A PB bus resistance measurement device

Abstract

This utility model discloses a PB bus resistance measurement device. By integrating a measuring head and an automated measurement circuit, it realizes the automatic measurement of the resistance values ​​of J5, J7, and J9 connectors. Users only need to connect the connector to be tested to the external connector and select the appropriate measurement range by turning a knob. The device can automatically complete the measurement process, greatly improving measurement efficiency and reducing manual operation time, thus solving the problem of low efficiency. The operation is simple and intuitive by selecting different resistance measurement ranges by turning a knob. Users do not need to have professional measurement skills or experience to easily complete the measurement task. This solves the shortcomings of traditional measurement methods, which require users to have certain professional knowledge and skills, are complicated to operate, and are prone to errors. In addition, the measuring head has a recording function and can automatically save the measurement results. Through the USB interface, users can download and export the measurement data to external devices for convenient subsequent data processing and analysis.

Description

Technical Field

[0001] This utility model relates to the field of PB bus resistance measurement technology, and in particular to a PB bus resistance measurement device. Background Technology

[0002] During the maintenance of the 300S EMU train control onboard equipment, it is necessary to measure the resistance value of the PB bus. During the measurement, the operator needs to use the J5, J7, and J9 connectors to make the measurement. There are as many as 44 points on the three connectors, and 22 resistance values ​​need to be measured. The existing technology can only use a multimeter to measure. However, this method requires two people to use the multimeter probes to align with the points to be measured in order to complete the measurement. This is not only inefficient, but also prone to measurement errors due to human factors. Utility Model Content

[0003] In view of this, the present invention proposes a PB bus resistance measurement device, which can solve the defects of low efficiency and measurement error caused by human factors in the existing technology.

[0004] The technical solution of this utility model is implemented as follows:

[0005] A PB bus resistance measurement device, comprising:

[0006] The housing is used to mount the measuring instrument head, power switch, power supply interface, USB interface, external connector and knob;

[0007] The measuring head is used to measure, display, and record the resistance value of the PB bus connected to the J5, J7, or J9 connectors.

[0008] The power switch is used to control the power supply to the measuring instrument and is electrically connected to the power supply interface.

[0009] The power supply interface is used to connect to an external power supply to provide working power to the measuring instrument head;

[0010] The USB interface is used to download and export measurement data and is electrically connected to the measuring instrument head.

[0011] External connectors are used to connect to the J5, J7, or J9 connectors whose resistance is to be measured.

[0012] The knob is used to select different resistance measurement ranges.

[0013] As a further optional embodiment of the PB bus resistance measuring device, the measuring head includes:

[0014] The display module is used to display the measured resistance value in real time;

[0015] A resistance measurement chip used to measure the resistance of the PB bus;

[0016] A memory used to automatically save measurement results during the measurement process;

[0017] Wiring module for connecting to external connectors;

[0018] The control module includes a display module, a resistance measurement chip, and a memory, all of which are electrically connected to the control module.

[0019] As a further optional embodiment of the PB bus resistance measurement device, the display module includes an LM016L chip display circuit, the resistance measurement chip includes an AD5933 chip circuit, the memory includes a CAT24C512W chip circuit, the wiring module includes a CH341T chip circuit, and the control module includes an AT89C51 chip circuit.

[0020] As a further alternative to the PB bus resistance measuring device, the measuring head, power switch, power supply interface, USB interface, and knob are mounted on the same side of the housing, while the external connector is mounted on the other side of the housing.

