltage of the voltage of the firewire input terminal of collected Power Entry Module and the zero curve input terminal of Power Entry Module, avoid the interference that common-mode voltage is brought, sampling circuit samples precision is higher, safety ground detector is simple in structure, and accuracy of detection is high.
Description
Technical field
The present invention relates to a kind of sample circuit, sample circuit and safety more particularly, to a kind of safety ground detector connect
Ground detector.
Background technology
Blood analyser is the more common inspection equipment of hospital laboratory, and existing blood analyser mainly includes power supply
Input circuit and blood analysis circuit, power supply input circuit have zero curve input terminal, firewire input terminal and ground wire input terminal.In work
When making, zero curve input terminal, firewire input terminal and the ground wire input terminal of power supply input circuit are connect with external commercial power socket, if blood
Liquid analyzer imperfect earth during the work time, it will cause the leakage protection circuit set in blood analysis circuit that can not release
High current, it is careless slightly that electric shock accidents may occur, so that cannot normally ensure the safety of user.
In order to improve the safety in utilization of blood analyser, at present mainly by setting a safety in blood analyser
Earth detector come detect blood analyser during the work time whether there is imperfect earth the problem of.Existing safety ground inspection
It surveys device and mainly includes sample circuit and data processing circuit, sample circuit includes sampling resistor, the first amplifying circuit and second is put
Big circuit, one end of sampling resistor are connected with the input terminal of the first amplifying circuit, the other end of sampling resistor and the second amplification electricity
The output terminal of the input terminal connection on road, the output terminal of the first amplifying circuit and the second amplifying circuit connects respectively with data processing circuit
It connects.When in use, one end of sampling resistor is connected with the ground wire input terminal of power supply input circuit in blood analyser, sampling resistor
The other end connected with the ground terminal of blood analysis circuit in blood analyser, collect blood respectively from there through sampling resistor
In analyzer in the voltage and blood analyser of the ground wire input terminal of power supply input circuit the ground terminal of blood analysis circuit electricity
Pressure, after the two sampled voltages are amplified respectively by the first amplifying circuit and the second amplifying circuit in input data processing circuit,
Data processing circuit is handled receiving two voltage signals, obtain blood analyser whether the conclusion of safety ground.
But the sample circuit of existing safety ground detector has the following problems：First, sample circuit is by sampling electricity
Resistance, the first amplifying circuit and the second amplifying circuit composition, structure are more complicated；2nd, power supply input circuit in blood analyser
Ground wire input terminal inevitably there are common-mode voltage, and the first amplifying circuit present in sample circuit and second amplification
Circuit is also readily incorporated common-mode voltage, thus will cause harmful effect to the sampling precision of sample circuit, and sampling precision is relatively low,
The accuracy of detection for eventually leading to safety ground detector is not high.
In view of this, it is related to that a kind of circuit structure is simple, the sample circuit of the high safety ground detector of sampling precision, and be based on
A kind of circuit structure of sample circuit design is simple, and the high safety ground detector of accuracy of detection is of great significance.
Invention content
The first technical problem to be solved by the present invention is to provide that a kind of circuit structure is simple, and the high safety of sampling precision connects
The sample circuit of ground detector.
Technical solution is used by the present invention solves one of above-mentioned technical problem：A kind of sampling of safety ground detector
Circuit, including first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the first capacitance, second
Capacitance, third capacitance, the first diode, the second diode, third diode, the 4th diode, the 5th diode and the six or two
Pole pipe；First diode and second diode are zener diode, the third diode, described the
Four diodes, the 5th diode and the 6th diode are halfwave rectifier diode；The first resistor
One end, described one end of the 5th resistance, the cathode of first diode, third diode cathode and the described the 5th
The cathode connection of diode and the first output terminal that its connecting pin is the sample circuit, the other end of the first resistor
It being connected with one end of the second resistance, the other end of the second resistance is connected with one end of second capacitance,
One end of first capacitance is connected with the other end of second capacitance and its connecting pin is the sample circuit
First input end, the first input end of the sample circuit is used to connect the firewire input terminal of power supply input circuit, described
The other end of 5th resistance, the anode of first diode, the anode of the third diode, the five or two pole
The anode of pipe, one end of the 6th resistance, the anode of second diode, the 4th diode anode and
The anode connection of 6th diode and the second input terminal that its connecting pin is the sample circuit, sampling electricity
Second input terminal on road is used to connecting the ground wire input terminal of power supply input circuit, the other end of the 6th resistance, described
The cathode of second diode, the cathode of the 4th diode, the cathode of the 6th diode and third electricity
One end connection of resistance and the second output terminal that its connecting pin is the sample circuit, the other end of the 3rd resistor and institute
One end connection for the 4th resistance stated, the other end of the 4th resistance, the other end of first capacitance and described
One end connection of third capacitance, the other end of the third capacitance is the third input terminal of the sample circuit, described
The third input terminal of sample circuit is used to connect the zero curve input terminal of power supply input circuit.
