Multi-channel self-adaptive range current high-speed measurement system

Abstract

The invention discloses a multi-channel self-adaptive range current high-speed measurement system, which comprises a high-power linear power supply module, a data processing module and a current measurement module, the high-power linear power supply module is electrically connected with the data processing module and the current measurement module and supplies power to the data processing module and the current measurement module; the current measurement module is electrically connected with the product to be monitored and receives a current signal of the product to be monitored; the current measuring module is electrically connected with the data processing module and transmits current signals to the data processing module. According to the invention, accurate measurement of large current and micro current can be realized.

Description

Technical Field

[0001] The invention relates to the field of current measurement, in particular to a multi-channel adaptive range current high-speed measurement system. Background Art

[0002] During product development and testing, the detection and analysis of product operating current is crucial because the product is powered by a battery or other DC power source. Due to the use of complex power management mechanisms, products often need to continuously switch between different operating modes, such as from sleep to standby to working state, or from working to standby to sleep state, resulting in a wide range of operating current values. Conventional measurement methods have great limitations for this type of current testing, and can often only guarantee the accuracy of part of the range, while adaptive range measurement technology makes this type of testing possible.

[0003] The prior art requires control circuit switching when performing multi-channel current measurement, and cannot implement the adaptive range function and the target range accuracy control function. Summary of the invention

[0004] The object of the present invention is to provide a multi-channel adaptive range current high-speed measurement system, comprising a high-power linear power supply module, a data processing module, and a current measurement module;

[0005] The high-power linear power supply module is electrically connected to the data processing module and the current measurement module to supply power to the data processing module and the current measurement module;

[0006] The current measurement module is electrically connected to the product to be monitored and receives the current signal of the product to be monitored;

[0007] The current measuring module is electrically connected to the data processing module and transmits the current signal to the data processing module.

[0008] Furthermore, the circuit topology of the high-power linear power supply module is as follows:

[0009] Terminal 2 of the voltage regulator chip outputs voltage to the outside;

[0010] Terminal 2 of the voltage regulator chip is connected in series with resistors R1, R2, and R3 in sequence and then grounded;

[0011] Terminal 1 of the voltage regulator chip is connected in series with resistors R4, R1, R2, and R3 in sequence and then grounded;

[0012] Terminal 1 of the voltage regulator chip is connected in series with capacitor C1, resistor R2, and resistor R3 in sequence and then grounded;

[0013] Terminal 1 of the voltage regulator chip is connected to the voltage reference chip and then grounded;

[0014] Terminal 3 of the voltage regulator chip is connected to terminal 1 of transistor T;

[0015] Terminal 3 of the voltage regulator chip is connected in series with resistor R5 and then connected to the cathode of diode D1;

[0016] Terminal 3 of the voltage regulator chip is connected in series with resistor R5 and then connected to the cathode of diode D2;

[0017] Terminal 2 of transistor T is connected to terminal 2 of the voltage regulator chip;

[0018] Terminal 1 of transistor T is connected to the cathodes of diodes D1 and D2 respectively;

[0019] The anode of the diode D1 is connected to the cathode of the diode D3;

[0020] The anode of the diode D2 is connected to the cathode of the diode D4;

[0021] The anodes of diodes D3 and D4 are grounded;

[0022] Terminals 3 and 6 of the toroidal transformer are used as power signal input terminals;

[0023] Connect terminal 5 of the toroidal transformer to terminal 4;

[0024] Terminal 11 of the toroidal transformer is connected to terminal 13 and the anode of diode D1 respectively;

[0025] Terminal No. 12 of the toroidal transformer is connected to terminal No. 14 and the anode of diode D2 respectively.

[0026] Further, the toroidal transformer has a power of 50W;

[0027] The voltage stabilizing chip is a LM317 voltage stabilizing chip;

[0028] The voltage reference chip is a TL431 voltage reference chip.

[0029] Furthermore, the circuit topology of the data processing module is as follows:

[0030] Terminal 23 of the ARM chip is connected in series with capacitor C2 and then grounded;

[0031] Connect the resistor R6 in series to the ARM chip's terminal 23 and then to the terminal 24;

[0032] Terminal 23 of the ARM chip is connected in series with piezoelectric crystal K and capacitor C3 and then grounded;

[0033] Terminal 24 of the ARM chip is connected in series with capacitor C3 and then grounded;

[0034] The ARM chip's terminal 143 is connected in series with resistor R7;

[0035] Terminal 138 of the ARM chip is connected in series with resistor R8 and then grounded;

[0036] Terminal 71 of the ARM chip is connected in series with capacitor C4 and then grounded;

