Monitoring system and method for multiple control units

Abstract

The invention discloses a monitoring system and method for multiple control units, and relates to the technical field of monitoring circuits, the monitoring system comprises a controller and N monitoring circuits, the N monitoring circuits are connected in series and connected with the controller, and each monitoring circuit comprises a distinguishing resistor and a switch assembly which are connected in sequence, the distinguishing resistors of the N monitoring circuits are resistors with resistance values of different orders of magnitude, one monitoring circuit correspondingly monitors one detected control unit, the switch assembly is connected with the detected control unit and is used for acting according to the working state of the detected control unit, and the controller is connected with the distinguishing resistors and the switch assembly and is used for controlling the working state of the detected control unit. The controller is connected with the N monitoring circuits in series and is configured to collect the resistance values of the N monitoring circuits in series, when the resistance values of the N monitoring circuits in series are the same as a certain preset resistance value, alarm information is sent, each control unit does not need to be connected with the controller, a connecting pin does not need to be reserved for each control unit, I / O pin resources of the controller are saved, and the use cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of monitoring circuits, and particularly relates to a monitoring system and method for multiple control units. Background Art

[0002] In an automotive electronic and electrical control system, each control unit is responsible for performing a specific function, executing a specific task, and outputting different control information. A complex system relies on multiple control units to work together. Therefore, monitoring each control unit is the cornerstone of system reliability, safety, and economy. It not only ensures immediate risk prevention and control but also enables rapid diagnosis and precise maintenance.

[0003] In the prior art, multiple control units are respectively connected to a controller to monitor the states of different control units. However, the method of respectively connecting multiple control units to the controller requires reserved connection pins for each control unit, which greatly occupies the I / O pin resources of the controller and leads to a shortage in the use of the controller's I / O pins. Summary of the Invention

[0004] Embodiments of the present invention provide a monitoring system and method for multiple control units to solve the technical problem in the related art that the existing method of respectively connecting multiple control units to a controller greatly occupies the I / O pin resources of the controller, resulting in a shortage in the use of the controller's I / O pins.

[0005] In a first aspect, a monitoring system for multiple control units is provided, including:

[0006] A controller and N monitoring circuits. The N monitoring circuits are connected in series and connected to the controller. Each monitoring circuit includes: a resolution resistor and a switch component connected in sequence;

[0007] The resolution resistors of the N monitoring circuits are resistors with different order-of-magnitude resistances. One monitoring circuit corresponds to monitoring one measured control unit;

[0008] The switch component is connected to the measured control unit and is configured to act according to the working state of the measured control unit;

[0009] The controller is connected to the resolution resistor and the switch component and is configured to:

[0010] Collect the resistances of the N monitoring circuits connected in series, and send an alarm message when the resistances of the N monitoring circuits connected in series are the same as a certain preset resistance.

[0011] In some embodiments, the switch component includes:

[0012] A working state sensing switch, the working state sensing switch is provided with two contacts, and the working state sensing switch is connected to the controlled unit to be measured, and is used to select any one of the contacts to conduct according to the working state of the controlled unit to be measured;

[0013] An alarm state sensing switch, the alarm state sensing switch is provided with two contacts, and the alarm state sensing switch is connected to the controlled unit to be measured, and is used to select any one of the contacts to conduct according to the alarm state of the controlled unit to be measured.

[0014] In some embodiments, there are five monitoring circuits. The resistance value of the resolution resistor of the first monitoring circuit is R, the resistance value of the resolution resistor of the second monitoring circuit is 2R, the resistance value of the resolution resistor of the third monitoring circuit is 10R, the resistance value of the resolution resistor of the fourth monitoring circuit is 15R, and the resistance value of the resolution resistor of the fifth monitoring circuit is 30R.

