Pointer type short wave power meter

Abstract

The utility model relates to the field of power meters, and provides a pointer type short-wave power meter, which comprises an input detection circuit, a gear switching circuit, a meter head linear correction circuit, a reference voltage circuit, a power supply circuit and a pointer module, an input radio frequency signal is processed through the input detection circuit, multi-gear processing is carried out on a detected direct current signal through the gear switching circuit, nonlinearity of the detected signal is processed through the gauge head linear correction circuit, the finally output signal directly pushes the pointer module, and the pointer module displays power reading. Therefore, accurate power measurement in an electromagnetic interference environment is realized.

Description

Technical Field

[0001] The utility model relates to the field of power meters, in particular to a pointer type short-wave power meter. Background Technique

[0002] A power meter is an instrument used to measure electric power. According to different application fields and measurement objects, there are various types of power meters, such as electric power meters, radio frequency power meters, optical power meters, etc. Power meters are widely used in many fields such as scientific research, industrial production, communication equipment, electronic measurement and testing. The prior art uses digital power meters to monitor power. However, digital power meters have weak anti-interference ability and are prone to crashing.

[0003] Chinese Patent with publication number CN211348422U discloses a digital power meter, which performs current limiting protection through a first diode to improve the safety of the power meter. However, when this power meter faces electromagnetic interference caused by the spurious signals of the power amplifier and sudden self-excitation, it will be severely interfered and cannot obtain accurate readings. Content of the Utility Model

[0004] In view of this, the utility model provides a pointer type short-wave power meter, which processes the input radio frequency signal through an input detection circuit, then performs multi-gear processing on the detected DC signal through a gear switching circuit, and finally processes the non-linearity of the detected signal through a meter head linear correction circuit. The finally output signal directly drives a current pointer meter head to solve the problems of weak anti-interference ability of the existing power meter and inability to obtain accurate readings under electromagnetic interference.

[0005] The technical solution of the utility model is realized as follows: A pointer type short-wave power meter includes an input detection circuit, a gear switching circuit, a meter head linear correction circuit, a reference voltage circuit, a power supply circuit, and a pointer module;

[0006] The input detection circuit is electrically connected to the gear switching circuit and is used to convert the radio frequency signal into a DC signal;

[0007] The gear switching circuit is electrically connected to the meter head linear correction circuit and is used to switch different voltage gears;

[0008] The meter head linear correction circuit is electrically connected to the pointer module and is used to correct the non-linear signal;

[0009] The reference voltage circuit is electrically connected to the gear switching circuit and is used to generate reference voltage of different gears;

[0010] The power supply circuit is respectively electrically connected to the reference voltage circuit and the input detection circuit and is used to provide power supply voltage;

[0011] The pointer module is electrically connected to the meter head linear correction circuit and is used for power reading.

[0012] Based on the above technical solution, preferably, the input detection circuit includes a power detection chip U1, resistors R1, R5, R6, capacitors C4, C5, C6, C7, C8, C9, C10;

[0013] Pin 1, 7, 8, 10, 16 of the power detection chip U1 are all grounded. Pin 3 of the power detection chip U1 is electrically connected to one end of the capacitor C5, and the other end of the capacitor C5 is grounded. Pin 4 of the power detection chip U1 is electrically connected to one end of the capacitor C6, and the other end of the capacitor C6 and one end of the resistor R5 both input radio frequency signals, and the other end of the resistor R5 is grounded. Pin 5 of the power detection chip U1 is electrically connected to one end of the capacitor C4, and the other end of the capacitor C4 is grounded. Pin 6 of the power detection chip U1 is electrically connected to one end of the capacitor C7, and the other end of the capacitor C7 is grounded. Pin 9 of the power detection chip U1 is electrically connected to one end of the capacitor C8, and the other end of the capacitor C8 is grounded. Pins 11, 12 of the power detection chip U1 are electrically connected to one end of the resistor R6. Pin 13 of the power detection chip U1 is respectively electrically connected to one end of the capacitor C9, one end of the capacitor C10, and one end of the resistor R1. The other end of the capacitor C9 and the other end of the capacitor C10 are both grounded. The other end of the resistor R1 is connected to a +5V voltage. Pins 14 and 15 of the power detection chip U1 are electrically connected.

