CN204758696U - Nuclear phase sample thief circuit that alternating current circuit high accuracy is wireless - Google Patents

Abstract

The utility model relates to a high-precision wireless nuclear phase sampler circuit for an AC line, which includes a signal processing circuit. The signal processing circuit includes a front-end limiting filter circuit and a signal amplification and shaping circuit. The front-end limiting filter circuit includes a first limiter amplitude unit, a first filter unit, a second limiter unit and a second filter unit, the first limiter unit, the first filter unit, the second limiter unit and the second filter unit are connected in sequence, and the second The output end of the filtering unit is electrically connected to the input end of the signal amplification and shaping circuit. The high-precision wireless nuclear phase sampler circuit of the AC line of the utility model performs signal processing on the high-voltage induction signal through the signal processing circuit, removes the interference signal in the signal, makes the detection result more accurate, and can realize cross-voltage measurement from 2V to 500KV , with a large measurement range, simple structure and low cost, it is very suitable for wide-scale promotion and use.

Description

A high-precision wireless nuclear phase sampler circuit for AC lines

technical field

The utility model relates to the field of grid connection of high-voltage transmission lines, in particular to a high-precision wireless nuclear phase sampler circuit for AC lines.

Background technique

At present, when measuring high-voltage lines above 35KV or 66KV, the error of the instrument is relatively large. In order to avoid the interference caused by corona to the measurement of the instrument, the instrument cannot directly touch the high-voltage line when in use, and must be separated from the high-voltage line by a specified distance according to the voltage level. Since the distance between the instrument and the high-voltage line can only be measured visually, the actual operation will be more difficult. If the distance between the instrument and the high-voltage line is a little far, the sampler cannot collect effective signals. If the distance between the instrument and the high-voltage line is a little close, the measurement error will be too large, and the measurement result will be meaningless. In addition, the existing technology cannot realize cross-voltage measurement within the voltage range of 2V-500KV. Existing instruments are generally divided into special types for 5V-380V, and special types for 10KV, 35KV, 110KV, and 220KV voltage levels. When the user needs to measure across the voltage level, it is necessary to purchase multiple instruments, which increases the user's use cost. At the same time, existing instruments generally use non-rechargeable batteries, and users need to purchase new batteries to replace them during use, which not only increases the cost, but also increases the complexity of use.

Utility model content

The technical problem to be solved by the utility model is to provide a high-precision wireless nuclear phase sampler circuit for AC lines in view of the above-mentioned deficiencies in the prior art.

The technical solution of the utility model for solving the above-mentioned technical problems is as follows: a high-precision wireless nuclear phase sampler circuit for AC lines, including a signal processing circuit, the signal processing circuit includes a front-end limiting filter circuit and a signal amplification and shaping circuit, the front-end The limiting filter circuit includes a first limiting unit, a first filtering unit, a second limiting unit and a second filtering unit, and the first limiting unit, the first filtering unit, the second limiting unit and the second filtering unit connected in sequence, the output end of the second filtering unit is electrically connected to the input end of the signal amplification and shaping circuit.

The beneficial effects of the utility model are: a high-precision wireless nuclear phase sampler for an AC line of the utility model can be directly contacted with a high-voltage line for measurement, and the high-voltage induction signal is processed by the signal processing circuit to remove the interference in the signal signal, which makes the detection result more accurate, and can realize 2V to 500KV cross-voltage measurement, with a large measurement range, simple structure, and low cost, which is very suitable for large-scale promotion and use.

On the basis of the above technical solution, the utility model can also be improved as follows:

