JPH11238193A - Data communication method and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable one receiver to manage data from transmitters, receiver by receiver, by allowing the receiver to receive carriers from respective transmitters and then distribute and process the received data for every transmitter based on the data for identification. SOLUTION: The respective transmitters 1 send the data individually with radio waves of the same frequency and the receiver 2 receives the carriers from the transmitters 1. The receiver 2 classifies the data from the respective transmitters 1 mixed in the received carriers for every transmitter 1 through a multiplexing decoder 3 provided on the side of the receiver 2, distributes the receive data for every transmitter 1, and checks the data. Tilt sensors 4 are provided on the sides of the transmitters 1 and abnormality of the attitude of a worker who carries a transmitter 1 and works in a common ditch, a tunnel, a building, etc., is detected as an abnormal tilt of the transmitter 1 on the side of the receiver 2 at the remote place according to data from the tilt sensor 4 to specify the worker on the side of the receiver 2 and generates an alarm.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data communication method and apparatus for performing data communication between a plurality of transmitters and at least one receiver.

[0002]

2. Description of the Related Art Conventionally, as a method or an apparatus for performing data communication between a plurality of transmitters and one receiver, each transmitter performs transmission using a carrier having a different frequency, and
It is known that a receiver receives carrier waves of different frequencies from a transmitter and performs data management for each transmitter.

[0003]

However, in the above-mentioned method, a plurality of receiving units for receiving a plurality of carriers having different frequencies (for tuning to a plurality of frequencies) or a plurality of receiving units for receiving a plurality of carriers having different frequencies are used in the above method. A filter for separating the carrier is required, which complicates the structure of the receiver. In particular, in the case of using a filter, the output value of the received wave (carrier) is greatly reduced, so that stable data communication is performed. There is a disadvantage that it may be difficult to do so.

Also, a transmitter needs a plurality of transmission tuners such as crystals to output different carrier waves.
There is also a problem that the structure of the transmitter is complicated. For this reason, the present invention provides a data communication method and apparatus for receiving data transmitted from a plurality of transmitters by a carrier wave of only one frequency, sorting the received data into received data for each transmitter, and processing the data. It is an issue.

[0005]

According to the present invention, there is provided a data communication method comprising: a plurality of transmitters for transmitting data by using a carrier wave having a predetermined frequency;
In a data communication method for transmitting and receiving data to and from at least one receiver 2 that receives a carrier from a transmitter, each transmitter 1 modulates data to be transmitted on a carrier of the same frequency and The receiver 2 is characterized in that the receiver 2 receives a carrier wave from each of the transmitters 1 and distributes and processes the received data for each of the transmitters 1 based on identification data.

Further, the data communication apparatus of the present invention comprises a plurality of transmitters 1 for transmitting data using a carrier wave of a predetermined frequency.
And at least one receiver 2 for receiving a carrier wave from the transmitter 1, wherein the data to be transmitted that each of the transmitters 1 has on each transmitter 1 side is transmitted on a carrier wave of the same frequency. A device that modulates and transmits at a different cycle for each transmitter 1, and the receiver 2 is
And a device that receives a carrier wave of the only frequency transmitted from, and sorts and processes the received data into the received data for each transmitter 1 based on the identification data provided on the transmission data side or the receiver 2 side. This is the first feature.

[0007] Further, the receiver 2 is an alarm device that sorts predetermined data transmitted from the transmitter 1 for each transmitter 1 and generates an alarm corresponding to each transmitter 1 based on the data. A second feature is that a sensor for alarm basic data, which is data for generating the alarm, is provided on the machine 1 side.

A third feature is that the sensor is an inclination sensor 4 for detecting the amount of inclination of the alarm target.

In addition, the transmitter 1 outputs an A / D converter 31 for digitizing the output of the inclination sensor 4 and a predetermined data group by processing the output from the A / D converter 31 and predetermined internal data. A transmission signal processing device 8 and a radio transmission device 9 that modulates a data group output from the transmission signal processing device 8 on a carrier wave of a predetermined frequency at a predetermined cycle set for each transmitter 1 and transmits the modulated data. The transmission signal processing device 8 processes the output from the A / D converter 31 into alarm basic data indicating the amount of inclination of the alarm target or the abnormal inclination of the alarm target that requires an alarm, A device that generates identification data for data distribution on the side, generates a data group including the identification data and the alarm basic data, and serially outputs the data group. It is characterized of.