[0014] Based on the above technical solution, preferably, the gear shift circuit includes an operational amplifier A3, resistors R7, R8, R9, capacitor C17;

[0015] The positive power supply terminal of the operational amplifier A3 is connected to a +15V voltage, the negative power supply terminal of the operational amplifier A3 is grounded. The positive input terminal of the operational amplifier A3 is respectively electrically connected to one end of the resistor R7 and the other end of the resistor R6. The other end of the resistor R7 is grounded. The negative input terminal of the operational amplifier A3 is respectively electrically connected to one end of the resistor R9 and one end of the resistor R8. The output terminal of the operational amplifier A3 is electrically connected to the other end of the resistor R9. The other end of the resistor R8 is electrically connected to the positive electrode of the capacitor C17, and the negative electrode of the capacitor C17 is grounded.

[0016] Based on the above technical solution, preferably, the meter head linear correction circuit includes transistors Q1, Q2, operational amplifiers A1, A2, resistors R2, R3, R4, R10, R11, R12, R13, capacitors C1, C2, C3;

[0017] The positive power supply terminal of the operational amplifier A1 is connected to a +15V voltage, the negative power supply terminal of the operational amplifier A1 is grounded, the positive input terminal of the operational amplifier A1 is electrically connected to one end of the resistor R10, the other end of the resistor R10 is grounded, the negative input terminal of the operational amplifier A1 is respectively electrically connected to one end of the resistor R2, the voltage of the capacitor C2, and the collector of the triode Q1. The other end of the resistor R2 and one end of the capacitor C1 are connected to a +15V voltage, and the other end of the capacitor C1 is grounded. The output terminal of the operational amplifier A1 is respectively electrically connected to the other end of the capacitor C2 and one end of the resistor R3. The emitter of the triode Q1 is respectively electrically connected to the other end of the resistor R3 and the emitter of the triode Q2. The base of the triode Q1 is respectively electrically connected to one end of the resistor R11 and one end of the resistor R12. The other end of the resistor R11 is electrically connected to the output terminal of the operational amplifier A3, and the other end of the resistor R12 is grounded. The base of the triode Q2 is grounded. The collector of the triode Q2 is respectively electrically connected to one end of the resistor R4 and the negative input terminal of the operational amplifier A2. The positive input terminal of the operational amplifier A2 is electrically connected to one end of the resistor R13, the other end of the resistor R13 is grounded, the positive power supply terminal of the operational amplifier A2 is connected to a +15V voltage, the negative power supply terminal of the operational amplifier A2 is grounded, and the output terminal of the operational amplifier A2 is respectively electrically connected to the other end of the resistor R4 and one end of the capacitor C3. The other end of the capacitor C3 is grounded.

[0018] Based on the above technical solutions, preferably, the reference voltage circuit includes an adjustable shunt regulator U2, resistors R14, R15, R23, potentiometers R16, R17, R18, R19, R20, R21, R22, and capacitors C11, C12;

[0019] Pin 1 of the adjustable shunt regulator U2 is electrically connected to one end of resistor R14, one end of resistor R15, one fixed end of potentiometer R16, one fixed end of potentiometer R17, one fixed end of potentiometer R18, one fixed end of potentiometer R19, one fixed end of potentiometer R20, one fixed end of potentiometer R21, one fixed end of potentiometer R22, and the positive electrode of capacitor C12. Pin 2 of the adjustable shunt regulator U2 is grounded together with the negative electrode of capacitor C12, one end of resistor R23, and the negative electrode of capacitor C11. Pin 3 of the adjustable shunt regulator U2 is electrically connected to the other end of resistor R23 and the other end of resistor R15. The other end of resistor R14 and the positive electrode of capacitor C11 are both connected to the +5V voltage. The other fixed ends of potentiometer R16, potentiometer R17, potentiometer R18, potentiometer R19, potentiometer R20, potentiometer R21, and potentiometer R22 are all grounded. The sliding terminals of potentiometer R16, potentiometer R17, potentiometer R18, potentiometer R19, potentiometer R20, potentiometer R21, and potentiometer R22 are all electrically connected to the positive electrode of capacitor C17.