[0037] Terminal 106 of the ARM chip is connected in series with capacitor C5 and then grounded;

[0038] Terminals 16, 38, 51, 61, 83, 94, 107, 120, 130, and 31 of the ARM chip are grounded;

[0039] Terminal 32 of the ARM chip is connected in series with capacitors C34 and C49 and then connected to terminal 144;

[0040] Terminal 32 of the ARM chip is connected in series with capacitors C35 and C49 respectively;

[0041] Terminal 6 of the ARM chip is connected in series with capacitors C35, C36, and C37 respectively;

[0042] Terminal 95 of the ARM chip is connected in series with capacitors C34 and C38 respectively;

[0043] Terminal 17 of the ARM chip is connected in series with capacitors C34 and C39 respectively;

[0044] Terminal 30 of the ARM chip is connected in series with capacitors C34 and C40 respectively;

[0045] Terminal 39 of the ARM chip is connected in series with capacitors C34 and C41 respectively;

[0046] Terminal 52 of the ARM chip is connected in series with capacitors C34 and C42 respectively;

[0047] Terminal 62 of the ARM chip is connected in series with capacitors C34 and C43 respectively;

[0048] Terminal 72 of the ARM chip is connected in series with capacitors C34 and C44 respectively;

[0049] Terminal 84 of the ARM chip is connected in series with capacitors C34 and C45 respectively;

[0050] Terminal 108 of the ARM chip is connected in series with capacitors C34 and C46 respectively;

[0051] Terminal 121 of the ARM chip is connected in series with capacitors C34 and C47 respectively;

[0052] Terminal 131 of the ARM chip is connected in series with capacitors C34 and C48 respectively;

[0053] Terminal 144 of the ARM chip is connected in series with capacitors C34 and C49 respectively.

[0054] Further, terminals 6, 11, 20, 21, 27, 50, 75, and 100 of the ARM chip are connected to a high-power linear power module;

[0055] Terminals 37, 38, 39, 40, 41, 42, 43, 44, 45, 55, 56, 57, 61, 62, 81, and 82 of the ARM chip are connected to the current measurement module;

[0056] Terminals 87, 88, and 89 of the ARM chip are used as data output terminals.

[0057] Furthermore, the frequency of the ARM chip is greater than 480 MHz.

[0058] Furthermore, the data processing module is connected to the current measurement module via a high-speed bus.

[0059] Furthermore, the current measurement module includes two measurement circuits to achieve dual-channel current collection;

[0060] The circuit topology of each measurement circuit is shown below:

[0061] Terminal 6 of the operational amplifier OP1 is connected in series with resistors R9, R10, R11, and R12 in sequence;

[0062] Terminal 5 of the operational amplifier OP1 is connected in series with resistors R10, R11, and R12 in sequence;

[0063] Terminal 2 of the operational amplifier OP2 is connected in series with switch Q1;

[0064] Terminal 2 of the operational amplifier OP2 is connected in series with resistors R10, R11, and R12 in sequence;

[0065] Terminal 3 of the operational amplifier OP2 is connected in series with resistors R11 and R12 in sequence;

[0066] Terminal 6 of the operational amplifier OP3 is connected in series with switch Q2;

[0067] Terminal 6 of the operational amplifier OP3 is connected in series with resistors R11 and R12 in sequence;

[0068] Terminal 5 of operational amplifier OP3 is connected in series with resistor R12;

[0069] Terminal 2 of the operational amplifier OP4 is connected in series with switch Q3;

[0070] Terminal 2 of the operational amplifier OP4 is connected in series with resistor R12 and then connected to terminal 3.

[0071] Terminals 1 and 7 of the operational amplifier OP1, the operational amplifier OP2, the operational amplifier OP3, and the operational amplifier OP4 are connected to the ADC chip;

[0072] The resistor R9 of the measuring circuit serves as the current input terminal, and the resistor R12 serves as the current output terminal;

[0073] Terminal No. 8 of the operational amplifier OP1, the operational amplifier OP2, the operational amplifier OP3, and the operational amplifier OP4 is connected to the high-power linear power supply module, and terminals No. 1 and No. 7 are connected to the data processing module.

[0074] Furthermore, the frequency of the current measurement module is greater than 200 KHz.

[0075] Further, it also includes a host computer;

[0076] The data processing module transmits the current signal to the host computer through the Ethernet port.

