CN116047155A - Electronic detonator current and voltage detection method - Google Patents

Abstract

The invention discloses a method for detecting current and voltage of an electronic detonator, which comprises the following steps: after the singlechip receives a command for controlling the bus voltage, the AB pole bus is in an electrified state through a motor driver; the voltage values on the two buses are sampled through a singlechip and combined with a resistor voltage dividing circuit and a multistage operational amplifier circuit, the voltage difference is obtained through calculation, the voltage condition on the AB is obtained, and when the current is detected, the corresponding current condition is obtained through calculation by detecting the voltage value on the low-level bus. The invention solves the safety problem of the use of the electronic detonator and improves the accuracy of the detection of the current and the voltage of the electronic detonator.

Description

Electronic detonator current and voltage detection method

technical field

The invention relates to the technical field of electronic detonator control, in particular to a method for detecting the current and voltage of an electronic detonator.

Background technique

At present, the electronic detonator is a new type of detonator that uses a digital control chip to precisely control the detonation process. Its advantages are: mature technology, better performance, and easy control. Its precise multi-stage delay setting provides feasible conditions for large-scale precise blasting. In the specific use of electronic detonators, it is necessary to use the detonator card to detect whether the detonator is in normal state and to ensure the reliability and safety during use.

In the existing electronic detonator current and voltage detection methods, the range of current detection is limited, and the detection accuracy in the case of small currents is not good.

Contents of the invention

The main purpose of the present invention is to provide a reliable and efficient electronic detonator current and voltage detection method for two-bus dual-resistance circuits, to solve the safety problem of electronic detonator use, and to improve the accuracy of electronic detonator current and voltage detection.

In order to achieve the above object, the present invention proposes a method for detecting current and voltage of an electronic detonator, which is applied to a current and voltage detection circuit. A single-chip microcomputer connected to the circuit, the resistance voltage divider circuit is connected with the sampling resistance, and the method comprises the following steps:

After the single-chip microcomputer receives the control bus voltage command, the AB pole bus is powered on through the motor driver;

Sampling the voltage values on the two buses through a single-chip microcomputer combined with a resistor divider circuit and a multi-stage operational amplifier circuit, and obtaining the voltage difference through calculation to obtain the voltage on the AB pole. When detecting the current, by detecting the low The voltage value on the level bus is calculated to obtain the corresponding current situation.

Wherein, the multi-stage op-amp amplifier circuit includes: a first-stage op-amp amplifier circuit and a second-stage op-amp amplifier circuit connected in series in sequence, the first-stage op-amp amplifier circuit is connected in series with the resistor divider circuit, and the through The single-chip microcomputer combines the resistance divider circuit and the multi-stage op-amp amplifier circuit to sample the voltage values on the two buses, and obtain the voltage difference through calculation to obtain the voltage situation on the AB pole. When detecting the current, by detecting the low voltage The voltage value on the flat bus, the steps to obtain the corresponding current situation through calculation include:

When the single-chip microcomputer receives the command to obtain the current, the single-chip microcomputer judges the level of the AB pole according to the current power-on state, and determines the low-level bus;

Obtain the sampling voltage of the second-stage op-amp amplifier circuit on the low-level bus;

Judging whether the sampling voltage of the two-stage op-amp amplifier circuit reaches the full-scale condition;

If so, then obtain the sampling voltage of the first-level operational amplifier circuit, and judge whether the sampling voltage of the first-level operational amplifier circuit reaches the full-scale condition;

If so, then obtain the sampling voltage of the resistance voltage divider circuit;

Calculate the voltage parameter according to the sampling voltage of the resistance voltage divider circuit;

The current value is calculated according to the voltage parameter.

