Non- / one-rotation reset selectable angle detector and detection method thereof

Abstract

The present application is to prevent the angle detector from deviating from the magnetic pole of the motor, and to improve the reliability of the angle detector. The present application is a non-resettable / resettable one-rotation reset selectable angle detector and a detection method thereof, which is configured to input a serial signal (2) from an external device (6) to a ROM (3) and a gating circuit (4), and input a ROM output (3a) from the ROM (3) to the gating circuit (4), and send a final signal (4a) composed of a non-reset (0) / reset (1) from the gating circuit (4) to a one-rotation reset action circuit (4A), wherein the serial signal (2) is configured to include a non-resettable / resettable signal (6A) and a reset signal (6B), and the selection of the non-resettable / resettable one-rotation reset of the angle detector (1) can be performed from the external device (6).

Description

Technical Field

[0001] This invention relates to a non-resettable / resettable angle detector and its detection method, and in particular, to a new improvement for enabling a non-resettable / resettable selection of the angle detector via serial communication. Background Technology

[0002] Previously, as a method for resetting such rotational data, examples include the configurations in Patent Documents 1 and 2, but these configurations are not the same as those in this application. In Patent Document 1, absolute data is recorded in a memory, and when the power is turned on, the absolute data is used to perform a subtraction operation to find the zero position.

[0003] Furthermore, in Patent Document 2, the configuration is such that the magnetic pole position of the AC servo motor can be detected without using a three-phase pulse signal, and the encoder reading value can be directly used as the absolute position on the system side.

[0004] The reset methods and magnetic pole position detection methods disclosed in the aforementioned patent documents 1 and 2 have complex circuit configurations, and therefore a reset method with a simpler circuit configuration is desired.

[0005] Furthermore, although not disclosed in patent documents, in commonly used non-resettable / resettable angle detectors, the non-resettable / resettable option cannot be selected by the customer, i.e., by an external device including an automated processing machine, injection molding machine, etc., which is delivered to the factory, and the initially set fixed state is maintained.

[0006] That is, if a resettable setting is written to the ROM, the angle detector will necessarily be reset when a reset signal is received.

[0007] Furthermore, if a non-resettable condition is written to the ROM, the reset signal will not be sent to the angle detector and will be ignored.

[0008] Therefore, due to misoperation or malfunction during motor operation, even when the timing for a single rotational reset of the encoder is not required, a reset may occur, sometimes resulting in a magnetic pole offset from the motor.

[0009] Existing technical documents

[0010] Patent documents

[0011] Patent Document 1: Japanese Patent Application Publication No. 2000-258189

[0012] Patent Document 2: Japanese Patent Application Publication No. 4-305118 Summary of the Invention

[0013] The problem that the invention aims to solve

[0014] The present invention was made to solve the problems described above, and in particular, to enable the selection of whether to accept or ignore a reset signal using a simple ASIC circuit configuration with serial signals.

[0015] Solution for solving the problem

[0016] Regarding the non-resettable / resettable selectable angle detector and its detection method of the present invention, the present invention is configured as follows: In the non-resettable / resettable selectable angle detector configured to input a serial signal from an external device to a gating circuit via a serial signal determination circuit, and input a ROM output from a ROM to the gating circuit, and send a final signal including non-reset (0) / reset (1) from the gating circuit to a single-rotation reset operation circuit connected to the subsequent stage of the gating circuit, the serial signal includes a non-resettable / resettable signal and a reset signal, and the non-resettable / resettable selectable angle detector can be performed from the external device; Furthermore, the present invention is configured and methoded as follows: a non-resettable / resettable command is sent to the ROM via the serial signal, when the non-resettable command is sent, a non-resettable command is written to the ROM, and a resettable command is written in the case of a resettable command, when the reset signal is sent via the serial signal, if the ROM is non-resettable, no reset is performed, and if the ROM is resettable, a reset is performed; Furthermore, the present invention is configured and methoded as follows: regarding the ROM state of the ROM When the external device having the angle detector and motor is delivered to the customer, it is resettable. When the angle detector is installed on the motor and the magnetic poles are aligned, a reset command is sent via the serial signal, and the ROM state automatically switches to non-resettable. Then, if a reset is desired, a reset release command is sent via the serial signal, rewriting the ROM to be resettable again. Furthermore, the present invention has the following configuration and method: the ROM can be directly written from the outside. Furthermore, the present invention has the following configuration and method: the serial signal determination circuit (2A) includes a pair of independent first and second serial signal determination circuits. The first reset signal determination result from the first serial signal determination circuit with the input non-resettable / resettable signal is input to the ROM, and the second reset signal determination result from the second serial signal determination circuit with the input reset signal is input to the gating circuit. Furthermore, the present invention has the following configuration and method: the first reset signal determination result from the first serial signal determination circuit is sent to the ROM via an independent other signal line connected to the first serial signal determination circuit.

