Positive pulse instruction signal generation circuit of ground detection equipment and ground detection equipment

Abstract

The invention provides a positive pulse instruction signal generation circuit of ground detection equipment and the ground detection equipment. The circuit comprises a digital isolation module, a driving and output current monitoring module, a high-side switch and a power supply module, a processor in the ground detection equipment is connected with the input end of the digital isolation module; the output end of the digital isolation module is connected with the first input end of the driving and output current monitoring module; the output end of the driving and output current monitoring module is connected with the first input end of the high-side switch; the first output end of the high-side switch is connected with the second input end of the driving and output current monitoring module; the second output end of the high-side switch is connected with a tested object; the output end of the power supply module is connected with the second input end of the high-side switch. According to the application, the tested object and the positive pulse instruction signal generation circuit can be isolated, and the phenomenon that the tested object cannot operate normally and even is damaged due to the fact that the positive pulse instruction signal generation circuit is abnormal is avoided.

Description

Technical Field

[0001] The present invention relates to the field of ground detection equipment, and in particular to a positive pulse command signal generating circuit of ground detection equipment and ground detection equipment. Background Art

[0002] Ground detection equipment refers to equipment that detects various objects in the ground environment. Positive pulse command signal refers to an electrical signal used to control or trigger specific operations in the object being tested (such as the integrated electronic equipment of a satellite).

[0003] When a traditional positive pulse command signal generating circuit is used for detection, the object under test is not isolated from the positive pulse command signal generating circuit. When the positive pulse command signal generating circuit is abnormal, the object under test cannot operate normally or may even be damaged. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide a positive pulse command signal generating circuit and a ground detection device, which can isolate the object under test and the positive pulse command signal generating circuit, so as to avoid the phenomenon that the object under test cannot operate normally or even is damaged due to abnormalities in the positive pulse command signal generating circuit.

[0005] In the first aspect, an embodiment of the present application provides a positive pulse command signal generating circuit of a ground detection device, the circuit comprising a digital isolation module, a drive and output current monitoring module, a high-side switch and a power supply module; the processor in the ground detection device is connected to the input end of the digital isolation module; the output end of the digital isolation module is connected to the first input end of the drive and output current monitoring module; the output end of the drive and output current monitoring module is connected to the first input end of the high-side switch; the first output end of the high-side switch is connected to the second input end of the drive and output current monitoring module; the second output end of the high-side switch is connected to the object to be measured; the output end of the power supply module is connected to the second input end of the high-side switch;

[0006] The digital isolation module is used to isolate and transmit the digital pulse signal sent by the processor to the drive and output current monitoring module; and send the isolated digital pulse signal to the drive and output current monitoring module;

[0007] The driving and output current monitoring module is used to enhance the driving capability of the isolated digital pulse signal and send the enhanced digital pulse signal to the high-side switch when the output current monitoring signal output by the high-side switch meets the preset numerical condition; the output current monitoring signal is a signal output by the output current of the high-side switch after passing through the sampling resistor and operational amplifier inside the high-side switch;

[0008] The high-side switch is used to generate a positive pulse command signal from the enhanced digital pulse signal, and send the positive pulse command signal to the object under test;

[0009] The power supply module is used to supply power to the high-side switch.

[0010] In a possible implementation, the digital isolation module includes a first operational amplifier, a second operational amplifier, a first capacitor, and a second capacitor;

[0011] The processor is connected to the input end of the first operational amplifier; the output end of the first operational amplifier is connected to one end of the first capacitor; the other end of the first capacitor is connected to one end of the second capacitor; the other end of the second capacitor is connected to the input end of the second operational amplifier; the output end of the second operational amplifier is connected to the first input end of the driving and output current monitoring module;

[0012] Among them, the input end of the first operational amplifier is the input end of the digital isolation module; the output end of the second operational amplifier is the output end of the digital isolation module; the first power supply of the first operational amplifier and the second power supply of the second operational amplifier are isolated from each other; the ground signal of the first operational amplifier and the ground signal of the second operational amplifier are isolated from each other; the ground signal of the first operational amplifier is connected to the ground signal of the processor; the ground signal of the second operational amplifier is connected to the ground signal of the drive and output current monitoring module.

[0013] In a possible implementation, the driving and output current monitoring module includes: a buffer driving module, a comparator;

[0014] The output end of the digital isolation module is connected to the first input end of the buffer driving module; the output end of the buffer driving module is connected to the first input end of the high-side switch; the first output end of the high-side switch is connected to the input end of the comparator; the output end of the comparator is connected to the second input end of the buffer driving module;

[0015] Wherein, the first input end of the buffer driving module is the first input end of the driving and output current monitoring module; the input end of the comparator is the second input end of the driving and output current monitoring module; the output end of the buffer driving module is the output end of the driving and output current monitoring module;

[0016] The comparator is used to compare the value corresponding to the output current monitoring signal and the voltage division value of the preset resistor; when the value corresponding to the output current monitoring signal is less than the voltage division value of the preset resistor, the comparator outputs a high level;

[0017] The buffer driving module is used to enhance the driving capability of the isolated digital pulse signal when the comparator outputs a high level, and send the enhanced digital pulse signal to the high-side switch.

