JPH0711036U - Infrared signal receiver - Google Patents

Abstract

(57) [Abstract] [Purpose] Infrared light for outdoor use, which can be used as a general-purpose infrared light receiving module used for receiving device of remote control device by indoor infrared signal, for receiving device of outdoor remote control device. Provided is a signal receiving device and an infrared signal receiving device capable of receiving an infrared signal from the entire circumference of 360 ° in the horizontal direction and from above or below. [Structure] A light receiving unit of a general-purpose infrared receiving module used in a receiving device of a remote control device using infrared rays is shielded by a light attenuator, and at least three or more are arranged on the circumference to serve as a signal processing unit. And a predetermined signal processing is performed. In addition, the infrared light receiving modules arranged on the circumference are arranged so as to be inclined at a predetermined elevation angle or depression angle.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiver of a remote control device using an infrared signal, and more particularly to a receiver of a remote control device using an infrared signal that can be used outdoors where the light beam is stronger than indoors.

[0002]

[Prior art]

 Conventionally, a remote control device has been realized for controlling ON / OFF of a power source by using an infrared signal from a remote position of an electric device used indoors such as a television or a video. . A remote control device using such an infrared signal is composed of an infrared signal transmitting device and a receiving device incorporated in an electric device or the like for receiving the infrared signal transmitted from the transmitting device.

FIG. 10 is a schematic diagram showing the infrared signal receiving apparatus used by being incorporated in an electric device such as a television or a video. The infrared signal receiving device 1 includes a light receiving module 2 for receiving a modularized infrared ray, and a visible light for cutting visible light other than the infrared signal light on the front surface of the light receiving module 2 as much as possible. A cut filter 3 is provided, and such an infrared signal receiving device 1 is incorporated in an electric device 4 such as a television or a video.

FIG. 11 is a diagram showing an internal configuration of an infrared light receiving module 2 incorporated in the infrared signal receiving device 1. In the figure, the light receiving module 2 is a PIN photodiode 5 for receiving infrared signal light, a resonance circuit 6 for extracting a signal frequency received by the PIN photodiode 5, and a resonance circuit 6 for extracting the signal frequency. An amplifier 7 for amplifying the signal frequency, a limiter level shift 8 for determining the voltage level of the signal wave amplified by this amplifier 7, a peak detection circuit 9 for extracting the signal wave, and an output waveform shaping It has an output waveform shaping circuit 10 and the like, and is composed of an automatic balance level control (ABLC) 11 for adjusting the amount of received light and capacitors 12a and 12b. In this case, in order to prevent inverter noise and the like of the fluorescent lamp, the IC inside the thick line frame is formed.

[0005]

[Problems to be solved by the device]

 Such an infrared signal receiving device 1 is configured to be used indoors. Therefore, when a light ray exceeding the indoor normal light amount of 100 to 500 lux (lx) enters, the sensitivity of the device is reduced. It becomes poor or completely unreceivable. This is because the amplifier 7 used in the infrared ray receiving module 2 receives a strong outdoor sun ray and is saturated by the direct current flowing from the PIN photodiode 5. Therefore, even if the infrared ray receiving device 1 configured for indoor use is directly incorporated into a device or the like used outdoors, it will not operate normally.

Further, since the infrared signal receiving apparatus 1 is used for an electric device or the like which is generally installed and used indoors such as a television or a video as described above, Only the signal light transmitted from a narrow angle range orthogonal to the signal receiving device 1 can be received, and the light receiving angle is narrow, and the signal light transmitted from the side, for example, cannot be received.

For this reason, various devices that are used outdoors under external light and that move one or both of the data transmitting side and the data receiving side, such as remote control equipment for construction work, etc. Currently, it is difficult to use infrared signals as a device, and normally, wireless is used as an outdoor remote control device. However, the remote control device using this radio has the disadvantage that both the transmitter and the receiver are expensive and the cost is high.

On the other hand, the remote control device using an infrared signal for remote control of the above-mentioned household electric appliances and the like, in particular, the infrared light receiving module 2 having a modularized infrared light receiving function is inexpensive. However, if this can be used as a receiving device for a remote control device outdoors, it can be an inexpensive remote control device for outdoor use.

