CN117310442A - High-low side switch detection circuit and method - Google Patents

High-low side switch detection circuit and method Download PDF

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Publication number
CN117310442A
CN117310442A CN202311251378.4A CN202311251378A CN117310442A CN 117310442 A CN117310442 A CN 117310442A CN 202311251378 A CN202311251378 A CN 202311251378A CN 117310442 A CN117310442 A CN 117310442A
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CN
China
Prior art keywords
relay
controller
signal
driving circuit
resistor
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Granted
Application number
CN202311251378.4A
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Chinese (zh)
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CN117310442B (en
Inventor
何礼彬
白雷
冯志远
王大书
付君
雷彬
张培
朱洪彬
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JIANGXI ZHIFANG NUMERICAL CONTROL POWER CO Ltd
Chengdu Tiandi Zhifang Engine Co ltd
Shanxi Tiandi Coal Mining Machinery Co Ltd
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JIANGXI ZHIFANG NUMERICAL CONTROL POWER CO Ltd
Chengdu Tiandi Zhifang Engine Co ltd
Shanxi Tiandi Coal Mining Machinery Co Ltd
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Application filed by JIANGXI ZHIFANG NUMERICAL CONTROL POWER CO Ltd, Chengdu Tiandi Zhifang Engine Co ltd, Shanxi Tiandi Coal Mining Machinery Co Ltd filed Critical JIANGXI ZHIFANG NUMERICAL CONTROL POWER CO Ltd
Priority to CN202311251378.4A priority Critical patent/CN117310442B/en
Publication of CN117310442A publication Critical patent/CN117310442A/en
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Publication of CN117310442B publication Critical patent/CN117310442B/en
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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
    • G01R31/28—Testing of electronic circuits, e.g. by signal tracer
    • G01R31/282—Testing of electronic circuits specially adapted for particular applications not provided for elsewhere
    • 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
    • G01R31/28—Testing of electronic circuits, e.g. by signal tracer
    • G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
    • G01R31/2834—Automated test systems [ATE]; using microprocessors or computers
    • 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
    • G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
    • 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

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)

Abstract

The invention relates to a high-low side switch detection circuit and a method, wherein the circuit comprises a power load, a first relay and a controller; the signal input end of the controller is connected with the tested driving circuit and is used for acquiring the type information of the tested driving circuit; the signal output end of the controller is connected with the first relay so as to control the first relay according to the type information; under the control of the controller, the movable contact of the first relay is alternatively connected with the first stationary contact or the second stationary contact; the signal input end of the controller is also connected with one end of the power load and is used for monitoring a voltage signal of one end of the power load and judging the on-off state of the tested driving circuit according to the voltage signal; the invention can identify the types of the high-low side switch, cut off the corresponding detection circuits according to the types of the high-low side switch, and realize the compatibility test of the high-low side switch, namely the power supply circuit and the grounding circuit in the invention, without arranging test circuits respectively, so that the test of the high-low side switch is more convenient and economical.

Description

High-low side switch detection circuit and method
Technical Field
The invention relates to the technical field of automobile auxiliary control, in particular to a high-low side switch detection circuit and a method.
Background
With the continuous expansion and continuous upgrading of automobile functions, auxiliary devices such as various lights, valves, motors, heating devices and the like are increasing, and in an automobile controller, corresponding driving circuits are required to control peripheral devices, so that a large number of driving circuits, also called power switch circuits, exist in the controller. According to different peripheral control modes, the power switches in the controller are generally divided into a high-side switch (the positive electrode of a peripheral power supply is connected when the switch is opened to provide power for the peripheral) and a low-side switch (the switch is connected with a ground wire to provide a ground loop for the peripheral), and each power switch selects the switch capacity according to the peripheral power, so that a large number of test loads with different powers and different control modes are required when the controller is tested. The common test circuit and method need to test the high-side switch and the low-side switch respectively, namely, the high-side switch test circuit and the low-side switch test circuit are respectively arranged, when in test, the high-side switch test channel must be connected with the high-side switch driving channel of the tested equipment, the low-side switch test channel must be connected with the low-side switch driving channel of the tested equipment, the test circuit cannot realize the compatibility of the high-side switch driving channel and the low-side switch driving channel test, and therefore, the test equipment is complicated in wiring, namely, different test wire harnesses need to be replaced when the number of the high-side switch or the low-side switch of the tested equipment, the pin configuration of the connector and the like are different, the power load types are more, and the test efficiency is low.
Disclosure of Invention
In order to solve the technical problems that in the prior art, a high-low side switch cannot realize test compatibility and the like, the invention provides a high-low side switch detection circuit and a method.
The technical scheme for solving the technical problems is as follows:
the high-low side switch detection circuit comprises a power load, a first relay and a controller, wherein a static contact of the first relay comprises a first static contact and a second static contact;
one end of the power load is connected with a peripheral interface, and the peripheral interface is used for accessing a tested driving circuit; the other end of the power load is connected with the movable contact of the first relay; the first static contact of the first relay is connected with an auxiliary power supply, and the second static contact of the first relay is grounded;
the signal input end of the controller is connected with the tested driving circuit and is used for acquiring type information of the tested driving circuit;
the signal output end of the controller is connected with the first relay so as to control the first relay according to the type information;
the movable contact of the first relay is alternatively connected with the first fixed contact or the second fixed contact under the control of the controller;
The signal input end of the controller is also connected with one end of the power load and is used for monitoring a voltage signal of one end of the power load and judging the on-off state of the tested driving circuit according to the voltage signal.
The beneficial effects of the invention are as follows: the circuit type of the tested driving circuit is obtained through the controller, and the detection circuit is automatically switched according to the circuit type. Meanwhile, the relay is used for controlling whether the other end of the power load is grounded or connected with a power supply so as to switch on and off of a tested driving circuit loaded at one end of the power load, so that the compatibility test of the high-low side switch, namely the power supply circuit and the grounding loop in the invention can be realized, and the test of automatically switching the high-low side switch is realized without arranging a test circuit respectively, thereby ensuring that the test is more convenient and economical.
On the basis of the technical scheme, the invention can be improved as follows.
