A waveform signal generator

Abstract

The present invention discloses a waveform signal generator, which belongs to the field of electronic technology, and includes a shell, in which a waveform generating device, a rotating driving device and a signal collecting device are arranged. At least one circular high-frequency triggering ring is arranged on the upper part of the waveform generating device, and the high-frequency triggering ring is composed of evenly distributed triggering blocks, which are permanent magnets or magnetic steels, and the polarities of two adjacent triggering blocks in the same direction are different. The signal collecting device is provided with a Hall sensor for collecting signals of the magnetic field to form a periodic waveform signal. The present invention has the beneficial effects of being easy to adjust the frequency and amplitude of the output signal, being able to generate a negative voltage signal, and being easy to operate, transform, and repair and maintain.

Description

Technical Field

[0001] The invention relates to the field of electronic technology, in particular to a waveform signal generator. Background Art

[0002] In the existing electronic and electrical fields, signals of different frequencies are often used to detect, transmit data, verify equipment, etc. Currently, the commonly used waveform generator often adopts the form of an oscillation circuit, and the frequency of the output signal is changed by setting the resistance value of the resistor and capacitor in the oscillation circuit. However, this signal generating device cannot generate a negative signal, that is, it can generate a waveform that changes between positive and negative amplitudes like an AC generator.

[0003] At the same time, the existing waveform generating modules are all large-scale integrated circuits, so their anti-interference ability is weak, and they are not easy to maintain and repair after damage. Therefore, it is an urgent requirement to design a waveform signal generator that is easy to adjust the frequency and amplitude and can generate negative signals, and has a simple structure, is easy to maintain and operate, and is easy to modify. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a waveform signal generator which is easy to adjust the frequency and amplitude and can output a negative pressure signal.

[0005] The technical solution to the technical problem to be solved by the present invention is: a waveform signal generator, including a shell, characterized in that: the shell is provided with: a waveform generating device, a signal collecting device, and a rotating driving device. At least one circular high-frequency triggering ring is provided on the upper part of the waveform generating device, and the high-frequency triggering ring is composed of evenly distributed triggering blocks; the rotating driving device drives the waveform generating device to rotate at a uniform speed; the length direction of the signal collecting device is perpendicular to the axis of the waveform generating device; the signal collecting device is provided with a collecting sensor. The triggering block is a permanent magnet or a magnetic steel, and the polarities of two adjacent triggering blocks in the same direction are different.

[0006] Preferably, the spacing between the trigger blocks in each circle of the high-frequency trigger circle is the same.

[0007] Preferably, the number of trigger blocks in each circle of the high-frequency trigger circle is the same.

[0008] Preferably, the high-frequency triggering ring is provided with at least three rings, wherein the number of triggering blocks in at least two rings of the high-frequency triggering ring is the same, and the spacing between the triggering blocks in at least two rings of the high-frequency triggering ring is the same.

[0009] Preferably, the signal acquisition device is provided with a collection sensor corresponding to each high-frequency trigger circle, and further comprises a multi-way switch, wherein the output end of each collection sensor is respectively connected to different input ends of the multi-way switch, and the output end of the multi-way switch serves as the output end of the signal acquisition device;

[0010] or,

[0011] The signal acquisition device is provided with a track, a slider is slidably arranged on the track, and the acquisition sensor is fixedly connected to the slider; the shell is provided with a sliding hole at a position corresponding to the track of the signal acquisition device, a shift block is slidably arranged inside the sliding hole, and the shift block is fixedly connected to the slider; scales or frequency marks are provided on both sides of the sliding hole.

[0012] More preferably, the number of the signal acquisition devices is the same as the number of the high-frequency triggering coils; and the signal acquisition devices are evenly distributed on the circumference.