[0017] Invention Effects

[0018] The non-rotatable / resettable selectable angle detector and its detection method of the present invention are configured as described above, and thus the following effects can be obtained.

[0019] That is, by inputting a serial signal from the angle detector to the ROM and the gating circuit, and inputting an output signal from the ROM to the gating circuit, a final signal that can be either non-resettable or resettable can be obtained from the gating circuit. Therefore, it is possible to prevent magnetic pole misalignment of the motor caused by performing a reset at an unnecessary time. Thus, it is possible to prevent magnetic pole misalignment of the angle detector, including the encoder, and the motor (which has occurred in the past).

[0020] Furthermore, since the customer can choose between non-resettable and resettable, the reliability of the angle detector installed on the motor can be improved. That is, by means of serial communication, it is possible to select whether to accept or ignore a reset signal. This is an effective means of ensuring the encoder data is error-free by preventing unintentional rotational reset during the operation of an external device, thus improving the encoder's reliability. Attached Figure Description

[0021] Figure 1 This is a schematic circuit diagram illustrating the reset circuit of a non-rotatable / resettable selectable angle detector according to an embodiment of the present invention.

[0022] Figure 2 It means Figure 1 Circuit diagrams for ROM writing methods (A) and (B).

[0023] Figure 3 It means Figure 1 The table shows the reset signal, non-reset / resettable, and non-reset / resettable logic.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1... Angle detector;

[0026] 1B... Angle signal output section;

[0027] 1C... Angle signal;

[0028] 2...serial signal;

[0029] 3...ROM;

[0030] 3a……ROM output;

[0031] 4... Gating circuit;

[0032] 4a...final signal;

[0033] 4A... Single-cycle reset circuit;

[0034] 5...motor;

[0035] 6...external devices;

[0036] 6A... Non-resettable / Resettable signal;

[0037] 6B...Reset signal;

[0038] 2A... Serial signal determination circuit;

[0039] 2A'……First serial signal determination circuit;

[0040] 2A”……Second serial signal determination circuit;

[0041] 2Aa……Reset signal determination result;

[0042] 2AE... other signal lines;

[0043] 2Ab……First unresettable / resettable signal determination result;

[0044] 2Ac……Second reset signal determination result;

[0045] 2Ad……Result of non-resettable / resettable signal determination;

[0046] 10……Write input;

[0047] 1A……ASIC constructs a reset circuit. Detailed Implementation

[0048] The present invention provides a non-resettable / resettable angle detector and method, which in particular enables non-resettable / resettable selection of the angle detector via a serial signal from an external device.

[0049] [Example]

[0050] Hereinafter, with reference to the accompanying drawings, preferred embodiments of the non-rotatable / resettable selectable angle detector and its detection method of the present invention will be described.

[0051] Figure 1 This is a schematic reset circuit for a non-rotatable / rotatable resettable selectable angle detector according to an embodiment of the present invention. Figure 2 (A) Figure 2 (B) means Figure 1 The circuit diagram for the ROM writing method. Figure 3 It means Figure 1 The logical table.

[0052] exist Figure 1In the figure, reference numeral 1 indicates a part of an angle detector including an encoder or resolver, wherein the angle detector 1 includes: a ROM 3, which receives a serial signal 2 via a serial signal determination circuit 2A; and a gating circuit 4, which receives a ROM output 3a from the ROM 3. The serial signal 2 is also directly input to the gating circuit 4.

[0053] The serial signal 2 is configured to be transmitted from an external device 6 that controls the motor 5, on which the angle detector 1 is integrally mounted. The above describes the situation where an operator of the external device 6 transmits the serial signal 2.

[0054] The external device 6 includes, for example, an automated processing machine or injection molding machine delivered to the customer from the applicant or a third party other than the applicant.

[0055] For the motor 5, the angle detector 1 is sometimes installed as an add-on within an external device 6.

[0056] The serial signal 2 is configured to automatically or manually send an unresettable / resettable signal 6A from the external device 6 to the serial signal determination circuit 2A, and input it to the ROM 3 according to the result determined by the serial signal determination circuit 2A.

[0057] The serial signal 2 includes a non-reset / reset (cancel) signal 6A and a reset signal 6B.

[0058] The ROM3 is configured to be writable but not rewritable (0) / resettable (1). It should be noted that, in order to confirm the state of the ROM3, i.e. the storage state, it is only necessary to read the storage content as shown by the dashed arrow.

