CN117269642A - Signal generation circuit for testing vehicle-standard-level transient immunity - Google Patents

Signal generation circuit for testing vehicle-standard-level transient immunity Download PDF

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CN117269642A
CN117269642A CN202311123556.5A CN202311123556A CN117269642A CN 117269642 A CN117269642 A CN 117269642A CN 202311123556 A CN202311123556 A CN 202311123556A CN 117269642 A CN117269642 A CN 117269642A
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voltage
pulse
circuit
capacitor
controlled
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齐钊
陈泓全
魏敬奇
乔明
周锌
张波
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Chongqing Institute Of Microelectronics Industry Technology University Of Electronic Science And Technology
University of Electronic Science and Technology of China
Guangdong Electronic Information Engineering Research Institute of UESTC
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Chongqing Institute Of Microelectronics Industry Technology University Of Electronic Science And Technology
University of Electronic Science and Technology of China
Guangdong Electronic Information Engineering Research Institute of UESTC
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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
    • G01R31/003—Environmental or reliability tests
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/30—Structural combination of electric measuring instruments with basic electronic circuits, e.g. with amplifier
    • 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
    • G01R31/005—Testing of electric installations on transport means
    • G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks

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  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)

Abstract

The invention provides a signal generating circuit for testing the transient immunity of a vehicle-standard, which realizes waveform 1 in a vehicle-standard surge test standard ISO7637 by a two-level discharge waveform superposition principle. According to ISO7637, when an inductive load such as a heating system of a power seat or seat in an automobile is disconnected from a power supply, since the inductive load in the circuit needs to maintain the original current, the voltage pulse generated by the inductive load will cause interference to the electronic components connected in parallel with the inductive load. The output waveform of the novel generating circuit provided by the invention simulates the waveform, and provides a novel source circuit for the work of chip design, protection device design and simulation, pulse test circuit design and the like.

Description

一种用于车规级瞬态抗扰能力测试的信号发生电路A signal generation circuit for vehicle-level transient immunity testing

技术领域Technical field

本发明属于集成电路科学与工程领域，尤其涉及用于车规级瞬态抗扰能力测试的信号产生电路。具体是指用于ISO7637波形的发生电路实现方法。The invention belongs to the field of integrated circuit science and engineering, and particularly relates to a signal generation circuit used for vehicle-level transient immunity testing. Specifically, it refers to the generation circuit implementation method for ISO7637 waveform.

背景技术Background technique

随着现代汽车工业的发展，使得大量的车载电子设备广泛应用于汽车，如车载卫星导航系统、车载影音娱乐系统、车身照明系统、防盗系统、自动空调系统等。随着汽车控制系统复杂度越来越高，需要传输的数据量也越来越大，车辆内部电子控制单元和电子元器件数量越来越多。然而，在汽车的运行过程中，由于车内电磁环境及其外部环境较为恶劣，汽车的正常工作也会产生大量的电气瞬变和电磁干扰，他们通过耦合、传导、辐射等方式来影响汽车电子设备的工作。由于汽车产品在使用上的特殊性，这些电子设备的运行状态就和汽车的安全行驶有着很大的关系，一旦汽车上零部件的瞬态抗扰性不能达到相应的防护等级，汽车的行驶安全，元器件寿命，以及整车质量就不能得到保障。从而造成财产损失，甚至危及人身安全，所以汽车的瞬态抗扰标准极其严格。With the development of the modern automobile industry, a large number of in-vehicle electronic devices are widely used in automobiles, such as in-vehicle satellite navigation systems, in-vehicle audio and video entertainment systems, body lighting systems, anti-theft systems, automatic air conditioning systems, etc. As automobile control systems become more and more complex, the amount of data that needs to be transmitted is also increasing, and the number of electronic control units and electronic components inside the vehicle is increasing. However, during the operation of the car, due to the harsh electromagnetic environment inside the car and the harsh external environment, the normal operation of the car will also produce a large number of electrical transients and electromagnetic interference, which affect the automotive electronics through coupling, conduction, radiation, etc. equipment work. Due to the particularity of the use of automotive products, the operating status of these electronic devices has a great relationship with the safe driving of the car. Once the transient immunity of the parts on the car cannot reach the corresponding protection level, the driving safety of the car will be affected. , the life of components and the quality of the vehicle cannot be guaranteed. This can cause property damage and even endanger personal safety, so the transient immunity standards for automobiles are extremely strict.