The relay further comprises a second relay, a first current sensor and a second current sensor, wherein the fixed contact of the second relay comprises a first fixed contact and a second fixed contact;
the negative electrode of the power input end of the first current sensor is connected with the first static contact of the second relay, and the positive electrode of the power input end of the second current sensor is connected with the second static contact of the second relay;
The positive electrode of the power input end of the first current sensor and the negative electrode of the power input end of the second current sensor are connected with the peripheral interface;
the signal output end of the controller is also connected with the second relay so as to control the second relay according to the type information;
the movable contact of the second relay is alternatively connected with the first fixed contact or the second fixed contact under the control of the controller;
the signal input end of the controller is respectively connected with the current signal output end of the first current sensor and the current signal output end of the second current sensor and is used for receiving the first current information of the branch where the first current sensor is located and the second current information of the branch where the second current sensor is located;
the controller is also used for judging the on-off state of the tested driving circuit, calculating the current of the tested driving circuit and judging the current carrying capacity of the tested driving circuit according to the first current information or the second current information.
The technical effect of adopting the further scheme is that through setting up first current sensor and second current sensor to utilize two current sensor to detect the operating current of two types of drive circuit that is surveyed respectively, not only can judge the break-make of drive circuit that is surveyed through the electric current in the circuit, can also judge whether drive circuit that is surveyed is damaged.
Further, the circuit further comprises a first signal amplifier and a second signal amplifier, wherein the first current sensor and the second current sensor are Hall current sensors;
the current signal output end of the first current sensor is connected with the controller through the first signal amplifier, and the first signal amplifier is used for amplifying the first current information;
the current signal output end of the second current sensor is connected with the controller through the second signal amplifier, and the second signal amplifier is used for amplifying the second current information.
Further, the control device also comprises a second program control switch and a first program control switch;
the signal output end of the controller is connected with the coil of the second relay through the second program control switch so as to control the on-off of the coil of the second relay through the controller;
the signal output end of the controller is connected with the coil of the first relay through the first program control switch, so that the controller can control the on-off of the coil of the first relay.
Further, the circuit also comprises a first photoelectric coupler, a twenty-eighth resistor, a twenty-seventh resistor and a first Schmitt trigger; the second program-controlled switch and the first program-controlled switch are switching tubes;
The positive electrode of the input end of the first photoelectric coupler is connected with a power supply through the twenty-seventh resistor, the positive electrode of the input end of the first photoelectric coupler is connected with the output end of the first Schmitt trigger, and the negative electrode of the input end of the first photoelectric coupler is grounded; the input end of the first Schmitt trigger is connected with the signal output end of the controller;
the positive electrode of the output end of the first photoelectric coupler is connected with a power supply through the twenty-eighth resistor, and the negative electrode of the output end of the first photoelectric coupler is grounded;
the positive electrode of the output end of the first photoelectric coupler is respectively connected with the base electrode of the second programmable switch and the base electrode of the first programmable switch, the emitter electrode of the second programmable switch is grounded, and the base electrode of the second programmable switch and the coil string of the second relay are connected with a power supply;
the emitter of the first programmable switch is grounded, and the base of the first programmable switch and the coil string of the first relay are connected with a power supply.
Further, the system also comprises an external communication module and an upper computer;
the controller is connected with the tested driving circuit through the external communication module so as to acquire the type information of the tested driving circuit;
The controller is in communication connection with the upper computer through the external communication module, so that the upper computer receives a test result through the controller; the test result comprises type information, on-off information and current information of the tested driving circuit; the current information is the first current information or the second current information.
The further technical scheme has the beneficial effects that the upper computer is arranged, and the upper computer is utilized to receive the detection result information, so that the test result can be stored and displayed conveniently through the upper computer.
Further, the external communication module comprises a CAN transceiver, a sixteenth resistor, a seventeenth resistor, an eighteenth resistor, two zener diodes 1, a fourteenth capacitor, a fifteenth capacitor and a sixteenth capacitor;
the data receiving end of the CAN transceiver is connected with the signal transmitting end of the controller U1 through the seventeenth resistor, and the data transmitting end of the CAN transceiver is connected with the signal receiving end of the controller U1;
the high-speed CAN bus end of the CAN transceiver is grounded through the sixteenth resistor and the sixteenth capacitor which are connected in series, the high-speed CAN bus end of the CAN transceiver is grounded through the fifteenth capacitor which is connected in series, and the high-speed CAN bus end of the CAN transceiver is grounded through one of the voltage stabilizing diodes which is connected in series;
The low-speed CAN bus end of the CAN transceiver is grounded through the eighteenth resistor and the sixteenth capacitor which are connected in series; the low-speed CAN bus end of the CAN transceiver is grounded through the fourteenth capacitor connected in series, and the low-speed CAN bus end of the CAN transceiver is grounded through the other voltage stabilizing diode connected in series;
and the bus end of the CAN transceiver is respectively connected with the upper computer and the tested driving circuit.
Further, the circuit also comprises a second photoelectric coupler, a thirty-first resistor and a second Schmitt trigger;
the positive electrode of the input end of the second photoelectric coupler is connected with one end of the power load, the negative electrode of the input end of the second photoelectric coupler is grounded, the positive electrode of the output end of the second photoelectric coupler is connected with a power supply through the thirty-th resistor, and the negative electrode of the output end of the second photoelectric coupler is grounded;
the input end of the second Schmitt trigger is connected with the positive electrode of the output end of the second photoelectric coupler, and the output end of the second Schmitt trigger is connected with the signal input end of the controller.
Further, the power load comprises a Darlington tube array chip, a third relay, a fourth relay, a fifth relay, a twelfth resistor, a fourteenth resistor and a fifteenth resistor;
The output end of the Darlington tube array chip is respectively connected with one end of the coil of the third relay, one end of the coil of the fourth relay and one end of the coil of the fifth relay; the other end of the coil of the third relay, the other end of the coil of the fourth relay and the other end of the coil of the fifth relay are connected with a power supply;
the movable contact of the third relay, the movable contact of the fourth relay and the movable contact of the fifth relay are all connected with the movable contact of the first relay; the normally open contact or the normally closed contact of the third relay is connected with the movable contact of the second relay through the twelfth resistor, the normally open contact or the normally closed contact of the fourth relay is connected with the movable contact of the second relay through the fourteenth resistor, and the normally open contact or the normally closed contact of the fifth relay is connected with the movable contact of the second relay through the fifteenth resistor;
the input end of the Darlington tube array chip is connected with the output end of the controller, so that the controller can respectively control the on-off of the coils of the third relay, the fourth relay and the fifth relay through the Darlington tube array chip; the voltage signal is a voltage at a movable contact of the second relay.