Compared with prior art, the advantage of the invention is that passing through first resistor, second resistance, 3rd resistor, the 4th electricity
Resistance, the 5th resistance, the 6th resistance, the first capacitance, the second capacitance, third capacitance, the first diode, the second diode, the three or two
Pole pipe, the 4th diode, the 5th diode and the 6th diode build sample circuit, and circuit structure is simple, first resistor,
Two resistance and the second capacitance form first RC divider, and 3rd resistor, the 4th resistance, the first capacitance and third capacitance are formed
Second RC divider, at work, the first input end of sample circuit directly acquire power input mould in blood analyser
The voltage of the firewire input terminal of block, the second input terminal of sample circuit directly acquire the ground of Power Entry Module in blood analyser
The voltage of line input terminal, the third input terminal of sample circuit directly acquire the zero curve input of Power Entry Module in blood analyser
The voltage at end, due in blood analyser between the zero curve input terminal of Power Entry Module and firewire input terminal and ground wire input terminal
Voltage difference it is larger, and first RC divider carries out the voltage of the firewire input terminal of collected Power Entry Module
It is exported again to data processing circuit after voltage division processing, second RC divider is defeated to the firewire of collected Power Entry Module
It is exported again to data after entering the voltage progress voltage division processing of the voltage at end and the zero curve input terminal of collected Power Entry Module
Processing circuit, it is possible thereby to which the interference that common-mode voltage is effectively avoided to bring, ensures that the sampling precision of sample circuit is higher.
The second technical problem to be solved by the present invention is to provide that a kind of circuit structure is simple, and the high safety of accuracy of detection connects
Ground detector.
Technical solution is used by the two of present invention solution above-mentioned technical problem：A kind of safety ground detector, including
Sample circuit, data processing circuit and power supply, the data processing circuit are connected with the power supply, the sample circuit
Including first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the first capacitance, the second capacitance,
Third capacitance, the first diode, the second diode, third diode, the 4th diode, the 5th diode and the 6th diode；
First diode and second diode are zener diode, the third diode, the described the 4th 2
Pole pipe, the 5th diode and the 6th diode are halfwave rectifier diode；One end of the first resistor,
One end of 5th resistance, the cathode of first diode, the cathode of third diode and the five or two pole
The cathode connection of pipe and the first output terminal that its connecting pin is the sample circuit, the other end of the first resistor and institute
One end connection for the second resistance stated, the other end of the second resistance is connected with one end of second capacitance, described
The first capacitance one end connected with the other end of second capacitance and its connecting pin be the sample circuit first
Input terminal, the first input end of the sample circuit are used to connect the firewire input terminal of power supply input circuit, and the described the 5th
The other end of resistance, the anode of first diode, the anode of the third diode, the 5th diode
Anode, one end of the 6th resistance, the anode of second diode, the anode of the 4th diode and described
The 6th diode anode connection and its connecting pin be the sample circuit the second input terminal, the sample circuit
Second input terminal is used to connect the ground wire input terminal of power supply input circuit, the other end of the 6th resistance, described second
The cathode of diode, the cathode of the 4th diode, the cathode of the 6th diode and the 3rd resistor
The second output terminal that one end connects and its connecting pin is the sample circuit, the other end of the 3rd resistor and described
One end connection of 4th resistance, the other end of the 4th resistance, the other end of first capacitance and the third
One end connection of capacitance, the other end of the third capacitance are the third input terminal of the sample circuit, the sampling
The third input terminal of circuit is used to connecting the zero curve input terminal of power supply input circuit, the first output terminal of the sample circuit and
The second output terminal of the sample circuit is connect respectively with the data processing circuit, and the first of the sample circuit is defeated
Outlet exports the first sampled signal, and the second output terminal of the sample circuit exports the second sampled signal, at the data
First sampled signal and second sampled signal are compared by reason circuit, if first sampled signal
More than second sampled signal, then show that the firewire input terminal of blood analyser and zero curve input terminal connect normally, ground wire
Input terminal fails normal ground, if first sampled signal is equal to second sampled signal, shows blood point
Firewire input terminal, zero curve input terminal and the ground wire input terminal of analyzer are all connected with normally.