The present invention was devised in view of such circumstances, and a general-purpose infrared light receiving module used in a receiver of a remote control device for infrared signals, which is supposed to be used indoors. , Infrared signal receiver capable of receiving infrared signal that can be used as a receiver for outdoor remote control device and capable of receiving infrared signal all around 360 ° in the horizontal direction outdoors The purpose is to provide.

It is another object of the present invention to provide an infrared signal receiving device capable of receiving the entire circumference in the horizontal direction outdoors and also receiving an infrared signal transmitted from above or below.

[0011]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention identifies a PIN photo diode for receiving an infrared signal used in a receiver of a remote control device using an infrared signal and an infrared signal received by the PIN photodiode. A resonance circuit for selecting only the frequency, an amplifier for amplifying the received signal selected by this resonance circuit, a limiter level shift for determining the voltage level, and a peak detection circuit for extracting the signal wave. An infrared signal receiving device as an outdoor remote control device using a general-purpose infrared light receiving module equipped with an output waveform shaping circuit for shaping an output waveform, wherein the light receiving part of the infrared light receiving module is In addition to blocking the incident light entering the light-receiving part with an attenuator to reduce it to the indoor light level, At least three or more of the infrared ray receiving modules shielded by the optical body are arranged on the circumference, and the signal processing section receives the received signals processed and processed by the infrared ray receiving modules thus arranged and predetermined by the signal processing section. The signal processing is performed.

Further, a plurality of light receiving modules according to claim 1 arranged on the circumference are arranged so as to be tilted at a predetermined elevation angle or tilted at a predetermined depression angle.

[0013]

[Work]

 The operation of the present invention is as follows. The strong light rays outdoors are attenuated by the light reducer to an indoor light ray level of about 100 to 500 lux (lx) and reach the infrared light receiving module. Therefore, the amplifier in the infrared light receiving module is not saturated, and as a result, the infrared light receiving module configured for indoor use can be used as the receiving device of the remote control device using the infrared signal for outdoor use. Like

In addition, by arranging a plurality of such infrared ray receiving modules on the circumference and arranging each of the light receiving modules at a predetermined elevation angle or depression angle, the horizontal direction 360 can be obtained. It is also possible to receive the transmission signals from all directions around and above or below.

[0015]

【Example】

 A first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of an infrared signal receiving apparatus 13 in the first embodiment, and FIG. 2 is a partial perspective view. In this figure, in this embodiment, as shown in FIG. 3, the incident light is lit at the indoor level on the light receiving surface of the general-purpose infrared ray receiving module 2 used in the remote control device such as the indoor electric equipment. Attenuator 14 for attenuating is additionally provided, and four infrared ray receiving modules 2 are arranged on the circumference C in this embodiment as shown in FIG.

That is, in this embodiment, as shown in FIGS. 1 and 2, the infrared ray receiving modules 2a, 2b, 2c, 2d provided with the light attenuator 14 are provided on the circumference C for 90 °. Four are arranged at intervals. At least three pieces should be arranged to receive infrared signals from all directions. The infrared ray receiving modules 2a, 2b, 2c, 2d arranged on the circumference are surrounded by the visible light cut filter 3 which is a device casing. The visible light cut filter 3 may be directly attached to the light receiving surface of the infrared light receiving module 2 to which the light attenuator 14 is attached.

Further, a signal processing unit 17 (not shown, see FIG. 6) in which a central processing unit (CPU) or the like is mounted on a substrate is arranged at an arbitrary position in the device casing, and receives the signal. Performs signal processing and output of control data to the controlled device. The signal processing unit 17 will be described later.

The light attenuator 14 attenuates external light (sunlight) entering the infrared ray receiving modules 2a to 2d at a constant rate. In this embodiment, a transparent plastic plate as a substrate is used. Although an appropriate amount of carbon particles as a light-reducing substance is applied, the application is not limited to such application of carbon particles, and it is possible to attenuate external light and to obtain black, etc., whose transmittance becomes a predetermined ratio described later. You may make it apply the paint. Further, glass may be used for the substrate.

The transmittance, that is, the ratio of the external light component that passes through the light attenuator 14 is determined as follows. The external light incident on the dimmer 14 is 1, the ray reflected by the dimmer 14 is ρ, the ray absorbed by the dimmer 14 is α, and the ray transmitted through the dimmer 14 is Let τ be ρ + α + τ = 1 from the energy conservation law. Therefore, the ratio of the transmitted light to the incident light, that is, the transmittance is τ / (ρ + α + τ). By the way, the amount of light ρ reflected by the light attenuator 14 changes depending on the physical properties of the light attenuating material and surface treatment (smooth or rough, and presence or absence of coating), and is absorbed by the light attenuator 14. The amount of the emitted light α varies depending on the physical properties and thickness of the light-reducing substance.