Wherein, the voltage values on the two buses are sampled by the single-chip microcomputer combined with the resistance voltage divider circuit and the multi-stage op-amp amplifier circuit, and the voltage difference is obtained through calculation to obtain the voltage situation on the AB pole, when the current is detected , by detecting the voltage value on the low-level bus, the step of obtaining the corresponding current situation through calculation also includes:

When the single-chip microcomputer receives the acquisition voltage command, the sampling voltage of the resistance voltage divider circuit on the AB pole is obtained by the single-chip microcomputer, and the sampling voltage value of the AB pole is obtained;

By judging the sampled voltage value of the AB pole, the voltage difference between the two is calculated, and the voltage on the AB pole is obtained by combining the calculated voltage difference.

Wherein, after the single-chip microcomputer receives the control bus voltage command, before the step of making the AB pole bus in the power-on state through the motor driver, it also includes:

Connect the detonation card to an external serial port device, connect it to the computer, open the serial port debugging tool on the computer, select the port number and serial port baud rate, and ensure that the communication is normal.

Wherein, after the single-chip microcomputer receives the control bus voltage command, the step of making the AB pole bus in the power-on state through the motor driver includes:

After the MCU receives the control bus voltage command, it switches and controls the OUT+ and OUT- output pins of the AB pole by controlling the ENABLE pin of the motor driver, so that the AB pole bus is in a power-on state; by controlling the PHASE pin of the motor driver , to control the direction of the current passing through the H-bridge of the motor driver to realize the switching of AB extremely high and low level.

Wherein, the method also includes:

View the returned data packet in the receiving box on the serial port debugging tool, convert the intercepted data content through the IEEE754 binary floating-point number arithmetic standard to obtain the real result.

Wherein, the resistance voltage divider circuit includes two voltage divider resistors, and the method also includes:

By adjusting the ratio of the resistance values of the two voltage divider resistors, the sampling voltage of the AB pole is within the sampling range.

Wherein, the one-stage operational amplifier amplifier circuit adopts a proportional amplifier circuit in the same direction, and the method also includes:

By adjusting the resistance ratio of the two op-amp resistors in the first-stage op-amp amplifier circuit, the amplification factor of the op-amp is obtained, and the sampling voltage after amplifying the voltage from microvolts to millivolts reaches the sampling range.

Wherein, the AB pole bus is the bus used by the detonating card to supply power and communicate with the electronic detonator, and the operational amplifier of the second-stage op-amp amplifier circuit and the first-stage op-amp amplifier circuit have different amplification factors.

Wherein, the resistance voltage division multiple of the resistance voltage divider circuit: β1=12; the primary amplification multiple of the primary op-amp amplifier circuit: β2=7.8; the secondary amplification multiple of the secondary operational amplifier amplifier circuit: β3=31.

Technical effect of the present invention:

This scheme designed a reliable and efficient current and voltage detection method for two-bus dual-resistance circuits. The key technology is to use a layer of voltage divider circuit and multi-stage operational amplifier circuit to amplify the voltage data hierarchically. The advanced ADC collects the sampling voltage and obtains the current and voltage data on the AB pole bus through calculation, which solves the safety problem of the use of electronic detonators and improves the accuracy of current and voltage detection of electronic detonators.

Description of drawings

Fig. 1 is the schematic flow sheet of electronic detonator current and voltage detection method of the present invention;

Fig. 2 is the structural representation of current and voltage detection circuit of the present invention;

3 is a schematic diagram of the AB pole drive circuit involved in the solution of the present invention;

Fig. 4 is the current and voltage detection circuit schematic diagram of the present invention to A pole test;

Fig. 5 is a schematic diagram of the current and voltage detection circuit of the B pole test in the present invention;

Fig. 6 is the current detection flowchart of detonating card of the present invention;

Fig. 7 is a flow chart of the voltage detection of the detonation card of the present invention.