为此，国际标准化组织制定了《ISO7637》，该标准规定了汽车电子中瞬态电发射的测试方法，并定义了典型的测试脉冲，用于评价被测设备对瞬态事件的抗扰能力。根据《ISO7637》描述，当汽车内电动座椅或座椅的加热系统等感性负载与电源断开时，由于电路中的感性负载需要维持原来的电流，其产生的电压脉冲将对与其并联的电子部件造成干扰。如图一所示，上述的瞬态干扰的特征为：负电压脉冲波形，对于12V和24V的车辆，脉冲的上升时间分别为1(-0.5,+0)μs和3(-1.5,+0)μs；脉冲的下降时间分别为2000(±400)μs和1000(±200)μs；脉冲下降初期下降速度较快，后期下降速度变慢。然而标准中并没有明确规定该波形的产生电路，这对防护器件的仿真设计过程带来了一定的难度。To this end, the International Organization for Standardization has formulated "ISO7637", which specifies the test method for transient electrical emissions in automotive electronics and defines typical test pulses to evaluate the immunity of the device under test to transient events. According to "ISO7637", when inductive loads such as electric seats or seat heating systems in cars are disconnected from the power supply, because the inductive loads in the circuit need to maintain the original current, the voltage pulses they generate will affect the electronics connected in parallel with them. components causing interference. As shown in Figure 1, the characteristics of the above-mentioned transient interference are: negative voltage pulse waveform. For 12V and 24V vehicles, the rise time of the pulse is 1(-0.5,+0)μs and 3(-1.5,+0) respectively. )μs; the falling times of the pulses are 2000 (±400) μs and 1000 (±200) μs respectively; the pulse decreases faster in the initial stage and slower in the later stage. However, the standard does not clearly stipulate the generation circuit of this waveform, which brings certain difficulties to the simulation and design process of protective devices.

发明内容Contents of the invention

针对上述情况，本发明要解决的技术问题是：提供一种脉冲产生电路，用于产生与测试标准高度吻合的电压脉冲波形，使能准确地评估汽车电子中电子元器件的稳定性和可靠性。In view of the above situation, the technical problem to be solved by the present invention is to provide a pulse generation circuit for generating a voltage pulse waveform that is highly consistent with the test standard, so as to accurately evaluate the stability and reliability of electronic components in automotive electronics. .

为实现上述发明目的，本发明技术方案如下：In order to achieve the above-mentioned object of the invention, the technical solutions of the present invention are as follows:

一种用于车规级瞬态抗扰能力测试的信号发生电路，包括：第一脉冲控制的周期充电电路100、第二脉冲控制的周期充电电路200、第一放电电路300及第二放电电路400；其中，第一脉冲控制的周期充电电路100、第二脉冲控制的周期充电电路200、第一放电电路300及第二放电电路400各自并联；A signal generation circuit for vehicle-level transient immunity testing, including: a first pulse-controlled periodic charging circuit 100, a second pulse-controlled periodic charging circuit 200, a first discharge circuit 300 and a second discharge circuit 400; wherein the first pulse-controlled periodic charging circuit 100, the second pulse-controlled periodic charging circuit 200, the first discharging circuit 300 and the second discharging circuit 400 are each connected in parallel;

所述第一脉冲控制的周期充电电路100用于对第一电容07进行周期性充电，使第一电容07两端的电压达到预设的电压等级，并通过第一放电电路300周期性放电，产生第一放电电流；第一脉冲控制的周期充电电路100的第一端与第一放电电路300的第一端相连，所述第一脉冲控制的周期充电电路100的第二端与第一放电电路300的第二端共同接地；The first pulse-controlled periodic charging circuit 100 is used to periodically charge the first capacitor 07 so that the voltage across the first capacitor 07 reaches a preset voltage level, and is periodically discharged through the first discharge circuit 300 to generate The first discharge current; the first end of the first pulse-controlled periodic charging circuit 100 is connected to the first end of the first discharging circuit 300, and the second end of the first pulse-controlled periodic charging circuit 100 is connected to the first discharging circuit. The second terminal of 300 is commonly grounded;

所述第二脉冲控制的周期充电电路200用于对第二电容08进行周期性充电，使第二电容08两端的电压达到预设的电压等级，并通过第二放电电路400周期性放电，产生第二放电电流；第二脉冲控制的周期充电电路200第一端与第二放电电路400的第一端相连，所述第二脉冲控制的周期充电电路200的第二端与第二放电电路400的第二端共同接地；The second pulse-controlled periodic charging circuit 200 is used to periodically charge the second capacitor 08 so that the voltage across the second capacitor 08 reaches a preset voltage level, and is periodically discharged through the second discharge circuit 400 to generate The second discharge current; the first terminal of the second pulse-controlled periodic charging circuit 200 is connected to the first terminal of the second discharging circuit 400, and the second terminal of the second pulse-controlled periodic charging circuit 200 is connected to the second discharging circuit 400. The second end is commonly grounded;

