CN210426826U - Multi-channel high-temperature sensor resistance and temperature detection equipment based on multiple communications - Google Patents
Multi-channel high-temperature sensor resistance and temperature detection equipment based on multiple communications Download PDFInfo
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- CN210426826U CN210426826U CN201921917890.7U CN201921917890U CN210426826U CN 210426826 U CN210426826 U CN 210426826U CN 201921917890 U CN201921917890 U CN 201921917890U CN 210426826 U CN210426826 U CN 210426826U
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Abstract
The utility model discloses a multi-channel high-temperature sensor resistance and temperature detection device based on multiple communications, which comprises a power module, an AD sampling module, a control unit and a communication unit; the control unit comprises two control modules for data interaction through SPI interfaces, the output end of the power module is respectively connected with the power input ends of the two control modules, the AD sampling module and the communication unit, the output end of the AD sampling module is respectively connected with the input ends of the two control modules, and the two control modules are interconnected with the communication unit. The utility model discloses can detect multichannel high temperature sensor for the test time of high temperature sensor in the production test, improved detection speed, this check out test set still has multiple communication mode simultaneously, can dock the matching communication with different production facility, has satisfied the inspection requirement of different production occasions.
Description
Technical Field
The utility model relates to a sensor detects technical field in the engine.
Background
With the implementation of various national emission regulations, the emission requirements of engines are higher and higher, and many engine manufacturers also carry out technical model selection again to meet the emission requirements.
In an automobile engine, a high-temperature sensor is used for detecting the temperature of smoke in an exhaust funnel in a high-temperature severe environment, and the temperature value plays a crucial role in the process of monitoring the running state of an automobile, so that the quality of the high-temperature sensor is particularly important. After the high-temperature sensor is produced, the product needs to be subjected to performance testing, and the high-temperature sensor can be delivered from a factory and installed after the product is qualified, so that how to efficiently detect the high-temperature sensor product is one of the problems to be solved for improving the production efficiency. However, the existing detection equipment is low in efficiency, can only detect a high-temperature sensor within 6 paths, and is single in communication mode, and only one communication mode is available.
Disclosure of Invention
The utility model discloses the technical problem that needs to solve provides a check out test set of multichannel high temperature sensor resistance and temperature based on multiple communication, can detect multichannel high temperature sensor, improves detection speed, improves work efficiency.
In order to solve the technical problem, the utility model adopts the following technical proposal.
The multi-channel high-temperature sensor resistance and temperature detection equipment based on multiple communications comprises a power module for providing power, an AD sampling module for collecting output signals of the high-temperature sensors, a control unit for comparing and judging the collected signals and a communication unit for sending data to an external control center; the control unit comprises two control modules for data interaction through SPI interfaces, the output end of the power module is respectively connected with the power input ends of the two control modules, the AD sampling module and the communication unit, the output end of the AD sampling module is respectively connected with the input ends of the two control modules, and the two control modules are interconnected with the communication unit.
Above-mentioned check out test set of multichannel high temperature sensor resistance and temperature based on multiple communication, power module is including the filter circuit that is used for the filtering, the power signal of telecommunication sampling circuit that is used for sample mains voltage and be used for detecting the LDO chip that whether power chip worked in normal range, and the input of power signal of telecommunication sampling circuit is connected to filter circuit's output, and the input of LDO chip is connected to power signal of telecommunication sampling circuit's output, and control module's power input end is connected to the output of LDO chip.
Above-mentioned check out test set of multichannel high temperature sensor resistance and temperature based on multiple communication, power module still includes the protection circuit who is used for preventing electric current, voltage and PMOS transposition, and protection circuit's input is connected at the output of LDO chip.
Above-mentioned check out test set of multichannel high temperature sensor resistance and temperature based on multiple communication, AD sampling module includes that the sampling resistor who is used for providing sampling voltage, the reference resistance who is used for providing reference voltage and the first electric capacity and the second electric capacity that are used for the filtering are connected through the wire annular, connects the output of awaiting measuring high temperature sensor through the wire between sampling resistor and the reference resistance, passes through the input of wire connection control module between reference resistor and the first electric capacity, wire ground connection between first electric capacity and the second electric capacity.
