Resistance measuring device for printed circuit board

Abstract

The utility model provides a printed circuit board resistance measuring device, which relates to the technical field of resistance measuring equipment and comprises an electronic measuring meter, a cable connecting mechanism, a contact connector, an adjusting clamp and a heating mechanism. The contact connector is provided with a contact probe corresponding to the printed circuit board, the adjusting clamp drives the contact connector to move in the direction close to the containing groove, the contact connector can be conveniently in contact connection with test terminals of different lines in the printed circuit board through the adjusting clamp, and the heating mechanism is provided with the containing groove for containing the printed circuit board. The heating mechanism heats and controls the temperature of the printed circuit board in the containing groove, the resistance value of the corresponding circuit of the printed circuit board in the corresponding temperature interval can be measured through the electronic measuring meter, functional modularization is achieved, complexity is reduced, and the problems that in the prior art, manual measurement is tedious in operation, unstable in data, poor in measurement accuracy and the like are solved. And the repeatability is poor.

Description

Technical Field

[0001] The utility model relates to the technical field of resistance measuring equipment, in particular to a resistance measuring device for a printed circuit board. Background Art

[0002] Printed circuit boards, with their small size and high integration, are the main circuit control systems for current electronic appliances. The measurement of TCR (temperature coefficient of resistance) resistance at different temperatures of the circuit board is very important for the circuit design and preparation material evaluation of the printed circuit board, and directly determines the selection of conductive materials for the printed circuit board. How to quickly measure the resistance TCR of the printed circuit board at different temperatures is crucial to the entire circuit design and material application.

[0003] In the prior art, the measurement of circuit boards is generally performed by manually installing cables on a fixture and then using an external instrument to make the installed single-line cable contact the circuit board on the carrier plate. Since the measuring point of the carrier plate is fixed, manual installation and disassembly are required. Therefore, manual resistance TCR testing has the problems of cumbersome operation, unstable data and poor repeatability. Utility Model Content

[0004] The utility model aims to provide a printed circuit board resistance measuring device to alleviate the technical problems existing in the prior art of cumbersome manual measurement operation, unstable data and poor repeatability.

[0005] The utility model provides a printed circuit board resistance measuring device, comprising: an electronic measuring meter, a cable connecting mechanism, a contact connector, an adjusting fixture and a heating mechanism;

[0006] The electronic measuring meter is electrically connected to the contact connector via the cable connection mechanism, the contact connector is connected to the adjustment fixture, and the adjustment fixture can drive the contact connector to move in a three-dimensional space;

[0007] The heating mechanism is provided with a receiving groove for placing a printed circuit board, the heating mechanism is used to heat and control the temperature of the printed circuit board in the receiving groove, the contact connector is provided with a contact probe corresponding to the printed circuit board, and the adjusting fixture is used to drive the contact connector to move in a direction close to the receiving groove so that the contact probe contacts the corresponding test terminal of the printed circuit board, so as to measure the resistance value of the corresponding circuit of the printed circuit board under the temperature control condition through the electronic measuring meter.

[0008] In a preferred embodiment of the present utility model, the cable connection mechanism includes a first cable flex cable, a thread control switch, and a second cable flex cable;

[0009] The electronic measuring meter is connected to the thread control switch via the first cable wiring, and the thread control switch is connected to the contact connector via the second cable wiring. The thread control switch is used to control the connection or interruption between the electronic measuring meter and the contact connector.

[0010] In a preferred embodiment of the utility model, the contact connector further comprises a positioning frame plate;

[0011] The positioning frame plate has a positioning point, the contact probe is inserted into the positioning point, one end of the contact probe is an elastic telescopic structure, and the other end of the contact probe is connected to the second cable arrangement.

[0012] In a preferred embodiment of the present invention, the thread control switch has multiple groups of test circuits, and each group of the test circuits can be installed with a corresponding set of the second cable wiring, so as to arrange the lines through the thread control switch corresponding to different lines of the printed circuit board test terminals.

[0013] In a preferred embodiment of the utility model, the contact probes are provided in multiple groups, and the multiple groups of contact probes are arranged at intervals along the positioning frame plate, and each group of contact probes corresponds to a group of test circuits;

[0014] Each group of the contact probes includes a plurality of the contact probes, and the plurality of the contact probes are arranged corresponding to a plurality of test terminals of a single line on the printed circuit board.

