JPS5846496A - Transmission system for measuring data - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a measurement data transmission system.

In the case of a system in which various sensors are installed on civil engineering and construction machinery, etc., and measurement data obtained from the sensors is monitored in a measurement room, each sensor and the measurement room have conventionally been connected with separate cables. For this reason, as the number of sensors increases, the number of cables also increases, and the weight of the cables increases, making handling difficult. ■Problems related to connectors, such as disconnections and poor connections at connectors, will increase. ■Capacitance is generated isometrically between cables, causing crosstalk, etc., and if measures are taken to prevent this, the weight of the cables will further increase. Such problems arose. Furthermore, the characteristics of measurement data often differ from sensor to sensor, and adjustments to frequency characteristics, gain adjustment, and the like must be performed for each channel, which requires a large amount of time. Furthermore, since there is no compatibility between cables, in the case of a system directly connected to a combiator system, it is necessary to add cables and interfaces every time the system is expanded or changed.

A number of problems were occurring.

The present invention has been made in view of the various problems mentioned above.
The objective is to provide a standard measurement data transmission method that allows various controls and adjustments to be performed on the data receiving side while using a lightweight cable.

According to the present invention, the measurement data obtained from various sensors is time-division multiplexed and sent to the data receiving side, and the data receiving side sends various control commands to control the data sending side and perform various adjustments on the data receiving side. It is centrally managed. That is, the measurement data transmission system of the present invention includes a data transmitter that time-division multiplexes various measurement data for each channel and a data receiver that distributes the time-division multiplexed measurement data to predetermined channels in a first data way. (5) At the same time, connect the command transmitting section on the receiver side and the command receiving section on the transmitter side with a second data way,
By transmitting various control commands from the command transmitting section to the command receiving section via this second data way, the control on the transmitter side is centrally managed on the receiver side.

For example, according to an embodiment of the present invention, channel selection information is transmitted as part of a control command, and based on this, the data transmitter time-division multiplexes measurement data from various sensors randomly or sequentially for each channel. ing. That is, in this embodiment, by controlling the transmission sequence of channel selection information on the receiver side, the transmission sequence of measurement data is controlled for each channel. In such embodiments, the data transmitter includes, for example, a multiplexer that selects measurement data from various sensors and a channel selector that controls the multiplexer, and is configured to switch the multiplexer in accordance with a control command.

Further, according to another embodiment of the present invention, the data transmitting section (6) and the data receiving section are divided into blocks for each predetermined number of channels, and the measurement data output from the data transmitting section is serially transmitted for each block. digitized and transmitted. That is, in this embodiment, the number of channels for each block is used as the basic cycle of time division multiplexing, and a delay in transmission speed due to an increase in the number of channels is prevented. In such an embodiment, the data transmitter includes a parallel/serial conversion type block multiplexing register, and the data receiver includes a serial/parallel conversion type block register, and outputs from each block of the data transmitter. The measured data transmitted through the first data way is serialized by a block multiplexing register and sent to the first data way, and the measured data transmitted via the first data way is sent to each block of the data receiving section/to the mother channel. It is configured to add.

According to yet another embodiment of the present invention, channel selection information and block selection information are sent to the turtle as part of the control command, and any one of the blocks of the data transmitter is effectively operated. . In such an embodiment, a signal obtained by decoding the block selection information is applied to the channel selection circuit in each block of the data transmitter, and only the blocks selected by the signal decoded from the block selection information operate effectively. .

According to yet another embodiment of the present invention, the offset value of the data transmitter is set for each channel by sending a calibration signal as part of the control command at the time of initial setting of the system.

That is, this embodiment is intended for the transmission system of the present invention to be standardized as a product, and to adapt a wide variety of measurement data obtained from a wide variety of sensors to the transmission range, and to make it suitable for the receiving side. Transmit measurement data. In such an embodiment, the data transmitter is equipped with a differential amplifier that outputs the difference between the measured data and the offset value for each channel, and an offset memory that provides the offset value to the differential amplifier, so that the differential precision signal is transmitted. The offset value is then set in the offset memory.

According to yet another embodiment of the present invention, optical fibers are used as the first and second data ways to improve information quality. In such an embodiment, a photoelectric conversion element and an electro-optical conversion element are installed at both ends of each data way.

