FCT tool for detecting variable frequency drive board

Abstract

The utility model belongs to the technical field of FCT tools, and discloses an FCT tool for detecting a variable frequency drive board, an external detection circuit and an MCU controller are installed in a tool body, and the external detection circuit is connected with the MCU controller through a connecting line; the upper side of the tool body is provided with a detection board used for cooperating with a to-be-detected product. The detection board is connected with an external detection circuit and the MCU controller through a connecting line. On the basis of an original circuit, external detection is added, two kinds of data of the internal self-checking circuit and the external detection circuit are compared, dual detection can be achieved, and when error data are detected, whether the fault of the internal self-checking circuit or the fault of the circuit needing to be detected can be judged. According to the utility model, data abnormity caused by an internal self-checking circuit can be eliminated, an abnormal circuit can be conveniently positioned, and the device is suitable for various different types of products with different sizes and types.

Description

Technical Field

[0001] The utility model belongs to the technical field of FCT tooling, and in particular relates to an FCT tooling for detecting a variable frequency drive board. Background Art

[0002] The full name of FCT is Functional Circuit Test. FCT test refers to the test method that provides a simulated operating environment (stimulus and load) to the test target board (UUT: Unit Under Test) to make it work in various design states, thereby obtaining the parameters of each state to verify the function of UUT. In short, it is to load the UUT with appropriate stimulus and measure whether the output response meets the requirements.

[0003] Existing product testing can generally only enter the self-test mode through the FCT tooling, use the self-test circuit inside the board to be tested to self-test and read the data and upload it to the host computer. For example, in the patent application with patent application number CN201610589841.X, an automatic testing method for the FCT detection tooling of a household air-conditioning control board is disclosed, which mainly includes: power supply voltage test, temperature sensor test, stepper motor test, and internal fan test; this scheme can automatically test the power supply voltage, temperature sensor, stepper motor, and internal fan of the air-conditioning control board, and send the test data to the host computer, and the host computer software determines whether each test item is qualified, and can automatically collect and save the test data in the host computer. However, this detection method is error-prone. When a self-test circuit fails, the detection data will be wrong, so it cannot be ruled out that the internal self-test circuit of the board to be tested is faulty or the circuit of the tested part is faulty.

[0004] Through the above analysis, the problems and defects of the existing technology are: when a self-test circuit of the existing FCT detection tool fails, the detection data will be wrong, and it is impossible to rule out the failure of the internal self-test circuit of the board under test or the failure of the circuit of the tested part, which is easy to lead to misjudgment. Utility Model Content

[0005] In order to overcome the problems existing in the related art, the disclosed embodiment of the utility model provides a FCT tooling for detecting a variable frequency drive board.

[0006] The technical solution of the utility model is as follows: an FCT tool for detecting a variable frequency drive board is provided with a tool body; an external detection circuit and an MCU controller are installed inside the tool body, and the external detection circuit is connected to the MCU controller through a connecting line;

[0007] A detection board for cooperating with the product to be tested is arranged on the upper side of the tool body, and the inner side of the detection board is connected to the external detection circuit and the MCU controller through an isolation circuit;

[0008] A data communicator is installed inside the tool body, and the data communicator is connected to the host computer through wireless signals and an isolated communication circuit.

[0009] In one embodiment, a power switch and a dual start button are embedded on the outer side of the tool body, and the power switch and the dual start button are respectively connected to the MCU controller through connecting lines.

[0010] In one embodiment, an emergency stop switch is embedded on the outside of the tooling body, the emergency stop switch is located in the middle of the double start buttons, and the emergency stop switch is connected to the MCU controller through a connecting line.

[0011] In one embodiment, a lifting cylinder is fixed to the upper end of the tooling body, the output end of the lifting cylinder is connected to a lifting platform, a pressing cylinder is fixed in the middle of the lifting platform, and the detection plate is fixed to the output end of the pressing cylinder.

[0012] In one embodiment, a placement groove matching the product to be tested is fixed on the upper surface of the tooling body.

[0013] In combination with all the above-mentioned technical solutions, the beneficial effects of the utility model are as follows: on the basis of the original circuit, the utility model adds external detection, compares the two data of the internal self-detection circuit and the external detection circuit, and can realize double detection. When erroneous data is detected, it can be determined whether it is a fault of the internal self-detection circuit or a fault of the circuit part to be detected. At the same time, since the external detection circuit is isolated by design, it will not affect the circuit being tested.

[0014] The utility model can eliminate data anomalies caused by internal self-checking circuits, facilitates locating abnormal circuits, and is suitable for a variety of different product sizes and types.

[0015] The utility model can control the power supply of the whole device through the power switch, and can ensure the operation safety while realizing detection control through the double start buttons; by setting the emergency stop switch, the operation of the whole device can be stopped urgently when an abnormal state occurs.

[0016] The utility model fixes a lifting cylinder and a pressing cylinder on the upper end of the tool body, which can facilitate the lifting of the detection board and realize automatic control of the circuit connection and disconnection with the circuit board to be tested; and the position of the product to be tested can be fixed by placing the groove.

[0017] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0019] Figure 1 It is a structural schematic diagram of the FCT tooling for detecting the variable frequency drive board provided by the embodiment of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the FCT tooling for detecting the variable frequency drive board provided by the embodiment of the utility model;

[0021] In the figure: 1. Tool body; 2. Detection board; 3. Power switch; 4. Double start button; 5. Emergency stop switch; 6. Lifting cylinder; 7. Lifting platform; 8. Pressing cylinder; 9. Placement slot. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific implementation disclosed below.

