JPS6131410B2 - - Google Patents

Description

[Detailed description of the invention]

[Technical field to which the invention pertains] The present invention relates to a dot type multi-point recorder having a measuring point switching means for switching a measuring signal input terminal to various measuring points, and a dotting wheel connected to the measuring point switching means. Regarding. [Prior art and its problems] FIG. 7 is a diagram for explaining the outline of a conventional multi-point recorder disclosed, for example, in Japanese Patent Application Laid-Open No. 51-57463. In the figure, MO is a synchronous motor and a gear Z ₁ is attached to the motor shaft A ₁ .
The gear Z ₁ always rotates a hitting cam NS, which will be described later, at a constant speed via the gear Z ₂ and its gear shaft A ₂ . A driving wheel MZ of a Geneva mechanism SZ is further fixed to the electric motor shaft _A1 , and this driving wheel MZ intermittently rotates a driven wheel FZ. Note that the driven vehicle FZ is designed to rotate 1/6 per revolution of the driving vehicle MZ. Gears Z ₃ and Z ₅ are attached to the rotating shaft A ₃ of the driven wheel A 3, and the gear _{Z 3 meshes} with the gear Z ₄ , and the gear Z ₅ meshes with the gear Z ₆ . Gear shaft A ₄ of gear Z ₄
A keyway Y is formed in order to rotate a worm which will be described later, and a gear shaft _A5 of a gear _Z6 switches the contact point of a measurement point switch S according to the measurement point. FIG. 8 is a schematic sectional view of the dotting mechanism of this known multi-point recorder, FIG. 9 is a plan view of the dotting wheel H in FIG. 8 with the dotting wheel H removed, and FIG. FIG. 3 is a partially sectional front view of the dotting mechanism shown in the figure. In FIGS. 8 to 10, D is a base frame fixedly provided to the machine frame of the recorder, and two substrates D ₁ and D ₂ arranged in parallel and these substrates D ₁ and D ₂ are connected to each other. It consists of a connecting board _D3 that connects the Although not shown on the substrates D ₁ and D ₂ ,
Through-holes are formed at opposing positions, and bearing bodies L each formed in a hollow cylindrical shape are attached to these through-holes by screws. E is a dot frame, which is composed of side frames E ₁ and E ₂ arranged in parallel and a connecting frame E ₃ that connects the both side frames E ₁ and E ₂ , and the both side frames E ₁ and E ₂ are opposite to each other. A hole is drilled in each position. The diameter of this hole is approximately the same as the diameter of the through holes formed in the substrates D ₁ and D ₂ . This dot frame E is
A bearing body L is loosely fitted into each hole, and is therefore swingable about the bearing body. F is a worm which is disposed between the frames E ₁ and E ₂ on both sides of the dot frame E and is rotatably supported by a bearing body L, and is formed into a hollow cylindrical shape.
Worm teeth FA and FB are formed on the outer peripheral surface of this worm F, and these worm teeth FA and FB are formed on the outer peripheral surface of the worm F.
Each of the FBs is shaped in a spiral shape at its center and along the circumference of the worm F at both ends thereof. Moreover, at that time, worm teeth
FA and FB are trough FD by their ends
are arranged so that a is formed. This warm F
The hollow part consists of a large-diameter hollow part formed on both sides and a small-diameter hollow part formed between them, and the inner diameters of both large-diameter hollow parts are formed to have the same diameter and to match the outer diameter of the bearing body L. The small-diameter hollow part is equipped with a key protrusion. The gear shaft A 4 of the gear Z ₄ shown in FIG. 7 is inserted into the hollow portion of the worm F, and _{the key groove Y of the gear shaft A 4 is} engaged with the key protrusion. Therefore, the worm F is rotated in accordance with the rotation of the gear shaft _A4 . A fixing pin J is attached to the connecting frame _E3 of the dot frame E, and a mounting member G is rotatably fitted onto the fixing pin J. A worm wheel GH that meshes with the worm F is formed at one end of the mounting member G. One of the troughs of the worm wheel GH first meshes with the worm tooth FA of the worm F, and when the worm F rotates half a rotation, The next valley portion meshes with the worm tooth FB.