The data processing circuit includes the first chip, the model IMP811LEUS- of model STM8L051F3P6
The second chip, the 7th resistance, the 8th resistance, the 9th resistance, crystal oscillator, the 4th capacitance, the 5th capacitance, the 6th capacitance and the 7th of T
Capacitance；17th foot of first chip is connected with the first output terminal of the sample circuit, first chip
16th foot is connected with the second output terminal of the sample circuit, the 4th foot and the 7th resistance of first chip
One end connection, the other end of the 7th resistance connects with the 2nd foot of second chip, first chip
5th foot, described one end of the 9th resistance, one end of the crystal oscillator are connected with one end of the 6th capacitance, described
One end of the other end of 6th capacitance and the 7th capacitance is grounded respectively, the other end of the 7th capacitance, described
The other end of crystal oscillator, the 9th resistance the other end connected with the 6th foot of first chip, first chip
The 7th foot, the 8th resistance one end connected with one end of the 5th capacitance, the other end of the 8th resistance
It is connected with one end of the 4th capacitance and its connecting pin is connect with the power supply, access 5V voltages, the described the 4th electricity
The other end of the other end of appearance and the 5th capacitance is grounded respectively, the 8th foot and described second of first chip
1st foot of chip is grounded respectively, and the 4th foot of second chip is connect with the power supply, accesses 5V voltages.
The safety ground detector further includes warning circuit, the input terminal of the warning circuit and the data
Processing circuit connects.In the structure, after data processing circuit obtains the conclusion that blood analyser is normal ground, data processing
Circuit output control signal driving alarm is alarmed, and operating personnel is allow to get alarm signal in time, avoid danger.
The warning circuit includes buzzer, the tenth resistance, the 11st resistance, the 12nd resistance, the 8th capacitance, the 7th
Diode and triode, the 7th diode are rectifier diode；One end of 12nd resistance and the electricity
Source connects, and accesses 5V voltages, and the other end of the 12nd resistance is connected with one end of the buzzer, the buzzing
The other end of device, the 7th diode cathode connected with the collector of the triode, the base of the triode
Pole, the 8th capacitance one end connected with one end of the tenth resistance, the other end of the tenth resistance and institute
The 11st resistance stated one end connection and its connecting pin be the warning circuit input terminal, the warning circuit it is defeated
Enter end to connect with the 20th foot of first chip, the other end of the 11st resistance, the 8th capacitance it is another
The anode of one end, the emitter of the triode and the 7th diode is grounded.In the structure, by buzzer,
Tenth resistance, the 11st resistance, the 12nd resistance, the 8th capacitance, the 7th diode and triode form audible alarm circuit, electricity
Line structure is fairly simple, and signaling rate is fast, can send out alarm at the first time.
The safety ground detector further includes display circuit, the display circuit respectively with the power supply and institute
The data processing circuit connection stated.In the structure, the test result of safety ground detector is shown by display circuit, user's
Intuitively observe test result.
