CN204241141U - A kind of digital quantity test circuit for torque sensor - Google Patents
A kind of digital quantity test circuit for torque sensor Download PDFInfo
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- CN204241141U CN204241141U CN201420677713.7U CN201420677713U CN204241141U CN 204241141 U CN204241141 U CN 204241141U CN 201420677713 U CN201420677713 U CN 201420677713U CN 204241141 U CN204241141 U CN 204241141U
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Abstract
The utility model relates to torque sensor technology field, specifically a kind of digital quantity test circuit for torque sensor.For a digital quantity test circuit for torque sensor, comprise MCU, torque sensor, power module, communication circuit module, communication circuit module.Compared with the existing technology, the digital measurement trial signal decoding interface circuit of the torque sensor of design, achieve the acquisition and processing of the digital quantity signal to torque sensor, and based on the SPC agreement of SAE7126, digital signal is decoded, circuit volume is little, be convenient to lay, owing to instead of the torque sensor of traditional simulating signal formula, therefore EMC better effects if, signal stabilization is high, be not vulnerable to the impact of periphery electromagnetic environment, relative to traditional analog torque sensor, do not need to carry out AD conversion process to signal, thus eliminate sampling error, improve sampling precision.
Description
Technical field
The utility model relates to torque sensor technology field, specifically a kind of digital quantity test circuit for torque sensor.
Background technology
The EPS(Electric Power Steering of automobile) steering gear is the automobile assisted power steering system of a kind of advanced person.It includes power supply, driver element, steering column, intermediate shaft and manual steering gear five parts.ECU, according to the signal of torque sensor and rotary angle transmitter, and in conjunction with signals such as the speed of a motor vehicle, thus determines the size and Orientation of power steering, and the operation of drive motor assisted diversion.In domestic many EPS products, adopt the torque sensor of outputting analog signal, this signal stabilization is not high, is easily subject to the interference of periphery electromagnetic environment, affects power-assisted feel time serious.
Summary of the invention
The utility model is for overcoming the deficiencies in the prior art, the digital measurement trial signal decoding interface circuit of the torque sensor of design, achieve the acquisition and processing of the digital quantity signal to torque sensor, and based on the SPC agreement of SAE7126, digital signal is decoded, circuit volume is little, be convenient to lay, owing to instead of the torque sensor of traditional simulating signal formula, therefore EMC better effects if, signal stabilization is high, be not vulnerable to the impact of periphery electromagnetic environment, relative to traditional analog torque sensor, do not need to carry out AD conversion process to signal, thus eliminate sampling error, improve sampling precision.
For achieving the above object, design a kind of digital quantity test circuit for torque sensor, comprise MCU, torque sensor, power module, communication circuit module, communication circuit module, it is characterized in that: described power module comprises power source reverse connection protection circuit, power-switching circuit and power light circuit; Described communication circuit module is SENT telecommunication circuit; Described communication circuit module is CAN communication circuit; Power end connects the input end of power source reverse connection protection circuit, and the output terminal of power source reverse connection protection circuit connects the input end of power-switching circuit, and the output terminal of power-switching circuit connects the input end of power light circuit; The signal input part of described SENT telecommunication circuit and INDEX signal conditioning circuit connects torque sensor, and the signal output part of SENT telecommunication circuit and INDEX signal conditioning circuit connects MCU; The input end of CAN communication circuit connects+5V power supply, and the output terminal of CAN communication circuit connects MCU.
Described INDEX signal conditioning circuit comprises voltage stabilizing diode, resistance, electric capacity, amplifier, the reverse input end difference contact resistance one of amplifier and one end of resistance two, and the other end of resistance one connects+5V power supply, the other end ground connection of resistance two; One end of the contact resistance of input end in the same way three of amplifier, the other end of resistance three connects the median signal end of electric capacity one, one end of resistance four, the negative electrode of Transient Suppression Diode one and torque sensor respectively, the other end ground connection of electric capacity one and resistance four, the plus earth of Transient Suppression Diode one; One end of the output terminal contact resistance five of amplifier and an IO port of MCU, the other end of resistance five connects+5V power supply; The positive power source terminal of amplifier connects+5V power supply, the negative power end ground connection of amplifier.
