Probe-type GNSS module development board structure

Abstract

The utility model discloses a probe type GNSS (Global Navigation Satellite System) module development board structure, aiming at solving the problem that the EVK development board of the existing GNSS module is difficult to cover the links of production, test, debugging, use and the like. The structure comprises a GNSS module, an EVK development board used for testing the GNSS module and bonding pads arranged on the EVK development board and used for electrically connecting the GNSS module, the bonding pads are divided into two groups, the two groups of bonding pads are located on the two sides of the GNSS module respectively, and probes electrically connected with the bonding pads are fixedly connected to the EVK development board. According to the utility model, the probes are adopted to make the GNSS development board for testing, welding is not needed during testing, the GNSS module pins can be directly contacted through the probes for testing, the problems of high cost and large number demand can be solved, the size is small, power supply is convenient, all scenes such as debugging, testing, sampling inspection, scenes, firmware upgrading and the like can be basically covered, and the testing efficiency is improved. Meanwhile, the application range is wide, use is convenient, and the efficiency of all links is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to EVK development board technical field, concretely relates to a probe type GNSS module development board structure. BACKGROUND

[0002] GNSS is the full name of global navigation satellite system, is the near space or at any place on the earth's surface for the user provides all-weather 3 dimension coordinate and speed and time information's air -based radio navigation positioning system, GNSS module is used to access the position and timing signal from satellite, receives the transmission from satellite and uses distance calculation to provide real -time position data.

[0003] Generally, GNSS module needs to test the performance index of GNSS module and the hardware scheme joint debugging when sampling inspection, acceptance and preliminary scheme, the commonly used equipment is test fixture, SOCKET (test seat) and welded EVK development board, but it is found that the test fixture is large in size, only suitable for specific occasions such as factory, and the cost of SOCKET is high, not suitable for customer sample, leading to a large number of on-site maintenance requirements, although the welded EVK development board can cover part of the scene, but due to the need for welding, with more and more scenes needing on-site support, due to the inability to provide welding conditions, there is a great limitation in actual on-site use, how to make the EVK development board of GNSS module cover production, testing, debugging, use and other links has become an urgent problem to be solved. UTILITY MODEL CONTENT

[0004] (1) technical problem to be solved

[0005] In view of the deficiency of prior art, the utility model aims at providing a probe type GNSS module development board structure, which aims at solving the problem that the existing GNSS module EVK development board is difficult to cover production, testing, debugging, use and other links.

[0006] (2) technical scheme

[0007] In order to solve the above technical problem, the utility model provides a probe type GNSS module development board structure, which comprises a GNSS module, an EVK development board for testing the GNSS module and a solder pad provided on the EVK development board for electrically connecting the GNSS module, the solder pad is divided into two groups, the two groups of solder pads are located on the two sides of the GNSS module respectively, the EVK development board is fixedly connected with a probe electrically connected with the solder pad, the probe comprises a needle, a needle tube and a spring, one end of the needle is slidably connected in the interior of the needle tube, and the spring is located in the interior of the needle tube and is used for elastically contacting the needle with the pin of the GNSS module.

[0008] Preferably, the probe is fixed to the pad by welding.

[0009] Furthermore, the surfaces of the needle and needle tube are gold-plated to ensure the stability and low impedance of the probe.

[0010] Furthermore, the distance between the two groups of pads is greater than the distance between the left and right pins of the GNSS module.

[0011] Furthermore, the end of the needle away from the needle tube is a conical structure, the end of the needle located inside the needle tube is fixedly connected to the limiting block, one end of the spring is fixedly connected to the limiting block, and the other end of the spring is fixedly connected to the inside of the needle tube.

[0012] Furthermore, the number of the pads is 18, and the number of the pads in each group is 9.

[0013] Furthermore, the number of the pads is 24, and the number of the pads in each group is 12. Beneficial effects

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The utility model adopts a GNSS development board made of a test probe. There is no need for soldering during testing. The test can be performed directly by contacting the GNSS module pins with the probe. This not only solves the problems of high cost and large quantity demand, but also has a small size and convenient power supply. It can basically cover all scenarios such as debugging, testing, random inspection, scenes, and firmware upgrades. At the same time, it has a wide range of uses and is easy to use, greatly improving the efficiency of each link. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the pad structure on the EVK development board of the present utility model.

