CN213986796U - Digital torque detection circuit - Google Patents
Digital torque detection circuit Download PDFInfo
- Publication number
- CN213986796U CN213986796U CN202023164869.XU CN202023164869U CN213986796U CN 213986796 U CN213986796 U CN 213986796U CN 202023164869 U CN202023164869 U CN 202023164869U CN 213986796 U CN213986796 U CN 213986796U
- Authority
- CN
- China
- Prior art keywords
- resistor
- current
- channel
- parallel
- voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model provides a digital torque detection circuit, current component output circuit output weak current signal, the current component as active power calculation, voltage component output circuit further converts voltage signal into after producing the weak current and exports, as the voltage component that active power calculated, calculation circuit obtains active power after carrying out digital processing and multiplication to above-mentioned current component and voltage component to export after converting this active power into frequency signal. By the method, the introduced digital torque can be used as a measuring scheme of the load torque in the actuator, the output frequency signal can be used as a measuring signal for detection and verification of the power meter, the torque range under a specific load environment can be accurately estimated, the load range protected by the torque can be accurately quantified, and therefore the operation reliability of the actuator is further improved.
Description
Technical Field
The utility model belongs to the technical field of the detection circuitry, in particular to digital torque detection circuit.
Background
In instruments and meters and industrial automation systems, various non-electrical physical quantities such as temperature, pressure, speed, angle and density are generally required to be measured, and the non-electrical physical quantities are required to be converted into analog quantity electric signals firstly and then transmitted into a remote centralized control room so as to be collected and monitored. However, in the prior art, when monitoring the load of the actuator, other physical quantities are output first, and the analog quantity is obtained indirectly through calculation, so that the real-time torque of the actuator cannot be directly output, the torque range under a specific load environment cannot be accurately estimated, and the setting of the load range cannot be accurately quantized, which is inconvenient in the actual monitoring work.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a digital torque detection circuit.
The utility model discloses specific technical scheme as follows:
the utility model provides a digital torque detection circuit, including current component output circuit, voltage component output circuit and power signal output circuit, current component output circuit converts the voltage of applying into weak current signal, the current component as active power calculation, voltage component output circuit further converts voltage signal, the voltage component as active power calculation into after the voltage that will apply converts weak current, power signal output circuit is right current component with voltage component obtains active power after carrying out digital processing and multiplication operation, and will active power converts and exports after the frequency signal.
Further, the current component output circuit comprises a current transformer JN2, output ends of the current transformer JN2 are respectively connected with a cross-over resistor R7 and a cross-over resistor R14 which are connected in parallel, and the cross-over resistor R7 and the cross-over resistor R14 are respectively connected to a current input channel of the power signal output circuit; the diode D1 is connected in parallel to the bridging resistor R7 and grounded in parallel through the capacitor C10, and the diode D3 is connected in parallel to the bridging resistor R14 and grounded in parallel through the capacitor C15.
Further, the voltage component output circuit comprises a current-type voltage transformer U10, an input end of the current-type voltage transformer U10 is connected with three-phase power, wherein a pin 1 is connected with PhaseU and PhaseW, a pin 2 is connected with PhaseV, a pin 3 is connected to a voltage input channel of the power signal output circuit through a sampling resistor R24, and a pin 4 is grounded and connected with a sampling resistor R22 connected with the sampling resistor R24 in parallel; a current limiting resistor R23 is connected in parallel between the pin 1 and the pin 2, and the sampling resistor R24 is connected in parallel to the ground through a capacitor C18.