[0018] In a possible implementation manner, the buffer driving module includes a third operational amplifier, a fourth operational amplifier and a fifth operational amplifier;

[0019] The output end of the digital isolation module is connected to the input end of the third operational amplifier; the output end of the third operational amplifier is connected to the first input end of the fourth operational amplifier; the output end of the fourth operational amplifier is connected to the first input end of the high-side switch; the output end of the fifth operational amplifier is connected to the second input end of the fourth operational amplifier;

[0020] Wherein, the input end of the third operational amplifier is the first input end of the buffer driving module; and the output end of the fourth operational amplifier is the output end of the buffer driving module.

[0021] In a possible implementation, the comparator includes the preset resistor, the target resistor and a sixth operational amplifier;

[0022] The first output terminal of the high-side switch is connected to the negative input terminal of the sixth operational amplifier; the preset resistor is connected to the positive input terminal of the sixth operational amplifier; the output terminal of the sixth operational amplifier is respectively connected to one end of the target resistor and the second input terminal of the buffer driving module;

[0023] Wherein, the negative input terminal of the sixth operational amplifier is the input terminal of the comparator.

[0024] In a possible implementation, the power module includes: an input power supply, an isolated switching power supply;

[0025] The output end of the input power supply is connected to the input end of the isolated switching power supply, and the output end of the isolated switching power supply is connected to the second input end of the high-side switch;

[0026] The input power source generates a power supply that meets the voltage standard required by the positive pulse command signal through the isolated switching power supply, and supplies power to the high-side switch through the power supply.

[0027] In a second aspect, an embodiment of the present application further provides a ground detection device, the ground detection device comprising a processor, a positive pulse command signal generating circuit of the ground detection device of any one of the first aspects;

[0028] The circuit includes a digital isolation module, a drive and output current monitoring module, a high-side switch and a power supply module; the processor in the ground detection device is connected to the input end of the digital isolation module; the output end of the digital isolation module is connected to the first input end of the drive and output current monitoring module; the output end of the drive and output current monitoring module is connected to the first input end of the high-side switch; the first output end of the high-side switch is connected to the second input end of the drive and output current monitoring module; the second output end of the high-side switch is connected to the object to be measured; the output end of the power supply module is connected to the second input end of the high-side switch;

[0029] The digital isolation module is used to isolate and transmit the digital pulse signal sent by the processor to the drive and output current monitoring module; and send the isolated digital pulse signal to the drive and output current monitoring module;

[0030] The driving and output current monitoring module is used to enhance the driving capability of the isolated digital pulse signal and send the enhanced digital pulse signal to the high-side switch when the output current monitoring signal output by the high-side switch meets the preset numerical condition; the output current monitoring signal is a signal output by the output current of the high-side switch after passing through the sampling resistor and operational amplifier inside the high-side switch;

[0031] The high-side switch is used to generate a positive pulse command signal from the enhanced digital pulse signal, and send the positive pulse command signal to the object under test;

[0032] The power supply module is used to supply power to the high-side switch.

[0033] In a possible implementation, the digital isolation module includes a first operational amplifier, a second operational amplifier, a first capacitor, and a second capacitor;

[0034] The processor is connected to the input end of the first operational amplifier; the output end of the first operational amplifier is connected to one end of the first capacitor; the other end of the first capacitor is connected to one end of the second capacitor; the other end of the second capacitor is connected to the input end of the second operational amplifier; the output end of the second operational amplifier is connected to the first input end of the driving and output current monitoring module;

[0035] Among them, the input end of the first operational amplifier is the input end of the digital isolation module; the output end of the second operational amplifier is the output end of the digital isolation module; the first power supply of the first operational amplifier and the second power supply of the second operational amplifier are isolated from each other; the ground signal of the first operational amplifier and the ground signal of the second operational amplifier are isolated from each other; the ground signal of the first operational amplifier is connected to the ground signal of the processor; the ground signal of the second operational amplifier is connected to the ground signal of the drive and output current monitoring module.

[0036] In a possible implementation, the driving and output current monitoring module includes: a buffer driving module, a comparator;

[0037] The output end of the digital isolation module is connected to the first input end of the buffer driving module; the output end of the buffer driving module is connected to the first input end of the high-side switch; the first output end of the high-side switch is connected to the input end of the comparator; the output end of the comparator is connected to the second input end of the buffer driving module;

[0038] Wherein, the first input end of the buffer driving module is the first input end of the driving and output current monitoring module; the input end of the comparator is the second input end of the driving and output current monitoring module; the output end of the buffer driving module is the output end of the driving and output current monitoring module;

[0039] The comparator is used to compare the value corresponding to the output current monitoring signal and the voltage division value of the preset resistor; when the value corresponding to the output current monitoring signal is less than the voltage division value of the preset resistor, the comparator outputs a high level;

[0040] The buffer driving module is used to enhance the driving capability of the isolated digital pulse signal when the comparator outputs a high level, and send the enhanced digital pulse signal to the high-side switch.

