CN215180558U - Pressure sensor access detection circuit, device and electronic equipment - Google Patents
Pressure sensor access detection circuit, device and electronic equipment Download PDFInfo
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- CN215180558U CN215180558U CN202120649614.8U CN202120649614U CN215180558U CN 215180558 U CN215180558 U CN 215180558U CN 202120649614 U CN202120649614 U CN 202120649614U CN 215180558 U CN215180558 U CN 215180558U
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Abstract
The utility model relates to a pressure sensor technical field especially relates to a pressure sensor inserts detection circuitry, device and electronic equipment. The circuit comprises: the input end of the polarity switching module is connected with the power supply voltage end, the output end of the polarity switching module is connected with the interface, and the interface is used for being connected with the pressure sensor; and the polarity switching module is used for detecting whether the pressure sensor is accessed, switching the polarity according to the polarity of the pressure sensor when the pressure sensor is accessed, and outputting the power supply voltage to the pressure sensor according to the switching result. The utility model discloses a set up above-mentioned circuit for no matter pressure sensor is just connecing or the transposition, the circuit homoenergetic carries out the polarity switching that corresponds, switches on and for its power supply with pressure sensor polarity assorted route, need not to look over the positive and negative polarity of feeder ear in pressure sensor's installation, has saved the required installation time of pressure sensor, prevents that the transposition from leading to the device to burn out or damage.
Description
Technical Field
The utility model relates to a pressure sensor technical field especially relates to a pressure sensor inserts detection circuitry, device and electronic equipment.
Background
The pressure sensor is widely used for various equipment, part of the pressure sensors are arranged in the equipment, and the phenomenon that the pressure sensors are not installed in the equipment in a missing mode is caused in the assembling process of the equipment, so that the equipment breaks down in use, and the function of detecting whether internal devices are installed is lacked. On the other hand, the phenomenon of reverse connection of positive and negative pins also exists in the assembly process of the equipment, the pressure sensor is damaged when the equipment is serious, and a power supply circuit which can enable the device to be flexibly connected is lacked.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main aim at provides a pressure sensor inserts detection circuitry, device and electronic equipment, aims at solving the technical problem that pressure sensor can't install in a flexible way among the prior art.
In order to achieve the above object, the utility model provides a pressure sensor inserts detection circuitry, pressure sensor inserts detection circuitry includes: the input end of the polarity switching module is connected with a power supply voltage end, the output end of the polarity switching module is connected with the interface, and the interface is used for being connected with the pressure sensor;
the polarity switching module is used for detecting whether the pressure sensor is connected or not, switching the polarity according to the polarity of the pressure sensor when the pressure sensor is connected, and outputting power supply voltage to the pressure sensor according to the switching result.
Optionally, the circuit further includes an access detection module and a micro control unit, a detection end of the access detection module is connected with the polarity switching module, and an output end of the access detection module is connected with the micro control unit;
the access detection module is used for detecting the current state of the polarity switching module and outputting an access signal to the micro control unit when the current state is a power supply output state.
Optionally, the circuit further comprises a prompt module; the controlled end of the prompt module is connected with the control end of the micro control unit;
and the micro control unit is also used for sending an alarm control signal to the prompting module when the access signal output by the access detection module is not received, so that the prompting module gives an alarm according to the alarm control signal.
Optionally, the polarity switching module includes a first polarity power supply unit and a second polarity power supply unit; wherein the content of the first and second substances,
the output ends of the first polarity power supply unit and the second polarity power supply unit are both connected with the interface, the interface is used for being connected with the pressure sensor, and the input ends of the first polarity power supply unit and the second polarity power supply unit are both connected with the power supply voltage end;
the first polarity power supply unit is used for conducting when the polarity of the pressure sensor is matched with the first polarity, and outputting power supply voltage to the pressure sensor;
and the second polarity power supply unit is used for conducting when the polarity of the pressure sensor is matched with the second polarity, and outputting power supply voltage to the pressure sensor.
