JPH0729083A - Measurement processing system - Google Patents

Abstract

PURPOSE:To provide a measurement processing system in which measurement efficiency and the reliability of a data transmission processing are improved by automizing the recognition of data transmission and also power consumption is saved. CONSTITUTION:A measurement processing system is constituted by providing plural gages 1 fixed at a multi-point measuring jig and a data processor 2 being separated from them. In the system, a transmitting/receiving circuit is provided for executing bi-directional communication in the respective gages 1 and the data processor 2, a transmission recognizing signal adding a re- transmission request is transmitted from the data processor 2 to the respective gages 1 and a power source is controlled so as to permit the receivers of the respective gages 1 to operate intermittent reception based on a synchronizing signal transmitted from the data processor 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plurality of gauges for measuring the positions and the like of a large number of different points such as a multi-point measuring jig, and a position apart from these gauges, And a data processing device for processing sent measurement data.

[0002]

2. Description of the Related Art Conventionally, there is known a system in which measurement data of a large number of gauges attached to a multipoint measuring jig is sent to a data processing device by using cable transmission to perform data processing. When the gauge is equipped with a capacitance encoder for absolute measurement (hereinafter referred to as ABS encoder),
The position measurement may be performed and the measurement data may be transmitted only when there is a data request signal from the data processing device. As a result, the average power consumption of the gauge can be reduced, and thus a long battery life can be obtained even with a small button battery.

However, this conventional method has a problem in that as the number of gauges increases, the number of cables also increases and wiring is not easy, and the cables become an obstacle when incorporated in an automatic measuring machine.

[0004]

In order to solve such a problem, a system for transmitting measurement data wirelessly is considered. However, when wireless transmission is used, a transmitter / receiver is required even for a small gauge, and the power consumption of this transmitter / receiver is large, resulting in a short battery life. By turning on the power of the transmitter only when transmitting data, it is possible to eliminate unnecessary power consumption. However, for the receiver, it is necessary to keep the power on at all times so that the data request signal may come at any time, which is the biggest factor for extremely shortening the battery life.

In view of the above points, the present invention uses wireless communication to automate the confirmation of data transmission to improve the measurement efficiency and reliability of the data transmission processing, and at the same time, reduce the power consumption. The purpose is to provide.

[0006]

According to the present invention, a plurality of gauges for measuring the positions and the like of a large number of different points and measurement data sent from each gauge at a position apart from these gauges are used. In a measurement processing system having a data processing device for processing, each of the gauges stores a measured data, a transmitting means for transmitting the measured data, and a transmission signal from the data processing device. Based on a synchronization signal from the data processing unit, a re-transmission control unit that controls to re-transmit the data stored in the storage unit when there is a re-transmission request from the data processing device, And a reception control means for intermittently operating the reception means, wherein the data processing device receives the data sent from each of the gauges, and the reception means. And data processing means for processing over data,
It is characterized in that it has a signal generation means for generating a transmission confirmation signal including a retransmission request when there is an error in the synchronization signal and the received data, and a transmission means for transmitting the transmission confirmation signal together with the synchronization signal. .

[0007]

According to the present invention, a two-way communication function is added between the gauge and the data processing device, so that automatic transmission confirmation and re-transmission in the case of a transmission error are made, thus improving the measurement efficiency. The reliability of data transmission processing is improved. Each gauge is equipped with a transceiver, but the transmitter need only be turned on when necessary for data transmission, and the receiver should be operated intermittently based on the synchronization signal sent from the data processing device. Therefore, the average current consumption decreases,
The life of the button battery can be extended.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a system configuration of an embodiment, in which a large number of gauges 1 (11, 12) attached to a multi-point measuring jig.
, ...) and the data processing device 2 located away from the data processing device 2. Each gauge 1 is equipped with a capacitance type ABS encoder. The gauge 1 and the data processing device 2 are each provided with a transmission / reception circuit as described later, so that the gauge 11 and the data processing device 2 can perform bidirectional wireless communication. In the case of this embodiment, communication is performed by binary FSK communication. The configurations of the gauge 1 and the data processing device 2 are as shown in FIGS. 2 and 3, respectively.