In order to solve the technical problems, the invention also provides a detection method for the high-low side switch, which comprises the following specific technical contents:
a high-low side switch detection method is applied to the high-low side switch detection circuit, and comprises the following steps:
acquiring the type information of the tested driving circuit by using the controller;
the controller judges the type of the tested driving circuit according to the type information; when the type information is high-side switch information, the tested driving circuit is judged to be a power supply circuit; when the type information is low-side switch information, judging that the tested driving circuit is a grounding loop;
when the tested driving circuit is judged to be a power supply circuit, the controller sends first control information to the first relay so as to control the movable contact of the first relay to be communicated with the second fixed contact of the first relay;
monitoring a voltage signal at one end of the power load by using the controller, and judging the on-off state of the power supply circuit according to the voltage signal; when the voltage signal is a high-level signal, the power supply circuit is a passage; when the voltage signal is a low-level signal, the power supply circuit is disconnected;
When the tested driving circuit is judged to be a grounding loop, the controller sends second control information to the first relay so as to control the movable contact of the first relay to be communicated with the first static contact of the first relay;
monitoring a voltage signal at one end of the power load by using the controller, and judging the on-off state of the power supply circuit according to the voltage signal; when the voltage signal is a low-level signal, judging that the grounding loop is a passage; and when the voltage signal is a high-level signal, judging that the grounding loop is open-circuited.
Further, the method for detecting the high-low side switch further comprises the following steps:
receiving first current information of a branch circuit where the first current sensor is located and second current information of a branch circuit where the second current sensor is located by using the controller;
and judging the on-off state of the tested driving circuit, calculating the current of the tested driving circuit and judging the current carrying capacity of the tested driving circuit by using the controller according to the first current information or the second current information.
Drawings
FIG. 1 is a schematic block diagram of a high-low side switch detection circuit according to an embodiment of the present invention;
FIG. 2 is a circuit diagram of a high-low side switch detection circuit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a pin structure of a controller according to an embodiment of the present invention;
FIG. 4 is a circuit diagram of an external communication module according to an embodiment of the invention;
fig. 5 is a schematic circuit diagram of a power load according to the present invention.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
As shown in fig. 1, the present embodiment provides a high-low side switch detection circuit, which includes a second relay LS4, a power load R29, a first relay LS5, and a controller U1;
the movable contact of the second relay LS4 is connected with one end of the power load R29, and one end of the power load R29 is connected with the movable contact of the first relay LS5; the normally closed contact of the first relay LS5 is connected with an auxiliary power supply, and the normally open contact of the first relay LS5 is grounded; the first contact of the first relay LS5 is a normally open contact, and the second contact is a normally closed contact. The first contact of the second relay LS4 is a normally open contact, and the second contact is a normally closed contact.
The signal input end of the controller U1 is connected with the tested driving circuit and is used for acquiring type information of the tested driving circuit; the signal output end of the controller U1 is connected with the first relay LS5 to control the first relay LS5 according to the type information; under the control of the controller U1, the movable contact of the first relay LS5 is alternatively connected with the first stationary contact or the second stationary contact; the signal input end of the controller U1 is also connected with one end of the power load R29, and is used for monitoring a voltage signal at one end of the power load R29 and judging the on-off state of the tested driving circuit according to the voltage signal.
If the tested driving circuit is a grounding loop, namely the grounding loop is loaded at the end of the I_S_LSD/HSD, one end of the power load R29 is communicated with the grounding loop, and the other end of the power load R29 is communicated with the auxiliary power supply; after the grounding loop is normally connected, one end of the power load R29 is grounded, and then one end of the power load R29 is in low potential, namely the electric signal read by the controller U1 is in low potential; when the voltage signal is a low level signal, the ground loop is a path; when the controller U1 judges that the voltage signal is a high-level signal, the grounding loop is broken; when the tested driving circuit is a power supply circuit, one end of the power load R29 is communicated with the power supply circuit, and the other end of the power load R29 is grounded; when the controller U1 judges that the voltage signal is a low-level signal, the power supply circuit is open-circuited; when the controller U1 determines that the voltage signal is a high level signal, that is, the voltage signal is that one end of the power load R29 is at a high potential, the power supply circuit is a path. In this embodiment, by collecting the voltage value at one end of the power load R29, whether the ground circuit or the power supply circuit is turned on or off is determined according to the high level and the low level represented by the collected voltage value, and the working state detection of the ground circuit, i.e., the low-side switch or the power supply circuit, i.e., the high-side switch, is combined by using one circuit. And before the on-off state of the tested driving circuit is detected, the circuit state of the tested driving circuit is obtained, so that the corresponding detection circuit is switched according to the type of the tested driving circuit, automatic detection is realized, and the detection efficiency is improved. In some embodiments, the high-low side switch detection circuit includes a first current sensor U4, a second current sensor U7, a first signal amplifier U5, a second signal amplifier U6, a second programmable switch Q1, and a first programmable switch Q2.
The negative electrode of the power input end of the first current sensor U4 is connected with the normally open contact of the second relay LS4, and the positive electrode of the power input end of the second current sensor U7 is connected with the normally closed contact of the second relay LS 4.
The positive electrode of the power input end of the first current sensor U4 and the negative electrode of the power input end of the second current sensor U7 are both connected with the peripheral interface.
The signal input end of the controller U1 is connected to the current signal output end of the first current sensor U4 and the current signal output end of the second current sensor U7, respectively, and is configured to receive the first current information of the branch where the first current sensor U4 is located and the second current information of the branch where the second current sensor U7 is located.
The controller U1 is further configured to determine on-off of the tested driving circuit, calculate a current of the tested driving circuit, and determine current carrying capacity of the tested driving circuit according to the first current information or the second current information.
Meanwhile, the method for judging the current carrying capacity of the tested driving circuit can be specifically realized by acquiring the current of the tested driving circuit, when the resistance value of the power load R29 is regulated, the voltage value of one end of the power load R29 is equal to the current of the tested driving circuit multiplied by the resistance value of the power load R29, so that the voltage of one end of the power load R29 is in linear relation with the current of the tested driving circuit, and if the current of the tested driving circuit is unchanged or is free of current in the process of regulating the resistance value of the power load R29, the current carrying capacity of the tested driving circuit is determined by acquiring the current of the tested driving circuit when the tested driving circuit is overloaded or damaged. Therefore, the embodiment of the invention can judge whether the tested driving circuit works normally or not by acquiring the current of the tested driving circuit, thereby improving the accuracy of the detection result. Because, when the current of the tested driving circuit is not used to verify whether the tested driving circuit works normally, the accuracy of the test result can be affected due to the damage of the tested driving circuit.
