JPS60214098A - Telemeter system unit for measuring factors of rotor - 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 [Technical Field of the Invention] The present invention relates to a measurement telemeter system that measures and controls various quantities of a rotating device, such as temperature, pressure, and flow rate, in a non-contact manner.

[Prior art]

As a conventional device of this type, the one shown in FIGS. 4 and 5 is rare. The configuration of this system device, as shown in Fig. 4+b, includes a sensor (4) composed of a thermocouple, a multiplexer (5), two transmitting circuits (7), and a receiving circuit (b).

It consists of a recorder σ◆, of which a sensor (4) and a multiplexer (manufactured by Co., Ltd.) are incorporated into the rotating part.

They are a transmitting circuit (7) and a transmitting antenna (9). Figure 5 shows the assembled state, in which an oscillation circuit (7) and a battery (6) serving as its power source are installed in the four parts or through holes formed on the side of the holder (2) into which the rotating shaft (2) fits. ,
A multiplexer (2) is also installed. The multiplexer (2) is connected to the other end of a sensor (4) whose one end is led to the measuring section, and the oscillation circuit (7) is connected to a transmitting antenna (9) attached to the outer circumferential surface of the holder □□□.
It is connected to the. Note that the receiving antenna O0 is provided in the stationary part at a predetermined distance from the transmitting antenna (9).

In such a configuration, the multiplexer region time-divides the sensor output, and the scanning time can be set to a time that is easy to record by changing the resistance element outside the multiplexer. Through this multiplexer (2), signals for each channel are sequentially sent to the transmitting circuit (7). The receiving circuit (7) chops this signal at a predetermined frequency and sends it to the AC amplifier.
The frequency proportional to the voltage is further transmitted as an FM wave through a y8e number oscillator. Transmission antenna (9)
It is desirable that the distance between the antenna and the receiving antenna QQ be close. The receiving circuit (b) receives and demodulates the FM signal, removes the chopped signal, and outputs it as an analog voltage to the recorder σ.
Send to Kun.

Since the conventional device is configured as described above, it has the following drawbacks.

(1) After converting the signal from the sensor to voltage/frequency using Chotu/f, the output of the oscillator is frequency modulated, so the accuracy of the frequency modulation of the voltage/frequency converter 1 and the frequency/voltage converter on the receiving side are Accuracy determines measurement accuracy.

(2) Since a battery is used as a power source for the above-mentioned oscillator, once it is discharged, it is necessary to convert and recharge the R battery.

(3) In addition, when supplying external power to the oscillator described above using a slip ring method, noise and arcing occur, so it is difficult to supply a stable power supply with high accuracy. Moreover, this will have an adverse effect (malfunction) on the oscillation section, and it is necessary to take measures to eliminate noise and arc.

(4) Furthermore, in the case of the slip ring method described above, it is impossible to use it in a hazardous environment due to the structure of the slip ring.

[Summary of the invention]

This invention was made in order to eliminate such conventional drawbacks, and it digitizes the measurement signal from the sensor and transmits it digitally, and also supplies power to the oscillation circuit with a generator that generates electricity by the operation of a rotating body. By using the output of the generator to charge the battery that supplies power to the oscillation circuit when the oscillation circuit is stopped, the accuracy is high (and the noise resistance is also strong, making it easy to replace the oscillation circuit battery. The purpose of this project is to provide a telemeter system that can perform continuous measurements without any problems.

[Embodiments of the invention]

An embodiment of the present invention will be described below based on the drawings. 1st
In the figure, (1) is a rotating body such as a rotary dryer that rotates and dries materials stored in a container, and (2)
is a bearing stand that rotatably supports the rotary body (M (3) fixed to it).
) ◎ (April) Rotating body (1) Internal various sensors 7 such as temperature, pressure, etc. It is a small field-type generator, and its armature is fixed to a rotating body (1), and a one-rotation field (not shown) is rotatably supported on the inner circumferential side of the armature. Electric power is generated in conjunction with the rotational movement of 1).

