CN218974804U - Display instrument and display system - Google Patents

Abstract

A display and display system, the display comprising: the body is coupled with the signal end of the sampled equipment and is used for collecting and displaying signals output by the signal end; wherein, the body is independently supplied with power by a power terminal independent of the signal terminal during operation. According to the scheme, the signal output by the sampling equipment can be accurately collected, and meanwhile, the interference or loss on the signal is reduced or even eliminated, so that the power consumption limit on the display instrument is reduced, and the number of the display instruments which can be connected on the signal transmission path of the sampling equipment is more flexible.

Description

Display instrument and display system

Technical Field

The utility model relates to the technical field of instrument monitoring, in particular to a display instrument and a display system.

Background

In industrial sites, there is a need to monitor meter output signals in real time. Taking real-time monitoring of the output signal of the gas sensor as an example, the existing commonly adopted instrument monitoring means is to erect a display on the signal line of the gas sensor so as to collect and display 4-20 milliamp (mA) current signals transmitted on the signal line in real time.

However, existing displays can interfere with and consume the sampled signal as it is transmitted over the acquisition signal line. In order to reduce the influence on signals, the existing display generally has very strict low-power consumption requirements, and the number of the displays connected on the signal line is limited.

Disclosure of Invention

The utility model solves the technical problem of realizing signal acquisition on the premise of not causing interference or loss.

In order to solve the above technical problems, an embodiment of the present utility model provides a display apparatus, including: the body is coupled with the signal end of the sampled equipment and is used for collecting and displaying signals output by the signal end; wherein, the body is independently supplied with power by a power terminal independent of the signal terminal during operation.

Optionally, the body includes: the sampling module is coupled with the signal end to collect signals output by the signal end; the signal processing module is coupled with the sampling module and is used for receiving and processing the sampling result of the sampling module; and the display module is coupled with the signal processing module to display the processed sampling result.

Optionally, the body is coupled to a signal line and a power line of the sampled device, the signal line is connected to the signal end, and the power line is connected to the power end.

Optionally, the body includes a signal input end and a signal output end that are respectively connected to the signal line, and a signal transmitted on the signal line flows from the signal input end into the sampling module and then flows from the signal output end along the signal line.

Optionally, the sampled device includes a gas sensor, and the sampling module includes: the first signal sampling unit is used for collecting a first signal output by the signal end, and the first signal comprises a gas detection result of the gas sensor; the second signal sampling unit is used for collecting a second signal output by the signal end, and the second signal comprises equipment information of the gas sensor.

Optionally, the first signal is a current signal, the second signal is a modulation signal, and the signal processing module includes an analog-to-digital conversion unit, configured to convert a sampling result output by the first signal sampling unit from an analog signal to a digital signal.

Optionally, the body further includes: the indication unit is coupled with the signal processing module and is used for adjusting the working state according to a first instruction, and the first instruction is generated and sent by the signal processing module at least according to the processed sampling result.

Optionally, the body further includes: the relay output array is coupled with the signal processing module and comprises a plurality of relay output ends, the relay output ends are used for being connected with external execution mechanisms, the relay output array is used for controlling the corresponding external execution mechanisms to switch working states according to second instructions, and the second instructions are generated and sent by the signal processing module according to the processed sampling results.

Optionally, the display device further includes: the sensing module is coupled with the signal processing module and is used for generating a sensing signal according to a sensing result of approaching or separating a human body from the body, and the signal processing module controls at least one component of the body to switch between a working state and a dormant state according to the sensing signal.

Optionally, the display device further includes: the wireless transmission module is arranged on the body and coupled with the power supply end, and the body is in wireless communication with the outside through the wireless transmission module and/or receives control instructions.

Optionally, the body receives and forwards communication data of other display devices through the wireless transmission module.

Optionally, the sampled device comprises a gas sensor.

In order to solve the above technical problem, an embodiment of the present utility model further provides a display system, including: and the plurality of the display instruments are respectively connected to different positions of the signal wire of the sampled equipment, and the signal wire is connected with the signal end.

Compared with the prior art, the technical scheme of the embodiment of the utility model has the following beneficial effects:

An embodiment of the present utility model provides a display apparatus including: the body is coupled with the signal end of the sampled equipment and is used for collecting and displaying signals output by the signal end; wherein, the body is independently supplied with power by a power terminal independent of the signal terminal during operation.

Compared with the prior art, the display device can realize power supply and sampling simultaneously through the signal wire, and the display device of the embodiment can supply power through the power end and sample through the signal end, so that the interference or loss to the signal can be reduced or even eliminated while the signal output by the sampling device is accurately collected, the power consumption limitation to the display device can be reduced, and the number of the display devices which can be connected on the signal transmission path of the sampling device is more flexible. In particular, the display may be considered as a signal line serially coupled to the device being sampled, and the components within the display are powered by a power source terminal independent of the signal line.

Further, the display may be coupled to a signal line and a power line of the sampled device, respectively. The voltage drop generated when the signal on the signal line flows through the display instrument is not used for supplying power to the subsequent circuit, and the signal on the signal line can be equivalent to the output from the constant current source for the display instrument, so that the signal is not lost or disturbed by the acquisition action of the display instrument on the signal transmitted on the signal line. Further, independent power supply is realized through the power line, so that the display can be added with functional components at will without being limited by low power consumption requirements.

The embodiment of the utility model also provides a display system, which comprises: the plurality of display instruments are respectively connected to different positions of the signal wire of the sampled equipment, and the signal wire is connected with the signal end.

The display employed in this embodiment is designed to be independently powered without significant voltage drop or loss across the signal loop of the sampled device. Therefore, a plurality of displays can be used in series, so that the requirement of multi-point detection of the output signals of the sampled equipment on the industrial site can be met.

Drawings

FIG. 1 is a block diagram of a first display according to an embodiment of the present utility model;

FIG. 2 is a block diagram of a second display according to an embodiment of the present utility model;

fig. 3 is a schematic diagram of a display system according to an embodiment of the utility model.

Detailed Description

As described in the background art, existing displays can interfere with and consume sampled signals when they collect signals transmitted on signal lines.

