公开(公告)号：WO2017167367A1

公开(公告)日：2017-10-05

申请号：PCT/EP2016/057017

申请日：2016-03-31

Applicant: DANFOSS A/S

Inventor： JESPERSEN, Lars ,  CARSTENSEN, Morten

IPC: G01D4/00 ,  H04L25/02

Abstract: A utility meter (1) is described comprising a metering section (2), a communication interface (3), and a communication path (4) providing a galvanic isolation between said metering section (2) and said communication interface (3). Such a utility meter should be operated with low power consumption. To this end said communication path (4) comprises a transformer (5) having a primary side with a first primary terminal and a second primary terminal connected to said metering section (2) and a secondary side (S) connected to said communication interface.

Abstract translation: （2），通信接口（3）以及提供所述计量部分（2）与所述计量部分（2）之间的电流隔离的通信路径（4）的公用仪表（1） 所述通信接口（3）。 这种公用电表应该以低功耗运行。 为此，所述通信路径（4）包括变压器（5），该变压器具有连接到所述计量部分（2）的具有第一主要端子和第二主要端子的主侧以及连接到所述通信接口的次级侧（S）。

公开(公告)号：WO2016180549A1

公开(公告)日：2016-11-17

申请号：PCT/EP2016/053748

申请日：2016-02-23

Applicant: DANFOSS A/S

Inventor： JESPERSEN, Lars

IPC: G01F1/66 ,  G01H5/00 ,  G01F23/296

CPC classification number: G01F1/667 ,  G01F23/296 ,  G01H5/00

Abstract: A method for determining a transit time (t t ) of an ultrasonic burst, in particular in an ultrasonic flow meter is described, said method comprising generating a first transmit signal having a first frequency and detecting a first receive signal, generating a second transmit signal having a second frequency different from the first frequency and detecting a second receive signal. Such method should allow to reliably detect the transit time with low costs. To this end a function of time based on characteristics of the two receive signals (10, 11) is used for determining the transit time.

Abstract translation: 描述了一种用于确定超声波脉冲串的通过时间（tt）的方法，特别是在超声波流量计中，所述方法包括：产生具有第一频率的第一发射信号并检测第一接收信号，产生具有 与第一频率不同的第二频率并检测第二接收信号。 这种方法应能够以低成本可靠地检测运输时间。 为此，使用基于两个接收信号（10,11）的特性的时间功能来确定传送时间。

公开(公告)号：WO2016141981A1

公开(公告)日：2016-09-15

申请号：PCT/EP2015/055035

申请日：2015-03-11

Applicant: DANFOSS A/S

Inventor： JESPERSEN, Lars

IPC: G01F1/66 ,  G01S7/523

CPC classification number: G01F1/667

Abstract: The present invention relates to a transceiver circuit for a flow meter comprising a common signal path for signals to be transmitted and received, the transceiver circuit comprising a generator circuit, a signal processing circuit and a transimpedance amplifier, wherein the transimpedance amplifier comprises a combined input/output terminal being operatively connectable to one or more associated transducers, and wherein the transimpedance amplifier provides a separate transmitting impedance ZTx between an input terminal and the combined input/output terminal, and a separate receiving impedance ZRx between the combined input/output terminal and an output terminal.

Abstract translation: 本发明涉及一种用于流量计的收发器电路，其包括用于要发送和接收的信号的公共信号路径，该收发器电路包括发生器电路，信号处理电路和跨阻抗放大器，其中跨阻放大器包括组合输入 /输出端子可操作地连接到一个或多个相关联的换能器，并且其中跨阻放大器在输入端子和组合的输入/输出端子之间提供单独的发射阻抗ZTx，以及组合的输入/输出端子与 输出端子。

公开(公告)号：WO2003036240A1

公开(公告)日：2003-05-01

申请号：PCT/DK2002/000705

申请日：2002-10-24

Applicant: DANFOSS A/S ,  JESPERSEN, Lars

Inventor： JESPERSEN, Lars

IPC: G01F1/66

CPC classification number: G01F1/667

Abstract: The invention concerns a transmitting and receiving circuit for an ultrasonic flowmeter. In such circuits, an ultrasonic transducer is typically used as both transmitter and receiver. This is obtained by using switching means, for example in the form of CMOS switches. However, problems arise with ringings of a transducer when having acted as a transmitter. This unwanted ringing makes the crystal of the transducer act as an additional signal generator, and the signal is coupled via parasitic capacitances in a switching means to the receiving ultrasonic transducer. According to the invention, this problem is solved by connecting one pole of a short circuit switch to the ultrasonic transducer or to the switching means and the other pole of the short circuit switch to ground. Keeping the short circuit switch closed when the switching means is open, and open when the switching means is closed, creates a decoupling path for the unwanted signal. This improves the accuracy of the transmitting and receiving circuit.