[0020] Based on the above technical solution, preferably, the power supply circuit includes a voltage regulator C14, capacitors C13, C15, and C16;

[0021] Pin 1 of voltage regulator C14 and one end of capacitor C13 are both connected to the +15V voltage. The other end of capacitor C13 is grounded. Pin 2 of voltage regulator C14 is grounded. Pin 3 of voltage regulator C14 is electrically connected to the positive electrode of capacitor C15 and one end of capacitor C16. Pin 3 of voltage regulator C14 outputs +5V voltage. The negative electrode of capacitor C15 is grounded, and the other end of capacitor C16 is grounded.

[0022] Based on the above technical solution, preferably, the pointer module includes a 0 - 10V pointer meter head; the 0 - 10V pointer meter head is electrically connected to the output end of operational amplifier A2.

[0023] Based on the above technical solution, preferably, the power detection chip U1 uses a power detector with the model number AD8362.

[0024] Based on the above technical solution, preferably, the adjustable shunt regulator U2 uses a three - terminal voltage regulator with the model number TL431.

[0025] Based on the above technical solution, preferably, the voltage regulator C14 uses a voltage regulator with the model number 78M05.

[0026] The pointer-type short-wave power meter provided by the utility model has the following beneficial effects compared with the prior art:

[0027] (1) The input radio frequency signal is processed by the input detection circuit, and then the multi-gear processing is carried out on the detected DC signal by the gear switching circuit. Finally, the non-linearity of the detection signal is processed by the meter head linear correction circuit, and the finally output signal directly drives the pointer module, and the pointer module displays the power reading, so as to realize the accurate power measurement in the electromagnetic interference environment;

[0028] (2) The input detection circuit uses the AD8362 power detector chip as the core, and cooperates with the resistor and capacitor network to realize the efficient conversion of the radio frequency signal to the DC signal, can accurately detect and process the input radio frequency power signal, and convert it into a measurable DC voltage;

[0029] (3) The precise amplification and switching of the signal are realized through the gear switching circuit. By using the cooperation of the operational amplifier and related resistors and capacitors, the appropriate gain adjustment can be carried out according to different input signal intensities, ensuring the best measurement range in different gears. The feedback and gain control are provided through the resistor configuration, and the capacitor configuration plays the role of filtering and stabilizing the output, so that the power meter can maintain a high-precision measurement effect in different power ranges. Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0031] Figure 1 It is the composition structure diagram of a pointer-type short-wave power meter of the present utility model;

[0032] Figure 2 It is the circuit structure diagram of a pointer-type short-wave power meter of the present utility model;

[0033] Figure 3 It is the wiring diagram of the input detection circuit of a pointer-type short-wave power meter of the present utility model;

[0034] Figure 4 It is the wiring diagram of the gear switching circuit of a pointer-type short-wave power meter of the present utility model;

[0035] Figure 5 It is the wiring diagram of the meter head linear correction circuit of a pointer-type short-wave power meter of the present utility model;

[0036] Figure 6 This is the wiring diagram of the reference voltage circuit of a pointer - type short - wave power meter of the present utility model;

[0037] Figure 7 This is the wiring diagram of the power supply circuit of a pointer - type short - wave power meter of the present utility model;

[0038] Figure 8 This is the wiring diagram of the pointer module of a pointer - type short - wave power meter of the present utility model. Specific embodiments

[0039] Next, in combination with the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0040] Please refer to Figure 1 and Figure 2 , this embodiment provides a pointer - type short - wave power meter, including an input detection circuit 1, a gear - shifting circuit 2, a meter head linear correction circuit 3, a reference voltage circuit 4, a power supply circuit 5, and a pointer module 6;

[0041] The input detection circuit 1 is electrically connected to the gear - shifting circuit 2 and is used to convert the radio - frequency signal into a direct - current signal;

[0042] The gear - shifting circuit 2 is electrically connected to the meter head linear correction circuit 3 and is used to switch different voltage gears;

[0043] The meter head linear correction circuit 3 is electrically connected to the pointer module 6 and is used to correct non - linear signals;

[0044] The reference voltage circuit 4 is electrically connected to the gear - shifting circuit 2 and is used to generate reference voltage of different gears;

[0045] The power supply circuit 5 is electrically connected to the reference voltage circuit 4 and the input detection circuit 1 respectively and is used to provide power supply voltage;

[0046] The pointer module 6 is electrically connected to the meter head linear correction circuit 3 and is used for power reading.