[0015] In a preferred embodiment of the utility model, the adjustment fixture includes a first driving mechanism, a second driving mechanism, a third driving mechanism, a fixed base and a clamping plate;

[0016] One end of the first driving mechanism is connected to the second driving mechanism, the other end of the first driving mechanism is transmission-connected to the fixed base, the second driving mechanism is transmission-connected to the clamping plate, the third driving mechanism is connected to the clamping plate, the clamping plate is connected to the positioning frame plate, and the third driving mechanism is transmission-connected to the positioning frame plate through the clamping plate, the first driving mechanism is used to synchronously drive the positioning frame plate to reciprocate along the first direction through the second driving mechanism and the clamping plate, the second driving mechanism is used to synchronously drive the positioning frame plate to reciprocate along the second direction through the clamping plate, and the third driving mechanism is used to drive the positioning frame plate to reciprocate along the third direction relative to the clamping plate;

[0017] The first direction, the second direction and the third direction are three directions perpendicular to each other in a spatial rectangular coordinate system.

[0018] In a preferred embodiment of the present invention, the first drive mechanism, the second drive mechanism and the third drive mechanism all adopt linear guide displacement mechanisms, and the driving ends of the second drive mechanism and the third drive mechanism all adopt lead screw transmission.

[0019] In a preferred embodiment of the utility model, the heating mechanism includes a heater and a heat storage body;

[0020] The heater is connected to the heat storage body, the receiving groove is arranged on the heat storage body, the printed circuit board is installed on the heat storage body through the receiving groove, the heat storage body is used to conduct the heating temperature of the heater to the printed circuit board, and the heat storage body is used to control the heating temperature of the heater.

[0021] In a preferred embodiment of the utility model, the heating mechanism further comprises a thermometer;

[0022] The thermometer is inserted into the heat storage body, and is used to measure and display the temperature of the heat storage body.

[0023] In a preferred embodiment of the utility model, the heating mechanism further comprises a protective net;

[0024] The protective net cover is arranged on the outside of the heat storage body, and the protective net is used to prevent the side wall of the heat storage body from being exposed.

[0025] The utility model provides a printed circuit board resistance measuring device, comprising: an electronic measuring meter, a cable connection mechanism, a contact connector, an adjusting fixture and a heating mechanism; the electronic measuring meter is electrically connected to the contact connector through the cable connection mechanism, the contact connector is connected to the adjusting fixture, and the adjusting fixture can drive the contact connector to move in a three-dimensional space; the contact connector has a contact probe corresponding to the printed circuit board, the adjusting fixture is used to drive the contact connector to move along a direction close to a receiving groove, and the adjusting fixture can be used to facilitate the contact connector to contact and connect test terminals of different circuits in the printed circuit board; the heating mechanism has a receiving groove for placing the printed circuit board, the heating mechanism is used to heat and control the temperature of the printed circuit board in the receiving groove, and the electronic measuring meter can be used to measure the resistance of the corresponding circuit of the printed circuit board in the corresponding temperature range, thereby realizing functional modularization, reducing cumbersomeness, and alleviating the technical problems of cumbersome manual measurement operation, unstable data, and poor repeatability in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the overall structure of a printed circuit board resistance measuring device provided by an embodiment of the utility model;

[0028] Figure 2 A schematic diagram of a partially enlarged structure of the adjustment fixture position of the printed circuit board resistance measurement device provided by an embodiment of the utility model;

[0029] Figure 3 This is a schematic diagram of a partial enlarged structure at the position of a contact connector of a printed circuit board resistance measuring device provided by an embodiment of the utility model.

[0030] Icons: 100-electronic measuring meter; 200-cable connecting mechanism; 210-first cable arrangement; 220-thread control switch; 230-second cable arrangement; 300-contact connector; 310-contact probe; 320-positioning frame; 400-adjusting fixture; 410-first driving mechanism; 420-second driving mechanism; 430-third driving mechanism; 440-fixed base; 450-clamp; 500-heating mechanism; 510-heater; 520-heat storage body; 521-receiving tank; 530-thermometer. DETAILED DESCRIPTION