[0077] The technical effect of the present invention is undoubted, and the beneficial effects of the present invention are as follows:

[0078] 1) Adaptive range current measurement is achieved by switching the shunt resistor;

[0079] 2) The power supply system is composed of a low-ripple, low-noise linear power module to reduce interference during the measurement process;

[0080] 3) The data processing module integrates, processes and transmits the data of multiple acquisition modules to realize multi-channel synchronous current acquisition.

[0081] 4) It can realize accurate measurement of large current and micro current (1uA-50A). BRIEF DESCRIPTION OF THE DRAWINGS

[0082] Figure 1 It is the overall physical picture of the measurement system;

[0083] Figure 2 This is a physical picture of the current measurement system module;

[0084] Figure 3 This is a physical picture of the linear power system module;

[0085] FIG4 is a schematic diagram of the circuit of the data processing module.

[0086] Figure 5 It is the operation interface of the host computer software;

[0087] Figure 6 It is the circuit diagram of linear power supply;

[0088] Figure 7 This is the effect diagram after anti-interference;

[0089] Figure 8 This is the schematic diagram before anti-interference;

[0090] Fig. 9 is a schematic diagram of an adaptive measurement circuit;

[0091] Fig.10 Flow chart of measurement operation steps;

[0092] Fig.11 This is the logic flow chart for adaptive range judgment. DETAILED DESCRIPTION

[0093] The present invention is further described below in conjunction with the embodiments, but it should not be understood that the above subject matter of the present invention is limited to the following embodiments. Without departing from the above technical ideas of the present invention, various substitutions and changes are made according to the common technical knowledge and customary means in the art, which should all be included in the protection scope of the present invention.

[0094] Embodiment 1:

[0095] See also Figures 1 to 11 , a multi-channel adaptive range current high-speed measurement system, including a high-power linear power supply module, a data processing module, and a current measurement module;

[0096] The high-power linear power supply module is electrically connected to the data processing module and the current measurement module to supply power to the data processing module and the current measurement module. The output voltage of the high-power linear power supply module is 12V and 50W.

[0097] The current measurement module is electrically connected to the product to be monitored and receives the current signal of the product to be monitored;

[0098] The current measuring module is electrically connected to the data processing module and transmits the current signal to the data processing module.

[0099] The circuit topology of the high-power linear power supply module is as follows:

[0100] Terminal 2 of the voltage regulator chip outputs voltage to the outside;

[0101] Terminal 2 of the voltage regulator chip is connected in series with resistors R1, R2, and R3 in sequence and then grounded;

[0102] Terminal 1 of the voltage regulator chip is connected in series with resistors R4, R1, R2, and R3 in sequence and then grounded;

[0103] Terminal 1 of the voltage regulator chip is connected in series with capacitor C1, resistor R2, and resistor R3 in sequence and then grounded;

[0104] Terminal 1 of the voltage regulator chip is connected to the voltage reference chip and then grounded;

[0105] Terminal 3 of the voltage regulator chip is connected to terminal 1 of transistor T;

[0106] Terminal 3 of the voltage regulator chip is connected in series with resistor R5 and then connected to the cathode of diode D1;

[0107] Terminal 3 of the voltage regulator chip is connected in series with resistor R5 and then connected to the cathode of diode D2;

[0108] Terminal 2 of transistor T is connected to terminal 2 of the voltage regulator chip;

[0109] Terminal 1 of transistor T is connected to the cathodes of diodes D1 and D2 respectively;

[0110] The anode of the diode D1 is connected to the cathode of the diode D3;

[0111] The anode of the diode D2 is connected to the cathode of the diode D4;

[0112] The anodes of diodes D3 and D4 are grounded;

[0113] Terminals 3 and 6 of the toroidal transformer are used as power signal input terminals;

[0114] Connect terminal 5 of the toroidal transformer to terminal 4;

[0115] Terminal 11 of the toroidal transformer is connected to terminal 13 and the anode of diode D1 respectively;

[0116] Terminal No. 12 of the toroidal transformer is connected to terminal No. 14 and the anode of diode D2 respectively.

[0117] The toroidal transformer has a power of 50W;

[0118] The voltage stabilizing chip is a LM317 voltage stabilizing chip;

[0119] The voltage reference chip is a TL431 voltage reference chip.