Further: the specific circuit structure of the front-end limiting filter circuit is as follows: the first limiting unit includes a resistor R0, a transient bidirectional voltage regulator diode T1, an inductor L1 and a capacitor C1, and an external high-voltage line induction signal is input to the resistor R0 One end of the resistor R0, the other end of the resistor R0 is connected to the positive pole of the transient bidirectional voltage regulator diode T1, the negative pole of the transient bidirectional voltage regulator diode T1 is grounded through the inductor L1, and the capacitor C1 is connected in parallel to the Both ends of the inductor L1; the first filtering unit includes a resistor R1, an inductor L2, a capacitor C2, and a capacitor C3, and one end of the resistor R1 is connected to the common end of the resistor R0 and the transient bidirectional voltage regulator diode T1, so The other end of the resistor R1 is grounded through the capacitor C2, and the inductor L2 and the capacitor C3 are connected in series between the two ends of the capacitor C2; the second limiting unit includes a transient bidirectional voltage regulator diode T2 , the anode of the transient bidirectional voltage regulator diode T2 is connected to the common end of the cable L2 and the capacitor C3, and the negative pole of the transient bidirectional voltage regulator diode T2 is grounded; the second filter unit includes a resistor R2, a resistor R3 , capacitor C4 and capacitor C5, the two ends of the transient bidirectional voltage regulator diode T2 are also connected in series with the resistor R2 and the capacitor C4 in series, and the two ends of the capacitor C4 are also connected in series in sequence The resistor R3 and the capacitor C5, the common end of the resistor R3 and the capacitor C5 are connected to the input end of the signal amplification and shaping circuit.

The beneficial effect of the above further solution is that the front-end limiting and filtering circuit performs two limiting and two filtering to ensure that the interference components in the signal are completely filtered out and the accuracy of the detection result is ensured.

Further: the signal amplification and shaping circuit includes a resistor R8, a resistor R9, a resistor R10, a transistor Q2 and a trigger U4, and the resistor R10, resistor R8 and resistor R9 are serially connected in series between the collector and the base of the transistor Q2 Between, the common terminal of the resistor R8 and the resistor R9 is connected to the base of the transistor Q2, the common terminal of the resistor R8 and the resistor R9 is also connected to the common terminal of the resistor R3 and the capacitor C5, and the transistor Q2 The collector of the trigger U4 is connected to the No. 1 pin, the No. 2 pin of the trigger U4 is connected to the No. 3 pin, the No. 4 pin is connected to the No. 5 pin, and the No. 6 pin is externally output Detection signal, pin 7 is grounded, and pin 14 is connected to power supply VCC.

The beneficial effect of the above further solution is: through the signal amplification and shaping circuit, the rising/falling edge of the input signal is made steeper, and the processed low-level initial phase value is close to the zero-crossing point of the input signal, thereby reducing the phase error caused by the circuit.

Further: it also includes a startup circuit, the startup circuit includes a resistor R4, a resistor R5, a resistor R6, a capacitor C6, a capacitor C7, a capacitor C8, a diode D1, a transistor Q1, a transient bidirectional voltage regulator diode T3, a switch SW1 and a boost chip U3, one end of the resistor R4 is connected to the common end of the resistor R0 and the resistor R1, the other end of the resistor R4 is connected to the base of the transistor Q1, and the base of the transistor Q1 is connected to the transient The anode of the bidirectional zener diode T3 is connected, the cathode of the transient bidirectional zener diode T3 is grounded, the resistor R5 and the capacitor C6 are connected in parallel between the emitter of the triode Q1 and the ground, and the collector of the triode Q1 connected to an external power supply, the collector of the triode Q1 is also connected to the static contact of the switch SW1 through the resistor R6, the first movable contact of the switch SW1 is connected to the anode of the diode, and the diode The negative pole of D1 is connected to the No. 3 pin of the boost chip U3, the No. 1 pin of the boost chip U3 outputs the voltage VCC to the outside, the No. 1 pin is also grounded through the capacitor C8, and the No. 2 pin is grounded , the No. 4 pin is connected to the negative pole of the capacitor C7, the No. 6 pin is connected to the positive pole of the capacitor C7, and the No. 5 pin is connected to the external power supply.

The beneficial effect of the above further solution is: through the switch SW1, it is convenient for the user to select the self-starting or switch starting mode.

Further: It also includes a protection circuit, the protection circuit includes a pin header H3, a diode D3, a resistor R12, a transient bidirectional voltage regulator diode T4, a transient bidirectional voltage regulator diode T5, a transient bidirectional voltage regulator diode T6, a capacitor C10, and a capacitor C11 and capacitor C12, the transient bidirectional voltage regulator diode T4 and capacitor C10 are connected in parallel between the No. 1 pin of the pin header H3 and the ground, and the No. 1 pin of the pin header H3 also passes through the resistor R12 It is connected to the cathode of the diode D3, the anode of the diode D3 is connected to the power supply VCC, and the transient bidirectional voltage regulator diode T5 and the capacitor C11 are connected in parallel between the No. 2 pin of the pin header H3 and the ground , the transient bidirectional voltage regulator diode T6 and the capacitor C12 are connected in parallel between the No. 3 pin of the pin header H3 and the ground.

