TWI813325B - Analog test board for a sensor - Google Patents

Abstract

An analog test board for sensors is used to test the signal transmission status of a plurality of sensors, and the analog test board includes a plurality of test ports, an analog device, and a communication port. The test ports are correspondingly coupled to the control device of the sensors, and the analog device is coupled to the test ports. The analog device provides a plurality of analog signals to the test ports correspondingly, so that the control device correspondingly provides a plurality of transmission signals based on the analog signals. The communication port is coupled to the test ports and a management device, and the control device communicates with the management device through the communication port, so that the management device obtains the signal transmission status of the control device. Wherein the analog signals are the signal received by the analog sensors during actual operation.

Description

Sensor simulation test device

The invention relates to a simulation test device, and in particular to a sensor simulation test device.

Sensors such as temperature, liquid level, and flow usually have functional outputs for wired or wireless communication. They are usually tested by connecting multiple sensors on a single host for system integration programming. This method will limit the programmer to a simple sequential communication test. It cannot simulate the synchronous communication of multiple gateways or the actual testing of various functions such as communication speed format and lock code during design. It often happens that after the program design is completed, problems are discovered when it is actually used on site, and the program must be modified or rewritten to meet the current needs.

In terms of product sales demand, when customers need to do system function testing, most customers cannot purchase multiple units at one time for connection testing, and can only use prototypes for simple testing. It was only when I purchased multiple gateways to synchronize communication or communication speed formats and lock codes that I discovered that the system could not operate normally. At this time, both the manufacturer and the customer begin to develop solutions, which results in a waste of communication time between the two parties, or the system is abandoned due to the inability to connect and communicate. In more serious cases, communication errors cause irreparable losses.

To test the connection function of traditional sensors, multiple finished products must be produced, and then connected one by one to test the connection in sequence. If there are problems, all must be disassembled and the circuits or programs must be re-modified, causing a loss of time or materials. Waste. The present invention designs a simulation test device for sensors to ensure that the control device of each sensor is actually operated after actual installation to avoid signal transmission conditions. The situation where a problem occurs and must be investigated one by one is a major topic that the creator of this case wants to study.

In order to solve the above problems, the present invention provides a simulation test device for a sensor to overcome the problems of the conventional technology. Therefore, the simulation test device of the present invention is used to test the signal transmission conditions of a plurality of sensors, and includes a plurality of test ports, simulation devices, communication ports and power modules. The plurality of test ports are correspondingly coupled to the control device of the sensor. The analog device is coupled to the test port and provides a plurality of analog signals to the corresponding test port, so that the control device accordingly provides a plurality of transmission signals based on the analog signals. The communication port couples the test port and the management device, and the control device communicates with the management device through the communication port, so that the management device knows the signal transmission status of the control device. The power module is used to power the analog test device, and is selectively powered by a battery or an external power supply. Among them, the analog signal is the signal received by the analog sensor during actual operation.

In one embodiment, the simulation test device further includes an expansion port. The expansion port is used to couple to a communication port of another simulation test device to form a serial simulation test system with the management equipment.

In one embodiment, the simulation test device further includes an encryption and decryption device. The encryption and decryption device is coupled to the test port and encrypts/decrypts the transmission signal and the signal provided by the management device. The encryption and decryption device uses non-clear code as the encryption/decryption device. , and encryption/decryption is selected from at least one of HEX hexadecimal code, Harsh Function, symmetric key and asymmetric key.

In one embodiment, the simulation test device further includes a plurality of controllable switches. The controllable switches are coupled to the test port, and can selectively predefine the coupling relationship between the test port and the communication port to turn on or off. Wherein, the switch is selected from at least one of a relay, a transistor, and a coaxial switch.

In one embodiment, the sensor is a wired sensor, and the control device of the sensor is coupled to the test port through a wired connection; or the sensor is a wireless sensor, and the sensor The control device of the detector is coupled to the test port through wireless transmission; alternatively, the sensor is a wired sensor or a wireless sensor.

In one embodiment, the control device of the sensor is used to sense the condition of the material flow, and the simulation signal provided by the simulation device simulates the flow rate of the material flow, the total flow rate of the material flow, and/or the direction of the material flow, And the material flow is simulated through pulse wave signals of specific frequencies; the material flow can be the flow of solid particles, liquid or gas.

In one embodiment, the control device of the sensor is used to sense the status of the material inventory, and the simulation device includes a plurality of simulation modules, and the simulation modules are coupled to the test ports accordingly to provide simulation signals to corresponding test port.