The inventor of the application finds that one of the reasons for the problems is that the existing display adopts a signal loop to supply power, namely, the display is only connected to a signal wire of the instrument, and the power supply and the sampling are simultaneously realized through the signal wire. Since the signal lines are sampled and simultaneously supply power to the components within the display, interference and loss are caused to the signals transmitted on the signal lines. The larger the power consumption of the components of the display and the larger the number of the components, the larger the influence on the signal. Thus, the existing display has very high requirements on low power consumption, and the limitation of power consumption causes the existing display to basically have only simple display functions and cannot integrate more expansion functions.

In addition, the more the displays connected to the signal line, the greater the influence on the signal due to the power supply to each display. Thus, existing industrial sites also have a number of limitations in the placement of displays, such as typically connecting only one display to a signal line. This obviously cannot meet the requirement of the output signals of the industrial field multipoint monitoring instrument, for example, when the industrial field area is large, the display arrangement mode with limited quantity cannot meet the application requirement of users to view the display nearby as required.

In order to solve the above technical problem, the present disclosure provides a display, including: the body is coupled with the signal end of the sampled equipment and is used for collecting and displaying signals output by the signal end; wherein, the body is independently supplied with power by a power terminal independent of the signal terminal during operation.

Therefore, the display device of the embodiment supplies power through the power supply end and samples through the signal end, so that the signal output by the sampled device can be accurately collected, and meanwhile, the interference or loss on the signal is reduced or even eliminated, the power consumption limit on the display device is reduced, and the number of the display devices which can be connected on the signal transmission path of the sampled device is more flexible. In particular, the display may be considered as a signal line serially coupled to the device being sampled, and the components within the display are powered by a power source terminal independent of the signal line.

Further, the display may be coupled to a signal line and a power line of the sampled device, respectively. The voltage drop generated when the signal on the signal line flows through the display instrument is not used for supplying power to the subsequent circuit, and the signal on the signal line can be equivalent to the output from the constant current source for the display instrument, so that the signal is not lost or disturbed by the acquisition action of the display instrument on the signal transmitted on the signal line. Further, independent power supply is realized through the power line, so that the display can be added with functional components at will without being limited by low power consumption requirements.

In order to make the above objects, features and advantages of the present utility model more comprehensible, embodiments accompanied with figures are described in detail below.

Fig. 1 is a block diagram of a first display 1 according to an embodiment of the present utility model, and fig. 2 is a block diagram of a second display 1 according to an embodiment of the present utility model.

The embodiment can be applied to the application scene of the output signal of the industrial field real-time monitoring instrument so as to meet the demands of users on monitoring nearby, detecting the output signal of the instrument at multiple points and the like. In particular, the meter in this embodiment that is required to monitor the output signal may also be referred to as the sampled device 2 (as shown in fig. 3). Further, the sampled device 2 may be, for example, a gas sensor, a temperature sensor, a pressure sensor, or the like, which is not limited to the measured physical quantity, and the output signal of the sampled device 2 may be, for example, a current signal. Taking a gas sensor as an example, the output signal of the gas sensor can be a current signal in the range of 4-20mA, and the current signal represents the gas detection result of the gas sensor.

Specifically, referring to the schematic diagram of the display system of the embodiment of the present utility model shown in fig. 3, the sampled device 2 may have a signal line 21 and a power line 22 that are independent, where the signal line 21 is coupled to the signal terminal of the sampled device 2 to transmit the signal generated by the sampled device 2, and the power line 22 is coupled to the power terminal of the sampled device 2 to supply power to the sampled device 2. For example, power line 22 may be connected to a power supply to provide a power supply voltage of 18-30 volts (V) to the sampled device. For example, the signal transmitted on signal line 21 may comprise a 4-20mA current signal.

Further, the sampled device 2 also has a ground line 23, the ground line 23 being adapted to Ground (GND) the sampled device 2. The number of the ground wires 23 may be one, and accordingly, the sampled device 2 may be a three-wire sensor. Alternatively, the number of the ground lines 23 may be two, and accordingly, the sampled device 2 may be a four-wire sensor, one of the two ground lines 23 being the ground line 23 of the signal line 21, and the other of the two ground lines 23 being the ground line 23 of the power supply line 22.

It should be noted that, although the present embodiment is exemplarily described with three-wire and four-wire sensors, it is not limited to these two sensors. In practical applications, the sensors independent of the signal line 21 and the power line 22 can use the display apparatus 1 according to the present embodiment for signal monitoring.

Further, referring to fig. 1 to 3, the display 1 may include a body 10 coupled to a signal line 21 and a power line 22 of the sampled device 2, respectively. The body 10 may be used to collect and display signals transmitted on the signal line 21, with the power supply from the power line 22 during operation of the body 10. Thus, the body is independently powered during operation by a power source terminal independent of the signal line 21, which in this embodiment is also the source of power for the sampled device 2.

For example, the body 10 may include a power input terminal 10a and a power output terminal 10b, wherein the power input terminal 10a is connected to the power line 22 and the power output terminal 10b is connected to the ground line 23. An 18-30V supply voltage on the power cord 22 enters the body 10 via the power input 10a to power the devices of the body 10 a. The body 10 is connected to the ground line 23 through the power output terminal 10b to be grounded GND.

For a four-wire sensor, the power output 10b may be connected to the ground 23 of the power line 22.

Further, the body 10 may include a converter 17, and the voltage supplied from the power supply input terminal 1a is converted by the converter 17 and then supplied to each component in the body 10 to supply power. For example, the inverter 17 may be located between the power input 10a and the signal processing module 12, with other components within the body 10 coupled to the signal processing module 12 and receiving power supply and signal transmission from the signal processing module 12.

The converter 17 may be, for example, a step-down DC/DC converter.

Further, the body 10 may include a sampling module 11 coupled to the signal line 21 to collect signals transmitted on the signal line 21. For example, the body 10 may include a signal input terminal 10c and a signal output terminal 10d connected to the signal line 21, respectively, and a signal transmitted on the signal line 21 flows from the signal input terminal 10c into the sampling module 11 and then flows back to the signal line 21 from the signal output terminal 10 d.

