WO2024098537A1 - 一种供电断线检测系统及车辆系统 - Google Patents

一种供电断线检测系统及车辆系统 Download PDF

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Publication number
WO2024098537A1
WO2024098537A1 PCT/CN2022/143271 CN2022143271W WO2024098537A1 WO 2024098537 A1 WO2024098537 A1 WO 2024098537A1 CN 2022143271 W CN2022143271 W CN 2022143271W WO 2024098537 A1 WO2024098537 A1 WO 2024098537A1
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WIPO (PCT)
Prior art keywords
power supply
disconnection detection
electrically connected
mos tube
sensor chip
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PCT/CN2022/143271
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English (en)
French (fr)
Inventor
张超
彭思达
杨莹
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赛卓电子科技(上海)股份有限公司
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Publication of WO2024098537A1 publication Critical patent/WO2024098537A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/54—Testing for continuity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/58—Testing of lines, cables or conductors

Definitions

  • the present invention relates to the field of circuit technology, and in particular to a power supply disconnection detection system and a vehicle system.
  • Sensor chips are often used in the vehicle field. When a fault occurs between the sensor chip and the power supply or ground terminal, the sensor chip will experience power supply abnormality, which will cause the output signal of the sensor chip to be abnormal. In addition, the controller cannot effectively identify the output signal of the sensor chip as an abnormal signal, causing the entire vehicle system to work abnormally, which can easily cause serious traffic accidents.
  • the present application provides a power supply disconnection detection system and a vehicle system for effectively identifying whether an output signal of a sensor chip is abnormal.
  • the present application provides a power disconnection detection system, which includes:
  • a power supply signal input terminal provided in the sensor chip and used for being electrically connected to the power supply terminal
  • a disconnection detection circuit which is disposed in the sensor chip, electrically connected to the power supply signal input terminal, and includes a disconnection detection output terminal;
  • the controller includes a detection end, which is electrically connected to the disconnection detection output end.
  • the controller detects the electrical signal output by the disconnection detection circuit through the detection end, and determines the on/off state of the sensor chip and the power supply end or the ground end according to the electrical signal.
  • the electrical signal includes a first electrical signal and a second electrical signal
  • the disconnection detection circuit includes:
  • a power supply signal transmission circuit comprising a first end, a second end and a third end, wherein the first end is electrically connected to the detection circuit, the second end is electrically connected to the power supply signal input end, and the third end is electrically connected to the disconnection detection output end;
  • the detection and control circuit When the sensor chip is in a conducting state with the power supply terminal and the ground terminal, the detection and control circuit turns on the power supply signal transmission circuit, so that the disconnection detection output terminal outputs the first electrical signal;
  • the detection and control circuit disconnects the power supply signal transmission circuit, so that the disconnection detection output terminal outputs the second electrical signal.
  • the disconnection detection circuit includes a pull-up resistor, one end of the pull-up resistor is electrically connected between the third end of the power supply signal transmission circuit and the controller, and the other end is electrically connected to the power supply end;
  • the detection circuit disconnects the power supply signal transmission circuit and pulls up the second electrical signal transmitted to the disconnection detection output terminal to a high level signal through the pull-up resistor;
  • the disconnection detection circuit comprises a pull-down resistor, one end of the pull-down resistor is electrically connected between the third end of the power supply signal transmission circuit and the controller, and the other end is electrically connected to the ground end;
  • the detection circuit disconnects the power supply signal transmission circuit and pulls down the second electrical signal transmitted to the disconnection detection output terminal to a low level signal through the pull-down resistor.
  • the detection and control circuit includes a first MOS tube and a second MOS tube;
  • the power supply signal transmission circuit includes a third MOS tube and a fourth MOS tube;
  • the source of the first MOS tube is electrically connected to the power supply end, and the gate of the first MOS tube is connected to the ground end;
  • the drain of the second MOS tube is electrically connected to the drain of the first MOS tube, and the gate of the second MOS tube is electrically connected to the source of the second MOS tube;
  • the source of the third MOS tube is electrically connected to the power supply signal input end, and the gate of the third MOS tube is electrically connected between the drain of the first MOS tube and the drain of the second MOS tube;
  • the drain of the fourth MOS tube is electrically connected to the drain of the third MOS tube, the gate of the fourth MOS tube is electrically connected to the source of the second MOS tube, and the source of the fourth MOS tube is electrically connected to the disconnection detection output end;
  • the first MOS transistor turns on the third MOS transistor, and the second MOS transistor turns on the fourth MOS transistor, so that the disconnection detection output terminal outputs the first electrical signal;
  • the first MOS transistor turns off the third MOS transistor, and the second MOS transistor turns off the fourth MOS transistor, so that the disconnection detection output end outputs the second electrical signal.
  • the detection circuit further includes a first resistor, one end of the first resistor is electrically connected between the drain of the first MOS tube and the gate of the third MOS tube, and the other end of the first resistor is electrically connected to the source of the third MOS tube;
  • the first resistor turns off the third MOS transistor.
  • the detection circuit further includes the second resistor, one end of the second resistor is electrically connected between the source of the second MOS tube and the gate of the fourth MOS tube, and the other end of the second resistor is electrically connected to the source of the fourth MOS tube;
  • the second resistor turns off the fourth MOS transistor.
  • the first MOS tube, the second MOS tube, the third MOS tube and the fourth MOS tube are all high-voltage MOS tubes.
  • the detection and control circuit further includes a charge pump, and the charge pump is electrically connected between the power supply terminal and the source of the first MOS tube.
  • the power disconnection detection system further includes a buffer, which is disposed in the sensor chip and electrically connected between the power supply terminal and the power supply signal input terminal.
  • the present application also provides a vehicle system, which includes the power supply disconnection detection system as described above.
  • the present application provides a power disconnection detection system and a vehicle system, wherein the power disconnection detection system includes a sensor chip and a power supply terminal and a ground terminal electrically connected to the sensor chip, a power supply signal input terminal, a disconnection detection circuit and a controller.
  • the power supply signal input terminal is used to be electrically connected to the power supply terminal.
  • the disconnection detection circuit is electrically connected to the power supply signal input terminal and includes a disconnection detection output terminal.
  • the controller includes a detection terminal. The detection terminal is electrically connected to the disconnection detection output terminal, and the controller detects the electrical signal output by the disconnection detection circuit through the detection terminal, and determines the on-off state of the sensor chip and the power supply terminal or the ground terminal based on the electrical signal. In this way, by setting a disconnection detection circuit in the sensor chip, the controller can detect the electrical signal output by the disconnection detection circuit, and then identify whether the sensor chip is disconnected from the power supply terminal or the ground terminal, thereby avoiding accidents.