In one embodiment, each analog module includes a capacitor bank, and the capacitor bank includes a plurality of capacitor control modules. Each capacitor control module is coupled to each other in parallel and includes a series-connected capacitor and switch. Among them, each simulation module controls whether the switch of the capacitance control module is turned on or not to adjust the capacitance value, so as to simulate the material level signal of the material inventory through the change of the capacitance value.

In one embodiment, each analog module includes a plurality of temperature sensors and a plurality of heaters, the plurality of temperature sensors are coupled to each other in series, and the plurality of heaters are coupled to each other in series. Among them, each simulation module controls the heating of the heater, and affects the ambient temperature around the temperature sensor through the heating of the heater. The temperature sensors respectively sense the surrounding ambient temperature and simulate the temperature signal of the material inventory.

In one embodiment, each analog module includes a plurality of humidity sensors, and the plurality of humidity sensors are coupled to each other in series. Among them, each simulation module simulates the humidity signal of the material inventory by adjusting the humidity parameter value of the humidity sensor.

The main purpose and effect of the present invention is to pre-test the signal transmission status between each control device and the management equipment by providing analog signals through the simulation test device, so as to ensure that the control device of each sensor can perform properly during actual installation and operation. Avoid having to troubleshoot one by one due to signal transmission problems.

In order to further understand the technology, means and effects adopted by the present invention to achieve the intended purpose, please refer to the following detailed description and drawings of the present invention. It is believed that the purpose, features and characteristics of the present invention can be understood in depth and For specific understanding, however, the attached drawings are only for reference and illustration, and are not intended to limit the present invention.

100:Simulation test device

1. 1-1~1-N: Control device

12: Sensing line

122: Sensing unit

2-1~2-N: Test port

3:Simulation device

321~32N: Simulation module

34: Capacitor bank

C: capacitor

SW: switch

36:Temperature sensor

38:Heater

40:Humidity sensor

42: Second controllable switch

44:Expansion module

4: Communication port

5: Expansion port

6: Encryption and decryption device

7:Power module

72:Battery

74:Converter

200:Manage equipment

300:Material inventory

302:Material

Sa1~SaN: analog signal

St1~StN: transmission signal

SW1~SWN: the first controllable switch

Vin: external power supply

Figure 1 is a circuit block diagram of an analog test device for a sensor of the present invention; Figure 2 is a circuit block diagram of a first embodiment of an analog test device for a sensor of the present invention; Figure 3 is a circuit block diagram of an analog test device for a sensor of the present invention. A circuit block diagram of the second embodiment; and FIG. 4 is a schematic diagram of a sensor configuration for material inventory according to the present invention.

The technical content and detailed description of the present invention are as follows with reference to the drawings: Please refer to FIG. 1 which is a circuit block diagram of an analog test device of the sensor of the present invention. The sensor simulation test device 100 is coupled to the management device 200 and is used to test signal transmission conditions between a plurality of sensors and the management device 200 . Specifically, the simulation test device 100 includes a plurality of test ports 2-1 to 2-8, a simulation device 3 and a communication port 4. The test ports 2-1~2-8 are respectively coupled to the control devices 1-1~1-8 of the sensor, and the simulation device 3 is coupled to the test ports 2-1~2-8. The analog device 3 provides a plurality of analog signals Sa1~Sa8 to the corresponding test ports 2-1~2-8, so that the control devices 1-1~1-8 provide a plurality of transmission signals accordingly based on the received analog signals Sa1~Sa8. St1~St8 to the test ports 2-1~2-8 to conduct simulation tests on the sensor control devices 1-1~1-8. The communication port 4 couples each test port 2-1 to 2-8 and the management device 200, and the control devices 1-1 to 1-8 communicate with each other through the communication port 4 to learn about the management device 200 and the control device 200. Signal transmission status between devices 1-1~1-8. Among them, the signal transmission status refers to the connection transmission quality between the management equipment 200 and the control devices 1-1~1-8, the accuracy of the numerical transmission between the two parties, and whether there are program errors in the process of mutual transmission between the two programs. Vulnerabilities (BUGs) and other conditions.