[0059] Starting from the selection circuit 4, it is configured to output a final signal 4a [without performing (0) / performing (1) reset]. This final signal 4a is sent to the angle signal output unit 1B after passing through a rotation reset action circuit 4A. This is an effective method to ensure that the encoder data is without deviation and to prevent magnetic pole misalignment with the motor 5. The angle signal output unit 1B is configured to output an angle signal 1C.

[0060] That is, the serial signal 2 from the external device 6 is input to the ROM 3 and the gating circuit 4, and the ROM output 3a from the ROM 3 is input to the gating circuit 4. The gating circuit 4 sends the final signal 4a, which includes a non-reset (0) / reset (1) operation, to the angle signal output unit 1B through a rotation reset operation circuit 4A, and outputs the angle signal 1C. In the above configuration, the serial signal 2 includes a non-resettable / resettable signal 6A and a reset signal 6B, and the angle detector 1 can be rotated and reset from the external device 6 using the serial signal 2.

[0061] Furthermore, a non-resettable / resettable command is sent to the ROM3 and the strobe circuit 4 via the serial signal 2. When the non-resettable command is sent, the non-resettable command is written to the ROM3. When the resettable command is sent via the serial signal 2, if the ROM3 is non-resettable, it is not reset. If the ROM3 is resettable, it is set to perform a reset.

[0062] Furthermore, regarding the ROM state of the ROM3, it is resettable when the external device 6, which includes the angle detector 1 and the motor 5, is delivered to the customer. When the angle detector 1 is installed on the motor 5 and the magnetic poles are aligned, a reset command is sent via the serial signal 2, and the ROM state automatically switches to non-resettable. Then, if a reset is desired, a release reset command can be sent via the serial signal 2 to rewrite the ROM3 as resettable again.

[0063] It should be noted that in the angle detector 1, by Figure 1 The serial signal determination circuit 2A, the gating circuit 4, the single-rotation reset action circuit 4A, and the angle signal output unit 1B, represented by solid lines, are constructed from an ASIC (Application Specific IC) and are equipped with a... Figure 1 The dashed lines represent the ASIC construction processing circuit 1A and the ROM 3, which is independent of the ASIC construction processing circuit 1A.

[0064] Next, the operation of the non-reset / resettable selectable angle detector of the present invention will be described. The non-reset / resettable command is sent to the ROM3 via the serial signal 2 through the serial signal determination circuit 2A.

[0065] In this case, when the "unresettable" signal 6A is sent, an "unresettable" "0" is written to the ROM3.

[0066] In addition, resettable can be written when the resettable condition is removed.

[0067] Furthermore, when the reset signal 6B is sent via the serial signal 2, if the ROM3 is not resettable, it will not be reset. Conversely, if the ROM3 is resettable, a reset will be performed.

[0068] Furthermore, when the external device 6 with the angle detector 1 installed on the motor 5 is delivered to the customer, the state of the ROM3 is resettable. In order to reset the ROM3 when a reset command is sent via the serial signal 2 during magnetic pole alignment when the angle detector 1 is installed on the motor 5, the state of the ROM3 is automatically switched to non-resettable.

[0069] Then, if a reset is desired, a resettable command needs to be sent via the serial signal 2 to rewrite the ROM3 to be resettable again.

[0070] By performing the above actions, the result of aligning the magnetic poles of motor 5 with the magnetic poles is to prevent magnetic pole misalignment.

[0071] Furthermore, additional explanations are provided regarding the writing process to ROM3. That is, as follows: Figure 2 As shown in (A), only the reset signal 6B is input to the serial signal determination circuit 2A. For the ROM3, instead of the non-resettable / resettable signal determination result (non-resettable 0 / resettable 1) 2Ad from the serial signal determination circuit 2A, the write input 10 is input through direct write input. That is, the write input to the ROM3 is performed without going through the reset circuit 1A constructed by the ASIC.

[0072] In addition, Figure 2 In (B), a pair of independent first and second serial signal determination circuits 2A' and 2A'' are provided. The unresettable / resettable signal 6A is input to the first serial signal determination circuit 2A'. The first unresettable / resettable signal determination result 2Ab is sent directly to the ROM3 through an independent other signal line 2AE connected to the first serial signal determination circuit 2A'. The ROM output 3a is input to the gating circuit 4. Moreover, the reset signal 6B is input to the second serial signal determination circuit 2A'', and the second determination result 2Ac is input to the gating circuit 4.

[0073] In addition, such as Figure 3 As shown, the non-resettable / resettable states of ROM3 are 0, 0, 1, 1. Correspondingly, the reset signal is 0, 1, 0, 1. Therefore, reset / non-reset becomes 0, 0, 0, 1, and the reset action is only performed in the fourth state.