Specifically, in some embodiments, the first current sensor U4 and the second current sensor U7 are both hall current sensors; the current signal output end of the first current sensor U4 is connected with the controller U1 through the first signal amplifier U5 so as to amplify the first current information; the current signal output end of the second current sensor U7 is connected to the controller U1 through the second signal amplifier U6, so as to amplify the second current information.
The signal output end of the controller U1 is connected with the coil of the second relay LS4 through the second program control switch Q1, so that the on-off of the coil of the second relay LS4 is controlled through the controller U1. The signal output end of the controller U1 is connected with the coil of the first relay LS5 through the first program control switch Q2, so that the on-off of the coil of the first relay LS5 is controlled through the controller U1.
The power input end and the grounding end of the first current sensor U4 are connected through a twentieth capacitor C20, and the signal output point of the first current sensor U4 is connected with the positive input end of the first signal amplifier U5 through a twenty-second resistor R22; the model of the first current sensor U4 is LESR25HP, the reference voltage port Vref of the first current sensor U4 is connected with the reverse input end of the first signal amplifier U5 through a nineteenth resistor R19, the model of the first signal amplifier U5 is AD8226ARMZ, the RG1 end of the AD8226ARMZ chip is connected with the RG2 end of the AD8226ARMZ chip through a twenty-first resistor R20, the power supply positive electrode access end V+ of the first signal amplifier U5 is connected with a power supply, the reference voltage end REF of the first signal amplifier U5 and the power supply negative electrode access end V-are grounded, the power supply positive electrode access end of the first signal amplifier U5 is also filtered through a twenty-second capacitor C22, the output end Vo of the first signal amplifier U5 outputs an O_V_HSD signal through a twenty-first resistor R21, and the O_V_HSD signal output end is filtered through a twenty-third capacitor C23.
The power input end and the grounding end of the second current sensor U7 are connected through a twenty-seventh capacitor C27, and the signal output point of the second current sensor U7 is connected with the positive input end of the second signal amplifier U6 through a twenty-sixth resistor R26; the model of the second current sensor U7 is LESR25HP, the reference voltage port Vref of the second current sensor U7 is connected with the reverse input end of the second signal amplifier U6 through a twenty-third resistor R23, the model of the second signal amplifier U6 is AD8226ARMZ, the RG1 end of the AD8226ARMZ chip is connected with the RG2 end of the AD8226ARMZ chip through a twenty-fourth resistor R24, the power supply positive electrode access end V+ of the second signal amplifier U6 is connected with a power supply, the reference voltage end REF and the power supply negative electrode access end V-of the second signal amplifier U6 are grounded, the power supply positive electrode access end of the second signal amplifier U6 is filtered through a twenty-fifth capacitor C25, the output end Vo of the second signal amplifier U6 outputs an O_V_LSD signal through a twenty-fifth resistor R25, and the O_V_LSD signal output end is filtered through a twenty-sixth capacitor C26.
If the tested driving circuit is a grounding loop, namely a grounding loop is loaded at the end of the I_S_LSD/HSD, one end of the power load R29 is communicated with the grounding loop through a second current sensor U7, and an O_V_TEST signal which is communicated with the auxiliary power supply and is accessed at the other end of the power load R29 is a positive voltage signal; when the second current information is amplified to be at a high level, the current measured by the second current sensor U7 is not 0, and the grounding loop is a passage; when the second current information is amplified and then is at a low level, the current measured by the second current sensor U7 is 0, and the grounding loop is open; when the tested driving circuit is a power supply circuit, the tested driving circuit is a power supply circuit loaded at the end I_S_LSD/HSD, one end of the power load R29 is communicated with the power supply circuit through a first current sensor U4, and the other end of the power load R29 is grounded; when the first current information is amplified and then is at a high level, the current measured by the first current sensor U7 is not 0, and the power supply circuit is a passage; when the first current information is amplified and then is at a low level, the ground loop is broken when the current measured by the first current sensor U4 is 0.
As shown in fig. 1 and 2, in some embodiments, the positive electrode of the input end of the first photo-coupler U9 is connected to the power supply through the twenty-seventh resistor R27, the positive electrode of the input end of the first photo-coupler U9 is connected to the output end of the first schmitt trigger U8A, and the negative electrode of the input end of the first photo-coupler U9 is grounded; the input end of the first schmitt trigger U8A is connected with the signal output end of the controller U1.
The positive electrode of the output end of the first photoelectric coupler U9 is connected to a power supply through the twenty-eighth resistor R28, and the negative electrode of the output end of the first photoelectric coupler U9 is grounded; the positive electrode of the output end of the first photoelectric coupler U9 is respectively connected with the base electrode of the second programmable switch Q1 and the base electrode of the first programmable switch Q2, the emitter electrode of the second programmable switch Q1 is grounded, and the base electrode of the second programmable switch Q1 and the coil string of the second relay LS4 are connected with a power supply; the emitter of the first programmable switch Q2 is grounded, and the base of the first programmable switch Q2 and the coil string of the first relay LS5 are connected with a power supply.
In some specific embodiments, the positive electrode of the input end of the second photo-coupler U10 is connected to one end of the power load R29, the negative electrode of the input end of the second photo-coupler U10 is grounded, the positive electrode of the output end of the second photo-coupler U10 is connected to a power supply through the thirty-th resistor R30, and the negative electrode of the output end of the second photo-coupler U10 is grounded; the input end of the second schmitt trigger U8B is connected with the positive electrode of the output end of the second photoelectric coupler U10, and the output end of the second schmitt trigger U8B is connected with the signal input end of the controller U1. The positive pole of the constant current diode D3 is connected with one end of the power load R29, and the negative pole of the constant current diode D3 is grounded to provide constant current for the light emitting diode loop of the second photoelectric coupler U10. The positive electrode of the constant current diode D3 is connected to the negative electrode of the transient suppression diode D5, and the positive electrode of the transient suppression diode D5 is grounded to limit the peak voltage of the light emitting diode loop of the second photo coupler U10.