Detailed ways

It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

With reference to Fig. 1, the present invention proposes a kind of electronic detonator current and voltage detection method, is used for sampling the current and the voltage of the sampling resistance of two bus AB poles, in conjunction with Fig. 3 and shown in Fig. 4, electronic detonator current and voltage detection method of the present invention include:

Step S10, after the single-chip microcomputer receives the control bus voltage command, the AB pole bus is powered on through the motor driver;

Step S20: Sampling the voltage values on the two buses through a single-chip microcomputer combined with a resistor divider circuit and a multi-stage operational amplifier circuit, and obtaining the voltage difference through calculation to obtain the voltage on the AB pole. When detecting the current, By detecting the voltage value on the low-level bus, the corresponding current situation is obtained through calculation.

As shown in Figures 2-7, the current and voltage detection circuit involved in this method includes: a resistor divider circuit connected in series, a multi-stage operational amplifier amplifier circuit, and a single-chip microcomputer connected to the series circuit, the resistor divider circuit and the Sampling resistor connection; where:

The AB poles of the two buses are the AB poles of the bus for the electronic detonator to be powered and communicated by the detonating card;

The resistor voltage divider circuit is used to divide the voltage flowing through the sampling resistor;

The multi-stage operational amplifier circuit is used to amplify the voltage of the sampling resistor in stages;

By dividing and amplifying the voltage of the sampling resistor, the sampling voltage thereof is within the sampling range of the single-chip microcomputer;

The single-chip microcomputer is used to sample the voltage values on the two buses, and obtain the voltage difference through calculation to obtain the voltage situation on the AB pole. When detecting the current, by detecting the voltage value on the low-level bus, by calculating Get the corresponding current situation.

Wherein, the multi-stage op-amp amplifier circuit includes: a first-stage op-amp amplifier circuit and a second-stage op-amp amplifier circuit sequentially connected in series.

Wherein, the AB poles of the two buses are connected to a motor driver as a driving element, and the AB pole driving circuit is shown in FIG. 2 .

By controlling the ENABLE pin of the motor driver, the OUT+ and OUT- output pins of the AB pole are switched and controlled; by controlling the PHASE pin of the motor driver, the direction of the current passing through the H-bridge of the motor driver is controlled to achieve high and low levels of AB switch.

Wherein, the resistor voltage divider circuit includes two voltage divider resistors, and by adjusting the ratio of the resistance values of the two voltage divider resistors, the sampling voltage of the AB pole is within the sampling range.

Wherein, the one-stage op-amp amplifier circuit adopts a non-directional proportional amplifier circuit, including an operational amplifier and two op-amp resistors, and the output terminal of the operational amplifier is connected to the second-stage op-amp amplifier circuit through one of the op-amp resistors, One of the op-amp pins of the input end of the operational amplifier is connected to one of the voltage-dividing resistors of the resistor divider circuit, and the other op-amp pin of the input end of the operational amplifier is connected to another op-amp resistor; The ratio of the resistance value of the discharge resistor is used to obtain the amplification factor of the operational amplifier, and the sampling voltage after amplifying the voltage from microvolts to millivolts reaches the sampling range.

Wherein, the structure of the two-stage operational amplifier amplifier circuit is the same as that of the first-stage operational amplifier amplifier circuit, and the output voltage of the first-stage operational amplifier amplifier circuit is used as the input voltage of the second-stage operational amplifier amplifier circuit. The operational amplifier of the amplifying circuit is amplified to obtain the amplified sampling voltage.

Wherein, the operational amplifiers of the second-stage operational amplifier circuit and the first-stage operational amplifier circuit have different amplification factors.

Wherein, the resistance voltage division multiple of the resistance voltage divider circuit: β1=12; the primary amplification multiple of the primary op-amp amplifier circuit: β2=7.8; the secondary amplification multiple of the secondary operational amplifier amplifier circuit: β3=31.