[0015] In some embodiments, when the resistance values of N series-connected monitoring circuits are collected and the resistance values of the N series-connected monitoring circuits are the same as a certain preset resistance value, an alarm message is sent, including:

[0016] When the resistance value of the N series-connected monitoring circuits collected is R, the first controlled unit to be measured is in the working state and the alarm state. The second contact of the working state sensing switch of the first monitoring circuit conducts, and the first contact of the alarm state sensing switch conducts. The controller sends the alarm message of the first controlled unit to be measured.

[0017] In some embodiments, when the resistance values of N series-connected monitoring circuits are collected and the resistance values of the N series-connected monitoring circuits are the same as a certain preset resistance value, an alarm message is sent, and it further includes:

[0018] When the resistance value of the N series-connected monitoring circuits collected is the sum of R and 2R, the controller sends the alarm messages of the first controlled unit to be measured and the second controlled unit to be measured.

[0019] In some embodiments, when the resistance values of N series-connected monitoring circuits are collected and the resistance values of the N series-connected monitoring circuits are the same as a certain preset resistance value, an alarm message is sent, and it further includes:

[0020] When the resistance value of the N series-connected monitoring circuits collected is the sum of R, 2R, and 10R, the controller sends the alarm messages of the first controlled unit to be measured, the second controlled unit to be measured, and the third controlled unit to be measured.

[0021] In some embodiments, when the resistance values of N series-connected monitoring circuits are collected and the resistance values of the N series-connected monitoring circuits are the same as a certain preset resistance value, an alarm message is sent, and it further includes:

[0022] When the sum of the resistances of the N monitoring circuits connected in series is R + 2R + 10R + 15R, the controller sends the alarm information of the first controlled unit under test, the second controlled unit under test, the third controlled unit under test, and the fourth controlled unit under test.

[0023] In some embodiments, when collecting the resistances of the N monitoring circuits connected in series, and sending alarm information when the sum of the resistances of the N monitoring circuits connected in series is the same as a certain preset resistance value, it further includes:

[0024] When the sum of the resistances of the N monitoring circuits connected in series is R + 2R + 10R + 15R + 30R, the controller sends the alarm information of the first controlled unit under test, the second controlled unit under test, the third controlled unit under test, the fourth controlled unit under test, and the fifth controlled unit under test.

[0025] In some embodiments, when collecting the resistances of the N monitoring circuits connected in series, and sending alarm information when the sum of the resistances of the N monitoring circuits connected in series is the same as a certain preset resistance value, it further includes:

[0026] When the sum of the resistances of the N monitoring circuits connected in series is R + 2R + 15R + 30R, the controller sends the alarm information of the first controlled unit under test, the second controlled unit under test, the fourth controlled unit under test, and the fifth controlled unit under test.

[0027] In a second aspect, a monitoring method for multiple control units is provided, using the aforementioned multiple control unit monitoring system, including:

[0028] Collecting the resistances of the N monitoring circuits connected in series, and sending alarm information when the sum of the resistances of the N monitoring circuits connected in series is the same as a certain preset resistance value.

[0029] The beneficial effects brought by the technical solution provided by the present invention include:

[0030] An embodiment of the present invention provides a monitoring system and method for multiple control units. The monitoring system for multiple control units includes: a controller and N monitoring circuits. The N monitoring circuits are connected in series and connected to the controller. Each of the monitoring circuits includes: a resolution resistor and a switch component connected in sequence. The resolution resistors of the N monitoring circuits are resistors with different order-of-magnitude resistances. One monitoring circuit corresponds to monitoring one measured control unit. The switch component is connected to the measured control unit and is configured to act according to the working state of the measured control unit. The controller is connected to the resolution resistor and the switch component, and is configured to collect the resistance values of the N monitoring circuits connected in series, and send an alarm message when the resistance values of the N monitoring circuits connected in series are the same as a certain preset resistance value. By connecting the input and output ports of the N monitoring circuits connected in series to the controller, N control units can be monitored simultaneously, without connecting each control unit to the controller separately, and without reserving connection pins for each control unit, saving the I / O pin resources of the controller and reducing the usage cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0032] Figure 1 It is a schematic diagram of a monitoring system for multiple control units provided by an embodiment of the present invention;

[0033] Figure 2 It is a schematic diagram of a working state of a monitoring circuit provided by an embodiment of the present invention;

[0034] Figure 3 It is a schematic diagram of another working state of a monitoring circuit provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0036] The embodiment of the present invention provides a monitoring system and method for multiple control units, which can solve the technical problem in the related art that the existing method of connecting multiple control units to a controller respectively occupies a large amount of I / O pins of the controller, resulting in a shortage of the use of the I / O pins of the controller.