第一放电电路300用于泄放由第一电容07放电形成的第一电流；所述第一放电电路300的第一端与第一脉冲控制的周期充电电路100的第一端相连，所述第一放电电路300的第二端与第一脉冲控制的周期充电电路100的第二端共同接地；The first discharge circuit 300 is used to discharge the first current formed by the discharge of the first capacitor 07; the first end of the first discharge circuit 300 is connected to the first end of the first pulse-controlled periodic charging circuit 100. The second terminal of the first discharge circuit 300 and the second terminal of the first pulse-controlled periodic charging circuit 100 are commonly grounded;

第二放电电路400用于泄放由第二电容08放电形成的第二电流；所述第二放电电路400的第一端与第二脉冲控制的周期充电电路200的第一端相连，所述第二放电电路400的第二端与第二脉冲控制的周期充电电路200的第二端共同接地。The second discharge circuit 400 is used to discharge the second current formed by the discharge of the second capacitor 08; the first end of the second discharge circuit 400 is connected to the first end of the second pulse-controlled periodic charging circuit 200. The second terminal of the second discharging circuit 400 and the second terminal of the second pulse-controlled periodic charging circuit 200 are commonly grounded.

作为优选方式，所述第一脉冲控制的周期充电电路100包括第一直流电压源01、第一脉冲电压源03、第一压控开关12、第一充电电阻05及第一电容07；第一直流电压源01的第一端与第一压控开关12的第一端相连，第一压控开关12的第二端与第一充电电阻05的第一端相连，第一充电电阻05的第二端与第一电容07的第一端相连，第一脉冲电压源03的第一端与第一压控开关12的第三端相连，第一直流电压源01的第二端、第一电容07的第二端、第一脉冲电压源03的第二端、第一压控开关12的第四端共同接地。As a preferred way, the first pulse-controlled periodic charging circuit 100 includes a first DC voltage source 01, a first pulse voltage source 03, a first voltage-controlled switch 12, a first charging resistor 05 and a first capacitor 07; The first terminal of the DC voltage source 01 is connected to the first terminal of the first voltage-controlled switch 12, the second terminal of the first voltage-controlled switch 12 is connected to the first terminal of the first charging resistor 05, and the first terminal of the first charging resistor 05 is connected to the first terminal of the first voltage-controlled switch 12. The two terminals are connected to the first terminal of the first capacitor 07 , the first terminal of the first pulse voltage source 03 is connected to the third terminal of the first voltage-controlled switch 12 , the second terminal of the first DC voltage source 01 and the first capacitor The second terminal of 07, the second terminal of the first pulse voltage source 03, and the fourth terminal of the first voltage-controlled switch 12 are commonly grounded.

作为优选方式，所述第二脉冲控制的周期充电电路200包括第二直流电压源02、第二脉冲电压源04、第二压控开关13、第二充电电阻06及第二电容08；第二直流电压源02的第一端与第二压控开关13的第一端相连，第二压控开关13的第二端与第二充电电阻06的第一端相连，第二充电电阻06的第二端与第二电容08的第一端相连，第二脉冲电压源04的第一端与第二压控开关13的第三端相连，第二直流电压源02的第二端、第二电容08的第二端、第二脉冲电压源04的第二端、第二压控开关13的第四端共同接地。As a preferred way, the second pulse-controlled periodic charging circuit 200 includes a second DC voltage source 02, a second pulse voltage source 04, a second voltage-controlled switch 13, a second charging resistor 06 and a second capacitor 08; The first terminal of the DC voltage source 02 is connected to the first terminal of the second voltage-controlled switch 13, the second terminal of the second voltage-controlled switch 13 is connected to the first terminal of the second charging resistor 06, and the second terminal of the second charging resistor 06 is connected to the first terminal of the second voltage-controlled switch 13. The two terminals are connected to the first terminal of the second capacitor 08 , the first terminal of the second pulse voltage source 04 is connected to the third terminal of the second voltage-controlled switch 13 , the second terminal of the second DC voltage source 02 and the second capacitor The second terminal of 08, the second terminal of the second pulse voltage source 04, and the fourth terminal of the second voltage-controlled switch 13 are commonly grounded.

