Integrated rapid correction device for formation and capacity grading equipment

Abstract

An integrated rapid correction device for formation and capacity grading equipment comprises an upper computer which is connected with a switch through the Ethernet. The switch is in signal connection with a to-be-calibrated device and a plurality of independent working devices; the calibration unit is connected with the equipment to be calibrated through a voltage and current line and a wireless signal to achieve an equipment calibration effect; the calibration unit comprises a calibration main processor, an FPGA (Field Programmable Gate Array) coprocessor, a signal relay plate, a universal meter and a voltage and current connecting plate, and works through an external power supply; the test port of the universal meter is electrically connected with the calibration port of the to-be-calibrated device. The calibration main processor comprises a precision calibration circuit for adjusting measurement and output precision, a line sequence calibration circuit for ensuring signal synchronism and time sequence, and a coaxiality calibration circuit for ensuring coaxial cable signal accuracy; according to the utility model, the precision calibration circuit and the coaxiality calibration circuit are greatly improved on the basis of the utility model with the publication number of 115166614A, and the sensitivity of detecting the contact state of the probe, the accuracy of precision calibration and the energy utilization efficiency are improved.

Description

Technical Field

[0001] The invention belongs to the field of battery formation and capacity division, and in particular relates to an integrated rapid correction device for formation and capacity division equipment. Background Art

[0002] In order to ensure the working accuracy of battery testing equipment such as formation and capacity division, it is necessary to have accurate calibration and measurement tools to calibrate them regularly. Different components are calibrated through different calibration units, including calibration units, line sequence tools, coaxiality detection tools, change tools, negative pressure tools, etc. The patent with publication number 115166614A discloses a three-in-one fast calibration device for formation and capacity division equipment to overcome the time-consuming and labor-intensive recalibration and measurement process during manual calibration, aiming to integrate the precision calibration circuit for adjusting the measurement and output accuracy, the line sequence calibration circuit for ensuring signal synchronization and timing, and the coaxiality calibration circuit for ensuring the accuracy of the coaxial cable signal to automatically calibrate the electrical channel of the calibration equipment. The precision calibration circuit of the original invention uses multiple relays, which need to be switched back and forth during the calibration process. The loop switching relay requires a large overcurrent capacity, resulting in a huge calibration unit, high difficulty and cost, slow operation during switching, and low efficiency. At the same time, the life of the high-power relay limits the need to replace the relay board regularly. At the same time, because the original invention requires an independent power supply during constant current discharge calibration, when the discharge current calibration requirement is large, the volume of its power supply also increases. The constant current charging of the original invention cannot set the output voltage, which is quite different from the actual working condition of the battery, and the shunt consumes energy, which is not conducive to energy saving. The coaxiality detection circuit of the original invention has low sensitivity to poor contact, and cannot specifically distinguish the problem when multiple probes have poor contact. Summary of the invention

[0003] In view of the above problems, the present invention proposes an integrated rapid correction device for formation and capacity separation equipment, which improves the device power supply mode, precision calibration circuit and coaxiality calibration circuit.

[0004] The existing calibration mode circuit used for the integrated rapid correction device of formation and capacitance separation equipment includes a host computer, which is connected to a switch via Ethernet; the switch is provided with several device connection ports, and connects a device to be calibrated and several independent working devices via the data line signal of the device connection port; the device to be calibrated is connected to a calibration unit for device calibration via voltage and current lines and wireless signals; the calibration unit contains a calibration main processor, which receives the wireless signal of the device to be calibrated and is electrically connected to the control end of a multimeter via an Ethernet interface; the calibration main processor includes an accuracy calibration circuit for adjusting the measurement and output accuracy, a line sequence calibration circuit for ensuring signal synchronization and timing, and a coaxiality calibration circuit for ensuring the accuracy of the coaxial cable signal. The test port of the multimeter is connected to the device to be calibrated via voltage lines and current lines;

[0005] The signal processing port of the calibration main processor of the present invention is connected to an FPGA coprocessor through a parallel bus, the IO signal output end of the FPGA coprocessor is connected to a signal relay board, the signal relay board is connected to a voltage and current connection board, and the voltage and current connection board is connected to the voltage line and current line of the device to be calibrated; the calibration unit is powered by an external power supply.