Compared with prior art, it is the advantages of safety ground detector of the invention through sample circuit, data processing
Circuit and power supply structure safety ground detector, data processing circuit are connected with power supply, and sample circuit includes first resistor, second
Resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the first capacitance, the second capacitance, third capacitance, the one or two pole
Pipe, the second diode, third diode, the 4th diode, the 5th diode and the 6th diode, circuit structure is simple, and first
Resistance, second resistance and the second capacitance form first RC divider, 3rd resistor, the 4th resistance, the first capacitance and third
Capacitance forms second RC divider, and at work, the first input end of sample circuit directly acquires electricity in blood analyser
The voltage of the firewire input terminal of source input module, the second input terminal of sample circuit directly acquire power input in blood analyser
The voltage of the ground wire input terminal of module, the third input terminal of sample circuit directly acquire Power Entry Module in blood analyser
The voltage of zero curve input terminal, since the zero curve input terminal of Power Entry Module in blood analyser and firewire input terminal and ground wire are defeated
The voltage difference entered between end is larger, and first RC divider is to the firewire input terminal of collected Power Entry Module
Voltage is exported after carrying out voltage division processing by the first output terminal of sample circuit, and second RC divider is to collected power supply
The voltage of the voltage of the firewire input terminal of input module and the zero curve input terminal of collected Power Entry Module is carried out at partial pressure
It is exported after reason by the second output terminal of sample circuit, it is possible thereby to effectively avoid the interference that common-mode voltage is brought, ensures sampling
The sampling precision of circuit is higher, and the second output terminal of the first output terminal of sample circuit and sample circuit respectively at data
Circuit connection is managed, the first output terminal of sample circuit exports the first sampled signal, the second output terminal output second of sample circuit
First sampled signal and the second sampled signal are compared by sampled signal, data processing circuit, if the first sampled signal is big
In the second sampled signal, then show that the firewire input terminal of blood analyser and zero curve input terminal connect normally, ground wire input terminal is not
Energy normal ground if the first sampled signal is equal to the second sampled signal, shows firewire input terminal, the zero curve of blood analyser
Input terminal and ground wire input terminal are all connected with normally, being compared and obtaining from there through to the first sampled signal and the second sampled signal
Blood analyser whether the conclusion of normal ground, real-time is stronger, and safety ground detector circuit of the invention is simple in structure,
Accuracy of detection is high, and real-time.
Description of the drawings
Fig. 1 is the circuit diagram of the sample circuit of the safety ground detector of the present invention；
Fig. 2 is the functional block diagram of the safety ground detector of the present invention；
Fig. 3 is the circuit diagram of the data processing circuit of the safety ground detector of the present invention；
Fig. 4 is the circuit diagram of the warning circuit of the safety ground detector of the present invention.
Specific embodiment
The invention discloses a kind of sample circuit, below in conjunction with attached drawing embodiment to safety ground detector of the invention
Sample circuit is described in further detail.
Embodiment：As shown in Figure 1, a kind of sample circuit of safety ground detector, including first resistor R1, second resistance
R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the first capacitance C1, the second capacitance C2, third capacitance
C3, the first diode D1, the second diode D2, third diode D3, the 4th diode D4, the 5th diode D5 and the six or two pole
Pipe D6；First diode D1 and the second diode D2 is zener diode, third diode D3, the 4th diode D4, the five or two
Pole pipe D5 and the 6th diode D6 is halfwave rectifier diode；One end of first resistor R1, one end of the 5th resistance R5, the one or two
The cathode connection of the cathode of pole pipe D1, the cathode of third diode D3 and the 5th diode D5 and its connecting pin are sample circuit
The first output terminal, the other end of first resistor R1 connects with one end of second resistance R2, the other end of second resistance R2 and
One end connection of two capacitance C2, one end of the first capacitance C1 is connected with the other end of the second capacitance C2 and its connecting pin is sampling electricity
The first input end on road, the first input end of sample circuit are used to connect the firewire input terminal of power supply input circuit, the 5th resistance
The other end of R5, the anode of the first diode D1, the anode of third diode D3, the 5th diode D5 anode, the 6th resistance
One end of R6, the anode of the second diode D2, the anode of the 4th diode D4 and the 6th diode D6 anode connection and its connect
Second input terminal of the end for sample circuit is connect, the second input terminal of sample circuit is used to connect the ground wire input of power supply input circuit
End, the other end of the 6th resistance R6, the cathode of the second diode D2, the cathode of the 4th diode D4, the 6th diode D6 it is negative
Pole connected with one end of 3rd resistor R3 and its connecting pin be sample circuit second output terminal, the other end of 3rd resistor R3 and
One end connection of 4th resistance R4, one end of the other end of the 4th resistance R4, the other end of the first capacitance C1 and third capacitance C3
Connection, the other end of third capacitance C3 are the third input terminal of sample circuit, and the third input terminal of sample circuit is used to connect electricity
The zero curve input terminal of source input circuit.
