Electronic apparatus, electronic system, and method
地域：
Tokyo
摘要
According to one embodiment, an electronic apparatus controls an operation of a control target device. The electronic apparatus is configured to generate a first timing signal, to delay the first timing signal by a first time and to generate a second timing signal for defining a transmission timing of control data related to control of the operation of the control target device, to transmit a data signal including the control data based on the second timing signal, to receive the data signal and to generate a third timing signal for a notification of reception of the data signal, and, to generate a fourth timing signal indicating a control timing of the control target device based on the control data, based on the third timing signal.
說明書
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This application is based upon and claims the benefit of priority from Japanese Patent Application No. 2020-114717, filed Jul. 2, 2020, the entire contents of which are incorporated herein by reference.
Embodiments described herein relate generally to an electronic apparatus, an electronic system, and a method.
In recent years, technologies of controlling devices such as power converters and robots of which a control timing is important, by using wireless communication, have been developed. More specifically, a technology as follows has been developed: wireless communication is performed between a first wireless device that functions as a control master and a second wireless device that functions as a slave, and the second wireless device that receives an instruction from the first wireless device controls a control target device such as a power converter or a robot.
In the above-described technology, in order to control the control target device, it is necessary to synchronize the internal clocks of the first wireless device and the second wireless device to match control timings. Such a synchronization process is performed, for example, using CPUs provided in the first wireless device and the second wireless device.
權(quán)利要求
What is claimed is:1. An electronic apparatus that controls an operation of a control target device, the electronic apparatus comprising:a first pulse generation circuit configured to generate a first timing signal; a delay circuit configured to delay the first timing signal by a first time and generate a second timing signal for defining a transmission timing of control data related to control of the operation of the control target device; a first wireless communication circuit configured to transmit a data signal including the control data based on the second timing signal; a second wireless communication circuit configured to receive the data signal and generate a third timing signal for notification of reception of the data signal; and a second pulse generation circuit configured to generate a fourth timing signal indicating a control timing of the control target device based on the control data, based on the third timing signal. 2. The electronic apparatus of claim 1 , wherein the second pulse generation circuit is configured to generate the fourth timing signal by elapse of a predetermined time from reception of the third timing signal, the predetermined time being set based on a period of each of control cycles related to the control of the operation of the control target device and a time from when the first timing signal is output until the third timing signal is received. 3. The electronic apparatus of claim 1 , wherein the second pulse generation circuit is configured to:calculate an average time from an output of the first timing signal to reception of the third timing signal in control cycles related to the control of the operation of the control target device, and generate the fourth timing signal by elapse of a predetermined time set based on the average time, from reception of the third timing signal in a first control cycle among the control cycles. 4. The electronic apparatus of claim 1 , further comprising:a counting circuit configured to measure an elapsed time in control cycles related to the control of the operation of the control target device, wherein the second pulse generation circuit is configured to:calculate an average time from an output of the first timing signal to reception of the third timing signal in the control cycles, correct a count value of the counting circuit based on a difference between the average time and a time from the output of the first timing signal to the reception of the third timing signal in a first control cycle among the control cycles, and generate the fourth timing signal when the corrected count value reaches a count value corresponding to a period of each of the control cycles. 5. The electronic apparatus of claim 1 , further comprising:a counting circuit configured to measure an elapsed time in control cycles related to the control of the operation of the control target device, wherein the second pulse generation circuit is configured to:calculate an average time from an output of the first timing signal to reception of the third timing signal in the control cycles, change a frequency of a clock input to the counting circuit based on a difference between the average time and a time from the output of the first timing signal to the reception of the third timing signal in a first control cycle among the control cycles, and generate the fourth timing signal when the count value of the counting circuit in response to an input of the clock having the changed frequency reaches a count value corresponding to a period of each of the control cycles. 6. The electronic apparatus of claim 1 , wherein:the first wireless communication circuit is configured to transmit the data signal a plurality of times during a period of each of control cycles related to the control of the operation of the control target device, and the second wireless communication circuit is configured to generate the third timing signal in response to reception of the data signal received first from among the data signals transmitted the plurality of times. 7. The electronic apparatus of claim 1 , wherein the second wireless communication circuit is configured to estimate a timing for receiving the data signal in a first control cycle among control cycles related to the control of the operation of the control target device, based on a time from an output of the first timing signal to reception of the data signal in the control cycles. 8. The electronic apparatus of claim 7 , wherein:the first wireless communication circuit is configured to transmit the data signal a plurality of times during a period of each of the control cycles, and the second wireless communication circuit is configured to generate the third timing signal in response to reception of the data signal having a smallest error in the estimated reception timing from among the data signals. 9. The electronic apparatus of claim 1 , wherein the first pulse generation circuit is configured to generate the first timing signal for each of control cycles related to the control of the operation of the control target device. 10. The electronic apparatus of claim 1 , wherein:each of the first pulse generation circuit, the delay circuit, the first wireless communication circuit, the second wireless communication circuit, and the second pulse generation circuit comprises hardware, and a time from an output of the first timing signal to reception of the third timing signal is constant in control cycles related to the control of the operation of the control target device. 11. An electronic system comprising:the electronic apparatus of claim 1 ; and an inverter configured to drive in accordance with control from the electronic apparatus, wherein the control target device is the inverter. 12. An electronic apparatus that controls an operation of a control target device, the electronic apparatus comprising:a first processor configured to:generate a first timing signal; and delay the first timing signal by a first time and generate a second timing signal for defining a transmission timing of control data related to control of the operation of the control target device; a first wireless communication circuit configured to transmit a data signal including the control data based on the second timing signal; a second wireless communication circuit configured to receive the data signal and generate a third timing signal for notification of reception of the data signal; and a second processor configured to generate a fourth timing signal indicating a control timing of the control target device based on the control data, based on the third timing signal. 13. A method that controls an operation of a control target device, the method comprising:generating a first timing signal; delaying the first timing signal by a first time and generating a second timing signal for defining a transmission timing of control data related to control of the operation of the control target device; transmitting a data signal including the control data based on the second timing signal; receiving the data signal and generating a third timing signal for notification of reception of the data signal; and generating a fourth timing signal indicating a control timing of the control target device based on the control data, based on the third timing signal.
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