JPH0334118B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for connecting multiple detectors using an autonomous signal confirmation transmission method for transmitting signals from high-density distribution detectors and the like using fewer wiring lines.

When transmitting signals from a large number of detectors distributed in a high density, the number of signal lines for transmitting the signals should be minimized, and the transmission section of each detector should be miniaturized to facilitate high-density arrangement. is required.

The present invention satisfies these requirements and at the same time
A procedure is performed to sequentially check the signals from each detector, thereby making it possible to change the speed at which multiple detectors are scanned, and to cope with differences in conversion speed due to different converters and switching of measurement accuracy. The present invention aims to provide a method for connecting multiple detectors using an autonomous signal confirmation transmission system that makes it possible to connect multiple detectors.

In order to achieve the above object, the method of the present invention connects a large number of detectors each equipped with a converter section that converts the measured quantity into a signal of an electrical quantity and an integrated transmitter section that transmits the signal. The modulation signal of the measurement data is transmitted from the control/demodulator of the information processing section to which the modulation signal of the measurement data is transmitted through the signal line. The confirmation signal and the control signal input from the detector that was transmitting the measurement data to the transmission section of the next stage detector through the control line, the transmission section of the detector into which the control signal was input. generate a gate signal at the detector to open the gate for outputting the measurement data from the converter of the detector;
By transmitting the measurement data to the control/demodulator of the information processing section through the signal line and repeating this sequentially for the detectors connected in series, the measurement data from the conversion section of each detector is time-divided through the signal line. It is characterized by the fact that it is transmitted by

The method of the present invention will be explained in detail below with reference to the drawings.

FIG. 1 shows the configuration of a detector used in the present invention. This detector includes a conversion section that converts pressure, temperature, and other arbitrary quantities to be measured into electrical quantities, and a transmission section that transmits the signal. We are prepared. It is desirable that these be mechanically separably joined by, for example, a plug and a socket, but they can also be connected fixedly by adhesive or the like. In particular, if the conversion section and transmission section are made separable, it becomes possible to use freely selected various sensors by replacing the conversion section.

The transmission section also includes an amplifier that amplifies the electrical signal from the conversion section, a modulator that modulates the signal using an FM modulation method or a pulse frequency modulation method, and a modulated signal that is the output of the modulator. and a gate control circuit that determines the output timing of the modulation signal. Each element of this transmission section employs elements that can be easily integrated, and the entire structure is formed into a single chip using integration technology to make it compact.

FIG. 2 shows the configuration of a transmission device in which n detectors are connected in series and the outputs of these detectors are transmitted in a time-division manner through a single signal line. The wiring in this transmission device consists of power lines and signal lines that are connected in parallel to all detectors, and control lines that connect each detector in series by wiring both sides of each detector. Consisted of. The above control circuit is used to determine the timing of signal output from each detector, and the above signal line is used for signal transmission to time-divisionally transmit the signal from each detector, and for receiving the signal. It is shared as a bidirectional line with the confirmation signal from the control/demodulator.

The information processing section, which is connected to the detector group by the power line, signal line, and control line, is connected to each detector by the power line to operate the power source, and receives frequency modulation from the detector group. a control/demodulator that demodulates the measurement data output from the device, outputs a confirmation signal for receiving the measurement data to the signal line, and outputs a control signal for controlling the transmission of the measurement data to the control line. The control/demodulator further includes a transfer unit that sequentially transfers the measurement data demodulated by the control/demodulator to a computer or the like for data processing.

The confirmation signal output through the signal line in the control/demodulator described above can be outputted at the same time interval to each detector, or at arbitrarily set time intervals for each detector. Good too. By making it possible to arbitrarily set the output timing of the confirmation signal, it is possible to change the speed at which multiple detectors are scanned, and to cope with differences in conversion speed due to different converters, switching of measurement accuracy, etc.

