RU2133986C1 - Device for indication of value of shaft position angle - Google Patents

Abstract

FIELD: measuring systems. SUBSTANCE: device has segmental indicator. Leads of indicator segments are connected to coding disc information outputs. In this case, segments of the most-significant (least-significant) digit are positioned above (below), to the right (to the left) of segments of the least-significant (most-significant) digit of number. EFFECT: simplified construction. 14 dwg

Description

 The present invention relates to computer technology and a display system of information.

 A device for indicating the value of the angle of the shaft position can find application in all devices and devices where information is needed on the value of the angle of the shaft position (and other electrical and non-electric quantities) with minimal overall dimensions and manufacturing costs.

 It is known that at present, the circuit shown in FIG. 1a. In this design, the shaft drive is encoded with binary reflex (e.g., Gray code) or regular binary codes. The input signal of the coding disk is the value of the angle of the shaft position. With the output (sipes) of the coding disk, a code signal, for example, the Gray code, is received at the information inputs of the code converter (Integrated Circuit Chips Reference, edited by B. V. Tarabrin. M., "Energy", 1980, p. 685, Fig. 5-160, left table). The code converter is introduced into the device circuit to indicate the value of the angle of the shaft position in order to convert the Gray code (or another code) into a seven-position binary decimal code (ibid., P. 681), which is displayed on a seven-segment indicator (N. I. Bukolov, A N. Mikhailov. “Sign-Synthesizing Indicators”, Handbook edited by B. P. Balashov. M., “Radio and Communication”, 1987, p. 91, 5 line above) allows you to read the value of the angle of the shaft position in decimal, familiar to us number system (Fig. 1a-indicator). You can’t do without a code converter, because neither the Gray code nor any other four-digit code used to convert the value of the angle of the shaft position can be represented in decimal display on any indicator, convenient for reading information. At the same time, the Gray code is most suitable for measuring the value of the angle of the shaft position, since the code combinations in it are so distributed among the quantization levels that when switching from any level to a neighboring one, a change in the code combination ("0" - "1" or "1" - "0") occurs in only one discharge. This feature of it among other four-digit codes allows you to convert code information into numeric with the least interference.

 However, the complexity of the scheme of the converter of the Gray code into numerical information and the considerable high cost limit their use in many cases.

The aim of the invention are
- reducing the overall dimensions of the device for indication,
- reduction of manufacturing costs,
- increase in reliability,
- increased noise immunity,
- the convenience of the operator tracking the value of the angle of the shaft position by the indicator,
- increase the speed of reading information by the operator.

This goal is achieved by the fact that instead of the well-known binary reflex or conventional binary codes used to convert the value of the angle of the shaft position to a number, the same binary four-digit code is used in this device for encoding a disk and indicator, 12 code combinations of which form three groups of numbers of the four code combinations in the group (Fig. 2). In each of these groups, code combinations are so distributed among the quantization levels that, when switching from any level to a neighboring one, a change in the code combination ("0" - "1" or "1" - "0") occurs in two digits. Thus, within each group of numbers, this code is continuous or circular. This property of the code is used to indicate the value of the angle of the shaft position on the four-segment indicator. The indicator segments (a, b, c, d), controlled by code combinations (the logical segment “1” corresponds to the glow of the indicator segment), sequentially light up clockwise (Fig. 2):
- one at a time (1-2-3-4) - for the first group of numbers (1, 2, 3, 4);
- two in each (4, 1-1, 2-2, 3-3, 4) - for the second group of numbers (5, 6, 7, 8);
three each (3, 4, 1-4,1,2-1,2,3-2,3,4) - for the third group of numbers (9, 10, 11, 12).

 In this case, 12 levels of the measured angle of the shaft position occupies one familiarity on the indicator. If it is required to measure the angle of the shaft position with greater accuracy, then an indicator with two or more digits of numbers should be used, and the measured angle of the shaft position may already contain up to 144 (12x12) and more quantum levels on the coding disk. The number of possible quantization levels on the coding disk for an indicator of two digits (the least significant and highest digit) is shown in FIG. 3.