Wherein, the multi-stage op-amp amplifier circuit includes: a first-stage op-amp amplifier circuit and a second-stage op-amp amplifier circuit connected in series in sequence, the first-stage op-amp amplifier circuit is connected in series with the resistor divider circuit, and the through The single-chip microcomputer combines the resistance divider circuit and the multi-stage op-amp amplifier circuit to sample the voltage values on the two buses, and obtain the voltage difference through calculation to obtain the voltage situation on the AB pole. When detecting the current, by detecting the low voltage The voltage value on the flat bus, the steps to obtain the corresponding current situation through calculation include:

When the single-chip microcomputer receives the command to obtain the current, the single-chip microcomputer judges the level of the AB pole according to the current power-on state, and determines the low-level bus;

Obtain the sampling voltage of the second-stage op-amp amplifier circuit on the low-level bus;

Judging whether the sampling voltage of the two-stage op-amp amplifier circuit reaches the full-scale condition;

If so, then obtain the sampling voltage of the first-level operational amplifier circuit, and judge whether the sampling voltage of the first-level operational amplifier circuit reaches the full-scale condition;

If so, then obtain the sampling voltage of the resistance voltage divider circuit;

Calculate the voltage parameter according to the sampling voltage of the resistance voltage divider circuit;

The current value is calculated according to the voltage parameter.

Wherein, the voltage values on the two buses are sampled by the single-chip microcomputer combined with the resistance voltage divider circuit and the multi-stage op-amp amplifier circuit, and the voltage difference is obtained through calculation to obtain the voltage situation on the AB pole, when the current is detected , by detecting the voltage value on the low-level bus, the step of obtaining the corresponding current situation through calculation also includes:

When the single-chip microcomputer receives the acquisition voltage command, the sampling voltage of the resistance voltage divider circuit on the AB pole is obtained by the single-chip microcomputer, and the sampling voltage value of the AB pole is obtained;

By judging the sampled voltage value of the AB pole, the voltage difference between the two is calculated, and the voltage on the AB pole is obtained by combining the calculated voltage difference.

Wherein, after the single-chip microcomputer receives the control bus voltage command, before the step of making the AB pole bus in the power-on state through the motor driver, it also includes:

Connect the detonation card to an external serial port device, connect it to the computer, open the serial port debugging tool on the computer, select the port number and serial port baud rate, and ensure that the communication is normal.

Wherein, after the single-chip microcomputer receives the control bus voltage command, the step of making the AB pole bus in the power-on state through the motor driver includes:

After the MCU receives the control bus voltage command, it switches and controls the OUT+ and OUT- output pins of the AB pole by controlling the ENABLE pin of the motor driver, so that the AB pole bus is in a power-on state; by controlling the PHASE pin of the motor driver , to control the direction of the current passing through the H-bridge of the motor driver to realize the switching of AB extremely high and low level.

Wherein, the method also includes:

View the returned data packet in the receiving box on the serial port debugging tool, convert the intercepted data content through the IEEE754 binary floating-point number arithmetic standard to obtain the real result.

Wherein, the resistance voltage divider circuit includes two voltage divider resistors, and the method also includes:

By adjusting the ratio of the resistance values of the two voltage divider resistors, the sampling voltage of the AB pole is within the sampling range.

Wherein, the one-stage operational amplifier amplifier circuit adopts a proportional amplifier circuit in the same direction, and the method also includes:

By adjusting the resistance ratio of the two op-amp resistors in the first-stage op-amp amplifier circuit, the amplification factor of the op-amp is obtained, and the sampling voltage after amplifying the voltage from microvolts to millivolts reaches the sampling range.

The scheme of the present invention is described in detail below:

In order to solve the safety problem of the use of electronic detonators, the present invention designs a reliable and efficient current and voltage detection circuit for two-bus two-resistance circuits. The voltage data is amplified hierarchically, and the sampling voltage is collected and calculated by the ADC of the single-chip microcomputer to obtain the current and voltage data on the AB pole bus.

Specifically, the current and voltage detection circuit is mainly a hardware amplification part and a software sampling analysis part.

