DE1043645B - Device for measuring and monitoring the measured variables assigned to a large number of measuring points - Google Patents

Description

In the known devices for measuring and monitoring a large number of measured variables, the individual variables are switched one after the other via a measuring point switch to a measuring device, for example, and thereby display, register or regulate the respectively connected measured value a synchronous drive or clockwork automatically switched to the next measuring point at periodic intervals. It is now often desirable to pick out a certain measuring point at random during the operation of such a device and read the measured value there. This is only possible with devices that have τΛ one If there is a large number, for example 100 measuring points, it takes a few minutes until the same measuring point is switched back to the measuring device during the usual switching cycle read num specific measuring point, he has to pick out the desired measurement from the plurality of recorded curves and then find their ^one last recorded value. This method is rather laborious and time-consuming, and moreover, a recording measuring device for a very large number of measured quantities can only be produced with considerable effort. If, on the other hand, the measured variables are not registered and the operator wants to read a specific value, he has no choice but to wait at the measuring device until the relevant measuring point is switched on in the cycle of the measuring point switch. As already mentioned, this can take a few minutes if the relevant measuring point was displayed by the device just before the operator appeared. For many measuring tasks, however, it must be possible to intervene quickly by hand, and it is required here that the measuring point in question can be observed within a short time.

This is achieved in that, according to the invention, a known from telephone exchange technology Motor rotary selector is interconnected with a push-button control panel and one of the number of the selectable measuring points in the decadic number system corresponding number of push-button contacts is connected to corresponding contact circuits of the selector in such a way that when the push-button contacts are pressed to select a measuring point in the order of the digits of the measuring point number to be selected formed a latching point for the motor rotary selector and the latter thereby with his Run in that position is stopped, in device for measuring and monitoring

of a large number of measuring points

assigned measurands

Applicant:

Siemens & Halske Aktiengesellschaft,

Berlin and Munich,
Munich 2, Wittelsbacherplatz 2

Hans Siems, Karlsruhe,
has been named as the inventor

which the selected measuring point is connected to the measuring device.

A motor rotary selector is a selector that is driven by a high speed motor. Of the The motor consists of two magnets arranged at right angles to each other with a Unwound anchor in the form of a prismatic rod with lengthened at the ends in the direction of rotation Pole faces moved. On the axis of the armature there are two offset from each other by 180 ° Cams that alternately interrupt the power supply to the magnets as they rotate. (Such a Motor selector is for example in the magazine FTZ, 1953, Issue 6, p. 254.) The voter is characterized by the fact that when the Stromes starts up very quickly and that if z. B. both magnets via a contact of a switching arm of the drive motor are energized, stopped very suddenly and in a defined position can be. With the motor rotary selector, which is manufactured in series with 112 and 224 outputs., it is a very robust, interference-free device that is used for telephone exchange technology is mass-produced.

The invention is explained with reference to the drawings. In the drawings represents

Fig. 1 shows the block diagram of a device according to the invention,

803 67ί / 1 & 7

2 shows the circuit for the voter to sit still.

It is assumed that 100 Temperaturmeß / ⁷ should be monitored with one thermocouple each. A measuring device M with limit contacts is provided for monitoring. If the measured value is within the prescribed permissible limits, the pointer remains between the limit contacts and these are not actuated. If the permissible measured value of the measured variable in question is exceeded or not reached, the upper or lower limit contact is actuated and this triggers a flag flap with the number of the respective measuring point in the flag table Sch . Such devices are known per se. In the present case, a motor selector MW is used as a measuring point switch, which is incremented by a measuring point at periodic time intervals by an indexing unit P. The selector is used to connect the relevant measuring point to the measuring device and to connect the relevant flap relay in the Schauzeiohentableau. The indexing mechanism P bridges the two motor magnets of the rotary selector, for example, so that they are both energized and the selector is held in the position it has reached at the moment. Through a z. B. with the help of a clockwork or a synchronous motor operated switchgear, the connection is canceled at intervals of about 2 seconds for a few milliseconds, so that the selector switches to the next switch and automatically places the next measuring point on the measuring device.