[0074] Industrial availability

[0075] In the non-resettable / resettable selectable angle detector and its detection method of the present invention, a serial signal from an external device using a motor with an angle detector is input to a ROM and a gating circuit, and a final signal 4a indicating whether a reset is possible or not is obtained from the gating circuit, thereby preventing the magnetic pole offset of the motor that occurred previously.

Claims

1. A non-resettable / resettable selectable angle detector, comprising a serial signal determination circuit (2A), a ROM (3), a gating circuit (4), and a resettable operation circuit (4A), configured to input a serial signal (2) from an external device (6) to the gating circuit (4) via the serial signal determination circuit (2A), and input a ROM output (3a) from the ROM (3) indicating non-resettable / resettable to the gating circuit (4), and send a final signal (4a) from the gating circuit (4) including non-resettable / resettable 0 to the resettable operation circuit (4A) connected to the gating circuit (4), wherein the non-resettable / resettable selectable angle detector is characterized in that it is configured as follows: The serial signal (2) includes a non-resettable / resettable signal (6A) and a reset signal (6B), and can be selected from the external device (6) for non-resettable / resettable rotation of the angle detector (1). The non-resettable / resettable signal (6A) and the reset signal (6B) are input to the serial signal determination circuit (2A). The non-resettable signal determination result (2Ad) from the serial signal determination circuit (2A) with the input non-resettable / resettable signal (6A) is input to the ROM (3), and the reset signal determination result (2Aa) from the serial signal determination circuit (2A) with the input reset signal (6B) is input to the gating circuit (4).

2. A non-resettable / resettable selectable angle detector, comprising a serial signal determination circuit (2A), a ROM (3), a gating circuit (4), and a resettable operation circuit (4A), configured to input a serial signal (2) from an external device (6) to the gating circuit (4) via the serial signal determination circuit (2A), and input a ROM output (3a) from the ROM (3) indicating non-resettable / resettable to the gating circuit (4), and send a final signal (4a) from the gating circuit (4) including non-resettable / resettable 0 to the resettable operation circuit (4A) connected to the gating circuit (4), wherein the non-resettable / resettable selectable angle detector is characterized in that it is configured as follows: The serial signal (2) includes a non-resettable / resettable signal (6A) and a reset signal (6B), and can be selected from the external device (6) for non-resettable / resettable rotation of the angle detector (1). The serial signal determination circuit (2A) includes a pair of independent first and second serial signal determination circuits (2A', 2A''). The non-resettable / resettable signal (6A) is input to the first serial signal determination circuit (2A''), and the reset signal (6B) is input to the second serial signal determination circuit (2A''). The first non-resettable signal determination result (2Ab) from the first serial signal determination circuit (2A') with the input non-resettable / resettable signal (6A) is input to the ROM (3), and the second reset signal determination result (2Ac) from the second serial signal determination circuit (2A') with the input reset signal (6B) is input to the gating circuit (4).

3. The non-rotatable / resettable selectable angle detector according to claim 1 or 2, characterized in that, The composition is as follows: The serial signal (2) sends the command of the non-resettable / resettable signal (6A) to the ROM (3) through the serial signal determination circuit (2A). When the non-resettable signal is sent, the non-resettable signal is written to the ROM (3). When the resettable signal is sent, the resettable signal is written. When the command of the reset signal is sent through the serial signal (2), if the ROM (3) is non-resettable, the final signal (4a) including 0 indicating no reset is sent from the gating circuit (4). If the ROM (3) is resettable, the final signal (4a) including 1 indicating reset is sent from the gating circuit (4).

4. The non-rotatable / resettable selectable angle detector according to claim 1 or 2, characterized in that, The composition is as follows: Regarding the ROM state of the ROM (3), it can be reset when the external device (6) with the angle detector (1) and the motor (5) is delivered to the customer. When the angle detector (1) is installed on the motor (5) and the magnetic poles are aligned, it is reset when a reset command is sent through the serial signal (2). After that, the ROM state automatically switches to non-resettable. Then, if a reset is desired, a reset command is sent through the serial signal (2) to rewrite the ROM (3) to be resettable again.

5. The non-rotatable / resettable selectable angle detector according to claim 1, characterized in that, The composition is as follows: For the ROM (3), instead of inputting the non-resettable / resettable signal (6A) to the serial signal determination circuit (2A), the non-resettable / resettable signal can be written directly to the ROM (3) from the outside.

