A current-voltage monitoring and detecting system for a car central armrest box

Abstract

A kind of current voltage monitoring detection system of automobile central armrest box, it is characterized by being provided with n monitor U2, each described monitor U2 is connected with a detection module, each described detection module is provided with a current detection circuit, a voltage detection circuit, a position detection circuit and a control starting circuit;The control starting circuit is connected with the current detection circuit and voltage detection circuit through double-pole relay J1, and the monitoring end of the monitor U2 is connected with the voltage detection circuit, current detection circuit and position detection circuit through relay switch group J2-J4.Effect: using parallel detection mode to realize the current, voltage detection of each component, even if increasing detection item also will not increase overall detection time, greatly shorten product detection time, improve production efficiency;At the same time, increase the position sensor detection channel, without additional acquisition module, with higher integration, reduce detection cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic detection, in particular to a current and voltage monitoring and detection system for a central armrest box of an automobile. BACKGROUND

[0002] In the past, detection of the wire harness after installation of the central armrest box adopts a multimeter plus a relay, etc., to measure the resistance values of various components after installation to confirm whether the wire harness and electronic components are in place, whether they are working normally, and whether the electrical parameters meet the requirements.

[0003] However, it has many disadvantages:

[0004] 1) The on-off test needs to be tested by a multimeter in cooperation with a relay switch, and the multimeter reacts slowly and can only test one item before testing the next item, which will cause the overall test time to be relatively long, adversely affecting production.

[0005] 2) The internal resistance values of different batches of components are different, and the detection of resistance values will misjudge the qualified products as defective products.

[0006] 3) The relay used for switching has a service life limit, and long-term use will cause failure.

[0007] The above several detection methods cannot well meet the actual needs of production testing, and thus it is difficult to ensure the qualified rate of products. SUMMARY

[0008] The current and voltage monitoring and detection system for a central armrest box of an automobile provided by the present application can improve detection efficiency and shorten detection time.

[0009] To achieve the above-mentioned purpose, the current and voltage monitoring and detection system for a central armrest box of an automobile provided by the present application is characterized in that: n monitors U2 are arranged, each monitor U2 is connected with a detection module, and each detection module is provided with a current detection circuit, a voltage detection circuit, a position detection circuit and a control starting circuit.

[0010] The control starting circuit is connected with the current detection circuit and the voltage detection circuit through a double-throw relay J1, and the monitoring end of the monitor U2 is connected with the voltage detection circuit, the current detection circuit and the position detection circuit through a relay switch group J2-J4.

[0011] The control starting circuit is provided with a resistor R1, the front end of the resistor R1 is used for acquiring a detection instruction, the back end of the resistor R1 is connected with the base of a NPN type triode Q1, the emitter of the triode Q1 is connected with the ground through a resistor R3, the collector is connected with the negative input end of a solid state relay U1, the positive input end of the solid state relay U1 is connected with a 5V power supply, the positive output end of the solid state relay U1 is connected with the positive power supply through a gear combination resistor, the negative output end of the solid state relay U1 is connected with the input end of the double throw relay J1, the first output end of the double throw relay J1 is connected with the current detection circuit, and the second output end of the double throw relay J1 is connected with the voltage detection circuit;

[0012] The current detection circuit is provided with a recovery fuse F1, the front end of the recovery fuse F1 is connected with the first output end of the double throw relay J1, the back end of the recovery fuse F1 is connected with the front end of a sampling resistor R19, the back end of the sampling resistor R19 is connected with a load, the two ends of the sampling resistor R19 are also connected with the input end of a current sensing amplifier U7 in a corresponding connection mode, and the output end of the current sensing amplifier U7 is connected with the monitor U2 through a third relay J3.

[0013] The voltage detection circuit is provided with a resistor R4, the front end of the resistor R4 is connected with the second output end of the double throw relay J1, the back end of the resistor R4 is connected with the positive input end of a load, the positive input end of the load is connected with the negative input end in turn through a resistor R5 and a resistor R6, the negative input end of the load is connected with the ground through a resistor R9, and the common end of the resistor R5 and the resistor R6 is connected with the monitor U2 through a second relay J2.