Thus, the display 1 is connected in series to the signal line of the sampled device 2, and the Analog signal (Analog signal) on the signal line 21 is limited to the sampling block 11 located between the signal input terminal 10c and the signal output terminal 10 d. Meanwhile, power supply independent of the signal line 21 is realized through the power line 22.

In one implementation, with continued reference to fig. 1 and 2, the sampling module 11 may include: a sampling resistor 111 located between the signal input terminal 10c and the signal output terminal 10 d; an amplifier 112 coupled to the sampling resistor 111 for amplifying the voltage difference across the sampling resistor 111.

Specifically, after the 4-20mA signal on signal line 21 enters display 1 from signal input 10c, a voltage drop occurs across sampling resistor 111, and then flows out of display 1 from signal output 10d and back onto the signal line for normal transmission.

Further, an amplifier 112 may be connected across the sampling resistor 111 to amplify the voltage drop across the sampling resistor 111. The amplified voltage drop is the sampling result of the sampling module 11.

The amplifier 112 may be, for example, a voltage amplifier.

Based on the present embodiment, the signal on the signal line 21 only flows through the sampling resistor 111, and the voltage drop generated in this process is not used to power the back-end circuit. Thus, the signal on the signal line 21 does not experience significant loss or interference before and after being sampled by the display 1.

Thus, the display 1 can be regarded as being connected in series to the signal line of the sampled device 2, and the components within the display 1 are supplied with power by the power line 22 of the sampled device 2. Since the voltage drop generated when the signal on the signal line 21 flows through the display 1 is only used for sampling, and the signal on the signal line 21 can be equivalent to the output from the constant current source for the display 1, the signal is not lost or disturbed by the acquisition action of the display 1 on the signal transmitted on the signal line 21.

In one implementation, the signal transmitted on signal line 21 may include a first signal, which may be, for example, a current signal to characterize the gas detection result of the gas sensor.

Further, the signal transmitted on the signal line 21 may also include a second signal, which may be, for example, a modulated signal. The modulation signal may include a gas detection result of the gas sensor, and further may further include device information of the gas sensor, such as device attribute information, setting information, fault diagnosis information, maintenance information, and the like of the gas sensor.

The modulated signal may be, for example, an addressable remote transducer highway (Highway Addressable Remote Transducer, HART) signal. The HART signal is a sinusoidal signal superimposed on a 4-20mA current signal, with an amplitude of 0.5mA, which conveys digital information over different frequencies. Therefore, the function of digital transmission is realized through the HART protocol under the condition of not changing the existing 4-20mA wiring.

Further, the sampling resistor 111 and the amplifier 112 may be collectively referred to as a first signal sampling unit. The first signal sampling unit collects a current signal through the sampling resistor 111 to obtain a gas detection result transmitted in the form of an analog signal. For example, a voltage drop across the sampling resistor 111 occurs as the current signal flows through the sampling resistor 111, and the magnitude of the voltage drop may be indicative of the magnitude of the current signal, i.e., the concentration of the ambient gas currently being collected by the gas sensor.

Since the display 1 of the present embodiment adopts independent power supply, the signal loop and the power supply loop in the display 1 are separated and do not affect each other. Thus, the sampling action of the display 1 has no effect on the current signal transmitted on the signal line 21 and on other waveforms superimposed, such as HART signals.

In one implementation, with continued reference to fig. 2, the display 1 shown in fig. 2 differs from the display 1 shown in fig. 1 mainly in that: the sampling module 11 in the display instrument 1 shown in fig. 2 may further comprise a second signal sampling unit for collecting a second signal, such as a modulated signal, transmitted on the signal line 21. Thereby, the displayable content of the display 1 shown in fig. 2 is expanded. For example, in addition to displaying the real-time gas detection result of the gas detector as in the display 1 shown in fig. 1, the display 1 shown in fig. 2 may also display the device information of the gas detector.

Specifically, the second signal sampling unit may include a modem unit 113 for receiving the signal transmitted on the signal line 21 from the signal input terminal 10c and demodulating the signal to obtain a sampling result, and remodulating the demodulated signal and outputting the remodulated signal to the signal output terminal 10d.

The modem unit 113 may be used to collect a modulated signal such as a HART signal superimposed on the signal line 21. Further, the modem unit 113 may be, for example, a HART modem chip.

For example, the modem unit 113 may be integrated in the MCU and directly connected to the signal input terminal 10c and the signal output terminal 10d. The signal transmitted on the signal line 21 is split into two paths at the signal input terminal 10c, one path flows through the sampling resistor 111 to the signal output terminal 10d, and the other path is transmitted to the modem unit 113. The modulation/demodulation unit 113 demodulates the modulated signal in the input signal to obtain a sampling result, and then modulates back the modulated signal and outputs it to the signal output terminal 10d.

In one implementation, with continued reference to fig. 1 and 2, the body 10 may include a signal processing module 12 coupled to the sampling module 11 and configured to receive and process the sampling results of the sampling module 11.

Specifically, the signal processing module 12 may include an analog-to-digital conversion unit 121 for converting the sampling result output by the sampling module 11 from an analog signal to a digital signal to obtain a processed sampling result.

For example, the analog-to-digital conversion unit 121 is coupled to the output end of the amplifier 112 to convert the voltage difference amplified by the amplifier 112 into a digital signal.

The signal processing module 12 may be, for example, a microprocessor (also called micro control unit, microcontroller Unit, MCU for short). In practical applications, the analog-to-digital conversion unit 121 may also be regarded as a part of the sampling module 11 built in the MCU, as shown in fig. 2.

Further, the sampling result processed by the analog-to-digital converter 121 is transmitted to other components in the signal processing module 12, so as to further perform processing such as filtering and logic operation on the sampling result in the form of a digital signal, thereby finally obtaining the sampling result for display. Wherein the filtering process may be used to reject interfering signals in the sampled result.

Alternatively, the filtering process may be performed prior to the analog-to-digital conversion. For example, the sampling result output by the amplifier 121 is filtered by a filter in the MCU, and then is transmitted to the analog-to-digital converter 121 for analog-to-digital conversion.

In one implementation, with continued reference to fig. 1 and 2, the body 10 may include a display module 13 coupled to the signal processing module 12 to display the processed sampling results.