According to yet another embodiment of the present invention, voice signals are carried on the first and second data ways to enable communication between the transmitter and the receiver. In these various embodiments, a handset is provided in the command transmitter and the command receiver, and an audio signal obtained from the transmitter on the command transmitter side is added to the control command, and the command is transmitted via the second data way. The voice signal obtained from the transmitter of the command receiver is added to a block multiplexing register, and is added to the receiver of the command transmitter via the first data way. ing.

Further, according to yet another embodiment of the present invention, it is possible to cope with future expansion and changes of the system by simply adding and replacing sensors. In other words, in such an embodiment, a margin is provided in advance for the number of channels (9) in the data transmitting section and the data receiving section, and the number of channels can be substantially increased by adding sensors by using plug-in type sensors. It is structured so that it can be

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing an outline of the present invention, and the transmission system of the present invention is composed of a transmitter IA1, a receiver 2, and optical fibers 3 and 4. The transmitter 1 is divided into blocks for every 16 channels and has 98 blocks of data transmitting sections DT1 to DT, - a block multiplexing register BMR/optical that serializes the measurement data output in parallel from the data transmitting sections DTI to DTa. It is equipped with a command receiving section OR which interprets control commands transmitted through the fiber 4 and outputs control signals 01 to C6, and a handset T1 connected to the command receiving section CR. On the other hand, the receiver 2 parallelizes the measurement data transmitted via the optical fiber 3 into 8 blocks of data reception section DRI-DR@, which are divided into blocks for each 16 channels, and transmits each data (10) to the data transmission section DRi~ Block register BR added to DR,
・Command transmitter CT that sends control commands to the optical fiber 4 ・Handset T connected to this command transmitter CT! Equipped with:

First, the flow of measurement data will be explained. A total of 128 sensors S1 for each channel are connected to the eight data transmitting units DTr to DT, which are divided into blocks for every 16 channels, and the measurement data obtained by each sensor S1 to 514g is connected. is applied to each data transmitter DT1 to DT. Each data transmitter DTI to DT.

selects one channel from each of the 16 channels of measurement data, time division multiplexes it, blocks multiplexes it, and registers BMH.
Add to. The block multiplexing register BMR serializes the measurement data of a total of 8 channels added one channel at a time from each data transmitter DT, % DT, and sends it to the optical fiber 3, and this measurement data is sent to the block register BH.
added to. Block register BH contains 8 channels (
That is, when measurement data for 8 blocks) is stored, this measurement data is applied to each data receiving section DRj to DR in parallel.

Each data receiving unit DR~DR has 16 channels of output Os''・01*8, and when each receives measurement data for one channel, outputs of a predetermined channel are 01~0.
Send it to 11.

Next, the flow of control commands will be explained. Control commands are given to the command transmitter CT from a console panel or computer system. This control command is sent to the optical fiber 4 in a predetermined manner by the command transmitter CT, and is transmitted to the command receiver OR. The command receiving unit CR interprets this control command and applies control signals C1 to C- to the data transmitting unit DTI-DTa.
Performs initial settings, block selection, channel selection, etc. of the data transmitting units DTI to DTs.

Next, the flow of audio signals will be explained. First, an audio signal from the receiver 2 side is applied from the handset T to the command transmitter CT, added to a control command, and transmitted via the optical fiber 4 to the command receiver CR. Command receiving section C
R extracts the voice signal from the transmitted signal and adds it to the handset TI.

(The audio signal from the transmitter 1 side is transmitted from the handset TI to the block multiplex register BMR via the command receiver CR.
added to. The audio signal applied to the block multiplex register BMR is added to the measurement data and transmitted to the block register BH via the optical fiber 3. The block register BR extracts the voice signal from the transmitted signal and applies it to the handset T2 via the command transmitter CT.

Next, a more specific example will be shown. In addition, FIG. 2 shows the configuration of the command transmitter CT and command receiver CR, FIG. 3 shows the configuration of the data transmitter DTs and block multiplexing register BMR, and FIG. 4 shows the configuration of the data receiver DR1 and block register BR. are shown respectively.

First, at the time of initial setting, the command multiplexing register 5 in the command transmitting section CT receives a carry preset signal, a clear signal, and
The latch signal, channel number, block number, etc. are converted into PCM and written as control commands. Note that in this embodiment, the PAM signal is encoded using 3 bits, i5
This will be explained assuming that it is converted into PCM. This command control signal is 1! / is serially added to the optical converter 6 (13), where it is converted into an optical signal, and then
The signal is applied to an optical/electrical converter 7 via an optical fiber 4, where it is converted into an electrical signal and applied to a command register 8. The control commands applied to the command register 8 are demodulated and applied to the command control section 9 in succession. The command control section 9 interprets the applied control command and outputs an 11-bit control signal at an appropriate timing. First, the lower three bits of the control signal are applied to the decoder 10.
A bit block selection signal C6 is generated. This block selection signal CI corresponds to each of the data transmission sections DTt to DT, and one of the 8-bit block selection signals C- is valid to select a block in the data transmission section.