The receiver 2 converts the data group contained in the carrier wave received by the radio receiving device 42 into a radio receiving device 42 for receiving a carrier wave of only one frequency, and converts the data group into identification data. Signal processing device 43 which sorts and outputs each transmitter 1 based on the
A fifth feature is that the apparatus is provided with an alarm generation device that generates an alarm by sound or light emission according to the output from the reception signal processing device 43.

[0011]

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a conceptual diagram of an information communication apparatus according to the present invention, in which a plurality (n) of transmitters 1 transmit radio waves (carrier waves) of the same frequency (130 MHz in the present embodiment) for each transmitter 1. And the receiver 2 transmits the carrier (130 MH) from each transmitter 1.
z) is received, and the data from each of the transmitters 1 included in the received carrier is mixed (separated) for each of the transmitters 1 through the multiplex decoder 3 provided on the receiver 2 side.
Then, the data is distributed to the received data of each transmitter 1 and the data is checked (processed).

In this embodiment, a tilt sensor 4 described later is provided on the transmitter 1 side, and as shown in FIG. 2, the transmitter 1 for carrying out work in a common ditch, a tunnel, a building, a clean room, or the like is carried. The transmitter 1 or the remote receiver 2 detects an abnormal posture of the worker 6 (for example, when it suddenly falls down) as an abnormal inclination of the transmitter 1 based on data from the inclination sensor 4, and the receiver 1 An example of the transmitter 1 on the two sides, that is, an emergency alarm device that identifies an operator and notifies the operator of an abnormality is described.

In this embodiment, the data control procedure between the transmitter and the receiver is a conventionally known high-level data link control procedure (HDLC), and information (such as data resulting from the tilt sensor 4) on the transmitter 1 side is used. Data) is a flag sequence, that is, a transmitter 1 to be transmitted / received in one frame in frame units whose both ends are surrounded by a hexadecimal 7E code.
Side information is included) transmitted and received. Then, a cyclic check or the like is performed as a communication error check, and the validity of the received frame is checked.

Next, the structure of the transmitter 1 will be described. The transmitter 1 in the present embodiment is shown in FIGS.
4, an inclination sensor 4 for detecting the inclination of the transmitter 1 as shown in FIG. 4, and a station number for setting an ID number (station number ID) unique to each transmitter 1. A setting switch 7; a transmission signal processor 8 to which data from the above and below various switches and the inclination sensor 4 are input; a wireless transmitter 9 for carrier wave transmission; a buzzer 11 for alarm; a power supply 12; Etc. are provided.

The transmitter 1 can be mounted on the waist belt of the worker 6 by a belt clip 14 as shown in FIG. 1C and a belt clip holder 16 provided on the back side of the transmitter 1. It is configured to be able to. The power source 12 of the transmitter 1 is a 006P battery or the like, and can be replaced by removing a battery replacement cover 17 on the rear surface 1b of the transmitter. When the power switch 13 arranged on the front side 1a is turned on, the power source 12 is turned on. Power is supplied to the transmitter 1 and the transmitter 1 starts up.

In this embodiment, the inclination sensor 4
Are piezoelectric ceramics 18a and 18 as shown in FIG.
b, 18c equipped with a sound piece type (triangular prism) gyro 18,
As shown in FIG. 6, the displacement sensor has a structure connected to an operation amplifier 19, a transmitter 21, a phase compensator 22, a synchronous detector 23, a DC amplifier 24, and the like.
Is tilted to the left (piezoelectric ceramic 18a side), so that + voltage corresponding to the tilt angle is increased to the right (piezoelectric ceramic 18b
By tilting the gyro 18 to the side, a voltage corresponding to the tilt angle is output from the DC amplifier 24 so that the tilt angle of the gyro 18 can be measured.