As shown in FIG. 2, each gauge has an ABS encoder 11 and a measurement circuit 12 that obtains measurement data from the output of this encoder 11. The measuring circuit 12 is an IC made exclusively. The measurement data obtained from the measurement circuit 12 is converted into transmission data by the data conversion circuit 13 to be sent to the data processing device 2. Here, transmission data is created by adding a synchronization signal, a prefix signal, an error detection code, etc. to the measurement data as described later. The obtained transmission data is sent to the transmission circuit 16 via the transmission control circuit 15, and at the same time, sent to the data storage device 14 and held therein. The output of the ID setting circuit 17 is input to the transmission control circuit 15 in order to perform data transmission in a time slot corresponding to the ID number assigned to each gauge. In addition, the transmission control circuit 15
Also controls the power supply of the transmission circuit 16 so that data transmission is performed only when necessary.

The gauge is provided with a receiving circuit 18 for receiving a transmission signal from the data processing device 2. From the output of the reception circuit 18, the synchronization signal and the transmission confirmation signal are separated by the synchronization signal separation circuit 19 and the transmission confirmation signal separation circuit 21, respectively. The data request determination circuit 20 determines whether or not the separated synchronization signal includes a data request, and the data conversion circuit 13 is controlled by the determination result. The retransmission request determination circuit 22 also determines whether or not the separated transmission confirmation signal includes a retransmission request. Then, when the retransmission request is detected, control is performed to retransmit the transmission data held in the storage device 14.

The reception circuit 18 is provided with a reception power control circuit 23. For example, the receiving circuit 18 is powered on in the initial state, and when the transmission signal from the data processing device 2 is received and the synchronization signal is detected, the power supply control circuit 23 supplies the power of the reception circuit 18 based on the synchronization signal. ON / OFF control is performed. The timer 24 measures the transmission cycle of the synchronization signal from the data processing device, and the output of the timer 24 causes the power control circuit 23 to control the power on / off cycle.

As shown in FIG. 3, the data processing device is also provided with a transmission circuit 41 and a reception circuit 31. The power supply of the data processing device is a commercial power supply of 100 V, and there is no strict restriction on the current consumption unlike the gauge. Therefore, the receiving circuit 31
Is always running. The transmission circuit 41 operates only during transmission. A transmission slot separation circuit 32 is provided at the output of the reception circuit 31. Each gauge transmits data using a time slot corresponding to the ID number defined for each gauge, and the data processing device continuously receives this. Therefore, this transmission slot separation circuit 32 separates transmission data for each gauge from a continuous data string.

At the output of the slot separation circuit 32, the error detection circuit 2 which analyzes the error detection code contained in the transmitted data and determines whether or not the transmission data has an error is detected.
2. A data conversion circuit 23 for converting the transmission data into an original measurement data when there is no error, and a data processing circuit 24 for performing necessary data processing on the converted data are provided. The data request signal generation circuit 36 receives a data request from the data processing circuit 35 and generates a data request signal for transmitting the data request to the gauge. This data request signal is included in the synchronization signal generated by the timer 38 and the synchronization signal generation circuit 37 and sent to the transmission circuit 41. Further, the data request signal generation circuit 36 also generates a retransmission permission signal for permitting retransmission to a gauge to be retransmitted when a gauge that needs to be retransmitted occurs in the previous data transmission.

The retransmit required gauge ID number storage circuit 39 is
The error detection circuit 33 stores the ID number of the gauge that needs to be retransmitted due to an error in the transmission data. Since the transmission data from the gauge is continuously sent, the ID number is temporarily stored here. Further, the transmission confirmation signal generation circuit 40 generates a transmission confirmation signal for returning to the gauge that there is no error in the transmission data, and the result of error detection for the transmission data of each gauge is added to this. Further, the ID number of the ID storage circuit 39 is added to the transmission confirmation signal, which prompts the relevant gauge to retransmit.

FIG. 4 shows a specific example of conversion of measurement data from each gauge 1 into transmission data. The measurement data is first converted into BCD data, and polarity data, decimal point position data, unit data, etc. are added to this. The polarity data indicates whether the measurement data is positive or negative.
It is assumed that "0" is positive and "1111" is negative. The unit data is, for example, "0000" in mm and "1111" in inch. In addition to the 44-bit measurement data with these additional information,
A 7-bit error detection code A is added, and further, a synchronization bit, a prefix bit, status data, and an error detection code B are added to form transmission data. Status data includes
Enter the data of operating status such as battery check, coordinate mode, and unit system. The error detection code B is added to the status data.