Described SENT telecommunication circuit comprises jumper wire device, electric capacity, voltage stabilizing diode, triode, and jumper wire device one is provided with three ports, and first port connects 3.3V power supply; 3rd port connects+5V power supply; One end of second port contact resistance seven, one end of the other end difference contact resistance 11 of resistance seven, one end of electric capacity two, the negative electrode of voltage stabilizing diode one, the collector of triode, one end of resistance eight; The other end of resistance 11 connects the SENTB signal pins of torque sensor, the other end ground connection of electric capacity two, the plus earth of voltage stabilizing diode one, the grounded emitter of triode, the base stage difference contact resistance nine of triode and one end of resistance ten, the other end of resistance ten connects the 2nd IO end of MCU, the other end ground connection of resistance nine; The other end of resistance eight connects one end of electric capacity three and one end of resistance six respectively, the other end ground connection of electric capacity three, the 3rd IO end of the other end of resistance six one end of contact resistance 12, one end of electric capacity four and MCU respectively, the other end ground connection of resistance 12, the other end ground connection of electric capacity four.
Described power source reverse connection protection circuit comprises diode, and the anode of diode one connects 12V power supply, and the negative electrode of diode connects 12V power supply.
Described power-switching circuit comprises power supply chip, electric capacity, and the Vin end of power supply chip connects one end of electric capacity five, one end of electric capacity six and 12V power supply, the other end ground connection of electric capacity five and electric capacity six respectively; The GND of power supply chip holds ground connection; The Vout end of power supply chip connects one end of electric capacity seven, one end of electric capacity eight and+5V power supply, the other end ground connection of electric capacity seven and electric capacity eight respectively.
Described power light circuit comprises light emitting diode, resistance, the plus earth of light emitting diode one, one end of the anode contact resistance 13 of light emitting diode one, and the other end of resistance 13 connects+5V power supply; The plus earth of light emitting diode two, one end of the anode contact resistance 14 of light emitting diode two, the other end of resistance 14 connects 12V power supply.
Described CAN communication circuit comprises communication chip, common mode inductance, Transient Suppression Diode, electric capacity, jumper wire device, jumper wire device two is provided with three ports, the CANH end of communication chip connects 3 pin of common mode inductance, the CANL end of communication chip connects 4 pin of common mode inductance, 2 pin of common mode inductance connect one end of electric capacity nine, 2 pin of Transient Suppression Diode two, the second port of jumper wire device two respectively, the other end ground connection of electric capacity nine; 1 pin of common mode inductance connects one end of electric capacity ten, 1 pin of Transient Suppression Diode two, one end of resistance 15 respectively, the other end ground connection of electric capacity ten, 3 pin ground connection of Transient Suppression Diode two, the 3rd port of the other end tie jumper device two of resistance 15; The S end of described communication chip connects the 4th IO end of MCU, the transmission pin of the CAN of the TXD end connection MCU of communication chip, and the GND of communication chip holds ground connection, and the VCC end of communication chip connects+5V power supply, and the CAN of the RXD end connection MCU of communication chip receives pin; One end of electric capacity 11 connects+5V power supply, the other end ground connection of electric capacity 11.
The model of described MCU is the microcontroller of μ 70F3506.
The model of described torque sensor is the torque sensor of TLE4998C.
The utility model compared with the existing technology, the digital measurement trial signal decoding interface circuit of the torque sensor of design, achieve the acquisition and processing of the digital quantity signal to torque sensor, and based on the SPC agreement of SAE7126, digital signal is decoded, circuit volume is little, be convenient to lay, owing to instead of the torque sensor of traditional simulating signal formula, therefore EMC better effects if, signal stabilization is high, be not vulnerable to the impact of periphery electromagnetic environment, relative to traditional analog torque sensor, do not need to carry out AD conversion process to signal, thus eliminate sampling error, improve sampling precision.
Based on the SPC agreement of SAE7126, reliability is high, and transmission speed is fast, for this reliability of EPS and the exigent product of response speed very important.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Fig. 2 is INDEX signal conditioning circuit schematic diagram.
Fig. 3 is SENT telecommunication circuit schematic diagram.
Fig. 4 is power source reverse connection protection circuit schematic diagram.
Fig. 5 is power-switching circuit schematic diagram.
Fig. 6 is power light circuit theory diagrams.
Fig. 7 is CAN communication circuit schematic diagram.
Embodiment
With reference to the accompanying drawings the utility model is described further below.