FIG. 3 shows the timing of gate control of the detector in the above transmission device. To explain the configuration of the control circuit, etc. of the gate and the operation of the transmission section with reference to the same figure, when sequentially outputting measurement data from a large number of detector groups, the measurement data from the i-1st detector On the other hand, as a confirmation signal of the measurement data from the control/demodulator, if the voltage of the signal line is lowered to -V _SS at time T ₀ as shown in Fig. 3, the confirmation signal processing circuit B in the transmission section of the detector (Fig. 1), the output point C of the circuit B
The signal changes from 0 to 1, and the control input signal to the i-th detector changes from 0 to 1 in synchronization with this timing. Then, due to the rise of the confirmation signal on the signal line at the subsequent time point _T1 , the signal at the output point C in the confirmation signal processing circuit B changes from 1 to 0, and accordingly, the Q output of flip-flop FF1 changes. It becomes 1. As a result, a gate signal is output and the gate shown in Figure 1 is opened, a modulation signal of the measurement data from the modulator is output, and the measurement data is transmitted to the control/demodulator of the information processing section through the signal line. Ru.

When the control/demodulator receives the modulation signal of the measurement data, demodulates it, and confirms it, the control/demodulator sends a confirmation signal indicating that the signal has been received to the -V _SS signal line. At the fall of this confirmation signal at _T2 , the signal at the output point C of the confirmation signal processing circuit B changes from 0 to 1, and the control input signal to the i-th detector becomes 0. Accordingly, the Q output of the flip-flop FF2 becomes 1, the output of the gate signal is stopped, the gate is closed, and the transmission of measurement data from the i-th detector is stopped. Further, the Q output of flip-flop FF2 becomes a control input signal to the next stage detector.

On the other hand, at the i+1st detector, T ₃
Due to the rising of the confirmation signal at this point, the signal at the output point C in the confirmation signal processing circuit B changes from 1 to 0, as in the case described above, and accordingly, the Q output of flip-flop FF1 becomes 1, and the gate signal is output, the gate is opened, and a modulated signal of measurement data is output through the signal line.

Thereafter, control input signals are sequentially transmitted to the next-stage detectors in the same manner, and finally the n-th detector is operated. As a result, a modulated signal of the measurement data is output on the signal line at the timing shown in Figure 3, and this is sequentially demodulated in the control/modulator of the information processing section. The measurement data of the detector can be detected by time division. Note that a signal corresponding to a confirmation signal is output from the control/demodulator to the first detector.

In the above-mentioned signal confirmation transmission, the signals from each detector are sequentially confirmed, and each measurement data is separated by a no-signal area, so it is easy to identify the detectors depending on the order. be. Furthermore, the sampling time for each detector can be freely changed by adjusting the time at which the confirmation signal is output. That is, by changing the scanning speed of the n detectors, it is possible to cope with differences in conversion speed due to differences in converters, changes in measurement precision, etc.

The above-mentioned detector group can be made into a pressure distribution detector by arranging them at high density on a plane, configuring the conversion part with a pressure transducer, etc., and embedding them in a flexible material etc. as necessary. In addition, if the converter is configured as a pressure and temperature detector, it can be made into a pressure and temperature combined sensing detector. Moreover, in this case, the utility value is extremely high in that a large number of detectors can be connected to the information processing section through several signal lines.

Note that the arrangement of the detectors is free, so there is also a method of use such as forming a group of detectors into a string and wrapping it around a three-dimensional object.

[Brief explanation of drawings]

Figure 1 is a block diagram showing the configuration of a detector used in the present invention, Figure 2 is a block diagram showing the configuration of a signal confirmation transmission device in which a large number of the above detectors are connected, and Figure 3 is a time-division signal confirmation transmission. FIG.

Claims (1)

[Claims] 1. A large number of detectors equipped with a conversion section that converts the measured quantity into an electrical quantity signal and an integrated transmission section that transmits the signal are connected in parallel by a signal line, and a control line is connected to the detector. Therefore, the control/demodulator of the information processing section is connected in series and the modulation signal of the measurement data is transmitted through the signal line, and the confirmation signal of the measurement data is sent through the same signal line, and the measurement data is transmitted. A gate signal is generated in the transmission section of the detector to which the control signal is input by a control signal inputted from the detected detector to the transmission section of the next-stage detector through the control line, and the gate signal is By opening the gate to output the measurement data from the conversion section, transmitting the measurement data to the control/demodulator of the information processing section through the signal line, and repeating this sequentially for the detectors connected in series, each detection A method for connecting multiple detectors using an autonomous signal confirmation transmission method, which is characterized by time-divisionally transmitting measurement data from a converter of a detector through a signal line.