The light-reducing body 14 coated with such a light-reducing substance shields the light-receiving surfaces of the infrared ray receiving modules 2a to 2d. For example, the operating illuminance of the infrared ray receiving modules 2a to 2d is 300 lux, and If the illuminance is 10 ⁴ lux, the transmittance P of external light necessary for the infrared light receiving module 2 to operate properly without being saturated is P = 300/10 ⁴ = 0.03. Similarly, when the illuminance of external light is 10 ⁵ , P = 300/10 ⁵ = 0.003. The attenuator 14 is prepared by coating carbon particles so as to have such a transmittance of external light, and shields the light receiving surfaces of the infrared light receiving modules 2a to 2d.

The infrared signal reception device 13 configured as described above is mounted as a controlled device, for example, as a reception device of a construction work vehicle or the like. Taking the case of remote control of this construction vehicle as an example, ON / OFF switching of engine start, stop, forward running, reverse running, etc. will be performed by remote control.

FIG. 4 is a block diagram showing the configuration of an infrared signal transmitter 15 for transmitting data to the infrared signal receiver 13. The infrared signal transmitting device 15 is a keyboard 15a for operating a controlled device such as the construction vehicle and for inputting various data, a memory 15b for storing a system program, a central processing unit (CPU). ) To send a data code to be sent based on a system program stored in the memory 15b and to control each part of the device, a one-shot multi 15d described later, for supplying current Driver 15e, and an infrared light emitting diode 15f for transmitting transmission data as an infrared signal by a current supplied from the driver 15e.

Since the transmitter 15 is used outdoors, the transmission signal sent from the controller 15c is changed in duty ratio by the one-shot multi 15d, and the infrared light emitting diode 15f is pulse-driven to generate a direct current. The light emitting power is larger than that of light emitting. Further, by increasing the number of infrared light emitting diodes 15f as necessary, a larger light emitting power can be obtained.

FIG. 5 shows a format of data transmitted from the transmitter 15. First, the leader code with the ON state for 9 ms (milliseconds) and the OFF state for 4.5 ms is located at the beginning. This reader code makes the infrared signal receiving device 13 (see FIG. 2 etc.) recognize the data transmission. In the infrared signal receiving device 13, as will be described later, the infrared signal receiving device 13 continuously performs four times at intervals of 1.95 ms. Then, when this reader code is received, the data transmission is recognized and the reception process is started, but if it cannot be received four times in a row, it is ignored as if there was a single reaction due to some optical or electromagnetic noise. To do.

Next to this leader code, there is an 8-bit data code whose ON state is “1” and OFF state is “0”, and then this data code is ON, OFF, that is, 1, 0. The 8-bit data for error detection, which is the inverted version, is located, and finally the stop bit for signaling the end of data transmission is located.

The transmitting device 15 transmits such predetermined data to be transmitted at 100 ms intervals, and the infrared signal (A in the figure, for example) is received by the light receiving module 2 b of the infrared signal receiving device 13 shown in FIG. The data code is received and data processing is performed, but even if the transmitter 15 comes to the front of the light receiving module other than the light receiving module 2b due to the movement of the transmitting side or the receiving side, an infrared signal In the receiving device 13 of the above, since the light receiving module from which data is received is determined in 100 ms units and switching is performed, there is no omission in data transfer. This point will be described later.

As described above, the data received by each of the light receiving modules 2a, 2b, 2c, 2d is output to the signal processing unit 17 shown in FIG. 6 and the required data processing is performed. The signal processing unit 17 has an interface 17a for inputting the respective data from the respective light receiving modules 2a, 2b, 2c, 2d and a central processing unit (CPU), and performs the data receiving process and the data receiving process. A control unit 17b that performs data processing for device control based on the received data, a memory 17c that stores a control program for this control unit 17b, and an interface that outputs data to the controlled device 16. The processed data is output to the controlled device 16 such as the construction vehicle as control data for driving a drive motor, for example.