As shown in Figure 1, power module comprises power source reverse connection protection circuit, power-switching circuit and power light circuit; Described communication circuit module is SENT telecommunication circuit; Described communication circuit module is CAN communication circuit; Power end connects the input end of power source reverse connection protection circuit, and the output terminal of power source reverse connection protection circuit connects the input end of power-switching circuit, and the output terminal of power-switching circuit connects the input end of power light circuit; The signal input part of described SENT telecommunication circuit and INDEX signal conditioning circuit connects torque sensor, and the signal output part of SENT telecommunication circuit and INDEX signal conditioning circuit connects MCU; The input end of CAN communication circuit connects+5V power supply, and the output terminal of CAN communication circuit connects MCU, CAN one end and connects MCU, and the connector of an other termination DB9, for external diagnostic device.
Shown in Fig. 2, INDEX signal conditioning circuit comprises voltage stabilizing diode, resistance, electric capacity, amplifier, one end of reverse input end difference contact resistance one R1 and resistance two R2 of amplifier U1, the other end of resistance one R1 connects+5V power supply, the other end ground connection of resistance two R2; One end of the contact resistance three of the input end in the same way R3 of amplifier U1, the other end of resistance three R3 connects electric capacity one C1, one end of resistance four R4, the negative electrode of Transient Suppression Diode one D1 and the median signal end of torque sensor respectively, INDEX is the median signal of torque sensor in electric steering gear, be used for determining the centre position of bearing circle, the other end ground connection of electric capacity one C1 and resistance four R4, the plus earth of Transient Suppression Diode one D1; One end of output terminal contact resistance five R5 of amplifier U1 and an IO port of MCU, MC_INDEX is that the MCP6002 of amplifier U1 sends, and sends to MCU, and the other end of resistance five R5 connects+5V power supply; The positive power source terminal of amplifier U1 connects+5V power supply, the negative power end ground connection of amplifier U1.
The INDEX signal exported due to the chip of DTIS inside is current signal, therefore needs to be nursed one's health as voltage signal, so that MCU identifies.Selected the operational amplifier that Microchip Technology produces in signal conditioning circuit, model is MCP6002.INDEX current signal, after resistance four R4, is converted to voltage signal, and modulate circuit adopts and singly limits comparator circuit, and INDEX signal input part employs Transient Suppression Diode one D1 and does overvoltage protection.The magnitude of voltage of the inverting input of amplifier is used for making reference voltage, INDEX signal compares with the reference potential of inverting input, if in-phase end input voltage is higher than reference voltage, output terminal exports high level, if in-phase end input voltage is less than reference voltage, output terminal output low level.
As shown in Figure 3, SENT telecommunication circuit comprises jumper wire device, electric capacity, voltage stabilizing diode, triode, and jumper wire device one P6 is provided with three ports, and first port connects 3.3V power supply; 3rd port connects+5V power supply, and pull-up resistor R7 can be selected to meet 3.3V or 5V; One end of second port contact resistance seven R7, one end of other end difference contact resistance 11 R11 of resistance seven R7, one end of electric capacity two C2, the negative electrode of voltage stabilizing diode one D2, the collector of triode Q1, one end of resistance eight R8; The other end of resistance 11 R11 connects the SENTB signal pins of torque sensor, the other end ground connection of electric capacity two C2, the plus earth of voltage stabilizing diode one D2, the grounded emitter of triode Q1, one end of base stage difference contact resistance nine R9 and resistance ten R10 of triode Q1, the other end of resistance ten R10 connects the 2nd IO end of MCU, the other end ground connection of resistance nine R9; The other end of resistance eight R8 connects one end of electric capacity three C3 and one end of resistance six R6 respectively, the other end ground connection of electric capacity three C3, the 3rd IO end of the other end of resistance six R6 one end of contact resistance 12 R12, one end of electric capacity four C4 and MCU respectively, the other end ground connection of resistance 12 R12, the other end ground connection of electric capacity four C4.