Optionally, the access detection module includes a first access detection unit and a second access detection unit, and the access signal includes a first access signal and a second access signal; wherein the content of the first and second substances,
the detection end of the first access detection unit is connected with one end of the first polarity power supply unit, and the output end of the first access detection unit is connected with one end of the micro control unit;
the first access detection unit is used for detecting the current state of the first polarity power supply unit and outputting a first access signal to the micro control unit when the current state is a power supply output state;
the detection end of the second access detection unit is connected with one end of the second polarity power supply unit, and the output end of the second access detection unit is connected with one end of the micro control unit;
and the second access detection unit is used for detecting the current state of the second polarity power supply unit and outputting a second access signal to the micro control unit when the current state is a power supply output state.
Optionally, the first polarity power supply unit includes a fourth resistor, a first diode, a sixth resistor, a third diode, and a second thyristor; the second polarity power supply unit comprises a seventh resistor, a fourth diode, a fifth resistor, a second diode and a first silicon controlled rectifier; wherein the content of the first and second substances,
the first end of the fourth resistor and the cathode of the first controllable silicon are connected with a power supply voltage end, the second end of the fourth resistor is connected with the anode of the first diode, the cathode of the first diode is connected with the anode of the first controllable silicon, and the cathode of the first diode is also connected with the second end of the sixth resistor and one end of the interface;
the first end of the sixth resistor is connected with the anode of the third diode, the cathode of the third diode is connected with the gate level of the second controllable silicon, the anode of the second controllable silicon is connected with one end of the interface, and the cathode of the second controllable silicon is connected with a power supply voltage end and the first end of the seventh resistor;
the second end of the seventh resistor is connected with the anode of the fourth diode, the cathode of the fourth diode is connected with the anode of the second controllable silicon, and the cathode of the fourth diode is also connected with the second end of the fifth resistor and one end of the interface;
and the first end of the fifth resistor is connected with the anode of the second diode, and the cathode of the second diode is connected with the gate level of the first controllable silicon.
Optionally, the first access detection unit includes a first resistor, a first triode, a second resistor, a second triode, and a third resistor; wherein the content of the first and second substances,
the first end of the first resistor is connected with a system power supply end, the second end of the first resistor is connected with one end of the micro control unit, the second end of the first resistor is also connected with a collector of the first triode, an emitter of the first triode is grounded, and a base of the first triode is connected with the first end of the second resistor;
the second end of the second resistor is connected with the collector of the second triode, the emitter of the second triode is connected with the first end of the fourth resistor, the base of the second triode is connected with the first end of the third resistor, and the second end of the third resistor is connected with the cathode of the first diode.
Optionally, the second access detection unit includes a tenth resistor, a third triode, a ninth resistor, a fourth triode, and an eighth resistor; wherein the content of the first and second substances,
a first end of the tenth resistor is connected with a system power supply end, a second end of the tenth resistor is connected with one end of the micro control unit, a second end of the tenth resistor is also connected with a collector of the third triode, an emitter of the third triode is grounded, and a base of the third triode is connected with a second end of the ninth resistor;
the first end of the ninth resistor is connected with the collector of the fourth triode, the emitter of the fourth triode is connected with the first end of the seventh resistor, the base of the fourth triode is connected with the first end of the eighth resistor, and the second end of the eighth resistor is connected with the cathode of the fourth diode.
Furthermore, in order to realize the above object, the utility model also provides a pressure sensor inserts detection device, pressure sensor inserts detection device contains as above pressure sensor inserts detection circuitry.
In addition, in order to achieve the above object, the present invention also provides an electronic device, which comprises the pressure sensor access detection circuit as described above.
The utility model discloses a set up a pressure sensor and insert detection circuitry, pressure sensor inserts detection circuitry includes: the input end of the polarity switching module is connected with a power supply voltage end, the output end of the polarity switching module is connected with the interface, and the interface is used for being connected with the pressure sensor; the polarity switching module is used for detecting whether the pressure sensor is connected or not, switching the polarity according to the polarity of the pressure sensor when the pressure sensor is connected, and outputting power supply voltage to the pressure sensor according to the switching result.