[0021] The beneficial effects of this invention are as follows: By integrating a measuring head and an automated measuring circuit, it realizes the automatic measurement of the resistance values ​​of J5, J7, and J9 connectors. Users only need to connect the connector to be tested to the external connector and select the appropriate measurement range using the knob. The device can automatically complete the measurement process without manual intervention. Compared with the traditional manual measurement method, it greatly improves measurement efficiency and reduces manual operation time, thus solving the problem of low efficiency. The operation is simple and intuitive by selecting different resistance measurement ranges using the knob. Users do not need to have professional measurement skills or experience to easily complete the measurement task. This solves the shortcomings of traditional measurement methods, which require users to have certain professional knowledge and skills, are complex to operate, and are prone to errors. In addition, the measuring head has a recording function and can automatically save the measurement results. Through the USB interface, users can download and export the measurement data to external devices for convenient subsequent data processing and analysis. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1This is a schematic diagram of the structure of a PB bus resistance measuring device according to the present invention;

[0024] Figure 2 This is a circuit diagram of the measuring meter in this utility model;

[0025] Explanation of reference numerals in the attached diagram: 1. Housing; 2. Measuring head; 3. Power switch; 4. Power supply interface; 5. USB interface; 6. External connector; 7. Knob. Detailed Implementation

[0026] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] refer to Figures 1 to 2 A PB bus resistance measurement device, comprising:

[0028] Housing 1, used to install measuring head 2, power switch 3, power supply interface 4, USB interface 5, external connector 6 and knob 7, and to protect internal circuits and components;

[0029] Measuring head 2 is used to measure, display, and record the resistance value of the PB bus connected to the J5, J7, or J9 connectors.

[0030] The power switch 3 is used to control the power supply to the measuring instrument head 2 and is electrically connected to the power supply interface 4 to realize the power supply switching control.

[0031] Power supply interface 4 is used to connect to an external power supply to provide a stable working power supply for the measuring head 2;

[0032] USB interface 5 is used to download and export measurement data to external devices. It is electrically connected to the measuring head 2 to realize data transmission.

[0033] External connector 6 is used to connect to the J5, J7, or J9 connectors whose resistance is to be measured.

[0034] Knob 7 allows you to select different resistance measurement settings by rotating it. Each setting corresponds to a different measurement range or accuracy to meet different measurement needs.

[0035] Specifically, when maintenance personnel need to measure the resistance of the PB bus, they first connect the external connector 6 to the connector whose resistance is to be measured (J5, J7, or J9 connector), connect the power supply interface, turn the power switch 3 to the ON position, and input the working power to the measuring meter 2. After power-on initialization, four "0"s are displayed. Turn the knob 7 to the left to the first position. At this time, the two internal contacts of the first position are connected, the measuring meter 2 starts the measurement, displays the measured resistance value, and automatically saves the measurement result. Continue turning the knob 7 to the left to the second position. At this time, the two internal contacts of the second position are connected, the measuring meter 2 starts the measurement, displays the measured resistance value, and automatically saves the measurement result. This process is repeated until the measurement is completed.

[0036] It should be noted that knob 7 has sixteen positions, each with two contacts. The two contacts of the sixteenth position are connected to the positive and negative signals of the measuring instrument head, respectively. Each of the positions from one to fifteen also has two contacts internally. One end connects to the external connector, and the other end connects to the two internal contacts of the sixteenth position. These are normally open contacts. When the knob is turned to position one, the two internal contacts of position one are connected. When the knob is turned to position two, the two internal contacts of position two are connected, and so on, up to position fifteen.

[0037] In some embodiments, the measuring head 2 includes:

[0038] The display module is used to display the measured resistance value in real time;

[0039] A resistance measurement chip used to measure the resistance of the PB bus;

[0040] A memory used to automatically save measurement results during the measurement process;

[0041] Wiring module for connecting to external connectors;

[0042] The control module includes a display module, a resistance measurement chip, and a memory, all of which are electrically connected to the control module.