Therefore, the worm wheel GH moves two steps per revolution of the worm F, but when the peak of the worm wheel GH is located within the valley FD of the worm F, the peak of the worm F moves forward. FA or FB
Since the stepping action on the worm wheel GH does not work, even if the worm F is rotating, it is stopped. H is a dotting wheel in which an ink pad HZ and a stamp HC are integrally molded, and has 12 such stamps HC along the circumference. This dotting wheel H is attached to a mounting member G by a fixing member I. M is an index plate made of a transparent material, the index part MA, this index part MA
It consists of a front part MB supporting the front part MB and both legs MC extending on both sides of the front part MB,
It is fixed to both substrates D ₁ and D ₂ of the base frame D by ON. MD is an indicator colored in red in the indicator part MA. EW is a bearing body attached to the dot frame E, and this bearing body engages with a lever C that is swingable about a fulcrum _A6 . This lever C
A protrusion B is provided at the tip of the cam NS, and this protrusion B swings on the cam surface of the dot cam NS. SP is a spring that pulls the dot frame E in the direction of arrow _P2 . K is a recording paper feed roller, and L is a recording paper. Next, the operation of the above configuration will be explained. First of all,
In the initial state, the peak of the worm wheel GH is placed within the valley FD of the worm F. When the worm F is rotated by half a rotation by the synchronous motor M via the Geneva mechanism SZ, the worm wheel GH is advanced by one step, and the dotting wheel H comes to the dot position where the next mark HC is placed. At this time, the trough FD of the worm F meshes with the peak of the worm wheel GH, as in the initial state. In this state, when the cam NS rotates in the direction of arrow _P1 and the protrusion B of the lever C enters the notch KP, the lever C swings counterclockwise and at the same time, due to the tension of the spring SP. The dot frame E is rotated clockwise. Thereby, the mark HC of the dot wheel H records a dot on the recording paper L. Thereafter, the swing lever C is returned to its original state by the rotation of the cam NS, and the dot frame E is also returned to the state shown. In this way, one point-scoring operation is completed. As mentioned above, the dotting wheel H of the dotting mechanism shown in FIGS. 7 to 10 has 12 markings HC, and can be used for 12 measuring points.
One measuring cycle is completed by performing the above-mentioned dotting operation 12 times. Incidentally, there may be cases where it is desired to use such a multi-point recorder configured for 12 measurement points, for example, for 6, 8, or 10 measurement points. In such a case, for example, if the system is for 6 points, the measurement signal input terminals of the remaining 6 points should be in an open state where no measurement signal is applied, and if the system is for 8 points, the measurement signal input terminals of the remaining points should be set to an open state where no measurement signal is applied. Leave the ends open as well. By doing this, each stamped HC performs a dotting operation during one measurement cycle, and the dotting operation is repeated 12 times in total, but the remaining 6 points (or 4
The mark corresponding to the measurement signal input terminal (point) indicates the measurement value 0.
% or less on recording paper. Therefore, temporal changes in measured values at the selected six (or eight) measurement points are recorded on the recording paper. In this way, in the multi-point recorder shown in FIGS. 7 to 10, even though only six measurement points are selected, the dot wheel H is not synchronized due to the structure of the multi-point recorder. It must be rotated via the electric motor MO and Geneva mechanism SZ to perform 12 dotting operations, and the dotting operations and dotting time for the remaining 6 measurement points that have not been selected are completely wasted. . Therefore, as shown in FIG. 11, the measurement point is switched via a Geneva mechanism SZ driven by a synchronous motor MO, and the dot wheel is also rotated via the shaft _A4 , which is also driven by the Geneva mechanism. , so that the colors of the connected measurement points and the records corresponding to them always match each other is the same as the above-mentioned known method, but as shown in detail in FIG. 12, the intermediate gear Z ₇ is A dot recorder is known in which the connection between the gear Z ₃ and the gear Z ₈ can be released. That is, in this dot recorder, the shaft A ₆ of the intermediate gear Z ₇ is pressed by a spring, for example, and by releasing the spring pressure, the intermediate gear Z ₇ is connected to the gears Z ₃ and Z ₈ . The mesh can be released. As a result, the Geneva mechanism is no longer
The rotation of SZ is not transmitted to the gear Z ₈ , i.e. to the measuring point changer S, and to the axis A ₄ (i.e. to the dotting wheel H), so that only a single measuring point is always selected and repeatedly recorded. . In this way, with the dot recorder shown in Fig. 11, it is possible to perform the dot operation only on the markings corresponding to a single selected specific measurement point, so for example, it is possible to With the configured dot recorder, it is possible to eliminate the waste of performing dot operations on the remaining 11 measurement points that have not been selected. By the way, as explained with respect to the dot recorders shown in Figs. In addition, there is a demand for selecting multiple measurement points. However, in such a case, the dot recorder of FIG.