  • FIG1 is a circuit diagram showing a sensor chip of the power disconnection detection system of the present application being connected to a power supply terminal and a ground terminal.
  • FIG. 2 is a schematic diagram of output signals of a sensor chip of the power disconnection detection system of the present application shown in FIG. 1 .
  • FIG3 is a circuit diagram showing a situation in which the sensor chip of the power supply disconnection detection system of the present application is disconnected from the power supply terminal.
  • FIG4 is a circuit diagram showing a sensor chip of the power supply disconnection detection system of the present application being disconnected from the ground terminal.
  • FIG. 5 is a schematic diagram of output signals of the sensor chip of the power disconnection detection system of the present application shown in FIG. 3 or FIG. 4 .
  • FIG6 shows a circuit block diagram of the power disconnection detection system of the present application.
  • FIG. 7 is a schematic diagram of a voltage signal at a disconnection detection output terminal detected by a controller when a sensor chip of the power disconnection detection system of the present application shown in FIG. 6 is powered off.
  • FIG8 shows another circuit block diagram of the power disconnection detection system of the present application.
  • FIG. 9 is a schematic diagram of a voltage signal at a disconnection detection output terminal detected by a controller when the sensor chip of the power disconnection detection system of the present application shown in FIG. 8 is powered off.
  • FIG. 10 is a circuit diagram of an embodiment of the power supply disconnection detection system of the present application shown in FIG. 6 .
  • FIG. 11 is a circuit diagram of an embodiment of the power supply disconnection detection system for the sensor of the present application shown in FIG. 8 .
  • words such as “front”, “rear”, “lower” and/or “upper” are only for the convenience of explanation and are not limited to one position or one spatial orientation. Words such as “include” or “comprise” mean that the elements or objects appearing in front of “include” or “comprise” cover the elements or objects listed after “include” or “comprise” and their equivalents, and do not exclude other elements or objects.
  • "Connected” or “connected” and similar words are not limited to physical or mechanical connections, and may include electrical connections, whether direct or indirect.
  • the singular forms “a”, “said” and “the” used in this specification and the appended claims are also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the term “and/or” used herein refers to and includes any or all possible combinations of one or more associated listed items.
  • the power supply disconnection detection system includes a sensor chip and a power supply terminal and a ground terminal electrically connected to the sensor chip, a power supply signal input terminal, a disconnection detection circuit and a controller.
  • the power supply signal input terminal is used to be electrically connected to the power supply terminal.
  • the disconnection detection circuit is electrically connected to the power supply signal input terminal and includes a disconnection detection output terminal.
  • the controller includes a detection terminal. The detection terminal is electrically connected to the disconnection detection output terminal, and the controller detects the electrical signal output by the disconnection detection circuit through the detection terminal, and determines the on-off state of the sensor chip and the power supply terminal or the ground terminal based on the electrical signal. In this way, by setting a disconnection detection circuit in the sensor chip, the controller can detect the electrical signal output by the disconnection detection circuit, and then identify whether the sensor chip is disconnected from the power supply terminal or the ground terminal, thereby avoiding accidents.
  • the present application also provides a vehicle system, including a power disconnection detection system.
  • Figure 1 is a circuit diagram of a sensor chip 2 of a power disconnection detection system 1 provided by the present application being connected to a power supply terminal VDD and a ground terminal GND.
  • Figure 2 is a schematic diagram of an output signal of a sensor chip 2 of a power disconnection detection system 1 provided by the present application shown in Figure 1 .
  • the power supply disconnection detection system 1 includes a power supply terminal VDD, a ground terminal GND, and a sensor chip 2.
  • the sensor chip 2 includes a power pin 3 and a ground pin 4, wherein the power pin 3 is electrically connected to the power supply terminal VDD, and the ground pin 4 is electrically connected to the ground terminal GND.
  • the sensor chip 2 works normally, and the output terminal Vout outputs a normal signal (as shown in FIG. 2), and the oblique line S1 in FIG. 2 represents the voltage output by the output terminal Vout.
  • FIG3 is a circuit diagram showing that the sensor chip 2 of the power disconnection detection system 1 provided by the present application is disconnected from the power supply terminal VDD.
  • FIG4 is a circuit diagram showing that the sensor chip 2 of the power disconnection detection system 1 provided by the present application is disconnected from the ground terminal GND.
  • FIG5 is a schematic diagram of the output signal of the sensor chip 2 of the power disconnection detection system 1 provided by the present application shown in FIG3 or FIG4.
  • the sensor chip 2 when the power pin 3 of the sensor chip 2 is disconnected from the power terminal VDD (as shown in FIG. 3), or the ground pin 4 of the sensor chip 2 is disconnected from the ground terminal GND (as shown in FIG. 4), the sensor chip 2 cannot work normally and outputs an abnormal signal accordingly (as shown in FIG. 5).
  • the curve S2 in FIG. 5 represents the voltage output by the output terminal Vout of the sensor chip 2 in FIG. 3 or FIG. 4.
  • the system cannot detect whether the sensor chip 2 is disconnected from the power terminal VDD or the ground terminal GND, that is, it cannot detect whether the signal output by the sensor chip 2 is an abnormal signal.
  • the vehicle system will cause serious traffic accidents because it cannot recognize that the output of the sensor chip 2 is an abnormal signal.
  • FIG6 is a circuit block diagram of the power disconnection detection system 1 provided by the present application.
  • the power disconnection detection system 1 also includes a power supply signal input terminal 6, a disconnection detection circuit 7 and a controller 8.
  • the power supply signal input terminal 6 is arranged in the sensor chip 2, and is used to be electrically connected to the power supply terminal VDD.
  • the disconnection detection circuit 7 is arranged in the sensor chip 2, is electrically connected to the power supply signal input terminal 6, and includes a disconnection detection output terminal 9.
  • the controller 8 includes a detection terminal 10.
  • the detection terminal 10 is electrically connected to the disconnection detection output terminal 9, and is used to detect the electrical signal output by the disconnection detection circuit 7.
  • the controller 8 detects the electrical signal output by the disconnection detection circuit 7 through the detection terminal 10, and determines the on-off state of the power supply pin 3 of the sensor chip 2 and the power supply terminal VDD, or the on-off state of the ground pin 4 of the sensor chip 2 and the ground terminal GND according to the electrical signal.
  • the controller 8 determines whether the sensor chip 2 is connected to the power supply terminal VDD or the ground terminal GND by detecting the electrical signal output by the disconnection detection circuit 7.
  • the electrical signal includes a first electrical signal and a second signal.