The beneficial effect of the above further solution is that: through the protection circuit, the corona phenomenon in the circuit can be prevented from causing components in the circuit to be broken down by high-voltage corona.

Further: it also includes a charging circuit, the charging circuit includes a fuse F1, a diode D2, a resistor R7, a battery BT1, an indicator LED1, an indicator LED2 and a charging chip U2, the No. 1 pin of the charging chip U2 is grounded, and the No. 2 pin is grounded. The pins are grounded through resistor R7, pin 3 is grounded, pin 4 and pin 8 are respectively connected to the positive pole of the external power supply, the negative pole of the external power supply is grounded through the fuse F1, and pin 5 is respectively connected to the positive pole of the battery BT1 It is connected to the collector of the triode Q1, the negative pole of the battery BT1 is connected to the ground, the No. 7 pin is connected to the negative pole of the indicator LED1, and the negative pole of the indicator LED1 is also connected to the No. 3 pin of the pin header H3 connection, the No. 6 pin is connected to the negative pole of the indicator LED2, the negative pole of the indicator LED2 is also connected to the No. 2 pin of the pin header H3, and the positive pole of the indicator LED1 is connected to the indicator LED2 and the common end of the two is connected to the No. 1 pin of the pin header H3, the positive pole of the external power supply is also connected to the positive pole of the diode D2, and the negative pole of the diode D2 is connected to the resistor R12 and the The common terminal connection of diode D3.

The beneficial effect of the above further scheme is: the charging circuit can provide power for the signal processing circuit more conveniently, the battery in the charging circuit is a rechargeable battery, which can be charged and used repeatedly, energy saving and environmental protection, green and low carbon, Effectively reduce costs.

Description of drawings

Fig. 1 is a kind of AC line high-precision wireless nuclear phase sampler circuit structure schematic diagram of the utility model;

Fig. 2 is a front-end limiter filter circuit diagram in a kind of AC line high-precision wireless nuclear phase sampler circuit of the utility model;

Fig. 3 is the circuit diagram of signal amplification and shaping in the circuit of a kind of AC line high-precision wireless nuclear phase sampler circuit of the present utility model;

Fig. 4 is a starting circuit diagram in a kind of AC line high-precision wireless nuclear phase sampler circuit of the present utility model;

Fig. 5 is a protection circuit diagram in the circuit of a high-precision wireless nuclear phase sampler for AC lines of the present invention;

Fig. 6 is a charging circuit diagram in a high-precision wireless nuclear phase sampler circuit of an AC line of the present invention.

In the accompanying drawings, the list of parts represented by each label is as follows:

1. Signal processing circuit, 2. Starting circuit, 3. Protection circuit, 4. Charging circuit;

11. Front-end limiting filter circuit, 12. Signal amplification and shaping circuit;

111. A first limiting unit. 112. A first filtering unit. 113. A second limiting unit. 114. A second filtering unit.

Detailed ways

The principles and features of the present utility model are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the utility model, and are not used to limit the scope of the utility model.

As shown in Figure 1, a schematic diagram of the circuit structure of an AC line high-precision wireless nuclear phase sampler, including a signal processing circuit 1, the signal processing circuit 1 includes a front-end limiting filter circuit 11 and a signal amplification and shaping circuit 12, the front-end Limiting filtering circuit 11 comprises first limiting unit 111, first filtering unit 112, second limiting unit 113 and second filtering unit 114, described first limiting unit 111, first filtering unit 112, second limiting unit The amplitude unit 113 is connected to the second filtering unit 114 in sequence, and the output end of the second filtering unit 114 is electrically connected to the input end of the signal amplification and shaping circuit 12 .