[0037] Figure 1 A monitoring system for multiple control units provided by an embodiment of the present invention includes: a controller and N monitoring circuits. The N monitoring circuits are connected in series and connected to the controller. Each of the monitoring circuits includes: a resolution resistor and a switch component connected in sequence. The resolution resistors of the N monitoring circuits are resistors with different order-of-magnitude resistances. One monitoring circuit corresponds to monitoring one to-be-measured control unit. The switch component is connected to the to-be-measured control unit and is configured to act according to the working state of the to-be-measured control unit. The controller is connected to the resolution resistor and the switch component, and is configured to: collect the resistances of the N monitoring circuits connected in series, and send an alarm message when the resistances of the N monitoring circuits connected in series are the same as a certain preset resistance.

[0038] The monitoring system for multiple control units provided by the embodiment of the present invention is provided with a controller and N monitoring circuits. The N monitoring circuits are connected in series and connected to the controller. Each of the monitoring circuits includes: a resolution resistor and a switch component connected in sequence. The resolution resistors of the N monitoring circuits are resistors with different order-of-magnitude resistances. One monitoring circuit corresponds to monitoring one to-be-measured control unit. The switch component is connected to the to-be-measured control unit and is configured to act according to the working state of the to-be-measured control unit. The controller is connected to the resolution resistor and the switch component, and is configured to: collect the resistances of the N monitoring circuits connected in series, and send an alarm message when the resistances of the N monitoring circuits connected in series are the same as a certain preset resistance. After the N monitoring circuits are connected in series, only by connecting the input and output of the N monitoring circuits connected in series to the controller, the working states of the N control units can be monitored simultaneously and an alarm message can be sent, without connecting each control unit to the controller respectively, nor reserving connection pins for each control unit, saving the I / O pin resources of the controller and reducing the use cost.

[0039] As an optional implementation manner, in an embodiment of the invention, refer to Figure 1As shown, the switch assembly includes: a working state sensing switch and an alarm state sensing switch. The working state sensing switch has two contacts. The working state sensing switch is connected to the control unit under test and is used to select any one of the contacts to conduct according to the working state of the control unit under test. The alarm state sensing switch has two contacts. The alarm state sensing switch is connected to the control unit under test and is used to select any one of the contacts to conduct according to the alarm state of the control unit under test; when the control unit under test is in the working state, the second contact of the working state sensing switch, i.e., the third and fourth contacts, conduct. When the control unit under test is in the non-working state, the first contact of the working state sensing switch, i.e., the first and second contacts, conduct; only when the control unit under test is in the working state, the alarm state sensing switch monitors the alarm state of the control unit under test. When the control unit under test is in the alarm state, the first contact of the alarm state sensing switch, i.e., the first and second contacts, conduct. When the control unit under test is in the non-alarm state, the second contact of the alarm state sensing switch, i.e., the third and fourth contacts, conduct. When the second contact of the alarm state sensing switch, i.e., the third and fourth contacts, conduct, the resolution resistor corresponding to the monitoring circuit is short-circuited and no alarm information needs to be sent.