[0006] The calibration unit of the present invention applies the existing line sequence calibration circuit and improves the precision calibration circuit and the coaxiality calibration circuit. The existing line sequence calibration circuit includes two groups of line sequence detection circuits for connecting test channels; each set of the line sequence detection circuits corresponds to a set of test channels, and the test channels are respectively the first test channel and the second test channel; the first test channel and the second test channel are both provided with four voltage connection ports, namely the first voltage positive and negative terminals and the second voltage positive and negative terminals; each set of line sequence detection circuits includes two first resistors, one second resistor, one third resistor, two fourth resistors, a first comparator and a second comparator; the voltage input positive terminal of the first comparator is divided into two paths, one of which is connected in series with the first resistor to form a first voltage wiring node, and the other is connected in series with the fourth resistor and then grounded; the voltage input negative terminal of the first comparator is divided into two paths, one of which is connected in series with the third resistor to form a second voltage wiring node, and the other is connected in series with the fourth resistor and then connected to the excitation voltage output terminal of the first comparator; the voltage input positive terminal of the second comparator is divided into two paths, one of which is connected in series with the first resistor to form a third voltage wiring node, and the other is connected in series with the fourth resistor and then grounded; the voltage input negative terminal of the second comparator is divided into two paths, one of which is connected in series with the second resistor to form a fourth voltage wiring node, and the other is connected in series with the fourth resistor and then connected to the excitation voltage output terminal of the second comparator;

[0007] The connection nodes of the two groups of line sequence detection circuits are mixed, wherein:

[0008] In the first group of line sequence detection circuits: the first voltage wiring node is electrically connected to the first voltage positive end of the second test channel, the second voltage wiring node is electrically connected to the first voltage negative end of the first test channel; the third voltage wiring node is electrically connected to the second voltage positive end of the second test channel; the fourth voltage wiring node is electrically connected to the second voltage negative end of the first test channel;

[0009] In the line sequence detection circuit of the second group: the first voltage wiring node is electrically connected to the first voltage positive end of the first test channel, the second voltage wiring node is electrically connected to the first voltage negative end of the second test channel; the third voltage wiring node is electrically connected to the second voltage positive end of the first test channel; the fourth voltage wiring node is electrically connected to the second voltage negative end of the second test channel; the first voltage wiring node is electrically connected to the fourth voltage wiring node.

[0010] The improved precision calibration circuit of the present invention comprises a first calibration channel and a second calibration channel which are connected to the device to be calibrated and equally divide the number of cable channels of the device to be calibrated, and the precision calibration can be completed by mutual charging and discharging of the channels; the first calibration channel and the second calibration channel are respectively provided with a plurality of negative current contacts, negative voltage contacts, positive voltage contacts and positive current contacts of the probes contacting the device to be calibrated; the negative current contacts are directly connected to each other; the negative current contacts are connected to their corresponding positive current contacts through negative relays, load resistors and positive relays in sequence; the positive current contacts are divided into two groups, one of which is directly connected to each other, and the other is also directly connected to each other, and the two groups of positive current contacts are respectively connected in series to the same shunt through fuses; the negative voltage contacts and the positive voltage contacts are respectively connected to the load resistor through the corresponding negative relays and positive relays; the positive relays and the negative relays are both controlled by a signal relay board; the shunt and the load resistor are both connected to a multimeter to reflect the voltage and current;

[0011] When working, the precision calibration circuit can use three modes: constant current charging, constant current discharging, and constant voltage charging and discharging;

[0012] If it is a constant current charging mode, the electrical connection formed between the two sets of positive current contacts and their corresponding negative current contacts is used as a charging and discharging circuit to connect the first calibration channel and the second calibration channel; the second calibration channel is used as a load circuit for charging the first calibration channel, discharges to the first calibration channel, and the discharge current is set to be greater than the maximum current generated during the charging calibration of the first calibration channel. The first calibration channel starts constant current charging according to the current to be calibrated. After stabilization, the multimeter reads the actual current value, completing a stage of charging current calibration;

[0013] If it is a constant current discharge mode, the current connection formed between the two sets of positive current contacts and their corresponding negative current contacts is used as a charge and discharge circuit to connect the first calibration channel and the second calibration channel. The second calibration channel is charged through the charge and discharge circuit, and the electric energy generated by the charging is used to discharge the first calibration channel. The charging current of the second calibration channel is set to be greater than the maximum current generated during the charging calibration of the first calibration channel. The first calibration channel starts to perform constant current discharge according to the current to be calibrated; after stabilization, the multimeter reads the actual current value, and a stage of discharge current calibration is completed;