作为优选方式，所述第一放电电路300包括第一电容07、第一分压电阻09及第三分压电阻11；第一分压电阻09的第一端与第一电容07的第一端相连，第一分压电阻09的第二端与第三分压电阻11的第一端相连，第一电容07的第二端、第三分压电阻11的第二端共同接地。As a preferred method, the first discharge circuit 300 includes a first capacitor 07, a first voltage dividing resistor 09 and a third voltage dividing resistor 11; the first end of the first voltage dividing resistor 09 and the first end of the first capacitor 07 are connected, the second end of the first voltage dividing resistor 09 is connected to the first end of the third voltage dividing resistor 11, the second end of the first capacitor 07 and the second end of the third voltage dividing resistor 11 are commonly grounded.

作为优选方式，所述第二放电电路400包括第二电容08、第二分压电阻10及第三分压电阻11；第二分压电阻10的第一端与第二电容08的第一端相连，第二分压电阻10的第二端与第三分压电阻11的第一端相连，第二电容08的第二端、第三分压电阻11的第二端共同接地。As a preferred method, the second discharge circuit 400 includes a second capacitor 08, a second voltage dividing resistor 10 and a third voltage dividing resistor 11; the first end of the second voltage dividing resistor 10 and the first end of the second capacitor 08 are connected, the second end of the second voltage dividing resistor 10 is connected to the first end of the third voltage dividing resistor 11, the second end of the second capacitor 08 and the second end of the third voltage dividing resistor 11 are commonly grounded.

本发明的工作原理如下：The working principle of the present invention is as follows:

第一直流电压源01通过第一充电电阻05对第一电容07充电；第一脉冲电压源03产生的周期性脉冲电压用于控制第一压控开关12的周期性开断，用于形成周期性激励脉冲；The first DC voltage source 01 charges the first capacitor 07 through the first charging resistor 05; the periodic pulse voltage generated by the first pulse voltage source 03 is used to control the periodic opening and closing of the first voltage-controlled switch 12 to form a periodic sexually arousing pulses;

经第一脉冲控制的周期充电电路100充电后的第一电容07在第一脉冲控制的周期充电电路100断开后，通过第一分压电阻09和第三分压电阻11产生第一放电电流；The first capacitor 07 charged by the first pulse-controlled periodic charging circuit 100 generates a first discharge current through the first voltage-dividing resistor 09 and the third voltage-dividing resistor 11 after the first pulse-controlled periodic charging circuit 100 is turned off. ;

第二直流电压源02通过第二充电电阻06对第二电容08充电；第二脉冲电压源04产生的周期性脉冲电压用于控制第二压控开关13的周期性开断，用于形成周期性激励脉冲；The second DC voltage source 02 charges the second capacitor 08 through the second charging resistor 06; the periodic pulse voltage generated by the second pulse voltage source 04 is used to control the periodic opening and closing of the second voltage-controlled switch 13 to form a periodic sexually arousing pulses;

经第二脉冲控制的周期充电电路200充电后的第二电容08在第二脉冲控制的周期充电电路200断开后，通过第二分压电阻10和第三分压电阻11产生第二放电电流；The second capacitor 08 charged by the second pulse-controlled periodic charging circuit 200 generates a second discharge current through the second voltage-dividing resistor 10 and the third voltage-dividing resistor 11 after the second pulse-controlled periodic charging circuit 200 is turned off. ;

第一放电电流和第二放电电流共同流过第三分压电阻11，在第三分压电阻11的第一端产生了符合《ISO7637》所描述的测试激励波形。The first discharge current and the second discharge current flow together through the third voltage dividing resistor 11, and a test excitation waveform in line with the description of "ISO7637" is generated at the first end of the third voltage dividing resistor 11.

本发明的有益效果是：用于产生与测试标准高度吻合的激励波形，更加准确的评估汽车电子中电子元器件的稳定性和可靠性。The beneficial effects of the invention are: used to generate excitation waveforms that are highly consistent with test standards, and more accurately evaluate the stability and reliability of electronic components in automotive electronics.

附图说明Description of the drawings

图1为标准的ISO7637定义的脉冲波形示意图；Figure 1 is a schematic diagram of the pulse waveform defined by the standard ISO7637;

图2为本发明提供的脉冲发生电路的结构示意图；Figure 2 is a schematic structural diagram of the pulse generating circuit provided by the present invention;

图3为本发明提供的脉冲发生电路的示意图；Figure 3 is a schematic diagram of the pulse generating circuit provided by the present invention;

图4为本发明提供的脉冲发生电路模型嵌入SPICE模拟器中模拟瞬态事件发生时产生的电压激励波形。Figure 4 shows the voltage excitation waveform generated when the pulse generation circuit model provided by the present invention is embedded in a SPICE simulator to simulate the occurrence of a transient event.