The operation of the infrared signal receiving apparatus 13 configured as above will be described with reference to the flow chart shown in FIG. First, a predetermined key of the keyboard 15a is operated with the infrared signal transmitting device 15 shown in FIG. 4 facing the infrared signal receiving device 13 mounted on the controlled device 16. As a result, according to the system program stored in the memory 15b, the control unit 15c transmits the data format shown in FIG. 5 as an infrared signal by causing the infrared light emitting diode 15f to emit light through the one-shot multi 15d and the driver 15e.

The transmitted infrared signal is received by the infrared signal receiving device 13 mounted on the controlled device 16. In this case, the strong external light is cut by the visible light cut filter 3, and further reduced by the light attenuator 14 to the light amount of the indoor light level and reaches any of the infrared ray receiving modules 2a, 2b, 2c, 2d. To do. Since the infrared ray receiving modules 2a, 2b, 2c, 2d are arranged at intervals of 90 ° on the circumference as described above, the infrared ray signals are leaked regardless of the direction of 360 ° on the horizontal plane. It can be received without any problems.

The infrared signal receiving device 13 receives the infrared signal after initial setting such as resetting of the device is performed in advance (step S 1). Since this data transmission is an asynchronous communication in which it is unknown from which direction and when it is transmitted, the control unit 17b simultaneously monitors the respective light receiving modules 2a, 2b, 2c, 2d, and the reader code (see FIG. 5). The receiving process is performed on the light receiving module that has detected. An infrared signal is received with a weight of 95 ms (steps S2 and S3). That is, the transmission data is transmitted in the format shown in Fig. 5 as described above, but on the receiving side, when the reader code of this data format is received four times continuously at 1.95 ms intervals. In step S4, it is determined that a valid signal has been received, and data reception processing is performed (step S5). If the reader code is not received four times consecutively at 1.95 ms intervals, it is due to optical or electromagnetic noise, and it is judged that legitimate data has not been received and the data reception process is started. No

Further, as shown in FIG. 2, the transmitted infrared signal enters the respective light-receiving surfaces at an angle of 45 ° from, for example, an intermediate portion between the light-receiving module 2b and the light-receiving module 2a (B in the figure). , C), when both of the light receiving modules are recognized, the receiving process is performed by authenticating one of the input signals based on the control of the control unit 17b.

As described above, the reception processing is performed on the transmission signal in which the leader code is received four times continuously at the interval of 1.95 ms, and when the error detection processing is invalid, the reception data is After being discarded (step S8) and returning to the step S2, if it is determined to be valid (step S5), the control unit 17b performs the required data processing, and the construction work vehicle or the like via the interface 17d. Is output to the controlled device 16 as a control signal for forward operation (step S7). As a result, the controlled device 16 is controlled and, for example, forward drive is performed.

As described above, the transmitting device 15 (see FIG. 4) transmits the control signal at 100 ms intervals, and by sequentially transmitting various control data to the controlled device 16, the outdoor device can be For example, it becomes possible to remotely control the controlled device 16 such as the construction vehicle by an infrared signal.

Next, a second embodiment will be described with reference to FIG. In the second embodiment, the light receiving surfaces of the infrared light receiving modules 2a, 2b, 2c, 2d in the first embodiment are arranged with an elevation angle of about 45 ° with respect to the horizontal direction. By arranging the infrared ray receiving modules 2a, 2b, 2c, 2d in this way, in addition to 360 ° in the horizontal direction, 0 ° to 90 ° in the vertical direction, that is, a transmission signal from the upper side can be received, and the hemisphere surface can be received. The infrared signal receiving device 18 capable of receiving the Other configurations and operations are the same as those in the first embodiment.

In the second embodiment, a case where a vibration trench roller (not shown) for compacting a deep groove of a road excavated for burying water and sewerage, a gas pipe, etc. is remotely controlled, etc. It is suitable for use in. When remotely controlling the vibration trench roller as the controlled device, ON / OFF switching of engine start, stop, front wheel vibration, rear wheel vibration, forward traveling, backward traveling, etc. must be performed by remote control. become.

