CN220105254U - Ground electronic unit cable detection circuit - Google Patents
Ground electronic unit cable detection circuit Download PDFInfo
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- CN220105254U CN220105254U CN202320650231.1U CN202320650231U CN220105254U CN 220105254 U CN220105254 U CN 220105254U CN 202320650231 U CN202320650231 U CN 202320650231U CN 220105254 U CN220105254 U CN 220105254U
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Abstract
The utility model discloses a ground electronic unit cable detection circuit, which comprises: the output end of the comparison circuit is connected with the input end of the driving circuit, the comparison circuit is used for receiving the acquisition voltage and the reference voltage, obtaining a cable state according to the acquisition voltage and the reference voltage and transmitting the cable state to the driving circuit, and the driving circuit is used for receiving the cable state and controlling the voltage output of the output end C1_P and the output end C6_P according to the cable state. The utility model has the beneficial effects that: the circuit of the comparison circuit is simple in arrangement, no other circuit boards are needed, the daily maintenance is easy, and the implementation cost is low.
Description
Technical Field
The utility model relates to the technical field of circuit detection, in particular to a ground electronic unit cable detection circuit.
Background
The ground electronic unit is used as a message transceiver device necessary for the running mode of the rail transit IATP (automatic train protection system), is connected with the active transponder through a cable and transmits information such as forward route, temporary speed limit and the like to the train in real time. If the train running period does not receive the message information sent by the ground electronic unit, whether the cable of the ground electronic unit is in a short circuit or open circuit state is determined at the moment, so that the ground electronic unit is prevented from being damaged due to overlarge current. In the prior art, a cable detection mode generally adopts an impedance amplitude detection method, namely, an impedance amplitude change of a C6 (uplink serial port bias control interface) interface signal of an LEU (ground electronic unit) is measured to obtain a cable state of an active transponder, but the method needs to increase a circuit board of a detection device, and the detection cost is high.
Disclosure of Invention
The utility model overcomes the defect of short detection distance of the cable in the prior art, provides the cable detection circuit of the ground electronic unit, the input end of the comparison circuit is connected with the acquisition voltage end C1_D, the acquisition voltage can be directly acquired, meanwhile, the comparison circuit can generate the reference voltage, the detection function of whether the cable state is in an open state or a short circuit state is realized by comparing the acquisition voltage with the reference voltage, other circuit boards are not required to be added, the circuit is simple to set, the daily maintenance is easy, and the implementation cost is low.
In order to solve the technical problems, the technical scheme of the utility model is as follows:
the utility model provides a ground electronic unit cable detection circuit, comprising: the output end of the comparison circuit is connected with the input end of the driving circuit, the comparison circuit is used for receiving the acquisition voltage and the reference voltage, obtaining a cable state according to the acquisition voltage and the reference voltage and transmitting the cable state to the driving circuit, and the driving circuit is used for receiving the cable state and controlling the voltage output of the output end C1_P and the output end C6_P according to the cable state.
The input end of the comparison circuit is connected with the acquisition voltage end C1_D, the acquisition voltage can be directly acquired, meanwhile, the comparison circuit can generate the reference voltage, the detection function of whether the cable state is in an open circuit state or not and the detection function of the cable state are in a short circuit state or not are realized through comparison of the acquisition voltage and the reference voltage, other circuit boards are not required to be added, the circuit is simple to set, daily maintenance is easy, and the implementation cost is low.
Meanwhile, the use of the circuit board is reduced, namely, the investment of components is reduced, the fault risk is reduced, and the production cost is reduced.
Preferably, the comparison circuit includes: the reference voltage unit, the comparator UA and the comparator UB are connected in parallel, and the reference voltage unit is connected in series with the comparator UA and the comparator UB respectively.
Preferably, the reference voltage unit includes: resistor R29, resistor R37 and resistor R46 are connected in series in this order.
