Cylindrical linear motor rotor magnetic pole detector

Abstract

The invention relates to the technical field of magnetic pole detection equipment, in particular to a cylindrical linear motor mover magnetic pole detector, comprising: a housing, the upper end of which is provided with an accommodating groove in which a to-be-detected magnetic bar is placed; wherein a plurality of detection pieces and a control unit are installed in the shell, the plurality of detection pieces are electrically connected with the control unit, and the plurality of detection pieces correspond to the positions of all magnetic poles of the magnetic bar in sequence. When in use, the rotor magnetic bar is placed in the accommodating groove of the detector, the positions of all magnetic poles to be detected in the magnetic bar are aligned with the positions of all magnetic sensors in the detector, and the detector is further provided with the indicating piece, so that the detector can conveniently and intuitively give a sound prompt or a flashlight indication according to a judgment result. And when an error is detected, the error can be positioned, so that the production and repair time is greatly saved, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic pole detection equipment, and in particular to a magnetic pole detector for a rotor of a cylindrical linear motor. Background Art

[0002] As a special type of motor, cylindrical linear motors have important applications in precision positioning, electromagnetic ejection, light weapons simulation training equipment and other fields. However, their scope of application is relatively limited, especially in light weapons simulation training equipment, which is limited by the size and shape of the adapted model space. Therefore, this type of motor is usually designed and produced by the manufacturer using it according to specific needs. As a special equipment, it has not yet achieved large-scale automated production.

[0003] A key component of the cylindrical linear motor is the rotor magnet bar, which consists of multiple permanent magnets pressed into a stainless steel cylinder in a specific magnetic pole direction and sequence and sealed by laser welding. During the production process, the direction and sequence of the permanent magnets are mainly completed manually. Since the permanent magnets are short silver metal cylinders and the N and S poles are difficult to distinguish with the naked eye, it is easy to cause the wrong installation direction, resulting in unqualified products.

[0004] At present, there are two main methods for detecting the mover magnetic bar: one is to use a magnet with a known magnetic pole indicating color to detect the position of each magnetic pole in the magnetic bar, and manually judge whether the magnetic pole arrangement meets the design requirements based on the principle of repulsion and attraction between magnetic poles; the other is to use a small compass to detect the relevant magnetic pole positions of the magnetic bar, and also judge the correctness of the magnetic pole arrangement based on the principle of interaction between magnetic poles. Both methods require manual operation, judgment and recording. For mover magnetic bars containing a dozen to dozens of magnetic poles, the manual detection process is cumbersome, time-consuming, and prone to human errors. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art, such as the need for manual operation, judgment and recording, and the cumbersome and time-consuming manual detection process for the rotor magnetic rod containing a dozen to dozens of magnetic poles, and to propose a cylindrical linear motor rotor magnetic pole detector.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] Design a cylindrical linear motor rotor magnetic pole detector, including:

[0008] The housing has a receiving slot at the upper end thereof, and the magnetic bar to be detected is placed in the receiving slot;

[0009] Among them, a number of detection components and a control unit are installed inside the shell, a number of the detection components are electrically connected to the control unit, a number of the detection components correspond to the magnetic pole positions of the magnetic bar in sequence, and at least one indicator is also arranged on the end surface of the shell, and the indicator is electrically connected to the control unit to indicate the current magnetic detection state.

[0010] Furthermore, the detection element is a magnetic sensor, and a plurality of the magnetic sensors are distributed along a straight line on the inner side of the housing;

[0011] The control unit includes a circuit board fixed inside the housing, a single-chip microcomputer is electrically connected to the circuit board, and each of the magnetic sensors is electrically connected to the single-chip microcomputer.

[0012] Furthermore, the single-chip board is also provided with a serial port for connecting to an external terminal.

[0013] Furthermore, the indicator is an indicator light and / or a speaker, and the indicator light and / or the speaker is electrically connected to an output pin of the single chip microcomputer.