Next, a third embodiment will be described with reference to FIG. In the third embodiment, the light receiving surfaces of the infrared light receiving modules 2a, 2b, 2c, 2d in the first embodiment are arranged so as to be inclined at a depression angle of about 45 ° with respect to the horizontal direction. FIG. 9 is shown in a perspective view from below. By arranging the infrared ray receiving modules 2a, 2b, 2c, 2d in this manner, in addition to 360 ° in the horizontal direction, minus 0 ° to 90 ° in the vertical direction, that is, it becomes possible to receive a transmission signal from below. It is possible to use an infrared signal receiving device 19 capable of receiving light on a hemisphere. Other configurations and operations are similar to those of the first embodiment. The third embodiment is suitable for use in the case of remotely controlling an aerial work equipment or the like at a construction site from the ground.

In addition, if the second and third embodiments are combined, an infrared signal receiving device capable of receiving infrared signals from all directions above and below 360 ° in addition to the entire circumference of 360 °. Can be

[0038]

[Effect of device]

 As described above, according to the present invention, the general-purpose infrared ray receiving module used in the receiving device of the remote control device by the infrared ray signal, which is supposed to be used indoors, can be used as an outdoor remote controller. A remote control device that can be used as a receiver for a control device and that can receive an infrared signal over the entire 360 ° horizontal direction and can be manufactured at low cost. Infrared signal receiver.

Further, it is possible to provide a remote control red line signal receiving device capable of receiving the entire circumference in the horizontal direction outdoors and also receiving an infrared signal transmitted from above or below.

[Brief description of drawings]

FIG. 1 is a plan view of an infrared signal receiving apparatus according to a first embodiment.

FIG. 2 is a partial perspective view of an infrared signal receiving apparatus according to the first embodiment.

FIG. 3 is a principle explanatory diagram in which a light attenuator is attached to a light receiving surface of a general-purpose infrared signal light receiving module used in a remote control device such as an indoor electric device.

FIG. 4 is a configuration block diagram of an infrared signal transmission device for transmitting data to an infrared signal reception device.

FIG. 5 is a diagram showing a format format of data transmitted from a transmission device.

FIG. 6 is a block diagram showing a configuration of a data processing unit.

FIG. 7 is a flow chart for explaining the operation of the present invention.

FIG. 8 is a perspective view showing a configuration of an infrared signal receiving apparatus according to a second embodiment.

FIG. 9 is a perspective view showing the configuration of an infrared signal receiving device according to a third embodiment from below.

FIG. 10 is a diagram showing a configuration of a general-purpose infrared light receiving module.

FIG. 11 is a diagram showing an outline of an infrared signal receiving apparatus used by being incorporated into an electric device or the like such as a television or a video in the related art.

[Explanation of symbols]

 1 ... Infrared signal receiving device 2a, 2b, 2c, 2d-Infrared signal receiving module 4 ... Electrical equipment 5 ... PIN photodiode 7 ... Amplifier 13 ... Infrared signal receiving device 14 ... Attenuator 15 ・ ・ Infrared signal transmitter 15f ・ Infrared light emitting diode 16 ・ ・ Controlled device (vibration trench roller) 17 ・ ・ Signal processing unit 17b ・ Control unit 17c ・ Memory 17d ・ Interface 18 ・ ・ Infrared signal reception Device 19 ... Infrared signal receiving device

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Claims (3)

[Scope of utility model registration request] 1. A PIN photodiode for receiving an infrared signal used in a receiver of a remote control device using an infrared signal, and a resonance circuit for selecting only a specific frequency from the infrared signal received by the PIN photodiode. And an amplifier for amplifying the received signal selected by this resonance circuit, a limiter level shift for determining the voltage level, a peak detection circuit for extracting the signal wave, and an output waveform shaping circuit for shaping the output waveform An infrared signal receiving device as an outdoor remote control device using a general-purpose infrared light receiving module comprising, such as a light receiving portion of the infrared light receiving module, the incident light entering the light receiving portion to the indoor light level The infrared receiver is shielded by a light attenuator for dimming and is also shielded by the light attenuator. At least three modules are arranged on the circumference of the circumference, and the signal processing unit receives the received signal processed by the infrared light receiving module thus arranged and performs a predetermined signal processing in the signal processing unit. Infrared signal receiver. 2. The infrared signal receiving apparatus according to claim 1, wherein the infrared light receiving modules arranged on the circumference are respectively inclined at a predetermined elevation angle. 3. The infrared signal receiving apparatus according to claim 1, wherein the infrared light receiving modules arranged on the circumference are arranged so as to be inclined at a predetermined depression angle.