In this case, it is assumed that the data transmitter DTs is selected. This block selection signal Ca is applied to the channel selector 11 of the data transmitter (see Fig. 3).6 Subsequently, a 4-bit channel selection signal C6 is output to select the channel of each data transmitter DTI to DT. It is added to the selector 11. Since the block currently being selected is the data transmitting section DTI, only the channel selector in the data transmitting section DTt operates effectively, and channel selection is performed by switching the multiplexer 12. It is assumed here that the first channel is selected. Also, the output of the channel selector 11 is a decoder D with 4 human power and 16 outputs.
The output of this decoder DEC is applied to the switch SWI and the offset memory M! is selected. Next, clear signal C5/offset value setting signal C
I ・Switch change signal C! is output. By adding the clear signal C3, the offset memory 114+
By clearing n and applying the offset value setting signal CI, the reference signal generator 13 selects the ground potential. Next, switch switching signal C! , the switch SWI selects a normally open terminal, that is, the reference signal generator 13, and as a result, Ot is applied to one input of the differential amplifier OAI. Differential amplifier OA1
The other input of the offset memory M is cleared.
Since the content of 1 is added from the digital/analog converter DA, the output of the differential amplifier OA+ becomes 0 potential.

The output of this differential amplifier OA1 is applied to an analog/digital conversion circuit 13 via an analog multiplexer 12 and output as a 12-bit PAM signal. At this time, latch signal C number is applied from the command control unit 9 to the offset memory M1, the PAM signal is latched in the offset memory M1, and the contents of the offset memory M1 are set to "0". Subsequently, the switch switching signal C is applied to the switch SWt side, and the switch SWI selects the normally closed terminal, that is, the sensor S1 as shown. Measured data is added from the sensor S1, and this measured data is added to the differential amplifier OA via the bridge circuit Bl, the amplifier A, and the switch SW1, and is converted into an analog signal of the contents of the offset memory M1. The difference between the two is output from the differential amplifier OA+. The output of this differential amplifier OA is applied to an analog/digital converter 13 via an analog multiplexer 12 and output as a 12-bit PAN signal. At this time, the latch signal C4 is added to the offset memory IJ'M1, and the value of the PAM signal is added to the offset memory as an offset value. The reason why the offset value is set based on the measurement data from the sensor S1 in this way is as follows. That is, the level of the input signal obtained from the sensor varies depending on the type of sensor.

FIG. 5(a) shows a case where the input signal has a high level of robustness, and FIG. 5('b) shows a case where the input signal has a low level. Therefore, the present invention determines the offset value depending on the level of the input signal and effectively utilizes the transmission range of the 12-bit PAM signal. The offset memory R11t is equipped with a backup power source, and once an offset value is set, it holds that value until it is rewritten. In the above explanation, the case where the first channel of the first block is initialized is explained as an example, but in the case of other blocks and other channels, the channel number block added to the command multiplex register 5 in the command transmitter CT is also used. The only difference is the number, and everything else is the same.

Next, transmission of measurement data will be explained. Here, we will explain the transmission of measurement data obtained from the sensor 8+ of the first block and first channel as an example, but other blocks and
The same holds true for other channels.

First, a block sequence and a channel sequence regarding transmission are determined in advance, and a sequence of channel numbers and a sequence of block numbers to be added to the command multiplexing register 5 in the command transmitter CT are determined accordingly. Further, in the measurement data transmission mode, no calibration signal, clear signal, latch signal, etc. are added.

The channel number and block number added to the command multiplexing register 5 are sent to the command receiving section CR in the same manner as in the initial setting described above, and added to the command control s9. Since the calibration signal, clear signal, and latch signal are not transmitted as control commands, the command control unit 9 sends the channel selection signal C5 and the decoder 10.
Only the block selection signal C6 is output as a valid signal through the channel selection signal Cs and the block selection signal C6, and the first channel of the first block is selected by this channel selection signal Cs and the block selection signal C6. Measurement data applied from sensor S1 is applied to switch SW1 via bridge circuit B1 and amplifier AI. At this time, switch 1 has selected the normally closed terminal, so the measurement data is applied to differential amplifier OA1 via switch SW1. Differential amplifier OA is offset memory M.