By setting the resistance values of the resistor R29, the resistor R37 and the resistor R46, the reference voltage can be adjusted according to actual conditions, so that the detection voltage range is adjustable, and the near-distance and far-distance cable state detection can be simultaneously satisfied.
Preferably, the positive electrode of the eighth pin power supply of the comparator UA is connected with the first power supply signal device, the negative electrode of the fourth pin power supply of the comparator UA is grounded, the second pin inverting input end of the comparator UA is connected with the second power supply signal device through a resistor R29, the second pin inverting input end of the comparator UA is grounded through a resistor R37 and a resistor R46 which are serially connected in turn, the non-inverting input end of the third pin of the comparator UA is connected with the acquisition voltage end C1_D, and the first pin output end of the comparator UA is connected with the short circuit signal end LS through a resistor R30.
Preferably, the positive electrode of the eighth pin power supply of the comparator UB and the negative electrode of the fourth pin power supply of the comparator UB are suspended, the inverting input end of the sixth pin of the comparator UB is connected with the acquisition voltage end C1_D, the non-inverting input end of the fifth pin of the comparator UB is grounded through a resistor R46, and the output end of the seventh pin of the comparator UB is connected with the open circuit signal end LO through a resistor R44.
Preferably, the driving circuit includes: the negative pole of diode D2 connects the first end of resistance R33, the second end of resistance R33 passes through electric capacity C44 and connects output C1_P, the first end of resistance R34 is still connected to the second end of resistance R33, the second end of resistance R34 passes through resistance R39 ground connection, the first pin base of triode Q7 is still connected to the second end of resistance R34, the second pin projecting pole ground connection of triode Q7, output C6_P is connected to triode Q7's third pin collecting electrode, triode Q7's third pin collecting electrode still passes through resistance R31 and connects triode Q6's first pin base, triode Q6's second pin projecting pole connects third power signal device, triode Q6's third pin collecting electrode passes through resistance R32 ground connection, triode Q6's third pin collecting electrode connects output C1_P.
When the cable is in a short circuit state, the high level output by the first pin output end of the comparator UA is transmitted to the driving circuit through the diode D2, so that the triode Q6 and the triode Q7 are in a conducting state, the output end C1_P is in the high level, and the output end C6_P is in the low level, thereby realizing the purpose of automatically cutting off the power supply of the follow-up circuit of the output end C1_P and the output end C6_P when the cable is in the short circuit state, improving the safety of the detection circuit and prolonging the service time of the detection circuit.
Preferably, the resistance value of the resistor R33 is 10kΩ, the resistance value of the resistor R34 is 100deg.kΩ, the resistance value of the resistor R39 is 100deg.kΩ, the resistance value of the resistor R31 is 10kΩ, and the resistance value of the resistor R32 is 4.64kΩ.
Preferably, the transistor Q6 is a PNP transistor, and the transistor Q7 is an NPN transistor.
Preferably, the capacitance of the capacitor C44 is 470nF.
The utility model has the beneficial effects that:
the input end of the comparison circuit is connected with the acquisition voltage end C1_D, the acquisition voltage can be directly acquired, meanwhile, the comparison circuit can generate the reference voltage, the detection function of whether the cable state is in an open circuit state or not and the detection function of the cable state are in a short circuit state or not are realized through comparison of the acquisition voltage and the reference voltage, other circuit boards are not required to be added, the circuit is simple to set, daily maintenance is easy, and the implementation cost is low.
Meanwhile, the use of the circuit board is reduced, namely, the investment of components is reduced, the fault risk is reduced, and the production cost is reduced.
Further, by setting the resistance values of the resistor R29, the resistor R37 and the resistor R46, the reference voltage can be adjusted according to actual conditions, so that the detection voltage range is adjustable, and the near-distance and far-distance cable state detection can be simultaneously satisfied.