[0031] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] like Figure 1-Figure 3As shown, a printed circuit board resistance measuring device provided in this embodiment includes: an electronic measuring meter 100, a cable connecting mechanism 200, a contact connector 300, an adjusting fixture 400 and a heating mechanism 500; the electronic measuring meter 100 is electrically connected to the contact connector 300 through the cable connecting mechanism 200, the contact connector 300 is connected to the adjusting fixture 400, and the adjusting fixture 400 can drive the contact connector 300 to move in a three-dimensional space; the heating mechanism 500 has a receiving groove 521 for placing the printed circuit board, the heating mechanism 500 is used to heat and control the temperature of the printed circuit board in the receiving groove 521, the contact connector 300 has a contact probe 310 corresponding to the printed circuit board, and the adjusting fixture 400 is used to drive the contact connector 300 to move along the direction close to the receiving groove 521, so that the contact probe 310 contacts the test terminal of the printed circuit board correspondingly, so as to measure the resistance of the corresponding circuit of the printed circuit board under the temperature control condition through the electronic measuring meter 100.

[0033] It should be noted that the printed circuit board resistance measuring device provided in this embodiment can measure the resistance of printed circuit boards and thin-film or thick-film electronic paste printed boards, so as to alleviate the cumbersomeness of existing printed circuit board resistance measurement or TCR measurement equipment and reduce equipment costs; specifically, the printed circuit board is placed at a specified position on the upper surface of the heating mechanism 500, and the printed circuit board is clamped and fixed by using the accommodating groove 521. The position of the contact connector 300 is driven by adjusting the clamp 400 so that the contact probe 310 is in close contact with the terminal of the printed circuit board resistance test, and the resistance of one or more circuits at different temperatures is measured by the electronic measuring meter 100, which is simple to operate and efficient and fast.

[0034] The printed circuit board resistance measuring device provided in this embodiment includes: an electronic measuring meter 100, a cable connecting mechanism 200, a contact connector 300, an adjusting fixture 400 and a heating mechanism 500; the electronic measuring meter 100 is electrically connected to the contact connector 300 through the cable connecting mechanism 200, the contact connector 300 is connected to the adjusting fixture 400, and the adjusting fixture 400 can drive the contact connector 300 to move in a three-dimensional space; the contact connector 300 has a contact probe 310 corresponding to the printed circuit board, and the adjusting fixture 400 is used to drive the contact connector 300 to move along the contact probe 310 near the receiving groove 52 1, the adjusting fixture 400 can be used to facilitate the contact connector 300 to contact and connect the test terminals of different circuits in the printed circuit board, the heating mechanism 500 has a receiving groove 521 for placing the printed circuit board, the heating mechanism 500 is used to heat and control the temperature of the printed circuit board in the receiving groove 521, and the electronic measuring meter 100 can be used to measure the resistance value of the corresponding circuit of the printed circuit board in the corresponding temperature range, thereby realizing functional modularization, reducing cumbersomeness, and alleviating the technical problems of cumbersome manual measurement operation, unstable data, and poor repeatability in the prior art.

[0035] Optionally, the electronic measuring meter 100 may be a multimeter, an ohmmeter, or the like.

[0036] On the basis of the above embodiment, further, in a preferred embodiment of the utility model, the cable connection mechanism 200 includes a first cable cable 210, a thread control switch 220 and a second cable cable 230; the electronic measuring meter 100 is connected to the thread control switch 220 through the first cable cable 210, and the thread control switch 220 is connected to the contact connector 300 through the second cable cable 230. The thread control switch 220 is used to control the connection or interruption of the electronic measuring meter 100 and the contact connector 300.

[0037] In this embodiment, the thread control switch 220 can control the release or interruption of the electronic measuring meter 100 and the contact connector 300. The first cable 210 and the second cable 230 can be integrated into a cable through multiple lines. The first cable 210 and the second cable 230 can connect the electrical signal transmission of each functional module and have high and low temperature resistance.

[0038] In a preferred embodiment of the utility model, the contact connector 300 also includes a positioning frame plate 320; the positioning frame plate 320 has a positioning point, the contact probe 310 is inserted into the positioning point, one end of the contact probe 310 is an elastic telescopic structure, and the other end of the contact probe 310 is connected to the second cable 230.

[0039] In this embodiment, the positioning frame plate 320 can be made of insulating high-temperature material, and the insulating material can withstand high and low temperatures of -60°C to 200°C; the positioning frame plate 320 can ensure the installation and fixation of the contact probe 310, and the contact probe 310 is inserted into the positioning point of the positioning frame plate 320. The positioning point can be arranged accordingly according to the test terminal of the printed circuit board. The contact probe 310 can be a metal probe, which can be a spring probe or a spring sheet structure, which can provide a recoverable rebound stroke and deformation, and has low resistance and high conductivity.