[0120] The circuit topology of the data processing module is as follows:

[0121] Terminal 23 of the ARM chip is connected in series with capacitor C2 and then grounded;

[0122] Connect the resistor R6 in series to the ARM chip's terminal 23 and then to the terminal 24;

[0123] Terminal 23 of the ARM chip is connected in series with piezoelectric crystal K and capacitor C3 and then grounded;

[0124] Terminal 24 of the ARM chip is connected in series with capacitor C3 and then grounded;

[0125] The ARM chip's terminal 143 is connected in series with resistor R7;

[0126] Terminal 138 of the ARM chip is connected in series with resistor R8 and then grounded;

[0127] Terminal 71 of the ARM chip is connected in series with capacitor C4 and then grounded;

[0128] Terminal 106 of the ARM chip is connected in series with capacitor C5 and then grounded;

[0129] Terminals 16, 38, 51, 61, 83, 94, 107, 120, 130, and 31 of the ARM chip are grounded;

[0130] Terminal 32 of the ARM chip is connected in series with capacitors C34 and C49 and then connected to terminal 144;

[0131] Terminal 32 of the ARM chip is connected in series with capacitors C35 and C49 respectively;

[0132] Terminal 6 of the ARM chip is connected in series with capacitors C35, C36, and C37 respectively;

[0133] Terminal 95 of the ARM chip is connected in series with capacitors C34 and C38 respectively;

[0134] Terminal 17 of the ARM chip is connected in series with capacitors C34 and C39 respectively;

[0135] Terminal 30 of the ARM chip is connected in series with capacitors C34 and C40 respectively;

[0136] Terminal 39 of the ARM chip is connected in series with capacitors C34 and C41 respectively;

[0137] Terminal 52 of the ARM chip is connected in series with capacitors C34 and C42 respectively;

[0138] Terminal 62 of the ARM chip is connected in series with capacitors C34 and C43 respectively;

[0139] Terminal 72 of the ARM chip is connected in series with capacitors C34 and C44 respectively;

[0140] Terminal 84 of the ARM chip is connected in series with capacitors C34 and C45 respectively;

[0141] Terminal 108 of the ARM chip is connected in series with capacitors C34 and C46 respectively;

[0142] Terminal 121 of the ARM chip is connected in series with capacitors C34 and C47 respectively;

[0143] Terminal 131 of the ARM chip is connected in series with capacitors C34 and C48 respectively;

[0144] Terminal 144 of the ARM chip is connected in series with capacitors C34 and C49 respectively.

[0145] Terminals 6, 11, 20, 21, 27, 50, 75, and 100 of the ARM chip are connected to a high-power linear power module;

[0146] Terminals 37, 38, 39, 40, 41, 42, 43, 44, 45, 55, 56, 57, 61, 62, 81, and 82 of the ARM chip are connected to the current measurement module;

[0147] Terminals 87, 88, and 89 of the ARM chip are used as data output terminals.

[0148] The frequency of the ARM chip is greater than 480 MHz.

[0149] The data processing module is connected to the current measuring module via a high-speed bus.

[0150] The current measurement module includes two measurement circuits to realize dual-channel current collection;

[0151] The circuit topology of each measurement circuit is shown below:

[0152] Terminal 6 of the operational amplifier OP1 is connected in series with resistors R9, R10, R11, and R12 in sequence;

[0153] Terminal 5 of the operational amplifier OP1 is connected in series with resistors R10, R11, and R12 in sequence;

[0154] Terminal 2 of the operational amplifier OP2 is connected in series with switch Q1;

[0155] Terminal 2 of the operational amplifier OP2 is connected in series with resistors R10, R11, and R12 in sequence;

[0156] Terminal 3 of the operational amplifier OP2 is connected in series with resistors R11 and R12 in sequence;

[0157] Terminal 6 of the operational amplifier OP3 is connected in series with switch Q2;

[0158] Terminal 6 of the operational amplifier OP3 is connected in series with resistors R11 and R12 in sequence;

[0159] Terminal 5 of operational amplifier OP3 is connected in series with resistor R12;

[0160] Terminal 2 of the operational amplifier OP4 is connected in series with switch Q3;

[0161] Terminal 2 of the operational amplifier OP4 is connected in series with resistor R12 and then connected to terminal 3.

[0162] Terminals 1 and 7 of the operational amplifier OP1, the operational amplifier OP2, the operational amplifier OP3, and the operational amplifier OP4 are connected to the ADC chip;

[0163] The resistor R9 of the measuring circuit serves as the current input terminal, and the resistor R12 serves as the current output terminal;

[0164] Terminal No. 8 of the operational amplifier OP1, the operational amplifier OP2, the operational amplifier OP3, and the operational amplifier OP4 is connected to the high-power linear power supply module, and terminals No. 1 and No. 7 are connected to the data processing module.

[0165] The frequency of the current measurement module is greater than 200 KHz.

[0166] It also includes the host computer;

[0167] The data processing module transmits the current signal to the host computer through the Ethernet port.