Further, when the cable is in a short circuit state, the high level output by the first pin output end of the comparator UA is transmitted to the driving circuit through the diode D2, so that the triode Q6 and the triode Q7 are in a conducting state, the output end C1_P is in the high level, and the output end C6_P is in the low level, thereby realizing the purpose of automatically cutting off the power supply of the follow-up circuit of the output end C1_P and the output end C6_P when the cable is in the short circuit state, improving the safety of the detection circuit and prolonging the service time of the detection circuit.
Drawings
Other features, objects and advantages of the present utility model will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the figures.
Fig. 1 is a circuit diagram of a cable detection circuit of a ground electronic unit according to the present utility model.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in further detail with reference to the accompanying drawings and examples, it being understood that the detailed description herein is merely a preferred embodiment of the present utility model, which is intended to illustrate the present utility model, and not to limit the scope of the utility model, as all other embodiments obtained by those skilled in the art without making any inventive effort fall within the scope of the present utility model.
Before discussing the exemplary embodiments in more detail, it should be mentioned that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart depicts operations (or steps) as a sequential process, many of the operations (or steps) can be performed in parallel, concurrently, or at the same time. Furthermore, the order of the operations may be rearranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figures; the processes may correspond to methods, functions, procedures, subroutines, and the like.
In order that the utility model may be more readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings.
Examples: as shown in fig. 1, an embodiment of the present disclosure provides a ground electronic unit cable detection circuit, including: the output end of the comparison circuit is connected with the input end of the driving circuit, the comparison circuit is used for receiving the acquisition voltage and the reference voltage, obtaining a cable state according to the acquisition voltage and the reference voltage and transmitting the cable state to the driving circuit, and the driving circuit is used for receiving the cable state and controlling the voltage output of the output end C1_P and the output end C6_P according to the cable state.
In implementation, the input end of the comparison circuit is connected with the acquisition voltage end C1_D and is used for acquiring the acquisition voltage of the cable output signal, the comparison circuit comprises a reference voltage unit capable of generating a reference voltage, a comparator UA and a comparator UB, and when the acquisition voltage and the reference voltage respectively pass through the comparator UA and the comparator UB, the state of the acquisition voltage is acquired through the output of the comparator UA and the output of the comparator UB so as to obtain the cable state. Wherein, the cable state includes: normal state, open state, and short state.
The comparison circuit transmits the cable state to the driving circuit, and the driving circuit controls the voltage output of the output terminal C1_P and the output terminal C6_P according to the cable state.
The detection circuit comprises a reference voltage unit, a comparator UA and a comparator UB, namely, the detection function of whether the cable state is in an open circuit state and a short circuit state is realized through the comparison result of the reference voltage unit and the comparator UA and the comparator UB when the reference voltage and the reference voltage respectively pass through the comparator UA and the comparator UB.
The ground electronic unit cable detection circuit provided by the utility model has the advantages that the circuit arrangement is simple, the number of peripheral circuits is small, other circuit boards are not required to be added, and the ground electronic unit cable detection circuit is easy to maintain in daily life. Meanwhile, the use of the circuit board is reduced, namely, the investment of components is reduced, the fault risk is reduced, and the production cost is reduced.
In practice, as shown in fig. 1, the comparison circuit comprises: a reference voltage unit, a comparator UA and a comparator UB; the reference voltage unit includes: resistor R29, resistor R37 and resistor R46 are connected in series in this order. Specifically, the first end of the resistor R29 is connected to the second power signal device, the second end of the resistor R29 is connected to the first end of the resistor R37, the second end of the resistor R37 is connected to the first end of the resistor R46, and the second end of the resistor R46 is grounded. Preferably, the second power signal means is connected to a 5V power signal.
In implementation, as shown in fig. 1, the second end of the resistor R29 is further connected to the second pin inverting input end of the comparator UA, the eighth pin power anode of the comparator UA is connected to the first power signal device, the fourth pin power cathode of the comparator UA is grounded, the third pin non-inverting input end of the comparator UA is connected to the collection voltage end c1_d, and the first pin output end of the comparator UA is connected to the short circuit signal end LS through the resistor R30. Preferably, the first power signal means is connected to a 5V power signal.
