CN212723249U - Fault detection device - Google Patents
Fault detection device Download PDFInfo
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- CN212723249U CN212723249U CN202021203380.6U CN202021203380U CN212723249U CN 212723249 U CN212723249 U CN 212723249U CN 202021203380 U CN202021203380 U CN 202021203380U CN 212723249 U CN212723249 U CN 212723249U
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Abstract
The embodiment of the application discloses a fault detection device, which comprises a first resistor, a second resistor, an equivalent power supply, a first voltage detection device, a second voltage detection device and a third voltage detection device; the first end of the first resistor is connected with the first node, and the second end of the first resistor is connected with the second node; the first end of the second resistor is connected with the second node, and the second end of the second resistor is connected with the third node; the first end of the equivalent power supply is connected with the first node, and the second end of the equivalent power supply is connected with the third node; the first end of the first voltage detection device is connected with the first node, and the second end of the first voltage detection device is connected with the second node; the first voltage detection device is used for detecting the voltage value of the first resistor; the first end of the second voltage detection device is connected with the second node, and the second end of the second voltage detection device is connected with the third node; the second voltage detection device is used for detecting the voltage value of the second resistor; the third voltage detection means is in parallel relationship with either the first resistor or the second resistor.
Description
Technical Field
The application relates to the technical field of automobile overhaul, in particular to a fault detection device.
Background
With the continuous development of automobile technology, the requirements of people on the safety of vehicles are also continuously improved,
among them, whether the vehicle power leaks electricity is an important part in the safety detection of the vehicle. In the related art, vehicle leakage detection is mainly performed by a resistance detection mode, which is prone to measurement errors and poor in detection accuracy.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the present application provides a fault detection device, which forms a redundancy detection mechanism with a first voltage detection device and a second voltage detection device through a third voltage detection device, and when a fault occurs in the first voltage detection device or the second voltage detection device, the fault detection device can find the fault in time through the third voltage detection device, so that the fault detection device has a self-checking function, and the fault detection accuracy is improved.
The embodiment of the application discloses the following technical scheme:
the embodiment of the application provides a fault detection device, which comprises a first resistor, a second resistor, an equivalent power supply, a first voltage detection device, a second voltage detection device and a third voltage detection device;
a first end of the first resistor is connected with a first node, and a second end of the first resistor is connected with a second node;
a first end of the second resistor is connected with the second node, and a second end of the second resistor is connected with a third node;
a first end of the equivalent power supply is connected with the first node, and a second end of the equivalent power supply is connected with the third node;
a first end of the first voltage detection device is connected with the first node, and a second end of the first voltage detection device is connected with the second node; the first voltage detection device is used for detecting the voltage value of the first resistor;
a first end of the second voltage detection device is connected with the second node, and a second end of the second voltage detection device is connected with the third node; the second voltage detection device is used for detecting the voltage value of the second resistor;
the third voltage detection means is in parallel relation with either the first resistor or the second resistor.
Optionally, the apparatus further comprises a first capacitor and a second capacitor:
a first end of the first capacitor is connected with the first node, and a second end of the first capacitor is connected with the second node;
and the first end of the second capacitor is connected with the second node, and the second end of the second capacitor is connected with the third node.
Optionally, the apparatus further includes a fourth voltage detection device:
the fourth voltage detection means is in parallel relationship with one of the first resistance and the second resistance which is not in parallel relationship with the third voltage detection means.
Optionally, the voltage detection device includes a resistor and a switch.
According to the technical scheme, the fault detection device represents a vehicle power supply through an equivalent power supply, the first resistor and the second resistor represent a positive electrode ground resistance and a negative electrode ground resistance of the vehicle power supply respectively, the first resistor and the second resistor are detected through the first detection device and the second detection device respectively, and a redundancy detection mechanism is formed through the third detection device and the first detection device and the second detection device, so that when the first detection device or the second detection device breaks down, the fault detection device can find the fault in time through the third detection device, and the fault detection accuracy is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a block diagram of a fault detection apparatus according to an embodiment of the present disclosure;
fig. 2 is a block diagram of a fault detection apparatus according to an embodiment of the present disclosure;
fig. 3 is a block diagram of a fault detection apparatus according to an embodiment of the present disclosure;
fig. 4 is a block diagram of a fault detection apparatus according to an embodiment of the present application.
