Magnetic steel detection device

Abstract

The utility model discloses a magnetic steel detection device, which comprises a shell, four adjusting plates, four magnetic sensitive switches, three indicating lamps and a pair of power supply input ports, wherein a sliding groove is formed in the shell; the four adjusting plates are symmetrically arranged on the two sides of the sliding groove and detachably connected with the shell, and the positions of the adjusting plates in the shell are adjustable. Each magnetic sensitive switch is detachably connected with one adjusting plate; the three indicating lamps are arranged on the shell; the pair of power input ports is electrically connected with the magnetic sensitive switch and the indicating lamp. The magnetic field intensity detection device solves the problems that the detection efficiency is low and the product quality is difficult to comprehensively control due to the discreteness of the magnetic field intensity in the existing magnetic steel detection, realizes the rapid, efficient and accurate detection of the magnetic field intensity of the magnetic steel, and meets the quality detection requirements of large-scale production.

Description

Technical Field

[0001] This utility model relates to the field of magnetic steel detection technology, and in particular to a magnetic steel detection device. Background Technology

[0002] Electrical signal control units composed of magnetic switches and rare-earth magnets are widely used in many fields such as home appliances and medical devices due to their advantages of small size, low cost, and reliable quality. However, rare-earth permanent magnets have the problem of large magnetic field strength errors, which are typically between 5% and 15%, and can even reach 20%. This error seriously affects the sensitivity of the control unit. Taking the foot switch of a medical device as an example, in order to ensure its normal operation, the switching sensitivity must be controlled within a very small distance range. Correspondingly, the magnetic field strength error of the rare-earth magnet must be strictly controlled within 10%.

[0003] Currently, the magnetic field strength of magnets is typically tested using a gaussmeter (also known as a gaussmeter) for random sampling. However, the magnetic field strength of a batch of magnets varies considerably, making it difficult to control individual magnets with a variation exceeding 10%, thus failing to meet product quality requirements. While using a gaussmeter for full inspection of the magnets ensures accuracy, it is extremely inefficient, consuming significant time and labor costs, making it unsuitable for the quality inspection needs of large-scale production. Therefore, there is an urgent need for a testing device that can efficiently and accurately detect the magnetic field strength of magnets and overcome the problem of magnetic field strength variation. Summary of the Invention

[0004] According to an embodiment of the present invention, a magnetic steel detection device is provided, comprising:

[0005] The housing has a sliding groove.

[0006] Four adjusting plates are symmetrically arranged on both sides of the slide groove and are detachably connected to the housing. The position of the adjusting plates inside the housing is adjustable.

[0007] Four magnetic switches, each detachably connected to an adjustment plate;

[0008] Three indicator lights are mounted on the housing.

[0009] A pair of power input ports are electrically connected to the magnetic switch and the indicator light, respectively.

[0010] Furthermore, the three indicator lights are divided into: the first indicator light, the second indicator light, and the third indicator light, which are connected in parallel and electrically connected to the power input port.

[0011] Furthermore, the first indicator light is blue, the second indicator light is green, and the third indicator light is red.

[0012] Furthermore, the four magnetic switches are divided into: the first magnetic switch, the second magnetic switch, the third magnetic switch, and the fourth magnetic switch;

[0013] The first magnetic switch and the second magnetic switch are respectively installed on both sides of the slide groove;

[0014] The third and fourth magnetic switches are respectively installed on both sides of the slide groove;

[0015] The first magnetic switch and the third magnetic switch are connected in parallel and then connected in series with the second indicator light.

[0016] The second and fourth magnetic switches are connected in parallel and then connected in series with the third indicator light.

[0017] Furthermore, the housing is also equipped with a storage slot, which is connected to the slide.

[0018] Furthermore, it also includes: toothpicks, which are used to move the magnet within the groove.

[0019] Furthermore, the adjustment plate is provided with elongated holes, through which screws are passed to connect the adjustment plate to the housing.

[0020] Furthermore, the interior of the housing is hollow, and the adjustment plate and magnetic switch are located inside the housing.

[0021] The beneficial effects of this utility model are:

[0022] 1. High-efficiency testing: The design of this device enables rapid testing of magnets. Compared with the traditional gaussmeter full inspection method, it greatly improves the testing efficiency, effectively meets the testing needs of large-scale production, and saves a lot of time and labor costs.

[0023] 2. Precise Judgment: By utilizing the linkage design of magnetic switches and indicator lights, the on / off status of the green indicator light (second indicator light) and the red indicator light (third indicator light) can be used to intuitively and accurately determine whether the magnetic field strength of the magnet is within the specified tolerance range. This allows for the timely detection of magnets with excessive magnetic field strength, precise control of product quality, and overcomes the difficulty of detecting individual unqualified magnets using traditional sampling inspection methods.

[0024] 3. Flexible and versatile: The adjustable plate design allows the device to adapt to the detection requirements of various magnetic field strengths.