[0047] Specifically, the pointer-type short-wave power meter of this embodiment realizes high-precision power measurement in an electromagnetic interference environment through high-precision detection, multi-range switching, non-linear correction, stable reference voltage, reliable power supply, analog indication, and overall anti-interference design. The pointer-type short-wave power meter of this embodiment can effectively resist electromagnetic interference caused by spurious signals and sudden self-excitation of the power amplifier, ensuring the accuracy and reliability of the measurement results.

[0048] As Figure 2 and Figure 3 shown, the input detection circuit 1 includes a power detection chip U1, resistors R1, R5, R6, capacitors C4, C5, C6, C7, C8, C9, C10;

[0049] Pin 1, 7, 8, 10, 16 of the power detection chip U1 are all grounded. Pin 3 of the power detection chip U1 is electrically connected to one end of the capacitor C5, and the other end of the capacitor C5 is grounded. Pin 4 of the power detection chip U1 is electrically connected to one end of the capacitor C6, and the other end of the capacitor C6 and one end of the resistor R5 both input radio frequency signals, and the other end of the resistor R5 is grounded. Pin 5 of the power detection chip U1 is electrically connected to one end of the capacitor C4, and the other end of the capacitor C4 is grounded. Pin 6 of the power detection chip U1 is electrically connected to one end of the capacitor C7, and the other end of the capacitor C7 is grounded. Pin 9 of the power detection chip U1 is electrically connected to one end of the capacitor C8, and the other end of the capacitor C8 is grounded. Pins 11 and 12 of the power detection chip U1 are electrically connected to one end of the resistor R6. Pin 13 of the power detection chip U1 is respectively electrically connected to one end of the capacitor C9, one end of the capacitor C10, and one end of the resistor R1. The other end of the capacitor C9 and the other end of the capacitor C10 are both grounded. The other end of the resistor R1 is connected to a +5V voltage, and pin 14 and pin 15 of the power detection chip U1 are electrically connected.

[0050] In a specific embodiment, the power detection chip U1 uses a power detector with the model number AD8362.

[0051] Specifically, the beneficial effects of the input detection circuit 1 of this embodiment include:

[0052] Radio frequency signal conversion: accurately converts the input radio frequency signal into a direct current signal. The AD8362 power detector can process broadband radio frequency signals and is applicable to the short-wave frequency band.

[0053] Signal conditioning: realizes signal filtering and stabilization through the configuration of capacitors C4 - C10, helps reduce high-frequency noise, and improves the signal quality.

[0054] Impedance matching: sets the resistor R5 to achieve impedance matching at the input end, reduces signal reflection, and improves the measurement accuracy.

[0055] Power supply stability: The configuration of resistor R1 and capacitors C9 and C10 provides a stable power supply for the chip, reducing the impact of power supply noise on the measurement.

[0056] Output signal conditioning: Resistor R6 is connected to the output terminal of the chip for adjusting the amplitude of the output signal or impedance matching.

[0057] Anti-interference ability: Pins 1, 7, 8, 10, and 16 of the power detection chip U1 are grounded, which helps reduce ground loops and improve the anti-interference ability of the circuit.

[0058] AD8362 is a high-performance logarithmic amplifier and detector that can provide high-precision power measurement, especially in a wide dynamic range.

[0059] AD8362 has good temperature stability, which helps maintain measurement consistency at different ambient temperatures.

[0060] The input detection circuit 1 realizes the efficient conversion of RF signals to DC signals, and at the same time has good signal conditioning ability, anti-interference ability, and measurement accuracy.