Furthermore, the power signal output circuit comprises an AD chip, the AD chip is provided with a current input channel, a voltage input channel, a power channel, a standard voltage channel, a reset channel, a verification frequency selection channel, and a verification frequency output channel, the current input channel is connected to the output end of the current component output circuit, the voltage input channel is connected to the output end of the voltage component output circuit, and the power channel is connected to the positive electrode of the power supply and is grounded in series through a capacitor C8; the reset channel is connected in series with the anode of a power supply through a resistor R10, and the standard voltage channel is connected with a resistor R12 which is connected with the resistor R10 in parallel and is grounded in parallel through a capacitor C13; the check frequency selection channel is connected with the positive pole of a power supply through a resistor R4 and is grounded in parallel through a capacitor C17, the check frequency output channel is connected with a resistor R4 and a diode D2 which are connected in series, the negative pole of the diode D2 is connected with a frequency output joint, the diode D2 is connected with a capacitor C6 and a resistor R2 in parallel, the capacitor C6 is connected with the resistor R2, and the check frequency selection channel is connected with the positive pole of the power supply through a resistor R1.
Furthermore, a digital/frequency conversion coefficient selection channel, a current gain selection channel and a clock channel are further arranged on the AD chip, two connectors of the digital/frequency conversion coefficient selection channel are respectively connected to the positive electrode of a power supply through a resistor R15 and a resistor R16 and are respectively grounded in parallel through a capacitor C14 and a capacitor C16; two joints of the current gain selection channel are respectively connected to the positive electrode of a power supply through a resistor R6 and a resistor R9 and are respectively grounded in parallel through a resistor R11 and a resistor R13; two joints of the clock channel are respectively connected with the ground in parallel through a capacitor C5 and a capacitor C7 which are connected with each other in parallel, and a filter is connected between the two joints.
The utility model has the advantages as follows: the utility model provides a digital torque detection circuit, the weak current signal of current component output circuit output, the current component as active power calculation, further convert voltage signal into after voltage component output circuit produces the weak current and export, the voltage component as active power calculation, power signal output circuit obtains active power after carrying out digital processing and multiplication to above-mentioned current component and voltage component, and export after converting this active power into frequency signal. By the method, the introduced digital torque can be used as a measuring scheme of the load torque in the actuator, the output frequency signal can be used as a measuring signal for detection and verification of the power meter, the torque range under a specific load environment can be accurately estimated, the load range protected by the torque can be accurately quantified, and therefore the operation reliability of the actuator is further improved.
Drawings
FIG. 1 is a schematic structural diagram of a digital torque detection circuit according to an embodiment;
fig. 2 is a circuit configuration diagram of a current component output circuit in the digital torque detection circuit according to the embodiment;
FIG. 3 is a circuit diagram of a voltage component output circuit in the digital torque detection circuit according to the embodiment;
fig. 4 is a circuit configuration diagram of a power signal output circuit in the digital torque detection circuit according to the embodiment.
Detailed Description
The present invention will be described in further detail with reference to the following examples and drawings.
Example 1
As shown in fig. 1, the embodiment 1 of the present invention provides a digital torque detection circuit, including current component output circuit 1, voltage component output circuit 2 and power signal output circuit 3, current component output circuit 1 converts the applied voltage into weak current signals, the current component that calculates as active power, voltage component output circuit 2 further converts the applied voltage into voltage signals after converting into weak current, the voltage component that calculates as active power, power signal output circuit 3 obtains active power after carrying out digitization processing and multiplication operation to current component and voltage component, and output after converting active power into frequency signal.
As shown in fig. 2, the current component output circuit 1 includes a current transformer JN2, an output terminal of the current transformer JN2 is respectively connected to a cross-over resistor R7 and a cross-over resistor R14 that are connected in parallel, and the cross-over resistor R7 and the cross-over resistor R14 are respectively connected to a current input channel of the power signal output circuit 3; the bridging resistor R7 is connected with a diode D1 (1N 4148 model) in parallel and grounded in parallel through a capacitor C10(0.1u/16V), and the bridging resistor R14 is connected with a diode D3 (1N 4148 model) in parallel and grounded in parallel through a capacitor C15(0.1 u/16V).