Above-mentioned check out test set of multichannel high temperature sensor resistance and temperature based on multiple communication, control module is including the filtering circuit who is arranged in the filtering power harmonic composition, the singlechip that is arranged in the signal processing and the crystal oscillator that is used for providing clock signal for the singlechip, and power module's output is connected to filtering circuit's input, and the input of singlechip is connected to filtering circuit's output, and the clock end at the singlechip is connected at the both ends of crystal oscillator.
Above-mentioned check out test set of multichannel high temperature sensor resistance and temperature based on multiple communication, the communication unit is including being used for carrying out data transmission to outside control center's CAN communication module, the RS232 communication module that is used for carrying out communication interconnection with production line equipment and the RS485 communication module that is used for carrying out data communication with remote terminal, and CAN communication module, RS232 communication module and RS485 communication module's input and two control module are interconnected.
Due to the adoption of the technical scheme, the utility model has the following technical progress.
The utility model discloses can detect multichannel high temperature sensor for the test time of high temperature sensor in the production test, improved detection speed, this check out test set still has multiple communication mode simultaneously, can dock the matching communication with different production facility, has satisfied the inspection requirement of different production occasions.
Drawings
FIG. 1 is a block diagram of the present invention;
fig. 2 is a circuit diagram of a power module according to the present invention;
fig. 3 is a circuit diagram of the AD sampling module according to the present invention;
fig. 4 is a circuit diagram of a control module according to the present invention;
fig. 5 is a circuit diagram of the CAN communication module according to the present invention;
fig. 6 is a circuit diagram of an RS232 communication module according to the present invention;
fig. 7 is a circuit diagram of the RS485 communication module of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The structural block diagram of the multi-channel high-temperature sensor resistance and temperature detection equipment based on various communications is shown in fig. 1 and comprises a power supply module, an AD sampling module, a control unit and a communication unit. The power module is used for providing the power, and AD sampling module is used for gathering high temperature sensor's output signal, and the control unit is used for carrying out the comparison judgement with the signal of gathering, and the communication unit is used for sending data for external control center. The output end of the power supply module is respectively connected with the power supply input ends of the control unit, the AD sampling module and the communication unit, the output end of the AD sampling module is connected with the input end of the control unit, and the control unit is interconnected with the communication unit.
The power supply module comprises a filter circuit, a power supply electric signal sampling circuit, an LDO chip and a protection circuit. Filter circuit is used for the filtering, and the power signal of telecommunication sampling circuit is used for sampling mains voltage, the LDO chip is used for detecting whether power chip works in normal range, and protection circuit is used for preventing electric current, voltage and PMOS are connect conversely, power signal of telecommunication sampling circuit's input is connected to filter circuit's output, the input of LDO chip is connected to power signal of telecommunication sampling circuit's output, the output of LDO chip is connected respectively with protection circuit, control module's power input end.
The utility model provides a power module's circuit diagram is shown in fig. 2, and power module's main chip adopts the LDO chip that can export the 5V power, is used for the power supply of control unit, AD sampling module and communication unit, and filter circuit and power signal of telecommunication sampling circuit's output signal offer the LDO chip to handle, is used for detecting whether power chip works in normal range.
The AD sampling module comprises a sampling resistor, a reference resistor, a first capacitor and a second capacitor. The sampling resistor is used for providing sampling voltage, the reference resistor is used for providing reference voltage, the first capacitor and the second capacitor are used for filtering, the sampling resistor, the reference resistor, the first capacitor and the second capacitor are connected in an annular mode through a wire, the sampling resistor and the reference resistor are connected through a wire to the output end of a high-temperature sensor to be tested, the reference resistor and the first capacitor are connected through a wire to the input end of the control module, and the wire between the first capacitor and the second capacitor is grounded.
