CN205982410U - A detection circuitry for rescuing winch contactless circuit overflows signal - Google Patents
A detection circuitry for rescuing winch contactless circuit overflows signal Download PDFInfo
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- CN205982410U CN205982410U CN201620813087.9U CN201620813087U CN205982410U CN 205982410 U CN205982410 U CN 205982410U CN 201620813087 U CN201620813087 U CN 201620813087U CN 205982410 U CN205982410 U CN 205982410U
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- wheatstone bridge
- contact type
- comparator
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Abstract
The utility model discloses a detection circuitry for rescuing winch contactless circuit overflows signal, including being used for the merge of collect motor electric current or looks line current to change adjustable digital level output's magnetic field signal acquisition circuit into, carry out magnetic field signal acquisition circuit's sampled signal the operational circuit that enlargies for the signal control circuit of transmission control signal, a comparison circuit for going on signal comparison, magnetic field signal acquisition circuit connects operational circuit and comparison circuit respectively, signal control circuit and operational circuit all connect comparison circuit, solving prior art detection electrical winch (especially rescuing electrical winch ) contactless circuit and overflowing the required of signal and a detection circuitry of design, the instantaneous heavy current that passes through of magnetic field signal acquisition circuit detection that the accessible was provided with the wheatstone bridge chip provides whether there is the condition emergence that overflows the signal flow and cross to safety operation for electrical winch provides safeguard.
Description
Technical field
This utility model is related to electronic technology field, specifically, is that one kind is used for rescuing winch non-contact type circuit mistake
The testing circuit of stream signal.
Background technology
In the brushless electric machine for electric winch, by being provided with, relevant parameter detection is carried out using non-contact type circuit
Circuit structure, and this kind of circuit structure is operationally, and situation that transient high-current flow through unavoidably occurs, and for the ease of
This kind of transient high-current is detected, detection non-contact type circuit over-current signal circuit actually electric winch safe operation it
Required.
Utility model content
The purpose of this utility model is to provide a kind of electricity of the detection for rescuing winch non-contact type circuit over-current signal
Road, solves prior art detection electric winch（Particularly rescue electric winch）Set needed for non-contact type circuit over-current signal
Meter a kind of testing circuit, can be provided by Wheatstone bridge chip field signal Acquisition Circuit detection instantaneously pass through big
Whether electric current is given has the situation that over-current signal flows through to occur, to provide safeguard for the safe operation of electric winch.
This utility model is achieved through the following technical solutions：A kind of for rescuing winch non-contact type circuit over-current signal
Testing circuit, including for gathering current of electric or/and phase line current and being converted into the magnetic field that adjustable digital level exports
Signal acquisition circuit；The discharge circuit that the sampled signal of field signal Acquisition Circuit is amplified, for transmission of control signals
Signal control circuit；For carrying out the comparison circuit that signal compares；Described field signal Acquisition Circuit connects amplifier electricity respectively
Road and comparison circuit, described signal control circuit and discharge circuit all connect comparison circuit.
For preferably realizing this utility model, further, it particularly is provided with following structures：Described field signal collection electricity
Road adopts Wheatstone bridge, and described Wheatstone bridge includes Wheatstone bridge chip U1, and described Wheatstone bridge chip U1's is same
Phase output terminal connects discharge circuit, and the out-phase output end of described Wheatstone bridge chip U1 connects comparison circuit.
For preferably realizing this utility model, further, it particularly is provided with following structures：Described Wheatstone bridge chip
U1 adopts AA004-02 chip.
For preferably realizing this utility model, further, it particularly is provided with following structures：Described discharge circuit includes transporting
Put integrated chip U2, potentiometer W, the in-phase output end of described Wheatstone bridge chip U1 connects the homophase of amplifier integrated chip U2
Input, the outfan of described amplifier integrated chip U2 connects comparison circuit by potentiometer W.
For preferably realizing this utility model, further, it particularly is provided with following structures：Described comparison circuit includes comparing
Compared with device U3, pull-up resistor R3, described potentiometer W connects the out-phase input of comparator U3, described Wheatstone bridge chip U1's
Out-phase output end connects the in-phase input end of comparator U3, and the outfan of described comparator U3 connects pull-up resistor R3.
