A direct current voltage acquisition device for an armored vehicle
By designing a miniature voltage acquisition device that integrates voltage divider, isolation amplifier, and operational amplifier circuits, the problems of synchronous acquisition difficulties and safety hazards in the electrical testing of armored vehicles were solved, and safe, accurate, and synchronous measurement of the voltage of the armored vehicle power grid was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XINXIANG NORTH VEHICLE NETEER CO
- Filing Date
- 2025-04-23
- Publication Date
- 2026-06-09
AI Technical Summary
Traditional digital multimeters cannot accurately collect instantaneous peak and surge data of the power grid during electrical tests of armored vehicles, and pose safety hazards. Furthermore, synchronous data collection is difficult and affected by harsh environments.
Design a DC voltage acquisition device including a tank, a sealing cover, a circuit board, and an aviation connector. Integrate voltage divider, isolation amplification, and operational amplification circuits to form a miniature voltage signal acquisition module. Connect the module to test points via the aviation connector to achieve multi-point synchronous real-time measurement.
It enables safe and accurate voltage measurement in confined spaces, avoids direct contact between the instrument and high voltage, reduces safety hazards, and ensures synchronous data acquisition and stability.
Smart Images
Figure CN224341597U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to voltage measurement technology, specifically to a DC voltage acquisition device for armored vehicles. Background Technology
[0002] In traditional electrical testing of armored vehicles, it is necessary to perform multi-point, synchronous, real-time measurements of the vehicle's 28V, 270V, and 900V electrical power grids. Currently, the main method for conducting electrical tests on armored vehicles is through digital multimeters. This method is inconvenient, unreliable, and has several problems, including the following:
[0003] 1. Digital multimeters are bulky and most have some filtering capabilities, so they cannot accurately collect instantaneous peak and surge data of the power grid;
[0004] 2. Testers need to collect data inside the vehicle, and multiple sets of data cannot be collected simultaneously, so the test results are affected by the harsh environment;
[0005] 3. Digital multimeters and other instruments have limited withstand voltage ratings for measuring DC voltage, which poses safety hazards in high-voltage measurement environments. Utility Model Content
[0006] To address the problems in the existing technology, this utility model provides a DC voltage acquisition device for armored vehicles, which aims to facilitate testers in safely measuring the DC grid voltage of armored vehicles.
[0007] A DC voltage acquisition device for armored vehicles includes a slot with an open top. A sealing cover is provided on the opening of the slot, forming a sealed cavity between the sealing cover and the slot. A circuit board is fixedly installed inside the sealed cavity. Two aviation connectors are fixedly installed on the side wall of the slot, penetrating and sealed to the side wall of the slot. The circuit board is equipped with a voltage divider circuit, an isolation amplifier circuit, and an operational amplifier circuit. One aviation connector is electrically connected to the input terminal of the voltage divider circuit, which divides the voltage acquired by the aviation connector. The output terminal of the voltage divider circuit is connected to the input terminal of the isolation amplifier circuit, and the output terminal of the isolation amplifier circuit is connected to the operational amplifier circuit, which isolates and amplifies the divided voltage signal. The output terminal of the operational amplifier circuit is electrically connected to its input terminal, which further amplifies the isolated and amplified voltage signal. The output terminal of the operational amplifier circuit is electrically connected to the other aviation connector.
[0008] Furthermore, the tank has a long strip structure, with two aviation connectors located on the two end faces of the tank.
[0009] Furthermore, support pillars are distributed on the inner wall of the tank corresponding to the edge of the circuit board. The edge of the circuit board is fixed to the support pillars by screws, forming an isolation gap between it and the inner wall of the tank. The operational amplifier circuit is located in the middle area of the circuit board.
[0010] Furthermore, the voltage divider circuit includes resistors R1, R7, and R4. Resistors R1 and R7 are connected in series and then in parallel to the positive and negative pins of the aviation connector. The common terminal of resistors R1 and R7 is connected to one end of resistor R4, and the other end of resistor R4 serves as the output terminal of the voltage divider circuit.
[0011] Furthermore, the isolation voltage divider circuit includes an NSI1312D chip, and the VIN pin of the NSI1312D chip is connected to the output terminal of the voltage divider circuit.
[0012] Furthermore, the operational amplifier circuit includes an OP07M / TR chip. One branch of the OP07M / TR chip's IN- pin is connected to one end of resistor R3, and the other branch is connected to its OUT pin via resistor R2. The other end of resistor R3 serves as the first input terminal of the operational amplifier circuit. One branch of the OP07M / TR chip's IN+ pin is grounded via resistor R8, and the other branch is connected to one end of resistor R6. The other end of resistor R6 serves as the second input terminal of the operational amplifier circuit.