[0040] In a preferred embodiment of the present invention, the thread control switch 220 has multiple test circuits, each test circuit can be installed with a corresponding set of second cable flexures 230 to arrange the lines through the thread control switch 220 corresponding to different lines of the printed circuit board test terminals.

[0041] Optionally, the thread control switch 220 can integrate any number of test circuits, and the thread control switch 220 can be used to correspondingly open different combinations of test circuits to measure different lines of the printed circuit board test terminals. The thread control switch 220 can integrate a 16-bit thread switch.

[0042] In a preferred embodiment of the utility model, multiple groups of contact probes 310 are provided, and the multiple groups of contact probes 310 are arranged at intervals along the positioning frame plate 320, and each group of contact probes 310 corresponds to a group of test circuits; each group of contact probes 310 includes multiple contact probes 310, and the multiple contact probes 310 are arranged corresponding to multiple test terminals of a single circuit on the printed circuit board.

[0043] Optionally, the number of contact probes 310 can be greater than the multiple test terminals of a single circuit on the printed circuit board. When the position of the corresponding printed circuit board is determined, the free combination of the second cable arrangement 230 is controlled to correspond to the position of the test terminal in the printed circuit board; or, a plurality of positioning points can be set on the positioning frame plate 320, and different combinations of contact probes 310 can be detachably connected to the positioning points to ensure that the second cable arrangement 230 corresponds to the position of the test terminal in the printed circuit board.

[0044] In a preferred embodiment of the utility model, the adjustment fixture 400 includes a first drive mechanism 410, a second drive mechanism 420, a third drive mechanism 430, a fixed base 440 and a clamping plate 450; one end of the first drive mechanism 410 is connected to the second drive mechanism 420, the other end of the first drive mechanism 410 is transmission-connected to the fixed base 440, the second drive mechanism 420 is transmission-connected to the clamping plate 450, the third drive mechanism 430 is connected to the clamping plate 450, the clamping plate 450 is connected to the positioning frame plate 320, and the third drive mechanism 430 is connected to the clamping plate 450 through The clamping plate 450 is transmission-connected to the positioning frame plate 320, the first driving mechanism 410 is used to synchronously drive the positioning frame plate 320 to reciprocate along the first direction through the second driving mechanism 420 and the clamping plate 450, the second driving mechanism 420 is used to synchronously drive the positioning frame plate 320 to reciprocate along the second direction through the clamping plate 450, and the third driving mechanism 430 is used to drive the positioning frame plate 320 to reciprocate along the third direction relative to the clamping plate 450; wherein the first direction, the second direction and the third direction are three directions perpendicular to each other in a spatial rectangular coordinate system.

[0045] In this embodiment, the adjustment fixture 400 can be used to fix the contact connector 300, and the first drive mechanism 410, the second drive mechanism 420 and the third drive mechanism 430 can be adjusted in the up-down, left-right, and front-back directions, respectively, so that the contact connector 300 can be moved in a three-dimensional direction; specifically, the three-dimensional direction of the printed circuit board is specifically described, and the fixed base 440 has a fixed rod, which is connected to the first drive mechanism 410. The first drive mechanism 410 can be connected to the second drive mechanism 420 through a transmission rod, and the first drive mechanism 410 can drive the second drive mechanism The second driving mechanism 420 moves in the front-to-back direction, the second driving mechanism 420 is transmission-connected with the clamping plate 450, the second driving mechanism 420 drives the clamping plate 450 to move up and down in the vertical direction, the third driving mechanism 430 is installed on the clamping plate 450, and the third driving mechanism 430 is transmission-connected with the positioning frame plate 320, the third driving mechanism 430 drives the positioning frame plate 320 to move in the left-right direction, and the movement modes of the first driving mechanism 410, the second driving mechanism 420 and the third driving mechanism 430 are controlled respectively, so that the movement of the positioning frame plate 320 in three-dimensional space is realized.

[0046] In a preferred embodiment of the present invention, the first drive mechanism 410, the second drive mechanism 420 and the third drive mechanism 430 all adopt linear guide displacement mechanisms, and the driving ends of the second drive mechanism 420 and the third drive mechanism 430 all adopt lead screw transmission.