The tilt sensor 4 (gyro 18)
Is provided in the transmitter 1, and the transmitter 1 is provided with the gyro 18
The tilt angle of the transmitter 1 can be measured by the transmitter 1 itself, and based on the tilt angle information (data) of the transmitter 1 (operator 6) measured by the tilt sensor 4, the worker 6 The transmitter 1 or the receiver 2 determines that the worker 6 has an abnormal posture by continuing the inclination of the angle exceeding a predetermined set angle (warning angle) for a predetermined set time (detection time). It has become.

An angle teaching switch 26 for setting the warning angle arbitrarily or stepwise and a detection time setting switch 27 for setting the detection time arbitrarily or stepwise are connected to the transmitter 1 (transmission signal processing device 8). In order to set the position of the gyro 18 at the start of the measurement of the inclination angle as the reference position (the gyro 18 is not rotating and the inclination of the transmitter 1 is 0), the gyro 1 at the start of the measurement is used.
8 (mercury reed switch) which is set based on the output of 8 and a switch (HELP-CALL) for the operator 6 to arbitrarily output trouble alarm information (data).
A switch 29 (see FIG. 1) is also connected to the transmission signal processing device 8 and provided on the transmitter 1 side.

As shown in FIG. 7, the transmitter 1 first transmits measurement data from the inclination sensor 4 to the A / D converter 3.
The data is digitized via the transmission signal processor 1 and taken into the transmission signal processor 8 (integrating circuit), and the transmission signal processor 8 calculates the inclination angle data of the transmitter 1 based on the reference set by the mercury reed switch 28. Then, the tilt angle data is compared with the alarm angle set by the angle teaching switch 26.

Then, it is determined whether or not the worker 6 has an abnormal posture based on the data obtained by comparison with the warning angle and the detection time set by the detection time setting switch 27.
The attitude flag data (an abnormal flag in the case of an abnormal attitude and other normal flags) according to the determination is sent to a frame check signal calculator (FC) provided in the transmission signal processing device 8 side.
(S computing unit) 32 and the multiplexer 33 side.

The transmission signal processor 8 also inputs the tilt angle data and the station number ID (data) set by the station number setting switch 7 to the FCS calculator 32 and the multiplexer 33.
A flag sequence required for DLC, a frame header for establishing synchronization at the time of transmission / reception, FCS data calculated by the FCS calculator 32, and O of the HELP-CALL switch 29
Emergency flag data generated by N and OFF (consisting of an emergency flag when the HELP-CALL switch 29 is ON and a normal flag when the HELP-CALL switch 29 is OFF) is also input.

Then, the multiplexer 33 generates an alarm corresponding to each transmitter 1 on the receiver 2 side, including the inclination angle data (inclination amount) of the transmitter 1, the attitude flag data, the emergency flag data, and the like. The communication data (frame) consisting of alarm basic data, station number ID data, frame check code for error check (cyclic check, etc.), flag sequence, header code, etc., is generated as parallel digital data and output. I do.

A parallel / serial converter (D / D converter) 3 provided on the transmission signal processing device 8 side
4, the output (communication data) from the multiplexer 33, the transmission clock from the baud rate (modulation rate) generator 36, the transmission interval data of the frame from the communication interval timer 37 and the random number generator 38, and the like are inputted. Converter 3
4 and the transmission interval data are input to the wireless transmission device 9 so that the wireless transmission device 9 continuously converts the frames in units of frames to a predetermined frequency (130 in the present embodiment).
MHz) and transmitted at a predetermined constant cycle.

At this time, the baud rate generator 36, the communication interval timer 37, and the random number generator 38 are generated by a reference clock for generating a clock for internal calculation, the transmission interval data is differentiated in timing, and the transmission clock is directly transmitted. The data is input to the counter 39, and the output of the counter 39 is input to the multiplexer 33 to generate the predetermined data.

The frame period is changed according to the station number ID, that is, for each transmitter 1. The rise of the transmitter 1 can be confirmed by the operation of the buzzer 11 when the power is turned on. Further, the transmission signal processing device 8 can be configured as software (microcomputer type) or hardware (gate array, DSP, etc.), and can be developed relatively easily.

As described above, each of the transmitters 1 has a structure in which transmission is performed using a carrier wave of the same frequency, so that there is no need to provide a plurality of models of transmitters 1 corresponding to the carrier frequency. 9, a mechanism for generating a carrier wave of a single frequency is required, but a mechanism for generating a carrier wave of a plurality of frequencies is not required. For example, a plurality of crystals and the like are not required, and frequency management is easy. In addition, the number of parts can be reduced, and the cost can be reduced. All the transmitters 1 can be handled by one model.