Specifically, FIG. 2 is a circuit diagram of the signal processing circuit 11 . Wherein, the first limiting unit 111 includes a resistor R0, a transient bidirectional voltage regulator diode T1, an inductor L1 and a capacitor C1, an external high voltage line induction signal is input to one end of the resistor R0, and the other end of the resistor R0 is connected to the The anode of the transient bidirectional voltage regulator diode T1 is connected, the negative pole of the transient bidirectional voltage regulator diode T1 is grounded through the inductor L1, and the capacitor C1 is connected in parallel at both ends of the inductor L1; the first filtering unit 112 includes a resistor R1, an inductor L2, a capacitor C2 and a capacitor C3, one end of the resistor R1 is connected to the common end of the resistor R0 and the transient bidirectional voltage regulator diode T1, and the other end of the resistor R1 passes through the capacitor C2 Grounded, the inductance L2 and the capacitor C3 are serially connected between the two ends of the capacitor C2; the second limiting unit 113 includes a transient bidirectional voltage regulator diode T2, and the transient bidirectional voltage regulator diode T2 The positive pole of the cable L2 and the common end of the capacitor C3 are connected, and the negative pole of the transient bidirectional voltage regulator diode T2 is grounded; the second filtering unit 114 includes a resistor R2, a resistor R3, a capacitor C4, and a capacitor C5. The two ends of the transient bidirectional voltage regulator diode T2 are connected in series with the resistor R2 and the capacitor C4 in series, and the resistor R3 and the capacitor C5 are connected in series between the two ends of the capacitor C4. The common terminal of the resistor R3 and the capacitor C5 is connected to the input terminal of the signal amplification and shaping circuit.

Wherein, the transient bidirectional voltage regulator diode T1 is a 50V transient bidirectional voltage regulator diode, and constitutes a first-stage limiting circuit with the inductor L1 and the capacitor C1, which limits the input voltage within ±50V and protects the following circuit components. Function, the inductance L1 can weaken the pulse interference introduced by the transient bidirectional voltage regulator diode T1 and the pulse interference of high-voltage corona. The power of the inductor L1 is too large under the condition of a large number of continuous sharp pulses, and it may be burned due to excessive heating power. The capacitor C1 can eliminate the sharp pulses in time, and the capacitor C1 also plays a role in protecting the inductor of L1. The transient bidirectional voltage regulator diode T2 is a 6V transient bidirectional voltage regulator diode, which limits the input signal within ±6V. It can not only protect the subsequent circuit, but also remove the signal volume greater than 6V, thereby improving the effect of the filter circuit. R1, L2, C2, and C3 constitute the first-stage filter circuit, which mainly eliminates clutter pulse signals with frequencies above 1KHz and weakens clutter signals with frequencies above 100Hz. R2, R3, C4, and C5 form a second-stage filter circuit to further eliminate clutter interference. The front-end limiting and filtering circuit performs twice limiting and filtering to ensure that the interference components in the signal are completely filtered out and the accuracy of the detection result is ensured.

As shown in FIG. 3 , in this embodiment, the signal amplification and shaping circuit 12 includes a resistor R8, a resistor R9, a resistor R10, a transistor Q2 and a trigger U4, and the resistor R10, the resistor R8 and the resistor R9 are connected in series in sequence. Between the collector and the base of the transistor Q2, the common end of the resistor R8 and the resistor R9 is connected to the base of the transistor Q2, and the common end of the resistor R8 and the resistor R9 is also connected to the resistor R3 and the capacitor The common end of C5 is connected, the collector of the triode Q2 is connected to the No. 1 pin of the flip-flop U4, the No. 2 pin of the flip-flop U4 is connected to the No. 3 pin, and the No. 4 pin is connected to the No. 5 pin. Pin connection, pin 6 outputs detection signal, pin 7 is grounded, pin 14 is connected to power supply VCC. Through the signal amplification and shaping circuit 12, the rising/falling edge of the input signal is made steeper, and the processed low-level initial phase value is close to the zero-crossing point of the input signal, thereby reducing the phase error caused by the filter circuit.

In this embodiment, the trigger U4 is preferably CD40106. The CD40106 consists of six Schmitt trigger circuits. Each circuit is an inverter with a Schmitt trigger function at both inputs. The flip-flop turns on and off at different points of the rising and falling edges of the signal, and the difference between the rising voltage (VT+) and falling voltage (VT-) is defined as the hysteresis voltage. Of course, other signal triggers can also be used, such as: 74LS18, CD4093, etc. There is no limitation here.