[0043] Specifically, the display module can present the resistance data acquired by the resistance measurement chip in real time, allowing users to obtain results without waiting or additional operations during the measurement process. Users can quickly determine whether the resistance value of the PB bus meets the requirements, improving work efficiency. During debugging or troubleshooting, real-time display helps to quickly locate problems. The resistance measurement chip can accurately measure the resistance value of the PB bus, ensuring the reliability of the measurement results and helping to reduce misjudgments and losses caused by measurement errors. The memory automatically saves the measurement results during the measurement process, eliminating the need for manual recording by the user and avoiding recording errors or omissions caused by human factors. The automatic saving function reduces the user's workload and improves work efficiency. The wiring module is reasonably designed and can be easily connected to the external connector 6 to adapt to different measurement needs. Users can select the appropriate connector for measurement according to actual needs without replacing the entire measuring head 2. The convenient connection function reduces the cost of use and improves work efficiency.

[0044] In some embodiments, the display module includes an LM016L chip display circuit, the resistance measurement chip includes an AD5933 chip circuit, the memory includes a CAT24C512W chip circuit, the wiring module includes a CH341T chip circuit, and the control module includes an AT89C51 chip circuit.

[0045] Specifically, the LM016L, as a 16×2 character LCD display module, can clearly and intuitively display the measured resistance results in real time. Users can obtain the measurement data directly through the display screen without the need for other equipment, which is convenient and fast, improving the efficiency and readability of the measurement. The AD5933 is a high-precision impedance measurement chip. Its high-precision measurement results can meet the application scenarios with high requirements for the accuracy of PB bus resistance measurement, such as fault diagnosis of electronic equipment and circuit parameter testing. The CAT24C512W is an EEPROM chip with a storage capacity of 512Kbit (64KB). It can automatically save the measurement results during the measurement process, which allows users to review historical measurement data at any time, making it convenient to analyze and compare the measurement results, and providing a basis for subsequent fault diagnosis and performance evaluation. The CH341T is a USB to serial port chip used to realize the data conversion between USB interface and serial port.

[0046] In some embodiments, the measuring head 2, power switch 3, power supply interface 4, USB interface 5 and knob 7 are mounted on the same side of the housing 1, and the external connector 6 is mounted on the other side of the housing 1.

[0047] In this embodiment, commonly used operating components such as the measuring head 2, power switch 3, power supply interface 4, USB interface 5, and knob 7 are centrally mounted on the same side of the housing 1. This allows users to easily access and control these components during measurement operations without having to frequently switch between different sides of the housing 1, thus improving the convenience and efficiency of operation. Meanwhile, mounting the external connector 6 on the other side of the housing 1 isolates it from the measuring head 2, power switch 3, and other operating components, reducing the risk of damage caused by accidental touch or improper operation. This layout also helps protect the external connector from interference and damage from the external environment.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A PB bus resistance measurement device, characterized in that, include: The housing is used to mount the measuring instrument head, power switch, power supply interface, USB interface, external connector and knob; The measuring head is used to measure, display, and record the resistance value of the PB bus connected to the J5, J7, or J9 connectors. The power switch is used to control the power supply to the measuring instrument and is electrically connected to the power supply interface. The power supply interface is used to connect to an external power supply to provide working power to the measuring instrument head; The USB interface is used to download and export measurement data and is electrically connected to the measuring instrument head. External connectors are used to connect to the J5, J7, or J9 connectors whose resistance is to be measured. The knob is used to select different resistance measurement ranges.

2. The PB bus resistance measuring device according to claim 1, characterized in that, The measuring instrument head includes: The display module is used to display the measured resistance value in real time; A resistance measurement chip used to measure the resistance of the PB bus; A memory used to automatically save measurement results during the measurement process; Wiring module for connecting to external connectors; The control module includes a display module, a resistance measurement chip, and a memory, all of which are electrically connected to the control module.

3. The PB bus resistance measuring device according to claim 2, characterized in that, The display module includes an LM016L chip display circuit, the resistance measurement chip includes an AD5933 chip circuit, the memory includes a CAT24C512W chip circuit, the wiring module includes a CH341T chip circuit, and the control module includes an AT89C51 chip circuit.

4. The PB bus resistance measuring device according to claim 3, characterized in that, The measuring head, power switch, power supply interface, USB interface, and knob are mounted on the same side of the housing, while the external connector is mounted on the other side of the housing.

Images