Taking the sensor as a flow rate sensor as an example, the flow rate sensor (i.e. flow meter) usually includes pipelines, wheels and control devices. In the actual operation of the flow rate sensor, when the water flows through the pipeline and drives the water wheel, the control device can usually learn the flow rate and direction of the water flow through sensing, and transmit the flow rate and direction to the gateway. (Gateway) and other back-end equipment. In actual operation, the flow velocity sensor is usually configured, for example but not limited to, on the top floor of each building, and is connected to a remote gateway or management device 200 in a wired or wireless manner. However, in the actual system configuration, the connection transmission quality of the management device 200 and the control devices 1-1 to 1-8 must be tested one by one when each flow rate sensor is installed, and even after the test is completed, it cannot be connected to the management device. 200 After transferring data to each other, when the entire system is operating, additional transmission problems will occur because the entire system is operating at the same time. For example, but not limited to, the entire system is paralyzed because the transmitted packet is too large, or the data transmission is crowded. these Problems will not occur until the entire system is running, and then you have to go to the installation location of the machine to check them one by one, causing a lot of inconvenience.

Among them, the control devices 1-1~1-8 of the sensor are used to sense the status of the material flow, and the simulation signals Sa1~Sa8 provided by the simulation device 3 are to simulate the flow rate of the material flow, the total flow rate of the material flow and/ Or the direction of material flow, and simulate the material flow through, for example, but not limited to, pulse wave signals of specific frequencies. Material flow can be the flow of solid particles, liquids or gases. Therefore, the main purpose and effect of the present invention is to pre-test the signal transmission status between each control device 1-1 to 1-8 and the management device 200 by providing analog signals Sa1 to Sa8 through the simulation test device 100 to ensure that each During the actual operation of the control devices 1-1~1-8 of each sensor after actual installation, it is necessary to avoid troubleshooting one by one due to problems in signal transmission conditions. Among them, taking the above-mentioned sensor as a flow velocity sensor as an example, the analog signals Sa1 to Sa8 provided by the simulation device 3 can simulate the signals received by the flow velocity sensor during actual operation, that is, the received signals can A signal corresponding to the velocity or direction of water flow.

Referring again to FIG. 1 , the simulation test device 100 further includes an expansion port 5 , and the expansion port 5 is used to couple to the communication port 4 of another simulation test device 100 to form a serial simulation test system with the management device 200 . Preferably, the simulation test device 100 may include, for example but not limited to, 8 groups of test ports 2-1~2-8, and each group of test ports 2-1~2-8 may be coupled to a control device 1-1~1- 8. Usually, in a small sensing system (such as but not limited to a single building), sensors are usually configured in less than 8 groups, and a single group of simulation test devices 100 can be used to complete the pre-test of the small sensing system. However, in a relatively large sensing system (such as but not limited to the entire factory), the sensors are usually configured in more than 8 groups. Therefore, the expansion port 5 is used to connect another analog test device 100 in series to expand to more than 8 groups. Control devices 1-1~1-8 are used to test this system.

On the other hand, the simulation test device 100 also includes a plurality of first controllable switches SW1 ~ SW8 , and the on/off of the first controllable switches SW1 ~ SW8 can be controlled manually or by the management device 200 . The first controllable switches SW1~SW8 are coupled to the test ports 2-1~2-8, and selectively turn on or off the coupling relationship between the test ports 2-1~2-8 and the communication port 4. Specifically, when some of the test ports 2-1 to 2-8 of the simulation test device 100 are not coupled to the control devices 1-1 to 1-8, or a certain control device 1-1 to 1-8 fails, Or when you want to exclude testing a certain control device 1-1 to 1-8, you can turn off the corresponding first controllable switches SW1 to SW8 manually or controlled by the management device 200 to avoid testing on the simulation test device 100. During the test of the signal transmission condition, it is affected by these test ports 2-1~2-8 (for example, but not limited to, possible mistransmission of signals, or transmission of wrong signals, etc.).

In addition, the simulation test device 100 may also include an encryption and decryption device 6 . The encryption and decryption device 6 is coupled to the test ports 2-1 to 2-8, and provides an encryption/decryption conversion mechanism of a specific data transmission format to perform encryption conversion before the transmission signals St1 to St8 are provided to the communication port 4, and in the management When the device 200 provides a signal to the control devices 1-1 to 1-8, the signal is decrypted and converted. Among them, the encryption and decryption device 6 can be configured in each test port 2-1 to 2-8 (ie, multiple decryption devices 6), in addition to being configured in the position shown in Figure 1. In addition, the encryption and decryption device 6 uses non-clear code as the encryption/decryption, and the encryption/decryption can be selected from at least one of HEX hexadecimal code, Harsh Function, symmetric key and asymmetric key. The encryption and decryption device 6 mainly responds to the special data transmission format requirements of each manufacturer to prevent the data transmitted by the system set up by each manufacturer from being stolen during the actual operation of the sensor and management device 200 . Therefore, the encryption/decryption conversion status of the sensor and the management device 200 can be tested in advance through the encryption and decryption device 6 .