[0014] If it is a constant voltage charge and discharge mode, all positive relays and negative relays are initially in the disconnected state; when calibrating the first calibration channel, the positive relay and its corresponding negative relay are closed, and form a constant voltage calibration loop with the load resistor. After the first calibration channel starts the constant voltage charge and discharge calibration, the voltage reading across the load resistor measured by the multimeter is read, completing a stage of voltage calibration.

[0015] More specifically, the improved coaxiality calibration circuit of the present invention includes a plurality of coaxiality detection circuits corresponding one by one to the probes of the device to be calibrated, the coaxiality detection circuit includes a test resistor and a tilt detection ring for checking the tilt of the current and voltage probes, the tilt detection ring is coaxially arranged at the detection probe, and includes an outer ring and an inner ring, the outer ring is coaxially sleeved outside the inner ring, and a uniform annular gap is left between the inner ring and the outer ring; a spring that can be extended and retracted up and down is provided under the outer ring, so that the outer ring is higher than the inner ring in the initial state; the inner ring of the tilt detection ring is connected to the negative pole of the same driving power supply, and the inner ring is connected to the negative pole of the inner ring. A detection probe contact point is provided on the surface for contacting and connecting with the detection probe; the outer rings of the tilt detection ring are respectively connected to a coaxial relay that can be turned on and off, and the coaxial relays are connected to the same test resistor; the test resistor is connected to the positive pole of the driving power supply, and the wire has a detection end as a positive pole detection point; if the current and voltage probes are offset and contact the outer ring first and then the inner ring, the outer ring can detect the excitation voltage; the coaxial relays are initially in a disconnected state, and when a specific probe contact state is detected, the relay of the corresponding coaxiality detection circuit can be closed, and the voltage value of the positive pole monitoring point is collected to determine whether the probe is offset.

[0016] The calibration mode of the calibration tool of the present invention is that the upper computer sends calibration parameters (channel number, voltage, current, charging and discharging, gear parameters, delayed shutdown parameters, etc.) all parameters to the lower computer, and the lower computer sends the channel and selection instructions to the calibration tool. After starting the calibration measurement, the lower computer reads the measured value Vh (unit V) of the multimeter, and the lower computer calculates the Ks, Bs, Kr, and Br values ​​according to the Vs, Vr, and Vh values, and directly records the calibration value. After the upper computer sends the parameters, it does not participate in the subsequent calibration measurement, but only displays the data prompt.

[0017] The beneficial effects of the present invention are:

[0018] 1) The calibration unit of the present invention is directly connected to an external power supply through a voltage and current connection board, eliminating the design of an internal independent power supply, which facilitates the miniaturization and large-scale application of the equipment.

[0019] 2) The precision calibration circuit of the present invention abandons the design of power relays and directly divides the electrical channel of the device to be calibrated into two equal parts. The charging calibration of the precision calibration circuit of the original invention relies on short-circuit charging, and the output voltage is small and cannot be specified. The present invention completes the calibration through mutual charging and discharging between channels, so that the charging and discharging current is only limited by the current carrying capacity of the cable, which greatly simplifies the charging and discharging circuit and reduces the size of the calibration unit.

[0020] 3) The constant current charging mode of the precision calibration circuit of the present invention absorbs energy by discharging the corresponding channels, thereby improving calibration energy recovery and avoiding energy waste, while at the same time being able to specify the high or low charging output voltage; the energy of the constant current discharge mode of the precision calibration circuit is provided by charging the corresponding channels, and there is no need to install an additional discharge power supply in the calibration unit.

[0021] 4) The precision calibration circuit of the present invention can realize multi-channel parallel calibration, and the calibration speed is greatly improved.