This cannot be applied because only a single measurement point can be selected. In order to satisfy such requirements with the dot recorder shown in FIG. 11, it is necessary to use the dot recorder shown in FIG. 7. [Object of the Invention] The present invention provides a dot-type multi-point recorder of the type described at the beginning, which can meet the above-mentioned requirements, and also allows the dot wheel to perform dot-dotting operations for unselected measurement points. The goal is to avoid having to do so. [Summary of the Invention] In order to achieve such an object, the present invention has the following features:
A measurement point switching means for switching a measurement signal input terminal to various measurement points, a servo amplifier to which individual measurement signals are supplied via the measurement point switching means, a servo motor driven by the servo amplifier, and An automatic balancing mechanism consisting of an angular position-to-voltage converter that converts each angular position of this servo motor into a voltage signal and supplies it to the servo amplifier, a dotting wheel, an angular position setting motor of this dotting wheel, and a dotting electromagnet. a dotting mechanism to which the rotary motion of the servo motor is transmitted via a rotary motion transmitting means and moved to a position according to a measurement signal; and a control circuit for controlling the measuring point switching means and the dot wheel angle position setting motor. and, the dot wheel angle position setting motor comprises a stator consisting of alternating field poles and auxiliary poles, a rotor consisting of diametrically magnetized permanent magnets, and a winding of the field poles. controlling the measurement point switching means and the dot wheel angle position setting motor in order to connect the lines into a polygon and cause the dot wheel to start from the respective angular position and directly reach each newly set angular position; It is characterized by being controlled by a common code by the circuit. According to the present invention, a plurality of desired measurement points are selected from a large number of measurement points given in advance,
The dotting operation can be performed only on the markings on the dotting wheel corresponding to the selected plurality of measurement points. In that case, of course, the markings on the dot wheel corresponding to the unselected measurement points do not perform the dotting operation. [Description of embodiments] As an angular position setting motor for a dotting wheel, the stator has field poles arranged alternately, the windings of the field poles are connected in a polygonal manner, and the rotor is a diametrically magnetized permanent motor. The use of motors consisting of magnets is advisable. Advantageously, the rotor has a pole cap of such width that it faces each one field pole of the stator and its adjacent auxiliary pole. In a preferred embodiment, in a point-scoring multi-point recorder used for up to 2n measurement points, the angular position setting motor of the point wheel is provided with n field poles and n auxiliary poles. The windings of the field poles are connected in an n-gon configuration. The control code is an n-bit code,
Each bit position of the code corresponds to a corner of the n-gon connected winding. Here n is an odd number. In a dot type multi-point recorder used for measuring up to 6 points, the motor for setting the angular position of the dot wheel is provided with three field poles and three auxiliary poles, and the winding of the field pole is triangular. connected to. Under the premise that n is an odd number, the basic structure of the angular position setting motor of the dot wheel and the circuit principle of the electronic circuit necessary for its control can also be applied to a dot recorder used for measuring any number of 2n points. That applies. Using a one-step code as the code serves the purpose. The dotting wheel may have to rotate 180°, but in order to ensure that the motor can start correctly even during this 180° rotation step, the operating voltage is applied to the corner of the field pole winding. The push-pull drive circuit is rotated by one bit for the code word corresponding to the selected measurement point at the arrival of the first phase clock of the two-phase clock via a data selector controlled by the two-phase clock. It is controlled by a code word and, when the second phase clock arrives, by a code word corresponding to the selected measuring point. In this way, by using a two-phase clock control system in which the rotated code precedes and the unrotated code follows, it is possible to set angles larger than 180°-n-1/4n or 360°. Setting steps larger than n+1/2 times the unit step are never performed at one time (where n is again the number of field or auxiliary poles). In the case of operation with an internal code generator, the output code word of the code generator, which is applied to the address input of the multiplexer, is generated via a