In addition to the above-mentioned gyro-type, the tilt sensor 4 is a type in which a conventionally known acceleration sensor, potentiometer, angle sensor, torque balance type, capacitance type, and a weight / pendulum are linked to a magnetic / resistance conversion element. Although the inclination (posture) abnormality of the transmitter 1 (the worker 6) may be detected by using such a device, the present embodiment differs from the present embodiment except that the absolute angle of the transmitter 1 can be measured. Similarly, it is necessary to set a reference at the time of angle measurement by the mercury reed switch 28 or the like.

On the other hand, the receiver 2 of the present embodiment has a box-like outer shape as shown in FIG. 2, and a carrier (the same frequency) from each transmitter 1 through a helical antenna 41 or the like as shown in FIG. ), And a received signal processing device 4 that performs data processing of the received carrier wave, etc.
3, a communication lamp 44 corresponding to each transmitter 1 for displaying a communication state of each transmitter 1, an alarm lamp 46 provided for each transmitter 1, and a relay 47 for external output.
And an output terminal 48, an alarm angle switch 49 for setting the above-mentioned alarm angle on the receiver 2 side, a detection time switch 51 for setting the detection time, a buzzer 52 for alarm, a power switch 53 and the like.

In this embodiment, as shown in FIG. 2, an alarm monitor 46 corresponding to each transmitter 1 is provided on the front face 2a of the receiver 2 as an emergency monitor.
Communication lamp 44, alarm angle switch 49, detection time switch 5 corresponding to each transmitter 1 as a communication state monitor
1, a power switch 53 is provided, and an external output terminal 48 is provided on the bottom surface 2b of the receiver 2 as shown in FIG.
(An external lamp and an output terminal for a sound generator).

The receiver 2 includes a radio receiver 42
, A carrier (130 MHz) of a predetermined unique frequency is received, and data (frames) from each transmitter 1 included in the carrier mixed with the carrier received by the reception signal processing device 43 are individually transmitted to each transmitter 1. Based on the station number ID data, which is identification data that can be identified, sorting is performed for each transmitter 1, error checking of each frame is performed by a frame check signal or the like, and alarm basic data of a valid frame is checked. , An alarm lamp 46 corresponding to each transmitter 1 is activated, and an alarm buzzer 52 is activated (alarm is generated) to notify an abnormality of each worker 6.

More specifically, when the attitude flag data is an abnormal flag, or when the inclination angle data transmitted from each transmitter 1 and the alarm angle and detection time set by the receiver 2 are used, the worker 2 is operated on the receiver 2 side. Is activated (turns on) and activates the alarm buzzer 52 corresponding to either one or both of the cases where it is determined that the vehicle has taken the abnormal posture and the case where the emergency flag is received.

In other words, the emergency alert device of the present embodiment is capable of transmitting the abnormal posture (trouble) of the worker 6 to the transmitter 1 and the receiver 2.
The structure is such that judgment can be made on either side. As shown in FIG. 2, a worker 6 is provided on the receiver 2 side.
An alarm selection switch 54 is connected to the reception signal processing device 43 side of the receiver 2 for switching whether the abnormal posture of the receiver 2 is determined by the transmitter 1 or the receiver 2.

At this time, in the present embodiment, the alarm selection switch 54 is disposed on the front face 2a of the receiver 2. In addition, as shown in FIG.
A monitor lamp 56 at the time of N, a transmitter use switch 57 for selecting the transmitter 1 in use, a display monitor 58, 59 for the alarm angle and detection time set on the receiver 2 side, and the like are provided.

The basic principle of extracting a frame for each transmitter 1 from the received carrier will now be described. The receiver 2 receives the same frequency carrier (130 MHz in this embodiment) from a plurality of transmitters 1. However, as shown in FIG. 10A, the received carrier contains a frame F from each transmitter 1 mixed in a time-division multiplexed state. For this reason, the station number I based on the usual time division multiplexing method is used.
Each frame F can be divided (distributed) for each transmitter 1 by the D data.