Hardware amplification part: use a layer of resistor divider circuit and a second layer of op amp amplifier circuit in series, sample the current and voltage of the sampling resistor on the AB pole, divide the voltage under the condition of large voltage, and perform the voltage division under the condition of small voltage Amplify so that its sampling voltage is within the sampling range of the microcontroller. In terms of current detection, it can accurately sample the current value in a wide range of 1uA-600mA.

Software sampling and analysis part: the current and voltage will enter the sampling circuit after passing through the sampling resistor. When detecting the voltage, the voltage value of the AB pole is opposite at the same time. When A is extremely high (the voltage of the power supply), B is extremely low level (0V). The voltage values on the two buses are sampled by the microcontroller, and the voltage difference is obtained by calculation to obtain the voltage on the AB pole. When detecting the current, by detecting the voltage on the low-level bus The voltage value is calculated to obtain the corresponding current situation.

The multi-layer design of the amplifying circuit is designed for the tiny current on the AB pole bus. Usually, a two-stage operational amplifier circuit is used. In the case of microvolt level voltage, the sampling voltage is obtained through the amplification of the operational amplifier, and is sampled and calculated by the single-chip ADC. Get the voltage data and judge whether it is close to the full scale; the next level is the first-level amplifier circuit. When the sampling result of the second-level amplifier circuit is close to the full-scale range, the first-level amplifier circuit is used. This layer of sampling circuit can amplify the voltage at the millivolt level to sample range, and more accurate results can be obtained through ADC sampling; the next stage is a resistor divider circuit. When the sampling voltage is large, after resistor divider, the single-chip ADC samples the sampled voltage value after the voltage divider, and performs sampling on the sampled value. Calculate the corresponding voltage value.

In the functional block diagram shown in Figure 2 and Figure 3, the main functions of each part are briefly described:

AB pole drive circuit:

1) Use DRV8801PWPR motor driver (U2) as the driving element of AB pole;

2) According to the ENABLE pin of U2 in the principle block diagram 2, control this pin to realize the switch control of the OUT+ and OUT- output pins;

3) By controlling the PHASE pin of the driver, the direction of the current passing through the H bridge of the driver is controlled to realize the switching of AB extremely high and low level.

Two bus AB poles and sampling resistors:

1) The second bus, AB, and the detonating card are the bus for power supply and communication of the electronic detonator;

2) Sampling resistors (R14, R15) are sampling points for obtaining voltage and current on the bus;

The specific calculation formula is as follows:

Voltage coefficient:

3.3 (LDO voltage)/4096 (ADC acquisition accuracy) * 12 (resistor voltage divider multiple);

Current coefficient:

3.3 (LDO voltage)/4096 (ADC acquisition accuracy)/7.8 (magnification of the operational amplifier)/10 (sampling resistor resistance)*1000000 (ampere to microampere);

The principle of AB pole test is as follows:

As shown in Figure 3 and Figure 5, take the A-pole test as an example (the B-pole test can refer to 4 and Figure 6).

1) A three-layer sampling circuit connected in series, including a resistor divider circuit (R25, R31), a primary operational amplifier circuit (U3, R28, R32), and a secondary operational amplifier circuit (U4, R30, R33);

2) The resistance voltage divider circuit is composed of R25 and R31, A is the input voltage, R25 will divide the larger voltage, and the output voltage is the voltage of R31 in the series circuit. By adjusting the ratio of the resistance of the two resistors, let it sample the voltage ( TP14) within the sampling range;

3) The first-level op amp amplifier circuit adopts the same direction proportional amplifier circuit. According to the characteristics of virtual short and virtual break of the operational amplifier, the voltage on pin 3 and pin 4 of the op amp is the same, and the voltage of pin 3 is the input voltage. R28 and The current of R32 is the same. According to this characteristic, adjust the resistance ratio of R28 and R32 resistors to obtain the amplification factor of the op amp, which can amplify the sampling voltage (TP15) from microvolts to millivolts to reach the sampling range;

4) The principle of the two-stage op-amp amplifier circuit is the same, the output voltage of the first-stage op-amp amplifier circuit is used as the input voltage of the second-stage op-amp amplifier circuit, and then amplified by the amplifier to obtain the amplified sampling voltage (TP16);

5) The two-stage amplifier sets different magnifications to ensure the range;

Resistor voltage divider multiple: β1=(R25+R31)/R31=12;

Primary magnification: β2=(R28+R32)/R32=7.8;

Secondary magnification: β3=(R30+R33)/R33=31.