[0040] Specifically, referring to Figure 2 and Figure 3 As shown, the working state sensing switch S1 is used to monitor whether there is a person on the car seat. The alarm state sensing switch S10 is used to monitor whether the seat belt is fastened. When there is a person on the seat, the second contact of the working state sensing switch S1 conducts, i.e., the third and fourth contacts conduct. And if the seat belt is not fastened, the first contact of the alarm state sensing switch S10, i.e., the first and second contacts, conduct. At this time, the resolution resistor of the corresponding monitoring circuit is connected in series into the circuit. The controller collects the resistance value of the resolution resistor and sends the alarm information of the seat; when there is a person on the seat and the seat belt is fastened, the second contact of the alarm state sensing switch S10, i.e., the third and fourth contacts, conduct. At this time, the resolution resistor of the monitoring circuit is short-circuited and the controller does not send alarm information; when there is no person on the seat, the first contact of the working state sensing switch S1, i.e., the first and second contacts, conduct. The alarm state sensing switch S10 does not need to monitor whether the seat belt is fastened and its second contact, i.e., the third and fourth contacts, conduct. The controller does not send alarm information.

[0041] As an alternative embodiment, in an invention embodiment, referring to Figure 1As shown, there are five monitoring circuits. The resistance value of the resolution resistor of the first monitoring circuit is R, the resistance value of the resolution resistor of the second monitoring circuit is 2R, the resistance value of the resolution resistor of the third monitoring circuit is 10R, the resistance value of the resolution resistor of the fourth monitoring circuit is 15R, and the resistance value of the resolution resistor of the fifth monitoring circuit is 30R. The resistance values of the resolution resistors of each monitoring circuit are different, and the different resistance values of the resolution resistors are used to distinguish different measured control units. The controller compares the collected resistance value with the preset resistance value, and when the collected resistance value is the same as a certain preset resistance value, it sends the alarm information of its corresponding measured control unit.

[0042] As an optional implementation manner, in an embodiment of the invention, refer to Figure 1 , Figure 2 and Figure 3 As shown, the resistance values of the N monitoring circuits connected in series are collected, and when the resistance values of the N monitoring circuits connected in series are the same as a certain preset resistance value, an alarm message is sent. It further includes: when the resistance value of the N monitoring circuits connected in series is R, the first measured control unit is in the working state and the alarm state. The second contact of the working state sensing switch S1 of the first monitoring circuit is turned on, that is, the third and fourth contacts are turned on. The first contact of the alarm state sensing switch S10 of the first monitoring circuit, that is, the first and second contacts are turned on. The controller sends the alarm information of the first measured control unit. The first contacts of the working state sensing switches of the remaining monitoring circuits are turned on, that is, the first and second contacts are turned on. The second contacts of the alarm state sensing switches of the remaining monitoring circuits, that is, the third and fourth contacts are turned on.

[0043] Specifically, the working state sensing switch S1 is used to monitor whether there is someone in the first seat of the car, and the alarm state sensing switch S10 is used to monitor whether the first seat is fastened with a seat belt. When there is someone in the first seat, the second contact of the working state sensing switch S1 is turned on, that is, the third and fourth contacts are turned on, and the first seat is not fastened with a seat belt, then the first contact of the alarm state sensing switch S10, that is, the first and second contacts are turned on, and the controller sends the alarm information of the first seat; when there is someone in the first seat and the first seat is fastened with a seat belt, then the second contact of the alarm state sensing switch S10, that is, the third and fourth contacts are turned on, and at this time the resolution resistor R1 is short-circuited, and the controller does not send alarm information; when there is no one in the first seat, the first contact of the working state sensing switch S1, that is, the first and second contacts are turned on, and the second contact of the alarm state sensing switch S10, that is, the third and fourth contacts are turned on, and the controller does not send alarm information; when the resistance value of the N monitoring circuits connected in series is R, then there is someone in the first seat and not fastened with a seat belt, and the controller sends the alarm information of the first seat, and there is no one in the remaining seats.