The operation principle of sample circuit of the safety ground detector of the present invention is：First resistor R1, in sample circuit
Two resistance R2 and the second capacitance C2 form first RC divider, 3rd resistor R3, the 4th resistance R4, the first capacitance C1 and the
Three capacitance C3 form second RC divider.At work, the first input end of sample circuit directly acquires blood analyser
The voltage of the firewire input terminal of middle Power Entry Module, the second input terminal of sample circuit directly acquire power supply in blood analyser
The voltage of the ground wire input terminal of input module, the third input terminal of sample circuit directly acquire power input mould in blood analyser
The voltage of the zero curve input terminal of block, due to the zero curve input terminal of Power Entry Module in blood analyser and firewire input terminal and ground
Voltage difference between line input terminal is larger, and first RC divider inputs the firewire of collected Power Entry Module
The voltage at end is exported again after carrying out voltage division processing to data processing circuit, and second RC divider is to collected power input
After the voltage of the voltage of the firewire input terminal of module and the zero curve input terminal of collected Power Entry Module carries out voltage division processing
It exports again to data processing circuit, it is possible thereby to which the interference that common-mode voltage is effectively avoided to bring, ensures that the sampling of sample circuit is smart
Degree is higher.
The invention also discloses a kind of safety ground detector using above-mentioned sample circuit, below in conjunction with attached drawing embodiment
The safety ground detector of the present invention is described in further detail.
Embodiment one：As depicted in figs. 1 and 2, a kind of safety ground detector, including sample circuit, data processing circuit
And power supply, data processing circuit are connected with power supply, including first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance
R4, the 5th resistance R5, the 6th resistance R6, the first capacitance C1, the second capacitance C2, third capacitance C3, the first diode D1, the two or two
Pole pipe D2, third diode D3, the 4th diode D4, the 5th diode D5 and the 6th diode D6；First diode D1 and
Two diode D2 are that zener diode, third diode D3, the 4th diode D4, the 5th diode D5 and the 6th diode D6 are
Halfwave rectifier diode；One end of first resistor R1, one end of the 5th resistance R5, the cathode of the first diode D1, the three or two pole
The first output terminal that the cathode of the cathode of pipe D3 and the 5th diode D5 connect and its connecting pin is sample circuit, first resistor
The other end of R1 is connected with one end of second resistance R2, one end connection of the other end of second resistance R2 and the second capacitance C2, the
The first input end that one end of one capacitance C1 is connected with the other end of the second capacitance C2 and its connecting pin is sample circuit, sampling electricity
The first input end on road is used to connect the firewire input terminal of power supply input circuit, the other end, the first diode of the 5th resistance R5
The anode of D1, the anode of third diode D3, the anode of the 5th diode D5, one end of the 6th resistance R6, the second diode D2
Anode, the 4th diode D4 anode and the 6th diode D6 anode connection and its connecting pin be the second defeated of sample circuit
Entering end, the second input terminal of sample circuit is used to connect the ground wire input terminal of power supply input circuit, the other end of the 6th resistance R6,
The cathode of second diode D2, the cathode of the 4th diode D4, the cathode of the 6th diode D6 and 3rd resistor R3 one end connect
It connects and second output terminal that its connecting pin is sample circuit, one end connection of the other end of 3rd resistor R3 and the 4th resistance R4,
The other end of 4th resistance R4, the first capacitance C1 the other end connected with one end of third capacitance C3, third capacitance C3's is another
The third input terminal for sample circuit is held, the third input terminal of sample circuit is used to connect the zero curve input of power supply input circuit
End, the first output terminal of sample circuit and the second output terminal of sample circuit are connect respectively with data processing circuit, sample circuit
The first output terminal export the first sampled signal, the second output terminal of sample circuit exports the second sampled signal, data processing electricity
First sampled signal and the second sampled signal are compared by road, if the first sampled signal is more than the second sampled signal, table
The firewire input terminal of bright blood analyser connects normally with zero curve input terminal, and ground wire input terminal fails normal ground, if first
Sampled signal is equal to the second sampled signal, then shows the firewire input terminal, zero curve input terminal and ground wire input terminal of blood analyser
It is all connected with normal.