In implementation, as shown in fig. 1, the second end of the resistor R37 is further connected to the non-inverting input end of the fifth pin of the comparator UB, the inverting input end of the sixth pin of the comparator UB is connected to the collection voltage end c1_d, the inverting input end of the sixth pin of the comparator UB is further connected to the non-inverting input end of the third pin of the comparator UA, the positive electrode of the eighth pin power supply of the comparator UB and the negative electrode of the fourth pin power supply of the comparator UB are suspended, and the output end of the seventh pin of the comparator UB is connected to the open circuit signal end LO through the resistor R44.
Preferably, the comparator UA and the comparator UB in the comparing circuit are both TS3702CD, and the comparator UA and the comparator UB are both set to output a high level if the non-inverting input voltage is greater than the inverting input voltage, and otherwise output a low level.
In a specific embodiment, the second power signal device is connected to a 5V power signal, and the second power signal device is connected to a second pin inverting input end of the comparator UA through the resistor R29, where the second pin inverting input end of the comparator UA receives the reference voltage divided by the resistor R29 and records the reference voltage as the first voltage value; the non-inverting input end of the third pin of the comparator UA is connected with the acquisition voltage end C1_D, and an acquisition voltage value is received;
when the acquired voltage value is larger than the first voltage value, the condition that the voltage of the non-inverting input end is larger than the voltage of the inverting input end is met, and a high level is output; when the first voltage value is larger than the acquisition voltage value, the voltage of the non-inverting input terminal is not satisfied and the low level is output.
In a specific embodiment, the second power supply signal device is connected to a 5V power supply signal, and the second power supply signal device is connected to the non-inverting input end of the fifth pin of the comparator UB through a resistor R29 and a resistor R37 connected in series, and the non-inverting input end of the fifth pin of the comparator UB receives a reference voltage divided by the resistor R29 and the resistor R37 connected in series and records the reference voltage as a second voltage value;
the inverting input end of the sixth pin of the comparator UB is connected with the acquisition voltage end C1_D and receives the acquisition voltage value;
when the second voltage value is larger than the acquisition voltage value, the condition that the voltage of the non-inverting input end is larger than the voltage of the inverting input end is met, and a high level is output.
When the acquired voltage value is larger than the second voltage value, the condition that the voltage of the non-inverting input end is larger than the voltage of the inverting input end is not satisfied, and a low level is output.
The first voltage value is larger than the second voltage value.
Preferably, the resistance of the resistor R29 is 121kΩ, the resistance of the resistor R30 is 100 Ω, the resistance of the resistor R37 is 1.78kΩ, the resistance of the resistor R44 is 100 Ω, and the resistance of the resistor R46 is 1kΩ.
It should be noted that, the reference voltage unit is a unit that generates the reference voltage and compares the reference voltage with the collected voltage, so the resistances of the resistor R29, the resistor R37 and the resistor R46 in the reference voltage unit may be set according to different requirements, which is not limited herein.
By setting the resistance values of the resistor R29, the resistor R37 and the resistor R46, the reference voltage can be adjusted according to actual conditions, so that the detection voltage range is adjustable, and the near-distance and far-distance cable state detection can be simultaneously satisfied.
The voltage in the cable is acquired by the acquisition voltage terminal C1_D to obtain the acquisition voltage, and the reference voltage is obtained by the reference voltage unit included in the comparison circuit through the reference voltage unit and the two comparators, so that when the reference voltage and the acquisition voltage are compared by the two-wire comparator, the voltage signal of the acquisition voltage can be monitored too much or too little.