This measurement data is added to the analog/digital converter 13 via the analog multiplexer y'12 and output as a 12-bit PAM signal.・This PAM signal is 3
The bits are encoded into PCM and held in the channel multiplex register 14. At this time, channel selector 11
A 4-bit channel number is added from , and this channel number is also converted into PCM and held in the channel multiplex register 14 .

At the same time, a 4-bit head mark is generated from the head mark generation circuit 15, and this head mark is also held in the channel multiplex register. Channel multiplex register 14
is a 4-bit channel number as a head mark and 1 as a channel number.
It is a parallel-in/serial-out type shift register having a capacity of 36 bits as 2-bit measurement data, and is configured to shift to the right every time a shift clock is applied from the counter CT. Note that the counter CT is the oscillation clock of the oscillator OC (this oscillation clock is used to shift out the block multiplexing register 16) divided by 16. The measurement data shifted out from channel multiplexing register 14 is added to block multiplexing register 16. This block multiplexing register 16 has three bits: 4 bits, 8 bits, and 6 bits.
This is a parallel-in/serial-out type shift register with areas, and the first 4-bit area is allocated to the head mark, the next 8-bit area to measurement data, and the last 6 bits to the audio area. Each area will be explained as follows. First, a head mark generated by the head mark generation circuit 15 is written in the first four bits, and this head mark is used by the receiver 2 to identify blocks. Therefore, this head mark is written by another block when another block is selected. Further, the head mark generation circuit 15 writes head marks to the channel multiplexing register 14 and the block multiplexing register 16 each time the circuit goes around. Channel multiplex register 14 is block multiplex register 1
6 is shifted by 1 each time it goes around, so while a head mark is written to the channel multiplexing register 14 once, a rad mark is written to the block multiplexing register 52 times.

The area for the next 8 bits of measurement data is 8 bits each.
The measurement data from the data transmitter DTI is assigned to the first bit of the data transmitter DTI. Further, the second and subsequent bits are written by the data transmitting sections TD, -TD of other blocks, but since those blocks are not selected, they are not valid as data.

The final 6-bit audio area will be explained in its entirety later.

The contents of the block multiplexing register 16 are the oscillator OC.
The signal is shifted out by the oscillation clock, and sent to the optical fiber 3 as an optical signal by the electrical/optical converter 17. Every time the block multiplexing register 16 makes one round, the shift clock is sent from the counter CT to the channel multiplexing register 14.
When the block multiplexing register 16 has made 52 rounds, the label mark, channel number, and measurement data in the channel multiplexing register 14 have been transmitted to the receiver 2 side.

The data thus transmitted is converted from the optical fiber/43 into an electrical signal by the optical/electrical conversion circuit 18, branched and applied to the clock generation circuit 19 and block register 20. This clock generation circuit 19 includes, for example, a differentiating circuit, etc., and generates a shift clock based on changes in the input signal, and this shift clock is transmitted to the block register 20.
added to. This block register 20 is a serial-in/parallel-out type shift register, in which head marks (4 bits), measurement data (8 bits), and audio signals (6 bits) are sequentially shifted in each time a shift clock is applied. . Top 4 of block registers 20
For example, the bit is used as a head mark detection section 21 by adding a decoder or the like, and when a head mark is shifted into this head mark detection section 21, a head detection signal HD is output from the head mark detection section 21. be done. This head detection signal HD is applied to the blocked data receiving sections DR, -DRs, and only the data receiving section enabled by this head detection signal device performs an effective receiving operation. More specifically, this head detection signal HDt-j is defined as a shift in clock of the channel register 22, and the channel register 22 performs a shift operation by this shift in clock. That is, an 8-bit head detection signal HD is output from the head detection section 21, and each of the head detection signal generators adds one bit at a time to the channel register 22 in the data reception section DR+-DRs as a shift in clock. It is being Currently, the head mark transmitted from the data transmitting section DT1 has entered the head detecting section 21, so the head mark detecting section 21 sends the head mark to the data receiving section DRs.
Only the head detection signal applied to the channel register 22 in the data receiving section TRa is a valid shift impulse, and the head mark detection signal applied to the channel registers in the other data receiving sections TR, ~TRa is a valid shift in clock. Therefore, the measurement data output from the first bit of the data area of the block register 20 is shifted in only to the channel register 22 in the data receiving unit DRI.