[0014] Furthermore, the detection element is a magnetic sensor, and a plurality of the magnetic sensors are distributed along a straight line on the inner side of the housing;

[0015] The control unit includes a transistor, the output end of the magnetic sensor is connected to the base of the transistor, the collector of the transistor is connected to the indicator, and the emitter is grounded, and the positive input and negative input of the magnetic sensor are connected to VCC and ground respectively.

[0016] Furthermore, the indicator is an indicator light, and a plurality of the indicator lights are arranged on the side of the shell, wherein the plurality of indicator lights correspond one by one to the plurality of transistors in sequence and are located on the sides of each magnetic pole of the magnetic bar in sequence.

[0017] Furthermore, the input end of the indicator light is connected to VCC via a resistor R1, and the other end is electrically connected to the collector of the transistor, and a resistor R7 is further connected between the output end of the magnetic sensor and VCC.

[0018] Further, when the magnetic sensor corresponds to the N level of the magnetic bar, the collector of the transistor is connected to VCC through the resistor R1 and the indicator light, and a resistor R13 is connected in series between its base and the magnetic sensor;

[0019] When the magnetic sensor corresponds to the S level of the magnetic bar, a resistor R14 and an inverting circuit U1A are connected in series between the output end of the magnetic sensor and the base of the transistor.

[0020] Furthermore, the housing includes an upper shell and a lower shell which are fixed to each other, and the receiving groove is formed on the end surface of the upper shell, wherein the receiving groove is a semicircular groove.

[0021] Furthermore, heat dissipation holes and four matrix-distributed foot pads are provided at the bottom of the lower shell.

[0022] The invention provides a cylindrical linear motor mover magnetic pole detector, which has the beneficial effects of replacing manual detection by single chip microcomputer or circuit control. When in use, the mover magnetic bar is placed in the receiving slot of the detection, so that the positions of all magnetic poles to be detected in the magnetic bar are aligned with the positions of the magnetic sensors inside the detector, ensuring that no deviation occurs, thus avoiding the problem of manual test position error.

[0023] Secondly, the detector is also provided with an indicator, which gives a sound prompt or a flash light indication of the judgment result, which is convenient and intuitive. When an error is detected, the error can be located, which greatly saves production and rework time and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional diagram of the first embodiment of the present invention;

[0025] Figure 2 is a cross-sectional view of the first embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the foot pad portion of the first embodiment of the present invention;

[0027] Figure 4 It is a stereogram of the second embodiment of the present invention;

[0028] Figure 5 is a cross-sectional view of a second embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of magnetic flux lines of each magnetic pole in a magnetic bar according to an embodiment of the present invention;

[0030] Figure 7 This is a pin circuit diagram of a control unit according to an embodiment of the present invention;

[0031] Figure 8 This is a circuit diagram of a detection element according to a first embodiment of the present invention;

[0032] Fig. 9 is a circuit diagram of a speaker according to an embodiment of the present invention;

[0033] Fig.10 A circuit diagram of a serial port according to an embodiment of the present invention;

[0034] Fig.11 This is a circuit diagram of a detection element corresponding to the N pole of the second embodiment of the present invention;

[0035] Fig.12 This is a circuit diagram of the detection element corresponding to the S pole of the second embodiment of the present invention.

[0036] In the figure: 1. outer shell; 11. receiving slot; 12. upper shell; 13. lower shell; 14. heat dissipation hole; 15. foot pad; 2. magnetic rod; 3. detection part; 4. control unit; 5. indicator. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] Embodiment 1

[0039] Reference Figure 1-Figure 3 An embodiment of the present invention discloses a magnetic pole detector for a cylindrical linear motor mover, the detector comprising a housing 1, the upper end of which has a receiving slot 11, and a magnetic bar 2 to be detected is placed in the receiving slot 11;

[0040] Among them, a plurality of detection components 3 and a control unit 4 are installed inside the shell 1, and a plurality of the detection components 3 are electrically connected to the control unit 4. A plurality of the detection components 3 correspond to the magnetic pole positions of the magnetic bar 2 in sequence. At least one indicator 5 is also arranged on the end surface of the shell 1, and the indicator 5 is electrically connected to the control unit 4 to indicate the current magnetic detection state.