logic circuit from the output signal of the measuring point selector, which is applied to the data input of the multiplexer. derive a signal to advance or block the device. It is expedient for the code generator to be constructed as a kind of ring counter. While cyclically scanning measurement point addresses that have not been selected in advance, an inhibit signal issued from the logic circuit to the decoder and the two-phase clock control circuit electrically controls the measurement point switching means and the angular position setting motor of the dot wheel. It is advantageous to separate it from the code generator. To enable measurement point selection via the computer or system bus, the output signal of the internal code generator and the external code signal are routed via a code selector. [Embodiments of the Invention] Examples of the present invention will be described below with reference to the drawings. In FIG. 1, a measuring transducer 1 to which variable measured values of various measurands are applied at its input end is connected at its output end to a number of measuring point switching relays 2. The points can be individually connected to the input ends of the servo amplifier 3. The servo amplifier 3 together with a changeover switch 4 connected to it, a subsequent servo motor 5 and an angular position/voltage converter 6 which converts the respective angular position of the servo motor into a variable reference voltage constitutes an automatic balancing system. is formed.
An endless belt 51 guided via deflection rollers 52 and 53 transmits the movement of the servo motor 5 to a dotting mechanism consisting essentially of a dotting wheel angular position setting motor 7, a dotting electromagnet 8 and a dotting wheel 9. The recording paper 10 is moved by a recording paper feed motor 11 via a pinned roller on the lower side of the dotting wheel 9 so that the feeding motion of the recording paper and the running motion of the dotting mechanism are perpendicular to each other. Chart paper feed motor 1
1 is a step motor in the embodiment, and is driven via a step motor control circuit 13. The output pulse of the clock 12 is the step motor control circuit 1.
3 and control circuit 14. The time progression of the dot recorder is controlled via the control circuit 14 and via the connection lines to the changeover switch 4 and the measuring point changeover relay 2 as well as to the dot electromagnet 8. Separated control circuit 15 (FIGS. 5 and 6)
(shown in detail in the figure) controls the angular position setting motor 7 of the dotting wheel 9. The measurement point selector 16 is used to preselect measurement points to be selected for recording. FIG. 2 shows in a time chart the various time courses during the measurement and recording of the measured values of two successive measuring points. In the first line, the time during which the measuring point m or m+1 is connected to the input end of the dot type multi-point recorder is indicated by diagonal lines. In the second line,
Based on the operating principle of a self-balancing dot recorder, the time used for the self-balancing operation for bringing the dot wheel 9 to a position corresponding to the measured value of the measuring point for the same measuring point is shown. . Such an automatic balancing operation takes place in each case during the second half of the total connection time of one measurement point. The third line shows that the angular position of the dotting wheel is set in approximately the first half of the automatic balancing operation time. In the fourth line,
The time required for the dotting action itself is shown. It should be noted here that the dotting operation for the measured value of the preceding measuring point is carried out during the entire connection time of the next measuring point. In the first row, a narrow gap can be seen between the diagonal lines indicating the times when the individual measuring points are connected to the input of the dot recorder. As shown in the fifth line, a scanning process for switching the measurement points is sandwiched between these gaps, and in this scanning process, the circuit elements included in FIG. , a multiplexer, a gate circuit and a pulse distributor, the measurement points preselected for recording are accessed in the measurement point selector. The sixth line shows the clock signal for controlling the above-mentioned process. However, the scanning process in row 5 is controlled by a significantly higher frequency clock signal (not shown in FIG. 2). FIG. 3 shows a principle sectional view of the motor for setting the angular position of the dotting wheel. Stator 31 has field poles 32 and auxiliary poles 33. Field pole 32
