JPH05759B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sensor output signal collection control device.

[Prior Art] A large number of various sensors are used in predicting damage to large structures, measuring crustal deformation, measuring temperature distribution in large reactors, and in various comprehensive monitoring systems in industry and medicine.

[Problem to be solved by the invention] However, each sensor requires a power cable, a signal extraction cable, a sensor activation/signal collection cable, and many other cables, especially when each sensor is arranged independently. In this case, the number of activation and signal collection cables required is equal to the number of sensors, which not only makes maintenance and handling of these cables considerably difficult, but also increases power consumption.

This invention was made in view of the above circumstances, and even when a large number of sensors are arranged independently, the number of cables for sensor activation, control, and signal collection is small, and therefore It is an object of the present invention to provide a sensor output signal collection and control device whose cables are easy to maintain and handle, and which consume less power.

[Means for Solving the Problem] Corresponding to this object, the sensor output signal collection control device of the present invention includes a circuit including a power source, a count pulse generator, and a reset device, and a plurality of sensors sharing the circuit. and a sensor control device provided in each of the sensors to control the sensor, the sensor control device including a pulse counter that counts pulses from the count pulse generator, and an address setting device that sets the address of the sensor. a comparator for inputting the signal from the pulse counter, a relay for continuing the sensor in the circuit, and a relay drive circuit for driving the relay; The present invention is characterized in that the relay is operated by the relay drive circuit of the corresponding sensor only when the address matches the sensor address, and the corresponding sensor is sequentially connected to the circuit in a time-sharing manner.

[Operation] The address of each sensor is set in advance in the sensor control device by the sensor address setting device. Next, sensors are selected in a time-sharing manner based on the sensor address.

[Example] Hereinafter, details of the present invention will be explained with reference to drawings showing an example.

The basic idea of the sensor output signal collection control device of this invention is to use a common circuit for activating or collecting signals for multiple sensors, and to sequentially operate each sensor in a time-sharing manner instead of keeping each sensor working all the time. The point is to call it out and make it work.

In FIGS. 1 and 2, 1 is a sensor output signal collection control device, and the sensor output signal collection control device 1 includes a plurality of sensors such as thermometers and strain gauges, one each placed at a large number of measurement locations. 2
a to 2n, and each sensor 2a to
Sensor control devices 3a to 3n such as CMOS/IC are provided corresponding to the sensor control devices 2n. These sensors 2a to 2n, sensor control devices 3a to 3n
is connected to a cable 5 housed in a sheath 4 via a relay to form a circuit. The cable 5 is connected to a power source 7, a count pulse generator 8, and a reset device 9 included in the data acquisition device 6. As shown in FIG. 3, the sensor control devices 3a to 3n include a sensor address setting device 11, a pulse counter 12, a comparator 13, a relay drive circuit 14, and relays 15a and 15b.

The operation of the sensor output signal collection control device configured as described above is as follows. First, the sensor address setting device 11 using a DIP switch, for example, sets each sensor 2a to 2 to
An address for n is set in each of the sensor control devices 3a to 3n. In this state, count pulses are input from the count pulse generator 8 to the pulse counter 12 through the cable 5c, as shown in FIG. Taking the sensor 2a as an example, the pulse counter 12 counts the input count pulses and inputs them to the comparator 13. The comparator 13 compares the input count number with a preset address of the sensor 2a, and if they match, activates the relay drive circuit 14. The activated relay drive circuit 14 is the relay 15a, 1
5b and connect sensor 2a to cable 5.
Connect a, 5b, and 5e. Thereby, the sensor 2a is connected to the power source 7 and the I/O device 10, the sensor 2a is activated, and outputs the measured signal.
When the next count pulse is input, the sensor 2a is disconnected from the cables 5a, 5b, 5e, the operation of the sensor 2a ends, and at the same time, the next sensor b is switched to the same process as described above. Works in the process. All sensors 2a
When the operations .about.2n have completed one cycle, the sensor output signal collection control device 1 returns to its initial state by a reset signal sent from the cable 5d. Sensors may be designated in order or randomly. The specified intervals of these sensors, data processing, display, data transfer for other data processing, etc. are all performed by a program.

[Effects of the Invention] In the sensor output signal collection control device configured as described above, since a large number of sensors use a common circuit, the number of sensor activation and signal collection cables can be reduced. These cables are easy to maintain and handle, and power consumption is low because starting power only needs to be supplied to the sensor at a designated address.

As is clear from the above description, according to the present invention, even when a large number of sensors are arranged independently, the number of cables for sensor activation and signal collection can be reduced. It is possible to obtain a sensor output signal collection control device that is easy to handle and consumes little power.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the configuration of a sensor output signal collection control device according to an embodiment of the present invention, FIG. 2 is an explanatory diagram showing the connection state of a sensor, a sensor control device, and a cable, and FIG. 3 is an explanatory diagram of a sensor output signal collection control device according to an embodiment of the present invention. The configuration explanatory diagram and FIG. 4 are diagrams showing the operation timing of the sensor output signal collection control device. 1...Sensor output signal collection control device, 2a-2
n...sensor, 3a-3n...sensor control device,
5a-5e...cable, 6...data acquisition device, 1
1...Sensor address setting device, 12...Pulse
Counter, 13... Comparison calculator, 14... Relay drive circuit.

Claims (1)

[Claims] 1 A circuit including a power source, a count pulse generator, and a reset device, a plurality of sensors that share the circuit, and a sensor control device provided for each of the sensors to control the sensor, The sensor control device includes a pulse counter that counts pulses from the count pulse generator, an address setting device that sets an address for the sensor, and a pulse counter that counts pulses from the count pulse generator, an address setting device that sets an address for the sensor, and
A comparison calculation device that inputs a signal from the counter, a relay that connects the sensor to the circuit, and a relay drive circuit that drives the relay, the signal being input from the pulse counter to the comparison calculation device. The relay drive circuit of the corresponding sensor operates the relay only when the address matches the sensor address, and the corresponding sensor is sequentially connected to the circuit in a time-sharing manner. Sensor output signal collection control device.