[0061] The input detection circuit 1 of this embodiment uses the AD8362 power detection chip as the core, combined with a carefully designed resistor and capacitor network, to realize the efficient conversion of RF signals to DC signals. This circuit can accurately detect and process the input RF power signal and convert it into a measurable DC voltage. Through reasonable grounding and filtering designs, the noise interference is effectively reduced, and the signal-to-noise ratio of the signal is improved. In addition, the circuit design also considers impedance matching and signal stability to ensure accurate measurement in a wide frequency band range.

[0062] As Figure 2 and Figure 4 shown, the gear shift circuit 2 includes operational amplifier A3, resistors R7, R8, R9, and capacitor C17;

[0063] The positive power supply terminal of operational amplifier A3 is connected to a +15V voltage, the negative power supply terminal of operational amplifier A3 is grounded, the positive input terminal of operational amplifier A3 is electrically connected to one end of resistor R7 and the other end of resistor R6 respectively, the other end of resistor R7 is grounded, the negative input terminal of operational amplifier A3 is electrically connected to one end of resistor R9 and one end of resistor R8 respectively, the output terminal of operational amplifier A3 is electrically connected to the other end of resistor R9, the other end of resistor R8 is electrically connected to the positive electrode of capacitor C17, and the negative electrode of capacitor C17 is grounded.

[0064] In a specific embodiment, the operational amplifier A3 uses an operational amplifier with the model TLC1050.

[0065] Specifically, the gear shifting circuit 2 of this embodiment is used to achieve precise amplification and switching of signals. Through the cooperation of operational amplifier A3 (TLC1050) and related resistors and capacitors, this circuit can perform appropriate gain adjustment according to different input signal intensities to ensure the best measurement range in different gears. The configuration of resistors R7, R8, and R9 provides feedback and gain control, while capacitor C17 plays a role in filtering and stabilizing the output, enabling the power meter to maintain high-precision measurement results in different power ranges.

[0066] As Figure 2 and Figure 5 shown, the meter head linear correction circuit 3 includes transistors Q1, Q2, operational amplifiers A1, A2, resistors R2, R3, R4, R10, R11, R12, R13, capacitors C1, C2, C3;

[0067] The positive power supply terminal of operational amplifier A1 is connected to a +15V voltage, the negative power supply terminal of operational amplifier A1 is grounded, the positive input terminal of operational amplifier A1 is electrically connected to one end of resistor R10, the other end of resistor R10 is grounded, the negative input terminal of operational amplifier A1 is respectively electrically connected to one end of resistor R2, the voltage of capacitor C2, and the collector of transistor Q1. The other end of resistor R2 and one end of capacitor C1 are connected to a +15V voltage, and the other end of capacitor C1 is grounded. The output terminal of operational amplifier A1 is respectively electrically connected to the other end of capacitor C2 and one end of resistor R3. The emitter of transistor Q1 is respectively electrically connected to the other end of resistor R3 and the emitter of transistor Q2. The base of transistor Q1 is respectively electrically connected to one end of resistor R11 and one end of resistor R12. The other end of resistor R11 is electrically connected to the output terminal of operational amplifier A3, and the other end of resistor R12 is grounded. The base of transistor Q2 is grounded, and the collector of transistor Q2 is respectively electrically connected to one end of resistor R4 and the negative input terminal of operational amplifier A2. The positive input terminal of operational amplifier A2 is electrically connected to one end of resistor R13, and the other end of resistor R13 is grounded. The positive power supply terminal of operational amplifier A2 is connected to a +15V voltage, the negative power supply terminal of operational amplifier A2 is grounded, and the output terminal of operational amplifier A2 is respectively electrically connected to the other end of resistor R4 and one end of capacitor C3, and the other end of capacitor C3 is grounded.

[0068] In a specific embodiment, the operational amplifiers A1 and A2 are operational amplifiers of model TLC1050.