[0023] like Figure 1 and Figure 2 As shown, the tool body 1 in the FCT tool for detecting the variable frequency drive board provided by the embodiment of the utility model is internally installed with an external detection circuit and an MCU controller, and the external detection circuit is connected to the MCU controller through a connecting line

[0024] A detection board 2 for cooperating with the product to be tested is arranged on the upper side of the tool body 1, and the inner side of the detection board 2 is connected to the external detection circuit and the MCU controller through an isolation circuit;

[0025] A data communicator is installed inside the tool body 1, and the data communicator is connected to the host computer through wireless signals and an isolated communication circuit.

[0026] A power switch 3 and a dual-start button 4 are embedded on the outer side of the tool body 1 in the embodiment of the utility model. The power switch 3 and the dual-start button 4 are connected to the MCU controller through connecting lines respectively.

[0027] An emergency stop switch 5 is embedded on the outer side of the tool body 1 in the embodiment of the utility model. The emergency stop switch 5 is located in the middle of the double start buttons 4. The emergency stop switch 5 is connected to the MCU controller through a connecting line.

[0028] A lifting cylinder 6 is fixed on the upper end of the tooling body 1 in the embodiment of the utility model, and the output end of the lifting cylinder 6 is connected to a lifting platform 7. A pressing cylinder 8 is fixed in the middle of the lifting platform 7, and the detection plate 2 is fixed on the output end of the pressing cylinder 8.

[0029] A placement groove 9 matching the product to be tested is fixed on the upper surface of the tool body 1 in the embodiment of the utility model.

[0030] The external detection circuit in the embodiment of the utility model includes a detection circuit with the same structure as the self-detection circuit inside the product to be tested. The self-detection circuit and the external detection circuit can be set up with many different types at the same time, and can be configured and selected according to the specific detection needs of the product to be tested, without limiting the specific circuit form of the detection circuit.

[0031] The external detection circuit and the self-detection circuit can detect the following parts at the same time:

[0032] (1) Communication circuits;

[0033] (2) Compressor part;

[0034] (3) PFC part;

[0035] (4) DC fan part;

[0036] (5) Sensor part;

[0037] (6) DC and AC voltage of the whole machine;

[0038] (7) Relay, electronic expansion valve;

[0039] (8) Detect VDC voltage;

[0040] (9) Detect VAC voltage.

[0041] The working principle of the utility model is as follows: when the FCT tooling for detecting the variable frequency drive board provided by the utility model is used, the product to be tested is first placed in the placement slot 9 of the tooling body 1, and the product to be tested is connected to the corresponding simulated compressor, fan and other loads. After power is turned on, the "self-test circuit" inside the product to be tested will generate "test data 1" after detection, and transmit it to the MCU controller inside the tooling body 1. The MCU controller inside the tooling body 1 issues a detection instruction, and the downward pressure cylinder 8 drives the detection board 2 to press down, so that the contact of the detection board 2 is in contact with the contact of the product to be tested in the placement slot 9. The external detection circuit inside the detection board 2 detects the "circuit to be tested" of the product to be tested and generates "test data 2". The MCU controller compares the "test data 1" and "test data 2" with the set threshold value, and outputs the result to the host computer. The host computer highlights the inconsistent data in red. At this time, not only can the performance test of the product be realized, but also when abnormal data is detected, the specific circuit part can be located. At the same time, the isolation design of the external inspection circuit not only ensures the reliability of the FCT tooling detection, but also makes it easier to locate the abnormal circuit position, which is convenient for subsequent maintenance. When testing different products to be tested, the lifting cylinder 6 drives the lifting platform 7 to move upward as a whole, providing more space for the lower end of the downward pressure cylinder 8, and the detection board 2 is disassembled and replaced with a detection board 2 with a built-in detection circuit suitable for different products to be tested.

[0042] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0043] The above description is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited thereto. Any modification, equivalent substitution and improvement made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention shall be covered by the protection scope of the present invention.

Claims

1. A FCT tool for detecting a variable frequency drive board, comprising a tool body (1), characterized in that: An external detection circuit and an MCU controller are installed inside the tool body (1), and the external detection circuit is connected to the MCU controller via a connecting line; A detection board (2) for cooperating with the product to be tested is arranged on the upper side of the tool body (1); the inner side of the detection board (2) is connected to the external detection circuit and the MCU controller via an isolation circuit; A data communicator is installed on the inner side of the tool body (1), and the data communicator is connected to the host computer through wireless signals and an isolated communication circuit.

2. The FCT tooling for detecting the variable frequency drive board according to claim 1 is characterized in that: A power switch (3) and a dual start button (4) are embedded on the outside of the tool body (1); the power switch (3) and the dual start button (4) are respectively connected to the MCU controller via connecting lines.

3. The FCT tooling for detecting the variable frequency drive board according to claim 1 is characterized in that: An emergency stop switch (5) is embedded on the outside of the tool body (1), the emergency stop switch (5) is located in the middle of the double start buttons (4), and the emergency stop switch (5) is connected to the MCU controller via a connecting line.

4. The FCT tooling for detecting the variable frequency drive board according to claim 1 is characterized in that: A lifting cylinder (6) is fixed at the upper end of the tooling body (1); the output end of the lifting cylinder (6) is connected to a lifting platform (7); a pressing cylinder (8) is fixed in the middle of the lifting platform (7); and the detection plate (2) is fixed to the output end of the pressing cylinder (8).

5. The FCT tooling for detecting the variable frequency drive board according to claim 4 is characterized in that: A placement groove (9) matching the product to be tested is fixed on the upper surface of the tool body (1).

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