[0014] Through the above design, the original serial detection mode is changed into a parallel detection mode, the increase of detection items does not increase the overall detection time, the product detection time is shortened by more than one time, the production efficiency is improved, meanwhile, the current, voltage and position detection functions are achieved without the need of additionally increasing the acquisition module, the higher integration is achieved, and the detection cost is reduced, the current detection circuit, the voltage detection circuit and the position detection circuit share the same monitor, and the use cost of the monitor is reduced.

[0015] The relay is replaced by the solid state relay U1 which is not easy to be damaged, and the fault-free working time of the equipment is improved. F1 is a self-recovery fuse, which prevents the measured device from being burned out due to unexpected situations in measurement.

[0016] A plurality of relays are arranged, the rapid switching of the current detection, voltage detection and position detection functions is achieved, the same monitor can perform current detection, voltage detection and position detection, the utilization rate of components is improved, and the detection cost is reduced.

[0017] As preferred: the position detection circuit is provided with a resistor R10 and a resistor R11, the monitor U2 is connected to the front end of the resistor R11 through the fourth relay J4, the rear end of the resistor R11 is connected to the ground through the resistor R10, and the common end of the resistor R10 and the resistor R11 is connected with the position sensor.

[0018] The resistor R11 is a jumper resistor, and the resistor R10 is a current sampling resistor.

[0019] The working principle is that the position sensor and the resistor R10 are connected in series in a loop, when current flows in the loop, a voltage is generated on the resistor R10, and the voltage is read by the monitoring end of U2, and the host computer can read the value through the IIC bus.

[0020] As preferred: the output end of the position sensor is further connected to the ground through a capacitor C1, and the output end of the position sensor is further connected to the ground through a sixth relay J6 and a resistor R12 in sequence.

[0021] When the fourth relay J4 is turned on, the capacitor C1 may generate interference signals, by controlling the sixth relay J6 to be turned on, and then discharging through the small resistor R12 of 100Ω, the interference signals are filtered out, and the signal quality is improved.

[0022] As preferred: the first output end of the double-pole relay J1 is further connected to the ground through a fifth relay J5 and a resistor R13 in sequence, and the first output end of the double-pole relay J1 is further connected to the reset end REF of the current sensing amplifier U7 through a capacitor C4.

[0023] When the input end and the first output end of the double-pole relay J1 are turned on, the capacitor C4 may generate interference signals, by controlling the fifth relay J5 to be turned on, and then discharging through the small resistor R13 of 100Ω, the interference signals are filtered out, and the signal quality is improved.

[0024] As preferred: the gear combination resistor is provided with at least two resistors, the rear ends of all the resistors are connected to the forward output end of the solid-state relay U1, and the front ends of all the resistors are respectively connected to different positive power supplies through the gear switch.

[0025] The first output end of the solid-state relay U1 or the independent soldering resistor R7 is connected to a 5V power supply, the first output end or the independent soldering resistor R8 is connected to a 12V power supply, and the first output end or the independent soldering resistor R22 is connected to a 15V power supply.

[0026] Through the above design, different positive power supplies can be switched according to the different power supply needs of the load, and at the same time, the power supply is switched by independently soldering low-cost resistors, so that the same current position detection circuit can be connected to different loads for detection, and the use cost is reduced.

[0027] As preferred: a protection diode D1 is reversely connected between the negative input terminal and the positive input terminal of the solid state relay U1.

[0028] The positive input terminal of the solid state relay U1 is further connected with the anode of a light emitting tube LED1, and the cathode of the light emitting tube LED1 is connected with the collector of the triode Q1 through a series resistor R2.

[0029] The light emitting tube LED1 is an on indication lamp, which is used to detect whether the positive and negative input terminals of the solid state relay U1 are on or not.

[0030] As preferred: all the monitors U2 are connected with the same host computer through a bus.

[0031] The host computer is used to control the working of all the monitors and detection modules.