[0013] Preferably, the device further comprises an amplitude regulating device, wherein the amplitude regulating device is a voltage regulating module, and an output end of the voltage regulating module is electrically connected to an input end of the Hall sensor;

[0014] or,

[0015] The amplitude voltage regulating device includes a lifting screw and an adjusting handle. Both ends of the signal acquisition device are slidably connected to the slide grooves arranged on the shell. The middle part of the signal acquisition device is provided with a screw hole threadedly connected to the lifting screw. The upper part of the shell is provided with an adjusting through hole at a position corresponding to the screw hole. The adjusting through hole is rotatably connected to the upper end of the lifting screw through a bearing. The adjusting handle is a hand wheel, and the middle part of the adjusting handle is fixedly connected to the lifting screw.

[0016] Preferably, it also includes a uniform speed detection device, which includes: a start trigger magnet, a contact trigger magnet, a uniform speed detection Hall sensor, and an alarm timer. The start trigger magnet is arranged on the side of the waveform generating device; the contact trigger magnet is arranged on the side of the waveform generating device and has a spacing greater than 45° arc between it and the start trigger magnet; the uniform speed detection Hall sensor is arranged on the inner wall of the shell and overlaps with the waveform generating device in the horizontal direction; the alarm timer, the alarm timer uniform speed detection Hall sensor is electrically connected to detect the time taken for the start trigger magnet and the contact trigger magnet to rotate at an angle, and an alarm signal is issued if the time is greater than or less than a set value.

[0017] Preferably, a counterweight ring is provided on the periphery of the waveform generating device.

[0018] A better way to change the waveform:

[0019] Switch the output signal to the high-frequency trigger ring with the same number of trigger blocks as the current high-frequency trigger ring;

[0020] How to change the frequency:

[0021] Switch the output signal to a high-frequency trigger ring with the same trigger block spacing as the current high-frequency trigger ring;

[0022] How to change the amplitude:

[0023] Change the distance between the acquisition sensor and the trigger block, or change the input voltage of the acquisition sensor.

[0024] The beneficial effects of the present invention are:

[0025] 1. It is convenient to adjust the frequency and amplitude of the output signal;

[0026] 2. Able to generate negative pressure signal;

[0027] 3. Easy to operate, modify, repair and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of an embodiment of the present invention

[0029] Figure 2 Schematic diagram of an embodiment of the present invention

[0030] Figure 3 Schematic diagram of a waveform generating device according to an embodiment of the present invention

[0031] Figure 4 This is a schematic diagram of the frequency scale outside the housing of an embodiment of the present invention.

[0032] Figure 5 This is a schematic diagram of the distribution of a waveform generating device according to an embodiment of the present invention.

[0033] Figure 6 Schematic diagram of a uniform speed detection device according to an embodiment of the present invention

[0034] Figure 7 Schematic diagram of a sampling circuit according to an embodiment of the present invention

[0035] Figure 8 Schematic diagram of an embodiment of the present invention

[0036] In the figure:

[0037] 420, a shifting block; 410, a slider; 400, a housing; 210, a collection sensor; 190, a high-frequency triggering coil; 110, a triggering block; 200, a signal collection device; 300, a rotation driving device; 100, a waveform generating device; DETAILED DESCRIPTION

[0038] In order to make the technical solutions and beneficial effects of the present invention clearer, the embodiments of the present invention are further explained in detail below.

[0039] Embodiment 1

[0040] A waveform signal generator comprises a housing 400 , wherein a waveform generating device 100 , a signal collecting device 200 and a rotating driving device 300 are arranged inside the housing 400 .

[0041] At least one circular high-frequency triggering ring 190 is provided on the upper part of the waveform generating device 100, and the high-frequency triggering ring 190 is composed of evenly distributed triggering blocks 110; the triggering blocks 110 are permanent magnets or magnetic steels, and the polarities of two adjacent triggering blocks 110 in the same direction are different.

[0042] The rotation drive device 300 drives the waveform generating device 100 to rotate at a uniform speed. Preferably, the rotation drive device 300 can be driven by a DC motor, and a voltage stabilizing module can be used to ensure the uniform speed of the motor's rotation. In order to ensure the stability of the rotation, the waveform generating device 100 can be set to a circular plate shape and placed horizontally. The rotation drive device 300 is fixedly connected to the bottom of the housing 400. Since a DC motor is used for driving, the shaft of the motor faces upward and is fixedly connected to the center of the waveform generating device 100. Preferably, in order to ensure the stability of the rotation, the shaft of the motor passes through the waveform generating device 100 and is fixedly connected to the upper part of the housing 400 through a bearing. In this way, the stability of the motor and the waveform generating device 100 can be ensured.