[0041] In some embodiments, the detection element 3 in the present invention is a magnetic sensor, which is a Hall sensor, and a plurality of the magnetic sensors are distributed along a straight line on the inner side of the housing 1;

[0042] The control unit 4 includes a circuit board fixed inside the housing 1 , a single-chip microcomputer is electrically connected to the circuit board, and each of the magnetic sensors is electrically connected to the single-chip microcomputer.

[0043] On the basis of the above embodiment, the single-chip board in this embodiment is further provided with a serial port for connecting to an external terminal.

[0044] Furthermore, the indicator 5 is an indicator light and / or a speaker, and the indicator light and / or the speaker is electrically connected to an output pin of the single chip microcomputer.

[0045] Specifically, in this embodiment, the housing 1 provides installation space and support for the internal control unit 4, and the circuit board is installed inside the housing 1 by fixing screws. At the same time, the upper part of the housing 1 is formed into a receiving groove 11, and its length is just enough to accommodate the length of the magnetic rod 2 to be tested, so that the magnetic rod 2 is placed in the slot without any space for shaking left and right;

[0046] Each magnetic sensor is aligned with each magnetic pole position of the magnetic bar 2 to be tested, and each magnetic sensor corresponds to one magnetic pole, converting the magnetic signal into a digital electrical signal, and sending the corresponding data to the IO port of the single-chip microcomputer through the circuit. After the single-chip microcomputer reads the electrical signal sent by the magnetic sensor, it compares it with the normal value pre-stored in the program. When the test result is correct, the green light of the indicator light is on under the control of the single-chip microcomputer program, and the red light is off; when the test result is wrong, the green light is off, and the red light flashes under the control of the single-chip microcomputer program;

[0047] Specific as Figure 6 As shown, the rotor of the cylindrical linear motor is composed of several cylindrical permanent magnets arranged in a straight line in a stainless steel tube, separated by a cylindrical copper pad in the middle, with the N pole of the magnet facing the N pole and the S pole facing the S pole. Due to the principle that the same poles of magnets repel each other, the magnetic flux lines are squeezed, and approximately parallel magnetic flux lines are formed at both ends of the magnets. The direction is perpendicular to the direction of the rotor magnetic rod itself, with the N pole direction outward and the S pole direction inward. The sensor is located in the middle of the interval between the two magnets, so that the magnetic flux lines pass through the sensor vertically. After the sensor is powered on, it outputs a digital signal "1" under the action of the N pole and outputs a digital signal "0" under the action of the S pole.

[0048] like Figure 7 as well as Figure 8 As shown, Figure 1 is a schematic diagram of the wiring of each pin of the single chip microcomputer in the present invention, Figure 8 It is a wiring circuit diagram of multiple magnetic sensors, that is, in the present invention, the output end of each magnetic sensor is connected to the input end of the single chip microcomputer to realize electrical connection, so as to complete the signal input detection of the magnetic sensor.

[0049] Of course, the present invention can also provide voice reminders by connecting to a speaker. If the result is correct, the speaker is controlled to play a sound "test normal". If the test result is wrong, the single chip microcomputer plays a sound "test result error, position X" through the speaker. "X" represents the position code of the magnetic pole error, which is a number. Combined with the voice prompt, the function of simultaneously prompting the test result with sound and light is achieved. Specifically, Fig. 9 As shown, it is a connection circuit of the speaker in the present invention;

[0050] Reference Fig.10 In addition, the circuit board of the present invention can also be connected to a computer via a serial port. During testing, the magnetic sensor number of the error position can be sent to the computer via a computer interface, and the magnetic pole number of the error position can be displayed on the computer screen to directly locate and indicate the error position.

[0051] like Figure 1As shown, in the present invention, a connecting wire is arranged on the shell 1, and the connecting wire is a cable of a USB interface, and has two power wires and two communication wires inside. The connecting wire is electrically connected to the circuit board, and is used to connect to an external computer and power the circuit board. When the connecting wire is used with an external power supply, it is not necessary to connect to the computer, and only the sound prompt and indicator light on the detector are used to determine the test result. When there is also a power supply on the computer interface and the computer is connected with the connecting wire, there is no need to connect the external power supply, and the power provided by the computer USB interface can be used to work normally.