[0032] As preferred: the first data transceiver SDA of the monitor U2 is connected with the first signal transceiver of the host computer, and the first data transceiver SDA is further connected with the power supply through a series resistor R25; the second data transceiver SCL of the monitor U2 is connected with the second signal transceiver of the host computer, and the second data transceiver SCL is further connected with the power supply through a series resistor R26.

[0033] The power supply terminal VS of the monitor U2 is connected with the power supply, and the power supply terminal VS is further connected with the ground through a capacitor C2.

[0034] The first relay control terminal of the host computer is connected with the base of a triode Q2 of NPN type, the collector of the triode Q2 is connected with the receiving terminal of the double-pole relay J1, the collector of the triode Q2 is further connected with the cathode of a light emitting diode D2 through a series resistor R14, the anode of the light emitting diode D2 is connected with the 5V power supply, and the emitter of the triode Q2 is connected with the ground.

[0035] The second relay control terminal of the host computer is connected with the base of a triode Q3 of NPN type, the collector of the triode Q3 is connected with the receiving terminal of the second relay J2, the collector of the triode Q3 is further connected with the cathode of a light emitting diode D3 through a series resistor R15, the anode of the light emitting diode D3 is connected with the 5V power supply, and the emitter of the triode Q3 is connected with the ground.

[0036] The third relay control terminal of the host computer is connected with the base of a triode Q4 of NPN type, the collector of the triode Q4 is connected with the receiving terminal of the third relay J3, the collector of the triode Q4 is further connected with the cathode of a light emitting diode D4 through a series resistor R16, the anode of the light emitting diode D4 is connected with the 5V power supply, and the emitter of the triode Q4 is connected with the ground.

[0037] The fourth relay control end of the upper computer is connected to the base of the NPN type triode Q5, the collector of the triode Q5 is connected to the receiving end of the fourth relay J4, the collector of the triode Q5 is also connected to the cathode of the light emitting diode D5 through a resistor R17, the anode of the light emitting diode D5 is connected to a 5V power supply, and the emitter of the triode Q5 is connected to the ground;

[0038] The fifth relay control end of the upper computer is connected to the base of the NPN type triode Q6, the collector of the triode Q6 is connected to the receiving end of the fifth relay J5, the collector of the triode Q6 is also connected to the cathode of the light emitting diode D6 through a resistor R18, the anode of the light emitting diode D6 is connected to a 5V power supply, and the emitter of the triode Q6 is connected to the ground;

[0039] The sixth relay control end of the upper computer is connected to the base of the NPN type triode Q7, the collector of the triode Q7 is connected to the receiving end of the sixth relay J6, the collector of the triode Q7 is also connected to the cathode of the light emitting diode D7 through a resistor R20, the anode of the light emitting diode D7 is connected to a 5V power supply, and the emitter of the triode Q7 is connected to the ground.

[0040] The relay control ends of the upper computer correspond to the on-off control of multiple relays, realize the selection of detection signals, and further complete the detection work of corresponding signals.

[0041] The light emitting diodes D2-D7 are on-off indicator lamps corresponding to the relays.

[0042] The capacitor C2 is used for filtering to ensure the continuous and stable input of the power supply of the monitor.

[0043] As a preferred: the upper computer control current, voltage and position detection process is:

[0044] The upper computer starts the current detection process and outputs a current detection instruction combination, which includes that the first relay control end of the upper computer controls the input end and the first output end of the double-pole relay J1 to be turned on, the third relay control end controls the third relay J3 to be turned on, and the monitor U2 collects the current detection signal and sends it to the upper computer.

[0045] Delay S1 seconds, and close the current detection process;

[0046] The upper computer starts the first zero clearing process and outputs a first circuit zero clearing instruction combination, which includes that the fifth relay control end of the upper computer controls the fifth relay J5 to be turned on, and the fifth relay J5 and the resistor R13 discharge and clear the interference signal in the current detection circuit.