As shown in fig. 3, the voltage component output circuit 2 includes a current-type voltage transformer U10, an input terminal of the current-type voltage transformer U10 is connected to three-phase power, a pin 1 is connected to PhaseU and PhaseW, a pin 2 is connected to PhaseV, the pin 3 is connected to a voltage input channel of the power signal output circuit 3 through a sampling resistor R24(2k Ω), and a pin 4 is grounded and connected to a sampling resistor R22(2k Ω) connected in parallel with the sampling resistor R24; a current limiting resistor R23(1k omega) is connected in parallel between the pin 1 and the pin 2, and a sampling resistor R24 is connected in parallel to the ground through a capacitor C18(10 u/16V).
As shown in fig. 4, the power signal output circuit 3 includes an AD chip (in this embodiment, an AD7755 model is specifically selected), the AD chip is provided with a current input channel (V1P, V1N pin), a voltage input channel (V2N, V2P pin), a power channel (DVdd, AC/DC, AVdd pin), a standard voltage channel (REF in/out pin), a RESET channel (RESET pin), a check frequency selection channel (SCF pin), and a check frequency output channel (CF pin), the V1P pin and the V1N pin are respectively connected to resistors R7 and R14, the V2P pin is connected to a connection point of a sampling resistor R22 and R24, the V2N pin is connected to a resistor R8(1k Ω), and is connected to ground in parallel through a capacitor C11(0.1 u/16V); DVdd, AC/DC and AVdd pins are connected with the anode of a power supply in parallel and are connected with the ground in series through a capacitor C8(0.1 u/16V); the RESET pin is connected in series with the anode of a power supply through a resistor R10(2k omega), and the REF in/out pin is connected with a resistor R12(2k omega) which is connected with a resistor R10 in parallel and is grounded through a capacitor C13(0.1u/16V) in parallel; the SCF pin is connected to the positive electrode of a power supply through a resistor R19(1k omega) and is grounded in parallel through a capacitor C17 (10u/16V), the CF pin is connected with a resistor R4(10k omega) and a diode D2 (1N 4148 model is selected) which are mutually connected in series, the negative electrode of the diode D2 is connected with a frequency output connector (PIC-LJ-INPUT), the diode D2 is connected with a capacitor C6(10u/16V) and a resistor R2 (10k omega) in parallel, and the capacitor C6 and the resistor R2 and the SCF pin are both connected to the positive electrode of the power supply through a resistor R1(10k omega).
The AD chip is also provided with a digital/frequency conversion coefficient selection channel (pins S1 and S0), a current gain selection channel (pins G1 and G0) and a clock channel (pins CLKIN and CLKOUT), wherein the pin S1 and the pin S0 are respectively connected to the positive electrode of a power supply through a resistor R15(1k omega) and a resistor R16(1k omega) and are respectively grounded in parallel through a capacitor C14(10u/16V) and a capacitor C16(10 u/16V); the G1 pin and the G0 pin are respectively connected to the positive electrode of a power supply through a resistor R6(1k omega) and a resistor R9(1k omega) and are respectively grounded in parallel through a resistor R11(1k omega) and a resistor R13(1k omega); the CLKIN pin and the CLKOUT pin are grounded in parallel through a capacitor C5 (22p/16V) and a capacitor C7(22p/16V) which are connected in parallel with each other, respectively, and a filter is connected between the two joints.
When the circuit works, firstly, one phase of three-phase/two-phase electricity penetrates through a central hole of a current transformer JN2 to be used for inducing current flowing through a lead, the current in the lead is induced to a secondary coil of the current transformer in a ratio of 1000:1, the secondary coil outputs the induced current as a current component part for calculating active power, and the induced current is input to pins V1P and V1N (analog input ends of the current sensor) of an AD chip U3; on the other hand, the input terminals (pins 1 and 2) of the current-mode voltage transformer U10 are connected to three-phase power, the current of the primary coil (i.e., the coil between the eye corner 1 and the pin 2) is limited to the mA level by the current limiting resistor R23, so that the voltage signal is converted into a weak current signal, and the weak current signal is output through the secondary coil (i.e., the coil between the pins 3 and 4), which is converted into a voltage signal through the sampling resistors R22 and R24 as a voltage component part of the active power calculation, and is input to the V2P and V2N pins (analog input terminals of the voltage sensor) of the AD chip U3. Two ADCs (analog-digital converters) in the U3 convert voltage signals sampled by the input ac current and ac voltage, respectively, from analog signals to digital signals; the digitalized voltage signal and the digitalized current signal are multiplied to obtain the instantaneous load, the instantaneous load is processed by low-pass filtering and the like to obtain active power, and the active power is converted into a frequency signal and output to a CF pin of U3. The output frequency signal can be used as a measuring signal for the detection and verification of the power meter.