For preferably realizing this utility model, further, it particularly is provided with following structures：Described comparator U3 adopts
LM319.
For preferably realizing this utility model, further, it particularly is provided with following structures：Described amplifier integrated chip U2
Using TLE2071 series integrated transporting discharging.
For preferably realizing this utility model, further, it particularly is provided with following structures：Described signal control circuit bag
Include resistance R2, described resistance R2 connects the out-phase input of comparator U3.
This utility model compared with prior art, has advantages below and beneficial effect：
This utility model solves prior art detection electric winch（Particularly rescue electric winch）Non-contact type circuit mistake
A kind of testing circuit designing needed for stream signal, can be provided by the field signal Acquisition Circuit of Wheatstone bridge chip
Detect that the high current instantaneously passed through provides the situation generation whether having over-current signal to flow through, so that the safe operation for electric winch
Provide safeguard.
This utility model can detect that the brushless electric machine electric current of rescue electric winch and/or phase line current whether there is instantaneously
The situation of excessively stream, and can after changing through discharge circuit and signal control circuit the size of the signal of superposition detect Bu Tong electric
The overcurrent condition of stream.
This utility model can complete to rescue the phase line current detection that the brshless DC motor PWM of electric winch controls, and solves
Brshless DC motor phase line current exist positive and negative detection require and detection speed response requirement, and for realizing brushless dc
The guarantee that circuit structure is provided by all current limlitings of machine.
This utility model is applied in the further conversion of existing equipment, and in the technological transformation of old equipment, shows non-
The superiority of contact type measurement；The electrical wiring of existing equipment just can record current signal measurement range without a bit change：
Electric current and the voltage of random waveform can be measured, such as direct current, exchange, pulse, triangular waveform etc., in addition to transient peak electric current,
Voltage signal also can verily be reflected.
This utility model have fast response time, overload capacity is strong, measurement range is big, small volume, lightweight, be easily installed
The features such as.
Brief description
Fig. 1 is theory diagram of the present utility model.
Fig. 2 is this utility model circuit theory diagrams.
Specific embodiment
With reference to embodiment, this utility model is described in further detail, but embodiment of the present utility model is not
It is limited to this.
Embodiment 1：
A kind of testing circuit for rescuing winch non-contact type circuit over-current signal, as shown in figure 1, include for gathering
Current of electric or/and phase line current are simultaneously converted into the field signal Acquisition Circuit of adjustable digital level output；Magnetic field is believed
The discharge circuit that the sampled signal of number Acquisition Circuit is amplified, for the signal control circuit of transmission of control signals；For entering
The comparison circuit that row signal compares；Described field signal Acquisition Circuit connects discharge circuit and comparison circuit, described signal respectively
Control circuit and discharge circuit all connect comparison circuit.
Field signal Acquisition Circuit gathers surrounding magnetic field signal magnitude by Wheatstone bridge principle, changes corresponding voltage
Difference output；Wherein in field signal Acquisition Circuit, the first via differential signal of output will be controlled by discharge circuit and with signal
The signal of circuit output is superimposed, obtains scalable and the superposed signal changing and be input to the defeated of comparison circuit after both superpositions
Enter end, the input signal of described signal control circuit is to obtain at signal input.And export in field signal Acquisition Circuit
The second road differential signal will be directly inputted in comparison circuit, in comparison circuit, by compare the second road differential signal and
Superposed signal can determine whether over-current signal.
When input one timing of field signal Acquisition Circuit, the input size changing superposed signal just can detect different electric currents
Overcurrent condition；When input one timing of field signal Acquisition Circuit, the input of superposed signal is also constant, adjusts amplifier electricity manually
Potentiometer size in road also can detect the overcurrent condition of different electric currents；Enable the overcurrent letter that circuit on-line checking is different
Number.
Solve prior art detection electric winch（Particularly rescue electric winch）The institute of non-contact type circuit over-current signal
A kind of testing circuit needing and designing, the field signal Acquisition Circuit detection that can be provided by Wheatstone bridge chip is instantaneously led to
Whether the high current crossed is given has the situation that over-current signal flows through to occur, to provide safeguard for the safe operation of electric winch.