[0047] Optionally, the first drive mechanism 410 can use a linear motor, which is connected to the second drive mechanism 420 through a transmission rod, and the second drive mechanism 420 and the third drive mechanism 430 can both use a lead screw drive, wherein the second drive mechanism 420 has a fixed frame, which is respectively connected to the transmission rod and the clamping plate 450, and the lead screw is connected to the fixed frame in a transmission manner, and the fixed frame drives the clamping plate 450 to move by the rotation of the lead screw; similarly, the clamping plate 450 is slidably connected to the positioning frame, and the lead screw is connected to the positioning frame in a transmission manner through the clamping plate 450, and the positioning frame is driven to move by the lead screw. It should be noted that the linear guide displacement mechanism used by the first drive mechanism 410, the second drive mechanism 420 and the third drive mechanism 430 can be applied according to the existing structure, and the specific method is not limited here.

[0048] In a preferred embodiment of the utility model, the heating mechanism 500 includes a heater 510 and a heat storage body 520; the heater 510 is connected to the heat storage body 520, the receiving groove 521 is arranged on the heat storage body 520, the printed circuit board is installed on the heat storage body 520 through the receiving groove 521, the heat storage body 520 is used to conduct the heating temperature of the heater 510 to the printed circuit board, and the heat storage body 520 is used to control the heating temperature of the heater 510.

[0049] In this embodiment, the heater 510 can be an electric heater 510, and the heat storage body 520 can be made of a metal material with good thermal conductivity, preferably a copper column made of pure copper. The heat storage body 520 has thermal conductivity and heat preservation functions. The heater 510 can be set below the heat storage body 520. The heater 510 can heat the heat storage body 520. When the heat storage body 520 reaches a preset temperature, the heat preservation function of the heat storage body 520 is used to ensure that the temperature of the printed circuit board is maintained during the measurement process.

[0050] In a preferred embodiment of the present invention, the heating mechanism 500 further includes a thermometer 530 ; the thermometer 530 is inserted into the heat storage body 520 , and the thermometer 530 is used to measure and display the temperature of the heat storage body 520 .

[0051] Optionally, the thermometer 530 can be directly inserted into the interior of the heat storage body 520. The thermometer 530 can directly display the temperature value of the heat storage body 520 after the heater 510 heats the heat storage body 520, so as to ensure that the operator can turn on the thread control switch 220 at the corresponding temperature in time to achieve the resistance value of the specified circuit of the printed circuit board at this temperature.

[0052] In a preferred embodiment of the present invention, the heating mechanism 500 further includes a protective net; the protective net cover is arranged outside the heat storage body 520, and the protective net is used to prevent the side wall of the heat storage body 520 from being exposed.

[0053] Optionally, since the heat storage body 520 is exposed to the external environment, in order to prevent the heat storage body 520 from scalding the operator, a protective net is provided on the outside of the heat storage body 520, and a barrier layer is formed on the outside of the heat storage body 520 by using the protective net. At the same time, since the accommodating groove 521 is provided at the top of the heat storage body 520, the height of the protective net needs to be less than or equal to the height of the heat storage body 520.

[0054] During the specific working process of this embodiment, the printed circuit board to be tested is placed in the receiving groove 521 on the heat storage body 520, and the adjusting fixture 400 drives the contact connector 300 to move, so that the contact probe 310 of the contact connector 300 is in close contact with the corresponding test terminal of the printed circuit board; the heater 510 is turned on to heat and temperature-control the heat storage body 520, and when the thermometer 530 reaches the set temperature range, the thread control switch 220 is turned on, and the resistance value of the designated circuit of the printed circuit board is directly measured by the electronic measuring meter 100.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A printed circuit board resistance measuring device, characterized in that: include: An electronic measuring meter (100), a cable connection mechanism (200), a contact connector (300), an adjustment fixture (400) and a heating mechanism (500); The electronic measuring meter (100) is electrically connected to the contact connector (300) via the cable connection mechanism (200); the contact connector (300) is connected to the adjustment fixture (400); and the adjustment fixture (400) can drive the contact connector (300) to move in a three-dimensional space; The heating mechanism (500) is provided with a receiving groove (521) for placing a printed circuit board, and the heating mechanism (500) is used to heat and control the temperature of the printed circuit board in the receiving groove (521). The contact connector (300) is provided with a contact probe (310) corresponding to the printed circuit board, and the adjustment fixture (400) is used to drive the contact connector (300) to move in a direction close to the receiving groove (521) so that the contact probe (310) contacts the test terminal of the printed circuit board correspondingly, so as to measure the resistance value of the corresponding circuit of the printed circuit board under the temperature control condition through the electronic measuring meter (100).