[0022] 5) The coaxiality calibration circuit includes an outer ring with a telescopic spring mounted on a coaxial inner ring, and independent relays corresponding to the detection probes one by one, which improves the sensitivity of the detection probe offset and can quickly distinguish the specific location of the probe with poor contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a block diagram of the integrated rapid correction device for formation and volume separation equipment;

[0024] Figure 2 is a structural diagram of the precision calibration circuit of the present invention;

[0025] Figure 3 is a structural diagram of an existing line sequence calibration circuit applied by the present invention;

[0026] Figure 4 is a structural diagram of a coaxiality calibration circuit of the present invention;

[0027] Figure 5 : is a top view of the coaxiality calibration circuit of the present invention DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings.

[0029] The invention discloses a three-in-one rapid calibration device for formation and volume separation equipment.

[0030] The existing calibration mode circuit for the application of the integrated rapid correction device for formation and capacity division equipment includes a host computer 1, which is connected to a switch 2 via Ethernet; the switch 2 is provided with several device connection ports, and connects a device to be calibrated 4 and several independent working devices 5 via the data line signal of the device connection port; the device to be calibrated 4 is connected to the calibration unit 3 for device calibration through the voltage and current lines and the wireless signal; the calibration unit 3 contains a calibration main processor 31, which receives the wireless signal of the device to be calibrated and is electrically connected to the control end of a multimeter 35 via the Ethernet interface; the calibration main processor 31 includes an accuracy calibration circuit for adjusting the measurement and output accuracy, a line sequence calibration circuit for ensuring the synchronization and timing of the signal, and a coaxiality calibration circuit for ensuring the accuracy of the coaxial cable signal. The test port of the multimeter is connected to the device to be calibrated 4 via the voltage line and the current line;

[0031] The signal processing port of the calibration main processor 31 of the present invention is connected to an FPGA coprocessor 32 through a parallel bus, the IO signal output end of the FPGA coprocessor 32 is connected to a signal relay board 33, the signal relay board 33 is connected to a voltage and current connection board 36, and the voltage and current connection board 36 is connected to the voltage line and current line of the device to be calibrated; the calibration unit is powered by an external power supply.

[0032] The calibration unit of the present invention applies the existing line sequence calibration circuit, and improves the accuracy calibration circuit and the coaxiality calibration circuit. The existing line sequence calibration circuit includes two groups of line sequence detection circuits for connecting test channels, namely, the first group of line sequence detection circuits A and the second group of line sequence detection circuits B; each set of the line sequence detection circuits corresponds to a set of test channels 6, and the test channels are respectively the first test channel 6A and the second test channel 6B, and the first test channel 6A and the second test channel 6B are provided with four voltage connection ports, namely, the first voltage positive and negative terminals (VB+, VB-) and the second voltage positive and negative terminals (VI+, VI-); each group of line sequence detection circuits includes two first resistors R1, one second resistor R2, one third resistor R3, two fourth resistors R4, a first comparator 321 and a second comparator 322; the voltage input positive terminal of the first comparator 321 is divided into two paths, one of which is connected in series with the first resistor R1 to form a first voltage wiring node a, and the other is connected in series with the fourth The voltage input negative terminal of the first comparator 321 is divided into two paths, one of which is connected in series with the third resistor R3 to form a second voltage wiring node b, and the other is connected in series with the fourth resistor R4 to the excitation voltage output terminal of the first comparator 321, wherein the voltages output by the two groups of excitation voltage output terminals of the first comparators are VB1 and VB2; the voltage input positive terminal of the second comparator 322 is divided into two paths, one of which is connected in series with the first resistor R1 to form a third voltage wiring node c, and the other is connected in series with the fourth resistor R4 to ground; the voltage input negative terminal of the second comparator 322 is divided into two paths, one of which is connected in series with the second resistor R2 to form a fourth voltage wiring node d, and the other is connected in series with the fourth resistor R4 to the excitation voltage output terminal of the second comparator 322, wherein the voltages output by the two groups of excitation voltage output terminals of the second comparators are VI1 and VI2;

[0033] The connection nodes of the two groups of line sequence detection circuits are mixed, wherein:

[0034] In the first group of line sequence detection circuits: the first voltage wiring node is electrically connected to the first voltage positive end of the second test channel, the second voltage wiring node is electrically connected to the first voltage negative end of the first test channel; the third voltage wiring node is electrically connected to the second voltage positive end of the second test channel; the fourth voltage wiring node is electrically connected to the second voltage negative end of the first test channel;