The agreement of the design proposal S/C communication of this circuit is closely related, and first MCU sends Master Trigger signal with the natural frequency of 1KHz to DTIS, after DTIS replys this signal, sends digital quantity SENT signal.Detailed process is MCU pin, sends SYNC signal, and when this signal is high level, triode Q1 conducting, due to triode Q1 conducting, now DTIS detects low level and starts response, to MCU transmission of digital amount signal.Using the circuit theory on this road of SENT_A as explanation, SENT_B loop circuit is consistent with SENT_A circuit.Jumper wire device one P6 can select 5V pull-up power supply, also can select 3.3V pull-up power supply, and the signal output due to DTIS is that the open collector of triode Q1 exports, so must increase pull-up resistor and pull-up power supply.Resistance 11 R11 mono-can protect aspect the IO port of MCU, also can form a RC filtering circuit with electric capacity two C2.Voltage stabilizing diode one D2 is used for doing the esd protection of signal wire.Resistance six R6 and electric capacity three C3 form RC filtering circuit, are used for eliminating the noise of sensor side signal.The BC847 of the NPN type that triode Q1 selects, collaborative MCU decide trigger circuit.Resistance nine R9 ensures that triode Q1 is when not main triggering, to the state of a MCU safety.Resistance ten R10 is triode Q1 base resistance, can limit triode Q1 base current.
As shown in Figure 4, power source reverse connection protection circuit comprises diode, and the anode of diode one D3 connects 12V power supply, and the negative electrode of diode D3 connects 12V power supply.
As shown in Figure 5, power-switching circuit comprises power supply chip, electric capacity, and the Vin end of power supply chip U2 connects one end of electric capacity five C5, one end of electric capacity six C6 and 12V power supply, the other end ground connection of electric capacity five C5 and electric capacity six C6 respectively; The GND of power supply chip U2 holds ground connection; The Vout end of power supply chip U2 connects one end of electric capacity seven C7, one end of electric capacity eight C8 and+5V power supply, the other end ground connection of electric capacity seven C7 and electric capacity eight C8 respectively.
As shown in Figure 6, power light circuit comprises light emitting diode, resistance, the plus earth of light emitting diode one D4, one end of anode contact resistance 13 R13 of light emitting diode one D4, and the other end of resistance 13 R13 connects+5V power supply; The plus earth of light emitting diode two D5, one end of anode contact resistance 14 R14 of light emitting diode two D5, the other end of resistance 14 R14 connects 12V power supply.
The operating voltage of CAN communication circuit and DTIS inside chip is all 5V.That power supply chip U2 adopts is low dropout voltage regulator AMS1117-5.0, and stable output 5V, its inner integrated overheating protection and current-limiting protection, can provide maximum current 1100mA.In order to ensure the stability that AMS1117-5.0 exports, link electric capacity six C6 of a 22uF/35V at output terminal.In order to absorb the voltage fluctuation of battery side, add electric capacity eight C8 of a 22uF/10V at the input end of power supply chip U2.Utilize diode one D3 to realize reverse power connection defencive function, add light emitting diode one D4 and light emitting diode two D5 two LED indicate as power supply.
As shown in Figure 7, CAN communication circuit comprises communication chip, common mode inductance, Transient Suppression Diode, electric capacity, jumper wire device, jumper wire device two P3 is provided with three ports, jumper wire device two P3 is used for selecting whether connect 120 Ohmages, when connection pin2 with pin3 is then connected 120 ohm, otherwise be exactly do not connect, the CANH end of communication chip U3 connects 3 pin of common mode inductance L1, the CANL end of communication chip U3 connects 4 pin of common mode inductance L1, 2 pin of common mode inductance L1 connect one end of electric capacity nine C9 respectively, 2 pin of Transient Suppression Diode two D6, second port of jumper wire device two P3, the other end ground connection of electric capacity nine C9, 1 pin of common mode inductance L1 connects one end of electric capacity ten C10,1 pin of Transient Suppression Diode two D6, one end of resistance 15 R15 respectively, the other end ground connection of electric capacity ten C10, the 3 pin ground connection of Transient Suppression Diode two D6, the 3rd port of other end tie jumper device two P3 of resistance 15 R15, the S end of described communication chip U3 connects the 4th IO end of MCU, the TXD end of communication chip U3 connects the transmission pin of the CAN of MCU, the GND of communication chip U3 holds ground connection, and the VCC end of communication chip U3 connects+5V power supply, and the CAN of the RXD end connection MCU of communication chip U3 receives pin, one end of electric capacity 11 C11 connects+5V power supply, the other end ground connection of electric capacity 11 C11.