2. The printed circuit board resistance measuring device according to claim 1, characterized in that: The cable connection mechanism (200) comprises a first cable arrangement (210), a thread control switch (220) and a second cable arrangement (230); The electronic measuring meter (100) is connected to the thread control switch (220) via the first cable wiring (210), the thread control switch (220) is connected to the contact connector (300) via the second cable wiring (230), and the thread control switch (220) is used to control the connection or interruption between the electronic measuring meter (100) and the contact connector (300).

3. The printed circuit board resistance measuring device according to claim 2, characterized in that: The contact connector (300) further comprises a positioning frame plate (320); The positioning frame plate (320) has a positioning point, the contact probe (310) is inserted into the positioning point, one end of the contact probe (310) is an elastic telescopic structure, and the other end of the contact probe (310) is connected to the second cable arrangement (230).

4. The printed circuit board resistance measuring device according to claim 3, characterized in that: The thread control switch (220) has a plurality of test circuits, and each test circuit can be installed with a corresponding set of the second cable arrangement (230) so as to arrange different lines corresponding to the printed circuit board test terminals through the thread control switch (220).

5. The printed circuit board resistance measuring device according to claim 4, characterized in that: The contact probes (310) are provided in multiple groups, and the multiple groups of contact probes (310) are arranged at intervals along the positioning frame plate (320), and each group of contact probes (310) corresponds to a group of test circuits; Each group of the contact probes (310) comprises a plurality of the contact probes (310), and the plurality of the contact probes (310) are arranged corresponding to a plurality of test terminals of a single circuit on the printed circuit board.

6. The printed circuit board resistance measuring device according to claim 3, characterized in that: The adjusting fixture (400) comprises a first driving mechanism (410), a second driving mechanism (420), a third driving mechanism (430), a fixed base (440) and a clamping plate (450); One end of the first driving mechanism (410) is connected to the second driving mechanism (420), the other end of the first driving mechanism (410) is transmission-connected to the fixed base (440), the second driving mechanism (420) is transmission-connected to the clamping plate (450), the third driving mechanism (430) is connected to the clamping plate (450), the clamping plate (450) is connected to the positioning frame plate (320), and the third driving mechanism (430) is connected to the positioning frame plate (320) via the clamping plate (450). The first driving mechanism (410) is used for synchronously driving the positioning frame plate (320) to reciprocate along the first direction through the second driving mechanism (420) and the clamping plate (450), the second driving mechanism (420) is used for synchronously driving the positioning frame plate (320) to reciprocate along the second direction through the clamping plate (450), and the third driving mechanism (430) is used for driving the positioning frame plate (320) to reciprocate along the third direction relative to the clamping plate (450); The first direction, the second direction and the third direction are three directions perpendicular to each other in a spatial rectangular coordinate system.

7. The printed circuit board resistance measuring device according to claim 6, characterized in that: The first drive mechanism (410), the second drive mechanism (420) and the third drive mechanism (430) all adopt linear guide displacement mechanisms, and the driving ends of the second drive mechanism (420) and the third drive mechanism (430) all adopt lead screw transmission.

8. The printed circuit board resistance measuring device according to any one of claims 1 to 7, characterized in that: The heating mechanism (500) comprises a heater (510) and a heat storage body (520); The heater (510) is connected to the heat storage body (520); the receiving groove (521) is arranged on the heat storage body (520); the printed circuit board is installed on the heat storage body (520) through the receiving groove (521); the heat storage body (520) is used to conduct the heating temperature of the heater (510) to the printed circuit board, and the heat storage body (520) is used to control the heating temperature of the heater (510).

9. The printed circuit board resistance measuring device according to claim 8, characterized in that: The heating mechanism (500) further includes a thermometer (530); The thermometer (530) is inserted into the heat storage body (520), and the thermometer (530) is used to measure and display the temperature of the heat storage body (520).

10. The printed circuit board resistance measuring device according to claim 8, characterized in that: The heating mechanism (500) also includes a protective net; The protective net cover is arranged outside the heat storage body (520), and the protective net is used to prevent the side wall of the heat storage body (520) from being exposed.

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