[0017] Figure 2 This is a schematic structural diagram of the welding probe of the utility model.

[0018] Figure 3 This is a schematic diagram of the structure of the utility model using a probe to fix the GNSS module.

[0019] Figure 4 It is a schematic diagram of the cross-sectional structure of the probe of the utility model in contact with the pin of the GNSS module.

[0020] Figure 5 This is a schematic diagram of the fixed structure of the GNSS module of the present invention with a size of 1216.

[0021] The markings in the attached figure are: 1. GNSS module; 2. EVK development board; 3. soldering pad; 4. probe; 5. needle; 6. needle tube; 7. spring; 8. limit block. DETAILED DESCRIPTION

[0022] This specific embodiment is a probe-type GNSS module development board structure, and its structural diagram is as follows Figure 1-Figure 5 As shown, the structure includes a GNSS module 1, an EVK development board 2 for testing the GNSS module 1, and a soldering pad 3 arranged on the EVK development board 2 for electrically connecting the GNSS module 1. The soldering pad 3 is divided into two groups, and the two groups of soldering pads 3 are respectively located on both sides of the GNSS module 1. A probe 4 electrically connected to the soldering pad 3 is fixedly connected to the EVK development board 2. The probe 4 includes a needle 5, a needle tube 6 and a spring 7. One end of the needle 5 is slidably connected to the inside of the needle tube 6. The spring 7 is located inside the needle tube 6 and is used to make the needle 5 elastically contact with the pin of the GNSS module 1.

[0023] The above solution is a comprehensive analysis of the GNSS module 1 on the market. The packaging pins of the GNSS module 1 are all in the form of stamp holes, which provides convenience for the use of the probe 4. At the same time, the probe 4 is composed of three basic components: a needle 5, a needle tube 6 and a spring 7. It is a spring-type device formed by riveting with precision instruments, also known as a spring needle, spring ejector pin, or spring probe. The elastic range can be shortened or extended according to actual needs. The bottom of the needle 5 is usually a bevel structure. The function of the bevel structure is to ensure that the needle keeps in contact with the inner wall of the needle tube when the probe is working.

[0024] A positioning area may be provided between the two groups of pads 3 , and the GNSS module 1 is located within the positioning area after installation and fixation, thereby better fixing the GNSS module 1 .

[0025] like Figure 1 and Figure 2 As shown: In this embodiment, the probe 4 is fixed to the pad 3 by welding. The probe 4 is generally made of copper material, which has good electrical conductivity. The probe 4 and the pad 3 can be fixed by soldering.

[0026] In this embodiment, the surfaces of the needle 5 and the needle tube 6 are gold-plated. In this way, when one side of the GNSS module 1 squeezes the corresponding probe 4, one end of the needle 5 retracts into the needle tube 6 and compresses the spring 7. Since the surfaces of the needle 5 and the needle tube 6 are gold-plated, the current can mainly pass through the gold-plated needle 5 and needle tube 6 to ensure the stability and low impedance of the probe.

[0027] like Figure 2 and Figure 3As shown: In this embodiment, the distance between the two groups of pads 3 is greater than the distance between the left and right pins of the GNSS module 1, so that the length of the probe 4 can be set longer, increasing the elastic range of the needle 5 and better installing the GNSS module 1.

[0028] like Figure 3 and Figure 4 As shown: In this embodiment, the end of the needle 5 away from the needle tube 6 is a conical structure, the end of the needle 5 located inside the needle tube 6 is fixedly connected to the limit block 8, one end of the spring 7 is fixedly connected to the limit block 8, and the other end of the spring 7 is fixedly connected to the inside of the needle tube 6.

[0029] The limiting block 8 is provided to prevent the needle 5 from being separated from the needle tube 6 due to the restoring force of the spring 7 , so that the needle 5 can slide in the needle tube 6 better.

