Frequency division type low-frequency electronic transmitter

Abstract

The utility model relates to a frequency division type low-frequency electronic transmitter, which comprises a solid lithium battery pack, one end of the solid lithium battery pack is electrically connected with a battery on-off plug, one end of the battery on-off plug is electrically connected with an anti-reverse rectifier diode, and the other end of the anti-reverse rectifier diode is electrically connected with an oscillation chip, a frequency division chip and a three-terminal voltage stabilizer respectively. The crystal oscillation frequency division mode is adopted, and the receiver has the advantages of being accurate in transmitting frequency and free of deviation, can stably work at the set frequency, effectively avoids the situation that a receiver cannot capture electromagnetic signals, and improves the receiving efficiency. On the premise that a transmitter generates stable and accurate low-frequency signals, the low-frequency receiver can set the bandwidth to be extremely narrow, noise signals can be greatly attenuated, the anti-interference performance of the receiver is effectively improved, meanwhile, the amplification factor can be increased, the detection distance of the receiver can be increased, and positioning and tracking are more accurate.

Description

Technical Field

[0001] The utility model relates to a frequency-divided low-frequency electronic transmitter, in particular to a frequency-divided low-frequency electronic transmitter applied in a field. Background Art

[0002] At present, most of the transmitters supporting pipe cleaners on the market are LC oscillators. The LC oscillation circuit is mainly used to generate high-frequency sinusoidal signals, generally above 1MHz. It is different from the RC oscillation circuit in that it is composed of inductance and capacitance, so it is named LC oscillator. According to its feedback network, the LC oscillator can be divided into three types: mutual inductance coupling oscillator, inductance feedback oscillator and capacitance feedback oscillator.

[0003] LC oscillators can operate at higher frequencies, but they are not very stable and are not suitable for low-frequency oscillations. At the same time, the frequency of LC oscillator transmitters is prone to frequency deviation, which can easily cause high-precision narrow-bandwidth receivers to be unable to receive transmitter signals. Utility Model Content

[0004] In view of the above-mentioned prior art, the technical problem to be solved by the utility model is that the existing pipe cleaning device-equipped transmitters are mostly LC oscillators, but the LC oscillator is not very stable during use and is not suitable for low-frequency oscillation. In addition, the frequency of the LC oscillator is prone to deviation, which can easily cause a high-precision narrow-bandwidth receiver to be unable to receive the transmitter signal.

[0005] In order to solve the above problems, the utility model provides a frequency-divided low-frequency electronic transmitter, including a solid lithium battery pack, one end of the solid lithium battery pack is electrically connected to a battery on-off plug, one end of the battery on-off plug is electrically connected to an anti-reverse rectifier diode, the other end of the anti-reverse rectifier diode is respectively electrically connected to an oscillation chip, a frequency-dividing chip and a three-terminal voltage regulator, the oscillation chip is electrically connected to the frequency-dividing chip, the other end of the three-terminal voltage regulator is electrically connected to a single-channel inverter, the other end of the battery on-off plug is electrically connected to an electromagnetic oscillation coil, and the other end of the single-channel inverter and the frequency-dividing chip is electrically connected to the electromagnetic oscillation coil.

[0006] In the above-mentioned frequency-divided low-frequency electronic transmitter, a crystal oscillator frequency-divided type is adopted, which has the characteristics of precise and non-drifted transmission frequency, can work stably at the set frequency, and effectively avoid the situation where the receiver cannot capture the electromagnetic signal. Under the premise that the transmitter generates a stable and accurate low-frequency signal, the low-frequency receiver can set the bandwidth to be extremely narrow and attenuate the noise signal to a large extent, effectively improving the anti-interference performance of the receiver, and at the same time can increase the amplification factor, increase the detection distance of the receiver, and make positioning and tracking more accurate.

[0007] As a further improvement of the present application, C1 and C2 connected in parallel to each other are electrically connected between the anti-reverse rectifier diode and the oscillation chip.

[0008] As a further improvement of the present application, an oscillation circuit is provided in the oscillation chip, and the oscillation circuit includes R2, C3, C4 and a crystal oscillator. R2, C3, C4 are electrically connected to pins 10 and 11 of the oscillation chip respectively, and pin 9 of the oscillation chip is electrically connected to C5.

[0009] As a further improvement of the present application, one pin of the oscillation chip is electrically connected to the eleventh pin of the frequency division chip, and the ninth pin of the frequency division chip is electrically connected to C6.