are provided with windings 34 which are triangularly connected to each other. The rotor 35 has two pole caps 36. The rotor 35 consists of a diametrically magnetized permanent magnet passing through the center of the pole cap. The left and upper field pole windings 34 are energized as indicated by the direction of current flow. The lines of magnetic force that occur during the illustrated excitation are marked in the rotor by curved arrows. Straight arrows indicate setting forces. The combined force (thick line) is oriented in the same direction as the magnetization direction of the rotor. In FIG. 4, the motor is shown in six different rotor positions. The corners of the triangular connections of the field pole windings are marked with capital letters A, B, and C. Below the diagram showing the motor at each rotor position, a vector diagram of the field current flowing in the windings in each case is shown. The corners of the vector triangle are labeled A, B, and C, corresponding to the feeding points of the triangular connection of the windings. Number 1 in the corner of the vector triangle
and 0 are also attached, and the number 1 indicates the operating voltage,
Also, the number 0 means ground potential. The correspondence of the numbers to the order of the capital letters A, B, C represents the code for the respective rotor position. That is, one of the six rotor positions is uniquely defined by a 3-bit binary word. However, the combinations 000 and 111 are excluded because all three corners of the triangular connection have the same potential and no current flows through all of the windings. The six possible positions of the rotor are shown in degrees. The direction of the magnetic field lines from each field pole is marked with an arrow. R ₁ in the direction of the combined magnetic field lines
or _R6 . The magnetization direction of the rotor is indicated by the NS direction. The table below shows parameters for each measurement point, corresponding to FIG. The code for each position is written in the third column from the right, and the code obtained by rotating the code to the left by one bit is written in the rightmost column. The second column from the right shows the decoded decimal equivalent number.

〔Effect of the invention〕

As explained above, in the present invention, the measuring point switching relay 2 and the motor 7 that sets the angular position of the dotting wheel 9 are controlled by a common code, and the dotting wheel 9 is set to the respective angular position. It starts from , and directly reaches each newly set angular position. Therefore, according to the present invention, the dot wheel 9
In this case, the dotting operation is only performed at a plurality of measurement points selected in advance. Therefore, in the present invention, it is possible to omit the unnecessary point-scoring operation of the dot wheel even for unselected measurement points, as in the conventional dot recorder shown in FIG. Therefore, when the dot recorder of FIG. 7 is configured for 12 measurement points, the dot recorder is configured for 12 measurement points, even if the number of selected measurement points is 6, regardless of the number. If the player does not perform 12 RBI movements,
Although it is not possible to proceed to the next measurement cycle, in the dot recorder of the present invention, if the number of selected measurement points is 6, for example, the dot operation is performed 6 times and then the next measurement is performed. You can proceed with the cycle. Therefore, the recorder according to the present invention can shorten the measurement period to the time corresponding to the number of selected measurement points, regardless of the configuration of the dot wheel (that is, the number of dot markings). Therefore, it is fully applicable to recording phenomena that occur at high speeds.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of the basic electrical and mechanical elements of a six-point recorder according to an embodiment of the present invention, and FIG. 2 shows various times when recording measured values at two successive measurement points. Fig. 3 is a principle diagram of the rotor and stator of the angular position setting motor of the dot wheel, Fig. 4 is a diagram showing the same motor at six different angular positions, Fig. 5 is the dot type 6
A block diagram of the control logic circuit and drive circuit of the dot wheel angular position setting motor of the dot recorder. FIG. 6 is a detailed diagram of the drive circuit of the dot wheel angular position setting motor.
Fig. 7 is a schematic diagram of the transmission mechanism of a conventionally known multi-point recorder, Fig. 8 is a schematic sectional view of the dotting mechanism of the multi-point recorder, and Fig. 9 is a plan view of Fig. 8 with the dotting wheel removed. 10 are partially sectional front views with the dot wheel removed, similar to FIG. 9. FIG. 11 is a schematic diagram of a transmission mechanism of another conventionally known multi-point recorder, and FIG. 12 is a schematic diagram showing a part of the transmission mechanism. 1...Measuring converter, 2...Measuring point switching relay, 3...
Servo amplifier, 4... Selector switch, 5... Servo motor, 6... Angular position-voltage converter, 7... Dot wheel angle position setting motor, 8... Dot electromagnet, 9... Dot wheel,
10... Recording paper, 11... Recording paper feed motor, 12...