The method can be used for measuring the introduced digital torque as the load torque in the actuator, can accurately estimate the torque range under a specific load environment, and can accurately quantify the load range setting of the over-torque protection, thereby further improving the operation reliability of the actuator.
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by the teaching of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present invention, fall within the protection scope of the present invention.
Claims (5)
1. A digital torque detection circuit is characterized by comprising a current component output circuit (1), a voltage component output circuit (2) and a power signal output circuit (3), wherein the current component output circuit (1) converts an applied voltage into a weak current signal to serve as a current component for active power calculation, the voltage component output circuit (2) converts the applied voltage into the weak current and further converts the weak current into a voltage signal to serve as a voltage component for active power calculation, and the power signal output circuit (3) performs digitization processing and multiplication operation on the current component and the voltage component to obtain active power and converts the active power into a frequency signal to output the frequency signal.
2. The digital torque detection circuit according to claim 1, wherein the current component output circuit (1) comprises a current transformer JN2, an output terminal of the current transformer JN2 is connected to a cross-over resistor R7 and a cross-over resistor R14 which are connected in parallel, respectively, and the cross-over resistor R7 and the cross-over resistor R14 are connected to a current input channel of the power signal output circuit (3), respectively; the diode D1 is connected in parallel to the bridging resistor R7 and grounded in parallel through the capacitor C10, and the diode D3 is connected in parallel to the bridging resistor R14 and grounded in parallel through the capacitor C15.
3. The digital torque detection circuit according to claim 1, wherein the voltage component output circuit (2) comprises a current-mode voltage transformer U10, the input end of the current-mode voltage transformer U10 is connected with three-phase power, wherein pin 1 is connected with PhaseU and PhaseW, pin 2 is connected with PhaseV, pin 3 is connected with the voltage input channel of the power signal output circuit (3) through a sampling resistor R24, and pin 4 is connected with ground and is connected with a sampling resistor R22 connected with the sampling resistor R24 in parallel; a current limiting resistor R23 is connected in parallel between the pin 1 and the pin 2, and the sampling resistor R24 is connected in parallel to the ground through a capacitor C18.
4. The digital torque detection circuit according to claim 1, wherein the power signal output circuit (3) comprises an AD chip, and the AD chip is provided with a current input channel, a voltage input channel, a power channel, a standard voltage channel, a reset channel, a calibration frequency selection channel, and a calibration frequency output channel, the current input channel is connected to the output end of the current component output circuit, the voltage input channel is connected to the output end of the voltage component output circuit, the power channel is connected to the positive power supply and is serially connected to the ground through a capacitor C8; the reset channel is connected in series with the anode of a power supply through a resistor R10, and the standard voltage channel is connected with a resistor R12 which is connected with the resistor R10 in parallel and is grounded in parallel through a capacitor C13; the check frequency selection channel is connected with the positive pole of a power supply through a resistor R19 and is grounded in parallel through a capacitor C17, the check frequency output channel is connected with a resistor R4 and a diode D2 which are connected in series, the negative pole of the diode D2 is connected with a frequency output joint, the diode D2 is connected with a capacitor C6 and a resistor R2 in parallel, the capacitor C6 is connected with the resistor R2, and the check frequency selection channel is connected with the positive pole of the power supply through a resistor R1.