Embodiment two：As depicted in figs. 1 and 2, a kind of safety ground detector, including sample circuit, data processing circuit
And power supply, data processing circuit are connected with power supply, including first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance
R4, the 5th resistance R5, the 6th resistance R6, the first capacitance C1, the second capacitance C2, third capacitance C3, the first diode D1, the two or two
Pole pipe D2, third diode D3, the 4th diode D4, the 5th diode D5 and the 6th diode D6；First diode D1 and
Two diode D2 are that zener diode, third diode D3, the 4th diode D4, the 5th diode D5 and the 6th diode D6 are
Halfwave rectifier diode；One end of first resistor R1, one end of the 5th resistance R5, the cathode of the first diode D1, the three or two pole
The first output terminal that the cathode of the cathode of pipe D3 and the 5th diode D5 connect and its connecting pin is sample circuit, first resistor
The other end of R1 is connected with one end of second resistance R2, one end connection of the other end of second resistance R2 and the second capacitance C2, the
The first input end that one end of one capacitance C1 is connected with the other end of the second capacitance C2 and its connecting pin is sample circuit, sampling electricity
The first input end on road is used to connect the firewire input terminal of power supply input circuit, the other end, the first diode of the 5th resistance R5
The anode of D1, the anode of third diode D3, the anode of the 5th diode D5, one end of the 6th resistance R6, the second diode D2
Anode, the 4th diode D4 anode and the 6th diode D6 anode connection and its connecting pin be the second defeated of sample circuit
Entering end, the second input terminal of sample circuit is used to connect the ground wire input terminal of power supply input circuit, the other end of the 6th resistance R6,
The cathode of second diode D2, the cathode of the 4th diode D4, the cathode of the 6th diode D6 and 3rd resistor R3 one end connect
It connects and second output terminal that its connecting pin is sample circuit, one end connection of the other end of 3rd resistor R3 and the 4th resistance R4,
The other end of 4th resistance R4, the first capacitance C1 the other end connected with one end of third capacitance C3, third capacitance C3's is another
The third input terminal for sample circuit is held, the third input terminal of sample circuit is used to connect the zero curve input of power supply input circuit
End, the first output terminal of sample circuit and the second output terminal of sample circuit are connect respectively with data processing circuit, sample circuit
The first output terminal export the first sampled signal, the second output terminal of sample circuit exports the second sampled signal, data processing electricity
First sampled signal and the second sampled signal are compared by road, if the first sampled signal is more than the second sampled signal, table
The firewire input terminal of bright blood analyser connects normally with zero curve input terminal, and ground wire input terminal fails normal ground, if first
Sampled signal is equal to the second sampled signal, then shows the firewire input terminal, zero curve input terminal and ground wire input terminal of blood analyser
It is all connected with normal.
As shown in figure 3, in the present embodiment, first chip U1 of the data processing circuit including model STM8L051F3P6,
The second chip U2, the 7th resistance R7, the 8th resistance R8, the 9th resistance R9, crystal oscillator Y1, the 4th electricity of model IMP811LEUS-T
Hold C4, the 5th capacitance C5, the 6th capacitance C6 and the 7th capacitance C7；The 17th foot of first chip U1 and the first of sample circuit defeated
Outlet connects, and the 16th foot of the first chip U1 is connected with the second output terminal of sample circuit, the 4th foot and the 7th of the first chip U1
The 2nd foot connection of one end connection of resistance R7, the other end of the 7th resistance R7 and the second chip U2, the 5th foot of the first chip U1,
One end of 9th resistance R9, one end of crystal oscillator Y1 are connected with one end of the 6th capacitance C6, the other end and the 7th of the 6th capacitance C6
One end of capacitance C7 is grounded respectively, the other end of the 7th capacitance C7, the other end of crystal oscillator Y1, the other end of the 9th resistance R9 and
The 6th foot connection of one chip U1, one end of the 7th foot of the first chip U1, one end of the 8th resistance R8 and the 5th capacitance C5 connect
It connects, one end connection of the other end of the 8th resistance R8 and the 4th capacitance C4 and its connecting pin is connect with power supply, access 5V voltages, the
The other end of four capacitance C4 and the other end of the 5th capacitance C5 are grounded respectively, the 8th foot of the first chip U1 and the second chip U2's
1st foot is grounded respectively, and the 4th foot of the second chip U2 is connect with power supply, accesses 5V voltages.
Embodiment three：The present embodiment and embodiment two are essentially identical, differ only in the present embodiment, safety ground detection
Device further includes warning circuit, and the input terminal of warning circuit is connected with data processing circuit.
As shown in figure 4, warning circuit includes buzzer LS, the tenth resistance R10, the 11st resistance R11, the 12nd resistance
R12, the 8th capacitance C8, the 7th diode D7 and triode Q1, the 7th diode D7 are rectifier diode；12nd resistance R12
One end connect with power supply, access 5V voltages, the other end of the 12nd resistance R12 connects with one end of buzzer LS, buzzer
The other end of LS, the 7th diode D7 cathode connected with the collector of triode Q1, the base stage of triode Q1, the 8th capacitance C8
One end connected with one end of the tenth resistance R10, one end connection of the other end of the tenth resistance R10 and the 11st resistance R11 and
Its connecting pin is the input terminal of warning circuit, and the 20th foot connection of the input terminal of warning circuit and the first chip U1, the 11st is electric
The anode for hindering the other end of R11, the other end of the 8th capacitance C8, the emitter of triode Q1 and the 7th diode D7 is grounded.
