JP2014087013A - Remote control receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To configure a remote control receiver to exchange a transmitter without performing bind processing or operation at a receiver side when exchanging the transmitter.SOLUTION: After powered on, first of all, a state of a mode setting switch is read. In a mode set state, a BIND code transmitted from a transmitter is received, and an identification code (transmitter unique ID) included in the BIND code is registered in an identification code storage section. A plurality of identification codes can be registered. In identification code determination processing, among the plurality of registered identification codes, the presence/absence of an identification code matched with the received identification code is determined. If the received identification code has been registered, a transmission signal or transmission data is processed as data addressed to a user himself/herself. If the transmission signal or transmission data is lost thereafter, operation is returned to the identification code determination processing.

Description

  The present invention relates to a remote control receiver that receives a radio signal transmitted from a transmitter and controls a load device.

  For example, in a remote control (RC: R / C) for operating a model car or a model airplane using radio waves, different transmitters can be used as long as the frequencies of the conventional AM signal system and FM signal system are the same. Even it was available. That is, since communication is possible if the frequency (band) of the transmitter is matched with the frequency (band) of the communication signal used by the receiver, the bands of a plurality of transmitters to be used are matched with the band of the receiver in advance. If so, I could control the receiver with one of those transmitters.

  However, in digital communication using the 2.4 GHz band, for example, a transmitter-transmitted signal (transmission data) includes a transmitter-specific identification code, and the communication signal is frequency-hopped according to the identification code. Spread spectrum by (FHSS method). In order to demodulate the target signal, the receiver side demodulates in synchronism with the hopping pattern. Therefore, before starting communication, a bind process for authenticating the transmitter and the receiver is necessary. Under such circumstances, in digital communication, the transmitter and the receiver are basically used in a 1: 1 relationship.

  On the other hand, in a remote control system that requires a binding process, Patent Document 1 discloses a remote control system that can be bound by a plurality of transmitters and a plurality of receivers.

JP 2012-166065 A

  In order to control one receiver among any of a plurality of transmitters, a binding process is required every time the transmitter is switched. In the configuration shown in Patent Document 1, a plurality of bindings are possible, but manual operation is required when switching between transmitters.

  As described above, if the binding process or the operation on the receiver side is necessary when the transmitter is replaced, it takes time when the transmitter is replaced. For example, when a driver changes in an endurance race of a model car, if the change is made using their own transmitter, a time loss occurs.

  An object of the present invention is to provide a remote control receiver that does not require a binding process or an operation on the receiver side when the transmitter is replaced.

(1) A remote control receiver of the present invention receives a transmission signal (radio wave) transmitted from a wireless transmitter and demodulates transmission data included in the transmission signal;
An identification code registration means for registering an identification code of the transmitter included in the transmission data in an identification code storage unit in a registration mode;
In normal mode, identification code determination means for determining a match between an identification code of a transmitter included in the transmission data and an identification code registered in the identification code storage unit;
Operation data processing means for outputting a control signal according to operation data included in the transmission data when the identification codes match;
In remote control receiver with
The identification code storage unit includes an area for storing a plurality of identification codes,
When the state of the mode setting switch detected immediately after turning on the power is the state of the registration mode, the identification code registration means searches the transmission signal including the transmitter identification code and is found An identification code is registered in the identification code storage unit,
The identification code determination means detects presence or absence of a matching identification code among the plurality of registered identification codes,
The present invention is characterized by comprising state control means for detecting the presence or absence of the transmission signal or the transmission data and returning the processing state to the determination by the identification code determination means if there is no (when it is lost).

(2) It is preferable that the said state control means makes the said control signal a fail safe state according to the fail safe data contained in the said transmission data.

(3) It is preferable that the identification code registration means registers an identification code in the first-in first-out method with respect to the identification code storage unit.

  According to the present invention, a remote control receiver that does not require a binding process or an operation on the receiver side when the transmitter is replaced is configured, and the transmitter can be replaced quickly.

FIG. 1 is a block diagram showing a configuration of a remote control receiver 101 according to an embodiment of the present invention. FIG. 2 is a block diagram illustrating a configuration of the transmitter 201 that communicates with the receiver 101. FIG. 3 is a conceptual diagram of an identification code storage unit provided in the RX controller 13 of the receiver shown in FIG. FIG. 4 is a flowchart showing the processing contents of the RX controller 13 of the receiver 101. FIG. 5 is a flowchart showing the processing contents of the TX controller 23 and the RF module 22 of the transmitter 201 together.