UA为供电电压，Us为脉冲峰值电压，tr为电压从0.1Us上升到0.9Us的上升时间，td为电压从0.1Us上升到电压峰值后再下降到0.1Us的脉冲宽度，t1为两个脉冲之间的时间间隔，t2为UA消失到下一次UA恢复的时间，t3为UA消失到脉冲产生的最小时间；U A is the supply voltage, U s is the pulse peak voltage, t r is the rising time for the voltage to rise from 0.1U s to 0.9U s , and t d is the time for the voltage to rise from 0.1U s to the voltage peak and then drop to 0.1U s . Pulse width, t 1 is the time interval between two pulses, t 2 is the time from U A disappearing to the next U A recovery, t 3 is the minimum time from U A disappearing to pulse generation;

01为第一直流电压源，02为第二直流电压源，03为第一脉冲电压源，04为第二脉冲电压源，05为第一充电电阻，06为第二充电电阻，07为第一电容，08为第二电容，09为第一分压电阻，10为第二分压电阻，11为第三分压电阻，12为第一压控开关，13为第二压控开关；100为第一脉冲控制的周期充电电路，200为第二脉冲控制的周期充电电路，300为第一放电电路，400为第二放电电路。01 is the first DC voltage source, 02 is the second DC voltage source, 03 is the first pulse voltage source, 04 is the second pulse voltage source, 05 is the first charging resistor, 06 is the second charging resistor, 07 is the first Capacitor, 08 is the second capacitor, 09 is the first voltage dividing resistor, 10 is the second voltage dividing resistor, 11 is the third voltage dividing resistor, 12 is the first voltage controlled switch, 13 is the second voltage controlled switch; 100 is The first pulse-controlled periodic charging circuit, 200 is the second pulse-controlled periodic charging circuit, 300 is the first discharging circuit, and 400 is the second discharging circuit.

具体实施方式Detailed ways

以下通过特定的具体实例说明本发明的实施方式，本领域技术人员可由本说明书所揭露的内容轻易地了解本发明的其他优点与功效。本发明还可以通过另外不同的具体实施方式加以实施或应用，本说明书中的各项细节也可以基于不同观点与应用，在没有背离本发明的精神下进行各种修饰或改变。The following describes the embodiments of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

如图3所示，本实施例提供一种用于车规级瞬态抗扰能力测试的信号发生电路，包括：As shown in Figure 3, this embodiment provides a signal generation circuit for vehicle-level transient immunity testing, including:

第一脉冲控制的周期充电电路100、第二脉冲控制的周期充电电路200、第一放电电路300及第二放电电路400；其中，第一脉冲控制的周期充电电路100、第二脉冲控制的周期充电电路200、第一放电电路300及第二放电电路400各自并联；The first pulse-controlled periodic charging circuit 100, the second pulse-controlled periodic charging circuit 200, the first discharge circuit 300 and the second discharging circuit 400; wherein, the first pulse-controlled periodic charging circuit 100, the second pulse-controlled periodic charging circuit The charging circuit 200, the first discharging circuit 300 and the second discharging circuit 400 are each connected in parallel;

所述第一脉冲控制的周期充电电路100用于对第一电容07进行周期性充电，使第一电容07两端的电压达到预设的电压等级，并通过第一放电电路300周期性放电，产生第一放电电流；第一脉冲控制的周期充电电路100的第一端与第一放电电路300的第一端相连，所述第一脉冲控制的周期充电电路100的第二端与第一放电电路300的第二端共同接地；The first pulse-controlled periodic charging circuit 100 is used to periodically charge the first capacitor 07 so that the voltage across the first capacitor 07 reaches a preset voltage level, and is periodically discharged through the first discharge circuit 300 to generate The first discharge current; the first end of the first pulse-controlled periodic charging circuit 100 is connected to the first end of the first discharging circuit 300, and the second end of the first pulse-controlled periodic charging circuit 100 is connected to the first discharging circuit. The second terminal of 300 is commonly grounded;

所述第二脉冲控制的周期充电电路200用于对第二电容08进行周期性充电，使第二电容08两端的电压达到预设的电压等级，并通过第二放电电路400周期性放电，产生第二放电电流；第二脉冲控制的周期充电电路200第一端与第二放电电路400的第一端相连，所述第二脉冲控制的周期充电电路200的第二端与第二放电电路400的第二端共同接地；The second pulse-controlled periodic charging circuit 200 is used to periodically charge the second capacitor 08 so that the voltage across the second capacitor 08 reaches a preset voltage level, and is periodically discharged through the second discharge circuit 400 to generate The second discharge current; the first terminal of the second pulse-controlled periodic charging circuit 200 is connected to the first terminal of the second discharging circuit 400, and the second terminal of the second pulse-controlled periodic charging circuit 200 is connected to the second discharging circuit 400. The second end is commonly grounded;