[0041] In a possible implementation manner, the buffer driving module includes a third operational amplifier, a fourth operational amplifier and a fifth operational amplifier;

[0042] The output end of the digital isolation module is connected to the input end of the third operational amplifier; the output end of the third operational amplifier is connected to the first input end of the fourth operational amplifier; the output end of the fourth operational amplifier is connected to the first input end of the high-side switch; the output end of the fifth operational amplifier is connected to the second input end of the fourth operational amplifier;

[0043] Wherein, the input end of the third operational amplifier is the first input end of the buffer driving module; and the output end of the fourth operational amplifier is the output end of the buffer driving module.

[0044] An embodiment of the present application provides a positive pulse command signal generating circuit for a ground detection device and a ground detection device, wherein the circuit includes: a digital isolation module, a driving and output current monitoring module, a high-side switch and a power supply module; the processor in the ground detection device is connected to the input end of the digital isolation module; the output end of the digital isolation module is connected to the first input end of the driving and output current monitoring module; the output end of the driving and output current monitoring module is connected to the first input end of the high-side switch; the first output end of the high-side switch is connected to the second input end of the driving and output current monitoring module; the second output end of the high-side switch is connected to the object to be measured; and the output end of the power supply module is connected to the second input end of the high-side switch. The digital isolation module is used to isolate and transmit the digital pulse signal sent by the processor to the driving and output current monitoring module; and send the isolated digital pulse signal to the driving and output current monitoring module; the driving and output current monitoring module is used to enhance the driving ability of the isolated digital pulse signal when the output current monitoring signal output by the high-side switch meets the preset numerical conditions, and send the enhanced digital pulse signal to the high-side switch; the output current monitoring signal is the signal output by the output current of the high-side switch after passing through the sampling resistor and operational amplifier inside the high-side switch; the high-side switch is used to generate a positive pulse command signal from the enhanced digital pulse signal. Through this application, the object under test and the positive pulse command signal generating circuit can be isolated, avoiding the phenomenon that the object under test cannot operate normally or even is damaged due to abnormalities in the positive pulse command signal generating circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0046] Figure 1 A structural diagram of a positive pulse command signal generating circuit of a ground detection device provided in an embodiment of the present application is shown;

[0047] Figure 2 The structure diagram of the digital isolation module provided by the embodiment of the present application is shown;

[0048] Figure 3 A structural diagram of a positive pulse command signal generating circuit of another ground detection device provided in an embodiment of the present application is shown;

[0049] Figure 4 A structural diagram of a buffer driving module provided in an embodiment of the present application is shown;

[0050] Figure 5 A structural diagram of a comparator provided in an embodiment of the present application is shown;

[0051] Figure 6 A structural diagram of a high-side switch provided in an embodiment of the present application is shown;

[0052] Figure 7 A structural diagram of a positive pulse command signal generating circuit of another ground detection device provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0053] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the drawings in the present application only serve the purpose of explanation and description and are not used to limit the scope of protection of the present application. In addition, it should be understood that the schematic drawings are not drawn in real proportion. The flowchart used in this application shows the operations implemented according to some embodiments of the present application. It should be understood that the operations of the flowchart can be implemented out of sequence, and the steps without logical context can be reversed in order or implemented simultaneously. In addition, those skilled in the art can add one or more other operations to the flowchart under the guidance of the content of the present application, or remove one or more operations from the flowchart.

[0054] In addition, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0055] In order to enable those skilled in the art to use the contents of this application, the following implementation is given in conjunction with a specific application scenario, "ground detection equipment for satellite integrated electronic equipment." For those skilled in the art, the general principles defined herein can be applied to other embodiments and application scenarios without departing from the spirit and scope of this application. Although this application is mainly described around "ground detection equipment for satellite integrated electronic equipment," it should be understood that this is only an exemplary embodiment.

[0056] It should be noted that the term "comprising" will be used in the embodiments of the present application to indicate the existence of the features declared thereafter, but does not exclude the addition of other features.

[0057] The traditional positive pulse command signal generation circuit includes a high-side switch, an input power supply, and a non-isolated switching power supply. The processor sends a digital pulse signal; the high-side switch generates a positive pulse command signal from the digital pulse signal and sends the positive pulse command signal to the object under test; the input power of the ground detection equipment is first converted by a non-isolated switching power supply, and then a positive pulse power supply with a high-level voltage standard required for the positive pulse command signal is generated to power the high-side switch.

[0058] However, the processor, high-side switch and input power supply in the traditional positive pulse command signal generating circuit are not isolated from the object under test. When testing the object under test, the ground signal of the object under test is connected to the ground signal of the ground monitoring equipment, resulting in the following risks to the object under test: (1) When the input power is abnormal, the metal casing of the object under test may be energized, especially in a humid or conductive environment, which increases the risk of electric shock. (2) When the processor or the positive pulse command signal generating circuit is short-circuited or overloaded, it will cause damage to the object under test. (3) The input power is 220V AC power, and the object under test is easily affected by the electromagnetic interference in the AC power, which will affect the normal operation of the object under test and the accuracy of the test data during testing. (4) Fluctuations in the AC voltage will directly affect the performance of the object under test, causing unstable operation or damage to the object under test.