As shown in Figure 4, in this embodiment, a start-up circuit 2 is also included, and the start-up circuit 2 includes a resistor R4, a resistor R5, a resistor R6, a capacitor C6, a capacitor C7, a capacitor C8, a diode D1, a transistor Q1, a transient bidirectional Zener diode T3, switch SW1 and boost chip U3, one end of the resistor R4 is connected to the common end of the resistor R0 and the resistor R1, and the other end of the resistor R4 is connected to the base of the triode Q1, so The base of the transistor Q1 is connected to the anode of the transient bidirectional voltage regulator diode T3, the cathode of the transient bidirectional voltage regulator diode T3 is grounded, and the resistor R5 is connected in parallel between the emitter of the transistor Q1 and the ground. and capacitor C6, the collector of the transistor Q1 is connected to an external power supply, the collector of the transistor Q1 is also connected to the static contact of the switch SW1 through the resistor R6, and the first movable contact of the switch SW1 It is connected to the anode of the diode, the cathode of the diode D1 is connected to the No. 3 pin of the boost chip U3, and the No. 1 pin of the boost chip U3 outputs the voltage VCC to the outside, and the No. 1 pin also passes through The capacitor C8 is grounded, the 2nd pin is grounded, the 4th pin is connected to the negative pole of the capacitor C7, the 6th pin is connected to the positive pole of the capacitor C7, and the 5th pin is connected to an external power supply. Through the switch SW1, it is convenient for the user to select the self-starting mode or the switch starting mode. When the automatic start mode is selected, if the voltage of the external high-voltage line exceeds 4KV, pin 3 of U3 will be at high level, U3 will start to work and output 5V voltage, and the instrument will start; The above switch SW1 is manually activated. The advantage of the self-starting mode is that it is easy to use. The instrument will start when it touches the high-voltage line, and it will automatically shut down after leaving the high-voltage line.

Wherein, the model of the boost chip U3 is LTC1754. LTC1754 is used to boost the 1.5V-4.2V voltage to 5V voltage and provide the starting voltage for the signal amplification and shaping circuit. Of course, we can also use other boost chips, such as AX5201, AX5511, etc. There is no limitation here.

As shown in Figure 5, in this embodiment, a protection circuit 3 is also included, and the protection circuit 3 includes a pin header H3, a diode D3, a resistor R12, a transient bidirectional voltage regulator diode T4, a transient bidirectional voltage regulator diode T5, a transient bidirectional voltage regulator diode T5, and a transient bidirectional voltage regulator diode T5. Variable bidirectional voltage regulator diode T6, capacitor C10, capacitor C11 and capacitor C12, the transient bidirectional voltage regulator diode T4 and capacitor C10 are connected in parallel between the No. 1 pin of the pin header H3 and the ground, and the pin header H3 The No. 1 pin is also connected to the cathode of the diode D3 through the resistor R12, the anode of the diode D3 is connected to the power supply VCC, and the No. 2 pin of the pin header H3 is connected in parallel with the ground. The transient bidirectional voltage regulator diode T5 and the capacitor C11 are connected in parallel between the No. 3 pin of the pin header H3 and the ground. The transient bidirectional voltage regulator diode T6 and the capacitor C12 are connected in parallel. Through the protection circuit 3 , it is possible to prevent the occurrence of corona phenomenon in the circuit and cause components in the circuit to be broken down by high-voltage corona. In order to avoid the influence of the corona pulse on the circuit, pin 1 of H3 is protected by transient bidirectional voltage regulator diode T4 and capacitor C10; pin 2 of H3 is protected by transient bidirectional voltage regulator diode T5 and capacitor C11; Diode T6 and capacitor C12 protect pin 3 of H3. At the same time, this circuit also protects indicator LED1 and indicator LED2 to prevent them from being broken down by high-voltage corona.

As shown in Figure 6, in this embodiment, a charging circuit 4 is also included, and the charging circuit 4 includes a fuse F1, a diode D2, a resistor R7, a battery BT1, an indicator LED1, an indicator LED2 and a charging chip U2. The No. 1 pin of the chip U2 is grounded, the No. 2 pin is grounded through the resistor R7, the No. 3 pin is grounded, the No. 4 pin and the No. 8 pin are respectively connected to the positive pole of the external power supply, and the negative pole of the external power supply is grounded through the fuse F1. The No. 5 pin is respectively connected to the positive pole of the battery BT1 and the collector of the triode Q1, the negative pole of the battery BT1 is connected to the ground, the No. 7 pin is connected to the negative pole of the indicator light LED1, and the negative pole of the indicator light LED1 is also connected to the ground. It is connected to pin No. 3 of the pin header H3, pin No. 6 is connected to the negative pole of the indicator light LED2, and the negative pole of the indicator light LED2 is also connected to pin No. 2 of the pin header H3. The anode of the indicator LED1 is connected to the anode of the indicator LED2, and the common end of the two is connected to the No. 1 pin of the pin header H3, and the anode of the external power supply is also connected to the anode of the diode D2. The cathode of D2 is connected to the common end of the resistor R12 and the diode D3. The charging circuit 4 can conveniently provide power for the signal processing circuit. The battery in the charging circuit 4 is a rechargeable battery, which can be recharged and used repeatedly. It is energy-saving, environmentally friendly, green and low-carbon, and effectively reduces costs.

