Hand pulse generator

Abstract

The utility model discloses a hand-cranking pulse generator, which comprises a shell and further comprises an instrument external component, a power switch, a speed multiplication switch and a shaft selection switch, and the instrument external component is arranged on the surface of the shell and comprises a power switch, a speed multiplication switch and a shaft selection switch. The instrument internal assembly is arranged in the shell and comprises a circuit board, and a single chip microcomputer is fixedly connected to the circuit board. According to the hand-operated pulse generator, the duty ratio of the pulse signal is adjusted through the timer function on the single-chip microcomputer, so that the duty ratio of the pulse signal is ensured to be consistent with the phase difference, problems and faults occurring in different applications are reduced, the accuracy and consistency of output signals are improved, and the universality and the stability are better in the using process.

Description

TECHNICAL FIELD

[0001] The utility model relates to industrial control technology field, concretely is a hand -operated pulse generator. BACKGROUND

[0002] The pulse generator is used to generate signal, produce the electric test signal instrument of required parameter.

[0003] In the existing instrument, because the instrument cooperates through the photoelectric pair tube, code disc and fixed grating, the mechanical structure cooperation precision of three is poor, causes the duty cycle and phase difference of output pulse signal to be inconsistent, easily leads to the problem failure in different application uses.

[0004] In addition, the existing hand -operated pulse generator generally has spring wire, and the use is restricted by the length of wire harness, and the use space and range are limited.

[0005] Therefore, the utility model provides a hand -operated pulse generator to solve above -mentioned problem. UTILITY MODEL CONTENTS

[0006] In view of the deficiency of prior art, the utility model provides a hand -operated pulse generator, and solves above -mentioned problem.

[0007] To realize above -mentioned purpose, the utility model is realized through following technical scheme: a hand -operated pulse generator, including shell, still including:

[0008] Instrument external component, the instrument external component is arranged on the surface of shell,

[0009] Instrument internal component, the instrument internal component is arranged in the shell inside.

[0010] The instrument external component includes power switch, and the power switch is arranged on the lateral edge of shell.

[0011] The instrument external component still includes speed switch and shaft selection switch, and the speed switch and shaft selection switch are arranged on the surface of shell, two scales are arranged on the shell, and the scale is arranged on the upside of speed switch and shaft selection switch respectively.

[0012] The encoder is arranged on the shell, four magnets are arranged on the side of shell away from the encoder, and the emergency stop button is arranged on the shell.

[0013] The instrument internal component includes circuit board, and the circuit board is arranged on the inner side of shell, the hardware filter circuit is arranged on the circuit board, and the photoelectric conversion device is arranged in the inside of encoder.

[0014] The single-chip microcomputer is fixedly connected on the circuit board, the differential output circuit is arranged on the single-chip microcomputer, and the wireless transmission chip is arranged on the single-chip microcomputer.

[0015] Advantages

[0016] The utility model provides a hand -operated pulse generator. Compared with prior art has the following advantages:

[0017] (1) a hand -operated pulse generator, through the timer function on singlechip, realize the adjustment of pulse signal duty cycle, to ensure that the pulse signal duty cycle and phase difference are consistent, thereby reducing the problem failure in different application uses, improve the precision and consistency of output signal, the versatility and stability are better in the use process.

[0018] (2) a hand -operated pulse generator, through the wireless transmission chip on singlechip, realize the length of the wire harness bondage, and the use range is wider.

[0019] (3) a hand -operated pulse generator, through the hardware filter circuit of setting up on circuit board and the differential output circuit on singlechip cooperation, make the signal anti -interference ability, amplify weak signal. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 It is the front side view of the external structure of the utility model;

[0021] Fig. 2 It is the rear side view of the external structure of the utility model;

[0022] Fig. 3 It is the internal structure diagram of the utility model.

[0023] 1, shell in the drawing;

[0024] Instrument external components: 21, power switch;22, emergency stop button;23, speed switch;24, shaft selection switch;25, encoder;26, magnet;

[0025] Instrument internal components: 31, circuit board;32, singlechip. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model and not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the utility model.

[0027] Embodiment one:

[0028] Please refer to Figs. 1-3 A hand -operated pulse generator, including shell 1, still includes:

[0029] Instrument external components, instrument external components are arranged on the surface of the shell 1,

[0030] Instrument internal components, instrument internal components are arranged inside the shell 1.