  • the first electrical signal refers to an electrical signal between the voltage of the power supply terminal VDD and the voltage of the ground terminal GND output by the disconnection detection output terminal 9, but it will not be very close to the voltage of the power supply terminal VDD and the voltage of the ground terminal GND, which is a normal signal.
  • the second electrical signal refers to an electrical signal that the disconnection detection output terminal 9 outputs the voltage of the power supply terminal VDD or the voltage of the ground terminal GND, which is an abnormal signal.
  • the controller 8 can confirm that the signal output by the sensor chip 2 is a normal signal.
  • the detection terminal 10 detects that the disconnection detection output terminal 9 outputs an electrical signal of the voltage of the power supply terminal VDD or the voltage of the ground terminal GND, it means that the power pin 3 of the sensor chip 2 is disconnected from the power supply terminal VDD or the ground pin 4 of the sensor chip 2 is disconnected from the ground terminal GND.
  • the controller 8 can confirm that the signal output by the sensor chip 2 is an abnormal signal, and then the vehicle system executes protective measures to avoid safety failures.
  • the disconnection detection circuit 7 includes a detection and control circuit 11 and a power supply signal transmission circuit 12 .
  • the power supply signal transmission circuit 12 includes a first terminal 13, a second terminal 14 and a third terminal 15, wherein the first terminal 13 is electrically connected to the detection circuit 11, the second terminal 14 is electrically connected to the power supply signal input terminal 6, and the third terminal 15 is electrically connected to the disconnection detection output terminal 9.
  • the detection circuit 11 is turned on, and the power supply signal transmission circuit 12 is turned on, so that the disconnection detection output terminal 9 outputs a first electrical signal.
  • the controller 8 confirms through the detection terminal 10 that the power supply pin 3 of the sensor chip 2 is normally electrically connected to the power supply terminal VDD, and the ground pin 4 is normally electrically connected to the ground terminal GND.
  • the detection circuit 11 When the sensor chip 2 is disconnected from the power supply terminal VDD or the ground terminal GND, the detection circuit 11 is disconnected, and the power supply signal transmission circuit 12 is disconnected, so that the disconnection detection output terminal 9 outputs a second electrical signal.
  • the controller 8 confirms through the detection terminal 10 that the power pin 3 of the sensor chip 2 is disconnected from the power supply terminal VDD or the ground pin 4 is disconnected from the ground terminal GND, so that the controller 8 can identify the signal output by the sensor chip 2 as an abnormal signal, and then the vehicle system can execute protective measures to avoid safety failures.
  • FIG7 is a schematic diagram of a voltage signal at the disconnection detection output terminal 9 detected by the controller 8 when the sensor chip 4 of the power supply disconnection detection system 1 provided by the present application shown in FIG6 is powered off.
  • the disconnection detection circuit 7 includes a pull-up resistor Rpu, one end of the pull-up resistor Rpu is electrically connected between the third end 15 of the power supply signal transmission circuit 12 and the controller 8, and the other end is electrically connected to the power supply terminal VDD.
  • the detection circuit 11 disconnects the power supply signal transmission circuit 12, and pulls up the second electrical signal transmitted to the disconnection detection output terminal 9 to a high level signal through the pull-up resistor Rpu.
  • the detection circuit 11 and the power supply signal transmission circuit 12 are both in a no-power state, and the pull-up resistor Rpu pulls up the voltage transmitted to the disconnection detection output terminal 9 to the level of the power supply terminal VDD (as shown in FIG7), and the straight line S3 in FIG7 is the voltage output by the disconnection detection output terminal 9 at this time.
  • the detection end 10 of the controller 8 can detect that the voltage at the disconnection detection output terminal 9 is the power supply terminal VDD voltage, and the controller 8 can further identify that the electrical signal output by the sensor chip 2 is an abnormal signal.
  • the detection and control circuit 11 makes the power supply signal transmission circuit 12 disconnected, so that the pull-up resistor Rpu can pull the voltage transmitted to the disconnection detection output terminal 9 up to the power supply terminal VDD level.
  • the detection end 10 of the controller 8 can detect that the voltage at the disconnection detection output terminal 9 is the power supply terminal VDD voltage, and the controller 8 can further identify that the signal output by the sensor chip 2 is an abnormal signal. In this way, the vehicle system executes protective measures in advance to avoid safety failures.
  • FIG8 shows another circuit block diagram of the power supply disconnection detection system 1 of the present application.
  • FIG9 is a schematic diagram of the voltage signal at the disconnection detection output terminal 9 detected by the controller 8 when the sensor chip 4 of the power supply disconnection detection system 1 provided by the present application shown in FIG8 is powered off.
  • the disconnection detection circuit 7 includes a pull-down resistor Rpd, one end of the pull-down resistor Rpd is electrically connected between the third terminal 15 of the power supply signal transmission circuit 12 and the controller 8, and the other end is electrically connected to the ground terminal GND.
  • the detection circuit 11 disconnects the power supply signal transmission circuit 12, and pulls down the second electrical signal transmitted to the disconnection detection output terminal 9 to a low-level signal through the pull-down resistor Rpd.
  • the detection circuit 11 and the power supply signal transmission circuit 12 are both in a no-power state, and the pull-down resistor Rpd pulls down the voltage transmitted to the disconnection detection output terminal 9 to the level of the ground terminal GND (as shown in FIG9 ).
  • the straight line S4 in FIG9 is the voltage output by the disconnection detection output terminal 9 at this time.
  • the detection terminal 10 of the controller 8 can detect that the voltage at the disconnection detection output terminal 9 is the voltage of the ground terminal GND, and the controller 8 can further identify that the signal output by the sensor chip 2 is an abnormal signal.
  • the ground pin 4 of the sensor chip 2 is disconnected from the ground terminal GND, the entire sensor chip 2 will be in a ground line suspended state, and the detection circuit 11 is disconnected, which also makes the power supply signal transmission circuit 12 disconnected, so that the pull-down resistor Rpd can pull down the voltage transmitted to the disconnection detection output terminal 9 to the level of the ground terminal GND.
  • the detection terminal 10 of the controller 8 can detect that the voltage at the disconnection detection output terminal 9 is the voltage of the ground terminal GND, and the controller 8 can further identify that the signal output by the sensor chip 2 is an abnormal signal. In this way, the vehicle system can execute protective measures in advance to avoid safety failures.
  • FIG10 is a circuit diagram of an embodiment of the power supply disconnection detection system 1 of the present application shown in FIG6.
  • the detection circuit 11 includes a first MOS transistor P1 and a second MOS transistor P2.
  • the first MOS transistor P1 and the second MOS transistor P2 are both P-type MOS transistors.