[0047] Delay S2 seconds, and close the first zero clearing process;

[0048] The host computer starts a voltage detection process, and outputs a voltage detection instruction combination, the voltage detection instruction combination comprising the first relay control end of the host computer controlling the input end and the second output end of the double-pole relay J1 to be conductive, the second relay control end controlling the second relay J2 to be conductive, the monitor U2 collecting a voltage detection signal and sending the voltage detection signal to the host computer;

[0049] The delay is S3 seconds, and the voltage detection process is closed;

[0050] The host computer starts a position detection process, and outputs a position detection instruction combination, the position detection instruction combination comprising the fourth relay control end of the host computer controlling the fourth relay J4 to be conductive, and the monitor U2 collecting a position detection signal and sending the position detection signal to the host computer;

[0051] The delay is S4 seconds, and the position detection process is closed;

[0052] The host computer starts a second zero clearing process, and outputs a second circuit zero clearing instruction combination, the second circuit zero clearing instruction combination comprising the sixth relay control end of the host computer controlling the sixth relay J6 to be conductive, the sixth relay J6 and the resistor R12 discharging and clearing interference signals in the position detection circuit.

[0053] The detection instruction end CTRL of the host computer sends a detection instruction to the resistor R1, when the first relay control end of the host computer controls the input end and the first output end of the double-pole relay J1 to be conductive, the third relay control end controls the third relay J3 to be conductive, and J2 and J4 are closed, current detection is performed; when the first relay control end of the host computer controls the input end and the second output end of the double-pole relay J1 to be conductive, the second relay control end controls the second relay J2 to be conductive, and J3 and J4 are closed, voltage detection is performed; when the fourth relay control end of the host computer controls the fourth relay J4 to be conductive, and J2 and J3 are closed, position detection is performed.

[0054] As a preferred: the host computer is provided with a detection instruction end CTRL connected with the resistor R1.

[0055] The host computer is used for sending detection instructions and receiving detection data.

[0056] The application has the advantages that: the current and voltage of each part are detected by using the parallel detection mode, the overall detection time is not increased even if the detection items are increased, the product detection time is greatly shortened, and the production efficiency is improved; meanwhile, the position sensor detection channel is increased, the acquisition module is not additionally increased, the integration degree is higher, and the detection cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0057] Figure 1 It is a detection module circuit diagram;

[0058] Figure 2 The upper computer circuit diagram. DETAILED DESCRIPTION

[0059] The application will be further described in detail below in conjunction with the drawings and specific examples. The following examples or drawings are used to illustrate the application, but not to limit the scope of the application.

[0060] As Figure 1 The current and voltage monitoring and detection system of the automobile central armrest box is characterized in that: n monitors U2 are arranged, each monitor U2 is connected with a detection module, each detection module is provided with a current detection circuit, a voltage detection circuit, a position detection circuit and a control starting circuit;

[0061] The control starting circuit is connected with the current detection circuit and the voltage detection circuit through a double-throw relay J1, and the monitoring end of the monitor U2 is connected with the voltage detection circuit, the current detection circuit and the position detection circuit through a relay switch group J2-J4;

[0062] The control starting circuit is provided with a resistor R1, the front end of the resistor R1 is used for acquiring a detection instruction, the back end of the resistor R1 is connected with the base of a NPN type triode Q1, the emitter of the triode Q1 is connected with the ground through a resistor R3, and the collector is connected with the negative input end of a solid-state relay U1, the positive input end of the solid-state relay U1 is connected with a 5V power supply, the positive output end of the solid-state relay U1 is connected with a positive power supply through a gear combination resistor, the negative output end of the solid-state relay U1 is connected with the input end of the double-throw relay J1, the first output end of the double-throw relay J1 is connected with the current detection circuit, and the second output end of the double-throw relay J1 is connected with the voltage detection circuit;

[0063] The current detection circuit is provided with a recovery fuse F1, the front end of the recovery fuse F1 is connected with the first output end of the double-throw relay J1, the back end of the recovery fuse F1 is connected with the front end of a sampling resistor R19, and the back end of the sampling resistor R19 is connected with a load; the two ends of the sampling resistor R19 are also connected with the input end of a current sensing amplifier U7 in a corresponding group, and the output end of the current sensing amplifier U7 is connected with the monitor U2 through a third relay J3;

[0064] The working principle of current detection is as follows:

[0065] The detected component, i.e. the positive and negative poles of the load, is connected to the 1 and 3 pins of the JP4 socket, the voltage of the measured component is selected by welding one of the resistors R7 and R8, a high level is given to the resistor R1 by the host computer to turn on the transistor Q1, and then the input control end group of the solid state relay U1 is turned on, and then the mos tube of the output end group is turned on, the input end and the first output end of the double throw relay J1 are turned on by the host computer, and then the measured component is in the normal working state, the resistor R19 is connected in series in the working loop as a current sampling resistor, the current flowing through is converted into voltage and amplified by U7 by 100 times, and is collected by U2, and the actual current value can be obtained by the host computer reading the register of U2 after conversion.

[0066] The voltage detection circuit is provided with a resistor R4, the front end of the resistor R4 is connected to the second output end of the double throw relay J1, the rear end of the resistor R4 is connected to the positive input end of the load, the positive input end of the load is connected in series with a resistor R5 and a resistor R6 in turn, and the negative input end of the load is connected in series with a resistor R9 and then grounded, and the common end of the resistor R5 and the resistor R6 is connected to the monitor U2 through the second relay J2.

[0067] The working principle of voltage detection is as follows:

[0068] The detected component, i.e. the positive and negative poles of the load, is connected to the 1 and 2 pins of the JP3 socket, the voltage of the measured component is selected by welding one of the resistors R7 and R8, a high level is given to the resistor R1 by the host computer to turn on the transistor Q1, and then the light emitting tube LED connected in series in the positive and negative input loop of the solid state relay U1 is turned on, the positive and negative input ends of the solid state relay U1 are turned on, and the positive and negative output ends are turned on, the input end and the second output end of the double throw relay J1 are turned on by the host computer, and then the measured component is in the normal working state. The resistors R5 and R6 are high and low side detection selection resistors, which are selected according to the actual situation, and the resistors R4 and R9 are voltage dividing resistors. The host computer reads the change of the voltage of the measured device through the IIC bus of the monitor U2 to determine whether the device is inserted.

[0069] The position detection circuit is provided with a resistor R10 and a resistor R11, the monitor U2 is connected to the front end of the resistor R11 through the fourth relay J4, the rear end of the resistor R11 is connected in series with a resistor R10 and then grounded, and the common end of the resistor R10 and the resistor R11 is connected with a position sensor.

[0070] The output end of the position sensor is also connected in series with a capacitor C1 and then grounded, and the output end of the position sensor is also connected in series with a sixth relay J6 and a resistor R12 and then grounded.

[0071] The first output end of the double-pole relay J1 is connected to the ground through the fifth relay J5 and the resistor R13 in sequence, and the first output end of the double-pole relay J1 is connected to the reset end REF of the current sensing amplifier U7 through the capacitor C4.

[0072] The gear shifting combination resistor is provided with at least two resistors, the rear ends of all the resistors are connected to the forward output end of the solid-state relay U1, and the front ends of all the resistors are respectively connected to different positive power sources through the gear shifting switch.

[0073] The first output end of the solid-state relay U1 or the independent welding resistor R7 is connected to a 5V power source, the first output end or the independent welding resistor R8 is connected to a 12V power source, and the first output end or the independent welding resistor R22 is connected to a 15V power source.

[0074] The negative input end and the positive input end of the solid-state relay U1 are reversely connected with the protection diode D1;

[0075] The positive input end of the solid-state relay U1 is further connected to the anode of the light-emitting tube LED1, the cathode of the light-emitting tube LED1 is connected to the resistor R2, and the resistor R2 is connected to the collector of the triode Q1.

[0076] As shown in Figure 2 All the monitors U2 are connected to the same host computer through the bus.

[0077] The first data transceiver end SDA of the monitor U2 is connected to the first signal transceiver end of the host computer, and the first data transceiver end SDA is further connected to the power source through the resistor R25; the second data transceiver end SCL of the monitor U2 is connected to the second signal transceiver end of the host computer, and the second data transceiver end SCL is further connected to the power source through the resistor R26;

[0078] The first relay control end of the host computer is connected to the base of the NPN triode Q2, the collector of the triode Q2 is connected to the receiving end of the double-pole relay J1, the collector of the triode Q2 is further connected to the cathode of the light-emitting diode D2 through the resistor R14, the anode of the light-emitting diode D2 is connected to a 5V power source, and the emitter of the triode Q2 is connected to the ground.