Brief description of the realization process of the present invention:

As shown in Figure 5 and Figure 6, the current and voltage detection methods of the detonation card include:

Step 1: Connect the detonation card to an external serial port device, connect it to the computer, open the serial port debugging tool on the computer, select the port number and serial port baud rate, and ensure the normal communication;

Step 2: Send the "control bus voltage" command on the serial port debugging tool, and the single-chip microcomputer receives the command and controls the ENABLE pin of U2 in the schematic diagram 1, so that OUT+ and OUT- are powered on, and the AB pole bus is in the power-on state;

Step 3: Send the "get current" command on the serial port debugging tool, the single-chip microcomputer obtains the sampling value of the second-level operational amplifier (TP16), and judges whether the result is full-scale, and if it is close to full-scale, obtains the sampling value of the first-level operational amplifier (TP15 ), if it is still close to the full scale, obtain the sampled value (TP14) at the resistor divider, and finally calculate the current value by combining the calculated voltage parameters;

Step 4: Send the "get voltage" command on the serial port debugging tool, and the single-chip microcomputer respectively obtains the sampled value of the resistance voltage divider (TP14) on the AB pole, and calculates the difference between the two by judging the size of the sampled value of the AB pole, and combines The calculated voltage parameter calculates the voltage value;

Step 5: View the returned data packet in the receiving box on the serial port debugging tool, intercept the data content and convert it through the IEEE754 binary floating-point arithmetic standard to obtain the real result.

Technical effects of the present invention: the scheme designs a reliable and efficient current and voltage detection circuit for two-bus dual-resistor circuits. Hierarchical amplification, the sampling voltage is collected by the ADC of the single-chip microcomputer and the current and voltage data on the AB pole bus are obtained through calculation, which solves the safety problem of the use of electronic detonators and improves the accuracy of current and voltage detection of electronic detonators.

The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process conversion made by using the description of the present invention and the contents of the accompanying drawings, or directly or indirectly used in other related technical fields , are all included in the scope of patent protection of the present invention in the same way.

Claims (10)

1. The method is characterized by being applied to a current-voltage detection circuit, and the current-voltage detection circuit comprises the following steps: the resistance voltage dividing circuit is connected with the sampling resistor in series, the multistage operational amplifier circuit and the singlechip are connected with the series circuit, and the method comprises the following steps:

after the singlechip receives a command for controlling the bus voltage, the AB pole bus is in an electrified state through a motor driver;

the voltage values on the two buses are sampled through a singlechip and combined with a resistor voltage dividing circuit and a multistage operational amplifier circuit, the voltage difference is obtained through calculation, the voltage condition on the AB is obtained, and when the current is detected, the corresponding current condition is obtained through calculation by detecting the voltage value on the low-level bus.