Detailed Description
Embodiments of the present application are described below with reference to the accompanying drawings.
In the related art, the detection of the vehicle leakage condition is mainly achieved by detecting the resistance value between the vehicle power supply and the vehicle body casing (i.e., the ground), and when the vehicle has the leakage condition, the resistance value between the vehicle power supply and the vehicle body casing is reduced. The resistance value is mainly divided into a resistance value between the positive pole of the vehicle power supply and the vehicle body shell and a resistance value between the negative pole of the vehicle power supply and the vehicle body shell, so that the resistance values of the two are respectively detected mainly by two detection devices.
However, the related art fault detection device has poor safety because the detection device itself may be faulty, the detected resistance value may have errors, and the vehicle leakage condition cannot be accurately detected.
In order to solve the technical problem, the present application provides a fault detection device, which forms a redundancy detection mechanism with a first voltage detection device and a second voltage detection device through a third voltage detection device, and when a fault occurs in the first voltage detection device or the second voltage detection device, the fault detection device can find the fault in time through the third voltage detection device, so that the fault detection device has a self-checking function, and the fault detection accuracy is improved.
In order to facilitate understanding of the technical solutions provided by the embodiments of the present application, a fault detection apparatus provided by the embodiments of the present application will be described below with reference to the accompanying drawings. Referring to fig. 1, fig. 1 is a block diagram of a fault detection apparatus 100 according to an embodiment of the present disclosure, where the apparatus 100 includes a first resistor 101, a second resistor 102, an equivalent power source 103, a first voltage detection apparatus 104, a second voltage detection apparatus 105, and a third voltage detection apparatus 106.
The equivalent power supply 103 can equivalently represent a vehicle power supply, and the first resistor 101 can equivalently represent the resistance from the positive electrode of the vehicle power supply to the ground terminal; the second resistor 102 can equivalently represent the resistance from the negative pole of the vehicle power supply to the ground; the first voltage detection device 104 is used for detecting the voltage value at two ends of the first resistor 101; the second voltage detection device 105 is used for detecting the voltage value at two ends of the second resistor 102, and the third voltage detection device is used for carrying out redundancy detection on the voltage value of the first resistor 101 or the second resistor 102. The specific connection relationship is shown in fig. 1:
a first end of the first resistor 101 is connected with the node 1, and a second end is connected with the node 2; a first end of the second resistor 102 is connected with the node 2, and a second end is connected with the node 3; the first section of the equivalent power supply 103 is connected with the node 1, and the second end of the equivalent power supply is connected with the node 3; the first end of the first voltage detection device 104 is connected to the node 1, the second end is connected to the node 2, and the first voltage detection device and the first resistor 101 are connected in parallel; the first end of the second voltage detection device 105 is connected with the node 2, the second end is connected with the node 3, and the second voltage detection device and the second resistor 102 are in parallel connection; in the embodiment of the present application, the third voltage detection device 106 can perform redundant detection on the voltage of the first resistor 101, so that the first end of the third voltage detection device 106 is connected to the node 1, and the second end is connected to the node 2, and is in parallel relation with the first resistor 101.
After the first voltage detection device 104 and the second voltage detection device 105 respectively detect the voltages of the first resistor 101 and the second resistor 102, whether the detected voltage values are accurate or not can be determined based on the voltage values detected by the third voltage detection device 106. For example, when the voltage values detected by the first voltage detection device 104 and the third voltage detection device 106 are different, the voltage values detected by the first voltage detection device 104 and the third voltage detection device 106 may be combined with the voltage value detected by the second voltage detection device 105 to calculate, so as to obtain two sets of resistance values, and further determine which set of resistance values is closer to the true condition, thereby determining whether the fault detection circuit has a problem.
According to the technical scheme, the fault detection device represents a vehicle power supply through an equivalent power supply, the first resistor and the second resistor represent a positive electrode ground resistance and a negative electrode ground resistance of the vehicle power supply respectively, the first resistor and the second resistor are detected through the first detection device and the second detection device respectively, and a redundancy detection mechanism is formed through the third detection device and the first detection device and the second detection device, so that when the first detection device or the second detection device breaks down, the fault detection device can find the fault in time through the third detection device, and the fault detection accuracy is improved.