Specifically, the display module 13 may be configured to display the sampling result in the form of a digital signal after a series of processes such as filtering, logic operation, etc. performed by the MCU.

The display module 13 may be, for example, a liquid crystal display (Liquid Crystal Display, LCD for short). For example, the display module 13 may be a liquid crystal display disposed on a surface of the housing 10. The sampling result collected by the sampling module 11 from the signal line 21 is processed by the signal processing module 12 and then displayed on the liquid crystal display screen in real time, so that the real-time reading of the output signal of the sampled device 2 is realized.

Further, the display module 13 may display the state level of the physical quantity currently measured by the sampling device 2 in addition to the specific value of the signal transmitted on the signal line 21 in real time. The state level may be determined by the signal processing module 12 according to a comparison result between the processed sampling result and a preset threshold value.

Taking the sampled device 2 as a gas sensor for example, the current signal transmitted on the signal line 21 can be used to characterize the gas concentration sensed by the gas sensor. The larger the value of the current signal, the larger the corresponding gas concentration and the higher the corresponding state level. The signal processing module 12 may pre-store one or more preset thresholds, with different preset thresholds corresponding to different status levels.

For example, if the value of the current signal currently collected is smaller than the preset threshold 1, it indicates that the current gas concentration is in the normal range, and the signal processing module 12 may control the display module 13 to display that the current gas concentration is in the safe state. For another example, if the value of the current signal currently collected falls within the range of [ preset threshold 1, preset threshold 2 ], which indicates that the current gas concentration is in the abnormal state of the A1 level, the signal processing module 12 may control the display module 13 to display an A1 level alarm. For another example, if the value of the current signal currently collected falls within the range of [ preset threshold 2, preset threshold 3 ], which indicates that the current gas concentration is in the abnormal state of the A2 level, the signal processing module 12 may control the display module 13 to display an A2 level alarm.

Further, the plurality of preset thresholds may be different values in the range of 4mA to 20 mA. In practical applications, the user may adjust specific values of each preset threshold through the human-computer interaction module 16.

If the value of the current signal acquired at present exceeds the range of 4mA to 20mA, the gas sensor may malfunction. At this time, the signal processing module 12 may control the display module 13 to display that it is currently in a fault state.

Further, a General-purpose input/output (GPIO) interface may be used to communicate between the display module 13 and the signal processing module 12. Correspondingly, the processed sampling result is transmitted to the display module 13 in the form of a GPIO signal.

In one implementation, with continued reference to fig. 1 and 2, the body 10 may include an indication unit 14 for adjusting the operating state according to the first instruction. The indication unit 14 may be coupled to the signal processing module 12, where the signal processing module 12 generates a first instruction at least according to the processed sampling result and sends the first instruction to the indication unit 14.

In particular, the indication unit 14 may be switched between a plurality of operating states, different operating states being available for indicating the operating state of the sampled device 2 and/or the state level of the physical quantity measured by the sampled device 2. For example, the operation states of the indicating unit 14 may include an Alarm (Alarm), a Fault (Fault), and a System operation (System work), wherein the Alarm is used to indicate that the physical quantity measured by the sampling device 2 is currently in an abnormal state, such as exceeding the user tolerance level; the fault is used for indicating that the current measured value of the physical quantity measured by the sampled equipment 2 exceeds the measuring range of the sampled equipment 2, and the instrument is suspected to have the fault; the system operates to indicate that the sampled device 2 is in normal operation and that the measured physical quantity is within a normal range.

The indication unit 14 may be, for example, a light-emitting diode (LED). For example, when the working state is an alarm, the LED lights a red light. For another example, when the operating state is a fault, the light emitting diode lights a yellow light. For another example, the light emitting diode lights a green light when the operating state is system operation.

The number of the light emitting diodes may be plural and arranged on the surface of the housing 1 in an array to optimize the user visibility.

The light emitting mode of the light emitting diode may be different in different operating states. For example, the led may be on for a long time when the operating state is system operation. For another example, the light emitting diode may flash at a first frequency when the operating condition is an alarm. For another example, the light emitting diode may flash at the second frequency when the operating condition is a fault. The first frequency and the second frequency may be different.

Further, the signal processing module 12 may compare the processed sampling result with a value of a preset threshold, and generate the first instruction according to the comparison result. Taking the sampled device 2 as a gas sensor for example, the current signal transmitted on the signal line 21 can be used to characterize the gas concentration sensed by the gas sensor. The larger the value of the current signal, the greater the corresponding gas concentration. The signal processing module 12 may pre-store one or more preset thresholds, with different preset thresholds corresponding to different status levels.

For example, if the value of the current signal currently collected is smaller than the preset threshold value 1, the signal processing module 12 sends a first instruction to control the indication unit 14 to light a green light for a long time, which indicates that the current gas concentration is within the normal range. For another example, if the value of the current signal currently collected falls within the range of [ preset threshold 1, preset threshold 2 ], indicating that the current gas concentration is in the abnormal state of the A1 level, the signal processing module 12 may send a first instruction to control the indication unit 14 to switch to light the red light at the first frequency. For another example, if the value of the current signal currently collected falls within the range of [ preset threshold 2, preset threshold 3 ], indicating that the current gas concentration is in the A2 level abnormal state, the signal processing module 12 may send a first instruction to control the indication unit 14 to light the red light at a frequency higher than the first frequency.

If the value of the current signal acquired at present exceeds the range of 4mA to 20mA, the gas sensor may malfunction. At this time, the signal processing module 12 may send a first instruction to control the indication unit 14 to switch to turn on the yellow light.

Further, the indication unit 14 may be coupled with the display module 13 to synchronously present the operation state of the sampled device 2 and/or the state level of the physical quantity measured by the sampled device 2 to the user.

In one implementation, with continued reference to fig. 1 and 2, the body 10 may include a relay output array 15 coupled to the signal processing module 12 to receive the second instruction, and the relay output array 15 may control a corresponding external actuator (not shown) to switch the working state according to the second instruction. Wherein the second instruction may be generated and transmitted by the signal processing module 12 based on the processed sampling result.