The utility model discloses a set up the supply circuit of changeable polarity for no matter pressure sensor is just connecing or the transposition, the circuit homoenergetic carries out the polarity switching that corresponds, switches on and for its power supply with pressure sensor polarity assorted route, need not to look over the positive and negative polarity of feeder ear in pressure sensor's installation, has saved the required installation time of pressure sensor, prevents that positive negative pole transposition from leading to the device to burn out or damage in the installation. Furthermore, an access detection module is further arranged, whether the pressure sensor is in a working state or not can be detected in time after the power is on, and the pressure sensor arranged in the equipment can be effectively prevented from being missed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of the pressure sensor access detection circuit of the present invention;
fig. 2 is another schematic structural diagram of an embodiment of the pressure sensor access detection circuit of the present invention;
fig. 3 is a schematic circuit diagram of an embodiment of the pressure sensor access detection circuit of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | Polarity switching module | MCU | |
| 200 | Access detection module | D1～D4 | First to |
| 201 | First access detection unit | Q1～Q4 | First to |
| 202 | Second access detection unit | R1～R10 | First to tenth resistors |
| P | Interface | S1～S2 | First to |
| 300 | Prompt module | GND | Ground connection |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, it should be considered that the combination of the technical solutions does not exist, and is not within the protection scope of the present invention.
It should be noted that, in the practical application of the present invention, the software program is inevitably applied to the software program, but the applicant states here that the software program applied in the embodiment of the present invention is the prior art, and in the present application, the modification and protection of the software program are not involved, but only the protection of the hardware architecture designed for the purpose of the invention.
The utility model provides a pressure sensor inserts detection circuitry, refers to fig. 1, and fig. 1 is the utility model discloses pressure sensor inserts the structural schematic diagram of the first embodiment of detection circuitry.
The pressure sensor access detection circuit comprises: the pressure sensor comprises a polarity switching module 100 and an interface P, wherein the input end of the polarity switching module 100 is connected with a power supply voltage end VDD, the output end of the polarity switching module 100 is connected with the interface P, and the interface P is used for being connected with the pressure sensor;
it should be noted that the interface P is specifically used for accessing a power supply terminal of the pressure sensor, and a signal input terminal or an output terminal of the pressure sensor is connected to the device through another interface or a contact interface; the pressure sensor access detection circuit can be arranged in equipment needing to be applied to the pressure sensor, and the pressure sensor access detection circuit can also be integrated on a chip so as to be conveniently arranged in the equipment.
The polarity switching module 100 is configured to detect whether the pressure sensor is connected, perform polarity switching according to a polarity of the pressure sensor when the pressure sensor is connected, and output a power supply voltage to the pressure sensor according to a switching result.
It is easy to understand that the polarity switching module 100 is at least provided with two sets of loops with different polarity directions, referring to fig. 1, the interface P includes a first pin 1 and a second pin 2, when the pressure sensor is connected to the interface P, if the first pin 1 corresponds to the positive pole of the pressure sensor and the second pin 2 corresponds to the negative pole of the pressure sensor, the polarity switching module 100 switches on the internal loop, and forms a power supply output in the direction from the first pin 1 to the second pin 2 of the interface P; on the contrary, if the first pin 1 corresponds to the negative electrode of the pressure sensor and the second pin 2 corresponds to the positive electrode of the pressure sensor, the polarity switching module 100 turns on the internal circuit to form a power supply output in the direction from the second pin 2 to the first pin 1 of the interface P.
It should be noted that, when a path cannot be formed between the first pin 1 and the second pin 2 due to an error in the connection manner of the pressure sensor, the polarity switching module 100 cannot supply power to the pressure sensor and output power due to the fact that internal devices cannot be conducted, so as to prevent the pressure sensor from being burnt.
Further, referring to fig. 2, fig. 2 is another schematic structural diagram of an embodiment of the pressure sensor access detection circuit of the present invention; the circuit further comprises an access detection module 200 and a micro control unit MCU, wherein a detection end of the access detection module 200 is connected with the polarity switching module 100, and an output end of the access detection module 200 is connected with the micro control unit MCU;
the access detection module 200 is configured to detect a current state of the polarity switching module 100, and output an access signal to the MCU when the current state is a power supply output state.
It should be noted that the access detection module 200 includes at least two access detection units, each access detection unit is connected to a loop in the polarity switching module 100 and detects a current state of the loop, and when the current state is a power supply output state, an access signal is output to the micro control unit MCU, so that the micro control unit MCU can confirm that the pressure sensor is currently accessed and powered.
The circuit further comprises a prompt module 300; the controlled end of the prompt module 300 is connected with the control end of the MCU;
the MCU is further configured to send an alarm control signal to the prompt module 300 when the MCU does not receive the access signal output by the access detection module 200, so that the prompt module 300 gives an alarm according to the alarm control signal.