[0043] During the rotation of the waveform generating device 100, a single trigger block 110 will make a circular motion, and the trigger blocks 110 in one circle will pass through a certain specific position in sequence. Therefore, it is necessary to set a signal acquisition device 200 to detect the signal at the position, and then a periodic signal can be generated. The length direction of the signal acquisition device 200 is perpendicular to the axis of the waveform generating device 100; the signal acquisition device 200 is provided with an acquisition sensor 210, wherein the acquisition sensor 210 is a Hall sensor.

[0044] Since the magnetic poles of the two adjacent trigger blocks 110 in the same direction are different, in this embodiment, the upward magnetic poles of the two adjacent trigger blocks 110 are respectively N pole and S pole. Due to the different polarities, the Hall sensor will output different signals, such as outputting a positive signal when the S pole passes through the Hall sensor and outputting a negative signal when the N pole passes through the Hall sensor.

[0045] The signal acquisition device 200 can be fixedly connected to the inner wall of the housing 400 or can be slidably connected. As shown in the figure, in this embodiment, the signal acquisition device can be set as a long rod or a long rod with a ring in the middle. The through hole or the ring in the middle of the long rod is set on the rotating shaft, so as to avoid interference with the rotating shaft. The two ends of the signal acquisition device are connected to the inner wall of the housing 400, and the acquisition sensor 210 can be installed at a specific position of the signal acquisition device 200 as needed, or slidably set on the signal acquisition device 200.

[0046] In some special applications, it is necessary to change the shape of the waveform, the frequency and amplitude of the signal, etc. Therefore, the number of turns of the high-frequency trigger circle 190 is different, and the output of different signals is achieved by collecting the signals of the trigger blocks 110 on different high-frequency trigger circles 190.

[0047] (I) Changes in signal waveform

[0048] The Hall sensor collects the change of magnetic field strength. Since the trigger block 110 itself is a permanent magnet, its magnetic field strength will not change, but the closer it is to the permanent magnet, the greater its magnetic field strength will be. During the movement of the trigger block 110, the distance between it and the Hall sensor is from far to near and then far away. Therefore, when the two are facing each other, the output signal strength is the largest. By setting different spacers, the waveform will change.

[0049] At this time, the number of trigger blocks 110 on the two high-frequency trigger circles 190 is the same. Since the number is the same, but the circumferences of the different circles are different, the spacing between the trigger blocks on the different high-frequency trigger circles 190 is different. At this time, when switching, different waveform signals will be generated. Since the rotation speed of the waveform generating device 100 remains unchanged, the frequency will not change.

[0050] (ii) Changes in signal frequency

[0051] The frequency can be changed by changing the rotation speed of the waveform generating device 100 .

[0052] The number of trigger blocks 110 in two adjacent high-frequency trigger circles 190 is set to be different, and the frequency switching can be achieved by switching the different high-frequency trigger circles 190 collected by the acquisition sensor. The spacing between the trigger blocks in the two adjacent high-frequency trigger circles 190 is the same. Since the circumferences of the two high-frequency trigger circles 190 are different, but the spacing between the trigger blocks is the same, the number of trigger blocks is different, and the number of triggers is different after one rotation, thereby achieving the change of frequency.

[0053] (III) Simultaneous adjustment of waveform and frequency in one device

[0054] At this time, there are at least three high-frequency triggering circles 190, among which the number of trigger blocks 110 in at least two high-frequency triggering circles 190 is the same, and the spacing between the trigger blocks 110 in at least two high-frequency triggering circles 190 is the same. That is, in all high-frequency triggering circles 190, there are both the same spacing and the same number.