Incidentally, at this time, a 6-bit audio signal is outputted in parallel from the block register 20, but this will be explained in detail later.

The channel register 22 is a serial-in/parallel-out type shift register corresponding to the channel multiplexing register 14, and includes a 4-bit head mark area, a 12-bit channel number area, a 36-bit measurement data area, starting from the first bit. It has a total capacity of 52 bits.

The channel register 22 performs a shift operation using the head detection signal HD as a shift in clock, and the head mark detection circuit 21 outputs the head detection signal HD every time the block register 20 makes one round. Each time the channel register 22 goes around, the channel register 22 goes around once. That is, every 52 cycles of the block register 20, the head mark/channel number measurement data in the channel multiplexing register 14 is transferred to the channel register 22.

When the channel register 22 has 52 bits of data, that is, when the head mark appears in the upper 4 bits of the channel register 22, the contents of the channel register 22 are transferred out.

First, the head mark informs the next stage and subsequent stages that the data is available in the channel register 22, and they become ready for operation.

Also, the channel number is decoded and applied to the channel discrimination circuit 23 as a 4-bit PAM signal. The channel discrimination circuit 23 discriminates the channel based on this PAM channel number, and applies a write stroller signal to one of the memories ME, . Since the measurement data obtained from the sensor SI is currently being read from the channel register 22, the write stroller signal is applied to the memory MEt. The measurement data is also decoded and output as a 12-bit PAM signal, which in this case is stored in the memory Mli1.

Moreover, this PAM-format measurement data may be digitally outputted to the outside at the same time.

A digital/analog conversion circuit DAO is provided at the next stage of the memory MEI.The measurement data stored in the memory ME+ is demodulated here, and the analog measurement data is sent to the buffer amplifier BUA. It will be done. The buffer amplifier BUA t is for matching the measurement data of the first channel. Specifically, the buffer amplifier BUA * is used to adjust impedance, output form (for example, whether to output as a voltage signal or a current signal, etc.), full span adjustment, gain adjustment, zero adjustment, etc. The reason why the buffer amplifier is provided here is that in order to make the measurement data transmission system of the present invention a standardized product, it is necessary to adapt to different signal lines for each glaze type and various requirements. Based on something. The measurement data added to the buffer amplifier BUAI is subjected to various matching in the buffer amplifier BUA 1, and is sent to the measurement room as measurement data CI of the first channel. In addition, although the case where the measurement data of the first channel of the data transmitter DTI is transmitted is explained above as an example, the same applies to the case of transmitting the measurement data of other channels/other blocks. The only difference is the number and block number. Therefore, it is recommended to set the prox sequence and channel sequence in advance depending on the type of sensor connected to each channel, the type of measurement data for each channel, the frequency characteristics of the measurement data for each channel, etc. Yes, necessary measurement data can be transmitted as appropriate.

Next, a communication between the transmitter 1 and the receiver 2 will be explained.

First, the audio signal from the receiver 2 side is received from the handset T2, amplified by the audio amplifier vA2, and then converted into an analog/
It is added to the digital conversion circuit 24. This audio signal is converted into PAM by an analog/digital conversion circuit 24. The command multiplexing register 5 has a 6-bit area 51 for transmitting audio signals, and a PAM audio signal is written as a PCM into this area 51. The audio signal written in the area 51 is shifted out after the control command is shifted out from the command multiplexing register 5, and is transferred to the electrical/optical converter 6, the optical fiber 4, and the optical/electrical converter 7.
The data is shifted into the command register 8 via the command register 8.

The command register 8 also has a 6-bit area 81 for audio signals, and the transmitted audio signals are stored in this area 8.
1 will be posted. The audio signal written in area 81 is output in parallel at the same time as the control command is output from command register 8 in parallel, decoded by digital/analog conversion circuit 25, amplified by audio amplifier VA, and added to handset TI. It will be done.

Next, the audio signal from the transmitter 1 side is applied from the handset T1, amplified by the audio amplifier VA+, and then applied to the analog/digital conversion circuit 26, where it is converted into PAM.

The block multiplexing register 16 has a 6-bit area 161 for transmitting an audio signal, and the audio signal converted into PAM is converted into PCM and written into this 6-bit area 161.

The audio signal written in this area 161 is shifted out after the four measurement data are shifted out from the block multiplexing register 16, and is then shifted out to the electrical/optical converter 17, optical fiber 3, and optical/electrical converter 18. via block register 2
Added to 0. The block register 20 has a 6-bit area 201 for receiving audio signals, and the transmitted audio signal is written into this 6-bit area 201. The audio signal written in this area 201 is output in parallel at the same time as the measurement data is output from the block register 20, decoded by the digital/analog conversion circuit 27, and amplified by the audio amplifier VA. Added to T2.