The external plug-in component of DB9 is connected, by the external diagnostic device of DB9 by CAN transceiver TJA1051T output CAN_H with CAN_L.
What select in design be the model of NXP company is that the chip of TJA1051T is as CAN communication chip U3.Communication chip U3 communication speed is the highest can reach 1Mbuad, and has less electromagnetic radiation and higher anti-electromagnetic interference capability.In order to improve stability in circuit real work and antijamming capability, in circuit design, add common mode inductance L1 and Transient Suppression Diode two D6.Common mode inductance L1 is used for the common mode interference in erasure signal transmitting procedure, and Transient Suppression Diode two D6 is used for doing esd protection function.P5 can select whether use 120 ohm termination resistance according to the actual requirements.
Claims (9)
1. the digital quantity test circuit for torque sensor, comprise MCU, torque sensor, power module, communication circuit module, communication circuit module, it is characterized in that: described power module comprises power source reverse connection protection circuit, power-switching circuit and power light circuit; Described communication circuit module is SENT telecommunication circuit; Described communication circuit module is CAN communication circuit; Power end connects the input end of power source reverse connection protection circuit, and the output terminal of power source reverse connection protection circuit connects the input end of power-switching circuit, and the output terminal of power-switching circuit connects the input end of power light circuit; The signal input part of described SENT telecommunication circuit and INDEX signal conditioning circuit connects torque sensor, and the signal output part of SENT telecommunication circuit and INDEX signal conditioning circuit connects MCU; The input end of CAN communication circuit connects+5V power supply, and the output terminal of CAN communication circuit connects MCU.
2. a kind of digital quantity test circuit for torque sensor according to claim 1, it is characterized in that: described INDEX signal conditioning circuit comprises voltage stabilizing diode, resistance, electric capacity, amplifier, reverse input end difference contact resistance one (R1) of amplifier (U1) and one end of resistance two (R2), the other end of resistance one (R1) connects+5V power supply, the other end ground connection of resistance two (R2); One end of the contact resistance of input end in the same way three (R3) of amplifier (U1), the other end of resistance three (R3) connects electric capacity one (C1), one end of resistance four (R4), the negative electrode of Transient Suppression Diode one (D1) and the median signal end of torque sensor respectively, the other end ground connection of electric capacity one (C1) and resistance four (R4), the plus earth of Transient Suppression Diode one (D1); One end of the output terminal contact resistance five (R5) of amplifier (U1) and an IO port of MCU, the other end of resistance five (R5) connects+5V power supply; The positive power source terminal of amplifier (U1) connects+5V power supply, the negative power end ground connection of amplifier (U1).
3. a kind of digital quantity test circuit for torque sensor according to claim 1, it is characterized in that: described SENT telecommunication circuit comprises jumper wire device, electric capacity, voltage stabilizing diode, triode, jumper wire device one (P6) is provided with three ports, and first port connects 3.3V power supply; 3rd port connects+5V power supply; One end of second port contact resistance seven (R7), one end of other end difference contact resistance 11 (R11) of resistance seven (R7), one end of electric capacity two (C2), the negative electrode of voltage stabilizing diode one (D2), the collector of triode (Q1), one end of resistance eight (R8); The other end of resistance 11 (R11) connects the SENTB signal pins of torque sensor, the other end ground connection of electric capacity two (C2), the plus earth of voltage stabilizing diode one (D2), the grounded emitter of triode (Q1), base stage difference contact resistance nine (R9) of triode (Q1) and one end of resistance ten (R10), the other end of resistance ten (R10) connects the 2nd IO end of MCU, the other end ground connection of resistance nine (R9); The other end of resistance eight (R8) connects one end of electric capacity three (C3) and one end of resistance six (R6) respectively, the other end ground connection of electric capacity three (C3), the 3rd IO end of the other end of resistance six (R6) one end of contact resistance 12 (R12), one end of electric capacity four (C4) and MCU respectively, the other end ground connection of resistance 12 (R12), the other end ground connection of electric capacity four (C4).
4. a kind of digital quantity test circuit for torque sensor according to claim 1; it is characterized in that: described power source reverse connection protection circuit comprises diode; the anode of diode one (D3) connects 12V power supply, and the negative electrode of diode (D3) connects 12V power supply.