[0055] In order to realize signal collection and switching, a switching device needs to be provided or multiple Hall sensors need to be provided at the same time. (one)

[0057] The signal acquisition device 200 is provided with a collection sensor 210 corresponding to each circle of high-frequency triggering circle 190, and the signal acquisition device 200 is provided with a Hall sensor corresponding to each circle of high-frequency triggering circle. At this time, in order to realize the switching of signals, a multi-way switch is set. The output end of each of the collection sensors 210 is respectively connected to different input ends of the multi-way switch, and the output end of the multi-way switch serves as the output end of the signal acquisition device. Therefore, by switching the multi-way switch, different signals can be output at the output end of the multi-way switch.

[0058] Similarly, multiple signal acquisition devices can be provided, each signal acquisition device 200 is provided with at least one Hall sensor, and the sum of the number of acquisition sensors on all signal acquisition devices 200 is the same as the number of turns of the high-frequency triggering circle 190. Preferably, the number of the signal acquisition devices 200 is the same as the number of turns of the high-frequency triggering circle 190; the signal acquisition devices 200 are evenly distributed on the circumference. (two)

[0060] The signal acquisition device 200 is provided with a track, a slider 220 is slidably arranged on the track, and the acquisition sensor 210 is fixedly connected to the slider 220; the housing 400 is provided with a sliding hole 410 at a position corresponding to the track of the signal acquisition device 200, a shift block 420 is slidably arranged inside the sliding hole 410, and the shift block 420 is fixedly connected to the slider 220; scales or frequency markings are arranged on both sides of the sliding hole 410.

[0061] The slider 410 can be moved by turning the dial block 420, and the frequency can be adjusted according to the scale. If the signal acquisition device 200 is a long rod, such as a round rod or a square rod, it can be used as a track by setting a slider on its outside, wherein the slider 220 is provided with a through hole with the same cross-sectional shape as the signal acquisition device 200. At this time, by sliding the slider, the slider can drive the acquisition sensor 210 to move, and different signals can be output when it moves to different circles.

[0062] The signal acquisition device 200 can be set as two parallel long rods, and the parallel opposite surfaces are provided with a slide groove, the slider slides inside the slide groove, the slider 220 is provided with a thread hole, and a lead screw is provided in the space formed by the two long rods and the slide groove. The end of the lead screw is rotatably connected to the position of the signal acquisition device 200 close to the motor shaft, and the other end of the lead screw extends to the outside of the housing. The position of the slider 220 is adjusted by setting a hand wheel. Correspondingly, a through hole is provided at the corresponding position of the housing so that the lead screw can extend to the outside of the housing. At the same time, in order to adjust the amplitude, the through hole is set as a waist-shaped hole with the length direction in the up-down direction.

[0063] In addition to adjusting the frequency, it is also necessary to be able to adjust the amplitude. The following are two amplitude adjustment devices:

[0064] 1. The amplitude adjustment device is a voltage regulating module 500, and the output end of the voltage regulating module 500 is electrically connected to the input end of the Hall sensor. Figure 7 As shown in FIG. 5 , the change of the voltage regulating module 500 can change the voltage output of the output terminal of the Hall sensor. Figure 8 In the process, connect the output of the voltage regulator module to Figure 8 The power connection of the circuit also has the function of voltage regulation. Figure 8 In the process, when the power supply changes, the voltage division of the resistor will change at the same time, thereby achieving amplitude adjustment, that is, gain adjustment during the detection process.

[0065] 2. The amplitude voltage regulating device includes a lifting screw 610 and an adjusting handle 620. Both ends of the signal acquisition device 200 are slidably connected to the slide grooves provided on the housing 400, that is, the signal acquisition device can move up and down. A screw hole is provided in the middle of the signal acquisition device 200 to be threadedly connected to the lifting screw 610, and an adjusting through hole is provided at the position corresponding to the screw hole on the upper part of the housing 400. The adjusting through hole is rotatably connected to the upper end of the lifting screw 610 through a bearing. The adjusting handle 620 is a hand wheel, and the middle part of the adjusting handle 620 is fixedly connected to the lifting screw 610. Turning the hand wheel can realize the lifting and lowering of the signal acquisition device 200, and then realize the change of the strength of the signal received by the equipment acquisition sensor 210.