It is easy to understand that when the access signal is not received and the device is powered on, it indicates that the pressure sensor is not accessed, and the MCU outputs a control signal to make the prompt module 300 alarm. The prompting module 300 may be a display screen, and displays a corresponding icon for prompting when the pressure sensor is not accessed; the prompt module 300 may also be a buzzer, a speaker, or other devices capable of giving an alarm, and may sound an alarm when the pressure sensor is not engaged.
Further, referring to fig. 3, fig. 3 is a schematic circuit diagram of an embodiment of the pressure sensor access detection circuit of the present invention.
The polarity switching module 100 includes a first polarity power supply unit and a second polarity power supply unit; wherein the content of the first and second substances,
the output ends of the first polarity power supply unit and the second polarity power supply unit are both connected with the interface P, the interface P is used for being connected with a pressure sensor, and the input ends of the first polarity power supply unit and the second polarity power supply unit are both connected with a power supply voltage end;
the first polarity power supply unit comprises a fourth resistor R4, a first diode D1, a sixth resistor R6, a third diode D3 and a second silicon controlled rectifier S2; the second polarity power supply unit comprises a seventh resistor R7, a fourth diode D4, a fifth resistor R5, a second diode D2 and a first silicon controlled rectifier S2; wherein the content of the first and second substances,
a first end of the fourth resistor R4 and a cathode of the first thyristor S2 are connected to a supply voltage terminal VDD, a second end of the fourth resistor R4 is connected to an anode of the first diode D1, a cathode of the first diode D1 is connected to an anode of the first thyristor S2, and a cathode of the first diode D1 is further connected to a second end of the sixth resistor R6 and one end of the interface P;
a first end of the sixth resistor R6 is connected to an anode of the third diode D3, a cathode of the third diode D3 is connected to a gate of the second thyristor S2, an anode of the second thyristor S2 is connected to one end of the interface P, and a cathode of the second thyristor S2 is connected to a supply voltage terminal VDD and a first end of a seventh resistor R7;
a second end of the seventh resistor R7 is connected to an anode of the fourth diode D4, a cathode of the fourth diode D4 is connected to an anode of the second thyristor S2, and a cathode of the fourth diode D4 is further connected to a second end of the fifth resistor R5 and one end of the interface P;
the first end of the fifth resistor R5 is connected to the anode of the second diode D2, and the cathode of the second diode D2 is connected to the gate of the first thyristor S2.
The first polarity power supply unit is used for conducting when the polarity of the pressure sensor is matched with the first polarity, and outputting power supply voltage to the pressure sensor;
it should be noted that, if the first pin 1 of the interface P corresponds to the positive pole of the pressure sensor and the second pin 2 of the interface P corresponds to the negative pole of the pressure sensor, power supply flowing from the first pin 1 to the second pin 2 should be formed. According to the polarity of the connected pressure sensor, the first diode D1 is conducted, and the first diode D1 outputs current to the second end of the sixth resistor R6 and the first pin of the interface P to enter the positive pole of the pressure sensor; further, current flows through the sixth resistor R6 to the cathode of the third diode D3, so that the gate of the second thyristor S2 receives a high level signal to trigger the second thyristor S2 to be turned on, and then the current flowing through the negative electrode of the pressure sensor may flow back through the second pin of the interface P, and then flows through the turned-on second thyristor S2 to form a power supply loop.
And the second polarity power supply unit is used for conducting when the polarity of the pressure sensor is matched with the second polarity, and outputting power supply voltage to the pressure sensor.
It should be noted that, if the first pin 1 of the interface P corresponds to the negative pole of the pressure sensor and the second pin 2 of the interface P corresponds to the positive pole of the pressure sensor, power supply flowing from the first pin 2 to the second pin 1 should be formed. According to the polarity of the connected pressure sensor, the fourth diode D4 is turned on, and the fourth diode D4 outputs current to the second end of the fifth resistor R5 and the second pin of the interface P, and enters the positive electrode of the pressure sensor; further, current flows through the fifth resistor R5 to the cathode of the second diode D2, so that the gate of the first thyristor S2 receives a high level signal to trigger the first thyristor S2 to be turned on, and then the current flowing through the negative electrode of the pressure sensor may flow back through the first pin of the interface P, and then a power supply loop is formed through the turned-on first thyristor S2.