Example IV:：The present embodiment and embodiment one are essentially identical, differ only in the present embodiment, safety ground inspection
It surveys device and further includes display circuit, display circuit is connect respectively with power supply and data processing circuit.
Embodiment five：The present embodiment and embodiment two are essentially identical, differ only in the present embodiment, safety ground detection
Device further includes display circuit, and display circuit is connect respectively with power supply and data processing circuit.
Claims (5)
1. a kind of safety ground detector, including sample circuit, data processing circuit and power supply, the data processing circuit and
The power supply connection, it is characterised in that the sample circuit includes first resistor, second resistance, 3rd resistor, the 4th electricity
Resistance, the 5th resistance, the 6th resistance, the first capacitance, the second capacitance, third capacitance, the first diode, the second diode, the three or two
Pole pipe, the 4th diode, the 5th diode and the 6th diode；First diode and second diode are steady
Press diode, the third diode, the 4th diode, the 5th diode and the 6th diode
For halfwave rectifier diode；One end of the first resistor, one end of the 5th resistance, first diode
Cathode, third diode cathode connected with the cathode of the 5th diode and the sample circuit is in its connecting pin
First output terminal, the other end of the first resistor are connected with one end of the second resistance, the second resistance
The other end is connected with one end of second capacitance, the other end of one end of first capacitance and second capacitance
Connection and the first input end that its connecting pin is the sample circuit, the first input end of the sample circuit are used to connect
The firewire input terminal of power supply input circuit, it is the other end of the 5th resistance, the anode of first diode, described
The anode of third diode, the anode of the 5th diode, one end of the 6th resistance, second diode
Anode, the 4th diode anode connected with the anode of the 6th diode and its connecting pin is adopted to be described
Second input terminal of sample circuit, the second input terminal of the sample circuit are used to connect the ground wire input of power supply input circuit
End, the other end of the 6th resistance, the cathode of second diode, the 4th diode cathode, described
The 6th diode cathode connected with one end of the 3rd resistor and its connecting pin be the sample circuit second
Output terminal, the other end of the 3rd resistor are connected with one end of the 4th resistance, the 4th resistance it is another
End, first capacitance the other end connected with one end of the third capacitance, the other end of the third capacitance is
The third input terminal of the sample circuit, the third input terminal of the sample circuit are used to connect the zero of power supply input circuit
Line input terminal, the first output terminal of the sample circuit and the second output terminal of the sample circuit respectively with the number
It being connected according to processing circuit, the first output terminal of the sample circuit exports the first sampled signal, and the of the sample circuit
Two output terminals export the second sampled signal, and the data processing circuit adopts first sampled signal and described second
Sample signal is compared, if first sampled signal is more than second sampled signal, shows blood analyser
Firewire input terminal connected with zero curve input terminal normally, ground wire input terminal fails normal ground, if described first sampling letter
Number it is equal to second sampled signal, then shows the firewire input terminal, zero curve input terminal and ground wire input terminal of blood analyser
It is all connected with normal.
2. a kind of safety ground detector according to claim 1, it is characterised in that the data processing circuit includes
The first chip of model STM8L051F3P6, the second chip of model IMP811LEUS-T, the 7th resistance, the 8th resistance,
9th resistance, crystal oscillator, the 4th capacitance, the 5th capacitance, the 6th capacitance and the 7th capacitance；
17th foot of first chip is connected with the first output terminal of the sample circuit, and the of first chip
16 feet are connected with the second output terminal of the sample circuit, the 4th foot of first chip and the 7th resistance
One end connects, and the other end of the 7th resistance connects with the 2nd foot of second chip, and the of first chip
5 feet, described one end of the 9th resistance, one end of the crystal oscillator are connected with one end of the 6th capacitance, and described
One end of the other end of six capacitances and the 7th capacitance is grounded respectively, the other end, the crystalline substance of the 7th capacitance
The other end, the other end of the 9th resistance to shake is connected with the 6th foot of first chip, first chip
7th foot, the 8th resistance one end connected with one end of the 5th capacitance, the other end of the 8th resistance and
One end of 4th capacitance connects and its connecting pin is connect with the power supply, accesses 5V voltages, the 4th capacitance
The other end and the other end of the 5th capacitance be grounded respectively, the 8th foot and second core of first chip
1st foot of piece is grounded respectively, and the 4th foot of second chip is connect with the power supply, accesses 5V voltages.