[0010] As another improvement of the present application, the electromagnetic oscillation coil includes L1 and L2, the five pins of the frequency division chip are electrically connected to L1 through the rectifier diodes D2, R1, R3, and the switching transistor T1, and the five pins of the single-channel inverter are electrically connected to L2 through the rectifier diodes D3, R2, R4, and the switching transistor T2.

[0011] To sum up, in actual application, the solid-state lithium battery pack installed inside the transmitter provides a 14.4V DC voltage for the transmitter. After the DC voltage passes through the battery on-off plug, it passes through the anti-reverse connection rectifier diode and is filtered by CI and C2 to provide power for the oscillation chip and the frequency division chip. At the same time, it is adjusted to a DC 5V voltage through a three-terminal voltage regulator to provide power for the single-channel inverter. The other power supply of the solid-state lithium battery pack provides power for the electromagnetic oscillation coil, which effectively solves the problem of easy deviation of the transmitter transmission frequency, makes the transmitter transmission frequency accurate and stable, improves the transmitter performance, and can also improve the detection distance and detection accuracy of the receiver at the same time, effectively reducing the difficulty of positioning and tracking work, improving work efficiency, and thus reducing the cost of pipeline cleaning construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The circuit diagram of this application;

[0013] Figure 2 This is the schematic diagram of the oscillation chip circuit of this application;

[0014] Figure 3 This is the circuit schematic diagram of the frequency division chip of this application;

[0015] Figure 4 This is the schematic diagram of the electromagnetic oscillation coil circuit of this application.

[0016] Description of the numbers in the figure:

[0017] 1 solid lithium battery pack, 2 battery on / off plug, 3 anti-reverse rectifier diode, 4 oscillation chip, 5 frequency division chip, 6 three-terminal voltage regulator, 7 single-channel inverter, 8 electromagnetic oscillation coil. DETAILED DESCRIPTION

[0018] The implementation methods of the present application are described in detail below with reference to the accompanying drawings.

[0019] Figure 1 It shows: a frequency-dividing low-frequency electronic transmitter, including a solid lithium battery pack 1, one end of the solid lithium battery pack 1 is electrically connected to a battery on-off plug 2, one end of the battery on-off plug 2 is electrically connected to an anti-reverse rectifier diode 3, the other end of the anti-reverse rectifier diode 3 is electrically connected to an oscillation chip 4, a frequency-dividing chip 5 and a three-terminal voltage regulator 6, the oscillation chip 4 is electrically connected to the frequency-dividing chip 5, the other end of the three-terminal voltage regulator 6 is electrically connected to a single-way inverter 7, the other end of the battery on-off plug 2 is electrically connected to an electromagnetic oscillation coil 8, and the other end of the single-way inverter 7 and the frequency-dividing chip 5 is electrically connected to the electromagnetic oscillation coil 8.

[0020] Figure 2 It is shown that: C1 and C2 connected in parallel are electrically connected between the anti-reverse rectifier diode 3 and the oscillation chip 4. An oscillation circuit is provided in the oscillation chip 4. The oscillation circuit includes R2, C3, C4 and a crystal oscillator. R2, C3 and C4 are electrically connected to the tenth and eleventh pins of the oscillation chip 4 respectively. The oscillation circuit generates an oscillating square wave of 3 MHz. C3 adopts an adjustable capacitor. The frequency can be fine-tuned by adjusting the capacitor to make the oscillation frequency more accurate and stable. The nine-pin of the oscillation chip 4 is electrically connected to C5. C5 has the function of improving the ripple of the oscillation frequency starting point and making the oscillation circuit easier to start.