[0035] In the line sequence detection circuit of the second group: the first voltage wiring node is electrically connected to the first voltage positive end of the first test channel, the second voltage wiring node is electrically connected to the first voltage negative end of the second test channel; the third voltage wiring node is electrically connected to the second voltage positive end of the first test channel; the fourth voltage wiring node is electrically connected to the second voltage negative end of the second test channel; the first voltage wiring node is electrically connected to the fourth voltage wiring node. The line sequence detection is that the lower computer gives an excitation voltage to the line sequence calibration circuit, and gives excitation voltages to the current line and the voltage line separately. The lower computer samples an excitation voltage within a reasonable range, indicating that the current line or voltage line sequence is correct. The line sequence error types include (current line, voltage line reverse connection, current line mixed connection, voltage line mixed connection, current line, voltage line not connected). If the line sequence is wrong, the excitation voltage sampled by the lower computer is not within the range.

[0036] The improved precision calibration circuit of the present invention comprises a first calibration channel and a second calibration channel which are connected to the device to be calibrated and equally divide the number of cable channels of the device to be calibrated, and the precision calibration can be completed by mutual charging and discharging of the channels; the first calibration channel and the second calibration channel are respectively provided with a plurality of negative current contacts 311, negative voltage contacts 312, positive voltage contacts 314 and positive current contacts 315 of the probes contacting the device to be calibrated; the negative current contacts 311 are directly connected to each other; the negative current contacts are sequentially connected to the positive relay 319 through the negative relay 313, the load resistor 316 and the positive relay 319 The positive current contacts 315 are connected to the corresponding positive current contacts 315; the positive current contacts are divided into two groups, one of which is directly connected to each other, and the other is also directly connected to each other, and the two groups of positive current contacts are respectively connected in series to the same shunt 318 through fuses 317; the negative voltage contact 314 and the positive voltage contact 315 are respectively connected to the load resistor 316 through the corresponding negative relay 313 and positive relay 319; the positive relay and the negative relay are both controlled by the signal relay board 33; the shunt 318 and the load resistor 316 are both connected to a multimeter to reflect the voltage and current;

[0037] When working, the precision calibration circuit can use three modes: constant current charging, constant current discharging, and constant voltage charging and discharging;

[0038] If it is a constant current charging mode, the electrical connection formed between two sets of positive current contacts, I16+ and I1+, and their corresponding negative current contacts I16- and I1- is used as a charging and discharging circuit to connect the first calibration channel and the second calibration channel; the working steps include:

[0039] 1. The second calibration channel serves as the load circuit for charging the first calibration channel, discharges to the first calibration channel, and sets the discharge current to be greater than the maximum current generated during the charging calibration of the first calibration channel;

[0040] 2. The first calibration channel starts constant current charging according to the current to be calibrated;

[0041] 3. After stabilization, use the multimeter to read the actual current value, completing one stage of charging current calibration;

[0042] If it is a constant current discharge mode, two sets of positive current contacts, I16+ and I1+, and the current connection formed between their corresponding negative current contacts I16- and I1- are used as a charge and discharge circuit to connect the first calibration channel and the second calibration channel. The second calibration channel is charged through the charge and discharge circuit, and the electric energy generated by the charging is used to discharge the first calibration channel. The working steps include:

[0043] 1. The charging current of the second calibration channel is set to be greater than the maximum current generated during the charging calibration of the first calibration channel;

[0044] 2. The first calibration channel starts constant current discharge according to the current to be calibrated;

[0045] 3. After stabilization, the multimeter reads the actual current value to complete a stage of discharge current calibration;

[0046] If it is a constant voltage charge and discharge mode, all positive relays and negative relays are initially disconnected; the working steps include:

[0047] 1. When calibrating the first calibration channel, the positive relay K1-2 and its corresponding negative relay K1-1 are closed, and form a constant voltage calibration loop with the load resistor 316;

[0048] 2. After starting the constant voltage charge and discharge calibration for the first channel, read the voltage readings across the load resistor measured by the multimeter to complete one stage of voltage calibration.

