<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0035-001X</journal-id>
<journal-title><![CDATA[Revista mexicana de física]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. mex. fis.]]></abbrev-journal-title>
<issn>0035-001X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Física]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0035-001X2019000500560</article-id>
<article-id pub-id-type="doi">10.31349/revmexfis.65.560</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Design and construction of a single-axis, low-frequency magnetic probe (B-dot probe) calibrated with a LC var Helmholtz resonant circuit]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lindero-Hernández]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Espino-Hernández]]></surname>
<given-names><![CDATA[A.G.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Romero-Bastida]]></surname>
<given-names><![CDATA[M.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Politécnico Nacional Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada ]]></institution>
<addr-line><![CDATA[Querétaro Qro.]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Tecnológico Nacional  ]]></institution>
<addr-line><![CDATA[Santiago de Querétaro Qro.]]></addr-line>
<country>México</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Instituto Politécnico Nacional Escuela Superior de Ingeniería Mecánica y Eléctrica Sección de Estudios de Posgrado e Investigación]]></institution>
<addr-line><![CDATA[Culhuacán ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>10</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>10</month>
<year>2019</year>
</pub-date>
<volume>65</volume>
<numero>5</numero>
<fpage>560</fpage>
<lpage>565</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S0035-001X2019000500560&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S0035-001X2019000500560&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S0035-001X2019000500560&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Magnetic probes (also known as B-dot coil) are electromagnetic devices used to measure magnetic field variations in many frequency ranges. The measured magnetic field frequency directly relates to the elected method to make the B-dot coil calibration. This work presents a B-dot coil calibration in a frequency range from 6.16 kHz to 36.63 kHz. An inductor L (Helmholtz coil) connects in parallel with a variable capacitor bank C  var to form a coupled LC  var resonant circuit. The LC  var circuit is fed with a half bridge oscillator. The capacitance C  var is varied until the circuit is in a resonant state at different frequencies. The resonant circuit produces sinusoidal oscillations in the aforementioned frequency band. The sensitivity is calculated by using voltage V  out of the B-dot coil and voltage V  H measured from Helmholtz terminals.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Las sondas magnéticas (también conocidas como bobinas de punto B) son dispositivos electromagnéticos utilizados para medir la variación del campo magnético en muchos rangos de frecuencia. La frecuencia del campo magnético a medir se relaciona directamente con el método elegido para realizar la calibración de la bobina de punto B. Este trabajo presenta una calibración de bobina de punto B en un rango de frecuencia de 6.16 kHz a 36.63 kHz. Un inductor L (bobina de Helmholtz) se conecta en paralelo con un banco de condensadores variable C  var para formar un circuito resonante LC  var acoplado. El circuito LC  var se alimenta con un oscilador de medio puente. La capacidad C  var varía hasta que el circuito se encuentra en estado resonante a diferentes frecuencias. El circuito resonante produce oscilaciones sinusoidales en la frecuencia de banda mencionada. La sensibilidad se calcula utilizando el voltaje V  out de la bobina de punto B y el voltaje V  H medido desde las terminales de Helmholtz.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[B-dot]]></kwd>
<kwd lng="en"><![CDATA[Half bridge oscillator]]></kwd>
<kwd lng="en"><![CDATA[LC var resonant circuit]]></kwd>
<kwd lng="en"><![CDATA[07.55.-w]]></kwd>
<kwd lng="en"><![CDATA[85.70.Ay]]></kwd>
<kwd lng="es"><![CDATA[B-dot]]></kwd>
<kwd lng="es"><![CDATA[oscilador medio puente]]></kwd>
<kwd lng="es"><![CDATA[circuito resonante LC var]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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