[0021] Figure 3 and Figure 4It is shown that: one pin of the oscillation chip 4 is electrically connected to the eleventh pin of the frequency division chip 5, and the 3M oscillation signal generated by the oscillation circuit generates a low-frequency signal of 732.421875 Hz after the twelve-level frequency division of the oscillation chip 4. The low-frequency signal of 732.421875 Hz is led out from one pin of the oscillation chip 4 and introduced into the eleventh pin input end of the frequency division chip 5. After the secondary five-level frequency division of the frequency division chip 5, a low-frequency signal of 22.88818 Hz is generated. The nine pins of chip 5 are electrically connected to C6, which is used to improve the jitter problem of the starting point. The electromagnetic oscillation coil 8 includes L1 and L2. The five pins of the frequency division chip 5 are electrically connected to L1 through the rectifier diode D2, R1, R3, and the switch transistor T1. The 28.88818 Hz low-frequency signal after frequency division is rectified by the rectifier diode D2, limited by R1, and divided by R3, and then given to the base of the switch transistor T1. The switch transistor T1 is driven and connected to The low-frequency oscillation coil L1 at the collector of pin 1 oscillates with the frequency, exciting the soft magnetic core in the coil of L1 to emit an electromagnetic signal. The five pins of the single-channel inverter 7 are electrically connected to L2 through the rectifier diodes D3, R2, R4, and the switching transistor T2. The other path enters the two-pin input end of the single-channel inverter 7, is inverted by the single-channel inverter 7, and is reversely output by the five pins of the single-channel inverter 7. After rectification by the rectifier diode D3, current limiting by R2, and voltage division by R4, it is given to the base of the switching transistor T2. The switching transistor T2 drives the low-frequency oscillation coil L2 connected to the collector of pin 1 to oscillate in the opposite direction with the frequency, exciting the soft magnetic core in the coil of L2 to emit an electromagnetic signal. The two coils oscillate positively and negatively, thereby effectively increasing the amplitude of the electromagnetic signal and the transmission distance of the low-frequency electromagnetic signal, so that the receiver antenna can capture the transmitter signal at a longer distance, providing the detection distance and detection accuracy of the tracker, thereby reducing battery consumption and improving energy efficiency.

[0022] When in use, a solid-state lithium battery pack 1 installed inside the transmitter provides a 14.4V DC voltage for the transmitter. After the DC voltage passes through the battery on-off plug 2, it passes through the anti-reverse connection rectifier diode 3, and is filtered by CI and C2 to provide power for the oscillation chip 4 and the frequency division chip 5. At the same time, it is regulated to a DC 5V voltage by a three-terminal voltage regulator 6 to provide power for the single-channel inverter 7. Another power supply of the solid-state lithium battery pack 1 provides power for the electromagnetic oscillation coil 8, which effectively solves the problem of easy deviation of the transmitter transmission frequency, makes the transmitter transmission frequency accurate and stable, improves the transmitter performance, and can simultaneously improve the detection distance and detection accuracy of the receiver, effectively reduce the difficulty of positioning and tracking work, improve work efficiency, and thus reduce the cost of pipeline cleaning construction.

[0023] In view of current practical needs, the protection scope of the above-mentioned implementation mode adopted in this application is not limited to this. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the protection scope of this utility model.

Claims

1. A frequency-divided low-frequency electronic transmitter, comprising a solid lithium battery pack (1), characterized in that: One end of the solid lithium battery pack (1) is electrically connected to a battery on-off plug (2), one end of the battery on-off plug (2) is electrically connected to an anti-reverse rectifier diode (3), the other end of the anti-reverse rectifier diode (3) is electrically connected to an oscillation chip (4), a frequency division chip (5) and a three-terminal voltage regulator (6), the oscillation chip (4) is electrically connected to the frequency division chip (5), the other end of the three-terminal voltage regulator (6) is electrically connected to a single-channel inverter (7), the other end of the battery on-off plug (2) is electrically connected to an electromagnetic oscillation coil (8), and the other end of the single-channel inverter (7) and the frequency division chip (5) is electrically connected to the electromagnetic oscillation coil (8).

2. The frequency-divided low-frequency electronic transmitter according to claim 1, characterized in that: C1 and C2 which are connected in parallel to each other are also electrically connected between the anti-reverse rectifying diode (3) and the oscillating chip (4).

3. The frequency-divided low-frequency electronic transmitter according to claim 1, characterized in that: The oscillation chip (4) is provided with an oscillation circuit, the oscillation circuit comprising R2, C3, C4 and a crystal oscillator, the R2, C3, C4 being electrically connected to the tenth and eleventh pins of the oscillation chip (4) respectively, and the ninth pin of the oscillation chip (4) being electrically connected to C5.

4. The frequency-divided low-frequency electronic transmitter according to claim 1, characterized in that: One pin of the oscillation chip (4) is electrically connected to the eleventh pin of the frequency division chip (5), and the ninth pin of the frequency division chip (5) is electrically connected to C6.

5. The frequency-divided low-frequency electronic transmitter according to claim 4, characterized in that: The electromagnetic oscillation coil (8) comprises L1 and L2, the five pins of the frequency division chip (5) are electrically connected to L1 via rectifier diodes D2, R1, R3, and a switch transistor T1, and the five pins of the single-channel inverter (7) are electrically connected to L2 via rectifier diodes D3, R2, R4, and a switch transistor T2.

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