The utility model provides a circuit diagram of AD sampling module is shown in fig. 3, wherein sampling resistor is R65, reference resistance is R61, first electric capacity is C45, the second electric capacity is C47, 1K omega resistance is chooseed for use to reference resistance R61 resistance, establish ties the partial pressure with the sampling resistor who is detected the sensor and form the return circuit, of course, reference resistance's resistance can carry out corresponding change according to the actual resistance value scope that is detected the product in order to satisfy better voltage detection scope. The AD sampling module utilizes the principle of voltage division of a reference resistor and a sampling resistor in a circuit to enable the control module to acquire a corresponding voltage value.
The control unit is used for comparing and judging the signals collected by the AD sampling module and the standard values, and comprises two control modules which are connected through an SPI (serial peripheral interface), and the two control modules carry out data interaction through the SPI. Two control modules utilize the SPI communication mode to connect, can satisfy the AD sampling port that reaches 32 at most to the cascaded communication mode of SPI can be more nimble carry out the interchange between the data.
The control module comprises a filter circuit, a singlechip and a crystal oscillator. The filter circuit is used for filtering harmonic components in the power supply, the single chip microcomputer is used for processing signals collected by the AD collection module, the crystal oscillator is used for providing clock signals for the single chip microcomputer, the input end of the filter circuit is connected with the output end of the power supply module, the output end of the filter circuit is connected with the input end of the single chip microcomputer, and two ends of the crystal oscillator are connected to the clock end of the single chip microcomputer.
The utility model discloses well control module' S circuit diagram is shown in FIG. 4, and the singlechip adopts the MC9S08DZ60 of freescale to two control module adopt two MC9S08DZ60 singlechips among this check out test set, and both cascade through the SPI communication, can be in the acquisition process, and the singlechip is inside to be interacted, handles the collection of some special occasions, and realizes more complicated changeable function. And after the single chip microcomputer receives the voltage value transmitted by the AD acquisition module, the resistance value and the temperature value of the high-temperature sensor are calculated, and data are sent out through the communication unit.
The communication unit comprises a CAN communication module, an RS232 communication module and an RS485 communication module. The CAN communication module is used for sending data to an external control center, the RS232 communication module is used for realizing communication interconnection with production line equipment, the RS485 communication module is used for carrying out data communication with a remote terminal, and the input ends of the CAN communication module, the RS232 communication module and the RS485 communication module are interconnected with the two control modules.
The CAN communication module is used for sending data to an upper computer of an external control center for direct display, a circuit diagram of the CAN communication module is shown in fig. 5, a main chip of the CAN communication module is a TJA1050CAN transceiver, the TJA1050 has excellent output symmetry, even under the condition that a common-mode coil is not added, the common-mode interference resistance is strong, an error signal CAN be cut off quickly when a bus is in error, normal communication is guaranteed, and the CAN communication module is widely applied to automobile electronic communication.
The utility model provides a circuit diagram of RS232 communication module is shown in FIG. 6, and RS232 communication module's main chip is MAX232, and production facility's communication end is connected on RS-232 binding post, realizes carrying out the communication interconnection with production line equipment.
The utility model discloses well RS485 communication module's circuit diagram is shown in FIG. 7, and RS485 communication module's main chip is MAX485, and wherein 11 feet and 12 feet of singlechip in control module are connected to 1 foot and 4 feet, and the singlechip passes through 11 feet and 12 feet and gives MAX485 chip with data transfer, realizes remote terminal's communication interconnection and can carry out data monitoring through remote terminal to the product in the test in the production.