  • the power supply signal transmission circuit 12 includes a third MOS transistor N1 and a fourth MOS transistor N2.
  • the third MOS transistor N1 and the fourth MOS transistor N2 are both N-type MOS transistors.
  • the source of the first MOS transistor P1 is electrically connected to the power supply terminal VDD, and the gate of the first MOS transistor P1 is connected to the ground terminal GND.
  • the drain of the second MOS transistor P2 is electrically connected to the drain of the first MOS transistor P1, and the gate of the second MOS transistor P2 is electrically connected to the source of the second MOS transistor P2.
  • the source of the third MOS transistor N1 is electrically connected to the power supply signal input terminal 6, and the gate of the third MOS transistor N1 is electrically connected between the drain of the first MOS transistor P1 and the drain of the second MOS transistor P2.
  • the drain of the fourth MOS tube N2 is electrically connected to the drain of the third MOS tube N1, the gate of the fourth MOS tube N2 is electrically connected to the source of the second MOS tube P2, and the source of the fourth MOS tube N2 is electrically connected to the disconnection detection output terminal 9.
  • the disconnection detection output terminal 9 outputs a first electrical signal, indicating that the signal output by the sensor chip 2 is a normal signal.
  • the first MOS tube P1 When the sensor chip 2 is disconnected from the power supply terminal VDD, the first MOS tube P1 is in an off state, thereby turning off the third MOS tube N1, and the second MOS tube P2 is also in an off state, thereby turning off the fourth MOS tube N2.
  • the voltage transmitted to the disconnection detection output terminal 9 can be pulled up to the level of the power supply terminal VDD through the pull-up resistor Rpu, so that the disconnection detection output terminal 9 outputs a second electrical signal, indicating that the signal output by the sensor chip 2 is an abnormal signal.
  • the first MOS transistor P1 , the second MOS transistor P2 , the third MOS transistor N1 , and the fourth MOS transistor N2 are all high-voltage MOS transistors, which are advantageous in allowing a relatively large voltage to pass through.
  • the detection circuit 11 further includes a first resistor R1, one end of the first resistor R1 is electrically connected between the drain of the first MOS transistor P1 and the gate of the third MOS transistor N1, and the other end is electrically connected to the source of the third MOS transistor N1.
  • the first resistor R1 turns off the third MOS transistor N1.
  • the disconnection detection output terminal 9 is electrically connected to the pull-up resistor Rpu, and when the sensor chip 2 is disconnected from the ground terminal GND, the first MOS tube P1 is turned off.
  • the pull-up resistor Rpu pulls the voltage signal transmitted to the disconnection detection output terminal 9 to a high-level signal, and then, the detection terminal 10 of the controller 8 can detect that the voltage at the disconnection detection output terminal 9 is the power supply terminal VDD voltage, and further, the controller 8 can identify that the signal output by the sensor chip 2 is an abnormal signal.
  • FIG11 is a circuit diagram of an embodiment of the power supply disconnection detection system 1 of the present application shown in FIG8.
  • the detection circuit 11 further includes a second resistor R2, one end of the second resistor R2 is electrically connected between the source of the second MOS transistor P2 and the gate of the fourth MOS transistor N2, and the other end is electrically connected to the source of the fourth MOS transistor N2.
  • the second resistor R2 turns off the fourth MOS transistor N2.
  • the disconnection detection output terminal 9 is electrically connected to the pull-down resistor Rpd, and when the sensor chip 2 is disconnected from the ground terminal GND, the first MOS tube P1 is turned off.
  • the fourth MOS tube N2 may be turned on. Therefore, by short-circuiting the second resistor R2 between the gate and the source of the fourth MOS tube N2, the fourth MOS tube N2 is turned off, and the disconnection detection output terminal 9 is in a power-free state, so that the pull-down resistor Rpd pulls down the signal transmitted to the disconnection detection output terminal 9 to a low-level signal, and then, the detection terminal 10 of the controller 8 can detect that the voltage at the disconnection detection output terminal 9 is the ground terminal GND voltage, and further, the controller 8 can identify that the signal output by the sensor chip 2 is an abnormal signal.
  • the detection circuit 11 further includes a charge pump 16, which is electrically connected between the power supply terminal VDD and the source of the first MOS transistor P1.
  • the charge pump 16 is used to increase the voltage of the power supply terminal VDD so that the voltage input to the first MOS transistor P1 is higher than the voltage of the power supply terminal VDD by 3V.
  • the voltage of the power supply terminal VDD can be 5V, so after the voltage is boosted by the charge pump 16, the voltage input to the source of the first MOS transistor P1 is 8V, and the conduction voltage of the first MOS transistor P1 is 7V, which is conducive to the smooth conduction of the first MOS transistor P1.
  • the sensor 1 further includes a buffer 17, which is disposed in the sensor chip 2 and electrically connected between the power supply terminal VDD and the power supply signal input terminal 6.
  • the buffer 17 is used to drive the voltage signal transmitted to the power supply signal transmission circuit 12, and when the power supply pin 3 of the sensor chip 2 is connected to the power supply terminal VDD, it is beneficial to turn on the third MOS tube N1 of the power supply signal transmission circuit 12.