[0079] The second relay control end of the host computer is connected to the base of the NPN triode Q3, the collector of the triode Q3 is connected to the receiving end of the second relay J2, the collector of the triode Q3 is further connected to the cathode of the light-emitting diode D3 through the resistor R15, the anode of the light-emitting diode D3 is connected to a 5V power source, and the emitter of the triode Q3 is connected to the ground.

[0080] The third relay control end of the upper computer is connected with the base of the NPN type triode Q4, the collector of the triode Q4 is connected with the receiving end of the third relay J3, the collector of the triode Q4 is also connected with the cathode of the light emitting diode D4 through the resistor R16, the anode of the light emitting diode D4 is connected with the 5V power supply, and the emitter of the triode Q4 is connected with the ground;

[0081] The fourth relay control end of the upper computer is connected with the base of the NPN type triode Q5, the collector of the triode Q5 is connected with the receiving end of the fourth relay J4, the collector of the triode Q5 is also connected with the cathode of the light emitting diode D5 through the resistor R17, the anode of the light emitting diode D5 is connected with the 5V power supply, and the emitter of the triode Q5 is connected with the ground;

[0082] The fifth relay control end of the upper computer is connected with the base of the NPN type triode Q6, the collector of the triode Q6 is connected with the receiving end of the fifth relay J5, the collector of the triode Q6 is also connected with the cathode of the light emitting diode D6 through the resistor R18, the anode of the light emitting diode D6 is connected with the 5V power supply, and the emitter of the triode Q6 is connected with the ground;

[0083] The sixth relay control end of the upper computer is connected with the base of the NPN type triode Q7, the collector of the triode Q7 is connected with the receiving end of the sixth relay J6, the collector of the triode Q7 is also connected with the cathode of the light emitting diode D7 through the resistor R20, the anode of the light emitting diode D7 is connected with the 5V power supply, and the emitter of the triode Q7 is connected with the ground.

[0084] The power supply end VS of the monitor U2 is connected with the power supply, and the power supply end VS is also connected with the ground through the capacitor C2.

[0085] The upper computer is provided with the detection instruction end CTRL connected with the resistor R1.

[0086] The current, voltage and position detection process of the upper computer is as follows:

[0087] The upper computer starts the current detection process, and outputs the current detection instruction combination, which includes that the first relay control end of the upper computer controls the input end and the first output end of the double-pole relay J1 to be turned on, the third relay control end controls the third relay J3 to be turned on, the monitor U2 collects the current detection signal and sends it to the upper computer;

[0088] Delay for 0.5 seconds, and close the current detection process;

[0089] The host computer starts a first zero clearing process, and outputs a first circuit zero clearing instruction combination, which includes controlling the fifth relay J5 to be turned on at the fifth relay control end of the host computer, and the fifth relay J5 and the resistor R13 discharge and clear the interference signal in the current detection circuit;

[0090] Delay for 0.5 seconds, and close the first zero clearing process;

[0091] The host computer starts a voltage detection process, and outputs a voltage detection instruction combination, which includes controlling the input end and the second output end of the double-pole relay J1 to be turned on at the first relay control end of the host computer, controlling the second relay J2 to be turned on at the second relay control end, collecting the voltage detection signal by the monitor U2, and sending the voltage detection signal to the host computer;

[0092] Delay for 0.5 seconds, and close the voltage detection process;

[0093] The host computer starts a position detection process, and outputs a position detection instruction combination, which includes controlling the fourth relay J4 to be turned on at the fourth relay control end of the host computer, and collecting the position detection signal by the monitor U2 and sending the position detection signal to the host computer;

[0094] Delay for 0.5 seconds, and close the position detection process;

[0095] The host computer starts a second zero clearing process, and outputs a second circuit zero clearing instruction combination, which includes controlling the sixth relay J6 to be turned on at the sixth relay control end of the host computer, and the sixth relay J6 and the resistor R12 discharge and clear the interference signal in the position detection circuit.