[0044] As an alternative embodiment, in an inventive embodiment, refer to Figure 1 As shown, when collecting the resistance values of the N monitoring circuits connected in series, an alarm message is sent when the resistance values of the N monitoring circuits connected in series are the same as a certain preset resistance value. It further includes: when the sum of the resistance values of the N monitoring circuits connected in series is R + 2R, the controller sends alarm messages for the first and second controlled units under test. At this time, the working state sensing switch S1 monitors that there is someone in the first seat of the vehicle, the working state sensing switch S2 monitors that there is someone in the second seat, the second contacts of the working state sensing switches S1 and S2 are conducting, i.e., both the third and fourth contacts are conducting, the alarm state sensing switch S10 monitors that the first seat is not fastened with a seat belt, the alarm state sensing switch S20 monitors that the second seat is not fastened with a seat belt, the first contacts of the alarm state sensing switches S10 and S20, i.e., both the first and second contacts are conducting, and the controller sends alarm messages for the first and second seats.

[0045] As an alternative embodiment, in an inventive embodiment, refer to Figure 1 As shown, when collecting the resistance values of the N monitoring circuits connected in series, an alarm message is sent when the resistance values of the N monitoring circuits connected in series are the same as a certain preset resistance value. It further includes: when the sum of the resistance values of the N monitoring circuits connected in series is R + 2R + 10R, the controller sends alarm messages for the first, second, and third controlled units under test. At this time, the working state sensing switch S1 monitors that there is someone in the first seat of the vehicle, the working state sensing switch S2 monitors that there is someone in the second seat, the working state sensing switch S3 monitors that there is someone in the third seat of the vehicle, the second contacts of the working state sensing switches S1, S2, and S3 are conducting, i.e., both the third and fourth contacts are conducting, the alarm state sensing switch S10 monitors that the first seat is not fastened with a seat belt, the alarm state sensing switch S20 monitors that the second seat is not fastened with a seat belt, the alarm state sensing switch S30 monitors that the third seat is not fastened with a seat belt, the first contacts of the alarm state sensing switches S10, S20, and S30, i.e., both the first and second contacts are conducting, and the controller sends alarm messages for the first, second, and third seats.

[0046] As an alternative embodiment, in an inventive embodiment, refer to Figure 1As shown, when the resistance values of N monitoring circuits connected in series are collected, and when the resistance values of the N monitoring circuits connected in series are the same as a certain preset resistance value, an alarm message is sent. It also includes: when the sum of the resistance values of the N monitoring circuits connected in series is R + 2R + 10R + 15R, the controller sends alarm messages for the first measured control unit, the second measured control unit, the third measured control unit, and the fourth measured control unit. At this time, the working state sensing switch S1 monitors that there is someone in the first seat of the vehicle, the working state sensing switch S2 monitors that there is someone in the second seat, the working state sensing switch S3 monitors that there is someone in the third seat of the vehicle, and the working state sensing switch S4 monitors that there is someone in the fourth seat of the vehicle. The second contacts of the working state sensing switches S1, S2, S3, and S4 are conducting, that is, both the third and fourth contacts are conducting. The alarm state sensing switch S10 monitors that the seat belt is not fastened for the first seat, the alarm state sensing switch S20 monitors that the seat belt is not fastened for the second seat, the alarm state sensing switch S30 monitors that the seat belt is not fastened for the third seat, and the alarm state sensing switch S40 monitors that the seat belt is not fastened for the fourth seat. The first contacts of the alarm state sensing switches S10, S20, S30, and S40, that is, both the first and second contacts are conducting, and the controller sends alarm messages for the first seat, the second seat, the third seat, and the fourth seat.