As shown in FIG. 3, the controller U1 is specifically a SAK-TC234L single-chip microcomputer. The first capacitor C1, the second capacitor C2, the third capacitor C3, the fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6, the seventh capacitor C7, the eighth capacitor C8, the ninth capacitor C9, the tenth capacitor C10 and the eleventh capacitor C11 are power port filter capacitors of the SAK-TC234L singlechip. The first resistor R1, the second resistor R2, the third resistor R3, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, the seventh resistor R7, the eighth resistor R8, the ninth resistor R9, the tenth resistor R10 and the eleventh resistor R11 are configuration resistors of the SAK-TC234L singlechip. The crystal oscillator Y1, the twelfth capacitor C12, the twelfth resistor R12, the thirteenth capacitor C13 and the thirteenth resistor R13 together form a crystal oscillator configuration circuit of the SAK-TC234L singlechip. Seventeenth electric capacity C17, eighteenth electric capacity C18 and nineteenth electric capacity C19 are the analog power port filter capacitance of SAK-TC234L singlechip.
As shown in FIG. 1, the detection of the high-low side switch also comprises an external communication module and an upper computer; the controller U1 is in communication connection with the upper computer through the external communication module,
the controller U1 is connected with the tested driving circuit through the external communication module to acquire the type information of the tested driving circuit;
The controller U1 is in communication connection with the upper computer through the external communication module, so that the upper computer receives a test result through the controller U1; the test result comprises type information, on-off information and current information of the tested driving circuit; the current information is the first current information or the second current information. And the upper computer is used for receiving the detection result information, so that the test result can be stored and displayed conveniently through the upper computer.
As shown in fig. 4, the external communication module includes a CAN transceiver, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, two zener diodes D1, a fourteenth capacitor C14, a fifteenth capacitor C15, and a sixteenth capacitor C16; the data receiving end of the CAN transceiver is connected with the signal transmitting end of the controller U1 through the seventeenth resistor R17, and the data transmitting end of the CAN transceiver is connected with the signal receiving end of the controller U1; the high-speed CAN bus end of the CAN transceiver is grounded through the sixteenth resistor R16 and the sixteenth capacitor C16 which are connected in series, the high-speed CAN bus end of the CAN transceiver is grounded through the fifteenth capacitor C15 which is connected in series, and the high-speed CAN bus end of the CAN transceiver is grounded through one of the zener diodes D1 which is connected in series; the low-speed CAN bus end of the CAN transceiver is grounded through the eighteenth resistor R18 and the sixteenth capacitor C16 which are connected in series; the low-speed CAN bus end of the CAN transceiver is grounded through the fourteenth capacitor C14 connected in series, and the low-speed CAN bus end of the CAN transceiver is grounded through the other zener diode D1 connected in series; and the high-speed CAN bus end of the CAN transceiver and the low-speed CAN bus end of the CAN transceiver are respectively connected with the upper computer.
As shown in fig. 5, the power load R29 includes a darlington tube array chip U2, a third relay LS1, a fourth relay LS2, a fifth relay LS3, a twelfth resistor R12, a fourteenth resistor R14, and a fifteenth resistor R15; the output end of the darlington tube array chip U2 is respectively connected with one end of the coil of the third relay LS1, one end of the coil of the fourth relay LS2 and one end of the coil of the fifth relay LS 3; the other end of the coil of the third relay LS1, the other end of the coil of the fourth relay LS2 and the other end of the coil of the fifth relay LS3 are all connected to a power supply.
The movable contact of the third relay LS1, the movable contact of the fourth relay LS2 and the movable contact of the fifth relay LS3 are all connected with the movable contact of the first relay LS 5; the normally open contact or normally closed contact of the third relay LS1 is connected with the movable contact of the second relay LS4 through the twelfth resistor R12, the normally open contact or normally closed contact of the fourth relay LS2 is connected with the movable contact of the second relay LS4 through the fourteenth resistor R14, and the normally open contact or normally closed contact of the fifth relay LS3 is connected with the movable contact of the second relay LS4 through the fifteenth resistor R15.
The input end of the darlington tube array chip U2 is connected with the output end of the controller U1, so that the controller U1 can respectively control the on-off of the coils of the third relay LS1, the fourth relay LS2 and the fifth relay LS3 through the darlington tube array chip U2; the voltage signal is the voltage at the moving contact of the second relay LS 4.
In some embodiments, a method for detecting a high-low side switch is further provided, which is applied to the high-low side switch detection circuit, and the specific method is as follows:
a high-low side switch detection method is applied to the high-low side switch detection circuit, and comprises the following steps:
acquiring the type information of the tested driving circuit by using the controller U1;
the controller U1 judges the type of the tested driving circuit according to the type information; when the type information is high-side switch information, the tested driving circuit is judged to be a power supply circuit; when the type information is low-side switch information, judging that the tested driving circuit is a grounding loop;
when the tested driving circuit is judged to be a power supply circuit, the controller U1 sends first control information to the first relay LS5 so as to control the movable contact of the first relay LS5 to be communicated with the second fixed contact of the first relay LS 5;
The controller U1 is used for monitoring a voltage signal at one end of the power load R29, and judging the on-off state of the power supply circuit according to the voltage signal; when the voltage signal is a high-level signal, the power supply circuit is a passage; when the voltage signal is a low-level signal, the power supply circuit is disconnected;
when the tested driving circuit is judged to be a grounding loop, the controller U1 sends second control information to the first relay LS5 so as to control the movable contact of the first relay LS5 to be communicated with the first static contact of the first relay LS 5;
the controller U1 is used for monitoring a voltage signal at one end of the power load R29, and judging the on-off state of the power supply circuit according to the voltage signal; when the voltage signal is a low-level signal, judging that the grounding loop is a passage; and when the voltage signal is a high-level signal, judging that the grounding loop is open-circuited.
If the tested driving circuit is a grounding loop, one end of the power load R29 is communicated with the grounding loop, and the other end of the power load R29 is communicated with the auxiliary power supply; when the voltage signal is a low level signal, the ground loop is a path; when the voltage signal is a high level signal, the ground loop is open.
If the tested driving circuit is a power supply circuit, one end of the power load R29 is communicated with the power supply circuit, and the other end of the power load R29 is grounded; when the voltage signal is a low-level signal, the power supply circuit is open-circuited; when the voltage signal is a high level signal, the power supply circuit is a channel.
The method for detecting the high-low side switch further comprises the following steps:
receiving, by using the controller U1, first current information of a branch where the first current sensor U4 is located and second current information of a branch where the second current sensor U7 is located;
and judging the on-off state of the tested driving circuit, calculating the current of the tested driving circuit and judging the current carrying capacity of the tested driving circuit by using the controller U1 according to the first current information or the second current information.