[0013] Furthermore, the output of the operational amplifier circuit is electrically connected to the aviation connector via resistor R5.
[0014] Furthermore, the common terminal of resistor R5 and the aviation connector is grounded via capacitors C9 and C10, respectively.
[0015] The beneficial effects of this utility model are as follows: By integrating two aviation connectors and circuit boards together through the groove and sealing cover, a miniature voltage signal acquisition module is formed, which facilitates operation in a relatively narrow space, while avoiding direct acquisition of voltage signals through the instrument, thus effectively protecting the instrument. Attached Figure Description
[0016] Figure 1 This is a cross-sectional structural diagram of the present invention;
[0017] Figure 2 This is a circuit diagram of the circuit board in this utility model. Detailed Implementation
[0018] The present invention will now be described in detail with reference to the accompanying drawings. Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention. The directional terms such as left, center, right, top, and bottom in the embodiments of the present invention are only relative concepts or referenced to the normal use state of the product, and should not be considered restrictive.
[0019] A DC voltage acquisition device for armored vehicles, such as Figure 1 As shown, the device includes a groove 1 with an opening at the top. A sealing cover 2 is provided over the opening of the groove 1. A sealing rubber strip 3 is placed between the sealing cover 2 and the groove opening of the groove 1, forming a sealed cavity between the sealing cover 2 and the groove 1. A circuit board 5 is fixedly installed inside the sealed cavity. Two aviation connectors 4 are fixedly installed on the side wall of the groove 1, passing through and sealing the side wall of the groove 1. The circuit board 5 is equipped with a voltage divider circuit, an isolation amplifier circuit, and an operational amplifier circuit. One aviation connector 4 is electrically connected to the input terminal of the voltage divider circuit, which is used to divide the voltage collected by the aviation connector 4 (-1.2V ~ +1.2V). The output terminal of the voltage divider circuit is connected to the input terminal of the isolation amplifier circuit, and the output terminal of the isolation amplifier circuit is connected to the operational amplifier circuit. The isolation amplifier circuit is used to isolate and amplify the divided voltage signal (-1.2V ~ +1.2V). +1.2V), in this embodiment, the amplification factor of the isolation amplifier circuit is 1; the output terminal of the operational amplifier circuit is electrically connected to the input terminal of the operational amplifier circuit. The operational amplifier circuit is used to further amplify the voltage signal after isolation amplification (-8 ~ +8V) to obtain a stable and accurate voltage signal; the output terminal of the operational amplifier circuit is electrically connected to another aviation connector 4. To facilitate miniaturization of this utility model, the slot 1 is a long strip structure, and the two aviation connectors 4 are located on the end faces of the two ends of the slot 1 respectively; to avoid the temperature of the slot 1 affecting the performance of the operational amplifier circuit under extreme environments, support pillars 11 are distributed on the inner wall of the slot 1 corresponding to the edge of the circuit board 5. The edge part of the circuit board 5 is fixedly connected to the support pillars 11 by screws 6 and forms an isolation gap with the inner wall of the slot 1. The operational amplifier circuit is located in the middle area of the circuit board 5.
[0020] In order to address the safety hazards existing in high-voltage measurement environments and effectively protect this utility model, such as Figure 2As shown, the voltage divider circuit includes resistors R1, R7, and R4. Resistors R1 and R7 are connected in series and then in parallel to the positive and negative pins of the aviation connector. The common terminal of resistors R1 and R7 is connected to one end of resistor R4, and the other end of resistor R4 serves as the output terminal of the voltage divider circuit. Resistors R1 and R7 are high-voltage, high-resistance, and high-precision voltage divider resistors, while resistor R4 is a current-limiting resistor, thus protecting the isolation voltage divider circuit. To facilitate the surface mount production of this invention, the isolation voltage divider circuit includes an NSI1312D chip. The VIN pin of the NSI1312D chip is connected to the output of the voltage divider circuit; the VDD1 and VDD2 pins of the NSI1312D chip are connected to two independent power supplies respectively. The SHTDN pin of the NSI1312D chip is grounded through resistor R9. Another branch of the VIN pin of the NSI1312D chip is grounded after passing through capacitors C5 and C11 in sequence. The common terminal of capacitors C5 and C11 is electrically connected to the SHTDN pin of the NSI1312D chip, thereby effectively reducing power consumption and extending the service life of the power supply; to improve the acquisition voltage... To ensure stability and accuracy, and to adapt to testing environments with weak voltages, the operational amplifier circuit includes an OP07M / TR chip. One branch of the OP07M / TR chip's IN- pin is connected to one end of resistor R3, and the other branch is connected to its OUT pin via resistor R2. The other end of resistor R3 serves as the first input terminal of the operational amplifier circuit and is connected to the OUTN pin of the NSI1312D chip. One branch of the OP07M / TR chip's IN+ pin is grounded via resistor R8, and the other branch is connected to one end of resistor R6. The other end of resistor R6... One end serves as the second input terminal of the operational amplifier circuit and is connected to the OUTP pin of the NSI1312D chip; to improve the stability of the power supply of the OP07M / TR chip, the VCC+ and VCC- pins of the OP07M / TR chip are grounded through capacitors C8 and C7, respectively; to ensure the safety of the downstream circuit, the OUT pin of the OP07M / TR chip is electrically connected to the aviation connector through resistor R5; to ensure the stability of the output signal, resistor R5 and the common terminal of the aviation connector are grounded through capacitors C9 and C10, respectively.