[0059] In view of this, the present invention provides a positive pulse command signal generating circuit of a ground detection device, which includes a digital isolation module, a driving and output current monitoring module, a high-side switch and a power supply module; the processor in the ground detection device is connected to the input end of the digital isolation module; the output end of the digital isolation module is connected to the first input end of the driving and output current monitoring module; the output end of the driving and output current monitoring module is connected to the first input end of the high-side switch; the first output end of the high-side switch is connected to the second input end of the driving and output current monitoring module; the second output end of the high-side switch is connected to the object to be measured; the output end of the power supply module is connected to the second input end of the high-side switch; the digital isolation module is used to connect the processor The digital pulse signal sent is isolated and transmitted to the drive and output current monitoring module; and the isolated digital pulse signal is sent to the drive and output current monitoring module; the drive and output current monitoring module is used to enhance the driving ability of the isolated digital pulse signal when the output current monitoring signal output by the high-side switch meets the preset numerical conditions, and send the enhanced digital pulse signal to the high-side switch; the output current monitoring signal is the signal output by the output current of the high-side switch after passing through the sampling resistor and operational amplifier inside the high-side switch; the high-side switch is used to generate a positive pulse command signal from the enhanced digital pulse signal, and send the positive pulse command signal to the object under test; the power supply module is used to power the high-side switch. This circuit can isolate the object under test from the processor, high-side switch and input power supply in the positive pulse command signal generation circuit, avoid damage to the object under test or unstable operation, and improve the safety of the electronic device under test and the test accuracy.

[0060] The following is a detailed description of a positive pulse command signal generating circuit for a ground detection device provided in an embodiment of the present application.

[0061] Reference Figure 1 As shown, it is a structural diagram of a positive pulse command signal generating circuit of a ground detection device provided in an embodiment of the present application, and the circuit includes a digital isolation module 101, a drive and output current monitoring module 102, a high-side switch 103 and a power supply module 104; the processor in the ground detection device is connected to the input end of the digital isolation module 101; the output end of the digital isolation module 101 is connected to the first input end of the drive and output current monitoring module 102; the output end of the drive and output current monitoring module 102 is connected to the first input end of the high-side switch 103; the first output end of the high-side switch 103 is connected to the second input end of the drive and output current monitoring module 102; the second output end of the high-side switch 103 is connected to the object to be measured; the output end of the power supply module 104 is connected to the second input end of the high-side switch 103.

[0062] The digital isolation module 101 is used to isolate and transmit the digital pulse signal sent by the processor to the driving and output current monitoring module 102 ; and send the isolated digital pulse signal to the driving and output current monitoring module 102 .

[0063] In the implementation manner of the present application, the digital isolation module can isolate the processor from the object under test to prevent damage to the object under test due to processor failure. The chip of the digital isolation module can adopt ISO6760.

[0064] Specifically, refer to Figure 2 As shown, it is a structural diagram of the digital isolation module provided in an embodiment of the present application, the digital isolation module 101 includes a first operational amplifier 1011, a second operational amplifier 1012, a first capacitor 1013 and a second capacitor 1014; the processor is connected to the input end of the first operational amplifier 1011; the output end of the first operational amplifier 1011 is connected to one end of the first capacitor 1013; the other end of the first capacitor 1013 is connected to one end of the second capacitor 1014; the other end of the second capacitor 1014 is connected to the input end of the second operational amplifier 1012; the output end of the second operational amplifier 1012 is connected to the first input end of the drive and output current monitoring module 102.

[0065] Among them, the input end of the first operational amplifier 1011 is the input end of the digital isolation module 101; the output end of the second operational amplifier 1012 is the output end of the digital isolation module 101; the first power supply of the first operational amplifier 1011 and the second power supply of the second operational amplifier 1012 are isolated from each other to ensure that the processor and the object under test are isolated; the ground signal of the first operational amplifier 1011 and the ground signal of the second operational amplifier are isolated from each other to ensure that the processor and the object under test are isolated; the ground signal of the first operational amplifier is connected to the ground signal of the processor; the ground signal of the second operational amplifier is connected to the ground signal of the drive and output current monitoring module.

[0066] The driving and output current monitoring module 102 is used to enhance the driving capability of the isolated digital pulse signal and send the enhanced digital pulse signal to the high-side switch 103 when the output current monitoring signal output by the high-side switch 103 meets the preset numerical conditions; the output current monitoring signal is the signal output by the output current of the high-side switch 103 after passing through the sampling resistor and operational amplifier inside the high-side switch 103.

[0067] In the embodiment of the present application, the driving and output current monitoring module is used to isolate the high-side switch 103 from the object under test to avoid failure of the object under test due to excessive output current of the high-side switch 103 .

[0068] Specifically, refer to Figure 3As shown, it is a structural diagram of a positive pulse command signal generating circuit of another ground detection device provided in an embodiment of the present application. The driving and output current monitoring module 102 includes: a buffer driving module 1021 and a comparator 1022.

[0069] The output end of the digital isolation module 101 is connected to the first input end of the buffer driving module 1021; the output end of the buffer driving module is connected to the first input end of the high-side switch 103; the first output end of the high-side switch 103 is connected to the input end of the comparator 1022; the output end of the comparator is connected to the second input end of the buffer driving module 1021.