Further, with continuing reference to fig. 3, the access detection module 200 includes a first access detection unit 201 and a second access detection unit 202, and the access signals include a first access signal and a second access signal; wherein the content of the first and second substances,
the detection end of the first access detection unit 201 is connected with one end of the first polarity power supply unit, and the output end of the first access detection unit 201 is connected with one end of the Micro Control Unit (MCU);
the first access detection unit 201 is configured to detect a current state of the first polarity power supply unit, and output a first access signal to the micro control unit MCU when the current state is a power supply output state;
the first access detection unit 201 comprises a first resistor R1, a first triode Q1, a second resistor R2, a second triode Q2 and a third resistor R3; wherein the content of the first and second substances,
a first end of the first resistor R1 is connected with a system power supply terminal VSS, a second end of the first resistor R1 is connected with one end of a micro control unit MCU, a second end of the first resistor R1 is further connected with a collector of the first triode Q1, an emitter of the first triode Q1 is grounded, and a base of the first triode Q1 is connected with a first end of the second resistor R2;
the second end of the second resistor R2 is connected to the collector of the second transistor Q2, the emitter of the second transistor Q2 is connected to the first end of the fourth resistor R4, the base of the second transistor Q2 is connected to the first end of the third resistor R3, and the second end of the third resistor R3 is connected to the cathode of the first diode D1.
It should be noted that, the first triode Q1 is an NPN triode, the second triode Q2 is a PNP triode, when the fourth resistor R4 and the first diode D1 in the first polarity power supply unit are turned on, a sufficient voltage drop is obtained between the emitter and the base of the second triode Q2, so that the second triode Q2 is turned on, the collector of the second triode Q2 is at a high level, which further triggers the first triode Q1 to be also turned on, the emitter of the first triode Q1 is grounded, and when the first triode Q1 is turned on, a ground loop from the system voltage terminal VSS to the first resistor R1 to the first triode Q1 is formed. When the first triode Q1 is not turned on, the second end of the first resistor R1 is at a high level due to the action of the system voltage terminal VSS, and when the first triode Q1 is turned on, the second end of the first resistor R1 is at a low level, the micro control unit MCU senses the low level, that is, the first access signal, and then it can be determined that the pressure sensor is currently accessed, and the access mode is that the first pin 1 corresponds to the positive electrode of the pressure sensor, and the second pin 2 corresponds to the negative electrode of the pressure sensor.
The detection end of the second access detection unit 202 is connected with one end of the second polarity power supply unit, and the output end of the second access detection unit 202 is connected with one end of the Micro Control Unit (MCU);
the second access detection unit 202 is configured to detect a current state of the second polarity power supply unit, and output a second access signal to the MCU when the current state is a power supply output state.
The second access detection unit 202 comprises a tenth resistor R10, a third triode Q3, a ninth resistor R9, a fourth triode Q4 and an eighth resistor R8; wherein the content of the first and second substances,
a first end of the tenth resistor R10 is connected to the system power supply terminal VSS, a second end of the tenth resistor R10 is connected to one end of the MCU, a second end of the tenth resistor R10 is further connected to a collector of the third transistor Q3, an emitter of the third transistor Q3 is grounded, and a base of the third transistor Q3 is connected to a second end of the ninth resistor R9;
a first end of the ninth resistor R9 is connected to a collector of the fourth transistor Q4, an emitter of the fourth transistor Q4 is connected to a first end of the seventh resistor R7, a base of the fourth transistor Q4 is connected to a first end of the eighth resistor R8, and a second end of the eighth resistor R8 is connected to a cathode of the fourth diode D4.
It should be noted that, the third triode Q3 is an NPN triode, the fourth triode Q4 is a PNP triode, when the seventh resistor R7 and the fourth diode D4 in the second polarity power supply unit are turned on, a sufficient voltage drop is obtained between the emitter and the base of the fourth triode Q4, so that the fourth triode Q4 is turned on, the collector of the fourth triode Q4 is at a high level, which further triggers the third triode Q3 to be turned on, the emitter of the third triode Q3 is grounded, and when the third triode Q3 is turned on, a ground loop from the system voltage end to the tenth resistor R10 to the third triode Q3 is formed. When the third triode Q3 is not turned on, the second end of the tenth resistor R10 is at a high level due to the action of the system voltage terminal VSS, and when the third triode Q3 is turned on, the second end of the tenth resistor R10 is at a low level, and the micro control unit MCU senses the low level, that is, the second access signal, and then it can be determined that the pressure sensor is currently accessed, and the access mode is that the second pin 2 corresponds to the positive electrode of the pressure sensor, and the first pin 1 corresponds to the negative electrode of the pressure sensor.