FIG. 5 is a specific example of the synchronization signal and the transmission confirmation signal generated by the data processing device 2. The sync signal is shown in Figure 5.
As shown in (a), it is composed of a synchronization bit, a prefix bit, control data, and an error detection code. Here, the control data serves as a data request signal and a retransmission permission signal. For example, when the control data is all 1, the data request signal is set, and “0000011111” is set as the retransmission permission signal. Gauges that do not need re-transmission ignore this re-transmission enable signal. As shown in FIG. 5B, the transmission confirmation signal is composed of a synchronization bit, a prefix bit, a retransmission request signal and an error detection code. The retransmission request signal corresponds to each gauge bit by bit. For example, when the number of gauges is 24, the retransmission request signal has 24 bits, "0" indicates that the transmission is normally performed, and "1" indicates that retransmission is necessary.

Next, the operation of the system of the embodiment thus configured will be described. From the data processing device 2, for example,
As shown in FIG. 6, a synchronization signal is transmitted every 1 second,
All gauges 1 receive this synchronization signal. The receiving circuit 18 of the gauge 1 is intermittently controlled to turn on / off the power according to a synchronization signal sent every 1 second as shown in FIG. Actually, the continuous reception mode is set before the intermittent operation starts. This is shown in FIG. That is, in the gauge 1, when the power is turned on, the circuit is first initialized, the receiving circuit 18 is set to the continuous receiving mode, and the timer 24 is reset by confirming the synchronization signal. Then, when the synchronizing signal is continuously received and the time interval of the synchronizing signal is measured by the timer 24, the receiving circuit 18 receives the output of this timer and enters the intermittent receiving mode.

FIG. 8 shows how data is transmitted between the data processing device 2 and each gauge 1 when a synchronization signal including a data request signal is transmitted from the data processing device 2. When a synchronization signal including a data request signal for each gauge is sent from the data processing device 2, each gauge 1 discriminates the data request signal and puts the measurement data on the time slot assigned to each gauge 1 to the data processing device 2.
To transmit. For example, assuming that the data transmission rate is 4800 bps, the transmission data as shown in FIG.
Time slots for four gauges can be set.

In an actual system, other main circuit parts of the functional block of the gauge 1 shown in FIG. 2 except the transmission / reception circuit and the encoder, and the data processing device 2 shown in FIG.
A microprocessor is used for the other main circuit parts of the functional blocks except the transmission / reception circuit. The operation flow on the gauge 1 side when the microprocessor is used in this way is as shown in FIG.
The operation flow on the side is as shown in FIG. Below in Figure 9,
The operation flow of FIG. 10 will be briefly described.

In the gauge 1, as shown in FIG. 9, when the power is turned on at the start of measurement (S11), the synchronization signal is searched for in the received signal (S12), and the synchronization signal is confirmed as described above. Then, the receiving circuit is switched from the continuous operation mode to the intermittent operation mode. A more specific operation flow of this synchronization signal search is shown in FIG. That is, in the initial state, the receiving circuit is in the continuous operation mode in which the power is always turned on (S5
1) When a signal is received (S52), the presence / absence of a sync signal is determined (S53), and when the sync signal is confirmed, the timer is reset (S54), and then the receiving circuit waits for the cycle of the sync signal. The intermittent reception operation mode in which the power is turned on / off is set (S55).

Returning to FIG. 9, when the receiving circuit enters the synchronizing signal waiting state in the intermittent operation mode (S13) and the synchronizing signal is received (S14), whether the synchronizing signal includes the data request signal or not. It is determined (S15). When it is determined that there is a data request signal, the measurement data is fetched from the measurement circuit (S16), and the fetched measurement data is converted into the transmission data as described above (S17). Then, the converted transmission data is written to the data storage device (S18), the time slot assigned to itself is waited (S19), and the transmission data is parallel / serial converted (S20).
It is sent to the transmission circuit and transmitted (S21).

When data is transmitted, the transmission confirmation signal waits (S22), and when the transmission confirmation signal is received (S2).
3) Then, it is determined whether or not the transmission confirmation signal itself has an error (S24). If there is an error in the transmission confirmation signal, the transmission is performed again. If there is no error in the transmission confirmation signal, it is judged whether or not there is a retransmission request signal in it (S25). If there is no retransmission request, the next synchronization signal waiting state is entered, and the retransmission request is sent. In some cases, the transmission data stored in the transmission data storage device is read and retransmitted.