In particular, the relay output array 15 may include a plurality of relay outputs 151, wherein each relay output 151 may be configured to interface with an external actuator. The external actuator may be, for example, a valve, a roller shutter door, or the like.

Different relay output terminals 151 correspond to different state levels of the physical quantity measured by the sampling device 2 and/or the working state of the external actuator. For example, referring to fig. 2, the display 1 may include 3 relays to respectively correspond to three status levels of the physical quantity measured by the sampled device 2 and/or the device status of the sampled device 2, such as the markers A1, A2 and Fault in fig. 2 respectively correspond to two-level alarms and one Fault.

Each relay has 3 relay outputs 151 to control the external actuator to be in different operating states, respectively. For example, NC denotes a normally closed end (Normal Close), NO denotes a normally Open end (Normal Open), and COM denotes a Common end (Common). In practical application, for the three relay output terminals 151 corresponding to each state level, the user may connect the external execution mechanism to one terminal of NC and NO as required, where COM is the terminal to which each external execution mechanism needs to be connected.

For example, the relay output array 15 shown in fig. 2 may specifically include 9 relay outputs 151: an A1-level NC terminal (marked as A1 NC in the figure), and controlling the external actuator to be in a normally closed working state under the A1-level alarm; an A1 level COM terminal (labeled A1 COM in the figure), and a public interface of an external execution mechanism under an A1 level alarm; an A1 level NO terminal (labeled A1 NO in the figure), and the A1 level alarm controls the external actuator to be in a normally open working state; an A2-level NC terminal (marked as A2 NC in the figure), and controlling the external actuator to be in a normally closed working state under the A2-level alarm; an A2 level COM terminal (marked as A2 COM in the figure), and a public interface of an external execution mechanism under an A2 level alarm; an A2-level NO terminal (marked as A2 NO in the figure), and the A2-level alarm controls the external actuator to be in a normally open working state; a Fault level NC terminal (marked as a Fault NC in the figure) controls the external actuator to be in a normally closed working state when in Fault; a Fault level COM terminal (marked as a Fault COM in the figure) is externally connected with a public interface of an executing mechanism when in Fault; and a Fault level NO terminal (marked as Fault NO in the figure), and controlling the external actuator to be in a normally open working state when in Fault.

Further, the signal processing module 12 may generate the second instruction according to a comparison result between the processed sampling result and a preset threshold value. Different numerical ranges of the sampling result may correspond to different relay output terminals 151, and the signal processing module 12 may send the generated second instruction to the relay output terminal 151 corresponding to the preset threshold interval in which the specific numerical value of the sampling result falls, so as to control the external execution mechanism connected to the relay output terminal 151 to switch the working state.

Further, the relay output array 15 and the indication unit 14 may be linked with the display module 13, so as to control the external actuator to perform corresponding actions while displaying the operation state of the sampled device 2 and/or the state level of the physical quantity measured by the sampled device 2 to the user.

Taking the sampled device 2 as a gas sensor for example, it is assumed that the external actuator comprises a valve connected to the corresponding relay output terminals 151 of A1 NC and A1 COM and a rolling shutter connected to the corresponding relay output terminals 151 of A2 NO and A2 COM. If the current sampled gas concentration reaches the A1 level alarm, the signal processing module 12 can control the display module 13 to display the A1 level alarm. Meanwhile, the signal processing module 12 may send a first instruction to the indication unit 14 to control the indication unit 14 to switch to light the red light at the first frequency. Meanwhile, the signal processing module 12 may also send a second instruction to each relay output 151 corresponding to the A1 level. In response to receiving the second command, the A1 NC controls the connected valve to be closed corresponding to the relay output 151. Since the A2 level alarm has not been reached, the signal processing module 12 will not send the second command to each relay output 151 corresponding to the A2 level, the corresponding A2 NO corresponding relay output 151 will not transmit the second command to the outside, and the state of the rolling shutter door will not be changed. Since the A1 NO corresponding relay output 151 is not connected to an external actuator, the second command is not transmitted to the outside.

In one implementation, with continued reference to fig. 1 and 2, the body 10 may include a human-machine interaction module 16 coupled to the signal processing module 12.

Specifically, the human-computer interaction module 16 may include one or more buttons (buttons). The third instruction input by the user is received through the physical key and transmitted to the signal processing module 12.

Further, the man-machine interaction module 16 may include a man-machine interaction menu displayed on the display module 13. The response result of the signal processing module 12 to the third instruction is displayed to the user through the virtual man-machine interaction menu.

Further, the third instruction may be used to set parameters such as the range, unit, etc. of the display 1. For example, the keys may include an increase key (Δ), a decrease key (v), and a confirm key (ok). The user sends a third instruction by touching the key, such as touching the third instruction that the increase key corresponds to the up-adjustment parameter or scrolls upwards, touching the third instruction that the decrease key corresponds to the down-adjustment parameter or scrolls downwards, touching the confirmation key corresponds to the third instruction that the man-machine interaction is ended. In response to receiving the third instruction, the signal processing module 12 performs a corresponding operation, and displays the execution process and the execution result on the display module 13 for the user to browse.

In one implementation, the human-machine interaction module 16 may receive the third instruction in a non-contact manner. This is favorable to improving the security of field operation, and the protection display instrument 1 that can be better prolongs equipment life.

In particular, the sampled device 2 may be of an explosion-proof design, such as the body 10 may be sealed within an explosion-proof enclosure. In this embodiment, the physical key of the man-machine interaction module 16 may be, for example, a magnetic switch, and the user activates the corresponding key to send the third instruction using a magnetic bar. Therefore, a user can quickly set and maintain on site by using the magnetic rod, and man-machine interaction with the display instrument 1 can be completed without opening the explosion-proof box.

In a variation, the key of the human-computer interaction module 16 may be removed, and the third instruction issued by the user may be sensed by integrating a sensing device in the body 10. The sensing device may be, for example, a gesture recognition device, a voice recognition device, etc. Thus, the man-machine interaction with the display 1 can be completed without touching the body 10 as well.

In one implementation, the display 1 may further include: and the audible and visual alarm module (not shown) is used for giving an alarm according to the first instruction.