When the high-temperature sensor is detected, the detection equipment is connected with a power supply, the outside of the detection equipment is connected with the high-temperature sensor and is connected with a computer upper computer of a control center through a CAN bus; after the power-on, the detection equipment starts to collect the voltage value under the partial pressure of the sampling resistor, and then carries out proportional calculation on the collected voltage value and the reference resistor 1K, so that the current resistance value of the high-temperature sensor is obtained, then the current corresponding temperature is obtained by looking up a table according to the known temperature resistance corresponding table of the high-temperature sensor, and the resistance value and the temperature data are sent to an upper computer of a control center through the CAN communication module by the single chip microcomputer to be directly displayed. The detection equipment can send the detected resistance value and temperature data to corresponding production equipment through the RS232 communication module, or carry out data interaction. The detection equipment can remotely send the detected resistance value and temperature data to the remote terminal through the RS485 communication module for remote monitoring.
Claims (6)
1. Multichannel high temperature sensor resistance and check out test set of temperature based on multiple communication, its characterized in that: the device comprises a power module for providing a power supply, an AD sampling module for collecting output signals of the high-temperature sensor, a control unit for comparing and judging the collected signals and a communication unit for sending data to an external control center; the control unit comprises two control modules for data interaction through SPI interfaces, the output end of the power module is respectively connected with the power input ends of the two control modules, the AD sampling module and the communication unit, the output end of the AD sampling module is respectively connected with the input ends of the two control modules, and the two control modules are interconnected with the communication unit.
2. The multi-channel high-temperature sensor resistance and temperature detection device based on multiple communications according to claim 1, wherein: the power module is including the LDO chip that is used for the filter circuit of filtering, is used for sample mains voltage's the signal of telecommunication sampling circuit and is used for detecting whether power chip works at normal within range, and the input of the signal of telecommunication sampling circuit is connected to filter circuit's output, and the input of LDO chip is connected to the signal of telecommunication sampling circuit's output, and the power input of control module is connected to the output of LDO chip.
3. The multi-channel high-temperature sensor resistance and temperature detection device based on multiple communications according to claim 2, wherein: the power module further comprises a protection circuit for preventing current, voltage and PMOS from being reversely connected, and the input end of the protection circuit is connected with the output end of the LDO chip.
4. The multi-channel high-temperature sensor resistance and temperature detection device based on multiple communications according to claim 1, wherein: the AD sampling module comprises a sampling resistor, a reference resistor, a first capacitor and a second capacitor, wherein the sampling resistor is connected with the reference resistor through a wire in an annular mode and is used for providing sampling voltage, the reference resistor is used for providing reference voltage, the first capacitor and the second capacitor are used for filtering, the output end of the high-temperature sensor to be tested is connected between the sampling resistor and the reference resistor through a wire, the reference resistor and the first capacitor are connected with the input end of the control module through a wire, and the wire between the first capacitor and the second capacitor is grounded.
5. The multi-channel high-temperature sensor resistance and temperature detection device based on multiple communications according to claim 1, wherein: the control module comprises a filter circuit for filtering harmonic components in the power supply, a single chip microcomputer for processing signals and a crystal oscillator for providing clock signals for the single chip microcomputer, the input end of the filter circuit is connected with the output end of the power supply module, the output end of the filter circuit is connected with the input end of the single chip microcomputer, and two ends of the crystal oscillator are connected to the clock end of the single chip microcomputer.
6. The multi-channel high-temperature sensor resistance and temperature detection device based on multiple communications according to claim 1, wherein: the communication unit comprises a CAN communication module used for sending data to an external control center, an RS232 communication module used for communicating with production line equipment and an RS485 communication module used for communicating with a remote terminal, and the input ends of the CAN communication module, the RS232 communication module and the RS485 communication module are interconnected with the two control modules.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921917890.7U CN210426826U (en) | 2019-11-08 | 2019-11-08 | Multi-channel high-temperature sensor resistance and temperature detection equipment based on multiple communications |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921917890.7U CN210426826U (en) | 2019-11-08 | 2019-11-08 | Multi-channel high-temperature sensor resistance and temperature detection equipment based on multiple communications |
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| CN210426826U true CN210426826U (en) | 2020-04-28 |
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| CN201921917890.7U Active CN210426826U (en) | 2019-11-08 | 2019-11-08 | Multi-channel high-temperature sensor resistance and temperature detection equipment based on multiple communications |
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