[0070] The first input terminal of the buffer driving module 1021 is the first input terminal of the driving and output current monitoring module 102; the input terminal of the comparator 1022 is the second input terminal of the driving and output current monitoring module 102; the output terminal of the buffer driving module 1021 is the output terminal of the driving and output current monitoring module 102;

[0071] In an embodiment of the present application, the comparator 1022 is used to compare the corresponding value of the output current monitoring signal and the voltage division value of the preset resistor; output a high level when the corresponding value of the output current monitoring signal is less than the voltage division value of the preset resistor; the buffer drive module 1021 is used to enhance the driving capability of the isolated digital pulse signal when the comparator 1022 module outputs a high level, and send the enhanced digital pulse signal to the high-side switch 103.

[0072] Further, refer to Figure 4 As shown, it is a structural diagram of the buffer driving module provided in an embodiment of the present application, the buffer driving module 1021 includes a third operational amplifier 10211, a fourth operational amplifier 10212 and a fifth operational amplifier 10213; the output end of the digital isolation module 101 is connected to the input end of the third operational amplifier 10211; the output end of the third operational amplifier 10211 is connected to the first input end of the fourth operational amplifier 10212; the output end of the fourth operational amplifier 10212 is connected to the first input end of the high-side switch 103; the output end of the fifth operational amplifier 10213 is connected to the second input end of the fourth operational amplifier 10212; wherein, the input end of the third operational amplifier 10211 is the first input end of the buffer driving module 1021; the output end of the fourth operational amplifier 10212 is the output end of the buffer driving module 1021.

[0073] Here, the third operational amplifier 10211 receives the enable signal OE output by the comparator 1022, and when the enable signal OE is at a high level, the driving capability of the isolated digital pulse signal is enhanced, and the enhanced digital pulse signal is sent to the high-side switch 103. When the enable signal OE is at a low level, the output end of the fourth operational amplifier 10212 (i.e., the output end of the buffer driving module 1021) is in a high impedance state.

[0074] The buffer driver module 1021 may use a chip of the SN74AHC1G126 model.

[0075] Further, refer to Figure 5 As shown, it is a structural diagram of a comparator provided in an embodiment of the present application, wherein the comparator 1022 includes a preset resistor, a target resistor 10221 and a sixth operational amplifier 10222; the first output terminal of the high-side switch 103 is connected to the negative input terminal of the sixth operational amplifier 10222; the preset resistor is connected to the positive input terminal of the sixth operational amplifier 10222; the output terminal of the sixth operational amplifier 10222 is respectively connected to one end of the target resistor 10221 and the second input terminal of the buffer driving module 1021 (i.e., the input terminal of the fifth operational amplifier 10213). Among them, the negative input terminal of the sixth operational amplifier 10222 is the input terminal of the comparator 1022.

[0076] Here, when the numerical value corresponding to the output current monitoring signal is greater than the voltage divider value of the preset resistor (i.e., the input value of the positive input terminal of the sixth operational amplifier 10222 is greater than the input value of the negative input terminal of the sixth operational amplifier 10222), the comparator 1022 outputs a low-level enable signal; when the numerical value corresponding to the output current monitoring signal is less than the voltage divider value of the preset resistor (i.e., the input value of the positive input terminal of the sixth operational amplifier 10222 is less than the input value of the negative input terminal of the sixth operational amplifier 10222), the comparator 1022 outputs a high-level enable signal.

[0077] The comparator 1022 may be a chip of the LMV7239 type.

[0078] The high-side switch 103 is used to generate a positive pulse command signal from the enhanced digital pulse signal and send the positive pulse command signal to the object under test. Figure 6 The high-side switch 103 outputs the output current monitoring signal to the comparator 1022 through the first output terminal, and sends the positive pulse command signal to the object under test through the second output terminal.

[0079] The high-side switch 103 may use a chip of the VND5050A model. The operating voltage of the high-side switch 103 is 4.5V-36V. The voltage levels of the first output terminal and the second output terminal are consistent with the operating voltage; the first input terminal is compatible with the CMOS logic level, when the logic level is 1, the second output terminal is connected to the second input terminal; when the logic level is 0, the second output terminal is disconnected from the second input terminal.

[0080] The power module 104 is used to supply power to the high-side switch.

[0081] Reference Figure 7 As shown, it is a structural diagram of a positive pulse command signal generating circuit of another ground detection device provided in an embodiment of the present application, wherein the power supply module 104 includes: an input power supply 1041 and an isolated switching power supply 1042; the output end of the input power supply 1041 is connected to the input end of the isolated switching power supply 1042, and the output end of the isolated switching power supply 1042 is connected to the second input end of the high-side switch 103.

[0082] In the implementation manner of the present application, the input power supply 1041 generates a power supply that meets the voltage standard required by the positive pulse command signal through the isolated switching power supply 1042, and powers the high-side switch through the power supply.

[0083] Here, the input power supply is a 220 V mains power supply. The isolated switching power supply 1042 can isolate the input power supply from the object under test to prevent the mains power from affecting the object under test.