Furthermore, the analog test device 100 may also include a power module 7 for powering the analog test device 100 . The power module 7 may include a battery 72 for power supply or an external power supply Vin, and Optionally, when the external power supply Vin is used for power supply, the converter 74 can be used to convert the external power supply Vin into appropriate power. Since the simulation test device 100 of the present invention can be powered by the battery 72, it is not limited by the power distribution of the test site. As long as a suitable placement location is found, the simulation test of the control devices 1-1 to 1-8 can be started.

It is worth mentioning that in one embodiment of the present invention, the sensors used by the control devices 1-1 to 1-8 can be wired sensors or wireless sensors. When the control devices 1-1~1-8 are used in wired sensors, the control devices 1-1~1-8 are coupled to the test ports 2-1~2-8 through wired connections. When the control devices 1-1~1-8 are used in wireless sensors, the control devices 1-1~1-8 are coupled to the test ports 2-1~2-8 through wireless transmission. Similarly, the test ports 2-1 to 2-8 can also be coupled to the management device 200 through wired or wireless methods, which can be selected based on user needs.

Please refer to FIG. 2 which is a circuit block diagram of the first embodiment of the analog test device of the sensor of the present invention. Please refer to FIG. 1 in conjunction. In the embodiment of FIG. 2 , the sensor is used to sense the status of the water flow, and the control devices 1-1 to 1-8 of the sensor are used to receive signals corresponding to the flow velocity and the direction of the water flow. Specifically, the simulation device 3 includes a plurality of simulation modules 321 to 328. The analog modules 321 ~ 328 are respectively coupled to the test ports 2-1 ~ 2-8 to provide the analog signals Sa1 ~ Sa8 to the corresponding test ports 2-1 ~ 2-8 respectively. Therefore, the simulation modules 321 ~ 328 of the simulation device 3 respectively provide simulation signals Sa1 ~ Sa8 to the test ports 2-1 ~ 2-8, and the simulation signals Sa1 ~ Sa8 simulate the flow rate and/or direction of the water flow. Taking the flow rate of water as an example, the simulation modules 321 to 328 simulate the flow rate of water through pulse wave signals of specific frequencies (ie, analog signals Sa1 to Sa8). After receiving the pulse signal of a specific frequency, the control devices 1-1~1-8 respectively provide transmission signals St1~St8 to the test ports 2-1~2-8 based on this pulse signal, so as to pass the test ports 2-1~ The path from 2-8 to communication port 4 provides transmission signals St1~St8 to the management device 200 to learn the signal transmission status between the test ports 2-1~2-8 and the management device 200. Therefore, the control devices 1-1~1-8 pass The communication port 4 communicates with the management device 200 and can learn the signal transmission status between the management device 200 and the control devices 1-1 to 1-8.

Please refer to FIG. 3 for a circuit block diagram of a second embodiment of an analog test device for a sensor according to the present invention. Please refer to FIG. 1 for details. In the embodiment of FIG. 3 , the sensor is used to sense the status of the material inventory, and the control devices 1 - 1 ~ 1 -N of the sensor are used to receive signals corresponding to the material inventory status. Sensors used for material inventory are shown in Figure 4. The material inventory 300 can be equipped with a single or multiple multi-functional composite sensors to sense the status of the material 302. The multi-functional composite sensor usually includes a control device 1 and a sensing circuit 12 . The sensing circuit 12 includes a plurality of sensing units 122 . Each sensing unit 122 can sense the temperature and humidity of the material inventory, and can also sense the material level of the material inventory through linear changes in physical quantities. The simulation modules 321~32N mainly provide signals that simulate the temperature, humidity and material level of the material inventory to test the signal transmission status of the control devices 1-1~1-N of the multi-function composite sensor. It is worth mentioning that in one embodiment of the present invention, the remaining components not shown in Figure 3 or components not further described are the same as Figure 2 and will not be described again.

