JPS61193300A - Sensor signal transmitter - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a sensor signal transmission device that transmits signals corresponding to the amount of sensors to various parts.

Conventional technology A conventional sensor signal transmission device of this type is shown in FIG.

The configuration was as shown in FIG. In the figure, sensor 1
A charging/discharging voltage generating section 102 whose charging time changes according to an analog value of 01; an interval timer 103 which generates a pulse for resetting the charging/discharging signal B of the charging/discharging voltage generating section 102 at regular intervals; A pulse generating section 104 that compares an internal set voltage signal C and a charging/discharging signal B of the charging/discharging voltage generating section 1o2 and generates a pulse signal while the voltage value of the signal C is greater than the voltage value of the signal B. and an external terminal 106 for transmitting the output signal to the outside.

In this way, asynchronous pulses are generated for multiple sensors by the respective interval timers 103, and the external receiving device is connected in parallel to the sensor transmission device for each sensor. ,
The output signals from each sensor transmission device are processed by time division in an external receiving device.

Problems to be Solved by the Invention With such a conventional configuration, when controlling air conditioning in a building, there are a large number of sensors, and the number of connections between each sensor transmission device and an external receiving device is large. The wiring cost is enormous, and the number of connection terminals on the receiving device side is large, which accounts for a large proportion of the price of the receiving device.

The present invention has been made in view of the above points, and has a simple configuration in which an external receiving device and each sensor signal transmission device are wired in series, thereby reducing wiring costs, and reducing the cost of external receiving devices. The purpose is to reduce the

Means for Solving the Problems In order to achieve the above object, the senna signal transmission device of the present invention includes a sensor, a charging/discharging voltage generating section whose charging time changes depending on an analog amount of the sensor, and a charging/discharging voltage generator. A pulse generating section that generates a pulse with a width corresponding to the charging time of the voltage generating section, an external terminal that transmits the pulse generated by the pulse generating section to the outside, and a self-address signal from the outside via the external terminal. A binary counter to which a clock signal is input, a binary data setting part in which a self address is set, and a plurality of ANDs each inputting a plurality of output terminals of the binary counter and a plurality of output terminals of the binary data setting part. a multi-input AND element in which the plurality of AND elements are connected to respective multi-input terminals, and a signal obtained by differentiating the output of the multi-input logic element to each of the charge/discharge voltage generating section and the binary counter. This configuration includes a differentiator connected to a reset terminal.

Effect With the above configuration, when the self-address signal receives a clock signal from an external receiving device, the circuit consisting of the binary counter, binary data setting section, multiple AND elements, multi-input AND element, and differentiator receives the binary data. It is compared with the self-address value set in the setting section, and if they match, the charge/discharge signal generated in the charge/discharge generation section is instantly reset, charging is started, and the pulse generation section is connected to the external terminal via the external terminal. A pulse corresponding to the analog amount of the sensor is transmitted to the receiving device. In this way, the external receiving device and each sensor signal transmitting device can be synchronized, making serial transmission and reception possible.

Embodiment FIG. 1 is a block diagram of a Senna signal transmission device according to an embodiment of the present invention.

In FIG. 1, the output of a charging/discharging voltage generator 102 whose charging time changes depending on the analog value of a sensor 101 is input to a pulse generator 104, and the output of this pulse generator 104 is received via an external terminal 105. sent to the device.

Further, the external terminal 105 is connected to the clock input section of the binary counter 1. A plurality of AND elements 3a to 3d each inputting a plurality of outputs of the binary counter 1 and a plurality of outputs of a binary data setting section 2 to which a self address is set output to a multi-input AND element 4.

The output of this multi-input AND element 4 is inputted via a differentiator 5 to the respective reset terminals of the charging/discharging voltage generating section 102 and the binary counter 1.

According to the above configuration, from the external receiving device to the external terminal 10
6, the clock signal to be used as a self-address signal is transmitted to the second
The signal is input to the binary counter 1 like signal A in the figure.

The parallel output of the binary counter 1 and the parallel output of the binary data setting section 2 are connected to AND elements 3a to 3d for each pit.
The outputs of the AND elements 3a to 3d are input to the multi-input AND element 4. The output of the multi-input AND element 4 is inputted to the charging/discharging voltage generating section 102 and the reset terminal of the binary counter 1 via the differentiator 5. The binary parallel output data obtained by converting the self-address signal transmitted from an external receiving device by the binary counter 1 and the binary data corresponding to the self-address set in the binary data setting section are connected to the AND elements 3a to 3d. If it matches with the multi-input AND element, the second
A pulse like signal B in the figure is generated, and the pulse signal C is differentiated by a differentiator S to reset the binary counter 1 and eliminate the pulse of signal B.

Further, the charging/discharging signal of the charging/discharging voltage generating section 1o2 is instantaneously reset by the pulse differentiated by the differentiator 6 as shown in the signal shown in FIG. The charge/discharge signal is compared with an internal set voltage E in the pulse generator 104 as shown in FIG. 2, and when the voltage value of the signal E is greater than the value of the signal, a pulse F is generated. . This pulse F is sensor 1
External terminal 105 as a signal corresponding to the analog amount of o1
I am trying to send it to an external receiving device via . As described above, if the self-address transmitted from the external receiving device matches the self-address set in the sensor signal transmission device, a pulse corresponding to the analog amount of the sensor is transmitted, and the external receiving device The timing with each sensor signal transmission device is arranged to enable serial transmission and reception.

Effects of the Invention As described above, according to the present invention, each sensor signal transmission device and an external receiving device are wired in series with an extremely simple circuit configuration to reduce the wiring cost and to connect the external receiving device. The cost can be reduced by significantly reducing the number of receiving devices and terminals.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a sensor signal transmission device according to an embodiment of the present invention, FIG. 2 is a waveform diagram of the same main part, FIG. 3 is a block diagram of a conventional sensor signal transmission device, and FIG. 4 is a block diagram of the same main part. FIG. 1... Binary counter, 2... Binary data setting section, 3a to 3d... AND element, 4... Multi-input AND element, 6. ...Differentiator, 101...Sensor, 1o2...
Charge/discharge voltage generation section, 104...Pulse generation section.

Claims (1)

[Claims] a sensor, a charging/discharging voltage generating section whose charging time varies depending on an analog quantity of the sensor, a pulse generating section generating a pulse having a width corresponding to the charging time of the charging/discharging voltage generating section, and the pulse generating section. an external terminal for transmitting pulses generated at the external terminal to the outside; a binary counter to which a clock signal is input as a self-address from the outside via the external terminal; a binary data setting section for setting the self-address; a plurality of AND elements each receiving a plurality of output terminals of a counter and a plurality of output terminals of the binary data setting section; a multi-input AND element having the plurality of AND elements connected to respective multi-input terminals; A sensor signal transmission device comprising: a differentiator that connects a signal obtained by differentiating an output of the multi-input AND element to a reset terminal of each of the charging/discharging voltage generating section and the binary counter.