Specifically, the audible and visual alarm module is disposed on the body 10 and directly or indirectly coupled to the power input 10a to obtain a power supply independent of the signal line during operation. Wherein, the direct coupling means that the audible and visual alarm module is directly and electrically connected with the power input end 10a. Indirect coupling may refer, for example, to indirectly taking power from the power input 10a through other components (e.g., the inverter 17, the signal processing module 12, etc.).

In some examples, the audible and visual alarm module may be a separate component from the indication unit 14, alerting the outside by a different manner of alerting than employed by the indication unit 14. For example, the audible and visual alarm module may sound and/or light to alert the outside.

Further, the audible and visual alarm module is detachably coupled to the body 10. An audible and visual alarm module connected to the body 10 may be coupled to the signal processing module 12 to obtain the first instruction generated by the signal processing module 12. Since the power supply of the audible and visual alarm module comes from the power line 22, the operation of adding the audible and visual alarm module to the body 10 does not affect the signal transmission on the signal line 21.

Taking the sampled device 2 as a temperature sensor for example, the signal transmitted on the signal line 21 may be a current signal, and the value of the current signal may represent the temperature information currently sensed by the temperature sensor. The signal processing module 12 receives the current signal sampled by the sampling module 11 from the signal line 21. If the sampled current signal is higher than a preset threshold value, the abnormal state of the area sensed by the temperature sensor is indicated, such as a fire alarm. At this time, the signal processing module 21 may generate a first instruction and send the first instruction to the external audible and visual alarm module. And responding to the received first instruction, and sending out an alarm by the audible and visual alarm module.

Further, the user can mount the audible and visual annunciator to the body 10 as desired. For example, an audible and visual alarm may be plugged into the side of the body 10.

Further, the relay output array 15, the indication unit 14, the display module 13 and the audible and visual alarm module may be linked under the control of the signal processing module 12, so as to give an alarm in all directions and in time while displaying the signal transmitted on the signal line 21.

In some embodiments, the audible and visual alarm module may also be embedded in the body 10, and the user may turn the audible and visual alarm module on or off as desired.

In one implementation, the display apparatus shown in fig. 1 and 2 is mainly different in that the display apparatus 1 shown in fig. 2 may further include: the wireless transmission module 3 is disposed on the body 10 and coupled to a power source (e.g., a power source input end 10 a), and the body 10 can wirelessly communicate with the outside and/or receive a control command through the wireless transmission module 3.

Specifically, since the display 1 is independently powered, wireless function expansion can be easily achieved without considering the influence of power consumption of the display 1 on the transmission signal on the signal line 21.

In some examples, the wireless transmission module 3 is detachably coupled to the body 10. The interface reserved by the body 10 is inserted into the wireless transmission module 3 for data communication, so that the wireless data transmission can be realized without additional equipment investment and cable laying.

Further, the wireless transmission module 3 connected to the body 10 may be coupled to the signal processing module 12. The signal processing module 12 may wirelessly transmit the processed sampling result to the intelligent terminal 31 through the wireless transmission module 3.

Further, the signal processing module 12 may also wirelessly transmit the state level of the physical quantity measured by the sampled device 2 determined according to the comparison result of the processed sampling result and the preset threshold value to the intelligent terminal 31 through the wireless transmission module 3.

The intelligent terminal 31 may be, for example, a mobile phone of a user, a tablet personal computer IPAD, a cloud server, a control computer provided at any location on an industrial site, etc.

Further, the wireless transmission module 3 can adopt wireless fidelity Wi-Fi, zigbee, bluetooth and other technologies to realize wireless communication.

Further, the signal processing module 12 may establish a communication connection with the intelligent terminal 31 through the wireless transmission module 3, so as to receive a control instruction sent by the user through the intelligent terminal 31.

The control instruction may be, for example, the aforementioned third instruction. Thus, the remote control of the display 1 can be realized, and the user can remotely modify parameters such as the measuring range, the unit and the like of the display 1.

Thus, since the independent power supply is realized through the power line 22, the display apparatus 1 can be arbitrarily increased in functional components without being limited by the low power consumption requirement.

In some examples, the wireless transmission module 3 may be embedded in the body 10, and the user may turn on or off the wireless transmission module 3 as desired. When the wireless transmission module 3 is turned on (or activated), a data path is established with the signal processing module 12, so that the body 10 can wirelessly communicate with the outside through the wireless transmission module 3 and/or receive control instructions.

In one implementation, the wireless transmission module 3 may also be used as a relay, and the body 10 may receive and forward the communication data of the other display 1 through the wireless transmission module 3.

Specifically, in the case where the industrial field area is large, the display 1 is far from the intelligent terminal 31, the wireless transmission module 3 to which the display 1 can be coupled closer to the intelligent terminal 31 acts as a wireless repeater. The wireless repeater can perform wireless data transfer between the display 1 and the intelligent terminal 31 which are far away to increase the wireless communication distance.

For example, an industrial site may be provided with a plurality of displays 1, and a plurality of displays 1 may be connected in series to the same signal line 21, or may be connected in series to different signal lines 21 to monitor the output signals of different sampled devices 2. At least part of the display 1 is coupled with wireless transmission modules 3, and the wireless transmission modules 3 can form a wireless networking.

For each wireless transmission module 3 in the wireless networking, the wireless transmission module 3 may continuously receive nearby communication data, and determine whether to forward the received communication data according to its busy degree. Alternatively, the wireless transmission module 3 may switch to the relay mode when the signal processing module 12 connected to itself does not have a need to transmit data outward. Alternatively, the wireless transmission module 3 may switch to the relay mode according to a control instruction from the user.

By doing so, the display apparatus 1 according to the present embodiment supplies power via the power line 22 and samples the signal via the signal line 21, so that it is possible to reduce or even eliminate interference or loss to the signal while accurately collecting the signal output by the sampling device 2. Furthermore, the display instrument 1 in the embodiment adopts independent power supply, is convenient to wire, friendly in interface and low in cost.

In a variation, the sampled device 2 may transmit the signal outwards in a wireless transmission manner, and the signal end of the sampled device 2 may be a wireless output end. Accordingly, the display 1 may establish a wireless communication connection with the sampled device 2 through the wireless transmission module 3 to be coupled to the signal terminal of the sampled device 2 and acquire the signal output by the sampled device 2.