[0084] An embodiment of the present application provides a positive pulse command signal generating circuit for a ground detection device, the circuit comprising: a digital isolation module, a drive and output current monitoring module, a high-side switch and a power supply module; the processor in the ground detection device is connected to the input end of the digital isolation module; the output end of the digital isolation module is connected to the first input end of the drive and output current monitoring module; the output end of the drive and output current monitoring module is connected to the first input end of the high-side switch; the first output end of the high-side switch is connected to the second input end of the drive and output current monitoring module; the second output end of the high-side switch is connected to the object to be measured; the output end of the power supply module is connected to the second input end of the high-side switch. The digital isolation module is used to isolate and transmit the digital pulse signal sent by the processor to the driving and output current monitoring module; and send the isolated digital pulse signal to the driving and output current monitoring module; the driving and output current monitoring module is used to enhance the driving ability of the isolated digital pulse signal when the output current monitoring signal output by the high-side switch meets the preset numerical conditions, and send the enhanced digital pulse signal to the high-side switch; the output current monitoring signal is the signal output by the output current of the high-side switch after passing through the sampling resistor and operational amplifier inside the high-side switch; the high-side switch is used to generate a positive pulse command signal from the enhanced digital pulse signal. Through this application, the object under test and the positive pulse command signal generating circuit can be isolated, avoiding the phenomenon that the object under test cannot operate normally or even is damaged due to abnormalities in the positive pulse command signal generating circuit.

[0085] Based on the same inventive concept, a ground detection device corresponding to the positive pulse command signal generating circuit of the ground detection device is also provided in the embodiment of the present application. Since the principle of solving the problem by the ground detection device in the embodiment of the present application is similar to the positive pulse command signal generating circuit of the ground detection device in the embodiment of the present application, the implementation of the ground detection device can refer to the implementation of the positive pulse command signal generating circuit of the ground detection device, and the repeated parts will not be repeated.

[0086] An embodiment of the present application provides a ground detection device, the ground detection device comprising a processor, a positive pulse command signal generating circuit of the ground detection device of any one of the first aspects;

[0087] The circuit includes a digital isolation module, a drive and output current monitoring module, a high-side switch and a power supply module; the processor in the ground detection device is connected to the input end of the digital isolation module; the output end of the digital isolation module is connected to the first input end of the drive and output current monitoring module; the output end of the drive and output current monitoring module is connected to the first input end of the high-side switch; the first output end of the high-side switch is connected to the second input end of the drive and output current monitoring module; the second output end of the high-side switch is connected to the object to be measured; the output end of the power supply module is connected to the second input end of the high-side switch;

[0088] The digital isolation module is used to isolate and transmit the digital pulse signal sent by the processor to the drive and output current monitoring module; and send the isolated digital pulse signal to the drive and output current monitoring module;

[0089] The driving and output current monitoring module is used to enhance the driving capability of the isolated digital pulse signal and send the enhanced digital pulse signal to the high-side switch when the output current monitoring signal output by the high-side switch meets the preset numerical condition; the output current monitoring signal is a signal output by the output current of the high-side switch after passing through the sampling resistor and operational amplifier inside the high-side switch;

[0090] The high-side switch is used to generate a positive pulse command signal from the enhanced digital pulse signal, and send the positive pulse command signal to the object under test;

[0091] The power supply module is used to supply power to the high-side switch.

[0092] In a possible implementation, the digital isolation module includes a first operational amplifier, a second operational amplifier, a first capacitor, and a second capacitor;

[0093] The processor is connected to the input end of the first operational amplifier; the output end of the first operational amplifier is connected to one end of the first capacitor; the other end of the first capacitor is connected to one end of the second capacitor; the other end of the second capacitor is connected to the input end of the second operational amplifier; the output end of the second operational amplifier is connected to the first input end of the driving and output current monitoring module;

[0094] Among them, the input end of the first operational amplifier is the input end of the digital isolation module; the output end of the second operational amplifier is the output end of the digital isolation module; the first power supply of the first operational amplifier and the second power supply of the second operational amplifier are isolated from each other; the ground signal of the first operational amplifier and the ground signal of the second operational amplifier are isolated from each other; the ground signal of the first operational amplifier is connected to the ground signal of the processor; the ground signal of the second operational amplifier is connected to the ground signal of the drive and output current monitoring module.

[0095] In a possible implementation, the driving and output current monitoring module includes: a buffer driving module, a comparator;

[0096] The output end of the digital isolation module is connected to the first input end of the buffer driving module; the output end of the buffer driving module is connected to the first input end of the high-side switch; the first output end of the high-side switch is connected to the input end of the comparator; the output end of the comparator is connected to the second input end of the buffer driving module;

[0097] Wherein, the first input end of the buffer driving module is the first input end of the driving and output current monitoring module; the input end of the comparator is the second input end of the driving and output current monitoring module; the output end of the buffer driving module is the output end of the driving and output current monitoring module;

[0098] The comparator is used to compare the value corresponding to the output current monitoring signal and the voltage division value of the preset resistor; when the value corresponding to the output current monitoring signal is less than the voltage division value of the preset resistor, the comparator outputs a high level;

[0099] The buffer driving module is used to enhance the driving capability of the isolated digital pulse signal when the comparator outputs a high level, and send the enhanced digital pulse signal to the high-side switch.