[0069] Specifically, the header linear correction circuit 3 of this embodiment realizes the compensation and correction of the non-linear characteristics of the DC signal by using a TLC1050 operational amplifier, a triode, and a resistor-capacitor network. This circuit can convert the non-linear input signal into a linear output, improving the accuracy and readability of power measurement. At the same time, through capacitor filtering and feedback loop design, the stability and anti-interference ability of the circuit are enhanced, ensuring accurate linear output within different measurement ranges, thus greatly improving the overall performance and reliability of the power meter.

[0070] As Figure 2 and Figure 6 shown, the reference voltage circuit 4 includes an adjustable shunt regulator U2, resistors R14, R15, R23, potentiometers R16, R17, R18, R19, R20, R21, R22, and capacitors C11, C12;

[0071] Pin 1 of the adjustable shunt regulator U2 is electrically connected to one end of resistor R14, one end of resistor R15, one fixed end of potentiometer R16, one fixed end of potentiometer R17, one fixed end of potentiometer R18, one fixed end of potentiometer R19, one fixed end of potentiometer R20, one fixed end of potentiometer R21, one fixed end of potentiometer R22, and the positive electrode of capacitor C12. Pin 2 of the adjustable shunt regulator U2 is grounded together with the negative electrode of capacitor C12, one end of resistor R23, and the negative electrode of capacitor C11. Pin 3 of the adjustable shunt regulator U2 is electrically connected to the other end of resistor R23 and the other end of resistor R15. The other end of resistor R14 and the positive electrode of capacitor C11 are both connected to the +5V voltage. The other fixed ends of potentiometers R16, R17, R18, R19, R20, R21, and R22 are all grounded. The sliding ends of potentiometers R16, R17, R18, R19, R20, R21, and R22 are all electrically connected to the positive electrode of capacitor C17.

[0072] In a specific embodiment, the adjustable shunt regulator U2 uses a three-terminal voltage regulator of model TL431.

[0073] Specifically, the reference voltage circuit 4 in this embodiment uses a TL431 adjustable shunt regulator and multiple potentiometers, combined with a resistor and capacitor network, to achieve a high-precision and adjustable reference voltage output. This circuit design not only provides a stable reference voltage but also realizes a fine voltage adjustment function through multiple potentiometers, enabling the power meter to maintain high precision within different measurement ranges.

[0074] As Figure 2 and Figure 7 shown, the power supply circuit 5 includes a voltage regulator C14, capacitors C13, C15, and C16;

[0075] Pin 1 of the voltage regulator C14 and one end of the capacitor C13 are both connected to the +15V voltage. The other end of the capacitor C13 is grounded. Pin 2 of the voltage regulator C14 is grounded. Pin 3 of the voltage regulator C14 is electrically connected to the positive electrode of the capacitor C15 and one end of the capacitor C16 respectively. Pin 3 of the voltage regulator C14 outputs a +5V voltage. The negative electrode of the capacitor C15 is grounded, and the other end of the capacitor C16 is grounded.

[0076] In a specific embodiment, the voltage regulator C14 uses a voltage regulator of model 78M05.

[0077] Specifically, the power supply circuit 5 in this embodiment is composed of a 78M05 voltage regulator and capacitors C13, C15, and C16, and is used to provide a stable and reliable power supply. This circuit converts the input +15V voltage into a stable +5V output, and at the same time filters and decouples through capacitors C13, C15, and C16, effectively suppressing power supply ripple and noise.

[0078] As Figure 2 and Figure 8 shown, the pointer module 6 includes a 0 - 10V pointer meter head; the 0 - 10V pointer meter head is electrically connected to the output end of the operational amplifier A2.

[0079] Specifically, the operating principle of a pointer - type short - wave power meter in this embodiment is as follows:

[0080] The RF signal after being coupled by the bilateral coupler is input from the RF IN port to the AD8362 detector (input detection circuit 1), and the output DC signal is processed by a differential amplifier circuit (gear - switching circuit 2); the reference voltage circuit 4 is used to generate the reference voltage for each gear and act together with this differential amplifier circuit (gear - switching circuit 2) to output the DC signal for each gear; finally, it is sent to the meter head linear correction circuit 3 to correct the non - linearity of the curve for output; the double - triode temperature compensation circuit adopted by the meter head linear correction circuit 3 can improve the accuracy of the output.