Since the production of the coding disk is carried out under the technical conditions of a particular device or device, the quantization step of the coding disk can be selected in accordance with the number of quantization levels (Fig. 3) so that it is convenient for them to operate when taking readings from the indicator. An example of reading the values of the angle of the shaft position on the two-digit indicator shown in FIG. 4 (the quantization step and the number of quantization levels are constant for a particular device and easy to remember), the following: if the quantization step of the least significant bit is selected, for example, 1 ^o 15 ', the number of quantization levels is 8, then the quantization step of the second (senior) digit will be equal to 1 ^o 15 '• 8 = 10 ^o . On the indicator (Fig. 4), the number 1 is fixed in the low order, 7 in the high order (see Fig. 2), i.e. the angle of the shaft position will be equal to 7 • 10 ^o + 1 • 1 ^o 15 '= 71 ^o 15'. If the quantization step of the least significant bit is selected, for example, 1 ^o , the number of quantization levels is 10, then the quantization step of the second (senior) digit number will be 1 ^o • 10 = 10 ^o . on the indicator (Fig. 4) in this case, the value of the angle of the shaft position will be fixed 7 • 10 ^o + 1 • 1 ^o = 71 ^o .

 The layout of the lamellas on the coding disk with a 12-way way of representing the value of the angle of the shaft position on the indicator and the control discharge "a" is shown in FIG. 5. The lamellas of conductors and insulators indicated in FIG. 5 correspond to the contact pickup of the signal (in the case of inductive signal pick-up instead of conductors and insulators, the lamellas are made of magnetic and non-magnetic material, respectively, when photoelectric signal pick-up instead of the current-conducting lamella, the lamella is made of transparent material, and instead of the insulator, the lamella is of opaque material).

When the shaft is rotated clockwise within the first sector of the coding disk on the indicator (Fig. 2), a "rotation" is performed, and the same clockwise, 360 ^{o of} one segment, within the second sector - two segments, within the third sector - three segments. When moving from the first sector to the second and from the second to the third, the number of protected segments of the indicator changes from one to two and from two to three, respectively, that is, the larger the angle of the shaft position, the greater the “rotation” of the segment (s) by indicator, the greater the number of segments involved in the display of the angle.

 Thus, each symbol that displays the value of the angle of the shaft position on the indicator is characterized by two parameters: the position of the segment (s) on the four-segment indicator and the number of segments. This makes it possible to quickly get used to remembering unusual symbols of numbers.

Changing the angle of the shaft, equal to the quantization step of the coding disk, gives a change in the angle of "rotation of the indicator segments by 90 ^o ". For the operator, this change is more than noticeable and quite obvious (the coding disk rotates and the indicator segments “rotate” in the same direction), the lamellas of two digits change simultaneously.

 If the number of quantization levels is 10, then the value of the angle of the shaft position is expressed in the usual decimal number system and the choice of ten code combinations from the available 12 for the coding disk and indicator, the most convenient when using them, are presented in FIG. 6. The hatched lamellas (logical "1") of the coding disk are made of conductive material (during contact signal pickup), and the unshaded lamellas (logical "0") are made of insulator. The symbols corresponding to the binary decimal four-position code are displayed on the indicator (logical "1" - the segment is on, logical "0" - the segment is canceled).

 Despite the fact that such a method of indicating the value of the angle of the shaft position requires only a coding disk and an indicator, however, this device may also contain false information displays arising from a break in the communication line between the coding disk and the indicator, a malfunction of the coding disk and the indicator. To help the operator to assess the reliability of the information, you can enter an additional check digit (Fig. 2 and Fig. 6), the logical unit ("1") of which can be indicated, for example, in the form of a point. When a check digit is introduced in all code combinations, the number of logical "1" is either even (in Fig. 2 and Fig. 6 for check bit "a") or odd (for check bit "b"), which allows the operator to judge the reliability information.

 The simplified circuit of the device thus obtained for indicating the value of the angle of the shaft position (Fig. 1b), in which there is no converter of the Gray code (or other code) to the seven-position code. It is simple bypassed by new connections that were formed between the coding disk and the indicator and which became possible due to the use of a new binary decimal four-position code (Fig. 7), which encodes the shaft disk. The peculiarity of this code is that the code combinations in it are so distributed among the quantization levels, taking into account the check digit (K.R.), that when switching from any level to the next change in the code combination ("0" - "1") or " 1 "-" 0 ") occurs in two digits. The same code was also used for the four-segment indicator, the information output of which is a numerical decimal display represented by symbols (Fig. 6, column "Indicator").

 In order to expand the possibilities of using the device to indicate the value of the angle of the shaft position and use it to indicate other values, when instead of the input value in the form of the value of the angle of the shaft position, there could be any other value (electric or non-electric), if only this value was converted to binary - a decimal four-position code and instead of the coding disk (shaft-to-code converter) used only in the device to indicate the value of the angle of the shaft position, which should be distinguished from the indication any other quantities by the fact that turning the shaft clockwise causes a similar “rotation” of the indicator segments and the same clockwise, an encoder or code converter of any electrical or non-electrical quantities to a binary decimal four-position code is connected to the indicator.