Specifically, each analog module 321~32N includes a capacitor group 34. Each capacitor group 34 is coupled to each test port 2-1~2-N accordingly, and includes a plurality of capacitor control modules. Each capacitor control module is coupled to each other in parallel and includes a series-connected capacitor C and a switch SW. Each simulation module 321~32N controls whether the switch SW of the capacitance control module is turned on or not to adjust the capacitance value, so as to provide material level signals Sa1~SaN of the simulated material inventory 300 through changes in the capacitance value. (i.e. analog signal)

Each analog module 321 ~ 32N may also include a plurality of temperature sensors 36 and a plurality of heaters 38 . Each temperature sensor 36 is coupled to each other in series, and the serially connected head ends are coupled to each of them accordingly. Test ports 2-1~2-N. Each heater 38 is also coupled to each other in series, and the head end of the series connection is coupled to each test port 2-1~2-N accordingly. Each simulation module 321~32N controls the heater 38 to heat, and is transparent The heating by the superheater 38 affects the ambient temperature around the temperature sensor 36 . The temperature sensors 36 respectively sense the surrounding ambient temperature and provide temperature signals Sa1 to SaN (ie, analog signals) that simulate the material inventory 300 . The number of heaters 38 may be different from the number of temperature sensors 36 . However, in actual testing, in order to simulate the temperature of the material inventory 300 more accurately, it is a better implementation to design the number of heaters 38 to be the same as the number of temperature sensors 36 and to arrange them in parallel accordingly.

Each analog module 321~32N may also include a plurality of humidity sensors 40. Each humidity sensor 40 is coupled to each other in series, and the head end of the series connection is correspondingly coupled to each test port 2-1~ 2-N. Each simulation module 321 ~ 32N provides humidity signals Sa1 ~ SaN (i.e., analog signals) of the simulated material inventory 300 by adjusting the humidity parameter value of the humidity sensor 40 . Specifically, the humidity parameter value can be a resistance value or a capacitance value. The adjustment of the resistance value (or capacitance value) can simulate the humidity. Therefore, the humidity signal Sa1~ that simulates the material inventory 300 can be provided by changing the resistance value or capacitance value. SaN. The humidity of materials at the bottom and top of the material inventory 300 is usually different. Therefore, in actual testing, two humidity sensors 40 can usually be used to simulate the humidity at the bottom and top of the material inventory 300 . However, the simulation modules 321 to 32N may also include two or more humidity sensors 40 to simulate humidity changes between the bottom and the top of the material inventory 300 . Therefore, in summary, the analog signals Sa1 ~ SaN can represent at least one of the material level signal, temperature signal, humidity signal, etc.

Each analog module 321~32N may also include a plurality of second controllable switches 42, and each second controllable switch 42 is connected in series to the temperature sensor string 36, the heater string 38 and the humidity sensor respectively. 40 strings of serial terminals, and selectively turn on or off the coupling of the 36 strings of temperature sensors, 38 strings of heaters and 40 strings of humidity sensors to the test ports 2-1~2-N relation. When there is no need to perform a simulated test of temperature, humidity or material level, the corresponding second controllable switch 42 can be turned off manually or controlled by the management device 200 (the material level can be simulated by turning off all switches SW ) to avoid molding When the test device 100 tests the signal transmission conditions, it is affected by these test ports 2-1~2-N (for example, but not limited to, possible mistransmission of signals, or transmission of wrong signals, etc.). Among them, the first controllable switches SW1 to SW8 and the second controllable switch 42 can be a combination of conventional relay (Relay) output control, transistor (PNP/NPN) output control, coaxial switch (SPDT/DPDT) control, etc. .

It is worth mentioning that in one embodiment of the present invention, each simulation module 321~32N may also include an expansion module 44. Specifically, since in practical applications, the material inventory 300 may be large or small, and its height may be different, the length of the sensing line 12 may also be different, and the included sensing unit 122 may also be different. Therefore, the number of the capacitor group 34 , the temperature sensor 36 , the heater 38 and the humidity sensor 40 can be expanded through the expansion module 44 to adjust the number of the above components according to the different lengths of the sensing lines 12 .

All in all, this creation uses the concept of a public board to design similar functional circuits on an analog test device 100 at the same time. Depending on the complexity of the circuit design, 6, 8 or more can be integrated on one board. When users need to connect multiple devices, they only need one board or a combination of multiple boards to test various connection functions at the same time (such as but not limited to, RS-485, 232 or 4G, 5G, NBIoT and other multi-machine integration system communication connection). Therefore, this kind of integrated system can be applied to integrated building water meters, various functional design tests, industrial 4.0 precision machining machines, program simulation tests of some instrumentation and control integrated systems, storage temperature monitoring, etc., using hundreds of sensor communication programs Design tests. Greatly shorten product development time and improve product quality.