Specifically, when the voltage signal is too large, the cable state is judged to be in a short circuit state, when the voltage signal is too small, the cable state is judged to be in an open circuit state, and when the voltage signal is normal, the cable state is judged to be in an open circuit state, namely, the collected voltage and the reference voltage are compared through the double-wire comparator, so that the monitoring function that the cable state is in the open circuit state or the short circuit state or the normal state is realized, and the cable state is fed back to the driving circuit through the comparison circuit.
The resistor R29, the resistor R37 and the resistor R46 are sequentially connected in series, the reference voltage is generated after the voltage of the second power supply signal device is divided, and the inverting input end of the second pin of the comparator UA and the non-inverting input end of the fifth pin of the comparator UB are both connected with a reference voltage unit, so that the comparator UA and the comparator UB can respectively receive the reference voltage; meanwhile, the non-inverting input end of the third pin of the comparator UA and the inverting input end of the sixth pin of the comparator UB are both connected with the acquisition voltage end C1_D, so that the comparator UA and the comparator UB can respectively receive the acquisition voltage.
In practice, as shown in fig. 1, the driving circuit comprises: the positive pole of diode D2 connects the first pin output of comparator UA, the first end of diode D2's negative pole connecting resistor R33, the first end of electric capacity C44 is connected to the second end of electric capacity R33, output C1_P is connected to the second end of electric capacity C44, the first end of electric resistance R34 is still connected to the second end of electric resistance R33, the first end of electric resistance R39 is connected to the second end of electric resistance R39 ground connection, the first pin base of triode Q7 is still connected to the second pin projecting pole ground connection of electric resistance R39, output C6_P is connected to triode Q7's third pin collecting electrode, triode Q7's third pin collecting electrode still connects triode Q6's first pin base through electric resistance R31, triode Q6's second pin projecting pole connects third power signal device, triode Q6's third pin collecting electrode ground connection through electric resistance R32, triode Q6's third pin connects output C1_P.
In practice, diode D2 satisfies the unidirectional current conduction, preventing current in the drive circuit from flowing backward to the compare circuit.
In implementation, the triode Q6 is PNP, the triode Q6 meets the condition that the base voltage is conducted at a low level, and otherwise, the triode Q6 is in an cut-off state; the triode Q7 is NPN type, the triode Q7 meets the condition that the base voltage is conducted in a high level mode, and otherwise, the triode Q7 is in an cut-off state.
Preferably, the third power supply signal means is connected to a 5V power supply signal.
Preferably, the resistance value of the resistor R33 is 10kΩ, the resistance value of the resistor R34 is 100deg.kΩ, the resistance value of the resistor R39 is 100deg.kΩ, the resistance value of the resistor R31 is 10kΩ, and the resistance value of the resistor R32 is 4.64kΩ.
Preferably, the capacitance value of the capacitor C44 is 470nF. And a capacitor C44 with a filtering function is additionally arranged between the comparison circuit and the output end C1_P, so that the anti-interference capability is improved.
In an implementation, when the driving circuit receives the cable state sent by the comparing circuit, the cable state is further processed, and specifically, the cable state includes: the specific judging conditions of the normal state, the open state and the short circuit state are as follows:
when the collection voltage is lower than the reference voltage received by the non-inverting input end of the fifth pin of the comparator UB, the collection voltage is also lower than the reference voltage received by the inverting input end of the second pin of the comparator UA, the output end of the seventh pin of the comparator UB outputs a high level, the output end of the first pin of the comparator UA outputs a low level, at this time, the open-circuit signal end LO represents a high level state, the short-circuit signal end LS represents a low level state, and the cable is judged to be in an open-circuit state. At this time, no current passes through the cable, and the driving circuit does not need to operate.
In implementation, when the sampling voltage is higher than the reference voltage received by the non-inverting input end of the fifth pin of the comparator UB and is lower than the reference voltage received by the inverting input end of the second pin of the comparator UA, the output end of the seventh pin of the comparator UB outputs a low level, and the output end of the first pin of the comparator UA outputs a low level, at this time, the open-circuit signal end LO represents a low level state, the short-circuit signal end LS represents a low level state, and it is determined that the cable is in a normal state.