The method for calculating the current of the tested driving circuit comprises the following steps: because the first current sensor U4 and the second current sensor U7 are hall current sensors, the output signals thereof are voltage signals, and the controller U1 calculates the current of the tested driving circuit according to the voltage signals output by the first current sensor U4 or the second current sensor U7.
The circuit is added with a CAN communication interface, namely the CAN transceiver, and performs data exchange with the tested equipment, so that the driving current calculated by the main control chip, namely the controller U1, and the current tested by the tested equipment CAN be checked, and the detection performance is improved. The circuit is additionally provided with a CAN communication interface to exchange data with the tested equipment, the controller U1 reads the type information of the tested driving circuit, namely a power supply circuit or a grounding loop, through a CAN transceiver to control the I_S_RELAY output signal, the same test channel CAN be automatically adapted to different switch types, and the I_S_RELAY output signal CAN be controlled according to a basic test principle under the condition that the switch types of the tested equipment are known.
The circuit is additionally provided with a CAN communication interface to exchange data with the tested equipment, the controller U1 reads the type information of the switch type of the tested equipment, namely the type information of the tested driving circuit, controls the I_S_RELAY output signal, reads the O_S_ST.HSD/LSD state, CAN verify the type information of the tested driving circuit, and improves the test reliability. The CAN communication interface is added in the circuit, and the test result CAN be displayed on the upper computer through the controller U1.
In some embodiments, the detected driving circuit CAN be controlled to be turned on or off by a control chip such as a singlechip or an MCU, so that the controller U1 CAN determine the type of the detected driving circuit by acquiring specific characters in data of the singlechip or the MCU of the detected driving circuit in CAN communication. For example, the CAN communication protocol specifies that a certain bit in data between the controller U1 and the driving circuit to be tested is a binary "1" to indicate that the driving circuit to be tested is a power supply circuit, and a certain bit is a binary "0" to indicate that the driving circuit to be tested is a ground circuit.
The power load R29 is changed into a program-controlled power load, the end A of the program-controlled resistor is connected with the end A of the power load R29, the end B of the program-controlled resistor is connected with the end B of the power load R29, the main control chip is used for controlling the on-off of the third relay LS1, the fourth relay LS2 and the fifth relay LS3 so as to change the resistance value of the twelfth resistor R12, the fourteenth resistor R14 and the fifteenth resistor R15 after being connected in parallel, the program-controlled resistor function is realized, the high-low side switch test with different current carrying capacity can be adapted, the overcurrent protection function of the high-low side switch can be tested by changing the power load value through program control, and when the overcurrent is carried out, the high-low side switch can be automatically protected and switched into an off state, and the overcurrent protection function can be judged by comparing the switch state sent by the tested equipment and the switch state read by the test circuit.
In other embodiments, the first amplifier U5 and the second amplifier U6 may be preferably program controlled amplifiers, and the controller U1 is used to control the amplification factors of the first amplifier U5 and the second amplifier U6, so that the same test circuit can expand the test range of the current carrying capability of the high-low side switch without changing hardware.
In other embodiments, the auxiliary power to which the i_v_test port is connected may be changed to a programmable adjustable power supply or a voltage adjustable power supply to adapt to the high-side switch driving channel TEST of different voltages.
According to the embodiment of the invention, the relay is used for controlling whether the other end of the power load R29 is grounded or connected with a power supply so as to switch on and off of a tested driving circuit loaded on one end of the power load R29, so that the compatibility test of the high-low side switch, namely the power supply circuit and the grounding circuit in the invention can be realized, and a test circuit is not required to be arranged respectively, so that the test of the high-low side switch is more convenient and economical.
The invention does not need to distinguish high-low side switch channels of the tested equipment, the high-low side switch is simultaneously connected with the I_S_LSD/HSD port, and the same circuit can adapt to the test of the high-low side switch by controlling the I_S_RELAY signal, change the resistance value of the power load R29 and adapt to the high-low side switch test integration level with different capacities. Meanwhile, the invention can be designed into a multi-channel circuit, and the quantity and the stability of the test equipment are reduced and high under the condition that the tested equipment has more driving channels; the power driving circuit and the signal acquisition circuit of the test circuit are isolated, and the test functions of improving the stability and measuring accuracy of the system are complete. When the circuit is applied in an expanding way, the same circuit can automatically realize the test of the high-low side switch type, the high-low side switch state, the current carrying capacity of the high-low side switch and the overcurrent protection function of the high-low side switch.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims (10)

1. The high-low side switch detection circuit is characterized by comprising a power load (R29), a first relay (LS 5) and a controller (U1), wherein a fixed contact of the first relay (LS 5) comprises a first fixed contact and a second fixed contact;
one end of the power load (R29) is connected with a peripheral interface, and the peripheral interface is used for accessing a tested driving circuit; the other end of the power load (R29) is connected with a movable contact of the first relay (LS 5); a first static contact of the first relay (LS 5) is connected with an auxiliary power supply, and a second static contact of the first relay (LS 5) is grounded;
the signal input end of the controller (U1) is connected with the tested driving circuit and is used for acquiring type information of the tested driving circuit;
the signal output end of the controller (U1) is connected with the first relay (LS 5) so as to control the first relay (LS 5) according to the type information;
under the control of the controller (U1), the movable contact of the first relay (LS 5) is alternatively connected with the first fixed contact or the second fixed contact;
The signal input end of the controller (U1) is also connected with one end of the power load (R29) and is used for monitoring a voltage signal at one end of the power load (R29) and judging the on-off state of the tested driving circuit according to the voltage signal.
2. The high-low side switch detection circuit according to claim 1, further comprising a second relay (LS 4), a first current sensor (U4) and a second current sensor (U7), wherein the stationary contacts of the second relay (LS 4) comprise a first stationary contact and a second stationary contact;
the negative electrode of the power input end of the first current sensor U4 is connected with the first static contact of the second relay (LS 4), and the positive electrode of the power input end of the second current sensor U7 is connected with the second static contact of the second relay (LS 4);
the positive electrode of the power input end of the first current sensor (U4) and the negative electrode of the power input end of the second current sensor (U7) are both connected with the peripheral interface;
the signal output end of the controller (U1) is also connected with the second relay (LS 4) so as to control the second relay (LS 4) according to the type information;
under the control of the controller (U1), the movable contact of the second relay (LS 4) is alternatively connected with the first fixed contact or the second fixed contact;
The signal input end of the controller (U1) is respectively connected with the current signal output end of the first current sensor (U4) and the current signal output end of the second current sensor (U7) and is used for receiving first current information of a branch where the first current sensor (U4) is located and second current information of a branch where the second current sensor (U7) is located;
the controller (U1) is also used for judging the on-off state of the tested driving circuit, calculating the current of the tested driving circuit and judging the current carrying capacity of the tested driving circuit according to the first current information or the second current information.