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Abstract

本申请提供一种供电断线检测系统及车辆系统。供电断线检测系统包括传感器芯片和与传感器芯片电连接的电源端和地端、供电信号输入端、断线检测电路及控制器。供电信号输入端用于与电源端电连接。断线检测电路与供电信号输入端电连接，且包括断线检测输出端。控制器包括检测端。检测端与断线检测输出端电连接，控制器通过检测端检测断线检测电路输出的电信号，并根据电信号确定传感器芯片与电源端或地端的通断状态。传感器包括电源端、地端、芯片及供电断线检测系统。如此，通过在传感器芯片内设置断线检测电路，使得控制器通过检测断线检测电路输出的电信号，进而可识别出传感器芯片与电源端或地端是否断开，从而可避免发生事故。

Description

一种供电断线检测系统及车辆系统 技术领域
本发明涉及电路技术领域，具体是涉及一种供电断线检测系统及车辆系统。
背景技术
传感器芯片常应用在车辆领域，当传感器芯片与电源端或地端发生故障时，会造成传感器芯片发生供电异常情况，从而导致传感器芯片的输出信号异常。并且，控制器不能有效识别出该传感器芯片的输出信号为异常信号，从而使整个车辆系统工作异常，容易造成严重的交通事故。
发明内容
本申请提供一种旨在有效识别传感器芯片的输出信号是否异常的供电断线检测系统及车辆系统。
本申请提供一种供电断线检测系统，其中，包括：
传感器芯片和与所述传感器芯片电连接的电源端和地端；
供电信号输入端，设于所述传感器芯片内，用于与所述电源端电连接；
断线检测电路，设于所述传感器芯片内，与所述供电信号输入端电连接，且包括断线检测输出端；及
控制器，包括检测端，所述检测端与所述断线检测输出端电连接，所述控制器通过所述检测端检测所述断线检测电路输出的电信号，并根据所述电信号确定所述传感器芯片与所述电源端或所述地端的通断状态。
可选的，所述电信号包括第一电信号和第二电信号；所述断线检测电路包括：
检控电路；
供电信号传输电路，包括第一端、第二端及第三端，其中所述第一端与所述检控电路电连接，所述第二端与所述供电信号输入端电连接，所述第三端与所述断线检测输出端电连接；
当所述传感器芯片与所述电源端、所述地端处于导通状态时，所述检控电路使所述供电信号传输电路导通，从而使所述断线检测输出端输出所述第一电信号；
当所述传感器芯片与所述电源端或所述地端处于断开状态时，所述检控电路使所述供电信号传输电路断开，从而使所述断线检测输出端输出所述第二电信号。
可选的，所述断线检测电路包括上拉电阻，所述上拉电阻的一端电连接于所述供电信号传输电路的所述第三端和所述控制器之间，另一端与所述电源端电连接；
当所述传感器芯片与所述电源端或所述地端处于断开状态时，所述检控电路使所述供电信号传输电路断开，并通过所述上拉电阻将传输至所述断线检测输出端的所述第二电信号上拉至高电平信号；或
所述断线检测电路包括下拉电阻，所述下拉电阻的一端电连接于所述供电信号传输电路的所述第三端和所述控制器之间，另一端与所述地端电连接；
当所述传感器芯片与所述电源端或所述地端处于断开状态时，所述检控电路使所述供电信号传输电路断开，并通过所述下拉电阻将传输至所述断线检测输出端的所述第二电信号下拉至低电平信号。
可选的，所述检控电路包括第一MOS管和第二MOS管；所述供电信号传输电路包括第三MOS管和第四MOS管；
所述第一MOS管的源极与所述电源端电连接，所述第一MOS管的栅极与所述地端连接；所述第二MOS管的漏极与所述第一MOS管的漏极电连接，所述第二MOS管的栅极电连接所述第二MOS管的源极；所述第三MOS管的源极电连接所述供电信号输入端，所述第三MOS管的栅极电连接于所述第一MOS 管的漏极和所述第二MOS管的漏极之间；所述第四MOS管的漏极电连接所述第三MOS管的漏极，所述第四MOS管的栅极电连接所述第二MOS管的源极，所述第四MOS管的源极电连接所述断线检测输出端；
当所述传感器芯片与所述电源端、所述地端处于导通状态时，所述第一MOS管使所述第三MOS管导通，且所述第二MOS管使所述第四MOS管导通，从而使所述断线检测输出端输出所述第一电信号；
当所述传感器芯片与所述电源端处于断开状态时，所述第一MOS管使所述所述第三MOS管关断，且所述第二MOS管使所述第四MOS管关断，从而使所述断线检测输出端输出所述第二电信号。
可选的，所述检控电路还包括第一电阻，所述第一电阻的一端电连接于所述第一MOS管的漏极和所述第三MOS管的栅极之间，另一端电连接所述第三MOS管的源极；
当所述传感器芯片与所述地端处于断开状态时，所述第一电阻使所述第三MOS管关断。
可选的，所述检控电路还包括所述第二电阻，所述第二电阻的一端电连接于所述第二MOS管的源极和所述第四MOS管的栅极之间，另一端电连接所述第四MOS管的源极；
当所述传感器芯片与所述地端处于断开状态时，所述第二电阻使所述第四MOS管关断。
可选的，所述第一MOS管、所述第二MOS管、所述第三MOS管及所述第四MOS管均为高压MOS管。
可选的，所述检控电路还包括电荷泵，所述电荷泵电连接于所述电源端和所述第一MOS管的源极之间。
可选的，所述供电断线检测系统还包括缓冲器，所述缓冲器设于所述传感器芯片内，且电连接于所述电源端和所述供电信号输入端之间。
本申请还提供一种车辆系统，其中，包括如上述所述的供电断线检测系统。
本申请提供的供电断线检测系统及车辆系统，其中供电断线检测系统包括 传感器芯片和与传感器芯片电连接的电源端和地端、供电信号输入端、断线检测电路及控制器。供电信号输入端用于与电源端电连接。断线检测电路与供电信号输入端电连接，且包括断线检测输出端。控制器包括检测端。检测端与断线检测输出端电连接，控制器通过检测端检测断线检测电路输出的电信号，并根据电信号确定传感器的芯片与电源端或地端的通断状态。如此，通过在传感器芯片内设置断线检测电路，使得控制器通过检测断线检测电路输出的电信号，进而可识别出传感器的芯片与电源端或地端是否断开，从而可避免发生事故。
附图说明
图1所示为本申请的供电断线检测系统的传感器芯片与电源端、地端导通的电路图。
图2为图1所示的本申请的供电断线检测系统的传感器芯片的输出信号示意图。
图3所示为本申请的供电断线检测系统的传感器芯片与电源端断开的电路图。
图4所示为本申请的供电断线检测系统的传感器芯片与地端断开的电路图。
图5为图3或图4所示的本申请的供电断线检测系统的传感器芯片的输出信号示意图。
图6所示为本申请的供电断线检测系统的一种电路框图。
图7为图6所示的本申请的供电断线先检测系统的传感器芯片断电时，控制器检测到的断线检测输出端处的电压信号示意图。