In implementation, the low level output by the first pin output end of the comparator UA, the diode D2 is in a cut-off state, the first pin base of the triode Q7 receives the low level, and the triode Q7 is in a cut-off state;
in implementation, the emitter of the second pin of the triode Q6 is connected with the third power supply signal device, the emitter of the second pin of the triode Q6 transmits the received voltage signal from the third power supply signal device to the base of the first pin of the triode Q6, the base of the first pin of the triode Q6 receives the high-level voltage, and the triode Q6 is in a cut-off state;
when the triode Q6 is in a cut-off state, the emitter of the second pin of the triode Q6 and the collector of the third pin of the triode Q6 are not conducted, and the output end C1_P is grounded through a resistor R32, namely, the output end C1_P outputs a low level;
the first pin base of the transistor Q6 is connected to the output terminal c6_p through the resistor R31, i.e., the output terminal c6_p outputs a high level.
It should be noted that, based on the characteristics of the components of the transistor Q6, when the voltage value output by the third power signal device is output to the first pin base of the transistor Q6 through the second pin emitter of the transistor Q6, there is a voltage drop with respect to the voltage value output by the third power signal device, but the voltage drop through the transistor Q6 is relatively small, so that the first pin base of the transistor Q6 receives a high level.
In implementation, when the sampling voltage is higher than the reference voltage received by the inverting input end of the second pin of the comparator UA, the sampling voltage is higher than the reference voltage received by the non-inverting input end of the fifth pin of the comparator UB, the output end of the seventh pin of the comparator UB outputs a low level, and the output end of the first pin of the comparator UA outputs a high level, at this time, the open-circuit signal end LO represents a low level state, the short-circuit signal end LS represents a high level state, and the cable is judged to be in a short-circuit state.
In implementation, when the first pin output end of the comparator UA outputs a high level, the diode D2 is in a conducting state, the high level output by the first pin output end of the comparator UA is transmitted to the first pin base of the triode Q7 through the diode D2, the resistor R33 and the resistor R34 which are sequentially connected in series, the triode Q7 receives the high level and is in a conducting state, the third pin collector of the triode Q7 is conducted with the second pin emitter of the triode Q7, the second pin emitter of the triode Q7 is grounded, the third pin collector of the triode Q7 is also connected with the output end c6_p, that is, the output end c6_p is grounded through the second pin emitter of the triode Q7, and the output end c6_p outputs a low level;
in practice, the first pin base of the triode Q6 is connected to the first end of the resistor R31, and the second end of the resistor R31 is connected to the third pin collector of the triode Q7, that is, the first pin base of the triode Q6 receives a low level, and the triode Q6 is in a conductive state;
in practice, the emitter of the second pin of the transistor Q6 is connected to the third power supply signal device, the emitter of the second pin of the transistor Q6 transmits the received voltage signal to the collector of the third pin of the transistor Q6 and outputs the voltage signal to the output terminal c1_p, and the output terminal c1_p receives the high level output from the collector of the third pin of the transistor Q6, that is, the output terminal c1_p outputs the high level; in implementation, when the cable is in a short circuit state, the output end C1_P is in a high level, the output end C6_P is in a low level, and the master controller controls the protection circuit to automatically cut off the power supply of the follow-up circuits of the output end C1_P and the output end C6_P, so that the purpose of the protection circuit is realized.
The above embodiments are preferred embodiments of a ground electronic unit cable detection circuit according to the present utility model, and are not intended to limit the scope of the utility model, which includes but is not limited to the embodiments, and equivalent changes in shape and structure according to the utility model are all within the scope of the utility model.