6. The non-rotatable / resettable selectable angle detector according to claim 2, characterized in that, The first non-resettable signal determination result (2Ab) from the first serial signal determination circuit (2A') is sent to the ROM (3) via a separate other signal line (2AE) connected to the first serial signal determination circuit (2A').

7. A detection method for a selectable angle detector that can be rotated and reset in one operation, characterized in that, The non-resettable / resettable selectable angle detector includes a serial signal determination circuit (2A), a ROM (3), a gating circuit (4), and a single-rotation reset operation circuit (4A). It is configured to input a serial signal (2) from an external device (6) to the gating circuit (4) via the serial signal determination circuit (2A), and input a ROM output (3a) from the ROM (3) indicating non-resettable / resettable to the gating circuit (4). The gating circuit (4) then sends a final signal (4a) including non-resettable / resettable 0 / 1 reset to the single-rotation reset operation circuit (4A) connected to the gating circuit (4). In the non-resettable / resettable selectable angle detector, The serial signal (2) includes a non-resettable / resettable signal (6A) and a reset signal (6B), and can be selected from the external device (6) for non-resettable / resettable rotation of the angle detector (1). The non-resettable / resettable signal (6A) and the reset signal (6B) are input to the serial signal determination circuit (2A). The non-resettable signal determination result (2Ad) from the serial signal determination circuit (2A) with the input non-resettable / resettable signal (6A) is input to the ROM (3), and the reset signal determination result (2Aa) from the serial signal determination circuit (2A) with the input reset signal (6B) is input to the gating circuit (4).

8. A detection method for a selectable angle detector that can be rotated and reset in one operation, characterized in that, The non-resettable / resettable selectable angle detector includes a serial signal determination circuit (2A), a ROM (3), a gating circuit (4), and a single-rotation reset operation circuit (4A). It is configured to input a serial signal (2) from an external device (6) to the gating circuit (4) via the serial signal determination circuit (2A), and input a ROM output (3a) from the ROM (3) indicating non-resettable / resettable to the gating circuit (4). The gating circuit (4) then sends a final signal (4a) including non-resettable / resettable 0 / 1 reset to the single-rotation reset operation circuit (4A) connected to the gating circuit (4). In the non-resettable / resettable selectable angle detector, The serial signal (2) includes a non-resettable / resettable signal (6A) and a reset signal (6B), and can be selected from the external device (6) for non-resettable / resettable rotation of the angle detector (1). The serial signal determination circuit (2A) includes a pair of independent first and second serial signal determination circuits (2A', 2A''). The non-resettable / resettable signal (6A) is input to the first serial signal determination circuit (2A''), and the reset signal (6B) is input to the second serial signal determination circuit (2A''). The first non-resettable signal determination result (2Ab) from the first serial signal determination circuit (2A') with the input non-resettable / resettable signal (6A) is input to the ROM (3), and the second reset signal determination result (2Ac) from the second serial signal determination circuit (2A') with the input reset signal (6B) is input to the gating circuit (4).

9. The detection method of the non-rotatable / resettable selectable angle detector according to claim 7 or 8, characterized in that, The serial signal (2) sends the command of the non-resettable / resettable signal (6A) to the ROM (3) through the serial signal determination circuit (2A). When the non-resettable signal is sent, the non-resettable signal is written to the ROM (3). When the resettable signal is sent, the resettable signal is written. When the command of the reset signal is sent through the serial signal (2), if the ROM (3) is non-resettable, the final signal (4a) including 0 indicating no reset is sent from the gating circuit (4). If the ROM (3) is resettable, the final signal (4a) including 1 indicating reset is sent from the gating circuit (4).

10. The detection method of the non-rotatable / resettable selectable angle detector according to claim 7 or 8, characterized in that, Regarding the ROM state of the ROM (3), when the external device (6) having the angle detector (1) and the motor (5) is delivered to the customer, it is resettable. When the angle detector (1) is installed on the motor (5) and the magnetic poles are aligned, a reset command is sent via the serial signal (2) to reset the ROM state. After that, the ROM state automatically switches to non-resettable. Then, if a reset is desired, a reset command is sent via the serial signal (2) to rewrite the ROM (3) to be resettable again.

11. The detection method of the non-rotatable / resettable selectable angle detector according to claim 7, characterized in that, For the ROM (3), instead of inputting the non-resettable / resettable signal (6A) to the serial signal determination circuit (2A), the non-resettable / resettable signal can be written directly to the ROM from the outside.

12. The detection method of the non-rotatable / resettable selectable angle detector according to claim 8, characterized in that, The first non-resettable signal determination result (2Ab) from the first serial signal determination circuit (2A') is sent to the ROM (3) via a separate other signal line (2AE) connected to the first serial signal determination circuit (2A').

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