In specific implementation, when the prompt module 300 is a display screen, the MCU may further send corresponding control signals to the prompt module 300 according to different access signals, so that the prompt module 300 displays the current access mode of the pressure sensor.
This embodiment is through setting up the power supply circuit of changeable polarity for no matter pressure sensor is just connecing or the transposition, the polarity that the circuit homoenergetic corresponds switches over, switches on and supply power for it with pressure sensor polarity assorted route, need not to look over the positive and negative polarity of power supply end in pressure sensor's installation, has saved the required installation time of pressure sensor, prevents that positive and negative transposition from leading to the device to burn out or damage in the installation. Furthermore, an access detection module is further arranged, whether the pressure sensor is in a working state or not can be detected in time after the power is on, and the pressure sensor arranged in the equipment can be effectively prevented from being missed.
Furthermore, for realizing the above object, the utility model discloses still provide a pressure sensor inserts detection device, pressure sensor inserts detection device includes as above pressure sensor inserts detection circuitry.
Since the access detection device for the pressure sensor adopts all technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and are not repeated herein.
Furthermore, in order to achieve the above object, the present invention further provides an electronic device, which includes the pressure sensor access detection circuit as described above.
Since the electronic device adopts all technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and no further description is given here.
It should be understood that the above is only an example, and the technical solution of the present invention is not limited in any way, and in the specific application, those skilled in the art can set the solution as required, and the present invention is not limited thereto.
It should be noted that the above-described work flow is only illustrative, and does not limit the scope of the present invention, and in practical applications, a person skilled in the art may select some or all of them to achieve the purpose of the solution of the embodiment according to practical needs, and the present invention is not limited herein.
In addition, the technical details that are not elaborated in this embodiment can be referred to the pressure sensor access detection circuit provided in any embodiment of the present invention, and are not described herein again.
Further, it is to be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above embodiment numbers of the present invention are only for description, and do not represent the advantages and disadvantages of the embodiments.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. A pressure sensor access detection circuit, comprising: the input end of the polarity switching module is connected with a power supply voltage end, the output end of the polarity switching module is connected with the interface, and the interface is used for being connected with the pressure sensor;
the polarity switching module is used for detecting whether the pressure sensor is connected or not, switching the polarity according to the polarity of the pressure sensor when the pressure sensor is connected, and outputting power supply voltage to the pressure sensor according to the switching result.
2. The pressure sensor access detection circuit of claim 1, further comprising an access detection module and a micro control unit, wherein a detection end of the access detection module is connected to the polarity switching module, and an output end of the access detection module is connected to the micro control unit;
the access detection module is used for detecting the current state of the polarity switching module and outputting an access signal to the micro control unit when the current state is a power supply output state.
3. The pressure sensor access detection circuit of claim 2, wherein the circuit further comprises a prompt module; the controlled end of the prompt module is connected with the control end of the micro control unit;
and the micro control unit is also used for sending an alarm control signal to the prompting module when the access signal output by the access detection module is not received, so that the prompting module gives an alarm according to the alarm control signal.
4. The pressure sensor access detection circuit of claim 2, wherein the polarity switching module comprises a first polarity power supply unit and a second polarity power supply unit; wherein the content of the first and second substances,
the output ends of the first polarity power supply unit and the second polarity power supply unit are both connected with the interface, the interface is used for being connected with the pressure sensor, and the input ends of the first polarity power supply unit and the second polarity power supply unit are both connected with the power supply voltage end;
the first polarity power supply unit is used for conducting when the polarity of the pressure sensor is matched with the first polarity, and outputting power supply voltage to the pressure sensor;
and the second polarity power supply unit is used for conducting when the polarity of the pressure sensor is matched with the second polarity, and outputting power supply voltage to the pressure sensor.