[0030] Through the analysis of GNSS modules 1 on the market, it is found that there are two sizes of modules accounting for more than 95% of all GNSS modules 1, namely 1216 size and 1010 size, and the pin packages of various manufacturers are compatible. Among them, the 1216 size GNSS module 1 has 12 pins on the left and right sides respectively, and the 1010 size GNSS module 1 has 9 pins on the left and right sides respectively. Figure 1-4 As shown: In this embodiment, the number of the pads 3 is 18, and the number of pads 3 in each group is 9.

[0031] In this way, after the corresponding probe 4 is soldered on the pad 3 , the EVK development board 2 can be installed with the 1010 size GNSS module 1 through the probe 4 .

[0032] like Figure 4 and Figure 5 As shown: In this embodiment, the number of pads 3 is 24, and the number of pads 3 in each group is 12. In this way, after the corresponding probes 4 are welded on the pads 3, the EVK development board 2 can install a 1216-size GNSS module 1 through the probes 4.

[0033] Working principle: EVK development board 2 includes PCB board, and then peripheral basic circuits, power control, current test, etc. when using GNSS module 1 are added to the PCB board to form EVK development board 2. Pads 3 electrically connected to peripheral basic circuits, power control, and current test are formed on the PCB board. During assembly, probe 4 is soldered and fixed to pad 3 of PCB board, or probe 4 is fixed to PCB board with glue or screws. Then, the soldered probe 4 can be led out through the trace on PCB board and electrically connected to pad 3. At this time, the probe 4 corresponds to the pin position on GNSS module 1, so that When in use, one only needs to squeeze one side of the GNSS module 1 against the corresponding probe 4. At this time, one end of the needle 5 retracts into the needle tube 6 and compresses the spring 7. Then, one side of the GNSS module 1 is installed on the probe 4. The restoring force of the spring 7 drives the needle 5 to extend and stably contact the pin of the GNSS module 1. In this way, the GNSS module 1 can be stuck in the firmware position of the EVK development board 2 using the elastic range of the probe 4, realizing the feature of using the GNSS module 1 without soldering, and the GNSS module 1 can be taken at will, so that the development board structure can basically cover all aspects of production, testing, debugging, use, etc.

[0034] All technical features in this embodiment can be freely combined according to actual needs.

[0035] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the scope of protection of the present invention.

Claims

1. A probe-type GNSS module development board structure, comprising a GNSS module (1), an EVK development board (2) for testing the GNSS module (1), and a pad (3) provided on the EVK development board (2) for electrically connecting the GNSS module (1), characterized in that: The soldering pads (3) are divided into two groups, and the two groups of soldering pads (3) are respectively located on both sides of the GNSS module (1). A probe (4) electrically connected to the soldering pads (3) is fixedly connected to the EVK development board (2), and the probe (4) includes a needle (5), a needle tube (6) and a spring (7). One end of the needle (5) is slidably connected to the inside of the needle tube (6), and the spring (7) is located inside the needle tube (6) and is used to make the needle (5) elastically contact with the pin of the GNSS module (1).

2. The probe-type GNSS module development board structure according to claim 1, characterized in that: The probe (4) is fixed to the pad (3) by welding.

3. The probe-type GNSS module development board structure according to claim 2, characterized in that: The surfaces of the needle (5) and the needle tube (6) are gold-plated to ensure the stability and low impedance of the probe (4).

4. The probe-type GNSS module development board structure according to claim 3, characterized in that: The distance between the two groups of solder pads (3) is greater than the distance between the pins on the left and right sides of the GNSS module (1).

5. The probe-type GNSS module development board structure according to claim 4, characterized in that: The end of the needle (5) away from the needle tube (6) is a conical structure, the end of the needle (5) located inside the needle tube (6) is fixedly connected to the limit block (8), one end of the spring (7) is fixedly connected to the limit block (8), and the other end of the spring (7) is fixedly connected to the inside of the needle tube (6).

6. The probe-type GNSS module development board structure according to claim 2, characterized in that: The number of the solder pads (3) is 18, and the number of the solder pads (3) in each group is 9.

7. The probe-type GNSS module development board structure according to claim 2, characterized in that: The number of the solder pads (3) is 24, and the number of the solder pads (3) in each group is 12.

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