[0168] Embodiment 2:

[0169] A multi-channel adaptive range current high-speed measurement system, comprising a high-power linear power supply module, a data processing module, and a current measurement module;

[0170] The high-power linear power supply module is electrically connected to the data processing module and the current measurement module to supply power to the data processing module and the current measurement module;

[0171] The current measurement module is electrically connected to the product to be monitored and receives the current signal of the product to be monitored;

[0172] The current measuring module is electrically connected to the data processing module and transmits the current signal to the data processing module.

[0173] Embodiment 3:

[0174] A multi-channel adaptive range current high-speed measurement system, the technical content is the same as that of Example 2, further, the circuit topology of the high-power linear power supply module is as follows:

[0175] Terminal 2 of the voltage regulator chip outputs voltage to the outside;

[0176] Terminal 2 of the voltage regulator chip is connected in series with resistors R1, R2, and R3 in sequence and then grounded;

[0177] Terminal 1 of the voltage regulator chip is connected in series with resistors R4, R1, R2, and R3 in sequence and then grounded;

[0178] Terminal 1 of the voltage regulator chip is connected in series with capacitor C1, resistor R2, and resistor R3 in sequence and then grounded;

[0179] Terminal 1 of the voltage regulator chip is connected to the voltage reference chip and then grounded;

[0180] Terminal 3 of the voltage regulator chip is connected to terminal 1 of transistor T;

[0181] Terminal 3 of the voltage regulator chip is connected in series with resistor R5 and then connected to the cathode of diode D1;

[0182] Terminal 3 of the voltage regulator chip is connected in series with resistor R5 and then connected to the cathode of diode D2;

[0183] Terminal 2 of transistor T is connected to terminal 2 of the voltage regulator chip;

[0184] Terminal 1 of transistor T is connected to the cathodes of diodes D1 and D2 respectively;

[0185] The anode of the diode D1 is connected to the cathode of the diode D3;

[0186] The anode of the diode D2 is connected to the cathode of the diode D4;

[0187] The anodes of diodes D3 and D4 are grounded;

[0188] Terminals 3 and 6 of the toroidal transformer are used as power signal input terminals;

[0189] Connect terminal 5 of the toroidal transformer to terminal 4;

[0190] Terminal 11 of the toroidal transformer is connected to terminal 13 and the anode of diode D1 respectively;

[0191] Terminal No. 12 of the toroidal transformer is connected to terminal No. 14 and the anode of diode D2 respectively.

[0192] Embodiment 4:

[0193] A multi-channel adaptive range current high-speed measurement system, the technical content is the same as any one of embodiments 2-3, further, the toroidal transformer power is 50W;

[0194] The voltage stabilizing chip is a LM317 voltage stabilizing chip;

[0195] The voltage reference chip is a TL431 voltage reference chip.

[0196] Embodiment 5:

[0197] A multi-channel adaptive range current high-speed measurement system, the technical content of which is the same as any one of Embodiments 2-4, and further, the circuit topology of the data processing module is as follows:

[0198] Terminal 23 of the ARM chip is connected in series with capacitor C2 and then grounded;

[0199] Connect the resistor R6 in series to the ARM chip's terminal 23 and then to the terminal 24;

[0200] Terminal 23 of the ARM chip is connected in series with piezoelectric crystal K and capacitor C3 and then grounded;

[0201] Terminal 24 of the ARM chip is connected in series with capacitor C3 and then grounded;

[0202] The ARM chip's terminal 143 is connected in series with resistor R7;

[0203] Terminal 138 of the ARM chip is connected in series with resistor R8 and then grounded;

[0204] Terminal 71 of the ARM chip is connected in series with capacitor C4 and then grounded;

[0205] Terminal 106 of the ARM chip is connected in series with capacitor C5 and then grounded;

[0206] Terminals 16, 38, 51, 61, 83, 94, 107, 120, 130, and 31 of the ARM chip are grounded;

[0207] Terminal 32 of the ARM chip is connected in series with capacitors C34 and C49 and then connected to terminal 144;

[0208] Terminal 32 of the ARM chip is connected in series with capacitors C35 and C49 respectively;

[0209] Terminal 6 of the ARM chip is connected in series with capacitors C35, C36, and C37 respectively;

[0210] Terminal 95 of the ARM chip is connected in series with capacitors C34 and C38 respectively;

[0211] Terminal 17 of the ARM chip is connected in series with capacitors C34 and C39 respectively;

[0212] Terminal 30 of the ARM chip is connected in series with capacitors C34 and C40 respectively;

[0213] Terminal 39 of the ARM chip is connected in series with capacitors C34 and C41 respectively;