A battery (6) is charged by the small generator (5) and serves as a power source for the transmitting circuit (7) when the rotating body (1) stops operating and the small generator (5) does not generate electricity. (7)
converts the analog signal from each sensor (4) into a digital signal and sends it to the transmitting antenna (9) via the coaxial cable (8).
As shown in FIG. (a) The amplifier connected to the small generator (5).

Reference voltage generator (c), scanner (c), scanner)
An amplifier (to) that amplifies the output of an analog/digital (hereinafter referred to as "to") that converts an analog signal into a digital signal.

Parallel/Series (hereinafter referred to as P/S) converter (hereinafter referred to as P/S) (referred to as A/]) converter (hereinafter referred to as P/S), one combination circuit (e), controller (a) two frequency modulators
◇It consists of 1 oscillator) and an amplifier). In addition,
As shown in Figure 2, the output of the small generator (5) is used as a power source for each block and is also used to charge the battery (6), and the battery (6) is connected to the output of the small generator (5). It is used as a power source for each block if it is not available.

Next, in FIG. 1, (to) is a receiving antenna installed at a position separated by a predetermined distance from the transmitting antenna.

The received signal is sent to the receiving circuit (2) via the coaxial cable αυ.
). (2) C14 is a display and a recording unit that receives the output from the receiving circuit (2) and displays or records the measured value. As shown in Figure 8, the receiving circuit (b) includes a high frequency amplifier (2) that amplifies the signal from the receiving antenna α, a mixer), an intermediate frequency amplifier), an FM demodulator, and a comparator. , automatic frequency controller) 1 local oscillator θ
F, series/parallel (hereinafter referred to as S/P) converter - several circuits ■, controller, selector required, latte circuit - example, digital/analog (hereinafter referred to as S/P).

It consists of a converter (referred to as D/A) ~φη, an isolation amplifier LL amplification circuit, and the like. A display shown in FIG. 1 is connected to the insulated amplifier 11@, and a recorder a4 is connected to the amplifier circuit.

In addition, in FIG. 1, the sensor (4) to the transmitting antenna (
9) is attached to the rotating body (1) side, and the receiving antenna (1) is attached to the rotating body (1) side.
0 to recorder 04 are provided in the stationary part. Further, the generator (5) 2 and the transmitting circuit (7) are housed in a flameproof or intrinsically safe explosion-proof case, so that they can be used even in hazardous environments. It would be better if the antenna part also had an intrinsically safe explosion-proof structure.

In the device configured in this way, when the rotating body (1) rotates, the generator (5) generates electricity, floating charges the battery (6), and also connects the transmitting circuit (
7). Further, while the rotating operation of the one-rotator (1) is stopped, power is supplied from the battery (6) to the transmitting circuit (7).

Various quantities inside the rotating body are detected by a sensor (4) and input to a transmitting circuit (7) constituting a telemeter transmitter.

Multi-input analog signal 1 from sensor (4) For example, temperature detection signal is the amplifier shown in Fig. 2? υ, the pressure detection signal is inputted to an amplifier (lζ), switched by a scanner (e), and converted into a digital quantity by an A/D converter). The signal converted into a digital quantity is P/S converted by a P/S converter to become a temporally serial signal, and the signal is sent to the controller in the combination circuit 4 with the synchronization signal generated from the controller. After being combined, the signals are modulated by a frequency modulator Op, power amplified, and sent to a transmitting antenna (9) via a coaxial cable (8).

The receiving antenna σq receives this signal and sends it to the receiving circuit (2) via the coaxial cable 4. Receiving antenna (L□
The induced high frequency voltage is amplified by a high frequency amplifier. The amplified high-frequency voltage and the high-frequency voltage from the local oscillator (b) are mixed by a mixer (6) and converted to an intermediate frequency, which is then amplified by an intermediate frequency amplifier), and frequency shifted by an FM demodulator. demodulated into a DC voltage proportional to

The DC voltage is separated by a comparator into a data signal and a synchronization signal, and the 7 data signals are -9-/)l? 〇On the other hand, the synchronous signal is counted by the controller (to), and if there is no synchronous signal for a certain period of time, it is converted to a parallel signal by the S/P converter.
Sends a latch signal to the S/P converter and latches the output data of the S/P converter. This output data includes two types of code pulse data for distinguishing the type of signal and pulse data representing the amount.