If manufacturers need to provide products to customers for testing, they only need to provide customers with public boards for connection testing. If the functions meet the customer's needs, the purchase can be made. This avoids the previous situation of purchasing a large number of products for connection testing and inconvenient communication between the two parties when problems arise. Therefore, the simulation test device 100 of the present invention is functional, innovative and novel for the research and development testing of various industrial automation programs.

However, the above are only detailed descriptions and drawings of preferred embodiments of the present invention. However, the characteristics of the present invention are not limited thereto and are not used to limit the present invention. The entire scope of the present invention should be applied in the following terms The patent scope shall prevail. All embodiments that are within the spirit of the patentable scope of the present invention and similar modified embodiments shall be included in the scope of the present invention. Anyone familiar with the art can easily think of it in the field of the present invention. Changes or modifications may be covered by the following patent scope of this case.

100:Simulation test device

1-1~1-8: Control device

2-1~2-8: Test port

3:Simulation device

4: Communication port

5: Expansion port

6: Encryption and decryption device

7:Power module

72:Battery

74:Converter

200:Manage equipment

Sa1~SaN: analog signal

St1~StN: transmission signal

SW1~SWN: the first controllable switch

Vin: external power supply

Claims (9)

A simulation test device for sensors, used to test a signal transmission condition of a plurality of sensors, including: a plurality of test ports, correspondingly coupled to a control device of the sensors; a simulation device, coupled The test ports provide a plurality of analog signals to the corresponding test ports, so that the control devices provide a plurality of transmission signals accordingly based on the analog signals; a communication port couples the test ports and a management device, And the control devices communicate with each other through the communication port and the management equipment, so that the management equipment knows the signal transmission status of the control devices; a power module is used to power the simulation test device, and selectively Battery power supply or external power supply; and a plurality of controllable switches, coupled to the test ports, and selectively predefined to turn on or off the coupling relationship between the test ports and the communication port; wherein, the analog signals It simulates the signals received by the sensors during actual operation, and the switches are selected from at least one of relays, transistors, and coaxial switches. The simulation test device of claim 1 further includes: an expansion port for coupling to the communication port of another simulation test device to form a serial simulation test system with the management equipment. The simulation test device as described in claim 1 further includes: an encryption and decryption device, coupled to the test ports, and encrypting/decrypting the transmission signals and the signals provided by the management equipment; the encryption and decryption device non-clear code is used as the encryption/decryption, and the encryption Encryption/decryption is selected from at least one of HEX hexadecimal code, Harsh Function, symmetric key and asymmetric key. The analog test device of claim 1, wherein the sensors are wired sensors, and the control devices of the sensors are coupled to the test ports through wired connections; or, the These sensors are wireless sensors, and the control devices of these sensors are coupled to the test ports through wireless transmission; alternatively, these sensors are wired sensors or wireless sensors. type sensor. The simulation test device as described in claim 1, wherein the control devices of the sensors are used to sense a material flow condition, and the simulation signals provided by the simulation device simulate the flow rate of the material flow, the flow rate of the material flow, and the flow rate of the material flow. The total flow rate of the material flow and/or the direction of the material flow, and the material flow is simulated through a pulse wave signal of a specific frequency; the material flow can be the flow of solid particles, liquid or gas. The simulation test device of claim 1, wherein the control devices of the sensors are used to sense the status of material inventory, and the simulation device includes: a plurality of simulation modules, coupled to the test ports accordingly, To provide the analog signals to corresponding test ports respectively. The simulation test device of claim 6, wherein each simulation module includes: a capacitor group, including: a plurality of capacitor control modules, each capacitor control module is coupled to each other in parallel, and includes a capacitor in series and a switch; wherein, each simulation module controls whether the switches of the capacitance control modules are turned on or not to adjust the capacitance value, so as to simulate the material level signal of the material inventory through the change of the capacitance value. The simulation test device of claim 6, wherein each simulation module includes: a plurality of temperature sensors coupled to each other in series; and a plurality of heaters coupled to each other in series; wherein each simulation module The system controls the heating of the heaters, and affects the ambient temperature around the temperature sensors through the heating of the heaters. The temperature sensors respectively sense the surrounding ambient temperature and simulate the temperature signal of the material inventory. . The simulation test device as described in claim 6, wherein each simulation module includes: a plurality of humidity sensors, which are coupled to each other in series; wherein each simulation module adjusts the humidity of the humidity sensors. Parameter value to simulate the humidity signal of material inventory.

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