[0100] In a possible implementation manner, the buffer driving module includes a third operational amplifier, a fourth operational amplifier and a fifth operational amplifier;

[0101] The output end of the digital isolation module is connected to the input end of the third operational amplifier; the output end of the third operational amplifier is connected to the first input end of the fourth operational amplifier; the output end of the fourth operational amplifier is connected to the first input end of the high-side switch; the output end of the fifth operational amplifier is connected to the second input end of the fourth operational amplifier;

[0102] Wherein, the input end of the third operational amplifier is the first input end of the buffer driving module; and the output end of the fourth operational amplifier is the output end of the buffer driving module.

[0103] The present application provides a ground detection device that can isolate the object under test and the positive pulse command signal generating circuit, thereby avoiding the phenomenon that the object under test cannot operate normally or even is damaged due to abnormalities in the positive pulse command signal generating circuit.

[0104] Those skilled in the art can clearly understand that, for the convenience and simplicity of description, the specific working process of the system and device described above can refer to the corresponding process in the method embodiment, and will not be repeated in this application. In the several embodiments provided in this application, it should be understood that the disclosed system, device and method can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation. For example, multiple modules or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0105] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0106] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0107] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the information processing method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as USB flash drives, mobile hard drives, ROM, RAM, magnetic disks, or optical disks.

[0108] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A positive pulse command signal generating circuit for ground detection equipment, characterized in that: The circuit includes a digital isolation module, a drive and output current monitoring module, a high-side switch and a power supply module; the processor in the ground detection device is connected to the input end of the digital isolation module; the output end of the digital isolation module is connected to the first input end of the drive and output current monitoring module; the output end of the drive and output current monitoring module is connected to the first input end of the high-side switch; the first output end of the high-side switch is connected to the second input end of the drive and output current monitoring module; the second output end of the high-side switch is connected to the object to be measured; the output end of the power supply module is connected to the second input end of the high-side switch; The digital isolation module is used to isolate and transmit the digital pulse signal sent by the processor to the drive and output current monitoring module; and send the isolated digital pulse signal to the drive and output current monitoring module; The driving and output current monitoring module is used to enhance the driving capability of the isolated digital pulse signal and send the enhanced digital pulse signal to the high-side switch when the output current monitoring signal output by the high-side switch meets the preset numerical condition; the output current monitoring signal is a signal output by the output current of the high-side switch after passing through the sampling resistor and operational amplifier inside the high-side switch; The high-side switch is used to generate a positive pulse command signal from the enhanced digital pulse signal, and send the positive pulse command signal to the object under test; The power supply module is used to supply power to the high-side switch.

2. The positive pulse command signal generating circuit of the ground detection equipment according to claim 1, characterized in that: The digital isolation module includes a first operational amplifier, a second operational amplifier, a first capacitor and a second capacitor; The processor is connected to the input end of the first operational amplifier; the output end of the first operational amplifier is connected to one end of the first capacitor; the other end of the first capacitor is connected to one end of the second capacitor; the other end of the second capacitor is connected to the input end of the second operational amplifier; the output end of the second operational amplifier is connected to the first input end of the driving and output current monitoring module; Among them, the input end of the first operational amplifier is the input end of the digital isolation module; the output end of the second operational amplifier is the output end of the digital isolation module; the first power supply of the first operational amplifier and the second power supply of the second operational amplifier are isolated from each other; the ground signal of the first operational amplifier and the ground signal of the second operational amplifier are isolated from each other; the ground signal of the first operational amplifier is connected to the ground signal of the processor; the ground signal of the second operational amplifier is connected to the ground signal of the drive and output current monitoring module.

3. The positive pulse command signal generating circuit of the ground detection equipment according to claim 1, characterized in that: The driving and output current monitoring module includes: a buffer driving module and a comparator; The output end of the digital isolation module is connected to the first input end of the buffer driving module; the output end of the buffer driving module is connected to the first input end of the high-side switch; the first output end of the high-side switch is connected to the input end of the comparator; the output end of the comparator is connected to the second input end of the buffer driving module; Wherein, the first input end of the buffer driving module is the first input end of the driving and output current monitoring module; the input end of the comparator is the second input end of the driving and output current monitoring module; the output end of the buffer driving module is the output end of the driving and output current monitoring module; The comparator is used to compare the value corresponding to the output current monitoring signal and the voltage division value of the preset resistor; when the value corresponding to the output current monitoring signal is less than the voltage division value of the preset resistor, the comparator outputs a high level; The buffer driving module is used to enhance the driving capability of the isolated digital pulse signal when the comparator outputs a high level, and send the enhanced digital pulse signal to the high-side switch.

4. The positive pulse command signal generating circuit of the ground detection equipment according to claim 3, characterized in that: The buffer driving module includes a third operational amplifier, a fourth operational amplifier and a fifth operational amplifier; The output end of the digital isolation module is connected to the input end of the third operational amplifier; the output end of the third operational amplifier is connected to the first input end of the fourth operational amplifier; the output end of the fourth operational amplifier is connected to the first input end of the high-side switch; the output end of the fifth operational amplifier is connected to the second input end of the fourth operational amplifier; Wherein, the input end of the third operational amplifier is the first input end of the buffer driving module; and the output end of the fourth operational amplifier is the output end of the buffer driving module.