As explained above, the measurement data transmission (29) transmission system according to the present invention uses only two data ways no matter how the number of channels increases. Provides an easy-to-use system. Furthermore, according to the present invention, control on the data transmitter side can be centrally managed on the data receiver side, so it is possible to freely configure a transmission system that satisfies the requirements of the data receiver side. That is, according to the present invention, transmission sequence control for each channel and
Since the control of the offset value for each channel can be freely set on the data receiving side, it is possible to freely design a system using various sensors with different characteristics. Furthermore,
In the present invention, channels are divided into blocks of a predetermined number, so that even if the number of channels increases, according to the present invention, transmission delays caused by time division multiplexing can be kept to a minimum. Furthermore, in the present invention, since various sensors are plug-in type, even if there is a request to add or change sensors as long as the number of transmission channels is available, it is possible to connect sensors, change offset value settings, and transmit data. The above requirements can be met simply by changing the sequence. In the present invention, the transmission path is composed of optical fibers, so the information quality is extremely superior. According to the invention, without adding new transmission lines,
Since communication between the two stations is possible, delicate instructions can be given that cannot be obtained by simply exchanging measurement data and control commands.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a circuit diagram of a command transmitting section and a command receiving section, and FIG. 3 is a circuit diagram of a data transmitting section. FIG. 4 is a circuit diagram of the data receiving section. FIG. 5(a) (b) is a diagram showing the relationship between the input signal and the offset value. 1... Receiver, 2... Transmitter, 3, 4... Optical fiber, DT, -DT,... Data transmitter, DRI
-DRa...Data receiving section, CT...Command transmitting section, CR...Command receiving section, T1, T,...Handset, BMR...Block multiplex register, BR...
・Block register, S1 to S□6...Sensor.

Claims (8)

[Claims] (1) In a measurement data transmission system that transmits measurement data of multiple channels from a transmitter to a receiver via a data way, a first data way that transmits the measurement data from the transmitter to the receiver and control a second data way that transmits the data from the receiver to the transmitter, and the transmitter time-division multiplexes the measurement data of the plurality of channels for each channel and sends it to the first data way. comprising a data transmitting unit and a command receiving unit that interprets a control command sent via the second data way and applies a control signal to the data transmitting unit;
The receiver includes a data receiving section that outputs measurement data time-division multiplexed and sent via the first data way to a predetermined channel, and a command transmitting section that sends the control command to the second data way. A measurement data transmission system, comprising: controlling the data transmitting section by a control command transmitted from the command transmitting section to the command receiving section via the second data way. (2) A patent claim in which channel selection information is provided as part of the control command, and the data transmitter selects the measurement data based on the control signal supplied from the command receiver that interprets the channel selection information. A measurement data transmission system according to scope (1). (3) The data transmitting section and the data receiving section are divided into blocks for each predetermined number of channels, and measurement data output in parallel from each block of the data transmitting section is sent to the data receiving section via the first data way. The measurement data transmission system according to claim 2, wherein the measurement data is transmitted serially to each block of the data receiving section, and the measurement data transmitted serially is added to each block of the data receiving section in parallel. (4) Channel selection information and block selection information are given to a part of the control command, and the data transmitter receives the control signal supplied from the command receiver that interprets the channel selection information and block selection information. Claim No. (3) Selecting measurement data to be transmitted
Measurement data transmission system described in Section 1. (5) The data transmitter includes a differential amplifier that outputs the difference between the measurement data and the offset value for each channel, and an offset memory that provides the offset value to the differential amplifier, and also includes a part of the control command 1. The measurement according to claim 1, 2, 3, or 4, wherein a calibration signal is applied, and when the calibration signal is transmitted to the command receiving section, an offset value is set in the offset memory. Data transmission system. (6) Claims 1, 2, 3, and 3, wherein the first and second dataways are constructed of optical fibers.
The measurement data transmission system according to item 4 or 5. (7) Claims (1), (2), (3), (4), in which audio signals are carried on the first and second data ways
The measurement data transmission system according to item 5 or 6. (8) Claims 1, 2, 3, 4, 5, and 6 in which various sensors that add measurement data to each channel of the data transmitter are plug-in type.・
Or the measurement data transmission system described in item 7.