  A remote control receiver according to an embodiment of the present invention will be sequentially described with reference to the drawings.

  FIG. 1 is a block diagram showing a configuration of a remote control receiver (hereinafter simply “receiver”) 101. In FIG. 1, an RF module 12 receives a radio wave received by an antenna 11, performs reception signal search, frequency hopping synchronization, and demodulation based on data instructed by an RX controller 13. The RX controller 13 reads the demodulation result from the RF module 12 and outputs a control signal (drive signal) to the drive unit (load device such as a servo motor) according to the operation data included in the received data. Further, the RX controller 13 reads the state of the mode setting switch 14 and performs processing corresponding thereto.

  FIG. 2 is a block diagram illustrating a configuration of a transmitter 201 that communicates with the receiver 101. The display unit 24 is a display unit such as a liquid crystal panel that displays various states, and the operation unit 25 is an input device for steering and a key input device for various settings. For example, in the case of a pistol type transmitter, the operation unit 25 includes a wheel and a lever, and in the case of a stick type transmitter, a stick is included. The TX controller 23 drives the display unit 24, reads the operation amount and operation state of the operation unit 25, and sends the information to the RF module 22.

  The RF module 22 has a transmitter unique ID (transmitter identification code). The RF module 22 creates transmission data by combining the transmitter unique ID and the error detection code, performs frequency hopping modulation in accordance with the transmitter unique ID, and transmits from the antenna 21.

  The TX controller 23 generates operation data according to the operation amount or operation state of the operation unit 25, and transmits the operation data, transmission data including a transmitter unique ID (transmitter identification code) and an error detection code. It may be created and output to the RF module 22 as serial data. In this case, the RF module 22 performs frequency hopping modulation on the serial data with a pattern corresponding to the ID, and transmits it from the antenna 21.

  FIG. 3 is a conceptual diagram of an identification code storage unit provided in the RX controller 13 of the receiver shown in FIG. The identification code storage unit includes an area for registering two transmitter unique IDs (ID1, ID2). The identification code storage unit is configured by, for example, a flash memory or an EEPROM. As will be described later, if there is a transmitter unique ID included in the received data and an ID that matches the two registered IDs, the receiver 101 treats the received data as data for itself. I do.

  FIG. 4 is a flowchart showing the processing contents of the RX controller 13 of the receiver 101. The procedure shown in this flowchart is executed when the power is turned on. Immediately after the power is turned on, first, the state of the mode setting switch is read, and if the mode is set, the LED starts blinking, thereby indicating the state of waiting for the BIND code (S1 → S2). Thereafter, it waits for a BIND code to be transmitted from the transmitter. The signal transmitted from the transmitter is frequency hopped, but is searched with a predetermined standby frequency hopping pattern. If there is a carrier in a certain frequency channel, the code is demodulated and included in the code. It is determined from the information whether or not it is a BIND code (S3 → S4 → S5 → S3 loop).

  For example, if the BIND code cannot be received even after 10 seconds have elapsed, the LED is turned off and the operation proceeds to the normal mode operation described later (S5 → S8 → S9).

  If the mode setting switch is in the normal state when the power is turned on, the operation proceeds to the normal mode operation described later (S1 → S9).

  If the BIND code is received, the transmitter unique ID included in the BIND code is registered in the identification code storage unit (S4 → S6). Then, the fact that the registration is completed is displayed by blinking the LED at a high speed for a certain time (S7). At this time, the two transmitter unique IDs (ID1, ID2) are written to the area to be registered by the first-in first-out method (FIFO method). As a result, up to two new transmitter unique IDs are always held.

  If the mode setting switch is in the normal state after completion of the binding process or when the power is turned on, the transmission signal from the transmitter is searched with a predetermined standby hopping pattern, and if there is a carrier in a certain frequency channel, The code is demodulated, and it waits for the transmitter unique ID included in the code to match one of the two IDs registered in the identification code storage unit (S9 → S10 → S9). If they match, demodulation is performed in synchronization with frequency hopping thereafter (S10 → S11). That is, since the signal transmitted from the transmitter is frequency hopped in a pattern according to the transmitter unique ID, the reception channel is sequentially switched to be received so as to follow the pattern.

  Thereafter, a signal corresponding to the operation data included in the demodulated data is output to the drive unit 15 (see FIG. 1) (S12 → S13).