For example, when transmission data (frame) F1 from a transmitter having a frame period α and transmission data (frame) 2 from a transmitter having a frame period β are received, as shown in FIG. Mixed data (carrier) of frames F1 and F2 from two transmitters are received,
According to the time division multiplexing method, the frames F1 and F2 are sorted according to the station number ID data included in each of the frames F1 and F2 while synchronizing with the synchronization signal (header code), as shown in FIG. The frame from each transmitter can be separated and specified.

On the other hand, there is a case where the frame F1 and the frame F2 interfere with each other as shown in FIG. 11 depending on the start-up timing of the transmitter (M is an interference part in the figure). However, in the present invention, since the frames are transmitted at different frame periods (α and β in FIG. 11) for each transmitter as described above, as in the case of transmitting at the same frame period, the frames are permanently transmitted after the occurrence of the interference frame. There is no interference of the frames, and even after the occurrence of the interference frame, the receiver can always receive the normal frames without interference from both transmitters.

For this reason, an error check is performed for each frame, an interference frame is regarded as an error, and data processing is performed except for the data of the error frame (interference frame). Frame) can be reliably obtained. In the case of the present embodiment, the alarm basic data from each transmitter 1 can be reliably and almost continuously obtained on the receiver 2 side even if the interference frame is excluded, and the sound and light emission of the alarm lamp 46, the alarm buzzer 52 and the like are provided. An alarm generating device that generates an alarm by the transmitter 1
Can be operated in accordance with.

Even if the interference frame contains tilt angle data exceeding the alarm angle set on the receiver 2 side for the first time, an abnormal flag, an emergency flag, and the like, any frame period is slightly shorter than the detection time. Because it ’s time,
The delay of the report (the delay of the alarm by the receiver 2 when the operator 6 has a trouble) is almost zero, and there is almost no problem in practical use.

Next, the operation of the receiver 2 will be further described. As shown in FIG. 12, the receiver 2 receives a carrier of only one (one type) frequency by the radio receiver 42, and receives the received carrier (mixed). Signal processing device 4)
3. Serial / parallel converter (D / D converter) 6
1 as parallel data, each communication data (each frame) converted in parallel on the reception signal processing device 43 side is compared with a frame header and input to a state counter. It determines the frame tilt angle data, attitude flag data, station number ID data, frame check code (FCS data), and the like.

Then, errors such as inclination angle data, posture flag data, and station number ID data are checked, and only valid (no error) frames are extracted. The inclination angle data, posture flag data, and station number ID data of the effective frame are extracted. And the like as valid data, and the station number I in this valid data
The D data is input to the multiplex decoder 3 provided on the reception signal processing device 43 side, and is output from the multiplex decoder 3 for each station number ID, that is, for each transmitter 1, and an alarm lamp 46 and an alarm buzzer for each transmitter 1 are provided. 52 is input to the storage circuit 60.

On the reception signal processor 43 side,
The valid tilt angle data is compared with the alarm angle set by the alarm angle switch 49 on the receiver 2 side by the comparator 62, and the data obtained by this comparison is compared with the detection time set by the detection time switch 51 on the receiver 2 side. Of the receiver-side posture flag data (consisting of an abnormal flag when an abnormal posture has occurred and other normal flags) generated on the receiver 2 side together with the valid posture flag data from the transmitter 1 Input to the switch 63.

The signal switch 63 is switched by the alarm selection switch 54 so as to output either the attitude flag data on the receiver 2 side or the attitude flag data from the transmitter 1 side. The flag data is input to the storage circuit 60 for the corresponding transmitter 1 (station number ID data). Then, the display blink timer 64 for blinking the alarm lamp 46 and the display (alarm lamp 46) output from the storage circuit 60 are AND-processed, and this data and the display output are input to the display signal switch 66. At the same time, the output for the alarm sound (alarm buzzer 52) is input to the signal switch 67 for audio.

When the abnormal flag and the urgent flag are input as described above, the signal switch 6 is stored in the storage circuit 60 for the transmitter 1 which has output the abnormal flag and the urgent flag.
6 and 67, and outputs from the signal switches 66 and 67 for the alarm lamp 46 and the alarm buzzer 52.
The corresponding alarm lamp 46 for the transmitter 1 blinks and the alarm buzzer 52 sounds.