[0214] Terminal 52 of the ARM chip is connected in series with capacitors C34 and C42 respectively;

[0215] Terminal 62 of the ARM chip is connected in series with capacitors C34 and C43 respectively;

[0216] Terminal 72 of the ARM chip is connected in series with capacitors C34 and C44 respectively;

[0217] Terminal 84 of the ARM chip is connected in series with capacitors C34 and C45 respectively;

[0218] Terminal 108 of the ARM chip is connected in series with capacitors C34 and C46 respectively;

[0219] Terminal 121 of the ARM chip is connected in series with capacitors C34 and C47 respectively;

[0220] Terminal 131 of the ARM chip is connected in series with capacitors C34 and C48 respectively;

[0221] Terminal 144 of the ARM chip is connected in series with capacitors C34 and C49 respectively.

[0222] Embodiment 6:

[0223] A multi-channel adaptive range current high-speed measurement system, the technical content of which is the same as any one of Embodiments 2-5, and further, the frequency of the ARM chip is greater than 480 MHz.

[0224] Embodiment 7:

[0225] A multi-channel adaptive range current high-speed measurement system, the technical content of which is the same as any one of Examples 2-6, and further, the data processing module is connected to the current measurement module via a high-speed bus.

[0226] Embodiment 8:

[0227] A multi-channel adaptive range current high-speed measurement system, the technical content of which is the same as any one of embodiments 2-7, further, the current measurement module includes two measurement circuits to realize dual-channel current acquisition;

[0228] The circuit topology of each measurement circuit is shown below:

[0229] Terminal 6 of the operational amplifier OP1 is connected in series with resistors R9, R10, R11, and R12 in sequence;

[0230] Terminal 5 of the operational amplifier OP1 is connected in series with resistors R10, R11, and R12 in sequence;

[0231] Terminal 2 of the operational amplifier OP2 is connected in series with switch Q1;

[0232] Terminal 2 of the operational amplifier OP2 is connected in series with resistors R10, R11, and R12 in sequence;

[0233] Terminal 3 of the operational amplifier OP2 is connected in series with resistors R11 and R12 in sequence;

[0234] Terminal 6 of the operational amplifier OP3 is connected in series with switch Q2;

[0235] Terminal 6 of the operational amplifier OP3 is connected in series with resistors R11 and R12 in sequence;

[0236] Terminal 5 of operational amplifier OP3 is connected in series with resistor R12;

[0237] Terminal 2 of the operational amplifier OP4 is connected in series with switch Q3;

[0238] Terminal 2 of the operational amplifier OP4 is connected in series with resistor R12 and then connected to terminal 3.

[0239] Terminals 1 and 7 of the operational amplifier OP1, the operational amplifier OP2, the operational amplifier OP3, and the operational amplifier OP4 are connected to the ADC chip;

[0240] The resistor R9 of the measuring circuit serves as the current input terminal, and the resistor R12 serves as the current output terminal;

[0241] Terminal No. 8 of the operational amplifier OP1, the operational amplifier OP2, the operational amplifier OP3, and the operational amplifier OP4 is connected to the high-power linear power supply module, and terminals No. 1 and No. 7 are connected to the data processing module.

[0242] Embodiment 9:

[0243] A multi-channel adaptive range current high-speed measurement system, the technical content of which is the same as any one of Embodiments 2-8, and further, the frequency of the current measurement module is greater than 200KHz.

[0244] Embodiment 10:

[0245] A multi-channel adaptive range current high-speed measurement system, the technical content of which is the same as any one of Embodiments 2-9, and further includes a host computer;

[0246] The data processing module transmits the current signal to the host computer through the Ethernet port.

[0247] Embodiment 11:

[0248] A multi-channel adaptive range current high-speed measurement system, the technical content of which is the same as any one of Embodiments 2-10, and further, the ARM chip model is STM32H723ZGT6.

[0249] Embodiment 12:

[0250] A multi-channel adaptive range current high-speed measurement system, the technical content of which is the same as any one of embodiments 2-11, further, terminals 6, 11, 20, 21, 27, 50, 75, and 100 of the ARM chip are connected to a high-power linear power supply module;

[0251] Terminals 37, 38, 39, 40, 41, 42, 43, 44, 45, 55, 56, 57, 61, 62, 81, and 82 of the ARM chip are connected to the current measurement module;

[0252] Terminals 87, 88, and 89 of the ARM chip are used as data output terminals.

[0253] Embodiment 13:

[0254] A multi-channel adaptive range current high-speed measurement system integrates current acquisition, data processing and transmission. The system includes a high-power linear power supply module, a data processing module, a current measurement module and a host computer data processing software.