Embodiment 2：
The present embodiment is to optimize further on the basis of above-described embodiment, for preferably realizing this utility model, enters one
Step, as shown in Figure 1 and Figure 2, it particularly is provided with following structures：Described field signal Acquisition Circuit adopts Wheatstone bridge, described
Wheatstone bridge includes Wheatstone bridge chip U1, the in-phase output end of described Wheatstone bridge chip U1（out+）Connect amplifier
Circuit, the out-phase output end of described Wheatstone bridge chip U1（out-）Connect comparison circuit.
Embodiment 3：
The present embodiment is to optimize further on the basis of above-described embodiment, for preferably realizing this utility model, enters one
Step, it particularly is provided with following structures：Described Wheatstone bridge chip U1 adopts AA004-02 chip.
Embodiment 4：
The present embodiment is to optimize further on the basis of embodiment 2 or 3, for preferably realizing this utility model, enters one
Step, as shown in Figure 1 and Figure 2, it particularly is provided with following structures：Described discharge circuit includes amplifier integrated chip U2, potentiometer W,
The in-phase output end of described Wheatstone bridge chip U1（out+）Connect the in-phase input end of amplifier integrated chip U2（in+）, institute
State the outfan of amplifier integrated chip U2（out）Comparison circuit is connected by potentiometer W.Described discharge circuit includes voltage follow
Device and potentiometer W, described voltage follower adopts amplifier integrated chip U2, the in-phase output end of described Wheatstone bridge chip U1
（out+）Connect the in-phase input end of amplifier integrated chip U2（in+）, the outfan of described amplifier integrated chip U2（out）Pass through
Potentiometer W connects comparison circuit.
Embodiment 5：
The present embodiment is to optimize further on the basis of embodiment 2-4 any embodiment, for preferably realizing this practicality
New, further, as shown in Figure 1 and Figure 2, it particularly is provided with following structures：Described comparison circuit includes comparator U3, pull-up
Resistance R3, described potentiometer W connects the out-phase input of comparator U3（in-）, the out-phase of described Wheatstone bridge chip U1 is defeated
Go out end（out-）Connect the in-phase input end of comparator U3（in+）, the outfan of described comparator U3（out）Connect pull-up resistor
R3.
Embodiment 6：
The present embodiment is to optimize further on the basis of embodiment 2-5 any embodiment, for preferably realizing this practicality
New, further, it particularly is provided with following structures：Described comparator U3 adopts LM319.
Embodiment 7：
The present embodiment is to optimize further on the basis of embodiment 2-6 any embodiment, for preferably realizing this practicality
New, further, it particularly is provided with following structures：Described amplifier integrated chip U2 adopts TLE2071 series integrated transporting discharging.
Embodiment 8：
The present embodiment is to optimize further on the basis of embodiment 2-7 any embodiment, for preferably realizing this practicality
New, further, as shown in Figure 1 and Figure 2, it particularly is provided with following structures：Described signal control circuit includes resistance R2, institute
State the out-phase input that resistance R2 connects comparator U3（in-）.
Wheatstone bridge chip AA004-02 gathers surrounding magnetic field signal magnitude, by the out+ of Wheatstone bridge chip U1
Foot and out- foot output difference voltage.The voltage difference of the out+ foot of Wheatstone bridge chip U1 and the output of out- foot and corresponding electricity
Stream size.The voltage follower that the out+ foot of Wheatstone bridge chip U1 passes through an integrated transporting discharging chip U2 composition increases output
Impedance is not so that affect the output of Wheatstone bridge chip U1 it is ensured that Wheatstone bridge chip when changing the input voltage of ILIMS
The accuracy of detection of U1.The in- foot voltage of comparator U3 is obtained by resistance R2 and potentiometer W partial pressure.Defeated using change ILIMS
Enter the input voltage of partial pressure resistance all in- feet of scalable comparator U3 of voltage and manual regulator potentiometer W, compare in change
The size of over-current signal to be detected can be changed in the case of the input voltage of in- foot of device U3.