At this time, an alarm release switch 68 is connected to the signal switchers 66 and 67, and the alarm lamp 46 is operated by operating the alarm release switch 68.
Blinking and the alarm buzzer 52 can be stopped.
The reception signal processing device 43 can be configured by software (microcomputer type) or hardware (gate array, DSP, etc.) similarly to the transmission signal processing device, and can be developed relatively easily.

The receiver 2 is configured as described above, and the emergency alert device of the present embodiment monitors a plurality of workers 6 individually with one receiver 2 for each worker 6 (transmitter 1). However, in the receiver 2, by applying (adopting) the data communication method of the present invention, one receiver can be provided without providing a plurality of carrier wave receiving portions (a mechanism for receiving a carrier wave of a plurality of frequencies). 2 allows information from a plurality of transmitters 1 to be managed.

As a result, the structure of the receiver 2 can be simplified, the cost can be reduced, and there is no need to use a hybrid transformer or a filter.
Is minimized, and communication errors due to carrier attenuation are small. Therefore, stable communication is performed,
The information from each of the transmitters 1 can be reliably received at the receiver 2, and an alarm can be reliably generated for each transmitter 1. In addition, by performing the wireless communication using the carrier wave with a specified small power and a weak power that is not regulated by the Radio Law, a wider range of users (licenses are unnecessary) can be targeted.

As described above, it is possible to determine the abnormal posture of the worker 6 on both the transmitter 1 side and the receiver 2 side. Therefore, it is necessary to change the reference for detecting the abnormal posture for each transmitter 1. And the receiver 2 can collectively set the reference for the abnormal posture detection. The angle teaching switch 26, the detection time setting switch 27, the alarm angle switch 49, and the detection time switch 51 set the abnormal posture detection setting condition ( (Alarm angle and detection time) can be set in multiple combinations, and more accurate emergency alarms can be set based on the setting conditions for abnormal posture detection that is more appropriate for the work environment, work content, workers, and intended use. Can be generated.

On the other hand, the receiver 2 is provided with an external output terminal 48 (an output terminal for an external lamp and a sound generating device) on the bottom surface 2b as described above, and as shown in FIG. External lamp 71 such as patrol light at terminal
And the siren 72 are connected to provide the external lamp 71 when any of the workers 6 takes an abnormal posture.
Alternatively, the siren 72 may be operated to notify the operator on the receiver 2 side. This can prevent erroneous recognition such as the operator overlooking the operation of the receiver 2.

Further, an external relay terminal 73 (refer to FIG. 9) for inputting / outputting a received carrier wave of the receiver 2 is provided on the receiver 2 side through a wired communication interface 70 (refer to FIG. 12). In this case, one receiver 2 is used as a host, and another sub receiver 2 ′ is connected to the relay terminal 7.
3, so that the sub-side receiver 2 'operates in the same manner as the host-side receiver 2 without directly receiving the carrier wave from the transmitter 1 (alarm operation). Can be done. By connecting the external output terminal 73 to an automatic reporting device 74 using a telephone line,
It is also possible to notify the abnormality of the worker 6 as described above through a telephone line.

[0050]

According to the structure of the present invention configured as described above, at least one receiver can manage data from a plurality of transmitters for each receiver. Since the carrier wave of each transmitter has the same frequency, a system for receiving a carrier wave of a plurality of frequencies in the transmitter and the receiver becomes unnecessary, and a communication device (transmitter and receiver)
Has the advantage that the structure of the communication system can be simplified and the cost of the communication system can be reduced.

In particular, since data is transmitted at a different cycle for each transmitter, even when data from each transmitter interferes due to the start-up time of the transmitter, the receiver does not always interfere after the interference. Regular data can be received, and by setting the transmission period of data from each transmitter to a very short time, particularly in the case of data where continuity is not a problem, communication can be easily and reliably performed.

For this reason, the worker who works at a place away from the receiver, which is an alarm device, carries a transmitter equipped with an inclination sensor for detecting the posture (standing angle) of the worker, thereby allowing the worker to carry out the work. In case of sudden fall, etc., the worker's abnormality can be transmitted / reported to the receiving device side based on the inclination angle from the inclination sensor, and the working state (abnormality) of the plurality of workers can be notified to at least one receiver ( Alarm device).