[0255] This system supplies power to the data processing module and the measuring module through the power module, measures the product current through the measuring module, integrates, processes and uploads the measured data to the host computer data processing software through the data processing module, and displays, processes and records the collected data through the host computer data processing software.

[0256] The linear power supply module adopts a 50W high-power, low-leakage magnetic, high-efficiency toroidal transformer, and cooperates with devices such as LM317 voltage regulator chip and TL431 voltage reference chip to form a linear power supply circuit.

[0257] The above technical solution can achieve high-power, low-ripple, low-noise adjustable voltage output, provide a high-quality, stable and reliable power supply system for the current measurement module, and reduce external noise interference during the measurement process of the measurement module. The following is a comparison before and after anti-interference.

[0258] The data processing module uses an ARM chip with a main frequency of up to 480MHz, which is responsible for receiving and processing various instructions from the host computer, interacting with the current measurement module through a high-speed bus, integrating and processing the data, and finally uploading the data to the host computer software system through a high-speed Ethernet port.

[0259] By adopting the above technical solution, synchronous acquisition of multi-channel current modules can be realized, and real-time processing and transmission of data can be achieved.

[0260] The current measurement module is a wide-range, multi-position, high-speed measurement circuit that uses two AD7606 high-speed ADC chips to achieve dual-channel synchronous acquisition at up to 200KHz. A single measurement circuit uses four shunt resistors in conjunction with four sets of preamplifiers, and the four shunt resistors are connected in series to the working circuit. When the output voltage value reaches a certain threshold due to the increase in the measured current value, the short-circuit switch is quickly closed to complete the short-circuit of the high-impedance shunt resistor. In this way, the measured voltage signal is transmitted through four separate paths.

Claims

1. A multi-channel adaptive range current high-speed measurement system, characterized by: It includes a high-power linear power supply module, a data processing module, and a current measurement module. The high-power linear power supply module is electrically connected to the data processing module and the current measurement module to supply power to the data processing module and the current measurement module. The current measurement module is electrically connected to the product to be monitored and receives the current signal of the product to be monitored; The current measuring module is electrically connected to the data processing module and transmits the current signal to the data processing module.

2. A multi-channel adaptive range current high-speed measurement system according to claim 1, characterized in that: The circuit topology of the high-power linear power supply module is as follows: Terminal 2 of the voltage regulator chip outputs voltage to the outside; Terminal 2 of the voltage regulator chip is connected in series with resistors R1, R2, and R3 in sequence and then grounded; Terminal 1 of the voltage regulator chip is connected in series with resistors R4, R1, R2, and R3 in sequence and then grounded; Terminal 1 of the voltage regulator chip is connected in series with capacitor C1, resistor R2, and resistor R3 in sequence and then grounded; Terminal 1 of the voltage regulator chip is connected to the voltage reference chip and then grounded; Terminal 3 of the voltage regulator chip is connected to terminal 1 of transistor T; Terminal 3 of the voltage regulator chip is connected in series with resistor R5 and then connected to the cathode of diode D1; Terminal 3 of the voltage regulator chip is connected in series with resistor R5 and then connected to the cathode of diode D2; Terminal 2 of transistor T is connected to terminal 2 of the voltage regulator chip; Terminal 1 of transistor T is connected to the cathodes of diodes D1 and D2 respectively; The anode of the diode D1 is connected to the cathode of the diode D3; The anode of the diode D2 is connected to the cathode of the diode D4; The anodes of diodes D3 and D4 are grounded; Terminals 3 and 6 of the toroidal transformer are used as power signal input terminals; Connect terminal 5 of the toroidal transformer to terminal 4; Terminal 11 of the toroidal transformer is connected to terminal 13 and the anode of diode D1 respectively; Terminal No. 12 of the toroidal transformer is connected to terminal No. 14 and the anode of diode D2 respectively.

3. A multi-channel adaptive range current high-speed measurement system according to claim 2, characterized in that: The toroidal transformer has a power of 50W; The voltage stabilizing chip is a LM317 voltage stabilizing chip; The voltage reference chip is a TL431 voltage reference chip.