[0049] The improved coaxiality calibration circuit of the present invention comprises a plurality of coaxiality detection circuits corresponding one by one to the probes of the device to be calibrated, the coaxiality detection circuit comprises a test resistor 335 and a tilt detection ring for checking the tilt of the current and voltage probes, the tilt detection ring is coaxially arranged at the detection probe 331, comprises an outer ring 332 and an inner ring 333, the outer ring 332 is coaxially sleeved outside the inner ring 333, and a uniform annular gap is left between the inner ring 333 and the outer ring 332; a spring 337 which can be extended and retracted up and down is arranged under the outer ring, so that the outer ring is higher than the inner ring in the initial state; the inner ring of the tilt detection ring is connected to the negative pole of the same driving power supply 336, and the inner ring is connected to the negative pole of the inner ring A detection probe contact point 334 is provided on the surface for contacting and connecting with the detection probe 331; the outer ring of the tilt detection ring is respectively connected to a coaxial relay 334 that can be turned on and off, and the coaxial relay is connected to the same test resistor 335; the test resistor is connected to the positive pole of the driving power supply 336, and the detection end of the wire is left as the positive pole detection point C; if the current and voltage probes are offset and contact the outer ring first and then the inner ring, the outer ring can detect the excitation voltage; the coaxial relays 334 are initially in the disconnected state. When detecting the contact state of a specific probe, the coaxial relay 334 of the corresponding coaxiality detection circuit can be closed, and the voltage value of the positive pole monitoring point C is collected to determine whether the probe is offset.

[0050] The calibration mode of the calibration tool of the present invention is that the upper computer sends calibration parameters (channel number, voltage, current, charging and discharging, gear parameters, delayed shutdown parameters, etc.) all parameters to the lower computer, and the lower computer sends the channel and selection instructions to the calibration tool. After starting the calibration measurement, the lower computer reads the measured value Vh (unit V) of the multimeter, and the lower computer calculates the Ks, Bs, Kr, and Br values ​​according to the Vs, Vr, and Vh values, and directly records the calibration value. After the upper computer sends the parameters, it does not participate in the subsequent calibration measurement, but only displays the data prompt.

[0051]

[0052] The beneficial effects of the present invention are:

[0053] 1) The calibration unit of the present invention is directly connected to an external power supply through a voltage and current connection board, eliminating the design of an internal independent power supply, which facilitates the miniaturization and large-scale application of the equipment.

[0054] 2) The precision calibration circuit of the present invention abandons the design of power relays and directly divides the electrical channel of the device to be calibrated into two equal parts. The charging calibration of the precision calibration circuit of the original invention relies on short-circuit charging, and the output voltage is small and cannot be specified. The present invention completes the calibration through mutual charging and discharging between channels, so that the charging and discharging current is only limited by the current carrying capacity of the cable, which greatly simplifies the charging and discharging circuit and reduces the size of the calibration unit.

[0055] 3) The constant current charging mode of the precision calibration circuit of the present invention absorbs energy by discharging the corresponding channels, thereby improving calibration energy recovery and avoiding energy waste, while at the same time being able to specify the high or low charging output voltage; the energy of the constant current discharge mode of the precision calibration circuit is provided by charging the corresponding channels, and there is no need to install an additional discharge power supply in the calibration unit.

[0056] 4) The precision calibration circuit of the present invention can realize multi-channel parallel calibration, and the calibration speed is greatly improved.

[0057] 5) The coaxiality calibration circuit includes an outer ring with a telescopic spring mounted on a coaxial inner ring, and independent relays corresponding to the detection probes one by one, which improves the sensitivity of the detection probe offset and can quickly distinguish the specific location of the probe with poor contact.