[0096] The model of the monitor U2 in the embodiment is INA226AIDGSR, the model of the current sensing amplifier U7 is INA199A2DCKR, and the diode D1 is a Schottky diode.

[0097] The above only describes the preferred embodiments of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A current and voltage monitoring and detection system for a central armrest box of an automobile, characterized by: The device is provided with n monitors U2, each of which is connected with a detection module, each of which is provided with a current detection circuit, a voltage detection circuit, a position detection circuit and a control starting circuit; The control starting circuit is connected with the current detection circuit and the voltage detection circuit through a double-throw relay J1, and the monitoring end of the monitor U2 is connected with the voltage detection circuit, the current detection circuit and the position detection circuit through relay switch groups J2-J4; The control starting circuit is provided with a resistor R1, the front end of which is used for obtaining a detection instruction, the back end of which is connected with the base of a NPN type triode Q1, the emitter of which is connected with the ground through a resistor R3, and the collector of which is connected with the negative input end of a solid-state relay U1, the positive input end of which is connected with a 5V power supply, the positive output end of which is connected with a positive power supply through a gear combination resistor, the negative output end of which is connected with the input end of the double-throw relay J1, the first output end of which is connected with the current detection circuit, and the second output end of which is connected with the voltage detection circuit; The current detection circuit is provided with a recovery fuse F1, the front end of which is connected with the first output end of the double-throw relay J1, and the back end of which is connected with the front end of a sampling resistor R19, the back end of which is connected with a load; the two ends of the sampling resistor R19 are also connected with the input end of a current sensing amplifier U7 in a corresponding manner, and the output end of the current sensing amplifier U7 is connected with the monitor U2 through a third relay J3; The voltage detection circuit is provided with a resistor R4, the front end of which is connected with the second output end of the double-throw relay J1, and the back end of which is connected with the positive input end of a load, which is also connected with a resistor R5 and a resistor R6 in sequence before being connected with the negative input end, the negative input end of the load is connected with the ground through a resistor R9, and the common end of the resistor R5 and the resistor R6 is connected with the monitor U2 through a second relay J2; The position detection circuit is provided with a resistor R10 and a resistor R11, the front end of the resistor R11 is connected with the monitor U2 through a fourth relay J4, the back end of the resistor R11 is connected with the ground through a resistor R10, and the common end of the resistor R10 and the resistor R11 is connected with a position sensor.

2. The current and voltage monitoring system for a center console of an automobile according to claim 1, characterized in that: The output end of the position sensor is also connected with the ground through a capacitor C1, and the output end of the position sensor is also connected with the ground through a sixth relay J6 and a resistor R12 in sequence.

3. The current and voltage monitoring system for a center console of an automobile according to claim 1, wherein: The first output end of the double-throw relay J1 is also connected with the ground through a fifth relay J5 and a resistor R13 in sequence, and the first output end of the double-throw relay J1 is also connected with the reset end REF of the current sensing amplifier U7 through a capacitor C4.

4. The current and voltage monitoring system for a center console of an automobile according to claim 1, characterized in that: The gear combination resistor is provided with at least two resistors, the back ends of all the resistors are connected with the positive output end of the solid-state relay U1, and the front ends of all the resistors are connected with different positive power supplies through gear switches.

5. The current and voltage monitoring system for a center console of an automobile as claimed in claim 1, wherein: The negative input end and the positive input end of the solid-state relay U1 are reversely connected with a protection diode D1. The positive input end of the solid-state relay U1 is also connected with the anode of a light emitting tube LED1, the cathode of which is connected with the collector of the triode Q1 through a resistor R2.

6. The current and voltage monitoring system for a center console of an automobile as claimed in claim 1, wherein: All the monitors U2 are connected with the same host computer through a bus.