In the data processing device 2, as shown in FIG. 10, first, the system waits for the synchronization signal transmission cycle (S31), and it is determined whether or not there is a data request signal from the data processing circuit (S32). If there is not, a sync signal including no data request is transmitted (S33). If there is a data request, a synchronization signal carrying a data request signal is transmitted (S34). Then, it enters a state of waiting for a time slot (S35) and receives the transmission data sent from the gauge (S36). When the data is received, the error detection circuit detects an error in the data (S37). If no error is detected, the data conversion circuit converts the transmission data into measurement data (S38), and the measurement data is input to the data processing circuit (S39). If an error in the data is detected, the ID number of the relevant gauge is held in the retransmittable gauge ID storage circuit (S40).

After that, it is judged whether or not there is a non-communication gauge (S41), and if there is a non-communication gauge, it waits again for data reception, and the same operation is repeated. If it is determined that there is no uncommunicated gauge, the necessity of retransmission is determined (S42). If retransmission is not required, the retransmission request signal is used as it is, and if retransmission is required, the retransmission request signal is used as the transmission confirmation signal. They are added (S43) and a transmission confirmation signal is transmitted (S44).

As described above, according to this embodiment, the bidirectional wireless communication function is added between the many gauges 1 and the data processing device 2. Then, the data processing device 2 side transmits a transmission confirmation signal including a retransmission request to the gauge 1, and the gauge 1 automatically confirms the data transmission and retransmits when there is a transmission error. Also according to this embodiment,
The gauge 1 only needs to perform the measurement operation when there is a data request, and the receiving circuit 18 performs the intermittent receiving operation based on the synchronization signal sent from the data processing device 2, so that the average consumption of the gauge 1 is reduced. The power is very small. Therefore, the life of the button battery mounted on the gauge 1 is long.

[0026]

As described above, according to the present invention, a bidirectional communication function is added between a large number of gauges and a data processing device to automate the confirmation of data transmission, thereby improving measurement efficiency and data transmission processing. It is possible to obtain a measurement processing system in which the reliability is improved and the average current consumption is reduced by intermittently operating the gauge receiving circuit.

[Brief description of drawings]

FIG. 1 shows the configuration of a measurement processing system according to an embodiment of the present invention.

FIG. 2 shows a functional configuration of a gauge of the same embodiment.

FIG. 3 shows a functional configuration of a data processing device of the same embodiment.

FIG. 4 shows an example of a transmission data structure of the same embodiment.

FIG. 5 shows a configuration example of a synchronization signal and a transmission confirmation signal of the same embodiment.

FIG. 6 shows how a synchronization signal is sent and received in the same embodiment.

FIG. 7 shows a receiver circuit operation mode of the gauge of the same embodiment.

FIG. 8 shows a state of transmission and reception of transmission data according to the same embodiment.

FIG. 9 shows a control operation flow on the gauge side in the embodiment.

FIG. 10 shows a control operation flow on the data processing device side of the embodiment.

FIG. 11 shows the sync signal searching operation of FIG. 9 in detail.

[Explanation of symbols]

1 ... Gauge, 2 ... Data processing device, 11 ... ABS encoder, 12 ... Measuring circuit, 13 ... Data conversion circuit, 14 ...
Data storage device, 15 ... Transmission control circuit, 16 ... Transmission circuit, 17 ... ID setting circuit, 18 ... Reception circuit, 19 ... Sync signal separation circuit, 20 ... Data request determination circuit, 21 ... Transmission confirmation signal separation circuit, 22 ... Retransmission request determination circuit, 23 ...
Power control circuit, 24 ... Timer, 31 ... Reception circuit, 32 ...
Transmission slot separation circuit, 33 ... Error detection circuit, 34 ... Data conversion circuit, 35 ... Data processing circuit, 36 ... Data request signal generation circuit, 37 ... Synchronization signal generation circuit, 38 ... Timer.

Claims (1)

[Claims] 1. A measurement having a plurality of gauges for measuring the positions and the like of a large number of different points, and a data processing device which is apart from these gauges and which processes the measurement data sent from each gauge. In the processing system, each of the gauges includes a storage unit that stores measured data, a transmitting unit that transmits the measured data, a receiving unit that receives a transmission signal from the data processing device, and the data processing device. And a retransmit control means for controlling the data stored in the storage means to be retransmitted when a retransmit request is made, and the receiving means intermittently operates based on a synchronization signal from the data processing means. And a data processing device for processing the received data, wherein the data processing device receives the data sent from each of the gauges. And a signal generation means for generating a transmission confirmation signal including a retransmission request when the synchronization signal and the received data have an error, and a transmission means for transmitting the transmission confirmation signal together with the synchronization signal. Characteristic measurement processing system.