 An analog of such a device for indication can be selected "Device for visualization of encoded information using a plasma indicator" containing a coding unit, the information outputs of which are connected to the terminals of the indicator segments, while the indicator segments are made in the form of two elements. The design of such a panel contains elements E1, E2, connected in pairs P1-P7 (French patent N 2 651, 355, CL G 09 F 9/313, publ. 1991, 21 s). The conclusions of the elements E1 of the seven-segment indicator of such a panel are connected to the outputs of the coding unit, and the conclusions of the elements E2 of the same segments are connected together and connected to a voltage generator. Here the numerical information is displayed on the indicator in one decimal place (elements of E1 segments). Elements E2 segments carry supporting information (Fig. 8). To display a two-digit number on the panel, you will need exactly the same device, the indicator of which will be located either to the right (for the least significant digit) or to the left (for the highest digit) of this digit, i.e. the information on the indicator will be presented in the form of a series of numbers located line by line from left to right from senior to junior level.

 For a more compact way of displaying multi-valued encoded information (Fig. 9), we can offer, as a basis, a four-segment device for indicating the value of the angle of the shaft position, in which the conclusions of the segments A, B, C, D of the indicator are connected to the information outputs of the coding disk (or other encoder, the information output of which is a binary decimal four-position code), and segments a, b, c, d, for example, of the highest order of numbers can be located either higher, right, lower, left, or lower , Left, above right of the segments A, B, C, D, depending on the convenience of the operator pickup display selection information. The same rule exists for the lowest digit category, i.e., segments a, b, c, d of the lowest digit category with respect to segments A, B, C, D can be located in the same way, either above, to the right, below, to the left, or lower, left, higher, right of segments A, B, C, D. (Fig. 10 shows the decimal digits used when displayed on a four-segment indicator).

 An example of reading information when the highest digit number (a, b, c, d) is “inside” the lower or “outside” of it is shown in FIG. 11a (record of the number 25). If the lowest category of numbers is located “inside” the higher or “outside” of it, then, naturally, when reading the higher and lower digits will change places (Fig. 11a is a record of number 52). Therefore, the operator himself, at his discretion, can determine the places of the highest and lowest digits or, what is the same, determines the highest height of the sign of the digit, which he will pay more attention to. In this case, all bits of numerical information during frontal observation will be located around an axis directed from the observer to the center of the symbols displayed on the indicator. The reading of information in this case will be parallel in nature, when all the categories are covered at a glance. In this case, the speed of reading information should be expected higher, since it does not take time to move the gaze from left to right across the digits and the human operator needs only one visual fixation to read the ambiguous information.

 By increasing the polysemy of numbers, it is possible to use a serial-parallel display method when, for example, the two lower digits are located sequentially behind the two higher digits, and each pair of higher and lower digits is recorded in a parallel way (Fig. 11b). If the higher of the two digits of each pair are “inside” the lower digits, then the numerical information can be read as a record of the number shown in Figs 11b - 46 58, if the lower of the two digits of each pair are “inside” the higher digits, then the indicator will the number 64 is written down.

In some cases, the operator needs to observe, for example, two parameters of the controlled object. These parameters can be displayed on the indicator in such a way that one parameter, for example temperature, is indicated with a smaller angular size of the sign, and another parameter, for example, the angle of the shaft position, is displayed with a large angular size of the sign. In FIG. 11c, for example, the temperature value (39 ^o ) and the angle of the shaft position (15 ^o ) are indicated. The same parameters can also be represented in this way: one parameter, for example, temperature, is indicated in a seven-segment way, and the angle of the shaft position is shown in four-segment way (Fig. 11c).

 Thus, the device for indicating the value of the angle of the shaft position allows not only to reduce the number of indicator segments, the number of indicator control communication lines, the size of the indicator sign, get rid of the intermediate code converter, but also use the four-segment indicator to display various ambiguous information in a way that in many cases may be preferable to the usual.

Claims (1)

 A device for indicating the value of the angle of the shaft position, consisting of a segment indicator, the segments of which are controlled by code combinations, characterized in that the code combinations reflect the value of the angle of the shaft position of the coding disk, the distribution of the lamellas-conductors and lamellas-insulators, on which the lamellas are changed in two categories at the same time, when moving from one quantization level to another, the outputs of indicator segments A, B, C, D are connected to the information outputs of the coding disk, segments a, b, c, d of the lowest whether higher rank numbers are arranged respectively above, to the right, lower left, or lower left, above right of the segments A, B, C, D.

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