The type designation data from the selector Q5υ is checked with the code pulse in the match circuit @Y, and if they match, a latch signal and a data signal are sent from the match circuit 1 to the latch circuits 052 to 052. The pulse data stored in the latch circuit lines is converted into analog by the D/A converter and sent to the display and recorder rA4 for measurement and display.

As described above, the above embodiment adopts a total digital modulation system characterized by a digital multi-channel transmission system, and also detects data pulse loss or disappearance in FM radio wave transmission.2 Generator stop detection and standard It also enables self-check functions such as detecting data abnormalities by transmitting signals. In addition, in a plant where a rotating body (1) repeatedly rotates and stops, continuous measurement can be performed without replacing the battery (6) by adjusting the charging and discharging time.

In addition, the above-mentioned example is 2, for example, the temperature of a rotary dryer.

Although the case of detecting pressure has been described, the present invention is not limited to this, but can also be used to measure temperature, pressure, and other quantities in a reaction vessel or the like in which materials are chemically reacted.

It can be used for speed measurement, equipment diagnostic measurement, and measurement of moving objects or equipment that cannot be directly wired, including temperature, strain, pressure, vibration, and torque.

Acceleration, voltage, amount of change that can be converted into a drowsiness signal, etc.

can be used for most measurements.

〔Effect of the invention〕

As described above, according to the present invention, the following effects can be obtained.

(1) By digitizing the telemeter, it is possible to perform multi-channel, multi-point measurements, and it is also highly accurate and has strong noise resistance.

(2) By preparing a generator and a battery as a power source for the transmitting circuit and adopting a floating charging method, battery replacement can be made unnecessary.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. FIG. 2 is a block diagram showing an example of the configuration of the transmitting circuit in FIG. 1, FIG. 8 is a block diagram showing an example of the configuration of the receiving circuit in FIG. 1, and FIG. 4 is a block diagram showing a conventional telemeter device. ,
FIG. 5 is a sectional view showing a state in which the telemeter device shown in FIG. 4 is assembled into a rotating part. Note that the same reference numerals in the figures indicate the same or corresponding parts. In the figure, (1) is a rotating body, (4) is a sensor, (5) is a small generator, (6) is a battery, (7) is a transmitting circuit, (September transmitting antenna, QO is a receiving antenna, ( A) is a receiving circuit, (C) is a scanner, @ is an analog/digital converter, (C) is a parallel/serial converter, (F) is a serial/parallel converter, -~←η is a digital/analog converter Agent: Masuo Oiwa

Claims (2)

[Claims] (1) Transmit the detection signal of the sensor installed on the rotating body from the transmitting antenna to the receiving antenna installed on the stationary part, @
In a telemeter system for measuring various quantities of a rolling object, the transmitting circuit converts an analog signal from a sensor into a digital signal and sends it to the transmitting antenna, the receiving circuit converts the digital signal from the receiving antenna into an analog signal, and the above. A generator provided on a rotating body generates electricity through the operation of the rotating body and supplies power to the transmitting circuit, and a battery is charged with the output of the generator and supplies power to the transmitting circuit when the rotating body stops operating. A telemeter system for measuring various quantities of rotating bodies. (2) The transmitting circuit consists of a scanner that scans analog detection signals from a plurality of various sensors, an analog/digital converter that replaces the analog signal with a digital signal from this scanner, and a temporal converter that converts the digital signal of the analog/digital converter into a digital signal. The receiving circuit includes a serial/parallel converter that simultaneously transfers the temporally serial digital signals received by the receiving antenna, Claim 1, characterized in that it has a digital/analog converter that converts a digital signal into an analog signal.
A telemeter system device for measuring various quantities of a rotating body as described in 2.