5. The pressure sensor access detection circuit of claim 4, wherein the access detection module comprises a first access detection unit and a second access detection unit, the access signals comprising a first access signal and a second access signal; wherein the content of the first and second substances,
the detection end of the first access detection unit is connected with one end of the first polarity power supply unit, and the output end of the first access detection unit is connected with one end of the micro control unit;
the first access detection unit is used for detecting the current state of the first polarity power supply unit and outputting a first access signal to the micro control unit when the current state is a power supply output state;
the detection end of the second access detection unit is connected with one end of the second polarity power supply unit, and the output end of the second access detection unit is connected with one end of the micro control unit;
and the second access detection unit is used for detecting the current state of the second polarity power supply unit and outputting a second access signal to the micro control unit when the current state is a power supply output state.
6. The pressure sensor access detection circuit of claim 5, wherein the first polarity supply unit comprises a fourth resistor, a first diode, a sixth resistor, a third diode, and a second thyristor; the second polarity power supply unit comprises a seventh resistor, a fourth diode, a fifth resistor, a second diode and a first silicon controlled rectifier; wherein the content of the first and second substances,
the first end of the fourth resistor and the cathode of the first controllable silicon are connected with a power supply voltage end, the second end of the fourth resistor is connected with the anode of the first diode, the cathode of the first diode is connected with the anode of the first controllable silicon, and the cathode of the first diode is also connected with the second end of the sixth resistor and one end of the interface;
the first end of the sixth resistor is connected with the anode of the third diode, the cathode of the third diode is connected with the gate level of the second controllable silicon, the anode of the second controllable silicon is connected with one end of the interface, and the cathode of the second controllable silicon is connected with a power supply voltage end and the first end of the seventh resistor;
the second end of the seventh resistor is connected with the anode of the fourth diode, the cathode of the fourth diode is connected with the anode of the second controllable silicon, and the cathode of the fourth diode is also connected with the second end of the fifth resistor and one end of the interface;
and the first end of the fifth resistor is connected with the anode of the second diode, and the cathode of the second diode is connected with the gate level of the first controllable silicon.
7. The pressure sensor access detection circuit of claim 6, wherein the first access detection unit comprises a first resistor, a first transistor, a second resistor, a second transistor, and a third resistor; wherein the content of the first and second substances,
the first end of the first resistor is connected with a system power supply end, the second end of the first resistor is connected with one end of the micro control unit, the second end of the first resistor is also connected with a collector of the first triode, an emitter of the first triode is grounded, and a base of the first triode is connected with the first end of the second resistor;
the second end of the second resistor is connected with the collector of the second triode, the emitter of the second triode is connected with the first end of the fourth resistor, the base of the second triode is connected with the first end of the third resistor, and the second end of the third resistor is connected with the cathode of the first diode.
8. The pressure sensor access detection circuit of claim 6, wherein the second access detection unit comprises a tenth resistor, a third transistor, a ninth resistor, a fourth transistor, and an eighth resistor; wherein the content of the first and second substances,
a first end of the tenth resistor is connected with a system power supply end, a second end of the tenth resistor is connected with one end of the micro control unit, a second end of the tenth resistor is also connected with a collector of the third triode, an emitter of the third triode is grounded, and a base of the third triode is connected with a second end of the ninth resistor;
the first end of the ninth resistor is connected with the collector of the fourth triode, the emitter of the fourth triode is connected with the first end of the seventh resistor, the base of the fourth triode is connected with the first end of the eighth resistor, and the second end of the eighth resistor is connected with the cathode of the fourth diode.
9. A pressure sensor access detection device, characterized in that the pressure sensor access detection device comprises a pressure sensor access detection circuit according to any one of claims 1 to 8.
10. An electronic device, characterized in that the electronic device comprises the pressure sensor access detection circuit according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120649614.8U CN215180558U (en) | 2021-03-30 | 2021-03-30 | Pressure sensor access detection circuit, device and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120649614.8U CN215180558U (en) | 2021-03-30 | 2021-03-30 | Pressure sensor access detection circuit, device and electronic equipment |
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| Publication Number | Publication Date |
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| CN215180558U true CN215180558U (en) | 2021-12-14 |
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| CN202120649614.8U Active CN215180558U (en) | 2021-03-30 | 2021-03-30 | Pressure sensor access detection circuit, device and electronic equipment |
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