3. a kind of safety ground detector according to claim 2, it is characterised in that the safety ground detector is also
Including warning circuit, the input terminal of the warning circuit is connected with the data processing circuit.
4. a kind of safety ground detector according to claim 3, it is characterised in that the warning circuit includes buzzing
Device, the tenth resistance, the 11st resistance, the 12nd resistance, the 8th capacitance, the 7th diode and triode, the seven or two pole
It manages as rectifier diode；One end of 12nd resistance is connect with the power supply, access 5V voltages, and the described the 12nd
The other end of resistance is connected with one end of the buzzer, the other end of the buzzer, the 7th diode
Cathode is connected with the collector of the triode, the base stage of the triode, one end of the 8th capacitance and described
The tenth resistance one end connection, the other end of the tenth resistance connect with one end of the 11st resistance and its company
Meet the 20th foot company of input terminal of the end for the warning circuit, the input terminal of the warning circuit and first chip
It connects, the other end of the 11st resistance, the other end of the 8th capacitance, the emitter of the triode and described
The anode of the 7th diode be grounded.
5. a kind of safety ground detector according to claim 1, it is characterised in that the safety ground detector is also
Including display circuit, the display circuit is connect respectively with the power supply and the data processing circuit.
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| CN201610403197.2A CN106066443B (en) | 2016-06-07 | 2016-06-07 | A kind of sample circuit of safety ground detector and safety ground detector |
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| CN201610403197.2A CN106066443B (en) | 2016-06-07 | 2016-06-07 | A kind of sample circuit of safety ground detector and safety ground detector |
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| CN106066443A CN106066443A (en) | 2016-11-02 |
| CN106066443B true CN106066443B (en) | 2018-07-10 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106950453B (en) * | 2017-05-05 | 2023-09-12 | 南京信息工程大学 | Grounding safety protection detector |
| CN110095674A (en) * | 2018-01-29 | 2019-08-06 | 江苏万帮德和新能源科技股份有限公司 | A kind of grounded continuous detection circuit |
| CN110850332A (en) * | 2019-11-20 | 2020-02-28 | 深圳市奇辉电气有限公司 | Trend statistical type grounding body monitoring method and device |
| CN111474501B (en) * | 2020-05-29 | 2021-03-02 | 上海挚达科技发展有限公司 | Fill ground signal detection circuitry of electric pile |
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| US4884034A (en) * | 1989-01-03 | 1989-11-28 | Hermilo Guzman | Ground fault detector and locator |
| CN1987499A (en) * | 2006-11-23 | 2007-06-27 | 韩俊 | Signal producing circuit for detecting earthing state |
| CN101074974A (en) * | 2007-07-09 | 2007-11-21 | 虞宁生 | Grounded inspection circuit |
| CN103370630A (en) * | 2011-03-24 | 2013-10-23 | 东芝三菱电机产业系统株式会社 | Ground fault detection circuit |
| CN103472404A (en) * | 2012-06-06 | 2013-12-25 | 鸿富锦精密工业（深圳）有限公司 | Grounding detection circuit |
| CN205786945U (en) * | 2016-06-07 | 2016-12-07 | 浙江医药高等专科学校 | A kind of sample circuit of safety ground detector |
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2016
- 2016-06-07 CN CN201610403197.2A patent/CN106066443B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4884034A (en) * | 1989-01-03 | 1989-11-28 | Hermilo Guzman | Ground fault detector and locator |
| CN1987499A (en) * | 2006-11-23 | 2007-06-27 | 韩俊 | Signal producing circuit for detecting earthing state |
| CN101074974A (en) * | 2007-07-09 | 2007-11-21 | 虞宁生 | Grounded inspection circuit |
| CN103370630A (en) * | 2011-03-24 | 2013-10-23 | 东芝三菱电机产业系统株式会社 | Ground fault detection circuit |
| CN103472404A (en) * | 2012-06-06 | 2013-12-25 | 鸿富锦精密工业（深圳）有限公司 | Grounding detection circuit |
| CN205786945U (en) * | 2016-06-07 | 2016-12-07 | 浙江医药高等专科学校 | A kind of sample circuit of safety ground detector |
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