图8所示为本申请的供电断线检测系统的另一种电路框图。
图9为图8所示的本申请的供电断线检测系统的传感器芯片断电时，控制器检测到的断线检测输出端处的电压信号示意图。
图10为图6所示的本申请的供电断线检测系统的一个实施例的电路图。
图11为图8所示的本申请的传感器的供电断线检测系统的一个实施例的电路图。
具体实施方式
这里将详细地对示例性实施例进行说明，其示例表示在附图中。下面的描述涉及附图时，除非另有表示，不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本申请相一致的所有实施方式。相反，它们仅是与如所附权利要求书中所详述的、本申请的一些方面相一致的装置的例子。
在本申请使用的术语是仅仅出于描述特定实施例的目的，而非旨在限制本申请。除非另作定义，本申请使用的技术术语或者科学术语应当为本发明所属领域内具有一般技能的人士所理解的通常意义。本申请说明书以及权利要求书中使用的“第一”“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。同样，“一个”或者“一”等类似词语也不表示数量限制，而是表示存在至少一个。若仅指代“一个”时会再单独说明。“多个”或者“若干”表示两个及两个以上。除非另行指出，“前部”、“后部”、“下部”和/或“上部”等类似词语只是为了便于说明，而并非限于一个位置或者一种空间定向。“包括”或者“包含”等类似词语意指出现在“包括”或者“包含”前面的元件或者物件涵盖出现在“包括”或者“包含”后面列举的元件或者物件及其等同，并不排除其他元件或者物件。“连接”或者“相连”等类似的词语并非限定于物理的或者机械的连接，而且可以包括电性的连接，不管是直接的还是间接的。在本申请说明书和所附权利要求书中所使用的单数形式的“一种”、“所述”和“该”也旨在包括多数形式，除非上下文清楚地表示其他含义。还应当理解，本文中使用的术语“和/或”是指并包含一个或多个相关联的列出项目的任何或所有可能组合。
本申请提供的供电断线检测系统包括传感器芯片和与传感器芯片电连接的电源端和地端、供电信号输入端、断线检测电路及控制器。供电信号输入端用于与电源端电连接。断线检测电路与供电信号输入端电连接，且包括断线检测输出端。控制器包括检测端。检测端与断线检测输出端电连接，控制器通过检 测端检测断线检测电路输出的电信号，并根据电信号确定传感器的芯片与电源端或地端的通断状态。如此，通过在传感器芯片内设置断线检测电路，使得控制器通过检测断线检测电路输出的电信号，进而可识别出传感器的芯片与电源端或地端是否断开，从而可避免发生事故。
本申请还提供一种车辆系统，包括供电断线检测系统。
图1所示为本申请提供的供电断线检测系统1的传感器芯片2与电源端VDD、地端GND导通的电路图。图2为图1所示的本申请提供的供电断线检测系统1的传感器芯片2的输出信号示意图。
结合图1、图2所示，供电断线检测系统1包括电源端VDD、地端GND、传感器芯片2。传感器芯片2包括电源引脚3和地引脚4，其中电源引脚3与电源端VDD电连接，地引脚4与地端GND电连接。在传感器芯片2的电源引脚3与电源端VDD正常连接时，且传感器芯片2的地引脚4与地端GND正常连接时(如图1所示)，传感器芯片2工作正常，且输出端Vout输出正常的信号(如图2所示)，图2中斜线S1表示输出端Vout输出的电压。
图3所示为本申请提供的供电断线检测系统1的传感器芯片2与电源端VDD断开的电路图。图4所示为本申请提供的供电断线检测系统1的传感器芯片2与地端GND断开的电路图。图5为图3或图4所示的本申请提供的供电断线检测系统1的传感器芯片2的输出信号示意图。
结合图3-图5所示，当传感器芯片2的电源引脚3与电源端VDD断开后(如图3所示)，或传感器芯片2的地引脚4与地端GND断开后(如图4所示)，传感器芯片2则无法正常工作，相应输出异常信号(如图5所示)，图5中的曲线S2表示图3或图4中的传感器芯片2的输出端Vout输出的电压。然而，相关技术中，系统无法检测出传感器芯片2是否与电源端VDD或地端GND断开，也就是说无法检测出传感器芯片2输出的信号是否为异常信号。尤其是在安全性要求很高的车辆的传感器芯片领域，若传感器芯片2与电源端VDD或地端GND处于断开状态，则车辆系统会因无法识别传感器芯片2输出的是异常信号而造成严重的交通事故。
因此，本申请提供一种供电断线检测系统1，如图6所示。图6所示为本申请提供的供电断线检测系统1的一种电路框图。供电断线检测系统1还包括供电信号输入端6、断线检测电路7及控制器8。供电信号输入端6设于传感器芯片2内，用于与电源端VDD电连接。断线检测电路7设于传感器芯片2内，与供电信号输入端6电连接，且包括断线检测输出端9。控制器8包括检测端10。检测端10与断线检测输出端9电连接，用于检测断线检测电路7输出的电信号。进而，控制器8通过检测端10检测断线检测电路7输出的电信号，并根据该电信号确定传感器芯片2的电源引脚3与电源端VDD的通断状态，或者传感器芯片2的地引脚4与地端GND的通断状态。此实施例中，通过在传感器芯片2内设置断线检测电路7，使得控制器8通过检测断线检测电路7输出的电信号来判断传感器芯片2与电源端VDD或地端GND是否导通。该电信号包括第一电信号和第二信号。第一电信号是指断线检测输出端9输出的介于电源端VDD的电压和地端GND的电压之间的电信号，但不会很接近电源端VDD的电压和地端GND的电压，为正常信号。第二电信号是指断线检测输出端9输出的是电源端VDD的电压或地端GND的电压的电信号，为异常信号。当检测端10检测到断线检测输出端9输出的是介于电源端VDD的电压和地端GND的电压之间的电信号时，说明传感器芯片2的电源引脚3与电源端VDD正常连接，且地引脚4与地端GND正常连接，此时控制器8可确认传感器芯片2输出的信号为正常信号。当检测端10检测到断线检测输出端9输出的是电源端VDD的电压或地端GND的电压的电信号时，说明传感器芯片2的电源引脚3与电源端VDD断开或者传感器芯片2的地引脚4与地端GND断开，此时控制器8可确认传感器芯片2输出的信号为异常信号，进而车辆系统执行防护措施，可避免发生安全故障。
在一些实施例中，断线检测电路7包括检控电路11、供电信号传输电路12。