A push-button control panel T for the selection of the measuring points is now connected to the selector. This tableau has a number of rows of pushbuttons corresponding to the number of selectable measuring points in the decadic number system. In the exemplary embodiment assumed, there are 100 measuring points, ie two-digit numbers (0 ... 99); there are accordingly two rows of ten snap fasteners. For example, if you want to select the measuring point 84, the button numbered 8 is to be pressed in the first row and the button numbered 4 is to be pressed in the second row. When the lower, not numbered key is pressed, the selector is started and the connection between the switching unit and the selector is interrupted. The selector now runs until the selected measuring point is connected to the measuring device, and is then stopped via a locking connection formed by means of two contact circles and two switching arms of the selector via the push-button control panel. In this position, both motor magnets receive power and the selector is suddenly stopped.

A circuit example for the production of such locking connections via the pressure switch panel is explained with reference to FIG. The motor magnets arranged at right angles to one another are designated with DM. WK denotes the contacts actuated by the cams of the armature during rotation. The start contact is on. K ₁ and K ₂ represent two contact tracks of the motor selector, on which the electrically and mechanically interconnected switching arms of the selector S ₁ and S ₂ slide. The pushbutton switches of a row of pushbutton panels 1, 2, 3, 4, 5 ... are connected to one contact track K _2. Every tenth contact of the contact "!: Tbahn" is connected to a bus line which leads to the relevant push-button switch, so that the one-contact contacts of each decade are connected to one another. Ten contacts of the contact track Κ _Λ are connected to each other and the individual decades are routed to the pushbutton switches of the first row of contacts on the pushbutton panel (row of ten). The push-button switches of the ten row are interconnected and create a bridge to the left rotary magnet (Fig. 2). In appropriate

ίο The switches in the right row are also connected to the right rotary solenoid. When a switch is operated in each of the tens and units rows, an electrical connection is established when the switching arms S ₁ , S _{2 are in a predetermined position}

established between points α and b . In this position of the switching arms, both magnets DM receive current and the selector stops suddenly. If, for example, the push-button switch 20 and the push-button switch 3 are actuated and the selector is started by pressing the An button, it will run until the switching arms are on the contacts 23.

With the means of the invention, a very simple device for monitoring the a very big one. Number of measuring points assigned measured variables obtained from mass-produced Share can be produced by appropriate interconnection. It can be a simple measuring device with limit contacts in connection with a display panel instead of an otherwise necessary very Complicated registration device can be used. The operator only needs in certain Observe time intervals the indicator tableau and determine which measured value within the networked Period has deviated from the setpoint. The relevant measuring point can be used if necessary by pressing the corresponding switches on the push-button control panel in a fraction of a second Connect to the measuring device and adjust the relevant measured variable to the Set the setpoint.

Claims (3)

Patent claims: 1. Device for measuring and monitoring the assigned to a plurality of measuring points Measured variables which are successively transferred to a measuring device with limit contact via a measuring point switch act, characterized in that a known from telephone switching technology Motor rotary selector with a push-button switch panel is interconnected and one number of corresponding to the number of selectable measuring points in the decadic number system Push-button contacts are connected to corresponding contact circuits of the selector in such a way that that when you press the push button contacts to select a measuring point in the order of Digits of the measurement to be selected digit number for the motor rotary selector formed a rest point and the latter is thereby stopped during its run in the position in which the selected measuring point is connected to the measuring device. 2. Device according to claim 1, characterized by the limit contacts of the measuring device, the operate a flag table with the flag assigned to the measured values. 3. Device according to claim 1 and 2, characterized in that an automatic indexing mechanism the motor selector advances by one measuring point in periodic intervals, but is temporarily rendered ineffective when the pushbutton control panel is pressed. Documents considered: German Patent No. 593 830; U.S. Patent No. 2,427,355; BBC publication »Telemetry equipment, according to the * Frequency variation method «, S - TFH - 7/1952, p. 4 = and 5. 1 sheet of drawings