第一放电电路300用于泄放由第一电容07放电形成的第一电流；所述第一放电电路300的第一端与第一脉冲控制的周期充电电路100的第一端相连，所述第一放电电路300的第二端与第一脉冲控制的周期充电电路100的第二端共同接地；The first discharge circuit 300 is used to discharge the first current formed by the discharge of the first capacitor 07; the first end of the first discharge circuit 300 is connected to the first end of the first pulse-controlled periodic charging circuit 100. The second terminal of the first discharge circuit 300 and the second terminal of the first pulse-controlled periodic charging circuit 100 are commonly grounded;

第二放电电路400用于泄放由第二电容08放电形成的第二电流；所述第二放电电路400的第一端与第二脉冲控制的周期充电电路200的第一端相连，所述第二放电电路400的第二端与第二脉冲控制的周期充电电路200的第二端共同接地。The second discharge circuit 400 is used to discharge the second current formed by the discharge of the second capacitor 08; the first end of the second discharge circuit 400 is connected to the first end of the second pulse-controlled periodic charging circuit 200. The second terminal of the second discharging circuit 400 and the second terminal of the second pulse-controlled periodic charging circuit 200 are commonly grounded.

所述第一脉冲控制的周期充电电路100包括第一直流电压源01、第一脉冲电压源03、第一压控开关12、第一充电电阻05及第一电容07；第一直流电压源01的第一端与第一压控开关12的第一端相连，第一压控开关12的第二端与第一充电电阻05的第一端相连，第一充电电阻05的第二端与第一电容07的第一端相连，第一脉冲电压源03的第一端与第一压控开关12的第三端相连，第一直流电压源01的第二端、第一电容07的第二端、第一脉冲电压源03的第二端、第一压控开关12的第四端共同接地。The first pulse-controlled periodic charging circuit 100 includes a first DC voltage source 01, a first pulse voltage source 03, a first voltage-controlled switch 12, a first charging resistor 05 and a first capacitor 07; the first DC voltage source 01 The first end of the first voltage-controlled switch 12 is connected to the first end of the first voltage-controlled switch 12. The second end of the first voltage-controlled switch 12 is connected to the first end of the first charging resistor 05. The second end of the first charging resistor 05 is connected to the first end of the first voltage-controlled switch 12. The first terminal of a capacitor 07 is connected, the first terminal of the first pulse voltage source 03 is connected to the third terminal of the first voltage-controlled switch 12, the second terminal of the first DC voltage source 01 and the second terminal of the first capacitor 07 are connected. terminal, the second terminal of the first pulse voltage source 03, and the fourth terminal of the first voltage-controlled switch 12 are commonly grounded.

所述第二脉冲控制的周期充电电路200包括第二直流电压源02、第二脉冲电压源04、第二压控开关13、第二充电电阻06及第二电容08；第二直流电压源02的第一端与第二压控开关13的第一端相连，第二压控开关13的第二端与第二充电电阻06的第一端相连，第二充电电阻06的第二端与第二电容08的第一端相连，第二脉冲电压源04的第一端与第二压控开关13的第三端相连，第二直流电压源02的第二端、第二电容08的第二端、第二脉冲电压源04的第二端、第二压控开关13的第四端共同接地。The second pulse-controlled periodic charging circuit 200 includes a second DC voltage source 02, a second pulse voltage source 04, a second voltage-controlled switch 13, a second charging resistor 06 and a second capacitor 08; the second DC voltage source 02 The first end of the second voltage-controlled switch 13 is connected to the first end of the second voltage-controlled switch 13. The second end of the second voltage-controlled switch 13 is connected to the first end of the second charging resistor 06. The second end of the second charging resistor 06 is connected to the first end of the second voltage-controlled switch 13. The first terminals of the two capacitors 08 are connected to each other, the first terminal of the second pulse voltage source 04 is connected to the third terminal of the second voltage-controlled switch 13 , the second terminal of the second DC voltage source 02 and the second terminal of the second capacitor 08 are connected to each other. terminal, the second terminal of the second pulse voltage source 04, and the fourth terminal of the second voltage-controlled switch 13 are commonly grounded.

所述第一放电电路300包括第一电容07、第一分压电阻09及第三分压电阻11；第一分压电阻09的第一端与第一电容07的第一端相连，第一分压电阻09的第二端与第三分压电阻11的第一端相连，第一电容07的第二端、第三分压电阻11的第二端共同接地。The first discharge circuit 300 includes a first capacitor 07, a first voltage dividing resistor 09 and a third voltage dividing resistor 11; the first end of the first voltage dividing resistor 09 is connected to the first end of the first capacitor 07, and the first The second end of the voltage dividing resistor 09 is connected to the first end of the third voltage dividing resistor 11 , and the second end of the first capacitor 07 and the second end of the third voltage dividing resistor 11 are commonly grounded.