  If the reception signal cannot be received or the demodulation fails, the timer is started. If the state continues for a certain time (the transmission signal is lost), a fail-safe operation is performed (S12 → S14 → S15). . Thereafter, the process returns to step S9 (S9 → S10 → S9). The operation data in the transmission data includes fail-safe operation data to be performed when the signal is lost. Here, a signal corresponding to the fail-safe operation data immediately before the signal is lost is output to the drive unit 15 (see FIG. 1). For example, in the case of a model car, it may be set to stop traveling as it is.

  When switching the transmitter to be used, first, the first transmitter that has been used is turned off, and the second transmitter that has been BIND processed is turned on. Thereby, in step S9, the signal transmitted from the second transmitter is successfully received and demodulated. Subsequent processing is the same as described above.

  FIG. 5 is a flowchart showing the processing contents of the TX controller 23 and the RF module 22 of the transmitter 201 together. First, the TX controller 23 reads the state of the operation unit 25 (see FIG. 1), and creates operation data of a predetermined number of bytes according to the operation amount and operation state of the operation unit 25 (S21 → S22). Then, this operation data is output to the RF module 22. The RF module 22 creates transmission data including this operation data, transmitter unique ID (transmitter identification code), and error detection code, and transmits them (S23 → S24).

  The TX controller 23 of the transmitter 201 repeats the above processing at a predetermined cycle.

  With the configuration described above, when the BIND process is performed on two transmitters in advance and the transmitter to be used is switched, the first transmitter used is first turned off and the second transmitter is transmitted. Just turn on the machine. Alternatively, the second transmitter may be turned on before turning off the first transmitter, and then the first transmitter may be turned off. Even in such a case, immediately after the transmission signal from the first transmitter can no longer be received and demodulated, the search for the transmission signal from the second transmitter succeeds, so the second transmitter should take over immediately. Can do.

  Since the transmitter unique ID written in the identification code storage unit is updated by a first-in first-out method, the old transmitter unique ID can be erased by repeating the operation of registering a new transmitter unique ID. The operation at the transmitter can be substantially prohibited.

  In the embodiment described above, two transmitter unique IDs are registered. However, three or more transmitter unique IDs may be registered.

  In the embodiment described above, an example of performing communication using the frequency hopping method (FHSS method) has been described, but the present invention can be similarly applied to communication using the direct spreading method (DSSS method). In the case of the DSSS system, a pseudo noise code (PN code) corresponding to the transmitter unique ID is generated and modulated. The receiver generates and demodulates a pseudo noise code corresponding to the transmitter unique ID. In the case of the DSSS system, when a BIND code is received, it is possible to wait at a fixed frequency instead of searching with a predetermined standby frequency hopping pattern.

  As described above, the present invention can register a plurality of transmitter unique IDs, and can quickly take over a transmitter without turning off the receiver or performing a BIND process.

DESCRIPTION OF SYMBOLS 11 ... Antenna 12 ... RF module 13 ... RX controller 14 ... Mode setting switch 15 ... Drive part 21 ... Antenna 22 ... RF module 23 ... TX controller 24 ... Display part 25 ... Operation part 101 ... Remote control receiver 201 ... Transmitter

Claims (3)

Data demodulation means for receiving a transmission signal transmitted from a wireless transmitter and demodulating transmission data contained in the transmission signal;
An identification code registration means for registering an identification code of the transmitter included in the transmission data in an identification code storage unit in a registration mode;
In normal mode, identification code determination means for determining a match between an identification code of a transmitter included in the transmission data and an identification code registered in the identification code storage unit;
Operation data processing means for outputting a control signal according to operation data included in the transmission data when the identification codes match;
In remote control receiver with
The identification code storage unit includes an area for storing a plurality of identification codes,
When the state of the mode setting switch detected immediately after turning on the power is the state of the registration mode, the identification code registration means searches the transmission signal including the transmitter identification code and is found An identification code is registered in the identification code storage unit,
The identification code determination means detects presence or absence of a matching identification code among the plurality of registered identification codes,
A remote control receiver comprising: a state control unit that detects the presence or absence of the transmission signal or the transmission data, and if not, returns a processing state to the determination by the identification code determination unit.   The remote control receiver according to claim 1, wherein the state control unit sets the control signal in a fail-safe state according to fail-safe data included in the transmission data.   The remote control receiver according to claim 1, wherein the identification code registering unit registers the identification code in a first-in first-out manner with respect to the identification code storage unit.

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