[0066] Preferably, the rotation driving device 300 is a DC motor for speed regulation. The motor is controlled by setting a DC voltage stabilizing module, wherein the output end of the DC voltage stabilizing module is electrically connected to the motor, and the input end is connected to an external power supply.

[0067] A uniform speed detection device 700 is further provided to ensure uniform rotation, and the DC voltage stabilization module adopts a voltage adjustment module controlled by PWM, wherein the uniform speed detection device 700 includes a start trigger magnet 710, a contact trigger magnet 720, and a uniform speed detection Hall sensor 730. The start trigger magnet 710 is provided on the side of the waveform generating device 100; the contact trigger magnet 720 is provided on the side of the waveform generating device 100 and a spacing greater than 45° arc is provided between the start trigger magnet. The uniform speed detection Hall sensor 730 is provided on the inner wall of the housing 400 and overlaps with the waveform generating device 100 in the horizontal direction. The uniform speed detection Hall sensor 730 of the alarm timer is electrically connected to detect the time taken for the angle rotation of the start trigger magnet 710 and the contact trigger magnet 720, and an alarm signal is issued if the time is greater than or less than the set value. The alarm timer can be set by a single chip microcomputer, and a buzzer is provided at the same time, and the input pins of the single chip microcomputer are respectively connected to the start trigger magnet 710 and the contact trigger magnet 720, and the output pin controls the buzzer.

[0068] In order to maintain the stability of the rotation, a weight ring is provided on the periphery of the waveform generating device 100. By increasing the weight of the waveform generating device 100, its stability is increased.

[0069] According to the above structure, the use method of the present invention includes the following method:

[0070] How to change the waveform:

[0071] The output signal is switched to the high frequency triggering coil 190 with the same number of trigger blocks 110 as the current high frequency triggering coil 190. Method for changing the frequency:

[0072] The output signal is switched to the high-frequency trigger coil 190 having the same spacing as the trigger block 110 of the current high-frequency trigger coil 190 .

[0073] The above two methods adjust the slider by moving the slider block 420 and rotating the lead screw. When the slider moves to different positions, the Hall sensor collects different signals and outputs different signals.

[0074] At the same time, adjusting the input voltage of the DC motor can also achieve the switching of the frequency signal.

[0075] How to change the amplitude:

[0076] The distance between the acquisition sensor 210 and the trigger block 110 is changed, or the input voltage of the acquisition sensor 210 is changed.

[0077] Specifically, the amplitude of the output signal can be adjusted by adjusting the amplitude adjustment device.

[0078] Embodiment 2

[0079] The structure in the first embodiment is applied, and a uniform speed detection device 700 is set to detect the speed. The speed can be converted into the rotation speed, and the rotation speed can be converted into the frequency. Assuming that the frequency of the motor rotation is f0, and the number of trigger blocks on the high-frequency trigger circle 190 is n, the frequency of the output end of the present invention is f=f0×n. If n changes, the output frequency will change. Therefore, a digital display module is set and connected to the single-chip microcomputer system in the alarm timer, so as to realize the display of the frequency signal.

[0080] The present invention is mainly used to generate a waveform signal, and a frequency detection device can also be set to detect the frequency. For example, the frequency can be counted by counting the number of detected wave peaks through a single chip microcomputer.

[0081] Embodiment 3

[0082] In the process of electrical or electronic testing, signals with special waveforms are often required. This embodiment is based on the first embodiment, in which the magnetic field strengths of the trigger blocks are different, but they are regularly arranged into multiple sections on the circumference of a high-frequency trigger ring 190, or irregularly arranged into one section.