[0052] In a further embodiment, the housing 1 of the present invention comprises an upper shell 12 and a lower shell 13 which are fixed to each other, and the receiving groove 11 is formed on the end surface of the upper shell 12, wherein the receiving groove 11 is a semicircular groove.

[0053] In addition, in this embodiment, heat dissipation holes 14 and four matrix-distributed foot pads 15 are provided at the bottom of the lower shell 13. The foot pads 15 are used to enhance the anti-slip ability of the entire device. Specifically, the foot pads 15 described in this embodiment can be provided with silicone pads.

[0054] Embodiment 2

[0055] Reference Figure 4-Figure 5 The same points as those in the first embodiment are not described in detail here. The difference is that the detection element 3 in the present embodiment is a magnetic sensor, and a plurality of the magnetic sensors are distributed along a straight line on the inner side of the housing 1.

[0056] The control unit 4 includes a transistor, the output end of the magnetic sensor is connected to the base of the transistor, the collector of the transistor is connected to the indicator 5, and the emitter is grounded, and the positive input and negative input of the magnetic sensor are connected to VCC and ground respectively.

[0057] In more detail, the indicator 5 described in this embodiment is an indicator light, and the indicator light described in this embodiment is preferably a light emitting diode. A plurality of indicator lights are arranged on the side of the housing 1, wherein the plurality of indicator lights correspond one-to-one with the plurality of transistors in turn, and are located on the sides of the magnetic poles of the magnetic bar in turn. By adopting the design of multiple indicator lights, an independent circuit is formed with each transistor, so that the magnetic pole position of each magnetic bar 2 can be detected. When a magnetic pole error occurs, the indication of the indicator light 5 can be used to quickly determine the misaligned position.

[0058] Preferably, in this embodiment, the input end of the indicator light is connected to VCC via a resistor R1, and the other end is electrically connected to the collector of the transistor, and a resistor R7 is further connected between the output end of the magnetic sensor and VCC.

[0059] Reference Fig.11On the basis of the above embodiments, in this embodiment, when the magnetic sensor corresponds to the N level of the magnetic bar, the collector of the transistor is connected to VCC through the resistor R1 and the indicator light, and a resistor R13 is connected in series between its base and the magnetic sensor. Further, in this embodiment, R7 is a pull-up resistor to strengthen the weak output signal of the Hall sensor; R13 has a current limiting and isolation function, and when one of the sensor or the transistor fails, the other will not be burned; R1 is a current limiting resistor to protect the transistor and control the LED brightness, and all three are set to fixed resistance resistors.

[0060] Reference Fig.12 When the magnetic sensor corresponds to the S level of the magnetic bar, a resistor R14 and an inverting circuit U1A are connected in series between the output end of the magnetic sensor and the base of the transistor.

[0061] That is to say, in the embodiment of the present invention, multiple transistors and multiple paired magnetic sensors are used to align the positions of the magnetic poles, and the output of the sensor is connected to the base of the transistor to control whether the transistor is turned on or not. When the magnetic pole is correct, the sensor outputs a high-level magnetic pole (N pole), and the indicator light is lit; when the magnetic pole is correct, the sensor outputs a low-level magnetic pole (S pole), and an inverting circuit U1A needs to be added to turn on the transistor, thereby lighting the indicator light. Whether each magnetic pole is correct is determined by whether the indicator lights are all on.

[0062] That is, in this embodiment, a single chip design is not adopted, and only a circuit composed of multiple transistors and magnetic sensors can be used to realize the magnetic pole detection of the magnetic rod 2. People in the relevant field can select a specific implementation method according to actual needs, and no further details will be given here.

[0063] In summary, the present invention uses a single chip microcomputer or circuit control to replace manual detection. When in use, the mover magnetic bar is placed in the receiving slot 11 of the detection, so that the positions of all magnetic poles to be detected in the magnetic bar are aligned with the positions of the magnetic sensors inside the detector to ensure that no deviation occurs, thereby avoiding the problem of manual test position errors.