[0081] The whole power meter is designed with an analog operation circuit, without A / D, D / A, and microcontroller processing. It is simple and reliable, has extremely strong anti-interference ability against sudden noise signals, and can stably and reliably detect the power of the system for a long time.

[0082] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pointer-type shortwave power meter, characterized in that, It includes an input detection circuit (1), a gear shifting circuit (2), a meter head linear correction circuit (3), a reference voltage circuit (4), a power supply circuit (5), and a pointer module (6); The input detection circuit (1) is electrically connected to the gear shifting circuit (2) and is used to convert a radio frequency signal into a direct current signal; The gear shifting circuit (2) is electrically connected to the meter head linear correction circuit (3) and is used to switch different voltage gears; The meter head linear correction circuit (3) is electrically connected to the pointer module (6) and is used to correct a non-linear signal; The reference voltage circuit (4) is electrically connected to the gear shifting circuit (2) and is used to generate reference voltage of different gears; The power supply circuit (5) is electrically connected to the reference voltage circuit (4) and the input detection circuit (1) respectively and is used to provide a power supply voltage; The pointer module (6) is electrically connected to the meter head linear correction circuit (3) and is used for power reading.

2. The pointer-type shortwave power meter according to claim 1, wherein The input detection circuit (1) includes a power detection chip U1, resistors R1, R5, R6, capacitors C4, C5, C6, C7, C8, C9, C10; Pins 1, 7, 8, 10, and 16 of the power detection chip U1 are all grounded. Pin 3 of the power detection chip U1 is electrically connected to one end of the capacitor C5, and the other end of the capacitor C5 is grounded. Pin 4 of the power detection chip U1 is electrically connected to one end of the capacitor C6, and the other end of the capacitor C6 and one end of the resistor R5 both input a radio frequency signal, and the other end of the resistor R5 is grounded. Pin 5 of the power detection chip U1 is electrically connected to one end of the capacitor C4, and the other end of the capacitor C4 is grounded. Pin 6 of the power detection chip U1 is electrically connected to one end of the capacitor C7, and the other end of the capacitor C7 is grounded. Pin 9 of the power detection chip U1 is electrically connected to one end of the capacitor C8, and the other end of the capacitor C8 is grounded. Pins 11 and 12 of the power detection chip U1 are electrically connected to one end of the resistor R6. Pin 13 of the power detection chip U1 is electrically connected to one end of the capacitor C9, one end of the capacitor C10, and one end of the resistor R1 respectively. The other end of the capacitor C9 and the other end of the capacitor C10 are both grounded, and the other end of the resistor R1 is connected to a +5V voltage. Pins 14 and 15 of the power detection chip U1 are electrically connected.

3. The pointer-type short-wave power meter according to claim 2, characterized in that, The gear shifting circuit (2) includes an operational amplifier A3, resistors R7, R8, R9, and a capacitor C17; The positive power supply terminal of the operational amplifier A3 is connected to a +15V voltage, the negative power supply terminal of the operational amplifier A3 is grounded, the positive input terminal of the operational amplifier A3 is electrically connected to one end of the resistor R7 and the other end of the resistor R6 respectively, the other end of the resistor R7 is grounded, the negative input terminal of the operational amplifier A3 is electrically connected to one end of the resistor R9 and one end of the resistor R8 respectively, the output terminal of the operational amplifier A3 is electrically connected to the other end of the resistor R9, the other end of the resistor R8 is electrically connected to the positive electrode of the capacitor C17, and the negative electrode of the capacitor C17 is grounded.