所述第二放电电路400包括第二电容08、第二分压电阻10及第三分压电阻11；第二分压电阻10的第一端与第二电容08的第一端相连，第二分压电阻10的第二端与第三分压电阻11的第一端相连，第二电容08的第二端、第三分压电阻11的第二端共同接地。The second discharge circuit 400 includes a second capacitor 08, a second voltage dividing resistor 10 and a third voltage dividing resistor 11; the first end of the second voltage dividing resistor 10 is connected to the first end of the second capacitor 08, and the second The second end of the voltage dividing resistor 10 is connected to the first end of the third voltage dividing resistor 11 , and the second end of the second capacitor 08 and the second end of the third voltage dividing resistor 11 are commonly grounded.

本实施例的工作原理如下：The working principle of this embodiment is as follows:

第一直流电压源01通过第一充电电阻05对第一电容07充电；第一脉冲电压源03产生的周期性脉冲电压用于控制第一压控开关12的周期性开断，用于形成周期性脉冲。The first DC voltage source 01 charges the first capacitor 07 through the first charging resistor 05; the periodic pulse voltage generated by the first pulse voltage source 03 is used to control the periodic opening and closing of the first voltage-controlled switch 12 to form a periodic Sex pulse.

经第一脉冲控制的周期充电电路100充电后的第一电容07在第一脉冲控制的周期充电电路100断开后，通过第一分压电阻09和第三分压电阻11产生第一放电电流。The first capacitor 07 charged by the first pulse-controlled periodic charging circuit 100 generates a first discharge current through the first voltage-dividing resistor 09 and the third voltage-dividing resistor 11 after the first pulse-controlled periodic charging circuit 100 is turned off. .

第二直流电压源02通过第二充电电阻06对第二电容08充电；第二脉冲电压源04产生的周期性脉冲电压用于控制第二压控开关13的周期性开断，用于形成周期性脉冲。The second DC voltage source 02 charges the second capacitor 08 through the second charging resistor 06; the periodic pulse voltage generated by the second pulse voltage source 04 is used to control the periodic opening and closing of the second voltage-controlled switch 13 to form a periodic Sex pulse.

经第二脉冲控制的周期充电电路200充电后的第二电容08在第二脉冲控制的周期充电电路200断开后，通过第二分压电阻10和第三分压电阻11产生第二放电电流。The second capacitor 08 charged by the second pulse-controlled periodic charging circuit 200 generates a second discharge current through the second voltage-dividing resistor 10 and the third voltage-dividing resistor 11 after the second pulse-controlled periodic charging circuit 200 is turned off. .

由上述可知，第一放电电流和第二放电电流共同流过第三分压电阻11，在第三分压电阻11的第一端产生了符合《ISO7637》所描述的测试激励波形。如图4所示，为该电路产生的波形。对比图1中的ISO7637-波形1的标准，其主体是Y负半轴区域的周期性脉冲部分，本发明的工作就是仿真产该脉冲波形，可以看出经过波形的叠加，本发明电路产生的波形与标准波形符合得很好。It can be seen from the above that the first discharge current and the second discharge current flow through the third voltage dividing resistor 11 together, and a test excitation waveform in line with the description of "ISO7637" is generated at the first end of the third voltage dividing resistor 11. As shown in Figure 4, the waveform generated by this circuit is shown. Comparing the ISO7637-waveform 1 standard in Figure 1, its main body is the periodic pulse part in the Y negative half-axis area. The work of the present invention is to simulate the pulse waveform. It can be seen that after the superposition of the waveforms, the circuit of the present invention generates The waveforms match the standard waveforms very well.

上述实施例仅例示性说明本发明的原理及其功效，而非用于限制本发明。任何熟悉此技术的人士皆可在不违背本发明的精神及范畴下，对上述实施例进行修饰或改变。因此，凡所属技术领域中具有通常知识者在未脱离本发明所揭示的精神与技术思想下所完成的一切等效修饰或改变，仍应由本发明的权利要求所涵盖。The above embodiments only illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims (5)