[0021] In use, several of these inventions are connected to the testing instrument via cables, and then connected to multiple test points via aviation connectors, thereby enabling multi-point synchronous real-time measurement and acquisition of voltage at multiple points on the armored vehicle's electrical grid.
[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A DC voltage acquisition device for armored vehicles, characterized in that: The device includes a groove with an opening at the top. A sealing cover is installed on the opening of the groove, forming a sealed cavity between the sealing cover and the groove. A circuit board is fixedly installed inside the sealed cavity. Two aviation connectors are fixedly installed on the side wall of the groove, penetrating and sealed to the side wall of the groove. The circuit board is equipped with a voltage divider circuit, an isolation amplifier circuit, and an operational amplifier circuit. One aviation connector is electrically connected to the input terminal of the voltage divider circuit, which divides the voltage acquired by the aviation connector. The output terminal of the voltage divider circuit is connected to the input terminal of the isolation amplifier circuit, and the output terminal of the isolation amplifier circuit is connected to the operational amplifier circuit, which isolates and amplifies the voltage signal after voltage division. The output terminal of the operational amplifier circuit is electrically connected to the input terminal of the operational amplifier circuit, which further amplifies the isolated and amplified voltage signal. The output terminal of the operational amplifier circuit is electrically connected to the other aviation connector.
2. The DC voltage acquisition device for armored vehicles according to claim 1, characterized in that: The tank has a long strip structure, with two aviation connectors located on the two end faces of the tank.
3. The DC voltage acquisition device for armored vehicles according to claim 1, characterized in that: Support pillars are distributed on the inner wall of the tank, corresponding to the edge of the circuit board. The edge of the circuit board is fixed to the support pillars with screws, forming an isolation gap between it and the inner wall of the tank. The operational amplifier circuit is located in the middle area of the circuit board.
4. The DC voltage acquisition device for armored vehicles according to claim 1, characterized in that: The voltage divider circuit includes resistors R1, R7, and R4. Resistors R1 and R7 are connected in series and then in parallel to the positive and negative pins of the aviation connector. The common terminal of resistors R1 and R7 is connected to one end of resistor R4, and the other end of resistor R4 serves as the output terminal of the voltage divider circuit.
5. The DC voltage acquisition device for armored vehicles according to claim 1, characterized in that: The isolation voltage divider circuit includes an NSI1312D chip, and the VIN pin of the NSI1312D chip is connected to the output of the voltage divider circuit.
6. The DC voltage acquisition device for armored vehicles according to claim 1, characterized in that: The operational amplifier circuit includes an OP07M / TR chip. One branch of the OP07M / TR chip's IN- pin is connected to one end of resistor R3, and the other branch is connected to its OUT pin via resistor R2. The other end of resistor R3 serves as the first input terminal of the operational amplifier circuit. One branch of the OP07M / TR chip's IN+ pin is grounded via resistor R8, and the other branch is connected to one end of resistor R6. The other end of resistor R6 serves as the second input terminal of the operational amplifier circuit.
7. The DC voltage acquisition device for armored vehicles according to claim 1 or 6, characterized in that: The output of the operational amplifier circuit is electrically connected to the aviation connector via resistor R5.
8. The DC voltage acquisition device for armored vehicles according to claim 7, characterized in that: The common terminal of resistor R5 and the aviation connector is grounded through capacitors C9 and C10, respectively.