In a variation, the power source terminal to which power is supplied during operation of the body 10 may be a power supply terminal independent of the power source terminal of the sampled device 2. Thereby, independent power supply independent of the signal line 21 of the sampled device 2 can be achieved as well.

For example, a socket may be connected nearby at the set position of the display 1 to supply power to the body 10 independently.

For another example, a wireless rf charging terminal may be provided near the display 1 to provide independent power to the body 10 by wireless charging.

Further, some of the modules in the body 10 may be powered from the power cord 22 of the sampled device 2, and the remaining modules may be powered from power supply terminals independent of the power supply end of the sampled device 2. For example, the signal processing module 12 in the body 10 may be powered by the power line 22 of the sampled device 2, and other modules in the body 10 are in a sleep state at ordinary times and powered by the wireless radio frequency charging terminal after being awakened by the signal processing module 12.

Fig. 3 is a schematic diagram of a display system 4 according to an embodiment of the present utility model.

Specifically, referring to fig. 3, the display system 4 may be arranged at an industrial site 41, which industrial site 41 is provided with a sampled device 2 to sense a specific physical quantity within the environment, and the sensing result is transmitted to a control room 43 through a signal line 21. The power line 22, the signal line 21 and the ground line 23 may be made as a single wire connected to a control cabinet of the control room 43. The power line 22 of the sampled device 2 is connected with 18-30V power voltage, and the ground line 23 is grounded GND, wherein the power voltage can be arranged in the control room 43 or any position of the industrial site 41.

In view of the complexity of the industrial field and the long distance of signal transmission, the display apparatus 1 shown in fig. 1 or fig. 2 can be conveniently connected in series at any position between the sampled device 2 and the control room 43, so that a user can collect and visually display the output signal of the sampled device 2 in real time.

For example, the sampled device 2 may be positioned in a small space that cannot be directly viewed by a user. In this example, the display 1 shown in fig. 1 or 2 described above may be provided at a position that is convenient for the user to view.

For another example, a point on the industrial site 41 is provided with the sampled device 2, and other points on the industrial site 41 all have output signals of the sampled device 2 that the user needs to monitor in real time. In this example, the display 1 shown in fig. 1 or fig. 2 may be installed at all points where the user needs to monitor in real time, so as to meet the requirements of multi-point detection of the industrial site 41 and the user's nearby monitoring.

Specifically, the display system 4 may include: a plurality of the display apparatuses 1 described in the embodiments shown in fig. 1 or fig. 2 are connected to different positions of the signal line 21 of the sampled device 2. The independent power supply is realized through the power line 22, so that the sampling action of the display instrument 1 can not influence the signal transmitted on the signal line 21, and the number of the display instruments 1 which can be connected on the signal line 21 is more flexible.

Fig. 3 illustrates an exemplary display device 1 with three display devices 1 connected in series at different positions of the signal line 21. The signal input ends 10c and the signal output ends 10d of the three display instruments 1 are respectively connected to the signal line 21, the power input ends 10a of the three display instruments 1 are connected to the power line 22, and the power output ends 10b of the three display instruments 1 are connected to the ground line 23. The three displays 1 are all suitable for collecting signals transmitted on the signal line 1 and displaying the signals in real time, and a user can check any one display 1 to monitor the sampled equipment 2 in real time.

For convenience of description, three monitors 1 are respectively referred to as a monitor S1, a monitor S2, and a monitor S3. The display S1, the display S2 and the display S3 may be arranged at different workshops of the industrial site 41, or at different areas of the same workshops.

Further, a wireless transmission module 3 may be connected to the display S1 and the display S2 to transmit the processed sampling result to the intelligent terminal 31 through wireless transmission. In this example scenario, the wireless transmission module 3 to which the display S2 is connected may be used as a wireless repeater to implement communication data transfer between the display S1 and the intelligent terminal 31 that are farther away. For example, the display S1 sends out the processed sampling result through the connected wireless transmission module 3, and the display S2 receives the processed sampling result sent by the display S1 through the connected wireless transmission module 3 and forwards the processed sampling result to the intelligent terminal 31.

In one implementation, for at least one display 1 of the plurality of displays 1, the signal processing module 12 of the display 1 may control at least one component of the body 10 to switch between an operating state and a sleep state according to a result of sensing the human body 44. Thereby, the service life of the component can be prolonged.

Specifically, the components within the body 10 may be in a sleep state at ordinary times and switch to an operating state when the approach of the human body 44 is sensed to collect signals transmitted on the signal line 21 and display them to the user.

The component within the body 10 adapted to switch between an operating state and a dormant state may be, for example, the display module 13. For example, the LCD is in a sleep state at ordinary times, during which the sampled processing results are not presented on the LCD, or the screen of the LCD is dark although presented. When the human body 44 is sensed to be close to the body 10, the signal processing module 12 may control the LCD to be turned on to clearly present the sampled processing result. Thus, the service life of the LCD can be greatly prolonged.

In one implementation, the sensing result of the human body 44 may be sensed by a sensing module (not shown) disposed on the body 10.

Specifically, the display 1 may include: the sensing module coupled to the signal processing module 12 is configured to generate a sensing signal according to a sensing result of the human body 44 approaching or moving away from the body 10. Accordingly, the signal processing module 12 may control at least one component of the body 10 to switch between the operational state and the sleep state according to the sensing signal.

The sensing module may be, for example, an infrared detector.

Further, the sensing module may be integrated within the body 10. Alternatively, the sensing module may be a detachable device that is externally connected to the body 10.

For example, with continued reference to fig. 3, assume that display S2 incorporates an infrared detector, and that the LCD of display S2 is in a dormant state at ordinary times. In response to sensing that the human body 44 is currently in proximity, the infrared detector may send the sensing result to the signal processing module 12. The signal processing module 12 may wake up the display module 13 and illuminate the LCD. Thus, the real-time signal of the sampled device 2 is clearly visible from the illuminated LCD when the human body 44 approaches the display S2.