2. The current-voltage detection method according to claim 1, wherein the multi-stage operational amplifier circuit includes: the circuit comprises a first-stage operational amplifier circuit and a second-stage operational amplifier circuit which are sequentially connected in series, wherein the first-stage operational amplifier circuit is connected with the resistor divider circuit in series, voltage values on two buses are sampled through a singlechip and combined with the resistor divider circuit and the multi-stage operational amplifier circuit, voltage difference is obtained through calculation, the voltage condition on an AB pole is obtained, and when current is detected, the voltage value on a low-level bus is detected, and the corresponding current condition is obtained through calculation, wherein the steps of:

when the singlechip receives a current acquisition instruction, judging the level of the AB pole according to the current power-on state by the singlechip, and determining a low-level bus;

acquiring sampling voltage of a secondary operational amplifier circuit on a low-level bus;

judging whether the sampling voltage of the secondary operational amplifier circuit reaches a full-scale condition or not;

if yes, acquiring the sampling voltage of the primary operational amplifier circuit, and judging whether the sampling voltage of the primary operational amplifier circuit reaches a full-scale condition;

if yes, acquiring the sampling voltage of the resistor divider circuit;

calculating according to the sampling voltage of the resistor voltage dividing circuit to obtain a voltage parameter;

and calculating a current value according to the voltage parameter.

3. The method for detecting current and voltage according to claim 2, wherein the step of obtaining the corresponding current situation by calculating the voltage value on the low-level bus while detecting the current by sampling the voltage values on the two buses and obtaining the voltage difference by calculating through the single chip microcomputer and combining the resistor divider circuit and the multi-stage operational amplifier circuit comprises the steps of:

when the singlechip receives a voltage acquisition instruction, acquiring a sampling voltage of the resistor voltage dividing circuit on the AB through the singlechip to obtain an AB pole sampling voltage value;

and (3) judging the magnitude of the AB pole sampling voltage value, calculating to obtain a voltage difference value of the AB pole sampling voltage value and the AB pole sampling voltage value, and combining the calculated voltage difference value to obtain the voltage condition of the AB pole.

4. The method for detecting current and voltage according to claim 2, wherein after the singlechip receives the command for controlling the bus voltage, the step of powering on the AB pole bus through the motor driver further comprises:

and connecting the detonation card with serial port equipment externally, connecting the detonation card with a computer end, opening a serial port debugging tool on the computer, and selecting port numbers and serial port baud rates to ensure normal communication.

5. The method for detecting current and voltage according to claim 4, wherein the step of powering on the AB pole bus through the motor driver after the singlechip receives the command for controlling the bus voltage comprises:

after receiving a bus voltage control instruction, the singlechip controls the switch of the OUT+ and OUT-output pins of the AB pole through the ENABLE pin of the control motor driver, so that the AB pole bus is in an electrified state; the direction of current passing through the H bridge of the motor driver is controlled by controlling the PHASE pin of the motor driver, so that the switching of the AB extremely high and low level is realized.

6. The current-voltage detection method according to claim 4, characterized in that the method further comprises:

and checking a return data packet in a receiving frame on the serial port debugging tool, and converting intercepted data content through an IEEE754 binary floating point number arithmetic standard to obtain a real result.

7. The current-voltage detection method according to any one of claims 2 to 6, wherein the resistive voltage dividing circuit includes two voltage dividing resistors, the method further comprising:

the sampling voltage of the AB pole is in the sampling range by adjusting the ratio of the resistance values of the two voltage dividing resistors.

8. The method of claim 7, wherein the first-stage op-amp circuit is a co-proportioned amplifier circuit, the method further comprising:

and the amplification factor of the operational amplifier is obtained by adjusting the resistance ratio of two operational amplifier resistors in the primary operational amplifier circuit, and the sampling voltage obtained after the voltage of microvolts to millivolts is amplified reaches the sampling range.

9. The method for detecting a current and a voltage according to claim 8, wherein,

the AB pole bus is a bus for supplying power and communicating for the electronic detonator by the detonation card, and the operational amplifier of the secondary operational amplifier amplifying circuit and the operational amplifier of the primary operational amplifier amplifying circuit are provided with different amplification factors.

10. The method of claim 9, wherein the resistor divider circuit has a multiple of the resistor divider voltage: β1=12; first-stage amplification factor of first-stage operational amplifier circuit: β2=7.8; second-stage amplification factor of the second-stage operational amplifier circuit: β3=31.

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