5. a kind of digital quantity test circuit for torque sensor according to claim 1, it is characterized in that: described power-switching circuit comprises power supply chip, electric capacity, the Vin end of power supply chip (U2) connects one end of electric capacity five (C5), one end of electric capacity six (C6) and 12V power supply, the other end ground connection of electric capacity five (C5) and electric capacity six (C6) respectively; The GND of power supply chip (U2) holds ground connection; The Vout end of power supply chip (U2) connects one end of electric capacity seven (C7), one end of electric capacity eight (C8) and+5V power supply, the other end ground connection of electric capacity seven (C7) and electric capacity eight (C8) respectively.
6. a kind of digital quantity test circuit for torque sensor according to claim 1, it is characterized in that: described power light circuit comprises light emitting diode, resistance, the plus earth of light emitting diode one (D4), one end of the anode contact resistance 13 (R13) of light emitting diode one (D4), the other end of resistance 13 (R13) connects+5V power supply; The plus earth of light emitting diode two (D5), one end of the anode contact resistance 14 (R14) of light emitting diode two (D5), the other end of resistance 14 (R14) connects 12V power supply.
7. a kind of digital quantity test circuit for torque sensor according to claim 1, it is characterized in that: described CAN communication circuit comprises communication chip, common mode inductance, Transient Suppression Diode, electric capacity, jumper wire device, jumper wire device two (P3) is provided with three ports, the CANH end of communication chip (U3) connects 3 pin of common mode inductance (L1), the CANL end of communication chip (U3) connects 4 pin of common mode inductance (L1), 2 pin of common mode inductance (L1) connect one end of electric capacity nine (C9) respectively, 2 pin of Transient Suppression Diode two (D6), second port of jumper wire device two (P3), the other end ground connection of electric capacity nine (C9), 1 pin of common mode inductance (L1) connects one end of electric capacity ten (C10), 1 pin of Transient Suppression Diode two (D6), one end of resistance 15 (R15) respectively, the other end ground connection of electric capacity ten (C10), 3 pin ground connection of Transient Suppression Diode two (D6), the 3rd port of the other end tie jumper device two (P3) of resistance 15 (R15), the S end of described communication chip (U3) connects the 4th IO end of MCU, the TXD end of communication chip (U3) connects the transmission pin of the CAN of MCU, the GND of communication chip (U3) holds ground connection, the VCC end of communication chip (U3) connects+5V power supply, and the RXD end of communication chip (U3) connects the CAN reception pin of MCU, one end of electric capacity 11 (C11) connects+5V power supply, the other end ground connection of electric capacity 11 (C11).
8. a kind of digital quantity test circuit for torque sensor according to claim 1, is characterized in that: the model of described MCU is the microcontroller of μ 70F3506.
9. a kind of digital quantity test circuit for torque sensor according to claim 1, is characterized in that: the model of described torque sensor is the torque sensor of TLE4998C.
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CN201420677713.7U CN204241141U (en) | 2014-11-13 | 2014-11-13 | A kind of digital quantity test circuit for torque sensor |
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CN201420677713.7U CN204241141U (en) | 2014-11-13 | 2014-11-13 | A kind of digital quantity test circuit for torque sensor |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109917697A (en) * | 2017-12-13 | 2019-06-21 | 浙江万马新能源有限公司 | The channel CAN expanded circuit and its control method based on SPI interface |
CN112946387A (en) * | 2021-01-29 | 2021-06-11 | 中国重汽集团济南动力有限公司 | Automatic calibration system for whole vehicle engine |
-
2014
- 2014-11-13 CN CN201420677713.7U patent/CN204241141U/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109917697A (en) * | 2017-12-13 | 2019-06-21 | 浙江万马新能源有限公司 | The channel CAN expanded circuit and its control method based on SPI interface |
CN112946387A (en) * | 2021-01-29 | 2021-06-11 | 中国重汽集团济南动力有限公司 | Automatic calibration system for whole vehicle engine |
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Address after: 201821 Shanghai Jiading District City Yongsheng Road No. 2001 Patentee after: BOSCH HUAYU STEERING SYSTEMS Co.,Ltd. Address before: 201821 Shanghai Jiading District City Yongsheng Road No. 2001 Patentee before: ZF SHANGHAI STEERING SYSTEMS Co.,Ltd. |
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Granted publication date: 20150401 Termination date: 20211113 |
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