7. The current and voltage monitoring system for a center console of an automobile as claimed in claim 6, wherein: The first data transceiver end SDA of the monitor U2 is connected with the first signal transceiver end of the host computer, and is also connected with the power supply through a resistor R25; the second data transceiver end SCL of the monitor U2 is connected with the second signal transceiver end of the host computer, and is also connected with the power supply through a resistor R26; The power supply end VS of the monitor U2 is connected with the power supply, and is also connected with the ground through a capacitor C2; The first relay control end of the host computer is connected with the base of a triode Q2 of NPN type, the collector of which is connected with the receiving end of the double-pole relay J1, and is also connected with the cathode of a light emitting diode D2 through a resistor R14, the anode of the light emitting diode D2 being connected with a 5V power supply, the emitter of the triode Q2 being connected with the ground; The second relay control end of the host computer is connected with the base of a triode Q3 of NPN type, the collector of which is connected with the receiving end of the second relay J2, and is also connected with the cathode of a light emitting diode D3 through a resistor R15, the anode of the light emitting diode D3 being connected with a 5V power supply, the emitter of the triode Q3 being connected with the ground; The third relay control end of the host computer is connected with the base of a triode Q4 of NPN type, the collector of which is connected with the receiving end of the third relay J3, and is also connected with the cathode of a light emitting diode D4 through a resistor R16, the anode of the light emitting diode D4 being connected with a 5V power supply, the emitter of the triode Q4 being connected with the ground; The fourth relay control end of the host computer is connected with the base of a triode Q5 of NPN type, the collector of which is connected with the receiving end of the fourth relay J4, and is also connected with the cathode of a light emitting diode D5 through a resistor R17, the anode of the light emitting diode D5 being connected with a 5V power supply, the emitter of the triode Q5 being connected with the ground; The fifth relay control end of the host computer is connected with the base of a triode Q6 of NPN type, the collector of which is connected with the receiving end of the fifth relay J5, and is also connected with the cathode of a light emitting diode D6 through a resistor R18, the anode of the light emitting diode D6 being connected with a 5V power supply, the emitter of the triode Q6 being connected with the ground; The sixth relay control end of the host computer is connected with the base of a triode Q7 of NPN type, the collector of which is connected with the receiving end of the sixth relay J6, and is also connected with the cathode of a light emitting diode D7 through a resistor R20, the anode of the light emitting diode D7 being connected with a 5V power supply, the emitter of the triode Q7 being connected with the ground.

8. The current-voltage monitoring and detection system of a center console box of an automobile according to claim 7, characterized in that, The host computer controls the current, voltage and position detection process as follows: The host computer starts a current detection process, and outputs a current detection instruction combination, which includes that the first relay control end of the host computer controls the input end and the first output end of the double-pole relay J1 to be conductive, the third relay control end controls the third relay J3 to be conductive, and the monitor U2 collects a current detection signal and sends it to the host computer; Delay S1 seconds, and close the current detection process; The host computer starts a first zero clearing process, and outputs a first circuit zero clearing instruction combination, which includes that the fifth relay control end of the host computer controls the fifth relay J5 to be conductive, the fifth relay J5 and the resistor R13 discharge and clear interference signals in the current detection circuit; Delay S2 seconds, and close the first zero clearing process; The host computer starts a voltage detection process, and outputs a voltage detection instruction combination, which includes that the first relay control end of the host computer controls the input end and the second output end of the double-pole relay J1 to be conductive, the second relay control end controls the second relay J2 to be conductive, and the monitor U2 collects a voltage detection signal and sends it to the host computer; Delay S3 seconds, and close the voltage detection process; The host computer starts a position detection process, and outputs a position detection instruction combination, which includes that the fourth relay control end of the host computer controls the fourth relay J4 to be conductive, and the monitor U2 collects a position detection signal and sends it to the host computer; Delay S4 seconds, and close the position detection process; The host computer starts a second zero clearing process, and outputs a second circuit zero clearing instruction combination, which includes that the sixth relay control end of the host computer controls the sixth relay J6 to be conductive, the sixth relay J6 and the resistor R12 discharge and clear interference signals in the position detection circuit.

9. The current-voltage monitoring and detection system of a center console box of an automobile according to claim 6, characterized in that: The host computer is provided with a detection instruction end CTRL connected with the resistor R1.

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