[0047] As an alternative implementation, in an embodiment of the invention, refer to Figure 1As shown, the resistance values of N monitoring circuits connected in series are collected, and an alarm message is sent when the resistance values of the N monitoring circuits connected in series are the same as a preset resistance value. It further includes: when the sum of the resistance values of the N monitoring circuits connected in series is R + 2R + 10R + 15R + 30R, the controller sends alarm messages for the first controlled unit under test, the second controlled unit under test, the third controlled unit under test, the fourth controlled unit under test, and the fifth controlled unit under test. At this time, the working state sensing switch S1 monitors that there is someone in the first seat of the vehicle, the working state sensing switch S2 monitors that there is someone in the second seat, the working state sensing switch S3 monitors that there is someone in the third seat of the vehicle, the working state sensing switch S4 monitors that there is someone in the fourth seat of the vehicle, the working state sensing switch S5 monitors that there is someone in the fifth seat of the vehicle. The second contacts of the working state sensing switches S1, S2, S3, S4, and S5 are turned on, that is, both the third and fourth contacts are turned on. The alarm state sensing switch S10 monitors that the seat belt is not fastened in the first seat, the alarm state sensing switch S20 monitors that the seat belt is not fastened in the second seat, the alarm state sensing switch S30 monitors that the seat belt is not fastened in the third seat, the alarm state sensing switch S40 monitors that the seat belt is not fastened in the fourth seat, the alarm state sensing switch S50 monitors that the seat belt is not fastened in the fifth seat. The first contacts of the alarm state sensing switches S10, S20, S30, S40, and S50, that is, both the first and second contacts are turned on, and the controller sends alarm messages for the first seat, the second seat, the third seat, the fourth seat, and the fifth seat.

[0048] As an optional implementation manner, in an embodiment of the invention, refer to Figure 1As shown, the resistance values of the N monitoring circuits connected in series are collected, and an alarm message is sent when the resistance values of the N monitoring circuits connected in series are the same as a certain preset resistance value. It also includes: when the sum of the resistance values of the N monitoring circuits connected in series is R + 2R + 15R + 30R, the controller sends alarm messages for the first controlled unit under test, the second controlled unit under test, the fourth controlled unit under test, and the fifth controlled unit under test. At this time, the working state sensing switch S1 monitors that there is someone in the first seat of the vehicle, the working state sensing switch S2 monitors that there is someone in the second seat, the working state sensing switch S4 monitors that there is someone in the fourth seat of the vehicle, and the working state sensing switch S5 monitors that there is someone in the fifth seat of the vehicle. The second contacts of the working state sensing switches S1, S2, S4, and S5 are conducting, that is, both the third and fourth contacts are conducting. The alarm state sensing switch S10 monitors that the first seat is not fastened with a seat belt, the alarm state sensing switch S20 monitors that the second seat is not fastened with a seat belt, the alarm state sensing switch S40 monitors that the fourth seat is not fastened with a seat belt, and the alarm state sensing switch S50 monitors that the fifth seat is not fastened with a seat belt. The first contacts of the alarm state sensing switches S10, S20, S40, and S50, that is, both the first and second contacts are conducting, and the controller sends alarm messages for the first seat, the second seat, the fourth seat, and the fifth seat.

[0049] Among them, the N monitoring circuits connected in series can be arbitrarily combined. When the sum of the resistance values of the N monitoring circuits connected in series is R + 10R + 30R, the working state sensing switch S1 monitors that there is someone in the first seat of the vehicle, the working state sensing switch S3 monitors that there is someone in the third seat, and the working state sensing switch S5 monitors that there is someone in the fifth seat of the vehicle. The second contacts of the working state sensing switches S1, S3, and S5 are conducting, that is, both the third and fourth contacts are conducting. The alarm state sensing switch S10 monitors that the first seat is not fastened with a seat belt, the alarm state sensing switch S30 monitors that the third seat is not fastened with a seat belt, and the alarm state sensing switch S50 monitors that the fifth seat is not fastened with a seat belt. The first contacts of the alarm state sensing switches S10, S30, and S50, that is, both the first and second contacts are conducting, and the controller sends alarm messages for the first seat, the third seat, and the fifth seat.

[0050] When the sum of the resistances of N series-connected monitoring circuits is R, 2R, and 15R, the working state sensing switch S1 monitors that there is someone in the first seat of the vehicle, the working state sensing switch S2 monitors that there is someone in the second seat, and the working state sensing switch S4 monitors that there is someone in the fourth seat of the vehicle. The second contacts of the working state sensing switches S1, S2, and S4 are turned on, that is, both the third and fourth contacts are turned on. The alarm state sensing switch S10 monitors that the seat belt is not fastened in the first seat, the alarm state sensing switch S20 monitors that the seat belt is not fastened in the second seat, and the alarm state sensing switch S40 monitors that the seat belt is not fastened in the fourth seat. The first contacts of the alarm state sensing switches S10, S20, and S40, that is, both the first and second contacts are turned on, and the controller sends alarm information about the first seat, the second seat, and the fourth seat.