[0064] Use a single-chip microcomputer plus a magnetic sensor to detect the relevant polarity and compare it with the correct value pre-stored in the program. The program automatically determines the value, which greatly improves the detection efficiency and avoids the problem of human judgment errors.

[0065] Secondly, the detector is also provided with an indicator 5, which gives a sound prompt or a flash light indication for the judgment result, which is convenient and intuitive, and can locate the error when an error is detected, greatly saving production and rework time and improving production efficiency.

[0066] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A cylindrical linear motor rotor magnetic pole detector, characterized in that: include: The housing (1) has a receiving groove (11) at its upper end, and the magnetic rod (2) to be detected is placed in the receiving groove (11); A plurality of detection elements (3) and a control unit (4) are installed inside the housing (1); the plurality of detection elements (3) are electrically connected to the control unit (4); the plurality of detection elements (3) correspond to the magnetic pole positions of the magnetic bar (2) in sequence; and at least one indicator (5) is also arranged on the end surface of the housing (1); the indicator (5) is electrically connected to the control unit (4) for indicating the current magnetic detection state.

2. A cylindrical linear motor rotor magnetic pole detector according to claim 1, characterized in that: The detection element (3) is a magnetic sensor, and a plurality of the magnetic sensors are distributed along a straight line on the inner side of the housing (1); The control unit (4) comprises a circuit board fixed inside the housing (1), a single-chip microcomputer is electrically connected to the circuit board, and each of the magnetic sensors is electrically connected to the single-chip microcomputer.

3. A cylindrical linear motor rotor magnetic pole detector according to claim 2, characterized in that: The single-chip board is also provided with a serial port for connecting to an external terminal.

4. A cylindrical linear motor rotor magnetic pole detector according to any one of claims 1 to 3, characterized in that: The indicator (5) is an indicator light and / or a speaker, and the indicator light and / or the speaker are electrically connected to an output pin of the single chip computer.

5. The cylindrical linear motor rotor magnetic pole detector according to claim 1, characterized in that: The detection element (3) is a magnetic sensor, and a plurality of the magnetic sensors are distributed along a straight line on the inner side of the housing (1); The control unit (4) comprises a transistor, the output end of the magnetic sensor is connected to the base of the transistor, the collector of the transistor is connected to the indicator (5), and the emitter is grounded, and the positive input and negative input of the magnetic sensor are connected to VCC and ground respectively.

6. A cylindrical linear motor rotor magnetic pole detector according to claim 5, characterized in that: The indicating member (5) is an indicator light, and a plurality of the indicator lights are arranged on the side of the housing (1), wherein the plurality of the indicator lights correspond one-to-one with the plurality of the triodes in sequence and are located in sequence on the sides of the respective magnetic poles of the magnetic bar.

7. A cylindrical linear motor rotor magnetic pole detector according to claim 6, characterized in that: The input end of the indicator light is connected to VCC via a resistor R1, and the other end is electrically connected to the collector of the transistor. A resistor R7 is further connected between the output end of the magnetic sensor and VCC.

8. The cylindrical linear motor rotor magnetic pole detector according to claim 7, characterized in that: When the magnetic sensor corresponds to the N level of the magnetic bar, the collector of the transistor is connected to VCC through the resistor R1 and the indicator light, and a resistor R13 is connected in series between its base and the magnetic sensor; When the magnetic sensor corresponds to the S level of the magnetic bar, a resistor R14 and an inverting circuit U1A are connected in series between the output end of the magnetic sensor and the base of the transistor.

9. The cylindrical linear motor rotor magnetic pole detector according to claim 1, characterized in that: The housing (1) comprises an upper shell (12) and a lower shell (13) which are fixed to each other, and the receiving groove (11) is formed on the end surface of the upper shell (12), wherein the receiving groove (11) is a semicircular groove.

10. The cylindrical linear motor rotor magnetic pole detector according to claim 9, characterized in that: The bottom of the lower shell (13) is provided with heat dissipation holes (14) and four foot pads (15) distributed in a matrix.

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