Claims (9)
1. A ground electronics unit cable detection circuit, comprising: the output end of the comparison circuit is connected with the input end of the driving circuit, the comparison circuit is used for receiving the acquisition voltage and the reference voltage, obtaining a cable state according to the acquisition voltage and the reference voltage and transmitting the cable state to the driving circuit, and the driving circuit is used for receiving the cable state and controlling the voltage output of the output end C1_P and the output end C6_P according to the cable state.
2. The ground electronics unit cable detection circuit of claim 1, wherein the comparison circuit comprises: the reference voltage unit is connected in series with the comparator UA and the comparator UB respectively.
3. The ground electronics unit cable detection circuit of claim 2, wherein the reference voltage unit comprises: resistor R29, resistor R37 and resistor R46 are connected in series in this order.
4. A ground electronic unit cable detecting circuit according to claim 3, wherein a power supply anode of an eighth pin of said comparator UA is connected to a first power supply signal device, a power supply cathode of a fourth pin of said comparator UA is grounded, an inverting input end of a second pin of said comparator UA is connected to a second power supply signal device through a resistor R29, an inverting input end of a second pin of said comparator UA is further grounded through a resistor R37 and a resistor R46 which are serially connected in this way, a non-inverting input end of a third pin of said comparator UA is connected to a collection voltage terminal c1_d, and an output end of a first pin of said comparator UA is connected to a short circuit signal terminal LS through a resistor R30.
5. A ground electronic unit cable detecting circuit according to claim 3, wherein a positive electrode of a power supply at an eighth pin of said comparator UB and a negative electrode of a power supply at a fourth pin of said comparator UB are suspended, an inverting input terminal at a sixth pin of said comparator UB is connected to a collection voltage terminal c1_d, an inverting input terminal at a sixth pin of said comparator UB is further connected to a non-inverting input terminal at a third pin of said comparator UA, a non-inverting input terminal at a fifth pin of said comparator UB is grounded through a resistor R46, and an output terminal at a seventh pin of said comparator UB is connected to an open circuit signal terminal LO through a resistor R44.
6. The ground electronics unit cable detection circuit of claim 1, wherein the drive circuit comprises: the first end of resistance R33 is connected to the negative pole of diode D2, output C1_P is passed through to the second end of resistance R33, the first end of resistance R34 is still connected to the second end of resistance R33, and the second end of resistance R34 passes through resistance R39 ground connection, and triode Q7's first pin base is still connected to the second end of resistance R34, triode Q7's second pin projecting pole ground connection, triode Q7's third pin collecting electrode connection output C6_P, triode Q7's third pin collecting electrode still passes through resistance R31 and connects triode Q6's first pin base, triode Q6's second pin projecting pole connection third power signal device, triode Q6's third pin collecting electrode passes through resistance R32 ground connection, triode Q6's third pin collecting electrode connection output C1_P.
7. The ground electronic unit cable detection circuit of claim 6, wherein said resistor R33 has a resistance of 10kΩ, said resistor R34 has a resistance of 100deg.kΩ, said resistor R39 has a resistance of 100deg.kΩ, said resistor R31 has a resistance of 10kΩ, and said resistor R32 has a resistance of 4.64kΩ.
8. The ground electronics unit cable detection circuit of claim 6, wherein the transistor Q6 is a PNP transistor and the transistor Q7 is an NPN transistor.
9. The ground electronics unit cable detection circuit of claim 6, wherein the capacitance C44 has a capacitance value of 470nF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320650231.1U CN220105254U (en) | 2023-03-29 | 2023-03-29 | Ground electronic unit cable detection circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320650231.1U CN220105254U (en) | 2023-03-29 | 2023-03-29 | Ground electronic unit cable detection circuit |
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| CN220105254U true CN220105254U (en) | 2023-11-28 |
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| CN202320650231.1U Active CN220105254U (en) | 2023-03-29 | 2023-03-29 | Ground electronic unit cable detection circuit |
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| CN (1) | CN220105254U (en) |
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- 2023-03-29 CN CN202320650231.1U patent/CN220105254U/en active Active
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