[0051] And so on, N series-connected monitoring circuits can be arbitrarily combined. Each monitoring circuit corresponds to monitoring a control unit, that is, the state of a vehicle seat. The controller can identify and send alarm information corresponding to the measured control unit according to the resistance value of the arbitrarily combined series-connected monitoring circuits. Among them, the resistance values of the N resolution resistors corresponding to the N monitoring circuits and the order-of-magnitude relationship between the resistance values of each resolution resistor can be arbitrarily adjusted according to the usage requirements.

[0052] As an optional implementation manner, in an embodiment of the invention, refer to Figure 1 As shown, when collecting the resistance values of N series-connected monitoring circuits and sending alarm information when the resistance values of the N series-connected monitoring circuits are the same as a certain preset resistance value, it further includes: when the resistance values of the N series-connected monitoring circuits collected by the controller are 0 ohms, then none of the N measured control units are in the working state or the alarm state. The first contact of the working state sensing switch of each monitoring circuit is turned on, and the second contact of the alarm state sensing switch is turned on. The controller does not send alarm information. At this time, the working state sensing switch S1 monitors that there is no one in the first seat of the vehicle, the working state sensing switch S2 monitors that there is no one in the second seat, the working state sensing switch S3 monitors that there is no one in the third seat of the vehicle, the working state sensing switch S4 monitors that there is no one in the fourth seat of the vehicle, the working state sensing switch S5 monitors that there is no one in the fifth seat of the vehicle. The first contacts of the working state sensing switches S1, S2, S3, S4, and S5, that is, both the first and second contacts are turned on. The alarm state sensing switch does not need to monitor whether the seat belt is fastened, then the second contacts of the alarm state sensing switches S10, S20, S30, S40, and S50, that is, both the third and fourth contacts are turned on, and the controller does not send alarm information about the first seat, the second seat, the third seat, the fourth seat, and the fifth seat.

[0053] An embodiment of the present invention further provides a monitoring method for multiple control units, which uses the aforementioned multiple control unit monitoring system and includes: collecting the resistance values of N series-connected monitoring circuits, and sending an alarm message when the resistance values of the N series-connected monitoring circuits are the same as a certain preset resistance value.

[0054] In the monitoring method for multiple control units according to the embodiment of the present invention, by connecting N monitoring circuits in series, only the input and output of the N series-connected monitoring circuits need to be connected to the controller, and the working states of N control units can be monitored simultaneously and an alarm message can be sent. There is no need to connect each control unit to the controller separately, nor to reserve connection pins for each control unit, saving the I / O pin resources of the controller and reducing the usage cost.

[0055] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0056] It should be noted that in the present invention, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0057] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather will conform to the widest scope consistent with the principles and novel features of the invention herein.

Claims

1. A monitoring system with multiple control units, characterized in that, Including: A controller and N monitoring circuits. The N monitoring circuits are connected in series and connected to the controller. Each of the monitoring circuits includes: a resolution resistor and a switch component connected in sequence; The resolution resistors of the N monitoring circuits are resistors with different order-of-magnitude resistances. One monitoring circuit corresponds to monitoring one controlled unit under test; The switch component is connected to the controlled unit under test and is configured to act according to the working state of the controlled unit under test; The controller is connected to the resolution resistor and the switch component and is configured to: Collect the resistances of the N monitoring circuits connected in series, and send an alarm message when the resistances of the N monitoring circuits connected in series are the same as a certain preset resistance.