[0025] 4. Easy to operate: The device has a simple structure and is easy to operate. With the intuitive display of indicator lights, operators can quickly get started without complicated training. In addition, the movement of the magnet can be flexibly controlled with the help of toothpicks during the testing process, which further improves the ease of operation.

[0026] It should be understood that both the foregoing general description and the following detailed description are exemplary and intended to provide further illustration of the claimed technology. Attached Figure Description

[0027] Figure 1 This is a perspective view schematic diagram according to an embodiment of the present utility model;

[0028] Figure 2 for Figure 1 Top view;

[0029] Figure 3 for Figure 2 Sectional view along axis AA;

[0030] Figure 4 for Figure 2 BB-direction sectional view;

[0031] Figure 5 This is a schematic diagram of the internal structure according to an embodiment of the present utility model;

[0032] Figure 6 This is a simplified circuit diagram according to an embodiment of the present utility model. Detailed Implementation

[0033] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, further illustrating the present invention.

[0034] First, combine Figures 1-6 The magnetic steel detection device according to the embodiments of the present utility model is used for magnetic steel detection and has a wide range of applications.

[0035] like Figures 1-6 As shown, the magnet detection device of this utility model embodiment includes:

[0036] Housing 1, with a sliding groove 11 provided on housing 1;

[0037] Four adjusting plates 2 are symmetrically arranged on both sides of the slide groove 11 and are detachably connected to the housing 1. The position of the adjusting plates 2 inside the housing 1 is adjustable.

[0038] Four magnetic switches, each detachably connected to an adjustment plate 2;

[0039] Three indicator lights are mounted on housing 1.

[0040] A pair of power input ports 3 are electrically connected to the magnetic switch and the indicator light, respectively.

[0041] Furthermore, such as Figures 1-2As shown, in this embodiment, the three indicator lights are: the first indicator light L1, the second indicator light L2 and the third indicator light L3, which are connected in parallel and electrically connected to the power input port 3.

[0042] Furthermore, such as Figures 1-2 As shown, in this embodiment, the first indicator light L1 is blue, the second indicator light L2 is green, and the third indicator light L3 is red. Different colored indicator lights correspond to different detection states, providing intuitive feedback to the operator on the detection results of the magnet 4, facilitating quick judgment of whether the magnet 4 meets quality requirements. The first indicator light L1 indicates whether power is on, the second indicator light L2 indicates whether the magnetic field strength of the magnet 4 is greater than the lower limit, and the third indicator light L3 indicates whether the magnetic field strength of the magnet 4 is greater than the upper limit.

[0043] Furthermore, such as Figure 5 As shown, in this embodiment, the four magnetic switches are: first magnetic switch K1, second magnetic switch K2, third magnetic switch K3 and fourth magnetic switch K4;

[0044] The first magnetic switch K1 and the second magnetic switch K2 are respectively disposed on both sides of the slide groove 11;

[0045] The third magnetic switch K3 and the fourth magnetic switch K4 are respectively installed on both sides of the slide groove 11;

[0046] The first magnetic switch K1 and the third magnetic switch K3 are connected in parallel and then connected in series with the second indicator light L2;

[0047] The second magnetic switch K2 and the fourth magnetic switch K4 are connected in parallel and then connected in series with the third indicator light L3.

[0048] The magnetic switch can sensitively detect changes in the magnetic field of the magnet 4 and convert the magnetic field signal into an electrical signal, providing a key basis for judging the detection results.

[0049] Furthermore, such as Figures 1-2 As shown, in this embodiment, the housing 1 is also provided with a storage slot 12, which is connected to the slide 11 and is used to temporarily place the qualified magnets 4, making the testing operation more convenient and orderly.

[0050] Furthermore, such as Figures 1-3 As shown, in this embodiment, it also includes: toothpick 5, which is used to move magnet 4 within slide groove 11.

[0051] Furthermore, such as Figure 5As shown, in this embodiment, the adjustment plate 2 is provided with an elongated hole 21. The adjustment plate 2 is connected to the housing 1 by using a screw 6 through the elongated hole 21. By changing the position of the elongated hole 21 and the screw 6, the position of the adjustment plate 2 can be precisely adjusted to adapt to the detection requirements of magnets 4 of different specifications, which greatly improves the versatility of the detection device.

[0052] Furthermore, such as Figures 3-4 As shown in Figure 5, in this embodiment, the interior of the housing 1 is hollow and is divided into an upper cover and a bottom cover, which are detachably connected. The adjustment plate 2 and the magnetic switch are located inside the housing 1 and connected to the bottom cover. The indicator light and the power input port 3 are located on the upper cover.