Clock generator, 13... Step motor control circuit, 14... Control circuit, 15... Control circuit, 16... Measurement point selector, 20... Pulse distributor, 21... Logic circuit, 22... Multiplexer, 23... Measurement point selector, 24...Code generator, 25...Code selector,
26...Decoder, 27...6-point relay drive circuit, 2
8...Data selector, 29...Triple push-pull drive circuit, 31...Stator, 32...Field pole, 33...Auxiliary pole, 34...Winding, 35...Rotor, 36...Pole cap, 51...Endless belt, 52, 53 …conversion roller.

Claims (1)

[Claims] 1. Measurement point switching means 2 for switching a measurement signal input terminal to various measurement points, a servo amplifier 3 to which individual measurement signals are supplied via this measurement point switching means, and this servo amplifier. a self-balancing mechanism consisting of a servo motor 5 driven by a servo motor 5 and an angular position-to-voltage converter 6 that converts the respective angular position of this servo motor into a voltage signal and supplies it to the servo amplifier; a dot point mechanism consisting of a dot wheel angular position setting motor 7 and a dot electromagnet 8, to which the rotational motion of the servo motor is transmitted via a rotary motion transmission means 51 and moved to a position according to a measurement signal; control circuits 14 and 15 for controlling the point switching means and the dot wheel angle position setting motor; and a rotor 35 consisting of a permanent magnet magnetized in the direction, and the windings 34 of the field poles are connected in a polygonal manner, and the dotting wheel is moved directly to each new set position starting from the respective angular position. A dot type multi-point recorder, characterized in that the measurement point switching means and the dot point vehicle angle position setting motor are controlled by a common code by the control circuit. 2. The dot type multi-point recorder according to claim 1, characterized in that the rotor has pole caps, each of which faces one field pole and an auxiliary pole adjacent thereto. Type multi-point recorder. 3. In the dotting type multi-point recorder according to claim 1 or 2, when used for 2n measurement points, the angular position setting motor of the dotting wheel has n field poles and n field poles. The windings of the field poles are connected in an n-gon shape, and the cord has n-bit auxiliary poles.
A dot type multi-point recorder characterized in that the code is a code, each bit of which corresponds to a corner of an n-gon-connected winding, and n is an odd number. 4. In the dot type multi-point recorder according to claim 3, when used for six measurement points, the angular position setting motor of the dot wheel has three field poles and three auxiliary poles. , the windings of the field poles are connected in a triangle, the code is a 3-bit code,
A dotting type multi-point recorder characterized in that each point corresponds to a corner of a triangularly connected winding. 5. In the dotting type multi-point recorder according to claim 3 or 4, the code is one step
A dot type multi-point recorder characterized by being a cord. 6. In the dot type multi-point recorder according to any one of claims 1 to 5, the corner of the winding of the field pole can be connected to an operating voltage via a push-pull drive circuit, and The drive circuit selects, through a data selector controlled by a two-phase clock, a code rotated by one bit with respect to the code word corresponding to the selected measurement point when the first phase clock of the two-phase clock arrives. A dot type multi-point recorder characterized in that it is controlled by a code word corresponding to a selected measurement point when a second phase clock arrives. 7. In the dot type multi-point recorder according to any one of claims 1 to 6, the code word of the stepable code generator applied to the address input terminal of the multiplexer is applied to the address input terminal of the multiplexer through a logic circuit. A dot type multi-point recorder, characterized in that a signal for advancing or blocking the code generator is derived from an output signal of a measuring point selector applied to a data input terminal of a multiplexer. 8. The dot type multi-point recorder according to claim 7, wherein the code generator is configured as a type of ring counter. 9. In the dotting type multi-point recorder according to claim 7 or 8, while cyclically scanning measurement point addresses that have not been selected in advance, the decoder and the two-phase clock control circuit are activated from the logic circuit. A dot-type multi-point recorder, characterized in that the prohibition signal issued to the dot-point type multi-point recorder electrically disconnects the measuring point switching means and the dot wheel's angular position setting motor from the code generator.