3. The high-low side switch detection circuit according to claim 2, further comprising a first signal amplifier (U5) and a second signal amplifier (U6), wherein the first current sensor (U4) and the second current sensor (U7) are hall current sensors;
the current signal output end of the first current sensor (U4) is connected with the controller (U1) through the first signal amplifier (U5), and the first signal amplifier (U5) is used for amplifying the first current information;
the current signal output end of the second current sensor (U7) is connected with the controller (U1) through the second signal amplifier (U6), and the second signal amplifier (U6) is used for amplifying the second current information.
4. A high-low side switch detection circuit according to claim 2, further comprising a second programmable switch (Q1) and a first programmable switch (Q2);
the signal output end of the controller (U1) is connected with the coil of the second relay (LS 4) through the second program-controlled switch (Q1) so as to control the on-off of the coil of the second relay (LS 4) through the controller (U1);
the signal output end of the controller (U1) is connected with the coil of the first relay (LS 5) through the first program-controlled switch (Q2) so as to control the on-off of the coil of the first relay (LS 5) through the controller (U1).
5. The high-low side switch detection circuit according to claim 4, further comprising a first photo coupler (U9), a twenty-eighth resistor (R28), a twenty-seventh resistor (R27), and a first schmitt trigger (U8A); the second program-controlled switch (Q1) and the first program-controlled switch (Q2) are switching tubes;
the positive electrode of the input end of the first photoelectric coupler (U9) is connected with a power supply through the twenty-seventh resistor (R27), the positive electrode of the input end of the first photoelectric coupler (U9) is connected with the output end of the first Schmitt trigger (U8A), and the negative electrode of the input end of the first photoelectric coupler (U9) is grounded; the input end of the first Schmitt trigger (U8A) is connected with the signal output end of the controller (U1);
The positive electrode of the output end of the first photoelectric coupler (U9) is connected to a power supply through the twenty-eighth resistor (R28), and the negative electrode of the output end of the first photoelectric coupler (U9) is grounded;
the positive electrode of the output end of the first photoelectric coupler (U9) is respectively connected with the base electrode of the second programmable switch (Q1) and the base electrode of the first programmable switch (Q2), the emitter electrode of the second programmable switch (Q1) is grounded, and the base electrode of the second programmable switch (Q1) and the coil of the second relay (LS 4) are connected in series with a power supply;
the emitter of the first programmable switch (Q2) is grounded, and the base of the first programmable switch (Q2) and the coil string of the first relay (LS 5) are connected with a power supply.
6. The high-low side switch detection circuit according to claim 5, further comprising an external communication module and an upper computer;
the controller (U1) is connected with the tested driving circuit through the external communication module so as to acquire the type information of the tested driving circuit;
the controller (U1) is in communication connection with the upper computer through the external communication module, so that the upper computer receives a test result through the controller (U1); the test result comprises type information, on-off information and current information of the tested driving circuit; the current information is the first current information or the second current information.
7. The high-low side switch detection circuit according to claim 6, wherein the external communication module comprises a CAN transceiver, a sixteenth resistor (R16), a seventeenth resistor (R17), an eighteenth resistor (R18), two zener diodes (D1), a fourteenth capacitor (C14), a fifteenth capacitor (C15), and a sixteenth capacitor (C16);
the data receiving end of the CAN transceiver is connected with the signal transmitting end of the controller (U1) through the seventeenth resistor (R17), and the data transmitting end of the CAN transceiver is connected with the signal receiving end of the controller (U1);
the high-speed CAN bus end of the CAN transceiver is grounded through the sixteenth resistor R16) and the sixteenth capacitor (C16) which are connected in series, the high-speed CAN bus end of the CAN transceiver is grounded through the fifteenth capacitor (C15) which is connected in series, and the high-speed CAN bus end of the CAN transceiver is grounded through one of the zener diodes (D1) which is connected in series;
the low-speed CAN bus end of the CAN transceiver is grounded through the eighteenth resistor (R18) and the sixteenth capacitor (C16) which are connected in series; the low-speed CAN bus end of the CAN transceiver is grounded through the fourteenth capacitor (C14) connected in series, and the low-speed CAN bus end of the CAN transceiver is grounded through the other zener diode (D1) connected in series;
And the bus end of the CAN transceiver is respectively connected with the upper computer and the tested driving circuit.
8. The high-low side switch detection circuit according to any one of claims 1 to 7, further comprising a second photo coupler (U10), a thirty-first resistor (R30) and a second schmitt trigger (U8B);
the positive electrode of the input end of the second photoelectric coupler (U10) is connected with one end of the power load (R29), the negative electrode of the input end of the second photoelectric coupler (U10) is grounded, the positive electrode of the output end of the second photoelectric coupler (U10) is connected with a power supply through the thirty-th resistor (R30), and the negative electrode of the output end of the second photoelectric coupler (U10) is grounded;
the input end of the second Schmitt trigger (U8B) is connected with the positive electrode of the output end of the second photoelectric coupler (U10), and the output end of the second Schmitt trigger (U8B) is connected with the signal input end of the controller (U1).