供电信号传输电路12包括第一端13、第二端14及第三端15，其中第一端13与检控电路11电连接，第二端14与供电信号输入端6电连接，第三端15与断线检测输出端9电连接。当传感器芯片2与电源端VDD、地端GND处于导通 状态时，检控电路11导通，且使供电信号传输电路12导通，从而使断线检测输出端9输出第一电信号，此时控制器8通过检测端10确认传感器芯片2的电源引脚3与电源端VDD电连接正常，以及地引脚4与地端GND电连接正常。当传感器芯片2与电源端VDD或地端GND处于断开状态时，检控电路11断开，且使供电信号传输电路12断开，从而使断线检测输出端9输出第二电信号，此时控制器8通过检测端10确认传感器芯片2的电源引脚3与电源端VDD断开或者地引脚4与地端GND断开，从而控制器8可识别传感器芯片2输出的信号为异常信号，进而车辆系统可执行防护措施，可避免发生安全故障。
图7为图6所示的本申请提供的供电断线先检测系统1的传感器芯片4断电时，控制器8检测到的断线检测输出端9处的电压信号示意图。结合图6、图7所示，在一些实施例中，断线检测电路7包括上拉电阻Rpu，上拉电阻Rpu的一端电连接于供电信号传输电路12的第三端15和控制器8之间，另一端与电源端VDD电连接。当传感器芯片2与电源端VDD或地端GND处于断开状态时，检控电路11使供电信号传输电路12断开，且通过上拉电阻Rpu将传输至断线检测输出端9的第二电信号上拉至高电平信号。此实施例中，当传感器芯片2的电源引脚3与电源端VDD断开时，此时检控电路11与供电信号传输电路12均处于无供电状态，上拉电阻Rpu将传输至断线检测输出端9的电压拉高至电源端VDD的电平(如图7所示)，图7中直线S3为此时的断线检测输出端9输出的电压。进而，控制器8的检测端10可检测到断线检测输出端9处的电压为电源端VDD电压，进一步控制器8可识别出传感器芯片2输出的电信号为异常信号。当传感器芯片2的地引脚4与地端GND断开时，此时整个传感器芯片2会处于地线悬空状态，且检控电路11使供电信号传输电路12为断开状态，这样上拉电阻Rpu可将传输至断线检测输出端9的电压拉高至电源端VDD的电平。同理，控制器8的检测端10可检测到断线检测输出端9处的电压为电源端VDD电压，进一步控制器8可识别出传感器芯片2输出的信号为异常信号。如此，车辆系统提前执行防护措施，可避免发生安全故障。
图8所示为本申请的供电断线检测系统1的另一种电路框图。图9为图8 所示的本申请提供的供电断线检测系统1的传感器芯片4断电时，控制器8检测到的断线检测输出端处9的电压信号示意图。结合图8、图9所示，断线检测电路7包括下拉电阻Rpd，下拉电阻Rpd的一端电连接于供电信号传输电路12的第三端15和控制器8之间，另一端与地端GND电连接。当传感器芯片2与电源端VDD或地端GND处于断开状态时，检控电路11使供电信号传输电路12断开，并通过下拉电阻Rpd将传输至断线检测输出端9的第二电信号下拉至低电平信号。此实施例中，当传感器芯片2的电源引脚3与电源端VDD断开时，此时检控电路11与供电信号传输电路12均处于无供电状态，下拉电阻Rpd将传输至断线检测输出端9的电压下拉至地端GND的电平(如图9所示)，图9中直线S4为此时的断线检测输出端9输出的电压。进而，控制器8的检测端10可检测到断线检测输出端9处的电压为地端GND的电压，进一步控制器8可识别出传感器芯片2输出的信号为异常信号。当传感器芯片2的地引脚4与地端GND断开时，此时整个传感器芯片2会处于地线悬空状态，且检控电路11断开，也使供电信号传输电路12为断开状态，这样下拉电阻Rpd可将传输至断线检测输出端9的电压下拉至地端GND的电平。同理，控制器8的检测端10可检测到断线检测输出端9处的电压为地端GND的电压，进一步控制器8可识别出传感器芯片2输出的信号为异常信号。如此，车辆系统可提前执行防护措施，以避免发生安全故障。
图10为图6所示的本申请的供电断线检测系统1的一个实施例的电路图。如图10所示，检控电路11包括第一MOS管P1和第二MOS管P2。该第一MOS管P1和第二MOS管P2均为P型MOS管。供电信号传输电路12包括第三MOS管N1和第四MOS管N2。该第三MOS管N1和第四MOS管N2均为N型MOS管。第一MOS管P1的源极与电源端VDD电连接，第一MOS管P1的栅极与地端GND连接。第二MOS管P2的漏极与第一MOS管P1的漏极电连接，第二MOS管P2的栅极电连接第二MOS管P2的源极。第三MOS管N1的源极电连接供电信号输入端6，第三MOS管N1的栅极电连接于第一MOS管P1的漏极和第二MOS管P2的漏极之间。第四MOS管N2的漏极电连接第三MOS管 N1的漏极，第四MOS管N2的栅极电连接第二MOS管P2的源极，第四MOS管N2的源极电连接断线检测输出端9。当传感器芯片2与电源端VDD、地端GND处于导通状态时，第一MOS管P1导通，其流过的电流传输至第三MOS管N1的栅极，从而使第三MOS管N1导通，且通过第二MOS管P2传输至第四MOS管N2的栅极，从而使第四MOS管N2导通，如此，使断线检测输出端9输出第一电信号，表示传感器芯片2输出的信号为正常信号。当传感器芯片2与电源端VDD处于断开状态时，第一MOS管P1处于关断状态，进而使所述第三MOS管N1关断，且所述第二MOS管P2也处于关断状态，进而使所述第四MOS管N2关断，此时，通过上拉电阻Rpu可将传输至断线检测输出端9的电压拉高至电源端VDD的电平，如此，使断线检测输出端9输出第二电信号，表示传感器芯片2输出的信号为异常信号。
在一些实施例中，第一MOS管P1、第二MOS管P2、第三MOS管N1及第四MOS管N2均为高压MOS管，有利于允许较大电压通过。
在一些实施例中，检控电路11还包括第一电阻R1，第一电阻R1的一端电连接于第一MOS管P1的漏极和第三MOS管N1的栅极之间，另一端电连接第三MOS管N1的源极。当传感器芯片2与地端GND处于断开状态时，第一电阻R1使第三MOS管N1关断。此实施例中，断线检测输出端9电连接的是上拉电阻Rpu，且传感器芯片2与地端GND断开时，此时第一MOS管P1关断，但是由于上拉电阻Rpu的存在，会导致电路中的第一MOS管P1的漏极与第二MOS管P2的漏极之间存在电压，从而可能出现第三MOS管N1导通的状态，因此，通过在第三MOS管N1的栅极和源极之间短接第一电阻R1，从而使得第三MOS管N1关断，进而整个供电信号传输电路12处于无电状态，从而上拉电阻Rpu将传输至断线检测输出端9的电压信号拉至高电平信号，进而，控制器8的检测端10可检测到断线检测输出端9处的电压为电源端VDD电压，进一步控制器8可识别出传感器芯片2输出的信号为异常信号。