[0083] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Through the above description, relevant staff can make various changes and modifications without departing from the technical concept of the present invention. The technical scope of the present invention is not limited to the contents of the specification. All so-called equal changes and modifications of the shapes, structures, features and spirits described in the scope of the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A waveform signal generator, comprising a housing (400), characterized in that: The housing (400) is provided with: A waveform generating device (100) is provided with at least one circular high-frequency triggering circle (190) at the top, wherein the high-frequency triggering circle (190) is composed of evenly distributed triggering blocks (110); A rotation driving device (300) drives the waveform generating device (100) to rotate at a constant speed; The signal acquisition device (200) has a length direction perpendicular to the axis of the waveform generating device (100); the signal acquisition device (200) is provided with an acquisition sensor (210), and the acquisition sensor (210) is a Hall sensor; The trigger block (110) is a permanent magnet or magnetic steel, and the polarities of two adjacent trigger blocks (110) in the same direction are different; The spacing between the trigger blocks (110) in each circle of the high-frequency trigger circle (190) is the same; The number of trigger blocks (110) in each circle of the high-frequency trigger circle (190) is the same; The high-frequency triggering circle (190) is provided with at least three circles, wherein the number of triggering blocks (110) in at least two circles of the high-frequency triggering circle (190) is the same, and the spacing between the triggering blocks (110) in at least two circles of the high-frequency triggering circle (190) is the same; The signal acquisition device (200) is provided with a collection sensor (210) corresponding to each high-frequency trigger circle (190), and further comprises a multi-way switch, wherein the output end of each collection sensor (210) is respectively connected to different input ends of the multi-way switch, and the output end of the multi-way switch serves as the output end of the signal acquisition device; Alternatively, the signal acquisition device (200) is provided with a track, a slider (220) is slidably arranged on the track, and the acquisition sensor (210) is fixedly connected to the slider (220); the housing (400) is provided with a sliding hole (410) at a position corresponding to the track of the signal acquisition device (200), a shifting block (420) is slidably arranged inside the sliding hole (410), and the shifting block (420) and the slider (220) are fixedly connected; scales or frequency markings are provided on both sides of the sliding hole (410); The number of the signal collection devices (200) is the same as the number of high-frequency triggering coils (190); the signal collection devices (200) are evenly distributed on the circumference; It also includes an amplitude regulating device, the amplitude regulating device being a voltage regulating module (500), the output end of the voltage regulating module (500) being electrically connected to the input end of the Hall sensor; Alternatively, the amplitude adjustment device comprises a lifting screw (610) and an adjustment handle (620), the two ends of the signal acquisition device (200) are slidably connected to the slide grooves provided on the housing (400), the middle part of the signal acquisition device (200) is provided with a screw hole threadedly connected to the lifting screw (610), the upper part of the housing (400) is provided with an adjustment through hole at a position corresponding to the screw hole, the adjustment through hole is rotatably connected to the upper end of the lifting screw (610) through a bearing, the adjustment handle (620) is a hand wheel, and the middle part of the adjustment handle (620) is fixedly connected to the lifting screw (610); It also includes a uniform speed detection device (700), which includes: a start trigger magnet (710) disposed on the side of the waveform generating device (100); A contact trigger magnet (720) is disposed on a side of the waveform generating device (100) and is spaced from the start trigger magnet by an arc greater than 45°; A uniform speed detection Hall sensor (730) is disposed on the inner wall of the housing (400) and overlaps with the waveform generating device (100) in the horizontal direction; An alarm timer, the alarm timer being electrically connected to a uniform speed detection Hall sensor (730) and used to detect the time taken for the start trigger magnet (710) and the contact trigger magnet (720) to rotate at an angle, and an alarm signal being issued if the time is greater than or less than a set value; The waveform generating device (100) is provided with a counterweight ring on its outer periphery; A method for changing the waveform: switching the output signal to high-frequency trigger circles (190) having the same number of trigger blocks (110) as the current high-frequency trigger circle (190); Method for changing the frequency: switching the output signal to a high-frequency triggering circle (190) having the same spacing as the triggering block (110) of the current high-frequency triggering circle (190); Method for changing the amplitude: changing the distance between the acquisition sensor (210) and the trigger block (110), or changing the input voltage of the acquisition sensor (210).

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