4. The pointer type shortwave power meter according to claim 3, characterized in that, The header linear correction circuit (3) includes transistors Q1, Q2, operational amplifiers A1, A2, resistors R2, R3, R4, R10, R11, R12, R13, capacitors C1, C2, C3; The positive power supply terminal of operational amplifier A1 is connected to a +15V voltage, the negative power supply terminal of operational amplifier A1 is grounded, the positive input terminal of operational amplifier A1 is electrically connected to one end of resistor R10, the other end of resistor R10 is grounded, the negative input terminal of operational amplifier A1 is respectively electrically connected to one end of resistor R2, the voltage of capacitor C2, and the collector of transistor Q1. The other end of resistor R2 and one end of capacitor C1 are connected to a +15V voltage, the other end of capacitor C1 is grounded. The output terminal of operational amplifier A1 is respectively electrically connected to the other end of capacitor C2 and one end of resistor R3. The emitter of transistor Q1 is respectively electrically connected to the other end of resistor R3 and the emitter of transistor Q2. The base of transistor Q1 is respectively electrically connected to one end of resistor R11 and one end of resistor R12. The other end of resistor R11 is electrically connected to the output terminal of operational amplifier A3. The other end of resistor R12 is grounded. The base of transistor Q2 is grounded. The collector of transistor Q2 is respectively electrically connected to one end of resistor R4 and the negative input terminal of operational amplifier A2. The positive input terminal of operational amplifier A2 is electrically connected to one end of resistor R13. The other end of resistor R13 is grounded. The positive power supply terminal of operational amplifier A2 is connected to a +15V voltage, the negative power supply terminal of operational amplifier A2 is grounded. The output terminal of operational amplifier A2 is respectively electrically connected to the other end of resistor R4 and one end of capacitor C3. The other end of capacitor C3 is grounded.

5. The pointer type short-wave power meter according to claim 4, characterized in that, The reference voltage circuit (4) includes adjustable shunt regulators U2, resistors R14, R15, R23, slide rheostats R16, R17, R18, R19, R20, R21, R22, capacitors C11, C12; Pin 1 of the adjustable shunt regulator U2 is electrically connected to one end of resistor R14, one end of resistor R15, one fixed end of potentiometer R16, one fixed end of potentiometer R17, one fixed end of potentiometer R18, one fixed end of potentiometer R19, one fixed end of potentiometer R20, one fixed end of potentiometer R21, one fixed end of potentiometer R22, and the positive electrode of capacitor C12. Pin 2 of the adjustable shunt regulator U2 is grounded together with the negative electrode of capacitor C12, one end of resistor R23, and the negative electrode of capacitor C11. Pin 3 of the adjustable shunt regulator U2 is electrically connected to the other end of resistor R23 and the other end of resistor R15. The other end of resistor R14 and the positive electrode of capacitor C11 are both connected to the +5V voltage. The other fixed ends of potentiometer R16, potentiometer R17, potentiometer R18, potentiometer R19, potentiometer R20, potentiometer R21, and potentiometer R22 are all grounded. The sliding ends of potentiometer R16, potentiometer R17, potentiometer R18, potentiometer R19, potentiometer R20, potentiometer R21, and potentiometer R22 are all electrically connected to the positive electrode of capacitor C17.

6. The pointer type shortwave power meter according to claim 5, characterized in that, The power supply circuit (5) includes a voltage regulator C14, capacitors C13, C15, and C16; Pin 1 of voltage regulator C14 and one end of capacitor C13 are both connected to the +15V voltage. The other end of capacitor C13 is grounded. Pin 2 of voltage regulator C14 is grounded. Pin 3 of voltage regulator C14 is electrically connected to the positive electrode of capacitor C15 and one end of capacitor C16. Pin 3 of voltage regulator C14 outputs +5V voltage. The negative electrode of capacitor C15 is grounded, and the other end of capacitor C16 is grounded.

7. The pointer type shortwave power meter according to claim 6, wherein The pointer module (6) includes a 0 - 10V pointer meter head; the 0 - 10V pointer meter head is electrically connected to the output end of operational amplifier A2.

8. The pointer type short-wave power meter according to claim 7, characterized in that, The power detection chip U1 uses a power detector of model AD8362.

9. The pointer type shortwave power meter according to claim 8, characterized in that, The adjustable shunt regulator U2 uses a three - terminal voltage regulator of model TL431.

10. A pointer type short-wave power meter as described in claim 9, characterized in that, The voltage regulator C14 uses a voltage regulator of model 78M05.

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