4. A multi-channel adaptive range current high-speed measurement system according to claim 1, characterized in that: The circuit topology of the data processing module is as follows: Terminal 23 of the ARM chip is connected in series with capacitor C2 and then grounded; Connect the resistor R6 in series to the ARM chip's terminal 23 and then to the terminal 24; Terminal 23 of the ARM chip is connected in series with piezoelectric crystal K and capacitor C3 and then grounded; Terminal 24 of the ARM chip is connected in series with capacitor C3 and then grounded; The ARM chip's terminal 143 is connected in series with resistor R7; Terminal 138 of the ARM chip is connected in series with resistor R8 and then grounded; Terminal 71 of the ARM chip is connected in series with capacitor C4 and then grounded; Terminal 106 of the ARM chip is connected in series with capacitor C5 and then grounded; Terminals 16, 38, 51, 61, 83, 94, 107, 120, 130, and 31 of the ARM chip are grounded; Terminal 32 of the ARM chip is connected in series with capacitors C34 and C49 and then connected to terminal 144; Terminal 32 of the ARM chip is connected in series with capacitors C35 and C49 respectively; Terminal 6 of the ARM chip is connected in series with capacitors C35, C36, and C37 respectively; Terminal 95 of the ARM chip is connected in series with capacitors C34 and C38 respectively; Terminal 17 of the ARM chip is connected in series with capacitors C34 and C39 respectively; Terminal 30 of the ARM chip is connected in series with capacitors C34 and C40 respectively; Terminal 39 of the ARM chip is connected in series with capacitors C34 and C41 respectively; Terminal 52 of the ARM chip is connected in series with capacitors C34 and C42 respectively; Terminal 62 of the ARM chip is connected in series with capacitors C34 and C43 respectively; Terminal 72 of the ARM chip is connected in series with capacitors C34 and C44 respectively; Terminal 84 of the ARM chip is connected in series with capacitors C34 and C45 respectively; Terminal 108 of the ARM chip is connected in series with capacitors C34 and C46 respectively; Terminal 121 of the ARM chip is connected in series with capacitors C34 and C47 respectively; Terminal 131 of the ARM chip is connected in series with capacitors C34 and C48 respectively; Terminal 144 of the ARM chip is connected in series with capacitors C34 and C49 respectively.

5. A multi-channel adaptive range current high-speed measurement system according to claim 4, characterized in that: Terminals 6, 11, 20, 21, 27, 50, 75, and 100 of the ARM chip are connected to a high-power linear power module; Terminals 37, 38, 39, 40, 41, 42, 43, 44, 45, 55, 56, 57, 61, 62, 81, and 82 of the ARM chip are connected to the current measurement module; Terminals 87, 88, and 89 of the ARM chip are used as data output terminals.

6. A multi-channel adaptive range current high-speed measurement system according to claim 4, characterized in that: The frequency of the ARM chip is greater than 480 MHz.

7. The multi-channel adaptive range current high-speed measurement system according to claim 1, characterized in that: The data processing module is connected to the current measuring module via a high-speed bus.

8. The multi-channel adaptive range current high-speed measurement system according to claim 1, characterized in that: The current measurement module includes two measurement circuits to realize dual-channel current collection; The circuit topology of each measurement circuit is shown below: Terminal 6 of the operational amplifier OP1 is connected in series with resistors R9, R10, R11, and R12 in sequence; Terminal 5 of the operational amplifier OP1 is connected in series with resistors R10, R11, and R12 in sequence; Terminal 2 of the operational amplifier OP2 is connected in series with switch Q1; Terminal 2 of the operational amplifier OP2 is connected in series with resistors R10, R11, and R12 in sequence; Terminal 3 of the operational amplifier OP2 is connected in series with resistors R11 and R12 in sequence; Terminal 6 of the operational amplifier OP3 is connected in series with switch Q2; Terminal 6 of the operational amplifier OP3 is connected in series with resistors R11 and R12 in sequence; Terminal 5 of operational amplifier OP3 is connected in series with resistor R12; Terminal 2 of the operational amplifier OP4 is connected in series with switch Q3; Terminal 2 of operational amplifier OP4 is connected in series with resistor R12 and then to terminal 3; Terminals 1 and 7 of the operational amplifier OP1, the operational amplifier OP2, the operational amplifier OP3, and the operational amplifier OP4 are connected to the ADC chip; The resistor R9 of the measuring circuit serves as the current input terminal, and the resistor R12 serves as the current output terminal; Terminal No. 8 of the operational amplifier OP1, the operational amplifier OP2, the operational amplifier OP3, and the operational amplifier OP4 is connected to the high-power linear power supply module, and terminals No. 1 and No. 7 are connected to the data processing module.

9. The multi-channel adaptive range current high-speed measurement system according to claim 1, characterized in that: The frequency of the current measurement module is greater than 200 KHz.

10. The multi-channel adaptive range current high-speed measurement system according to claim 1, characterized in that: It also includes the host computer; The data processing module transmits the current signal to the host computer through the Ethernet port.

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