[0053] Working principle:

[0054] Since the magnetic field strengths of the two end faces of a magnet 4, namely the N pole and the S pole, are quite different, in order to ensure that the N pole and the S pole of the magnet 4 are within the set strength tolerance range, the first magnetic switch K1 and the second magnetic switch K2 are placed on the left and right sides of the slide groove 11, one near and one far, respectively, while the third magnetic switch K3 and the fourth magnetic switch K4 are placed on the left and right sides of the slide groove 11, one far and one near.

[0055] First, open housing 1 and adjust the position of the magnetic switch:

[0056] Then, supply 12V power to power input port 3. Assuming the required magnetic field strength of magnet 4 is (3000±300) Gs, first use a gaussmeter to select three or more magnets 4 with a strength of (2700±10) Gs as lower limit samples. Place them in the slide 11 and adjust the distance between the first magnetic switch K1 and the third magnetic switch K3 from beginning to end, from far to near, until the second indicator light L2 is just lit and fixed. Similarly, use a gaussmeter to select three or more magnets 4 with a strength of (3300±10) Gs as upper limit samples, and adjust the distance between the second magnetic switch K2 and the fourth magnetic switch K4 from near to far, until the third indicator light L3 is just turned off and fixed. After adjustment, install the housing 1, and the modified testing fixture is complete.

[0057] Then, the detection operation is performed:

[0058] 1. Take magnet 4 from the batch of magnets to be tested and place it in the groove 11 of the housing 1.

[0059] 2. Gently move the magnet 4 using the toothpick 5 in the storage slot 12, allowing it to slide smoothly from the head to the tail of the slide groove 11. During the sliding process of the magnet 4, the magnetic switch senses the changes in the magnetic field of the magnet 4 in real time and converts the magnetic field signal into an electrical signal.

[0060] Interpretation of test results:

[0061] If the second indicator light L2 (green) lights up during the sliding process of magnet 4, and the third indicator light L3 (red) does not light up at all, it indicates that the magnetic field strength of magnet 4 is greater than the lower limit (e.g., 2700Gs) and less than the upper limit (e.g., 3300Gs), that is, the magnetic field strength of magnet 4 is within the required tolerance range, and magnet 4 is deemed qualified.

[0062] If the second indicator light L2 (green) does not light up at all, it means that the magnetic field strength of magnet 4 is less than the required lower limit (e.g., less than 2700Gs). The magnetic strength of magnet 4 is too weak and it is judged as unqualified.

[0063] If the third indicator light L3 (red) lights up during the sliding process of magnet 4, it indicates that the magnetic field strength of magnet 4 is greater than the upper limit (e.g., greater than 3300Gs). Magnet 4 is too strong and is therefore deemed unqualified.

[0064] Above, refer to Figures 1-6 The present invention describes a magnetic steel testing device according to an embodiment of the present invention, which solves the problems of low testing efficiency and difficulty in comprehensively controlling product quality caused by the dispersion of magnetic field strength in existing magnetic steel testing. It realizes rapid, efficient and accurate testing of magnetic field strength of magnetic steel, and meets the quality testing needs of large-scale production.

[0065] It should be noted that, in this specification, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes that element.

[0066] Although the present invention has been described in detail through the above preferred embodiments, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above content. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A magnetic steel detection device, characterized in that, Include: A housing, on which a sliding groove is provided; Four adjusting plates are symmetrically arranged on both sides of the slide groove and detachably connected to the housing, and the position of the adjusting plates within the housing is adjustable; Four magnetic switches, each of which is detachably connected to one of the adjustment plates; Three indicator lights are mounted on the housing. A pair of power input ports are electrically connected to the magnetic switch and the indicator light, respectively.

2. The magnet detection device as described in claim 1, characterized in that, The three indicator lights are: a first indicator light, a second indicator light, and a third indicator light, which are connected in parallel and electrically connected to the power input port.

3. The magnet detection device as described in claim 2, characterized in that, The first indicator light is blue, the second indicator light is green, and the third indicator light is red.

4. The magnet detection device as described in claim 2, characterized in that, The four magnetic switches are: a first magnetic switch, a second magnetic switch, a third magnetic switch, and a fourth magnetic switch; The first magnetic switch and the second magnetic switch are respectively disposed on both sides of the slide groove; The third magnetic switch and the fourth magnetic switch are respectively disposed on both sides of the slide groove; The first magnetic switch and the third magnetic switch are connected in parallel and then connected in series with the second indicator light. The second magnetic switch and the fourth magnetic switch are connected in parallel and then connected in series with the third indicator light.

5. The magnet detection device as described in claim 1, characterized in that, The housing is also provided with a storage slot, which is connected to the slide groove.

6. The magnet detection device as described in claim 1, characterized in that, It also includes: a toothpick, which is used to move a magnet within the groove.

7. The magnet detection device as described in claim 1, characterized in that, The adjustment plate is provided with an elongated hole, and screws pass through the elongated hole to connect the adjustment plate to the housing.

8. The magnet detection device as described in claim 1, characterized in that, The housing is hollow inside, and the adjustment plate and the magnetic switch are disposed inside the housing.

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