A lot of new industries are gradually emerged with domestic, these new industries are required for the support of sensor no matter
It is in order at security consideration or market efficiency considers, current sensor will tend to more high efficient and reliable, in low-carbon environment-friendly
Under requirement, miniaturization is also following main trend.
The above, be only preferred embodiment of the present utility model, and not this utility model is done with any pro forma limit
System, every any simple modification above example made according to technical spirit of the present utility model, equivalent variations, each fall within
Within protection domain of the present utility model.
Claims (9)
1. a kind of testing circuit for rescuing winch non-contact type circuit over-current signal it is characterised in that：Including for gathering
Current of electric or/and phase line current are simultaneously converted into the field signal Acquisition Circuit of adjustable digital level output；Magnetic field is believed
The discharge circuit that the sampled signal of number Acquisition Circuit is amplified, for the signal control circuit of transmission of control signals；For entering
The comparison circuit that row signal compares；Described field signal Acquisition Circuit connects discharge circuit and comparison circuit, described signal respectively
Control circuit and discharge circuit all connect comparison circuit.
2. a kind of testing circuit for rescuing winch non-contact type circuit over-current signal according to claim 1, it is special
Levy and be：Described field signal Acquisition Circuit adopts Wheatstone bridge, and described Wheatstone bridge includes Wheatstone bridge chip U1,
The in-phase output end of described Wheatstone bridge chip U1 connects discharge circuit, the out-phase output end of described Wheatstone bridge chip U1
Connect comparison circuit.
3. a kind of testing circuit for rescuing winch non-contact type circuit over-current signal according to claim 2, it is special
Levy and be：Described Wheatstone bridge chip U1 adopts AA004-02 chip.
4. a kind of testing circuit for rescuing winch non-contact type circuit over-current signal according to Claims 2 or 3, its
It is characterised by：Described discharge circuit includes amplifier integrated chip U2, potentiometer W, and the homophase of described Wheatstone bridge chip U1 is defeated
Go out the in-phase input end that end connects amplifier integrated chip U2, the outfan of described amplifier integrated chip U2 is connected by potentiometer W
Comparison circuit.
5. a kind of testing circuit for rescuing winch non-contact type circuit over-current signal according to claim 4, it is special
Levy and be：Described comparison circuit includes comparator U3, pull-up resistor R3, and described potentiometer W connects the out-phase input of comparator U3
End, the out-phase output end of described Wheatstone bridge chip U1 connects the in-phase input end of comparator U3, and described comparator U3's is defeated
Go out end and connect pull-up resistor R3.
6. a kind of testing circuit for rescuing winch non-contact type circuit over-current signal according to claim 5, it is special
Levy and be：Described comparator U3 adopts LM319.
7. a kind of testing circuit for rescuing winch non-contact type circuit over-current signal according to claim 5 or 6, its
It is characterised by：Described amplifier integrated chip U2 adopts TLE2071 series integrated transporting discharging.
8. a kind of testing circuit for rescuing winch non-contact type circuit over-current signal according to claim 7, it is special
Levy and be：Described signal control circuit includes resistance R2, and described resistance R2 connects the out-phase input of comparator U3.
9. a kind of testing circuit for rescuing winch non-contact type circuit over-current signal according to claim 5 or 6, its
It is characterised by：Described signal control circuit includes resistance R2, and described resistance R2 connects the out-phase input of comparator U3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620813087.9U CN205982410U (en) | 2016-07-30 | 2016-07-30 | A detection circuitry for rescuing winch contactless circuit overflows signal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620813087.9U CN205982410U (en) | 2016-07-30 | 2016-07-30 | A detection circuitry for rescuing winch contactless circuit overflows signal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205982410U true CN205982410U (en) | 2017-02-22 |
Family
ID=58028080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620813087.9U Active CN205982410U (en) | 2016-07-30 | 2016-07-30 | A detection circuitry for rescuing winch contactless circuit overflows signal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205982410U (en) |
-
2016
- 2016-07-30 CN CN201620813087.9U patent/CN205982410U/en active Active
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