1. A signal generating circuit for vehicle-level transient immunity testing, comprising: a first pulse-controlled periodic charging circuit (100), a second pulse-controlled periodic charging circuit (200), a first discharging circuit (300), and a second discharging circuit (400); wherein the first pulse-controlled periodic charging circuit (100), the second pulse-controlled periodic charging circuit (200), the first discharging circuit (300) and the second discharging circuit (400) are respectively connected in parallel;
the first pulse-controlled periodic charging circuit (100) is used for periodically charging the first capacitor (07) to enable the voltage at two ends of the first capacitor (07) to reach a preset voltage level, and periodically discharging through the first discharging circuit (300) to generate a first discharging current; the first end of the first pulse-controlled periodic charging circuit (100) is connected with the first end of the first discharging circuit (300), and the second end of the first pulse-controlled periodic charging circuit (100) is commonly grounded with the second end of the first discharging circuit (300);
the second pulse-controlled periodic charging circuit (200) is used for periodically charging the second capacitor (08) to enable the voltage at two ends of the second capacitor (08) to reach a preset voltage level, and periodically discharging through the second discharging circuit (400) to generate a second discharging current; the first end of the second pulse-controlled periodic charging circuit (200) is connected with the first end of the second discharging circuit (400), and the second end of the second pulse-controlled periodic charging circuit (200) is commonly grounded with the second end of the second discharging circuit (400);
the first discharging circuit (300) is used for discharging a first current formed by discharging the first capacitor (07); the first end of the first discharging circuit (300) is connected with the first end of the first pulse-controlled periodic charging circuit (100), and the second end of the first discharging circuit (300) is commonly grounded with the second end of the first pulse-controlled periodic charging circuit (100);
the second discharging circuit (400) is used for discharging a second current formed by discharging the second capacitor (08); the first end of the second discharging circuit (400) is connected with the first end of the second pulse-controlled periodic charging circuit (200), and the second end of the second discharging circuit (400) is grounded with the second pulse-controlled periodic charging circuit (200).
2. A signal generating circuit for vehicle-specific transient immunity testing as recited in claim 1, wherein: the first pulse-controlled periodic charging circuit (100) comprises a first direct-current voltage source (01), a first pulse voltage source (03), a first voltage-controlled switch (12), a first charging resistor (05) and a first capacitor (07); the first end of a first direct current voltage source (01) is connected with the first end of a first voltage-controlled switch (12), the second end of the first voltage-controlled switch (12) is connected with the first end of a first charging resistor (05), the second end of the first charging resistor (05) is connected with the first end of a first capacitor (07), the first end of a first pulse voltage source (03) is connected with the third end of the first voltage-controlled switch (12), and the second end of the first direct current voltage source (01), the second end of the first capacitor (07), the second end of the first pulse voltage source (03) and the fourth end of the first voltage-controlled switch (12) are grounded together.
3. A signal generating circuit for vehicle-specific transient immunity testing as recited in claim 1, wherein: the second pulse-controlled periodic charging circuit (200) comprises a second direct-current voltage source (02), a second pulse voltage source (04), a second voltage-controlled switch (13), a second charging resistor (06) and a second capacitor (08); the first end of the second direct current voltage source (02) is connected with the first end of the second voltage-controlled switch (13), the second end of the second voltage-controlled switch (13) is connected with the first end of the second charging resistor (06), the second end of the second charging resistor (06) is connected with the first end of the second capacitor (08), the first end of the second pulse voltage source (04) is connected with the third end of the second voltage-controlled switch (13), and the second end of the second direct current voltage source (02), the second end of the second capacitor (08), the second end of the second pulse voltage source (04) and the fourth end of the second voltage-controlled switch (13) are commonly grounded.
4. A signal generating circuit for vehicle-specific transient immunity testing as recited in claim 1, wherein: the first discharging circuit (300) comprises a first capacitor (07), a first voltage dividing resistor (09) and a third voltage dividing resistor (11); the first end of the first voltage dividing resistor (09) is connected with the first end of the first capacitor (07), the second end of the first voltage dividing resistor (09) is connected with the first end of the third voltage dividing resistor (11), and the second end of the first capacitor (07) and the second end of the third voltage dividing resistor (11) are grounded together.
5. A signal generating circuit for vehicle-specific transient immunity testing as recited in claim 1, wherein: the second discharging circuit (400) comprises a second capacitor (08), a second voltage dividing resistor (10) and a third voltage dividing resistor (11); the first end of the second voltage dividing resistor (10) is connected with the first end of the second capacitor (08), the second end of the second voltage dividing resistor (10) is connected with the first end of the third voltage dividing resistor (11), and the second end of the second capacitor (08) and the second end of the third voltage dividing resistor (11) are grounded together.
CN202311123556.5A 2023-09-01 2023-09-01 Signal generation circuit for testing vehicle-standard-level transient immunity Pending CN117269642A (en)

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