5. The digital torque detection circuit according to claim 4, wherein a digital/frequency conversion coefficient selection channel, a current gain selection channel and a clock channel are further arranged on the AD chip, two connectors of the digital/frequency conversion coefficient selection channel are respectively connected to the positive electrode of a power supply through a resistor R15 and a resistor R16 and are respectively connected to the ground in parallel through a capacitor C14 and a capacitor C16; two joints of the current gain selection channel are respectively connected to the positive electrode of a power supply through a resistor R6 and a resistor R9 and are respectively grounded in parallel through a resistor R11 and a resistor R13; two joints of the clock channel are respectively connected with the ground in parallel through a capacitor C5 and a capacitor C7 which are connected with each other in parallel, and a filter is connected between the two joints.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023164869.XU CN213986796U (en) | 2020-12-24 | 2020-12-24 | Digital torque detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023164869.XU CN213986796U (en) | 2020-12-24 | 2020-12-24 | Digital torque detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213986796U true CN213986796U (en) | 2021-08-17 |
Family
ID=77249454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023164869.XU Active CN213986796U (en) | 2020-12-24 | 2020-12-24 | Digital torque detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213986796U (en) |
-
2020
- 2020-12-24 CN CN202023164869.XU patent/CN213986796U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8373407B2 (en) | Intelligent electronic device having improved analog output resolution | |
| US7920976B2 (en) | Averaging in an intelligent electronic device | |
| CN102967742B (en) | The electric mutual inductor of wide current detection range | |
| CN107402324B (en) | Power supply sampling circuit and method based on single current transformer and low-voltage circuit breaker thereof | |
| CN104820127A (en) | Metal oxide arrester resistance current extracting method and device | |
| CN103675430A (en) | Circuit for detecting output current of frequency converter in real time | |
| CN114325548A (en) | Transmission delay calibration method and system for direct-current electronic current transformer | |
| JPS61292067A (en) | Method for measuring electric energy | |
| CN213986796U (en) | Digital torque detection circuit | |
| JPH0648282B2 (en) | Electronic electricity meter | |
| Apse-Apsitis et al. | Bidirectional DC/AC energy flow measurement | |
| CN103267587A (en) | Calculation method of temperature of rotor winding of large-size water-turbine generator set | |
| CN109921616B (en) | Buck converter inductance energy storage and output energy ratio measuring and displaying circuit | |
| CN202351348U (en) | Intelligent monitoring instrument of transformer | |
| CN201311452Y (en) | High-voltage direct measurer | |
| CN110687348B (en) | Electric energy metering device and electric energy metering method | |
| CN218272492U (en) | Direct current electric energy meter suitable for medium and low voltage alternating current-direct current distribution network | |
| CN207801882U (en) | Signal detection and modulate circuit | |
| CN204649825U (en) | Based on the high speed true effective value rectifying system of FPGA | |
| CN101615501B (en) | Voltage and current integral sampling device | |
| CN207096322U (en) | Power supply sample circuit and its low-voltage circuit breaker based on single electric current transformer | |
| CN114019222B (en) | Half-wave detection method for high-precision measurement of residual current | |
| CN113872429B (en) | PFC converter output capacitance value and harmonic monitoring device and method | |
| CN218567469U (en) | Three-phase four-wire electric energy metering circuit and electric energy meter | |
| CN204666706U (en) | A kind of Resistive Current of Metal Oxide Surge Arrester extraction element |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220323 Address after: 325000 Zhangbao Industrial Zone, Linlong village, Oubei Town, Yongjia County, Wenzhou City, Zhejiang Province Patentee after: ZHEJIANG SINPOUS MEASUREMENT AND CONTROL TECHNOLOGY Co.,Ltd. Address before: 100023 101-301, 3rd floor, building 52, courtyard 17, Jingsheng South 4th Street, Tongzhou District, Beijing Patentee before: Beijing Qibing Intelligent Technology Co.,Ltd. |
|
| TR01 | Transfer of patent right |