Wherein, the model of the charging chip U2 is TP4056. The TP4056 is a complete single-cell lithium-ion battery using a constant current/constant voltage linear charger. The SOP8/MSOP8 package with a heat sink on the bottom and a small number of external components make the TP4056 an ideal choice for portable applications. The TP4056 can Suitable for USB power and adapter power work. Of course, other charging chips can also be used here, as long as the charging of the battery BT1 can be completed, so there is no limitation here.

A high-precision wireless nuclear phase sampler for AC lines of the utility model can be directly contacted with a high-voltage line for measurement, and the signal processing circuit performs signal processing on the high-voltage induction signal to remove the interference signal in the signal, so that the detection result is more accurate. It can realize 2V to 500KV cross-voltage measurement, has a large measurement range, simple structure, and low cost, and is very suitable for wide-scale promotion and use.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (6)

1. a kind of AC line high-precision wireless nuclear phase sampler circuit, it is characterized in that: comprise signal processing circuit (1), described signal processing circuit (1) comprises front-end limiting filter circuit (11) and signal amplification shaping circuit ( 12), the front-end limiting and filtering circuit (11) includes a first limiting unit (111), a first filtering unit (112), a second limiting unit (113) and a second filtering unit (114), the The first limiting unit (111), the first filtering unit (112), the second limiting unit (113) and the second filtering unit (114) are connected in sequence, and the output terminal of the second filtering unit (114) is connected with The input end of the signal amplification and shaping circuit (12) is electrically connected. 2. according to the described a kind of AC line high-precision wireless nuclear phase sampler circuit of claim 1, it is characterized in that: the concrete circuit structure of described front-end limiting filter circuit (11) is as follows: The first limiting unit (111) includes a resistor R0, a transient bidirectional voltage regulator diode T1, an inductor L1, and a capacitor C1. An external high voltage line induction signal is input to one end of the resistor R0, and the other end of the resistor R0 is connected to the The anode of the transient bidirectional voltage regulator diode T1 is connected, the negative pole of the transient bidirectional voltage regulator diode T1 is grounded through the inductor L1, and the capacitor C1 is connected in parallel at both ends of the inductor L1; The first filter unit (112) includes a resistor R1, an inductor L2, a capacitor C2, and a capacitor C3, one end of the resistor R1 is connected to the common end of the resistor R0 and the transient bidirectional voltage regulator diode T1, and the resistor R1 The other end of the capacitor C2 is grounded through the capacitor C2, and the inductor L2 and the capacitor C3 are connected in series between the two ends of the capacitor C2; The second limiting unit (113) includes a transient bidirectional voltage regulator diode T2, the anode of the transient bidirectional voltage regulator diode T2 is connected to the common end of the cable L2 and the capacitor C3, and the transient bidirectional voltage regulator diode T2 The cathode of diode T2 is grounded; The second filtering unit (114) includes a resistor R2, a resistor R3, a capacitor C4, and a capacitor C5, and the two ends of the transient bidirectional voltage regulator diode T2 are connected in series with the resistor R2 and the capacitor C4 in series, The resistor R3 and the capacitor C5 are serially connected between the two ends of the capacitor C4, and the common end of the resistor R3 and the capacitor C5 is connected to the input end of the signal amplification and shaping circuit. 