It will be appreciated that for more realistic simulation of a vehicle, in one possible implementation, the apparatus 100 may further comprise a first capacitor 107 and a second capacitor 108, as shown in fig. 2. The first capacitor 107 is used for equivalently representing a capacitance from the anode of the vehicle power supply to the ground, and the second capacitor 108 is used for equivalently representing a capacitance from the cathode of the vehicle power supply to the ground.
It will be appreciated that in order to more accurately self-test the fault detection device 100 and further improve the accuracy of the detection, in one possible implementation, as shown in fig. 3, the device 100 may further include a fourth voltage detection device 109. The voltage detection device 109 is used for performing redundant detection on one of the first resistor 101 and the second resistor 102 which is not detected by the third voltage detection device 106, so that the voltage values detected by the first and second voltage detection devices can be subjected to redundant correction according to the voltage value detected by the fourth voltage detection device 109, and the accuracy of the detected value is improved.
In order to realize the above function, the connection relationship of the fourth voltage detection device 109 may be as follows: the fourth voltage detection means 109 is in parallel relation with one of the first resistor 101 and the second resistor 102 which is not in parallel relation with the third voltage detection means 106. For example, in fig. 4, the fourth voltage detection device 109 is in parallel relationship with the second resistor 102.
It is to be understood that there are various types of devices capable of voltage detection, and thus the internal structure of the above-described voltage detection device may also include various types. In one possible implementation, the voltage detection means may comprise a resistor and a switch. As shown in fig. 4, the first voltage detection device 104, the second voltage detection device 105, and the third voltage detection device 106 each include a switch and a resistor. The two ends of the switch may be connected to a voltage detection chip or the like, so as to detect the voltage of the first resistor 101 and the second resistor 102.
Those of ordinary skill in the art will understand that: all or part of the steps for realizing the method embodiments can be completed by hardware related to program instructions, the program can be stored in a computer readable storage medium, and the program executes the steps comprising the method embodiments when executed; and the aforementioned storage medium may be at least one of the following media: various media that can store program codes, such as read-only memory (ROM), RAM, magnetic disk, or optical disk.
It should be noted that, in the present specification, all the embodiments are described in a progressive manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the apparatus and system embodiments, since they are substantially similar to the method embodiments, they are described in a relatively simple manner, and reference may be made to some of the descriptions of the method embodiments for related points. The above-described embodiments of the apparatus and system are merely illustrative, and the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
The above description is only one specific embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present application should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (4)
1. A fault detection device is characterized in that the device comprises a first resistor, a second resistor, an equivalent power supply, a first voltage detection device, a second voltage detection device and a third voltage detection device;
a first end of the first resistor is connected with a first node, and a second end of the first resistor is connected with a second node;
a first end of the second resistor is connected with the second node, and a second end of the second resistor is connected with a third node;
a first end of the equivalent power supply is connected with the first node, and a second end of the equivalent power supply is connected with the third node;
a first end of the first voltage detection device is connected with the first node, and a second end of the first voltage detection device is connected with the second node; the first voltage detection device is used for detecting the voltage value of the first resistor;
a first end of the second voltage detection device is connected with the second node, and a second end of the second voltage detection device is connected with the third node; the second voltage detection device is used for detecting the voltage value of the second resistor;
the third voltage detection means is in parallel relation with either the first resistor or the second resistor.
2. The apparatus of claim 1, further comprising a first capacitance and a second capacitance:
a first end of the first capacitor is connected with the first node, and a second end of the first capacitor is connected with the second node;
and the first end of the second capacitor is connected with the second node, and the second end of the second capacitor is connected with the third node.
3. The apparatus of claim 1, further comprising a fourth voltage detection device:
the fourth voltage detection means is in parallel relationship with one of the first resistance and the second resistance which is not in parallel relationship with the third voltage detection means.
4. The apparatus of claim 1, wherein the voltage detection means comprises a resistor and a switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021203380.6U CN212723249U (en) | 2020-06-24 | 2020-06-24 | Fault detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021203380.6U CN212723249U (en) | 2020-06-24 | 2020-06-24 | Fault detection device |
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| Publication Number | Publication Date |
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| CN212723249U true CN212723249U (en) | 2021-03-16 |
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| CN202021203380.6U Active CN212723249U (en) | 2020-06-24 | 2020-06-24 | Fault detection device |
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