Further, the sampling module 11 may be in a sleep state at ordinary times, and is awakened to collect signals transmitted on the signal line 21 when the sensing module senses that the human body 44 is approaching.

In one implementation, the sensing result of the human body 44 may be recognized by the image recognition device 42 in communication with the body 1.

In particular, the industrial site 41 may be discretely arranged with at least one image recognition device 42, wherein each image recognition device 42 is adapted to take an image of a particular area of the industrial site 41.

The image recognition device 42 may be a monitoring camera existing in the industrial site 41 or may be a device specially arranged for realizing the present embodiment.

Further, the image recognition device 42 may communicate with the display 1 through the wireless communication module 3 to which the display 1 is connected.

In fig. 3, which is illustrated by way of example with two image recognition devices 42 arranged in the industrial site 41, the two image recognition devices 42 are adapted to take separate shots of different areas of the industrial site 41. For convenience of description, the two image recognition apparatuses 42 are respectively denoted as an image recognition apparatus B1 and an image recognition apparatus B2.

In a typical application scenario, the image recognition apparatus B1 can recognize whether a human body 44 is present in a captured image and a movement tendency of the human body 44 in the image. When recognizing that the human body 44 has a moving tendency toward the display S2, the image recognition apparatus B1 may transmit the recognition result to the wireless transmission module 3 to which the display S2 is connected. In response to receiving the recognition result, the signal processing module 12 of the display S2 wakes up the display module 13. Thus, the effect of automatically turning on the LCD of the display S2 when the human body 44 approaches the display S2 can be achieved.

Further, the photographing range of the single image recognition device 42 may cover the single display 1. For example, the photographing range of the image recognition apparatus B2 in fig. 3 covers the display S3.

Alternatively, the photographing range of a single image recognition device 42 may cover a plurality of the monitors 1. For example, in fig. 3, the photographing range of the image recognition apparatus B1 covers the display S1 and the display S2, and the image recognition apparatus B1 transmits the recognition result to the display 1 to which the movement trend of the human body 44 is directed, to ensure that the display 1 to which the human body 44 is currently close switches the operation state.

In another exemplary application scenario, in response to receiving the identification result of the image identification device 42, the signal processing module 12 of the display apparatus 1 may further invoke the sensing module to sense. If the recognition result of the image recognition device 42 and the sensing result of the sensing module indicate that the human body 44 is close to the body 10, the signal processing module 12 controls at least one component of the body 10 to switch from the sleep state to the working state. For example, the signal processing module 12 may control the display module 13 to switch to an operating state. For another example, the signal processing module 12 may control the display module 13 and the sampling module 11 to switch to the operation state. Thus, the accuracy of sensing the human body 44 can be improved by various discrimination methods.

Further, if the person 44 is sensed to leave the body 10, the signal processing module 12 may control at least one component of the body 10 to switch back to the sleep state.

In a variation, control instructions received from the intelligent terminal 31 may be used to control at least one component within the display 1 to switch between an operational state and a sleep state. For example, the user may use the intelligent terminal 31 to send a control instruction to the display S1, and the signal processing module 12 of the display S1 lights the LCD after receiving the control instruction through the wireless transmission module 3. Thereby, the user can switch the operation state of the display 1 as desired.

Although the present utility model is disclosed above, the present utility model is not limited thereto. Various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the utility model, and the scope of the utility model should be assessed accordingly to that of the appended claims.

Claims (13)

1. A display, comprising:

the body is coupled with the signal end of the sampled equipment and is used for collecting and displaying signals output by the signal end;

wherein, the body is independently supplied with power by a power terminal independent of the signal terminal during operation.

2. The display of claim 1, wherein the body comprises:

the sampling module is coupled with the signal end to collect signals output by the signal end;

The signal processing module is coupled with the sampling module and is used for receiving and processing the sampling result of the sampling module;

and the display module is coupled with the signal processing module to display the processed sampling result.

3. The display of claim 2, wherein the body is coupled to a signal line and a power line of the sampled device, respectively, the signal line being connected to the signal terminal, and the power line being connected to the power terminal.

4. A display according to claim 3, wherein the body comprises a signal input end and a signal output end which are respectively connected with the signal line, and the signal transmitted on the signal line flows into the sampling module from the signal input end and then flows out along the signal line from the signal output end.

5. The display of claim 2, wherein the sampled device comprises a gas sensor, and wherein the sampling module comprises:

the first signal sampling unit is used for collecting a first signal output by the signal end, and the first signal comprises a gas detection result of the gas sensor;

the second signal sampling unit is used for collecting a second signal output by the signal end, and the second signal comprises equipment information of the gas sensor.

6. The display apparatus according to claim 5, wherein the first signal is a current signal and the second signal is a modulation signal, and the signal processing module includes an analog-to-digital conversion unit for converting the sampling result output by the first signal sampling unit from an analog signal to a digital signal.

7. The display of claim 2, wherein the body further comprises:

the indication unit is coupled with the signal processing module and is used for adjusting the working state according to a first instruction, and the first instruction is generated and sent by the signal processing module at least according to the processed sampling result.

8. The display of claim 2, wherein the body further comprises:

the relay output array is coupled with the signal processing module and comprises a plurality of relay output ends, the relay output ends are used for being connected with external execution mechanisms, the relay output array is used for controlling the corresponding external execution mechanisms to switch working states according to second instructions, and the second instructions are generated and sent by the signal processing module according to the processed sampling results.

9. The display of claim 2, further comprising:

the sensing module is coupled with the signal processing module and is used for generating a sensing signal according to a sensing result of approaching or separating a human body from the body, and the signal processing module controls at least one component of the body to switch between a working state and a dormant state according to the sensing signal.

10. The display of claim 1, further comprising:

the wireless transmission module is arranged on the body and coupled with the power supply end, and the body is in wireless communication with the outside through the wireless transmission module and/or receives control instructions.

11. The display of claim 10, wherein the body receives and forwards communication data of other displays via the wireless transmission module.

12. The display of claim 1, wherein the sampled device comprises a gas sensor.

13. A display system, comprising:

a plurality of displays according to any one of claims 1 to 12, each connected to a different location of a signal line of the sampled device, the signal lines being connected to the signal terminals.

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