图11为图8所示的本申请的供电断线检测系统1的一个实施例的电路图。如图11所示，在一些实施例中，检控电路11还包括第二电阻R2，第二电阻R2 的一端电连接于第二MOS管P2的源极和第四MOS管N2的栅极之间，另一端电连接第四MOS管N2的源极。当传感器芯片2与地端GND处于断开状态时，第二电阻R2使第四MOS管N2关断。此实施例中，断线检测输出端9电连接的是下拉电阻Rpd，且传感器芯片2与地端GND断开时，此时第一MOS管P1关断，但是由于下拉电阻Rpd的存在，会导致电路中的第二MOS管P2的源极与第四MOS管N2的源极之间存在电压，从而可能出现第四MOS管N2导通的状态，因此，通过在第四MOS管N2的栅极和源极之间短接第二电阻R2，从而使得第四MOS管N2关断，进而断线检测输出端9处为无电状态，从而下拉电阻Rpd将传输至断线检测输出端9的信号下拉至低电平信号，进而，控制器8的检测端10可检测到断线检测输出端9处的电压为地端GND电压，进一步控制器8可识别出传感器芯片2输出的信号为异常信号。
在一些实施例中，检控电路11还包括电荷泵16，电荷泵16电连接于电源端VDD和第一MOS管P1的源极之间。该电荷泵16用于升高电源端VDD的电压，使输入到第一MOS管P1的电压高于电源端VDD电压3V。例如，电源端VDD的电压可以为5V，这样经过电荷泵16的升压后，输入到第一MOS管P1的源极的电压为8V，而第一MOS管P1的导通电压是7V，如此，有利于第一MOS管P1顺利导通。
如图6、图8所示，在一些实施例中，传感器1还包括缓冲器17，缓冲器17设于传感器芯片2内，且电连接于电源端VDD和供电信号输入端6之间。该缓冲器17用于驱动传输到供电信号传输电路12的电压信号，在传感器芯片2的电源引脚3与电源端VDD接通时，有利于供电信号传输电路12的第三MOS管N1的导通。
以上描述仅是本发明的一个具体实例，不构成对本发明的任何限制，显然对于本领域的技术人员来说，在了解了本发明内容和原理后，都可能在不背离本发明原理、结构的情况下，进行形式和细节上的各种修正和改变，但是这些基于本发明思想的修正和改变仍在本发明的权利要求保护范围之内。

Claims (10)

  1. 一种供电断线检测系统，其特征在于，包括：
    传感器芯片和与所述传感器芯片电连接的电源端和地端；
    供电信号输入端，设于所述传感器芯片内，用于与所述电源端电连接；
    断线检测电路，设于所述传感器芯片内，与所述供电信号输入端电连接，且包括断线检测输出端；及
    控制器，包括检测端，所述检测端与所述断线检测输出端电连接，所述控制器通过所述检测端检测所述断线检测电路输出的电信号，并根据所述电信号确定所述传感器芯片与所述电源端或所述地端的通断状态。
  2. 根据权利要求1所述的供电断线检测系统，其特征在于，所述电信号包括第一电信号和第二电信号；所述断线检测电路包括：
    检控电路；
    供电信号传输电路，包括第一端、第二端及第三端，其中所述第一端与所述检控电路电连接，所述第二端与所述供电信号输入端电连接，所述第三端与所述断线检测输出端电连接；
    当所述传感器芯片与所述电源端、所述地端处于导通状态时，所述检控电路使所述供电信号传输电路导通，从而使所述断线检测输出端输出所述第一电信号；
    当所述传感器芯片与所述电源端或所述地端处于断开状态时，所述检控电路使所述供电信号传输电路断开，从而使所述断线检测输出端输出所述第二电信号。
  3. 根据权利要求2所述的供电断线检测系统，其特征在于，所述断线检测电路包括上拉电阻，所述上拉电阻的一端电连接于所述供电信号传输电路的所述第三端和所述控制器之间，另一端与所述电源端电连接；
    当所述传感器芯片与所述电源端或所述地端处于断开状态时，所述检控电路使所述供电信号传输电路断开，并通过所述上拉电阻将传输至所述断线检测 输出端的所述第二电信号上拉至高电平信号；或
    所述断线检测电路包括下拉电阻，所述下拉电阻的一端电连接于所述供电信号传输电路的所述第三端和所述控制器之间，另一端与所述地端电连接；
    当所述传感器芯片与所述电源端或所述地端处于断开状态时，所述检控电路使所述供电信号传输电路断开，并通过所述下拉电阻将传输至所述断线检测输出端的所述第二电信号下拉至低电平信号。
  4. 根据权利要求2所述的供电断线检测系统，其特征在于，所述检控电路包括第一MOS管和第二MOS管；所述供电信号传输电路包括第三MOS管和第四MOS管；
    所述第一MOS管的源极与所述电源端电连接，所述第一MOS管的栅极与所述地端连接；所述第二MOS管的漏极与所述第一MOS管的漏极电连接，所述第二MOS管的栅极电连接所述第二MOS管的源极；所述第三MOS管的源极电连接所述供电信号输入端，所述第三MOS管的栅极电连接于所述第一MOS管的漏极和所述第二MOS管的漏极之间；所述第四MOS管的漏极电连接所述第三MOS管的漏极，所述第四MOS管的栅极电连接所述第二MOS管的源极，所述第四MOS管的源极电连接所述断线检测输出端；
    当所述传感器芯片与所述电源端、所述地端处于导通状态时，所述第一MOS管使所述第三MOS管导通，且所述第二MOS管使所述第四MOS管导通，从而使所述断线检测输出端输出所述第一电信号；
    当所述传感器芯片与所述电源端处于断开状态时，所述第一MOS管使所述所述第三MOS管关断，且所述第二MOS管使所述第四MOS管关断，从而使所述断线检测输出端输出所述第二电信号。
  5. 根据权利要求4所述的供电断线检测系统，其特征在于，所述检控电路还包括第一电阻，所述第一电阻的一端电连接于所述第一MOS管的漏极和所述第三MOS管的栅极之间，另一端电连接所述第三MOS管的源极；
    当所述传感器芯片与所述地端处于断开状态时，所述第一电阻使所述第三MOS管关断。
  6. 根据权利要求4所述的供电断线检测系统，其特征在于，所述检控电路还包括所述第二电阻，所述第二电阻的一端电连接于所述第二MOS管的源极和所述第四MOS管的栅极之间，另一端电连接所述第四MOS管的源极；
    当所述传感器芯片与所述地端处于断开状态时，所述第二电阻使所述第四MOS管关断。
  7. 根据权利要求4所述的供电断线检测系统，其特征在于，所述第一MOS管、所述第二MOS管、所述第三MOS管及所述第四MOS管均为高压MOS管。
  8. 根据权利要求4所述的供电断线检测系统，其特征在于，所述检控电路还包括电荷泵，所述电荷泵电连接于所述电源端和所述第一MOS管的源极之间。
  9. 根据权利要求1所述的供电断线检测系统，其特征在于，所述供电断线检测系统还包括缓冲器，所述缓冲器设于所述传感器芯片内，且电连接于所述电源端和所述供电信号输入端之间。
  10. 一种车辆系统，其特征在于，包括如上述权利要求1-9任一项所述的供电断线检测系统。
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