9. The high-low side switch detection circuit according to any one of claims 1 to 8, wherein the power load (R29) comprises a darlington tube array chip (U2), a third relay (LS 1), a fourth relay (LS 2), a fifth relay (LS 3), a twelfth resistor (R12), a fourteenth resistor (R14), and a fifteenth resistor (R15);
The output end of the Darlington tube array chip (U2) is respectively connected with one end of a coil of the third relay (LS 1), one end of a coil of the fourth relay (LS 2) and one end of a coil of the fifth relay (LS 3); the other end of the coil of the third relay (LS 1), the other end of the coil of the fourth relay (LS 2) and the other end of the coil of the fifth relay (LS 3) are connected with power supplies;
the movable contact of the third relay (LS 1), the movable contact of the fourth relay (LS 2) and the movable contact of the fifth relay (LS 3) are all connected with the movable contact of the first relay (LS 5); the normally open contact or normally closed contact of the third relay (LS 1) is connected with the movable contact of the second relay (LS 4) through the twelfth resistor (R12), the normally open contact or normally closed contact of the fourth relay (LS 2) is connected with the movable contact of the second relay (LS 4) through the fourteenth resistor (R14), and the normally open contact or normally closed contact of the fifth relay (LS 3) is connected with the movable contact of the second relay (LS 4) through the fifteenth resistor (R15);
the input end of the Darlington tube array chip (U2) is connected with the output end of the controller (U1), so that the controller (U1) respectively controls the on-off of the coils of the third relay (LS 1), the fourth relay (LS 2) and the fifth relay (LS 3) through the Darlington tube array chip (U2); the voltage signal is the voltage at the moving contact of the second relay (LS 4).
10. A method for detecting a high-low side switch according to any one of claims 1 to 9, comprising the steps of:
acquiring the type information of the tested driving circuit by using the controller (U1);
the controller (U1) judges the type of the tested driving circuit according to the type information; when the type information is high-side switch information, the tested driving circuit is judged to be a power supply circuit; when the type information is low-side switch information, judging that the tested driving circuit is a grounding loop;
when the tested driving circuit is judged to be a power supply circuit, the controller (U1) sends first control information to the first relay (LS 5) so as to control the movable contact of the first relay (LS 5) to be communicated with the second fixed contact of the first relay (LS 5);
monitoring a voltage signal at one end of the power load (R29) by using the controller (U1), and judging the on-off state of the power supply circuit according to the voltage signal; when the voltage signal is a high-level signal, the power supply circuit is a passage; when the voltage signal is a low-level signal, the power supply circuit is disconnected;
When the tested driving circuit is judged to be a grounding loop, the controller (U1) sends second control information to the first relay (LS 5) so as to control the movable contact of the first relay (LS 5) to be communicated with the first static contact of the first relay (LS 5);
monitoring a voltage signal at one end of the power load (R29) by using the controller (U1), and judging the on-off state of the power supply circuit according to the voltage signal; when the voltage signal is a low-level signal, judging that the grounding loop is a passage; and when the voltage signal is a high-level signal, judging that the grounding loop is open-circuited.
CN202311251378.4A 2023-09-26 2023-09-26 High-low side switch detection circuit and method Active CN117310442B (en)

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Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011191192A (en) * 2010-03-15 2011-09-29 Rohm Co Ltd Semiconductor device and testing device of the same
CN105675958A (en) * 2016-01-27 2016-06-15 佛山市南海区联合广东新光源产业创新中心 Circuit for detecting current in LED chip
CN106249801A (en) * 2016-08-30 2016-12-21 安徽艾可蓝环保股份有限公司 A kind of drive circuit of multiple protective
CN107910949A (en) * 2017-12-01 2018-04-13 江苏科技大学 One kind is stopped in emergency circuit and its implementation
CN108170054A (en) * 2017-12-27 2018-06-15 上海辰竹仪表有限公司 Intelligent and safe relay and its application circuit
CN208027164U (en) * 2018-01-31 2018-10-30 北京智行鸿远汽车有限公司 High-low side output can match circuit and the detection device including the circuit and system
WO2019128662A1 (en) * 2017-12-27 2019-07-04 上海辰竹仪表有限公司 Intelligent safety relay and circuits applied thereby
DE102018112236B3 (en) * 2018-05-22 2019-09-05 Elmos Semiconductor Aktiengesellschaft Operating state-dependent fully automatic determination of the current measuring point in half bridges and full bridges by current sign detection
WO2021036960A1 (en) * 2019-08-30 2021-03-04 宁德时代新能源科技股份有限公司 Detection circuit and detection method for electric control device, and electric vehicle
CN112684337A (en) * 2021-01-29 2021-04-20 东莞钜威动力技术有限公司 Fault diagnosis circuit for switching element, method thereof and electronic device
JP2021131341A (en) * 2020-02-21 2021-09-09 株式会社デンソー Load drive circuit
CN219105049U (en) * 2022-10-27 2023-05-30 湖北亿纬动力有限公司 Battery management system test fixture

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011191192A (en) * 2010-03-15 2011-09-29 Rohm Co Ltd Semiconductor device and testing device of the same
CN105675958A (en) * 2016-01-27 2016-06-15 佛山市南海区联合广东新光源产业创新中心 Circuit for detecting current in LED chip
CN106249801A (en) * 2016-08-30 2016-12-21 安徽艾可蓝环保股份有限公司 A kind of drive circuit of multiple protective
CN107910949A (en) * 2017-12-01 2018-04-13 江苏科技大学 One kind is stopped in emergency circuit and its implementation
WO2019128662A1 (en) * 2017-12-27 2019-07-04 上海辰竹仪表有限公司 Intelligent safety relay and circuits applied thereby
CN108170054A (en) * 2017-12-27 2018-06-15 上海辰竹仪表有限公司 Intelligent and safe relay and its application circuit
CN208027164U (en) * 2018-01-31 2018-10-30 北京智行鸿远汽车有限公司 High-low side output can match circuit and the detection device including the circuit and system
DE102018112236B3 (en) * 2018-05-22 2019-09-05 Elmos Semiconductor Aktiengesellschaft Operating state-dependent fully automatic determination of the current measuring point in half bridges and full bridges by current sign detection
WO2021036960A1 (en) * 2019-08-30 2021-03-04 宁德时代新能源科技股份有限公司 Detection circuit and detection method for electric control device, and electric vehicle
CN112444722A (en) * 2019-08-30 2021-03-05 宁德时代新能源科技股份有限公司 Detection circuit and detection method of electric control device
JP2021131341A (en) * 2020-02-21 2021-09-09 株式会社デンソー Load drive circuit
CN112684337A (en) * 2021-01-29 2021-04-20 东莞钜威动力技术有限公司 Fault diagnosis circuit for switching element, method thereof and electronic device
CN219105049U (en) * 2022-10-27 2023-05-30 湖北亿纬动力有限公司 Battery management system test fixture

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
邢博;唐岚;王普;朱加豪;刘长伟;: "基于飞思卡尔某芯片的VCU硬件检测平台设计", 技术与市场, no. 09, 15 September 2017 (2017-09-15) *

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