5. The positive pulse command signal generating circuit of the ground detection equipment according to claim 3, characterized in that: The comparator includes the preset resistor, the target resistor and a sixth operational amplifier; The first output terminal of the high-side switch is connected to the negative input terminal of the sixth operational amplifier; the preset resistor is connected to the positive input terminal of the sixth operational amplifier; the output terminal of the sixth operational amplifier is respectively connected to one end of the target resistor and the second input terminal of the buffer driving module; Wherein, the negative input terminal of the sixth operational amplifier is the input terminal of the comparator.

6. The positive pulse command signal generating circuit of the ground detection equipment according to any one of claims 1 to 5, characterized in that: The power supply module includes: an input power supply and an isolated switching power supply; The output end of the input power supply is connected to the input end of the isolated switching power supply, and the output end of the isolated switching power supply is connected to the second input end of the high-side switch; The input power source generates a power supply that meets the voltage standard required by the positive pulse command signal through the isolated switching power supply, and supplies power to the high-side switch through the power supply.

7. A ground detection device, characterized in that: The ground detection device comprises a processor, a positive pulse command signal generating circuit of the ground detection device according to any one of claims 1 to 6; The circuit includes a digital isolation module, a drive and output current monitoring module, a high-side switch and a power supply module; the processor in the ground detection device is connected to the input end of the digital isolation module; the output end of the digital isolation module is connected to the first input end of the drive and output current monitoring module; the output end of the drive and output current monitoring module is connected to the first input end of the high-side switch; the first output end of the high-side switch is connected to the second input end of the drive and output current monitoring module; the second output end of the high-side switch is connected to the object to be measured; the output end of the power supply module is connected to the second input end of the high-side switch; The digital isolation module is used to isolate and transmit the digital pulse signal sent by the processor to the drive and output current monitoring module; and send the isolated digital pulse signal to the drive and output current monitoring module; The driving and output current monitoring module is used to enhance the driving capability of the isolated digital pulse signal and send the enhanced digital pulse signal to the high-side switch when the output current monitoring signal output by the high-side switch meets the preset numerical condition; the output current monitoring signal is a signal output by the output current of the high-side switch after passing through the sampling resistor and operational amplifier inside the high-side switch; The high-side switch is used to generate a positive pulse command signal from the enhanced digital pulse signal, and send the positive pulse command signal to the object under test; The power supply module is used to supply power to the high-side switch.

8. The ground detection device according to claim 7, characterized in that: The digital isolation module includes a first operational amplifier, a second operational amplifier, a first capacitor and a second capacitor; The processor is connected to the input end of the first operational amplifier; the output end of the first operational amplifier is connected to one end of the first capacitor; the other end of the first capacitor is connected to one end of the second capacitor; the other end of the second capacitor is connected to the input end of the second operational amplifier; the output end of the second operational amplifier is connected to the first input end of the driving and output current monitoring module; Among them, the input end of the first operational amplifier is the input end of the digital isolation module; the output end of the second operational amplifier is the output end of the digital isolation module; the first power supply of the first operational amplifier and the second power supply of the second operational amplifier are isolated from each other; the ground signal of the first operational amplifier and the ground signal of the second operational amplifier are isolated from each other; the ground signal of the first operational amplifier is connected to the ground signal of the processor; the ground signal of the second operational amplifier is connected to the ground signal of the drive and output current monitoring module.

9. The ground detection device according to claim 7, characterized in that: The driving and output current monitoring module includes: a buffer driving module and a comparator; The output end of the digital isolation module is connected to the first input end of the buffer driving module; the output end of the buffer driving module is connected to the first input end of the high-side switch; the first output end of the high-side switch is connected to the input end of the comparator; the output end of the comparator is connected to the second input end of the buffer driving module; Wherein, the first input end of the buffer driving module is the first input end of the driving and output current monitoring module; the input end of the comparator is the second input end of the driving and output current monitoring module; the output end of the buffer driving module is the output end of the driving and output current monitoring module; The comparator is used to compare the value corresponding to the output current monitoring signal and the voltage division value of the preset resistor; when the value corresponding to the output current monitoring signal is less than the voltage division value of the preset resistor, the comparator outputs a high level; The buffer driving module is used to enhance the driving capability of the isolated digital pulse signal when the comparator outputs a high level, and send the enhanced digital pulse signal to the high-side switch.

10. The ground detection device according to claim 9, characterized in that: The buffer driving module includes a third operational amplifier, a fourth operational amplifier and a fifth operational amplifier; The output end of the digital isolation module is connected to the input end of the third operational amplifier; the output end of the third operational amplifier is connected to the first input end of the fourth operational amplifier; the output end of the fourth operational amplifier is connected to the first input end of the high-side switch; the output end of the fifth operational amplifier is connected to the second input end of the fourth operational amplifier; Wherein, the input end of the third operational amplifier is the first input end of the buffer driving module; and the output end of the fourth operational amplifier is the output end of the buffer driving module.

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