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a data communication method according to the present invention.

FIG. 2 is a schematic diagram showing a transmission / reception state between an operator and a receiver.

3 (a) and 3 (b) are a front perspective view and a rear perspective view of a transmitter, and FIG. 3 (c) is a front perspective view of a belt clip.

FIG. 4 is a block diagram of a transmitter.

FIGS. 5A and 5B are a plan view and a front perspective view of a gyro.

FIG. 6 is a block diagram of a tilt sensor.

FIG. 7 is an operation chart of the transmitter.

FIG. 8 is a schematic block diagram of a receiver.

FIG. 9 is a bottom view of the receiver.

10A shows a frame of a received carrier, and FIG. 10B shows a frame of each transmitter.

FIG. 11 shows another example of a frame for each transmitter.

FIG. 12 is an operation chart of the receiver.

FIG. 13 is a conceptual diagram of a data communication method according to the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 transmitter 2 receiver 4 tilt sensor 8 transmission signal processing device 9 wireless transmission device 31 A / D converter 42 wireless reception device 43 reception signal processing device

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Michiyoshi Fujii 1349 Higashitsudacho, Matsue City, Shimane Prefecture Inside Shink Fujii Co., Ltd. Inside the company Techno Brain

Claims (6)

[Claims] An apparatus for transmitting data between a plurality of transmitters (1) for transmitting data using a carrier wave of a predetermined frequency and at least one receiver (2) for receiving a carrier wave from the transmitter (1). In a data communication method for transmitting and receiving, data to be transmitted by each transmitter (1) is modulated on a carrier wave of the same frequency and transmitted at a predetermined period different for each transmitter (1). A data communication method for receiving a carrier wave from each transmitter (1) and sorting and processing the received data for each transmitter (1) based on data for identification. 2. A data communication system comprising: a plurality of transmitters (1) for transmitting data using a carrier of a predetermined frequency; and at least one receiver (2) for receiving a carrier from the transmitter (1). In the apparatus, each of the transmitters (1) is an apparatus that modulates data to be transmitted, which is included in each transmitter (1), on a carrier having the same frequency and transmits the data at a different cycle for each transmitter (1). (2) The above transmitters (1)
And transmits the received data to the transmitter (1) based on the identification data provided on the transmission data side or the receiver (2) side. A communication device for data that is used as a communication device. 3. The receiver (2) sorts predetermined data transmitted from the transmitter (1) for each transmitter (1),
An alarm device for generating an alarm corresponding to each transmitter (1) based on the data, wherein a sensor for alarm basic data, which is data for generating the alarm, is provided on the transmitter (1) side. Item 3. The data communication device according to Item 2. 4. The data communication device according to claim 3, wherein the sensor is a tilt sensor for detecting a tilt amount of the alarm target. 5. An A / D converter (31) for digitizing an output of a tilt sensor (4), comprising: a transmitter (1);
A transmission signal processing device (8) that processes an output from the D converter (31) and predetermined internal data to output a predetermined data group, and converts the data group output from the transmission signal processing device (8) into a predetermined data group. Each transmitter (1) on a carrier of frequency
A radio transmission device (9) for modulating and transmitting the signal at a predetermined cycle set for each transmission device, wherein the transmission signal processing device (8) is
The output from the A / D converter (31) is processed into alarm basic data indicating the amount of inclination of the alarm target or the abnormal inclination of the alarm target requiring an alarm, and is used for data distribution on the receiver (2) side. 5. The data communication device according to claim 4, wherein the data communication device according to claim 4 is configured to generate the data for identification, generate a data group including the identification data and the alarm basic data, and output the data group serially. 6. A radio receiver (42) for receiving a carrier of a unique frequency, and a radio receiver (4).
A received signal processing device (43) that converts a data group included in the carrier received in 2) into parallel, and distributes and outputs the data group to each transmitter (1) based on the identification data; 6. The data communication device according to claim 2, further comprising: an alarm generation device that generates an alarm by sound or light emission according to an output from the reception signal processing device (43).