2. The monitoring system with multiple control units according to claim 1, characterized in that, The switch component includes: A working state sensing switch. The working state sensing switch has two contacts. The working state sensing switch is connected to the controlled unit under test and is used to select any one of the contacts to conduct according to the working state of the controlled unit under test; An alarm state sensing switch. The alarm state sensing switch has two contacts. The alarm state sensing switch is connected to the controlled unit under test and is used to select any one of the contacts to conduct according to the alarm state of the controlled unit under test.

3. The monitoring system for multiple controlled units according to claim 2, wherein: There are five monitoring circuits. The resistance of the resolution resistor of the first monitoring circuit is R, the resistance of the resolution resistor of the second monitoring circuit is 2R, the resistance of the resolution resistor of the third monitoring circuit is 10R, the resistance of the resolution resistor of the fourth monitoring circuit is 15R, and the resistance of the resolution resistor of the fifth monitoring circuit is 30R.

4. The monitoring system of multiple control units according to claim 3, characterized in that, The step of collecting the resistances of the N monitoring circuits connected in series and sending an alarm message when the resistances of the N monitoring circuits connected in series are the same as a certain preset resistance includes: When the resistance of the N monitoring circuits connected in series collected is R, the first controlled unit under test is in the working state and the alarm state. The second contact of the working state sensing switch of the first monitoring circuit conducts, and the first contact of the alarm state sensing switch conducts. The controller sends the alarm message of the first controlled unit under test.

5. The monitoring system of multiple control units according to claim 3, characterized in that, The step of collecting the resistances of the N monitoring circuits connected in series and sending an alarm message when the resistances of the N monitoring circuits connected in series are the same as a certain preset resistance further includes: When the resistance of the N monitoring circuits connected in series collected is the sum of R and 2R, the controller sends the alarm messages of the first controlled unit under test and the second controlled unit under test.

6. The monitoring system with multiple control units according to claim 3, characterized in that, The step of collecting the resistances of the N monitoring circuits connected in series and sending an alarm message when the resistances of the N monitoring circuits connected in series are the same as a certain preset resistance further includes: When the resistance of the N monitoring circuits connected in series collected is the sum of R, 2R, and 10R, the controller sends the alarm messages of the first controlled unit under test, the second controlled unit under test, and the third controlled unit under test.

7. The monitoring system of multiple control units according to claim 3, characterized in that, The step of collecting the resistances of the N monitoring circuits connected in series and sending an alarm message when the resistances of the N monitoring circuits connected in series are the same as a certain preset resistance further includes: When the sum of the resistances of the N monitoring circuits connected in series is R + 2R + 10R + 15R, the controller sends the alarm information of the first controlled unit under test, the second controlled unit under test, the third controlled unit under test, and the fourth controlled unit under test.

8. The monitoring system of multiple control units according to claim 3, characterized in that, The step of collecting the resistances of the N monitoring circuits connected in series and sending alarm information when the sum of the resistances of the N monitoring circuits connected in series is the same as a certain preset resistance value further includes: When the sum of the resistances of the N monitoring circuits connected in series is R + 2R + 10R + 15R + 30R, the controller sends the alarm information of the first controlled unit under test, the second controlled unit under test, the third controlled unit under test, the fourth controlled unit under test, and the fifth controlled unit under test.

9. The monitoring system with multiple control units according to claim 3, characterized in that, The step of collecting the resistances of the N monitoring circuits connected in series and sending alarm information when the sum of the resistances of the N monitoring circuits connected in series is the same as a certain preset resistance value further includes: When the sum of the resistances of the N monitoring circuits connected in series is R + 2R + 15R + 30R, the controller sends the alarm information of the first controlled unit under test, the second controlled unit under test, the fourth controlled unit under test, and the fifth controlled unit under test.

10. A monitoring method for multiple control units, using the multiple control unit monitoring system described in claim 1, characterized in that, It includes: Collecting the resistances of the N monitoring circuits connected in series and sending alarm information when the sum of the resistances of the N monitoring circuits connected in series is the same as a certain preset resistance value.

Images