3. a kind of AC line high-precision wireless nuclear phase sampler circuit according to claim 2, is characterized in that: described signal amplification shaping circuit (12) comprises resistance R8, resistance R9, resistance R10, triode Q2 and trigger U4 , the resistor R10, the resistor R8 and the resistor R9 are serially connected between the collector and the base of the transistor Q2, the common end of the resistor R8 and the resistor R9 is connected to the base of the transistor Q2, the The common end of the resistor R8 and the resistor R9 is also connected to the common end of the resistor R3 and the capacitor C5, the collector of the triode Q2 is connected to the No. 1 pin of the flip-flop U4, and the No. 2 pin of the flip-flop U4 Pin 3 is connected to pin 4, pin 4 is connected to pin 5, pin 6 outputs detection signal, pin 7 is grounded, pin 14 is connected to power supply VCC. 4. a kind of AC line high-precision wireless nuclear phase sampler circuit according to claim 2, is characterized in that: also comprise start-up circuit (2), and described start-up circuit (2) comprises resistance R4, resistance R5, resistance R6, Capacitor C6, capacitor C7, capacitor C8, diode D1, transistor Q1, transient bidirectional voltage regulator diode T3, switch SW1 and boost chip U3, one end of the resistor R4 is connected to the common end of the resistor R0 and the resistor R1, The other end of the resistor R4 is connected to the base of the transistor Q1, the base of the transistor Q1 is connected to the anode of the transient bidirectional voltage regulator diode T3, and the cathode of the transient bidirectional voltage regulator diode T3 is grounded , the resistor R5 and capacitor C6 are connected in parallel between the emitter of the triode Q1 and the ground, the collector of the triode Q1 is connected to an external power supply, and the collector of the triode Q1 is also connected to the The static contact of the switch SW1 is connected, the first movable contact of the switch SW1 is connected to the anode of the diode, the cathode of the diode D1 is connected to the No. 3 pin of the boost chip U3, and the boost The No. 1 pin of the chip U3 outputs the voltage VCC to the outside, the No. 1 pin is also grounded through the capacitor C8, the No. 2 pin is grounded, the No. 4 pin is connected to the negative pole of the capacitor C7, and the No. 6 pin is connected to the capacitor C7. The positive electrode of capacitor C7 is connected, and pin 5 is connected to an external power supply. 5. a kind of AC line high-precision wireless nuclear phase sampler circuit according to claim 4, is characterized in that: also comprise protection circuit (3), and described protection circuit (3) comprises row pin H3, diode D3, resistance R12 , a transient bidirectional voltage regulator diode T4, a transient bidirectional voltage regulator diode T5, a transient bidirectional voltage regulator diode T6, a capacitor C10, a capacitor C11, and a capacitor C12, and the No. 1 pin of the pin header H3 is connected in parallel with the ground The transient bidirectional voltage regulator diode T4 and the capacitor C10, the No. 1 pin of the pin header H3 is also connected to the cathode of the diode D3 through the resistor R12, and the anode of the diode D3 is connected to the power supply VCC , the transient bidirectional voltage regulator diode T5 and capacitor C11 are connected in parallel between the No. 2 pin of the pin header H3 and the ground, and the transient bidirectional voltage regulator diode T5 and the capacitor C11 are connected in parallel between the No. Bidirectional Zener diode T6 and capacitor C12. 6. a kind of AC line high-precision wireless nuclear phase sampler circuit according to claim 5, is characterized in that: also comprise charging circuit (4), and described charging circuit (4) comprises fuse F1, diode D2, resistance R7, The battery BT1, the indicator light LED1, the indicator light LED2 and the charging chip U2, the No. 1 pin of the charging chip U2 is grounded, the No. 2 pin is grounded through the resistor R7, the No. 3 pin is grounded, and the No. 4 pin is connected to the No. 8 lead The pins are respectively connected to the positive pole of the external power supply, the negative pole of the external power supply is grounded through the fuse F1, the No. 5 pin is respectively connected to the positive pole of the battery BT1 and the collector of the triode Q1, the negative pole of the battery BT1 is connected to the ground, and the No. 7 pin connected to the negative pole of the indicator light LED1, the negative pole of the indicator light LED1 is also connected to the No. The negative pole of the pin header H3 is also connected to the No. 2 pin, the positive pole of the indicator light LED1 is connected to the positive pole of the indicator light LED2, and the common end of the two is connected to the No. 1 pin of the pin header H3. The anode of the external power supply is also connected to the anode of the diode D2, and the cathode of the diode D2 is connected to the common end of the resistor R12 and the diode D3.