[0031] Instrument external components include power switch 21, power switch 21 is arranged on the side of the shell 1.

[0032] Instrument external components also include speed switch 23 and shaft selection switch 24, speed switch 23 and shaft selection switch 24 are arranged on the surface of the shell 1, two scales are arranged on the shell 1, the scales are arranged on the upper side of the speed switch 23 and the shaft selection switch 24 respectively.

[0033] The shell 1 is provided with an encoder 25, and four magnets 26 are arranged on the side of the shell 1 away from the encoder 25. The shell 1 is provided with an emergency stop button 22.

[0034] Instrument internal components include circuit board 31, circuit board 31 is arranged inside the shell 1, circuit board 31 is provided with hardware filter circuit, inside the encoder 25 is provided with photoelectric conversion device.

[0035] The circuit board 31 is fixedly connected with a single-chip microcomputer 32, the single-chip microcomputer 32 is provided with a differential output circuit, and the single-chip microcomputer 32 is provided with a wireless transmission chip.

[0036] Working principle:

[0037] Turn on the power switch 21, adjust the speed switch 23 and the shaft selection switch 24, use the encoder 25, rotate the hand wheel on the encoder 25, convert the light into an electrical signal by the photoelectric conversion device inside the encoder 25, transmit the electrical signal to the circuit board 31 through the wire, and transmit the electrical signal to the single-chip microcomputer 32 after the hardware filter circuit. The timer function of the single-chip microcomputer 32 is used to process the output pulse signal duty cycle and phase difference, and then the single-chip microcomputer 32 transmits the differential circuit, the differential circuit outputs the differential signal, and then the wireless transmission chip transmits the differential signal to the receiver wirelessly. The receiver transmits the variable value to the PLC to realize the control function of the equipment, which is free from the length of the wire harness, and has a wider range of use.

[0038] Timer function of the single-chip microcomputer 32:

[0039] Through the prior art, the pulse width value of the measured electric signal is obtained by configuring the working mode of the single-chip microcomputer timer as PWM pulse width modulation, setting the count value of the single-chip microcomputer timer, i.e., the period of the PWM pulse width modulation signal, and setting the duty cycle, i.e., the proportion of the high level of the PWM pulse width modulation signal. The calculation formula of the duty cycle is: duty cycle = TH / (TH+TL)*100%, wherein TH is the high level time, TL is the low level time, the counting of the timer is started, when the count value reaches TH, the high level of the PWM pulse width modulation signal is output, when the count value reaches TH+TL, the low level of the PWM pulse width modulation signal is output, i.e., one PWM pulse width modulation signal period is completed. By changing the value of TH, the adjustment of the duty cycle can be realized, so that the output pulse signal duty cycle and phase difference are consistent.

[0040] Meanwhile, the contents not described in detail in the specification all belong to the prior art known by the person skilled in the art.

[0041] It should be noted that, in this paper, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the term "include", "contain" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0042] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A hand-cranked pulse generator comprising a housing (1), characterized in that, Also include: Instrument external components, the instrument external components are arranged on the surface of the shell (1), Instrument internal components, the instrument internal components are arranged inside the shell (1); The shell (1) is provided with an encoder (25), and the side of the shell (1) away from the encoder (25) is provided with four magnets (26), and the shell (1) is provided with an emergency stop button (22); The instrument internal components include a circuit board (31), which is arranged inside the shell (1), and the circuit board (31) is provided with a hardware filter circuit, and the inside of the encoder (25) is provided with an optical-electric conversion device.

2. A hand-cranked pulse generator according to claim 1, characterized in that: The instrument external components include a power switch (21), which is arranged on the side of the shell (1).

3. A hand-cranked pulse generator according to claim 1, wherein: The instrument external components also include a speed switch (23) and a shaft selection switch (24), which are arranged on the surface of the shell (1), and the shell (1) is provided with two scales, which are arranged on the upper side of the speed switch (23) and the shaft selection switch (24) respectively.

4. A hand-cranked pulse generator according to claim 1, wherein: The circuit board (31) is fixedly connected with a single-chip microcomputer (32), the single-chip microcomputer (32) is provided with a differential output circuit, and the single-chip microcomputer (32) is provided with a wireless transmission chip.

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