Abstract translation: 本发明涉及一种用于超声波流量计的发射和接收电路。 在这样的电路中，超声换能器通常用作发射器和接收器。 这是通过使用开关装置获得的，例如以CMOS开关的形式。 然而，当作为发射机发挥作用时，换能器的振铃出现问题。 这种不需要的振铃使得换能器的晶体作为附加信号发生器，并且该信号通过开关装置中的寄生电容耦合到接收超声换能器。 根据本发明，通过将短路开关的一极连接到超声波换能器或切换装置，将短路开关的另一极连接到地来解决这个问题。 当开关装置打开时，保持短路开关闭合，并且当开关装置关闭时断开，为不想要的信号产生去耦路径。 这提高了发送和接收电路的精度。

公开(公告)号：EP3436785A1

公开(公告)日：2019-02-06

申请号：EP16714845.1

申请日：2016-03-31

Applicant: Danfoss A/S

Inventor： JESPERSEN, Lars ,  CARSTENSEN, Morten

IPC: G01D4/00 ,  H04L25/02

CPC classification number: G01D4/002 ,  H04L25/0268 ,  Y02B90/241 ,  Y04S20/32

Abstract: A utility meter (1) is described comprising a metering section (2), a communication interface (3), and a communication path (4) providing a galvanic isolation between said metering section (2) and said communication interface (3). Such a utility meter should be operated with low power consumption. To this end said communication path (4) comprises a transformer (5) having a primary side with a first primary terminal and a second primary terminal connected to said metering section (2) and a secondary side (S) connected to said communication interface.

公开(公告)号：EP3268700A1

公开(公告)日：2018-01-17

申请号：EP15709175.2

申请日：2015-03-11

Applicant: Danfoss A/S

Inventor： JESPERSEN, Lars

IPC: G01F1/66 ,  G01S7/523

CPC classification number: G01F1/667

Abstract: The present invention relates to a transceiver circuit for a flow meter comprising a common signal path for signals to be transmitted and/or received via one or more associated transducers, the transceiver circuit comprising a generator circuit, a signal processing circuit and an active circuit, wherein the active circuit comprises a first and a second transistor being operatively connected via their respective emitter terminals thereby forming a combined input/output terminal, said combined input/output terminal being operatively connectable to one or more associated transducers, the active circuit being adapted to act as a buffer for signals to be transmitted, and adapted to act as an amplifier for received signals.

公开(公告)号：EP3552003A1

公开(公告)日：2019-10-16

申请号：EP16819471.0

申请日：2016-12-12

Applicant: Danfoss A/S

Inventor： JESPERSEN, Lars ,  STEFFENSEN, Henrik Bork

IPC: G01N27/22

公开(公告)号：EP3436788A1

公开(公告)日：2019-02-06

申请号：EP16714373.4

申请日：2016-03-31

Applicant: Danfoss A/S

Inventor： JESPERSEN, Lars ,  STÆR, Torben ,  STEFFENSEN, Henrik, Bork

IPC: G01F1/66

Abstract: The invention relates to a method and a system (1 ) for sampling an ultrasonic signal, comprising two ultrasonic transducers (2, 3) arranged in a fluid path connected to a control unit (4). Task of the invention is to provide a method and a system for sampling an ultrasonic signal that allows to obtain a higher resolution digital output signal without the need for an analog-to-digital converter with a high sampling frequency. The task is solved by a method comprising the following steps: a) Sending an input electric signal from the control unit (4) to a first ultrasonic transducer (2), transforming the input electric signal to an ultrasonic signal and sending it to a second ultrasonic transducer (3) through the flow path, b) transforming the received ultrasonic signal at the second ultrasonic transducer (3) to an output electric signal that is sent to the control unit (4), c) sampling the output electric signal received at the control unit to a first series of digital samples at a sampling frequency, d) repeating steps a) to c) at least once with the same electric input electric signal, wherein in step c) the time of start of the sampling measured from the time of start of the respective input electric signal and/or the sampling frequency is different from the previous sampling, e) combining the obtained series of samples to obtain a combined digital output signal.

公开(公告)号：EP3268699A1

公开(公告)日：2018-01-17

申请号：EP15708837.8

申请日：2015-03-11

Applicant: Danfoss A/S

Inventor： JESPERSEN, Lars

IPC: G01F1/66 ,  G01S7/523

CPC classification number: G01F1/667

Abstract: The present invention relates to a transceiver circuit for a flow meter comprising a common signal path for signals to be transmitted and received, the transceiver circuit comprising a generator circuit, a signal processing circuit and a transimpedance amplifier, wherein the transimpedance amplifier comprises a combined input/output terminal being operatively connectable to one or more associated transducers, and wherein the transimpedance amplifier provides a separate transmitting impedance ZTx between an input terminal and the combined input/output terminal, and a separate receiving impedance ZRx between the combined input/output terminal and an output terminal.

公开(公告)号：WO2018108242A1

公开(公告)日：2018-06-21

申请号：PCT/EP2016/080672

申请日：2016-12-12

Applicant: DANFOSS A/S

Inventor： JESPERSEN, Lars ,  STEFFENSEN, Henrik Bork

IPC: G01N27/22

Abstract: The invention relates to a capacitive water droplet sensor (1) comprising a printed circuit board. The sensor (1) comprises a first electrode (6) and a second electrode (7) both arranged in a sensor layer of the printed circuit board. The first electrode (6) and the second electrode (7) form a capacitor (2) of the sensor (1). Task of the invention is to provide a capacitive sensor that is easier to integrate into an existing printed circuit board. To this end, the first electrode (6) and the second electrode (7) are fully covered to an outside of the printed circuit board by an electrically insulating, water-non-absorbent material (8).