Claims

1. An integrated rapid calibration device for formation and capacity division equipment, wherein the existing calibration mode circuit used in the device comprises a host computer, the host computer is connected to a switch via Ethernet; the switch is provided with several device connection ports, and a device to be calibrated is connected to several independent working devices via data line signals of the device connection ports; the device to be calibrated is connected to a calibration unit for device calibration via voltage and current lines and wireless signals; the calibration unit comprises a calibration main processor, the calibration main processor receives the wireless signal of the device to be calibrated, and is electrically connected to a control end of a multimeter via an Ethernet interface; the calibration main processor comprises an accuracy calibration circuit for adjusting measurement and output accuracy, a line sequence calibration circuit for ensuring signal synchronization and timing, and a coaxiality calibration circuit for ensuring the accuracy of coaxial cable signals; the test port of the multimeter is connected to the device to be calibrated via voltage lines and current lines; it is characterized in that: The signal processing port of the calibration main processor is connected to an FPGA coprocessor through a parallel bus, the IO signal output end of the FPGA coprocessor is connected to a signal relay board, the signal relay board is connected to a voltage and current connection board, and the voltage and current connection board is connected to the voltage line and current line of the device to be calibrated; the calibration unit is powered by an external power supply; The precision calibration circuit includes a first calibration channel and a second calibration channel which are connected to the device to be calibrated and equally divide the number of cable channels of the device to be calibrated, and the precision calibration can be completed by mutual charging and discharging of the channels; the first calibration channel and the second calibration channel are respectively provided with a plurality of negative current contacts, negative voltage contacts, positive voltage contacts and positive current contacts of the probes contacting the device to be calibrated; the negative current contacts are directly connected to each other; the negative current contacts are connected to their corresponding positive current contacts through negative relays, load resistors and positive relays in sequence; the positive current contacts are divided into two groups, one of which is directly connected to each other, and the other is also directly connected to each other, and the two groups of positive current contacts are respectively connected in series to the same shunt through fuses; the negative voltage contacts and the positive voltage contacts are respectively connected to the load resistor through the corresponding negative relays and positive relays; the positive relays and the negative relays are both controlled by a signal relay board; the shunt and the load resistor are both connected to a multimeter to reflect the voltage and current; The precision calibration circuit can be used in three modes: constant current charging, constant current discharging, and constant voltage charging and discharging; If it is a constant current charging mode, the electrical connection formed between the two sets of positive current contacts and their corresponding negative current contacts is used as a charging and discharging circuit to connect the first calibration channel and the second calibration channel; the second calibration channel is used as a load circuit for charging the first calibration channel, discharges to the first calibration channel, and the discharge current is set to be greater than the maximum current generated during the charging calibration of the first calibration channel. The first calibration channel starts constant current charging according to the current to be calibrated. After stabilization, the multimeter reads the actual current value, completing a stage of charging current calibration; If it is a constant current discharge mode, the current connection formed between the two sets of positive current contacts and their corresponding negative current contacts is used as a charge and discharge circuit to connect the first calibration channel and the second calibration channel. The second calibration channel is charged through the charge and discharge circuit, and the electric energy generated by the charging is used to discharge the first calibration channel. The charging current of the second calibration channel is set to be greater than the maximum current generated during the charging calibration of the first calibration channel. The first calibration channel starts to perform constant current discharge according to the current to be calibrated; after stabilization, the multimeter reads the actual current value, and a stage of discharge current calibration is completed; If it is a constant voltage charge and discharge mode, all positive relays and negative relays are initially in the disconnected state; when calibrating the first calibration channel, the positive relay and its corresponding negative relay are closed, and form a constant voltage calibration loop with the load resistor. After the first calibration channel starts the constant voltage charge and discharge calibration, the voltage reading across the load resistor measured by the multimeter is read, completing a stage of voltage calibration.

2. The integrated rapid correction device for formation and volume separation equipment according to claim 1, characterized in that: The coaxiality calibration circuit includes a plurality of coaxiality detection circuits corresponding to the probes of the device to be calibrated one by one, the coaxiality detection circuit includes a test resistor and a tilt detection ring for checking the tilt of the current and voltage probes, the tilt detection ring is coaxially arranged at the detection probe, and includes an outer ring and an inner ring, the outer ring is coaxially sleeved outside the inner ring, and a uniform annular gap is left between the inner ring and the outer ring; a spring that can be extended and retracted up and down is provided under the outer ring, so that the outer ring is higher than the inner ring in the initial state; the inner ring of the tilt detection ring is connected to the negative pole of the same driving power supply, and a detection The probe contact point is used to contact and connect with the detection probe; the outer ring of the tilt detection ring is respectively connected to a coaxial relay that can be turned on and off, and the coaxial relay is connected to the same test resistor; the test resistor is connected to the positive pole of the driving power supply, and the wire has a detection end as a positive pole detection point; if the current and voltage probes are offset and contact the outer ring first and then the inner ring, the outer ring can detect the excitation voltage; the coaxial relays are initially in the disconnected state. When detecting a specific probe contact state, the coaxial relay of the corresponding coaxiality detection circuit can be closed, and the voltage value of the positive pole monitoring point is collected to determine whether the probe is offset.

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